moved to root

inspector/Base/BlobUtilities.js

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BlobUtilities = class BlobUtilities {
+    static blobForContent(content, base64Encoded, mimeType)
+    {
+        if (base64Encoded)
+            return BlobUtilities.decodeBase64ToBlob(content, mimeType);
+        return BlobUtilities.textToBlob(content, mimeType);
+    }
+
+    static decodeBase64ToBlob(base64Data, mimeType)
+    {
+        mimeType = mimeType || "";
+
+        const sliceSize = 1024;
+        let byteCharacters = atob(base64Data);
+        let bytesLength = byteCharacters.length;
+        let slicesCount = Math.ceil(bytesLength / sliceSize);
+        let byteArrays = new Array(slicesCount);
+
+        for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
+            let begin = sliceIndex * sliceSize;
+            let end = Math.min(begin + sliceSize, bytesLength);
+
+            let bytes = new Array(end - begin);
+            for (let offset = begin, i = 0; offset < end; ++i, ++offset)
+                bytes[i] = byteCharacters[offset].charCodeAt(0);
+
+            byteArrays[sliceIndex] = new Uint8Array(bytes);
+        }
+
+        return new Blob(byteArrays, {type: mimeType});
+    }
+
+    static textToBlob(text, mimeType)
+    {
+        return new Blob([text], {type: mimeType});
+    }
+
+    static blobAsText(blob, callback)
+    {
+        console.assert(blob instanceof Blob);
+        let fileReader = new FileReader;
+        fileReader.addEventListener("loadend", () => { callback(fileReader.result); });
+        fileReader.readAsText(blob);
+    }
+};

inspector/Base/BrowserInspectorFrontendHost.js

@@ -0,0 +1,379 @@
+/*
+ * Copyright (C) 2022 Igalia S.L.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+if (!window.InspectorFrontendHost) {
+    WI.BrowserInspectorFrontendHost = class BrowserInspectorFrontendHost {
+
+        constructor()
+        {
+            this._pendingMessages = null;
+            this._socket = null;
+        }
+
+        // Public
+
+        get supportsShowCertificate()
+        {
+            return false;
+        }
+
+        get isRemote()
+        {
+            return true;
+        }
+
+        get inspectionLevel()
+        {
+            return 1;
+        }
+
+        get debuggableInfo()
+        {
+            return {
+                debuggableType: "web-page",
+                targetPlatformName: undefined,
+                targetBuildVersion: undefined,
+                targetProductVersion: undefined,
+                targetIsSimulator: false,
+            };
+        }
+
+        get platform()
+        {
+            const match = navigator.platform.match(/mac|win|linux/i);
+            if (match) {
+                const platform = match[0].toLowerCase();
+                if (platform == "win")
+                    return "windows";
+                return platform;
+            }
+            return "unknown";
+        }
+
+        get platformVersionName()
+        {
+            return "";
+        }
+
+        get supportsDiagnosticLogging()
+        {
+            return false;
+        }
+
+        get supportsWebExtensions()
+        {
+            return false;
+        }
+
+        connect()
+        {
+            const queryParams = parseQueryString(window.location.search.substring(1));
+            let url = "ws" in queryParams ? "ws://" + queryParams.ws : null;
+            if (!url)
+                return;
+
+            const socket = new WebSocket(url);
+            socket.addEventListener("message", message => InspectorBackend.dispatch(message.data));
+            socket.addEventListener("error", console.error);
+            socket.addEventListener("open", () => { this._socket = socket; });
+            socket.addEventListener("close", () => {
+                this._socket = null;
+                window.close();
+            });
+        }
+
+        loaded()
+        {
+            WI.updateVisibilityState(true);
+        }
+
+        closeWindow()
+        {
+            this._windowVisible = false;
+        }
+
+        reopen()
+        {
+            window.location.reload();
+        }
+
+        reset()
+        {
+            this.reopen();
+        }
+
+        bringToFront()
+        {
+            this._windowVisible = true;
+        }
+
+        inspectedURLChanged(title)
+        {
+            document.title = title;
+        }
+
+        showCertificate(certificate)
+        {
+            throw "unimplemented";
+        }
+
+        setZoomFactor(zoom)
+        {
+        }
+
+        zoomFactor()
+        {
+            return 1;
+        }
+
+        setForcedAppearance(appearance)
+        {
+        }
+
+        userInterfaceLayoutDirection()
+        {
+            return "ltr";
+        }
+
+        supportsDockSide(side)
+        {
+            return false;
+        }
+
+        requestDockSide(side)
+        {
+            throw "unimplemented";
+        }
+
+        setAttachedWindowHeight(height)
+        {
+        }
+
+        setAttachedWindowWidth(width)
+        {
+        }
+
+        setSheetRect(x, y, width, height)
+        {
+        }
+
+        startWindowDrag()
+        {
+        }
+
+        moveWindowBy(x, y)
+        {
+        }
+
+        copyText(text)
+        {
+            this.killText(text, false, true);
+        }
+
+        killText(text, shouldPrependToKillRing, shouldStartNewSequence)
+        {
+            // FIXME: restore focus to previously focused element.
+            let textarea = document.createElement("textarea");
+            document.body.appendChild(textarea);
+
+            if (shouldStartNewSequence) {
+                textarea.textContent = text;
+            } else {
+                textarea.select();
+                if (!document.execCommand("paste"))
+                    console.error("BrowserInspectorFrontendHost.killText: could not paste from clipboard");
+
+                if (shouldPrependToKillRing)
+                    textarea.textContent = text + textarea.textContent;
+                else
+                    textarea.textContent = textarea.textContent + text;
+            }
+
+            textarea.select();
+
+            if (!document.execCommand("copy"))
+                console.error("BrowserInspectorFrontendHost.copyText: could not copy to clipboard");
+
+            document.body.removeChild(textarea);
+        }
+
+        openURLExternally(url)
+        {
+            window.open(url, "_blank");
+        }
+
+        canSave(saveMode)
+        {
+            return false;
+        }
+
+        save(saveDatas, forceSaveAs)
+        {
+            // FIXME: Create a Blob from the content, get an object URL, open it to trigger a download.
+            throw "unimplemented";
+        }
+
+        canLoad()
+        {
+            return false;
+        }
+
+        load(path)
+        {
+            throw "unimplemented";
+        }
+
+        getPath(file)
+        {
+            return null;
+        }
+
+        canPickColorFromScreen()
+        {
+            return false;
+        }
+
+        pickColorFromScreen()
+        {
+            throw "unimplemented";
+        }
+
+        revealFileExternally(path)
+        {
+        }
+
+        getCurrentX(context)
+        {
+            return 0.0;
+        }
+
+        getCurrentY(context)
+        {
+            return 0.0;
+        }
+
+        setPath(context, path2d)
+        {
+            console.log("setPath", context, path2d);
+        }
+
+        showContextMenu(event, items)
+        {
+            this._contextMenu = WI.SoftContextMenu(items);
+            this._contextMenu.show(event);
+        }
+
+        dispatchEventAsContextMenuEvent(event)
+        {
+            if (this._contextMenu)
+                this._contextMenu.show(event);
+        }
+
+        sendMessageToBackend(message)
+        {
+            if (!this._socket) {
+                if (!this._pendingMessages)
+                    this._pendingMessages = [];
+                this._pendingMessages.push(message);
+            } else {
+                this._sendPendingMessagesToBackendIfNeeded();
+                this._socket.send(message);
+            }
+        }
+
+        unbufferedLog(message)
+        {
+            console.log(message);
+        }
+
+        isUnderTest()
+        {
+            return false;
+        }
+
+        beep()
+        {
+            // FIXME: Implement using Audio/AudioContext.
+        }
+
+        inspectInspector()
+        {
+            throw "unimplemented";
+        }
+
+        isBeingInspected()
+        {
+            return false;
+        }
+
+        setAllowsInspectingInspector(allow)
+        {
+        }
+
+        logDiagnosticEvent(eventName, content)
+        {
+            throw "unimplemented";
+        }
+
+        didShowExtensionTab(extensionID, extensionTabID, extensionFrame)
+        {
+            throw "unimplemented";
+        }
+
+        didHideExtensionTab(extensionID, extensionTabID)
+        {
+            throw "unimplemented";
+        }
+
+        didNavigateExtensionTab(extensionID, extensionTabID, newURL)
+        {
+            throw "unimplemented";
+        }
+
+        inspectedPageDidNavigate(newURL)
+        {
+            throw "unimplemented";
+        }
+
+        evaluateScriptInExtensionTab(extensionFrame, scriptSource)
+        {
+            throw "unimplemented";
+        }
+
+        // Private
+
+        _sendPendingMessagesToBackendIfNeeded()
+        {
+            if (this._pendingMessages) {
+                this._pendingMessages.forEach(message => this._socket.send(message));
+                this._pendingMessages = null;
+            }
+        }
+    };
+
+    InspectorFrontendHost = new WI.BrowserInspectorFrontendHost();
+
+    WI.dontLocalizeUserInterface = true;
+}

inspector/Base/DOMUtilities.js

@@ -0,0 +1,413 @@
+/*
+ * Copyright (C) 2011 Google Inc.  All rights reserved.
+ * Copyright (C) 2007, 2008, 2013 Apple Inc.  All rights reserved.
+ * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
+ * Copyright (C) 2009 Joseph Pecoraro
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.roleSelectorForNode = function(node)
+{
+    // This is proposed syntax for CSS 4 computed role selector :role(foo) and subject to change.
+    // See http://lists.w3.org/Archives/Public/www-style/2013Jul/0104.html
+    var title = "";
+    var role = node.computedRole();
+    if (role)
+        title = ":role(" + role + ")";
+    return title;
+};
+
+WI.linkifyAccessibilityNodeReference = function(node)
+{
+    if (!node)
+        return null;
+    // Same as linkifyNodeReference except the link text has the classnames removed...
+    // ...for list brevity, and both text and title have roleSelectorForNode appended.
+    var link = WI.linkifyNodeReference(node);
+    var tagIdSelector = link.title;
+    var classSelectorIndex = tagIdSelector.indexOf(".");
+    if (classSelectorIndex > -1)
+        tagIdSelector = tagIdSelector.substring(0, classSelectorIndex);
+    var roleSelector = WI.roleSelectorForNode(node);
+    link.textContent = tagIdSelector + roleSelector;
+    link.title += roleSelector;
+    return link;
+};
+
+WI.linkifyStyleable = function(styleable)
+{
+    console.assert(styleable instanceof WI.DOMStyleable, styleable);
+    let displayName = styleable.displayName;
+    let link = document.createElement("span");
+    link.append(displayName);
+    return WI.linkifyNodeReferenceElement(styleable.node, link, {displayName});
+};
+
+WI.linkifyNodeReference = function(node, options = {})
+{
+    let displayName = node.displayName;
+    if (!isNaN(options.maxLength))
+        displayName = displayName.truncate(options.maxLength);
+
+    let link = document.createElement("span");
+    link.append(displayName);
+    return WI.linkifyNodeReferenceElement(node, link, {...options, displayName});
+};
+
+WI.linkifyNodeReferenceElement = function(node, element, options = {})
+{
+    element.setAttribute("role", "link");
+    element.title = options.displayName || node.displayName;
+
+    let nodeType = node.nodeType();
+    if (!options.ignoreClick && (nodeType !== Node.DOCUMENT_NODE || node.parentNode) && nodeType !== Node.TEXT_NODE)
+        element.classList.add("node-link");
+
+    WI.bindInteractionsForNodeToElement(node, element, options);
+
+    return element;
+};
+
+WI.bindInteractionsForNodeToElement = function(node, element, options = {}) {
+    if (!options.ignoreClick) {
+        element.addEventListener("click", (event) => {
+            WI.domManager.inspectElement(node.id, {
+                initiatorHint: WI.TabBrowser.TabNavigationInitiator.LinkClick,
+            });
+        });
+    }
+
+    element.addEventListener("mouseover", (event) => {
+        node.highlight();
+    });
+
+    element.addEventListener("mouseout", (event) => {
+        WI.domManager.hideDOMNodeHighlight();
+    });
+
+    element.addEventListener("contextmenu", (event) => {
+        let contextMenu = WI.ContextMenu.createFromEvent(event);
+        WI.appendContextMenuItemsForDOMNode(contextMenu, node, options);
+    });
+};
+
+function createSVGElement(tagName)
+{
+    return document.createElementNS("http://www.w3.org/2000/svg", tagName);
+}
+
+WI.cssPath = function(node, options = {})
+{
+    console.assert(node instanceof WI.DOMNode, "Expected a DOMNode.");
+    if (node.nodeType() !== Node.ELEMENT_NODE)
+        return "";
+
+    let suffix = "";
+    if (node.isPseudoElement()) {
+        suffix = "::" + node.pseudoType();
+        node = node.parentNode;
+    }
+
+    let components = [];
+    while (node) {
+        let component = WI.cssPathComponent(node, options);
+        if (!component)
+            break;
+        components.push(component);
+        if (component.done)
+            break;
+        node = node.parentNode;
+    }
+
+    components.reverse();
+    return components.map((x) => x.value).join(" > ") + suffix;
+};
+
+WI.cssPathComponent = function(node, options = {})
+{
+    console.assert(node instanceof WI.DOMNode, "Expected a DOMNode.");
+    console.assert(!node.isPseudoElement());
+    if (node.nodeType() !== Node.ELEMENT_NODE)
+        return null;
+
+    let nodeName = node.nodeNameInCorrectCase();
+
+    // Root node does not have siblings.
+    if (!node.parentNode || node.parentNode.nodeType() === Node.DOCUMENT_NODE)
+        return {value: nodeName, done: true};
+
+    if (options.full) {
+        function getUniqueAttributes(domNode) {
+            let uniqueAttributes = new Map;
+            for (let attribute of domNode.attributes()) {
+                let values = [attribute.value];
+                if (attribute.name === "id" || attribute.name === "class")
+                    values = attribute.value.split(/\s+/);
+                uniqueAttributes.set(attribute.name, new Set(values));
+            }
+            return uniqueAttributes;
+        }
+
+        let nodeIndex = 0;
+        let needsNthChild = false;
+        let uniqueAttributes = getUniqueAttributes(node);
+        node.parentNode.children.forEach((child, i) => {
+            if (child.nodeType() !== Node.ELEMENT_NODE)
+                return;
+
+            if (child === node) {
+                nodeIndex = i;
+                return;
+            }
+
+            if (needsNthChild || child.nodeNameInCorrectCase() !== nodeName)
+                return;
+
+            let childUniqueAttributes = getUniqueAttributes(child);
+            let subsetCount = 0;
+            for (let [name, values] of uniqueAttributes) {
+                let childValues = childUniqueAttributes.get(name);
+                if (childValues && values.size <= childValues.size && values.isSubsetOf(childValues))
+                    ++subsetCount;
+            }
+
+            if (subsetCount === uniqueAttributes.size)
+                needsNthChild = true;
+        });
+
+        function selectorForAttribute(values, prefix = "", shouldCSSEscape = false) {
+            if (!values || !values.size)
+                return "";
+            values = Array.from(values);
+            values = values.filter((value) => value && value.length);
+            if (!values.length)
+                return "";
+            values = values.map((value) => shouldCSSEscape ? CSS.escape(value) : value.escapeCharacters("\""));
+            return prefix + values.join(prefix);
+        }
+
+        let selector = nodeName;
+        selector += selectorForAttribute(uniqueAttributes.get("id"), "#", true);
+        selector += selectorForAttribute(uniqueAttributes.get("class"), ".", true);
+        for (let [attribute, values] of uniqueAttributes) {
+            if (attribute !== "id" && attribute !== "class")
+                selector += `[${attribute}="${selectorForAttribute(values)}"]`;
+        }
+
+        if (needsNthChild)
+            selector += `:nth-child(${nodeIndex + 1})`;
+
+        return {value: selector, done: false};
+    }
+
+    let lowerNodeName = node.nodeName().toLowerCase();
+
+    // html, head, and body are unique nodes.
+    if (lowerNodeName === "body" || lowerNodeName === "head" || lowerNodeName === "html")
+        return {value: nodeName, done: true};
+
+    // #id is unique.
+    let id = node.getAttribute("id");
+    if (id)
+        return {value: node.escapedIdSelector, done: true};
+
+    // Find uniqueness among siblings.
+    //   - look for a unique className
+    //   - look for a unique tagName
+    //   - fallback to nth-child()
+
+    function classNames(node) {
+        let classAttribute = node.getAttribute("class");
+        return classAttribute ? classAttribute.trim().split(/\s+/) : [];
+    }
+
+    let nthChildIndex = -1;
+    let hasUniqueTagName = true;
+    let uniqueClasses = new Set(classNames(node));
+
+    let siblings = node.parentNode.children;
+    let elementIndex = 0;
+    for (let sibling of siblings) {
+        if (sibling.nodeType() !== Node.ELEMENT_NODE)
+            continue;
+
+        elementIndex++;
+        if (sibling === node) {
+            nthChildIndex = elementIndex;
+            continue;
+        }
+
+        if (sibling.nodeNameInCorrectCase() === nodeName)
+            hasUniqueTagName = false;
+
+        if (uniqueClasses.size) {
+            let siblingClassNames = classNames(sibling);
+            for (let className of siblingClassNames)
+                uniqueClasses.delete(className);
+        }
+    }
+
+    let selector = nodeName;
+    if (lowerNodeName === "input" && node.getAttribute("type") && !uniqueClasses.size)
+        selector += `[type="${node.getAttribute("type")}"]`;
+    if (!hasUniqueTagName) {
+        if (uniqueClasses.size)
+            selector += node.escapedClassSelector;
+        else
+            selector += `:nth-child(${nthChildIndex})`;
+    }
+
+    return {value: selector, done: false};
+};
+
+WI.xpath = function(node)
+{
+    console.assert(node instanceof WI.DOMNode, "Expected a DOMNode.");
+
+    if (node.nodeType() === Node.DOCUMENT_NODE)
+        return "/";
+
+    let components = [];
+    while (node) {
+        let component = WI.xpathComponent(node);
+        if (!component)
+            break;
+        components.push(component);
+        if (component.done)
+            break;
+        node = node.parentNode;
+    }
+
+    components.reverse();
+
+    let prefix = components.length && components[0].done ? "" : "/";
+    return prefix + components.map((x) => x.value).join("/");
+};
+
+WI.xpathComponent = function(node)
+{
+    console.assert(node instanceof WI.DOMNode, "Expected a DOMNode.");
+
+    let index = WI.xpathIndex(node);
+    if (index === -1)
+        return null;
+
+    let value;
+
+    switch (node.nodeType()) {
+    case Node.DOCUMENT_NODE:
+        return {value: "", done: true};
+    case Node.ELEMENT_NODE:
+        var id = node.getAttribute("id");
+        if (id)
+            return {value: `//*[@id="${id}"]`, done: true};
+        value = node.localName();
+        break;
+    case Node.ATTRIBUTE_NODE:
+        value = `@${node.nodeName()}`;
+        break;
+    case Node.TEXT_NODE:
+    case Node.CDATA_SECTION_NODE:
+        value = "text()";
+        break;
+    case Node.COMMENT_NODE:
+        value = "comment()";
+        break;
+    case Node.PROCESSING_INSTRUCTION_NODE:
+        value = "processing-instruction()";
+        break;
+    default:
+        value = "";
+        break;
+    }
+
+    if (index > 0)
+        value += `[${index}]`;
+
+    return {value, done: false};
+};
+
+WI.xpathIndex = function(node)
+{
+    // Root node.
+    if (!node.parentNode)
+        return 0;
+
+    // No siblings.
+    let siblings = node.parentNode.children;
+    if (siblings.length <= 1)
+        return 0;
+
+    // Find uniqueness among siblings.
+    //   - look for a unique localName
+    //   - fallback to index
+
+    function isSimiliarNode(a, b) {
+        if (a === b)
+            return true;
+
+        let aType = a.nodeType();
+        let bType = b.nodeType();
+
+        if (aType === Node.ELEMENT_NODE && bType === Node.ELEMENT_NODE)
+            return a.localName() === b.localName();
+
+        // XPath CDATA and text() are the same.
+        if (aType === Node.CDATA_SECTION_NODE)
+            return aType === Node.TEXT_NODE;
+        if (bType === Node.CDATA_SECTION_NODE)
+            return bType === Node.TEXT_NODE;
+
+        return aType === bType;
+    }
+
+    let unique = true;
+    let xPathIndex = -1;
+
+    let xPathIndexCounter = 1; // XPath indices start at 1.
+    for (let sibling of siblings) {
+        if (!isSimiliarNode(node, sibling))
+            continue;
+
+        if (node === sibling) {
+            xPathIndex = xPathIndexCounter;
+            if (!unique)
+                return xPathIndex;
+        } else {
+            unique = false;
+            if (xPathIndex !== -1)
+                return xPathIndex;
+        }
+
+        xPathIndexCounter++;
+    }
+
+    if (unique)
+        return 0;
+
+    console.assert(xPathIndex > 0, "Should have found the node.");
+    return xPathIndex;
+};

inspector/Base/Debouncer.js

@@ -0,0 +1,134 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Debouncer wraps a function and continues to delay its invocation as long as
+// clients continue to delay its firing. The most recent delay call overrides
+// previous calls. Delays may be timeouts, animation frames, or microtasks.
+//
+// Example:
+//
+//     let debouncer = new Debouncer(() => { this.refresh() });
+//     element.addEventListener("keydown", (event) => { debouncer.delayForTime(100); });
+//
+// Will ensure `refresh` will not happen until no keyevent has happened in 100ms:
+//
+//               0ms          100ms         200ms         300ms         400ms
+//     time:      |-------------|-------------|-------------|-------------|
+//     delay:     ^     ^ ^        ^      ^        ^    ^   ^
+//     refreshes:                                                         * (1)
+//
+// When the wrapped function is actually called, it will be given the most recent set of arguments.
+
+class Debouncer
+{
+    constructor(callback)
+    {
+        console.assert(typeof callback === "function");
+
+        this._callback = callback;
+        this._lastArguments = [];
+
+        this._timeoutIdentifier = undefined;
+        this._animationFrameIdentifier = undefined;
+        this._promiseIdentifier = undefined;
+    }
+
+    // Public
+
+    force()
+    {
+        this._lastArguments = arguments;
+        this._execute();
+    }
+
+    delayForTime(time, ...args)
+    {
+        console.assert(time >= 0);
+
+        this.cancel();
+
+        this._lastArguments = args;
+
+        this._timeoutIdentifier = setTimeout(() => {
+            this._execute();
+        }, time);
+    }
+
+    delayForFrame()
+    {
+        this.cancel();
+
+        this._lastArguments = arguments;
+
+        this._animationFrameIdentifier = requestAnimationFrame(() => {
+            this._execute();
+        });
+    }
+
+    delayForMicrotask()
+    {
+        this.cancel();
+
+        this._lastArguments = arguments;
+
+        let promiseIdentifier = Symbol("next-microtask");
+
+        this._promiseIdentifier = promiseIdentifier;
+
+        queueMicrotask(() => {
+            if (this._promiseIdentifier === promiseIdentifier)
+                this._execute();
+        });
+    }
+
+    cancel()
+    {
+        this._lastArguments = [];
+
+        if (this._timeoutIdentifier) {
+            clearTimeout(this._timeoutIdentifier);
+            this._timeoutIdentifier = undefined;
+        }
+
+        if (this._animationFrameIdentifier) {
+            cancelAnimationFrame(this._animationFrameIdentifier);
+            this._animationFrameIdentifier = undefined;
+        }
+
+        if (this._promiseIdentifier)
+            this._promiseIdentifier = undefined;
+    }
+
+    // Private
+
+    _execute()
+    {
+        let args = this._lastArguments;
+
+        this.cancel();
+
+        this._callback.apply(undefined, args);
+    }
+}

inspector/Base/DebuggableType.js

@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.DebuggableType = {
+    ITML: "itml",
+    JavaScript: "javascript",
+    Page: "page",
+    ServiceWorker: "service-worker",
+    WebPage: "web-page",
+};
+
+WI.DebuggableType.fromString = function(type) {
+    switch (type) {
+    case "itml":
+        return WI.DebuggableType.ITML;
+    case "javascript":
+        return WI.DebuggableType.JavaScript;
+    case "page":
+        return WI.DebuggableType.Page;
+    case "service-worker":
+        return WI.DebuggableType.ServiceWorker;
+    case "web-page":
+        return WI.DebuggableType.WebPage;
+    }
+
+    console.assert(false, "Unknown debuggable type", type);
+    return null;
+};
+
+WI.DebuggableType.supportedTargetTypes = function(debuggableType) {
+    let targetTypes = new Set;
+
+    switch (debuggableType) {
+    case WI.DebuggableType.ITML:
+        targetTypes.add(WI.TargetType.ITML);
+        break;
+
+    case WI.DebuggableType.JavaScript:
+        targetTypes.add(WI.TargetType.JavaScript);
+        break;
+
+    case WI.DebuggableType.Page:
+        targetTypes.add(WI.TargetType.Page);
+        targetTypes.add(WI.TargetType.Worker);
+        break;
+
+    case WI.DebuggableType.ServiceWorker:
+        targetTypes.add(WI.TargetType.ServiceWorker);
+        break;
+
+    case WI.DebuggableType.WebPage:
+        targetTypes.add(WI.TargetType.Page);
+        targetTypes.add(WI.TargetType.WebPage);
+        targetTypes.add(WI.TargetType.Worker);
+        break;
+    }
+
+    console.assert(targetTypes.size, "Unknown debuggable type", debuggableType);
+    return targetTypes;
+};

inspector/Base/EventListener.js

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2013, 2014 University of Washington. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.EventListener = class EventListener
+{
+    constructor(thisObject, fireOnce)
+    {
+        this._thisObject = thisObject;
+        this._emitter = null;
+        this._callback = null;
+        this._fireOnce = fireOnce;
+    }
+
+    // Public
+
+    connect(emitter, type, callback, usesCapture)
+    {
+        console.assert(!this._emitter && !this._callback, "EventListener already bound to a callback.", this);
+        console.assert(emitter, `Missing event emitter for event: ${type}.`);
+        console.assert(type, "Missing event type.");
+        console.assert(callback, `Missing callback for event: ${type}.`);
+        var emitterIsValid = emitter && (emitter instanceof WI.Object || emitter instanceof Node || (typeof emitter.addEventListener === "function"));
+        console.assert(emitterIsValid, "Event emitter ", emitter, ` (type: ${type}) is null or does not implement Node or WI.Object.`);
+
+        if (!emitterIsValid || !type || !callback)
+            return;
+
+        this._emitter = emitter;
+        this._type = type;
+        this._usesCapture = !!usesCapture;
+
+        if (emitter instanceof Node)
+            callback = callback.bind(this._thisObject);
+
+        if (this._fireOnce) {
+            var listener = this;
+            this._callback = function() {
+                listener.disconnect();
+                callback.apply(this, arguments);
+            };
+        } else
+            this._callback = callback;
+
+        if (this._emitter instanceof Node)
+            this._emitter.addEventListener(this._type, this._callback, this._usesCapture);
+        else
+            this._emitter.addEventListener(this._type, this._callback, this._thisObject);
+    }
+
+    disconnect()
+    {
+        console.assert(this._emitter && this._callback, "EventListener is not bound to a callback.", this);
+
+        if (!this._emitter || !this._callback)
+            return;
+
+        if (this._emitter instanceof Node)
+            this._emitter.removeEventListener(this._type, this._callback, this._usesCapture);
+        else
+            this._emitter.removeEventListener(this._type, this._callback, this._thisObject);
+
+        if (this._fireOnce)
+            delete this._thisObject;
+        delete this._emitter;
+        delete this._type;
+        delete this._callback;
+    }
+};

inspector/Base/EventListenerSet.js

@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2013, 2014 University of Washington. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// This class supports adding and removing many listeners at once.
+// Add DOM or Inspector event listeners to the set using `register()`.
+// Use `install()` and `uninstall()` to enable or disable all listeners
+// in the set at once.
+
+WI.EventListenerSet = class EventListenerSet
+{
+    constructor(defaultThisObject, name)
+    {
+        this.name = name;
+        this._defaultThisObject = defaultThisObject;
+
+        this._listeners = [];
+        this._installed = false;
+    }
+
+    // Public
+
+    register(emitter, type, callback, thisObject, usesCapture)
+    {
+        console.assert(emitter, `Missing event emitter for event: ${type}.`);
+        console.assert(type, "Missing event type.");
+        console.assert(callback, `Missing callback for event: ${type}.`);
+        var emitterIsValid = emitter && (emitter instanceof WI.Object || emitter instanceof Node || (typeof emitter.addEventListener === "function"));
+        console.assert(emitterIsValid, "Event emitter ", emitter, ` (type: ${type}) is null or does not implement Node or WI.Object.`);
+
+        if (!emitterIsValid || !type || !callback)
+            return;
+
+        this._listeners.push({listener: new WI.EventListener(thisObject || this._defaultThisObject), emitter, type, callback, usesCapture});
+    }
+
+    unregister()
+    {
+        if (this._installed)
+            this.uninstall();
+        this._listeners = [];
+    }
+
+    install()
+    {
+        console.assert(!this._installed, "Already installed listener group: " + this.name);
+        if (this._installed)
+            return;
+
+        this._installed = true;
+
+        for (var data of this._listeners)
+            data.listener.connect(data.emitter, data.type, data.callback, data.usesCapture);
+    }
+
+    uninstall(unregisterListeners)
+    {
+        console.assert(this._installed, "Trying to uninstall listener group " + this.name + ", but it isn't installed.");
+        if (!this._installed)
+            return;
+
+        this._installed = false;
+
+        for (var data of this._listeners)
+            data.listener.disconnect();
+
+        if (unregisterListeners)
+            this._listeners = [];
+    }
+};

inspector/Base/FileUtilities.js

@@ -0,0 +1,275 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.FileUtilities = class FileUtilities {
+    static screenshotString()
+    {
+        let date = new Date;
+        let values = [
+            date.getFullYear(),
+            Number.zeroPad(date.getMonth() + 1, 2),
+            Number.zeroPad(date.getDate(), 2),
+            Number.zeroPad(date.getHours(), 2),
+            Number.zeroPad(date.getMinutes(), 2),
+            Number.zeroPad(date.getSeconds(), 2),
+        ];
+        return WI.UIString("Screen Shot %s-%s-%s at %s.%s.%s").format(...values);
+    }
+
+    static sanitizeFilename(filename)
+    {
+        return filename.replace(/:+/g, "-");
+    }
+
+    static inspectorURLForFilename(filename)
+    {
+        return "web-inspector:///" + encodeURIComponent(FileUtilities.sanitizeFilename(filename));
+    }
+
+    static canSave(saveMode)
+    {
+        console.assert(Object.values(WI.FileUtilities.SaveMode).includes(saveMode), saveMode);
+        return InspectorFrontendHost.canSave(saveMode);
+    }
+
+    static async save(saveMode, fileVariants, forceSaveAs)
+    {
+        console.assert(WI.FileUtilities.canSave(saveMode), saveMode);
+
+        console.assert(fileVariants);
+        if (!fileVariants) {
+            InspectorFrontendHost.beep();
+            return;
+        }
+
+        let isFileVariantsMode = saveMode === WI.FileUtilities.SaveMode.FileVariants;
+        if (isFileVariantsMode)
+            forceSaveAs = true;
+
+        if (typeof fileVariants.customSaveHandler === "function") {
+            fileVariants.customSaveHandler(forceSaveAs);
+            return;
+        }
+
+        if (!isFileVariantsMode && !Array.isArray(fileVariants))
+            fileVariants = [fileVariants];
+
+        console.assert(Array.isArray(fileVariants), fileVariants);
+        if (!Array.isArray(fileVariants)) {
+            InspectorFrontendHost.beep();
+            return;
+        }
+
+        let promises = fileVariants.map((fileVariant) => {
+            let content = fileVariant.content;
+            console.assert(content, fileVariant);
+            if (!content)
+                return null;
+
+            let displayType = fileVariant.displayType || "";
+            console.assert(!isFileVariantsMode || fileVariant.displayType, fileVariant);
+            if (!fileVariant.displayType && isFileVariantsMode)
+                return null;
+
+            let suggestedName = fileVariant.suggestedName;
+            if (!suggestedName) {
+                let url = fileVariant.url || "";
+                suggestedName = parseURL(url).lastPathComponent;
+                if (!suggestedName) {
+                    suggestedName = WI.UIString("Untitled");
+                    let dataURLTypeMatch = /^data:([^;]+)/.exec(url);
+                    if (dataURLTypeMatch) {
+                        let fileExtension = WI.fileExtensionForMIMEType(dataURLTypeMatch[1]);
+                        if (fileExtension)
+                            suggestedName += "." + fileExtension;
+                    }
+                }
+            }
+            let url = WI.FileUtilities.inspectorURLForFilename(suggestedName);
+
+            if (typeof content === "string") {
+                return Promise.resolve({
+                    displayType,
+                    url,
+                    content,
+                    base64Encoded: !!fileVariant.base64Encoded,
+                });
+            }
+
+            let wrappedPromise = new WI.WrappedPromise;
+            let fileReader = new FileReader;
+            fileReader.addEventListener("loadend", () => {
+                wrappedPromise.resolve({
+                    displayType,
+                    url,
+                    content: parseDataURL(fileReader.result).data,
+                    base64Encoded: true,
+                });
+            });
+            fileReader.readAsDataURL(content);
+            return wrappedPromise.promise;
+        });
+        if (promises.includes(null)) {
+            InspectorFrontendHost.beep();
+            return;
+        }
+
+        let saveDatas = await Promise.all(promises);
+
+        console.assert(isFileVariantsMode || saveDatas.length === 1, saveDatas);
+        console.assert(!isFileVariantsMode || new Set(saveDatas.map((saveData) => saveData.displayType)).size === saveDatas.length, saveDatas);
+        console.assert(!isFileVariantsMode || new Set(saveDatas.map((saveData) => WI.urlWithoutExtension(saveData.url))).size === 1, saveDatas);
+
+        InspectorFrontendHost.save(saveDatas, !!forceSaveAs);
+    }
+
+    static import(callback, {multiple} = {})
+    {
+        let inputElement = document.createElement("input");
+        inputElement.type = "file";
+        inputElement.value = null;
+        inputElement.multiple = !!multiple;
+        inputElement.addEventListener("change", (event) => {
+            callback(inputElement.files);
+        });
+
+        inputElement.click();
+
+        // Cache the last used import element so that it doesn't get GCd while the native file
+        // picker is shown, which would prevent the "change" event listener from firing.
+        FileUtilities.importInputElement = inputElement;
+    }
+
+    static importText(callback, options = {})
+    {
+        FileUtilities.import((files) => {
+            FileUtilities.readText(files, callback);
+        }, options);
+    }
+
+    static importJSON(callback, options = {})
+    {
+        FileUtilities.import((files) => {
+            FileUtilities.readJSON(files, callback);
+        }, options);
+    }
+
+    static importData(callback, options = {})
+    {
+        FileUtilities.import((files) => {
+            FileUtilities.readData(files, callback);
+        }, options);
+    }
+
+    static async readText(fileOrList, callback)
+    {
+        await FileUtilities._read(fileOrList, async (file, result) => {
+            await new Promise((resolve, reject) => {
+                let reader = new FileReader;
+                reader.addEventListener("loadend", (event) => {
+                    result.text = reader.result;
+                    resolve(event);
+                });
+                reader.addEventListener("error", reject);
+                reader.readAsText(file);
+            });
+        }, callback);
+    }
+
+    static async readJSON(fileOrList, callback)
+    {
+        await WI.FileUtilities.readText(fileOrList, async (result) => {
+            if (result.text && !result.error) {
+                try {
+                    result.json = JSON.parse(result.text);
+                } catch (e) {
+                    result.error = e;
+                }
+            }
+
+            await callback(result);
+        });
+    }
+
+    static async readData(fileOrList, callback)
+    {
+        await FileUtilities._read(fileOrList, async (file, result) => {
+            await new Promise((resolve, reject) => {
+                let reader = new FileReader;
+                reader.addEventListener("loadend", (event) => {
+                    let {mimeType, base64, data} = parseDataURL(reader.result);
+
+                    // In case no mime type was determined, try to derive one from the file extension.
+                    if (!mimeType || mimeType === "text/plain") {
+                        let extension = WI.fileExtensionForFilename(result.filename);
+                        if (extension)
+                            mimeType = WI.mimeTypeForFileExtension(extension);
+                    }
+
+                    result.mimeType = mimeType;
+                    result.base64Encoded = base64;
+                    result.content = data;
+
+                    resolve(event);
+                });
+                reader.addEventListener("error", reject);
+                reader.readAsDataURL(file);
+            });
+        }, callback);
+    }
+
+    // Private
+
+    static async _read(fileOrList, operation, callback)
+    {
+        console.assert(fileOrList instanceof File || fileOrList instanceof FileList);
+
+        let files = [];
+        if (fileOrList instanceof File)
+            files.push(fileOrList);
+        else if (fileOrList instanceof FileList)
+            files = Array.from(fileOrList);
+
+        for (let file of files) {
+            let result = {
+                filename: file.name,
+            };
+
+            try {
+                await operation(file, result);
+            } catch (e) {
+                result.error = e;
+            }
+
+            await callback(result);
+        }
+    }
+};
+
+// Keep in sync with `InspectorFrontendClient::SaveMode` and `InspectorFrontendHost::SaveMode`.
+WI.FileUtilities.SaveMode = {
+    SingleFile: "single-file",
+    FileVariants: "file-variants",
+};

inspector/Base/HTTPUtilities.js

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.HTTPUtilities = class HTTPUtilities {
+    static statusTextForStatusCode(code)
+    {
+        console.assert(typeof code === "number");
+
+        switch (code) {
+        case 0:   return "OK";
+        case 100: return "Continue";
+        case 101: return "Switching Protocols";
+        case 200: return "OK";
+        case 201: return "Created";
+        case 202: return "Accepted";
+        case 203: return "Non-Authoritative Information";
+        case 204: return "No Content";
+        case 205: return "Reset Content";
+        case 206: return "Partial Content";
+        case 207: return "Multi-Status";
+        case 300: return "Multiple Choices";
+        case 301: return "Moved Permanently";
+        case 302: return "Found";
+        case 303: return "See Other";
+        case 304: return "Not Modified";
+        case 305: return "Use Proxy";
+        case 307: return "Temporary Redirect";
+        case 308: return "Permanent Redirect";
+        case 400: return "Bad Request";
+        case 401: return "Unauthorized";
+        case 402: return "Payment Required";
+        case 403: return "Forbidden";
+        case 404: return "Not Found";
+        case 405: return "Method Not Allowed";
+        case 406: return "Not Acceptable";
+        case 407: return "Proxy Authentication Required";
+        case 408: return "Request Time-out";
+        case 409: return "Conflict";
+        case 410: return "Gone";
+        case 411: return "Length Required";
+        case 412: return "Precondition Failed";
+        case 413: return "Request Entity Too Large";
+        case 414: return "Request-URI Too Large";
+        case 415: return "Unsupported Media Type";
+        case 416: return "Requested range not satisfiable";
+        case 417: return "Expectation Failed";
+        case 500: return "Internal Server Error";
+        case 501: return "Not Implemented";
+        case 502: return "Bad Gateway";
+        case 503: return "Service Unavailable";
+        case 504: return "Gateway Time-out";
+        case 505: return "HTTP Version not supported";
+        }
+
+        if (code < 200)
+            return "Continue";
+        if (code < 300)
+            return "OK";
+        if (code < 400)
+            return "Multiple Choices";
+        if (code < 500)
+            return "Bad Request";
+
+        return "Internal Server Error";
+    }
+};
+
+WI.HTTPUtilities.RequestMethod = {
+    CONNECT: "CONNECT",
+    DELETE: "DELETE",
+    GET: "GET",
+    HEAD: "HEAD",
+    OPTIONS: "OPTIONS",
+    PATCH: "PATCH",
+    POST: "POST",
+    PUT: "PUT",
+    TRACE: "TRACE",
+};
+
+WI.HTTPUtilities.RequestMethodsWithBody = new Set([
+    WI.HTTPUtilities.RequestMethod.DELETE,
+    WI.HTTPUtilities.RequestMethod.PATCH,
+    WI.HTTPUtilities.RequestMethod.POST,
+    WI.HTTPUtilities.RequestMethod.PUT,
+]);

inspector/Base/IDLExtensions.js

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2022 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// The following should only be used for response local override file mapping.
+
+Object.defineProperty(File.prototype, "getPath", {
+    value() {
+        return InspectorFrontendHost.getPath(this);
+    },
+});
+
+// The following should only be used for rendering (and interacting with) canvas 2D recordings.
+
+Object.defineProperty(CanvasRenderingContext2D.prototype, "currentX", {
+    get() {
+        return InspectorFrontendHost.getCurrentX(this);
+    },
+});
+
+Object.defineProperty(CanvasRenderingContext2D.prototype, "currentY", {
+    get() {
+        return InspectorFrontendHost.getCurrentY(this);
+    },
+});
+
+Object.defineProperty(CanvasRenderingContext2D.prototype, "getPath", {
+    value() {
+        return InspectorFrontendHost.getPath(this);
+    },
+});
+
+Object.defineProperty(CanvasRenderingContext2D.prototype, "setPath", {
+    value(path) {
+        return InspectorFrontendHost.setPath(this, path);
+    },
+});

inspector/Base/ImageUtilities.js

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2013, 2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2017 Devin Rousso <webkit@devinrousso.com>. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ImageUtilities = class ImageUtilities {
+    static useSVGSymbol(url, className, title)
+    {
+        const svgNamespace = "http://www.w3.org/2000/svg";
+        const xlinkNamespace = "http://www.w3.org/1999/xlink";
+
+        let svgElement = document.createElementNS(svgNamespace, "svg");
+        svgElement.style.width = "100%";
+        svgElement.style.height = "100%";
+
+        // URL must contain a fragment reference to a graphical element, like a symbol. If none is given
+        // append #root which all of our SVGs have on the top level <svg> element.
+        if (!url.includes("#"))
+            url += "#root";
+
+        let useElement = document.createElementNS(svgNamespace, "use");
+        useElement.setAttributeNS(xlinkNamespace, "xlink:href", url);
+        svgElement.appendChild(useElement);
+
+        let wrapper = document.createElement("div");
+        wrapper.appendChild(svgElement);
+
+        if (className)
+            wrapper.className = className;
+        if (title)
+            wrapper.title = title;
+
+        return wrapper;
+    }
+
+    static promisifyLoad(src)
+    {
+        return new Promise((resolve, reject) => {
+            let image = new Image;
+            let resolveWithImage = () => { resolve(image); };
+            image.addEventListener("load", resolveWithImage);
+            image.addEventListener("error", resolveWithImage);
+            image.src = src;
+        });
+    }
+
+    static scratchCanvasContext2D(callback)
+    {
+        if (!WI.ImageUtilities._scratchContext2D)
+            WI.ImageUtilities._scratchContext2D = document.createElement("canvas").getContext("2d");
+
+        let context = WI.ImageUtilities._scratchContext2D;
+
+        context.clearRect(0, 0, context.canvas.width, context.canvas.height);
+        context.save();
+        callback(context);
+        context.restore();
+    }
+
+    static imageFromImageBitmap(data)
+    {
+        console.assert(data instanceof ImageBitmap);
+
+        let image = null;
+        WI.ImageUtilities.scratchCanvasContext2D((context) => {
+            context.canvas.width = data.width;
+            context.canvas.height = data.height;
+            context.drawImage(data, 0, 0);
+
+            image = new Image;
+            image.src = context.canvas.toDataURL();
+        });
+        return image;
+    }
+
+    static imageFromImageData(data)
+    {
+        console.assert(data instanceof ImageData);
+
+        let image = null;
+        WI.ImageUtilities.scratchCanvasContext2D((context) => {
+            context.canvas.width = data.width;
+            context.canvas.height = data.height;
+            context.putImageData(data, 0, 0);
+
+            image = new Image;
+            image.src = context.canvas.toDataURL();
+        });
+        return image;
+    }
+
+    static imageFromCanvasGradient(gradient, width, height)
+    {
+        console.assert(gradient instanceof CanvasGradient);
+
+        let image = null;
+        WI.ImageUtilities.scratchCanvasContext2D((context) => {
+            context.canvas.width = width;
+            context.canvas.height = height;
+            context.fillStyle = gradient;
+            context.fillRect(0, 0, width, height);
+
+            image = new Image;
+            image.src = context.canvas.toDataURL();
+        });
+        return image;
+    }
+};
+
+WI.ImageUtilities._scratchContext2D = null;

inspector/Base/IterableWeakSet.js

@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2022 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class IterableWeakSet
+{
+    constructor(items = [])
+    {
+        this._wrappers = new Set;
+        this._wrapperForItem = new WeakMap;
+
+        for (let item of items)
+            this.add(item);
+    }
+
+    // Public
+
+    get size()
+    {
+        let size = 0;
+        for (let wrapper of this._wrappers) {
+            if (wrapper.deref())
+                ++size;
+        }
+        return size;
+    }
+
+    has(item)
+    {
+        let result = this._wrapperForItem.has(item);
+        console.assert(Array.from(this._wrappers).some((wrapper) => wrapper.deref() === item) === result, this, item);
+        return result;
+    }
+
+    add(item)
+    {
+        console.assert(typeof item === "object", item);
+        console.assert(item !== null, item);
+
+        if (this.has(item))
+            return;
+
+        let wrapper = new WeakRef(item);
+        this._wrappers.add(wrapper);
+        this._wrapperForItem.set(item, wrapper);
+        this._finalizationRegistry.register(item, {weakThis: new WeakRef(this), wrapper}, wrapper);
+    }
+
+    delete(item)
+    {
+        return !!this.take(item);
+    }
+
+    take(item)
+    {
+        let wrapper = this._wrapperForItem.get(item);
+        if (!wrapper)
+            return undefined;
+
+        let itemDeleted = this._wrapperForItem.delete(item);
+        console.assert(itemDeleted, this, item);
+
+        let wrapperDeleted = this._wrappers.delete(wrapper);
+        console.assert(wrapperDeleted, this, item);
+
+        this._finalizationRegistry.unregister(wrapper);
+
+        console.assert(wrapper.deref() === item, this, item);
+        return item;
+    }
+
+    clear()
+    {
+        for (let wrapper of this._wrappers) {
+            this._wrapperForItem.delete(wrapper);
+            this._finalizationRegistry.unregister(wrapper);
+        }
+
+        this._wrappers.clear();
+    }
+
+    keys()
+    {
+        return this.values();
+    }
+
+    *values()
+    {
+        for (let wrapper of this._wrappers) {
+            let item = wrapper.deref();
+            console.assert(!item === !this._wrapperForItem.has(item), this, item);
+            if (item)
+                yield item;
+        }
+    }
+
+    [Symbol.iterator]()
+    {
+        return this.values();
+    }
+
+    copy()
+    {
+        return new IterableWeakSet(this.toJSON());
+    }
+
+    toJSON()
+    {
+        return Array.from(this);
+    }
+
+    // Private
+
+    get _finalizationRegistry()
+    {
+        return IterableWeakSet._finalizationRegistry ??= new FinalizationRegistry(function(heldValue) {
+            heldValue.weakThis.deref()?._wrappers.delete(heldValue.wrapper);
+        });
+    }
+}

inspector/Base/LinkedList.js

@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class LinkedList
+{
+    constructor()
+    {
+        this.head = new LinkedListNode;
+        this.head.next = this.head.prev = this.head;
+        this.length = 0;
+    }
+
+    clear()
+    {
+        this.head.next = this.head.prev = this.head;
+        this.length = 0;
+    }
+
+    get last()
+    {
+        return this.head.prev;
+    }
+
+    push(item)
+    {
+        let newNode = new LinkedListNode(item);
+        let last = this.last;
+        let head = this.head;
+
+        last.next = newNode;
+        newNode.next = head;
+        head.prev = newNode;
+        newNode.prev = last;
+
+        this.length++;
+
+        return newNode;
+    }
+
+    remove(node)
+    {
+        if (!node)
+            return false;
+
+        node.prev.next = node.next;
+        node.next.prev = node.prev;
+
+        this.length--;
+        return true;
+    }
+
+    forEach(callback)
+    {
+        let node = this.head;
+        for (let i = 0, length = this.length; i < length; i++) {
+            node = node.next;
+            let returnValue = callback(node.value, i);
+            if (returnValue === false)
+                return;
+        }
+    }
+
+    toArray()
+    {
+        let node = this.head;
+        let i = this.length;
+        let result = new Array(i);
+        while (i--) {
+            node = node.prev;
+            result[i] = node.value;
+        }
+        return result;
+    }
+
+    toJSON()
+    {
+        return this.toArray();
+    }
+}
+
+
+class LinkedListNode
+{
+    constructor(value)
+    {
+        this.value = value;
+        this.prev = null;
+        this.next = null;
+    }
+}

inspector/Base/ListMultimap.js

@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class ListMultimap
+{
+    constructor()
+    {
+        this._insertionOrderedEntries = new LinkedList;
+        this._keyMap = new Map;
+    }
+
+    get size()
+    {
+        return this._insertionOrderedEntries.length;
+    }
+
+    add(key, value)
+    {
+        let nodeMap = this._keyMap.get(key);
+        if (!nodeMap) {
+            nodeMap = new Map;
+            this._keyMap.set(key, nodeMap);
+        }
+
+        let node = nodeMap.get(value);
+        if (!node) {
+            node = this._insertionOrderedEntries.push([key, value]);
+            nodeMap.set(value, node);
+        }
+
+        return this;
+    }
+
+    delete(key, value)
+    {
+        let nodeMap = this._keyMap.get(key);
+        if (!nodeMap)
+            return false;
+
+        let node = nodeMap.get(value);
+        if (!node)
+            return false;
+
+        nodeMap.delete(value);
+        this._insertionOrderedEntries.remove(node);
+        return true;
+    }
+
+    deleteAll(key)
+    {
+        let nodeMap = this._keyMap.get(key);
+        if (!nodeMap)
+            return false;
+
+        let list = this._insertionOrderedEntries;
+        let didDelete = false;
+        nodeMap.forEach(function(node) {
+            list.remove(node);
+            didDelete = true;
+        });
+
+        this._keyMap.delete(key);
+        return didDelete;
+    }
+
+    has(key, value)
+    {
+        let nodeMap = this._keyMap.get(key);
+        if (!nodeMap)
+            return false;
+
+        return nodeMap.has(value);
+    }
+
+    clear()
+    {
+        this._keyMap = new Map;
+        this._insertionOrderedEntries = new LinkedList;
+    }
+
+    forEach(callback)
+    {
+        this._insertionOrderedEntries.forEach(callback);
+    }
+
+    toArray()
+    {
+        return this._insertionOrderedEntries.toArray();
+    }
+
+    toJSON()
+    {
+        return this.toArray();
+    }
+}

inspector/Base/LoadLocalizedStrings.js

@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+(function() {
+    if (WI.dontLocalizeUserInterface)
+        return;
+
+    let localizedStringsURL = InspectorFrontendHost.localizedStringsURL;
+    console.assert(localizedStringsURL);
+    if (localizedStringsURL)
+        document.write("<script src=\"" + localizedStringsURL + "\"></script>");
+})();
+
+WI.unlocalizedString = function(string)
+{
+    // Intentionally do nothing, since this is for engineering builds
+    // (such as in Debug UI) or in text that is standardized in English.
+    // For example, CSS property names and values are never localized.
+    return string;
+};
+
+WI.UIString = function(string, key, comment)
+{
+    "use strict";
+
+    if (WI.dontLocalizeUserInterface)
+        return string;
+
+    // UIString(string, comment)
+    if (arguments.length === 2) {
+        comment = key;
+        key = undefined;
+    }
+
+    key = key || string;
+
+    if (window.localizedStrings && key in window.localizedStrings)
+        return window.localizedStrings[key];
+
+    if (!window.localizedStrings)
+        console.error(`Attempted to load localized string "${key}" before localizedStrings was initialized.`, comment);
+
+    if (!this._missingLocalizedStrings)
+        this._missingLocalizedStrings = {};
+
+    if (!(key in this._missingLocalizedStrings)) {
+        console.error(`Localized string "${key}" was not found.`, comment);
+        this._missingLocalizedStrings[key] = true;
+    }
+
+    return "LOCALIZED STRING NOT FOUND";
+};
+
+WI.repeatedUIString = {};
+
+WI.repeatedUIString.timelineRecordLayout = function() {
+    return WI.UIString("Layout", "Layout @ Timeline record", "Layout phase timeline records");
+};
+
+WI.repeatedUIString.timelineRecordPaint = function() {
+    return WI.UIString("Paint", "Paint @ Timeline record", "Paint (render) phase timeline records");
+};
+
+WI.repeatedUIString.timelineRecordComposite = function() {
+    return WI.UIString("Composite", "Composite @ Timeline record", "Composite phase timeline records, where graphic layers are combined");
+};
+
+WI.repeatedUIString.debuggerStatements = function() {
+    return WI.UIString("Debugger Statements", "Debugger Statements @ JavaScript Breakpoint", "Break (pause) on debugger statements");
+};
+
+WI.repeatedUIString.allExceptions = function() {
+    return WI.UIString("All Exceptions", "All Exceptions @ JavaScript Breakpoint", "Break (pause) on all exceptions");
+};
+
+WI.repeatedUIString.uncaughtExceptions = function() {
+    return WI.UIString("Uncaught Exceptions", "Uncaught Exceptions @ JavaScript Breakpoint", "Break (pause) on uncaught (unhandled) exceptions");
+};
+
+WI.repeatedUIString.assertionFailures = function() {
+    return WI.UIString("Assertion Failures", "Assertion Failures @ JavaScript Breakpoint", "Break (pause) when console.assert() fails");
+};
+
+WI.repeatedUIString.allMicrotasks = function() {
+    return WI.UIString("All Microtasks", "All Microtasks @ JavaScript Breakpoint", "Break (pause) on all microtasks");
+};
+
+WI.repeatedUIString.allAnimationFrames = function() {
+    return WI.UIString("All Animation Frames", "All Animation Frames @ Event Breakpoint", "Break (pause) on All animation frames");
+};
+
+WI.repeatedUIString.allIntervals = function() {
+    return WI.UIString("All Intervals", "All Intervals @ Event Breakpoint", "Break (pause) on all intervals");
+};
+
+WI.repeatedUIString.allEvents = function() {
+    return WI.UIString("All Events", "All Events @ Event Breakpoint", "Break (pause) on all events");
+};
+
+WI.repeatedUIString.allTimeouts = function() {
+    return WI.UIString("All Timeouts", "All Timeouts @ Event Breakpoint", "Break (pause) on all timeouts");
+};
+
+WI.repeatedUIString.allRequests = function() {
+    return WI.UIString("All Requests", "A submenu item of 'Break on' that breaks (pauses) before all network requests");
+};
+
+WI.repeatedUIString.fetch = function() {
+    return WI.UIString("Fetch", "Resource loaded via 'fetch' method");
+};
+
+WI.repeatedUIString.revealInDOMTree = function() {
+    return WI.UIString("Reveal in DOM Tree", "Open Elements tab and select this node in DOM tree");
+};
+
+WI.repeatedUIString.showTransparencyGridTooltip = function() {
+    return WI.UIString("Show transparency grid", "Show transparency grid (tooltip)", "Tooltip for showing the checkered transparency grid under images and canvases")
+};

inspector/Base/MIMETypeUtilities.js

@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.fileExtensionForFilename = function(filename)
+{
+    if (!filename)
+        return null;
+
+    let index = filename.lastIndexOf(".");
+    if (index === -1)
+        return null;
+
+    if (index === filename.length - 1)
+        return null;
+
+    return filename.substr(index + 1);
+};
+
+WI.fileExtensionForURL = function(url)
+{
+    let lastPathComponent = parseURL(url).lastPathComponent;
+    return WI.fileExtensionForFilename(lastPathComponent);
+};
+
+WI.mimeTypeForFileExtension = function(extension)
+{
+    const extensionToMIMEType = {
+        // Document types.
+        "html": "text/html",
+        "xhtml": "application/xhtml+xml",
+        "xml": "text/xml",
+
+        // Script types.
+        "js": "text/javascript",
+        "mjs": "text/javascript",
+        "json": "application/json",
+        "clj": "text/x-clojure",
+        "coffee": "text/x-coffeescript",
+        "ls": "text/x-livescript",
+        "ts": "text/typescript",
+        "ps": "application/postscript",
+        "jsx": "text/jsx",
+
+        // Stylesheet types.
+        "css": "text/css",
+        "less": "text/x-less",
+        "sass": "text/x-sass",
+        "scss": "text/x-scss",
+
+        // Image types.
+        "avif": "image/avif",
+        "bmp": "image/bmp",
+        "gif": "image/gif",
+        "ico": "image/x-icon",
+        "jp2": "image/jp2",
+        "jpeg": "image/jpeg",
+        "jpg": "image/jpeg",
+        "jxl": "image/jxl",
+        "pdf": "application/pdf",
+        "png": "image/png",
+        "tif": "image/tiff",
+        "tiff": "image/tiff",
+        "webp": "image/webp",
+        "xbm": "image/x-xbitmap",
+
+        "ogx": "application/ogg",
+        "ogg": "audio/ogg",
+        "oga": "audio/ogg",
+        "ogv": "video/ogg",
+
+        // Annodex
+        "anx": "application/annodex",
+        "axa": "audio/annodex",
+        "axv": "video/annodex",
+        "spx": "audio/speex",
+
+        // WebM
+        "webm": "video/webm",
+
+        // MPEG
+        "m1a": "audio/mpeg",
+        "m2a": "audio/mpeg",
+        "mpg": "video/mpeg",
+        "m15": "video/mpeg",
+        "m1s": "video/mpeg",
+        "m1v": "video/mpeg",
+        "m75": "video/mpeg",
+        "mpa": "video/mpeg",
+        "mpeg": "video/mpeg",
+        "mpm": "video/mpeg",
+        "mpv": "video/mpeg",
+
+        // MPEG playlist
+        "m3u8": "application/x-mpegurl",
+        "m3url": "audio/x-mpegurl",
+        "m3u": "audio/x-mpegurl",
+
+        // MPEG-4
+        "m4v": "video/x-m4v",
+        "m4a": "audio/x-m4a",
+        "m4b": "audio/x-m4b",
+        "m4p": "audio/x-m4p",
+
+        // MP3
+        "mp3": "audio/mp3",
+
+        // MPEG-2
+        "mp2": "video/x-mpeg2",
+        "vob": "video/mpeg2",
+        "mod": "video/mpeg2",
+        "m2ts": "video/m2ts",
+        "m2t": "video/x-m2ts",
+
+        // 3GP/3GP2
+        "3gpp": "audio/3gpp",
+        "3g2": "audio/3gpp2",
+        "amc": "application/x-mpeg",
+
+        // AAC
+        "aac": "audio/aac",
+        "adts": "audio/aac",
+        "m4r": "audio/x-aac",
+
+        // CoreAudio File
+        "caf": "audio/x-caf",
+        "gsm": "audio/x-gsm",
+
+        // ADPCM
+        "wav": "audio/x-wav",
+
+        // Text Track
+        "vtt": "text/vtt",
+
+        // Font
+        "woff": "font/woff",
+        "woff2": "font/woff2",
+        "otf": "font/otf",
+        "ttf": "font/ttf",
+        "sfnt": "font/sfnt",
+
+        // Miscellaneous types.
+        "svg": "image/svg+xml",
+        "txt": "text/plain",
+        "xsl": "text/xsl"
+    };
+
+    return extensionToMIMEType[extension] || null;
+};
+
+WI.fileExtensionForMIMEType = function(mimeType)
+{
+    if (!mimeType)
+        return null;
+
+    const mimeTypeToExtension = {
+        // Document types.
+        "text/html": "html",
+        "application/xhtml+xml": "xhtml",
+        "application/xml": "xml",
+        "text/xml": "xml",
+
+        // Script types.
+        "application/ecmascript": "js",
+        "application/javascript": "js",
+        "application/x-ecmascript": "js",
+        "application/x-javascript": "js",
+        "text/ecmascript": "js",
+        "text/javascript": "js",
+        "text/javascript1.0": "js",
+        "text/javascript1.1": "js",
+        "text/javascript1.2": "js",
+        "text/javascript1.3": "js",
+        "text/javascript1.4": "js",
+        "text/javascript1.5": "js",
+        "text/jscript": "js",
+        "text/x-ecmascript": "js",
+        "text/x-javascript": "js",
+        "application/json": "json",
+        "text/x-clojure": "clj",
+        "text/x-coffeescript": "coffee",
+        "text/livescript": "ls",
+        "text/x-livescript": "ls",
+        "text/typescript": "ts",
+        "application/postscript": "ps",
+        "text/jsx": "jsx",
+
+        // Stylesheet types.
+        "text/css": "css",
+        "text/x-less": "less",
+        "text/x-sass": "sass",
+        "text/x-scss": "scss",
+
+        // Image types.
+        "image/avif": "avif",
+        "image/bmp": "bmp",
+        "image/gif": "gif",
+        "image/vnd.microsoft.icon": "ico",
+        "image/x-icon": "ico",
+        "image/jp2": "jp2",
+        "image/jpeg": "jpg",
+        "image/jxl": "jxl",
+        "application/pdf": "pdf",
+        "text/pdf": "pdf",
+        "image/png": "png",
+        "image/tiff": "tiff",
+        "image/webp": "webp",
+        "image/x-xbitmap": "xbm",
+
+        // Ogg
+        "application/ogg": "ogx",
+        "audio/ogg": "ogg",
+
+        // Annodex
+        "application/annodex": "anx",
+        "audio/annodex": "axa",
+        "video/annodex": "axv",
+        "audio/speex": "spx",
+
+        // WebM
+        "video/webm": "webm",
+        "audio/webm": "webm",
+
+        // MPEG
+        "video/mpeg": "mpeg",
+
+        // MPEG playlist
+        "application/vnd.apple.mpegurl": "m3u8",
+        "application/mpegurl": "m3u8",
+        "application/x-mpegurl": "m3u8",
+        "audio/mpegurl": "m3u",
+        "audio/x-mpegurl": "m3u",
+
+        // MPEG-4
+        "video/x-m4v": "m4v",
+        "audio/x-m4a": "m4a",
+        "audio/x-m4b": "m4b",
+        "audio/x-m4p": "m4p",
+        "audio/mp4": "m4a",
+
+        // MP3
+        "audio/mp3": "mp3",
+        "audio/x-mp3": "mp3",
+        "audio/x-mpeg": "mp3",
+
+        // MPEG-2
+        "video/x-mpeg2": "mp2",
+        "video/mpeg2": "vob",
+        "video/m2ts": "m2ts",
+        "video/x-m2ts": "m2t",
+
+        // 3GP/3GP2
+        "audio/3gpp": "3gpp",
+        "audio/3gpp2": "3g2",
+        "application/x-mpeg": "amc",
+
+        // AAC
+        "audio/aac": "aac",
+        "audio/x-aac": "m4r",
+
+        // CoreAudio File
+        "audio/x-caf": "caf",
+        "audio/x-gsm": "gsm",
+
+        // ADPCM
+        "audio/x-wav": "wav",
+        "audio/vnd.wave": "wav",
+
+        // Text Track
+        "text/vtt": "vtt",
+
+        // Font
+        "font/woff": "woff",
+        "font/woff2": "woff2",
+        "font/otf": "otf",
+        "font/ttf": "ttf",
+        "font/sfnt": "sfnt",
+
+        // Miscellaneous types.
+        "image/svg+xml": "svg",
+        "text/plain": "txt",
+        "text/xsl": "xsl",
+    };
+
+    let extension = mimeTypeToExtension[mimeType];
+    if (extension)
+        return extension;
+
+    if (mimeType.endsWith("+json"))
+        return "json";
+    if (mimeType.endsWith("+xml"))
+        return "xml";
+
+    return null;
+};
+
+WI.shouldTreatMIMETypeAsText = function(mimeType)
+{
+    if (!mimeType)
+        return false;
+
+    if (mimeType.startsWith("text/"))
+        return true;
+
+    if (mimeType.endsWith("+json") || mimeType.endsWith("+xml"))
+        return true;
+
+    let extension = WI.fileExtensionForMIMEType(mimeType);
+    if (extension === "xml")
+        return true;
+
+    // Various script and JSON mime types.
+    if (extension === "js" || extension === "json")
+        return true;
+
+    // Various media text mime types.
+    if (extension === "m3u8" || extension === "m3u")
+        return true;
+
+    if (mimeType.startsWith("application/"))
+        return mimeType.endsWith("script") || mimeType.endsWith("json") || mimeType.endsWith("xml");
+
+    return false;
+};

inspector/Base/Multimap.js

@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2018-2020 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+class Multimap
+{
+    constructor(items = [])
+    {
+        this._map = new Map;
+
+        for (let [key, value] of items)
+            this.add(key, value);
+    }
+
+    // Public
+
+    get size()
+    {
+        return this._map.size;
+    }
+
+    has(key, value)
+    {
+        let valueSet = this._map.get(key);
+        if (!valueSet)
+            return false;
+        return value === undefined || valueSet.has(value);
+    }
+
+    get(key)
+    {
+        return this._map.get(key);
+    }
+
+    add(key, value)
+    {
+        let valueSet = this._map.get(key);
+        if (!valueSet) {
+            valueSet = new Set;
+            this._map.set(key, valueSet);
+        }
+        valueSet.add(value);
+
+        return this;
+    }
+
+    delete(key, value)
+    {
+        // Allow an entire key to be removed by not passing a value.
+        if (arguments.length === 1)
+            return this._map.delete(key);
+
+        let valueSet = this._map.get(key);
+        if (!valueSet)
+            return false;
+
+        let deleted = valueSet.delete(value);
+
+        if (!valueSet.size)
+            this._map.delete(key);
+
+        return deleted;
+    }
+
+    take(key, value)
+    {
+        // Allow an entire key to be removed by not passing a value.
+        if (arguments.length === 1)
+            return this._map.take(key);
+
+        let valueSet = this._map.get(key);
+        if (!valueSet)
+            return undefined;
+
+        let result = valueSet.take(value);
+        if (!valueSet.size)
+            this._map.delete(key);
+        return result;
+    }
+
+    clear()
+    {
+        this._map.clear();
+    }
+
+    keys()
+    {
+        return this._map.keys();
+    }
+
+    *values()
+    {
+        for (let valueSet of this._map.values()) {
+            for (let value of valueSet)
+                yield value;
+        }
+    }
+
+    sets()
+    {
+        return this._map.entries();
+    }
+
+    *[Symbol.iterator]()
+    {
+        for (let [key, valueSet] of this._map) {
+            for (let value of valueSet)
+                yield [key, value];
+        }
+    }
+
+    copy()
+    {
+        return new Multimap(this.toJSON());
+    }
+
+    toJSON()
+    {
+        return Array.from(this);
+    }
+}

inspector/Base/Object.js

@@ -0,0 +1,222 @@
+/*
+ * Copyright (C) 2008, 2013 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.Object = class WebInspectorObject
+{
+    constructor()
+    {
+        this._listeners = null;
+    }
+
+    // Static
+
+    static addEventListener(eventType, listener, thisObject)
+    {
+        console.assert(typeof eventType === "string", this, eventType, listener, thisObject);
+        console.assert(typeof listener === "function", this, eventType, listener, thisObject);
+        console.assert(typeof thisObject === "object" || window.InspectorTest || window.ProtocolTest, this, eventType, listener, thisObject);
+
+        thisObject ??= this;
+
+        let data = {
+            listener,
+            thisObjectWeakRef: new WeakRef(thisObject),
+        };
+
+        WI.Object._listenerThisObjectFinalizationRegistry.register(thisObject, {eventTargetWeakRef: new WeakRef(this), eventType, data}, data);
+
+        this._listeners ??= new Multimap;
+        this._listeners.add(eventType, data);
+
+        console.assert(Array.from(this._listeners.get(eventType)).filter((item) => item.listener === listener && item.thisObjectWeakRef.deref() === thisObject).length === 1, this, eventType, listener, thisObject);
+
+        return listener;
+    }
+
+    static singleFireEventListener(eventType, listener, thisObject)
+    {
+        let eventTargetWeakRef = new WeakRef(this);
+        return this.addEventListener(eventType, function wrappedCallback() {
+            eventTargetWeakRef.deref()?.removeEventListener(eventType, wrappedCallback, this);
+            listener.apply(this, arguments);
+        }, thisObject);
+    }
+
+    static awaitEvent(eventType, thisObject)
+    {
+        return new Promise((resolve, reject) => {
+            this.singleFireEventListener(eventType, resolve, thisObject);
+        });
+    }
+
+    static removeEventListener(eventType, listener, thisObject)
+    {
+        console.assert(this._listeners, this, eventType, listener, thisObject);
+        console.assert(typeof eventType === "string", this, eventType, listener, thisObject);
+        console.assert(typeof listener === "function", this, eventType, listener, thisObject);
+        console.assert(typeof thisObject === "object" || window.InspectorTest || window.ProtocolTest, this, eventType, listener, thisObject);
+
+        if (!this._listeners)
+            return;
+
+        thisObject ??= this;
+
+        let listenersForEventType = this._listeners.get(eventType);
+        console.assert(listenersForEventType, this, eventType, listener, thisObject);
+        if (!listenersForEventType)
+            return;
+
+        let didDelete = false;
+        for (let data of listenersForEventType) {
+            let unwrapped = data.thisObjectWeakRef.deref();
+            if (!unwrapped || unwrapped !== thisObject || data.listener !== listener)
+                continue;
+
+            if (this._listeners.delete(eventType, data))
+                didDelete = true;
+            WI.Object._listenerThisObjectFinalizationRegistry.unregister(data);
+        }
+        console.assert(didDelete, this, eventType, listener, thisObject);
+    }
+
+    // Public
+
+    addEventListener() { return WI.Object.addEventListener.apply(this, arguments); }
+    singleFireEventListener() { return WI.Object.singleFireEventListener.apply(this, arguments); }
+    awaitEvent() { return WI.Object.awaitEvent.apply(this, arguments); }
+    removeEventListener() { return WI.Object.removeEventListener.apply(this, arguments); }
+
+    dispatchEventToListeners(eventType, eventData)
+    {
+        let event = new WI.Event(this, eventType, eventData);
+
+        function dispatch(object)
+        {
+            if (!object || event._stoppedPropagation)
+                return;
+
+            let listeners = object._listeners;
+            if (!listeners || !object.hasOwnProperty("_listeners") || !listeners.size)
+                return;
+
+            let listenersForEventType = listeners.get(eventType);
+            if (!listenersForEventType)
+                return;
+
+            // Copy the set of listeners so we don't have to worry about mutating while iterating.
+            for (let data of Array.from(listenersForEventType)) {
+                let unwrapped = data.thisObjectWeakRef.deref();
+                if (!unwrapped)
+                    continue;
+
+                data.listener.call(unwrapped, event);
+
+                if (event._stoppedPropagation)
+                    break;
+            }
+        }
+
+        // Dispatch to listeners of this specific object.
+        dispatch(this);
+
+        // Allow propagation again so listeners on the constructor always have a crack at the event.
+        event._stoppedPropagation = false;
+
+        // Dispatch to listeners on all constructors up the prototype chain, including the immediate constructor.
+        let constructor = this.constructor;
+        while (constructor) {
+            dispatch(constructor);
+
+            if (!constructor.prototype.__proto__)
+                break;
+
+            constructor = constructor.prototype.__proto__.constructor;
+        }
+
+        return event.defaultPrevented;
+    }
+
+    // Test
+
+    static hasEventListeners(eventType)
+    {
+        console.assert(window.InspectorTest || window.ProtocolTest);
+        return this._listeners?.has(eventType);
+    }
+
+    static activelyListeningObjectsWithPrototype(proto)
+    {
+        console.assert(window.InspectorTest || window.ProtocolTest);
+        let results = new Set;
+        if (this._listeners) {
+            for (let data of this._listeners.values()) {
+                let unwrapped = data.thisObjectWeakRef.deref();
+                if (unwrapped instanceof proto)
+                    results.add(unwrapped);
+            }
+        }
+        return results;
+    }
+
+    hasEventListeners() { return WI.Object.hasEventListeners.apply(this, arguments); }
+    activelyListeningObjectsWithPrototype() { return WI.Object.activelyListeningObjectsWithPrototype.apply(this, arguments); }
+};
+
+WI.Object._listenerThisObjectFinalizationRegistry = new FinalizationRegistry((heldValue) => {
+    heldValue.eventTargetWeakRef.deref()?._listeners.delete(heldValue.eventType, heldValue.data);
+});
+
+WI.Event = class Event
+{
+    constructor(target, type, data)
+    {
+        this.target = target;
+        this.type = type;
+        this.data = data;
+        this.defaultPrevented = false;
+        this._stoppedPropagation = false;
+    }
+
+    stopPropagation()
+    {
+        this._stoppedPropagation = true;
+    }
+
+    preventDefault()
+    {
+        this.defaultPrevented = true;
+    }
+};
+
+WI.notifications = new WI.Object;
+
+WI.Notification = {
+    GlobalModifierKeysDidChange: "global-modifiers-did-change",
+    PageArchiveStarted: "page-archive-started",
+    PageArchiveEnded: "page-archive-ended",
+    ExtraDomainsActivated: "extra-domains-activated", // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+    VisibilityStateDidChange: "visibility-state-did-change",
+    TransitionPageTarget: "transition-page-target",
+};

inspector/Base/ObjectStore.js

@@ -0,0 +1,284 @@
+/*
+ * Copyright (C) 2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ObjectStore = class ObjectStore
+{
+    constructor(name, options = {})
+    {
+        this._name = name;
+        this._options = options;
+    }
+
+    // Static
+
+    static supported()
+    {
+        return (!window.InspectorTest || WI.ObjectStore.__testObjectStore) && window.indexedDB;
+    }
+
+    static async reset()
+    {
+        if (WI.ObjectStore._database)
+            WI.ObjectStore._database.close();
+
+        await window.indexedDB.deleteDatabase(ObjectStore._databaseName);
+    }
+
+    static get _databaseName()
+    {
+        let inspectionLevel = InspectorFrontendHost ? InspectorFrontendHost.inspectionLevel : 1;
+        let levelString = (inspectionLevel > 1) ? "-" + inspectionLevel : "";
+        return "com.apple.WebInspector" + levelString;
+    }
+
+    static _open(callback)
+    {
+        if (WI.ObjectStore._database) {
+            callback(WI.ObjectStore._database);
+            return;
+        }
+
+        if (Array.isArray(WI.ObjectStore._databaseCallbacks)) {
+            WI.ObjectStore._databaseCallbacks.push(callback);
+            return;
+        }
+
+        WI.ObjectStore._databaseCallbacks = [callback];
+
+        const version = 8; // Increment this for every edit to `WI.objectStores`.
+
+        let databaseRequest = window.indexedDB.open(WI.ObjectStore._databaseName, version);
+        databaseRequest.addEventListener("upgradeneeded", (event) => {
+            let database = databaseRequest.result;
+
+            let objectStores = Object.values(WI.objectStores);
+            if (WI.ObjectStore.__testObjectStore)
+                objectStores.push(WI.ObjectStore.__testObjectStore);
+
+            let existingNames = new Set;
+            for (let objectStore of objectStores) {
+                if (!database.objectStoreNames.contains(objectStore._name))
+                    database.createObjectStore(objectStore._name, objectStore._options);
+
+                existingNames.add(objectStore._name);
+            }
+
+            for (let objectStoreName of database.objectStoreNames) {
+                if (!existingNames.has(objectStoreName))
+                    database.deleteObjectStore(objectStoreName);
+            }
+        });
+        databaseRequest.addEventListener("success", (successEvent) => {
+            WI.ObjectStore._database = databaseRequest.result;
+            WI.ObjectStore._database.addEventListener("close", (closeEvent) => {
+                WI.ObjectStore._database = null;
+            });
+
+            for (let databaseCallback of WI.ObjectStore._databaseCallbacks)
+                databaseCallback(WI.ObjectStore._database);
+
+            WI.ObjectStore._databaseCallbacks = null;
+        });
+    }
+
+    // Public
+
+    get keyPath()
+    {
+        return (this._options || {}).keyPath;
+    }
+
+    associateObject(object, key, value)
+    {
+        if (typeof value === "object")
+            value = this._resolveKeyPath(value, key).value;
+
+        let resolved = this._resolveKeyPath(object, key);
+        resolved.object[resolved.key] = value;
+    }
+
+    async get(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        return this._operation("readonly", (objectStore) => objectStore.get(...args));
+    }
+
+    async getAll(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return [];
+
+        return this._operation("readonly", (objectStore) => objectStore.getAll(...args));
+    }
+
+    async getAllKeys(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return [];
+
+        return this._operation("readonly", (objectStore) => objectStore.getAllKeys(...args));
+    }
+
+    async put(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        return this._operation("readwrite", (objectStore) => objectStore.put(...args));
+    }
+
+    async putObject(object, ...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        console.assert(typeof object.toJSON === "function", "ObjectStore cannot store an object without JSON serialization", object.constructor.name);
+        let result = await this.put(object.toJSON(WI.ObjectStore.toJSONSymbol), ...args);
+        this.associateObject(object, args[0], result);
+        return result;
+    }
+
+    async delete(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        return this._operation("readwrite", (objectStore) => objectStore.delete(...args));
+    }
+
+    async deleteObject(object, ...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        return this.delete(this._resolveKeyPath(object).value, ...args);
+    }
+
+    async clear(...args)
+    {
+        if (!WI.ObjectStore.supported())
+            return undefined;
+
+        return this._operation("readwrite", (objectStore) => objectStore.clear(...args));
+    }
+
+    // Private
+
+    _resolveKeyPath(object, keyPath)
+    {
+        keyPath = keyPath || this._options.keyPath || "";
+
+        let parts = keyPath.split(".");
+        let key = parts.splice(-1, 1);
+        while (parts.length) {
+            if (!object.hasOwnProperty(parts[0]))
+                break;
+            object = object[parts.shift()];
+        }
+
+        if (parts.length)
+            key = parts.join(".") + "." + key;
+
+        return {
+            object,
+            key,
+            value: object[key],
+        };
+    }
+
+    async _operation(mode, func)
+    {
+        // IndexedDB transactions will auto-close if there are no active operations at the end of a
+        // microtask, so we need to do everything using event listeners instead of promises.
+        return new Promise((resolve, reject) => {
+            WI.ObjectStore._open((database) => {
+                let transaction = database.transaction([this._name], mode);
+                let objectStore = transaction.objectStore(this._name);
+                let request = null;
+
+                try {
+                    request = func(objectStore);
+                } catch (e) {
+                    reject(e);
+                    return;
+                }
+
+                function listener(event) {
+                    transaction.removeEventListener("complete", listener);
+                    transaction.removeEventListener("error", listener);
+                    request.removeEventListener("success", listener);
+                    request.removeEventListener("error", listener);
+
+                    if (request.error) {
+                        reject(request.error);
+                        return;
+                    }
+
+                    resolve(request.result);
+                }
+                transaction.addEventListener("complete", listener, {once: true});
+                transaction.addEventListener("error", listener, {once: true});
+                request.addEventListener("success", listener, {once: true});
+                request.addEventListener("error", listener, {once: true});
+            });
+        });
+    }
+};
+
+WI.ObjectStore._database = null;
+WI.ObjectStore._databaseCallbacks = null;
+
+WI.ObjectStore.toJSONSymbol = Symbol("ObjectStore-toJSON");
+
+// Be sure to update the `version` above when making changes.
+WI.objectStores = {
+    // Version 1
+    audits: new WI.ObjectStore("audit-manager-tests", {keyPath: "__id", autoIncrement: true}),
+
+    // Version 2
+    breakpoints: new WI.ObjectStore("debugger-breakpoints", {keyPath: "__id"}),
+
+    // Version 3
+    domBreakpoints: new WI.ObjectStore("dom-debugger-dom-breakpoints", {keyPath: "__id"}),
+    eventBreakpoints: new WI.ObjectStore("dom-debugger-event-breakpoints", {keyPath: "__id"}),
+    urlBreakpoints: new WI.ObjectStore("dom-debugger-url-breakpoints", {keyPath: "__id"}),
+
+    // Version 4
+    localResourceOverrides: new WI.ObjectStore("local-resource-overrides", {keyPath: "__id"}),
+
+    // Version 5
+    general: new WI.ObjectStore("general"),
+
+    // Version 6
+    cssPropertyNameCounts: new WI.ObjectStore("css-property-name-counts"),
+
+    // Version 7
+    symbolicBreakpoints: new WI.ObjectStore("debugger-symbolic-breakpoints", {keyPath: "__id"}),
+
+    // Version 8
+    consoleSnippets: new WI.ObjectStore("console-snippets", {keyPath: "__id"}),
+};

inspector/Base/Platform.js

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.Platform = {
+    name: InspectorFrontendHost.platform,
+    version: {
+        name: InspectorFrontendHost.platformVersionName,
+    }
+};

inspector/Base/ReferencePage.js

@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2022 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ReferencePage = class ReferencePage {
+    constructor(page, {topic} = {})
+    {
+        console.assert(page instanceof WI.ReferencePage || typeof page === "string", page);
+        console.assert(!(page instanceof WI.ReferencePage && page._page instanceof WI.ReferencePage), page);
+        console.assert(!(page instanceof WI.ReferencePage && page.topic), page);
+        console.assert(!topic || typeof topic === "string", topic);
+
+        if (page instanceof WI.ReferencePage)
+            page = page.page;
+        this._page = page;
+
+        this._topic = topic || "";
+    }
+
+    // Public
+
+    get page() { return this._page; }
+    get topic() { return this._topic; }
+
+    createLinkElement()
+    {
+        let url = "https://webkit.org/web-inspector/" + this._page + "/";
+        if (this._topic)
+            url += "#" + this._topic;
+
+        let wrapper = document.createElement("span");
+        wrapper.className = "reference-page-link-container";
+
+        let link = wrapper.appendChild(document.createElement("a"));
+        link.className = "reference-page-link";
+        link.href = link.title = url;
+        link.textContent = "?";
+        link.addEventListener("click", (event) => {
+            event.preventDefault();
+            event.stopPropagation();
+
+            WI.openURL(link.href, {alwaysOpenExternally: true});
+        });
+
+        return wrapper;
+    }
+};
+
+WI.ReferencePage.AuditTab = new WI.ReferencePage("audit-tab");
+WI.ReferencePage.AuditTab.AuditResults = new WI.ReferencePage(WI.ReferencePage.AuditTab, {topic: "audit-results"});
+WI.ReferencePage.AuditTab.CreatingAudits = new WI.ReferencePage(WI.ReferencePage.AuditTab, {topic: "creating-audits"});
+WI.ReferencePage.AuditTab.EditingAudits = new WI.ReferencePage(WI.ReferencePage.AuditTab, {topic: "editing-audits"});
+WI.ReferencePage.AuditTab.RunningAudits = new WI.ReferencePage(WI.ReferencePage.AuditTab, {topic: "running-audits"});
+
+WI.ReferencePage.DOMBreakpoints = new WI.ReferencePage("dom-breakpoints");
+WI.ReferencePage.DOMBreakpoints.Configuration = new WI.ReferencePage(WI.ReferencePage.DOMBreakpoints, {topic: "configuration"});
+
+WI.ReferencePage.DeviceSettings = new WI.ReferencePage("device-settings");
+WI.ReferencePage.DeviceSettings.Configuration = new WI.ReferencePage(WI.ReferencePage.DeviceSettings, {topic: "configuration"});
+
+WI.ReferencePage.ElementsTab = new WI.ReferencePage("elements-tab");
+WI.ReferencePage.ElementsTab.DOMTree = new WI.ReferencePage(WI.ReferencePage.ElementsTab, {topic: "dom-tree"});
+
+WI.ReferencePage.EventBreakpoints = new WI.ReferencePage("event-breakpoints");
+WI.ReferencePage.EventBreakpoints.Configuration = new WI.ReferencePage(WI.ReferencePage.EventBreakpoints, {topic: "configuration"});
+
+WI.ReferencePage.JavaScriptBreakpoints = new WI.ReferencePage("javascript-breakpoints");
+WI.ReferencePage.JavaScriptBreakpoints.Configuration = new WI.ReferencePage(WI.ReferencePage.JavaScriptBreakpoints, {topic: "configuration"});
+
+WI.ReferencePage.LayersTab = new WI.ReferencePage("layers-tab");
+
+WI.ReferencePage.LocalOverrides = new WI.ReferencePage("local-overrides");
+WI.ReferencePage.LocalOverrides.ConfiguringLocalOverrides = new WI.ReferencePage(WI.ReferencePage.LocalOverrides, {topic: "configuring-local-overrides"});
+
+WI.ReferencePage.NetworkTab = new WI.ReferencePage("network-tab");
+WI.ReferencePage.NetworkTab.CookiesPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "cookies-pane"});
+WI.ReferencePage.NetworkTab.HeadersPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "headers-pane"});
+WI.ReferencePage.NetworkTab.PreviewPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "preview-pane"});
+WI.ReferencePage.NetworkTab.SecurityPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "security-pane"});
+WI.ReferencePage.NetworkTab.SizesPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "sizes-pane"});
+WI.ReferencePage.NetworkTab.TimingPane = new WI.ReferencePage(WI.ReferencePage.NetworkTab, {topic: "timing-pane"});
+
+WI.ReferencePage.SymbolicBreakpoints = new WI.ReferencePage("symbolic-breakpoints");
+WI.ReferencePage.SymbolicBreakpoints.Configuration = new WI.ReferencePage(WI.ReferencePage.SymbolicBreakpoints, {topic: "configuration"});
+
+WI.ReferencePage.TimelinesTab = new WI.ReferencePage("timelines-tab");
+WI.ReferencePage.TimelinesTab.CPUTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "cpu-timeline"});
+WI.ReferencePage.TimelinesTab.EventsView = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "events-view"});
+WI.ReferencePage.TimelinesTab.FramesView = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "frames-view"});
+WI.ReferencePage.TimelinesTab.JavaScriptAllocationsTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "javascript-allocations-timeline"});
+WI.ReferencePage.TimelinesTab.JavaScriptAndEventsTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "javascript-events-timeline"});
+WI.ReferencePage.TimelinesTab.LayoutAndRenderingTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "layout-rendering-timeline"});
+WI.ReferencePage.TimelinesTab.MediaAndAnimationsTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "media-animations-timeline"});
+WI.ReferencePage.TimelinesTab.MemoryTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "memory-timeline"});
+WI.ReferencePage.TimelinesTab.NetworkRequestsTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "network-timeline"});
+WI.ReferencePage.TimelinesTab.ScreenshotsTimeline = new WI.ReferencePage(WI.ReferencePage.TimelinesTab, {topic: "screenshots-timeline"});
+
+WI.ReferencePage.URLBreakpoints = new WI.ReferencePage("url-breakpoints");
+WI.ReferencePage.URLBreakpoints.Configuration = new WI.ReferencePage(WI.ReferencePage.URLBreakpoints, {topic: "configuration"});

inspector/Base/SearchUtilities.js

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.SearchUtilities = class SearchUtilities {
+    static get defaultSettings()
+    {
+        return {
+            caseSensitive: WI.settings.searchCaseSensitive,
+            regularExpression: WI.settings.searchRegularExpression,
+        };
+    }
+
+    static createSettings(namePrefix)
+    {
+        let settings = {};
+        for (let [key, defaultSetting] of Object.entries(WI.SearchUtilities.defaultSettings)) {
+            let setting = new WI.Setting(namePrefix + "-" + defaultSetting.name, defaultSetting.value);
+            defaultSetting.addEventListener(WI.Setting.Event.Changed, function(event) {
+                this.value = defaultSetting.value;
+            }, setting);
+            settings[key] = setting;
+        }
+        return settings;
+    }
+
+    static searchRegExpForString(query, settings = {})
+    {
+        return WI.SearchUtilities._regExpForString(query, settings, {global: true});
+    }
+
+    static filterRegExpForString(query, settings = {})
+    {
+        return WI.SearchUtilities._regExpForString(query, settings);
+    }
+
+    static createSettingsButton(settings)
+    {
+        console.assert(!isEmptyObject(settings));
+
+        let button = document.createElement("button");
+        button.classList.add("search-settings");
+        button.tabIndex = -1;
+        WI.addMouseDownContextMenuHandlers(button, (contextMenu) => {
+            if (settings.caseSensitive) {
+                contextMenu.appendCheckboxItem(WI.UIString("Case Sensitive", "Case Sensitive @ Context Menu", "Context menu label for whether searches should be case sensitive."), () => {
+                    settings.caseSensitive.value = !settings.caseSensitive.value;
+                }, settings.caseSensitive.value);
+            }
+
+            if (settings.regularExpression) {
+                contextMenu.appendCheckboxItem(WI.UIString("Regular Expression", "Regular Expression @ Context Menu", "Context menu label for whether searches should be treated as regular expressions."), () => {
+                    settings.regularExpression.value = !settings.regularExpression.value;
+                }, settings.regularExpression.value);
+            }
+        });
+
+        button.appendChild(WI.ImageUtilities.useSVGSymbol("Images/Gear.svg", "glyph"));
+
+        function toggleActive() {
+            button.classList.toggle("active", Object.values(settings).some((setting) => !!setting.value));
+        }
+        settings.caseSensitive.addEventListener(WI.Setting.Event.Changed, toggleActive, button);
+        settings.regularExpression.addEventListener(WI.Setting.Event.Changed, toggleActive, button);
+        toggleActive();
+
+        return button;
+    }
+
+    static _regExpForString(query, settings = {}, options = {})
+    {
+        function checkSetting(setting) {
+            return setting instanceof WI.Setting ? setting.value : !!setting;
+        }
+
+        console.assert((typeof query === "string" && query) || query instanceof RegExp);
+
+        if (!checkSetting(settings.regularExpression)) {
+            try {
+                query = simpleGlobStringToRegExp(String(query));
+            } catch {
+                return null;
+            }
+        }
+
+        console.assert((typeof query === "string" && query) || query instanceof RegExp);
+
+        let flags = "";
+        if (options.global)
+            flags += "g"
+        if (!checkSetting(settings.caseSensitive))
+            flags += "i";
+
+        try {
+            return new RegExp(query, flags);
+        } catch {
+            return null;
+        }
+    }
+};

inspector/Base/Setting.js

@@ -0,0 +1,263 @@
+/*
+ * Copyright (C) 2009 Google Inc. All rights reserved.
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.Setting = class Setting extends WI.Object
+{
+    constructor(name, defaultValue)
+    {
+        super();
+
+        this._name = name;
+
+        this._defaultValue = defaultValue;
+    }
+
+    // Static
+
+    static migrateValue(key)
+    {
+        let localStorageKey = WI.Setting._localStorageKeyPrefix + key;
+
+        let value = undefined;
+        if (!window.InspectorTest && window.localStorage) {
+            let item = window.localStorage.getItem(localStorageKey);
+            if (item !== null) {
+                try {
+                    value = JSON.parse(item);
+                } catch { }
+
+                window.localStorage.removeItem(localStorageKey);
+            }
+        }
+        return value;
+    }
+
+    static reset()
+    {
+        let prefix = WI.Setting._localStorageKeyPrefix;
+
+        let keysToRemove = [];
+        for (let i = 0; i < window.localStorage.length; ++i) {
+            let key = window.localStorage.key(i);
+            if (key.startsWith(prefix))
+                keysToRemove.push(key);
+        }
+
+        for (let key of keysToRemove)
+            window.localStorage.removeItem(key);
+    }
+
+    // Public
+
+    get name() { return this._name; }
+    get defaultValue() { return this._defaultValue; }
+
+    get value()
+    {
+        if ("_value" in this)
+            return this._value;
+
+        // Make a copy of the default value so changes to object values don't modify the default value.
+        this._value = JSON.parse(JSON.stringify(this._defaultValue));
+
+        if (!window.InspectorTest && window.localStorage) {
+            let key = WI.Setting._localStorageKeyPrefix + this._name;
+            let item = window.localStorage.getItem(key);
+            if (item !== null) {
+                try {
+                    this._value = JSON.parse(item);
+                } catch {
+                    window.localStorage.removeItem(key);
+                }
+            }
+        }
+
+        return this._value;
+    }
+
+    set value(value)
+    {
+        if (this._value === value)
+            return;
+
+        this._value = value;
+
+        this.save();
+    }
+
+    save()
+    {
+        if (!window.InspectorTest && window.localStorage) {
+            let key = WI.Setting._localStorageKeyPrefix + this._name;
+            try {
+                if (Object.shallowEqual(this._value, this._defaultValue))
+                    window.localStorage.removeItem(key);
+                else
+                    window.localStorage.setItem(key, JSON.stringify(this._value));
+            } catch {
+                console.error("Error saving setting with name: " + this._name);
+            }
+        }
+
+        this.dispatchEventToListeners(WI.Setting.Event.Changed, this._value, {name: this._name});
+    }
+
+    reset()
+    {
+        // Make a copy of the default value so changes to object values don't modify the default value.
+        this.value = JSON.parse(JSON.stringify(this._defaultValue));
+    }
+};
+
+WI.Setting._localStorageKeyPrefix = (function() {
+    let inspectionLevel = InspectorFrontendHost ? InspectorFrontendHost.inspectionLevel : 1;
+    let levelString = inspectionLevel > 1 ? "-" + inspectionLevel : "";
+    return `com.apple.WebInspector${levelString}.`;
+})();
+
+WI.Setting.isFirstLaunch = !!window.InspectorTest || (window.localStorage && Object.keys(window.localStorage).every((key) => !key.startsWith(WI.Setting._localStorageKeyPrefix)));
+
+WI.Setting.Event = {
+    Changed: "setting-changed"
+};
+
+WI.EngineeringSetting = class EngineeringSetting extends WI.Setting
+{
+    get value()
+    {
+        if (WI.engineeringSettingsAllowed())
+            return super.value;
+        return this.defaultValue;
+    }
+
+    set value(value)
+    {
+        console.assert(WI.engineeringSettingsAllowed());
+        if (WI.engineeringSettingsAllowed())
+            super.value = value;
+    }
+};
+
+WI.DebugSetting = class DebugSetting extends WI.Setting
+{
+    get value()
+    {
+        if (WI.isDebugUIEnabled())
+            return super.value;
+        return this.defaultValue;
+    }
+
+    set value(value)
+    {
+        console.assert(WI.isDebugUIEnabled());
+        if (WI.isDebugUIEnabled())
+            super.value = value;
+    }
+};
+
+WI.settings = {
+    blackboxBreakpointEvaluations: new WI.Setting("blackbox-breakpoint-evaluations", true),
+    canvasRecordingAutoCaptureEnabled: new WI.Setting("canvas-recording-auto-capture-enabled", false),
+    canvasRecordingAutoCaptureFrameCount: new WI.Setting("canvas-recording-auto-capture-frame-count", 1),
+    consoleAutoExpandTrace: new WI.Setting("console-auto-expand-trace", true),
+    consoleSavedResultAlias: new WI.Setting("console-saved-result-alias", ""),
+    cssChangesPerNode: new WI.Setting("css-changes-per-node", false),
+    clearLogOnNavigate: new WI.Setting("clear-log-on-navigate", true),
+    clearNetworkOnNavigate: new WI.Setting("clear-network-on-navigate", true),
+    cpuTimelineThreadDetailsExpanded: new WI.Setting("cpu-timeline-thread-details-expanded", false),
+    domTreeDeemphasizesNodesThatAreNotRendered: new WI.Setting("dom-tree-deemphasizes-nodes-that-are-not-rendered", true),
+    emulateInUserGesture: new WI.Setting("emulate-in-user-gesture", false),
+    enableControlFlowProfiler: new WI.Setting("enable-control-flow-profiler", false),
+    enableElementsTabIndependentStylesDetailsSidebarPanel: new WI.Setting("elements-tab-independent-styles-details-panel", true),
+    enableLineWrapping: new WI.Setting("enable-line-wrapping", true),
+    flexOverlayShowOrderNumbers: new WI.Setting("flex-overlay-show-order-numbers", false),
+    frontendAppearance: new WI.Setting("frontend-appearance", "system"),
+    gridOverlayShowAreaNames: new WI.Setting("grid-overlay-show-area-names", false),
+    gridOverlayShowExtendedGridLines: new WI.Setting("grid-overlay-show-extended-grid-lines", false),
+    gridOverlayShowLineNames: new WI.Setting("grid-overlay-show-line-names", false),
+    gridOverlayShowLineNumbers: new WI.Setting("grid-overlay-show-line-numbers", true),
+    gridOverlayShowTrackSizes: new WI.Setting("grid-overlay-show-track-sizes", true),
+    groupMediaRequestsByDOMNode: new WI.Setting("group-media-requests-by-dom-node", WI.Setting.migrateValue("group-by-dom-node") || false),
+    indentUnit: new WI.Setting("indent-unit", 4),
+    indentWithTabs: new WI.Setting("indent-with-tabs", false),
+    resourceCachingDisabled: new WI.Setting("disable-resource-caching", false),
+    searchCaseSensitive: new WI.Setting("search-case-sensitive", false),
+    searchFromSelection: new WI.Setting("search-from-selection", false),
+    searchRegularExpression: new WI.Setting("search-regular-expression", false),
+    selectedNetworkDetailContentViewIdentifier: new WI.Setting("network-detail-content-view-identifier", "preview"),
+    sourceMapsEnabled: new WI.Setting("source-maps-enabled", true),
+    showConsoleMessageTimestamps: new WI.Setting("show-console-message-timestamps", false),
+    showCSSPropertySyntaxInDocumentationPopover: new WI.Setting("show-css-property-syntax-in-documentation-popover", false),
+    showCanvasPath: new WI.Setting("show-canvas-path", false),
+    showImageGrid: new WI.Setting("show-image-grid", true),
+    showInvisibleCharacters: new WI.Setting("show-invisible-characters", !!WI.Setting.migrateValue("show-invalid-characters")),
+    showJavaScriptTypeInformation: new WI.Setting("show-javascript-type-information", false),
+    showRulers: new WI.Setting("show-rulers", false),
+    showRulersDuringElementSelection: new WI.Setting("show-rulers-during-element-selection", true),
+    showScopeChainOnPause: new WI.Setting("show-scope-chain-sidebar", true),
+    showWhitespaceCharacters: new WI.Setting("show-whitespace-characters", false),
+    tabSize: new WI.Setting("tab-size", 4),
+    timelinesAutoStop: new WI.Setting("timelines-auto-stop", true),
+    timelineOverviewGroupBySourceCode: new WI.Setting("timeline-overview-group-by-source-code", true),
+    zoomFactor: new WI.Setting("zoom-factor", 1),
+
+    // Experimental
+    experimentalEnableStylesJumpToEffective: new WI.Setting("experimental-styles-jump-to-effective", false),
+    experimentalEnableStylesJumpToVariableDeclaration: new WI.Setting("experimental-styles-jump-to-variable-declaration", false),
+    experimentalAllowInspectingInspector: new WI.Setting("experimental-allow-inspecting-inspector", false),
+    experimentalCSSSortPropertyNameAutocompletionByUsage: new WI.Setting("experimental-css-sort-property-name-autocompletion-by-usage", true),
+    experimentalEnableNetworkEmulatedCondition: new WI.Setting("experimental-enable-network-emulated-condition", false),
+
+    // Protocol
+    protocolLogAsText: new WI.Setting("protocol-log-as-text", false),
+    protocolAutoLogMessages: new WI.Setting("protocol-auto-log-messages", false),
+    protocolAutoLogTimeStats: new WI.Setting("protocol-auto-log-time-stats", false),
+    protocolFilterMultiplexingBackendMessages: new WI.Setting("protocol-filter-multiplexing-backend-messages", true),
+
+    // Engineering
+    engineeringShowInternalExecutionContexts: new WI.EngineeringSetting("engineering-show-internal-execution-contexts", false),
+    engineeringShowInternalScripts: new WI.EngineeringSetting("engineering-show-internal-scripts", false),
+    engineeringPauseForInternalScripts: new WI.EngineeringSetting("engineering-pause-for-internal-scripts", false),
+    engineeringShowInternalObjectsInHeapSnapshot: new WI.EngineeringSetting("engineering-show-internal-objects-in-heap-snapshot", false),
+    engineeringShowPrivateSymbolsInHeapSnapshot: new WI.EngineeringSetting("engineering-show-private-symbols-in-heap-snapshot", false),
+    engineeringAllowEditingUserAgentShadowTrees: new WI.EngineeringSetting("engineering-allow-editing-user-agent-shadow-trees", false),
+
+    // Debug
+    debugShowConsoleEvaluations: new WI.DebugSetting("debug-show-console-evaluations", false),
+    debugOutlineFocusedElement: new WI.DebugSetting("debug-outline-focused-element", false),
+    debugEnableLayoutFlashing: new WI.DebugSetting("debug-enable-layout-flashing", false),
+    debugEnableStyleEditingDebugMode: new WI.DebugSetting("debug-enable-style-editing-debug-mode", false),
+    debugEnableUncaughtExceptionReporter: new WI.DebugSetting("debug-enable-uncaught-exception-reporter", true),
+    debugEnableDiagnosticLogging: new WI.DebugSetting("debug-enable-diagnostic-logging", true),
+    debugAutoLogDiagnosticEvents: new WI.DebugSetting("debug-auto-log-diagnostic-events", false),
+    debugLayoutDirection: new WI.DebugSetting("debug-layout-direction-override", "system"),
+    debugShowMockWebExtensionTab: new WI.DebugSetting("debug-show-mock-web-extension-tab", false),
+};

inspector/Base/TargetType.js

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.TargetType = {
+    ITML: "itml",
+    JavaScript: "javascript",
+    Page: "page",
+    ServiceWorker: "service-worker",
+    WebPage: "web-page",
+    Worker: "worker",
+};
+
+WI.TargetType.all = Object.values(WI.TargetType);

inspector/Base/Throttler.js

@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// Throttler wraps a function and ensures it doesn't get called more than once every `delay` ms.
+// The first fire will always trigger synchronous, and subsequent calls that need to be throttled
+// will happen later asynchronously.
+//
+// Example:
+//
+//     let throttler = new Throttler(250, () => { this.refresh() });
+//     element.addEventListener("keydown", (event) => { throttler.fire(); });
+//
+// Will ensure `refresh` happens no more than once every 250ms no matter how often `fire` is called:
+//
+//               0ms                        250ms                       500ms
+//     time:      |---------------------------|---------------------------|
+//     fire:      ^     ^ ^        ^      ^        ^    ^   ^
+//     refreshes: * (1)                       * (2)                       * (3)
+//
+// When the wrapped function is actually called, it will be given the most recent set of arguments.
+
+class Throttler
+{
+    constructor(callback, delay)
+    {
+        console.assert(typeof callback === "function");
+        console.assert(delay >= 0);
+
+        this._callback = callback;
+        this._delay = delay;
+
+        this._lastArguments = [];
+
+        this._timeoutIdentifier = undefined;
+        this._lastFireTime = -this._delay;
+    }
+
+    // Public
+
+    force()
+    {
+        this._lastArguments = arguments;
+        this._execute();
+    }
+
+    fire()
+    {
+        this._lastArguments = arguments;
+
+        let remaining = this._delay - (Date.now() - this._lastFireTime);
+        if (remaining <= 0) {
+            this._execute();
+            return;
+        }
+
+        if (this._timeoutIdentifier)
+            return;
+
+        this._timeoutIdentifier = setTimeout(() => {
+            this._execute();
+        }, remaining);
+    }
+
+    cancel()
+    {
+        this._lastArguments = [];
+
+        if (this._timeoutIdentifier) {
+            clearTimeout(this._timeoutIdentifier);
+            this._timeoutIdentifier = undefined;
+        }
+    }
+
+    // Private
+
+    _execute()
+    {
+        this._lastFireTime = Date.now();
+
+        let args = this._lastArguments;
+
+        this.cancel();
+
+        this._callback.apply(undefined, args);
+    }
+}

inspector/Base/URLUtilities.js

@@ -0,0 +1,373 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+function removeURLFragment(url)
+{
+    var hashIndex = url.indexOf("#");
+    if (hashIndex >= 0)
+        return url.substring(0, hashIndex);
+    return url;
+}
+
+function relativePath(path, basePath)
+{
+    console.assert(path.charAt(0) === "/");
+    console.assert(basePath.charAt(0) === "/");
+
+    var pathComponents = path.split("/");
+    var baseComponents = basePath.replace(/\/$/, "").split("/");
+    var finalComponents = [];
+
+    var index = 1;
+    for (; index < pathComponents.length && index < baseComponents.length; ++index) {
+        if (pathComponents[index] !== baseComponents[index])
+            break;
+    }
+
+    for (var i = index; i < baseComponents.length; ++i)
+        finalComponents.push("..");
+
+    for (var i = index; i < pathComponents.length; ++i)
+        finalComponents.push(pathComponents[i]);
+
+    return finalComponents.join("/");
+}
+
+function parseSecurityOrigin(securityOrigin)
+{
+    securityOrigin = securityOrigin ? securityOrigin.trim() : "";
+
+    let match = securityOrigin.match(/^(?<scheme>[^:]+):\/\/(?<host>[^\/:]*)(?::(?<port>[\d]+))?$/i);
+    if (!match)
+        return {scheme: null, host: null, port: null};
+
+    let scheme = match.groups.scheme.toLowerCase();
+    let host = match.groups.host.toLowerCase();
+    let port = Number(match.groups.port) || null;
+
+    return {scheme, host, port};
+}
+
+function parseDataURL(url)
+{
+    if (!url.startsWith("data:"))
+        return null;
+
+    // data:[<media type>][;charset=<character set>][;base64],<data>
+    let match = url.match(/^data:(?<mime>[^;,]*)?(?:;charset=(?<charset>[^;,]*?))?(?<base64>;base64)?,(?<data>.*)$/);
+    if (!match)
+        return null;
+
+    let scheme = "data";
+    let mimeType = match.groups.mime || "text/plain";
+    let charset = match.groups.charset || "US-ASCII";
+    let base64 = !!match.groups.base64;
+    let data = decodeURIComponent(match.groups.data);
+
+    return {scheme, mimeType, charset, base64, data};
+}
+
+function parseURL(url)
+{
+    let result = {
+        scheme: null,
+        userinfo: null,
+        host: null,
+        port: null,
+        origin: null,
+        path: null,
+        queryString: null,
+        fragment: null,
+        lastPathComponent: null,
+    };
+
+    // dataURLs should be handled by `parseDataURL`.
+    if (url && url.startsWith("data:")) {
+        result.scheme = "data";
+        return result;
+    }
+
+    // Internal sourceURLs will fail in URL constructor anyways.
+    if (isWebKitInternalScript(url))
+        return result;
+
+    let parsed = null;
+    try {
+        parsed = new URL(url);
+    } catch {
+        return result;
+    }
+
+    result.scheme = parsed.protocol.slice(0, -1); // remove trailing ":"
+
+    if (parsed.username)
+        result.userinfo = parsed.username;
+    if (parsed.password)
+        result.userinfo = (result.userinfo || "") + ":" + parsed.password;
+
+    if (parsed.hostname)
+        result.host = parsed.hostname;
+
+    if (parsed.port)
+        result.port = Number(parsed.port);
+
+    if (parsed.origin && parsed.origin !== "null")
+        result.origin = parsed.origin;
+    else if (result.scheme && result.host) {
+        result.origin = result.scheme + "://" + result.host;
+        if (result.port)
+            result.origin += ":" + result.port;
+    }
+
+    if (parsed.pathname)
+        result.path = parsed.pathname;
+
+    if (parsed.search)
+        result.queryString = parsed.search.substring(1); // remove leading "?"
+
+    if (parsed.hash)
+        result.fragment = parsed.hash.substring(1); // remove leading "#"
+
+    // Find last path component.
+    if (result.path && result.path !== "/") {
+        // Skip the trailing slash if there is one.
+        let endOffset = result.path.endsWith("/") ? 1 : 0;
+        let lastSlashIndex = result.path.lastIndexOf("/", result.path.length - 1 - endOffset);
+        if (lastSlashIndex !== -1)
+            result.lastPathComponent = result.path.substring(lastSlashIndex + 1, result.path.length - endOffset);
+    }
+
+    return result;
+}
+
+function absoluteURL(partialURL, baseURL)
+{
+    partialURL = partialURL ? partialURL.trim() : "";
+
+    // Return data and javascript URLs as-is.
+    if (partialURL.startsWith("data:") || partialURL.startsWith("javascript:") || partialURL.startsWith("mailto:"))
+        return partialURL;
+
+    // If the URL has a scheme it is already a full URL, so return it.
+    if (parseURL(partialURL).scheme)
+        return partialURL;
+
+    // If there is no partial URL, just return the base URL.
+    if (!partialURL)
+        return baseURL || null;
+
+    var baseURLComponents = parseURL(baseURL);
+
+    // The base URL needs to be an absolute URL. Return null if it isn't.
+    if (!baseURLComponents.scheme)
+        return null;
+
+    // A URL that starts with "//" is a full URL without the scheme. Use the base URL scheme.
+    if (partialURL[0] === "/" && partialURL[1] === "/")
+        return baseURLComponents.scheme + ":" + partialURL;
+
+    // The path can be null for URLs that have just a scheme and host (like "http://apple.com"). So make the path be "/".
+    if (!baseURLComponents.path)
+        baseURLComponents.path = "/";
+
+    // Generate the base URL prefix that is used in the rest of the cases.
+    var baseURLPrefix = baseURLComponents.scheme + "://" + baseURLComponents.host + (baseURLComponents.port ? (":" + baseURLComponents.port) : "");
+
+    // A URL that starts with "?" is just a query string that gets applied to the base URL (replacing the base URL query string and fragment).
+    if (partialURL[0] === "?")
+        return baseURLPrefix + baseURLComponents.path + partialURL;
+
+    // A URL that starts with "/" is an absolute path that gets applied to the base URL (replacing the base URL path, query string and fragment).
+    if (partialURL[0] === "/")
+        return baseURLPrefix + resolveDotsInPath(partialURL);
+
+    // A URL that starts with "#" is just a fragment that gets applied to the base URL (replacing the base URL fragment, maintaining the query string).
+    if (partialURL[0] === "#") {
+        let queryStringComponent = baseURLComponents.queryString ? "?" + baseURLComponents.queryString : "";
+        return baseURLPrefix + baseURLComponents.path + queryStringComponent + partialURL;
+    }
+
+    // Generate the base path that is used in the final case by removing everything after the last "/" from the base URL's path.
+    var basePath = baseURLComponents.path.substring(0, baseURLComponents.path.lastIndexOf("/")) + "/";
+    return baseURLPrefix + resolveDotsInPath(basePath + partialURL);
+}
+
+function parseQueryString(queryString, arrayResult)
+{
+    if (!queryString)
+        return arrayResult ? [] : {};
+
+    function decode(string)
+    {
+        try {
+            // Replace "+" with " " then decode percent encoded values.
+            return decodeURIComponent(string.replace(/\+/g, " "));
+        } catch {
+            return string;
+        }
+    }
+
+    var parameters = arrayResult ? [] : {};
+    for (let parameterString of queryString.split("&")) {
+        let index = parameterString.indexOf("=");
+        if (index === -1)
+            index = parameterString.length;
+
+        let name = decode(parameterString.substring(0, index));
+        let value = decode(parameterString.substring(index + 1));
+
+        if (arrayResult)
+            parameters.push({name, value});
+        else
+            parameters[name] = value;
+    }
+
+    return parameters;
+}
+
+WI.displayNameForURL = function(url, urlComponents, options = {})
+{
+    if (url.startsWith("data:"))
+        return WI.truncateURL(url);
+
+    if (!urlComponents)
+        urlComponents = parseURL(url);
+
+    var displayName;
+    try {
+        displayName = decodeURIComponent(urlComponents.lastPathComponent || "");
+    } catch {
+        displayName = urlComponents.lastPathComponent;
+    }
+
+    if (options.allowDirectoryAsName && (urlComponents.path === "/" || (displayName && urlComponents.path.endsWith(displayName + "/"))))
+        displayName = "/";
+
+    return displayName || WI.displayNameForHost(urlComponents.host) || url;
+};
+
+WI.truncateURL = function(url, multiline = false, dataURIMaxSize = 6)
+{
+    if (!url.startsWith("data:"))
+        return url;
+
+    const dataIndex = url.indexOf(",") + 1;
+    let header = url.slice(0, dataIndex);
+    if (multiline)
+        header += "\n";
+
+    const data = url.slice(dataIndex);
+    if (data.length < dataURIMaxSize)
+        return header + data;
+
+    const firstChunk = data.slice(0, Math.ceil(dataURIMaxSize / 2));
+    const ellipsis = "\u2026";
+    const middleChunk = multiline ? `\n${ellipsis}\n` : ellipsis;
+    const lastChunk = data.slice(-Math.floor(dataURIMaxSize / 2));
+    return header + firstChunk + middleChunk + lastChunk;
+};
+
+WI.urlWithoutExtension = function(urlString)
+{
+    let url = null;
+    try {
+        url = new URL(urlString);
+    } catch { }
+    if (!url)
+        return urlString;
+
+    let firstDotInLastPathComponentIndex = url.pathname.indexOf(".", url.pathname.lastIndexOf("/"));
+    if (firstDotInLastPathComponentIndex !== -1)
+        url.pathname = url.pathname.substring(0, firstDotInLastPathComponentIndex);
+
+    url.search = "";
+    url.hash = "";
+    return url.toString();
+};
+
+WI.urlWithoutFragment = function(urlString)
+{
+    try {
+        let url = new URL(urlString);
+        if (url.hash) {
+            url.hash = "";
+            return url.toString();
+        }
+
+        // URL.toString with an empty hash leaves the hash symbol, so we strip it.
+        let result = url.toString();
+        if (result.endsWith("#"))
+            return result.substring(0, result.length - 1);
+
+        return result;
+    } catch { }
+
+    return urlString;
+};
+
+WI.displayNameForHost = function(host)
+{
+    let extensionName = WI.browserManager.extensionNameForId(host);
+    if (extensionName)
+        return extensionName;
+
+    // FIXME <rdar://problem/11237413>: This should decode punycode hostnames.
+
+    return host;
+};
+
+// https://tools.ietf.org/html/rfc7540#section-8.1.2.3
+WI.h2Authority = function(components)
+{
+    let {scheme, userinfo, host, port} = components;
+    let result = host || "";
+
+    // The authority MUST NOT include the deprecated "userinfo"
+    // subcomponent for "http" or "https" schemed URIs.
+    if (userinfo && (scheme !== "http" && scheme !== "https"))
+        result = userinfo + "@" + result;
+    if (port)
+        result += ":" + port;
+
+    return result;
+};
+
+// https://tools.ietf.org/html/rfc7540#section-8.1.2.3
+WI.h2Path = function(components)
+{
+    let {scheme, path, queryString} = components;
+    let result = path || "";
+
+    // The ":path" pseudo-header field includes the path and query parts
+    // of the target URI. [...] This pseudo-header field MUST NOT be empty
+    // for "http" or "https" URIs; "http" or "https" URIs that do not contain
+    // a path component MUST include a value of '/'.
+    if (!path && (scheme === "http" || scheme === "https"))
+        result = "/";
+    if (queryString)
+        result += "?" + queryString;
+
+    return result;
+};

inspector/Base/WebInspector.js

@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+var WI = {}; // Namespace

inspector/Base/YieldableTask.js

@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.YieldableTask = class YieldableTask
+{
+    constructor(delegate, items, options = {})
+    {
+        let {workInterval, idleInterval} = options;
+        console.assert(!workInterval || workInterval > 0, workInterval);
+        console.assert(!idleInterval || idleInterval > 0, idleInterval);
+
+        console.assert(delegate && typeof delegate.yieldableTaskWillProcessItem === "function", "Delegate provide an implementation of method 'yieldableTaskWillProcessItem'.");
+
+        console.assert(items instanceof Object && Symbol.iterator in items, "Argument `items` must subclass Object and be iterable.", items);
+
+        // Milliseconds to run before the task should yield.
+        this._workInterval = workInterval || 10;
+        // Milliseconds to idle before asynchronously resuming the task.
+        this._idleInterval = idleInterval || 0;
+
+        this._delegate = delegate;
+
+        this._items = items;
+        this._idleTimeoutIdentifier = undefined;
+        this._processing = false;
+        this._processing = false;
+        this._cancelled = false;
+    }
+
+    // Public
+
+    get processing() { return this._processing; }
+    get cancelled() { return this._cancelled; }
+
+    get idleInterval() { return this._idleInterval; }
+    get workInterval() { return this._workInterval; }
+
+    start()
+    {
+        console.assert(!this._processing);
+        if (this._processing)
+            return;
+
+        console.assert(!this._cancelled);
+        if (this._cancelled)
+            return;
+
+        function* createIteratorForProcessingItems()
+        {
+            let startTime = Date.now();
+            let processedItems = [];
+
+            for (let item of this._items) {
+                if (this._cancelled)
+                    break;
+
+                this._delegate.yieldableTaskWillProcessItem(this, item);
+                processedItems.push(item);
+
+                // Calling out to the delegate may cause the task to be cancelled.
+                if (this._cancelled)
+                    break;
+
+                let elapsedTime = Date.now() - startTime;
+                if (elapsedTime > this._workInterval) {
+                    let returnedItems = processedItems.slice();
+                    processedItems = [];
+                    this._willYield(returnedItems, elapsedTime);
+
+                    yield;
+
+                    startTime = Date.now();
+                }
+            }
+
+            // The task sends a fake yield notification to the delegate so that
+            // the delegate receives notification of all processed items before finishing.
+            if (processedItems.length)
+                this._willYield(processedItems, Date.now() - startTime);
+        }
+
+        this._processing = true;
+        this._pendingItemsIterator = createIteratorForProcessingItems.call(this);
+        this._processPendingItems();
+    }
+
+    cancel()
+    {
+        if (!this._processing)
+            return;
+
+        this._cancelled = true;
+    }
+
+    // Private
+
+    _processPendingItems()
+    {
+        console.assert(this._processing);
+
+        if (this._cancelled)
+            return;
+
+        if (!this._pendingItemsIterator.next().done) {
+            this._idleTimeoutIdentifier = setTimeout(() => { this._processPendingItems(); }, this._idleInterval);
+            return;
+        }
+
+        this._didFinish();
+    }
+
+    _willYield(processedItems, elapsedTime)
+    {
+        if (typeof this._delegate.yieldableTaskDidYield === "function")
+            this._delegate.yieldableTaskDidYield(this, processedItems, elapsedTime);
+    }
+
+    _didFinish()
+    {
+        this._processing = false;
+        this._pendingItemsIterator = null;
+
+        if (this._idleTimeoutIdentifier) {
+            clearTimeout(this._idleTimeoutIdentifier);
+            this._idleTimeoutIdentifier = undefined;
+        }
+
+        if (typeof this._delegate.yieldableTaskDidFinish === "function")
+            this._delegate.yieldableTaskDidFinish(this);
+    }
+};
+

inspector/Controllers/AnimationManager.js

@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: AnimationManager lacks advanced multi-target support. (Animations per-target)
+
+WI.AnimationManager = class AnimationManager
+{
+    constructor()
+    {
+        this._enabled = false;
+        this._animationCollection = new WI.AnimationCollection;
+        this._animationIdMap = new Map;
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._handleMainResourceDidChange, this);
+    }
+
+    // Agent
+
+    get domains() { return ["Animation"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "Animation");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        // COMPATIBILITY (iOS 13.1): Animation.enable did not exist yet.
+        if (target.hasCommand("Animation.enable"))
+            target.AnimationAgent.enable();
+    }
+
+    // Public
+
+    get animationCollection() { return this._animationCollection; }
+
+    get supported()
+    {
+        // COMPATIBILITY (iOS 13.1): Animation.enable did not exist yet.
+        return InspectorBackend.hasCommand("Animation.enable");
+    }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        for (let target of WI.targets) {
+            // COMPATIBILITY (iOS 13.1): Animation.disable did not exist yet.
+            if (target.hasCommand("Animation.disable"))
+                target.AnimationAgent.disable();
+        }
+
+        this._animationCollection.clear();
+        this._animationIdMap.clear();
+
+        this._enabled = false;
+    }
+
+    // AnimationObserver
+
+    animationCreated(animationPayload)
+    {
+        console.assert(!this._animationIdMap.has(animationPayload.animationId), `Animation already exists with id ${animationPayload.animationId}.`);
+
+        let animation = WI.Animation.fromPayload(animationPayload);
+        this._animationCollection.add(animation);
+        this._animationIdMap.set(animation.animationId, animation);
+    }
+
+    nameChanged(animationId, name)
+    {
+        let animation = this._animationIdMap.get(animationId);
+        console.assert(animation);
+        if (!animation)
+            return;
+
+        animation.nameChanged(name);
+    }
+
+    effectChanged(animationId, effect)
+    {
+        let animation = this._animationIdMap.get(animationId);
+        console.assert(animation);
+        if (!animation)
+            return;
+
+        animation.effectChanged(effect);
+    }
+
+    targetChanged(animationId, effect)
+    {
+        let animation = this._animationIdMap.get(animationId);
+        console.assert(animation);
+        if (!animation)
+            return;
+
+        animation.targetChanged(effect);
+    }
+
+    animationDestroyed(animationId)
+    {
+        let animation = this._animationIdMap.take(animationId);
+        console.assert(animation);
+        if (!animation)
+            return;
+
+        this._animationCollection.remove(animation);
+    }
+
+    // Private
+
+    _handleMainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+        if (!event.target.isMainFrame())
+            return;
+
+        WI.Animation.resetUniqueDisplayNameNumbers();
+
+        this._animationCollection.clear();
+        this._animationIdMap.clear();
+    }
+};

inspector/Controllers/Annotator.js

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ * Copyright (C) 2014 Saam Barati <saambarati1@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.Annotator = class Annotator extends WI.Object
+{
+    constructor(sourceCodeTextEditor)
+    {
+        super();
+
+        console.assert(sourceCodeTextEditor instanceof WI.SourceCodeTextEditor, sourceCodeTextEditor);
+
+        this._sourceCodeTextEditor = sourceCodeTextEditor;
+        this._timeoutIdentifier = null;
+        this._isActive = false;
+    }
+
+    // Public
+
+    get sourceCodeTextEditor()
+    {
+        return this._sourceCodeTextEditor;
+    }
+
+    isActive()
+    {
+        return this._isActive;
+    }
+
+    pause()
+    {
+        this._clearTimeoutIfNeeded();
+        this._isActive = false;
+    }
+
+    resume()
+    {
+        this._clearTimeoutIfNeeded();
+        this._isActive = true;
+        this.insertAnnotations();
+    }
+
+    refresh()
+    {
+        console.assert(this._isActive);
+        if (!this._isActive)
+            return;
+
+        this._clearTimeoutIfNeeded();
+        this.insertAnnotations();
+    }
+
+    reset()
+    {
+        this._clearTimeoutIfNeeded();
+        this._isActive = true;
+        this.clearAnnotations();
+        this.insertAnnotations();
+    }
+
+    clear()
+    {
+        this.pause();
+        this.clearAnnotations();
+    }
+
+    // Protected
+
+    insertAnnotations()
+    {
+        // Implemented by subclasses.
+    }
+
+    clearAnnotations()
+    {
+        // Implemented by subclasses.
+    }
+
+    // Private
+
+    _clearTimeoutIfNeeded()
+    {
+        if (this._timeoutIdentifier) {
+            clearTimeout(this._timeoutIdentifier);
+            this._timeoutIdentifier = null;
+        }
+    }
+};

inspector/Controllers/AppController.js

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.AppController = class AppController extends WI.AppControllerBase
+{
+    constructor()
+    {
+        super();
+
+        this._debuggableType = WI.DebuggableType.fromString(InspectorFrontendHost.debuggableInfo.debuggableType);
+        console.assert(this._debuggableType);
+        if (!this._debuggableType)
+            this._debuggableType = WI.DebuggableType.JavaScript;
+    }
+
+    // Properties.
+
+    get debuggableType() { return this._debuggableType; }
+
+    // API.
+
+    activateExtraDomains(domains)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(this._debuggableType === WI.DebuggableType.JavaScript);
+        console.assert(WI.targets.length === 1);
+
+        let target = WI.mainTarget;
+        console.assert(target instanceof WI.DirectBackendTarget);
+        console.assert(target.type === WI.TargetType.JavaScript);
+
+        if (this._debuggableType === WI.DebuggableType.ITML || target.type === WI.TargetType.ITML)
+            throw new Error("Extra domains have already been activated, cannot activate again.");
+
+        this._debuggableType = WI.DebuggableType.ITML;
+        target._type = WI.TargetType.ITML;
+
+        for (let domain of domains) {
+            InspectorBackend.activateDomain(domain);
+
+            target.activateExtraDomain(domain);
+
+            let manager = WI.managers.find((manager) => manager.domains && manager.domains.includes(domain));
+            if (manager)
+                manager.activateExtraDomain(domain);
+            else if (target.hasCommand(domain + ".enable"))
+                target._agents[domain].enable();
+        }
+
+        // FIXME: all code within WI.activateExtraDomains should be distributed elsewhere.
+        WI.activateExtraDomains(domains);
+    }
+};

inspector/Controllers/AppControllerBase.js

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.NotImplementedError = class NotImplementedError extends Error
+{
+    constructor(message = "This method is not implemented.")
+    {
+        super(message);
+    }
+
+    static subclassMustOverride()
+    {
+        return new WI.NotImplementedError("This method must be overridden by a subclass.");
+    }
+};
+
+WI.AppControllerBase = class AppControllerBase
+{
+    constructor()
+    {
+        this._initialized = false;
+
+        this._extensionController = new WI.WebInspectorExtensionController;
+    }
+
+    // Public
+
+    get debuggableType() { throw WI.NotImplementedError.subclassMustOverride(); }
+    get extensionController() { return this._extensionController; }
+
+    // Since various members of the app controller depend on the global singleton to exist,
+    // some initialization needs to happen after the app controller has been constructed.
+    initialize()
+    {
+        if (this._initialized)
+            throw new Error("App controller is already initialized.");
+
+        this._initialized = true;
+
+        // FIXME: eventually all code within WI.loaded should be distributed elsewhere.
+        WI.loaded();
+    }
+
+    isWebDebuggable()
+    {
+        return this.debuggableType === WI.DebuggableType.Page
+            || this.debuggableType === WI.DebuggableType.WebPage;
+    }
+};

inspector/Controllers/ApplicationCacheManager.js

@@ -0,0 +1,274 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: ApplicationCacheManager lacks advanced multi-target support. (ApplciationCache objects per-target)
+
+WI.ApplicationCacheManager = class ApplicationCacheManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+        this._reset();
+    }
+
+    // Agent
+
+    get domains() { return ["ApplicationCache"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "ApplicationCache");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("ApplicationCache")) {
+            target.ApplicationCacheAgent.enable();
+            target.ApplicationCacheAgent.getFramesWithManifests(this._framesWithManifestsLoaded.bind(this));
+        }
+    }
+
+    // Public
+
+    get online() { return this._online; }
+
+    get applicationCacheObjects()
+    {
+        var applicationCacheObjects = [];
+        for (var id in this._applicationCacheObjects)
+            applicationCacheObjects.push(this._applicationCacheObjects[id]);
+        return applicationCacheObjects;
+    }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        this._reset();
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.addEventListener(WI.Frame.Event.ChildFrameWasRemoved, this._childFrameWasRemoved, this);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        this._enabled = false;
+
+        for (let target of WI.targets) {
+            // COMPATIBILITY (iOS 13): ApplicationCache.disable did not exist yet.
+            if (target.hasCommand("ApplicationCache.disable"))
+                target.ApplicationCacheAgent.disable();
+        }
+
+        WI.Frame.removeEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.removeEventListener(WI.Frame.Event.ChildFrameWasRemoved, this._childFrameWasRemoved, this);
+
+        this._reset();
+    }
+
+    requestApplicationCache(frame, callback)
+    {
+        console.assert(this._enabled);
+
+        function callbackWrapper(error, applicationCache)
+        {
+            if (error) {
+                callback(null);
+                return;
+            }
+
+            callback(applicationCache);
+        }
+
+        let target = WI.assumingMainTarget();
+        target.ApplicationCacheAgent.getApplicationCacheForFrame(frame.id, callbackWrapper);
+    }
+
+    // ApplicationCacheObserver
+
+    networkStateUpdated(isNowOnline)
+    {
+        console.assert(this._enabled);
+
+        this._online = isNowOnline;
+
+        this.dispatchEventToListeners(WI.ApplicationCacheManager.Event.NetworkStateUpdated, {online: this._online});
+    }
+
+    applicationCacheStatusUpdated(frameId, manifestURL, status)
+    {
+        console.assert(this._enabled);
+
+        let frame = WI.networkManager.frameForIdentifier(frameId);
+        if (!frame)
+            return;
+
+        this._frameManifestUpdated(frame, manifestURL, status);
+    }
+
+    // Private
+
+    _reset()
+    {
+        this._online = true;
+        this._applicationCacheObjects = {};
+
+        this.dispatchEventToListeners(WI.ApplicationCacheManager.Event.Cleared);
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (event.target.isMainFrame()) {
+            this._reset();
+            return;
+        }
+
+        let target = WI.assumingMainTarget();
+        if (target.hasDomain("ApplicationCache"))
+            target.ApplicationCacheAgent.getManifestForFrame(event.target.id, this._manifestForFrameLoaded.bind(this, event.target.id));
+    }
+
+    _childFrameWasRemoved(event)
+    {
+        this._frameManifestRemoved(event.data.childFrame);
+    }
+
+    _manifestForFrameLoaded(frameId, error, manifestURL)
+    {
+        if (!this._enabled)
+            return;
+
+        var frame = WI.networkManager.frameForIdentifier(frameId);
+        if (!frame)
+            return;
+
+        // A frame can go away between `ApplicationCache.getManifestForFrame` being called and the
+        // response being received.
+        if (error) {
+            WI.reportInternalError(error);
+            return;
+        }
+
+        if (!manifestURL)
+            this._frameManifestRemoved(frame);
+    }
+
+    _framesWithManifestsLoaded(error, framesWithManifests)
+    {
+        if (error) {
+            WI.reportInternalError(error);
+            return;
+        }
+
+        if (!this._enabled)
+            return;
+
+        for (var i = 0; i < framesWithManifests.length; ++i) {
+            var frame = WI.networkManager.frameForIdentifier(framesWithManifests[i].frameId);
+            if (!frame)
+                continue;
+
+            this._frameManifestUpdated(frame, framesWithManifests[i].manifestURL, framesWithManifests[i].status);
+        }
+    }
+
+    _frameManifestUpdated(frame, manifestURL, status)
+    {
+        if (status === WI.ApplicationCacheManager.Status.Uncached) {
+            this._frameManifestRemoved(frame);
+            return;
+        }
+
+        if (!manifestURL)
+            return;
+
+        var manifestFrame = this._applicationCacheObjects[frame.id];
+        if (manifestFrame && manifestURL !== manifestFrame.manifest.manifestURL)
+            this._frameManifestRemoved(frame);
+
+        var oldStatus = manifestFrame ? manifestFrame.status : -1;
+        var statusChanged = manifestFrame && status !== oldStatus;
+        if (manifestFrame)
+            manifestFrame.status = status;
+
+        if (!this._applicationCacheObjects[frame.id]) {
+            var cacheManifest = new WI.ApplicationCacheManifest(manifestURL);
+            this._applicationCacheObjects[frame.id] = new WI.ApplicationCacheFrame(frame, cacheManifest, status);
+
+            this.dispatchEventToListeners(WI.ApplicationCacheManager.Event.FrameManifestAdded, {frameManifest: this._applicationCacheObjects[frame.id]});
+        }
+
+        if (statusChanged)
+            this.dispatchEventToListeners(WI.ApplicationCacheManager.Event.FrameManifestStatusChanged, {frameManifest: this._applicationCacheObjects[frame.id]});
+    }
+
+    _frameManifestRemoved(frame)
+    {
+        if (!this._applicationCacheObjects[frame.id])
+            return;
+
+        delete this._applicationCacheObjects[frame.id];
+
+        this.dispatchEventToListeners(WI.ApplicationCacheManager.Event.FrameManifestRemoved, {frame});
+    }
+};
+
+WI.ApplicationCacheManager.Event = {
+    Cleared: "application-cache-manager-cleared",
+    FrameManifestAdded: "application-cache-manager-frame-manifest-added",
+    FrameManifestRemoved: "application-cache-manager-frame-manifest-removed",
+    FrameManifestStatusChanged: "application-cache-manager-frame-manifest-status-changed",
+    NetworkStateUpdated: "application-cache-manager-network-state-updated"
+};
+
+WI.ApplicationCacheManager.Status = {
+    Uncached: 0,
+    Idle: 1,
+    Checking: 2,
+    Downloading: 3,
+    UpdateReady: 4,
+    Obsolete: 5
+};

inspector/Controllers/AuditManager.js

@@ -0,0 +1,452 @@
+/*
+ * Copyright (C) 2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.AuditManager = class AuditManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._tests = [];
+        this._results = [];
+
+        this._runningState = WI.AuditManager.RunningState.Inactive;
+        this._runningTests = [];
+
+        this._disabledDefaultTestsSetting = new WI.Setting("audit-disabled-default-tests", []);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._handleFrameMainResourceDidChange, this);
+    }
+
+    // Static
+
+    static synthesizeWarning(message)
+    {
+        message = WI.UIString("Audit Warning: %s").format(message);
+
+        if (window.InspectorTest) {
+            console.warn(message);
+            return;
+        }
+
+        let consoleMessage = new WI.ConsoleMessage(WI.mainTarget, WI.ConsoleMessage.MessageSource.Other, WI.ConsoleMessage.MessageLevel.Warning, message);
+        consoleMessage.shouldRevealConsole = true;
+
+        WI.consoleLogViewController.appendConsoleMessage(consoleMessage);
+    }
+
+    static synthesizeError(message)
+    {
+        message = WI.UIString("Audit Error: %s").format(message);
+
+        if (window.InspectorTest) {
+            console.error(message);
+            return;
+        }
+
+        let consoleMessage = new WI.ConsoleMessage(WI.mainTarget, WI.ConsoleMessage.MessageSource.Other, WI.ConsoleMessage.MessageLevel.Error, message);
+        consoleMessage.shouldRevealConsole = true;
+
+        WI.consoleLogViewController.appendConsoleMessage(consoleMessage);
+    }
+
+    // Public
+
+    get tests() { return this._tests; }
+    get results() { return this._results; }
+    get runningState() { return this._runningState; }
+
+    get editing()
+    {
+        return this._runningState === WI.AuditManager.RunningState.Disabled;
+    }
+
+    set editing(editing)
+    {
+        console.assert(this._runningState === WI.AuditManager.RunningState.Disabled || this._runningState === WI.AuditManager.RunningState.Inactive);
+        if (this._runningState !== WI.AuditManager.RunningState.Disabled && this._runningState !== WI.AuditManager.RunningState.Inactive)
+            return;
+
+        let runningState = editing ? WI.AuditManager.RunningState.Disabled : WI.AuditManager.RunningState.Inactive;
+        console.assert(runningState !== this._runningState);
+        if (runningState === this._runningState)
+            return;
+
+        this._runningState = runningState;
+
+        this.dispatchEventToListeners(WI.AuditManager.Event.EditingChanged);
+
+        if (!this.editing) {
+            WI.objectStores.audits.clear();
+
+            let disabledDefaultTests = [];
+            let saveDisabledDefaultTest = (test) => {
+                if (test.supported && test.disabled)
+                    disabledDefaultTests.push(test.name);
+
+                if (test instanceof WI.AuditTestGroup) {
+                    for (let child of test.tests)
+                        saveDisabledDefaultTest(child);
+                }
+            };
+
+            for (let test of this._tests) {
+                if (test.default)
+                    saveDisabledDefaultTest(test);
+                else
+                    WI.objectStores.audits.putObject(test);
+            }
+
+            this._disabledDefaultTestsSetting.value = disabledDefaultTests;
+        }
+    }
+
+    async start(tests)
+    {
+        console.assert(this._runningState === WI.AuditManager.RunningState.Inactive);
+        if (this._runningState !== WI.AuditManager.RunningState.Inactive)
+            return null;
+
+        if (tests && tests.length)
+            tests = tests.filter((test) => typeof test === "object" && test instanceof WI.AuditTestBase);
+        else
+            tests = this._tests;
+
+        console.assert(tests.length);
+        if (!tests.length)
+            return null;
+
+        let mainResource = WI.networkManager.mainFrame.mainResource;
+
+        this._runningState = WI.AuditManager.RunningState.Active;
+        this.dispatchEventToListeners(WI.AuditManager.Event.RunningStateChanged);
+
+        this._runningTests = tests;
+        for (let test of this._runningTests)
+            test.clearResult();
+
+        this.dispatchEventToListeners(WI.AuditManager.Event.TestScheduled);
+
+        let target = WI.assumingMainTarget();
+
+        await Promise.chain(this._runningTests.map((test) => async () => {
+            if (this._runningState !== WI.AuditManager.RunningState.Active)
+                return;
+
+            if (target.hasDomain("Audit"))
+                await target.AuditAgent.setup();
+
+            let topLevelTest = test.topLevelTest;
+            console.assert(topLevelTest || window.InspectorTest, "No matching top-level test found", test);
+            if (topLevelTest)
+                await topLevelTest.runSetup();
+
+            await test.start();
+
+            if (target.hasDomain("Audit"))
+                await target.AuditAgent.teardown();
+        }));
+
+        let result = this._runningTests.map((test) => test.result).filter((result) => !!result);
+
+        this._runningState = WI.AuditManager.RunningState.Inactive;
+        this.dispatchEventToListeners(WI.AuditManager.Event.RunningStateChanged);
+
+        this._runningTests = [];
+
+        this._addResult(result);
+
+        if (mainResource !== WI.networkManager.mainFrame.mainResource) {
+            // Navigated while tests were running.
+            for (let test of this._tests)
+                test.clearResult();
+        }
+
+        return this._results.lastValue === result ? result : null;
+    }
+
+    stop()
+    {
+        console.assert(this._runningState === WI.AuditManager.RunningState.Active);
+        if (this._runningState !== WI.AuditManager.RunningState.Active)
+            return;
+
+        this._runningState = WI.AuditManager.RunningState.Stopping;
+        this.dispatchEventToListeners(WI.AuditManager.Event.RunningStateChanged);
+
+        for (let test of this._runningTests)
+            test.stop();
+    }
+
+    async processJSON({json, error})
+    {
+        if (error) {
+            WI.AuditManager.synthesizeError(error);
+            return;
+        }
+
+        if (typeof json !== "object" || json === null) {
+            WI.AuditManager.synthesizeError(WI.UIString("invalid JSON"));
+            return;
+        }
+
+        if (json.type !== WI.AuditTestCase.TypeIdentifier && json.type !== WI.AuditTestGroup.TypeIdentifier
+            && json.type !== WI.AuditTestCaseResult.TypeIdentifier && json.type !== WI.AuditTestGroupResult.TypeIdentifier) {
+            WI.AuditManager.synthesizeError(WI.UIString("unknown %s \u0022%s\u0022").format(WI.unlocalizedString("type"), json.type));
+            return;
+        }
+
+        let object = await WI.AuditTestGroup.fromPayload(json) || await WI.AuditTestCase.fromPayload(json) || await WI.AuditTestGroupResult.fromPayload(json) || await WI.AuditTestCaseResult.fromPayload(json);
+        if (!object)
+            return;
+
+        if (object instanceof WI.AuditTestBase)
+            this.addTest(object, {save: true});
+        else if (object instanceof WI.AuditTestResultBase)
+            this._addResult(object);
+
+        WI.showRepresentedObject(object);
+    }
+
+    export(saveMode, object)
+    {
+        console.assert(object instanceof WI.AuditTestCase || object instanceof WI.AuditTestGroup || object instanceof WI.AuditTestCaseResult || object instanceof WI.AuditTestGroupResult, object);
+
+        function dataForObject(object) {
+            return {
+                displayType: object instanceof WI.AuditTestResultBase ? WI.UIString("Result") : WI.UIString("Audit"),
+                content: JSON.stringify(object),
+                suggestedName: object.name + (object instanceof WI.AuditTestResultBase ? ".result" : ".audit"),
+            };
+        }
+
+        let data = [dataForObject(object)];
+
+        if (saveMode === WI.FileUtilities.SaveMode.FileVariants && object instanceof WI.AuditTestBase && object.result)
+            data.push(dataForObject(object.result));
+
+        WI.FileUtilities.save(saveMode, data);
+    }
+
+    loadStoredTests()
+    {
+        if (this._tests.length)
+            return;
+
+        this._addDefaultTests();
+
+        WI.objectStores.audits.getAll().then(async (tests) => {
+            for (let payload of tests) {
+                let test = await WI.AuditTestGroup.fromPayload(payload) || await WI.AuditTestCase.fromPayload(payload);
+                if (!test)
+                    continue;
+
+                const key = null;
+                WI.objectStores.audits.associateObject(test, key, payload);
+
+                this.addTest(test);
+            }
+        });
+    }
+
+    addTest(test, {save} = {})
+    {
+        console.assert(test instanceof WI.AuditTestBase, test);
+        console.assert(!this._tests.includes(test), test);
+
+        this._tests.push(test);
+
+        if (save)
+            WI.objectStores.audits.putObject(test);
+
+        this.dispatchEventToListeners(WI.AuditManager.Event.TestAdded, {test});
+    }
+
+    removeTest(test)
+    {
+        console.assert(this.editing);
+        console.assert(test instanceof WI.AuditTestBase, test);
+        console.assert(this._tests.includes(test) || test.default, test);
+
+        if (test.default) {
+            test.clearResult();
+
+            if (test.disabled) {
+                InspectorFrontendHost.beep();
+                return;
+            }
+
+            test.disabled = true;
+
+            let disabledTests = this._disabledDefaultTestsSetting.value.slice();
+            disabledTests.push(test.name);
+            this._disabledDefaultTestsSetting.value = disabledTests;
+
+            return;
+        }
+
+        console.assert(test.editable, test);
+
+        this._tests.remove(test);
+
+        this.dispatchEventToListeners(WI.AuditManager.Event.TestRemoved, {test});
+
+        WI.objectStores.audits.deleteObject(test);
+    }
+
+    // Private
+
+    _addResult(result)
+    {
+        if (!result || (Array.isArray(result) && !result.length))
+            return;
+
+        this._results.push(result);
+
+        this.dispatchEventToListeners(WI.AuditManager.Event.TestCompleted, {
+            result,
+            index: this._results.length - 1,
+        });
+    }
+
+    _handleFrameMainResourceDidChange(event)
+    {
+        if (!event.target.isMainFrame())
+            return;
+
+        if (this._runningState === WI.AuditManager.RunningState.Active)
+            this.stop();
+        else {
+            for (let test of this._tests)
+                test.clearResult();
+        }
+    }
+
+    _addDefaultTests()
+    {
+        console.assert(WI.DefaultAudits, "Default audits not loaded.");
+        if (!WI.DefaultAudits)
+            return;
+
+        const defaultTests = [
+            new WI.AuditTestGroup(WI.UIString("Demo Audit"), [
+                new WI.AuditTestGroup(WI.UIString("Result Levels"), [
+                    new WI.AuditTestCase("level-pass", WI.DefaultAudits.levelPass.toString(), {description: WI.UIString("This is what the result of a passing test with no data looks like.")}),
+                    new WI.AuditTestCase("level-warn", WI.DefaultAudits.levelWarn.toString(), {description: WI.UIString("This is what the result of a warning test with no data looks like.")}),
+                    new WI.AuditTestCase("level-fail", WI.DefaultAudits.levelFail.toString(), {description: WI.UIString("This is what the result of a failing test with no data looks like.")}),
+                    new WI.AuditTestCase("level-error", WI.DefaultAudits.levelError.toString(), {description: WI.UIString("This is what the result of a test that threw an error with no data looks like.")}),
+                    new WI.AuditTestCase("level-unsupported", WI.DefaultAudits.levelUnsupported.toString(), {description: WI.UIString("This is what the result of an unsupported test with no data looks like.")}),
+                ], {description: WI.UIString("These are all of the different test result levels.")}),
+                new WI.AuditTestGroup(WI.UIString("Result Data"), [
+                    new WI.AuditTestCase("data-domNodes", WI.DefaultAudits.dataDOMNodes.toString(), {description: WI.UIString("This is an example of how result DOM nodes are shown. It will pass with the <body> element.")}),
+                    new WI.AuditTestCase("data-domAttributes", WI.DefaultAudits.dataDOMAttributes.toString(), {description: WI.UIString("This is an example of how result DOM attributes are highlighted on any returned DOM nodes. It will pass with all elements with an id attribute.")}),
+                    new WI.AuditTestCase("data-errors", WI.DefaultAudits.dataErrors.toString(), {description: WI.UIString("This is an example of how errors are shown. The error was thrown manually, but execution errors will appear in the same way.")}),
+                    new WI.AuditTestCase("data-custom", WI.DefaultAudits.dataCustom.toString(), {description: WI.UIString("This is an example of how custom result data is shown."), supports: 3}),
+                ], {description: WI.UIString("These are example tests that demonstrate all of the different types of data that can be returned with the test result.")}),
+                new WI.AuditTestGroup(WI.UIString("Specially Exposed Data"), [
+                    new WI.AuditTestGroup(WI.UIString("Accessibility"), [
+                        new WI.AuditTestCase("getElementsByComputedRole", WI.DefaultAudits.getElementsByComputedRole.toString(), {description: WI.UIString("This is an example test that uses %s to find elements with a computed role of \u201Clink\u201D.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getElementsByComputedRole")), supports: 1}),
+                        new WI.AuditTestCase("getActiveDescendant", WI.DefaultAudits.getActiveDescendant.toString(), {description: WI.UIString("This is an example test that uses %s to find any element that meets criteria for active descendant (\u201C%s\u201D) of the <body> element, if it exists.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getActiveDescendant"), WI.unlocalizedString("aria-activedescendant")), supports: 1}),
+                        new WI.AuditTestCase("getChildNodes", WI.DefaultAudits.getChildNodes.toString(), {description: WI.UIString("This is an example test that uses %s to find child nodes of the <body> element in the accessibility tree.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getChildNodes")), supports: 1}),
+                        new WI.AuditTestCase("getComputedProperties", WI.DefaultAudits.getComputedProperties.toString(), {description: WI.UIString("This is an example test that uses %s to find a variety of accessibility information about the <body> element.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getComputedProperties")), supports: 3}),
+                        new WI.AuditTestCase("getControlledNodes", WI.DefaultAudits.getControlledNodes.toString(), {description: WI.UIString("This is an example test that uses %s to find all nodes controlled (\u201C%s\u201D) by the <body> element, if any exist.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getControlledNodes"), WI.unlocalizedString("aria-controls")), supports: 1}),
+                        new WI.AuditTestCase("getFlowedNodes", WI.DefaultAudits.getFlowedNodes.toString(), {description: WI.UIString("This is an example test that uses %s to find all nodes flowed to (\u201C%s\u201D) from the <body> element, if any exist.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getFlowedNodes"), WI.unlocalizedString("aria-flowto")), supports: 1}),
+                        new WI.AuditTestCase("getMouseEventNode", WI.DefaultAudits.getMouseEventNode.toString(), {description: WI.UIString("This is an example test that uses %s to find the node that would handle mouse events for the <body> element, if applicable.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getMouseEventNode")), supports: 1}),
+                        new WI.AuditTestCase("getOwnedNodes", WI.DefaultAudits.getOwnedNodes.toString(), {description: WI.UIString("This is an example test that uses %s to find all nodes owned (\u201C%s\u201D) by the <body> element, if any exist.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getOwnedNodes"), WI.unlocalizedString("aria-owns")), supports: 1}),
+                        new WI.AuditTestCase("getParentNode", WI.DefaultAudits.getParentNode.toString(), {description: WI.UIString("This is an example test that uses %s to find the parent node of the <body> element in the accessibility tree.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getParentNode")), supports: 1}),
+                        new WI.AuditTestCase("getSelectedChildNodes", WI.DefaultAudits.getSelectedChildNodes.toString(), {description: WI.UIString("This is an example test that uses %s to find all child nodes that are selected (\u201C%s\u201D) of the <body> element in the accessibility tree.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getSelectedChildNodes"), WI.unlocalizedString("aria-selected")), supports: 1}),
+                    ], {description: WI.UIString("These are example tests that demonstrate how to use %s to get information about the accessibility tree.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility")), supports: 1}),
+                    new WI.AuditTestGroup(WI.UIString("DOM"), [
+                        new WI.AuditTestCase("hasEventListeners", WI.DefaultAudits.hasEventListeners.toString(), {description: WI.UIString("This is an example test that uses %s to find data indicating whether the <body> element has any event listeners.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.hasEventListeners")), supports: 3}),
+                        new WI.AuditTestCase("hasEventListeners-click", WI.DefaultAudits.hasEventListenersClick.toString(), {description: WI.UIString("This is an example test that uses %s to find data indicating whether the <body> element has any click event listeners.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.hasEventListenersClick")), supports: 3}),
+                    ], {description: WI.UIString("These are example tests that demonstrate how to use %s to get information about DOM nodes.").format(WI.unlocalizedString("WebInspectorAudit.DOM")), supports: 1}),
+                    new WI.AuditTestGroup(WI.UIString("Resources"), [
+                        new WI.AuditTestCase("getResources", WI.DefaultAudits.getResources.toString(), {description: WI.UIString("This is an example test that uses %s to find basic information about each resource.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getResources")), supports: 3}),
+                        new WI.AuditTestCase("getResourceContent", WI.DefaultAudits.getResourceContent.toString(), {description: WI.UIString("This is an example test that uses %s to find the contents of the main resource.").format(WI.unlocalizedString("WebInspectorAudit.Accessibility.getResourceContent")), supports: 3}),
+                    ], {description: WI.UIString("These are example tests that demonstrate how to use %s to get information about loaded resources.").format(WI.unlocalizedString("WebInspectorAudit.Resources")), supports: 2}),
+                ], {description: WI.UIString("These are example tests that demonstrate how to use %s to access information not normally available to JavaScript.").format(WI.unlocalizedString("WebInspectorAudit")), supports: 1}),
+                new WI.AuditTestCase("unsupported", WI.DefaultAudits.unsupported.toString(), {description: WI.UIString("This is an example of a test that will not run because it is unsupported."), supports: Infinity}),
+            ], {description: WI.UIString("These are example tests that demonstrate the functionality and structure of audits.")}),
+            new WI.AuditTestGroup(WI.UIString("Accessibility"), [
+                new WI.AuditTestCase("testMenuRoleForRequiredChildren", WI.DefaultAudits.testMenuRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D and \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("menu"), WI.unlocalizedString("menubar")), supports: 1}),
+                new WI.AuditTestCase("testGridRoleForRequiredChildren", WI.DefaultAudits.testGridRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("grid")), supports: 1}),
+                new WI.AuditTestCase("testForAriaLabelledBySpelling", WI.DefaultAudits.testForAriaLabelledBySpelling.toString(), {description: WI.UIString("Ensure that \u201C%s\u201D is spelled correctly.").format(WI.unlocalizedString("aria-labelledby")), supports: 1}),
+                new WI.AuditTestCase("testForMultipleBanners", WI.DefaultAudits.testForMultipleBanners.toString(), {description: WI.UIString("Ensure that only one banner is used on the page."), supports: 1}),
+                new WI.AuditTestCase("testForLinkLabels", WI.DefaultAudits.testForLinkLabels.toString(), {description: WI.UIString("Ensure that links have accessible labels for assistive technology."), supports: 1}),
+                new WI.AuditTestCase("testRowGroupRoleForRequiredChildren", WI.DefaultAudits.testRowGroupRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("rowgroup")), supports: 1}),
+                new WI.AuditTestCase("testTableRoleForRequiredChildren", WI.DefaultAudits.testTableRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("table")), supports: 1}),
+                new WI.AuditTestCase("testForMultipleLiveRegions", WI.DefaultAudits.testForMultipleLiveRegions.toString(), {description: WI.UIString("Ensure that only one live region is used on the page."), supports: 1}),
+                new WI.AuditTestCase("testListBoxRoleForRequiredChildren", WI.DefaultAudits.testListBoxRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("listbox")), supports: 1}),
+                new WI.AuditTestCase("testImageLabels", WI.DefaultAudits.testImageLabels.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have accessible labels for assistive technology.").format(WI.unlocalizedString("img")), supports: 1}),
+                new WI.AuditTestCase("testForAriaHiddenFalse", WI.DefaultAudits.testForAriaHiddenFalse.toString(), {description: WI.UIString("Ensure aria-hidden=\u0022%s\u0022 is not used.").format(WI.unlocalizedString("false")), supports: 1}),
+                new WI.AuditTestCase("testTreeRoleForRequiredChildren", WI.DefaultAudits.testTreeRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("tree")), supports: 1}),
+                new WI.AuditTestCase("testRadioGroupRoleForRequiredChildren", WI.DefaultAudits.testRadioGroupRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("radiogroup")), supports: 1}),
+                new WI.AuditTestCase("testFeedRoleForRequiredChildren", WI.DefaultAudits.testFeedRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("feed")), supports: 1}),
+                new WI.AuditTestCase("testTabListRoleForRequiredChildren", WI.DefaultAudits.testTabListRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("tablist")), supports: 1}),
+                new WI.AuditTestCase("testButtonLabels", WI.DefaultAudits.testButtonLabels.toString(), {description: WI.UIString("Ensure that buttons have accessible labels for assistive technology."), supports: 1}),
+                new WI.AuditTestCase("testRowRoleForRequiredChildren", WI.DefaultAudits.testRowRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("row")), supports: 1}),
+                new WI.AuditTestCase("testListRoleForRequiredChildren", WI.DefaultAudits.testListRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("list")), supports: 1}),
+                new WI.AuditTestCase("testComboBoxRoleForRequiredChildren", WI.DefaultAudits.testComboBoxRoleForRequiredChildren.toString(), {description: WI.UIString("Ensure that elements of role \u201C%s\u201D have required owned elements in accordance with WAI-ARIA.").format(WI.unlocalizedString("combobox")), supports: 1}),
+                new WI.AuditTestCase("testForMultipleMainContentSections", WI.DefaultAudits.testForMultipleMainContentSections.toString(), {description: WI.UIString("Ensure that only one main content section is used on the page."), supports: 1}),
+                new WI.AuditTestCase("testDialogsForLabels", WI.DefaultAudits.testDialogsForLabels.toString(), {description: WI.UIString("Ensure that dialogs have accessible labels for assistive technology."), supports: 1}),
+                new WI.AuditTestCase("testForInvalidAriaHiddenValue", WI.DefaultAudits.testForInvalidAriaHiddenValue.toString(), {description: WI.UIString("Ensure that values for \u201C%s\u201D are valid.").format(WI.unlocalizedString("aria-hidden")), supports: 1})
+            ], {description: WI.UIString("Diagnoses common accessibility problems affecting screen readers and other assistive technology.")}),
+        ];
+
+        let checkDisabledDefaultTest = (test) => {
+            test.markAsDefault();
+
+            if (this._disabledDefaultTestsSetting.value.includes(test.name))
+                test.disabled = true;
+
+            if (test instanceof WI.AuditTestGroup) {
+                for (let child of test.tests)
+                    checkDisabledDefaultTest(child);
+            }
+        };
+
+        for (let test of defaultTests) {
+            checkDisabledDefaultTest(test);
+
+            this.addTest(test);
+        }
+    }
+};
+
+WI.AuditManager.RunningState = {
+    Disabled: "disabled",
+    Inactive: "inactive",
+    Active: "active",
+    Stopping: "stopping",
+};
+
+WI.AuditManager.Event = {
+    EditingChanged: "audit-manager-editing-changed",
+    RunningStateChanged: "audit-manager-running-state-changed",
+    TestAdded: "audit-manager-test-added",
+    TestCompleted: "audit-manager-test-completed",
+    TestRemoved: "audit-manager-test-removed",
+    TestScheduled: "audit-manager-test-scheduled",
+};

inspector/Controllers/BasicBlockAnnotator.js

@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ * Copyright (C) 2015 Saam Barati <saambarati1@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BasicBlockAnnotator = class BasicBlockAnnotator extends WI.Annotator
+{
+    constructor(sourceCodeTextEditor, script)
+    {
+        super(sourceCodeTextEditor);
+
+        this._script = script;
+        this._basicBlockMarkers = new Map; // Only contains unexecuted basic blocks.
+    }
+
+    // Protected
+
+    clearAnnotations()
+    {
+        for (var key of this._basicBlockMarkers.keys())
+            this._clearRangeForBasicBlockMarker(key);
+    }
+
+    insertAnnotations()
+    {
+        if (!this.isActive())
+            return;
+        this._script.requestContent().then(this._annotateBasicBlockExecutionRanges.bind(this));
+    }
+
+    // Private
+
+    _calculateBasicBlockPositions(basicBlocks, content)
+    {
+        if (!basicBlocks || !basicBlocks.length)
+            return;
+
+        let lineEndings = [];
+        let lineEndingLengths = [];
+        let pattern = /\r\n?|\n/g;
+        let match = pattern.exec(content);
+        while (match) {
+            lineEndings.push(match.index);
+            lineEndingLengths.push(match[0].length);
+            match = pattern.exec(content);
+        }
+
+        function offsetToPosition(offset) {
+            let lineNumber = lineEndings.upperBound(offset - 1);
+            if (lineNumber) {
+                let previousLine = lineNumber - 1;
+                var columnNumber = offset - lineEndings[previousLine] - lineEndingLengths[previousLine];
+            } else
+                var columnNumber = offset;
+            return new WI.SourceCodePosition(lineNumber, columnNumber);
+        }
+
+        for (let block of basicBlocks) {
+            block.startPosition = offsetToPosition(block.startOffset);
+            block.endPosition = offsetToPosition(block.endOffset);
+        }
+    }
+
+    _annotateBasicBlockExecutionRanges()
+    {
+        let content = this._script.content;
+        console.assert(content, "Missing script content for basic block annotations.");
+        if (!content)
+            return;
+
+        var sourceID = this._script.id;
+        var startTime = Date.now();
+
+        this._script.target.RuntimeAgent.getBasicBlocks(sourceID, function(error, basicBlocks) {
+            if (error) {
+                console.error("Error in getting basic block locations: " + error);
+                return;
+            }
+
+            if (!this.isActive())
+                return;
+
+            this._calculateBasicBlockPositions(basicBlocks, content);
+
+            let {startPosition, endPosition} = this.sourceCodeTextEditor.visibleRangePositions();
+            basicBlocks = basicBlocks.filter(function(block) {
+                // Viewport: [--]
+                // Block:         [--]
+                if (block.startPosition.isAfter(endPosition))
+                    return false;
+
+                // Viewport:      [--]
+                // Block:    [--]
+                if (block.endPosition.isBefore(startPosition))
+                    return false;
+
+                return true;
+            });
+
+            for (var block of basicBlocks) {
+                var key = block.startOffset + ":" + block.endOffset;
+                var hasKey = this._basicBlockMarkers.has(key);
+                var hasExecuted = block.hasExecuted;
+                if (hasKey && hasExecuted)
+                    this._clearRangeForBasicBlockMarker(key);
+                else if (!hasKey && !hasExecuted) {
+                    var marker = this._highlightTextForBasicBlock(block);
+                    this._basicBlockMarkers.set(key, marker);
+                }
+            }
+
+            var totalTime = Date.now() - startTime;
+            var timeoutTime = Number.constrain(30 * totalTime, 500, 5000);
+            this._timeoutIdentifier = setTimeout(this.insertAnnotations.bind(this), timeoutTime);
+        }.bind(this));
+    }
+
+    _highlightTextForBasicBlock(basicBlock)
+    {
+        console.assert(basicBlock.startOffset <= basicBlock.endOffset && basicBlock.startOffset >= 0 && basicBlock.endOffset >= 0, "" + basicBlock.startOffset + ":" + basicBlock.endOffset);
+        console.assert(!basicBlock.hasExecuted);
+
+        let startPosition = this.sourceCodeTextEditor.originalPositionToCurrentPosition(basicBlock.startPosition);
+        let endPosition = this.sourceCodeTextEditor.originalPositionToCurrentPosition(basicBlock.endPosition);
+        if (this._isTextRangeOnlyClosingBrace(startPosition, endPosition))
+            return null;
+
+        return this.sourceCodeTextEditor.addStyleToTextRange(startPosition, endPosition, WI.BasicBlockAnnotator.HasNotExecutedClassName);
+    }
+
+    _isTextRangeOnlyClosingBrace(startPosition, endPosition)
+    {
+        var isOnlyClosingBrace = /^\s*\}$/;
+        return isOnlyClosingBrace.test(this.sourceCodeTextEditor.getTextInRange(startPosition, endPosition));
+    }
+
+    _clearRangeForBasicBlockMarker(key)
+    {
+        console.assert(this._basicBlockMarkers.has(key));
+        var marker = this._basicBlockMarkers.get(key);
+        if (marker)
+            marker.clear();
+        this._basicBlockMarkers.delete(key);
+    }
+};
+
+WI.BasicBlockAnnotator.HasNotExecutedClassName = "basic-block-has-not-executed";

inspector/Controllers/BranchManager.js

@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BranchManager = class BranchManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+
+        this.initialize();
+    }
+
+    // Public
+
+    initialize()
+    {
+        this._originalBranch = new WI.Branch(WI.UIString("Original"), null, true);
+        this._currentBranch = this._originalBranch.fork(WI.UIString("Working Copy"));
+        this._branches = [this._originalBranch, this._currentBranch];
+    }
+
+    get branches()
+    {
+        return this._branches;
+    }
+
+    get currentBranch()
+    {
+        return this._currentBranch;
+    }
+
+    set currentBranch(branch)
+    {
+        console.assert(branch instanceof WI.Branch);
+        if (!(branch instanceof WI.Branch))
+            return;
+
+        this._currentBranch.revert();
+
+        this._currentBranch = branch;
+
+        this._currentBranch.apply();
+    }
+
+    createBranch(displayName, fromBranch)
+    {
+        if (!fromBranch)
+            fromBranch = this._originalBranch;
+
+        console.assert(fromBranch instanceof WI.Branch);
+        if (!(fromBranch instanceof WI.Branch))
+            return null;
+
+        var newBranch = fromBranch.fork(displayName);
+        this._branches.push(newBranch);
+        return newBranch;
+    }
+
+    deleteBranch(branch)
+    {
+        console.assert(branch instanceof WI.Branch);
+        if (!(branch instanceof WI.Branch))
+            return;
+
+        console.assert(branch !== this._originalBranch);
+        if (branch === this._originalBranch)
+            return;
+
+        this._branches.remove(branch);
+
+        if (branch === this._currentBranch)
+            this._currentBranch = this._originalBranch;
+    }
+
+    // Private
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (!event.target.isMainFrame())
+            return;
+
+        this.initialize();
+    }
+};

inspector/Controllers/BreakpointLogMessageLexer.js

@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BreakpointLogMessageLexer = class BreakpointLogMessageLexer extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._stateFunctions = {
+            [WI.BreakpointLogMessageLexer.State.Expression]: this._expression,
+            [WI.BreakpointLogMessageLexer.State.PlainText]: this._plainText,
+            [WI.BreakpointLogMessageLexer.State.PossiblePlaceholder]: this._possiblePlaceholder,
+            [WI.BreakpointLogMessageLexer.State.RegExpOrStringLiteral]: this._regExpOrStringLiteral,
+        };
+
+        this.reset();
+    }
+
+    // Public
+
+    tokenize(input)
+    {
+        this.reset();
+        this._input = input;
+
+        while (this._index < this._input.length) {
+            let stateFunction = this._stateFunctions[this._states.lastValue];
+            console.assert(stateFunction);
+            if (!stateFunction) {
+                this.reset();
+                return null;
+            }
+
+            stateFunction.call(this);
+        }
+
+        // Needed for trailing plain text.
+        this._finishPlainText();
+
+        return this._tokens;
+    }
+
+    reset()
+    {
+        this._input = "";
+        this._buffer = "";
+
+        this._index = 0;
+        this._states = [WI.BreakpointLogMessageLexer.State.PlainText];
+        this._literalStartCharacter = "";
+        this._curlyBraceDepth = 0;
+        this._tokens = [];
+    }
+
+    // Private
+
+     _finishPlainText()
+    {
+        this._appendToken(WI.BreakpointLogMessageLexer.TokenType.PlainText);
+    }
+
+    _finishExpression()
+    {
+        this._appendToken(WI.BreakpointLogMessageLexer.TokenType.Expression);
+    }
+
+    _appendToken(type)
+    {
+        if (!this._buffer)
+            return;
+
+        this._tokens.push({type, data: this._buffer});
+        this._buffer = "";
+    }
+
+    _consume()
+    {
+        console.assert(this._index < this._input.length);
+
+        let character = this._peek();
+        this._index++;
+        return character;
+    }
+
+    _peek()
+    {
+        return this._input[this._index] || null;
+    }
+
+    // States
+
+    _expression()
+    {
+        let character = this._consume();
+
+        if (character === "}") {
+            if (this._curlyBraceDepth === 0) {
+                this._finishExpression();
+
+                console.assert(this._states.lastValue === WI.BreakpointLogMessageLexer.State.Expression);
+                this._states.pop();
+                return;
+            }
+
+            this._curlyBraceDepth--;
+        }
+
+        this._buffer += character;
+
+        if (character === "/" || character === "\"" || character === "'") {
+            this._literalStartCharacter = character;
+            this._states.push(WI.BreakpointLogMessageLexer.State.RegExpOrStringLiteral);
+        } else if (character === "{")
+            this._curlyBraceDepth++;
+    }
+
+    _plainText()
+    {
+        let character = this._peek();
+
+        if (character === "$")
+            this._states.push(WI.BreakpointLogMessageLexer.State.PossiblePlaceholder);
+        else {
+            this._buffer += character;
+            this._consume();
+        }
+    }
+
+    _possiblePlaceholder()
+    {
+        let character = this._consume();
+        console.assert(character === "$");
+        let nextCharacter = this._peek();
+
+        console.assert(this._states.lastValue === WI.BreakpointLogMessageLexer.State.PossiblePlaceholder);
+        this._states.pop();
+
+        if (nextCharacter === "{") {
+            this._finishPlainText();
+            this._consume();
+            this._states.push(WI.BreakpointLogMessageLexer.State.Expression);
+        } else
+            this._buffer += character;
+    }
+
+    _regExpOrStringLiteral()
+    {
+        let character = this._consume();
+        this._buffer += character;
+
+        if (character === "\\") {
+            if (this._peek() !== null)
+                this._buffer += this._consume();
+            return;
+        }
+
+        if (character === this._literalStartCharacter) {
+            console.assert(this._states.lastValue === WI.BreakpointLogMessageLexer.State.RegExpOrStringLiteral);
+            this._states.pop();
+        }
+    }
+};
+
+WI.BreakpointLogMessageLexer.State = {
+    Expression: Symbol("expression"),
+    PlainText: Symbol("plain-text"),
+    PossiblePlaceholder: Symbol("possible-placeholder"),
+    RegExpOrStringLiteral: Symbol("regexp-or-string-literal"),
+};
+
+WI.BreakpointLogMessageLexer.TokenType = {
+    PlainText: "token-type-plain-text",
+    Expression: "token-type-expression",
+};

inspector/Controllers/BreakpointPopoverController.js

@@ -0,0 +1,381 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BreakpointPopoverController = class BreakpointPopoverController extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._breakpoint = null;
+        this._popover = null;
+        this._popoverContentElement = null;
+    }
+
+    // Public
+
+    appendContextMenuItems(contextMenu, breakpoint, breakpointDisplayElement)
+    {
+        console.assert(document.body.contains(breakpointDisplayElement), "Breakpoint popover display element must be in the DOM.");
+
+        const editBreakpoint = () => {
+            console.assert(!this._popover, "Breakpoint popover already exists.");
+            if (this._popover)
+                return;
+
+            this._createPopoverContent(breakpoint);
+            this._popover = new WI.Popover(this);
+            this._popover.content = this._popoverContentElement;
+
+            let bounds = WI.Rect.rectFromClientRect(breakpointDisplayElement.getBoundingClientRect());
+            bounds.origin.x -= 1; // Move the anchor left one pixel so it looks more centered.
+            this._popover.present(bounds.pad(2), [WI.RectEdge.MAX_Y]);
+        };
+
+        const removeBreakpoint = () => {
+            WI.debuggerManager.removeBreakpoint(breakpoint);
+        };
+
+        const toggleBreakpoint = () => {
+            breakpoint.disabled = !breakpoint.disabled;
+        };
+
+        const toggleAutoContinue = () => {
+            breakpoint.autoContinue = !breakpoint.autoContinue;
+        };
+
+        const revealOriginalSourceCodeLocation = () => {
+            const options = {
+                ignoreNetworkTab: true,
+                ignoreSearchTab: true,
+            };
+            WI.showOriginalOrFormattedSourceCodeLocation(breakpoint.sourceCodeLocation, options);
+        };
+
+        if (WI.debuggerManager.isBreakpointEditable(breakpoint))
+            contextMenu.appendItem(WI.UIString("Edit Breakpoint\u2026"), editBreakpoint);
+
+        if (breakpoint.autoContinue && !breakpoint.disabled) {
+            contextMenu.appendItem(WI.UIString("Disable Breakpoint"), toggleBreakpoint);
+            contextMenu.appendItem(WI.UIString("Cancel Automatic Continue"), toggleAutoContinue);
+        } else if (!breakpoint.disabled)
+            contextMenu.appendItem(WI.UIString("Disable Breakpoint"), toggleBreakpoint);
+        else
+            contextMenu.appendItem(WI.UIString("Enable Breakpoint"), toggleBreakpoint);
+
+        if (!breakpoint.autoContinue && !breakpoint.disabled && breakpoint.actions.length)
+            contextMenu.appendItem(WI.UIString("Set to Automatically Continue"), toggleAutoContinue);
+
+        if (WI.debuggerManager.isBreakpointRemovable(breakpoint))
+            contextMenu.appendItem(WI.UIString("Delete Breakpoint"), removeBreakpoint);
+
+        if (breakpoint._sourceCodeLocation.hasMappedLocation()) {
+            contextMenu.appendSeparator();
+            contextMenu.appendItem(WI.UIString("Reveal in Original Resource"), revealOriginalSourceCodeLocation);
+        }
+    }
+
+    // CodeMirrorCompletionController delegate
+
+    completionControllerShouldAllowEscapeCompletion()
+    {
+        return false;
+    }
+
+    // Private
+
+    _createPopoverContent(breakpoint)
+    {
+        console.assert(!this._popoverContentElement, "Popover content element already exists.");
+        if (this._popoverContentElement)
+            return;
+
+        this._breakpoint = breakpoint;
+        this._popoverContentElement = document.createElement("div");
+        this._popoverContentElement.className = "edit-breakpoint-popover-content";
+
+        let checkboxElement = document.createElement("input");
+        checkboxElement.type = "checkbox";
+        checkboxElement.checked = !this._breakpoint.disabled;
+        checkboxElement.addEventListener("change", this._popoverToggleEnabledCheckboxChanged.bind(this));
+
+        let checkboxLabel = document.createElement("label");
+        checkboxLabel.className = "toggle";
+        checkboxLabel.appendChild(checkboxElement);
+        checkboxLabel.append(this._breakpoint.sourceCodeLocation.displayLocationString());
+
+        let table = document.createElement("table");
+
+        let conditionRow = table.appendChild(document.createElement("tr"));
+        let conditionHeader = conditionRow.appendChild(document.createElement("th"));
+        let conditionData = conditionRow.appendChild(document.createElement("td"));
+        let conditionLabel = conditionHeader.appendChild(document.createElement("label"));
+        conditionLabel.textContent = WI.UIString("Condition");
+        let conditionEditorElement = conditionData.appendChild(document.createElement("div"));
+        conditionEditorElement.classList.add("edit-breakpoint-popover-condition", WI.SyntaxHighlightedStyleClassName);
+
+        this._conditionCodeMirror = WI.CodeMirrorEditor.create(conditionEditorElement, {
+            extraKeys: {Tab: false},
+            lineWrapping: false,
+            mode: "text/javascript",
+            matchBrackets: true,
+            placeholder: WI.UIString("Conditional expression"),
+            scrollbarStyle: null,
+            value: this._breakpoint.condition || "",
+        });
+
+        let conditionCodeMirrorInputField = this._conditionCodeMirror.getInputField();
+        conditionCodeMirrorInputField.id = "codemirror-condition-input-field";
+        conditionLabel.setAttribute("for", conditionCodeMirrorInputField.id);
+
+        this._conditionCodeMirrorEscapeOrEnterKeyHandler = this._conditionCodeMirrorEscapeOrEnterKey.bind(this);
+        this._conditionCodeMirror.addKeyMap({
+            "Esc": this._conditionCodeMirrorEscapeOrEnterKeyHandler,
+            "Enter": this._conditionCodeMirrorEscapeOrEnterKeyHandler,
+        });
+
+        this._conditionCodeMirror.on("change", this._conditionCodeMirrorChanged.bind(this));
+        this._conditionCodeMirror.on("beforeChange", this._conditionCodeMirrorBeforeChange.bind(this));
+
+        let completionController = new WI.CodeMirrorCompletionController(this._conditionCodeMirror, this);
+        completionController.addExtendedCompletionProvider("javascript", WI.javaScriptRuntimeCompletionProvider);
+
+        // CodeMirror needs a refresh after the popover displays, to layout, otherwise it doesn't appear.
+        setTimeout(() => {
+            this._conditionCodeMirror.refresh();
+            this._conditionCodeMirror.focus();
+        }, 0);
+
+        // COMPATIBILITY (iOS 9): Legacy backends don't support breakpoint ignore count. Since support
+        // can't be tested directly, check for CSS.getSupportedSystemFontFamilyNames.
+        // FIXME: Use explicit version checking once https://webkit.org/b/148680 is fixed.
+        if (InspectorBackend.domains.CSS.getSupportedSystemFontFamilyNames) {
+            let ignoreCountRow = table.appendChild(document.createElement("tr"));
+            let ignoreCountHeader = ignoreCountRow.appendChild(document.createElement("th"));
+            let ignoreCountLabel = ignoreCountHeader.appendChild(document.createElement("label"));
+            let ignoreCountData = ignoreCountRow.appendChild(document.createElement("td"));
+            this._ignoreCountInput = ignoreCountData.appendChild(document.createElement("input"));
+            this._ignoreCountInput.id = "edit-breakpoint-popover-ignore";
+            this._ignoreCountInput.type = "number";
+            this._ignoreCountInput.min = 0;
+            this._ignoreCountInput.value = 0;
+            this._ignoreCountInput.addEventListener("change", this._popoverIgnoreInputChanged.bind(this));
+
+            ignoreCountLabel.setAttribute("for", this._ignoreCountInput.id);
+            ignoreCountLabel.textContent = WI.UIString("Ignore");
+
+            this._ignoreCountText = ignoreCountData.appendChild(document.createElement("span"));
+            this._updateIgnoreCountText();
+        }
+
+        let actionRow = table.appendChild(document.createElement("tr"));
+        let actionHeader = actionRow.appendChild(document.createElement("th"));
+        let actionData = this._actionsContainer = actionRow.appendChild(document.createElement("td"));
+        let actionLabel = actionHeader.appendChild(document.createElement("label"));
+        actionLabel.textContent = WI.UIString("Action");
+
+        if (!this._breakpoint.actions.length)
+            this._popoverActionsCreateAddActionButton();
+        else {
+            this._popoverContentElement.classList.add(WI.BreakpointPopoverController.WidePopoverClassName);
+            for (let i = 0; i < this._breakpoint.actions.length; ++i) {
+                let breakpointActionView = new WI.BreakpointActionView(this._breakpoint.actions[i], this, true);
+                this._popoverActionsInsertBreakpointActionView(breakpointActionView, i);
+            }
+        }
+
+        let optionsRow = this._popoverOptionsRowElement = table.appendChild(document.createElement("tr"));
+        if (!this._breakpoint.actions.length)
+            optionsRow.classList.add(WI.BreakpointPopoverController.HiddenStyleClassName);
+        let optionsHeader = optionsRow.appendChild(document.createElement("th"));
+        let optionsData = optionsRow.appendChild(document.createElement("td"));
+        let optionsLabel = optionsHeader.appendChild(document.createElement("label"));
+        let optionsCheckbox = this._popoverOptionsCheckboxElement = optionsData.appendChild(document.createElement("input"));
+        let optionsCheckboxLabel = optionsData.appendChild(document.createElement("label"));
+        optionsCheckbox.id = "edit-breakpoint-popover-auto-continue";
+        optionsCheckbox.type = "checkbox";
+        optionsCheckbox.checked = this._breakpoint.autoContinue;
+        optionsCheckbox.addEventListener("change", this._popoverToggleAutoContinueCheckboxChanged.bind(this));
+        optionsLabel.textContent = WI.UIString("Options");
+        optionsCheckboxLabel.setAttribute("for", optionsCheckbox.id);
+        optionsCheckboxLabel.textContent = WI.UIString("Automatically continue after evaluating");
+
+        this._popoverContentElement.appendChild(checkboxLabel);
+        this._popoverContentElement.appendChild(table);
+    }
+
+    _popoverToggleEnabledCheckboxChanged(event)
+    {
+        this._breakpoint.disabled = !event.target.checked;
+    }
+
+    _conditionCodeMirrorChanged(codeMirror, change)
+    {
+        this._breakpoint.condition = (codeMirror.getValue() || "").trim();
+    }
+
+    _conditionCodeMirrorBeforeChange(codeMirror, change)
+    {
+        if (change.update) {
+            let newText = change.text.join("").replace(/\n/g, "");
+            change.update(change.from, change.to, [newText]);
+        }
+
+        return true;
+    }
+
+    _conditionCodeMirrorEscapeOrEnterKey()
+    {
+        if (!this._popover)
+            return;
+
+        this._popover.dismiss();
+    }
+
+    _popoverIgnoreInputChanged(event)
+    {
+        let ignoreCount = 0;
+        if (event.target.value) {
+            ignoreCount = parseInt(event.target.value, 10);
+            if (isNaN(ignoreCount) || ignoreCount < 0)
+                ignoreCount = 0;
+        }
+
+        this._ignoreCountInput.value = ignoreCount;
+        this._breakpoint.ignoreCount = ignoreCount;
+
+        this._updateIgnoreCountText();
+    }
+
+    _popoverToggleAutoContinueCheckboxChanged(event)
+    {
+        this._breakpoint.autoContinue = event.target.checked;
+    }
+
+    _popoverActionsCreateAddActionButton()
+    {
+        this._popoverContentElement.classList.remove(WI.BreakpointPopoverController.WidePopoverClassName);
+        this._actionsContainer.removeChildren();
+
+        let addActionButton = this._actionsContainer.appendChild(document.createElement("button"));
+        addActionButton.textContent = WI.UIString("Add Action");
+        addActionButton.addEventListener("click", this._popoverActionsAddActionButtonClicked.bind(this));
+    }
+
+    _popoverActionsAddActionButtonClicked(event)
+    {
+        this._popoverContentElement.classList.add(WI.BreakpointPopoverController.WidePopoverClassName);
+        this._actionsContainer.removeChildren();
+
+        let newAction = this._breakpoint.createAction(WI.BreakpointAction.Type.Log);
+        let newBreakpointActionView = new WI.BreakpointActionView(newAction, this);
+        this._popoverActionsInsertBreakpointActionView(newBreakpointActionView, -1);
+        this._popoverOptionsRowElement.classList.remove(WI.BreakpointPopoverController.HiddenStyleClassName);
+        this._popover.update();
+    }
+
+    _popoverActionsInsertBreakpointActionView(breakpointActionView, index)
+    {
+        if (index === -1)
+            this._actionsContainer.appendChild(breakpointActionView.element);
+        else {
+            let nextElement = this._actionsContainer.children[index + 1] || null;
+            this._actionsContainer.insertBefore(breakpointActionView.element, nextElement);
+        }
+    }
+
+    _updateIgnoreCountText()
+    {
+        if (this._breakpoint.ignoreCount === 1)
+            this._ignoreCountText.textContent = WI.UIString("time before stopping");
+        else
+            this._ignoreCountText.textContent = WI.UIString("times before stopping");
+    }
+
+    breakpointActionViewAppendActionView(breakpointActionView, newAction)
+    {
+        let newBreakpointActionView = new WI.BreakpointActionView(newAction, this);
+
+        let index = 0;
+        let children = this._actionsContainer.children;
+        for (let i = 0; children.length; ++i) {
+            if (children[i] === breakpointActionView.element) {
+                index = i;
+                break;
+            }
+        }
+
+        this._popoverActionsInsertBreakpointActionView(newBreakpointActionView, index);
+        this._popoverOptionsRowElement.classList.remove(WI.BreakpointPopoverController.HiddenStyleClassName);
+
+        this._popover.update();
+    }
+
+    breakpointActionViewRemoveActionView(breakpointActionView)
+    {
+        breakpointActionView.element.remove();
+
+        if (!this._actionsContainer.children.length) {
+            this._popoverActionsCreateAddActionButton();
+            this._popoverOptionsRowElement.classList.add(WI.BreakpointPopoverController.HiddenStyleClassName);
+            this._popoverOptionsCheckboxElement.checked = false;
+        }
+
+        this._popover.update();
+    }
+
+    breakpointActionViewResized(breakpointActionView)
+    {
+        this._popover.update();
+    }
+
+    willDismissPopover(popover)
+    {
+        console.assert(this._popover === popover);
+        this._popoverContentElement = null;
+        this._popoverOptionsRowElement = null;
+        this._popoverOptionsCheckboxElement = null;
+        this._actionsContainer = null;
+        this._popover = null;
+    }
+
+    didDismissPopover(popover)
+    {
+        // Remove Evaluate and Probe actions that have no data.
+        let emptyActions = this._breakpoint.actions.filter(function(action) {
+            if (action.type !== WI.BreakpointAction.Type.Evaluate && action.type !== WI.BreakpointAction.Type.Probe)
+                return false;
+            return !(action.data && action.data.trim());
+        });
+
+        for (let action of emptyActions)
+            this._breakpoint.removeAction(action);
+
+        this._breakpoint = null;
+    }
+};
+
+WI.BreakpointPopoverController.WidePopoverClassName = "wide";
+WI.BreakpointPopoverController.HiddenStyleClassName = "hidden";

inspector/Controllers/BrowserManager.js

@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2020 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.BrowserManager = class BrowserManager
+{
+    constructor()
+    {
+        this._enabled = false;
+        this._extensionNameIdentifierMap = new Map;
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        // COMPATIBILITY (iOS 13.4): Browser did not exist yet.
+        if (target.hasDomain("Browser"))
+            target.BrowserAgent.enable();
+    }
+
+    // Public
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        for (let target of WI.targetManager.allTargets)
+            this.initializeTarget(target);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        for (let target of WI.targetManager.allTargets) {
+            // COMPATIBILITY (iOS 13.4): Browser did not exist yet.
+            if (target.hasDomain("Browser"))
+                target.BrowserAgent.disable();
+        }
+
+        this._extensionNameIdentifierMap.clear();
+
+        this._enabled = false;
+    }
+
+    isExtensionScheme(scheme)
+    {
+        return scheme && scheme.endsWith("-extension");
+    }
+
+    extensionNameForId(extensionId)
+    {
+        return this._extensionNameIdentifierMap.get(extensionId) || null;
+    }
+
+    extensionNameForURL(url)
+    {
+        console.assert(this.isExtensionScheme(parseURL(url).scheme));
+
+        let match = url.match(/^[a-z\-]*extension:\/\/([0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12})\//);
+        if (!match)
+            return null;
+
+        return this.extensionNameForId(match[1]);
+    }
+
+    extensionNameForExecutionContext(context)
+    {
+        console.assert(context instanceof WI.ExecutionContext);
+        console.assert(context.type === WI.ExecutionContext.Type.User);
+
+        let match = context.name.match(/^[A-Za-z]*ExtensionWorld-([0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12})$/);
+        if (!match)
+            return null;
+
+        return this.extensionNameForId(match[1]);
+    }
+
+    // BrowserObserver
+
+    extensionsEnabled(extensions)
+    {
+        for (let {extensionId, name} of extensions) {
+            console.assert(!this._extensionNameIdentifierMap.has(extensionId), `Extension already exists with id '${extensionId}'.`);
+
+            this._extensionNameIdentifierMap.set(extensionId, name);
+        }
+    }
+
+    extensionsDisabled(extensionIds)
+    {
+        for (let extensionId of extensionIds) {
+            let name = this._extensionNameIdentifierMap.take(extensionId);
+            console.assert(name, `Missing extension with id '${extensionId}'.`);
+        }
+    }
+};

inspector/Controllers/CSSManager.js

@@ -0,0 +1,894 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: CSSManager lacks advanced multi-target support. (Stylesheets per-target)
+
+WI.CSSManager = class CSSManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.addEventListener(WI.Frame.Event.ResourceWasAdded, this._resourceAdded, this);
+        WI.Resource.addEventListener(WI.SourceCode.Event.ContentDidChange, this._resourceContentDidChange, this);
+        WI.Resource.addEventListener(WI.Resource.Event.TypeDidChange, this._resourceTypeDidChange, this);
+
+        WI.DOMNode.addEventListener(WI.DOMNode.Event.AttributeModified, this._nodeAttributesDidChange, this);
+        WI.DOMNode.addEventListener(WI.DOMNode.Event.AttributeRemoved, this._nodeAttributesDidChange, this);
+        WI.DOMNode.addEventListener(WI.DOMNode.Event.EnabledPseudoClassesChanged, this._nodePseudoClassesDidChange, this);
+
+        this._colorFormatSetting = new WI.Setting("default-color-format", WI.Color.Format.Original);
+
+        this._styleSheetIdentifierMap = new Map;
+        this._styleSheetFrameURLMap = new Map;
+        this._nodeStylesMap = {};
+        this._modifiedStyles = new Map;
+        this._defaultUserPreferences = new Map;
+        this._overridenUserPreferences = new Map;
+        this._propertyNameCompletions = null;
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (target.hasDomain("CSS"))
+            target.CSSAgent.enable();
+    }
+
+    initializeCSSPropertyNameCompletions(target)
+    {
+        console.assert(target.hasDomain("CSS"));
+
+        if (this._propertyNameCompletions)
+            return;
+
+        target.CSSAgent.getSupportedCSSProperties((error, cssProperties) => {
+            if (error)
+                return;
+
+            this._propertyNameCompletions = new WI.CSSPropertyNameCompletions(cssProperties);
+
+            WI.CSSKeywordCompletions.addCustomCompletions(cssProperties);
+
+            // CodeMirror is not included by tests so we shouldn't assume it always exists.
+            // If it isn't available we skip MIME type associations.
+            if (!window.CodeMirror)
+                return;
+
+            let propertyNamesForCodeMirror = {};
+            let valueKeywordsForCodeMirror = {"inherit": true, "initial": true, "unset": true, "revert": true, "revert-layer": true, "var": true, "env": true};
+            let colorKeywordsForCodeMirror = {};
+
+            function nameForCodeMirror(name) {
+                // CodeMirror parses the vendor prefix separate from the property or keyword name,
+                // so we need to strip vendor prefixes from our names. Also strip function parenthesis.
+                return name.replace(/^-[^-]+-/, "").replace(/\(\)$/, "").toLowerCase();
+            }
+
+            for (let property of cssProperties) {
+                // Properties can also be value keywords, like when used in a transition.
+                // So we add them to both lists.
+                let codeMirrorPropertyName = nameForCodeMirror(property.name);
+                propertyNamesForCodeMirror[codeMirrorPropertyName] = true;
+                valueKeywordsForCodeMirror[codeMirrorPropertyName] = true;
+            }
+
+            for (let propertyName in WI.CSSKeywordCompletions._propertyKeywordMap) {
+                let keywords = WI.CSSKeywordCompletions._propertyKeywordMap[propertyName];
+                for (let keyword of keywords) {
+                    // Skip numbers, like the ones defined for font-weight.
+                    if (keyword === WI.CSSKeywordCompletions.AllPropertyNamesPlaceholder || !isNaN(Number(keyword)))
+                        continue;
+                    valueKeywordsForCodeMirror[nameForCodeMirror(keyword)] = true;
+                }
+            }
+
+            for (let color of WI.CSSKeywordCompletions._colors)
+                colorKeywordsForCodeMirror[nameForCodeMirror(color)] = true;
+
+            // TODO: Remove these keywords once they are built-in codemirror or once we get values from WebKit itself.
+            valueKeywordsForCodeMirror["conic-gradient"] = true;
+            valueKeywordsForCodeMirror["repeating-conic-gradient"] = true;
+
+            function updateCodeMirrorCSSMode(mimeType) {
+                let modeSpec = CodeMirror.resolveMode(mimeType);
+
+                console.assert(modeSpec.propertyKeywords);
+                console.assert(modeSpec.valueKeywords);
+                console.assert(modeSpec.colorKeywords);
+
+                modeSpec.propertyKeywords = propertyNamesForCodeMirror;
+                modeSpec.valueKeywords = valueKeywordsForCodeMirror;
+                modeSpec.colorKeywords = colorKeywordsForCodeMirror;
+
+                CodeMirror.defineMIME(mimeType, modeSpec);
+            }
+
+            updateCodeMirrorCSSMode("text/css");
+            updateCodeMirrorCSSMode("text/x-scss");
+        });
+
+        if (target.hasCommand("CSS.getSupportedSystemFontFamilyNames")) {
+            target.CSSAgent.getSupportedSystemFontFamilyNames((error, fontFamilyNames) =>{
+                if (error)
+                    return;
+
+                WI.CSSKeywordCompletions.addPropertyCompletionValues("font-family", fontFamilyNames);
+                WI.CSSKeywordCompletions.addPropertyCompletionValues("font", fontFamilyNames);
+            });
+        }
+    }
+
+    // Static
+
+    static supportsInspectorStyleSheet()
+    {
+        return InspectorBackend.hasCommand("CSS.createStyleSheet");
+    }
+
+    static protocolStyleSheetOriginToEnum(origin)
+    {
+        switch (origin) {
+        case InspectorBackend.Enum.CSS.StyleSheetOrigin.User:
+            return WI.CSSStyleSheet.Type.User;
+
+        case InspectorBackend.Enum.CSS.StyleSheetOrigin.UserAgent:
+            return WI.CSSStyleSheet.Type.UserAgent;
+
+        case InspectorBackend.Enum.CSS.StyleSheetOrigin.Inspector:
+            return WI.CSSStyleSheet.Type.Inspector;
+        }
+
+        // COMPATIBILITY (iOS 14): CSS.StyleSheetOrigin.Regular was replaced with CSS.StyleSheetOrigin.Author.
+        console.assert(!InspectorBackend.Enum.CSS.StyleSheetOrigin.Author || origin === InspectorBackend.Enum.CSS.StyleSheetOrigin.Author);
+        console.assert(!InspectorBackend.Enum.CSS.StyleSheetOrigin.Regular || origin === InspectorBackend.Enum.CSS.StyleSheetOrigin.Regular);
+        return WI.CSSStyleSheet.Type.Author;
+    }
+
+    static protocolGroupingTypeToEnum(type)
+    {
+        // COMPATIBILITY (iOS 13): CSS.Grouping did not exist yet.
+        if (!InspectorBackend.Enum.CSS.Grouping) {
+            switch (type) {
+            case "mediaRule":
+                return WI.CSSGrouping.Type.MediaRule;
+            case "importRule":
+                return WI.CSSGrouping.Type.MediaImportRule;
+            case "linkedSheet":
+                return WI.CSSGrouping.Type.MediaLinkNode;
+            case "inlineSheet":
+                return WI.CSSGrouping.Type.MediaStyleNode;
+            }
+        }
+        return type;
+    }
+
+    static displayNameForPseudoId(pseudoId)
+    {
+        // Compatibility (iOS 12.2): CSS.PseudoId did not exist.
+        if (!InspectorBackend.Enum.CSS.PseudoId) {
+            switch (pseudoId) {
+            case 1: // PseudoId.FirstLine
+                return WI.unlocalizedString("::first-line");
+            case 2: // PseudoId.FirstLetter
+                return WI.unlocalizedString("::first-letter");
+            case 3: // PseudoId.Marker
+                return WI.unlocalizedString("::marker");
+            case 4: // PseudoId.Before
+                return WI.unlocalizedString("::before");
+            case 5: // PseudoId.After
+                return WI.unlocalizedString("::after");
+            case 6: // PseudoId.Selection
+                return WI.unlocalizedString("::selection");
+            case 7: // PseudoId.Scrollbar
+                return WI.unlocalizedString("::scrollbar");
+            case 8: // PseudoId.ScrollbarThumb
+                return WI.unlocalizedString("::scrollbar-thumb");
+            case 9: // PseudoId.ScrollbarButton
+                return WI.unlocalizedString("::scrollbar-button");
+            case 10: // PseudoId.ScrollbarTrack
+                return WI.unlocalizedString("::scrollbar-track");
+            case 11: // PseudoId.ScrollbarTrackPiece
+                return WI.unlocalizedString("::scrollbar-track-piece");
+            case 12: // PseudoId.ScrollbarCorner
+                return WI.unlocalizedString("::scrollbar-corner");
+            case 13: // PseudoId.Resizer
+                return WI.unlocalizedString("::resizer");
+
+            default:
+                console.error("Unknown pseudo id", pseudoId);
+                return "";
+            }
+        }
+
+        switch (pseudoId) {
+        case CSSManager.PseudoSelectorNames.FirstLine:
+            return WI.unlocalizedString("::first-line");
+        case CSSManager.PseudoSelectorNames.FirstLetter:
+            return WI.unlocalizedString("::first-letter");
+        case CSSManager.PseudoSelectorNames.Highlight:
+            return WI.unlocalizedString("::highlight");
+        case CSSManager.PseudoSelectorNames.Marker:
+            return WI.unlocalizedString("::marker");
+        case CSSManager.PseudoSelectorNames.Before:
+            return WI.unlocalizedString("::before");
+        case CSSManager.PseudoSelectorNames.After:
+            return WI.unlocalizedString("::after");
+        case CSSManager.PseudoSelectorNames.Selection:
+            return WI.unlocalizedString("::selection");
+        case CSSManager.PseudoSelectorNames.Backdrop:
+            return WI.unlocalizedString("::backdrop");
+        case CSSManager.PseudoSelectorNames.Scrollbar:
+            return WI.unlocalizedString("::scrollbar");
+        case CSSManager.PseudoSelectorNames.ScrollbarThumb:
+            return WI.unlocalizedString("::scrollbar-thumb");
+        case CSSManager.PseudoSelectorNames.ScrollbarButton:
+            return WI.unlocalizedString("::scrollbar-button");
+        case CSSManager.PseudoSelectorNames.ScrollbarTrack:
+            return WI.unlocalizedString("::scrollbar-track");
+        case CSSManager.PseudoSelectorNames.ScrollbarTrackPiece:
+            return WI.unlocalizedString("::scrollbar-track-piece");
+        case CSSManager.PseudoSelectorNames.ScrollbarCorner:
+            return WI.unlocalizedString("::scrollbar-corner");
+        case CSSManager.PseudoSelectorNames.Resizer:
+            return WI.unlocalizedString("::resizer");
+
+        default:
+            console.error("Unknown pseudo id", pseudoId);
+            return "";
+        }
+    }
+
+    static displayNameForForceablePseudoClass(pseudoClass)
+    {
+        switch (pseudoClass) {
+        case WI.CSSManager.ForceablePseudoClass.Active:
+            return WI.unlocalizedString(":active");
+        case WI.CSSManager.ForceablePseudoClass.Focus:
+            return WI.unlocalizedString(":focus");
+        case WI.CSSManager.ForceablePseudoClass.FocusVisible:
+            return WI.unlocalizedString(":focus-visible");
+        case WI.CSSManager.ForceablePseudoClass.FocusWithin:
+            return WI.unlocalizedString(":focus-within");
+        case WI.CSSManager.ForceablePseudoClass.Hover:
+            return WI.unlocalizedString(":hover");
+        case WI.CSSManager.ForceablePseudoClass.Target:
+            return WI.unlocalizedString(":target");
+        case WI.CSSManager.ForceablePseudoClass.Visited:
+            return WI.unlocalizedString(":visited");
+        }
+
+        console.assert(false, "Unknown pseudo class", pseudoClass);
+        return "";
+    }
+
+    // Public
+
+    get propertyNameCompletions() { return this._propertyNameCompletions; }
+
+    get overridenUserPreferences() { return this._overridenUserPreferences; }
+
+    get defaultUserPreferences() { return this._defaultUserPreferences; }
+
+    get overridenUserPreferences() { return this._overridenUserPreferences; }
+
+    get preferredColorFormat()
+    {
+        return this._colorFormatSetting.value;
+    }
+
+    get styleSheets()
+    {
+        return Array.from(this._styleSheetIdentifierMap.values());
+    }
+
+    get supportsOverrideUserPreference()
+    {
+        return InspectorBackend.hasCommand("Page.overrideUserPreference") && this._defaultUserPreferences.size;
+    }
+
+    get supportsOverrideColorScheme()
+    {
+        // A backend for a platform that does not support color schemes will not dispatch an initial event (Page.defaultAppearanceDidChange or Page.defaultUserPreferencesDidChange)
+        // with the default value for the color scheme preference which gets stored on the frontend.
+
+        // COMPATIBILITY (macOS 13.0, iOS 16.0): `PrefersColorScheme` value for `Page.UserPreferenceName` did not exist yet.
+        return this._defaultUserPreferences.has(InspectorBackend.Enum.Page.UserPreferenceName?.PrefersColorScheme) || this._defaultUserPreferences.has(WI.CSSManager.ForcedAppearancePreference);
+    }
+
+    // COMPATIBILITY (macOS 13, iOS 16.0): `Page.setForcedAppearance()` was removed in favor of `Page.overrideUserPreference()`
+    setForcedAppearance(name)
+    {
+        let commandArguments = {};
+
+        switch (name) {
+        case WI.CSSManager.Appearance.Light:
+            commandArguments.appearance = InspectorBackend.Enum.Page.Appearance.Light;
+            break;
+
+        case WI.CSSManager.Appearance.Dark:
+            commandArguments.appearance = InspectorBackend.Enum.Page.Appearance.Dark;
+            break;
+
+        case null:
+            // COMPATIBILITY (iOS 14): the `appearance`` parameter of `Page.setForcedAppearance` was not optional.
+            // Since support can't be tested directly, check for the `options`` parameter of `DOMDebugger.setDOMBreakpoint` (iOS 14.0+).
+            // FIXME: Use explicit version checking once https://webkit.org/b/148680 is fixed.
+            if (!InspectorBackend.hasCommand("DOMDebugger.setDOMBreakpoint", "options"))
+                commandArguments.appearance = "";
+            break;
+
+        default:
+            console.assert(false, "Unknown appearance", name);
+            return;
+        }
+
+        let target = WI.assumingMainTarget();
+        return target.PageAgent.setForcedAppearance.invoke(commandArguments);
+    }
+
+    set layoutContextTypeChangedMode(layoutContextTypeChangedMode)
+    {
+        for (let target of WI.targets) {
+            // COMPATIBILITY (iOS 14.5): CSS.setLayoutContextTypeChangedMode did not exist.
+            if (target.hasCommand("CSS.setLayoutContextTypeChangedMode"))
+                target.CSSAgent.setLayoutContextTypeChangedMode(layoutContextTypeChangedMode);
+        }
+    }
+
+    canForcePseudoClass(pseudoClass)
+    {
+        if (!InspectorBackend.hasCommand("CSS.forcePseudoState"))
+            return false;
+
+        if (!pseudoClass)
+            return true;
+
+        switch (pseudoClass) {
+        case WI.CSSManager.ForceablePseudoClass.Active:
+        case WI.CSSManager.ForceablePseudoClass.Focus:
+        case WI.CSSManager.ForceablePseudoClass.Hover:
+        case WI.CSSManager.ForceablePseudoClass.Visited:
+            return true;
+
+        case WI.CSSManager.ForceablePseudoClass.FocusVisible:
+        case WI.CSSManager.ForceablePseudoClass.FocusWithin:
+        case WI.CSSManager.ForceablePseudoClass.Target:
+            // COMPATIBILITY (macOS 12.3, iOS 15.4): CSS.ForceablePseudoClass did not exist yet.
+            return !!InspectorBackend.Enum.CSS.ForceablePseudoClass;
+        }
+
+        console.assert(false, "Unknown pseudo class", pseudoClass);
+        return false;
+    }
+
+    overrideUserPreference(preference, value)
+    {
+        let promises = [];
+        for (let target of WI.targets) {
+            // COMPATIBILITY (macOS 13.0, iOS 16.0): `Page.overrideUserPreference()` did not exist yet.
+            if (target.hasCommand("Page.overrideUserPreference") && InspectorBackend.Enum.Page.UserPreferenceName[preference])
+                promises.push(target.PageAgent.overrideUserPreference(preference, value));
+
+            // COMPATIBILITY (macOS 13, iOS 16.0): `Page.setForcedAppearance()` was removed in favor of `Page.overrideUserPreference()`
+            if (preference === WI.CSSManager.ForcedAppearancePreference && target.hasCommand("Page.setForcedAppearance"))
+                promises.push(this.setForcedAppearance(value || null));
+        }
+
+        if (value)
+            this._overridenUserPreferences.set(preference, value);
+        else
+            this._overridenUserPreferences.delete(preference);
+
+        Promise.allSettled(promises).then(() => {
+            this.mediaQueryResultChanged();
+            this.dispatchEventToListeners(WI.CSSManager.Event.OverridenUserPreferencesDidChange);
+        })
+    }
+
+    propertyNameHasOtherVendorPrefix(name)
+    {
+        if (!name || name.length < 4 || name.charAt(0) !== "-")
+            return false;
+
+        var match = name.match(/^(?:-moz-|-ms-|-o-|-epub-)/);
+        if (!match)
+            return false;
+
+        return true;
+    }
+
+    propertyValueHasOtherVendorKeyword(value)
+    {
+        var match = value.match(/(?:-moz-|-ms-|-o-|-epub-)[-\w]+/);
+        if (!match)
+            return false;
+
+        return true;
+    }
+
+    canonicalNameForPropertyName(name)
+    {
+        if (!name || name.length < 8 || name.charAt(0) !== "-")
+            return name;
+
+        // Keep in sync with prefix list from Source/WebInspectorUI/Scripts/update-inspector-css-documentation
+        var match = name.match(/^(?:-webkit-|-khtml-|-apple-)(.+)/);
+        if (!match)
+            return name;
+
+        return match[1];
+    }
+
+    styleSheetForIdentifier(id)
+    {
+        let styleSheet = this._styleSheetIdentifierMap.get(id);
+        if (styleSheet)
+            return styleSheet;
+
+        styleSheet = new WI.CSSStyleSheet(id);
+        this._styleSheetIdentifierMap.set(id, styleSheet);
+        return styleSheet;
+    }
+
+    stylesForNode(node)
+    {
+        if (node.id in this._nodeStylesMap)
+            return this._nodeStylesMap[node.id];
+
+        var styles = new WI.DOMNodeStyles(node);
+        this._nodeStylesMap[node.id] = styles;
+        return styles;
+    }
+
+    inspectorStyleSheetsForFrame(frame)
+    {
+        return this.styleSheets.filter((styleSheet) => styleSheet.isInspectorStyleSheet() && styleSheet.parentFrame === frame);
+    }
+
+    preferredInspectorStyleSheetForFrame(frame, callback)
+    {
+        var inspectorStyleSheets = this.inspectorStyleSheetsForFrame(frame);
+        for (let styleSheet of inspectorStyleSheets) {
+            if (styleSheet[WI.CSSManager.PreferredInspectorStyleSheetSymbol]) {
+                callback(styleSheet);
+                return;
+            }
+        }
+
+        let target = WI.assumingMainTarget();
+        target.CSSAgent.createStyleSheet(frame.id, function(error, styleSheetId) {
+            if (error || !styleSheetId) {
+                WI.reportInternalError(error || styleSheetId);
+                return;
+            }
+
+            const url = null;
+            let styleSheet = WI.cssManager.styleSheetForIdentifier(styleSheetId);
+            styleSheet.updateInfo(url, frame, styleSheet.origin, styleSheet.isInlineStyleTag(), styleSheet.startLineNumber, styleSheet.startColumnNumber);
+            styleSheet[WI.CSSManager.PreferredInspectorStyleSheetSymbol] = true;
+            callback(styleSheet);
+        });
+    }
+
+    mediaTypeChanged()
+    {
+        // Act the same as if media queries changed.
+        this.mediaQueryResultChanged();
+    }
+
+    get modifiedStyles()
+    {
+        return Array.from(this._modifiedStyles.values());
+    }
+
+    addModifiedStyle(style)
+    {
+        this._modifiedStyles.set(style.stringId, style);
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.ModifiedStylesChanged);
+    }
+
+    getModifiedStyle(style)
+    {
+        return this._modifiedStyles.get(style.stringId);
+    }
+
+    removeModifiedStyle(style)
+    {
+        this._modifiedStyles.delete(style.stringId);
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.ModifiedStylesChanged);
+    }
+
+    // PageObserver
+
+    // COMPATIBILITY (macOS 13, iOS 16.0): `Page.defaultAppearanceDidChange` was removed in favor of `Page.defaultUserPreferencesDidChange`
+    defaultAppearanceDidChange(protocolName)
+    {
+        let appearance = null;
+
+        switch (protocolName) {
+        case InspectorBackend.Enum.Page.Appearance.Light:
+            appearance = WI.CSSManager.Appearance.Light;
+            break;
+
+        case InspectorBackend.Enum.Page.Appearance.Dark:
+            appearance = WI.CSSManager.Appearance.Dark;
+            break;
+
+        default:
+            console.error("Unknown default appearance name:", protocolName);
+            break;
+        }
+
+        this.mediaQueryResultChanged();
+
+        this._defaultUserPreferences.set(WI.CSSManager.ForcedAppearancePreference, appearance);
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.DefaultUserPreferencesDidChange);
+    }
+
+    defaultUserPreferencesDidChange(userPreferences)
+    {
+        this._defaultUserPreferences.clear();
+
+        for (let userPreference of userPreferences)
+            this._defaultUserPreferences.set(userPreference.name, userPreference.value)
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.DefaultUserPreferencesDidChange);
+    }
+
+    // CSSObserver
+
+    mediaQueryResultChanged()
+    {
+        for (var key in this._nodeStylesMap)
+            this._nodeStylesMap[key].mediaQueryResultDidChange();
+    }
+
+    styleSheetChanged(styleSheetIdentifier)
+    {
+        var styleSheet = this.styleSheetForIdentifier(styleSheetIdentifier);
+        console.assert(styleSheet);
+
+        // Do not observe inline styles
+        if (styleSheet.isInlineStyleAttributeStyleSheet())
+            return;
+
+        if (!styleSheet.noteContentDidChange())
+            return;
+
+        this._updateResourceContent(styleSheet);
+    }
+
+    styleSheetAdded(styleSheetInfo)
+    {
+        console.assert(!this._styleSheetIdentifierMap.has(styleSheetInfo.styleSheetId), "Attempted to add a CSSStyleSheet but identifier was already in use");
+        let styleSheet = this.styleSheetForIdentifier(styleSheetInfo.styleSheetId);
+        let parentFrame = WI.networkManager.frameForIdentifier(styleSheetInfo.frameId);
+        let origin = WI.CSSManager.protocolStyleSheetOriginToEnum(styleSheetInfo.origin);
+        styleSheet.updateInfo(styleSheetInfo.sourceURL, parentFrame, origin, styleSheetInfo.isInline, styleSheetInfo.startLine, styleSheetInfo.startColumn);
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.StyleSheetAdded, {styleSheet});
+    }
+
+    styleSheetRemoved(styleSheetIdentifier)
+    {
+        let styleSheet = this._styleSheetIdentifierMap.get(styleSheetIdentifier);
+        console.assert(styleSheet, "Attempted to remove a CSSStyleSheet that was not tracked");
+        if (!styleSheet)
+            return;
+
+        this._styleSheetIdentifierMap.delete(styleSheetIdentifier);
+
+        this.dispatchEventToListeners(WI.CSSManager.Event.StyleSheetRemoved, {styleSheet});
+    }
+
+    // Private
+
+    _nodePseudoClassesDidChange(event)
+    {
+        var node = event.target;
+
+        for (var key in this._nodeStylesMap) {
+            var nodeStyles = this._nodeStylesMap[key];
+            if (nodeStyles.node !== node && !nodeStyles.node.isDescendant(node))
+                continue;
+            nodeStyles.pseudoClassesDidChange(node);
+        }
+    }
+
+    _nodeAttributesDidChange(event)
+    {
+        var node = event.target;
+
+        for (var key in this._nodeStylesMap) {
+            var nodeStyles = this._nodeStylesMap[key];
+            if (nodeStyles.node !== node && !nodeStyles.node.isDescendant(node))
+                continue;
+            nodeStyles.attributeDidChange(node, event.data.name);
+        }
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (!event.target.isMainFrame())
+            return;
+
+        // Clear our maps when the main frame navigates.
+
+        this._styleSheetIdentifierMap.clear();
+        this._styleSheetFrameURLMap.clear();
+        this._modifiedStyles.clear();
+
+        this._nodeStylesMap = {};
+    }
+
+    _resourceAdded(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        var resource = event.data.resource;
+        console.assert(resource);
+
+        if (resource.type !== WI.Resource.Type.StyleSheet)
+            return;
+
+        this._clearStyleSheetsForResource(resource);
+    }
+
+    _resourceTypeDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Resource);
+
+        var resource = event.target;
+        if (resource.type !== WI.Resource.Type.StyleSheet)
+            return;
+
+        this._clearStyleSheetsForResource(resource);
+    }
+
+    _clearStyleSheetsForResource(resource)
+    {
+        // Clear known stylesheets for this URL and frame. This will cause the style sheets to
+        // be updated next time _fetchInfoForAllStyleSheets is called.
+        this._styleSheetIdentifierMap.delete(this._frameURLMapKey(resource.parentFrame, resource.url));
+    }
+
+    _frameURLMapKey(frame, url)
+    {
+        return frame.id + ":" + url;
+    }
+
+    _lookupStyleSheetForResource(resource, callback)
+    {
+        this._lookupStyleSheet(resource.parentFrame, resource.url, callback);
+    }
+
+    _lookupStyleSheet(frame, url, callback)
+    {
+        console.assert(frame instanceof WI.Frame);
+
+        let key = this._frameURLMapKey(frame, url);
+
+        function styleSheetsFetched()
+        {
+            callback(this._styleSheetFrameURLMap.get(key) || null);
+        }
+
+        let styleSheet = this._styleSheetFrameURLMap.get(key) || null;
+        if (styleSheet)
+            callback(styleSheet);
+        else
+            this._fetchInfoForAllStyleSheets(styleSheetsFetched.bind(this));
+    }
+
+    _fetchInfoForAllStyleSheets(callback)
+    {
+        console.assert(typeof callback === "function");
+
+        function processStyleSheets(error, styleSheets)
+        {
+            this._styleSheetFrameURLMap.clear();
+
+            if (error) {
+                callback();
+                return;
+            }
+
+            for (let styleSheetInfo of styleSheets) {
+                let parentFrame = WI.networkManager.frameForIdentifier(styleSheetInfo.frameId);
+                let origin = WI.CSSManager.protocolStyleSheetOriginToEnum(styleSheetInfo.origin);
+
+                let styleSheet = this.styleSheetForIdentifier(styleSheetInfo.styleSheetId);
+                styleSheet.updateInfo(styleSheetInfo.sourceURL, parentFrame, origin, styleSheetInfo.isInline, styleSheetInfo.startLine, styleSheetInfo.startColumn);
+
+                let key = this._frameURLMapKey(parentFrame, styleSheetInfo.sourceURL);
+                this._styleSheetFrameURLMap.set(key, styleSheet);
+            }
+
+            callback();
+        }
+
+        let target = WI.assumingMainTarget();
+        target.CSSAgent.getAllStyleSheets(processStyleSheets.bind(this));
+    }
+
+    _resourceContentDidChange(event)
+    {
+        var resource = event.target;
+        if (resource === this._ignoreResourceContentDidChangeEventForResource)
+            return;
+
+        // Ignore changes to resource overrides, those are not live on the page.
+        if (resource.localResourceOverride)
+            return;
+
+        // Ignore if it isn't a CSS style sheet.
+        if (resource.type !== WI.Resource.Type.StyleSheet || resource.syntheticMIMEType !== "text/css")
+            return;
+
+        function applyStyleSheetChanges()
+        {
+            function styleSheetFound(styleSheet)
+            {
+                resource.__pendingChangeTimeout.cancel();
+
+                console.assert(styleSheet);
+                if (!styleSheet)
+                    return;
+
+                // To prevent updating a TextEditor's content while the user is typing in it we want to
+                // ignore the next _updateResourceContent call.
+                resource.__ignoreNextUpdateResourceContent = true;
+
+                let revision = styleSheet.editableRevision;
+                revision.updateRevisionContent(resource.content);
+            }
+
+            this._lookupStyleSheetForResource(resource, styleSheetFound.bind(this));
+        }
+
+        if (!resource.__pendingChangeTimeout)
+            resource.__pendingChangeTimeout = new Throttler(applyStyleSheetChanges.bind(this), 100);
+        resource.__pendingChangeTimeout.fire();
+    }
+
+    _updateResourceContent(styleSheet)
+    {
+        console.assert(styleSheet);
+
+        function fetchedStyleSheetContent(parameters)
+        {
+            styleSheet.__pendingChangeTimeout.cancel();
+
+            let representedObject = parameters.sourceCode;
+
+            console.assert(representedObject.url);
+            if (!representedObject.url)
+                return;
+
+            if (!styleSheet.isInspectorStyleSheet()) {
+                // Only try to update stylesheet resources. Other resources, like documents, can contain
+                // multiple stylesheets and we don't have the source ranges to update those.
+                representedObject = representedObject.parentFrame.resourcesForURL(representedObject.url).find((resource) => resource.type === WI.Resource.Type.StyleSheet);
+                if (!representedObject)
+                    return;
+            }
+
+            if (representedObject.__ignoreNextUpdateResourceContent) {
+                representedObject.__ignoreNextUpdateResourceContent = false;
+                return;
+            }
+
+            this._ignoreResourceContentDidChangeEventForResource = representedObject;
+
+            let revision = representedObject.editableRevision;
+            if (styleSheet.isInspectorStyleSheet()) {
+                revision.updateRevisionContent(representedObject.content);
+                styleSheet.dispatchEventToListeners(WI.SourceCode.Event.ContentDidChange);
+            } else
+                revision.updateRevisionContent(parameters.content);
+
+            this._ignoreResourceContentDidChangeEventForResource = null;
+        }
+
+        function styleSheetReady()
+        {
+            styleSheet.requestContent().then(fetchedStyleSheetContent.bind(this));
+        }
+
+        function applyStyleSheetChanges()
+        {
+            if (styleSheet.url)
+                styleSheetReady.call(this);
+            else
+                this._fetchInfoForAllStyleSheets(styleSheetReady.bind(this));
+        }
+
+        if (!styleSheet.__pendingChangeTimeout)
+            styleSheet.__pendingChangeTimeout = new Throttler(applyStyleSheetChanges.bind(this), 100);
+        styleSheet.__pendingChangeTimeout.fire();
+    }
+};
+
+WI.CSSManager.Event = {
+    StyleSheetAdded: "css-manager-style-sheet-added",
+    StyleSheetRemoved: "css-manager-style-sheet-removed",
+    ModifiedStylesChanged: "css-manager-modified-styles-changed",
+    DefaultUserPreferencesDidChange: "css-manager-default-user-preferences-did-change",
+    OverridenUserPreferencesDidChange: "css-manager-overriden-user-preferences-did-change",
+};
+
+WI.CSSManager.UserPreferenceDefaultValue = "System";
+
+// COMPATIBILITY (macOS 13, iOS 16.0): `Page.setForcedAppearance()` was removed in favor of `Page.overrideUserPreference()`
+WI.CSSManager.ForcedAppearancePreference = "ForcedAppearancePreference";
+WI.CSSManager.Appearance = {
+    Light: "Light",
+    Dark: "Dark",
+};
+
+WI.CSSManager.PseudoSelectorNames = {
+    After: "after",
+    Before: "before",
+    Backdrop: "backdrop",
+    FirstLetter: "first-letter",
+    FirstLine: "first-line",
+    Highlight: "highlight",
+    Marker: "marker",
+    Resizer: "resizer",
+    Scrollbar: "scrollbar",
+    ScrollbarButton: "scrollbar-button",
+    ScrollbarCorner: "scrollbar-corner",
+    ScrollbarThumb: "scrollbar-thumb",
+    ScrollbarTrack: "scrollbar-track",
+    ScrollbarTrackPiece: "scrollbar-track-piece",
+    Selection: "selection",
+};
+
+WI.CSSManager.LayoutContextTypeChangedMode = {
+    Observed: "observed",
+    All: "all",
+};
+
+WI.CSSManager.PseudoElementNames = ["before", "after"];
+
+WI.CSSManager.ForceablePseudoClass = {
+    Active: "active",
+    Focus: "focus",
+    FocusVisible: "focus-visible",
+    FocusWithin: "focus-within",
+    Hover: "hover",
+    Target: "target",
+    Visited: "visited",
+};
+
+WI.CSSManager.PreferredInspectorStyleSheetSymbol = Symbol("css-manager-preferred-inspector-style-sheet");

inspector/Controllers/CSSQueryController.js

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CSSQueryController = class CSSQueryController extends WI.QueryController
+{
+    constructor(values)
+    {
+        console.assert(Array.isArray(values), values);
+
+        super();
+
+        this._values = values || [];
+        this._cachedSpecialCharacterIndicesForValueMap = new Map;
+    }
+
+    // Public
+
+    addValues(values)
+    {
+        console.assert(Array.isArray(values), values);
+        if (!values.length)
+            return;
+
+        this._values.pushAll(values);
+    }
+
+    reset()
+    {
+        this._values = [];
+        this._cachedSpecialCharacterIndicesForValueMap.clear();
+    }
+
+    executeQuery(query)
+    {
+        if (!query || !this._values.length)
+            return [];
+
+        query = query.toLowerCase();
+
+        let results = [];
+
+        for (let value of this._values) {
+            if (!this._cachedSpecialCharacterIndicesForValueMap.has(value))
+                this._cachedSpecialCharacterIndicesForValueMap.set(value, this._findSpecialCharacterIndicesInPropertyName(value));
+
+            let matches = this.findQueryMatches(query, value.toLowerCase(), this._cachedSpecialCharacterIndicesForValueMap.get(value));
+            if (matches.length)
+                results.push(new WI.QueryResult(value, matches));
+        }
+
+        return results.sort((a, b) => {
+            if (a.rank === b.rank)
+                return WI.CSSProperty.sortPreferringNonPrefixed(a.value, b.value);
+            return b.rank - a.rank;
+        });
+    }
+
+    // Private
+
+    _findSpecialCharacterIndicesInPropertyName(propertyName)
+    {
+        return this.findSpecialCharacterIndices(propertyName, "-_");
+    }
+};

inspector/Controllers/CallFrameTreeController.js

@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CallFrameTreeController = class CallFrameTreeController extends WI.Object
+{
+    constructor(treeOutline)
+    {
+        console.assert(treeOutline instanceof WI.TreeOutline);
+
+        super();
+
+        this._treeOutline = treeOutline;
+
+        if (this._treeOutline.selectable)
+            this._treeOutline.addEventListener(WI.TreeOutline.Event.SelectionDidChange, this._treeSelectionDidChange, this);
+        else
+            this._treeOutline.addEventListener(WI.TreeOutline.Event.ElementClicked, this._treeElementClicked, this);
+    }
+
+    // Public
+
+    get treeOutline() { return this._treeOutline; }
+
+    get callFrames()
+    {
+        return this._callFrames;
+    }
+
+    set callFrames(callFrames)
+    {
+        callFrames = callFrames || [];
+        if (this._callFrames === callFrames)
+            return;
+
+        this._callFrames = callFrames;
+
+        this._treeOutline.removeChildren();
+
+        for (let callFrame of this._callFrames)
+            this._treeOutline.appendChild(new WI.CallFrameTreeElement(callFrame));
+    }
+
+    disconnect()
+    {
+        this._treeOutline.removeEventListener(null, null, this);
+    }
+
+    // Private
+
+    _treeElementClicked(event)
+    {
+        this._showSourceCodeLocation(event.data.treeElement);
+    }
+
+    _treeSelectionDidChange(event)
+    {
+        this._showSourceCodeLocation(this._treeOutline.selectedTreeElement);
+    }
+
+    _showSourceCodeLocation(treeElement)
+    {
+        let callFrame = treeElement.callFrame;
+        if (!callFrame.sourceCodeLocation)
+            return;
+
+        WI.showSourceCodeLocation(callFrame.sourceCodeLocation, {
+            ignoreNetworkTab: true,
+            ignoreSearchTab: true,
+        });
+    }
+};

inspector/Controllers/CanvasManager.js

@@ -0,0 +1,313 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: CanvasManager lacks advanced multi-target support. (Canvases per-target)
+
+WI.CanvasManager = class CanvasManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+        this._canvasCollection = new WI.CanvasCollection;
+        this._canvasIdentifierMap = new Map;
+        this._shaderProgramIdentifierMap = new Map;
+        this._savedRecordings = new Set;
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+    }
+
+    // Agent
+
+    get domains() { return ["Canvas"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "Canvas");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("Canvas")) {
+            target.CanvasAgent.enable();
+
+            // COMPATIBILITY (iOS 12): Canvas.setRecordingAutoCaptureFrameCount did not exist yet.
+            if (target.hasCommand("Canvas.setRecordingAutoCaptureFrameCount") && WI.settings.canvasRecordingAutoCaptureEnabled.value && WI.settings.canvasRecordingAutoCaptureFrameCount.value)
+                target.CanvasAgent.setRecordingAutoCaptureFrameCount(WI.settings.canvasRecordingAutoCaptureFrameCount.value);
+        }
+    }
+
+    // Static
+
+    static supportsRecordingAutoCapture()
+    {
+        return InspectorBackend.hasCommand("Canvas.setRecordingAutoCaptureFrameCount");
+    }
+
+    // Public
+
+    get canvasCollection() { return this._canvasCollection; }
+    get savedRecordings() { return this._savedRecordings; }
+
+    get shaderPrograms()
+    {
+        return Array.from(this._shaderProgramIdentifierMap.values());
+    }
+
+    async processJSON({filename, json, error})
+    {
+        if (error) {
+            WI.Recording.synthesizeError(error);
+            return;
+        }
+
+        if (typeof json !== "object" || json === null) {
+            WI.Recording.synthesizeError(WI.UIString("invalid JSON"));
+            return;
+        }
+
+        let recording = WI.Recording.fromPayload(json);
+        if (!recording)
+            return;
+
+        let extensionStart = filename.lastIndexOf(".");
+        if (extensionStart !== -1)
+            filename = filename.substring(0, extensionStart);
+        recording.createDisplayName(filename);
+
+        this._savedRecordings.add(recording);
+
+        this.dispatchEventToListeners(WI.CanvasManager.Event.RecordingSaved, {recording, imported: true, initiatedByUser: true});
+    }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("Canvas"))
+                target.CanvasAgent.disable();
+        }
+
+        this._canvasCollection.clear();
+        this._canvasIdentifierMap.clear();
+        this._shaderProgramIdentifierMap.clear();
+        this._savedRecordings.clear();
+
+        this._enabled = false;
+    }
+
+    setRecordingAutoCaptureFrameCount(enabled, count)
+    {
+        console.assert(!isNaN(count) && count >= 0);
+
+        for (let target of WI.targets) {
+            // COMPATIBILITY (iOS 12): Canvas.setRecordingAutoCaptureFrameCount did not exist yet.
+            if (target.hasCommand("Canvas.setRecordingAutoCaptureFrameCount"))
+                target.CanvasAgent.setRecordingAutoCaptureFrameCount(enabled ? count : 0);
+        }
+
+        WI.settings.canvasRecordingAutoCaptureEnabled.value = enabled && count;
+        WI.settings.canvasRecordingAutoCaptureFrameCount.value = count;
+    }
+
+    // CanvasObserver
+
+    canvasAdded(canvasPayload)
+    {
+        console.assert(!this._canvasIdentifierMap.has(canvasPayload.canvasId), `Canvas already exists with id ${canvasPayload.canvasId}.`);
+
+        let canvas = WI.Canvas.fromPayload(canvasPayload);
+        this._canvasCollection.add(canvas);
+        this._canvasIdentifierMap.set(canvas.identifier, canvas);
+    }
+
+    canvasRemoved(canvasIdentifier)
+    {
+        let canvas = this._canvasIdentifierMap.take(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        this._saveRecordings(canvas);
+
+        this._canvasCollection.remove(canvas);
+
+        for (let program of canvas.shaderProgramCollection)
+            this._shaderProgramIdentifierMap.delete(program.identifier);
+
+        canvas.shaderProgramCollection.clear();
+    }
+
+    canvasMemoryChanged(canvasIdentifier, memoryCost)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.memoryCost = memoryCost;
+    }
+
+    clientNodesChanged(canvasIdentifier)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.clientNodesChanged();
+    }
+
+    recordingStarted(canvasIdentifier, initiator)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.recordingStarted(initiator);
+    }
+
+    recordingProgress(canvasIdentifier, framesPayload, bufferUsed)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.recordingProgress(framesPayload, bufferUsed);
+    }
+
+    recordingFinished(canvasIdentifier, recordingPayload)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.recordingFinished(recordingPayload);
+    }
+
+    extensionEnabled(canvasIdentifier, extension)
+    {
+        let canvas = this._canvasIdentifierMap.get(canvasIdentifier);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        canvas.enableExtension(extension);
+    }
+
+    programCreated(shaderProgramPayload)
+    {
+        let canvas = this._canvasIdentifierMap.get(shaderProgramPayload.canvasId);
+        console.assert(canvas);
+        if (!canvas)
+            return;
+
+        let programId = shaderProgramPayload.programId;
+        console.assert(!this._shaderProgramIdentifierMap.has(programId), `ShaderProgram already exists with id ${programId}.`);
+
+        // COMPATIBILITY (iOS 13.0): `Canvas.ShaderProgram.programType` did not exist yet.
+        let programType = shaderProgramPayload.programType;
+        if (!programType)
+            programType = WI.ShaderProgram.ProgramType.Render;
+
+        let options = {};
+
+        // COMPATIBILITY (iOS 13.0): `Canvas.ShaderProgram.sharesVertexFragmentShader` did not exist yet.
+        if (shaderProgramPayload.sharesVertexFragmentShader)
+            options.sharesVertexFragmentShader = true;
+
+        let program = new WI.ShaderProgram(programId, programType, canvas, options);
+        this._shaderProgramIdentifierMap.set(program.identifier, program);
+
+        canvas.shaderProgramCollection.add(program);
+    }
+
+    programDeleted(programIdentifier)
+    {
+        let program = this._shaderProgramIdentifierMap.take(programIdentifier);
+        console.assert(program);
+        if (!program)
+            return;
+
+        program.canvas.shaderProgramCollection.remove(program);
+    }
+
+    // Private
+
+    _saveRecordings(canvas)
+    {
+        for (let recording of canvas.recordingCollection) {
+            recording.source = null;
+            recording.createDisplayName(recording.displayName);
+            this._savedRecordings.add(recording);
+            this.dispatchEventToListeners(WI.CanvasManager.Event.RecordingSaved, {recording});
+        }
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+        if (!event.target.isMainFrame())
+            return;
+
+        WI.Canvas.resetUniqueDisplayNameNumbers();
+
+        for (let canvas of this._canvasIdentifierMap.values())
+            this._saveRecordings(canvas);
+
+        this._canvasCollection.clear();
+        this._canvasIdentifierMap.clear();
+        this._shaderProgramIdentifierMap.clear();
+    }
+};
+
+WI.CanvasManager.Event = {
+    RecordingSaved: "canvas-manager-recording-saved",
+};

inspector/Controllers/CodeMirrorBezierEditingController.js

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorBezierEditingController = class CodeMirrorBezierEditingController extends WI.CodeMirrorEditingController
+{
+    // Public
+
+    get initialValue()
+    {
+        return WI.CubicBezier.fromString(this.text);
+    }
+
+    get cssClassName()
+    {
+        return "cubic-bezier";
+    }
+
+    popoverWillPresent(popover)
+    {
+        this._bezierEditor = new WI.BezierEditor;
+        this._bezierEditor.addEventListener(WI.BezierEditor.Event.BezierChanged, this._bezierEditorBezierChanged, this);
+        popover.content = this._bezierEditor.element;
+    }
+
+    popoverDidPresent(popover)
+    {
+        this._bezierEditor.bezier = this.value;
+    }
+
+    popoverDidDismiss(popover)
+    {
+        this._bezierEditor.removeListeners();
+    }
+
+    // Private
+
+    _bezierEditorBezierChanged(event)
+    {
+        this.value = event.data.bezier;
+    }
+};

inspector/Controllers/CodeMirrorColorEditingController.js

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorColorEditingController = class CodeMirrorColorEditingController extends WI.CodeMirrorEditingController
+{
+    // Public
+
+    get initialValue()
+    {
+        return WI.Color.fromString(this.text);
+    }
+
+    get cssClassName()
+    {
+        return "color";
+    }
+
+    popoverWillPresent(popover)
+    {
+        this._colorPicker = new WI.ColorPicker;
+        this._colorPicker.addEventListener(WI.ColorPicker.Event.ColorChanged, this._colorPickerColorChanged, this);
+        popover.content = this._colorPicker.element;
+    }
+
+    popoverDidPresent(popover)
+    {
+        this._colorPicker.color = this._value;
+    }
+
+    // Private
+
+    _colorPickerColorChanged(event)
+    {
+        this.value = event.target.color;
+    }
+};

inspector/Controllers/CodeMirrorCompletionController.css

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.CodeMirror .CodeMirror-lines .completion-hint {
+    text-decoration: none !important;
+    opacity: 0.4;
+}

inspector/Controllers/CodeMirrorCompletionController.js

@@ -0,0 +1,926 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorCompletionController = class CodeMirrorCompletionController extends WI.Object
+{
+    constructor(mode, codeMirror, delegate, stopCharactersRegex)
+    {
+        console.assert(Object.values(WI.CodeMirrorCompletionController.Mode).includes(mode), mode);
+        console.assert(codeMirror instanceof CodeMirror, codeMirror);
+
+        super();
+
+        this._mode = mode;
+        this._codeMirror = codeMirror;
+        this._stopCharactersRegex = stopCharactersRegex || null;
+        this._delegate = delegate || null;
+
+        this._startOffset = NaN;
+        this._endOffset = NaN;
+        this._lineNumber = NaN;
+        this._prefix = "";
+        this._noEndingSemicolon = false;
+        this._completions = [];
+        this._extendedCompletionProviders = {};
+
+        this._suggestionsView = new WI.CompletionSuggestionsView(this);
+
+        this._keyMap = {
+            "Up": this._handleUpKey.bind(this),
+            "Down": this._handleDownKey.bind(this),
+            "Right": this._handleRightOrEnterKey.bind(this),
+            "Esc": this._handleEscapeKey.bind(this),
+            "Enter": this._handleRightOrEnterKey.bind(this),
+            "Tab": this._handleTabKey.bind(this),
+            "Cmd-A": this._handleHideKey.bind(this),
+            "Cmd-Z": this._handleHideKey.bind(this),
+            "Shift-Cmd-Z": this._handleHideKey.bind(this),
+            "Cmd-Y": this._handleHideKey.bind(this)
+        };
+
+        this._handleChangeListener = this._handleChange.bind(this);
+        this._handleCursorActivityListener = this._handleCursorActivity.bind(this);
+        this._handleHideActionListener = this._handleHideAction.bind(this);
+
+        this._codeMirror.addKeyMap(this._keyMap);
+
+        this._codeMirror.on("change", this._handleChangeListener);
+        this._codeMirror.on("cursorActivity", this._handleCursorActivityListener);
+        this._codeMirror.on("blur", this._handleHideActionListener);
+        this._codeMirror.on("scroll", this._handleHideActionListener);
+
+        this._updatePromise = null;
+    }
+
+    // Public
+
+    get mode() { return this._mode; }
+
+    addExtendedCompletionProvider(modeName, provider)
+    {
+        this._extendedCompletionProviders[modeName] = provider;
+    }
+
+    updateCompletions(completions, implicitSuffix)
+    {
+        if (isNaN(this._startOffset) || isNaN(this._endOffset) || isNaN(this._lineNumber))
+            return;
+
+        if (!completions || !completions.length) {
+            this.hideCompletions();
+            return;
+        }
+
+        this._completions = completions;
+
+        if (typeof implicitSuffix === "string")
+            this._implicitSuffix = implicitSuffix;
+
+        var from = {line: this._lineNumber, ch: this._startOffset};
+        var to = {line: this._lineNumber, ch: this._endOffset};
+
+        var firstCharCoords = this._codeMirror.cursorCoords(from);
+        var lastCharCoords = this._codeMirror.cursorCoords(to);
+        var bounds = new WI.Rect(firstCharCoords.left, firstCharCoords.top, lastCharCoords.right - firstCharCoords.left, firstCharCoords.bottom - firstCharCoords.top);
+
+        // Try to restore the previous selected index, otherwise just select the first.
+        var index = this._currentCompletion ? completions.indexOf(this._currentCompletion) : 0;
+        if (index === -1)
+            index = 0;
+
+        if (this._forced || completions.length > 1 || completions[index] !== this._prefix) {
+            // Update and show the suggestion list.
+            this._suggestionsView.update(completions, index);
+            this._suggestionsView.show(bounds);
+        } else if (this._implicitSuffix) {
+            // The prefix and the completion exactly match, but there is an implicit suffix.
+            // Just hide the suggestion list and keep the completion hint for the implicit suffix.
+            this._suggestionsView.hide();
+        } else {
+            // The prefix and the completion exactly match, hide the completions. Return early so
+            // the completion hint isn't updated.
+            this.hideCompletions();
+            return;
+        }
+
+        this._applyCompletionHint(completions[index]);
+
+        this._resolveUpdatePromise(WI.CodeMirrorCompletionController.UpdatePromise.CompletionsFound);
+    }
+
+    isCompletionChange(change)
+    {
+        return this._ignoreChange || change.origin === WI.CodeMirrorCompletionController.CompletionOrigin || change.origin === WI.CodeMirrorCompletionController.DeleteCompletionOrigin;
+    }
+
+    isShowingCompletions()
+    {
+        return this._suggestionsView.visible || (this._completionHintMarker && this._completionHintMarker.find());
+    }
+
+    isHandlingClickEvent()
+    {
+        return this._suggestionsView.isHandlingClickEvent();
+    }
+
+    commitCurrentCompletion()
+    {
+        this._removeCompletionHint(true, true);
+
+        let replacementText = this._currentReplacementText;
+        if (!replacementText)
+            return;
+
+        let from = {line: this._lineNumber, ch: this._startOffset};
+        let cursor = {line: this._lineNumber, ch: this._endOffset};
+        let to = {line: this._lineNumber, ch: this._startOffset + replacementText.length};
+
+        let lastChar = this._currentCompletion.charAt(this._currentCompletion.length - 1);
+        let isClosing = ")]}".indexOf(lastChar);
+        if (isClosing !== -1)
+            to.ch -= 1 + this._implicitSuffix.length;
+
+        this._codeMirror.replaceRange(replacementText, from, cursor, WI.CodeMirrorCompletionController.CompletionOrigin);
+
+        // Don't call _removeLastChangeFromHistory here to allow the committed completion to be undone.
+
+        this._codeMirror.setCursor(to);
+
+        this.hideCompletions();
+    }
+
+    hideCompletions()
+    {
+        this._suggestionsView.hide();
+
+        this._removeCompletionHint();
+
+        this._startOffset = NaN;
+        this._endOffset = NaN;
+        this._lineNumber = NaN;
+        this._prefix = "";
+        this._completions = [];
+        this._implicitSuffix = "";
+        this._forced = false;
+
+        delete this._currentCompletion;
+        delete this._ignoreNextCursorActivity;
+
+        this._resolveUpdatePromise(WI.CodeMirrorCompletionController.UpdatePromise.NoCompletionsFound);
+    }
+
+    close()
+    {
+        this._codeMirror.removeKeyMap(this._keyMap);
+
+        this._codeMirror.off("change", this._handleChangeListener);
+        this._codeMirror.off("cursorActivity", this._handleCursorActivityListener);
+        this._codeMirror.off("blur", this._handleHideActionListener);
+        this._codeMirror.off("scroll", this._handleHideActionListener);
+    }
+
+    completeAtCurrentPositionIfNeeded(force)
+    {
+        this._resolveUpdatePromise(WI.CodeMirrorCompletionController.UpdatePromise.Canceled);
+
+        var update = this._updatePromise = new WI.WrappedPromise;
+
+        this._completeAtCurrentPosition(force);
+
+        return update.promise;
+    }
+
+    // Protected
+
+    completionSuggestionsSelectedCompletion(suggestionsView, completionText)
+    {
+        this._applyCompletionHint(completionText);
+    }
+
+    completionSuggestionsClickedCompletion(suggestionsView, completionText)
+    {
+        // The clicked suggestion causes the editor to loose focus. Restore it so the user can keep typing.
+        this._codeMirror.focus();
+
+        this._applyCompletionHint(completionText);
+        this._commitCompletionHint();
+    }
+
+    set noEndingSemicolon(noEndingSemicolon)
+    {
+        this._noEndingSemicolon = noEndingSemicolon;
+    }
+
+    // Private
+
+    _resolveUpdatePromise(message)
+    {
+        if (!this._updatePromise)
+            return;
+
+        this._updatePromise.resolve(message);
+        this._updatePromise = null;
+    }
+
+    get _currentReplacementText()
+    {
+        return (this._currentCompletion ?? "") + (this._implicitSuffix ?? "");
+    }
+
+    _hasPendingCompletion()
+    {
+        return !isNaN(this._startOffset) && !isNaN(this._endOffset) && !isNaN(this._lineNumber);
+    }
+
+    _notifyCompletionsHiddenSoon()
+    {
+        function notify()
+        {
+            if (this._completionHintMarker)
+                return;
+
+            if (this._delegate && typeof this._delegate.completionControllerCompletionsHidden === "function")
+                this._delegate.completionControllerCompletionsHidden(this);
+        }
+
+        if (this._notifyCompletionsHiddenIfNeededTimeout)
+            clearTimeout(this._notifyCompletionsHiddenIfNeededTimeout);
+        this._notifyCompletionsHiddenIfNeededTimeout = setTimeout(notify.bind(this), WI.CodeMirrorCompletionController.CompletionsHiddenDelay);
+    }
+
+    _createCompletionHintMarker(position, text)
+    {
+        var container = document.createElement("span");
+        container.classList.add(WI.CodeMirrorCompletionController.CompletionHintStyleClassName);
+        container.textContent = text;
+
+        container.addEventListener("mousedown", (event) => {
+            event.preventDefault();
+            this._commitCompletionHint();
+
+            // The clicked hint marker causes the editor to loose focus. Restore it so the user can keep typing.
+            setTimeout(() => { this._codeMirror.focus(); }, 0);
+        });
+
+        this._completionHintMarker = this._codeMirror.setUniqueBookmark(position, {widget: container, insertLeft: true});
+    }
+
+    _applyCompletionHint(completionText)
+    {
+        console.assert(completionText);
+        if (!completionText)
+            return;
+
+        function update()
+        {
+            this._currentCompletion = completionText;
+
+            this._removeCompletionHint(true, true);
+
+            var replacementText = this._currentReplacementText;
+
+            var from = {line: this._lineNumber, ch: this._startOffset};
+            var cursor = {line: this._lineNumber, ch: this._endOffset};
+            var currentText = this._codeMirror.getRange(from, cursor);
+
+            this._createCompletionHintMarker(cursor, replacementText.replace(currentText, ""));
+        }
+
+        this._ignoreChange = true;
+        this._ignoreNextCursorActivity = true;
+
+        this._codeMirror.operation(update.bind(this));
+
+        delete this._ignoreChange;
+    }
+
+    _commitCompletionHint()
+    {
+        this._ignoreChange = true;
+        this._ignoreNextCursorActivity = true;
+
+        this._codeMirror.operation(this.commitCurrentCompletion.bind(this));
+
+        delete this._ignoreChange;
+    }
+
+    _removeLastChangeFromHistory()
+    {
+        var history = this._codeMirror.getHistory();
+
+        // We don't expect a undone history. But if there is one clear it. If could lead to undefined behavior.
+        console.assert(!history.undone.length);
+        history.undone = [];
+
+        // Pop the last item from the done history.
+        console.assert(history.done.length);
+        history.done.pop();
+
+        this._codeMirror.setHistory(history);
+    }
+
+    _removeCompletionHint(nonatomic, dontRestorePrefix)
+    {
+        if (!this._completionHintMarker)
+            return;
+
+        this._notifyCompletionsHiddenSoon();
+
+        function clearMarker(marker)
+        {
+            if (!marker)
+                return;
+
+            var range = marker.find();
+            if (range)
+                marker.clear();
+
+            return null;
+        }
+
+        function update()
+        {
+            this._completionHintMarker = clearMarker(this._completionHintMarker);
+
+            if (dontRestorePrefix)
+                return;
+
+            console.assert(!isNaN(this._startOffset));
+            console.assert(!isNaN(this._endOffset));
+            console.assert(!isNaN(this._lineNumber));
+
+            var from = {line: this._lineNumber, ch: this._startOffset};
+            var to = {line: this._lineNumber, ch: this._endOffset};
+
+            this._codeMirror.replaceRange(this._prefix, from, to, WI.CodeMirrorCompletionController.DeleteCompletionOrigin);
+            this._removeLastChangeFromHistory();
+        }
+
+        if (nonatomic) {
+            update.call(this);
+            return;
+        }
+
+        this._ignoreChange = true;
+
+        this._codeMirror.operation(update.bind(this));
+
+        delete this._ignoreChange;
+    }
+
+    _scanStringForExpression(modeName, string, startOffset, direction, allowMiddleAndEmpty, includeStopCharacter, ignoreInitialUnmatchedOpenBracket, stopCharactersRegex)
+    {
+        console.assert(direction === -1 || direction === 1);
+
+        var stopCharactersRegex = stopCharactersRegex || this._stopCharactersRegex || WI.CodeMirrorCompletionController.DefaultStopCharactersRegexModeMap[modeName] || WI.CodeMirrorCompletionController.GenericStopCharactersRegex;
+
+        function isStopCharacter(character)
+        {
+            return stopCharactersRegex.test(character);
+        }
+
+        function isOpenBracketCharacter(character)
+        {
+            return WI.CodeMirrorCompletionController.OpenBracketCharactersRegex.test(character);
+        }
+
+        function isCloseBracketCharacter(character)
+        {
+            return WI.CodeMirrorCompletionController.CloseBracketCharactersRegex.test(character);
+        }
+
+        function matchingBracketCharacter(character)
+        {
+            return WI.CodeMirrorCompletionController.MatchingBrackets[character];
+        }
+
+        var endOffset = Math.min(startOffset, string.length);
+
+        var endOfLineOrWord = endOffset === string.length || isStopCharacter(string.charAt(endOffset));
+
+        if (!endOfLineOrWord && !allowMiddleAndEmpty)
+            return null;
+
+        var bracketStack = [];
+        var bracketOffsetStack = [];
+
+        var startOffset = endOffset;
+        var firstOffset = endOffset + direction;
+        for (var i = firstOffset; direction > 0 ? i < string.length : i >= 0; i += direction) {
+            var character = string.charAt(i);
+
+            // Ignore stop characters when we are inside brackets.
+            if (isStopCharacter(character) && !bracketStack.length)
+                break;
+
+            if (isCloseBracketCharacter(character)) {
+                bracketStack.push(character);
+                bracketOffsetStack.push(i);
+            } else if (isOpenBracketCharacter(character)) {
+                if ((!ignoreInitialUnmatchedOpenBracket || i !== firstOffset) && (!bracketStack.length || matchingBracketCharacter(character) !== bracketStack.lastValue))
+                    break;
+
+                bracketOffsetStack.pop();
+                bracketStack.pop();
+            }
+
+            startOffset = i + (direction > 0 ? 1 : 0);
+        }
+
+        if (bracketOffsetStack.length)
+            startOffset = bracketOffsetStack.pop() + 1;
+
+        if (includeStopCharacter && startOffset > 0 && startOffset < string.length)
+            startOffset += direction;
+
+        if (direction > 0) {
+            var tempEndOffset = endOffset;
+            endOffset = startOffset;
+            startOffset = tempEndOffset;
+        }
+
+        return {string: string.substring(startOffset, endOffset), startOffset, endOffset};
+    }
+
+    _completeAtCurrentPosition(force)
+    {
+        if (this._codeMirror.somethingSelected()) {
+            this.hideCompletions();
+            return;
+        }
+
+        this._removeCompletionHint(true, true);
+
+        var cursor = this._codeMirror.getCursor();
+        var token = this._codeMirror.getTokenAt(cursor);
+
+        // Don't try to complete inside comments or strings.
+        if (token.type && /\b(comment|string)\b/.test(token.type)) {
+            this.hideCompletions();
+            return;
+        }
+
+        var mode = this._codeMirror.getMode();
+        var innerMode = CodeMirror.innerMode(mode, token.state).mode;
+        var modeName = innerMode.alternateName || innerMode.name;
+
+        var lineNumber = cursor.line;
+        var lineString = this._codeMirror.getLine(lineNumber);
+
+        var backwardScanResult = this._scanStringForExpression(modeName, lineString, cursor.ch, -1, force);
+        if (!backwardScanResult) {
+            this.hideCompletions();
+            return;
+        }
+
+        var forwardScanResult = this._scanStringForExpression(modeName, lineString, cursor.ch, 1, true, true);
+        var suffix = forwardScanResult.string;
+
+        this._ignoreNextCursorActivity = true;
+
+        this._startOffset = backwardScanResult.startOffset;
+        this._endOffset = backwardScanResult.endOffset;
+        this._lineNumber = lineNumber;
+        this._prefix = backwardScanResult.string;
+        this._completions = [];
+        this._implicitSuffix = "";
+        this._forced = force;
+
+        var baseExpressionStopCharactersRegex = WI.CodeMirrorCompletionController.BaseExpressionStopCharactersRegexModeMap[modeName];
+        if (baseExpressionStopCharactersRegex)
+            var baseScanResult = this._scanStringForExpression(modeName, lineString, this._startOffset, -1, true, false, true, baseExpressionStopCharactersRegex);
+
+        if (!force && !backwardScanResult.string && (!baseScanResult || !baseScanResult.string)) {
+            this.hideCompletions();
+            return;
+        }
+
+        var defaultCompletions = [];
+
+        switch (modeName) {
+        case "css":
+            defaultCompletions = this._generateCSSCompletions(token, baseScanResult ? baseScanResult.string : null, suffix);
+            break;
+        case "javascript":
+            defaultCompletions = this._generateJavaScriptCompletions(token, baseScanResult ? baseScanResult.string : null, suffix);
+            break;
+        }
+
+        var extendedCompletionsProvider = this._extendedCompletionProviders[modeName];
+        if (extendedCompletionsProvider) {
+            extendedCompletionsProvider.completionControllerCompletionsNeeded(this, defaultCompletions, baseScanResult ? baseScanResult.string : null, this._prefix, suffix, force);
+            return;
+        }
+
+        if (this._delegate && typeof this._delegate.completionControllerCompletionsNeeded === "function")
+            this._delegate.completionControllerCompletionsNeeded(this, this._prefix, defaultCompletions, baseScanResult ? baseScanResult.string : null, suffix, force);
+        else
+            this.updateCompletions(defaultCompletions);
+    }
+
+    _generateCSSCompletions(mainToken, base, suffix)
+    {
+        // We support completion inside CSS block context and functions.
+        if (mainToken.state.state === "media" || mainToken.state.state === "top")
+            return [];
+
+        // Don't complete in the middle of a property name.
+        if (/^[a-z]/i.test(suffix))
+            return [];
+
+        var token = mainToken;
+        var lineNumber = this._lineNumber;
+
+        let getPreviousToken = () => {
+            // Found the beginning of the line. Go to the previous line.
+            if (!token.start) {
+                --lineNumber;
+
+                // No more lines, stop.
+                if (lineNumber < 0)
+                    return null;
+            }
+
+            return this._codeMirror.getTokenAt({line: lineNumber, ch: token.start ? token.start : Number.MAX_VALUE});
+        };
+
+        // Inside a function, determine the function name.
+        if (token.state.state === "parens") {
+            // Scan backwards looking for the function paren boundary.
+            while (token && token.state.state === "parens" && token.string !== "(")
+                token = getPreviousToken();
+
+            // The immediately preceding token should have the function name.
+            if (token)
+                token = getPreviousToken();
+
+            // No completions if no function name found.
+            if (!token)
+                return [];
+
+            let functionName = token.string;
+            if (!functionName)
+                return [];
+
+            let functionCompletions = WI.CSSKeywordCompletions.forFunction(functionName).startsWith(this._prefix);
+
+            if (this._delegate && this._delegate.completionControllerCSSFunctionValuesNeeded)
+                functionCompletions = this._delegate.completionControllerCSSFunctionValuesNeeded(this, functionName, functionCompletions);
+
+            return functionCompletions;
+        }
+
+        // Scan backwards looking for the current property.
+        while (token.state.state === "prop") {
+            let previousToken = getPreviousToken();
+            if (!previousToken)
+                break;
+            token = previousToken;
+        }
+
+        // If we have a property token and it's not the main token, then we are working on
+        // the value for that property and should complete allowed values.
+        if (mainToken !== token && token.type && /\bproperty\b/.test(token.type)) {
+            var propertyName = token.string;
+
+            // If there is a suffix and it isn't a semicolon, then we should use a space since
+            // the user is editing in the middle. Likewise if the suffix starts with an open
+            // paren we are changing a function name so don't add a suffix.
+            this._implicitSuffix = " ";
+            if (suffix === ";")
+                this._implicitSuffix = this._noEndingSemicolon ? "" : ";";
+            else if (suffix.startsWith("("))
+                this._implicitSuffix = "";
+
+            // Don't use an implicit suffix if it would be the same as the existing suffix.
+            if (this._implicitSuffix === suffix)
+                this._implicitSuffix = "";
+
+            let completions = WI.CSSKeywordCompletions.forProperty(propertyName).startsWith(this._prefix);
+
+            if (suffix.startsWith("("))
+                completions = completions.map((x) => x.replace(/\(\)$/, ""));
+
+            return completions;
+        }
+
+        this._implicitSuffix = suffix !== ":" ? ": " : "";
+
+        // Complete property names.
+        return WI.cssManager.propertyNameCompletions.startsWith(this._prefix);
+    }
+
+    _generateJavaScriptCompletions(mainToken, base, suffix)
+    {
+        // If there is a base expression then we should not attempt to match any keywords or variables.
+        // Allow only open bracket characters at the end of the base, otherwise leave completions with
+        // a base up to the delegate to figure out.
+        if (base && !/[({[]$/.test(base))
+            return [];
+
+        var matchingWords = [];
+
+        var prefix = this._prefix;
+
+        var localState = mainToken.state.localState ? mainToken.state.localState : mainToken.state;
+
+        var declaringVariable = localState.lexical.type === "vardef";
+        var insideSwitch = localState.lexical.prev ? localState.lexical.prev.info === "switch" : false;
+        var insideBlock = localState.lexical.prev ? localState.lexical.prev.type === "}" : false;
+        var insideParenthesis = localState.lexical.type === ")";
+        var insideBrackets = localState.lexical.type === "]";
+
+        // FIXME: Include module keywords if we know this is a module environment.
+        // var moduleKeywords = ["default", "export", "import"];
+
+        const allKeywords = [
+            "break", "case", "catch", "class", "const", "continue", "debugger", "default",
+            "delete", "do", "else", "extends", "false", "finally", "for", "function",
+            "if", "in", "Infinity", "instanceof", "let", "NaN", "new", "null", "of",
+            "return", "static", "super", "switch", "this", "throw", "true", "try",
+            "typeof", "undefined", "var", "void", "while", "with", "yield"
+        ];
+        const valueKeywords = ["false", "Infinity", "NaN", "null", "this", "true", "undefined", "globalThis"];
+
+        const allowedKeywordsInsideBlocks = new Set(allKeywords);
+        const allowedKeywordsWhenDeclaringVariable = new Set(valueKeywords);
+        const allowedKeywordsInsideParenthesis = new Set(valueKeywords.concat(["class", "function"]));
+        const allowedKeywordsInsideBrackets = allowedKeywordsInsideParenthesis;
+        const allowedKeywordsOnlyInsideSwitch = new Set(["case", "default"]);
+
+        function matchKeywords(keywords)
+        {
+            for (let keyword of keywords) {
+                if (!insideSwitch && allowedKeywordsOnlyInsideSwitch.has(keyword))
+                    continue;
+                if (insideBlock && !allowedKeywordsInsideBlocks.has(keyword))
+                    continue;
+                if (insideBrackets && !allowedKeywordsInsideBrackets.has(keyword))
+                    continue;
+                if (insideParenthesis && !allowedKeywordsInsideParenthesis.has(keyword))
+                    continue;
+                if (declaringVariable && !allowedKeywordsWhenDeclaringVariable.has(keyword))
+                    continue;
+                if (!keyword.startsWith(prefix))
+                    continue;
+                matchingWords.push(keyword);
+            }
+        }
+
+        function matchVariables()
+        {
+            function filterVariables(variables)
+            {
+                for (var variable = variables; variable; variable = variable.next) {
+                    // Don't match the variable if this token is in a variable declaration.
+                    // Otherwise the currently typed text will always match and that isn't useful.
+                    if (declaringVariable && variable.name === prefix)
+                        continue;
+
+                    if (variable.name.startsWith(prefix) && !matchingWords.includes(variable.name))
+                        matchingWords.push(variable.name);
+                }
+            }
+
+            var context = localState.context;
+            while (context) {
+                if (context.vars)
+                    filterVariables(context.vars);
+                context = context.prev;
+            }
+
+            if (localState.localVars)
+                filterVariables(localState.localVars);
+            if (localState.globalVars)
+                filterVariables(localState.globalVars);
+        }
+
+        switch (suffix.substring(0, 1)) {
+        case "":
+        case " ":
+            matchVariables();
+            matchKeywords(allKeywords);
+            break;
+
+        case ".":
+        case "[":
+            matchVariables();
+            matchKeywords(["false", "Infinity", "NaN", "this", "true"]);
+            break;
+
+        case "(":
+            matchVariables();
+            matchKeywords(["catch", "else", "for", "function", "if", "return", "switch", "throw", "while", "with", "yield"]);
+            break;
+
+        case "{":
+            matchKeywords(["do", "else", "finally", "return", "try", "yield"]);
+            break;
+
+        case ":":
+            if (insideSwitch)
+                matchKeywords(["case", "default"]);
+            break;
+
+        case ";":
+            matchVariables();
+            matchKeywords(valueKeywords);
+            matchKeywords(["break", "continue", "debugger", "return", "void"]);
+            break;
+        }
+
+        return matchingWords;
+    }
+
+    _handleUpKey(codeMirror)
+    {
+        if (!this._hasPendingCompletion())
+            return CodeMirror.Pass;
+
+        if (!this.isShowingCompletions())
+            return;
+
+        this._suggestionsView.selectPrevious();
+    }
+
+    _handleDownKey(codeMirror)
+    {
+        if (!this._hasPendingCompletion())
+            return CodeMirror.Pass;
+
+        if (!this.isShowingCompletions())
+            return;
+
+        this._suggestionsView.selectNext();
+    }
+
+    _handleRightOrEnterKey(codeMirror)
+    {
+        if (!this._hasPendingCompletion())
+            return CodeMirror.Pass;
+
+        if (!this.isShowingCompletions())
+            return;
+
+        this._commitCompletionHint();
+    }
+
+    _handleEscapeKey(codeMirror)
+    {
+        var delegateImplementsShouldAllowEscapeCompletion = this._delegate && typeof this._delegate.completionControllerShouldAllowEscapeCompletion === "function";
+        if (this._hasPendingCompletion())
+            this.hideCompletions();
+        else if (this._codeMirror.getOption("readOnly"))
+            return CodeMirror.Pass;
+        else if (!delegateImplementsShouldAllowEscapeCompletion || this._delegate.completionControllerShouldAllowEscapeCompletion(this))
+            this._completeAtCurrentPosition(true);
+        else
+            return CodeMirror.Pass;
+    }
+
+    _handleTabKey(codeMirror)
+    {
+        if (!this._hasPendingCompletion())
+            return CodeMirror.Pass;
+
+        if (!this.isShowingCompletions())
+            return;
+
+        console.assert(this._completions.length);
+        if (!this._completions.length)
+            return;
+
+        console.assert(this._currentCompletion);
+        if (!this._currentCompletion)
+            return;
+
+        // Commit the current completion if there is only one suggestion.
+        if (this._completions.length === 1) {
+            this._commitCompletionHint();
+            return;
+        }
+
+        var prefixLength = this._prefix.length;
+
+        var commonPrefix = this._completions[0];
+        for (var i = 1; i < this._completions.length; ++i) {
+            var completion = this._completions[i];
+            var lastIndex = Math.min(commonPrefix.length, completion.length);
+            for (var j = prefixLength; j < lastIndex; ++j) {
+                if (commonPrefix[j] !== completion[j]) {
+                    commonPrefix = commonPrefix.substr(0, j);
+                    break;
+                }
+            }
+        }
+
+        // Commit the current completion if there is no common prefix that is longer.
+        if (commonPrefix === this._prefix) {
+            this._commitCompletionHint();
+            return;
+        }
+
+        // Set the prefix to the common prefix so _applyCompletionHint will insert the
+        // common prefix as commited text. Adjust _endOffset to match the new prefix.
+        this._prefix = commonPrefix;
+        this._endOffset = this._startOffset + commonPrefix.length;
+
+        this._applyCompletionHint(this._currentCompletion);
+    }
+
+    _handleChange(codeMirror, change)
+    {
+        if (this.isCompletionChange(change))
+            return;
+
+        this._ignoreNextCursorActivity = true;
+
+        if (!change.origin || change.origin.charAt(0) !== "+") {
+            this.hideCompletions();
+            return;
+        }
+
+        // Only complete on delete if we are showing completions already.
+        if (change.origin === "+delete" && !this._hasPendingCompletion())
+            return;
+
+        this._completeAtCurrentPosition(false);
+    }
+
+    _handleCursorActivity(codeMirror)
+    {
+        if (this._ignoreChange)
+            return;
+
+        if (this._ignoreNextCursorActivity) {
+            delete this._ignoreNextCursorActivity;
+            return;
+        }
+
+        this.hideCompletions();
+    }
+
+    _handleHideKey(codeMirror)
+    {
+        this.hideCompletions();
+
+        return CodeMirror.Pass;
+    }
+
+    _handleHideAction(codeMirror)
+    {
+        // Clicking a suggestion causes the editor to blur. We don't want to hide completions in this case.
+        if (this.isHandlingClickEvent())
+            return;
+
+        this.hideCompletions();
+    }
+};
+
+WI.CodeMirrorCompletionController.Mode = {
+    Basic: "basic",
+    EventBreakpoint: "event-breakpoint",
+    ExceptionBreakpoint: "exception-breakpoint",
+    FullConsoleCommandLineAPI: "full-console-command-line-api",
+    PausedConsoleCommandLineAPI: "paused-console-command-line-api",
+};
+
+WI.CodeMirrorCompletionController.UpdatePromise = {
+    Canceled: "code-mirror-completion-controller-canceled",
+    CompletionsFound: "code-mirror-completion-controller-completions-found",
+    NoCompletionsFound: "code-mirror-completion-controller-no-completions-found"
+};
+
+WI.CodeMirrorCompletionController.GenericStopCharactersRegex = /[\s=:;,]/;
+WI.CodeMirrorCompletionController.DefaultStopCharactersRegexModeMap = {"css": /[\s:;,{}()]/, "javascript": /[\s=:;,!+\-*/%&|^~?<>.{}()[\]]/};
+WI.CodeMirrorCompletionController.BaseExpressionStopCharactersRegexModeMap = {"javascript": /[\s=:;,!+\-*/%&|^~?<>]/};
+WI.CodeMirrorCompletionController.OpenBracketCharactersRegex = /[({[]/;
+WI.CodeMirrorCompletionController.CloseBracketCharactersRegex = /[)}\]]/;
+WI.CodeMirrorCompletionController.MatchingBrackets = {"{": "}", "(": ")", "[": "]", "}": "{", ")": "(", "]": "["};
+WI.CodeMirrorCompletionController.CompletionHintStyleClassName = "completion-hint";
+WI.CodeMirrorCompletionController.CompletionsHiddenDelay = 250;
+WI.CodeMirrorCompletionController.CompletionTypingDelay = 250;
+WI.CodeMirrorCompletionController.CompletionOrigin = "+completion";
+WI.CodeMirrorCompletionController.DeleteCompletionOrigin = "+delete-completion";

inspector/Controllers/CodeMirrorDragToAdjustNumberController.css

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.CodeMirror.drag-to-adjust .CodeMirror-lines {
+    cursor: col-resize;
+}

inspector/Controllers/CodeMirrorDragToAdjustNumberController.js

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorDragToAdjustNumberController = class CodeMirrorDragToAdjustNumberController extends WI.Object
+{
+    constructor(codeMirror)
+    {
+        super();
+
+        this._codeMirror = codeMirror;
+
+        this._dragToAdjustController = new WI.DragToAdjustController(this);
+    }
+
+    // Public
+
+    get enabled()
+    {
+        return this._dragToAdjustController.enabled;
+    }
+
+    set enabled(enabled)
+    {
+        if (this.enabled === enabled)
+            return;
+
+        this._dragToAdjustController.element = this._codeMirror.getWrapperElement();
+        this._dragToAdjustController.enabled = enabled;
+    }
+
+    // Protected
+
+    dragToAdjustControllerActiveStateChanged(dragToAdjustController)
+    {
+        if (!dragToAdjustController.active)
+            this._hoveredTokenInfo = null;
+    }
+
+    dragToAdjustControllerCanBeActivated(dragToAdjustController)
+    {
+        return !this._codeMirror.getOption("readOnly");
+    }
+
+    dragToAdjustControllerCanBeAdjusted(dragToAdjustController)
+    {
+
+        return this._hoveredTokenInfo && this._hoveredTokenInfo.containsNumber;
+    }
+
+    dragToAdjustControllerWasAdjustedByAmount(dragToAdjustController, amount)
+    {
+        this._codeMirror.alterNumberInRange(amount, this._hoveredTokenInfo.startPosition, this._hoveredTokenInfo.endPosition, false);
+    }
+
+    dragToAdjustControllerDidReset(dragToAdjustController)
+    {
+        this._hoveredTokenInfo = null;
+    }
+
+    dragToAdjustControllerCanAdjustObjectAtPoint(dragToAdjustController, point)
+    {
+        var position = this._codeMirror.coordsChar({left: point.x, top: point.y});
+        var token = this._codeMirror.getTokenAt(position);
+
+        if (!token || !token.type || !token.string) {
+            if (this._hoveredTokenInfo)
+                dragToAdjustController.reset();
+            return false;
+        }
+
+        // Stop right here if we're hovering the same token as we were last time.
+        if (this._hoveredTokenInfo && this._hoveredTokenInfo.line === position.line &&
+            this._hoveredTokenInfo.token.start === token.start && this._hoveredTokenInfo.token.end === token.end)
+            return this._hoveredTokenInfo.token.type.indexOf("number") !== -1;
+
+        var containsNumber = token.type.indexOf("number") !== -1;
+        this._hoveredTokenInfo = {
+            token,
+            line: position.line,
+            containsNumber,
+            startPosition: {
+                ch: token.start,
+                line: position.line
+            },
+            endPosition: {
+                ch: token.end,
+                line: position.line
+            }
+        };
+
+        return containsNumber;
+    }
+};
+
+CodeMirror.defineOption("dragToAdjustNumbers", true, function(codeMirror, value, oldValue) {
+    if (!codeMirror.dragToAdjustNumberController)
+        codeMirror.dragToAdjustNumberController = new WI.CodeMirrorDragToAdjustNumberController(codeMirror);
+    codeMirror.dragToAdjustNumberController.enabled = value;
+});

inspector/Controllers/CodeMirrorEditingController.js

@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorEditingController = class CodeMirrorEditingController extends WI.Object
+{
+    constructor(codeMirror, marker)
+    {
+        super();
+
+        this._codeMirror = codeMirror;
+        this._marker = marker;
+        this._delegate = null;
+
+        this._range = marker.range;
+
+        // The value must support .toString() and .copy() methods.
+        this._value = this.initialValue;
+
+        this._keyboardShortcutEsc = new WI.KeyboardShortcut(null, WI.KeyboardShortcut.Key.Escape);
+    }
+
+    // Public
+
+    get marker()
+    {
+        return this._marker;
+    }
+
+    get range()
+    {
+        return this._range;
+    }
+
+    get value()
+    {
+        return this._value;
+    }
+
+    set value(value)
+    {
+        this.text = value.toString();
+        this._value = value;
+    }
+
+    get delegate()
+    {
+        return this._delegate;
+    }
+
+    set delegate(delegate)
+    {
+        this._delegate = delegate;
+    }
+
+    get text()
+    {
+        var from = {line: this._range.startLine, ch: this._range.startColumn};
+        var to = {line: this._range.endLine, ch: this._range.endColumn};
+        return this._codeMirror.getRange(from, to);
+    }
+
+    set text(text)
+    {
+        var from = {line: this._range.startLine, ch: this._range.startColumn};
+        var to = {line: this._range.endLine, ch: this._range.endColumn};
+        this._codeMirror.replaceRange(text, from, to);
+
+        var lines = text.split("\n");
+        var endLine = this._range.startLine + lines.length - 1;
+        var endColumn = lines.length > 1 ? lines.lastValue.length : this._range.startColumn + text.length;
+        this._range = new WI.TextRange(this._range.startLine, this._range.startColumn, endLine, endColumn);
+    }
+
+    get initialValue()
+    {
+        // Implemented by subclasses.
+        return this.text;
+    }
+
+    get cssClassName()
+    {
+        // Implemented by subclasses.
+        return "";
+    }
+
+    get popover()
+    {
+        return this._popover;
+    }
+
+    get popoverPreferredEdges()
+    {
+        // Best to display the popover to the left or above the edited range since its end position may change, but not its start
+        // position. This way we minimize the chances of overlaying the edited range as it changes.
+        return [WI.RectEdge.MIN_X, WI.RectEdge.MIN_Y, WI.RectEdge.MAX_Y, WI.RectEdge.MAX_X];
+    }
+
+    popoverTargetFrameWithRects(rects)
+    {
+        return WI.Rect.unionOfRects(rects);
+    }
+
+    presentHoverMenu()
+    {
+        if (!this.cssClassName)
+            return;
+
+        this._hoverMenu = new WI.HoverMenu(this);
+        this._hoverMenu.element.classList.add(this.cssClassName);
+        this._rects = this._marker.rects;
+        this._hoverMenu.present(this._rects);
+    }
+
+    dismissHoverMenu(discrete)
+    {
+        if (!this._hoverMenu)
+            return;
+
+        this._hoverMenu.dismiss(discrete);
+    }
+
+    popoverWillPresent(popover)
+    {
+        // Implemented by subclasses.
+    }
+
+    popoverDidPresent(popover)
+    {
+        // Implemented by subclasses.
+    }
+
+    popoverDidDismiss(popover)
+    {
+        // Implemented by subclasses.
+    }
+
+    // Protected
+
+    handleKeydownEvent(event)
+    {
+        if (!this._keyboardShortcutEsc.matchesEvent(event) || !this._popover.visible)
+            return false;
+
+        this.value = this._originalValue;
+        this._popover.dismiss();
+
+        return true;
+    }
+
+    hoverMenuButtonWasPressed(hoverMenu)
+    {
+        this._popover = new WI.Popover(this);
+        this.popoverWillPresent(this._popover);
+        this._popover.present(this.popoverTargetFrameWithRects(this._rects).pad(2), this.popoverPreferredEdges);
+        this.popoverDidPresent(this._popover);
+
+        WI.addWindowKeydownListener(this);
+
+        hoverMenu.dismiss();
+
+        if (this._delegate && typeof this._delegate.editingControllerDidStartEditing === "function")
+            this._delegate.editingControllerDidStartEditing(this);
+
+        this._originalValue = this._value.copy();
+    }
+
+    didDismissPopover(popover)
+    {
+        delete this._popover;
+        delete this._originalValue;
+
+        WI.removeWindowKeydownListener(this);
+        this.popoverDidDismiss();
+
+        if (this._delegate && typeof this._delegate.editingControllerDidFinishEditing === "function")
+            this._delegate.editingControllerDidFinishEditing(this);
+    }
+};

inspector/Controllers/CodeMirrorGradientEditingController.js

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2014 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorGradientEditingController = class CodeMirrorGradientEditingController extends WI.CodeMirrorEditingController
+{
+    // Public
+
+    get initialValue()
+    {
+        return WI.Gradient.fromString(this.text);
+    }
+
+    get cssClassName()
+    {
+        return "gradient";
+    }
+
+    get popoverPreferredEdges()
+    {
+        // Since the gradient editor can resize to be quite tall, let's avoid displaying the popover
+        // above the edited value so that it may not change which edge it attaches to upon editing a stop.
+        return [WI.RectEdge.MIN_X, WI.RectEdge.MAX_Y, WI.RectEdge.MAX_X];
+    }
+
+    popoverTargetFrameWithRects(rects)
+    {
+        // If a gradient is defined across several lines, we probably want to use the first line only
+        // as a target frame for the editor since we may reformat the gradient value to fit on a single line.
+        return rects[0];
+    }
+
+    popoverWillPresent(popover)
+    {
+        function handleColorPickerToggled(event)
+        {
+            popover.update();
+        }
+
+        this._gradientEditor = new WI.GradientEditor;
+        this._gradientEditor.addEventListener(WI.GradientEditor.Event.GradientChanged, this._gradientEditorGradientChanged, this);
+        this._gradientEditor.addEventListener(WI.GradientEditor.Event.ColorPickerToggled, handleColorPickerToggled, this);
+        popover.content = this._gradientEditor.element;
+    }
+
+    popoverDidPresent(popover)
+    {
+        this._gradientEditor.gradient = this.value;
+    }
+
+    // Private
+
+    _gradientEditorGradientChanged(event)
+    {
+        this.value = event.data.gradient;
+    }
+};

inspector/Controllers/CodeMirrorSpringEditingController.js

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2016 Devin Rousso <webkit@devinrousso.com>. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorSpringEditingController = class CodeMirrorSpringEditingController extends WI.CodeMirrorEditingController
+{
+    // Public
+
+    get initialValue()
+    {
+        return WI.Spring.fromString(this.text);
+    }
+
+    get cssClassName()
+    {
+        return "spring";
+    }
+
+    popoverWillPresent(popover)
+    {
+        this._springEditor = new WI.SpringEditor;
+        this._springEditor.addEventListener(WI.SpringEditor.Event.SpringChanged, this._springEditorSpringChanged, this);
+        popover.content = this._springEditor.element;
+    }
+
+    popoverDidPresent(popover)
+    {
+        this._springEditor.spring = this.value;
+    }
+
+    // Private
+
+    _springEditorSpringChanged(event)
+    {
+        this.value = event.data.spring;
+    }
+};

inspector/Controllers/CodeMirrorTextKillController.js

@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorTextKillController = class CodeMirrorTextKillController extends WI.Object
+{
+    constructor(codeMirror)
+    {
+        super();
+
+        console.assert(codeMirror);
+
+        this._codeMirror = codeMirror;
+        this._expectingChangeEventForKill = false;
+        this._nextKillStartsNewSequence = true;
+        this._shouldPrependToKillRing = false;
+
+        this._handleTextChangeListener = this._handleTextChange.bind(this);
+        this._handleEditorBlurListener = this._handleEditorBlur.bind(this);
+        this._handleSelectionOrCaretChangeListener = this._handleSelectionOrCaretChange.bind(this);
+
+        // FIXME: these keybindings match CodeMirror's default keymap for OS X.
+        // They should probably be altered for Windows / Linux someday.
+        this._codeMirror.addKeyMap({
+            // Overrides for the 'emacsy' keymap.
+            "Ctrl-K": this._handleTextKillCommand.bind(this, "killLine", false),
+            "Alt-D": this._handleTextKillCommand.bind(this, "delWordAfter", false),
+            // Overrides for the 'macDefault' keymap.
+            "Alt-Delete": this._handleTextKillCommand.bind(this, "delGroupAfter", false),
+            "Cmd-Backspace": this._handleTextKillCommand.bind(this, "delWrappedLineLeft", true),
+            "Cmd-Delete": this._handleTextKillCommand.bind(this, "delWrappedLineRight", false),
+            "Alt-Backspace": this._handleTextKillCommand.bind(this, "delGroupBefore", true),
+            "Ctrl-Alt-Backspace": this._handleTextKillCommand.bind(this, "delGroupAfter", false),
+        });
+    }
+
+    _handleTextKillCommand(command, prependsToKillRing, codeMirror)
+    {
+        // Read-only mode is dynamic in some editors, so check every time
+        // and ignore the shortcut if in read-only mode.
+        if (this._codeMirror.getOption("readOnly"))
+            return;
+
+        this._shouldPrependToKillRing = prependsToKillRing;
+
+        // Don't add the listener if it's still registered because
+        // a previous empty kill didn't generate change events.
+        if (!this._expectingChangeEventForKill)
+            this._codeMirror.on("changes", this._handleTextChangeListener);
+
+        this._expectingChangeEventForKill = true;
+        this._codeMirror.execCommand(command);
+    }
+
+    _handleTextChange(codeMirror, changes)
+    {
+        this._codeMirror.off("changes", this._handleTextChangeListener);
+
+        // Sometimes a second change event fires after removing the listener
+        // if you perform an "empty kill" and type after moving the caret.
+        if (!this._expectingChangeEventForKill)
+            return;
+
+        this._expectingChangeEventForKill = false;
+
+        // It doesn't make sense to get more than one change per kill.
+        console.assert(changes.length === 1);
+        let change = changes[0];
+
+        // If an "empty kill" is followed by up/down or typing,
+        // the empty kill won't fire a change event, then we'll get an
+        // unrelated change event that shouldn't be treated as a kill.
+        if (change.origin !== "+delete")
+            return;
+
+        // When killed text includes a newline, CodeMirror returns
+        // strange change objects. Special-case for when this could happen.
+        let killedText;
+        if (change.to.line === change.from.line + 1 && change.removed.length === 2) {
+            // An entire line was deleted, including newline (deleteLine).
+            if (change.removed[0].length && !change.removed[1].length)
+                killedText = change.removed[0] + "\n";
+            // A newline was killed by itself (Ctrl-K).
+            else
+                killedText = "\n";
+        } else {
+            console.assert(change.removed.length === 1);
+            killedText = change.removed[0];
+        }
+
+        InspectorFrontendHost.killText(killedText, this._shouldPrependToKillRing, this._nextKillStartsNewSequence);
+
+        // If the editor loses focus or the caret / selection changes
+        // (not as a result of the kill), then the next kill should
+        // start a new kill ring sequence.
+        this._nextKillStartsNewSequence = false;
+        this._codeMirror.on("blur", this._handleEditorBlurListener);
+        this._codeMirror.on("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+
+    _handleEditorBlur(codeMirror)
+    {
+        this._nextKillStartsNewSequence = true;
+        this._codeMirror.off("blur", this._handleEditorBlurListener);
+        this._codeMirror.off("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+
+    _handleSelectionOrCaretChange(codeMirror)
+    {
+        if (this._expectingChangeEventForKill)
+            return;
+
+        this._nextKillStartsNewSequence = true;
+        this._codeMirror.off("blur", this._handleEditorBlurListener);
+        this._codeMirror.off("cursorActivity", this._handleSelectionOrCaretChangeListener);
+    }
+};

inspector/Controllers/CodeMirrorTokenTrackingController.css

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.CodeMirror .jump-to-symbol-highlight {
+    color: blue !important;
+    text-decoration: underline !important;
+    cursor: pointer !important;
+    -webkit-text-stroke-width: 0 !important;
+}

inspector/Controllers/CodeMirrorTokenTrackingController.js

@@ -0,0 +1,636 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CodeMirrorTokenTrackingController = class CodeMirrorTokenTrackingController extends WI.Object
+{
+    constructor(codeMirror, delegate)
+    {
+        super();
+
+        console.assert(codeMirror);
+
+        this._codeMirror = codeMirror;
+        this._delegate = delegate || null;
+        this._mode = WI.CodeMirrorTokenTrackingController.Mode.None;
+
+        this._mouseOverDelayDuration = 0;
+        this._mouseOutReleaseDelayDuration = 0;
+        this._classNameForHighlightedRange = null;
+
+        this._enabled = false;
+        this._tracking = false;
+        this._previousTokenInfo = null;
+        this._hoveredMarker = null;
+        this._ignoreNextMouseMove = false;
+
+        const hidePopover = this._hidePopover.bind(this);
+
+        this._codeMirror.addKeyMap({
+            "Cmd-Enter": this._handleCommandEnterKey.bind(this),
+            "Esc": hidePopover
+        });
+
+        this._codeMirror.on("cursorActivity", hidePopover);
+    }
+
+    // Public
+
+    get delegate()
+    {
+        return this._delegate;
+    }
+
+    set delegate(x)
+    {
+        this._delegate = x;
+    }
+
+    get enabled()
+    {
+        return this._enabled;
+    }
+
+    set enabled(enabled)
+    {
+        if (this._enabled === enabled)
+            return;
+
+        this._enabled = enabled;
+
+        var wrapper = this._codeMirror.getWrapperElement();
+        if (enabled) {
+            wrapper.addEventListener("mouseenter", this);
+            wrapper.addEventListener("mouseleave", this);
+            this._updateHoveredTokenInfo({left: WI.mouseCoords.x, top: WI.mouseCoords.y});
+            this._startTracking();
+        } else {
+            wrapper.removeEventListener("mouseenter", this);
+            wrapper.removeEventListener("mouseleave", this);
+            this._stopTracking();
+        }
+    }
+
+    get mode()
+    {
+        return this._mode;
+    }
+
+    set mode(mode)
+    {
+        var oldMode = this._mode;
+
+        this._mode = mode || WI.CodeMirrorTokenTrackingController.Mode.None;
+
+        if (oldMode !== this._mode && this._tracking && this._previousTokenInfo)
+            this._processNewHoveredToken(this._previousTokenInfo);
+    }
+
+    get mouseOverDelayDuration()
+    {
+        return this._mouseOverDelayDuration;
+    }
+
+    set mouseOverDelayDuration(x)
+    {
+        console.assert(x >= 0);
+        this._mouseOverDelayDuration = Math.max(x, 0);
+    }
+
+    get mouseOutReleaseDelayDuration()
+    {
+        return this._mouseOutReleaseDelayDuration;
+    }
+
+    set mouseOutReleaseDelayDuration(x)
+    {
+        console.assert(x >= 0);
+        this._mouseOutReleaseDelayDuration = Math.max(x, 0);
+    }
+
+    get classNameForHighlightedRange()
+    {
+        return this._classNameForHighlightedRange;
+    }
+
+    set classNameForHighlightedRange(x)
+    {
+        this._classNameForHighlightedRange = x || null;
+    }
+
+    get candidate()
+    {
+        return this._candidate;
+    }
+
+    get hoveredMarker()
+    {
+        return this._hoveredMarker;
+    }
+
+    set hoveredMarker(hoveredMarker)
+    {
+        this._hoveredMarker = hoveredMarker;
+    }
+
+    highlightLastHoveredRange()
+    {
+        if (this._candidate)
+            this.highlightRange(this._candidate.hoveredTokenRange);
+    }
+
+    highlightRange(range)
+    {
+        // Nothing to do if we're trying to highlight the same range.
+        if (this._codeMirrorMarkedText && this._codeMirrorMarkedText.className === this._classNameForHighlightedRange) {
+            var highlightedRange = this._codeMirrorMarkedText.find();
+            if (!highlightedRange)
+                return;
+            if (WI.compareCodeMirrorPositions(highlightedRange.from, range.start) === 0 &&
+                WI.compareCodeMirrorPositions(highlightedRange.to, range.end) === 0)
+                return;
+        }
+
+        this.removeHighlightedRange();
+
+        var className = this._classNameForHighlightedRange || "";
+        this._codeMirrorMarkedText = this._codeMirror.markText(range.start, range.end, {className});
+
+        window.addEventListener("mousemove", this, true);
+    }
+
+    removeHighlightedRange()
+    {
+        if (!this._codeMirrorMarkedText)
+            return;
+
+        this._codeMirrorMarkedText.clear();
+        this._codeMirrorMarkedText = null;
+
+        window.removeEventListener("mousemove", this, true);
+    }
+
+    // Private
+
+    _startTracking()
+    {
+        if (this._tracking)
+            return;
+
+        this._tracking = true;
+        this._ignoreNextMouseMove = false;
+
+        var wrapper = this._codeMirror.getWrapperElement();
+        wrapper.addEventListener("mousemove", this, true);
+        wrapper.addEventListener("mouseout", this, false);
+        wrapper.addEventListener("mousedown", this, false);
+        wrapper.addEventListener("mouseup", this, false);
+        wrapper.addEventListener("mousewheel", this, false);
+        window.addEventListener("blur", this, true);
+    }
+
+    _stopTracking()
+    {
+        if (!this._tracking)
+            return;
+
+        this._tracking = false;
+        this._candidate = null;
+
+        var wrapper = this._codeMirror.getWrapperElement();
+        wrapper.removeEventListener("mousemove", this, true);
+        wrapper.removeEventListener("mouseout", this, false);
+        wrapper.removeEventListener("mousedown", this, false);
+        wrapper.removeEventListener("mouseup", this, false);
+        wrapper.removeEventListener("mousewheel", this, false);
+        window.removeEventListener("blur", this, true);
+        window.removeEventListener("mousemove", this, true);
+
+        this._resetTrackingStates();
+    }
+
+    handleEvent(event)
+    {
+        switch (event.type) {
+        case "mouseenter":
+            this._mouseEntered(event);
+            break;
+        case "mouseleave":
+            this._mouseLeft(event);
+            break;
+        case "mousemove":
+            if (event.currentTarget === window)
+                this._mouseMovedWithMarkedText(event);
+            else
+                this._mouseMovedOverEditor(event);
+            break;
+        case "mouseout":
+            // Only deal with a mouseout event that has the editor wrapper as the target.
+            if (!event.currentTarget.contains(event.relatedTarget))
+                this._mouseMovedOutOfEditor(event);
+            break;
+        case "mousedown":
+            this._mouseButtonWasPressedOverEditor(event);
+            break;
+        case "mouseup":
+            this._mouseButtonWasReleasedOverEditor(event);
+            break;
+        case "mousewheel":
+            this._ignoreNextMouseMove = true;
+            break;
+        case "blur":
+            this._windowLostFocus(event);
+            break;
+        }
+    }
+
+    _handleCommandEnterKey(codeMirror)
+    {
+        const tokenInfo = this._getTokenInfoForPosition(codeMirror.getCursor("head"));
+        tokenInfo.triggeredBy = WI.CodeMirrorTokenTrackingController.TriggeredBy.Keyboard;
+        this._processNewHoveredToken(tokenInfo);
+    }
+
+    _hidePopover()
+    {
+        if (!this._candidate)
+            return CodeMirror.Pass;
+
+        if (this._delegate && typeof this._delegate.tokenTrackingControllerHighlightedRangeReleased === "function") {
+            const forceHidePopover = true;
+            this._delegate.tokenTrackingControllerHighlightedRangeReleased(this, forceHidePopover);
+        }
+    }
+
+    _mouseEntered(event)
+    {
+        if (!this._tracking)
+            this._startTracking();
+    }
+
+    _mouseLeft(event)
+    {
+        this._stopTracking();
+    }
+
+    _mouseMovedWithMarkedText(event)
+    {
+        if (this._candidate && this._candidate.triggeredBy === WI.CodeMirrorTokenTrackingController.TriggeredBy.Keyboard)
+            return;
+
+        var shouldRelease = !event.target.classList.contains(this._classNameForHighlightedRange);
+        if (shouldRelease && this._delegate && typeof this._delegate.tokenTrackingControllerCanReleaseHighlightedRange === "function")
+            shouldRelease = this._delegate.tokenTrackingControllerCanReleaseHighlightedRange(this, event.target);
+
+        if (shouldRelease) {
+            if (!this._markedTextMouseoutTimer)
+                this._markedTextMouseoutTimer = setTimeout(this._markedTextIsNoLongerHovered.bind(this), this._mouseOutReleaseDelayDuration);
+            return;
+        }
+
+        if (this._markedTextMouseoutTimer)
+            clearTimeout(this._markedTextMouseoutTimer);
+
+        this._markedTextMouseoutTimer = 0;
+    }
+
+    _markedTextIsNoLongerHovered()
+    {
+        if (this._delegate && typeof this._delegate.tokenTrackingControllerHighlightedRangeReleased === "function")
+            this._delegate.tokenTrackingControllerHighlightedRangeReleased(this);
+
+        this._markedTextMouseoutTimer = 0;
+    }
+
+    _mouseMovedOverEditor(event)
+    {
+        if (this._ignoreNextMouseMove) {
+            this._ignoreNextMouseMove = false;
+            return;
+        }
+
+        this._updateHoveredTokenInfo({left: event.pageX, top: event.pageY});
+    }
+
+    _updateHoveredTokenInfo(mouseCoords)
+    {
+        // Get the position in the text and the token at that position.
+        var position = this._codeMirror.coordsChar(mouseCoords);
+        var token = this._codeMirror.getTokenAt(position);
+
+        if (!token || !token.type || !token.string) {
+            if (this._hoveredMarker && this._delegate && typeof this._delegate.tokenTrackingControllerMouseOutOfHoveredMarker === "function") {
+                if (!this._codeMirror.findMarksAt(position).includes(this._hoveredMarker.codeMirrorTextMarker))
+                    this._delegate.tokenTrackingControllerMouseOutOfHoveredMarker(this, this._hoveredMarker);
+            }
+
+            this._resetTrackingStates();
+            return;
+        }
+
+        // Stop right here if we're hovering the same token as we were last time.
+        if (this._previousTokenInfo &&
+            this._previousTokenInfo.position.line === position.line &&
+            this._previousTokenInfo.token.start === token.start &&
+            this._previousTokenInfo.token.end === token.end)
+            return;
+
+        // We have a new hovered token.
+        var tokenInfo = this._previousTokenInfo = this._getTokenInfoForPosition(position);
+
+        if (/\bmeta\b/.test(token.type)) {
+            let nextTokenPosition = Object.shallowCopy(position);
+            nextTokenPosition.ch = tokenInfo.token.end + 1;
+
+            let nextToken = this._codeMirror.getTokenAt(nextTokenPosition);
+            if (nextToken && nextToken.type && !/\bmeta\b/.test(nextToken.type)) {
+                console.assert(tokenInfo.token.end === nextToken.start);
+
+                tokenInfo.token.type = nextToken.type;
+                tokenInfo.token.string = tokenInfo.token.string + nextToken.string;
+                tokenInfo.token.end = nextToken.end;
+            }
+        } else {
+            let previousTokenPosition = Object.shallowCopy(position);
+            previousTokenPosition.ch = tokenInfo.token.start - 1;
+
+            let previousToken = this._codeMirror.getTokenAt(previousTokenPosition);
+            if (previousToken && previousToken.type && /\bmeta\b/.test(previousToken.type)) {
+                console.assert(tokenInfo.token.start === previousToken.end);
+
+                tokenInfo.token.string = previousToken.string + tokenInfo.token.string;
+                tokenInfo.token.start = previousToken.start;
+            }
+        }
+
+        if (this._tokenHoverTimer)
+            clearTimeout(this._tokenHoverTimer);
+
+        this._tokenHoverTimer = 0;
+
+        if (this._codeMirrorMarkedText || !this._mouseOverDelayDuration)
+            this._processNewHoveredToken(tokenInfo);
+        else
+            this._tokenHoverTimer = setTimeout(this._processNewHoveredToken.bind(this, tokenInfo), this._mouseOverDelayDuration);
+    }
+
+    _getTokenInfoForPosition(position)
+    {
+        var token = this._codeMirror.getTokenAt(position);
+        var innerMode = CodeMirror.innerMode(this._codeMirror.getMode(), token.state);
+        var codeMirrorModeName = innerMode.mode.alternateName || innerMode.mode.name;
+        return {
+            token,
+            position,
+            innerMode,
+            modeName: codeMirrorModeName
+        };
+    }
+
+    _mouseMovedOutOfEditor(event)
+    {
+        if (this._tokenHoverTimer)
+            clearTimeout(this._tokenHoverTimer);
+
+        this._tokenHoverTimer = 0;
+        this._previousTokenInfo = null;
+        this._selectionMayBeInProgress = false;
+    }
+
+    _mouseButtonWasPressedOverEditor(event)
+    {
+        this._selectionMayBeInProgress = true;
+    }
+
+    _mouseButtonWasReleasedOverEditor(event)
+    {
+        this._selectionMayBeInProgress = false;
+        this._mouseMovedOverEditor(event);
+
+        if (this._codeMirrorMarkedText && this._previousTokenInfo) {
+            var position = this._codeMirror.coordsChar({left: event.pageX, top: event.pageY});
+            var marks = this._codeMirror.findMarksAt(position);
+            for (var i = 0; i < marks.length; ++i) {
+                if (marks[i] === this._codeMirrorMarkedText) {
+                    if (this._delegate && typeof this._delegate.tokenTrackingControllerHighlightedRangeWasClicked === "function")
+                        this._delegate.tokenTrackingControllerHighlightedRangeWasClicked(this);
+
+                    break;
+                }
+            }
+        }
+    }
+
+    _windowLostFocus(event)
+    {
+        this._resetTrackingStates();
+    }
+
+    _processNewHoveredToken(tokenInfo)
+    {
+        console.assert(tokenInfo);
+
+        if (this._selectionMayBeInProgress)
+            return;
+
+        this._candidate = null;
+
+        switch (this._mode) {
+        case WI.CodeMirrorTokenTrackingController.Mode.NonSymbolTokens:
+            this._candidate = this._processNonSymbolToken(tokenInfo);
+            break;
+        case WI.CodeMirrorTokenTrackingController.Mode.JavaScriptExpression:
+        case WI.CodeMirrorTokenTrackingController.Mode.JavaScriptTypeInformation:
+            this._candidate = this._processJavaScriptExpression(tokenInfo);
+            break;
+        case WI.CodeMirrorTokenTrackingController.Mode.MarkedTokens:
+            this._candidate = this._processMarkedToken(tokenInfo);
+            break;
+        }
+
+        if (!this._candidate)
+            return;
+
+        this._candidate.triggeredBy = tokenInfo.triggeredBy;
+
+        if (this._markedTextMouseoutTimer)
+            clearTimeout(this._markedTextMouseoutTimer);
+
+        this._markedTextMouseoutTimer = 0;
+
+        if (this._delegate && typeof this._delegate.tokenTrackingControllerNewHighlightCandidate === "function")
+            this._delegate.tokenTrackingControllerNewHighlightCandidate(this, this._candidate);
+    }
+
+    _processNonSymbolToken(tokenInfo)
+    {
+        // Ignore any symbol tokens.
+        var type = tokenInfo.token.type;
+        if (!type)
+            return null;
+
+        var startPosition = {line: tokenInfo.position.line, ch: tokenInfo.token.start};
+        var endPosition = {line: tokenInfo.position.line, ch: tokenInfo.token.end};
+
+        return {
+            hoveredToken: tokenInfo.token,
+            hoveredTokenRange: {start: startPosition, end: endPosition},
+        };
+    }
+
+    _processJavaScriptExpression(tokenInfo)
+    {
+        // Only valid within JavaScript.
+        if (tokenInfo.modeName !== "javascript")
+            return null;
+
+        var startPosition = {line: tokenInfo.position.line, ch: tokenInfo.token.start};
+        var endPosition = {line: tokenInfo.position.line, ch: tokenInfo.token.end};
+
+        function tokenIsInRange(token, range)
+        {
+            return token.line >= range.start.line && token.ch >= range.start.ch &&
+                   token.line <= range.end.line && token.ch <= range.end.ch;
+        }
+
+        // If the hovered token is within a selection, use the selection as our expression.
+        if (this._codeMirror.somethingSelected()) {
+            var selectionRange = {
+                start: this._codeMirror.getCursor("start"),
+                end: this._codeMirror.getCursor("end")
+            };
+
+            if (tokenIsInRange(startPosition, selectionRange) || tokenIsInRange(endPosition, selectionRange)) {
+                return {
+                    hoveredToken: tokenInfo.token,
+                    hoveredTokenRange: selectionRange,
+                    expression: this._codeMirror.getSelection(),
+                    expressionRange: selectionRange,
+                };
+            }
+        }
+
+        // We only handle vars, definitions, properties, and the keyword 'this'.
+        var type = tokenInfo.token.type;
+        var isProperty = type.indexOf("property") !== -1;
+        var isKeyword = type.indexOf("keyword") !== -1;
+        if (!isProperty && !isKeyword && type.indexOf("variable") === -1 && type.indexOf("def") === -1)
+            return null;
+
+        // Not object literal property names, but yes if an object literal shorthand property, which is a variable.
+        let state = tokenInfo.innerMode.state;
+        if (isProperty && state.lexical && state.lexical.type === "}") {
+            // Peek ahead to see if the next token is "}" or ",". If it is, we are a shorthand and therefore a variable.
+            let shorthand = false;
+            let mode = tokenInfo.innerMode.mode;
+            let position = {line: tokenInfo.position.line, ch: tokenInfo.token.end};
+            WI.walkTokens(this._codeMirror, mode, position, function(tokenType, string) {
+                if (tokenType)
+                    return false;
+                if (string === "(")
+                    return false;
+                if (string === "," || string === "}") {
+                    shorthand = true;
+                    return false;
+                }
+                return true;
+            });
+
+            if (!shorthand)
+                return null;
+        }
+
+        // Only the "this" keyword.
+        if (isKeyword && tokenInfo.token.string !== "this")
+            return null;
+
+        // Work out the full hovered expression.
+        var expression = tokenInfo.token.string;
+        var expressionStartPosition = {line: tokenInfo.position.line, ch: tokenInfo.token.start};
+        while (true) {
+            var token = this._codeMirror.getTokenAt(expressionStartPosition);
+            if (!token)
+                break;
+
+            var isDot = !token.type && token.string === ".";
+            var isExpression = token.type && token.type.includes("m-javascript");
+            if (!isDot && !isExpression)
+                break;
+
+            if (isExpression) {
+                // Disallow operators. We want the hovered expression to be just a single operand.
+                // Also, some operators can modify values, such as pre-increment and assignment operators.
+                if (token.type.includes("operator"))
+                    break;
+
+                // Don't break out of a template string quasi group.
+                if (token.type.includes("string-2"))
+                    break;
+            }
+
+            expression = token.string + expression;
+            expressionStartPosition.ch = token.start;
+        }
+
+        // Return the candidate for this token and expression.
+        return {
+            hoveredToken: tokenInfo.token,
+            hoveredTokenRange: {start: startPosition, end: endPosition},
+            expression,
+            expressionRange: {start: expressionStartPosition, end: endPosition},
+        };
+    }
+
+    _processMarkedToken(tokenInfo)
+    {
+        return this._processNonSymbolToken(tokenInfo);
+    }
+
+    _resetTrackingStates()
+    {
+        if (this._tokenHoverTimer)
+            clearTimeout(this._tokenHoverTimer);
+
+        this._tokenHoverTimer = 0;
+
+        this._selectionMayBeInProgress = false;
+        this._previousTokenInfo = null;
+        this.removeHighlightedRange();
+    }
+};
+
+WI.CodeMirrorTokenTrackingController.JumpToSymbolHighlightStyleClassName = "jump-to-symbol-highlight";
+
+WI.CodeMirrorTokenTrackingController.Mode = {
+    None: "none",
+    NonSymbolTokens: "non-symbol-tokens",
+    JavaScriptExpression: "javascript-expression",
+    JavaScriptTypeInformation: "javascript-type-information",
+    MarkedTokens: "marked-tokens"
+};
+
+WI.CodeMirrorTokenTrackingController.TriggeredBy = {
+    Keyboard: "keyboard",
+    Hover: "hover"
+};

inspector/Controllers/ConsoleManager.js

@@ -0,0 +1,301 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2015 Tobias Reiss <tobi+webkit@basecode.de>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ConsoleManager = class ConsoleManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._warningCount = 0;
+        this._errorCount = 0;
+        this._issues = [];
+
+        this._lastMessageLevel = null;
+        this._clearMessagesRequested = false;
+        this._isNewPageOrReload = false;
+        this._remoteObjectsToRelease = null;
+
+        this._customLoggingChannels = [];
+
+        this._snippets = new Set;
+        this._restoringSnippets = false;
+
+        WI.ConsoleSnippet.addEventListener(WI.SourceCode.Event.ContentDidChange, this._handleSnippetContentChanged, this);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+
+        WI.Target.registerInitializationPromise((async () => {
+            let serializedSnippets = await WI.objectStores.consoleSnippets.getAll();
+
+            this._restoringSnippets = true;
+            for (let serializedSnippet of serializedSnippets) {
+                let snippet = WI.ConsoleSnippet.fromJSON(serializedSnippet);
+
+                const key = null;
+                WI.objectStores.consoleSnippets.associateObject(snippet, key, serializedSnippet);
+
+                this.addSnippet(snippet);
+            }
+            this._restoringSnippets = false;
+        })());
+    }
+
+    // Static
+
+    static supportsLogChannels()
+    {
+        return InspectorBackend.hasCommand("Console.getLoggingChannels");
+    }
+
+    static issueMatchSourceCode(issue, sourceCode)
+    {
+        if (sourceCode instanceof WI.SourceMapResource)
+            return issue.sourceCodeLocation && issue.sourceCodeLocation.displaySourceCode === sourceCode;
+        if (sourceCode instanceof WI.Resource)
+            return issue.url === sourceCode.url && (!issue.sourceCodeLocation || issue.sourceCodeLocation.sourceCode === sourceCode);
+        if (sourceCode instanceof WI.Script)
+            return issue.sourceCodeLocation && issue.sourceCodeLocation.sourceCode === sourceCode;
+        return false;
+    }
+
+    // Public
+
+    get warningCount() { return this._warningCount; }
+    get errorCount() { return this._errorCount; }
+    get snippets() { return this._snippets; }
+    get customLoggingChannels() { return this._customLoggingChannels; }
+
+    issuesForSourceCode(sourceCode)
+    {
+        var issues = [];
+
+        for (var i = 0; i < this._issues.length; ++i) {
+            var issue = this._issues[i];
+            if (WI.ConsoleManager.issueMatchSourceCode(issue, sourceCode))
+                issues.push(issue);
+        }
+
+        return issues;
+    }
+
+    releaseRemoteObjectWithConsoleClear(remoteObject)
+    {
+        if (!this._remoteObjectsToRelease)
+            this._remoteObjectsToRelease = new Set;
+        this._remoteObjectsToRelease.add(remoteObject);
+    }
+
+    addSnippet(snippet)
+    {
+        console.assert(snippet instanceof WI.ConsoleSnippet, snippet);
+        console.assert(!this._snippets.has(snippet), snippet);
+        console.assert(!this._snippets.some((existingSnippet) => snippet.contentIdentifier === existingSnippet.contentIdentifier), snippet);
+
+        this._snippets.add(snippet);
+
+        if (!this._restoringSnippets)
+            WI.objectStores.consoleSnippets.putObject(snippet);
+
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.SnippetAdded, {snippet});
+    }
+
+    removeSnippet(snippet)
+    {
+        console.assert(snippet instanceof WI.ConsoleSnippet, snippet);
+        console.assert(this._snippets.has(snippet), snippet);
+
+        this._snippets.delete(snippet);
+
+        if (!this._restoringSnippets)
+            WI.objectStores.consoleSnippets.deleteObject(snippet);
+
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.SnippetRemoved, {snippet});
+    }
+
+    // ConsoleObserver
+
+    messageWasAdded(target, source, level, text, type, url, line, column, repeatCount, parameters, stackTrace, requestId, timestamp)
+    {
+        // FIXME: Get a request from request ID.
+
+        if (parameters)
+            parameters = parameters.map((x) => WI.RemoteObject.fromPayload(x, target));
+
+        // COMPATIBILITY (macOS 13.0, iOS 16.0): `stackTrace` was an array of `Console.CallFrame`.
+        if (Array.isArray(stackTrace))
+            stackTrace = {callFrames: stackTrace};
+        if (stackTrace)
+            stackTrace = WI.StackTrace.fromPayload(target, stackTrace);
+
+        const request = null;
+        let message = new WI.ConsoleMessage(target, source, level, text, type, url, line, column, repeatCount, parameters, stackTrace, request, timestamp);
+
+        this._incrementMessageLevelCount(message.level, message.repeatCount);
+
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.MessageAdded, {message});
+
+        if (message.level === WI.ConsoleMessage.MessageLevel.Warning || message.level === WI.ConsoleMessage.MessageLevel.Error) {
+            let issue = new WI.IssueMessage(message);
+            this._issues.push(issue);
+
+            this.dispatchEventToListeners(WI.ConsoleManager.Event.IssueAdded, {issue});
+        }
+    }
+
+    messagesCleared()
+    {
+        if (this._remoteObjectsToRelease) {
+            for (let remoteObject of this._remoteObjectsToRelease)
+                remoteObject.release();
+            this._remoteObjectsToRelease = null;
+        }
+
+        WI.ConsoleCommandResultMessage.clearMaximumSavedResultIndex();
+
+        if (this._clearMessagesRequested) {
+            // Frontend requested "clear console" and Backend successfully completed the request.
+            this._clearMessagesRequested = false;
+
+            this._warningCount = 0;
+            this._errorCount = 0;
+            this._issues = [];
+
+            this._lastMessageLevel = null;
+
+            this.dispatchEventToListeners(WI.ConsoleManager.Event.Cleared);
+        } else {
+            // Received an unrequested clear console event.
+            // This could be for a navigation or other reasons (like console.clear()).
+            // If this was a reload, we may not want to dispatch WI.ConsoleManager.Event.Cleared.
+            // To detect if this is a reload we wait a turn and check if there was a main resource change reload.
+            setTimeout(this._delayedMessagesCleared.bind(this), 0);
+        }
+    }
+
+    messageRepeatCountUpdated(count, timestamp)
+    {
+        this._incrementMessageLevelCount(this._lastMessageLevel, 1);
+
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.PreviousMessageRepeatCountUpdated, {count, timestamp});
+    }
+
+    requestClearMessages()
+    {
+        this._clearMessagesRequested = true;
+
+        for (let target of WI.targets)
+            target.ConsoleAgent.clearMessages();
+    }
+
+    initializeLogChannels(target)
+    {
+        console.assert(target.hasDomain("Console"));
+
+        if (!WI.ConsoleManager.supportsLogChannels())
+            return;
+
+        if (this._customLoggingChannels.length)
+            return;
+
+        target.ConsoleAgent.getLoggingChannels((error, channels) => {
+            if (error)
+                return;
+
+            this._customLoggingChannels = channels.map(WI.LoggingChannel.fromPayload);
+        });
+    }
+
+    // Private
+
+    _incrementMessageLevelCount(level, count)
+    {
+        switch (level) {
+        case WI.ConsoleMessage.MessageLevel.Warning:
+            this._warningCount += count;
+            break;
+        case WI.ConsoleMessage.MessageLevel.Error:
+            this._errorCount += count;
+            break;
+        }
+
+        this._lastMessageLevel = level;
+    }
+
+    _delayedMessagesCleared()
+    {
+        if (this._isNewPageOrReload) {
+            this._isNewPageOrReload = false;
+
+            if (!WI.settings.clearLogOnNavigate.value)
+                return;
+        }
+
+        this._warningCount = 0;
+        this._errorCount = 0;
+        this._issues = [];
+
+        this._lastMessageLevel = null;
+
+        // A console.clear() or command line clear() happened.
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.Cleared);
+    }
+
+    _handleSnippetContentChanged(event)
+    {
+        let snippet = event.target;
+
+        console.assert(this._snippets.has(snippet), snippet);
+
+        WI.objectStores.consoleSnippets.putObject(snippet);
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (!event.target.isMainFrame())
+            return;
+
+        this._isNewPageOrReload = true;
+
+        let timestamp = Date.now();
+        let wasReloaded = event.data.oldMainResource && event.data.oldMainResource.url === event.target.mainResource.url;
+        this.dispatchEventToListeners(WI.ConsoleManager.Event.SessionStarted, {timestamp, wasReloaded});
+
+        WI.ConsoleCommandResultMessage.clearMaximumSavedResultIndex();
+    }
+};
+
+WI.ConsoleManager.Event = {
+    SessionStarted: "console-manager-session-was-started",
+    Cleared: "console-manager-cleared",
+    MessageAdded: "console-manager-message-added",
+    IssueAdded: "console-manager-issue-added",
+    PreviousMessageRepeatCountUpdated: "console-manager-previous-message-repeat-count-updated",
+    SnippetAdded: "console-manager-snippet-added",
+    SnippetRemoved: "console-manager-snippet-removed",
+};

inspector/Controllers/DOMManager.js

@@ -0,0 +1,899 @@
+/*
+ * Copyright (C) 2009, 2010 Google Inc. All rights reserved.
+ * Copyright (C) 2009 Joseph Pecoraro
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: DOMManager lacks advanced multi-target support. (DOMNodes per-target)
+
+WI.DOMManager = class DOMManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._idToDOMNode = {};
+        this._document = null;
+        this._documentPromise = null;
+        this._attributeLoadNodeIds = {};
+        this._restoreSelectedNodeIsAllowed = true;
+        this._loadNodeAttributesTimeout = 0;
+        this._inspectedNode = null;
+
+        this._breakpointsForEventListeners = new Map;
+
+        this._hasRequestedDocument = false;
+        this._pendingDocumentRequestCallbacks = null;
+
+        WI.EventBreakpoint.addEventListener(WI.Breakpoint.Event.DisabledStateDidChange, this._handleEventBreakpointDisabledStateChanged, this);
+        WI.EventBreakpoint.addEventListener(WI.Breakpoint.Event.ConditionDidChange, this._handleEventBreakpointEditablePropertyChanged, this);
+        WI.EventBreakpoint.addEventListener(WI.Breakpoint.Event.IgnoreCountDidChange, this._handleEventBreakpointEditablePropertyChanged, this);
+        WI.EventBreakpoint.addEventListener(WI.Breakpoint.Event.AutoContinueDidChange, this._handleEventBreakpointEditablePropertyChanged, this);
+        WI.EventBreakpoint.addEventListener(WI.Breakpoint.Event.ActionsDidChange, this._handleEventBreakpointActionsChanged, this);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        // FIXME: This should be improved when adding better DOM multi-target support since it is really per-target.
+        // This currently uses a setTimeout since it doesn't need to happen immediately, and DOMManager uses the
+        // global DOMAgent to request the document, so we want to make sure we've transitioned the global agents
+        // to this target if necessary.
+        if (target.hasDomain("DOM")) {
+            setTimeout(() => {
+                this.ensureDocument();
+            });
+
+            if (WI.engineeringSettingsAllowed()) {
+                if (DOMManager.supportsEditingUserAgentShadowTrees({target}))
+                    target.DOMAgent.setAllowEditingUserAgentShadowTrees(WI.settings.engineeringAllowEditingUserAgentShadowTrees.value);
+            }
+        }
+    }
+
+    transitionPageTarget()
+    {
+        this._documentUpdated();
+    }
+
+    // Static
+
+    static buildHighlightConfig(mode)
+    {
+        mode = mode || "all";
+
+        let highlightConfig = {showInfo: mode === "all"};
+
+        if (mode === "all" || mode === "content")
+            highlightConfig.contentColor = {r: 111, g: 168, b: 220, a: 0.66};
+
+        if (mode === "all" || mode === "padding")
+            highlightConfig.paddingColor = {r: 147, g: 196, b: 125, a: 0.66};
+
+        if (mode === "all" || mode === "border")
+            highlightConfig.borderColor = {r: 255, g: 229, b: 153, a: 0.66};
+
+        if (mode === "all" || mode === "margin")
+            highlightConfig.marginColor = {r: 246, g: 178, b: 107, a: 0.66};
+
+        return highlightConfig;
+    }
+
+    static wrapClientCallback(callback)
+    {
+        if (!callback)
+            return null;
+
+        return function(error, result) {
+            if (error)
+                console.error("Error during DOMAgent operation: " + error);
+            callback(error ? null : result);
+        };
+    }
+
+    static supportsEventListenerBreakpoints()
+    {
+        return InspectorBackend.hasCommand("DOM.setBreakpointForEventListener")
+            && InspectorBackend.hasCommand("DOM.removeBreakpointForEventListener");
+    }
+
+    static supportsEventListenerBreakpointConfiguration()
+    {
+        // COMPATIBILITY (iOS 14): DOM.setBreakpointForEventListener did not have an "options" parameter yet.
+        return InspectorBackend.hasCommand("DOM.setBreakpointForEventListener", "options");
+    }
+
+    static supportsEditingUserAgentShadowTrees({frontendOnly, target} = {})
+    {
+        target = target || InspectorBackend;
+        return WI.settings.engineeringAllowEditingUserAgentShadowTrees.value
+            && (frontendOnly || target.hasCommand("DOM.setAllowEditingUserAgentShadowTrees"));
+
+    }
+
+    // Public
+
+    get inspectedNode() { return this._inspectedNode; }
+
+    get eventListenerBreakpoints()
+    {
+        return Array.from(this._breakpointsForEventListeners.values());
+    }
+
+    *attachedNodes({filter} = {})
+    {
+        if (!this._document)
+            return;
+
+        filter ??= (node) => true;
+
+        // Traverse the node tree in the same order items would appear if the entire tree were expanded in order to
+        // provide a predictable order for the results.
+        let currentBranch = [this._document];
+        while (currentBranch.length) {
+            let currentNode = currentBranch.at(-1);
+
+            if (filter(currentNode))
+                yield currentNode;
+
+            // The `::before` pseudo element is the first child of any node.
+            let beforePseudoElement = currentNode.beforePseudoElement();
+            if (beforePseudoElement && filter(beforePseudoElement))
+                yield beforePseudoElement;
+
+            let firstChild = currentNode.children?.[0];
+            if (firstChild) {
+                currentBranch.push(firstChild);
+                continue;
+            }
+
+            while (currentBranch.length) {
+                let parent = currentBranch.pop();
+
+                // The `::after` pseudo element is the last child of any node.
+                let parentAfterPseudoElement = parent.afterPseudoElement();
+                if (parentAfterPseudoElement && filter(parentAfterPseudoElement))
+                    yield parentAfterPseudoElement;
+
+                if (parent.nextSibling) {
+                    currentBranch.push(parent.nextSibling);
+                    break;
+                }
+            }
+        }
+    }
+
+    requestDocument(callback)
+    {
+        if (typeof callback !== "function")
+            return this._requestDocumentWithPromise();
+
+        this._requestDocumentWithCallback(callback);
+    }
+
+    ensureDocument()
+    {
+        this.requestDocument(function(){});
+    }
+
+    pushNodeToFrontend(objectId, callback)
+    {
+        let target = WI.assumingMainTarget();
+        this._dispatchWhenDocumentAvailable((callbackWrapper) => {
+            target.DOMAgent.requestNode(objectId, callbackWrapper);
+        }, callback);
+    }
+
+    pushNodeByPathToFrontend(path, callback)
+    {
+        let target = WI.assumingMainTarget();
+        this._dispatchWhenDocumentAvailable((callbackWrapper) => {
+            target.DOMAgent.pushNodeByPathToFrontend(path, callbackWrapper);
+        }, callback);
+    }
+
+    // DOMObserver
+
+    willDestroyDOMNode(nodeId)
+    {
+        let node = this._idToDOMNode[nodeId];
+        node.markDestroyed();
+        delete this._idToDOMNode[nodeId];
+
+        this.dispatchEventToListeners(WI.DOMManager.Event.NodeRemoved, {node});
+    }
+
+    didAddEventListener(nodeId)
+    {
+        let node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node.dispatchEventToListeners(WI.DOMNode.Event.EventListenersChanged);
+    }
+
+    willRemoveEventListener(nodeId)
+    {
+        let node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node.dispatchEventToListeners(WI.DOMNode.Event.EventListenersChanged);
+    }
+
+    didFireEvent(nodeId, eventName, timestamp, data)
+    {
+        let node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node.didFireEvent(eventName, timestamp, data);
+    }
+
+    powerEfficientPlaybackStateChanged(nodeId, timestamp, isPowerEfficient)
+    {
+        let node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node.powerEfficientPlaybackStateChanged(timestamp, isPowerEfficient);
+    }
+
+    // CSSObserver
+
+    nodeLayoutFlagsChanged(nodeId, layoutFlags)
+    {
+        let domNode = this._idToDOMNode[nodeId];
+        console.assert(domNode instanceof WI.DOMNode, domNode, nodeId);
+        if (!domNode)
+            return;
+
+        domNode.layoutFlags = layoutFlags;
+    }
+
+    // Private
+
+    _dispatchWhenDocumentAvailable(func, callback)
+    {
+        var callbackWrapper = DOMManager.wrapClientCallback(callback);
+
+        function onDocumentAvailable()
+        {
+            if (this._document)
+                func(callbackWrapper);
+            else {
+                if (callbackWrapper)
+                    callbackWrapper("No document");
+            }
+        }
+        this.requestDocument(onDocumentAvailable.bind(this));
+    }
+
+    _requestDocumentWithPromise()
+    {
+        if (this._documentPromise)
+            return this._documentPromise.promise;
+
+        this._documentPromise = new WI.WrappedPromise;
+        if (this._document)
+            this._documentPromise.resolve(this._document);
+        else {
+            this._requestDocumentWithCallback((doc) => {
+                this._documentPromise.resolve(doc);
+            });
+        }
+
+        return this._documentPromise.promise;
+    }
+
+    _requestDocumentWithCallback(callback)
+    {
+        if (this._document) {
+            callback(this._document);
+            return;
+        }
+
+        if (this._pendingDocumentRequestCallbacks)
+            this._pendingDocumentRequestCallbacks.push(callback);
+        else
+            this._pendingDocumentRequestCallbacks = [callback];
+
+        if (this._hasRequestedDocument)
+            return;
+
+        if (!WI.pageTarget)
+            return;
+
+        if (!WI.pageTarget.hasDomain("DOM"))
+            return;
+
+        this._hasRequestedDocument = true;
+
+        WI.pageTarget.DOMAgent.getDocument((error, root) => {
+            if (!error)
+                this._setDocument(root);
+
+            for (let callback of this._pendingDocumentRequestCallbacks)
+                callback(this._document);
+
+            this._pendingDocumentRequestCallbacks = null;
+        });
+    }
+
+    _attributeModified(nodeId, name, value)
+    {
+        var node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node._setAttribute(name, value);
+        this.dispatchEventToListeners(WI.DOMManager.Event.AttributeModified, {node, name});
+        node.dispatchEventToListeners(WI.DOMNode.Event.AttributeModified, {name});
+    }
+
+    _attributeRemoved(nodeId, name)
+    {
+        var node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node._removeAttribute(name);
+        this.dispatchEventToListeners(WI.DOMManager.Event.AttributeRemoved, {node, name});
+        node.dispatchEventToListeners(WI.DOMNode.Event.AttributeRemoved, {name});
+    }
+
+    _inlineStyleInvalidated(nodeIds)
+    {
+        for (var nodeId of nodeIds)
+            this._attributeLoadNodeIds[nodeId] = true;
+        if (this._loadNodeAttributesTimeout)
+            return;
+        this._loadNodeAttributesTimeout = setTimeout(this._loadNodeAttributes.bind(this), 0);
+    }
+
+    _loadNodeAttributes()
+    {
+        function callback(nodeId, error, attributes)
+        {
+            if (error) {
+                console.error("Error during DOMAgent operation: " + error);
+                return;
+            }
+            var node = this._idToDOMNode[nodeId];
+            if (node) {
+                node._setAttributesPayload(attributes);
+                this.dispatchEventToListeners(WI.DOMManager.Event.AttributeModified, {node, name: "style"});
+                node.dispatchEventToListeners(WI.DOMNode.Event.AttributeModified, {name: "style"});
+            }
+        }
+
+        this._loadNodeAttributesTimeout = 0;
+
+        let target = WI.assumingMainTarget();
+
+        for (var nodeId in this._attributeLoadNodeIds) {
+            if (!(nodeId in this._idToDOMNode))
+                continue;
+            var nodeIdAsNumber = parseInt(nodeId);
+            target.DOMAgent.getAttributes(nodeIdAsNumber, callback.bind(this, nodeIdAsNumber));
+        }
+        this._attributeLoadNodeIds = {};
+    }
+
+    _characterDataModified(nodeId, newValue)
+    {
+        var node = this._idToDOMNode[nodeId];
+        node._nodeValue = newValue;
+        this.dispatchEventToListeners(WI.DOMManager.Event.CharacterDataModified, {node});
+    }
+
+    nodeForId(nodeId)
+    {
+        return this._idToDOMNode[nodeId] || null;
+    }
+
+    _documentUpdated()
+    {
+        this._setDocument(null);
+    }
+
+    _setDocument(payload)
+    {
+        for (let node of Object.values(this._idToDOMNode))
+            node.markDestroyed();
+
+        this._idToDOMNode = {};
+
+        for (let breakpoint of this._breakpointsForEventListeners.values())
+            WI.domDebuggerManager.dispatchEventToListeners(WI.DOMDebuggerManager.Event.EventBreakpointRemoved, {breakpoint});
+        this._breakpointsForEventListeners.clear();
+
+        let newDocument = null;
+        if (payload && "nodeId" in payload)
+            newDocument = new WI.DOMNode(this, null, false, payload);
+
+        if (this._document === newDocument)
+            return;
+
+        this._document = newDocument;
+
+        // Force the promise to be recreated so that it resolves to the new document.
+        this._documentPromise = null;
+
+        if (!this._document)
+            this._hasRequestedDocument = false;
+
+        this.dispatchEventToListeners(WI.DOMManager.Event.DocumentUpdated, {document: this._document});
+    }
+
+    _setDetachedRoot(payload)
+    {
+        new WI.DOMNode(this, null, false, payload);
+    }
+
+    _setChildNodes(parentId, payloads)
+    {
+        if (!parentId && payloads.length) {
+            this._setDetachedRoot(payloads[0]);
+            return;
+        }
+
+        var parent = this._idToDOMNode[parentId];
+
+        if (parent.children) {
+            for (let node of parent.children)
+                this.dispatchEventToListeners(WI.DOMManager.Event.NodeRemoved, {node, parent});
+        }
+
+        parent._setChildrenPayload(payloads);
+
+        for (let node of parent.children)
+            this.dispatchEventToListeners(WI.DOMManager.Event.NodeInserted, {node, parent});
+    }
+
+    _childNodeCountUpdated(nodeId, newValue)
+    {
+        var node = this._idToDOMNode[nodeId];
+        node.childNodeCount = newValue;
+        this.dispatchEventToListeners(WI.DOMManager.Event.ChildNodeCountUpdated, node);
+    }
+
+    _childNodeInserted(parentId, prevId, payload)
+    {
+        var parent = this._idToDOMNode[parentId];
+        var prev = this._idToDOMNode[prevId];
+        var node = parent._insertChild(prev, payload);
+        this._idToDOMNode[node.id] = node;
+        this.dispatchEventToListeners(WI.DOMManager.Event.NodeInserted, {node, parent});
+    }
+
+    _childNodeRemoved(parentId, nodeId)
+    {
+        var parent = this._idToDOMNode[parentId];
+        var node = this._idToDOMNode[nodeId];
+        parent._removeChild(node);
+        this._unbind(node);
+        this.dispatchEventToListeners(WI.DOMManager.Event.NodeRemoved, {node, parent});
+    }
+
+    _customElementStateChanged(elementId, newState)
+    {
+        const node = this._idToDOMNode[elementId];
+        node._customElementState = newState;
+        this.dispatchEventToListeners(WI.DOMManager.Event.CustomElementStateChanged, {node});
+    }
+
+    _pseudoElementAdded(parentId, pseudoElement)
+    {
+        var parent = this._idToDOMNode[parentId];
+        if (!parent)
+            return;
+
+        var node = new WI.DOMNode(this, parent.ownerDocument, false, pseudoElement);
+        node.parentNode = parent;
+        this._idToDOMNode[node.id] = node;
+        console.assert(!parent.pseudoElements().get(node.pseudoType()));
+        parent.pseudoElements().set(node.pseudoType(), node);
+        this.dispatchEventToListeners(WI.DOMManager.Event.NodeInserted, {node, parent});
+    }
+
+    _pseudoElementRemoved(parentId, pseudoElementId)
+    {
+        var pseudoElement = this._idToDOMNode[pseudoElementId];
+        if (!pseudoElement)
+            return;
+
+        var parent = pseudoElement.parentNode;
+        console.assert(parent);
+        console.assert(parent.id === parentId);
+        if (!parent)
+            return;
+
+        parent._removeChild(pseudoElement);
+        this._unbind(pseudoElement);
+        this.dispatchEventToListeners(WI.DOMManager.Event.NodeRemoved, {node: pseudoElement, parent});
+    }
+
+    _unbind(node)
+    {
+        node.markDestroyed();
+
+        delete this._idToDOMNode[node.id];
+
+        for (let i = 0; node.children && i < node.children.length; ++i)
+            this._unbind(node.children[i]);
+
+        let templateContent = node.templateContent();
+        if (templateContent)
+            this._unbind(templateContent);
+
+        for (let pseudoElement of node.pseudoElements().values())
+            this._unbind(pseudoElement);
+
+        // FIXME: Handle shadow roots.
+    }
+
+    get restoreSelectedNodeIsAllowed()
+    {
+        return this._restoreSelectedNodeIsAllowed;
+    }
+
+    inspectElement(nodeId, options = {})
+    {
+        var node = this._idToDOMNode[nodeId];
+        if (!node || !node.ownerDocument)
+            return;
+
+        // This code path is hit by "Reveal in DOM Tree" and clicking element links/console widgets.
+        // Unless overridden by callers, assume that this is navigation is initiated by a Inspect mode.
+        let initiatorHint = options.initiatorHint || WI.TabBrowser.TabNavigationInitiator.Inspect;
+        this.dispatchEventToListeners(WI.DOMManager.Event.DOMNodeWasInspected, {node, initiatorHint});
+
+        this._inspectModeEnabled = false;
+        this.dispatchEventToListeners(WI.DOMManager.Event.InspectModeStateChanged);
+    }
+
+    inspectNodeObject(remoteObject)
+    {
+        this._restoreSelectedNodeIsAllowed = false;
+
+        function nodeAvailable(nodeId)
+        {
+            remoteObject.release();
+
+            console.assert(nodeId);
+            if (!nodeId)
+                return;
+
+            this.inspectElement(nodeId);
+
+            // Re-resolve the node in the console's object group when adding to the console.
+            let domNode = this.nodeForId(nodeId);
+            WI.RemoteObject.resolveNode(domNode, WI.RuntimeManager.ConsoleObjectGroup).then((remoteObject) => {
+                WI.consoleLogViewController.appendImmediateExecutionWithResult(WI.UIString("Selected Element"), remoteObject, {addSpecialUserLogClass: true});
+            });
+        }
+
+        remoteObject.pushNodeToFrontend(nodeAvailable.bind(this));
+    }
+
+    highlightDOMNodeList(nodes, mode)
+    {
+        if (this._hideDOMNodeHighlightTimeout) {
+            clearTimeout(this._hideDOMNodeHighlightTimeout);
+            this._hideDOMNodeHighlightTimeout = undefined;
+        }
+
+        let nodeIds = [];
+        for (let node of nodes) {
+            console.assert(node instanceof WI.DOMNode, node);
+            console.assert(!node.destroyed, node);
+            if (node.destroyed)
+                continue;
+            nodeIds.push(node.id);
+        }
+
+        let target = WI.assumingMainTarget();
+        target.DOMAgent.highlightNodeList(nodeIds, DOMManager.buildHighlightConfig(mode));
+    }
+
+    highlightSelector(selectorText, frameId, mode)
+    {
+        if (this._hideDOMNodeHighlightTimeout) {
+            clearTimeout(this._hideDOMNodeHighlightTimeout);
+            this._hideDOMNodeHighlightTimeout = undefined;
+        }
+
+        let target = WI.assumingMainTarget();
+        target.DOMAgent.highlightSelector(DOMManager.buildHighlightConfig(mode), selectorText, frameId);
+    }
+
+    highlightRect(rect, usePageCoordinates)
+    {
+        let target = WI.assumingMainTarget();
+        target.DOMAgent.highlightRect.invoke({
+            x: rect.x,
+            y: rect.y,
+            width: rect.width,
+            height: rect.height,
+            color: {r: 111, g: 168, b: 220, a: 0.66},
+            outlineColor: {r: 255, g: 229, b: 153, a: 0.66},
+            usePageCoordinates
+        });
+    }
+
+    hideDOMNodeHighlight()
+    {
+        for (let target of WI.targets) {
+            if (target.hasCommand("DOM.hideHighlight"))
+                target.DOMAgent.hideHighlight();
+        }
+    }
+
+    highlightDOMNodeForTwoSeconds(nodeId)
+    {
+        let node = this._idToDOMNode[nodeId];
+        if (!node)
+            return;
+
+        node.highlight();
+
+        this._hideDOMNodeHighlightTimeout = setTimeout(this.hideDOMNodeHighlight.bind(this), 2000);
+    }
+
+    get inspectModeEnabled()
+    {
+        return this._inspectModeEnabled;
+    }
+
+    set inspectModeEnabled(enabled)
+    {
+        if (enabled === this._inspectModeEnabled)
+            return;
+
+        let target = WI.assumingMainTarget();
+        let commandArguments = {
+            enabled,
+            highlightConfig: DOMManager.buildHighlightConfig(),
+            showRulers: WI.settings.showRulersDuringElementSelection.value,
+        };
+        target.DOMAgent.setInspectModeEnabled.invoke(commandArguments, (error) => {
+            if (error) {
+                WI.reportInternalError(error);
+                return;
+            }
+
+            this._inspectModeEnabled = enabled;
+            this.dispatchEventToListeners(WI.DOMManager.Event.InspectModeStateChanged);
+        });
+    }
+
+    setInspectedNode(node)
+    {
+        console.assert(node instanceof WI.DOMNode);
+        if (node === this._inspectedNode)
+            return;
+
+        console.assert(!node.destroyed, node);
+        if (node.destroyed)
+            return;
+
+        let callback = (error) => {
+            console.assert(!error, error);
+            if (error)
+                return;
+
+            let lastInspectedNode = this._inspectedNode;
+            this._inspectedNode = node;
+
+            this.dispatchEventToListeners(WI.DOMManager.Event.InspectedNodeChanged, {lastInspectedNode});
+        };
+
+        let target = WI.assumingMainTarget();
+        target.DOMAgent.setInspectedNode(node.id, callback);
+    }
+
+    getSupportedEventNames(callback)
+    {
+        let target = WI.assumingMainTarget();
+        if (!target.hasCommand("DOM.getSupportedEventNames"))
+            return Promise.resolve(new Set);
+
+        if (!this._getSupportedEventNamesPromise) {
+            this._getSupportedEventNamesPromise = target.DOMAgent.getSupportedEventNames()
+            .then(({eventNames}) => new Set(eventNames));
+        }
+
+        return this._getSupportedEventNamesPromise;
+    }
+
+    setEventListenerDisabled(eventListener, disabled)
+    {
+        let target = WI.assumingMainTarget();
+        target.DOMAgent.setEventListenerDisabled(eventListener.eventListenerId, disabled);
+    }
+
+    setBreakpointForEventListener(eventListener)
+    {
+        let breakpoint = this._breakpointsForEventListeners.get(eventListener.eventListenerId);
+        if (breakpoint) {
+            console.assert(breakpoint.disabled);
+            breakpoint.disabled = false;
+            return;
+        }
+
+        breakpoint = new WI.EventBreakpoint(WI.EventBreakpoint.Type.Listener, {eventName: eventListener.type, eventListener});
+        console.assert(!breakpoint.disabled);
+
+        this._breakpointsForEventListeners.set(eventListener.eventListenerId, breakpoint);
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("DOM"))
+                this._setEventBreakpoint(breakpoint, target);
+        }
+
+        WI.debuggerManager.addProbesForBreakpoint(breakpoint);
+
+        WI.domDebuggerManager.dispatchEventToListeners(WI.DOMDebuggerManager.Event.EventBreakpointAdded, {breakpoint});
+    }
+
+    removeBreakpointForEventListener(eventListener)
+    {
+        let breakpoint = this._breakpointsForEventListeners.take(eventListener.eventListenerId);
+        if (!breakpoint)
+            return;
+
+        // Disable the breakpoint first, so removing actions doesn't re-add the breakpoint.
+        breakpoint.disabled = true;
+        breakpoint.clearActions();
+
+        WI.debuggerManager.removeProbesForBreakpoint(breakpoint);
+
+        WI.domDebuggerManager.dispatchEventToListeners(WI.DOMDebuggerManager.Event.EventBreakpointRemoved, {breakpoint});
+    }
+
+    removeEventListenerBreakpointsForNode(domNode)
+    {
+        for (let breakpoint of Array.from(this._breakpointsForEventListeners.values())) {
+            let eventListener = breakpoint.eventListener;
+            if (eventListener.nodeId === domNode.id)
+                this.removeBreakpointForEventListener(eventListener);
+        }
+    }
+
+    breakpointForEventListenerId(eventListenerId)
+    {
+        return this._breakpointsForEventListeners.get(eventListenerId) || null;
+    }
+
+    // Private
+
+    _setEventBreakpoint(breakpoint, target)
+    {
+        console.assert(!breakpoint.disabled, breakpoint);
+
+        let eventListener = breakpoint.eventListener;
+        console.assert(eventListener);
+
+            if (!WI.debuggerManager.breakpointsDisabledTemporarily)
+                WI.debuggerManager.breakpointsEnabled = true;
+
+        target.DOMAgent.setBreakpointForEventListener.invoke({
+            eventListenerId: eventListener.eventListenerId,
+            options: breakpoint.optionsToProtocol(),
+        });
+    }
+
+    _removeEventBreakpoint(breakpoint, target)
+    {
+        let eventListener = breakpoint.eventListener;
+        console.assert(eventListener);
+
+        target.DOMAgent.removeBreakpointForEventListener(eventListener.eventListenerId);
+    }
+
+    _handleEventBreakpointDisabledStateChanged(event)
+    {
+        let breakpoint = event.target;
+
+        // Non-specific event listener breakpoints are handled by `DOMDebuggerManager`.
+        if (!breakpoint.eventListener)
+            return;
+
+        for (let target of WI.targets) {
+            if (!target.hasDomain("DOM"))
+                continue;
+
+            if (breakpoint.disabled)
+                this._removeEventBreakpoint(breakpoint, target);
+            else
+                this._setEventBreakpoint(breakpoint, target);
+        }
+    }
+
+    _handleEventBreakpointEditablePropertyChanged(event)
+    {
+        let breakpoint = event.target;
+
+        // Non-specific event listener breakpoints are handled by `DOMDebuggerManager`.
+        if (!breakpoint.eventListener)
+            return;
+
+        if (breakpoint.disabled)
+            return;
+
+        for (let target of WI.targets) {
+            // Clear the old breakpoint from the backend before setting the new one.
+            this._removeEventBreakpoint(breakpoint, target);
+            this._setEventBreakpoint(breakpoint, target);
+        }
+    }
+
+    _handleEventBreakpointActionsChanged(event)
+    {
+        let breakpoint = event.target;
+
+        // Non-specific event listener breakpoints are handled by `DOMDebuggerManager`.
+        if (!breakpoint.eventListener)
+            return;
+
+        this._handleEventBreakpointEditablePropertyChanged(event);
+
+        WI.debuggerManager.updateProbesForBreakpoint(breakpoint);
+    }
+
+    _mainResourceDidChange(event)
+    {
+        if (!event.target.isMainFrame())
+            return;
+
+        this._restoreSelectedNodeIsAllowed = true;
+
+        this.ensureDocument();
+
+        WI.DOMNode.resetDefaultLayoutOverlayConfiguration();
+    }
+};
+
+WI.DOMManager.Event = {
+    AttributeModified: "dom-manager-attribute-modified",
+    AttributeRemoved: "dom-manager-attribute-removed",
+    CharacterDataModified: "dom-manager-character-data-modified",
+    NodeInserted: "dom-manager-node-inserted",
+    NodeRemoved: "dom-manager-node-removed",
+    CustomElementStateChanged: "dom-manager-custom-element-state-changed",
+    DocumentUpdated: "dom-manager-document-updated",
+    ChildNodeCountUpdated: "dom-manager-child-node-count-updated",
+    DOMNodeWasInspected: "dom-manager-dom-node-was-inspected",
+    InspectModeStateChanged: "dom-manager-inspect-mode-state-changed",
+    InspectedNodeChanged: "dom-manager-inspected-node-changed",
+};

inspector/Controllers/DOMStorageManager.js

@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2013 Samsung Electronics. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: DOMStorageManager lacks advanced multi-target support. (DOMStorage per-target)
+
+WI.DOMStorageManager = class DOMStorageManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+        this._reset();
+    }
+
+    // Agent
+
+    get domains() { return ["DOMStorage"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "DOMStorage");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("DOMStorage"))
+            target.DOMStorageAgent.enable();
+    }
+
+    // Public
+
+    get domStorageObjects() { return this._domStorageObjects; }
+
+    get cookieStorageObjects()
+    {
+        var cookieStorageObjects = [];
+        for (var host in this._cookieStorageObjects)
+            cookieStorageObjects.push(this._cookieStorageObjects[host]);
+        return cookieStorageObjects;
+    }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        this._reset();
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.addEventListener(WI.Frame.Event.SecurityOriginDidChange, this._securityOriginDidChange, this);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        this._enabled = false;
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("DOMStorage"))
+                target.DOMStorageAgent.disable();
+        }
+
+        WI.Frame.removeEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.removeEventListener(WI.Frame.Event.SecurityOriginDidChange, this._securityOriginDidChange, this);
+
+        this._reset();
+    }
+
+    // DOMStorageObserver
+
+    itemsCleared(storageId)
+    {
+        console.assert(this._enabled);
+
+        let domStorage = this._domStorageForIdentifier(storageId);
+        if (domStorage)
+            domStorage.itemsCleared(storageId);
+    }
+
+    itemRemoved(storageId, key)
+    {
+        console.assert(this._enabled);
+
+        let domStorage = this._domStorageForIdentifier(storageId);
+        if (domStorage)
+            domStorage.itemRemoved(key);
+    }
+
+    itemAdded(storageId, key, value)
+    {
+        console.assert(this._enabled);
+
+        let domStorage = this._domStorageForIdentifier(storageId);
+        if (domStorage)
+            domStorage.itemAdded(key, value);
+    }
+
+    itemUpdated(storageId, key, oldValue, newValue)
+    {
+        console.assert(this._enabled);
+
+        let domStorage = this._domStorageForIdentifier(storageId);
+        if (domStorage)
+            domStorage.itemUpdated(key, oldValue, newValue);
+    }
+
+    // InspectorObserver
+
+    inspectDOMStorage(id)
+    {
+        console.assert(this._enabled);
+
+        var domStorage = this._domStorageForIdentifier(id);
+        console.assert(domStorage);
+        if (!domStorage)
+            return;
+        this.dispatchEventToListeners(WI.DOMStorageManager.Event.DOMStorageObjectWasInspected, {domStorage});
+    }
+
+    // Private
+
+    _reset()
+    {
+        this._domStorageObjects = [];
+        this._cookieStorageObjects = {};
+
+        this.dispatchEventToListeners(DOMStorageManager.Event.Cleared);
+
+        let mainFrame = WI.networkManager.mainFrame;
+        if (mainFrame) {
+            this._addDOMStorageIfNeeded(mainFrame);
+            this._addCookieStorageIfNeeded(mainFrame);
+        }
+    }
+
+    _domStorageForIdentifier(id)
+    {
+        for (var storageObject of this._domStorageObjects) {
+            // The id is an object, so we need to compare the properties using Object.shallowEqual.
+            if (Object.shallowEqual(storageObject.id, id))
+                return storageObject;
+        }
+
+        return null;
+    }
+
+    _addDOMStorageIfNeeded(frame)
+    {
+        if (!this._enabled)
+            return;
+
+        if (!InspectorBackend.hasDomain("DOMStorage"))
+            return;
+
+        // Don't show storage if we don't have a security origin (about:blank).
+        if (!frame.securityOrigin || frame.securityOrigin === "://")
+            return;
+
+        // FIXME: Consider passing the other parts of the origin along.
+
+        let addDOMStorage = (isLocalStorage) => {
+            let identifier = {securityOrigin: frame.securityOrigin, isLocalStorage};
+            if (this._domStorageForIdentifier(identifier))
+                return;
+
+            let domStorage = new WI.DOMStorageObject(identifier, frame.mainResource.urlComponents.host, identifier.isLocalStorage);
+            this._domStorageObjects.push(domStorage);
+            this.dispatchEventToListeners(DOMStorageManager.Event.DOMStorageObjectWasAdded, {domStorage});
+        };
+        addDOMStorage(true);
+        addDOMStorage(false);
+    }
+
+    _addCookieStorageIfNeeded(frame)
+    {
+        if (!this._enabled)
+            return;
+
+        if (!InspectorBackend.hasCommand("Page.getCookies"))
+            return;
+
+        // Add the host of the frame that changed the main resource to the list of hosts there could be cookies for.
+        let host = parseURL(frame.url).host;
+        if (!host)
+            return;
+
+        if (this._cookieStorageObjects[host])
+            return;
+
+        this._cookieStorageObjects[host] = new WI.CookieStorageObject(host);
+        this.dispatchEventToListeners(WI.DOMStorageManager.Event.CookieStorageObjectWasAdded, {cookieStorage: this._cookieStorageObjects[host]});
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (event.target.isMainFrame()) {
+            this._reset();
+            return;
+        }
+
+        this._addCookieStorageIfNeeded(event.target);
+    }
+
+    _securityOriginDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        this._addDOMStorageIfNeeded(event.target);
+    }
+};
+
+WI.DOMStorageManager.Event = {
+    CookieStorageObjectWasAdded: "dom-storage-manager-cookie-storage-object-was-added",
+    DOMStorageObjectWasAdded: "dom-storage-manager-dom-storage-object-was-added",
+    DOMStorageObjectWasInspected: "dom-storage-manager-dom-storage-object-was-inspected",
+    Cleared: "dom-storage-manager-cleared",
+};

inspector/Controllers/DatabaseManager.js

@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2013 Samsung Electronics. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: DatabaseManager lacks advanced multi-target support. (DataBase per-target)
+
+WI.DatabaseManager = class DatabaseManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+        this._reset();
+    }
+
+    // Agent
+
+    get domains() { return ["Database"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "Database");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("Database"))
+            target.DatabaseAgent.enable();
+    }
+
+    // Public
+
+    get databases() { return this._databaseObjects; }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        this._reset();
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        this._enabled = false;
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("Database"))
+                target.DatabaseAgent.disable();
+        }
+
+        WI.Frame.removeEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+
+        this._reset();
+    }
+
+    // DatabaseObserver
+
+    databaseWasAdded(id, host, name, version)
+    {
+        console.assert(this._enabled);
+
+        var database = new WI.DatabaseObject(id, host, name, version);
+
+        this._databaseObjects.push(database);
+        this.dispatchEventToListeners(WI.DatabaseManager.Event.DatabaseWasAdded, {database});
+    }
+
+    // InspectorObserver
+
+    inspectDatabase(id)
+    {
+        console.assert(this._enabled);
+
+        var database = this._databaseForIdentifier(id);
+        console.assert(database);
+        if (!database)
+            return;
+        this.dispatchEventToListeners(WI.DatabaseManager.Event.DatabaseWasInspected, {database});
+    }
+
+    // Private
+
+    _reset()
+    {
+        this._databaseObjects = [];
+
+        this.dispatchEventToListeners(WI.DatabaseManager.Event.Cleared);
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (event.target.isMainFrame())
+            this._reset();
+    }
+
+    _databaseForIdentifier(id)
+    {
+        for (var i = 0; i < this._databaseObjects.length; ++i) {
+            if (this._databaseObjects[i].id === id)
+                return this._databaseObjects[i];
+        }
+
+        return null;
+    }
+};
+
+WI.DatabaseManager.Event = {
+    DatabaseWasAdded: "database-manager-database-was-added",
+    DatabaseWasInspected: "database-manager-database-was-inspected",
+    Cleared: "database-manager-cleared",
+};

inspector/Controllers/DiagnosticController.js

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.DiagnosticController = class DiagnosticController
+{
+    constructor()
+    {
+        this._diagnosticLoggingAvailable = false;
+        this._recorders = new Set;
+
+        this._autoLogDiagnosticEventsToConsole = WI.settings.debugAutoLogDiagnosticEvents.value;
+        this._logToConsoleMethod = window.InspectorTest ? InspectorTest.log.bind(InspectorTest) : console.log;
+
+        WI.settings.debugEnableDiagnosticLogging.addEventListener(WI.Setting.Event.Changed, this._debugEnableDiagnosticLoggingSettingDidChange, this);
+        WI.settings.debugAutoLogDiagnosticEvents.addEventListener(WI.Setting.Event.Changed, this._debugAutoLogDiagnosticEventsSettingDidChange, this);
+    }
+
+    // Public
+
+    get diagnosticLoggingAvailable()
+    {
+        return this._diagnosticLoggingAvailable;
+    }
+
+    set diagnosticLoggingAvailable(available)
+    {
+        if (this._diagnosticLoggingAvailable === available)
+            return;
+
+        this._diagnosticLoggingAvailable = available;
+        this._updateRecorderStates();
+    }
+
+    addRecorder(recorder)
+    {
+        console.assert(!this._recorders.has(recorder), "Tried to add the same diagnostic recorder more than once.");
+        this._recorders.add(recorder);
+        this._updateRecorderStates();
+    }
+
+    logDiagnosticEvent(eventName, payload)
+    {
+        // Don't rely on a diagnostic logging delegate to unit test frontend diagnostics code.
+        if (window.InspectorTest) {
+            this._logToConsoleMethod(`Received diagnostic event: ${eventName} => ${JSON.stringify(payload)}`);
+            return;
+        }
+
+        if (this._autoLogDiagnosticEventsToConsole)
+            this._logToConsoleMethod(eventName, payload);
+
+        InspectorFrontendHost.logDiagnosticEvent(eventName, JSON.stringify(payload));
+    }
+
+    // Private
+
+    _debugEnableDiagnosticLoggingSettingDidChange()
+    {
+        this._updateRecorderStates();
+    }
+
+    _debugAutoLogDiagnosticEventsSettingDidChange()
+    {
+        this._autoLogDiagnosticEventsToConsole = WI.settings.debugAutoLogDiagnosticEvents.value;
+    }
+
+    _updateRecorderStates()
+    {
+        let isActive = this._diagnosticLoggingAvailable && WI.settings.debugEnableDiagnosticLogging.value;
+        for (let recorder of this._recorders)
+            recorder.active = isActive;
+    }
+};

inspector/Controllers/DiagnosticEventRecorder.js

@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.DiagnosticEventRecorder = class DiagnosticEventRecorder
+{
+    constructor(name, controller)
+    {
+        console.assert(controller instanceof WI.DiagnosticController, controller);
+
+        this._name = name;
+        this._active = false;
+        this._controller = controller;
+    }
+
+    // Public
+
+    get name() { return this._name; }
+
+    get active()
+    {
+        return this._active;
+    }
+
+    set active(value)
+    {
+        if (this._active === value)
+            return;
+
+        this._active = value;
+
+        if (this._active)
+            this.setup();
+        else
+            this.teardown();
+    }
+
+    // Protected
+
+    logDiagnosticEvent(eventName, payload)
+    {
+        if (this._active)
+            this._controller.logDiagnosticEvent(eventName, payload);
+    }
+
+    setup()
+    {
+        throw WI.NotImplementedError.subclassMustOverride();
+    }
+
+    teardown()
+    {
+        throw WI.NotImplementedError.subclassMustOverride();
+    }
+};

inspector/Controllers/DragToAdjustController.js

@@ -0,0 +1,238 @@
+/*
+ * Copyright (C) 2014 Antoine Quint
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.DragToAdjustController = class DragToAdjustController
+{
+    constructor(delegate)
+    {
+        this._delegate = delegate;
+
+        this._element = null;
+        this._active = false;
+        this._enabled = false;
+        this._dragging = false;
+        this._tracksMouseClickAndDrag = false;
+    }
+
+    // Public
+
+    get element()
+    {
+        return this._element;
+    }
+
+    set element(element)
+    {
+        this._element = element;
+    }
+
+    get enabled()
+    {
+        return this._enabled;
+    }
+
+    set enabled(enabled)
+    {
+        if (this._enabled === enabled)
+            return;
+
+        if (enabled) {
+            this._element.addEventListener("mouseenter", this);
+            this._element.addEventListener("mouseleave", this);
+        } else {
+            this._element.removeEventListener("mouseenter", this);
+            this._element.removeEventListener("mouseleave", this);
+        }
+    }
+
+    get active()
+    {
+        return this._active;
+    }
+
+    set active(active)
+    {
+        if (!this._element)
+            return;
+
+        if (this._active === active)
+            return;
+
+        if (active) {
+            WI.notifications.addEventListener(WI.Notification.GlobalModifierKeysDidChange, this._modifiersDidChange, this);
+            this._element.addEventListener("mousemove", this);
+        } else {
+            WI.notifications.removeEventListener(WI.Notification.GlobalModifierKeysDidChange, this._modifiersDidChange, this);
+            this._element.removeEventListener("mousemove", this);
+            this._setTracksMouseClickAndDrag(false);
+        }
+
+        this._active = active;
+
+        if (this._delegate && typeof this._delegate.dragToAdjustControllerActiveStateChanged === "function")
+            this._delegate.dragToAdjustControllerActiveStateChanged(this);
+    }
+
+    reset()
+    {
+        this._setTracksMouseClickAndDrag(false);
+        this._element.classList.remove(WI.DragToAdjustController.StyleClassName);
+
+        if (this._delegate && typeof this._delegate.dragToAdjustControllerDidReset === "function")
+            this._delegate.dragToAdjustControllerDidReset(this);
+    }
+
+    // Protected
+
+    handleEvent(event)
+    {
+        switch (event.type) {
+        case "mouseenter":
+            if (!this._dragging) {
+                if (this._delegate && typeof this._delegate.dragToAdjustControllerCanBeActivated === "function")
+                    this.active = this._delegate.dragToAdjustControllerCanBeActivated(this);
+                else
+                    this.active = true;
+            }
+            break;
+        case "mouseleave":
+            if (!this._dragging)
+                this.active = false;
+            break;
+        case "mousemove":
+            if (this._dragging)
+                this._mouseWasDragged(event);
+            else
+                this._mouseMoved(event);
+            break;
+        case "mousedown":
+            this._mouseWasPressed(event);
+            break;
+        case "mouseup":
+            this._mouseWasReleased(event);
+            break;
+        case "contextmenu":
+            event.preventDefault();
+            break;
+        }
+    }
+
+    // Private
+
+    _setDragging(dragging)
+    {
+        if (this._dragging === dragging)
+            return;
+
+        console.assert(window.event);
+        if (dragging)
+            WI.elementDragStart(this._element, this, this, window.event, "col-resize", window);
+        else
+            WI.elementDragEnd(window.event);
+
+        this._dragging = dragging;
+    }
+
+    _setTracksMouseClickAndDrag(tracksMouseClickAndDrag)
+    {
+        if (this._tracksMouseClickAndDrag === tracksMouseClickAndDrag)
+            return;
+
+        if (tracksMouseClickAndDrag) {
+            this._element.classList.add(WI.DragToAdjustController.StyleClassName);
+            window.addEventListener("mousedown", this, true);
+            window.addEventListener("contextmenu", this, true);
+        } else {
+            this._element.classList.remove(WI.DragToAdjustController.StyleClassName);
+            window.removeEventListener("mousedown", this, true);
+            window.removeEventListener("contextmenu", this, true);
+            this._setDragging(false);
+        }
+
+        this._tracksMouseClickAndDrag = tracksMouseClickAndDrag;
+    }
+
+    _modifiersDidChange(event)
+    {
+        var canBeAdjusted = WI.modifierKeys.altKey;
+        if (canBeAdjusted && this._delegate && typeof this._delegate.dragToAdjustControllerCanBeAdjusted === "function")
+            canBeAdjusted = this._delegate.dragToAdjustControllerCanBeAdjusted(this);
+
+        this._setTracksMouseClickAndDrag(canBeAdjusted);
+    }
+
+    _mouseMoved(event)
+    {
+        var canBeAdjusted = event.altKey;
+        if (canBeAdjusted && this._delegate && typeof this._delegate.dragToAdjustControllerCanAdjustObjectAtPoint === "function")
+            canBeAdjusted = this._delegate.dragToAdjustControllerCanAdjustObjectAtPoint(this, WI.Point.fromEvent(event));
+
+        this._setTracksMouseClickAndDrag(canBeAdjusted);
+    }
+
+    _mouseWasPressed(event)
+    {
+        this._lastX = event.screenX;
+
+        this._setDragging(true);
+
+        event.preventDefault();
+        event.stopPropagation();
+    }
+
+    _mouseWasDragged(event)
+    {
+        var x = event.screenX;
+        var amount = x - this._lastX;
+
+        if (Math.abs(amount) < 1)
+            return;
+
+        this._lastX = x;
+
+        if (event.ctrlKey)
+            amount /= 10;
+        else if (event.shiftKey)
+            amount *= 10;
+
+        if (this._delegate && typeof this._delegate.dragToAdjustControllerWasAdjustedByAmount === "function")
+            this._delegate.dragToAdjustControllerWasAdjustedByAmount(this, amount);
+
+        event.preventDefault();
+        event.stopPropagation();
+    }
+
+    _mouseWasReleased(event)
+    {
+        this._setDragging(false);
+
+        event.preventDefault();
+        event.stopPropagation();
+
+        this.reset();
+    }
+};
+
+WI.DragToAdjustController.StyleClassName = "drag-to-adjust";

inspector/Controllers/ExtensionTabActivationDiagnosticEventRecorder.js

@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ExtensionTabActivationDiagnosticEventRecorder = class ExtensionTabActivationDiagnosticEventRecorder extends WI.DiagnosticEventRecorder
+{
+    constructor(controller)
+    {
+        super("ExtensionTabActivation", controller);
+
+        this._reportedExtensionTabIDs = new Set;
+    }
+
+    // Protected
+
+    setup()
+    {
+        WI.tabBrowser.addEventListener(WI.TabBrowser.Event.SelectedTabContentViewDidChange, this._selectedTabContentViewDidChange, this);
+    }
+
+    teardown()
+    {
+        WI.tabBrowser.removeEventListener(WI.TabBrowser.Event.SelectedTabContentViewDidChange, this._selectedTabContentViewDidChange, this);
+    }
+
+    // Private
+
+    _selectedTabContentViewDidChange(event)
+    {
+        let selectedTab = event.data.incomingTab;
+        if (!(selectedTab instanceof WI.WebInspectorExtensionTabContentView))
+            return;
+
+        let extension = selectedTab.extension;
+        console.assert(extension instanceof WI.WebInspectorExtension, "Extension tab should have an associated extension.");
+
+        // Only report the first selection of an extension tab.
+        if (this._reportedExtensionTabIDs.has(selectedTab.extensionTabID))
+            return;
+
+        this._reportedExtensionTabIDs.add(selectedTab.extensionTabID);
+
+        this.logDiagnosticEvent(this.name, {
+            extensionBundleIdentifier: extension.extensionBundleIdentifier,
+            extensionTabName: selectedTab.tabInfo().displayName,
+            activeExtensionTabCount: WI.sharedApp.extensionController.activeExtensionTabContentViews().length,
+        });
+    }
+};
+

inspector/Controllers/Formatter.js

@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.Formatter = class Formatter
+{
+    constructor(codeMirror, builder)
+    {
+        console.assert(codeMirror);
+        console.assert(builder);
+
+        this._codeMirror = codeMirror;
+        this._builder = builder;
+
+        this._lastToken = null;
+        this._lastContent = "";
+    }
+
+    // Public
+
+    format(from, to)
+    {
+        console.assert(this._builder.originalContent === null);
+        if (this._builder.originalContent !== null)
+            return;
+
+        var outerMode = this._codeMirror.getMode();
+        var content = this._codeMirror.getRange(from, to);
+        var state = CodeMirror.copyState(outerMode, this._codeMirror.getTokenAt(from).state);
+        this._builder.setOriginalContent(content);
+
+        var lineOffset = 0;
+        var lines = content.split("\n");
+        for (var i = 0; i < lines.length; ++i) {
+            var line = lines[i];
+            var startOfNewLine = true;
+            var firstTokenOnLine = true;
+            var stream = new CodeMirror.StringStream(line);
+            while (!stream.eol()) {
+                var innerMode = CodeMirror.innerMode(outerMode, state);
+                var token = outerMode.token(stream, state);
+                var isWhiteSpace = token === null && /^\s*$/.test(stream.current());
+                this._handleToken(innerMode.mode, token, state, stream, lineOffset + stream.start, isWhiteSpace, startOfNewLine, firstTokenOnLine);
+                stream.start = stream.pos;
+                startOfNewLine = false;
+                if (firstTokenOnLine && !isWhiteSpace)
+                    firstTokenOnLine = false;
+            }
+
+            if (firstTokenOnLine)
+                this._handleEmptyLine();
+
+            lineOffset += line.length + 1; // +1 for the "\n" removed in split.
+            this._handleLineEnding(lineOffset - 1); // -1 for the index of the "\n".
+        }
+
+        this._builder.finish();
+    }
+
+    // Private
+
+    _handleToken(mode, token, state, stream, originalPosition, isWhiteSpace, startOfNewLine, firstTokenOnLine)
+    {
+        // String content of the token.
+        var content = stream.current();
+
+        // Start of a new line. Insert a newline to be safe if code was not-ASI safe. These are collapsed.
+        if (startOfNewLine)
+            this._builder.appendNewline();
+
+        // Whitespace. Remove all spaces or collapse to a single space.
+        if (isWhiteSpace) {
+            this._builder.appendSpace();
+            return;
+        }
+
+        // Avoid some hooks for content in comments.
+        var isComment = token && /\bcomment\b/.test(token);
+
+        if (mode.modifyStateForTokenPre)
+            mode.modifyStateForTokenPre(this._lastToken, this._lastContent, token, state, content, isComment);
+
+        // Should we remove the last whitespace?
+        if (this._builder.lastTokenWasWhitespace && mode.removeLastWhitespace(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.removeLastWhitespace();
+
+        // Should we remove the last newline?
+        if (this._builder.lastTokenWasNewline && mode.removeLastNewline(this._lastToken, this._lastContent, token, state, content, isComment, firstTokenOnLine))
+            this._builder.removeLastNewline();
+
+        // Add whitespace after the last token?
+        if (!this._builder.lastTokenWasWhitespace && mode.shouldHaveSpaceAfterLastToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendSpace();
+
+        // Add whitespace before this token?
+        if (!this._builder.lastTokenWasWhitespace && mode.shouldHaveSpaceBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendSpace();
+
+        // Should we dedent before this token?
+        var dedents = mode.dedentsBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment);
+        while (dedents-- > 0)
+            this._builder.dedent();
+
+        // Should we add a newline before this token?
+        if (mode.newlineBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.appendNewline();
+
+        // Should we indent before this token?
+        if (mode.indentBeforeToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.indent();
+
+        // Append token.
+        this._builder.appendToken(content, originalPosition);
+
+        // Let the pretty printer update any state it keeps track of.
+        if (mode.modifyStateForTokenPost)
+            mode.modifyStateForTokenPost(this._lastToken, this._lastContent, token, state, content, isComment);
+
+        // Should we indent or dedent after this token?
+        if (!isComment && mode.indentAfterToken(this._lastToken, this._lastContent, token, state, content, isComment))
+            this._builder.indent();
+
+        // Should we add newlines after this token?
+        var newlines = mode.newlinesAfterToken(this._lastToken, this._lastContent, token, state, content, isComment);
+        if (newlines)
+            this._builder.appendMultipleNewlines(newlines);
+
+        // Record this token as the last token.
+        this._lastToken = token;
+        this._lastContent = content;
+    }
+
+    _handleEmptyLine()
+    {
+        // Preserve original whitespace only lines by adding a newline.
+        // However, don't do this if the builder just added multiple newlines.
+        if (!(this._builder.lastTokenWasNewline && this._builder.lastNewlineAppendWasMultiple))
+            this._builder.appendNewline(true);
+    }
+
+    _handleLineEnding(originalNewLinePosition)
+    {
+        // Record the original line ending.
+        this._builder.addOriginalLineEnding(originalNewLinePosition);
+    }
+};

inspector/Controllers/FormatterSourceMap.js

@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.FormatterSourceMap = class FormatterSourceMap extends WI.Object
+{
+    constructor(originalLineEndings, formattedLineEndings, mapping)
+    {
+        super();
+
+        this._originalLineEndings = originalLineEndings;
+        this._formattedLineEndings = formattedLineEndings;
+        this._mapping = mapping;
+    }
+
+    // Static
+
+    static fromSourceMapData({originalLineEndings, formattedLineEndings, mapping})
+    {
+        return new WI.FormatterSourceMap(originalLineEndings, formattedLineEndings, mapping);
+    }
+
+    // Public
+
+    originalToFormatted(lineNumber, columnNumber)
+    {
+        var originalPosition = this._locationToPosition(this._originalLineEndings, lineNumber || 0, columnNumber || 0);
+        return this.originalPositionToFormatted(originalPosition);
+    }
+
+    originalPositionToFormatted(originalPosition)
+    {
+        var formattedPosition = this._convertPosition(this._mapping.original, this._mapping.formatted, originalPosition);
+        return this._positionToLocation(this._formattedLineEndings, formattedPosition);
+    }
+
+    originalPositionToFormattedPosition(originalPosition)
+    {
+        return this._convertPosition(this._mapping.original, this._mapping.formatted, originalPosition);
+    }
+
+    formattedToOriginal(lineNumber, columnNumber)
+    {
+        var originalPosition = this.formattedToOriginalOffset(lineNumber, columnNumber);
+        return this._positionToLocation(this._originalLineEndings, originalPosition);
+    }
+
+    formattedToOriginalOffset(lineNumber, columnNumber)
+    {
+        var formattedPosition = this._locationToPosition(this._formattedLineEndings, lineNumber || 0, columnNumber || 0);
+        var originalPosition = this._convertPosition(this._mapping.formatted, this._mapping.original, formattedPosition);
+        return originalPosition;
+    }
+
+    formattedPositionToOriginalPosition(formattedPosition)
+    {
+        return this._convertPosition(this._mapping.formatted, this._mapping.original, formattedPosition);
+    }
+
+    // Private
+
+    _locationToPosition(lineEndings, lineNumber, columnNumber)
+    {
+        var lineOffset = lineNumber ? lineEndings[lineNumber - 1] + 1 : 0;
+        return lineOffset + columnNumber;
+    }
+
+    _positionToLocation(lineEndings, position)
+    {
+        var lineNumber = lineEndings.upperBound(position - 1);
+        if (!lineNumber)
+            var columnNumber = position;
+        else
+            var columnNumber = position - lineEndings[lineNumber - 1] - 1;
+        return {lineNumber, columnNumber};
+    }
+
+    _convertPosition(positions1, positions2, positionInPosition1)
+    {
+        var index = positions1.upperBound(positionInPosition1) - 1;
+        var convertedPosition = positions2[index] + positionInPosition1 - positions1[index];
+        if (index < positions2.length - 1 && convertedPosition > positions2[index + 1])
+            convertedPosition = positions2[index + 1];
+        return convertedPosition;
+    }
+};

inspector/Controllers/GestureController.js

@@ -0,0 +1,245 @@
+/*
+ * Copyright (C) 2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.GestureController = class GestureController
+{
+    constructor(target, delegate, {container, supportsScale, supportsTranslate})
+    {
+        console.assert(target instanceof Node, target);
+        console.assert(!container || container instanceof Node, container);
+        console.assert(!supportsScale || typeof delegate.gestureControllerDidScale === "function", delegate.gestureControllerDidScale);
+        console.assert(!supportsTranslate || typeof delegate.gestureControllerDidTranslate === "function", delegate.gestureControllerDidTranslate);
+        console.assert(supportsScale || supportsTranslate, "expects at least one gesture");
+
+        this._target = target;
+        this._delegate = delegate;
+
+        this._scale = 1;
+        this._translate = {x: 0, y: 0};
+
+        this._mouseWheelDelta = 0;
+
+        container ||= target;
+
+        this._supportsScale = supportsScale || false;
+        if (this._supportsScale) {
+            container.addEventListener("wheel", this._handleWheel.bind(this));
+            container.addEventListener("gesturestart", this._handleGestureStart.bind(this));
+            container.addEventListener("gesturechange", this._handleGestureChange.bind(this));
+            container.addEventListener("gestureend", this._handleGestureEnd.bind(this));
+        }
+
+        this._supportsTranslate = supportsTranslate || false;
+        if (this._supportsTranslate) {
+            console.assert(!container.draggable, "cannot have both a translate gesture and dragging");
+            container.addEventListener("mousedown", this._handleMouseDown.bind(this));
+        }
+    }
+
+    // Public
+
+    get scale()
+    {
+        return this._scale;
+    }
+
+    set scale(scale)
+    {
+        console.assert(this._supportsScale);
+
+        scale = Number.constrain(scale, 0.01, 100);
+        if (scale === this._scale)
+            return;
+
+        this._scale = scale;
+
+        this._delegate.gestureControllerDidScale(this);
+    }
+
+    get translate()
+    {
+        return this._translate;
+    }
+
+    set translate(translate)
+    {
+        console.assert(this._supportsTranslate);
+
+        if (translate.x === this._translate.x && translate.y === this._translate.y)
+            return;
+
+        this._translate = translate;
+
+        this._delegate.gestureControllerDidTranslate(this);
+    }
+
+    reset()
+    {
+        this.scale = 1;
+        this.translate = {x: 0, y: 0};
+
+        this._mouseWheelDelta = 0;
+    }
+
+    // Private
+
+    _startScaleInteraction(event)
+    {
+        this._scaleInteractionStartScale = this._scale;
+        if (this._supportsTranslate)
+            this._scaleInteractionStartTranslate = this._translate;
+
+        if (event.target === this._target) {
+            let elementBounds = this._target.getBoundingClientRect();
+            this._scaleInteractionStartPosition = {
+                x: (event.pageX - elementBounds.left - (elementBounds.width / 2)) / this._scaleInteractionStartScale,
+                y: (event.pageY - elementBounds.top - (elementBounds.height / 2)) / this._scaleInteractionStartScale,
+            };
+        } else
+            this._scaleInteractionStartPosition = {x: 0, y: 0};
+    }
+
+    _updateScaleInteraction(scale)
+    {
+        this.scale = this._scaleInteractionStartScale * scale;
+
+        if (this._supportsTranslate) {
+            this.translate = {
+                x: this._scaleInteractionStartTranslate.x - (this._scaleInteractionStartPosition.x * (this._scale - this._scaleInteractionStartScale)),
+                y: this._scaleInteractionStartTranslate.y - (this._scaleInteractionStartPosition.y * (this._scale - this._scaleInteractionStartScale)),
+            };
+        }
+    }
+
+    _endScaleInteraction() {
+        this._scaleInteractionStartScale = NaN;
+        if (this._supportsTranslate)
+            this._scaleInteractionStartTranslate = null;
+
+        this._scaleInteractionStartPosition = null;
+    }
+
+    _handleWheel(event)
+    {
+        // Ignore wheel events while handing gestures.
+        if (this._handlingGesture)
+            return;
+
+        // Require twice the vertical delta to overcome horizontal scrolling.
+        // This prevents most cases of inadvertent zooming for slightly diagonal scrolls.
+        if (Math.abs(event.deltaX) >= Math.abs(event.deltaY) * 0.5)
+            return;
+
+        let deviceDirection = event.webkitDirectionInvertedFromDevice ? -1 : 1;
+        let delta = (event.deltaZ || event.deltaY || event.deltaX) * deviceDirection / 1000;
+
+        // Reset accumulated wheel delta when direction changes.
+        if (delta < 0 && this._mouseWheelDelta >= 0 || delta >= 0 && this._mouseWheelDelta < 0)
+            this._mouseWheelDelta = 0;
+
+        this._mouseWheelDelta += delta;
+
+        this._startScaleInteraction(event);
+        this._updateScaleInteraction(1 - this._mouseWheelDelta);
+        this._endScaleInteraction();
+
+        event.preventDefault();
+        event.stopPropagation();
+    }
+
+    _handleGestureStart(event)
+    {
+        console.assert(!this._handlingGesture);
+        this._handlingGesture = true;
+
+        this._startScaleInteraction(event);
+
+        event.preventDefault();
+        event.stopPropagation();
+    }
+
+    _handleGestureChange(event)
+    {
+        console.assert(this._handlingGesture);
+
+        this._updateScaleInteraction(event.scale);
+
+        event.preventDefault();
+        event.stopPropagation();
+    }
+
+    _handleGestureEnd(event)
+    {
+        console.assert(this._handlingGesture);
+
+        this._handlingGesture = false;
+
+        this._endScaleInteraction();
+    }
+
+    _handleMouseDown(event)
+    {
+        if (event.target.draggable)
+            return;
+
+        if (event.button !== 0)
+            return;
+
+        this._translateInteractionStartTranslate = this._translate;
+
+        this._translateInteractionStartPosition = {
+            x: event.pageX,
+            y: event.pageY,
+        };
+
+        console.assert(!this._boundHandleMouseMove);
+        this._boundHandleMouseMove = this._handleMouseMove.bind(this);
+        window.addEventListener("mousemove", this._boundHandleMouseMove, {capture: true});
+
+        console.assert(!this._boundHandleMouseUp);
+        this._boundHandleMouseUp = this._handleMouseUp.bind(this);
+        window.addEventListener("mouseup", this._boundHandleMouseUp, {capture: true});
+    }
+
+    _handleMouseMove(event)
+    {
+        this.translate = {
+            x: this._translateInteractionStartTranslate.x + (event.pageX - this._translateInteractionStartPosition.x),
+            y: this._translateInteractionStartTranslate.y + (event.pageY - this._translateInteractionStartPosition.y),
+        };
+    }
+
+    _handleMouseUp(event)
+    {
+        window.removeEventListener("mousemove", this._boundHandleMouseMove, {capture: true});
+        this._boundHandleMouseMove = null;
+
+        window.removeEventListener("mouseup", this._boundHandleMouseUp, {capture: true});
+        this._boundHandleMouseUp = null;
+
+        this._translateInteractionStartTranslate = null;
+        this._translateInteractionStartPosition = null;
+    }
+};

inspector/Controllers/HARBuilder.js

@@ -0,0 +1,428 @@
+/*
+ * Copyright (C) 2017-2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// HTTP Archive (HAR) format - Version 1.2
+// https://dvcs.w3.org/hg/webperf/raw-file/tip/specs/HAR/Overview.html#sec-har-object-types-creator
+// http://www.softwareishard.com/blog/har-12-spec/
+
+WI.HARBuilder = class HARBuilder
+{
+    static async buildArchive(resources)
+    {
+        let promises = [];
+        for (let resource of resources) {
+            console.assert(resource.finished);
+            promises.push(new Promise((resolve, reject) => {
+                // Always resolve.
+                resource.requestContent().then(
+                    (x) => resolve(x),
+                    () => resolve(null)
+                );
+            }));
+        }
+
+        let contents = await Promise.all(promises);
+        console.assert(contents.length === resources.length);
+
+        return {
+            log: {
+                version: "1.2",
+                creator: HARBuilder.creator(),
+                pages: HARBuilder.pages(),
+                entries: resources.map((resource, index) => HARBuilder.entry(resource, contents[index])),
+            }
+        };
+    }
+
+    static creator()
+    {
+        return {
+            name: "WebKit Web Inspector",
+            version: "1.0",
+        };
+    }
+
+    static pages()
+    {
+        return [{
+            startedDateTime: HARBuilder.date(WI.networkManager.mainFrame.mainResource.requestSentDate),
+            id: "page_0",
+            title: WI.networkManager.mainFrame.url || "",
+            pageTimings: HARBuilder.pageTimings(),
+        }];
+    }
+
+    static pageTimings()
+    {
+        let result = {};
+
+        let domContentReadyEventTimestamp = WI.networkManager.mainFrame.domContentReadyEventTimestamp;
+        if (!isNaN(domContentReadyEventTimestamp))
+            result.onContentLoad = domContentReadyEventTimestamp * 1000;
+
+        let loadEventTimestamp = WI.networkManager.mainFrame.loadEventTimestamp;
+        if (!isNaN(loadEventTimestamp))
+            result.onLoad = loadEventTimestamp * 1000;
+
+        return result;
+    }
+
+    static entry(resource, content)
+    {
+        let entry = {
+            pageref: "page_0",
+            startedDateTime: HARBuilder.date(resource.requestSentDate),
+            time: 0,
+            request: HARBuilder.request(resource),
+            response: HARBuilder.response(resource, content),
+            cache: HARBuilder.cache(resource),
+            timings: HARBuilder.timings(resource),
+        };
+
+        if (resource.timingData.startTime && resource.timingData.responseEnd)
+            entry.time = (resource.timingData.responseEnd - resource.timingData.startTime) * 1000;
+        if (resource.remoteAddress) {
+            entry.serverIPAddress = HARBuilder.ipAddress(resource.remoteAddress);
+
+            // WebKit Custom Field `_serverPort`.
+            if (entry.serverIPAddress)
+                entry._serverPort = HARBuilder.port(resource.remoteAddress);
+        }
+        if (resource.connectionIdentifier)
+            entry.connection = "" + resource.connectionIdentifier;
+
+        // CFNetwork Custom Field `_fetchType`.
+        if (resource.responseSource !== WI.Resource.ResponseSource.Unknown)
+            entry._fetchType = HARBuilder.fetchType(resource.responseSource);
+
+        // WebKit Custom Field `_priority`.
+        if (resource.priority !== WI.Resource.NetworkPriority.Unknown)
+            entry._priority = HARBuilder.priority(resource.priority);
+
+        return entry;
+    }
+
+    static request(resource)
+    {
+        let result = {
+            method: resource.requestMethod || "",
+            url: resource.url || "",
+            httpVersion: WI.Resource.displayNameForProtocol(resource.protocol) || "",
+            cookies: HARBuilder.cookies(resource.requestCookies, null),
+            headers: HARBuilder.headers(resource.requestHeaders),
+            queryString: resource.queryStringParameters || [],
+            headersSize: !isNaN(resource.requestHeadersTransferSize) ? resource.requestHeadersTransferSize : -1,
+            bodySize: !isNaN(resource.requestBodyTransferSize) ? resource.requestBodyTransferSize : -1,
+        };
+
+        if (resource.requestData)
+            result.postData = HARBuilder.postData(resource);
+
+        return result;
+    }
+
+    static response(resource, content)
+    {
+        let result = {
+            status: resource.statusCode || 0,
+            statusText: resource.statusText || "",
+            httpVersion: WI.Resource.displayNameForProtocol(resource.protocol) || "",
+            cookies: HARBuilder.cookies(resource.responseCookies, resource.requestSentDate),
+            headers: HARBuilder.headers(resource.responseHeaders),
+            content: HARBuilder.content(resource, content),
+            redirectURL: resource.responseHeaders.valueForCaseInsensitiveKey("Location") || "",
+            headersSize: !isNaN(resource.responseHeadersTransferSize) ? resource.responseHeadersTransferSize : -1,
+            bodySize: !isNaN(resource.responseBodyTransferSize) ? resource.responseBodyTransferSize : -1,
+        };
+
+        // Chrome Custom Field `_transferSize`.
+        if (!isNaN(resource.networkTotalTransferSize))
+            result._transferSize = resource.networkTotalTransferSize;
+
+        // Chrome Custom Field `_error`.
+        if (resource.failureReasonText)
+            result._error = resource.failureReasonText;
+
+        return result;
+    }
+
+    static cookies(cookies, requestSentDate)
+    {
+        let result = [];
+
+        for (let cookie of cookies) {
+            let json = {
+                name: cookie.name,
+                value: cookie.value,
+            };
+
+            if (cookie.type === WI.Cookie.Type.Response) {
+                if (cookie.path)
+                    json.path = cookie.path;
+                if (cookie.domain)
+                    json.domain = cookie.domain;
+                json.expires = HARBuilder.date(cookie.expirationDate(requestSentDate));
+                json.httpOnly = cookie.httpOnly;
+                json.secure = cookie.secure;
+                if (cookie.sameSite !== WI.Cookie.SameSiteType.None)
+                    json.sameSite = cookie.sameSite;
+            }
+
+            result.push(json);
+        }
+
+        return result;
+    }
+
+    static headers(headers)
+    {
+        let result = [];
+
+        for (let key in headers)
+            result.push({name: key, value: headers[key]});
+
+        return result;
+    }
+
+    static content(resource, content)
+    {
+        let encodedSize = !isNaN(resource.networkEncodedSize) ? resource.networkEncodedSize : resource.estimatedNetworkEncodedSize;
+        let decodedSize = !isNaN(resource.networkDecodedSize) ? resource.networkDecodedSize : resource.size;
+
+        if (isNaN(decodedSize))
+            decodedSize = 0;
+        if (isNaN(encodedSize))
+            encodedSize = 0;
+
+        let result = {
+            size: decodedSize,
+            compression: decodedSize - encodedSize,
+            mimeType: resource.mimeType || "x-unknown",
+        };
+
+        if (content) {
+            if (content.rawContent)
+                result.text = content.rawContent;
+            if (content.rawBase64Encoded)
+                result.encoding = "base64";
+        }
+
+        return result;
+    }
+
+    static postData(resource)
+    {
+        return {
+            mimeType: resource.requestDataContentType || "",
+            text: resource.requestData,
+            params: resource.requestFormParameters || [],
+        };
+    }
+
+    static cache(resource)
+    {
+        // FIXME: <https://webkit.org/b/178682> Web Inspector: Include <cache> details in HAR Export
+        // http://www.softwareishard.com/blog/har-12-spec/#cache
+        return {};
+    }
+
+    static timings(resource)
+    {
+        // FIXME: <https://webkit.org/b/195694> Web Inspector: HAR Extension for Redirect Timing Info
+        // Chrome has Custom Fields `_blocked_queueing` and `_blocked_proxy`.
+
+        let result = {
+            blocked: -1,
+            dns: -1,
+            connect: -1,
+            ssl: -1,
+            send: 0,
+            wait: 0,
+            receive: 0,
+        };
+
+        if (resource.timingData.startTime && resource.timingData.responseEnd) {
+            let {startTime, domainLookupStart, domainLookupEnd, connectStart, connectEnd, secureConnectionStart, requestStart, responseStart, responseEnd} = resource.timingData;
+            result.blocked = ((domainLookupStart || connectStart || requestStart) - startTime) * 1000;
+            if (domainLookupStart)
+                result.dns = ((domainLookupEnd || connectStart || requestStart) - domainLookupStart) * 1000;
+            if (connectStart)
+                result.connect = ((connectEnd || requestStart) - connectStart) * 1000;
+            if (secureConnectionStart)
+                result.ssl = ((connectEnd || requestStart) - secureConnectionStart) * 1000;
+
+            // If all the time before requestStart was included in blocked, then make send time zero
+            // as send time is essentially just blocked time after dns / connection time, and we
+            // do not want to double count it.
+            result.send = (domainLookupEnd || connectEnd) ? (requestStart - (connectEnd || domainLookupEnd)) * 1000 : 0;
+
+            result.wait = (responseStart - requestStart) * 1000;
+            result.receive = (responseEnd - responseStart) * 1000;
+        }
+
+        return result;
+    }
+
+    // Helpers
+
+    static ipAddress(remoteAddress)
+    {
+        // IP Address, without port.
+        if (!remoteAddress)
+            return "";
+
+        // NOTE: Resource.remoteAddress always includes the port at the end.
+        // So this always strips the last part.
+        return remoteAddress.replace(/:\d+$/, "");
+    }
+
+    static port(remoteAddress)
+    {
+        // IP Address, without port.
+        if (!remoteAddress)
+            return undefined;
+
+        // NOTE: Resource.remoteAddress always includes the port at the end.
+        // So this always matches the last part.
+        let index = remoteAddress.lastIndexOf(":");
+        if (!index)
+            return undefined;
+
+        let portString = remoteAddress.substr(index + 1);
+        let port = parseInt(portString);
+        if (isNaN(port))
+            return undefined;
+
+        return port;
+    }
+
+    static date(date)
+    {
+        // ISO 8601
+        if (!date)
+            return "";
+
+        return date.toISOString();
+    }
+
+    static fetchType(responseSource)
+    {
+        switch (responseSource) {
+        case WI.Resource.ResponseSource.Network:
+            return "Network Load";
+        case WI.Resource.ResponseSource.MemoryCache:
+            return "Memory Cache";
+        case WI.Resource.ResponseSource.DiskCache:
+            return "Disk Cache";
+        case WI.Resource.ResponseSource.ServiceWorker:
+            return "Service Worker";
+        case WI.Resource.ResponseSource.InspectorOverride:
+            return "Inspector Override";
+        }
+
+        console.assert();
+        return undefined;
+    }
+
+    static priority(priority)
+    {
+        switch (priority) {
+        case WI.Resource.NetworkPriority.Low:
+            return "low";
+        case WI.Resource.NetworkPriority.Medium:
+            return "medium";
+        case WI.Resource.NetworkPriority.High:
+            return "high";
+        }
+
+        console.assert();
+        return undefined;
+    }
+
+    // Consuming.
+
+    static dateFromHARDate(isoString)
+    {
+        return Date.parse(isoString);
+    }
+
+    static protocolFromHARProtocol(protocol)
+    {
+        switch (protocol) {
+        case "HTTP/2":
+            return "h2";
+        case "HTTP/1.0":
+            return "http/1.0";
+        case "HTTP/1.1":
+            return "http/1.1";
+        case "SPDY/2":
+            return "spdy/2";
+        case "SPDY/3":
+            return "spdy/3";
+        case "SPDY/3.1":
+            return "spdy/3.1";
+        }
+
+        if (protocol)
+            console.warn("Unknown HAR protocol value", protocol);
+        return null;
+    }
+
+    static responseSourceFromHARFetchType(fetchType)
+    {
+        switch (fetchType) {
+        case "Network Load":
+            return WI.Resource.ResponseSource.Network;
+        case "Memory Cache":
+            return WI.Resource.ResponseSource.MemoryCache;
+        case "Disk Cache":
+            return WI.Resource.ResponseSource.DiskCache;
+        case "Service Worker":
+            return WI.Resource.ResponseSource.ServiceWorker;
+        case "Inspector Override":
+            return WI.Resource.ResponseSource.InspectorOverride;
+        }
+
+        if (fetchType)
+            console.warn("Unknown HAR _fetchType value", fetchType);
+        return WI.Resource.ResponseSource.Other;
+    }
+
+    static networkPriorityFromHARPriority(priority)
+    {
+        switch (priority) {
+        case "low":
+            return WI.Resource.NetworkPriority.Low;
+        case "medium":
+            return WI.Resource.NetworkPriority.Medium;
+        case "high":
+            return WI.Resource.NetworkPriority.High;
+        }
+
+        if (priority)
+            console.warn("Unknown HAR priority value", priority);
+        return WI.Resource.NetworkPriority.Unknown;
+    }
+};

inspector/Controllers/HeapManager.js

@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: HeapManager lacks advanced multi-target support. (Instruments/Profilers per-target)
+
+WI.HeapManager = class HeapManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+    }
+
+    // Agent
+
+    get domains() { return ["Heap"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "Heap");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("Heap"))
+            target.HeapAgent.enable();
+    }
+
+    // Public
+
+    enable()
+    {
+        if (this._enabled)
+            return;
+
+        this._enabled = true;
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    disable()
+    {
+        if (!this._enabled)
+            return;
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("Heap"))
+                target.HeapAgent.disable();
+        }
+
+        this._enabled = false;
+    }
+
+    snapshot(callback)
+    {
+        console.assert(this._enabled);
+
+        let target = WI.assumingMainTarget();
+        target.HeapAgent.snapshot((error, timestamp, snapshotStringData) => {
+            if (error)
+                console.error(error);
+            callback(error, timestamp, snapshotStringData);
+        });
+    }
+
+    getPreview(node, callback)
+    {
+        console.assert(this._enabled);
+        console.assert(node instanceof WI.HeapSnapshotNodeProxy);
+
+        let target = WI.assumingMainTarget();
+        target.HeapAgent.getPreview(node.id, (error, string, functionDetails, preview) => {
+            if (error)
+                console.error(error);
+            callback(error, string, functionDetails, preview);
+        });
+    }
+
+    getRemoteObject(node, objectGroup, callback)
+    {
+        console.assert(this._enabled);
+        console.assert(node instanceof WI.HeapSnapshotNodeProxy);
+
+        let target = WI.assumingMainTarget();
+        target.HeapAgent.getRemoteObject(node.id, objectGroup, (error, result) => {
+            if (error)
+                console.error(error);
+            callback(error, result);
+        });
+    }
+
+    // HeapObserver
+
+    garbageCollected(target, payload)
+    {
+        if (!this._enabled)
+            return;
+
+        // FIXME: <https://webkit.org/b/167323> Web Inspector: Enable Memory profiling in Workers
+        if (target !== WI.mainTarget)
+            return;
+
+        let collection = WI.GarbageCollection.fromPayload(payload);
+        this.dispatchEventToListeners(WI.HeapManager.Event.GarbageCollected, {collection});
+    }
+};
+
+WI.HeapManager.Event = {
+    GarbageCollected: "heap-manager-garbage-collected"
+};

inspector/Controllers/IndexedDBManager.js

@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ * Copyright (C) 2013 Samsung Electronics. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: IndexedDBManager lacks advanced multi-target support. (IndexedDatabase per-target)
+
+WI.IndexedDBManager = class IndexedDBManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+        this._requestedSecurityOrigins = new Set;
+
+        this._reset();
+    }
+
+    // Agent
+
+    get domains() { return ["IndexedDB"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "IndexedDB");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("IndexedDB"))
+            target.IndexedDBAgent.enable();
+    }
+
+    // Public
+
+    get indexedDatabases() { return this._indexedDatabases; }
+
+    enable()
+    {
+        console.assert(!this._enabled);
+
+        this._enabled = true;
+
+        this._reset();
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.addEventListener(WI.Frame.Event.SecurityOriginDidChange, this._securityOriginDidChange, this);
+    }
+
+    disable()
+    {
+        console.assert(this._enabled);
+
+        this._enabled = false;
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("IndexedDB"))
+                target.IndexedDBAgent.disable();
+        }
+
+        WI.Frame.removeEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
+        WI.Frame.removeEventListener(WI.Frame.Event.SecurityOriginDidChange, this._securityOriginDidChange, this);
+
+        this._reset();
+    }
+
+    requestIndexedDatabaseData(objectStore, objectStoreIndex, startEntryIndex, maximumEntryCount, callback)
+    {
+        console.assert(this._enabled);
+        console.assert(InspectorBackend.hasDomain("IndexedDB"));
+        console.assert(objectStore);
+        console.assert(callback);
+
+        function processData(error, entryPayloads, moreAvailable)
+        {
+            if (error) {
+                callback(null, false);
+                return;
+            }
+
+            var entries = [];
+
+            for (var entryPayload of entryPayloads) {
+                var entry = {};
+                entry.primaryKey = WI.RemoteObject.fromPayload(entryPayload.primaryKey);
+                entry.key = WI.RemoteObject.fromPayload(entryPayload.key);
+                entry.value = WI.RemoteObject.fromPayload(entryPayload.value);
+                entries.push(entry);
+            }
+
+            callback(entries, moreAvailable);
+        }
+
+        var requestArguments = {
+            securityOrigin: objectStore.parentDatabase.securityOrigin,
+            databaseName: objectStore.parentDatabase.name,
+            objectStoreName: objectStore.name,
+            indexName: objectStoreIndex && objectStoreIndex.name || "",
+            skipCount: startEntryIndex || 0,
+            pageSize: maximumEntryCount || 100
+        };
+
+        let target = WI.assumingMainTarget();
+        target.IndexedDBAgent.requestData.invoke(requestArguments, processData);
+    }
+
+    clearObjectStore(objectStore)
+    {
+        console.assert(this._enabled);
+
+        let securityOrigin = objectStore.parentDatabase.securityOrigin;
+        let databaseName = objectStore.parentDatabase.name;
+        let objectStoreName = objectStore.name;
+
+        let target = WI.assumingMainTarget();
+        target.IndexedDBAgent.clearObjectStore(securityOrigin, databaseName, objectStoreName);
+    }
+
+    // Private
+
+    _reset()
+    {
+        this._indexedDatabases = [];
+        this._requestedSecurityOrigins.clear();
+        this.dispatchEventToListeners(WI.IndexedDBManager.Event.Cleared);
+
+        let mainFrame = WI.networkManager.mainFrame;
+        if (mainFrame)
+            this._addIndexedDBDatabasesIfNeeded(mainFrame);
+    }
+
+    _addIndexedDBDatabasesIfNeeded(frame)
+    {
+        if (!this._enabled)
+            return;
+
+        let target = WI.assumingMainTarget();
+        if (!target.hasDomain("IndexedDB"))
+            return;
+
+        var securityOrigin = frame.securityOrigin;
+
+        // Don't show storage if we don't have a security origin (about:blank).
+        if (!securityOrigin || securityOrigin === "://")
+            return;
+
+        if (this._requestedSecurityOrigins.has(securityOrigin))
+            return;
+
+        this._requestedSecurityOrigins.add(securityOrigin);
+
+        function processDatabaseNames(error, names)
+        {
+            if (error || !names)
+                return;
+
+            for (var name of names)
+                target.IndexedDBAgent.requestDatabase(securityOrigin, name, processDatabase.bind(this));
+        }
+
+        function processDatabase(error, databasePayload)
+        {
+            if (error || !databasePayload)
+                return;
+
+            var objectStores = databasePayload.objectStores.map(processObjectStore);
+            var indexedDatabase = new WI.IndexedDatabase(databasePayload.name, securityOrigin, databasePayload.version, objectStores);
+
+            this._indexedDatabases.push(indexedDatabase);
+            this.dispatchEventToListeners(WI.IndexedDBManager.Event.IndexedDatabaseWasAdded, {indexedDatabase});
+        }
+
+        function processKeyPath(keyPathPayload)
+        {
+            switch (keyPathPayload.type) {
+            case InspectorBackend.Enum.IndexedDB.KeyPathType.Null:
+                return null;
+            case InspectorBackend.Enum.IndexedDB.KeyPathType.String:
+                return keyPathPayload.string;
+            case InspectorBackend.Enum.IndexedDB.KeyPathType.Array:
+                return keyPathPayload.array;
+            default:
+                console.error("Unknown KeyPath type:", keyPathPayload.type);
+                return null;
+            }
+        }
+
+        function processObjectStore(objectStorePayload)
+        {
+            var keyPath = processKeyPath(objectStorePayload.keyPath);
+            var indexes = objectStorePayload.indexes.map(processObjectStoreIndex);
+            return new WI.IndexedDatabaseObjectStore(objectStorePayload.name, keyPath, objectStorePayload.autoIncrement, indexes);
+        }
+
+        function processObjectStoreIndex(objectStoreIndexPayload)
+        {
+            var keyPath = processKeyPath(objectStoreIndexPayload.keyPath);
+            return new WI.IndexedDatabaseObjectStoreIndex(objectStoreIndexPayload.name, keyPath, objectStoreIndexPayload.unique, objectStoreIndexPayload.multiEntry);
+        }
+
+        target.IndexedDBAgent.requestDatabaseNames(securityOrigin, processDatabaseNames.bind(this));
+    }
+
+    _mainResourceDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        if (event.target.isMainFrame())
+            this._reset();
+    }
+
+    _securityOriginDidChange(event)
+    {
+        console.assert(event.target instanceof WI.Frame);
+
+        this._addIndexedDBDatabasesIfNeeded(event.target);
+    }
+};
+
+WI.IndexedDBManager.Event = {
+    IndexedDatabaseWasAdded: "indexed-db-manager-indexed-database-was-added",
+    Cleared: "indexed-db-manager-cleared",
+};

inspector/Controllers/InspectedTargetTypesDiagnosticEventRecorder.js

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.InspectedTargetTypesDiagnosticEventRecorder = class InspectedTargetTypesDiagnosticEventRecorder extends WI.DiagnosticEventRecorder
+{
+    constructor(controller)
+    {
+        super("InspectedTargetTypes", controller);
+
+        this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+    }
+
+    // Static
+
+    static get initialDelayBeforeSamplingInterval()
+    {
+        return 5 * 1000; // In milliseconds.
+    }
+
+    // Protected
+
+    setup()
+    {
+        // If it's been less than 5 seconds since the frontend loaded, wait a bit.
+        if (performance.now() - WI.frontendCompletedLoadTimestamp < InspectedTargetTypesDiagnosticEventRecorder.initialDelayBeforeSamplingInterval)
+            this._startInitialDelayBeforeSamplingTimer();
+        else
+            this._sampleInspectedTarget();
+
+    }
+
+    teardown()
+    {
+        this._stopInitialDelayBeforeSamplingTimer();
+    }
+
+    // Private
+
+    _startInitialDelayBeforeSamplingTimer()
+    {
+        if (this._initialDelayBeforeSamplingTimerIdentifier) {
+            clearTimeout(this._initialDelayBeforeSamplingTimerIdentifier);
+            this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+        }
+
+        // All intervals are in milliseconds.
+        let maximumInitialDelay = InspectedTargetTypesDiagnosticEventRecorder.initialDelayBeforeSamplingInterval;
+        let elapsedTime = performance.now() - WI.frontendCompletedLoadTimestamp;
+        let remainingTime = maximumInitialDelay - elapsedTime;
+        let initialDelay = Number.constrain(remainingTime, 0, maximumInitialDelay);
+        this._initialDelayBeforeSamplingTimerIdentifier = setTimeout(this._sampleInspectedTarget.bind(this), initialDelay);
+    }
+
+    _stopInitialDelayBeforeSamplingTimer()
+    {
+        if (this._initialDelayBeforeSamplingTimerIdentifier) {
+            clearTimeout(this._initialDelayBeforeSamplingTimerIdentifier);
+            this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+        }
+    }
+
+    _sampleInspectedTarget()
+    {
+        this._stopInitialDelayBeforeSamplingTimer();
+
+        this.logDiagnosticEvent(this.name, {
+            debuggableType: this._determineDebuggableType(),
+            targetPlatformName: this._determineTargetPlatformName(),
+            targetBuildVersion: this._determineTargetBuildVersion(),
+            targetProductVersion: this._determineTargetProductVersion(),
+            targetIsSimulator: this._determineTargetIsSimulator(),
+        });
+    }
+
+    _determineDebuggableType()
+    {
+        this._ensureCachedDebuggableInfo();
+
+        return this._cachedDebuggableInfo.debuggableType;
+    }
+
+    _determineTargetPlatformName()
+    {
+        this._ensureCachedDebuggableInfo();
+
+        return this._cachedDebuggableInfo.targetPlatformName;
+    }
+
+    _determineTargetBuildVersion()
+    {
+        this._ensureCachedDebuggableInfo();
+
+        return this._cachedDebuggableInfo.targetBuildVersion;
+    }
+
+    _determineTargetProductVersion()
+    {
+        this._ensureCachedDebuggableInfo();
+
+        return this._cachedDebuggableInfo.targetProductVersion;
+    }
+
+    _determineTargetIsSimulator()
+    {
+        this._ensureCachedDebuggableInfo();
+
+        return !!this._cachedDebuggableInfo.targetIsSimulator;
+    }
+
+    _ensureCachedDebuggableInfo()
+    {
+        if (this._cachedDebuggableInfo)
+            return;
+
+        let debuggableInfo = InspectorFrontendHost.debuggableInfo;
+        this._cachedDebuggableInfo = {
+            debuggableType: WI.DebuggableType.fromString(debuggableInfo.debuggableType) || WI.DebuggableType.JavaScript,
+            targetPlatformName: debuggableInfo.targetPlatformName || "Unknown",
+            targetBuildVersion: debuggableInfo.targetBuildVersion || "Unknown",
+            targetProductVersion: debuggableInfo.targetProductVersion || "Unknown",
+            targetIsSimulator: debuggableInfo.targetIsSimulator,
+        };
+    }
+};

inspector/Controllers/JavaScriptLogViewController.js

@@ -0,0 +1,394 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.JavaScriptLogViewController = class JavaScriptLogViewController extends WI.Object
+{
+    constructor(element, scrollElement, textPrompt, delegate, historySettingIdentifier)
+    {
+        super();
+
+        console.assert(textPrompt instanceof WI.ConsolePrompt);
+        console.assert(historySettingIdentifier);
+
+        this._element = element;
+        this._scrollElement = scrollElement;
+
+        this._promptHistorySetting = new WI.Setting(historySettingIdentifier, null);
+
+        this._prompt = textPrompt;
+        this._prompt.delegate = this;
+        this._prompt.history = this._promptHistorySetting.value;
+
+        this.delegate = delegate;
+
+        this._cleared = true;
+        this._previousMessageView = null;
+        this._lastCommitted = {text: "", special: false};
+        this._repeatCountWasInterrupted = false;
+
+        this._sessions = [];
+        this._currentSessionOrGroup = null;
+
+        this.messagesAlternateClearKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Control, "L", this.requestClearMessages.bind(this), this._element);
+
+        this._messagesFindNextKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.CommandOrControl, "G", this._handleFindNextShortcut.bind(this), this._element);
+        this._messagesFindPreviousKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.CommandOrControl | WI.KeyboardShortcut.Modifier.Shift, "G", this._handleFindPreviousShortcut.bind(this), this._element);
+
+        this._promptAlternateClearKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Control, "L", this.requestClearMessages.bind(this), this._prompt.element);
+        this._promptFindNextKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.CommandOrControl, "G", this._handleFindNextShortcut.bind(this), this._prompt.element);
+        this._promptFindPreviousKeyboardShortcut = new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.CommandOrControl | WI.KeyboardShortcut.Modifier.Shift, "G", this._handleFindPreviousShortcut.bind(this), this._prompt.element);
+
+        WI.settings.showConsoleMessageTimestamps.addEventListener(WI.Setting.Event.Changed, this._handleShowConsoleMessageTimestampsSettingChanged, this);
+
+        this._pendingMessagesForSessionOrGroup = new Map;
+        this._scheduledRenderIdentifier = 0;
+
+        this._consoleMessageViews = [];
+        this._showTimestamps = WI.settings.showConsoleMessageTimestamps.value;
+
+        this.startNewSession();
+    }
+
+    // Public
+
+    clear()
+    {
+        this._cleared = true;
+
+        const clearPreviousSessions = true;
+        this.startNewSession(clearPreviousSessions, {newSessionReason: WI.ConsoleSession.NewSessionReason.ConsoleCleared});
+    }
+
+    startNewSession(clearPreviousSessions = false, data = {})
+    {
+        if (clearPreviousSessions) {
+            this._pendingMessagesForSessionOrGroup.clear();
+
+            if (this._sessions.length) {
+                for (let session of this._sessions)
+                    session.element.remove();
+
+                this._sessions = [];
+                this._currentSessionOrGroup = null;
+            }
+        }
+
+        // First session shows the time when the console was opened.
+        if (!this._sessions.length)
+            data.timestamp = Date.now();
+
+        let lastSession = this._sessions.lastValue;
+
+        // Remove empty session.
+        if (lastSession && !lastSession.hasMessages() && !this._pendingMessagesForSessionOrGroup.has(lastSession)) {
+            this._sessions.pop();
+            lastSession.element.remove();
+        }
+
+        let consoleSession = new WI.ConsoleSession(data);
+
+        this._previousMessageView = null;
+        this._lastCommitted = {text: "", special: false};
+        this._repeatCountWasInterrupted = false;
+
+        this._sessions.push(consoleSession);
+        this._currentSessionOrGroup = consoleSession;
+
+        this._element.appendChild(consoleSession.element);
+
+        // Make sure the new session is visible.
+        consoleSession.element.scrollIntoView();
+    }
+
+    appendImmediateExecutionWithResult(text, result, {addSpecialUserLogClass, shouldRevealConsole, handleClick} = {})
+    {
+        console.assert(result instanceof WI.RemoteObject);
+
+        if (this._lastCommitted.text !== text || this._lastCommitted.special !== addSpecialUserLogClass) {
+            let classNames = [];
+            if (addSpecialUserLogClass)
+                classNames.push("special-user-log");
+
+            let commandMessageView = new WI.ConsoleCommandView(text, {classNames, handleClick});
+            this._appendConsoleMessageView(commandMessageView, true);
+            this._lastCommitted = {text, special: addSpecialUserLogClass};
+        }
+
+        function saveResultCallback(savedResultIndex)
+        {
+            let commandResultMessage = new WI.ConsoleCommandResultMessage(result.target, result, false, savedResultIndex, shouldRevealConsole);
+            let commandResultMessageView = new WI.ConsoleMessageView(commandResultMessage);
+            this._appendConsoleMessageView(commandResultMessageView, true);
+        }
+
+        WI.runtimeManager.saveResult(result, saveResultCallback.bind(this));
+    }
+
+    appendConsoleMessage(consoleMessage)
+    {
+        var consoleMessageView = new WI.ConsoleMessageView(consoleMessage);
+        this._appendConsoleMessageView(consoleMessageView);
+        return consoleMessageView;
+    }
+
+    updatePreviousMessageRepeatCount(count, timestamp)
+    {
+        console.assert(this._previousMessageView);
+        if (!this._previousMessageView)
+            return false;
+
+        var previousIgnoredCount = this._previousMessageView[WI.JavaScriptLogViewController.IgnoredRepeatCount] || 0;
+        var previousVisibleCount = this._previousMessageView.repeatCount;
+        this._previousMessageView.timestamp = timestamp;
+
+        if (!this._repeatCountWasInterrupted) {
+            this._previousMessageView.repeatCount = count - previousIgnoredCount;
+            return true;
+        }
+
+        var consoleMessage = this._previousMessageView.message;
+        var duplicatedConsoleMessageView = new WI.ConsoleMessageView(consoleMessage);
+        duplicatedConsoleMessageView[WI.JavaScriptLogViewController.IgnoredRepeatCount] = previousIgnoredCount + previousVisibleCount;
+        duplicatedConsoleMessageView.repeatCount = 1;
+        this._appendConsoleMessageView(duplicatedConsoleMessageView);
+
+        return true;
+    }
+
+    isScrolledToBottom()
+    {
+        // Lie about being scrolled to the bottom if we have a pending request to scroll to the bottom soon.
+        return this._scrollToBottomTimeout || this._scrollElement.isScrolledToBottom();
+    }
+
+    scrollToBottom()
+    {
+        if (this._scrollToBottomTimeout)
+            return;
+
+        function delayedWork()
+        {
+            this._scrollToBottomTimeout = null;
+            this._scrollElement.scrollTop = this._scrollElement.scrollHeight;
+        }
+
+        // Don't scroll immediately so we are not causing excessive layouts when there
+        // are many messages being added at once.
+        this._scrollToBottomTimeout = setTimeout(delayedWork.bind(this), 0);
+    }
+
+    requestClearMessages()
+    {
+        WI.consoleManager.requestClearMessages();
+    }
+
+    // Protected
+
+    consolePromptHistoryDidChange(prompt)
+    {
+        this._promptHistorySetting.value = this._prompt.history;
+    }
+
+    consolePromptShouldCommitText(prompt, text, cursorIsAtLastPosition, handler)
+    {
+        // Always commit the text if we are not at the last position.
+        if (!cursorIsAtLastPosition) {
+            handler(true);
+            return;
+        }
+
+        function parseFinished(error, result, message, range)
+        {
+            handler(result !== InspectorBackend.Enum.Runtime.SyntaxErrorType.Recoverable);
+        }
+
+        WI.runtimeManager.activeExecutionContext.target.RuntimeAgent.parse(text, parseFinished.bind(this));
+    }
+
+    consolePromptTextCommitted(prompt, text)
+    {
+        console.assert(text);
+
+        if (this._lastCommitted.text !== text || this._lastCommitted.special) {
+            let commandMessageView = new WI.ConsoleCommandView(text);
+            this._appendConsoleMessageView(commandMessageView, true);
+            this._lastCommitted = {text, special: false};
+        }
+
+        function printResult(result, wasThrown, savedResultIndex)
+        {
+            if (!result || this._cleared)
+                return;
+
+            let shouldRevealConsole = true;
+            let commandResultMessage = new WI.ConsoleCommandResultMessage(result.target, result, wasThrown, savedResultIndex, shouldRevealConsole);
+            let commandResultMessageView = new WI.ConsoleMessageView(commandResultMessage);
+            this._appendConsoleMessageView(commandResultMessageView, true);
+        }
+
+        let options = {
+            objectGroup: WI.RuntimeManager.ConsoleObjectGroup,
+            includeCommandLineAPI: true,
+            doNotPauseOnExceptionsAndMuteConsole: false,
+            returnByValue: false,
+            generatePreview: true,
+            saveResult: true,
+            emulateUserGesture: WI.settings.emulateInUserGesture.value,
+            sourceURLAppender: appendWebInspectorConsoleEvaluationSourceURL,
+        };
+
+        WI.runtimeManager.evaluateInInspectedWindow(text, options, printResult.bind(this));
+    }
+
+    // Private
+
+    _handleFindNextShortcut()
+    {
+        this.delegate.highlightNextSearchMatch();
+    }
+
+    _handleFindPreviousShortcut()
+    {
+        this.delegate.highlightPreviousSearchMatch();
+    }
+
+    _appendConsoleMessageView(messageView, repeatCountWasInterrupted)
+    {
+        let pendingMessagesForSession = this._pendingMessagesForSessionOrGroup.get(this._currentSessionOrGroup);
+        if (!pendingMessagesForSession) {
+            pendingMessagesForSession = [];
+            this._pendingMessagesForSessionOrGroup.set(this._currentSessionOrGroup, pendingMessagesForSession);
+        }
+        pendingMessagesForSession.push(messageView);
+        this._consoleMessageViews.push(messageView);
+
+        this._cleared = false;
+        this._repeatCountWasInterrupted = repeatCountWasInterrupted || false;
+
+        if (!repeatCountWasInterrupted)
+            this._previousMessageView = messageView;
+
+        if (messageView.message && messageView.message.source !== WI.ConsoleMessage.MessageSource.JS)
+            this._lastCommitted = {test: "", special: false};
+
+        if (WI.consoleContentView.isAttached)
+            this.renderPendingMessagesSoon();
+
+        if (!WI.isShowingConsoleTab() && messageView.message && messageView.message.shouldRevealConsole)
+            WI.showSplitConsole();
+    }
+
+    renderPendingMessages()
+    {
+        if (this._scheduledRenderIdentifier) {
+            cancelAnimationFrame(this._scheduledRenderIdentifier);
+            this._scheduledRenderIdentifier = 0;
+        }
+
+        if (!this._pendingMessagesForSessionOrGroup.size)
+            return;
+
+        let wasScrolledToBottom = this.isScrolledToBottom();
+        let savedCurrentConsoleGroup = this._currentSessionOrGroup;
+        let lastMessageView = null;
+
+        const maxMessagesPerFrame = 100;
+        let renderedMessages = 0;
+        for (let [session, messages] of this._pendingMessagesForSessionOrGroup) {
+            this._currentSessionOrGroup = session;
+
+            let messagesToRender = messages.splice(0, maxMessagesPerFrame - renderedMessages);
+            for (let message of messagesToRender) {
+                message.render();
+                this._didRenderConsoleMessageView(message);
+            }
+
+            lastMessageView = messagesToRender.lastValue;
+
+            if (!messages.length)
+                this._pendingMessagesForSessionOrGroup.delete(session);
+
+            renderedMessages += messagesToRender.length;
+            if (renderedMessages >= maxMessagesPerFrame)
+                break;
+        }
+
+        this._currentSessionOrGroup = savedCurrentConsoleGroup;
+
+        this._currentSessionOrGroup.element.classList.toggle("timestamps-visible", this._showTimestamps);
+
+        if (wasScrolledToBottom || lastMessageView instanceof WI.ConsoleCommandView || lastMessageView.message.type === WI.ConsoleMessage.MessageType.Result || lastMessageView.message.type === WI.ConsoleMessage.MessageType.Image)
+            this.scrollToBottom();
+
+        WI.quickConsole.needsLayout();
+
+        if (this._pendingMessagesForSessionOrGroup.size)
+            this.renderPendingMessagesSoon();
+    }
+
+    renderPendingMessagesSoon()
+    {
+        if (this._scheduledRenderIdentifier)
+            return;
+
+        this._scheduledRenderIdentifier = requestAnimationFrame(() => this.renderPendingMessages());
+    }
+
+    _didRenderConsoleMessageView(messageView)
+    {
+        var type = messageView instanceof WI.ConsoleCommandView ? null : messageView.message.type;
+        if (type === WI.ConsoleMessage.MessageType.EndGroup) {
+            var parentGroup = this._currentSessionOrGroup.parentGroup;
+            if (parentGroup)
+                this._currentSessionOrGroup = parentGroup;
+        } else {
+            if (type === WI.ConsoleMessage.MessageType.StartGroup || type === WI.ConsoleMessage.MessageType.StartGroupCollapsed) {
+                var group = new WI.ConsoleGroup(this._currentSessionOrGroup);
+                var groupElement = group.render(messageView);
+                this._currentSessionOrGroup.append(groupElement);
+                this._currentSessionOrGroup = group;
+            } else
+                this._currentSessionOrGroup.addMessageView(messageView);
+        }
+
+        if (this.delegate && typeof this.delegate.didAppendConsoleMessageView === "function")
+            this.delegate.didAppendConsoleMessageView(messageView);
+    }
+
+    _handleShowConsoleMessageTimestampsSettingChanged()
+    {
+        this._showTimestamps = WI.settings.showConsoleMessageTimestamps.value;
+        this._currentSessionOrGroup.element.classList.toggle("timestamps-visible", this._showTimestamps);
+        if (this._showTimestamps) {
+            for (let consoleMessageView of this._consoleMessageViews) {
+                if (consoleMessageView instanceof WI.ConsoleMessageView)
+                    consoleMessageView.renderTimestamp();
+            }
+        }
+    }
+};
+
+WI.JavaScriptLogViewController.CachedPropertiesDuration = 30_000;
+WI.JavaScriptLogViewController.IgnoredRepeatCount = Symbol("ignored-repeat-count");

inspector/Controllers/JavaScriptRuntimeCompletionProvider.js

@@ -0,0 +1,425 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+Object.defineProperty(WI, "javaScriptRuntimeCompletionProvider",
+{
+    get: function()
+    {
+        if (!WI.JavaScriptRuntimeCompletionProvider._instance)
+            WI.JavaScriptRuntimeCompletionProvider._instance = new WI.JavaScriptRuntimeCompletionProvider;
+        return WI.JavaScriptRuntimeCompletionProvider._instance;
+    }
+});
+
+WI.JavaScriptRuntimeCompletionProvider = class JavaScriptRuntimeCompletionProvider extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        console.assert(!WI.JavaScriptRuntimeCompletionProvider._instance);
+
+        this._ongoingCompletionRequests = 0;
+
+        WI.debuggerManager.addEventListener(WI.DebuggerManager.Event.ActiveCallFrameDidChange, this._clearLastProperties, this);
+    }
+
+    // Static
+
+    static get _commandLineAPIKeys()
+    {
+        if (!JavaScriptRuntimeCompletionProvider.__cachedCommandLineAPIKeys) {
+            JavaScriptRuntimeCompletionProvider.__cachedCommandLineAPIKeys = [
+                "$_",
+                "assert",
+                "clear",
+                "count",
+                "countReset",
+                "debug",
+                "dir",
+                "dirxml",
+                "error",
+                "group",
+                "groupCollapsed",
+                "groupEnd",
+                "info",
+                "inspect",
+                "keys",
+                "log",
+                "profile",
+                "profileEnd",
+                "queryHolders",
+                "queryInstances",
+                "queryObjects",
+                "record",
+                "recordEnd",
+                "screenshot",
+                "table",
+                "takeHeapSnapshot",
+                "time",
+                "timeEnd",
+                "timeLog",
+                "timeStamp",
+                "trace",
+                "values",
+                "warn",
+            ];
+        }
+        return JavaScriptRuntimeCompletionProvider.__cachedCommandLineAPIKeys;
+    }
+
+    // Protected
+
+    completionControllerCompletionsNeeded(completionController, defaultCompletions, base, prefix, suffix, forced)
+    {
+        // Don't allow non-forced empty prefix completions unless the base is that start of property access.
+        if (!forced && !prefix && !/[.[]$/.test(base)) {
+            completionController.updateCompletions(null);
+            return;
+        }
+
+        // If the base ends with an open parentheses or open curly bracket then treat it like there is
+        // no base so we get global object completions.
+        if (/[({]$/.test(base))
+            base = "";
+
+        var lastBaseIndex = base.length - 1;
+        var dotNotation = base[lastBaseIndex] === ".";
+        var bracketNotation = base[lastBaseIndex] === "[";
+
+        if (dotNotation || bracketNotation) {
+            base = base.substring(0, lastBaseIndex);
+
+            // Don't suggest anything for an empty base that is using dot notation.
+            // Bracket notation with an empty base will be treated as an array.
+            if (!base && dotNotation) {
+                completionController.updateCompletions(defaultCompletions);
+                return;
+            }
+
+            // Don't allow non-forced empty prefix completions if the user is entering a number, since it might be a float.
+            // But allow number completions if the base already has a decimal, so "10.0." will suggest Number properties.
+            if (!forced && !prefix && dotNotation && base.indexOf(".") === -1 && parseInt(base, 10) == base) {
+                completionController.updateCompletions(null);
+                return;
+            }
+
+            // An empty base with bracket notation is not property access, it is an array.
+            // Clear the bracketNotation flag so completions are not quoted.
+            if (!base && bracketNotation)
+                bracketNotation = false;
+        }
+
+        // Start an completion request. We must now decrement before calling completionController.updateCompletions.
+        this._incrementOngoingCompletionRequests();
+
+        // If the base is the same as the last time, we can reuse the property names we have already gathered.
+        // Doing this eliminates delay caused by the async nature of the code below and it only calls getters
+        // and functions once instead of repetitively. Sure, there can be difference each time the base is evaluated,
+        // but this optimization gives us more of a win. We clear the cache after 30 seconds or when stepping in the
+        // debugger to make sure we don't use stale properties in most cases.
+        if (this._lastMode === completionController.mode && this._lastBase === base && this._lastPropertyNames) {
+            receivedPropertyNames.call(this, this._lastPropertyNames);
+            return;
+        }
+
+        this._lastMode = completionController.mode;
+        this._lastBase = base;
+        this._lastPropertyNames = null;
+
+        var activeCallFrame = WI.debuggerManager.activeCallFrame;
+        if (!base && activeCallFrame && !this._alwaysEvaluateInWindowContext)
+            activeCallFrame.collectScopeChainVariableNames(receivedPropertyNames.bind(this));
+        else {
+            let options = {objectGroup: "completion", includeCommandLineAPI: true, doNotPauseOnExceptionsAndMuteConsole: true, returnByValue: false, generatePreview: false, saveResult: false};
+            WI.runtimeManager.evaluateInInspectedWindow(base, options, evaluated.bind(this));
+        }
+
+        function updateLastPropertyNames(propertyNames)
+        {
+            if (this._clearLastPropertiesTimeout)
+                clearTimeout(this._clearLastPropertiesTimeout);
+            this._clearLastPropertiesTimeout = setTimeout(this._clearLastProperties.bind(this), WI.JavaScriptLogViewController.CachedPropertiesDuration);
+
+            this._lastPropertyNames = propertyNames || [];
+        }
+
+        function evaluated(result, wasThrown)
+        {
+            if (wasThrown || !result || result.type === "undefined" || (result.type === "object" && result.subtype === "null")) {
+                this._decrementOngoingCompletionRequests();
+
+                updateLastPropertyNames.call(this, []);
+                completionController.updateCompletions(defaultCompletions);
+
+                return;
+            }
+
+            function inspectedPage_evalResult_getArrayCompletions(primitiveType)
+            {
+                var array = this;
+                var arrayLength;
+
+                var resultSet = {};
+                for (var o = array; o; o = o.__proto__) {
+                    try {
+                        if (o === array && o.length) {
+                            // If the array type has a length, don't include a list of all the indexes.
+                            // Include it at the end and the frontend can build the list.
+                            arrayLength = o.length;
+                        } else {
+                            var names = Object.getOwnPropertyNames(o);
+                            for (var i = 0; i < names.length; ++i)
+                                resultSet[names[i]] = true;
+                        }
+                    } catch { }
+                }
+
+                if (arrayLength)
+                    resultSet["length"] = arrayLength;
+
+                return resultSet;
+            }
+
+            function inspectedPage_evalResult_getCompletions(primitiveType)
+            {
+                var object;
+                if (primitiveType === "string")
+                    object = new String("");
+                else if (primitiveType === "number")
+                    object = new Number(0);
+                else if (primitiveType === "boolean")
+                    object = new Boolean(false);
+                else if (primitiveType === "symbol")
+                    object = Symbol();
+                else
+                    object = this;
+
+                var resultSet = {};
+                for (var o = object; o; o = o.__proto__) {
+                    try {
+                        var names = Object.getOwnPropertyNames(o);
+                        for (var i = 0; i < names.length; ++i)
+                            resultSet[names[i]] = true;
+                    } catch (e) { }
+                }
+
+                return resultSet;
+            }
+
+            if (result.subtype === "array")
+                result.callFunctionJSON(inspectedPage_evalResult_getArrayCompletions, undefined, receivedArrayPropertyNames.bind(this));
+            else if (result.type === "object" || result.type === "function")
+                result.callFunctionJSON(inspectedPage_evalResult_getCompletions, undefined, receivedObjectPropertyNames.bind(this));
+            else if (result.type === "string" || result.type === "number" || result.type === "boolean" || result.type === "symbol") {
+                let options = {objectGroup: "completion", includeCommandLineAPI: false, doNotPauseOnExceptionsAndMuteConsole: true, returnByValue: true, generatePreview: false, saveResult: false};
+                WI.runtimeManager.evaluateInInspectedWindow("(" + inspectedPage_evalResult_getCompletions + ")(\"" + result.type + "\")", options, receivedPropertyNamesFromEvaluate.bind(this));
+            } else
+                console.error("Unknown result type: " + result.type);
+        }
+
+        function receivedPropertyNamesFromEvaluate(object, wasThrown, result)
+        {
+            receivedPropertyNames.call(this, result && !wasThrown ? Object.keys(result.value) : null);
+        }
+
+        function receivedObjectPropertyNames(propertyNames)
+        {
+            receivedPropertyNames.call(this, Object.keys(propertyNames));
+        }
+
+        function receivedArrayPropertyNames(propertyNames)
+        {
+            if (propertyNames && typeof propertyNames.length === "number") {
+                // FIXME <https://webkit.org/b/201909> Web Inspector: autocompletion of array indexes can't handle large arrays in a performant way
+                var max = Math.min(propertyNames.length, 1000);
+                for (var i = 0; i < max; ++i)
+                    propertyNames[i] = true;
+            }
+
+            receivedObjectPropertyNames.call(this, propertyNames);
+        }
+
+        function receivedPropertyNames(propertyNames)
+        {
+            console.assert(!propertyNames || Array.isArray(propertyNames));
+            propertyNames = propertyNames || [];
+
+            updateLastPropertyNames.call(this, propertyNames);
+
+            this._decrementOngoingCompletionRequests();
+
+            if (!base) {
+                propertyNames.pushAll(JavaScriptRuntimeCompletionProvider._commandLineAPIKeys);
+
+                let savedResultAlias = WI.settings.consoleSavedResultAlias.value;
+                if (savedResultAlias)
+                    propertyNames.push(savedResultAlias + "_");
+
+                let target = WI.runtimeManager.activeExecutionContext.target;
+                let targetData = WI.debuggerManager.paused ? WI.debuggerManager.dataForTarget(target) : {};
+
+                function shouldExposeEvent() {
+                    switch (completionController.mode) {
+                    case WI.CodeMirrorCompletionController.Mode.FullConsoleCommandLineAPI:
+                    case WI.CodeMirrorCompletionController.Mode.EventBreakpoint:
+                        return true;
+                    case WI.CodeMirrorCompletionController.Mode.PausedConsoleCommandLineAPI:
+                        return targetData.pauseReason === WI.DebuggerManager.PauseReason.Listener || targetData.pauseReason === WI.DebuggerManager.PauseReason.EventListener;
+                    }
+                    return false;
+                }
+                if (shouldExposeEvent()) {
+                    propertyNames.push("$event");
+                    if (savedResultAlias)
+                        propertyNames.push(savedResultAlias + "event");
+                }
+
+                function shouldExposeException() {
+                    switch (completionController.mode) {
+                    case WI.CodeMirrorCompletionController.Mode.FullConsoleCommandLineAPI:
+                    case WI.CodeMirrorCompletionController.Mode.ExceptionBreakpoint:
+                        return true;
+                    case WI.CodeMirrorCompletionController.Mode.PausedConsoleCommandLineAPI:
+                        return targetData.pauseReason === WI.DebuggerManager.PauseReason.Exception;
+                    }
+                    return false;
+                }
+                if (shouldExposeException()) {
+                    propertyNames.push("$exception");
+                    if (savedResultAlias)
+                        propertyNames.push(savedResultAlias + "exception");
+                }
+
+                switch (target.type) {
+                case WI.TargetType.Page:
+                    propertyNames.push("$");
+                    propertyNames.push("$$");
+                    propertyNames.push("$0");
+                    if (savedResultAlias)
+                        propertyNames.push(savedResultAlias + "0");
+                    propertyNames.push("$x");
+                    // fallthrough
+                case WI.TargetType.ServiceWorker:
+                case WI.TargetType.Worker:
+                    propertyNames.push("copy");
+                    propertyNames.push("getEventListeners");
+                    propertyNames.push("monitorEvents");
+                    propertyNames.push("unmonitorEvents");
+                    break;
+                }
+
+                // FIXME: Due to caching, sometimes old $n values show up as completion results even though they are not available. We should clear that proactively.
+                for (var i = 1; i <= WI.ConsoleCommandResultMessage.maximumSavedResultIndex; ++i) {
+                    propertyNames.push("$" + i);
+                    if (savedResultAlias)
+                        propertyNames.push(savedResultAlias + i);
+                }
+            }
+
+            var implicitSuffix = "";
+            if (bracketNotation) {
+                var quoteUsed = prefix[0] === "'" ? "'" : "\"";
+                if (suffix !== "]" && suffix !== quoteUsed)
+                    implicitSuffix = "]";
+            }
+
+            var completions = defaultCompletions;
+            let knownCompletions = new Set(completions);
+
+            for (var i = 0; i < propertyNames.length; ++i) {
+                var property = propertyNames[i];
+
+                if (dotNotation && !/^[a-zA-Z_$][a-zA-Z0-9_$]*$/.test(property))
+                    continue;
+
+                if (bracketNotation) {
+                    if (parseInt(property) != property)
+                        property = quoteUsed + property.escapeCharacters(quoteUsed + "\\") + (suffix !== quoteUsed ? quoteUsed : "");
+                }
+
+                if (!property.startsWith(prefix) || knownCompletions.has(property))
+                    continue;
+
+                completions.push(property);
+                knownCompletions.add(property);
+            }
+
+            function compare(a, b)
+            {
+                // Try to sort in numerical order first.
+                let numericCompareResult = a - b;
+                if (!isNaN(numericCompareResult))
+                    return numericCompareResult;
+
+                // Sort __defineGetter__, __lookupGetter__, and friends last.
+                let aRareProperty = a.startsWith("__") && a.endsWith("__");
+                let bRareProperty = b.startsWith("__") && b.endsWith("__");
+                if (aRareProperty && !bRareProperty)
+                    return 1;
+                if (!aRareProperty && bRareProperty)
+                    return -1;
+
+                // Not numbers, sort as strings.
+                return a.extendedLocaleCompare(b);
+            }
+
+            completions.sort(compare);
+
+            completionController.updateCompletions(completions, implicitSuffix);
+        }
+    }
+
+    // Private
+
+    _incrementOngoingCompletionRequests()
+    {
+        this._ongoingCompletionRequests++;
+
+        console.assert(this._ongoingCompletionRequests <= 50, "Ongoing requests probably should not get this high. We may be missing a balancing decrement.");
+    }
+
+    _decrementOngoingCompletionRequests()
+    {
+        this._ongoingCompletionRequests--;
+
+        console.assert(this._ongoingCompletionRequests >= 0, "Unbalanced increments / decrements.");
+
+        if (this._ongoingCompletionRequests <= 0)
+            WI.runtimeManager.activeExecutionContext.target.RuntimeAgent.releaseObjectGroup("completion");
+    }
+
+    _clearLastProperties()
+    {
+        if (this._clearLastPropertiesTimeout) {
+            clearTimeout(this._clearLastPropertiesTimeout);
+            delete this._clearLastPropertiesTimeout;
+        }
+
+        // Clear the cache of property names so any changes while stepping or sitting idle get picked up if the same
+        // expression is evaluated again.
+        this._lastPropertyNames = null;
+    }
+};

inspector/Controllers/LayerTreeManager.js

@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+// FIXME: LayerTreeManager lacks advanced multi-target support. (Layers per-target)
+
+WI.LayerTreeManager = class LayerTreeManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._showPaintRects = false;
+        this._compositingBordersVisible = false;
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (target.hasDomain("LayerTree"))
+            target.LayerTreeAgent.enable();
+
+        if (target.hasDomain("Page")) {
+            if (target.hasCommand("Page.setShowPaintRects") && this._showPaintRects)
+                target.PageAgent.setShowPaintRects(this._showPaintRects);
+
+            if (this._compositingBordersVisible) {
+                // COMPATIBILITY(iOS 13.1): Page.setCompositingBordersVisible was replaced by Page.Setting.ShowDebugBorders and Page.Setting.ShowRepaintCounter.
+                if (target.hasCommand("Page.overrideSetting") && InspectorBackend.Enum.Page.Setting.ShowDebugBorders && InspectorBackend.Enum.Page.Setting.ShowRepaintCounter) {
+                    target.PageAgent.overrideSetting(InspectorBackend.Enum.Page.Setting.ShowDebugBorders, this._compositingBordersVisible);
+                    target.PageAgent.overrideSetting(InspectorBackend.Enum.Page.Setting.ShowRepaintCounter, this._compositingBordersVisible);
+                } else if (target.hasCommand("Page.setCompositingBordersVisible"))
+                    target.PageAgent.setCompositingBordersVisible(this._compositingBordersVisible);
+            }
+        }
+    }
+
+    // Static
+
+    static supportsShowingPaintRects()
+    {
+        return InspectorBackend.hasCommand("Page.setShowPaintRects");
+    }
+
+    static supportsVisibleCompositingBorders()
+    {
+        return InspectorBackend.hasCommand("Page.setCompositingBordersVisible")
+            || (InspectorBackend.hasCommand("Page.overrideSetting") && InspectorBackend.Enum.Page.Setting.ShowDebugBorders && InspectorBackend.Enum.Page.Setting.ShowRepaintCounter);
+    }
+
+    // Public
+
+    get supported()
+    {
+        return InspectorBackend.hasDomain("LayerTree");
+    }
+
+    get showPaintRects()
+    {
+        return this._showPaintRects;
+    }
+
+    set showPaintRects(showPaintRects)
+    {
+        if (this._showPaintRects === showPaintRects)
+            return;
+
+        this._showPaintRects = showPaintRects;
+
+        for (let target of WI.targets) {
+            if (target.hasCommand("Page.setShowPaintRects"))
+                target.PageAgent.setShowPaintRects(this._showPaintRects);
+        }
+
+        this.dispatchEventToListeners(LayerTreeManager.Event.ShowPaintRectsChanged);
+    }
+
+    get compositingBordersVisible()
+    {
+        return this._compositingBordersVisible;
+    }
+
+    set compositingBordersVisible(compositingBordersVisible)
+    {
+        if (this._compositingBordersVisible === compositingBordersVisible)
+            return;
+
+        this._compositingBordersVisible = compositingBordersVisible;
+
+        for (let target of WI.targets) {
+            // COMPATIBILITY(iOS 13.1): Page.setCompositingBordersVisible was replaced by Page.Setting.ShowDebugBorders and Page.Setting.ShowRepaintCounter.
+            if (target.hasCommand("Page.overrideSetting") && InspectorBackend.Enum.Page.Setting.ShowDebugBorders && InspectorBackend.Enum.Page.Setting.ShowRepaintCounter) {
+                target.PageAgent.overrideSetting(InspectorBackend.Enum.Page.Setting.ShowDebugBorders, this._compositingBordersVisible);
+                target.PageAgent.overrideSetting(InspectorBackend.Enum.Page.Setting.ShowRepaintCounter, this._compositingBordersVisible);
+            } else if (target.hasCommand("Page.setCompositingBordersVisible"))
+                target.PageAgent.setCompositingBordersVisible(this._compositingBordersVisible);
+        }
+
+        this.dispatchEventToListeners(LayerTreeManager.Event.CompositingBordersVisibleChanged);
+    }
+
+    updateCompositingBordersVisibleFromPageIfNeeded()
+    {
+        if (!WI.targetsAvailable()) {
+            WI.whenTargetsAvailable().then(() => {
+                this.updateCompositingBordersVisibleFromPageIfNeeded();
+            });
+            return;
+        }
+
+        let target = WI.assumingMainTarget();
+
+        // COMPATIBILITY(iOS 13.1): Page.getCompositingBordersVisible was replaced by Page.Setting.ShowDebugBorders and Page.Setting.ShowRepaintCounter.
+        if (!target.hasCommand("Page.getCompositingBordersVisible"))
+            return;
+
+        target.PageAgent.getCompositingBordersVisible((error, compositingBordersVisible) => {
+            if (error) {
+                WI.reportInternalError(error);
+                return;
+            }
+
+            this.compositingBordersVisible = compositingBordersVisible;
+        });
+    }
+
+    layerTreeMutations(previousLayers, newLayers)
+    {
+        console.assert(this.supported);
+
+        if (isEmptyObject(previousLayers))
+            return {preserved: [], additions: newLayers, removals: []};
+
+        let previousLayerIds = new Set;
+        let newLayerIds = new Set;
+
+        let preserved = [];
+        let additions = [];
+
+        for (let layer of previousLayers)
+            previousLayerIds.add(layer.layerId);
+
+        for (let layer of newLayers) {
+            newLayerIds.add(layer.layerId);
+
+            if (previousLayerIds.has(layer.layerId))
+                preserved.push(layer);
+            else
+                additions.push(layer);
+        }
+
+        let removals = previousLayers.filter((layer) => !newLayerIds.has(layer.layerId));
+
+        return {preserved, additions, removals};
+    }
+
+    layersForNode(node, callback)
+    {
+        console.assert(this.supported);
+
+        let target = WI.assumingMainTarget();
+        target.LayerTreeAgent.layersForNode(node.id, (error, layers) => {
+            callback(error ? [] : layers.map(WI.Layer.fromPayload));
+        });
+    }
+
+    reasonsForCompositingLayer(layer, callback)
+    {
+        console.assert(this.supported);
+
+        let target = WI.assumingMainTarget();
+        target.LayerTreeAgent.reasonsForCompositingLayer(layer.layerId, function(error, reasons) {
+            callback(error ? 0 : reasons);
+        });
+    }
+
+    // LayerTreeObserver
+
+    layerTreeDidChange()
+    {
+        this.dispatchEventToListeners(WI.LayerTreeManager.Event.LayerTreeDidChange);
+    }
+};
+
+WI.LayerTreeManager.Event = {
+    ShowPaintRectsChanged: "show-paint-rects-changed",
+    CompositingBordersVisibleChanged: "compositing-borders-visible-changed",
+    LayerTreeDidChange: "layer-tree-did-change",
+};

inspector/Controllers/MemoryManager.js

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.MemoryManager = class MemoryManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._enabled = false;
+    }
+
+    // Agent
+
+    get domains() { return ["Memory"]; }
+
+    activateExtraDomain(domain)
+    {
+        // COMPATIBILITY (iOS 14.0): Inspector.activateExtraDomains was removed in favor of a declared debuggable type
+
+        console.assert(domain === "Memory");
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (!this._enabled)
+            return;
+
+        if (target.hasDomain("Memory"))
+            target.MemoryAgent.enable();
+    }
+
+    // Public
+
+    enable()
+    {
+        if (this._enabled)
+            return;
+
+        this._enabled = true;
+
+        for (let target of WI.targets)
+            this.initializeTarget(target);
+    }
+
+    disable()
+    {
+        if (!this._enabled)
+            return;
+
+        for (let target of WI.targets) {
+            if (target.hasDomain("Memory"))
+                target.MemoryAgent.disable();
+        }
+
+        this._enabled = false;
+    }
+
+    // MemoryObserver
+
+    memoryPressure(timestamp, protocolSeverity)
+    {
+        if (!this._enabled)
+            return;
+
+        let memoryPressureEvent = WI.MemoryPressureEvent.fromPayload(timestamp, protocolSeverity);
+        this.dispatchEventToListeners(WI.MemoryManager.Event.MemoryPressure, {memoryPressureEvent});
+    }
+};
+
+WI.MemoryManager.Event = {
+    MemoryPressure: "memory-manager-memory-pressure",
+};

inspector/Controllers/QueryController.js

@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.QueryController = class QueryController
+{
+    // Public
+
+    executeQuery(query)
+    {
+        throw WI.NotImplementedError.subclassMustOverride();
+    }
+
+    findQueryMatches(query, searchString, specialCharacterIndices)
+    {
+        if (query.length > searchString.length)
+            return [];
+
+        let matches = [];
+        let queryIndex = 0;
+        let searchIndex = 0;
+        let specialIndex = 0;
+        let deadBranches = (new Array(query.length)).fill(Infinity);
+        let type = WI.QueryMatch.Type.Special;
+
+        function pushMatch(index) {
+            matches.push(new WI.QueryMatch(type, index, queryIndex));
+            searchIndex = index + 1;
+            queryIndex++;
+        }
+
+        function matchNextSpecialCharacter() {
+            if (specialIndex >= specialCharacterIndices.length)
+                return false;
+
+            let originalSpecialIndex = specialIndex;
+            while (specialIndex < specialCharacterIndices.length) {
+                // Normal character matching can move past special characters,
+                // so advance the special character index if it's before the
+                // current search string position.
+                let index = specialCharacterIndices[specialIndex++];
+                if (index < searchIndex)
+                    continue;
+
+                if (query[queryIndex] === searchString[index]) {
+                    pushMatch(index);
+                    return true;
+                }
+            }
+
+            specialIndex = originalSpecialIndex;
+            return false;
+        }
+
+        function backtrack() {
+            while (matches.length) {
+                queryIndex--;
+
+                let lastMatch = matches.pop();
+                if (lastMatch.type !== WI.QueryMatch.Type.Special)
+                    continue;
+
+                deadBranches[lastMatch.queryIndex] = lastMatch.index;
+                searchIndex = matches.lastValue ? matches.lastValue.index + 1 : 0;
+                return true;
+            }
+
+            return false;
+        }
+
+        while (queryIndex < query.length && searchIndex <= searchString.length) {
+            if (type === WI.QueryMatch.Type.Special && !matchNextSpecialCharacter())
+                type = WI.QueryMatch.Type.Normal;
+
+            if (type === WI.QueryMatch.Type.Normal) {
+                let index = searchString.indexOf(query[queryIndex], searchIndex);
+                if (index >= 0 && index < deadBranches[queryIndex]) {
+                    pushMatch(index);
+                    type = WI.QueryMatch.Type.Special;
+                } else if (!backtrack())
+                    return [];
+            }
+        }
+
+        if (queryIndex < query.length)
+            return [];
+
+        return matches;
+    }
+
+    // Protected
+
+    findSpecialCharacterIndices(string, separators)
+    {
+        if (!string.length)
+            return [];
+
+        // Special characters include the following:
+        // - The first character.
+        // - Uppercase characters that follow a lowercase letter.
+        // - Separators and the first character following the separator.
+
+        let indices = [0];
+
+        for (let i = 1; i < string.length; ++i) {
+            let character = string[i];
+            let isSpecial = false;
+
+            if (separators.includes(character))
+                isSpecial = true;
+            else {
+                let previousCharacter = string[i - 1];
+                if (separators.includes(previousCharacter))
+                    isSpecial = true;
+                else if (character.isUpperCase() && previousCharacter.isLowerCase())
+                    isSpecial = true;
+            }
+
+            if (isSpecial)
+                indices.push(i);
+        }
+
+        return indices;
+    }
+};

inspector/Controllers/ResourceQueryController.js

@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ResourceQueryController = class ResourceQueryController extends WI.QueryController
+{
+    constructor()
+    {
+        super();
+
+        this._resourceDataMap = new Map;
+    }
+
+    // Public
+
+    addResource(resource)
+    {
+        this._resourceDataMap.set(resource, {});
+    }
+
+    removeResource(resource)
+    {
+        this._resourceDataMap.delete(resource);
+    }
+
+    reset()
+    {
+        this._resourceDataMap.clear();
+    }
+
+    executeQuery(query)
+    {
+        if (!query || !this._resourceDataMap.size)
+            return [];
+
+        query = query.removeWhitespace().toLowerCase();
+
+        let cookie = null;
+        if (query.includes(":")) {
+            let [newQuery, lineNumber, columnNumber] = query.split(":");
+            query = newQuery;
+            lineNumber = lineNumber ? parseInt(lineNumber, 10) - 1 : 0;
+            columnNumber = columnNumber ? parseInt(columnNumber, 10) - 1 : 0;
+            cookie = {lineNumber, columnNumber};
+        }
+
+        let results = [];
+        for (let [resource, cachedData] of this._resourceDataMap) {
+            if (isEmptyObject(cachedData)) {
+                let displayName = resource.displayName;
+                cachedData.displayName = {
+                    searchString: displayName.toLowerCase(),
+                    specialCharacterIndices: this._findSpecialCharacterIndicesInDisplayName(displayName),
+                };
+
+                let url = resource.url;
+                cachedData.url = {
+                    searchString: url.toLowerCase(),
+                    specialCharacterIndices: this._findSpecialCharacterIndicesInURL(url),
+                };
+            }
+
+            let resourceResult = null;
+
+            let findQueryMatches = ({searchString, specialCharacterIndices}) => {
+                let matches = this.findQueryMatches(query, searchString, specialCharacterIndices);
+                if (!matches.length)
+                    return;
+
+                let queryResult = new WI.ResourceQueryResult(resource, searchString, matches, cookie);
+                if (!resourceResult || resourceResult.rank < queryResult.rank)
+                    resourceResult = queryResult;
+            };
+            findQueryMatches(cachedData.displayName);
+            findQueryMatches(cachedData.url);
+
+            if (resourceResult)
+                results.push(resourceResult);
+        }
+
+        // Resources are sorted in descending order by rank. Resources of equal
+        // rank are sorted by display name.
+        return results.sort((a, b) => {
+            if (a.rank === b.rank)
+                return a.resource.displayName.extendedLocaleCompare(b.resource.displayName);
+            return b.rank - a.rank;
+        });
+    }
+
+    // Private
+
+    _findSpecialCharacterIndicesInDisplayName(displayName)
+    {
+        return this.findSpecialCharacterIndices(displayName, "_.-");
+    }
+
+    _findSpecialCharacterIndicesInURL(url)
+    {
+        return this.findSpecialCharacterIndices(url, "_.-/");
+    }
+};

inspector/Controllers/RuntimeManager.js

@@ -0,0 +1,291 @@
+/*
+ * Copyright (C) 2013 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.RuntimeManager = class RuntimeManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._activeExecutionContext = null;
+
+        WI.settings.consoleSavedResultAlias.addEventListener(WI.Setting.Event.Changed, function(event) {
+            for (let target of WI.targets) {
+                // COMPATIBILITY (iOS 12.2): Runtime.setSavedResultAlias did not exist.
+                if (target.hasCommand("Runtime.setSavedResultAlias"))
+                    target.RuntimeAgent.setSavedResultAlias(WI.settings.consoleSavedResultAlias.value);
+            }
+        }, this);
+    }
+
+    // Static
+
+    static supportsAwaitPromise()
+    {
+        // COMPATIBILITY (iOS 12): Runtime.awaitPromise did not exist.
+        return InspectorBackend.hasCommand("Runtime.awaitPromise");
+    }
+
+    static preferredSavedResultPrefix()
+    {
+        // COMPATIBILITY (iOS 12.2): Runtime.setSavedResultAlias did not exist.
+        if (!InspectorBackend.hasCommand("Runtime.setSavedResultAlias"))
+            return "$";
+        return WI.settings.consoleSavedResultAlias.value || "$";
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        target.RuntimeAgent.enable();
+
+        if (WI.settings.showJavaScriptTypeInformation.value)
+            target.RuntimeAgent.enableTypeProfiler();
+
+        if (WI.settings.enableControlFlowProfiler.value)
+            target.RuntimeAgent.enableControlFlowProfiler();
+
+        // COMPATIBILITY (iOS 12.2): Runtime.setSavedResultAlias did not exist.
+        if (target.hasCommand("Runtime.setSavedResultAlias") && WI.settings.consoleSavedResultAlias.value)
+            target.RuntimeAgent.setSavedResultAlias(WI.settings.consoleSavedResultAlias.value);
+    }
+
+    // Public
+
+    get activeExecutionContext()
+    {
+        return this._activeExecutionContext;
+    }
+
+    set activeExecutionContext(executionContext)
+    {
+        if (this._activeExecutionContext === executionContext)
+            return;
+
+        this._activeExecutionContext = executionContext;
+
+        this.dispatchEventToListeners(WI.RuntimeManager.Event.ActiveExecutionContextChanged);
+    }
+
+    evaluateInInspectedWindow(expression, options, callback)
+    {
+        if (!this._activeExecutionContext) {
+            callback(null, false);
+            return;
+        }
+
+        let {objectGroup, includeCommandLineAPI, doNotPauseOnExceptionsAndMuteConsole, returnByValue, generatePreview, saveResult, emulateUserGesture, sourceURLAppender} = options;
+
+        includeCommandLineAPI = includeCommandLineAPI || false;
+        doNotPauseOnExceptionsAndMuteConsole = doNotPauseOnExceptionsAndMuteConsole || false;
+        returnByValue = returnByValue || false;
+        generatePreview = generatePreview || false;
+        saveResult = saveResult || false;
+        emulateUserGesture = emulateUserGesture || false;
+        sourceURLAppender = sourceURLAppender || appendWebInspectorSourceURL;
+
+        console.assert(objectGroup, "RuntimeManager.evaluateInInspectedWindow should always be called with an objectGroup");
+        console.assert(typeof sourceURLAppender === "function");
+
+        if (!expression) {
+            // There is no expression, so the completion should happen against global properties.
+            expression = "this";
+        } else if (/^\s*\{/.test(expression) && /\}\s*$/.test(expression)) {
+            // Transform {a:1} to ({a:1}) so it is treated like an object literal instead of a block with a label.
+            expression = "(" + expression + ")";
+        } else if (/\bawait\b/.test(expression)) {
+            // Transform `await <expr>` into an async function assignment.
+            expression = this._tryApplyAwaitConvenience(expression);
+        }
+
+        expression = sourceURLAppender(expression);
+
+        let target = this._activeExecutionContext.target;
+        let executionContextId = this._activeExecutionContext.id;
+
+        if (WI.debuggerManager.activeCallFrame) {
+            target = WI.debuggerManager.activeCallFrame.target;
+            executionContextId = target.executionContext.id;
+        }
+
+        function evalCallback(error, result, wasThrown, savedResultIndex)
+        {
+            this.dispatchEventToListeners(WI.RuntimeManager.Event.DidEvaluate, {objectGroup});
+
+            if (error) {
+                console.error(error);
+                callback(null, false);
+                return;
+            }
+
+            if (returnByValue)
+                callback(null, wasThrown, wasThrown ? null : result, savedResultIndex);
+            else
+                callback(WI.RemoteObject.fromPayload(result, target), wasThrown, savedResultIndex);
+        }
+
+        if (WI.debuggerManager.activeCallFrame) {
+            target.DebuggerAgent.evaluateOnCallFrame.invoke({
+                callFrameId: WI.debuggerManager.activeCallFrame.id,
+                expression,
+                objectGroup,
+                includeCommandLineAPI,
+                doNotPauseOnExceptionsAndMuteConsole,
+                returnByValue,
+                generatePreview,
+                saveResult,
+                emulateUserGesture, // COMPATIBILITY (iOS 13): "emulateUserGesture" did not exist yet.
+            }, evalCallback.bind(this));
+            return;
+        }
+
+        target.RuntimeAgent.evaluate.invoke({
+            expression,
+            objectGroup,
+            includeCommandLineAPI,
+            doNotPauseOnExceptionsAndMuteConsole,
+            contextId: executionContextId,
+            returnByValue,
+            generatePreview,
+            saveResult,
+            emulateUserGesture, // COMPATIBILITY (iOS 12.2): "emulateUserGesture" did not exist yet.
+        }, evalCallback.bind(this));
+    }
+
+    saveResult(remoteObject, callback)
+    {
+        console.assert(remoteObject instanceof WI.RemoteObject);
+
+        let target = this._activeExecutionContext.target;
+        let executionContextId = this._activeExecutionContext.id;
+
+        function mycallback(error, savedResultIndex)
+        {
+            callback(savedResultIndex);
+        }
+
+        if (remoteObject.objectId)
+            target.RuntimeAgent.saveResult(remoteObject.asCallArgument(), mycallback);
+        else
+            target.RuntimeAgent.saveResult(remoteObject.asCallArgument(), executionContextId, mycallback);
+    }
+
+    // Private
+
+    _tryApplyAwaitConvenience(originalExpression)
+    {
+        let esprimaSyntaxTree;
+
+        // Do not transform if the original code parses just fine.
+        try {
+            esprima.parse(originalExpression);
+            return originalExpression;
+        } catch { }
+
+        // Do not transform if the async function version does not parse.
+        try {
+            esprimaSyntaxTree = esprima.parse("(async function(){" + originalExpression + "})");
+        } catch {
+            return originalExpression;
+        }
+
+        // Assert expected AST produced by our wrapping code.
+        console.assert(esprimaSyntaxTree.type === "Program");
+        console.assert(esprimaSyntaxTree.body.length === 1);
+        console.assert(esprimaSyntaxTree.body[0].type === "ExpressionStatement");
+        console.assert(esprimaSyntaxTree.body[0].expression.type === "FunctionExpression");
+        console.assert(esprimaSyntaxTree.body[0].expression.async);
+        console.assert(esprimaSyntaxTree.body[0].expression.body.type === "BlockStatement");
+
+        // Do not transform if there is more than one statement.
+        let asyncFunctionBlock = esprimaSyntaxTree.body[0].expression.body;
+        if (asyncFunctionBlock.body.length !== 1)
+            return originalExpression;
+
+        // Extract the variable name for transformation.
+        let variableName;
+        let anonymous = false;
+        let declarationKind = "var";
+        let awaitPortion;
+        let statement = asyncFunctionBlock.body[0];
+        if (statement.type === "ExpressionStatement"
+            && statement.expression.type === "AwaitExpression") {
+            // await <expr>
+            anonymous = true;
+        } else if (statement.type === "ExpressionStatement"
+            && statement.expression.type === "AssignmentExpression"
+            && statement.expression.right.type === "AwaitExpression"
+            && statement.expression.left.type === "Identifier") {
+            // x = await <expr>
+            variableName = statement.expression.left.name;
+            awaitPortion = originalExpression.substring(originalExpression.indexOf("await"));
+        } else if (statement.type === "VariableDeclaration"
+            && statement.declarations.length === 1
+            && statement.declarations[0].init.type === "AwaitExpression"
+            && statement.declarations[0].id.type === "Identifier") {
+            // var x = await <expr>
+            variableName = statement.declarations[0].id.name;
+            declarationKind = statement.kind;
+            awaitPortion = originalExpression.substring(originalExpression.indexOf("await"));
+        } else {
+            // Do not transform if this was not one of the simple supported syntaxes.
+            return originalExpression;
+        }
+
+        if (anonymous) {
+            return `
+(async function() {
+    try {
+        let result = ${originalExpression};
+        console.info("%o", result);
+    } catch (e) {
+        console.error(e);
+    }
+})();
+undefined`;
+        }
+
+        return `${declarationKind} ${variableName};
+(async function() {
+    try {
+        ${variableName} = ${awaitPortion};
+        console.info("%o", ${variableName});
+    } catch (e) {
+        console.error(e);
+    }
+})();
+undefined;`;
+    }
+};
+
+WI.RuntimeManager.ConsoleObjectGroup = "console";
+WI.RuntimeManager.TopLevelExecutionContextIdentifier = undefined;
+
+WI.RuntimeManager.Event = {
+    DidEvaluate: "runtime-manager-did-evaluate",
+    DefaultExecutionContextChanged: "runtime-manager-default-execution-context-changed",
+    ActiveExecutionContextChanged: "runtime-manager-active-execution-context-changed",
+};

inspector/Controllers/SelectionController.js

@@ -0,0 +1,499 @@
+/*
+ * Copyright (C) 2018, 2019 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.SelectionController = class SelectionController extends WI.Object
+{
+    constructor(delegate, comparator)
+    {
+        super();
+
+        console.assert(delegate);
+        console.assert(typeof comparator === "function");
+
+        this._delegate = delegate;
+        this._comparator = comparator;
+
+        this._allowsEmptySelection = true;
+        this._allowsMultipleSelection = false;
+        this._lastSelectedItem = null;
+        this._shiftAnchorItem = null;
+        this._selectedItems = new Set;
+        this._suppressSelectionDidChange = false;
+
+        console.assert(this._delegate.selectionControllerFirstSelectableItem, "SelectionController delegate must implement selectionControllerFirstSelectableItem.");
+        console.assert(this._delegate.selectionControllerLastSelectableItem, "SelectionController delegate must implement selectionControllerLastSelectableItem.");
+        console.assert(this._delegate.selectionControllerNextSelectableItem, "SelectionController delegate must implement selectionControllerNextSelectableItem.");
+        console.assert(this._delegate.selectionControllerPreviousSelectableItem, "SelectionController delegate must implement selectionControllerPreviousSelectableItem.");
+    }
+
+    // Static
+
+    static createTreeComparator(itemForRepresentedObject)
+    {
+        return (a, b) => {
+            a = itemForRepresentedObject(a);
+            b = itemForRepresentedObject(b);
+            if (!a || !b)
+                return 0;
+
+            let getLevel = (item) => {
+                let level = 0;
+                while (item = item.parent)
+                    level++;
+                return level;
+            };
+
+            let compareSiblings = (s, t) => {
+                return s.parent.children.indexOf(s) - s.parent.children.indexOf(t);
+            };
+
+            if (a.parent === b.parent)
+                return compareSiblings(a, b);
+
+            let aLevel = getLevel(a);
+            let bLevel = getLevel(b);
+            while (aLevel > bLevel) {
+                if (a.parent === b)
+                    return 1;
+                a = a.parent;
+                aLevel--;
+            }
+            while (bLevel > aLevel) {
+                if (b.parent === a)
+                    return -1;
+                b = b.parent;
+                bLevel--;
+            }
+
+            while (a.parent !== b.parent) {
+                a = a.parent;
+                b = b.parent;
+            }
+
+            console.assert(a.parent === b.parent, "Missing common ancestor.", a, b);
+            return compareSiblings(a, b);
+        };
+    }
+
+    static createListComparator(indexForRepresentedObject)
+    {
+        console.assert(indexForRepresentedObject);
+
+        return (a, b) => {
+            return indexForRepresentedObject(a) - indexForRepresentedObject(b);
+        };
+    }
+
+    // Public
+
+    get delegate() { return this._delegate; }
+    get lastSelectedItem() { return this._lastSelectedItem; }
+    get selectedItems() { return this._selectedItems; }
+
+    get allowsEmptySelection() { return this._allowsEmptySelection; }
+    set allowsEmptySelection(flag) { this._allowsEmptySelection = flag; }
+
+    get allowsMultipleSelection()
+    {
+        return this._allowsMultipleSelection;
+    }
+
+    set allowsMultipleSelection(flag)
+    {
+        if (this._allowsMultipleSelection === flag)
+            return;
+
+        this._allowsMultipleSelection = flag;
+        if (this._allowsMultipleSelection)
+            return;
+
+        if (this._selectedItems.size > 1)
+            this._updateSelectedItems(new Set([this._lastSelectedItem]));
+    }
+
+    hasSelectedItem(item)
+    {
+        return this._selectedItems.has(item);
+    }
+
+    selectItem(item, extendSelection = false)
+    {
+        console.assert(item, "Invalid item for selection.");
+        console.assert(!extendSelection || this._allowsMultipleSelection, "Cannot extend selection with multiple selection disabled.");
+
+        if (!this._allowsMultipleSelection)
+            extendSelection = false;
+
+        this._lastSelectedItem = item;
+        this._shiftAnchorItem = null;
+
+        let newItems = new Set(extendSelection ? this._selectedItems : null);
+        newItems.add(item);
+
+        this._updateSelectedItems(newItems);
+    }
+
+    selectItems(items)
+    {
+        console.assert(this._allowsMultipleSelection, "Cannot select multiple items with multiple selection disabled.");
+        if (!this._allowsMultipleSelection)
+            return;
+
+        if (!this._lastSelectedItem || !items.has(this._lastSelectedItem))
+            this._lastSelectedItem = items.lastValue;
+
+        if (!this._shiftAnchorItem || !items.has(this._shiftAnchorItem))
+            this._shiftAnchorItem = this._lastSelectedItem;
+
+        this._updateSelectedItems(items);
+    }
+
+    deselectItem(item)
+    {
+        console.assert(item, "Invalid item for selection.");
+
+        if (!this.hasSelectedItem(item))
+            return;
+
+        if (!this._allowsEmptySelection && this._selectedItems.size === 1)
+            return;
+
+        let newItems = new Set(this._selectedItems);
+        newItems.delete(item);
+
+        if (this._lastSelectedItem === item) {
+            this._lastSelectedItem = null;
+
+            if (newItems.size) {
+                console.assert(this._allowsMultipleSelection);
+
+                const operation = WI.SelectionController.Operation.Extend;
+
+                // Find selected item closest to deselected item.
+                let previous = item;
+                let next = item;
+                while (!this._lastSelectedItem && previous && next) {
+                    previous = this._previousSelectableItem(previous, operation);
+                    if (this.hasSelectedItem(previous)) {
+                        this._lastSelectedItem = previous;
+                        break;
+                    }
+
+                    next = this._nextSelectableItem(next, operation);
+                    if (this.hasSelectedItem(next)) {
+                        this._lastSelectedItem = next;
+                        break;
+                    }
+                }
+            }
+        }
+
+        if (this._shiftAnchorItem === item)
+            this._shiftAnchorItem = null;
+
+        this._updateSelectedItems(newItems);
+    }
+
+    selectAll()
+    {
+        if (!this._allowsMultipleSelection)
+            return;
+
+        const operation = WI.SelectionController.Operation.Extend;
+
+        let newItems = new Set;
+        this._addRange(newItems, this._firstSelectableItem(operation), this._lastSelectableItem(operation));
+        this.selectItems(newItems);
+    }
+
+    deselectAll()
+    {
+        this._deselectAllAndSelect(null);
+    }
+
+    removeSelectedItems()
+    {
+        if (!this._selectedItems.size)
+            return;
+
+        let operation = this._allowsMultipleSelection ? WI.SelectionController.Operation.Extend : WI.SelectionController.Operation.Direct;
+
+        let orderedSelection = Array.from(this._selectedItems).sort(this._comparator);
+
+        // Try selecting the item preceding the selection.
+        let firstSelectedItem = orderedSelection[0];
+        let itemToSelect = this._previousSelectableItem(firstSelectedItem, operation);
+        if (!itemToSelect) {
+            // If no item exists before the first item in the selection, try selecting
+            // a deselected item (hole) within the selection.
+            itemToSelect = firstSelectedItem;
+            while (itemToSelect && this.hasSelectedItem(itemToSelect))
+                itemToSelect = this._nextSelectableItem(itemToSelect, operation);
+
+            if (!itemToSelect || this.hasSelectedItem(itemToSelect)) {
+                // If the selection contains no holes, try selecting the item
+                // following the selection.
+                itemToSelect = this._nextSelectableItem(orderedSelection.lastValue, operation);
+            }
+        }
+
+        this._deselectAllAndSelect(itemToSelect);
+    }
+
+    reset()
+    {
+        this._lastSelectedItem = null;
+        this._shiftAnchorItem = null;
+        this._selectedItems.clear();
+    }
+
+    didRemoveItems(items)
+    {
+        console.assert(items instanceof Set);
+
+        if (!items.size || !this._selectedItems.size)
+           return;
+
+        this._updateSelectedItems(this._selectedItems.difference(items));
+    }
+
+    handleKeyDown(event)
+    {
+        if (event.key === "a" && event.commandOrControlKey) {
+            this.selectAll();
+            return true;
+        }
+
+        if (event.metaKey || event.ctrlKey)
+            return false;
+
+        if (event.keyIdentifier === "Up" || event.keyIdentifier === "Down") {
+            this._selectItemsFromArrowKey(event.keyIdentifier === "Up", event.shiftKey);
+
+            event.preventDefault();
+            event.stopPropagation();
+            return true;
+        }
+
+        return false;
+    }
+
+    handleItemMouseDown(item, event)
+    {
+        console.assert(item, "Invalid item for selection.");
+
+        if (event.button !== 0 || event.ctrlKey)
+            return;
+
+        // Command (macOS) or Control (Windows) key takes precedence over shift
+        // whether or not multiple selection is enabled, so handle it first.
+        if (event.commandOrControlKey) {
+            if (this.hasSelectedItem(item))
+                this.deselectItem(item);
+            else
+                this.selectItem(item, this._allowsMultipleSelection);
+            return;
+        }
+
+        let shiftExtendSelection = this._allowsMultipleSelection && event.shiftKey;
+        if (!shiftExtendSelection) {
+            this.selectItem(item);
+            return;
+        }
+
+        let newItems = new Set(this._selectedItems);
+
+        // Shift-clicking when nothing is selected should cause the first item
+        // through the clicked item to be selected.
+        if (!newItems.size) {
+            this._lastSelectedItem = item;
+            this._shiftAnchorItem = this._firstSelectableItem(WI.SelectionController.Operation.Extend);
+
+            this._addRange(newItems, this._shiftAnchorItem, this._lastSelectedItem);
+            this._updateSelectedItems(newItems);
+            return;
+        }
+
+        if (!this._shiftAnchorItem)
+            this._shiftAnchorItem = this._lastSelectedItem;
+
+        // Shift-clicking will add to or delete from the current selection, or
+        // pivot the selection around the anchor (a delete followed by an add).
+        // We could check for all three cases, and add or delete only those items
+        // that are necessary, but it is simpler to throw out the previous shift-
+        // selected range and add the new range between the anchor and clicked item.
+
+        let sortItemPair = (a, b) => {
+            return [a, b].sort(this._comparator);
+        };
+
+        if (this._shiftAnchorItem !== this._lastSelectedItem) {
+            let [startItem, endItem] = sortItemPair(this._shiftAnchorItem, this._lastSelectedItem);
+            this._deleteRange(newItems, startItem, endItem);
+        }
+
+        let [startItem, endItem] = sortItemPair(this._shiftAnchorItem, item);
+        this._addRange(newItems, startItem, endItem);
+
+        this._lastSelectedItem = item;
+
+        this._updateSelectedItems(newItems);
+    }
+
+    // Private
+
+    _deselectAllAndSelect(item)
+    {
+        if (!this._selectedItems.size && !item)
+            return;
+
+        if (this._selectedItems.size === 1 && this.hasSelectedItem(item))
+            return;
+
+        this._lastSelectedItem = item;
+        this._shiftAnchorItem = null;
+
+        let newItems = new Set;
+        if (item)
+            newItems.add(item);
+
+        this._updateSelectedItems(newItems);
+    }
+
+    _selectItemsFromArrowKey(goingUp, shiftKey)
+    {
+        let extendSelection = shiftKey && this._allowsMultipleSelection;
+        let operation = extendSelection ? WI.SelectionController.Operation.Extend : WI.SelectionController.Operation.Direct;
+
+        if (!this._selectedItems.size) {
+            this.selectItem(goingUp ? this._lastSelectableItem(operation) : this._firstSelectableItem(operation));
+            return;
+        }
+
+        let item = goingUp ? this._previousSelectableItem(this._lastSelectedItem, operation) : this._nextSelectableItem(this._lastSelectedItem, operation);
+        if (!item)
+            return;
+
+        if (!extendSelection || !this.hasSelectedItem(item)) {
+            this.selectItem(item, extendSelection);
+            return;
+        }
+
+        // Since the item in the direction of movement is selected, we are either
+        // extending the selection into the item, or deselecting. Determine which
+        // by checking whether the item opposite the anchor item is selected.
+        let priorItem = goingUp ? this._nextSelectableItem(this._lastSelectedItem, operation) : this._previousSelectableItem(this._lastSelectedItem, operation);
+        if (!priorItem || !this.hasSelectedItem(priorItem)) {
+            this.deselectItem(this._lastSelectedItem);
+            return;
+        }
+
+        // The selection is being extended into the item; make it the new
+        // anchor item then continue searching in the direction of movement
+        // for an unselected item to select.
+        while (item) {
+            if (!this.hasSelectedItem(item)) {
+                this.selectItem(item, extendSelection);
+                break;
+            }
+
+            this._lastSelectedItem = item;
+            item = goingUp ? this._previousSelectableItem(item, operation) : this._nextSelectableItem(item, operation);
+        }
+    }
+
+    _firstSelectableItem(operation)
+    {
+        return this._delegate.selectionControllerFirstSelectableItem(this, operation);
+    }
+
+    _lastSelectableItem(operation)
+    {
+        return this._delegate.selectionControllerLastSelectableItem(this, operation);
+    }
+
+    _previousSelectableItem(item, operation)
+    {
+        return this._delegate.selectionControllerPreviousSelectableItem(this, item, operation);
+    }
+
+    _nextSelectableItem(item, operation)
+    {
+        return this._delegate.selectionControllerNextSelectableItem(this, item, operation);
+    }
+
+    _updateSelectedItems(items)
+    {
+        let oldSelectedItems = this._selectedItems;
+        this._selectedItems = items;
+
+        if (this._suppressSelectionDidChange || !this._delegate.selectionControllerSelectionDidChange)
+            return;
+
+        let deselectedItems = oldSelectedItems.difference(items);
+        let selectedItems = items.difference(oldSelectedItems);
+        if (deselectedItems.size || selectedItems.size)
+            this._delegate.selectionControllerSelectionDidChange(this, deselectedItems, selectedItems);
+    }
+
+    _addRange(items, firstItem, lastItem)
+    {
+        console.assert(this._allowsMultipleSelection);
+
+        const operation = WI.SelectionController.Operation.Extend;
+
+        let current = firstItem;
+        while (current) {
+            items.add(current);
+            if (current === lastItem)
+                break;
+            current = this._nextSelectableItem(current, operation);
+        }
+
+        console.assert(!lastItem || items.has(lastItem), "End of range could not be reached.");
+    }
+
+    _deleteRange(items, firstItem, lastItem)
+    {
+        console.assert(this._allowsMultipleSelection);
+
+        const operation = WI.SelectionController.Operation.Extend;
+
+        let current = firstItem;
+        while (current) {
+            items.delete(current);
+            if (current === lastItem)
+                break;
+            current = this._nextSelectableItem(current, operation);
+        }
+
+        console.assert(!lastItem || !items.has(lastItem), "End of range could not be reached.");
+    }
+};
+
+WI.SelectionController.Operation = {
+    Direct: Symbol("selection-operation-direct"),
+    Extend: Symbol("selection-operation-extend"),
+};

inspector/Controllers/StackTraceTreeController.js

@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.StackTraceTreeController = class StackTraceTreeController extends WI.Object
+{
+    constructor(treeOutline)
+    {
+        console.assert(treeOutline instanceof WI.TreeOutline);
+
+        super();
+
+        this._stackTrace = null;
+
+        this._treeOutline = treeOutline;
+
+        if (this._treeOutline.selectable)
+            this._treeOutline.addEventListener(WI.TreeOutline.Event.SelectionDidChange, this._treeSelectionDidChange, this);
+        else
+            this._treeOutline.addEventListener(WI.TreeOutline.Event.ElementClicked, this._treeElementClicked, this);
+    }
+
+    // Static
+
+    static groupBlackboxedStackTrace(parent, stackTrace, {rememberBlackboxedCallFrameGroupToAutoExpand} = {})
+    {
+        let parentIsNode = parent instanceof Node;
+        console.assert(parentIsNode || parent instanceof WI.TreeOutline || parent instanceof WI.TreeElement, parent);
+        console.assert(stackTrace instanceof WI.StackTrace, stackTrace);
+
+        let CallFrameUIClass = parentIsNode ? WI.CallFrameView : WI.CallFrameTreeElement;
+
+        let activeCallFrameTreeElement = WI.StackTraceTreeController._groupBlackboxedCallFrames(parent, stackTrace.callFrames, {rememberBlackboxedCallFrameGroupToAutoExpand});
+
+        let parentStackTrace = stackTrace.parentStackTrace;
+        while (parentStackTrace) {
+            console.assert(parentStackTrace.callFrames.length, "StackTrace should have non-empty call frames array.");
+            if (!parentStackTrace.callFrames.length)
+                break;
+
+            let boundaryCallFrame;
+            if (parentStackTrace.topCallFrameIsBoundary) {
+                boundaryCallFrame = parentStackTrace.callFrames[0];
+                console.assert(boundaryCallFrame.nativeCode && !boundaryCallFrame.sourceCodeLocation);
+            } else {
+                // Create a generic native CallFrame for the asynchronous boundary.
+                boundaryCallFrame = new WI.CallFrame(parentStackTrace.callFrames[0].target, {
+                    functionName: WI.UIString("(async)"),
+                    nativeCode: true,
+                });
+            }
+
+            parent.appendChild(new CallFrameUIClass(boundaryCallFrame, {showFunctionName: true, isAsyncBoundaryCallFrame: true}));
+
+            let startIndex = parentStackTrace.topCallFrameIsBoundary ? 1 : 0;
+            let parentCallFrames = startIndex ? parentStackTrace.callFrames.slice(startIndex) : parentStackTrace.callFrames;
+            WI.StackTraceTreeController._groupBlackboxedCallFrames(parent, parentCallFrames, {rememberBlackboxedCallFrameGroupToAutoExpand});
+
+            if (parentStackTrace.truncated) {
+                let truncatedCallFrame = new WI.CallFrame(parentStackTrace.callFrames[0].target, {
+                    functionName: WI.UIString("(call frames truncated)"),
+                    nativeCode: true,
+                });
+                parent.appendChild(new CallFrameUIClass(truncatedCallFrame, {showFunctionName: true, isTruncatedBoundaryCallFrame: true}));
+            }
+
+            parentStackTrace = parentStackTrace.parentStackTrace;
+        }
+
+        return activeCallFrameTreeElement;
+    }
+
+    static _groupBlackboxedCallFrames(parent, callFrames, {rememberBlackboxedCallFrameGroupToAutoExpand} = {})
+    {
+        let parentIsNode = parent instanceof Node;
+        console.assert(parentIsNode || parent instanceof WI.TreeOutline || parent instanceof WI.TreeElement, parent);
+        console.assert(Array.isArray(callFrames) && callFrames.length && callFrames.every((callFrame) => callFrame instanceof WI.CallFrame), callFrames);
+
+        let BlackboxedGroupUIClass = parentIsNode ? WI.BlackboxedGroupView : WI.BlackboxedGroupTreeElement;
+        let blackboxedGroupUIOptions = {rememberBlackboxedCallFrameGroupToAutoExpand};
+
+        let CallFrameUIClass = parentIsNode ? WI.CallFrameView : WI.CallFrameTreeElement;
+        let callFrameUIOptions = {showFunctionName: true, indicateIfBlackboxed: true};
+
+        let activeCallFrame = WI.debuggerManager.activeCallFrame;
+        let activeCallFrameTreeElement = null;
+
+        let blackboxedCallFrameGroupStartIndex = undefined;
+
+        function displayable(callFrame) {
+            if (parentIsNode) {
+                if (!callFrame.sourceCodeLocation && callFrame.functionName === null)
+                    return false;
+
+                if (callFrame.isConsoleEvaluation && !WI.settings.debugShowConsoleEvaluations.value)
+                    return false;
+            }
+
+            return true;
+        }
+
+        // Add one extra iteration to handle call stacks that start blackboxed.
+        for (let i = 0; i < callFrames.length + 1; ++i) {
+            let callFrame = callFrames[i];
+
+            if (callFrame) {
+                if (callFrames.length > 1 && !displayable(callFrame))
+                    continue;
+
+                if (callFrame.blackboxed) {
+                    blackboxedCallFrameGroupStartIndex ??= i;
+                    continue;
+                }
+            }
+
+            if (blackboxedCallFrameGroupStartIndex !== undefined) {
+                let blackboxedCallFrameGroup = callFrames.slice(blackboxedCallFrameGroupStartIndex, i).filter(displayable);
+                blackboxedCallFrameGroupStartIndex = undefined;
+
+                if (!rememberBlackboxedCallFrameGroupToAutoExpand || !WI.debuggerManager.shouldAutoExpandBlackboxedCallFrameGroup(blackboxedCallFrameGroup))
+                    parent.appendChild(new BlackboxedGroupUIClass(blackboxedCallFrameGroup, blackboxedGroupUIOptions));
+                else {
+                    for (let blackboxedCallFrame of blackboxedCallFrameGroup)
+                        parent.appendChild(new CallFrameUIClass(blackboxedCallFrame, callFrameUIOptions));
+                }
+            }
+
+            if (!callFrame)
+                continue;
+
+            let callFrameTreeElement = new CallFrameUIClass(callFrame, callFrameUIOptions);
+            if (callFrame === activeCallFrame && !parentIsNode)
+                activeCallFrameTreeElement = callFrameTreeElement;
+            parent.appendChild(callFrameTreeElement);
+        }
+
+        return activeCallFrameTreeElement;
+    }
+
+    // Public
+
+    get treeOutline() { return this._treeOutline; }
+
+    get stackTrace()
+    {
+        return this._stackTrace;
+    }
+
+    set stackTrace(stackTrace)
+    {
+        stackTrace = stackTrace || null;
+        if (this._stackTrace === stackTrace)
+            return;
+
+        this._stackTrace = stackTrace;
+
+        this._treeOutline.removeChildren();
+
+        if (this._stackTrace)
+            WI.StackTraceTreeController.groupBlackboxedStackTrace(this._treeOutline, this._stackTrace);
+    }
+
+    disconnect()
+    {
+        if (this._treeOutline.selectable)
+            this._treeOutline.removeEventListener(WI.TreeOutline.Event.SelectionDidChange, this._treeSelectionDidChange, this);
+        else
+            this._treeOutline.removeEventListener(WI.TreeOutline.Event.ElementClicked, this._treeElementClicked, this);
+    }
+
+    // Private
+
+    _treeElementClicked(event)
+    {
+        this._showSourceCodeLocation(event.data.treeElement);
+    }
+
+    _treeSelectionDidChange(event)
+    {
+        this._showSourceCodeLocation(this._treeOutline.selectedTreeElement);
+    }
+
+    _showSourceCodeLocation(treeElement)
+    {
+        let callFrame = treeElement.callFrame;
+        if (!callFrame.sourceCodeLocation)
+            return;
+
+        WI.showSourceCodeLocation(callFrame.sourceCodeLocation, {
+            ignoreNetworkTab: true,
+            ignoreSearchTab: true,
+            // Treat call frame clicks as link clicks since it jumps to a source location.
+            initiatorHint: WI.TabBrowser.TabNavigationInitiator.LinkClick,
+        });
+    }
+};

inspector/Controllers/TabActivityDiagnosticEventRecorder.js

@@ -0,0 +1,201 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.TabActivityDiagnosticEventRecorder = class TabActivityDiagnosticEventRecorder extends WI.DiagnosticEventRecorder
+{
+    constructor(controller)
+    {
+        super("TabActivity", controller);
+
+        this._inspectorHasFocus = true;
+        this._lastUserInteractionTimestamp = undefined;
+
+        this._eventSamplingTimerIdentifier = undefined;
+        this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+    }
+
+    // Static
+
+    // In milliseconds.
+    static get eventSamplingInterval() { return 60 * 1000; }
+    static get initialDelayBeforeSamplingInterval() { return 10 * 1000; }
+
+    // Protected
+
+    setup()
+    {
+        const options = {
+            capture: true,
+        };
+        window.addEventListener("focus", this, options);
+        window.addEventListener("blur", this, options);
+        window.addEventListener("keydown", this, options);
+        window.addEventListener("mousedown", this, options);
+
+        // If it's been less than 10 seconds since the frontend loaded, wait a bit.
+        if (performance.now() - WI.frontendCompletedLoadTimestamp < TabActivityDiagnosticEventRecorder.initialDelayBeforeSamplingInterval)
+            this._startInitialDelayBeforeSamplingTimer();
+        else
+            this._startEventSamplingTimer();
+
+    }
+
+    teardown()
+    {
+        const options = {
+            capture: true,
+        };
+        window.removeEventListener("focus", this, options);
+        window.removeEventListener("blur", this, options);
+        window.removeEventListener("keydown", this, options);
+        window.removeEventListener("mousedown", this, options);
+
+        this._stopInitialDelayBeforeSamplingTimer();
+        this._stopEventSamplingTimer();
+
+    }
+
+    // Public
+
+    handleEvent(event)
+    {
+        switch (event.type) {
+        case "focus":
+            this._handleWindowFocus(event);
+            break;
+        case "blur":
+            this._handleWindowBlur(event);
+            break;
+        case "keydown":
+            this._handleWindowKeyDown(event);
+            break;
+        case "mousedown":
+            this._handleWindowMouseDown(event);
+            break;
+        }
+    }
+
+    // Private
+
+    _startInitialDelayBeforeSamplingTimer()
+    {
+        if (this._initialDelayBeforeSamplingTimerIdentifier) {
+            clearTimeout(this._initialDelayBeforeSamplingTimerIdentifier);
+            this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+        }
+
+        // All intervals are in milliseconds.
+        let maximumInitialDelay = TabActivityDiagnosticEventRecorder.initialDelayBeforeSamplingInterval;
+        let elapsedTime = performance.now() - WI.frontendCompletedLoadTimestamp;
+        let remainingTime = maximumInitialDelay - elapsedTime;
+        let initialDelay = Number.constrain(remainingTime, 0, maximumInitialDelay);
+        this._initialDelayBeforeSamplingTimerIdentifier = setTimeout(this._sampleCurrentTabActivity.bind(this), initialDelay);
+    }
+
+    _stopInitialDelayBeforeSamplingTimer()
+    {
+        if (this._initialDelayBeforeSamplingTimerIdentifier) {
+            clearTimeout(this._initialDelayBeforeSamplingTimerIdentifier);
+            this._initialDelayBeforeSamplingTimerIdentifier = undefined;
+        }
+    }
+
+    _startEventSamplingTimer()
+    {
+        if (this._eventSamplingTimerIdentifier) {
+            clearTimeout(this._eventSamplingTimerIdentifier);
+            this._eventSamplingTimerIdentifier = undefined;
+        }
+
+        this._eventSamplingTimerIdentifier = setTimeout(this._sampleCurrentTabActivity.bind(this), TabActivityDiagnosticEventRecorder.eventSamplingInterval);
+    }
+
+    _stopEventSamplingTimer()
+    {
+        if (this._eventSamplingTimerIdentifier) {
+            clearTimeout(this._eventSamplingTimerIdentifier);
+            this._eventSamplingTimerIdentifier = undefined;
+        }
+    }
+
+    _sampleCurrentTabActivity()
+    {
+        // Set up the next timer first so later code can bail out if there's nothing to do.
+        this._stopEventSamplingTimer();
+        this._stopInitialDelayBeforeSamplingTimer();
+        this._startEventSamplingTimer();
+
+        let intervalSinceLastUserInteraction = performance.now() - this._lastUserInteractionTimestamp;
+        if (intervalSinceLastUserInteraction > TabActivityDiagnosticEventRecorder.eventSamplingInterval) {
+            if (WI.settings.debugAutoLogDiagnosticEvents.valueRespectingDebugUIAvailability)
+                console.log("TabActivity: sample not reported, last user interaction was %.1f seconds ago.".format(intervalSinceLastUserInteraction / 1000));
+            return;
+        }
+
+        let selectedTabContentView = WI.tabBrowser.selectedTabContentView;
+        console.assert(selectedTabContentView);
+        if (!selectedTabContentView)
+            return;
+
+        let tabType = selectedTabContentView.type;
+        let interval = TabActivityDiagnosticEventRecorder.eventSamplingInterval / 1000;
+        this.logDiagnosticEvent(this.name, {tabType, interval});
+    }
+
+    _didObserveUserInteraction()
+    {
+        if (!this._inspectorHasFocus)
+            return;
+
+        this._lastUserInteractionTimestamp = performance.now();
+    }
+
+    _handleWindowFocus(event)
+    {
+        if (event.target !== window)
+            return;
+
+        this._inspectorHasFocus = true;
+    }
+
+    _handleWindowBlur(event)
+    {
+        if (event.target !== window)
+            return;
+
+        this._inspectorHasFocus = false;
+    }
+
+    _handleWindowKeyDown(event)
+    {
+        this._didObserveUserInteraction();
+    }
+
+    _handleWindowMouseDown(event)
+    {
+        this._didObserveUserInteraction();
+    }
+};
+

inspector/Controllers/TabNavigationDiagnosticEventRecorder.js

@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2019 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.TabNavigationDiagnosticEventRecorder = class TabNavigationDiagnosticEventRecorder extends WI.DiagnosticEventRecorder
+{
+    constructor(controller)
+    {
+        super("TabNavigation", controller);
+    }
+
+    // Protected
+
+    setup()
+    {
+        WI.tabBrowser.addEventListener(WI.TabBrowser.Event.SelectedTabContentViewDidChange, this._selectedTabContentViewDidChange, this);
+    }
+
+    teardown()
+    {
+        WI.tabBrowser.removeEventListener(WI.TabBrowser.Event.SelectedTabContentViewDidChange, this._selectedTabContentViewDidChange, this);
+    }
+
+    // Private
+
+    _selectedTabContentViewDidChange(event)
+    {
+        let outgoingTabType = event.data.outgoingTab.identifier;
+        let incomingTabType = event.data.incomingTab.identifier;
+        let initiator = WI.TabNavigationDiagnosticEventRecorder.tabBrowserInitiatorToEventInitiator(event.data.initiator || WI.TabBrowser.TabNavigationInitiator.Unknown);
+        if (!initiator) {
+            // If initiator is null, then there is a missing value in the switch. This is a programming error.
+            WI.reportInternalError("Value of 'initiator' could not be parsed: " + event.data.initiator);
+            return;
+        }
+
+        this.logDiagnosticEvent(this.name, {outgoingTabType, incomingTabType, initiator});
+    }
+
+    static tabBrowserInitiatorToEventInitiator(tabBrowserInitiator)
+    {
+        switch (tabBrowserInitiator) {
+        case WI.TabBrowser.TabNavigationInitiator.TabClick:
+            return "tab-click";
+        case WI.TabBrowser.TabNavigationInitiator.LinkClick:
+            return "link-click";
+        case WI.TabBrowser.TabNavigationInitiator.ButtonClick:
+            return "button-click";
+        case WI.TabBrowser.TabNavigationInitiator.ContextMenu:
+            return "context-menu";
+        case WI.TabBrowser.TabNavigationInitiator.Dashboard:
+            return "dashboard";
+        case WI.TabBrowser.TabNavigationInitiator.Breakpoint:
+            return "breakpoint";
+        case WI.TabBrowser.TabNavigationInitiator.Inspect:
+            return "inspect";
+        case WI.TabBrowser.TabNavigationInitiator.KeyboardShortcut:
+            return "keyboard-shortcut";
+        case WI.TabBrowser.TabNavigationInitiator.FrontendAPI:
+            return "frontend-api";
+        case WI.TabBrowser.TabNavigationInitiator.Unknown:
+            return "unknown";
+        }
+
+        console.error("Unhandled initiator type: " + tabBrowserInitiator);
+        return null;
+    }
+};
+

inspector/Controllers/TargetManager.js

@@ -0,0 +1,312 @@
+/*
+ * Copyright (C) 2016-2018 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.TargetManager = class TargetManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._targets = new Map;
+        this._cachedTargetsList = null;
+        this._seenPageTarget = false;
+        this._transitionTimeoutIdentifier = undefined;
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        // COMPATIBILITY (iOS 13): Target.setPauseOnStart did not exist yet.
+        if (target.hasCommand("Target.setPauseOnStart"))
+            target.TargetAgent.setPauseOnStart(true);
+    }
+
+    // Public
+
+    get targets()
+    {
+        if (!this._cachedTargetsList)
+            this._cachedTargetsList = Array.from(this._targets.values()).filter((target) => !(target instanceof WI.MultiplexingBackendTarget));
+        return this._cachedTargetsList;
+    }
+
+    get workerTargets()
+    {
+        return this.targets.filter((target) => target.type === WI.TargetType.Worker);
+    }
+
+    get allTargets()
+    {
+        return Array.from(this._targets.values());
+    }
+
+    targetForIdentifier(targetId)
+    {
+        if (!targetId)
+            return null;
+
+        for (let target of this._targets.values()) {
+            if (target.identifier === targetId)
+                return target;
+        }
+
+        return null;
+    }
+
+    addTarget(target)
+    {
+        console.assert(target);
+        console.assert(!this._targets.has(target.identifier));
+
+        this._cachedTargetsList = null;
+        this._targets.set(target.identifier, target);
+
+        this.dispatchEventToListeners(WI.TargetManager.Event.TargetAdded, {target});
+    }
+
+    removeTarget(target)
+    {
+        console.assert(target);
+        console.assert(target !== WI.mainTarget);
+
+        this._cachedTargetsList = null;
+        this._targets.delete(target.identifier);
+        target.destroy();
+
+        this.dispatchEventToListeners(WI.TargetManager.Event.TargetRemoved, {target});
+    }
+
+    createMultiplexingBackendTarget()
+    {
+        console.assert(WI.sharedApp.debuggableType === WI.DebuggableType.WebPage);
+
+        let target = new WI.MultiplexingBackendTarget;
+        target.initialize();
+
+        this._initializeBackendTarget(target);
+
+        // Add the target without dispatching an event.
+        this._targets.set(target.identifier, target);
+    }
+
+    createDirectBackendTarget()
+    {
+        console.assert(WI.sharedApp.debuggableType !== WI.DebuggableType.WebPage);
+
+        let target = new WI.DirectBackendTarget;
+        target.initialize();
+
+        this._initializeBackendTarget(target);
+
+        if (WI.sharedApp.debuggableType === WI.DebuggableType.ITML || WI.sharedApp.debuggableType === WI.DebuggableType.Page)
+            this._initializePageTarget(target);
+
+        this.addTarget(target);
+    }
+
+    // TargetObserver
+
+    targetCreated(parentTarget, targetInfo)
+    {
+        let connection = new InspectorBackend.TargetConnection(parentTarget, targetInfo.targetId);
+        let subTarget = this._createTarget(parentTarget, targetInfo, connection);
+        this._checkAndHandlePageTargetTransition(subTarget);
+        subTarget.initialize();
+        this.addTarget(subTarget);
+    }
+
+    didCommitProvisionalTarget(parentTarget, previousTargetId, newTargetId)
+    {
+        this.targetDestroyed(previousTargetId);
+        let target = this._targets.get(newTargetId);
+        console.assert(target);
+        if (!target)
+            return;
+
+        target.didCommitProvisionalTarget();
+        this._checkAndHandlePageTargetTransition(target);
+        target.connection.dispatchProvisionalMessages();
+
+        this.dispatchEventToListeners(WI.TargetManager.Event.DidCommitProvisionalTarget, {previousTargetId, target});
+    }
+
+    targetDestroyed(targetId)
+    {
+        let target = this._targets.get(targetId);
+        if (!target)
+            return;
+
+        this._checkAndHandlePageTargetTermination(target);
+        this.removeTarget(target);
+    }
+
+    dispatchMessageFromTarget(targetId, message)
+    {
+        let target = this._targets.get(targetId);
+        console.assert(target);
+        if (!target)
+            return;
+
+        if (target.isProvisional)
+            target.connection.addProvisionalMessage(message);
+        else
+            target.connection.dispatch(message);
+    }
+
+    // Private
+
+    _createTarget(parentTarget, targetInfo, connection)
+    {
+        // COMPATIBILITY (iOS 13.0): `Target.TargetInfo.isProvisional` and `Target.TargetInfo.isPaused` did not exist yet.
+        let {targetId, type, isProvisional, isPaused} = targetInfo;
+
+        switch (type) {
+        case InspectorBackend.Enum.Target.TargetInfoType.Page:
+            return new WI.PageTarget(parentTarget, targetId, WI.UIString("Page"), connection, {isProvisional, isPaused});
+        case InspectorBackend.Enum.Target.TargetInfoType.Worker:
+            return new WI.WorkerTarget(parentTarget, targetId, WI.UIString("Worker"), connection, {isPaused});
+        case "serviceworker": // COMPATIBILITY (iOS 13): "serviceworker" was renamed to "service-worker".
+        case InspectorBackend.Enum.Target.TargetInfoType.ServiceWorker:
+            return new WI.WorkerTarget(parentTarget, targetId, WI.UIString("ServiceWorker"), connection, {isPaused});
+        }
+
+        throw "Unknown Target type: " + type;
+    }
+
+    _checkAndHandlePageTargetTransition(target)
+    {
+        if (target.type !== WI.TargetType.Page)
+            return;
+
+        if (target.isProvisional)
+            return;
+
+        // First page target.
+        if (!WI.pageTarget && !this._seenPageTarget) {
+            this._seenPageTarget = true;
+            this._initializePageTarget(target);
+            return;
+        }
+
+        // Transitioning page target.
+        this._transitionPageTarget(target);
+    }
+
+    _checkAndHandlePageTargetTermination(target)
+    {
+        if (target.type !== WI.TargetType.Page)
+            return;
+
+        if (target.isProvisional)
+            return;
+
+        console.assert(target === WI.pageTarget);
+        console.assert(this._seenPageTarget);
+
+        // Terminating the page target.
+        this._terminatePageTarget(target);
+
+        // Ensure we transition in a reasonable amount of time, otherwise close.
+        const timeToTransition = 2000;
+        clearTimeout(this._transitionTimeoutIdentifier);
+        this._transitionTimeoutIdentifier = setTimeout(() => {
+            this._transitionTimeoutIdentifier = undefined;
+            if (WI.pageTarget)
+                return;
+            if (WI.isEngineeringBuild)
+                throw new Error("Error: No new pageTarget some time after last page target was terminated. Failed transition?");
+            WI.close();
+        }, timeToTransition);
+    }
+
+    _initializeBackendTarget(target)
+    {
+        console.assert(!WI.mainTarget);
+
+        WI.backendTarget = target;
+
+        this._resetMainExecutionContext();
+
+        WI._backendTargetAvailablePromise.resolve();
+    }
+
+    _initializePageTarget(target)
+    {
+        console.assert(WI.sharedApp.isWebDebuggable() || WI.sharedApp.debuggableType === WI.DebuggableType.ITML);
+        console.assert(target.type === WI.TargetType.Page || target instanceof WI.DirectBackendTarget);
+
+        WI.pageTarget = target;
+
+        this._resetMainExecutionContext();
+
+        WI._pageTargetAvailablePromise.resolve();
+    }
+
+    _transitionPageTarget(target)
+    {
+        console.assert(!WI.pageTarget);
+        console.assert(WI.sharedApp.debuggableType === WI.DebuggableType.WebPage);
+        console.assert(target.type === WI.TargetType.Page);
+
+        WI.pageTarget = target;
+
+        this._resetMainExecutionContext();
+
+        // Actions to transition the page target.
+        WI.notifications.dispatchEventToListeners(WI.Notification.TransitionPageTarget);
+        WI.domManager.transitionPageTarget();
+        WI.networkManager.transitionPageTarget();
+        WI.timelineManager.transitionPageTarget();
+    }
+
+    _terminatePageTarget(target)
+    {
+        console.assert(WI.pageTarget);
+        console.assert(WI.pageTarget === target);
+        console.assert(WI.sharedApp.debuggableType === WI.DebuggableType.WebPage);
+
+        // Remove any Worker targets associated with this page.
+        for (let workerTarget of this.workerTargets)
+            WI.workerManager.workerTerminated(workerTarget.identifier);
+
+        WI.pageTarget = null;
+    }
+
+    _resetMainExecutionContext()
+    {
+        if (WI.mainTarget instanceof WI.MultiplexingBackendTarget)
+            return;
+
+        if (WI.mainTarget.executionContext)
+            WI.runtimeManager.activeExecutionContext = WI.mainTarget.executionContext;
+    }
+};
+
+WI.TargetManager.Event = {
+    TargetAdded: "target-manager-target-added",
+    TargetRemoved: "target-manager-target-removed",
+    DidCommitProvisionalTarget: "target-manager-provisional-target-committed",
+};

inspector/Controllers/TypeTokenAnnotator.js

@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2014, 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.TypeTokenAnnotator = class TypeTokenAnnotator extends WI.Annotator
+{
+    constructor(sourceCodeTextEditor, script)
+    {
+        super(sourceCodeTextEditor);
+
+        this._script = script;
+        this._typeTokenNodes = [];
+        this._typeTokenBookmarks = [];
+    }
+
+    // Protected
+
+    insertAnnotations()
+    {
+        if (!this.isActive())
+            return;
+
+        var scriptSyntaxTree = this._script.scriptSyntaxTree;
+
+        if (!scriptSyntaxTree) {
+            this._script.requestScriptSyntaxTree((syntaxTree) => {
+                // After requesting the tree, we still might get a null tree from a parse error.
+                if (syntaxTree)
+                    this.insertAnnotations();
+            });
+            return;
+        }
+
+        if (!scriptSyntaxTree.parsedSuccessfully)
+            return;
+
+        let {startPosition, endPosition} = this.sourceCodeTextEditor.visibleRangePositions();
+
+        let startTime = Date.now();
+        let allNodesInRange = scriptSyntaxTree.filterByRange(startPosition, endPosition);
+        scriptSyntaxTree.updateTypes(allNodesInRange, (nodesWithUpdatedTypes) => {
+            // Because this is an asynchronous call, we could have been deactivated before the callback function is called.
+            if (!this.isActive())
+                return;
+
+            nodesWithUpdatedTypes.forEach(this._insertTypeToken, this);
+
+            let totalTime = Date.now() - startTime;
+            let timeoutTime = Number.constrain(8 * totalTime, 500, 2000);
+            this._timeoutIdentifier = setTimeout(() => {
+                this._timeoutIdentifier = null;
+                this.insertAnnotations();
+            }, timeoutTime);
+        });
+    }
+
+    clearAnnotations()
+    {
+        this._clearTypeTokens();
+    }
+
+    // Private
+
+    _insertTypeToken(node)
+    {
+        if (node.type === WI.ScriptSyntaxTree.NodeType.Identifier) {
+            if (!node.attachments.__typeToken && node.attachments.types && node.attachments.types.valid)
+                this._insertToken(node, false, WI.TypeTokenView.TitleType.Variable, node.name);
+
+            if (node.attachments.__typeToken)
+                node.attachments.__typeToken.update(node.attachments.types);
+
+            return;
+        }
+
+        console.assert(node.type === WI.ScriptSyntaxTree.NodeType.FunctionDeclaration || node.type === WI.ScriptSyntaxTree.NodeType.FunctionExpression || node.type === WI.ScriptSyntaxTree.NodeType.ArrowFunctionExpression);
+
+        var functionReturnType = node.attachments.returnTypes;
+        if (!functionReturnType || !functionReturnType.valid)
+            return;
+
+        // If a function does not have an explicit return statement with an argument (i.e, "return x;" instead of "return;")
+        // then don't show a return type unless we think it's a constructor.
+        var scriptSyntaxTree = this._script._scriptSyntaxTree;
+        if (!node.attachments.__typeToken && (scriptSyntaxTree.containsNonEmptyReturnStatement(node.body) || !functionReturnType.typeSet.isContainedIn(WI.TypeSet.TypeBit.Undefined))) {
+            var functionName = node.id ? node.id.name : null;
+            this._insertToken(node, true, WI.TypeTokenView.TitleType.ReturnStatement, functionName);
+        }
+
+        if (node.attachments.__typeToken)
+            node.attachments.__typeToken.update(node.attachments.returnTypes);
+    }
+
+    _insertToken(node, shouldTranslateOffsetToAfterParameterList, typeTokenTitleType, functionOrVariableName)
+    {
+        let tokenPosition = this.sourceCodeTextEditor.originalPositionToCurrentPosition(node.startPosition);
+        let currentOffset = this.sourceCodeTextEditor.currentPositionToCurrentOffset(tokenPosition);
+        let sourceString = this.sourceCodeTextEditor.string;
+
+        if (shouldTranslateOffsetToAfterParameterList) {
+            // Translate the position to the closing parenthesis of the function arguments:
+            // translate from: [type-token] function foo() {} => to: function foo() [type-token] {}
+            currentOffset = this._translateToOffsetAfterFunctionParameterList(node, currentOffset, sourceString);
+            tokenPosition = this.sourceCodeTextEditor.currentOffsetToCurrentPosition(currentOffset);
+        }
+
+        // Note: bookmarks render to the left of the character they're being displayed next to.
+        // This is why right margin checks the current offset. And this is okay to do because JavaScript can't be written right-to-left.
+        var isSpaceRegexp = /\s/;
+        var shouldHaveLeftMargin = currentOffset !== 0 && !isSpaceRegexp.test(sourceString[currentOffset - 1]);
+        var shouldHaveRightMargin = !isSpaceRegexp.test(sourceString[currentOffset]);
+        var typeToken = new WI.TypeTokenView(this, shouldHaveRightMargin, shouldHaveLeftMargin, typeTokenTitleType, functionOrVariableName);
+        var bookmark = this.sourceCodeTextEditor.setInlineWidget(tokenPosition, typeToken.element);
+        node.attachments.__typeToken = typeToken;
+        this._typeTokenNodes.push(node);
+        this._typeTokenBookmarks.push(bookmark);
+    }
+
+    _translateToOffsetAfterFunctionParameterList(node, offset, sourceString)
+    {
+        // The assumption here is that we get the offset starting at the function keyword (or after the get/set keywords).
+        // We will return the offset for the closing parenthesis in the function declaration.
+        // All this code is just a way to find this parenthesis while ignoring comments.
+
+        var isMultiLineComment = false;
+        var isSingleLineComment = false;
+        var shouldIgnore = false;
+        const isArrowFunction = node.type === WI.ScriptSyntaxTree.NodeType.ArrowFunctionExpression;
+
+        function isLineTerminator(char)
+        {
+            // Reference EcmaScript 5 grammar for single line comments and line terminators:
+            // http://www.ecma-international.org/ecma-262/5.1/#sec-7.3
+            // http://www.ecma-international.org/ecma-262/5.1/#sec-7.4
+            return char === "\n" || char === "\r" || char === "\u2028" || char === "\u2029";
+        }
+
+        while (((!isArrowFunction && sourceString[offset] !== ")")
+                || (isArrowFunction && sourceString[offset] !== ">")
+                || shouldIgnore)
+               && offset < sourceString.length) {
+            if (isSingleLineComment && isLineTerminator(sourceString[offset])) {
+                isSingleLineComment = false;
+                shouldIgnore = false;
+            } else if (isMultiLineComment && sourceString[offset] === "*" && sourceString[offset + 1] === "/") {
+                isMultiLineComment = false;
+                shouldIgnore = false;
+                offset++;
+            } else if (!shouldIgnore && sourceString[offset] === "/") {
+                offset++;
+                if (sourceString[offset] === "*")
+                    isMultiLineComment = true;
+                else if (sourceString[offset] === "/")
+                    isSingleLineComment = true;
+                else
+                    throw new Error("Bad parsing. Couldn't parse comment preamble.");
+                shouldIgnore = true;
+            }
+
+            offset++;
+        }
+
+        return offset + 1;
+    }
+
+    _clearTypeTokens()
+    {
+        this._typeTokenNodes.forEach(function(node) {
+            node.attachments.__typeToken = null;
+        });
+        this._typeTokenBookmarks.forEach(function(bookmark) {
+            bookmark.clear();
+        });
+
+        this._typeTokenNodes = [];
+        this._typeTokenBookmarks = [];
+    }
+};

inspector/Controllers/WebInspectorExtensionController.js

@@ -0,0 +1,464 @@
+/*
+ * Copyright (C) 2020-2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.WebInspectorExtensionController = class WebInspectorExtensionController extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._extensionForExtensionIDMap = new Map;
+        this._extensionTabContentViewForExtensionTabIDMap = new Map;
+        this._tabIDsForExtensionIDMap = new Multimap;
+        this._nextExtensionTabID = 1;
+
+        this._extensionTabPositions = null;
+        this._saveTabPositionsDebouncer = null;
+
+        WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._handleMainResourceDidChange, this);
+    }
+
+    // Static
+
+    static get extensionTabPositionsObjectStoreKey()
+    {
+        return "extension-tab-positions";
+    }
+
+    // Public
+
+    get registeredExtensionIDs()
+    {
+        return new Set(this._extensionForExtensionIDMap.keys());
+    }
+
+    registerExtension(extensionID, extensionBundleIdentifier, displayName)
+    {
+        if (this._extensionForExtensionIDMap.has(extensionID)) {
+            WI.reportInternalError("Unable to register extension, it's already registered: " + extensionID);
+            return WI.WebInspectorExtension.ErrorCode.RegistrationFailed;
+        }
+
+        if (!this._extensionForExtensionIDMap.size) {
+            WI.tabBrowser.tabBar.addEventListener(WI.TabBar.Event.TabBarItemAdded, this._saveExtensionTabPositions, this);
+            WI.tabBrowser.tabBar.addEventListener(WI.TabBar.Event.TabBarItemRemoved, this._saveExtensionTabPositions, this);
+            WI.tabBrowser.tabBar.addEventListener(WI.TabBar.Event.TabBarItemsReordered, this._saveExtensionTabPositions, this);
+        }
+
+        let extension = new WI.WebInspectorExtension(extensionID, extensionBundleIdentifier, displayName);
+        this._extensionForExtensionIDMap.set(extensionID, extension);
+
+        this.dispatchEventToListeners(WI.WebInspectorExtensionController.Event.ExtensionAdded, {extension});
+    }
+
+    unregisterExtension(extensionID)
+    {
+        let extension = this._extensionForExtensionIDMap.take(extensionID);
+        if (!extension) {
+            WI.reportInternalError("Unable to unregister extension with unknown ID: " + extensionID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        if (!this._extensionForExtensionIDMap.size) {
+            WI.tabBrowser.tabBar.removeEventListener(WI.TabBar.Event.TabBarItemAdded, this._saveExtensionTabPositions, this);
+            WI.tabBrowser.tabBar.removeEventListener(WI.TabBar.Event.TabBarItemRemoved, this._saveExtensionTabPositions, this);
+            WI.tabBrowser.tabBar.removeEventListener(WI.TabBar.Event.TabBarItemsReordered, this._saveExtensionTabPositions, this);
+        }
+
+        let extensionTabIDsToRemove = this._tabIDsForExtensionIDMap.take(extensionID) || [];
+        for (let extensionTabID of extensionTabIDsToRemove) {
+            let tabContentView = this._extensionTabContentViewForExtensionTabIDMap.take(extensionTabID);
+
+            // Ensure that the iframe is actually detached and does not leak.
+            WI.tabBrowser.closeTabForContentView(tabContentView, {suppressAnimations: true});
+            tabContentView.dispose();
+        }
+
+        this.dispatchEventToListeners(WI.WebInspectorExtensionController.Event.ExtensionRemoved, {extension});
+    }
+
+    async createTabForExtension(extensionID, tabName, tabIconURL, sourceURL)
+    {
+        let extension = this._extensionForExtensionIDMap.get(extensionID);
+        if (!extension) {
+            WI.reportInternalError("Unable to create tab for extension with unknown ID: " + extensionID + " sourceURL: " + sourceURL);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        let extensionTabID = `WebExtensionTab-${extensionID}-${this._nextExtensionTabID++}`;
+        let tabContentView = new WI.WebInspectorExtensionTabContentView(extension, extensionTabID, tabName, tabIconURL, sourceURL);
+
+        this._tabIDsForExtensionIDMap.add(extensionID, extensionTabID);
+        this._extensionTabContentViewForExtensionTabIDMap.set(extensionTabID, tabContentView);
+
+        if (!this._extensionTabPositions)
+            await this._loadExtensionTabPositions();
+
+        WI.tabBrowser.addTabForContentView(tabContentView, {
+            suppressAnimations: true,
+            insertionIndex: this._insertionIndexForExtensionTab(tabContentView),
+        });
+
+        // The calling convention is to return an error string or a result object.
+        return {"result": extensionTabID};
+    }
+
+    evaluateScriptForExtension(extensionID, scriptSource, {frameURL, contextSecurityOrigin, useContentScriptContext} = {})
+    {
+        let extension = this._extensionForExtensionIDMap.get(extensionID);
+        if (!extension) {
+            WI.reportInternalError("Unable to evaluate script for extension with unknown ID: " + extensionID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        let frame = this._frameForFrameURL(frameURL);
+        if (!frame) {
+            WI.reportInternalError("evaluateScriptForExtension: No frame matched provided frameURL: " + frameURL);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        if (contextSecurityOrigin) {
+            WI.reportInternalError("evaluateScriptForExtension: the 'contextSecurityOrigin' option is not yet implemented.");
+            return WI.WebInspectorExtension.ErrorCode.NotImplemented;
+        }
+
+        if (useContentScriptContext) {
+            WI.reportInternalError("evaluateScriptForExtension: the 'useContentScriptContext' option is not yet implemented.");
+            return WI.WebInspectorExtension.ErrorCode.NotImplemented;
+        }
+
+        let evaluationContext = frame.pageExecutionContext;
+        if (!evaluationContext) {
+            WI.reportInternalError("evaluateScriptForExtension: No 'pageExecutionContext' was present for frame with URL: " + frame.url);
+            return WI.WebInspectorExtension.ErrorCode.ContextDestroyed;
+        }
+
+        return evaluationContext.target.RuntimeAgent.evaluate.invoke({
+            expression: scriptSource,
+            objectGroup: "extension-evaluation",
+            includeCommandLineAPI: true,
+            returnByValue: true,
+            generatePreview: false,
+            saveResult: false,
+            contextId: evaluationContext.id,
+        }).then((payload) => {
+            let resultOrError = payload.result;
+            let wasThrown = payload.wasThrown;
+            let {type, value} = resultOrError;
+            return wasThrown ? {"error": resultOrError.description} : {"result": value};
+        }).catch((error) => error.description);
+    }
+
+    reloadForExtension(extensionID, {ignoreCache, userAgent, injectedScript} = {})
+    {
+        let extension = this._extensionForExtensionIDMap.get(extensionID);
+        if (!extension) {
+            WI.reportInternalError("Unable to evaluate script for extension with unknown ID: " + extensionID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        // FIXME: <webkit.org/b/222328> Implement `userAgent` and `injectedScript` options for `devtools.inspectedWindow.reload` command
+        if (userAgent) {
+            WI.reportInternalError("reloadForExtension: the 'userAgent' option is not yet implemented.");
+            return WI.WebInspectorExtension.ErrorCode.NotImplemented;
+        }
+
+        if (injectedScript) {
+            WI.reportInternalError("reloadForExtension: the 'injectedScript' option is not yet implemented.");
+            return WI.WebInspectorExtension.ErrorCode.NotImplemented;
+        }
+
+        let target = WI.assumingMainTarget();
+        if (!target.hasCommand("Page.reload"))
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+
+        return target.PageAgent.reload.invoke({ignoreCache});
+    }
+
+    navigateTabForExtension(extensionTabID, sourceURL)
+    {
+        let tabContentView = this._extensionTabContentViewForExtensionTabIDMap.get(extensionTabID);
+        if (!tabContentView) {
+            WI.reportInternalError("Unable to navigate extension tab with unknown extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        tabContentView.iframeURL = sourceURL;
+    }
+
+    showExtensionTab(extensionTabID, options = {})
+    {
+        let tabContentView = this._extensionTabContentViewForExtensionTabIDMap.get(extensionTabID);
+        if (!tabContentView) {
+            WI.reportInternalError("Unable to show extension tab with unknown extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        tabContentView.visible = true;
+        let success = WI.tabBrowser.showTabForContentView(tabContentView, {
+            ...options,
+            insertionIndex: this._insertionIndexForExtensionTab(tabContentView),
+            initiatorHint: WI.TabBrowser.TabNavigationInitiator.FrontendAPI,
+        });
+
+        if (!success) {
+            WI.reportInternalError("Unable to show extension tab with extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InternalError;
+        }
+
+        tabContentView.visible = true;
+
+        // Clients expect to be able to use evaluateScriptInExtensionTab() when this method
+        // returns, so wait for the extension tab to finish its loading sequence. Wrap the result.
+        return tabContentView.whenPageAvailable().then((sourceURL) => { return {"result": sourceURL}; });
+    }
+
+    hideExtensionTab(extensionTabID, options = {})
+    {
+        let tabContentView = this._extensionTabContentViewForExtensionTabIDMap.get(extensionTabID);
+        if (!tabContentView) {
+            WI.reportInternalError("Unable to show extension tab with unknown extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        tabContentView.visible = false;
+        WI.tabBrowser.closeTabForContentView(tabContentView, options);
+
+        console.assert(!tabContentView.visible);
+        console.assert(!tabContentView.isClosed);
+    }
+
+    addContextMenuItemsForClosedExtensionTabs(contextMenu)
+    {
+        contextMenu.appendSeparator();
+
+        for (let tabContentView of this._extensionTabContentViewForExtensionTabIDMap.values()) {
+            // If the extension tab has been unchecked in the TabBar context menu, then the tabBarItem
+            // for the extension tab will not be connected to a parent TabBar.
+            let shouldIncludeTab = !tabContentView.visible || !tabContentView.tabBarItem.parentTabBar;
+            if (!shouldIncludeTab)
+                continue;
+
+            contextMenu.appendItem(tabContentView.tabInfo().displayName, () => {
+                this.showExtensionTab(tabContentView.extensionTabID);
+            });
+        }
+    }
+
+    addContextMenuItemsForAllExtensionTabs(contextMenu)
+    {
+        contextMenu.appendSeparator();
+
+        for (let tabContentView of this._extensionTabContentViewForExtensionTabIDMap.values()) {
+            let checked = tabContentView.visible || !!tabContentView.tabBarItem.parentTabBar;
+            contextMenu.appendCheckboxItem(tabContentView.tabInfo().displayName, () => {
+                if (!checked)
+                    this.showExtensionTab(tabContentView.extensionTabID);
+                else
+                    this.hideExtensionTab(tabContentView.extensionTabID);
+            }, checked);
+        }
+    }
+
+    activeExtensionTabContentViews()
+    {
+        return Array.from(this._extensionTabContentViewForExtensionTabIDMap.values()).filter((tab) => tab.visible || tab.tabBarItem.parentTabBar);
+    }
+
+    evaluateScriptInExtensionTab(extensionTabID, scriptSource)
+    {
+        let tabContentView = this._extensionTabContentViewForExtensionTabIDMap.get(extensionTabID);
+        if (!tabContentView) {
+            WI.reportInternalError("Unable to evaluate with unknown extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        let iframe = tabContentView.iframeElement;
+        if (!(iframe instanceof HTMLIFrameElement)) {
+            WI.reportInternalError("Unable to evaluate without an <iframe> for extensionTabID: " + extensionTabID);
+            return WI.WebInspectorExtension.ErrorCode.InvalidRequest;
+        }
+
+        return new Promise((resolve, reject) => {
+            try {
+                // If `result` is a promise, then it came from a different frame and `instanceof Promise` won't work.
+                let result = InspectorFrontendHost.evaluateScriptInExtensionTab(iframe, scriptSource);
+                if (result?.then) {
+                    result.then((resolvedValue) => resolve({result: resolvedValue}), (errorValue) => reject({error: errorValue}));
+                    return;
+                }
+
+                resolve({result});
+            } catch (error) {
+                // Include more context in the stringification of the error.
+                const stackIndent = "  ";
+                let stackLines = (error.stack?.split("\n") || []).map((line) => `${stackIndent}${line}`);
+                let formattedMessage = [
+                    `Caught Exception: ${error.name}`,
+                    `at ${error.sourceURL || "(unknown)"}:${error.line || 0}:${error.column || 0}:`,
+                    error.message,
+                    "",
+                    "Backtrace:",
+                    ...stackLines,
+                ].join("\n");
+                reject({error: formattedMessage});
+            }
+        });
+    }
+
+    // Private
+
+    async _loadExtensionTabPositions()
+    {
+        let savedTabPositions = await WI.objectStores.general.get(WebInspectorExtensionController.extensionTabPositionsObjectStoreKey);
+        this._extensionTabPositions = savedTabPositions || {};
+    }
+
+    _saveExtensionTabPositions()
+    {
+        if (!this._extensionTabPositions)
+            return;
+
+        this._saveTabPositionsDebouncer ||= new Debouncer(() => {
+            for (let tabBarItem of WI.tabBrowser.tabBar.visibleTabBarItemsFromLeftToRight) {
+                if (!(tabBarItem.representedObject instanceof WI.WebInspectorExtensionTabContentView))
+                    continue;
+
+                let {anchorTabType, anchorTabIndex, distanceFromAnchorTab} = this._computeIndicesForExtensionTab(tabBarItem.representedObject, {recomputePositions: true});
+                this._extensionTabPositions[tabBarItem.representedObject.savedTabPositionKey] = {anchorTabType, distanceFromAnchorTab};
+            }
+
+            WI.objectStores.general.put(this._extensionTabPositions, WebInspectorExtensionController.extensionTabPositionsObjectStoreKey);
+        });
+        this._saveTabPositionsDebouncer.delayForTime(5000);
+    }
+
+    _insertionIndexForExtensionTab(tabContentView, options = {})
+    {
+        let {anchorTabType, anchorTabIndex, distanceFromAnchorTab} = this._computeIndicesForExtensionTab(tabContentView, options);
+        return anchorTabIndex + distanceFromAnchorTab + 1;
+    }
+
+    _computeIndicesForExtensionTab(tabContentView, {recomputePositions} = {})
+    {
+        // Note: pinned tabs always appear on the trailing edge, so we can ignore them
+        // for the purposes of computing an `insertionIndex`` for `tabContentView`.
+        let anchorTabIndex = 0;
+        let savedPositions = this._extensionTabPositions[tabContentView.savedTabPositionKey] || {};
+        let anchorTabType = (recomputePositions && savedPositions.anchorTabType) || null;
+        let distanceFromAnchorTab = (recomputePositions && savedPositions.distanceFromAnchorTab) || 0;
+
+        let visibleTabBarItems = WI.tabBrowser.tabBar.visibleTabBarItemsFromLeftToRight;
+        for (let i = 0; i < visibleTabBarItems.length; ++i) {
+            let visibleTab = visibleTabBarItems[i].representedObject;
+            if (!visibleTab)
+                continue;
+
+            if (visibleTab === tabContentView)
+                break;
+
+            if (visibleTab instanceof WI.WebInspectorExtensionTabContentView)
+                continue;
+
+            if (recomputePositions) {
+                anchorTabType = visibleTab.type || null;
+                continue;
+            }
+
+            if (visibleTab.type !== anchorTabType)
+                continue;
+
+            anchorTabIndex = i;
+            break;
+        }
+
+        // Find the count of extension tabs after the anchor tab to compute the real distanceFromAnchorTab.
+        // Adding `distanceFromAnchorTab` to `anchorTabIndex` should not insert the tab after a different anchor tab.
+        for (let i = 1; i < visibleTabBarItems.length - anchorTabIndex; ++i) {
+            if (visibleTabBarItems[anchorTabIndex + i].representedObject?.constructor?.shouldSaveTab?.()) {
+                distanceFromAnchorTab = Number.constrain(distanceFromAnchorTab, 0, Math.max(0, i - 1));
+                return {anchorTabType, anchorTabIndex, distanceFromAnchorTab};
+            }
+        }
+
+        // If the anchor tab is now hidden upon restoring, place the extension at the end.
+        // This could happen if a smaller set of tabs are enabled for the inspection target.
+        anchorTabIndex = visibleTabBarItems.length - 1;
+        return {anchorTabType, anchorTabIndex, distanceFromAnchorTab};
+    }
+
+    _frameForFrameURL(frameURL)
+    {
+        if (!frameURL)
+            return WI.networkManager.mainFrame;
+
+        function findFrame(frameURL, adjustKnownFrameURL) {
+            return WI.networkManager.frames.find((knownFrame) => {
+                let knownFrameURL = new URL(knownFrame.url);
+                adjustKnownFrameURL?.(knownFrameURL);
+                return knownFrameURL.toString() === frameURL;
+            });
+        }
+
+        let frame = findFrame(frameURL);
+        if (frame)
+            return frame;
+
+        let frameURLParts = new URL(frameURL);
+        if (frameURLParts.hash.length)
+            return null;
+
+        frame = findFrame(frameURL, (knownFrameURL) => {
+            knownFrameURL.hash = "";
+        });
+        if (frame)
+            return frame;
+
+        if (frameURLParts.search.length)
+            return null;
+
+        return findFrame(frameURL, (knownFrameURL) => {
+            knownFrameURL.hash = "";
+            knownFrameURL.search = "";
+        });
+    }
+
+    _handleMainResourceDidChange(event)
+    {
+        if (!event.target.isMainFrame())
+            return;
+
+        // Don't fire the event unless one or more extensions are registered.
+        if (!this._extensionForExtensionIDMap.size)
+            return;
+
+        InspectorFrontendHost.inspectedPageDidNavigate(WI.networkManager.mainFrame.url);
+    }
+};
+
+WI.WebInspectorExtensionController.Event = {
+    ExtensionAdded: "extension-added",
+    ExtensionRemoved: "extension-removed",
+};

inspector/Controllers/WorkerManager.js

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.WorkerManager = class WorkerManager extends WI.Object
+{
+    constructor()
+    {
+        super();
+
+        this._connections = new Map;
+    }
+
+    // Target
+
+    initializeTarget(target)
+    {
+        if (target.hasDomain("Worker"))
+            target.WorkerAgent.enable();
+    }
+
+    // WorkerObserver
+
+    workerCreated(target, workerId, url, name)
+    {
+        console.assert(target.hasCommand("Worker.sendMessageToWorker"));
+        let connection = new InspectorBackend.WorkerConnection;
+        let workerTarget = new WI.WorkerTarget(target, workerId, url, name, connection);
+        workerTarget.initialize();
+
+        WI.targetManager.addTarget(workerTarget);
+
+        this._connections.set(workerId, connection);
+
+        // Unpause the worker now that we have sent all initialization messages.
+        // Ignore errors if a worker went away quickly.
+        target.WorkerAgent.initialized(workerId).catch(function(){});
+    }
+
+    workerTerminated(workerId)
+    {
+        let connection = this._connections.take(workerId);
+
+        WI.targetManager.removeTarget(connection.target);
+    }
+
+    dispatchMessageFromWorker(workerId, message)
+    {
+        let connection = this._connections.get(workerId);
+
+        console.assert(connection);
+        if (!connection)
+            return;
+
+        connection.dispatch(message);
+    }
+};

inspector/Debug/Bootstrap.css

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2020 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+body.focus-debug [tabindex="0"] {
+    outline: 1px solid hsla(300, 100%, 50%, 0.4) !important;
+    outline-offset: -2px !important;
+}
+
+body.focus-debug *:focus {
+    outline: 2px solid hsl(300, 100%, 50%) !important;
+    outline-offset: -1px !important;
+}
+
+.tab-bar > .navigation-bar .inspect-inspector {
+    width: 1em !important;
+}
+
+/* These rules are adapted from TabBar.css and are expected to match. */
+body.window-inactive .tab-bar > .navigation-bar .item.button.text-only {
+    color: hsla(0, 0%, var(--foreground-lightness), 0.4);
+}
+.tab-bar > .navigation-bar .item.button.text-only {
+    color: hsla(0, 0%, var(--foreground-lightness), 0.6);
+}
+
+.tab-bar > .navigation-bar .item.button.text-only:not(.selected):hover {
+    color: hsla(0, 0%, var(--foreground-lightness), 0.7);
+}
+
+.tab-bar > .navigation-bar .item.button.text-only:not(.disabled).selected {
+    color: hsla(0, 0%, var(--foreground-lightness), 0.8);
+}
+
+body.window-inactive .tab-bar > .navigation-bar .item.button.text-only:not(.disabled).selected > {
+    color: hsla(0, 0%, var(--foreground-lightness), 0.5);
+}

inspector/Debug/Bootstrap.js

@@ -0,0 +1,181 @@
+/*
+ * Copyright (C) 2015 University of Washington.
+ * Copyright (C) 2021 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.isEngineeringBuild = true;
+
+// Disable Pause in Internal Scripts if Show Internal Scripts is dibbled.
+WI.settings.engineeringShowInternalScripts.addEventListener(WI.Setting.Event.Changed, function(event) {
+    if (!WI.settings.engineeringShowInternalScripts.value)
+        WI.settings.engineeringPauseForInternalScripts.value = false;
+}, WI.settings.engineeringPauseForInternalScripts);
+
+// Enable Show Internal Scripts if Pause in Internal Scripts is enabled.
+WI.settings.engineeringPauseForInternalScripts.addEventListener(WI.Setting.Event.Changed, function(event) {
+    if (WI.settings.engineeringPauseForInternalScripts.value)
+        WI.settings.engineeringShowInternalScripts.value = true;
+}, WI.settings.engineeringShowInternalScripts);
+
+WI.showDebugUISetting = new WI.Setting("show-debug-ui", false);
+
+// This function is invoked after the inspector has loaded and has a backend target.
+WI.runBootstrapOperations = function() {
+    // Toggle Debug UI setting.
+    new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Option | WI.KeyboardShortcut.Modifier.Shift | WI.KeyboardShortcut.Modifier.CommandOrControl, "D", () => {
+        WI.showDebugUISetting.value = !WI.showDebugUISetting.value;
+    });
+
+    // Reload the Web Inspector.
+    new WI.KeyboardShortcut(WI.KeyboardShortcut.Modifier.Option | WI.KeyboardShortcut.Modifier.Shift | WI.KeyboardShortcut.Modifier.CommandOrControl, "R", () => {
+        InspectorFrontendHost.reopen();
+    });
+
+    // Toggle Inspector Messages Filtering.
+    let ignoreChangesToState = false;
+    const DumpMessagesState = {Off: "off", Filtering: "filtering", Everything: "everything"};
+    const dumpMessagesToolTip = WI.unlocalizedString("Enable dump inspector messages to console.\nShift-click to dump all inspector messages with no filtering.");
+    const dumpMessagesActivatedToolTip = WI.unlocalizedString("Disable dump inspector messages to console");
+    let dumpMessagesTabBarNavigationItem = new WI.ActivateButtonNavigationItem("dump-messages", dumpMessagesToolTip, dumpMessagesActivatedToolTip, "Images/Console.svg");
+
+    function dumpMessagesCurrentState() {
+        if (!InspectorBackend.dumpInspectorProtocolMessages)
+            return DumpMessagesState.Off;
+        if (InspectorBackend.filterMultiplexingBackendInspectorProtocolMessages)
+            return DumpMessagesState.Filtering;
+        return DumpMessagesState.Everything;
+    }
+
+    function applyDumpMessagesState(state) {
+        ignoreChangesToState = true;
+        switch (state) {
+        case DumpMessagesState.Off:
+            InspectorBackend.dumpInspectorProtocolMessages = false;
+            InspectorBackend.filterMultiplexingBackendInspectorProtocolMessages = false;
+            dumpMessagesTabBarNavigationItem.activated = false;
+            dumpMessagesTabBarNavigationItem.element.style.removeProperty("color");
+            break;
+        case DumpMessagesState.Filtering:
+            InspectorBackend.dumpInspectorProtocolMessages = true;
+            InspectorBackend.filterMultiplexingBackendInspectorProtocolMessages = true;
+            dumpMessagesTabBarNavigationItem.activated = true;
+            dumpMessagesTabBarNavigationItem.element.style.removeProperty("color");
+            break;
+        case DumpMessagesState.Everything:
+            InspectorBackend.dumpInspectorProtocolMessages = true;
+            InspectorBackend.filterMultiplexingBackendInspectorProtocolMessages = false;
+            dumpMessagesTabBarNavigationItem.activated = true;
+            dumpMessagesTabBarNavigationItem.element.style.color = "rgb(164, 41, 154)";
+            break;
+        }
+        ignoreChangesToState = false;
+    }
+
+    dumpMessagesTabBarNavigationItem.addEventListener(WI.ButtonNavigationItem.Event.Clicked, function(event) {
+        let nextState;
+        switch (dumpMessagesCurrentState()) {
+        case DumpMessagesState.Off:
+            nextState = WI.modifierKeys.shiftKey ? DumpMessagesState.Everything : DumpMessagesState.Filtering;
+            break;
+        case DumpMessagesState.Filtering:
+            nextState = WI.modifierKeys.shiftKey ? DumpMessagesState.Everything : DumpMessagesState.Off;
+            break;
+        case DumpMessagesState.Everything:
+            nextState = DumpMessagesState.Off;
+            break;
+        }
+        applyDumpMessagesState(nextState);
+    }, dumpMessagesTabBarNavigationItem);
+    WI.settings.protocolAutoLogMessages.addEventListener(WI.Setting.Event.Changed, function(event) {
+        if (ignoreChangesToState)
+            return;
+        applyDumpMessagesState(dumpMessagesCurrentState());
+    }, dumpMessagesTabBarNavigationItem);
+    applyDumpMessagesState(dumpMessagesCurrentState());
+
+    // Next Level Inspector.
+    let inspectionLevel = InspectorFrontendHost.inspectionLevel;
+    const inspectInspectorToolTip = WI.unlocalizedString("Open Web Inspector [%d]").format(inspectionLevel + 1);
+    let inspectInspectorTabBarNavigationItem = new WI.ButtonNavigationItem("inspect-inspector", inspectInspectorToolTip);
+    inspectInspectorTabBarNavigationItem.element.textContent = inspectionLevel + 1;
+    inspectInspectorTabBarNavigationItem.addEventListener(WI.ButtonNavigationItem.Event.Clicked, function(event) {
+        InspectorFrontendHost.inspectInspector();
+    }, inspectInspectorTabBarNavigationItem);
+
+    let groupNavigationItem = new WI.GroupNavigationItem([
+        dumpMessagesTabBarNavigationItem,
+        inspectInspectorTabBarNavigationItem,
+    ]);
+    WI.tabBar.addNavigationItemAfter(groupNavigationItem);
+
+    function setFocusDebugOutline() {
+        document.body.classList.toggle("focus-debug", WI.settings.debugOutlineFocusedElement.value);
+    }
+    WI.settings.debugOutlineFocusedElement.addEventListener(WI.Setting.Event.Changed, setFocusDebugOutline, WI.settings.debugOutlineFocusedElement);
+    setFocusDebugOutline();
+
+    function updateDebugUI() {
+        groupNavigationItem.hidden = !WI.showDebugUISetting.value;
+        WI.tabBar.needsLayout();
+    }
+
+    function updateMockWebExtensionTab() {
+        let mockData = {
+            extensionID: "1234567890ABCDEF",
+            extensionBundleIdentifier: "org.webkit.WebInspector.MockExtension",
+            displayName: WI.unlocalizedString("Mock Extension"),
+            tabName: WI.unlocalizedString("Mock"),
+            tabIconURL: "Images/Info.svg",
+            sourceURL: "Debug/MockWebExtensionTab.html",
+        };
+
+        // Simulates the steps taken by WebInspectorUIExtensionController to create an extension tab in WebInspectorUI.
+        if (!WI.settings.debugShowMockWebExtensionTab.value) {
+            if (WI.sharedApp.extensionController.registeredExtensionIDs.has(mockData.extensionID))
+                InspectorFrontendAPI.unregisterExtension(mockData.extensionID);
+
+            return;
+        }
+
+        let error = InspectorFrontendAPI.registerExtension(mockData.extensionID, mockData.extensionBundleIdentifier, mockData.displayName);
+        if (error) {
+            WI.reportInternalError("Problem creating mock web extension: " + error);
+            return;
+        }
+
+        let result = InspectorFrontendAPI.createTabForExtension(mockData.extensionID, mockData.tabName, mockData.tabIconURL, mockData.sourceURL);
+        if (!result?.extensionTabID) {
+            WI.reportInternalError("Problem creating mock web extension tab: " + result);
+            return;
+        }
+    }
+    WI.settings.debugShowMockWebExtensionTab.addEventListener(WI.Setting.Event.Changed, updateMockWebExtensionTab, WI.settings.debugShowMockWebExtensionTab);
+    updateMockWebExtensionTab();
+
+    WI.showDebugUISetting.addEventListener(WI.Setting.Event.Changed, function(event) {
+        updateDebugUI();
+    }, groupNavigationItem);
+
+    updateDebugUI();
+};

inspector/Debug/CapturingProtocolTracer.js

@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.CapturingProtocolTracer = class CapturingProtocolTracer extends WI.ProtocolTracer
+{
+    constructor()
+    {
+        super();
+
+        this._trace = new WI.ProtocolTrace;
+    }
+
+    // Public
+
+    get trace()
+    {
+        return this._trace;
+    }
+
+    logFrontendException(connection, message, exception)
+    {
+        this._processEntry({type: "exception", message: this._stringifyMessage(message), exception});
+    }
+
+    logFrontendRequest(connection, message)
+    {
+        this._processEntry({type: "request", message: this._stringifyMessage(message)});
+    }
+
+    logDidHandleResponse(connection, message, timings = null)
+    {
+        let entry = {type: "response", message: this._stringifyMessage(message)};
+        if (timings)
+            entry.timings = Object.shallowCopy(timings);
+
+        this._processEntry(entry);
+    }
+
+    logDidHandleEvent(connection, message, timings = null)
+    {
+        let entry = {type: "event", message: this._stringifyMessage(message)};
+        if (timings)
+            entry.timings = Object.shallowCopy(timings);
+
+        this._processEntry(entry);
+    }
+
+    _stringifyMessage(message)
+    {
+        try {
+            return JSON.stringify(message);
+        } catch (e) {
+            console.error("couldn't stringify object:", message, e);
+            return {};
+        }
+    }
+
+    _processEntry(entry)
+    {
+        this._trace.addEntry(entry);
+    }
+};

inspector/Debug/DOMManager.js

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2022 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+Object.defineProperty(WI.DOMManager.prototype, "boundNodesDebugDescription", {
+    get() {
+        let debugDescription = "";
+        function appendLine(line) {
+            debugDescription += line + "\n";
+        }
+
+        const singleLevelSpacePrefix = "    ";
+        function appendChildren(parent, level) {
+            let spacePrefix = singleLevelSpacePrefix.repeat(level + 1);
+
+            for (let child of parent.children) {
+                appendLine(`${spacePrefix}id(${child.id}) displayName(${child.displayName})`);
+
+                for (let pseudoElement of child.pseudoElements().values())
+                    appendLine(`${spacePrefix}${singleLevelSpacePrefix}id(${pseudoElement.id}) displayName(${pseudoElement.displayName})`);
+
+                if (child.children)
+                    appendChildren(child, level + 1);
+            }
+        }
+
+        let rootNodes = Object.values(this._idToDOMNode).filter((value) => !value.parentNode);
+        for (let rootNode of rootNodes) {
+            appendLine(`<${rootNode === this._document ? "Document" : "Detached"} Root> id(${rootNode.id}) displayName(${rootNode.displayName})`);
+            if (rootNode.children)
+                appendChildren(rootNode, 0);
+        }
+
+        return debugDescription;
+    }
+});

inspector/Debug/DebugContentView.css

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.content-view.debug {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    width: 100%;
+    height: 100%;
+    padding: 15px;
+    font-size: 64px;
+    color: var(--text-color-gray-medium);
+}

inspector/Debug/DebugContentView.js

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2017 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.DebugContentView = class DebugContentView extends WI.ContentView
+{
+    constructor(string)
+    {
+        super(new String(string));
+
+        this._string = string;
+
+        this.element.classList.add("debug");
+        this.element.textContent = string;
+    }
+
+    // Protected
+
+    attached()
+    {
+        super.attached();
+        console.debug(`attached: ${this._string}`);
+    }
+
+    detached()
+    {
+        console.debug(`detached: ${this._string}`);
+        super.detached();
+    }
+
+    closed()
+    {
+        console.debug(`closed: ${this._string}`);
+        super.closed();
+    }
+};

inspector/Debug/MockWebExtensionTab.html

@@ -0,0 +1,24 @@
+<html>
+<head>
+<script>
+window._secretValue = {answer:42};
+
+window.getUniqueValue = function() {
+    if (!window._cachedUniqueValue)
+        window._cachedUniqueValue = Math.floor(Math.random() * 10e9);
+
+    return window._cachedUniqueValue;
+}
+
+function initialize() {
+    document.getElementById("uniqueValueField").innerText = window.getUniqueValue();
+};
+</script>
+<body onload="initialize()">
+<h1>This is a test extension.</h1>
+<p>In a normal extension, this area would show the extension's user interface.</p>
+<p>The unique value for this iframe's execution context is:
+    <span id="uniqueValueField">TBD</span>
+</p>
+</body>
+</html>

inspector/Debug/ProtocolTrace.js

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+WI.ProtocolTrace = class ProtocolTrace
+{
+    constructor()
+    {
+        this._entries = [];
+    }
+
+    // Public
+
+    addEntry(entry)
+    {
+        this._entries.push(entry);
+    }
+
+    get saveMode()
+    {
+        return WI.FileUtilities.SaveMode.SingleFile;
+    }
+
+    get saveData()
+    {
+        let now = new Date();
+        let YYYY = now.getFullYear();
+        let MM = now.getMonth() + 1;
+        let DD = now.getDate();
+        let hh = now.getHours();
+        let mm = now.getMinutes();
+        let ss = now.getSeconds();
+
+        // This follows the file name of screen shots on OS X (en-US):
+        // "Protocol Trace 2015-12-31 at 12.43.04.json".
+        // When the Intl API is implemented, we can do a better job.
+        return {
+            content: JSON.stringify(this._entries),
+            suggestedName: WI.unlocalizedString(`Protocol Trace at ${YYYY}-${MM}-${DD} ${hh}.${mm}.${ss}.json`),
+        };
+    }
+};

inspector/Debug/UncaughtExceptionReporter.css

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2015-2020 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+.sheet-container {
+    position: absolute;
+    inset: 0;
+    z-index: var(--z-index-uncaught-exception-sheet);
+    background-color: hsl(0, 0%, 96%);
+    overflow: auto;
+}
+
+.uncaught-exception-sheet {
+    min-width: 400px;
+    margin-inline: 65px 55px;
+    padding: 50px 0;
+    font-family: -webkit-system-font, sans-serif;
+    font-size: 11pt;
+    color: hsl(0, 0%, 40%);
+}
+
+.uncaught-exception-sheet a {
+    text-decoration: underline;
+    color: hsl(240, 55%, 30%);
+    cursor: pointer;
+    font-weight: 500;
+    font-size: 97%;
+}
+.uncaught-exception-sheet a:hover,
+.uncaught-exception-sheet a:active {
+    color: hsl(240, 55%, 25%);
+}
+
+.uncaught-exception-sheet h1,
+.uncaught-exception-sheet h2 {
+    font-size: 24px;
+    line-height: 28px;
+    margin-bottom: 0px;
+    margin-top: 10px;
+    font-weight: normal;
+}
+
+.uncaught-exception-sheet h2 {
+    margin-top: 40px;
+}
+
+.uncaught-exception-sheet h1 > img {
+    position: relative;
+    height: 35px;
+    margin-top: -5px;
+    margin-inline-start: -50px;
+}
+
+body[dir=ltr] .uncaught-exception-sheet h1 > img {
+    float: left;
+}
+
+body[dir=rtl] .uncaught-exception-sheet h1 > img {
+    float: right;
+}
+
+.uncaught-exception-sheet h2 > img {
+    position: relative;
+    height: 25px;
+    margin-top: 0;
+    margin-inline-start: -45px;
+}
+
+body[dir=ltr] .uncaught-exception-sheet h2 > img {
+    float: left;
+}
+
+body[dir=rtl] .uncaught-exception-sheet h2 > img {
+    float: right;
+}
+
+.uncaught-exception-sheet dl {
+    max-width: 600px;
+}
+
+.uncaught-exception-sheet dt {
+    font-style: italic;
+    font-size: 17px;
+}
+
+.uncaught-exception-sheet dd {
+    margin: 10px 0 20px;
+    margin-inline-start: 10px;
+    font-size: 13px;
+    line-height: 18px;
+}
+
+.uncaught-exception-sheet ul {
+    margin: 0;
+    margin-inline-start: 2px;
+    padding: 0;
+    font-family: Menlo, monospace;
+    font-size: 12px;
+    line-height: 18px;
+}
+
+.uncaught-exception-sheet li {
+    margin-bottom: 20px;
+    word-break: break-word;
+    -webkit-user-select: text;
+    white-space: pre;
+}