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