Andrew Zambazos
271 lines
9.3 KiB
JavaScript
271 lines
9.3 KiB
JavaScript
/*
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* Copyright (C) 2013, 2015 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.CompletionSuggestionsView = class CompletionSuggestionsView extends WI.Object
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{
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constructor(delegate, {preventBlur} = {})
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{
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super();
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this._delegate = delegate || null;
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this._preventBlur = preventBlur || false;
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this._completions = [];
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this._selectedIndex = NaN;
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this._moveIntervalIdentifier = null;
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this._element = document.createElement("div");
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this._element.setAttribute("dir", "ltr");
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this._element.classList.add("completion-suggestions", WI.Popover.IgnoreAutoDismissClassName);
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this._containerElement = document.createElement("div");
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this._containerElement.classList.add("completion-suggestions-container");
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this._containerElement.addEventListener("mousedown", this._mouseDown.bind(this));
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this._containerElement.addEventListener("mouseup", this._mouseUp.bind(this));
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this._containerElement.addEventListener("click", this._itemClicked.bind(this));
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this._element.appendChild(this._containerElement);
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}
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// Public
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get delegate()
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{
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return this._delegate;
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}
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get visible()
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{
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return !!this._element.parentNode;
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}
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get selectedIndex()
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{
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return this._selectedIndex;
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}
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set selectedIndex(index)
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{
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var selectedItemElement = this._selectedItemElement;
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if (selectedItemElement)
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selectedItemElement.classList.remove("selected");
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this._selectedIndex = index;
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selectedItemElement = this._selectedItemElement;
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if (selectedItemElement) {
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selectedItemElement.classList.add("selected");
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selectedItemElement.scrollIntoViewIfNeeded(false);
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}
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if (this._completions[this._selectedIndex])
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this._delegate?.completionSuggestionsSelectedCompletion?.(this, WI.CSSCompletions.getCompletionText(this._completions[this._selectedIndex]));
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}
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selectNext()
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{
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var count = this._containerElement.children.length;
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if (isNaN(this._selectedIndex) || this._selectedIndex === count - 1)
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this.selectedIndex = 0;
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else
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++this.selectedIndex;
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}
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selectPrevious()
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{
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if (isNaN(this._selectedIndex) || this._selectedIndex === 0)
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this.selectedIndex = this._containerElement.children.length - 1;
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else
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--this.selectedIndex;
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}
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isHandlingClickEvent()
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{
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return this._mouseIsDown;
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}
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show(anchorBounds)
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{
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// Measure the container so we can know the intrinsic size of the items.
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let intrinsicSize = WI.measureElement(this._containerElement);
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let containerWidth = Math.ceil(intrinsicSize.width);
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let containerHeight = Math.ceil(intrinsicSize.height);
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// Lay out the suggest-box relative to the anchorBounds.
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let margin = 10;
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let absoluteMaximumHeight = 160;
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let x = anchorBounds.origin.x;
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let y = anchorBounds.origin.y + anchorBounds.size.height;
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let maximumWidth = window.innerWidth - anchorBounds.origin.x - margin;
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let width = Math.min(containerWidth, maximumWidth);
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if (width < containerWidth) {
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// Shift the suggest box to the left to accommodate the content without trimming to the BODY edge.
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maximumWidth = window.innerWidth - margin;
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width = Math.min(containerWidth, maximumWidth);
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x = document.body.offsetWidth - width;
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}
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let aboveHeight = anchorBounds.origin.y;
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let underHeight = window.innerHeight - anchorBounds.origin.y - anchorBounds.size.height;
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let maximumHeight = Math.min(absoluteMaximumHeight, Math.max(underHeight, aboveHeight) - margin);
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let height = Math.min(containerHeight, maximumHeight);
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// Position the suggestions below the anchor. If there is no room, position the suggestions above.
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if (underHeight - height < 0)
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y = aboveHeight - height;
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this._element.style.left = x + "px";
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this._element.style.top = y + "px";
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this._element.style.width = width + "px";
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this._element.style.height = height + "px";
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if (!this._element.parentNode)
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document.body.appendChild(this._element);
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}
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hide()
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{
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this._element.remove();
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this._stopMoveTimer();
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}
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hideWhenElementMoves(element)
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{
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this._stopMoveTimer();
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let initialClientRect = element.getBoundingClientRect();
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this._moveIntervalIdentifier = setInterval(() => {
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let clientRect = element.getBoundingClientRect();
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if (clientRect.x !== initialClientRect.x || clientRect.y !== initialClientRect.y)
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this.hide();
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}, 200);
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}
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update(completions, selectedIndex)
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{
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this._containerElement.removeChildren();
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this._completions = completions;
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if (typeof selectedIndex === "number")
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this._selectedIndex = selectedIndex;
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for (let [index, completion] of completions.entries()) {
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var itemElement = document.createElement("div");
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itemElement.classList.add("item");
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itemElement.classList.toggle("selected", index === this._selectedIndex);
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if (typeof completion === "string")
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itemElement.textContent = completion;
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else if (completion instanceof WI.QueryResult)
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itemElement.appendChild(this._createMatchedCompletionFragment(completion.value, completion.matchingTextRanges));
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this._containerElement.appendChild(itemElement);
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this._delegate?.completionSuggestionsViewCustomizeCompletionElement?.(this, itemElement, completion);
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}
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}
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// Private
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get _selectedItemElement()
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{
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if (isNaN(this._selectedIndex))
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return null;
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var element = this._containerElement.children[this._selectedIndex] || null;
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console.assert(element);
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return element;
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}
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_createMatchedCompletionFragment(completionText, matchingTextRanges)
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{
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let completionFragment = document.createDocumentFragment();
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let lastIndex = 0;
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for (let textRange of matchingTextRanges) {
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console.assert(textRange.startColumn >= 0 && textRange.startColumn < completionText.length, textRange);
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console.assert(textRange.endColumn > 0 && textRange.endColumn <= completionText.length, textRange);
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console.assert(textRange.startColumn < textRange.endColumn);
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if (textRange.startColumn > lastIndex)
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completionFragment.append(completionText.substring(lastIndex, textRange.startColumn));
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let matchedSpan = document.createElement("span");
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matchedSpan.classList.add("matched");
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matchedSpan.append(completionText.substring(textRange.startColumn, textRange.endColumn));
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completionFragment.append(matchedSpan);
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lastIndex = textRange.endColumn;
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}
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if (lastIndex < completionText.length)
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completionFragment.append(completionText.substring(lastIndex, completionText.length));
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return completionFragment;
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}
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_mouseDown(event)
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{
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if (event.button !== 0)
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return;
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if (this._preventBlur)
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event.preventDefault();
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this._mouseIsDown = true;
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}
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_mouseUp(event)
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{
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if (event.button !== 0)
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return;
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this._mouseIsDown = false;
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}
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_itemClicked(event)
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{
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if (event.button !== 0)
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return;
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let itemElement = event.target.closest(".item");
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console.assert(itemElement);
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if (!itemElement)
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return;
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if (this._delegate && typeof this._delegate.completionSuggestionsClickedCompletion === "function")
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this._delegate.completionSuggestionsClickedCompletion(this, itemElement.textContent);
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}
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_stopMoveTimer()
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{
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if (!this._moveIntervalIdentifier)
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return;
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clearInterval(this._moveIntervalIdentifier);
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this._moveIntervalIdentifier = null;
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}
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};
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