106 lines
4.4 KiB
JavaScript
106 lines
4.4 KiB
JavaScript
/*
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* Copyright (C) 2018 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. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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// 1()RenderView|2(1)RenderBlock|3(2)RenderBody|4(3)RenderBlock|5(3)AnonymousRenderBlock|
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class TreeBuilder {
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createTree(document, renderTreeDump) {
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// Root.
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let initialBlockContainer = new Layout.BlockContainer(document, parseInt(renderTreeDump.substring(0, renderTreeDump.indexOf("("))));
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initialBlockContainer.setRendererName("RenderView");
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renderTreeDump = renderTreeDump.substring(renderTreeDump.indexOf("|") + 1);
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while (true) {
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let endOfId = renderTreeDump.indexOf("(");
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let boxId = parseInt(renderTreeDump.substring(0, endOfId));
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let endOfParentId = renderTreeDump.indexOf(")");
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let parentId = parseInt(renderTreeDump.substring(endOfId + 1, endOfParentId));
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let endOfName = renderTreeDump.indexOf("|");
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let name = renderTreeDump.substring(endOfParentId + 1, endOfName);
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this._createAndAttachBox(initialBlockContainer, boxId, name, parentId);
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if (endOfName == renderTreeDump.length - 1)
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break;
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renderTreeDump = renderTreeDump.substring(endOfName + 1);
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}
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return initialBlockContainer;
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}
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_createAndAttachBox(initialBlockContainer, id, name, parentId) {
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let box = null;
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let text = null;
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let node = this._findNode(initialBlockContainer.node(), id, name);
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if (name == "RenderBlock" || name == "RenderBody")
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box = new Layout.BlockContainer(node, id);
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else if (name == "RenderInline")
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box = new Layout.InlineContainer(node, id);
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else if (name == "RenderText")
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text = new Text(node, id);
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else if (name == "RenderImage")
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box = new Layout.InlineBox(node, id);
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else
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box = new Layout.Box(node, id);
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if (box)
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box.setRendererName(name);
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let parentBox = Utils.layoutBoxById(parentId, initialBlockContainer);
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// WebKit does not construct anonymous inline container for text if the text
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// is a direct child of a block container.
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if (text) {
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box = new Layout.InlineBox(null, -1);
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box.setIsAnonymous();
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box.setText(text);
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}
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this._appendChild(parentBox, box);
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return box;
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}
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_appendChild(parent, child) {
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child.setParent(parent);
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let firstChild = parent.firstChild();
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if (!firstChild) {
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parent.setFirstChild(child);
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parent.setLastChild(child);
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return;
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}
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let lastChild = parent.lastChild();
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lastChild.setNextSibling(child);
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child.setPreviousSibling(lastChild);
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parent.setLastChild(child);
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}
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_findNode(node, boxId) {
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// Super inefficient but this is all temporary anyway.
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for (let currentNode = node.firstChild; currentNode; currentNode = currentNode.nextSibling) {
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if (currentNode.rendererId == boxId)
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return currentNode;
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let candidate = this._findNode(currentNode, boxId);
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if (candidate)
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return candidate;
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}
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}
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}
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