зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
3.1 KiB
JavaScript
104 строки
3.1 KiB
JavaScript
/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// ----------------------
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// DiffDOM(node1,node2)
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// ----------------------
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var isHTML = false;
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function DiffDOM(node1, node2, aIsHTML)
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{
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isHTML = aIsHTML;
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return DiffNodeAndChildren(node1, node2);
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}
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// namespace attributes in the second node are ignored
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const nsreg = /^xmlns[|:\w]/;
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// This function does the work of DiffDOM by recursively calling
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// itself to explore the tree
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function DiffNodeAndChildren(node1, node2)
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{
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if (!node1 && !node2)
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return true;
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if (!node1 || !node2)
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return ErrorUp("One of the nodes is null", node1, node2);
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if (node1.type!=node2.type)
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return ErrorUp("Different node types", node1, node2);
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var attributes = node2.attributes;
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if (attributes && attributes.length) {
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var item, name, ns, value, otherValue;
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for (var index = 0; index < attributes.length; index++) {
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item = attributes.item(index);
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ns = item.namespaceURI;
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if (ns) {
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name = item.localName;
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otherValue = node2.getAttributeNS(ns, name);
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}
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else {
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name = item.nodeName;
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otherValue = node2.getAttribute(name);
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}
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value = item.nodeValue;
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if (!nsreg.test(name) && otherValue!=value) {
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return ErrorUp("Different values for attribute", node1, node2);
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}
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}
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}
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else if (node1.attributes && node1.attributes.length) {
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return ErrorUp("Different number of attributes", node1, node2);
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}
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if (isHTML) {
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if (node1.nodeName.toLowerCase()!=node2.nodeName.toLowerCase())
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return ErrorUp("Different node names", node1, node2);
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}
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else {
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if (node1.nodeName!=node2.nodeName)
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return ErrorUp("Different node names", node1, node2);
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}
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if (node1.nodeValue!=node2.nodeValue)
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return ErrorUp("Different node values", node1, node2);
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if (!isHTML)
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if (node1.namespaceURI!=node2.namespaceURI)
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return ErrorUp("Different namespace", node1, node2);
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if (node1.hasChildNodes() != node2.hasChildNodes())
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return ErrorUp("Different children", node1, node2);
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if (node1.childNodes) {
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if (node1.childNodes.length != node2.childNodes.length)
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return ErrorUp("Different number of children", node1, node2);
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for (var child = 0; child < node1.childNodes.length; child++) {
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if (!DiffNodeAndChildren(node1.childNodes[child],
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node2.childNodes[child])) {
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return false;
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}
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}
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}
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return true;
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}
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function ErrorUp(errMsg, node1, node2)
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{
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dump("Error: "+errMsg+"\n");
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if (node1) {
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dump("Node 1: "+node1+", ");
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if (node1.nodeType == Node.TEXT_NODE)
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dump("nodeValue: "+node1.nodeValue+"\n");
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else
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dump("nodeName: "+node1.namespaceURI+":"+node1.nodeName+"\n");
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}
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if (node2) {
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dump("Node 2: "+node2+", ");
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if (node2.nodeType == Node.TEXT_NODE)
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dump("nodeValue: "+node2.nodeValue+"\n");
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else
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dump("nodeName: "+node2.namespaceURI+":"+node2.nodeName+"\n");
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}
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return false;
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}
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