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