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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/**
* XML handling functions.
*/
/**
* Convert a DOM node list to a regular list.
*/
function nodeList(n) {
var l = new Array();
if (isNil(n))
return l;
for (var i = 0; i < n.length; i++)
l[i] = n[i];
return l;
}
/**
* Return the child attributes of an element.
*/
function childAttributes(e) {
return filter(function(n) { return n.nodeType == 2; }, nodeList(e.attributes));
}
/**
* Return the child elements of an element.
*/
function childElements(e) {
return filter(function(n) { return n.nodeType == 1; }, nodeList(e.childNodes));
}
/**
* Return the child text nodes of an element.
*/
function childText(e) {
return filter(function(n) { return n.nodeType == 3; }, nodeList(e.childNodes));
}
/**
* Read a list of XML attributes.
*/
function readAttributes(a) {
if (isNil(a))
return a;
return cons(mklist(attribute, "'" + car(a).nodeName, car(a).nodeValue), readAttributes(cdr(a)));
}
/**
* Read an XML element.
*/
function readElement(e) {
var l = append(append(mklist(element, "'" + e.nodeName), readAttributes(childAttributes(e))), readElements(childElements(e)));
var t = childText(e);
if (isNil(t))
return l;
return append(l, mklist(car(t).nodeValue));
}
/**
* Read a list of XML elements.
*/
function readElements(l) {
if (isNil(l))
return l;
return cons(readElement(car(l)), readElements(cdr(l)));
}
/**
* Return true if a list of strings contains an XML document.
*/
function isXML(l) {
if (isNil(l))
return false;
return car(l).substring(0, 5) == '<?xml';
}
/**
* Parse a list of strings representing an XML document.
*/
function parseXML(l) {
var s = writeStrings(l);
if (window.DOMParser) {
var p =new DOMParser();
return p.parseFromString(s, "text/xml");
}
var doc;
try {
doc = new ActiveXObject("MSXML2.DOMDocument");
} catch (e) {
doc = new ActiveXObject("Microsoft.XMLDOM");
}
doc.async = 'false';
doc.loadXML(s);
return doc;
}
/**
* Read a list of values from an XML document.
*/
function readXMLDocument(doc) {
var root = childElements(doc);
if (isNil(root))
return mklist();
return mklist(readElement(car(root)));
}
/**
* Read a list of values from a list of strings representing an XML document.
*/
function readXML(l) {
return readXMLDocument(parseXML(l));
}
/**
* Make an XML document.
*/
/**
* Return a list of strings representing an XML document.
*/
function writeXMLDocument(doc) {
if (typeof(XMLSerializer) != 'undefined')
return mklist(new XMLSerializer().serializeToString(doc));
return mklist(doc.xml);
}
/**
* Write a list of XML element and attribute tokens.
*/
function expandElementValues(n, l) {
if (isNil(l))
return l;
return cons(cons(element, cons(n, car(l))), expandElementValues(n, cdr(l)));
}
function writeList(l, node, doc) {
if (isNil(l))
return node;
var token = car(l);
if (isTaggedList(token, attribute)) {
node.setAttribute(attributeName(token).substring(1), '' + attributeValue(token));
} else if (isTaggedList(token, element)) {
if (elementHasValue(token)) {
var v = elementValue(token);
if (isList(v)) {
var e = expandElementValues(elementName(token), v);
writeList(e, node, doc);
} else {
var child = doc.createElement(elementName(token).substring(1));
writeList(elementChildren(token), child, doc);
node.appendChild(child);
}
} else {
var child = doc.createElement(elementName(token).substring(1));
writeList(elementChildren(token), child, doc);
node.appendChild(child);
}
} else
node.appendChild(doc.createTextNode('' + token));
writeList(cdr(l), node, doc);
return node;
}
/**
* Convert a list of values to a list of strings representing an XML document.
*/
function writeXML(l, xmlTag) {
function mkdoc() {
if (document.implementation && document.implementation.createDocument)
return document.implementation.createDocument('', '', null);
return new ActiveXObject("MSXML2.DOMDocument");
}
var doc = mkdoc();
writeList(l, doc, doc);
if (!xmlTag)
return writeXMLDocument(doc);
return mklist('<?xml version="1.0" encoding="UTF-8"?>\n' + writeXMLDocument(doc) + '\n');
}
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