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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.
*/
/**
* Append a list of nodes to a parent node.
*/
function appendNodes(nodes, p) {
if (isNull(nodes))
return p;
p.appendChild(car(nodes));
return appendNodes(cdr(nodes), p);
}
/**
* 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 && n.nodeValue.trim().length != 0; }, nodeList(e.childNodes));
}
/**
* Read a list of XML attributes.
*/
function readAttributes(a) {
if (isNull(a))
return a;
var x = car(a);
return cons(mklist(attribute, "'" + x.name, x.value), readAttributes(cdr(a)));
}
/**
* Read an XML element.
*/
function readElement(e, childf) {
var l = append(append(mklist(element, "'" + e.nodeName), readAttributes(childf(e))), readElements(childElements(e), childf));
var t = childText(e);
if (isNull(t))
return l;
var tv = reduce(function(a, n) { return a + n.nodeValue; }, '', t);
return append(l, mklist(tv));
}
/**
* Read a list of XML elements.
*/
function readElements(l, childf) {
if (isNull(l))
return l;
return cons(readElement(car(l), childf), readElements(cdr(l), childf));
}
/**
* Return true if a list of strings contains an XML document.
*/
function isXML(l) {
if (isNull(l))
return false;
return car(l).substring(0, 5) == '<?xml';
}
/**
* Parse a list of strings representing an XML document.
*/
var xmlParser = new DOMParser();
function parseXML(l) {
var s = writeStrings(l);
return xmlParser.parseFromString(s, "text/xml");
}
/**
* Read a list of values from an XML document.
*/
function readXMLDocument(doc) {
var root = childElements(doc);
if (isNull(root))
return nil;
return mklist(readElement(car(root), childAttributes));
}
/**
* Read a list of values from an XHTML element.
*/
function readXHTMLElement(xhtml) {
return mklist(readElement(xhtml, childAttributes));
}
/**
* Read a list of values from a list of strings representing an XML document.
*/
function readXML(l) {
return readXMLDocument(parseXML(l));
}
/**
* Return a list of strings representing an XML document.
*/
var xmlSerializer = new XMLSerializer();
function writeXMLDocument(doc) {
return mklist(xmlSerializer.serializeToString(doc));
}
/**
* Write a list of XML element and attribute tokens.
*/
function expandElementValues(n, l) {
if (isNull(l))
return l;
return cons(cons(element, cons(n, car(l))), expandElementValues(n, cdr(l)));
}
function writeList(l, node, doc) {
if (isNull(l))
return node;
var token = car(l);
if (isTaggedList(token, attribute)) {
if (isMSIE()) {
var aname = attributeName(token).substring(1);
if (aname != 'xmlns')
node.setAttribute(aname, '' + attributeValue(token));
} else
node.setAttribute(attributeName(token).substring(1), '' + attributeValue(token));
} else if (isTaggedList(token, element)) {
function mkelem(tok, doc) {
function xmlns(l) {
if (isNull(l))
return null;
var t = car(l);
if (isTaggedList(t, attribute)) {
if (attributeName(t).substring(1) == 'xmlns')
return attributeValue(t);
}
return xmlns(cdr(l));
}
var ns = xmlns(elementChildren(tok));
if (isMSIE())
return doc.createElementNS(ns != null? ns : node.namespaceURI, elementName(tok).substring(1));
if (ns == null)
return doc.createElement(elementName(tok).substring(1));
return doc.createElementNS(ns, elementName(tok).substring(1));
}
if (elementHasValue(token)) {
var v = elementValue(token);
if (isList(v)) {
var e = expandElementValues(elementName(token), v);
writeList(e, node, doc);
} else {
var child = mkelem(token, doc);
writeList(elementChildren(token), child, doc);
node.appendChild(child);
}
} else {
var child = mkelem(token, doc);
writeList(elementChildren(token), child, doc);
node.appendChild(child);
}
} else
node.appendChild(doc.createTextNode('' + token));
writeList(cdr(l), node, doc);
return node;
}
/**
* Make a new XML document.
*/
function mkXMLDocument() {
return document.implementation.createDocument('', '', null);
}
/**
* Convert a list of values to a list of strings representing an XML document.
*/
function writeXML(l, xmlTag) {
var doc = mkXMLDocument();
writeList(l, doc, doc);
if (!xmlTag)
return writeXMLDocument(doc);
return mklist('<?xml version="1.0" encoding="UTF-8"?>\n' + car(writeXMLDocument(doc)) + '\n');
}
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