egroupware/etemplate/js/et2_core_xml.js

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/**
* EGroupware eTemplate2 - JS XML Code
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage api
* @link http://www.egroupware.org
* @author Andreas Stöckel
* @copyright Stylite 2011
* @version $Id$
*/
"use strict";
/**
* Loads the given URL asynchronously from the server. When the file is loaded,
* the given callback function is called, where "this" is set to the given
* context.
*/
function et2_loadXMLFromURL(_url, _callback, _context)
{
if (typeof _context == "undefined")
{
_context = null;
}
// Use the XMLDOM object on IE
if (window.ActiveXObject)
{
var xmldoc = new ActiveXObject("Microsoft.XMLDOM");
// Set the callback function
xmldoc.onreadystatechange = function() {
if (xmldoc && xmldoc.readyState == 4)
{
// Find the root node - the root node is the node which is not
// the "xml", not a text node and not a comment node - those nodes
// are marked with an "#"
for (var i = 0; i < xmldoc.childNodes.length; i++)
{
var nodeName = xmldoc.childNodes[i].nodeName;
if (nodeName != "xml" && nodeName.charAt(0) != "#")
{
// Call the callback function and pass the current node
_callback.call(_context, xmldoc.childNodes[i]);
return;
}
}
throw("Could not find XML root node.");
}
}
xmldoc.load(_url);
}
else if (window.XMLHttpRequest)
{
// Otherwise make an XMLHttpRequest. Tested with Firefox 3.6, Chrome, Opera
var xmlhttp = new XMLHttpRequest();
// Set the callback function
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == 4)
{
if(xmlhttp.responseXML)
{
var xmldoc = xmlhttp.responseXML.documentElement;
_callback.call(_context, xmldoc);
}
// Sometimes it's not recogized as XML - reason unknown
else if (xmlhttp.response)
{
egw().debug("log","File was not recogized as XML, trying to parse text...");
var response = xmlhttp.response.replace(/^\s+|\s+$/g,'');
// Manually parse from text
var parser = new DOMParser();
try {
var xmldoc = parser.parseFromString(response, "text/xml");
egw().debug("log","Parsed OK");
_callback.call(_context, xmldoc.documentElement);
} catch (e) {
egw().debug("log", "Well, that didn't work");
}
}
}
}
// Force the browser to interpret the result as XML. overrideMimeType is
// non-standard, so we check for its existance.
if (xmlhttp.overrideMimeType)
{
xmlhttp.overrideMimeType("application/xml");
}
// Retrieve the script asynchronously
xmlhttp.open("GET", _url, true);
xmlhttp.send(null);
}
else
{
throw("XML Request object could not be created!");
}
}
function et2_directChildrenByTagName(_node, _tagName)
{
// Normalize the tag name
_tagName = _tagName.toLowerCase();
var result = [];
for (var i = 0; i < _node.childNodes.length; i++)
{
if (_tagName == _node.childNodes[i].nodeName.toLowerCase())
{
result.push(_node.childNodes[i]);
}
}
return result;
}
function et2_filteredNodeIterator(_node, _callback, _context)
{
for (var i = 0; i < _node.childNodes.length; i++)
{
var node = _node.childNodes[i];
var nodeName = node.nodeName.toLowerCase();
if (nodeName.charAt(0) != "#")
{
_callback.call(_context, node, nodeName);
}
}
}
function et2_readAttrWithDefault(_node, _name, _default)
{
var val = _node.getAttribute(_name);
return (val === null) ? _default : val;
}