/*

 * FCKeditor - The text editor for Internet - http://www.fckeditor.net

 * Copyright (C) 2003-2008 Frederico Caldeira Knabben

 *

 * == BEGIN LICENSE ==

 *

 * Licensed under the terms of any of the following licenses at your

 * choice:

 *

 *  - GNU General Public License Version 2 or later (the "GPL")

 *    http://www.gnu.org/licenses/gpl.html

 *

 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")

 *    http://www.gnu.org/licenses/lgpl.html

 *

 *  - Mozilla Public License Version 1.1 or later (the "MPL")

 *    http://www.mozilla.org/MPL/MPL-1.1.html

 *

 * == END LICENSE ==

 *

 * FCKXml Class: class to load and manipulate XML files.

 */



FCKXml.prototype =

{

	LoadUrl : function( urlToCall )

	{

		this.Error = false ;



		var oXml ;

		var oXmlHttp = FCKTools.CreateXmlObject( 'XmlHttp' ) ;

		oXmlHttp.open( 'GET', urlToCall, false ) ;

		oXmlHttp.send( null ) ;



		if ( oXmlHttp.status == 200 || oXmlHttp.status == 304 || ( oXmlHttp.status == 0 && oXmlHttp.readyState == 4 ) )

		{

			oXml = oXmlHttp.responseXML ;

			// #1426: Fallback if responseXML isn't set for some

			// reason (e.g. improperly configured web server)

			if ( !oXml )

				oXml = (new DOMParser()).parseFromString( oXmlHttp.responseText, 'text/xml' ) ;

		}

		else

			oXml = null ;



		if ( oXml )

		{

			// Try to access something on it.

			try

			{

				var test = oXml.firstChild ;

			}

			catch (e)

			{

				// If document.domain has been changed (#123), we'll have a security

				// error at this point. The workaround here is parsing the responseText:

				// http://alexander.kirk.at/2006/07/27/firefox-15-xmlhttprequest-reqresponsexml-and-documentdomain/

				oXml = (new DOMParser()).parseFromString( oXmlHttp.responseText, 'text/xml' ) ;

			}

		}



		if ( !oXml || !oXml.firstChild )

		{

			this.Error = true ;

			if ( window.confirm( 'Error loading "' + urlToCall + '" (HTTP Status: ' + oXmlHttp.status + ').\r\nDo you want to see the server response dump?' ) )

				alert( oXmlHttp.responseText ) ;

		}



		this.DOMDocument = oXml ;

	},



	SelectNodes : function( xpath, contextNode )

	{

		if ( this.Error )

			return new Array() ;



		var aNodeArray = new Array();



		var xPathResult = this.DOMDocument.evaluate( xpath, contextNode ? contextNode : this.DOMDocument,

				this.DOMDocument.createNSResolver(this.DOMDocument.documentElement), XPathResult.ORDERED_NODE_ITERATOR_TYPE, null) ;

		if ( xPathResult )

		{

			var oNode = xPathResult.iterateNext() ;

			while( oNode )

			{

				aNodeArray[aNodeArray.length] = oNode ;

				oNode = xPathResult.iterateNext();

			}

		}

		return aNodeArray ;

	},



	SelectSingleNode : function( xpath, contextNode )

	{

		if ( this.Error )

			return null ;



		var xPathResult = this.DOMDocument.evaluate( xpath, contextNode ? contextNode : this.DOMDocument,

				this.DOMDocument.createNSResolver(this.DOMDocument.documentElement), 9, null);



		if ( xPathResult && xPathResult.singleNodeValue )

			return xPathResult.singleNodeValue ;

		else

			return null ;

	}

} ;

