/*
	Copyright (c) 2004-2006, The Dojo Foundation
	All Rights Reserved.

	Licensed under the Academic Free License version 2.1 or above OR the
	modified BSD license. For more information on Dojo licensing, see:

		http://dojotoolkit.org/community/licensing.shtml
*/

dojo.provide("dojo.xml.XslTransform");
dojo.xml.XslTransform = function (xsltUri) {
	dojo.debug("XslTransform is supported by Internet Explorer and Mozilla, with limited support in Opera 9 (no document function support).");
	var IS_IE = dojo.render.html.ie;
	var ACTIVEX_DOMS = ["Msxml2.DOMDocument.5.0", "Msxml2.DOMDocument.4.0", "Msxml2.DOMDocument.3.0", "MSXML2.DOMDocument", "MSXML.DOMDocument", "Microsoft.XMLDOM"];
	var ACTIVEX_FT_DOMS = ["Msxml2.FreeThreadedDOMDocument.5.0", "MSXML2.FreeThreadedDOMDocument.4.0", "MSXML2.FreeThreadedDOMDocument.3.0"];
	var ACTIVEX_TEMPLATES = ["Msxml2.XSLTemplate.5.0", "Msxml2.XSLTemplate.4.0", "MSXML2.XSLTemplate.3.0"];
	function getActiveXImpl(activeXArray) {
		for (var i = 0; i < activeXArray.length; i++) {
			try {
				var testObj = new ActiveXObject(activeXArray[i]);
				if (testObj) {
					return activeXArray[i];
				}
			}
			catch (e) {
			}
		}
		dojo.raise("Could not find an ActiveX implementation in:\n\n " + activeXArray);
	}
	if (xsltUri == null || xsltUri == undefined) {
		dojo.raise("You must pass the URI String for the XSL file to be used!");
		return false;
	}
	var xsltDocument = null;
	var xsltProcessor = null;
	if (IS_IE) {
		xsltDocument = new ActiveXObject(getActiveXImpl(ACTIVEX_FT_DOMS));
		xsltDocument.async = false;
	} else {
		xsltProcessor = new XSLTProcessor();
		xsltDocument = document.implementation.createDocument("", "", null);
		xsltDocument.addEventListener("load", onXslLoad, false);
	}
	xsltDocument.load(xsltUri);
	if (IS_IE) {
		var xslt = new ActiveXObject(getActiveXImpl(ACTIVEX_TEMPLATES));
		xslt.stylesheet = xsltDocument;
		xsltProcessor = xslt.createProcessor();
	}
	function onXslLoad() {
		xsltProcessor.importStylesheet(xsltDocument);
	}
	function getResultDom(xmlDoc, params) {
		if (IS_IE) {
			addIeParams(params);
			var result = getIeResultDom(xmlDoc);
			removeIeParams(params);
			return result;
		} else {
			return getMozillaResultDom(xmlDoc, params);
		}
	}
	function addIeParams(params) {
		if (!params) {
			return;
		}
		for (var i = 0; i < params.length; i++) {
			xsltProcessor.addParameter(params[i][0], params[i][1]);
		}
	}
	function removeIeParams(params) {
		if (!params) {
			return;
		}
		for (var i = 0; i < params.length; i++) {
			xsltProcessor.addParameter(params[i][0], "");
		}
	}
	function getIeResultDom(xmlDoc) {
		xsltProcessor.input = xmlDoc;
		var outDoc = new ActiveXObject(getActiveXImpl(ACTIVEX_DOMS));
		outDoc.async = false;
		outDoc.validateOnParse = false;
		xsltProcessor.output = outDoc;
		xsltProcessor.transform();
		if (outDoc.parseError.errorCode != 0) {
			var err = outDoc.parseError;
			dojo.raise("err.errorCode: " + err.errorCode + "\n\nerr.reason: " + err.reason + "\n\nerr.url: " + err.url + "\n\nerr.srcText: " + err.srcText);
		}
		return outDoc;
	}
	function getIeResultStr(xmlDoc, params) {
		xsltProcessor.input = xmlDoc;
		xsltProcessor.transform();
		return xsltProcessor.output;
	}
	function addMozillaParams(params) {
		if (!params) {
			return;
		}
		for (var i = 0; i < params.length; i++) {
			xsltProcessor.setParameter(null, params[i][0], params[i][1]);
		}
	}
	function getMozillaResultDom(xmlDoc, params) {
		addMozillaParams(params);
		var resultDoc = xsltProcessor.transformToDocument(xmlDoc);
		xsltProcessor.clearParameters();
		return resultDoc;
	}
	function getMozillaResultStr(xmlDoc, params, parentDoc) {
		addMozillaParams(params);
		var resultDoc = xsltProcessor.transformToFragment(xmlDoc, parentDoc);
		var serializer = new XMLSerializer();
		xsltProcessor.clearParameters();
		return serializer.serializeToString(resultDoc);
	}
	this.getResultString = function (xmlDoc, params, parentDoc) {
		var content = null;
		if (IS_IE) {
			addIeParams(params);
			content = getIeResultStr(xmlDoc, params);
			removeIeParams(params);
		} else {
			content = getMozillaResultStr(xmlDoc, params, parentDoc);
		}
		return content;
	};
	this.transformToContentPane = function (xmlDoc, params, contentPane, parentDoc) {
		var content = this.getResultString(xmlDoc, params, parentDoc);
		contentPane.setContent(content);
	};
	this.transformToRegion = function (xmlDoc, params, region, parentDoc) {
		try {
			var content = this.getResultString(xmlDoc, params, parentDoc);
			region.innerHTML = content;
		}
		catch (e) {
			dojo.raise(e.message + "\n\n xsltUri: " + xsltUri);
		}
	};
	this.transformToDocument = function (xmlDoc, params) {
		return getResultDom(xmlDoc, params);
	};
	this.transformToWindow = function (xmlDoc, params, windowDoc, parentDoc) {
		try {
			windowDoc.open();
			windowDoc.write(this.getResultString(xmlDoc, params, parentDoc));
			windowDoc.close();
		}
		catch (e) {
			dojo.raise(e.message + "\n\n xsltUri: " + xsltUri);
		}
	};
};

