# language: JSVM2

/**
 * @fileoverview com.eae.webfx.xtree.WebFXUtil class {@link http://jsvm.homolo.com/}
 * @file		WebFXUtil.jsc
 * @author	Emil A Eklund
 * @Modifier: Changhua Wan * @version	1.1, 07/01/05
 */

package com.eae.webfx.xtree;

import js.lang.BObject;

import com.eae.webfx.xtree.WebFXTreeConfig;
import com.eae.webfx.xtree.WebFXTreeHandler;

/** * Create a new WebFXUtil instance.
 * Inherit from BObject
 * @author	Emil A Eklund (Modified by Wan Changhua) * @version	1.1, 07/01/05 * @extends BObject * @class This is an utility class.  
 * @constructor
 * @return A new WebFXUtil object
 */

class WebFXUtil extends BObject ()
{
}


/**
 * start load data from xml
 * @param {String} sSrc the url of xml
 * @param {WebFXLoadTreeItem} jsNode
 */
WebFXUtil.startLoadXmlTree = function (sSrc, jsNode)
{
	if (jsNode.loading || jsNode.loaded)
	{
		return;
	}
	jsNode.loading = true;
	var xmlHttp = Class.forName("js.net.XmlHttp").create();
	xmlHttp.open("GET", sSrc, true);	// async
	xmlHttp.onreadystatechange = function ()
	{
		if (xmlHttp.readyState == 4)
		{
			WebFXUtil.xmlFileLoaded(xmlHttp.responseXML, jsNode, sSrc);
		}
	};
	// call in new thread to allow ui to update
	window.setTimeout(function () {
		xmlHttp.send(null);
		}, 10);
}

/**
 * parse template string
 * @param {String} sTemplate
 * @returns the parse result 
 * @type String
 */
WebFXUtil.parseTemplateString = function (sTemplate)
{
	var args = arguments;
	var s = sTemplate;

	s = s.replace(/\%\%/g, "%");

	for (var i = 1; i < args.length; i++)
		s = s.replace( new RegExp("\%" + i + "\%", "g"), args[i] )

	return s;
}

/**
 * @private
 */
WebFXUtil.xmlFileLoaded = function (oXmlDoc, jsParentNode,sSrc)
{
	if (jsParentNode.loaded)
		return;

	var bIndent = false;
	var bAnyChildren = false;
	jsParentNode.loaded = true;
	jsParentNode.loading = false;
	//if xmlHTTP load faild. use XmlDocument to load it;
	if(oXmlDoc == null|| oXmlDoc.documentElement == null){
		try{
			//oXmlDoc = XmlDocument.create();
			oXmlDoc = Class.forName("js.net.XmlDom").create();
			oXmlDoc.load(sSrc);
		}catch(ex){
			oXmlDoc = null;
		}
	}
	// check that the load of the xml file went well
	if( oXmlDoc == null || oXmlDoc.documentElement == null)
	{
		jsParentNode.errorText = WebFXUtil.parseTemplateString(WebFXTreeConfig.loadErrorTextTemplate,
							jsParentNode.src);

	}
	else {
		// there is one extra level of tree elements
		var root = oXmlDoc.documentElement;

		// loop through all tree children
		var cs = root.childNodes;
		var l = cs.length;
		for (var i = 0; i < l; i++)
		{
			if (cs[i].tagName == "TreeNode")
			{
				bAnyChildren = true;
				bIndent = true;
				jsParentNode.add( WebFXUtil.xmlTreeToJsTree(cs[i]), true);
			}
		}

		// if no children we got an error
		if (!bAnyChildren)
			jsParentNode.errorText = WebFXUtil.parseTemplateString(WebFXTreeConfig.emptyErrorTextTemplate,
										jsParentNode.src);
	}

	// remove dummy
	if (jsParentNode._loadingItem != null) {
		jsParentNode._loadingItem.remove();
		bIndent = true;
	}

	if (bIndent) {
		// indent now that all items are added
		//jsParentNode.indent();
	}

	// show error in status bar
	if (jsParentNode.errorText != "")
		window.status = jsParentNode.errorText;
}

/**
 * transform a xmltree to a js tree
 * @param {node} oNode
 */
WebFXUtil.xmlTreeToJsTree = function (oNode)
{
	// retreive attributes
	var text = oNode.getAttribute("text");
	var action = oNode.getAttribute("action");
	var parent = null;
	var icon = oNode.getAttribute("icon");
	var openIcon = oNode.getAttribute("openIcon");
	var src = oNode.getAttribute("src");
	var target = oNode.getAttribute("target");

	var sRadio = oNode.getAttribute("radio");
	var sCheckbox = oNode.getAttribute("checkbox");
	var sValue = oNode.getAttribute("value");
	var sChecked = oNode.getAttribute("checked");

	// create jsNode
	var jsNode;
	if (src != null && src != "")
	{
		jsNode = Class.forName("com.eae.webfx.xtree.WebFXLoadTreeItem").newInstance(
			text, src, action, parent, icon, openIcon,sRadio,sCheckbox,sValue,sChecked);
	}
	else
	{
		jsNode = Class.forName("com.eae.webfx.xtree.WebFXTreeItem").newInstance(
			text, action, parent, icon, openIcon,sRadio,sCheckbox,sValue,sChecked);
	}

	if (target != "")
	{
		jsNode.target = target;
	}
	// go through childNOdes
	var cs = oNode.childNodes;
	var l = cs.length;
	for (var i = 0; i < l; i++)
	{
		if (cs[i].tagName == "TreeNode")
			jsNode.add( WebFXUtil.xmlTreeToJsTree(cs[i]), true );
	}
	return jsNode;
}