//Author: Richard Heyes <richard@phpguru.org>, Harald Radi <harald.radi@nme.at>  
//Copyright (c) 2002-2005, Richard Heyes, Harald Radi All rights reserved.
// $Id: TreeMenu.js,v 1.21 2005/03/02 02:39:26 richard Exp $

function arrayCopy(input){
	var output = new Array(input.length);
	for (i in input) {
		if (typeof(input[i]) == 'array'){output[i] = arrayCopy(input[i]);}
		else {output[i] = input[i];}
	}
return output;
}
function TreeMenu(iconpath, myname, linkTarget, defaultClass, usePersistence, noTopLevelImages){
	this.iconpath=iconpath;
	this.myname = myname;
	this.linkTarget = linkTarget;
	this.defaultClass=defaultClass;
	this.usePersistence= usePersistence;
	this.noTopLevelImages = noTopLevelImages;
	this.n= new Array();this.output = '';
	this.nodeRefs = new Array();
	this.branches=new Array();
	this.branchStatus= new Array();
	this.layerRelations = new Array();
	this.childParents= new Array();
	this.cookieStatuses = new Array();
	this.preloadImages();
	}
TreeMenu.prototype.addItem = function (newNode){
	newIndex = this.n.length;this.n[newIndex] = newNode;
	return this.n[newIndex];
	}

TreeMenu.prototype.preloadImages = function ()
	{
		var plustop    = new Image; plustop.src    = this.iconpath + '/plustop.gif';
		var plusbottom = new Image; plusbottom.src = this.iconpath + '/plusbottom.gif';
		var plus       = new Image; plus.src       = this.iconpath + '/plus.gif';	
		var minustop    = new Image; minustop.src    = this.iconpath + '/minustop.gif';
		var minusbottom = new Image; minusbottom.src = this.iconpath + '/minusbottom.gif';
		var minus       = new Image; minus.src       = this.iconpath + '/minus.gif';	
		var branchtop    = new Image; branchtop.src    = this.iconpath + '/branchtop.gif';
		var branchbottom = new Image; branchbottom.src = this.iconpath + '/branchbottom.gif';
		var branch       = new Image; branch.src       = this.iconpath + '/branch.gif';	
		var linebottom = new Image; linebottom.src = this.iconpath + '/linebottom.gif';
		var line       = new Image; line.src       = this.iconpath + '/line.gif';
	}
TreeMenu.prototype.drawMenu = function ()
	{var output   = '';var modifier = '';var layerID  = '';
		var parentLayerID = '';	var nodes   = arguments[0] ? arguments[0] : this.n
		var level         = arguments[1] ? arguments[1] : [];	var prepend       = arguments[2] ? arguments[2] : '';
		var expanded      = arguments[3] ? arguments[3] : false;	var visibility    = arguments[4] ? arguments[4] : 'inline';
		var parentLayerID = arguments[5] ? arguments[5] : null;	var currentlevel  = level.length;
		for (var i=0; i<nodes.length; i++) {		
			level[currentlevel] = i+1;
			layerID = this.myname + '_' + 'node_' + this.implode('_', level);
			this.nodeRefs[layerID] = nodes[i];this.childParents[layerID] = parentLayerID;	
			if (i == 0 && parentLayerID == null){
				modifier = nodes.length > 1 ? "top" : 'single';
			} else if(i == (nodes.length-1)) {
				modifier = "bottom";
			} else {
				modifier = "";
			}

			if (!this.doesMenu() || (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages))) {
				expanded = true;	
			} else if (nodes[i].expanded) {
				expanded = true;	
			} else {
				expanded = false;
			}
			visibility =  this.checkParentVisibility(layerID) ? visibility : 'none';
			if (nodes[i].n.length > 0) {
				this.branchStatus[layerID] = expanded;
				this.branches[this.branches.length] = layerID;
			}

			if (!this.layerRelations[parentLayerID]) {
				this.layerRelations[parentLayerID] = new Array();
			}
			this.layerRelations[parentLayerID][this.layerRelations[parentLayerID].length] = layerID;
			var gifname  = nodes[i].n.length && this.doesMenu() && nodes[i].isDynamic ? (expanded ? 'minus' : 'plus') : 'branch';
			var iconName = expanded && nodes[i].expandedIcon ? nodes[i].expandedIcon : nodes[i].icon;
			var iconimg  = nodes[i].icon ? this.stringFormat('<img src="{0}/{1}" width="20" height="20" align="top" id="icon_{2}">', this.iconpath, iconName, layerID) : '';
			var eventHandlers = "";for (j in nodes[i].events){eventHandlers += this.stringFormat('{0}="{1}" ', j, nodes[i].events[j]);}
			var layerTag  = this.doesMenu() ? this.stringFormat('<div id="{0}" style="display: {1}" class="{2}">', layerID, visibility, (nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass)) : this.stringFormat('<div class="{0}">', nodes[i].cssClass ? nodes[i].cssClass : this.defaultClass);
			var onMDown   = this.doesMenu() && nodes[i].n.length  && nodes[i].isDynamic ? this.stringFormat('onmousedown="{0}.toggleBranch(\'{1}\', true)" style="cursor: pointer; cursor: hand"', this.myname, layerID) : '';
			var imgTag    = this.stringFormat('<img src="{0}/{1}{2}.gif" width="20" height="20" align="top" border="0" name="img_{3}" {4}>', this.iconpath, gifname, modifier, layerID, onMDown);
			var linkTarget= nodes[i].linkTarget ? nodes[i].linkTarget : this.linkTarget;
			var linkStart = nodes[i].link ? this.stringFormat('<a href="{0}" target="{1}">', nodes[i].link, linkTarget) : '';
			var linkEnd   = nodes[i].link ? '</a>' : '';
			this.output += this.stringFormat('{0}<nobr>{1}{2}{3}{4}<span {5}>{6}</span>{7}</nobr><br></div>',
			                  layerTag,
							  prepend,
			                  parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages) ? '' : imgTag,
							  iconimg,
							  linkStart,
							  eventHandlers,
							  nodes[i].title,
							  linkEnd);

			if (nodes[i].n.length) {
				if (parentLayerID == null && (nodes.length == 1 || this.noTopLevelImages)) {
					var newPrepend = '';	
				} else if (i < (nodes.length - 1)) {
					var newPrepend = prepend + this.stringFormat('<img src="{0}/line.gif" width="20" height="20" align="top">', this.iconpath);
	
				} else {
					var newPrepend = prepend + this.stringFormat('<img src="{0}/linebottom.gif" width="20" height="20" align="top">', this.iconpath);
				}

				this.drawMenu(nodes[i].n,
				              arrayCopy(level),
				              newPrepend,
				              nodes[i].expanded,
				              expanded ? 'inline' : 'none',
				              layerID);
			}
		}
	}
	TreeMenu.prototype.writeOutput = function (){document.write(this.output);}
	TreeMenu.prototype.toggleBranch = function (layerID, updateStatus)	{
		var currentDisplay = this.getLayer(layerID).style.display;
		var newDisplay     = (this.branchStatus[layerID] && currentDisplay == 'inline') ? 'none' : 'inline';
		var fireEvents     = arguments[2] != null ? arguments[2] : true;
		for (var i=0; i<this.layerRelations[layerID].length; i++) {
			if (this.branchStatus[this.layerRelations[layerID][i]]) {
				this.toggleBranch(this.layerRelations[layerID][i], false);}	
			this.getLayer(this.layerRelations[layerID][i]).style.display = newDisplay;}	
		if (updateStatus) {	this.branchStatus[layerID] = !this.branchStatus[layerID];
			if (this.doesPersistence() && !arguments[2] && this.usePersistence){
				this.setExpandedStatusForCookie(layerID, this.branchStatus[layerID]);}
			if (fireEvents) {
				nodeObject = this.nodeRefs[layerID];	
				if (nodeObject.ontoggle != null) {
					eval(nodeObject.ontoggle);
				}
				
				if (newDisplay == 'none' && nodeObject.oncollapse != null) {
					eval(nodeObject.oncollapse);
				} else if (newDisplay == 'inline' && nodeObject.onexpand != null){
					eval(nodeObject.onexpand);
				}
			}
			this.swapImage(layerID);
		}
		this.swapIcon(layerID);
	}

	TreeMenu.prototype.swapImage = function (layerID)
	{
		var imgSrc = document.images['img_' + layerID].src;	
		var re = /^(.*)(plus|minus)(bottom|top|single)?.gif$/
		if (matches = imgSrc.match(re)) {	
			document.images['img_' + layerID].src = this.stringFormat('{0}{1}{2}{3}',
			                                                matches[1],
															matches[2] == 'plus' ? 'minus' : 'plus',
															matches[3] ? matches[3] : '',
															'.gif');
		}
	}

	TreeMenu.prototype.swapIcon = function (layerID)
	{
		if (document.images['icon_' + layerID]) {
			var imgSrc = document.images['icon_' + layerID].src;	
			if (this.nodeRefs[layerID].icon && this.nodeRefs[layerID].expandedIcon) {
				var newSrc = (imgSrc.indexOf(this.nodeRefs[layerID].expandedIcon) == -1 ? this.nodeRefs[layerID].expandedIcon : this.nodeRefs[layerID].icon);	
				document.images['icon_' + layerID].src = this.iconpath + '/' + newSrc;
			}
		}
	}

	TreeMenu.prototype.doesMenu = function ()
	{
		return (is_ie4up || is_nav6up || is_gecko || is_opera7);
	}

	TreeMenu.prototype.doesPersistence = function ()
	{
		return (is_ie4up || is_gecko || is_nav6up || is_opera7);
	}

	TreeMenu.prototype.getLayer = function (layerID)
	{
		if (is_ie4) {
			return document.all(layerID);	
		} else if (document.getElementById(layerID)) {
			return document.getElementById(layerID);	
		} else if (document.all && document.all(layerID)) {
			return document.all(layerID);
		}
	}

	TreeMenu.prototype.setExpandedStatusForCookie = function (layerID, expanded)
	{
		this.cookieStatuses[layerID] = expanded;this.saveCookie();
	}
	TreeMenu.prototype.getExpandedStatusFromCookie = function (layerID)
	{
		if (this.cookieStatuses[layerID]) {
			return this.cookieStatuses[layerID];
		}
		return false;
	}
	TreeMenu.prototype.saveCookie = function ()
	{
		var cookieString = new Array();
		for (var i in this.cookieStatuses) {
			if (this.cookieStatuses[i] == true) {
				cookieString[cookieString.length] = i;
			}
		}
		
		document.cookie = 'TreeMenuBranchStatus=' + cookieString.join(':');
	}

	TreeMenu.prototype.loadCookie = function ()
	{
		var cookie = document.cookie.split('; ');
		for (var i=0; i < cookie.length; i++) {
			var crumb = cookie[i].split('=');
			if ('TreeMenuBranchStatus' == crumb[0] && crumb[1]) {
				var expandedBranches = crumb[1].split(':');
				for (var j=0; j<expandedBranches.length; j++) {
					this.cookieStatuses[expandedBranches[j]] = true;
				}
			}
		}
	}

	TreeMenu.prototype.resetBranches = function ()
	{
		if (!this.doesPersistence()) {
			return false;
		}		
		this.loadCookie();
		for (var i=0; i<this.branches.length; i++) {
			var status = this.getExpandedStatusFromCookie(this.branches[i]);
			if (status == true && this.branchStatus[this.branches[i]] != true) {
				if (this.checkParentVisibility(this.branches[i])) {
					this.toggleBranch(this.branches[i], true, false);
				} else {
					this.branchStatus[this.branches[i]] = true;
					this.swapImage(this.branches[i]);
				}
			}
		}
	}

	TreeMenu.prototype.checkParentVisibility = function (layerID)
	{
		if (this.in_array(this.childParents[layerID], this.branches)
		    && this.branchStatus[this.childParents[layerID]]
			&& this.checkParentVisibility(this.childParents[layerID]) ) {			
			return true;	
		} else if (this.childParents[layerID] == null) {
			return true;
		}		
		return false;
	}

	TreeMenu.prototype.stringFormat = function (strInput)
	{
		var idx = 0;	
		for (var i=1; i<arguments.length; i++) {
			while ((idx = strInput.indexOf('{' + (i - 1) + '}', idx)) != -1) {
				strInput = strInput.substring(0, idx) + arguments[i] + strInput.substr(idx + 3);
			}
		}		
		return strInput;
	}

	TreeMenu.prototype.implode = function (seperator, input)
	{
		var output = '';	
		for (var i=0; i<input.length; i++) {
			if (i == 0) {
				output += input[i];
			} else {
				output += seperator + input[i];
			}
		}		
		return output;
	}

	TreeMenu.prototype.in_array = function (item, arr)
	{
		for (var i=0; i<arr.length; i++) {
			if (arr[i] == item) {
				return true;
			}
		}	
		return false;
	}

	function TreeNode(title, icon, link, expanded, isDynamic, cssClass, linkTarget, expandedIcon)
	{
		this.title        = title;
		this.icon         = icon;
		this.expandedIcon = expandedIcon;
		this.link         = link;
		this.expanded     = expanded;
		this.isDynamic    = isDynamic;
		this.cssClass     = cssClass;
		this.linkTarget   = linkTarget;
		this.n            = new Array();
		this.events       = new Array();
		this.handlers     = null;
		this.oncollapse   = null;
		this.onexpand     = null;
		this.ontoggle     = null;
	}

	TreeNode.prototype.addItem = function (newNode)
	{
		newIndex = this.n.length;
		this.n[newIndex] = newNode;		
		return this.n[newIndex];
	}

	TreeNode.prototype.setEvent = function (eventName, eventHandler)
	{
		switch (eventName.toLowerCase()) {
			case 'onexpand':
				this.onexpand = eventHandler;
				break;
			case 'oncollapse':
				this.oncollapse = eventHandler;
				break;
			case 'ontoggle':
				this.ontoggle = eventHandler;
				break;
			default:
				this.events[eventName] = eventHandler;
		}
	}
 var agt=navigator.userAgent.toLowerCase();
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_nav6up = (is_nav && (is_major >= 5));
    var is_gecko = (agt.indexOf('gecko') != -1);
    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
    var is_ie4    = (is_ie && (is_major == 4) && (agt.indexOf("msie 4")!=-1) );
    var is_ie4up  = (is_ie && (is_major >= 4));	
	var is_opera  = (agt.indexOf("opera") != -1);
	var is_opera7 = (is_opera && is_major >= 7) || agt.indexOf("opera 7") != -1;

    if (agt.indexOf('konqueror') != -1) {
        var is_nav    = false;
        var is_nav6up = false;
        var is_gecko  = false;
        var is_ie     = true;
        var is_ie4    = true;
        var is_ie4up  = true;
    }