xtree.js

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var webFXTreeConfig = {
	rootIcon        : 'images/foldericon.png',
	openRootIcon    : 'images/openfoldericon.png',
	folderIcon      : 'images/foldericon.png',
	openFolderIcon  : 'images/openfoldericon.png',
	fileIcon        : 'images/file.png',
	iIcon           : 'images/I.png',
	lIcon           : 'images/L.png',
	lMinusIcon      : 'images/Lminus.png',
	lPlusIcon       : 'images/Lplus.png',
	tIcon           : 'images/T.png',
	tMinusIcon      : 'images/Tminus.png',
	tPlusIcon       : 'images/Tplus.png',
	blankIcon       : 'images/blank.png',
	defaultText     : 'Tree Item',
	defaultAction   : 'javascript:void(0);',
	defaultBehavior : 'classic',
	usePersistence	: true
};
var webFXTreeHandler = {
	idCounter : 0,
	idPrefix  : "webfx-tree-object-",
	all       : {},
	behavior  : null,
	selected  : null,
	onSelect  : null, /* should be part of tree, not handler */
	getId     : function() { return this.idPrefix + this.idCounter++; },
	toggle    : function (oItem) { this.all[oItem.id.replace('-plus','')].toggle(); },
	select    : function (oItem) { this.all[oItem.id.replace('-icon','')].select(); },
	focus     : function (oItem) { this.all[oItem.id.replace('-anchor','')].focus(); },
	blur      : function (oItem) { this.all[oItem.id.replace('-anchor','')].blur(); },
	keydown   : function (oItem, e) { return this.all[oItem.id].keydown(e.keyCode); },
	cookies   : new WebFXCookie(),
	insertHTMLBeforeEnd	:	function (oElement, sHTML) {
		if (oElement.insertAdjacentHTML != null) {
			oElement.insertAdjacentHTML("BeforeEnd", sHTML)
			return;
		}
		var df;	// DocumentFragment
		var r = oElement.ownerDocument.createRange();
		r.selectNodeContents(oElement);
		r.collapse(false);
		df = r.createContextualFragment(sHTML);
		oElement.appendChild(df);
	}
};
function WebFXCookie() {
	if (document.cookie.length) { this.cookies = ' ' + document.cookie; }
}

WebFXCookie.prototype.setCookie = function (key, value) {
	document.cookie = key + "=" + escape(value);
}

WebFXCookie.prototype.getCookie = function (key) {
	if (this.cookies) {
		var start = this.cookies.indexOf(' ' + key + '=');
		if (start == -1) { return null; }
		var end = this.cookies.indexOf(";", start);
		if (end == -1) { end = this.cookies.length; }
		end -= start;
		var cookie = this.cookies.substr(start,end);
		return unescape(cookie.substr(cookie.indexOf('=') + 1, cookie.length - cookie.indexOf('=') + 1));
	}
	else { return null; }
}
function WebFXTreeAbstractNode(sText, sAction) {
	this.childNodes  = [];
	this.id     = webFXTreeHandler.getId();
	this.text   = sText || webFXTreeConfig.defaultText;
	this.action = sAction || webFXTreeConfig.defaultAction;
	this._last  = false;
	webFXTreeHandler.all[this.id] = this;
}
WebFXTreeAbstractNode.prototype.add = function (node, bNoIdent) {
	node.parentNode = this;
	this.childNodes[this.childNodes.length] = node;
	var root = this;
	if (this.childNodes.length >= 2) {
		this.childNodes[this.childNodes.length - 2]._last = false;
	}
	while (root.parentNode) { root = root.parentNode; }
	if (root.rendered) {
		if (this.childNodes.length >= 2) {
			document.getElementById(this.childNodes[this.childNodes.length - 2].id + '-plus').src = ((this.childNodes[this.childNodes.length -2].folder)?((this.childNodes[this.childNodes.length -2].open)?webFXTreeConfig.tMinusIcon:webFXTreeConfig.tPlusIcon):webFXTreeConfig.tIcon);
			this.childNodes[this.childNodes.length - 2].plusIcon = webFXTreeConfig.tPlusIcon;
			this.childNodes[this.childNodes.length - 2].minusIcon = webFXTreeConfig.tMinusIcon;
			this.childNodes[this.childNodes.length - 2]._last = false;
		}
		this._last = true;
		var foo = this;
		while (foo.parentNode) {
			for (var i = 0; i < foo.parentNode.childNodes.length; i++) {
				if (foo.id == foo.parentNode.childNodes[i].id) { break; }
			}
			if (i == foo.parentNode.childNodes.length - 1) { foo.parentNode._last = true; }
			else { foo.parentNode._last = false; }
			foo = foo.parentNode;
		}
		webFXTreeHandler.insertHTMLBeforeEnd(document.getElementById(this.id + '-cont'), node.toString());
		if ((!this.folder) && (!this.openIcon)) {
			this.icon = webFXTreeConfig.folderIcon;
			this.openIcon = webFXTreeConfig.openFolderIcon;
		}
		if (!this.folder) { this.folder = true; this.collapse(true); }
		if (!bNoIdent) { this.indent(); }
	}
	return node;
}
WebFXTreeAbstractNode.prototype.toggle = function() {
	if (this.folder) {
		if (this.open) { this.collapse(); }
		else { this.expand(); }
 }
}
WebFXTreeAbstractNode.prototype.select = function() {
	document.getElementById(this.id + '-anchor').focus();
}
WebFXTreeAbstractNode.prototype.deSelect = function() {
	document.getElementById(this.id + '-anchor').className = '';
	webFXTreeHandler.selected = null;
}
WebFXTreeAbstractNode.prototype.focus = function() {
	if ((webFXTreeHandler.selected) && (webFXTreeHandler.selected != this)) { webFXTreeHandler.selected.deSelect(); }
	webFXTreeHandler.selected = this;
	if ((this.openIcon) && (webFXTreeHandler.behavior != 'classic')) { document.getElementById(this.id + '-icon').src = this.openIcon; }
	document.getElementById(this.id + '-anchor').className = 'selected';
	document.getElementById(this.id + '-anchor').focus();
	if (webFXTreeHandler.onSelect) { webFXTreeHandler.onSelect(this); }
}
WebFXTreeAbstractNode.prototype.blur = function() {
	if ((this.openIcon) && (webFXTreeHandler.behavior != 'classic')) { document.getElementById(this.id + '-icon').src = this.icon; }
	document.getElementById(this.id + '-anchor').className = 'selected-inactive';
}
WebFXTreeAbstractNode.prototype.doExpand = function() {
	if (webFXTreeHandler.behavior == 'classic') { document.getElementById(this.id + '-icon').src = this.openIcon; }
	if (this.childNodes.length) {  document.getElementById(this.id + '-cont').style.display = 'block'; }
	this.open = true;
	if (webFXTreeConfig.usePersistence)
		webFXTreeHandler.cookies.setCookie(this.id.substr(18,this.id.length - 18), '1');
}
WebFXTreeAbstractNode.prototype.doCollapse = function() {
	if (webFXTreeHandler.behavior == 'classic') { document.getElementById(this.id + '-icon').src = this.icon; }
	if (this.childNodes.length) { document.getElementById(this.id + '-cont').style.display = 'none'; }
	this.open = false;
	if (webFXTreeConfig.usePersistence)
		webFXTreeHandler.cookies.setCookie(this.id.substr(18,this.id.length - 18), '0');
}
WebFXTreeAbstractNode.prototype.expandAll = function() {
	this.expandChildren();
	if ((this.folder) && (!this.open)) { this.expand(); }
}
WebFXTreeAbstractNode.prototype.expandChildren = function() {
	for (var i = 0; i < this.childNodes.length; i++) {
		this.childNodes[i].expandAll();
} }
WebFXTreeAbstractNode.prototype.collapseAll = function() {
	this.collapseChildren();
	if ((this.folder) && (this.open)) { this.collapse(true); }
}
WebFXTreeAbstractNode.prototype.collapseChildren = function() {
	for (var i = 0; i < this.childNodes.length; i++) {
		this.childNodes[i].collapseAll();
} }
WebFXTreeAbstractNode.prototype.indent = function(lvl, del, last, level, nodesLeft) {
	/*
	 * Since we only want to modify items one level below ourself,
	 * and since the rightmost indentation position is occupied by
	 * the plus icon we set this to -2
	 */
	if (lvl == null) { lvl = -2; }
	var state = 0;
	for (var i = this.childNodes.length - 1; i >= 0 ; i--) {
		state = this.childNodes[i].indent(lvl + 1, del, last, level);
		if (state) { return; }
	}
	if (del) {
		if ((level >= this._level) && (document.getElementById(this.id + '-plus'))) {
			if (this.folder) {
				document.getElementById(this.id + '-plus').src = (this.open)?webFXTreeConfig.lMinusIcon:webFXTreeConfig.lPlusIcon;
				this.plusIcon = webFXTreeConfig.lPlusIcon;
				this.minusIcon = webFXTreeConfig.lMinusIcon;
			}
			else if (nodesLeft) { document.getElementById(this.id + '-plus').src = webFXTreeConfig.lIcon; }
			return 1;
	}	}
	var foo = document.getElementById(this.id + '-indent-' + lvl);
	if (foo) {
		if ((foo._last) || ((del) && (last))) { foo.src =  webFXTreeConfig.blankIcon; }
		else { foo.src =  webFXTreeConfig.iIcon; }
	}
	return 0;
}

function WebFXTree(sText, sAction, sBehavior, sIcon, sOpenIcon) {
	this.base = WebFXTreeAbstractNode;
	this.base(sText, sAction);
	this.icon      = sIcon || webFXTreeConfig.rootIcon;
	this.openIcon  = sOpenIcon || webFXTreeConfig.openRootIcon;
	/* Defaults to open */
	if (webFXTreeConfig.usePersistence)
		this.open  = (webFXTreeHandler.cookies.getCookie(this.id.substr(18,this.id.length - 18)) == '0')?false:true;
	else
		this.open  = true;
	this.folder    = true;
	this.rendered  = false;
	this.onSelect  = null;
	if (!webFXTreeHandler.behavior) {  webFXTreeHandler.behavior = sBehavior || webFXTreeConfig.defaultBehavior; }
}
WebFXTree.prototype = new WebFXTreeAbstractNode;
WebFXTree.prototype.setBehavior = function (sBehavior) {