// http://www.mattkruse.com/
// correction ActenGo (opera fix + style)
function initUlTree() {
	var currantStylesheetDir = 'normal';
	if (document.getElementById("habillage"))
		currantStylesheetDir = document.getElementById("habillage").options[document.getElementById("habillage").selectedIndex].value;
	
	// ccs appliqué uniquement si js activé
	var headID  = document.getElementsByTagName("head")[0];         
	var cssNode = document.createElement('link');	
	cssNode.type  = 'text/css';
	cssNode.rel   = 'stylesheet';
	cssNode.href  = sRacineCharte + 'style/' + currantStylesheetDir + '/ultree.css';
	cssNode.media = 'screen';	
	headID.appendChild(cssNode);
	
	convertTrees();
}
onDomReady(initUlTree);

// initialise des vrariables en Globale si non initialisées
function setDefault(name,val) {
	if (typeof(window[name])=="undefined" || window[name]==null) window[name]=val;
}

// tout développer (élément avec ID)
function expandTree(treeId) {
	var ul = document.getElementById(treeId);
	if (ul == null) return false;
	return expandCollapseList(ul,nodeOpenClass);
}

// tout fermer (élément avec ID)
function collapseTree(treeId) {
	var ul = document.getElementById(treeId);
	if (ul == null) return false;
	return expandCollapseList(ul,nodeClosedClass);
}

// Expands enough nodes to expose an LI with a given ID
function expandToItem(treeId,itemId) {
	var ul = document.getElementById(treeId);
	if (ul == null) return false;
	var ret = expandCollapseList(ul,nodeOpenClass,itemId);
	if (ret) {
		var o = document.getElementById(itemId);
		if (o.scrollIntoView) o.scrollIntoView(false);
	}
	return ret;
}

// Performs 3 functions:
// a) Expand all nodes
// b) Collapse all nodes
// c) Expand all nodes to reach a certain ID
function expandCollapseList(ul,cName,itemId) {
	if (!ul.childNodes || ul.childNodes.length==0) return false;
	// Iterate LIs
	for (var itemi=0;itemi<ul.childNodes.length;itemi++) {
		var item = ul.childNodes[itemi];
		if (itemId!=null && item.id==itemId) return true;
		if (item.nodeName == "LI") {
			// Iterate things in this LI
			var subLists = false;
			for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
				var sitem = item.childNodes[sitemi];
				if (sitem.nodeName=="UL") {
					subLists = true;
					var ret = expandCollapseList(sitem,cName,itemId);
					if (itemId!=null && ret) {
						item.className=cName;
						return true;
					}
				}
			}
			if (subLists && itemId==null) item.className = cName;
		}
	}
	return true;
}

// Search the document for UL elements with the correct CLASS name, then process them
function convertTrees() {
	if (typeof(treeCss_firstload) == "undefined") {	// opera fix (évite N reboucle)
		setDefault("treeClass","ultree");
		setDefault("nodeClosedClass","liClosed");
		setDefault("nodeOpenClass","liOpen");
		setDefault("nodeBulletClass","liBullet");
		setDefault("nodeLinkClass","bullet");
		setDefault("preProcessTrees",true);
		setDefault("treeCss_firstload",true);
		if (preProcessTrees) {
			if (!document.createElement) return; // Without createElement, we can't do anything
			uls = document.getElementsByTagName("ul");
			for (var uli=0;uli<uls.length;uli++) {
				var ul=uls[uli];
				if (ul.nodeName=="UL" && ul.className==treeClass) processList(ul);
			}
		}
	}
}

// Process a UL tag and all its children, to convert to a tree
function processList(ul) {
	if (!ul.childNodes || ul.childNodes.length==0) { return; }
	// Iterate LIs
	for (var itemi=0;itemi<ul.childNodes.length;itemi++) {
		var item = ul.childNodes[itemi];
		if (item.nodeName == "LI") {
			// Iterate things in this LI
			var subLists = false;
			for (var sitemi=0;sitemi<item.childNodes.length;sitemi++) {
				var sitem = item.childNodes[sitemi];
				if (sitem.nodeName=="UL") {
					subLists = true;
					processList(sitem);
				}
			}
			var s= document.createElement("SPAN");
			var t= '\u00A0'; // &nbsp;
			s.className = nodeLinkClass;
			if (subLists) {
				// This LI has UL's in it, so it's a +/- node
				if (item.className==null || item.className=="")
					item.className = nodeClosedClass;

				// If it's just text, make the text work as the link also
				if (item.firstChild.nodeName=="#text") {
					t = t+item.firstChild.nodeValue;
					item.removeChild(item.firstChild);
				}
				s.onclick = function () {
					this.parentNode.className = (this.parentNode.className==nodeOpenClass) ? nodeClosedClass : nodeOpenClass;
					return false;
				}
			}
			else {
				// No sublists, so it's just a bullet node
				item.className = nodeBulletClass;
				s.onclick = function () { return false; }
			}
			s.appendChild(document.createTextNode(t));
			item.insertBefore(s,item.firstChild);
		}
	}
}