/**
 * Copyright (c)2005-2007 Matt Kruse (javascripttoolbox.com)
 * 
 * Dual licensed under the MIT and GPL licenses. 
 * This basically means you can use this code however you want for
 * free, but don't claim to have written it yourself!
 * Donations always accepted: http://www.JavascriptToolbox.com/donate/
 * 
 * Please do not link to the .js files on javascripttoolbox.com from
 * your site. Copy the files locally to your server instead.
 * 
 */
/*
This code is inspired by and extended from Stuart Langridge's aqlist code:
		http://www.kryogenix.org/code/browser/aqlists/
		Stuart Langridge, November 2002
		sil@kryogenix.org
		Inspired by Aaron's labels.js (http://youngpup.net/demos/labels/) 
		and Dave Lindquist's menuDropDown.js (http://www.gazingus.org/dhtml/?id=109)
*/

// Automatically attach a listener to the window onload, to convert the trees
addEvent(window,"load",convertTrees);

// Utility function to add an event listener
function addEvent(o,e,f){
	if (o.addEventListener){ o.addEventListener(e,f,false); return true; }
	else if (o.attachEvent){ return o.attachEvent("on"+e,f); }
	else { return false; }
}

// utility function to set a global variable if it is not already set
function setDefault(name,val) {
	if (typeof(window[name])=="undefined" || window[name]==null) {
		window[name]=val;
	}
}

// Added by Edward Dale <scompt@scompt.com>
function expandCat() {
    var allLis=document.getElementsByTagName('li'); 
    var changed = false;
    //Cycle through the tags using a for loop 
    for (i=0; i<allLis.length; i++) { 
        if( hasClass( allLis[i], 'current-cat' ) ) {
            for (var j=0; j < allLis[i].childNodes.length; j++) {
                if( allLis[i].childNodes[j].nodeName == 'UL' ) {
                    for (var k=0; k < allLis[i].childNodes[j].childNodes.length; k++) {
                        if( allLis[i].childNodes[j].childNodes[k].nodeName == 'LI' ) {
                            allLis[i].childNodes[j].childNodes[k].id = 'blahblahblah';
                            expandToItem('mktree_cats', 'blahblahblah');
                            allLis[i].childNodes[j].childNodes[k].id = '';
                            changed = true;
                        }
                    };
                }
            };
            allLis[i].id = 'blahblahblah';
            expandToItem('mktree_cats', 'blahblahblah');
            allLis[i].id = '';
            changed = true;
        }
    } 
}

// Full expands a tree with a given ID
function expandTree(treeId) {
	var ul = document.getElementById(treeId);
	if (ul == null) { return false; }
	expandCollapseList(ul,nodeOpenClass);
}

// Fully collapses a tree with a given ID
function collapseTree(treeId) {
	var ul = document.getElementById(treeId);
	if (ul == null) { return false; }
	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);
		}
	}
}

// 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) {
					    setNodeClass( item, cName );
						// item.className=cName;
						return true;
					}
				}
			}
			if (subLists && itemId==null) {
                setNodeClass( item, cName );
                // item.className = cName;
			}
		}
	}
}

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

function treeNodeOnclick() {
    if( hasClass( this.parentNode, nodeOpenClass ) ) {
        removeClass( this.parentNode, nodeOpenClass );
        addClass( this.parentNode, nodeClosedClass );
    } else {
        removeClass( this.parentNode, nodeClosedClass );
        addClass( this.parentNode, nodeOpenClass );
    }
    // this.parentNode.className = (this.parentNode.className==nodeOpenClass) ? nodeClosedClass : nodeOpenClass;
	return false;
}
function retFalse() {
	return false;
}
// 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
	var childNodesLength = ul.childNodes.length;
	for (var itemi=0;itemi<childNodesLength;itemi++) {
		var item = ul.childNodes[itemi];
		if (item.nodeName == "LI") {
			// Iterate things in this LI
			var subLists = false;
			var itemChildNodesLength = item.childNodes.length;
			for (var sitemi=0;sitemi<itemChildNodesLength;sitemi++) {
				var sitem = item.childNodes[sitemi];
				if (sitem.nodeName=="UL") {
					subLists = true;
					processList(sitem);
				}
			}
			var s= document.createElement("SPAN");
			var t= '\u00A0'; // &nbsp;
			addClass( s, nodeLinkClass );
            // s.className = nodeLinkClass;
			if (subLists) {
				// This LI has UL's in it, so it's a +/- node
				if( !hasClass( item, nodeClosedClass ) && !hasClass(item, nodeOpenClass) && !hasClass(item, nodeBulletClass) && !hasClass(item, nodeLinkClass)) {
				    addClass( item, nodeClosedClass );
				}
                // 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 = treeNodeOnclick;
			}
			else {
				// No sublists, so it's just a bullet node
				addClass( item, nodeBulletClass );
                // item.className = nodeBulletClass;
				s.onclick = retFalse;
			}
			s.appendChild(document.createTextNode(t));
			item.insertBefore(s,item.firstChild);
		}
	}
}


function setNodeClass(ele,cls) {
	removeClass(ele, nodeClosedClass);
	removeClass(ele, nodeOpenClass);
	removeClass(ele, nodeBulletClass);
	removeClass(ele, nodeLinkClass);
    addClass(ele, cls);
}

function hasClass(ele,cls) {
	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
}
function addClass(ele,cls) {
	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
}
function removeClass(ele,cls) {
	if (hasClass(ele,cls)) {
		var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
		ele.className=ele.className.replace(reg,' ');
	}
}