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/**
* Copyright (c)2005-2009 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 do not claim to have written it yourself!
* Donations always accepted: https://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;
}
}
// 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) {
item.className=cName;
return true;
}
}
}
if (subLists && itemId==null) {
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 cannot 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) {
processList(ul);
}
}
}
}
function treeNodeOnclick() {
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'; //
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 = treeNodeOnclick;
}
else {
// No sublists, so it's just a bullet node
item.className = nodeBulletClass;
s.onclick = retFalse;
}
s.appendChild(document.createTextNode(t));
item.insertBefore(s,item.firstChild);
}
}
}
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