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/*
* Content-separated javascript tree widget
* Copyright (C) 2005 SilverStripe Limited
* Feel free to use this on your websites, but please leave this message in the fies
* http://www.silverstripe.com/blog
*/
/*
* Initialise all trees identified by <ul class="tree">
*/
function autoInit_trees() {
var candidates = document.getElementsByTagName('ul');
for(var i=0;i<candidates.length;i++) {
if(candidates[i].className && candidates[i].className.indexOf('tree') != -1) {
initTree(candidates[i]);
candidates[i].className = candidates[i].className.replace(/ ?unformatted ?/, ' ');
}
}
}
/*
* Initialise a tree node, converting all its LIs appropriately
*/
function initTree(el) {
var i,j;
var spanA, spanB, spanC;
var startingPoint, stoppingPoint, childUL;
// Find all LIs to process
for(i=0;i<el.childNodes.length;i++) {
if(el.childNodes[i].tagName && el.childNodes[i].tagName.toLowerCase() == 'li') {
var li = el.childNodes[i];
// Create our extra spans
spanA = document.createElement('span');
spanB = document.createElement('span');
spanC = document.createElement('span');
spanA.appendChild(spanB);
spanB.appendChild(spanC);
spanA.className = 'a ' + li.className.replace('closed','spanClosed');
spanA.onMouseOver = function() {};
spanB.className = 'b';
spanB.onclick = treeToggle;
spanC.className = 'c';
// Find the UL within the LI, if it exists
stoppingPoint = li.childNodes.length;
startingPoint = 0;
childUL = null;
for(j=0;j<li.childNodes.length;j++) {
if(li.childNodes[j].tagName && li.childNodes[j].tagName.toLowerCase() == 'div') {
startingPoint = j + 1;
continue;
}
if(li.childNodes[j].tagName && li.childNodes[j].tagName.toLowerCase() == 'ul') {
childUL = li.childNodes[j];
stoppingPoint = j;
break;
}
}
// Move all the nodes up until that point into spanC
for(j=startingPoint;j<stoppingPoint;j++) {
spanC.appendChild(li.childNodes[startingPoint]);
}
// Insert the outermost extra span into the tree
if(li.childNodes.length > startingPoint) li.insertBefore(spanA, li.childNodes[startingPoint]);
else li.appendChild(spanA);
// Process the children
if(childUL != null) {
if(initTree(childUL)) {
addClass(li, 'children', 'closed');
addClass(spanA, 'children', 'spanClosed');
}
}
}
}
if(li) {
// li and spanA will still be set to the last item
addClass(li, 'last', 'closed');
addClass(spanA, 'last', 'spanClosed');
return true;
} else {
return false;
}
}
/*
* +/- toggle the tree, where el is the <span class="b"> node
* force, will force it to "open" or "close"
*/
function treeToggle(el, force) {
el = this;
while(el != null && (!el.tagName || el.tagName.toLowerCase() != "li")) el = el.parentNode;
// Get UL within the LI
var childSet = findChildWithTag(el, 'ul');
var topSpan = findChildWithTag(el, 'span');
if( force != null ){
if( force == "open"){
treeOpen( topSpan, el );
}
else if( force == "close" ){
treeClose( topSpan, el );
}
}
else if( childSet != null) {
// Is open, close it
if(!el.className.match(/(^| )closed($| )/)) {
treeClose( topSpan, el );
// Is closed, open it
} else {
treeOpen( topSpan, el );
}
}
}
function treeOpen( a, b ){
removeClass(a,'spanClosed');
removeClass(b,'closed');
}
function treeClose( a, b ){
addClass(a,'spanClosed');
addClass(b,'closed');
}
/*
* Find the a child of el of type tag
*/
function findChildWithTag(el, tag) {
for(var i=0;i<el.childNodes.length;i++) {
if(el.childNodes[i].tagName != null && el.childNodes[i].tagName.toLowerCase() == tag) return el.childNodes[i];
}
return null;
}
/*
* Functions to add and remove class names
* Mac IE hates unnecessary spaces
*/
function addClass(el, cls, forceBefore) {
if(forceBefore != null && el.className.match(new RegExp('(^| )' + forceBefore))) {
el.className = el.className.replace(new RegExp("( |^)" + forceBefore), '$1' + cls + ' ' + forceBefore);
} else if(!el.className.match(new RegExp('(^| )' + cls + '($| )'))) {
el.className += ' ' + cls;
el.className = el.className.replace(/(^ +)|( +$)/g, '');
}
}
function removeClass(el, cls) {
var old = el.className;
var newCls = ' ' + el.className + ' ';
newCls = newCls.replace(new RegExp(' (' + cls + ' +)+','g'), ' ');
el.className = newCls.replace(/(^ +)|( +$)/g, '');
}
/*
* Handlers for automated loading
*/
_LOADERS = Array();
function callAllLoaders() {
var i, loaderFunc;
for(i=0;i<_LOADERS.length;i++) {
loaderFunc = _LOADERS[i];
if(loaderFunc != callAllLoaders) loaderFunc();
}
}
function appendLoader(loaderFunc) {
if(window.onload && window.onload != callAllLoaders)
_LOADERS[_LOADERS.length] = window.onload;
window.onload = callAllLoaders;
_LOADERS[_LOADERS.length] = loaderFunc;
}
appendLoader(autoInit_trees);
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