/*
 * ul2finder
 * written by Christian Heilmann (http://icant.co.uk)
 * turns the nested list with the ID "finder" into a dynamic list
 * uses the CSS classes defined in the variables
 */
function ul2finder()
{
	// Define variables used and classes to be applied/removed
	var i,uls,als,finder;
	var parentClass='parent';
	var showClass='shown';
	var hideClass='hidden';
	var openClass='open';
  window.finderOpened = new Object();

	// check if our finder list exists, if not, stop all activities
	finder=document.getElementById('finder');
	if(!finder){return;}

	// add the class domenabled to the body
	cssjs('add',document.body,'domenabled')

	// loop through all lists inside finder, position and hide them 
	// by applying the class hidden
	uls=document.getElementById('finder').getElementsByTagName('ul');
	for(i=0;i<uls.length;i++)
	{
		cssjs('add',uls[i],hideClass);
	}	

	// loop through all links of inside finder
	lis=document.getElementById('finder').getElementsByTagName('li');
	for(i=0;i<lis.length;i++)
	{
		// if the li containing the link has no nested list, skip this one
		if(!lis[i].getElementsByTagName('ul')[0])
		{
			continue;
		}
		var newa=document.createElement('a');
		newa.href='#';
		newa.appendChild(document.createTextNode(lis[i].firstChild.nodeValue));
		lis[i].replaceChild(newa,lis[i].firstChild);
		// otherwise apply the parent class
		cssjs('add',newa,parentClass);
		
    // setup the link
    ref = lis[i].getElementsByTagName('a')[0];
    ref.id = 'finder[' + i + ']';
    window.finderOpened[ref.id] = false;

		// if the user clicks on the link
		ref.onclick=function()
		{
      // loop through all lists inside finder
			for(var i=0;i<uls.length;i++)
			{
				// avoid the list connected to this link
				var found=false;
				for(j=0;j<uls[i].getElementsByTagName('ul').length;j++)
				{
					if(uls[i].getElementsByTagName('ul')[j] == 		
						this.parentNode.getElementsByTagName('ul')[0])
					{
						found=true;
						break;
					}
				}

				// and hide all others
				if(!found)
				{
          cssjs('add',uls[i],hideClass)
					cssjs('remove',uls[i],showClass)
					cssjs('remove',uls[i].parentNode.getElementsByTagName('a')[0],openClass)
          cssjs('add',uls[i].parentNode.getElementsByTagName('a')[0],parentClass)
				}
			}	

      if (window.finderOpened[this.id] == false) {
        window.finderOpened[this.id] = true;
        // change the current link from parent to open 	
        // and show the current nested list 
        cssjs('remove',this,parentClass);
        cssjs('add',this,openClass);
        cssjs('add',this.parentNode.getElementsByTagName('ul')[0],showClass);

        // unset window.finderNode for all other nodes that aren't children
        children = this.parentNode.childNodes;
        refs = document.getElementById('finder').getElementsByTagName('a');
        for (var i=0;i<refs.length;i++) {
          found = false;
          if (refs[i] != this) {
            // search at children
            for(var j=0;j<children.lenght;j++) {
              if (refs[i] == children[j]) {
                found = true;
                break;
              }
            }
            // TODO: search at parent
            if (!found) {
              window.finderOpened[refs[i].id] = false;
              refs[i].innerHTML = window.finderOpened[refs[i].id];
            }
          }
        }
      } else {
        window.finderOpened[this.id] = false;
        // change the current link from open to parent
        // and hide the current nested list 
        cssjs('add',this,parentClass);
        cssjs('remove',this,openClass);
        children = this.parentNode.getElementsByTagName('ul');
        // TODO: check and fix
        for(var j=0;j<children.lenght;j++) {
          cssjs('remove',children[j],showClass);
          children[j].innerHTML = window.finderOpened[refs[i].id];
        }
      }

      this.innerHTML = window.finderOpened[this.id];
			// don't follow the real HREF of the link
			return false;
		}
	}	
	/*
	 * cssjs
	 * written by Christian Heilmann (http://icant.co.uk)
	 * eases the dynamic application of CSS classes via DOM
	 * parameters: action a, object o and class names c1 and c2 (c2 optional)
	 * actions: swap exchanges c1 and c2 in object o
	 *			add adds class c1 to object o
	 *			remove removes class c1 from object o
	 *			check tests if class c1 is applied to object o
	 * example:	cssjs('swap',document.getElementById('foo'),'bar','baz');
	 */
	function cssjs(a,o,c1,c2)
	{
		switch (a){
			case 'swap':
				o.className=!cssjs('check',o,c1)?o.className.replace(c2,c1):o.className.replace(c1,c2);
			break;
			case 'add':
				if(!cssjs('check',o,c1)){o.className+=o.className?' '+c1:c1;}
			break;
			case 'remove':
				var rep=o.className.match(' '+c1)?' '+c1:c1;
				o.className=o.className.replace(rep,'');
			break;
			case 'check':
				return new RegExp('\\b'+c1+'\\b').test(o.className)
			break;
		}
	}
}

// Check if the browser supports DOM, and start the script if it does.
if(document.getElementById && document.createTextNode)
{
	window.onload=ul2finder;
}