/*
  YUIDomCollapse by Christian Heilmann
  Version 1.0 / May 2007
  License: http://creativecommons.org/licenses/by/3.0/
  Homepage: http://onlinetools.org/tools/yuidomcollapse/
*/
// YUI Namespace
YAHOO.namespace('otorg');
YAHOO.otorg.DomCollapse =
{
 	init:function(){
    
	// shortcut for CSS properties
    var css = YAHOO.otorg.DomCollapse.css;

	if(typeof(css) !== 'undefined')
	{
		// get possible bookmark
		var bookmark = window.location.hash.replace('#','');
		// get all elements with the correct class
		var elms = YAHOO.util.Dom.getElementsByClassName(css.triggerClass);
		var elms2 = YAHOO.util.Dom.getElementsByClassName(css.triggerAllClass);
		// loop over all the elements
		for(var i=0,j=elms.length;i<j;i++)
		{
        	// if the trigger is not a link
        	if(elms[i].nodeName.toLowerCase()!=='a'){
        	  // get the next element
        	  var t = YAHOO.otorg.DomCollapse.getNext(elms[i]);
        	  if(t){
        	    // get the element's ID or create a new one
        	    var newID = t.id || YAHOO.util.Dom.generateId();
        	    t.setAttribute('id',newID);
        	    // create a new target and replace the element's
        	    // content with this new element
        	    var a = document.createElement('a');
        	    a.setAttribute('href','#'+newID);
        	    var c = elms[i].innerHTML;
        	    a.innerHTML = elms[i].innerHTML;
        	    elms[i].innerHTML = '';
        	    elms[i].appendChild(a);
        	    // if the ID is not the bookmark add the parent class 
        	    // to the trigger element and hide the element by 
        	    // adding the hide class
        	    if(newID !== bookmark){
        	      YAHOO.util.Dom.addClass(elms[i],css.parentClass);
        	      YAHOO.util.Dom.addClass(t,css.hideClass);
        	    // otherwise remove the hide class and add the 
        	    // open class to the trigger
        	    } else {
        	      YAHOO.util.Dom.addClass(elms[i],css.openClass);
        	      YAHOO.util.Dom.removeClass(t,css.hideClass);
        	    };
        	    // add a click handler to the link pointing to toggle()
        	    YAHOO.util.Event.on(a, 'click', YAHOO.otorg.DomCollapse.toggle);
        	  };
        	// if the trigger is a link
        }
		else
		{
			// get the ID from the href attribute
			var newID = elms[i].href.replace(/.*#/,'');
			// grab the connected element, or the next sibling in case
			// it doesn't exist
			var t = document.getElementById(newID) || YAHOO.otorg.DomCollapse.getNext(elms[i]);
			
			if(t !== null)
			{
				// re-set the href attribute to this element
				if(t.id !== newID)
				{
				  newID = t.id;
				  elms[i].setAttribute('href','#'+newID);
				};
				// if the ID is not the bookmark, hide the element
				// and add the parent class
				if(newID !== bookmark)
				{
					YAHOO.util.Dom.addClass(elms[i],css.parentClass);
					YAHOO.util.Dom.addClass(t,css.hideClass);
				// otherwise add the open class to the trigger
				}
				else
				{
					YAHOO.util.Dom.addClass(elms[i],css.openClass);
				};
				// add a click handler to the link pointing to toggle
				YAHOO.util.Event.on(elms[i], 'click', YAHOO.otorg.DomCollapse.toggle);
				YAHOO.util.Event.on(elms2[i], 'click', YAHOO.otorg.DomCollapse.toggleAll);
			};
        };
      };
      
    };
  },
  // tool method to get the next sibling that is not a text node
  getNext:function(o){
    var t = o.nextSibling;
    if(t){
      while(t.nodeType !== 1 && t.nextSibling){
        t = t.nextSibling;
      }
    }
    return t;  
  },

  // method to toggle the showing and hiding of the next element
  toggleAll:function(e)
  {
	var css 	= YAHOO.otorg.DomCollapse.css;
	var elms 	= YAHOO.util.Dom.getElementsByClassName(css.triggerClass);
	var parent	= YAHOO.util.Dom.hasClass(this,css.triggerAllClass) ? this : this.parentNode;
		
    if(parent.getAttribute('rel'))
    {
    	temp_var = parent.getAttribute('rel').split("::");
    }
    else
    {
    	var temp_var = new Array();
    	temp_var[0] = parent.innerHTML;
    	temp_var[1] = parent.innerHTML;
    }

	for(var i=0,j=elms.length;i<j;i++)
	{
		var newID = elms[i].href.replace(/.*#/,'');
		
		if( parent.innerHTML == temp_var[0] )
		{
			YAHOO.util.Dom.addClass(elms[i],css.openClass);
			YAHOO.util.Dom.removeClass(elms[i],css.parentClass);

			YAHOO.util.Dom.addClass(newID,css.openClass);
			YAHOO.util.Dom.removeClass(newID,css.hideClass);
			
			var button = temp_var[1];
		}
		else
		{
			YAHOO.util.Dom.addClass(elms[i],css.parentClass);
			YAHOO.util.Dom.removeClass(elms[i],css.openClass);

			YAHOO.util.Dom.addClass(newID,css.hideClass);
			YAHOO.util.Dom.removeClass(newID,css.openClass);
			
			var button = temp_var[0];
		}		
	}
	
	parent.innerHTML = button;

	YAHOO.util.Event.preventDefault(e);
  },

  // method to toggle the showing and hiding of the next element
  toggle:function(e)
  {
    // shortcut for CSS object
    var css = YAHOO.otorg.DomCollapse.css;
    // if the element has the trigger class it is a link, otherwise 
    // it is a generated link by init()
    var parent = YAHOO.util.Dom.hasClass(this,css.triggerClass) ? this : this.parentNode;
    // grab the ID the link points to from the href attribute and get the element
    var id = this.href.replace(/.*#/,'');
    var t = document.getElementById(id);

    if(t !== undefined){
      // if the element is hidden (has the hide class) remove the hide 
      // class and swap parent for open and vice versa
		if(YAHOO.util.Dom.hasClass(t,css.hideClass))
		{
        	YAHOO.util.Dom.removeClass(t,css.hideClass);
        	YAHOO.util.Dom.replaceClass(parent,css.parentClass,css.openClass);
      	} else {
        YAHOO.util.Dom.addClass(t,css.hideClass);
        YAHOO.util.Dom.replaceClass(parent,css.openClass,css.parentClass);
        // don't follow the link when you hide the element
        YAHOO.util.Event.preventDefault(e);
      };
    };
  }    
};
// If the DOM is ready, go for it.
YAHOO.util.Event.onDOMReady(YAHOO.otorg.DomCollapse.init);