/*
* Treeview pre-1.4.1 - jQuery plugin to hide and show branches of a tree
*
* http://bassistance.de/jquery-plugins/jquery-plugin-treeview/
* http://docs.jquery.com/Plugins/Treeview
*
* Copyright (c) 2007 Jörn Zaefferer
*
* Dual licensed under the MIT and GPL licenses:
*   http://www.opensource.org/licenses/mit-license.php
*   http://www.gnu.org/licenses/gpl.html
*
* Revision: $Id$
*
*/

;(function($) {

   $.extend($.fn, {
       swapClass: function(c1, c2) {
           var c1Elements = this.filter('.' + c1);
           this.filter('.' + c2).removeClass(c2).addClass(c1);
           c1Elements.removeClass(c1).addClass(c2);
           return this;
       },
       replaceClass: function(c1, c2) {
           return this.filter('.' + c1).removeClass(c1).addClass(c2).end();
       },
       hoverClass: function(className) {
           className = className || "hover";
           return this.hover(function() {
               $(this).addClass(className);
           }, function() {
               $(this).removeClass(className);
           });
       },
       heightToggle: function(animated, callback) {
           animated ?
               this.animate({ height: "toggle" }, animated, callback) :
               this.each(function(){
                   jQuery(this)[ jQuery(this).is(":hidden") ? "show" : "hide" ]();
                   if(callback)
                       callback.apply(this, arguments);
               });
       },
       heightHide: function(animated, callback) {
           if (animated) {
               this.animate({ height: "hide" }, animated, callback);
           } else {
               this.hide();
               if (callback)
                   this.each(callback);               
           }
       },
       prepareBranches: function(settings) {
           if (!settings.prerendered) {
               // mark last tree items
               this.filter(":last-child:not(ul)").addClass(CLASSES.last);
               // collapse whole tree, or only those marked as closed, anyway except those marked as open
               this.filter((settings.collapsed ? "" : "." + CLASSES.closed) + ":not(." + CLASSES.open + ")").find(">ul").hide();
           }
           // return all items with sublists
           return this.filter(":has(>ul)");
       },
       applyClasses: function(settings, toggler) {
           this.filter(":has(>ul):not(:has(>a))").find(">span").unbind("click.treeview").bind("click.treeview", function(event) {
               // don't handle click events on children, eg. checkboxes
               if ( this == event.target )
                   toggler.apply($(this).next());
           }).add( $("a", this) ).hoverClass();
          
           if (!settings.prerendered) {
               // handle closed ones first
               this.filter(":has(>ul:hidden)")
                       .addClass(CLASSES.expandable)
                       .replaceClass(CLASSES.last, CLASSES.lastExpandable);
                      
               // handle open ones
               this.not(":has(>ul:hidden)")
                       .addClass(CLASSES.collapsable)
                       .replaceClass(CLASSES.last, CLASSES.lastCollapsable);
                      
               // create hitarea if not present
               var hitarea = this.find("div." + CLASSES.hitarea);
               if (!hitarea.length)
                   hitarea = this.prepend("<div class=\"" + CLASSES.hitarea + "\"/>").find("div." + CLASSES.hitarea);
               hitarea.removeClass().addClass(CLASSES.hitarea).each(function() {
                   var classes = "";
                   $.each($(this).parent().attr("class").split(" "), function() {
                       classes += this + "-hitarea ";
                   });
                   $(this).addClass( classes );
               })
           }
          
           // apply event to hitarea
           this.find("div." + CLASSES.hitarea).click( toggler );
       },
       treeview: function(settings) {
          
           settings = $.extend({
               cookieId: "treeview"
           }, settings);
          
           if ( settings.toggle ) {
               var callback = settings.toggle;
               settings.toggle = function() {
                   return callback.apply($(this).parent()[0], arguments);
               };
           }
      
           // factory for treecontroller
           function treeController(tree, control) {
               // factory for click handlers
               function handler(filter) {
                   return function() {
                       // reuse toggle event handler, applying the elements to toggle
                       // start searching for all hitareas
                       toggler.apply( $("div." + CLASSES.hitarea, tree).filter(function() {
                           // for plain toggle, no filter is provided, otherwise we need to check the parent element
                           return filter ? $(this).parent("." + filter).length : true;
                       }) );
                       return false;
                   };
               }
               // click on first element to collapse tree
               $("a:eq(0)", control).click( handler(CLASSES.collapsable) );
               // click on second to expand tree
               $("a:eq(1)", control).click( handler(CLASSES.expandable) );
               // click on third to toggle tree
               $("a:eq(2)", control).click( handler() );
           }
      
           // handle toggle event
           function toggler() {
               $(this)
                   .parent()
                   // swap classes for hitarea
                   .find(">.hitarea")
                       .swapClass( CLASSES.collapsableHitarea, CLASSES.expandableHitarea )
                       .swapClass( CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea )
                   .end()
                   // swap classes for parent li
                   .swapClass( CLASSES.collapsable, CLASSES.expandable )
                   .swapClass( CLASSES.lastCollapsable, CLASSES.lastExpandable )
                   // find child lists
                   .find( ">ul" )
                   // toggle them
                   .heightToggle( settings.animated, settings.toggle );
               if ( settings.unique ) {
                   $(this).parent()
                       .siblings()
                       // swap classes for hitarea
                       .find(">.hitarea")
                           .replaceClass( CLASSES.collapsableHitarea, CLASSES.expandableHitarea )
                           .replaceClass( CLASSES.lastCollapsableHitarea, CLASSES.lastExpandableHitarea )
                       .end()
                       .replaceClass( CLASSES.collapsable, CLASSES.expandable )
                       .replaceClass( CLASSES.lastCollapsable, CLASSES.lastExpandable )
                       .find( ">ul" )
                       .heightHide( settings.animated, settings.toggle );
               }
		// start added code
		$$ = jQuery(this).parent().find(">ul");
		if($$.find(">li").length == 0)
		//do ajax call to fill it
		jQuery.get( settings.postback,
			{ expand:jQuery(this).parent()[0].id },
			function(msg){ 
				$$.html(msg);
				$$.treeview({
					persist : "location",
					collapsed : true,
					unique : true,
					postback : settings.postback,
					stack : settings.stack
				});
			}
		);

		if(settings.stack && settings.stack[0] == $(this).parent()[0].id)
		{
			settings.stack.shift();
			setTimeout('jQuery("#" + ' + settings.stack[0]+ ' + " .hitarea").click()', 1000);
		}
		// end added code
           }
           this.data("toggler", toggler);
          
           function serialize() {
               function binary(arg) {
                   return arg ? 1 : 0;
               }
               var data = [];
               branches.each(function(i, e) {
                   data[i] = $(e).is(":has(>ul:visible)") ? 1 : 0;
               });
               $.cookie(settings.cookieId, data.join(""), settings.cookieOptions );
           }
          
           function deserialize() {
               var stored = $.cookie(settings.cookieId);
               if ( stored ) {
                   var data = stored.split("");
                   branches.each(function(i, e) {
                       $(e).find(">ul")[ parseInt(data[i]) ? "show" : "hide" ]();
                   });
               }
           }
          
           // add treeview class to activate styles
           this.addClass("treeview");
          
           // prepare branches and find all tree items with child lists
           var branches = this.find("li").prepareBranches(settings);
          
           switch(settings.persist) {
           case "cookie":
               var toggleCallback = settings.toggle;
               settings.toggle = function() {
                   serialize();
                   if (toggleCallback) {
                       toggleCallback.apply(this, arguments);
                   }
               };
               deserialize();
               break;
           case "location":
               var current = this.find("a").filter(function() { return this.href.toLowerCase() == location.href.toLowerCase(); });
               if ( current.length ) {
                   current.addClass("selected").parents("ul, li").add( current.next() ).show();
               }
               break;
           }
          
           branches.applyClasses(settings, toggler);
              
           // if control option is set, create the treecontroller and show it
           if ( settings.control ) {
               treeController(this, settings.control);
               $(settings.control).show();
           }
          
           return this;
       }
   });
  
   // classes used by the plugin
   // need to be styled via external stylesheet, see first example
   $.treeview = {};
   var CLASSES = ($.treeview.classes = {
       open: "open",
       closed: "closed",
       expandable: "expandable",
       expandableHitarea: "expandable-hitarea",
       lastExpandableHitarea: "lastExpandable-hitarea",
       collapsable: "collapsable",
       collapsableHitarea: "collapsable-hitarea",
       lastCollapsableHitarea: "lastCollapsable-hitarea",
       lastCollapsable: "lastCollapsable",
       lastExpandable: "lastExpandable",
       last: "last",
       hitarea: "hitarea"
   });
  
   // provide backwards compability
   $.fn.Treeview = $.fn.treeview;
  
})(jQuery);