/*

  - Dropmenu Module for Joomla! ----------------------------------------------------------



  Filename:       mod_dropmenu/mod_dropmenu.js

  Version:        1.4

  Release Date:   10/17/06

  Developer:      David Hunt

  Copyright:      2006 Byrgius Technologies

  License:        GNU/GPL (http://www.gnu.org/copyleft/gpl.html)

  Source:         http://software.byrgius.com/



  - Dependants ---------------------------------------------------------------------------



  none



  ----------------------------------------------------------------------------------------

*/



/* -------------------------------- */

function wbDropMenu(){



  this.rowHeight  = 21;

  this.rowMargin  = 34;

  this.toggleInit = 0;

  this.dropTimer  = [];

  this.dropCache  = [];

  this.tumbleDry  = [];

  this.options = {

    'dropSpeed'       :250,

    'tumbleDry'       :true,

    'tumbleDrySpeed'  :10

    };



  // ===================================================================

  this.toggleDrop = function(t,o){

    if(t && o){

      if( !o.className.match(/_hov/) ){

        if( o.down('ul') ){

          Effect.Fade(o.down('ul'),{

            'beforeStart':function(e){

              var eL=e.element.up('li');

              e.element.setStyle({'display':'none'});

              eL.className=eL.className.replace(/(main|sub)/,'$1_hov');

            },'from':0,'to':1,'duration':.3});

        } else

          o.className=o.className.replace(/(main|sub)/,'$1_hov');

      }

      for(var i=0;i<this.dropCache.length;i++)

        if(o==this.dropCache[i]){

          this.dropCache.splice(i,1);

          clearTimeout(this.dropTimer.splice(i,1));

        }

    } else if(!t && o) {

      this.dropCache.push( o );

      this.dropTimer.push( setTimeout("document.wbdmenu.toggleDrop(0,null);",this.options.dropSpeed) );

    } else if(!t && this.dropCache.length) {

      var dropObj = this.dropCache.pop();

      var dropTim = this.dropTimer.pop();

      this.closeSet(dropObj);

    }

  }



  // ===================================================================

  this.closeSet = function(o,t){

    if(!o||!o.tagName){

      if(t&&this.tumbleDry.length){

        var o=$(this.tumbleDry.pop());

        if( o.down('ul') ){

          Effect.Fade(o.down('ul'),{

            'afterFinish':function(e){

              var eL=e.element.up('li');

              eL.className=eL.className.replace(/_hov/,'');

            },'from':1,'to':0,'duration':.3});

        } else

          o.className = o.className.replace(/_hov/,'');

        if(this.tumbleDry.length)

          setTimeout('document.wbdmenu.closeSet(null,true);',this.options.tumbleDrySpeed);

      }

      return;

    }

    if(this.options.tumbleDry){

      if( o.className.match(/_hov/) ){

        if(!this.tumbleDry.length)

          setTimeout('document.wbdmenu.closeSet(null,true);',(this.options.tumbleDrySpeed*this.getLevel(o)));

        this.tumbleDry.push(o);

      }

    } else

      o.className = o.className.replace(/_hov/,'');

    for(var i=0;i<o.childNodes.length;i++)

      if(o.childNodes[i].childNodes.length)

        this.closeSet(o.childNodes[i]);

  }



  // ===================================================================

  this.getLevel = function(o){

    if(o.parentNode&&o.parentNode.tagName)

      if(o.parentNode.tagName.toLowerCase()=='div')

        return 1;

      else if(o.parentNode.tagName.toLowerCase()=='ul')

        if(o.parentNode.className.match(/level/))

          return (o.parentNode.className.replace(/level/,'')*1)+1;

        else

          return 1;

      else

        return this.getLevel(o.parentNodes[i]);

    return 1;

  }



  // ===================================================================

  this.isChildOpen = function(o){

    for(var i=0;i<o.childNodes.length;i++)

      if(o.childNodes[i].tagName)

        if(o.childNodes[i].tagName.toLowerCase()=='li' && o.childNodes[i].className.match(/_hov/))

          return true;

        else if(o.childNodes[i].childNodes.length)

          if(this.isChildOpen(o.childNodes[i]))

            return true;

    return false;

  }



  // ===================================================================

  this.init = function(nodes){

    if(nodes){

      var childCount = 0;

      for(var i=0;i<nodes.length;i++){

        if( nodes[i].nodeName == 'A' )

          nodes[i].title = '';

        if( nodes[i].nodeName == 'LI' ){

          childCount++;

          if( nodes[i].childNodes[0].id != 'active_menu' ){

            nodes[i].wbdmenu = this;

            Event.observe(nodes[i],'mouseover',function(){this.wbdmenu.toggleDrop(1,this);});

            Event.observe(nodes[i],'mouseout',function(){this.wbdmenu.toggleDrop(0,this);});

          }

        }

        if( nodes[i].childNodes.length ){

          var myChildCount = this.init(nodes[i].childNodes);

          if( nodes[i].nodeName == 'UL' ){

            nodes[i].childCount = myChildCount;

            if( myChildCount && nodes[i].id.match(/_up/) ){

              var rowh = nodes[i].getAttribute('rowh'); if(!rowh)rowh = this.rowHeight; rowh = Math.floor(rowh);

              var rowm = nodes[i].getAttribute('rowh'); if(!rowm)rowm = this.rowMargin; rowm = Math.floor(rowm);

              nodes[i].style.marginTop = '-'+((myChildCount*rowh)+rowm)+'px';

            }

          }

        }

      }

      return childCount;

    } else {

      if( this.toggleInit )return null;

      var domElm = 0;

      do {

        var name = 'wbDropMenu'+domElm.toString();

        var menu = document.getElementById(name);

        if( menu )

          menu.childCount = this.init(menu.childNodes);

        domElm = domElm + 1;

      } while((menu !== null) || (typeof menu !== 'object'));

    }

  }



  // ===================================================================

  if(typeof document!='object')return null;

  if(typeof document.wbdmenu!=='undefined')return null;

  document.wbdmenu=this;



}

var wbDropMenuObj = new wbDropMenu();

Event.observe(window,'load',function(){document.wbdmenu.init();});