/*
 * Droppy 0.1.2
 * (c) 2008 Jason Frame (jason@onehackoranother.com)
 */
$.fn.droppy = function(options) {
    
  options = $.extend({speed: 250, noSlideUp: 0}, options || {});
  
  this.each(function() {
    
    //var root = this, zIndex = 1000;
    var root = this, zIndex = 0;
    
    function getSubnav(ele) {
      if (ele.nodeName.toLowerCase() == 'li') {
        var subnav = $('> ul', ele);
        return subnav.length ? subnav[0] : null;
      } else {
        return ele;
      }
    }
    
    function getActuator(ele) {
      if (ele.nodeName.toLowerCase() == 'ul') {
        return $(ele).parents('li')[0];
      } else {
        return ele;
      }
    }
    
    function hide() {
      var subnav = getSubnav(this);
      if (!subnav) return;
      $.data(subnav, 'cancelHide', false);

    
      if (options.noSlideUp) {
        $(subnav).hide(); //hide it straight away.
        //also, if it was still sliding down at this stage.
        //it continues and the hide, doesn't happen, so 
        //add a timeout to reduce the likely hood.
        setTimeout(function() {
            if (!$.data(subnav, 'cancelHide')) {
                $(subnav).slideUp(options.speed);
            }
        }, 500);
      } else {
        setTimeout(function() {
            if (!$.data(subnav, 'cancelHide')) {
                $(subnav).slideUp(options.speed);
            }
        }, 500);
      }
    }
  
    function show() {
      var subnav = getSubnav(this);
      if (!subnav) return;
      $.data(subnav, 'cancelHide', true);
      $(subnav).css({zIndex: zIndex++}).slideDown(options.speed);
      if (this.nodeName.toLowerCase() == 'ul') {
        var li = getActuator(this);
        $(li).addClass('hover');
        $('> a', li).addClass('hover');
      }
    }
    
    $('ul, li', this).hover(show, hide);
    $('li', this).hover(
      function() { $(this).addClass('hover'); $('> a', this).addClass('hover'); },
      function() { $(this).removeClass('hover'); $('> a', this).removeClass('hover'); }
    );
    
  });
  
};