// JavaScript Document
(function($) {
	$.fn.scrollablecombo = function(options) {
		var opts = $.extend({}, $.fn.scrollablecombo.defaults, options);
		return this.each(function() {
			$this = $(this);
			var o = $.meta ? $.extend({}, opts, $this.data()) : opts;
			
			function findHighestZIndex(){
				var divs = document.getElementsByTagName('div');
				var highest = 0;
				for (var i = 0; i < divs .length; i++)
				{
					var zindex = divs[i].style.zIndex;
					if (zindex > highest) {
						highest = zindex;
					}
				}
				return highest;
			}

			/** 
			* Download by http://www.codefans.net
			* graceful degradation
			*/
			$this.hide();
			
			function makeScrollable($wrapper, $container){
				var extra 			= 50;
				var wrapperHeight 	= $wrapper.height() ;
				$wrapper.css({overflow: 'hidden'});
				$wrapper.scrollTop(0);
				$wrapper.unbind('mousemove').bind('mousemove',function(e){
					var ulHeight 	= $container.outerHeight() + 2*extra ;
					var top 		= (e.pageY - $wrapper.offset().top) * (ulHeight-wrapperHeight ) / wrapperHeight - extra;
					$wrapper.scrollTop(top);
				});
			}
			
			/**
			* let's build our element structure
			*/
			var $ul_e 	= $('<ul />');
			
			$this.find('option').each(function(){
				var $option = $(this);
				var liclass = '';
				if($option.attr('selected'))
					liclass = 'selected';
				var $li_e 	= $('<li />',{
					className	:	liclass,
					html		:	'<a href="'+$option.val()+'">'+$option.html()+'</a>'
				});
				$ul_e.append($li_e);
			});
			
			var $wrapper_e 	= $('<div />',{
				className	:	'cb_selectWrapper'
			});
			
			$wrapper_e.append($ul_e);
			
			var $control_e 	= $('<div />',{
				//id			:	'ui_element',
				className	:	'cb_selectMain cb_down'
			});
			
			var $select_e 	= $('<div />',{
				className	:	'cb_select'
			});
			
			$select_e.append($wrapper_e).append($control_e);
			
			var $selected	= $ul_e.find('.selected');
			
			
			function openCombo(){
				var maxzidx = Math.max(findHighestZIndex(),99999);
				$wrapper_e.css('z-index',parseInt(maxzidx+1000)).show();
				$control_e.addClass('cb_up').removeClass('cb_down');
				makeScrollable($wrapper_e,$ul_e);
			}
			function closeCombo(){
				$wrapper_e.css('z-index',1000).hide();
				$control_e.addClass('cb_down').removeClass('cb_up');
			}
			$control_e.html($selected.find('a').html())
					  .bind('click',function(){
					  
						  (!$wrapper_e.is(':visible'))? openCombo() : closeCombo();
					  }
			);
			$selected.hide();
			
			$this.parent().append($select_e);
			$this.remove();
			
			$ul_e.find('a').bind('click',function(e){
			
			$('#ui_element_value').val($(this).attr('href'));
			//alert($('#ui_element_value').val());
				var $this 		= $(this);
				$control_e.html($this.html());
				var $selected	= $ul_e.find('.selected');
				$selected.show().removeClass('selected');
				$this.parent().addClass('selected').hide();
				closeCombo();
				e.preventDefault();
			});
			
			
			
		});
	};
	$.fn.scrollablecombo.defaults = {
		
	};
})(jQuery);
jQuery.fn.extend({
	selectbox: function(options) {
		return this.each(function() {
			new jQuery.SelectBox(this, options);
		});
	}
});


/* pawel maziarz: work around for ie logging */
if (!window.console) {
	var console = {
		log: function(msg) { 
	 }
	}
}
/* */

jQuery.SelectBox = function(selectobj, options) {
	
	var opt = options || {};
	opt.inputClass = opt.inputClass || "selectbox";
	opt.containerClass = opt.containerClass || "selectbox-wrapper";
	opt.hoverClass = opt.hoverClass || "current";
	opt.currentClass = opt.selectedClass || "selected"
	opt.debug = opt.debug || false;
	
	var elm_id = selectobj.id;
	var active = 0;
	var inFocus = false;
	var hasfocus = 0;
	//jquery object for select element
	var $select = $(selectobj);
	// jquery container object
	var $container = setupContainer(opt);
	//jquery input object 
	var $input = setupInput(opt);
	// hide select and append newly created elements
	$select.hide().before($input).before($container);
	
	
	init();
	
	$input
	.click(function(){
    if (!inFocus) {
		  $container.toggle();
		}
	})
	.focus(function(){
	   if ($container.not(':visible')) {
	       inFocus = true;
	       $container.show();
	   }
	})
	.keydown(function(event) {	   
		switch(event.keyCode) {
			case 38: // up
				event.preventDefault();
				moveSelect(-1);
				break;
			case 40: // down
				event.preventDefault();
				moveSelect(1);
				break;
			//case 9:  // tab 
			case 13: // return
				event.preventDefault(); // seems not working in mac !
				$('li.'+opt.hoverClass).trigger('click');
				break;
			case 27: //escape
			  hideMe();
			  break;
		}
	})
	.blur(function() {
		if ($container.is(':visible') && hasfocus > 0 ) {
			if(opt.debug) console.log('container visible and has focus')
		} else {
		  // Workaround for ie scroll - thanks to Bernd Matzner
		  if($.browser.msie || $.browser.safari){ // check for safari too - workaround for webkit
        
      } else {
        hideMe();
      }
		}
	});


	function hideMe() { 
		hasfocus = 0;
		$container.hide(); 
	}
	
	function init() {
		$container.append(getSelectOptions($input.attr('id'))).hide();
		var width = $input.css('width');
		$container.width(width);
    }
	
	function setupContainer(options) {
		var container = document.createElement("div");
		$container = $(container);
		$container.attr('id', elm_id+'_container');
		$container.addClass(options.containerClass);
		
		return $container;
	}
	
	function setupInput(options) {
		var input = document.createElement("input");
		var $input = $(input);
		$input.attr("id", elm_id+"_input");
		$input.attr("type", "text");
		$input.addClass(options.inputClass);
		$input.attr("autocomplete", "off");
		$input.attr("readonly", "readonly");
		$input.attr("tabIndex", $select.attr("tabindex")); // "I" capital is important for ie
		
		return $input;	
	}
	
	function moveSelect(step) {
		var lis = $("li", $container);
		if (!lis || lis.length == 0) return false;
		active += step;
    //loop through list
		if (active < 0) {
			active = lis.size();
		} else if (active > lis.size()) {
			active = 0;
		}
    scroll(lis, active);
		lis.removeClass(opt.hoverClass);

		$(lis[active]).addClass(opt.hoverClass);
	}
	
	function scroll(list, active) {
      var el = $(list[active]).get(0);
      var list = $container.get(0);
      
      if (el.offsetTop + el.offsetHeight > list.scrollTop + list.clientHeight) {
        list.scrollTop = el.offsetTop + el.offsetHeight - list.clientHeight;      
      } else if(el.offsetTop < list.scrollTop) {
        list.scrollTop = el.offsetTop;
      }
	}
	
	function setCurrent() {	
		var li = $("li."+opt.currentClass, $container).get(0);
		var ar = (''+li.id).split('_');
		var el = ar[ar.length-1];
		$select.val(el);
		$input.val($(li).html());
		return true;
	}
	
	// select value
	function getCurrentSelected() {
	
		return $select.val();
	}
	
	// input value
	function getCurrentValue() {
		return $input.val();
	}
	
	function getSelectOptions(parentid) {
		var select_options = new Array();
		var ul = document.createElement('ul');
		$select.children('option').each(function() {
			var li = document.createElement('li');
			li.setAttribute('id', parentid + '_' + $(this).val());
			li.innerHTML = $(this).html();
			if ($(this).is(':selected')) {
				$input.val($(this).html());
				$(li).addClass(opt.currentClass);
			}
			ul.appendChild(li);
			$(li)
			.mouseover(function(event) {
				hasfocus = 1;
				if (opt.debug) console.log('over on : '+this.id);
				jQuery(event.target, $container).addClass(opt.hoverClass);
			})
			.mouseout(function(event) {
				hasfocus = -1;
				if (opt.debug) console.log('out on : '+this.id);
				jQuery(event.target, $container).removeClass(opt.hoverClass);
			})
			.click(function(event) {
			  var fl = $('li.'+opt.hoverClass, $container).get(0);
				if (opt.debug) console.log('click on :'+this.id);
				$('#' + elm_id + '_container' + ' li.'+opt.currentClass).removeClass(opt.currentClass); 
				$(this).addClass(opt.currentClass);
				setCurrent();
				//$select.change();
				$select.get(0).blur();
				hideMe();
			});
		});
		return ul;
	}
	
	
	
};