/*
 * jQuery selectbox plugin
 *
 * Copyright (c) 2007 Sadri Sahraoui (brainfault.com)
 * Licensed under the GPL license and MIT:
 *   http://www.opensource.org/licenses/GPL-license.php
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * The code is inspired from Autocomplete plugin (http://www.dyve.net/jquery/?autocomplete)
 *
 * Revision: $Id$
 * Version: 1.2
 * 
 * Changelog :
 *  Version 1.2 By Guillaume Vergnolle (web-opensource.com)
 *  - Add optgroup support
 *  - possibility to choose between span or input as replacement of the select box
 *  - support for jquery change event
 *  - add a max height option for drop down list
 *  Version 1.1 
 *  - Fix IE bug
 *  Version 1.0
 *  - Support jQuery noConflict option
 *  - Add callback for onChange event, thanks to Jason
 *  - Fix IE8 support
 *  - Fix auto width support
 *  - Fix focus on firefox dont show the carret
 *  Version 0.6
 *  - Fix IE scrolling problem
 *  Version 0.5 
 *  - separate css style for current selected element and hover element which solve the highlight issue 
 *  Version 0.4
 *  - Fix width when the select is in a hidden div   @Pawel Maziarz
 *  - Add a unique id for generated li to avoid conflict with other selects and empty values @Pawel Maziarz
 */
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.inputType        = opt.inputType || "input";
	opt.inputClass       = opt.inputClass || "selectbox";
	opt.containerClass   = opt.containerClass || "selectbox-wrapper";
	opt.hoverClass       = opt.hoverClass || "current";
	opt.currentClass     = opt.currentClass || "selected";
	opt.groupClass       = opt.groupClass || "optgroup"; //css class for group
	opt.maxHeight        = opt.maxHeight || 200; // max height of dropdown list
	opt.loopnoStep       = opt.loopnoStep || false; // to remove the step in list moves loop
	opt.onChangeCallback = opt.onChangeCallback || false;
	opt.onChangeParams   = opt.onChangeParams || false;
	opt.debug            = opt.debug || true;
	
	/* TIES HACK */
	opt.arrow_align      = opt.arrow_align || false;
	opt.arrow_x          = opt.arrow_x || false;
	opt.arrow_y          = opt.arrow_y || false;
	
	opt.multiboxClass    = opt.multiboxClass || "multibox-wrapper";
	/* END TIES HACK */
	
	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);
	
	/* TIES HACK */
	//check if its an multiple select
	var is_multiple = $select.attr("multiple") || false;
	/* END TIES HACK */
	
	//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();
			
			/* TIES HACK */
			var left_px = $input.position().left;
			$container.css("left", left_px+'px');
			   
			var top_px = ($input.position().top) + ($input.height()) + 11;
			$container.css("top", top_px+'px');
			/* END TIES HACK */
		}
	})
	.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((jQuery.browser.msie && jQuery.browser.version.substr(0,1) <= 8) || jQuery.browser.safari){ // check for safari too - workaround for webkit
				if(document.activeElement.getAttribute('id').indexOf('_container') == -1){
					hideMe();
				} else {
					$input.focus();
				}
			} else {
				hideMe();
			}
		}
	});

	function hideMe() { 
		hasfocus = 0;
		$container.hide(); 
	}
	
	function init() {
		
		/* TIES HACK */
		var background_pos = '';
		var input_width    = $input.width();
		
		if(opt.arrow_align != false)
		{
		    if(opt.arrow_align == 'right')
			{
				if(input_width <= 0){
					input_width = 200;	
				}
				background_pos = ""+(input_width - opt.arrow_x)+""; 
			} else if(opt.arrow_align == 'left')
			{
				background_pos = ""+opt.arrow_x+""; 
			}
			$input.css("background-position", ""+background_pos+"px "+opt.arrow_y+"px");
		}
		/* END TIES HACK */
		
		$container.append(getSelectOptions($input.attr("id"))).hide();
		var width = $input.css("width");
		if($container.height() > opt.maxHeight)
		{
			$container.width(parseInt(width)+parseInt($input.css("paddingRight"))+parseInt($input.css("paddingLeft")));
			$container.height(opt.maxHeight);
		} else $container.width(width);
		
		/* TIES HACK */
		if(is_multiple == true)
		{	
			$container.removeClass(opt.containerClass);
			$container.addClass(opt.multiboxClass);
            $container.show();
			
			$input.hide();
		}
		/* END TIES HACK */
		
	}
	
	function setupContainer(options) {
		
		var container = document.createElement("div");
		$container = $(container);
		$container.attr("id", ""+elm_id+"_container");
		$container.addClass(options.containerClass);
        	$container.css("display", "none");
		
		return $container;
	}
	
	function setupInput(options){
		
		if(opt.inputType == "span")
		{
			var input  = document.createElement("span");
			var $input = $(input);
			$input.attr("id", ""+elm_id+"_input");
			$input.addClass(options.inputClass);
			$input.attr("tabIndex", $select.attr("tabindex"));
		} 
		else 
		{
			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
			$input.css("width", $select.css("width"));
        }
		return $input;	
	}
	
	function moveSelect(step) {
		
		var lis = $("li", $container);
		if (!lis || lis.length == 0) return false;
		// find the first non-group (first option)
		firstchoice = 0;
		while($(lis[firstchoice]).hasClass(opt.groupClass)) firstchoice++;
		active += step;
    		// if we are on a group step one more time
    		if($(lis[active]).hasClass(opt.groupClass)) active += step;
			
		//loop through list from the first possible option
		if (active < firstchoice)
		{
			(opt.loopnoStep ? active = lis.size()-1 : active = lis.size());
		}
		else if (opt.loopnoStep && active > lis.size()-1) 
		{
			active = firstchoice;
		}
		else if (active > lis.size()) 
		{
			active = firstchoice;
		}
        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);
		/* TIES HACK */
		/* 
		var ar = (''+li.id).split('_');
		var el = ar[ar.length-1]; 
		*/
		var input_id = $input.attr("id");
		var li_id    = li.id;
		var el       = li_id.replace(input_id+"_", "");
		/* TIES HACK */
		
		if (opt.onChangeCallback)
		{
        		$select.get(0).selectedIndex = $('li', $container).index(li);
        		opt.onChangeParams = { selectedVal : $select.val() };
			    opt.onChangeCallback(opt.onChangeParams);
		}
		else 
		{
			$select.val(el);
			$select.trigger("change");
		}
		
		
		if(opt.inputType == "span")
		{
			$input.html($(li).html());
		} else {
		    $input.val($(li).html());
		}
		return true;
	}
	
	
	
	
	/* TIES HACK */
	function addCurrent(clicked_element) {	
		
        var input_id = $input.attr("id");
		var li_id    = $(clicked_element).attr("id");
		var el       = li_id.replace(input_id+"_", "");
		
		if (opt.onChangeCallback)
		{
        		$select.get(0).selectedIndex = $('li', $container).index(li);
        		opt.onChangeParams = { selectedVal : $select.val() };
			    opt.onChangeCallback(opt.onChangeParams);
		}
		else 
		{
			
			if($(clicked_element).hasClass(opt.currentClass))
			{
				$select.children().each(function(i)
				{
					var clicked = $(this).attr("value");
					if(clicked == el)
					{
						$(clicked_element).removeClass(opt.currentClass);
						$(this).attr("selected", false);
					}
				});	
			} else {
			   
			   $select.children().each(function(i)
				{
					var clicked = $(this).attr("value");
					if(clicked == el)
					{
						$(clicked_element).addClass(opt.currentClass);
						$(this).attr("selected", "selected");
					}
				});
			}
			
			$select.trigger("change");
		}
		return true;
	}
	/* END TIES HACK */	
	
	
	
	// 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_options = $select.children('option');
		
		if(select_options.length == 0) 
		{
			var select_optgroups = new Array();
			select_optgroups = $select.children('optgroup');

			for(x=0; x < select_optgroups.length; x++)
			{   
				
				select_options = $(select_optgroups[x]).children('option');
				var li = document.createElement('li');
				
				li.setAttribute("id", ""+parentid+"_"+$(this).val()+"");
				li.innerHTML = $(select_optgroups[x]).attr('label');
				li.className = opt.groupClass;
				ul.appendChild(li);
				
				select_options.each(function() {
					var li = document.createElement('li');
					li.setAttribute("id", ""+parentid+"_"+$(this).val()+"");
					li.innerHTML = $(this).html();
					if ($(this).is(":selected")) 
					{
						if(opt.inputType == "span")
						{
						    $input.html($(this).html());
						} else {
						    $input.val($(this).html());	
						}
						$(li).addClass(opt.currentClass);
					}
					ul.appendChild(li);
					$(li)
					.mouseover(function(event){
										
						hasfocus = 1;
						if (opt.debug) console.log("over on : "+this.id+"");
						$(event.target, $container).addClass(opt.hoverClass);
					})
					.mouseout(function(event){
									   
						hasfocus = -1;
						if (opt.debug) console.log("out on : "+this.id+"");
						$(event.target, $container).removeClass(opt.hoverClass);
					})
					.click(function(event) {
						
						/* TIES HACK */
						if(is_multiple == true)
						{
						    var fl = $("li."+opt.hoverClass+"", $container).get(0);
					        addCurrent(this);
					        $select.get(0).blur();
						} else {
						/* END TIES HACK */		
						
							var fl = $("li."+opt.hoverClass+"", $container).get(0);
							if (opt.debug) console.log("click on :"+this.id+"");
							$("li."+opt.currentClass+"", $container).removeClass(opt.currentClass); 
							$(this).addClass(opt.currentClass);
							setCurrent();
							$select.get(0).blur();
							hideMe();
						}
						
					});
				});
			}
		} else select_options.each(function(){
											
			var li = document.createElement('li');
			li.setAttribute("id", ""+parentid+"_"+$(this).val()+"");
			li.innerHTML = $(this).html();
			
			if ($(this).is(":selected")) 
			{
				if(opt.inputType == "span")
				{
				    $input.html($(this).html());
				} else {
				    $input.val($(this).html());	
				}
				$(li).addClass(opt.currentClass);
			}
			ul.appendChild(li);
			
			$(li)
			.mouseover(function(event){
								
				hasfocus = 1;
				if (opt.debug) console.log("over on : "+this.id+"");
				$(event.target, $container).addClass(opt.hoverClass);
			})
			.mouseout(function(event){
							   
				hasfocus = -1;
				if (opt.debug) console.log("out on : "+this.id+"");
				$(event.target, $container).removeClass(opt.hoverClass);
			})
			.click(function(event){

				/* TIES HACK */
				if(is_multiple == true)
				{
					var fl = $("li."+opt.hoverClass+"", $container).get(0);
					addCurrent(this);
					$select.get(0).blur();
				
				} else {
				/* END TIES HACK */		
				
					var fl = $("li."+opt.hoverClass+"", $container).get(0);
					if (opt.debug) console.log("click on :"+this.id+"");
					$("li."+opt.currentClass+"", $container).removeClass(opt.currentClass); 
					$(this).addClass(opt.currentClass);
					setCurrent();
					$select.get(0).blur();
					hideMe();
				}

			});
		});
		return ul;
	}
};