/*

 * 	Easy Slider 1.7 - jQuery plugin

 *	written by Alen Grakalic	

 *	http://cssglobe.com/post/4004/easy-slider-15-the-easiest-jquery-plugin-for-sliding

 *

 *	Copyright (c) 2009 Alen Grakalic (http://cssglobe.com)

 *	Dual licensed under the MIT (MIT-LICENSE.txt)

 *	and GPL (GPL-LICENSE.txt) licenses.

 *

 *	Built for jQuery library

 *	http://jquery.com

 *

 */



(function($) {



	$.fn.easySlider = function(options){

	  

		// default configuration properties

		var defaults = {			

			prevId: 		'prevBtn',

			prevText: 		'Previous',

			nextId: 		'nextBtn',	

			nextText: 		'Next',

			controlsShow:	true,

			controlsBefore:	'',

			controlsAfter:	'',	

			controlsFade:	true,

			firstId: 		'firstBtn',

			firstText: 		'First',

			firstShow:		false,

			lastId: 		'lastBtn',	

			lastText: 		'Last',

			lastShow:		false,				

			vertical:		false,

			speed: 			800,

			auto:			false,

			pause:			2000,

			continuous:		false, 

			numeric: 		false,

			numericId: 		'controls'

		}; 

		

		var options = $.extend(defaults, options);  

				

		this.each(function() {  

			var obj = $(this); 				

			var s = $("li", obj).length;

			var w = $("li", obj).width(); 

			var h = $("li", obj).height(); 

			var clickable = true;

			obj.width(w); 

			obj.height(h); 

			obj.css("overflow","hidden");

			var ts = s-1;

			var t = 0;

			$("ul", obj).css('width',s*w);			

			

			if(options.continuous){

				$("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left","-"+ w +"px"));

				$("ul", obj).append($("ul li:nth-child(2)", obj).clone());

				$("ul", obj).css('width',(s+1)*w);

			};				

			

			if(!options.vertical) $("li", obj).css('float','left');

								

			if(options.controlsShow){

				var html = options.controlsBefore;				

				if(options.numeric){

					html += '<ol id="'+ options.numericId +'"></ol>';

				} else {

					if(options.firstShow) html += '<span id="'+ options.firstId +'"><a href=\"javascript:void(0);\">'+ options.firstText +'</a></span>';

					html += ' <span id="'+ options.prevId +'"><a href=\"javascript:void(0);\">'+ options.prevText +'</a></span>';

					html += ' <span id="'+ options.nextId +'"><a href=\"javascript:void(0);\">'+ options.nextText +'</a></span>';

					if(options.lastShow) html += ' <span id="'+ options.lastId +'"><a href=\"javascript:void(0);\">'+ options.lastText +'</a></span>';				

				};

				

				html += options.controlsAfter;						

				$(obj).after(html);										

			};

			

			if(options.numeric){									

				for(var i=0;i<s;i++){						

					$(document.createElement("li"))

						.attr('id',options.numericId + (i+1))

						.html('<a rel='+ i +' href=\"javascript:void(0);\">'+ (i+1) +'</a>')

						.appendTo($("#"+ options.numericId))

						.click(function(){							

							animate($("a",$(this)).attr('rel'),true);

						}); 												

				};							

			} else {

				$("a","#"+options.nextId).click(function(){		

					animate("next",true);

				});

				$("a","#"+options.prevId).click(function(){		

					animate("prev",true);				

				});	

				$("a","#"+options.firstId).click(function(){		

					animate("first",true);

				});				

				$("a","#"+options.lastId).click(function(){		

					animate("last",true);				

				});				

			};

			

			function setCurrent(i){

				i = parseInt(i)+1;

				$("li", "#" + options.numericId).removeClass("current");

				$("li#" + options.numericId + i).addClass("current");

			};

			

			function adjust(){

				if(t>ts) t=0;		

				if(t<0) t=ts;	

				if(!options.vertical) {

					$("ul",obj).css("margin-left",(t*w*-1));

				} else {

					$("ul",obj).css("margin-left",(t*h*-1));

				}

				clickable = true;

				if(options.numeric) setCurrent(t);

			};

			

			function animate(dir,clicked){

				if (clickable){

					clickable = false;

					var ot = t;				

					switch(dir){

						case "next":

							t = (ot>=ts) ? (options.continuous ? t+1 : ts) : t+1;						

							break; 

						case "prev":

							t = (t<=0) ? (options.continuous ? t-1 : 0) : t-1;

							break; 

						case "first":

							t = 0;

							break; 

						case "last":

							t = ts;

							break; 

						default:

							t = dir;

							break; 

					};	

					var diff = Math.abs(ot-t);

					var speed = diff*options.speed;						

					if(!options.vertical) {

						p = (t*w*-1);

						$("ul",obj).animate(

							{ marginLeft: p }, 

							{ queue:false, duration:speed, complete:adjust }

						);				

					} else {

						p = (t*h*-1);

						$("ul",obj).animate(

							{ marginTop: p }, 

							{ queue:false, duration:speed, complete:adjust }

						);					

					};

					

					if(!options.continuous && options.controlsFade){					

						if(t==ts){

							$("a","#"+options.nextId).hide();

							$("a","#"+options.lastId).hide();

						} else {

							$("a","#"+options.nextId).show();

							$("a","#"+options.lastId).show();					

						};

						if(t==0){

							$("a","#"+options.prevId).hide();

							$("a","#"+options.firstId).hide();

						} else {

							$("a","#"+options.prevId).show();

							$("a","#"+options.firstId).show();

						};					

					};				

					

					if(clicked) clearTimeout(timeout);

					if(options.auto && dir=="next" && !clicked){;

						timeout = setTimeout(function(){

							animate("next",false);

						},diff*options.speed+options.pause);

					};

			

				};

				

			};

			// init

			var timeout;

			if(options.auto){;

				timeout = setTimeout(function(){

					animate("next",false);

				},options.pause);

			};		

			

			if(options.numeric) setCurrent(0);

		

			if(!options.continuous && options.controlsFade){					

				$("a","#"+options.prevId).hide();

				$("a","#"+options.firstId).hide();				

			};				

			

		});

	  

	};



})(jQuery);