/*
 * 	Easy Slider 1.5 - 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
 *
 */
 
/*
 *	markup example for $("#slider").easySlider();
 *	
 * 	<div id="slider">
 *		<ul>
 *			<li><img src="images/01.jpg" alt="" /></li>
 *			<li><img src="images/02.jpg" alt="" /></li>
 *			<li><img src="images/03.jpg" alt="" /></li>
 *			<li><img src="images/04.jpg" alt="" /></li>
 *			<li><img src="images/05.jpg" alt="" /></li>
 *		</ul>
 *	</div>
 *
 */

(function($) {

	$.fn.easySlider = function(options){
		var defaults = {			
			prevId: 		"prevBtn",
			prevText: 		"Previous",
			nextId: 		"nextBtn",	
			nextText: 		"Next",
			controlsInParent: false,
			controlsPlace:	"after",
			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
		}; 
		
		var options = $.extend(defaults, options);  
				
		this.each(function() {  
			var obj = $(this); 				
			var s = obj.children().length;
			var w = obj.children().width(); 
			var h = obj.children().height();
			
			obj.width(w); 
			obj.height(h); 
			obj.css("overflow","hidden");
			
			var ts = s-1;
			var t = 0;
			
			obj.css("width", s * w);
			
			if(!options.vertical) obj.children().css('float','left');

			if(options.controlsShow){
				var html = options.controlsBefore;
				
				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;
				
				if (options.controlsPlace == "before") {
					if(options.controlsInParent) obj.parent().before(html);
					else obj.before(html);
				}
				else {
					if(options.controlsInParent) obj.parent().after(html);
					else obj.after(html);
				}										
			};
	
			$("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 animate(dir,clicked){
				var ot = t;				
				
				switch(dir) {
					case "next":
						t = ot >= ts ? (options.continuous ? 0 : ts) : t + 1;						
						break; 
					case "prev":
						t = t <= 0 ? (options.continuous ? ts : 0) : t - 1;
						break; 
					case "first":
						t = 0;
						break; 
					case "last":
						t = ts;
						break; 
					default:
						break; 
				};	
				
				var diff = Math.abs(ot - t);
				var speed = diff * options.speed;
				
				if(!options.vertical) {
					p = (t * w * -1);
					obj.animate({ 
							marginLeft: p 
						}, 
						speed
					);				
				} else {
					p = (t * h * -1);
					obj.animate({ 
							marginTop: p 
						}, 
						speed
					);					
				};
				
				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);
				};
			};

			var timeout;
			if(options.auto){;
				timeout = setTimeout(function() {
					animate("next", false);
				}, options.pause);
			};		
		
			if(!options.continuous && options.controlsFade){					
				$("a", "#" + options.prevId).hide();
				$("a", "#" + options.firstId).hide();				
			};				
			
		});
	  
	};

})(jQuery);