/*
 * 	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){
	  
		// default configuration properties
		var defaults = {			
			previd: 		'prevbtn',
			prevtext: 		'',
			nextid: 		'nextbtn',	
			nexttext: 		'',
			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:			5000,
			continuous:		false
		}; 
		
		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(); 
			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.vertical) $("li", obj).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;						
				$(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);
					$("ul",obj).animate(
						{ marginleft: p }, 
						speed
					);				
				} else {
					p = (t*h*-1);
					$("ul",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);
				};
				
			};
			// init
			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);