/*
 *         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:              true
                }; 
                
                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);