/*
 *      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
 *
 */
 
/*
 *      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:               '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:                  1000,
                        auto:                   false,
                        pause:                  7000,
                        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).append(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);