/*
 * 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: 2000,
 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);