/*
2 * loopedCarousel 0.5 - jQuery plugin
3 * written by Nathan Searles, based on loopedSlider (http://github.com/nathansearles/loopedSlider)
4 * http://github.com/nathansearles/loopedCarousel
5 *
6 * Copyright (c) 2009 Nathan Searles (http://nathansearles.com/)
7 * Dual licensed under the MIT (MIT-LICENSE.txt)
8 * and GPL (GPL-LICENSE.txt) licenses.
9 *
10 * Built for jQuery library
11 * http://jquery.com
12 *
13 */

/*
16 * markup example for $("#loopedCarousel").loopedCarousel();
17 *
18 * <div id="loopedCarousel">
19 * <div class="container">
20 * <div class="slides">
21 * <div>1</div>
22 * <div>2</div>
23 * <div>3</div>
24 * <div>4</div>
25 * <div>5</div>
26 * <div>6</div>
27 * <div>7</div>
28 * <div>8</div>
29 * <div>9</div>
30 * <div>10</div>
31 * <div>11</div>
32 * <div>12</div>
33 * <div>13</div>
34 * <div>14</div>
35 * <div>15</div>
36 * </div>
37 * </div>
38 * <a href="#" class="previous">previous</a>
39 * <a href="#" class="next">next</a>
40 * </div>
41 *
42 */

(function($) {
 $.fn.loopedCarousel = function(options) {

 var defaults = {
 container: '.container',
 slides: '.slides',
 pagination: '.pagination',
 autoStart: 0, // Set to positive number for auto interval and interval time
 slidespeed: 300, // Speed of slide animation
 fadespeed: 300, // Speed of fade animation
 items: 4, // Items show
 padding: 40, // Padding between items
 showPagination: false, // Shows pagination links
 vertical: false
 };

 this.each(function() {
 var obj = $(this);
 var o = $.extend(defaults, options);
 var i = o.items;
 var m = 0;
 var t = 1;
 var s = $(o.slides,obj).children().size();
 var w = $(o.slides,obj).children().outerWidth()+o.padding;
 var h = $(o.slides,obj).children().outerHeight()+o.padding;
 var c = Math.ceil($(o.slides,obj).children().size()/i);
 var pd = o.padding/2;
 var p = 0;
 var u = false;
 var n = 0;
 var pt = 0;
 var os = i*c-s;
 var params = {};

 if (o.vertical===true) { w = h; }

 if(o.showPagination){
 var buttons = s/i;
 $(obj).append('<ul class="pagination">');
 $(o.slides,obj).children().each(function(){
 if (n<buttons) {
 $(o.pagination,obj).append('<li><a rel="'+(n+1)+'" href="#" >'+(n+1)+'</a></li>');
 n = n+1;
 } else {
 n = 0;
 return false;
 }
 $(o.pagination+' li a:eq(0)',obj).parent().addClass('active');
 });
 }

 if (o.vertical===true) {
 $(o.container,obj).css({height:(w*i)});
 $(o.slides,obj).css({height:(s*w)});
 } else {
 $(o.container,obj).css({width:(w*i)});
 $(o.slides,obj).css({width:(s*w)});
 }

 $(o.slides,obj).children().each(function(){
 if (o.vertical===true) {
 $(this).css({position:'absolute',top:p+pd,display:'block'});
 } else {
 $(this).css({position:'absolute',left:p+pd,display:'block'});
 }
 p=p+w;
 });

 $(o.slides,obj).children().each(function(){
 pt = pt+1;
 if (pt<i+1) {
 params[o.vertical ? 'top' : 'left'] = (-w*pt)+pd-(w*os);
 $(o.slides,obj).children(':eq('+(s-pt)+')').css(params);
 }
 if (pt===i+2) {
 pt = 0;
 return false;
 }
 });

 $('.next',obj).click(function(){
 if(u===false) {
 animate('next',true);
 if(o.autoStart){clearInterval(sliderIntervalID);}
 }
 return false;
 });

 $('.previous',obj).click(function(){
 if(u===false) {
 animate('prev',true);
 if(o.autoStart){clearInterval(sliderIntervalID);}
 } return false;
 });

 $(o.pagination+' li a',obj).click(function(){
 if ($(this).parent().hasClass('active')) {return false;}
 else {
 t = $(this).attr('rel');
 $(o.pagination+' li a',obj).parent().siblings().removeClass('active');
 $(this).parent().addClass('active');
 animate('fade',t);
 if(o.autoStart){clearInterval(sliderIntervalID);}
 } return false;
 });

 if (o.autoStart) {
 sliderIntervalID = setInterval(function(){
 if(u===false) {animate('next',true);}
 }, o.autoStart);
 }

 function current(t) {
 if(t===c+1){t=1;}
 if(t===0){t=c;}
 $(o.pagination+' li a',obj).parent().siblings().removeClass('active');
 $(o.pagination+' li a[rel="' + (t) + '"]',obj).parent().addClass('active');
 }

 function animate(dir,clicked){
 u = true;
 switch(dir){
 case 'next':
 t = t+1;
 m = (-(t*w-w)*i);
 current(t);
 params[o.vertical ? 'top' : 'left'] = m;
 $(o.slides,obj).animate(params, o.slidespeed,function(){
 if (t===c+1) {
 t = 1;
 params[o.vertical ? 'top' : 'left'] = 0;
 $(o.slides,obj).css(params,function(){
 $(o.slides,obj).animate(params);
 });
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = (w*pt)+pd;
 $(o.slides,obj).children(':eq('+pt+')').css(params);
 params[o.vertical ? 'top' : 'left'] = -(w*(pt+os+1)-pd);
 $(o.slides,obj).children(':eq('+(s-(pt+1))+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }
 if (t===c) {
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;
 $(o.slides,obj).children(':eq('+(pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }
 if (t===2) {
 $(o.slides,obj).children().each(function(){
 pt = pt+1;
 if (pt<i+1) {
 params[o.vertical ? 'top' : 'left'] = ((w*s)+pd)-(w*pt);
 $(o.slides,obj).children(':eq('+(s-pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 });
 }
 u = false;
 });
 break;
 case 'prev':
 t = t-1;
 m = (-(t*w-w)*i);
 current(t);
 params[o.vertical ? 'top' : 'left'] = m;
 $(o.slides,obj).animate(params, o.slidespeed,function(){
 if (t===0) {
 t = c;
 params[o.vertical ? 'top' : 'left'] = -w*(s-i)-(w*os);
 $(o.slides,obj).css(params);
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;
 $(o.slides,obj).children(':eq('+pt+')').css(params);
 params[o.vertical ? 'top' : 'left'] = (s*w)+pd-(pt*w)-w;
 $(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }
 if (t===2) {
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = (w*pt)+pd;
 $(o.slides,obj).children(':eq('+pt+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }
 if (t===1) {
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = -(w*pt)-w+pd-(w*os);
 $(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }

 u = false;
 });
 break;
 case 'fade':
 t = [t]*1;
 m = (-(t*w-w)*i);
 current(t);
 $(o.slides,obj).children().fadeOut(o.fadespeed, function(){
 params[o.vertical ? 'top' : 'left'] = m;
 $(o.slides,obj).css(params);
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = (pt*w)+pd;
 $(o.slides,obj).children(':eq('+pt+')').css(params);
 params[o.vertical ? 'top' : 'left'] = w*(s-pt)-w+pd;
 $(o.slides,obj).children(':eq('+((s-1)-pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });

 if(t===c){
 $(o.slides,obj).children().each(function(){
 if (pt<i) {
 params[o.vertical ? 'top' : 'left'] = w*(s+pt+os)+pd;
 $(o.slides,obj).children(':eq('+(pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 pt = pt+1;
 });
 }
 if(t===1){
 $(o.slides,obj).children().each(function(){
 pt = pt+1;
 if (pt<i+1) {
 params[o.vertical ? 'top' : 'left'] = -(w*pt)+pd-(w*os);
 $(o.slides,obj).children(':eq('+(s-pt)+')').css(params);
 } else {
 pt = 0;
 return false;
 }
 });
 }
 $(o.slides,obj).children().fadeIn(o.fadespeed);
 u = false;
 });
 break;
 default:
 break;
 }
 }
 });
 };
})(jQuery);