/*
*     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:             800,
auto:            false,
pause:            2000,
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){
if(!options.vertical) {
$("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-left","-"+ w +"px"));
} else {
$("ul", obj).prepend($("ul li:last-child", obj).clone().css("margin-top",""));
}
$("ul", obj).append($("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).after(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-top",(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);