/*
 * jQuery Cycle Lite Plugin
 * http://malsup.com/jquery/cycle/lite/
 * Copyright (c) 2008 M. Alsup
 * Version: 1.0 (06/08/2008)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 * Requires: jQuery v1.2.3 or later
 */
;(function($) {

   var ver = 'Lite-1.0';

   $.fn.cycle = function(options) {
      return this.each(function() {
         options = options || {};
        
         if (this.cycleTimeout) clearTimeout(this.cycleTimeout);
         this.cycleTimeout = 0;
         this.cyclePause = 0;
        
         var $cont = $(this);
         var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
         var els = $slides.get();
         if (els.length < 2) {
            if (window.console && window.console.log)
               window.console.log('terminating; too few slides: ' + els.length);
            return; // don't bother
         }

         // support metadata plugin (v1.0 and v2.0)
         var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.metadata ? $cont.metadata() : $.meta ? $cont.data() : {});
            
         opts.before = opts.before ? [opts.before] : [];
         opts.after = opts.after ? [opts.after] : [];
         opts.after.unshift(function(){
            opts.busy=0;
         });
            
         // allow shorthand overrides of width, height and timeout
         var cls = this.className;
         opts.width = parseInt((cls.match(/w:(\d+)/)||[])[1]) || opts.width;
         opts.height = parseInt((cls.match(/h:(\d+)/)||[])[1]) || opts.height;
         opts.timeout = parseInt((cls.match(/t:(\d+)/)||[])[1]) || opts.timeout;

         if ($cont.css('position') == 'static')
            $cont.css('position', 'relative');
         if (opts.width)
            $cont.width(opts.width);
         if (opts.height && opts.height != 'auto')
            $cont.height(opts.height);

         var first = 0;
         $slides.css({
            position: 'absolute',
            top:0,
            left:0
         }).hide().each(function(i) {
            $(this).css('z-index', els.length-i) 
         });
        
         $(els[first]).css('opacity',1).show(); // opacity bit needed to handle reinit case
         if ($.browser.msie) els[first].style.removeAttribute('filter');

         if (opts.fit && opts.width)
            $slides.width(opts.width);
         if (opts.fit && opts.height && opts.height != 'auto')
            $slides.height(opts.height);
         if (opts.pause)
            $cont.hover(function(){
               this.cyclePause=1;
            }, function(){
               this.cyclePause=0;
            });

         $.fn.cycle.transitions.fade($cont, $slides, opts);
        
         $slides.each(function() {
            var $el = $(this);
            this.cycleH = (opts.fit && opts.height) ? opts.height : $el.height();
            this.cycleW = (opts.fit && opts.width) ? opts.width : $el.width();
         });

         $slides.not(':eq('+first+')').css({
            opacity:0
         });
         if (opts.cssFirst)
            $($slides[first]).css(opts.cssFirst);

         if (opts.timeout) {
            // ensure that timeout and speed settings are sane
            if (opts.speed.constructor == String)
               opts.speed = {
                  slow: 600,
                  fast: 200
               }[opts.speed] || 400;
            if (!opts.sync)
               opts.speed = opts.speed / 2;
            while((opts.timeout - opts.speed) < 250)
               opts.timeout += opts.speed;
         }
         opts.speedIn = opts.speed;
         opts.speedOut = opts.speed;

         opts.slideCount = els.length;
         opts.currSlide = first;
         opts.nextSlide = 1;

         // fire artificial events
         var e0 = $slides[first];
         if (opts.before.length)
            opts.before[0].apply(e0, [e0, e0, opts, true]);
         if (opts.after.length > 1)
            opts.after[1].apply(e0, [e0, e0, opts, true]);
        
         if (opts.click && !opts.next)
            opts.next = opts.click;
         if (opts.next)
            $(opts.next).bind('click', function(){
               return advance(els,opts,opts.rev?-1:1)
            });
         if (opts.prev)
            $(opts.prev).bind('click', function(){
               return advance(els,opts,opts.rev?1:-1)
            });

         if (opts.timeout)
            this.cycleTimeout = setTimeout(function() {
               go(els,opts,0,!opts.rev)
            }, opts.timeout + (opts.delay||0));
      });
   };

   function go(els, opts, manual, fwd) {
      if (opts.busy) return;
      var p = els[0].parentNode, curr = els[opts.currSlide], next = els[opts.nextSlide];
      if (p.cycleTimeout === 0 && !manual)
         return;

      if (manual || !p.cyclePause) {
         if (opts.before.length)
            $.each(opts.before, function(i,o) { 
               o.apply(next, [curr, next, opts, fwd]);
            });
         var after = function() {
            if ($.browser.msie)
               this.style.removeAttribute('filter');
            $.each(opts.after, function(i,o) { 
               o.apply(next, [curr, next, opts, fwd]);
            });
         };

         if (opts.nextSlide != opts.currSlide) {
            opts.busy = 1;
            $.fn.cycle.custom(curr, next, opts, after);
         }
         var roll = (opts.nextSlide + 1) == els.length;
         opts.nextSlide = roll ? 0 : opts.nextSlide+1;
         opts.currSlide = roll ? els.length-1 : opts.nextSlide-1;
      }
      if (opts.timeout)
         p.cycleTimeout = setTimeout(function() {
            go(els,opts,0,!opts.rev)
         }, opts.timeout);
   };

   // advance slide forward or back
   function advance(els, opts, val) {
      var p = els[0].parentNode, timeout = p.cycleTimeout;
      if (timeout) {
         clearTimeout(timeout);
         p.cycleTimeout = 0;
      }
      opts.nextSlide = opts.currSlide + val;
      if (opts.nextSlide < 0) {
         opts.nextSlide = els.length - 1;
      }
      else if (opts.nextSlide >= els.length) {
         opts.nextSlide = 0;
      }
      go(els, opts, 1, val>=0);
      return false;
   };

   $.fn.cycle.custom = function(curr, next, opts, cb) {
      var $l = $(curr), $n = $(next);
      $n.css({
         opacity:0
      });
      var fn = function() {
         $n.animate({
            opacity:1
         }, opts.speedIn, opts.easeIn, cb)
      };
      $l.animate({
         opacity:0
      }, opts.speedOut, opts.easeOut, function() {
         $l.css({
            display:'none'
         });
         if (!opts.sync) fn();
      });
      if (opts.sync) fn();
   };

   $.fn.cycle.transitions = {
      fade: function($cont, $slides, opts) {
         $slides.not(':eq(0)').css('opacity',0);
         opts.before.push(function() {
            $(this).show()
         });
      }
   };

   $.fn.cycle.ver = function() {
      return ver;
   };

   // @see: http://malsup.com/jquery/cycle/lite/
   $.fn.cycle.defaults = {
      timeout:       4000,
      speed:         1000,
      next:          null,
      prev:          null,
      before:        null,
      after:         null,
      height:       'auto',
      sync:          1,
      fit:           0,
      pause:         0,
      delay:         0,
      slideExpr:     null
   };

})(jQuery);