/*

 * jQuery Cycle Plugin for light-weight slideshows

 * Examples and documentation at: http://malsup.com/jquery/cycle/

 *

 * @author: M. Alsup

 * @version: 1.0.2 (7/24/2007)

 * @requires jQuery v1.1.2 or later

 *

 * Based on the work of:

 *  1) Matt Oakes (http://portfolio.gizone.co.uk/applications/slideshow/)

 *  2) Torsten Baldes (http://medienfreunde.com/lab/innerfade/)

 */

(function($) {



$.fn.cycle = function(options) {

    return this.each(function() {

        if (options && options == 'stop') {

            if (this.cycleTimeout) clearTimeout(this.cycleTimeout);

            this.cycleTimeout = 0;

            return;

        }

        var $this = $(this), els = $this.children();

        if (els.length < 2) return; // don't bother



        var opts = $.extend({}, $.fn.cycle.defaults, options || {}, $.meta ? $this.data() : {});

        if (opts.autostop) opts.countdown = els.length-1;



        // allow shorthand overrides of width, height and timeout

        var cls = this.className;

        var w = parseInt((cls.match(/w:(\d+)/)||[])[1]) || opts.width

        var h = parseInt((cls.match(/h:(\d+)/)||[])[1]) || opts.height;

        opts.timeout = parseInt((cls.match(/t:(\d+)/)||[])[1]) || opts.timeout;



        // make sure the timeout and speed settings are sane

        if (opts.speed.constructor == String)

            opts.speed = {slow: 600, fast: 200}[opts.speed] || 400;

        while((opts.timeout - opts.speed) < 250)

            opts.timeout += opts.speed;



        if ($this.css('position') == 'static') $this.css('position', 'relative');

        if (w) $this.width(w);

        if (h && h != 'auto') $this.height(h);



        var $els = $(els).each(function(i){$(this).css('z-index', els.length-i);}).css('position','absolute').hide();

        if (opts.fit && w) $els.width(w);

        if (opts.fit && h && h != 'auto') $els.height(h);

        $(els[0]).show();



        if (opts.pause)

            $this.hover(function(){opts.paused=1;}, function(){opts.paused=0;});



        opts.current = opts.random ? (Math.floor(Math.random() * (els.length-1)))+1 : 1;

        opts.last = 0;

        this.cycleTimeout = setTimeout(function(){$.fn.cycle.go(els, opts)}, opts.timeout);

    });

};



$.fn.cycle.go = function (els, opts) {

    if (els[0].parentNode.cycleTimeout === 0) return;

    if (!opts.paused) {

        if (opts.fade) {

            $.fn.cycle.fadeToggle(els[opts.last], opts.speed);

            $.fn.cycle.fadeToggle(els[opts.current], opts.speed);

        }

        else {

            $(els[opts.last]).slideUp(opts.speed);

            $(els[opts.current]).slideDown(opts.speed);

        }



        if (opts.random) {

            opts.last = opts.current;

            while (opts.current == opts.last)

                opts.current = Math.floor(Math.random() * els.length);

        }

        else { // sequence

            var roll = (opts.current + 1) == els.length;

            opts.current = roll ? 0 : opts.current+1;

            opts.last    = roll ? els.length-1 : opts.current-1;

        }

    }

    if (opts.autostop && --opts.countdown == 0) return;

    setTimeout(function() { $.fn.cycle.go(els, opts) }, opts.timeout);

};



// this allows more flexibility than the core fade methods

$.fn.cycle.fadeToggle = function(el, speed){

   var $el = $(el);

   var to = $el.is(':visible') && $el.css('opacity') > 0 ? 0 : 1;

   if (to) $el.css('opacity',0).show();

   $el.fadeTo(speed, to, function() {

       to ? $(this).show() : $(this).hide();

   });

};



$.fn.cycle.defaults = {

    height:  'auto',   // container height

    fade:     1,       // true for fade, false for slide

    speed:    400,     // any valid fx speed value

    timeout:  4000,    // ms duration for each slide

    random:   0,       // true for random, false for sequence

    fit:      0,       // force slides to fit container

    pause:    0,       // true to enable "pause on hover"

    autostop: 0        // true to end slideshow after X slides have been shown (where X == slide count)

                       // (note that if random == true not all slides are guaranteed to have been shown)

};



})(jQuery);