/*
 * jQuery Cycle Plugin for light-weight slideshows
 * Examples and documentation at: http://malsup.com/jquery/cycle/
 * Copyright (c) 2007-2008 M. Alsup
 * Version: 2.10 (02/10/2008)
 * 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 v1.1.3.1 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/)
 *  3) Benjamin Sterling (http://www.benjaminsterling.com/experiments/jqShuffle/)
 */
(function($) {

var ver = '2.10';
var ie6 = $.browser.msie && /MSIE 6.0/.test(navigator.userAgent);

$.fn.cycle = function(options) {
    return this.each(function() {
        options = options || {};
        if (options.constructor == String) {
            switch(options) {
            case 'stop':
                if (this.cycleTimeout) clearTimeout(this.cycleTimeout);
                this.cycleTimeout = 0;
                return;
            case 'pause':
                this.cyclePause = 1;
                return;
            case 'resume':
                this.cyclePause = 0;
                return;
            default:
                options = { fx: options };
            };
        }
        var $cont = $(this);
        var $slides = options.slideExpr ? $(options.slideExpr, this) : $cont.children();
        var els = $slides.get();
        if (els.length < 2) 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() : {});
        if (opts.autostop) 
            opts.countdown = opts.autostopCount || els.length;
            
        opts.before = opts.before ? [opts.before] : [];
        opts.after = opts.after ? [opts.after] : [];
        opts.after.unshift(function(){ opts.busy=0; });

        // clearType corrections
        if (ie6 && opts.cleartype && !opts.cleartypeNoBg)
            clearTypeFix($slides);

        // 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;

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

        if (opts.random) {
            opts.randomMap = [];
            for (var i = 0; i < els.length; i++) 
                opts.randomMap.push(i);
            opts.randomMap.sort(function(a,b) {return Math.random() - 0.5;});
            opts.randomIndex = 0;
            opts.startingSlide = opts.randomMap[0];
        }
        else if (opts.startingSlide >= els.length)
            opts.startingSlide = 0; // catch bogus input
        var first = opts.startingSlide || 0;
        $slides.css('position','absolute').hide().each(function(i) { 
            var z = first ? i >= first ? els.length - (i-first) : first-i : els.length-i;
            $(this).css('z-index', z) 
        });
        
        $(els[first]).show();
        if (opts.fit && w) 
            $slides.width(w);
        if (opts.fit && h && h != 'auto') 
            $slides.height(h);
        if (opts.pause) 
            $cont.hover(function(){this.cyclePause=1;}, function(){this.cyclePause=0;});

        // run transition init fn
        var init = $.fn.cycle.transitions[opts.fx];
        if ($.isFunction(init))
            init($cont, $slides, opts);

        $slides.each(function() {
            var $el = $(this);
            this.cycleH = (opts.fit && h) ? h : $el.height();
            this.cycleW = (opts.fit && w) ? w : $el.width();
        });

        opts.cssBefore = opts.cssBefore || {};
        opts.animIn = opts.animIn || {};
        opts.animOut = opts.animOut || {};

        $slides.not(':eq('+first+')').css(opts.cssBefore);
        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;
        }
        if (opts.easing) 
            opts.easeIn = opts.easeOut = opts.easing;
        if (!opts.speedIn) 
            opts.speedIn = opts.speed;
        if (!opts.speedOut) 
            opts.speedOut = opts.speed;

 		opts.slideCount = els.length;
        opts.currSlide = first;
        if (opts.random) {
            opts.nextSlide = opts.currSlide;
            if (++opts.randomIndex == els.length) 
                opts.randomIndex = 0;
            opts.nextSlide = opts.randomMap[opts.randomIndex];
        }
        else
            opts.nextSlide = opts.startingSlide >= (els.length-1) ? 0 : opts.startingSlide+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.pager)
            buildPager(els,opts);
        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 && 
        ((opts.autostop && (--opts.countdown <= 0)) ||
        (opts.nowrap && !opts.random && opts.nextSlide < opts.currSlide)))
        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 && opts.cleartype)
                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;
            if (opts.fxFn)
                opts.fxFn(curr, next, opts, after, fwd);
            else if ($.isFunction($.fn.cycle[opts.fx]))
                $.fn.cycle[opts.fx](curr, next, opts, after);
            else
                $.fn.cycle.custom(curr, next, opts, after);
        }
        if (opts.random) {
            opts.currSlide = opts.nextSlide;
            if (++opts.randomIndex == els.length) 
                opts.randomIndex = 0;
            opts.nextSlide = opts.randomMap[opts.randomIndex];
        }
        else { // sequence
            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.pager)
            $(opts.pager).find('a').removeClass('activeSlide').filter('a:eq('+opts.currSlide+')').addClass('activeSlide');
    }
    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) {
        if (opts.nowrap) return false;
        opts.nextSlide = els.length - 1;
    }
    else if (opts.nextSlide >= els.length) {
        if (opts.nowrap) return false;
        opts.nextSlide = 0;
    }
    if (opts.prevNextClick && typeof opts.prevNextClick == 'function')
        opts.prevNextClick(val > 0, opts.nextSlide, els[opts.nextSlide]);
    go(els, opts, 1, val>=0);
    return false;
};

function buildPager(els, opts) {
    var $p = $(opts.pager);
    $.each(els, function(i,o) {
        var $a = (typeof opts.pagerAnchorBuilder == 'function')
            ? $(opts.pagerAnchorBuilder(i,o))
            : $('<a href="#">'+(i+1)+'</a>');
        // don't reparent if anchor is in the dom
        if ($a.parents('body').length == 0)
            $a.appendTo($p);
        $a.bind('click',function() {
            opts.nextSlide = i;
            var p = els[0].parentNode, timeout = p.cycleTimeout;
            if (timeout) {
                clearTimeout(timeout);
                p.cycleTimeout = 0;
            }            
            if (typeof opts.pagerClick == 'function')
                opts.pagerClick(opts.nextSlide, els[opts.nextSlide]);
            go(els,opts,1,!opts.rev);
            return false;
        });
    });
   $p.find('a').filter('a:eq('+opts.startingSlide+')').addClass('activeSlide');
};

// this fixes clearType problems in ie6 by setting an explicit bg color
function clearTypeFix($slides) {
    function hex(s) {
        var s = parseInt(s).toString(16);
        return s.length < 2 ? '0'+s : s;
    };
    function getBg(e) {
        for ( ; e && e.nodeName.toLowerCase() != 'html'; e = e.parentNode) {
            var v = $.css(e,'background-color');
            if (v.indexOf('rgb') >= 0 ) { 
                var rgb = v.match(/\d+/g); 
                return '#'+ hex(rgb[0]) + hex(rgb[1]) + hex(rgb[2]);
            }
            if (v && v != 'transparent')
                return v;
        }
        return '#ffffff';
    };
    $slides.each(function() { $(this).css('background-color', getBg(this)); });
};


$.fn.cycle.custom = function(curr, next, opts, cb) {
    var $l = $(curr), $n = $(next);
    $n.css(opts.cssBefore);
    var fn = function() {$n.animate(opts.animIn, opts.speedIn, opts.easeIn, cb)};
    $l.animate(opts.animOut, opts.speedOut, opts.easeOut, function() {
        if (opts.cssAfter) $l.css(opts.cssAfter);
        if (!opts.sync) fn();
    });
    if (opts.sync) fn();
};

$.fn.cycle.transitions = {
    fade: function($cont, $slides, opts) {
        $slides.not(':eq('+opts.startingSlide+')').css('opacity',0);
        opts.before.push(function() { $(this).show() });
        opts.animIn    = { opacity: 1 };
        opts.animOut   = { opacity: 0 };
        opts.cssAfter  = { display: 'none' };
    }
};

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

// override these globally if you like (they are all optional)
$.fn.cycle.defaults = {
    fx:           'fade', // one of: fade, shuffle, zoom, slideX, slideY, scrollUp/Down/Left/Right
    timeout:       4000,  // milliseconds between slide transitions (0 to disable auto advance)
    speed:         1000,  // speed of the transition (any valid fx speed value)
    speedIn:       null,  // speed of the 'in' transition
    speedOut:      null,  // speed of the 'out' transition
    click:         null,  // @deprecated; please use the 'next' option
    next:          null,  // id of element to use as click trigger for next slide
    prev:          null,  // id of element to use as click trigger for previous slide
    prevNextClick: null,  // callback fn for prev/next clicks:  function(isNext, zeroBasedSlideIndex, slideElement)
    pager:         null,  // id of element to use as pager container
    pagerClick:    null,  // callback fn for pager clicks:  function(zeroBasedSlideIndex, slideElement)
    pagerAnchorBuilder: null, // callback fn for building anchor links
    before:        null,  // transition callback (scope set to element to be shown)
    after:         null,  // transition callback (scope set to element that was shown)
    easing:        null,  // easing method for both in and out transitions
    easeIn:        null,  // easing for "in" transition
    easeOut:       null,  // easing for "out" transition
    shuffle:       null,  // coords for shuffle animation, ex: { top:15, left: 200 }
    animIn:        null,  // properties that define how the slide animates in
    animOut:       null,  // properties that define how the slide animates out
    cssBefore:     null,  // properties that define the initial state of the slide before transitioning in
    cssAfter:      null,  // properties that defined the state of the slide after transitioning out
    fxFn:          null,  // function used to control the transition
    height:       'auto', // container height
    startingSlide: 0,     // zero-based index of the first slide to be displayed
    sync:          1,     // true if in/out transitions should occur simultaneously
    random:        0,     // true for random, false for sequence (not applicable to shuffle fx)
    fit:           0,     // force slides to fit container
    pause:         0,     // true to enable "pause on hover"
    autostop:      0,     // true to end slideshow after X transitions (where X == slide count)
    delay:         0,     // additional delay (in ms) for first transition (hint: can be negative)
    slideExpr:     null,  // expression for selecting slides (if something other than all children is required)
    cleartype:     0,     // true if clearType corrections should be applied (for IE)
    nowrap:        0      // true to prevent slideshow from wrapping
};

})(jQuery);