/**
 * jCarousel - Riding carousels with jQuery
 *   http://sorgalla.com/jcarousel/
 *
 * Copyright (c) 2006 Jan Sorgalla (http://sorgalla.com)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * Built on top of the jQuery library
 *   http://jquery.com
 *
 * Inspired by the "Carousel Component" by Bill Scott
 *   http://billwscott.com/carousel/
 */

(function($)
    {
    $.fn.jcarousel = function(o)
        {
        return this.each(function()
            {
            new $jc(this, o)
            } )
        } ;

    var defaults = { vertical: false,              start: 1,                      offset: 1,
                     size: null,                   scroll: 1,                     visible: null,
                     animation: 'normal',          easing: 'swing',               auto: 0,
                     wrap: null,                   initCallback: null,            reloadCallback: null,
                     itemLoadCallback: null,       itemFirstInCallback: null,     itemFirstOutCallback: null,
                     itemLastInCallback: null,     itemLastOutCallback: null,     itemVisibleInCallback: null,
                     itemVisibleOutCallback: null, buttonNextHTML: '<div></div>', buttonPrevHTML: '<div></div>',
                     buttonNextEvent: 'click',     buttonPrevEvent: 'click',      buttonNextCallback: null,
                     buttonPrevCallback: null };
    $.jcarousel = function(e, o)
        {
        this.options = $.extend({ }, defaults, o || { });
        this.locked = false;
        this.container = null;
        this.clip = null;
        this.list = null;
        this.buttonNext = null;
        this.buttonPrev = null;
        this.wh = !this.options.vertical ? 'width' : 'height';
        this.lt = !this.options.vertical ? 'left' : 'top';
        var skin = '', split = e.className.split(' ');

        for (var i = 0; i < split.length; i++)
            {
            if (split[i].indexOf('jcarousel-skin') != -1)
                {
                $(e).removeClass(split[i]);
                var skin = split[i];
                break
                }
            }

        if (e.nodeName == 'UL' || e.nodeName == 'OL')
            {
            this.list = $(e);
            this.container = this.list.parent();

            if (this.container.hasClass('jcarousel-clip'))
                {
                if (!this.container.parent().hasClass('jcarousel-container'))
                    this.container = this.container.wrap('<div></div>');

                this.container = this.container.parent()
                }

            else if (!this.container.hasClass('jcarousel-container'))
                this.container = this.list.wrap('<div></div>').parent()
            }

        else
            {
            this.container = $(e);
            this.list = $(e).find('>ul,>ol,div>ul,div>ol')
            }

        if (skin != '' && this.container.parent()[0].className.indexOf('jcarousel-skin') == -1)
            this.container.wrap('<div class=" '+skin+'"></div>');

        this.clip = this.list.parent();

        if (!this.clip.length || !this.clip.hasClass('jcarousel-clip'))
            this.clip = this.list.wrap('<div></div>').parent();

        this.buttonPrev = $('.jcarousel-prev', this.container);

        if (this.buttonPrev.size() == 0 && this.options.buttonPrevHTML != null)
            this.buttonPrev = this.clip.before(this.options.buttonPrevHTML).prev();

        this.buttonPrev.addClass(this.className('jcarousel-prev'));
        this.buttonNext = $('.jcarousel-next', this.container);

        if (this.buttonNext.size() == 0 && this.options.buttonNextHTML != null)
            this.buttonNext = this.clip.before(this.options.buttonNextHTML).prev();

        this.buttonNext.addClass(this.className('jcarousel-next'));
        this.clip.addClass(this.className('jcarousel-clip'));
        this.list.addClass(this.className('jcarousel-list'));
        this.container.addClass(this.className('jcarousel-container'));
        var di = this.options.visible != null ? Math.ceil(this.clipping() / this.options.visible) : null;
        var li = this.list.children('li');
        var self = this;

        if (li.size() > 0)
            {
            var wh = 0, i = this.options.offset;
            li.each(function()
                {
                self.format(this, i++);
                wh += self.dimension(this, di)
                });

            this.list.css(this.wh, wh + 'px');

            if (!o || o.size === undefined)
                this.options.size = li.size()
            }

        this.container.css('display', 'block');
        this.buttonNext.css('display', 'block');
        this.buttonPrev.css('display', 'block');
        this.funcNext = function()
            {
            self.next()
            } ;

        this.funcPrev = function()
            {
            self.prev()
            } ;

        this.funcResize = function()
            {
            self.prev()
            } ;

        if (this.options.initCallback != null)
            this.options.initCallback(this, 'init');

        if ($.browser.safari)
            {
            this.buttons(false, false);
            $(window).bind('load', function()
                {
                self.setup()
                } )
            }

        else
            this.setup()
        };

    var $jc = $.jcarousel;
    $jc.fn = $jc.prototype = { jcarousel: '0.2.3' };
    $jc.fn.extend = $jc.extend = $.extend;
    $jc.fn.extend({ setup: function()
        {
        this.first = null;
        this.last = null;
        this.prevFirst = null;
        this.prevLast = null;
        this.animating = false;
        this.timer = null;
        this.tail = null;
        this.inTail = false;

        if (this.locked)
            return;

        this.list.css(this.lt, this.pos(this.options.offset) + 'px');
        var p = this.pos(this.options.start);
        this.prevFirst = this.prevLast = null;
        this.animate(p, false);
        $(window).unbind('resize', this.funcResize).bind('resize', this.funcResize)
        },          reset: function()
        {
        this.list.empty();
        this.list.css(this.lt, '0px');
        this.list.css(this.wh, '10px');

        if (this.options.initCallback != null)
            this.options.initCallback(this, 'reset');

        this.setup()
        },          reload: function()
        {
        if (this.tail != null && this.inTail)
            this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) + this.tail);

        this.tail = null;
        this.inTail = false;

        if (this.options.reloadCallback != null)
            this.options.reloadCallback(this);

        if (this.options.visible != null)
            {
            var self = this;
            var di = Math.ceil(this.clipping() / this.options.visible), wh = 0, lt = 0;
            $('li', this.list).each(function(i)
                {
                wh += self.dimension(this, di);

                if (i + 1 < self.first)
                    lt = wh
                });

            this.list.css(this.wh, wh + 'px');
            this.list.css(this.lt, -lt + 'px')
            }

        this.scroll(this.first, false)
        },          lock: function()
        {
        this.locked = true;
        this.buttons()
        },          unlock: function()
        {
        this.locked = false;
        this.buttons()
        },          size: function(s)
        {
        if (s != undefined)
            {
            this.options.size = s;

            if (!this.locked)
                this.buttons()
            }

        return this.options.size
        },          has: function(i, i2)
        {
        if (i2 == undefined || !i2)
            i2 = i;

        if (this.options.size !== null && i2 > this.options.size)
            i2 = this.options.size;

        for (var j = i; j <= i2; j++)
            {
            var e = this.get(j);

            if (!e.length || e.hasClass('jcarousel-item-placeholder'))
                return false
            }

        return true
        },          get: function(i)
        {
        return $('.jcarousel-item-' + i, this.list)
        } ,         add: function(i, s)
        {
        var e = this.get(i), old = 0, add = 0;

        if (e.length == 0)
            {
            var c, e = this.create(i), j = $jc.intval(i);

            while (c = this.get(--j))
                {
                if (j <= 0 || c.length)
                    {
                    j <= 0 ? this.list.prepend(e) : c.after(e);
                    break
                    }
                }
            }

        else
            old = this.dimension(e);

        e.removeClass(this.className('jcarousel-item-placeholder'));
        typeof s == 'string' ? e.html(s) : e.empty().append(s);
        var di = this.options.visible != null ? Math.ceil(this.clipping() / this.options.visible) : null;
        var wh = this.dimension(e, di) - old;

        if (i > 0 && i < this.first)
            this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) - wh + 'px');

        this.list.css(this.wh, $jc.intval(this.list.css(this.wh)) + wh + 'px');
        return e
        },          remove: function(i)
        {
        var e = this.get(i);

        if (!e.length || (i >= this.first && i <= this.last))
            return;

        var d = this.dimension(e);

        if (i < this.first)
            this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) + d + 'px');

        e.remove();
        this.list.css(this.wh, $jc.intval(this.list.css(this.wh)) - d + 'px')
        },          next: function()
        {
        this.stopAuto();

        if (this.tail != null && !this.inTail)
            this.scrollTail(false);

        else
            this.scroll(((this.options.wrap == 'both' || this.options.wrap == 'last') && this.options.size != null && this.last == this.options.size) ? 1 : this.first + this.options.scroll)
        },          prev: function()
        {
        this.stopAuto();

        if (this.tail != null && this.inTail)
            this.scrollTail(true);

        else
            this.scroll(((this.options.wrap == 'both' || this.options.wrap == 'first') && this.options.size != null && this.first == 1) ? this.options.size : this.first - this.options.scroll)
        },          scrollTail: function(b)
        {
        if (this.locked || this.animating || !this.tail)
            return;

        var pos = $jc.intval(this.list.css(this.lt));
        !b ? pos -= this.tail : pos += this.tail;
        this.inTail = !b;
        this.prevFirst = this.first;
        this.prevLast = this.last;
        this.animate(pos)
        },          scroll: function(i, a)
        {
        if (this.locked || this.animating)
            return;

        this.animate(this.pos(i), a)
        },          pos: function(i)
        {
        if (this.locked || this.animating)
            return;

        if (this.options.wrap != 'circular')
            i = i < 1 ? 1 : (this.options.size && i > this.options.size ? this.options.size : i);

        var back = this.first > i;
        var pos = $jc.intval(this.list.css(this.lt));
        var f = this.options.wrap != 'circular' && this.first <= 1 ? 1 : this.first;
        var c = back ? this.get(f) : this.get(this.last);
        var j = back ? f : f - 1;
        var e = null, l = 0, p = false, d = 0;

        while (back ? --j >= i : ++j < i)
            {
            e = this.get(j);
            p = !e.length;

            if (e.length == 0)
                {
                e = this.create(j).addClass(this.className('jcarousel-item-placeholder'));
                c[back ? 'before' : 'after'](e)
                }

            c = e;
            d = this.dimension(e);

            if (p)
                l += d;

            if (this.first != null && (this.options.wrap == 'circular' || (j >= 1 && (this.options.size == null || j <= this.options.size))))
                pos = back ? pos + d : pos - d
            }

        var clipping = this.clipping();
        var cache = [];
        var visible = 0, j = i, v = 0;
        var c = this.get(i - 1);

        while (++visible)
            {
            e = this.get(j);
            p = !e.length;

            if (e.length == 0)
                {
                e = this.create(j).addClass(this.className('jcarousel-item-placeholder'));
                c.length == 0 ? this.list.prepend(e) : c[back ? 'before' : 'after'](e)
                }

            c = e;
            var d = this.dimension(e);

            if (d == 0)
                {
                alert('jCarousel: No width/height set for items. This will cause an infinite loop. Aborting...');
                return 0
                }

            if (this.options.wrap != 'circular' && this.options.size !== null && j > this.options.size)
                cache.push(e);

            else if (p)
                l += d;

            v += d;

            if (v >= clipping)
                break;

            j++
            }

        for (var x = 0; x < cache.length; x++)
            cache[x].remove();

        if (l > 0)
            {
            this.list.css(this.wh, this.dimension(this.list) + l + 'px');

            if (back)
                {
                pos -= l;
                this.list.css(this.lt, $jc.intval(this.list.css(this.lt)) - l + 'px')
                }
            }

        var last = i + visible - 1;

        if (this.options.wrap != 'circular' && this.options.size && last > this.options.size)
            last = this.options.size;

        if (j > last)
            {
            visible = 0, j = last, v = 0;

            while (++visible)
                {
                var e = this.get(j--);

                if (!e.length)
                    break;

                v += this.dimension(e);

                if (v >= clipping)
                    break
                }
            }

        var first = last - visible + 1;

        if (this.options.wrap != 'circular' && first < 1)
            first = 1;

        if (this.inTail && back)
            {
            pos += this.tail;
            this.inTail = false
            }

        this.tail = null;

        if (this.options.wrap != 'circular' && last == this.options.size && (last - visible + 1) >= 1)
            {
            var m = $jc.margin(this.get(last), !this.options.vertical ? 'marginRight' : 'marginBottom');

            if ((v - m) > clipping)
                this.tail = v - clipping - m
            }

        while (i-- > first)
            pos += this.dimension(this.get(i));

        this.prevFirst = this.first;
        this.prevLast = this.last;
        this.first = first;
        this.last = last;
        return pos
        },          animate: function(p, a)
        {
        if (this.locked || this.animating)
            return;

        this.animating = true;
        var self = this;
        var scrolled = function()
            {
            self.animating = false;

            if (p == 0)
                self.list.css(self.lt, 0);

            if (self.options.wrap == 'both' || self.options.wrap == 'last' || self.options.size == null || self.last < self.options.size)
                self.startAuto();

            self.buttons();
            self.notify('onAfterAnimation')
            };

        this.notify('onBeforeAnimation');

        if (!this.options.animation || a == false)
            {
            this.list.css(this.lt, p + 'px');
            scrolled()
            }

        else
            {
            var o = !this.options.vertical ? { 'left': p } : { 'top': p };
            this.list.animate(o, this.options.animation, this.options.easing, scrolled)
            }
        },          startAuto: function(s)
        {
        if (s != undefined)
            this.options.auto = s;

        if (this.options.auto == 0)
            return this.stopAuto();

        if (this.timer != null)
            return;

        var self = this;
        this.timer = setTimeout(function()
            {
            self.next()
            } , this.options.auto * 1000)
        },          stopAuto: function()
        {
        if (this.timer == null)
            return;

        clearTimeout(this.timer);
        this.timer = null
        },          buttons: function(n, p)
        {
        if (n == undefined || n == null)
            {
            var n = !this.locked && this.options.size !== 0 && ((this.options.wrap && this.options.wrap != 'first') || this.options.size == null || this.last < this.options.size);

            if (!this.locked && (!this.options.wrap || this.options.wrap == 'first') && this.options.size != null && this.last >= this.options.size)
                n = this.tail != null && !this.inTail
            }

        if (p == undefined || p == null)
            {
            var p = !this.locked && this.options.size !== 0 && ((this.options.wrap && this.options.wrap != 'last') || this.first > 1);

            if (!this.locked && (!this.options.wrap || this.options.wrap == 'last') && this.options.size != null && this.first == 1)
                p = this.tail != null && this.inTail
            }

        var self = this;
        this.buttonNext[n ? 'bind' : 'unbind'](this.options.buttonNextEvent, this.funcNext)[n ? 'removeClass' : 'addClass'](this.className('jcarousel-next-disabled')).attr('disabled', n ? false : true);
        this.buttonPrev[p ? 'bind' : 'unbind'](this.options.buttonPrevEvent, this.funcPrev)[p ? 'removeClass' : 'addClass'](this.className('jcarousel-prev-disabled')).attr('disabled', p ? false : true);

        if (this.buttonNext.length > 0 && (this.buttonNext[0].jcarouselstate == undefined || this.buttonNext[0].jcarouselstate != n) && this.options.buttonNextCallback != null)
            {
            this.buttonNext.each(function()
                {
                self.options.buttonNextCallback(self, this, n)
                } );

            this.buttonNext[0].jcarouselstate = n
            }

        if (this.buttonPrev.length > 0 && (this.buttonPrev[0].jcarouselstate == undefined || this.buttonPrev[0].jcarouselstate != p) && this.options.buttonPrevCallback != null)
            {
            this.buttonPrev.each(function()
                {
                self.options.buttonPrevCallback(self, this, p)
                } );

            this.buttonPrev[0].jcarouselstate = p
            }
        },          notify: function(evt)
        {
        var state = this.prevFirst == null ? 'init' : (this.prevFirst < this.first ? 'next' : 'prev');
        this.callback('itemLoadCallback', evt, state);

        if (this.prevFirst !== this.first)
            {
            this.callback('itemFirstInCallback', evt, state, this.first);
            this.callback('itemFirstOutCallback', evt, state, this.prevFirst)
            }

        if (this.prevLast !== this.last)
            {
            this.callback('itemLastInCallback', evt, state, this.last);
            this.callback('itemLastOutCallback', evt, state, this.prevLast)
            }

        this.callback('itemVisibleInCallback', evt, state, this.first, this.last, this.prevFirst, this.prevLast);
        this.callback('itemVisibleOutCallback', evt, state, this.prevFirst, this.prevLast, this.first, this.last)
        },          callback: function(cb, evt, state, i1, i2, i3, i4)
        {
        if (this.options[cb] == undefined || ( typeof this.options[cb] != 'object' && evt != 'onAfterAnimation'))
            return;

        var callback = typeof this.options[cb] == 'object' ? this.options[cb][evt] : this.options[cb];

        if (!$.isFunction(callback))
            return;

        var self = this;

        if (i1 === undefined)
            callback(self, state, evt);

        else if (i2 === undefined)
            this.get(i1).each(function()
                {
                callback(self, this, i1, state, evt)
                } );

        else
            {
            for (var i = i1; i <= i2; i++)
                if (i !== null && !(i >= i3 && i <= i4))
                    this.get(i).each(function()
                        {
                        callback(self, this, i, state, evt)
                        } )
            }
        },          create: function(i)
        {
        return this.format('<li></li>', i)
        } ,         format: function(e, i)
        {
        var $e = $(e).addClass(this.className('jcarousel-item')).addClass(this.className('jcarousel-item-' + i));
        $e.attr('jcarouselindex', i);
        return $e
        },          className: function(c)
        {
        return c + ' ' + c + (!this.options.vertical ? '-horizontal' : '-vertical')
        } ,         dimension: function(e, d)
        {
        var el = e.jquery != undefined ? e[0] : e;
        var old = !this.options.vertical ? el.offsetWidth + $jc.margin(el, 'marginLeft') + $jc.margin(el, 'marginRight') : el.offsetHeight + $jc.margin(el, 'marginTop') + $jc.margin(el, 'marginBottom');

        if (d == undefined || old == d)
            return old;

        var w = !this.options.vertical ? d - $jc.margin(el, 'marginLeft') - $jc.margin(el, 'marginRight') : d - $jc.margin(el, 'marginTop') - $jc.margin(el, 'marginBottom');
        $(el).css(this.wh, w + 'px');
        return this.dimension(el)
        },          clipping: function()
        {
        return !this.options.vertical ? this.clip[0].offsetWidth - $jc.intval(this.clip.css('borderLeftWidth')) - $jc.intval(this.clip.css('borderRightWidth')) : this.clip[0].offsetHeight - $jc.intval(this.clip.css('borderTopWidth')) - $jc.intval(this.clip.css('borderBottomWidth'))
        } ,         index: function(i, s)
        {
        if (s == undefined)
            s = this.options.size;

        return Math.round((((i - 1) / s) - Math.floor((i - 1) / s)) * s) + 1
        }});

    $jc.extend({ defaults: function(d)
        {
        return $.extend(defaults, d || { })
        } ,      margin: function(e, p)
        {
        if (!e)
            return 0;

        var el = e.jquery != undefined ? e[0] : e;

        if (p == 'marginRight' && $.browser.safari)
            {
            var old = { 'display': 'block', 'float': 'none', 'width': 'auto' }, oWidth, oWidth2;
            $.swap(el, old, function()
                {
                oWidth = el.offsetWidth
                } );

            old['marginRight'] = 0;
            $.swap(el, old, function()
                {
                oWidth2 = el.offsetWidth
                } );

            return oWidth2 - oWidth
            }

        return $jc.intval($.css(el, p))
        },       intval: function(v)
        {
        v = parseInt(v);
        return isNaN(v) ? 0 : v
        }})
    })(jQuery);