/*!
 * jCarousel - Riding carousels with jQuery
 *   http://sorgalla.com/jcarousel/
 *
 * Copyright (c) 2006 Jan Sorgalla (http://sorgalla.com)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) 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) {
        if (typeof o == 'string') {
            var instance = $(this).data('jcarousel'),
                args = Array.prototype.slice.call(arguments, 1);
            return instance[o].apply(instance, args);
        } else
        return this.each(function () {
            $(this).data('jcarousel', new $jc(this, o));
        });
    };
    var defaults = {
        vertical: false,
        start: 1,
        offset: 1,
        size: null,
        scroll: 3,
        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]);
                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 = this.container.find('ul,ol').eq(0);
        }
        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.buttonNext = $('.jcarousel-next', this.container);
        if (this.buttonNext.size() == 0 && this.options.buttonNextHTML != null) this.buttonNext = this.clip.after(this.options.buttonNextHTML).next();
        this.buttonNext.addClass(this.className('jcarousel-next'));
        this.buttonPrev = $('.jcarousel-prev', this.container);
        if (this.buttonPrev.size() == 0 && this.options.buttonPrevHTML != null) this.buttonPrev = this.clip.after(this.options.buttonPrevHTML).next();
        this.buttonPrev.addClass(this.className('jcarousel-prev'));
        this.clip.addClass(this.className('jcarousel-clip')).css({
            overflow: 'hidden',
            position: 'relative'
        });
        this.list.addClass(this.className('jcarousel-list')).css({
            overflow: 'hidden',
            position: 'relative',
            top: 0,
            left: 0,
            margin: 0,
            padding: 0
        });
        this.container.addClass(this.className('jcarousel-container')).css({
            position: 'relative'
        });
        var di = this.options.visible != null ? Math.ceil(this.clipping() / this.options.visible) : null;
        var li = this.list.children('li');
        var self = this;
        if (li.size() > 0) {
            var wh = 0,
                i = this.options.offset;
            li.each(function () {
                self.format(this, i++);
                wh += self.dimension(this, di);
            });
            this.list.css(this.wh, wh + 'px');
            if (!o || o.size === undefined) this.options.size = li.size();
        }
        this.container.css('display', 'block');
        this.buttonNext.css('display', 'block');
        this.buttonPrev.css('display', 'block');
        this.funcNext = function () {
            self.next();
        };
        this.funcPrev = function () {
            self.prev();
        };
        this.funcResize = function () {
            self.reload();
        };
        if (this.options.initCallback != null) this.options.initCallback(this, 'init');
        if ($.browser.safari) {
            this.buttons(false, false);
            $(window).bind('load.jcarousel', function () {
                self.setup();
            });
        } else this.setup();
    };
    var $jc = $.jcarousel;
    $jc.fn = $jc.prototype = {
        jcarousel: '0.2.4'
    };
    $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.jcarousel', this.funcResize).bind('resize.jcarousel', 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) {
            var pos = $jc.intval(this.list.css(this.lt));
            if (this.locked || this.animating) return pos;
            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 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,
                g;
            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);
                    if (this.first != null && this.options.wrap == 'circular' && this.options.size !== null && (j <= 0 || j > this.options.size)) {
                        g = this.get(this.index(j));
                        if (g.length) this.add(j, g.children().clone(true));
                    }
                }
                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);
                    if (this.first != null && this.options.wrap == 'circular' && this.options.size !== null && (j <= 0 || j > this.options.size)) {
                        g = this.get(this.index(j));
                        if (g.length) this.add(j, g.find('>*').clone(true));
                    }
                }
                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 == 'circular' || 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 + '.jcarousel', this.funcNext)[n ? 'removeClass' : 'addClass'](this.className('jcarousel-next-disabled')).attr('disabled', n ? false : true);
            this.buttonPrev[p ? 'bind' : 'unbind'](this.options.buttonPrevEvent + '.jcarousel', 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)).css({
                'float': 'left',
                'list-style': 'none'
            });
            $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);