/*

Galleria — A JavaScript image gallery for the fastidious
Copyright (C) 2010  Aino

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

*/

(function () {

    var initializing = false,
    fnTest = /xyz/.test(function () { xyz; }) ? /\b__super\b/ : /.*/,
    Class = function () { },
    Err = function (msg) {
        if (G.debug) {
            throw Error(msg);
        }
    },
    window = this;

    Class.extend = function (prop) {
        var __super = this.prototype;
        initializing = true;
        var proto = new this();
        initializing = false;
        for (var name in prop) {
            if (name) {
                proto[name] = typeof prop[name] == "function" &&
                typeof __super[name] == "function" && fnTest.test(prop[name]) ?
                (function (name, fn) {
                    return function () {
                        var tmp = this.__super;
                        this.__super = __super[name];
                        var ret = fn.apply(this, arguments);
                        this.__super = tmp;
                        return ret;
                    };
                })(name, prop[name]) : prop[name];
            }
        }

        function Class() {
            if (!initializing && this.__constructor) {
                this.__constructor.apply(this, arguments);
            }
        }
        Class.prototype = proto;
        Class.constructor = Class;
        Class.extend = arguments.callee;
        return Class;
    };

    var Base = Class.extend({
        loop: function (elem, fn) {
            var scope = this;
            if (typeof elem == 'number') {
                elem = new Array(elem);
            }
            jQuery.each(elem, function () {
                fn.call(scope, arguments[1], arguments[0]);
            });
            return elem;
        },
        create: function (elem, className) {
            elem = elem || 'div';
            var el = document.createElement(elem);
            if (className) {
                el.className = className;
            }
            return el;
        },
        getElements: function (selector) {
            var elems = {};
            this.loop(jQuery(selector), this.proxy(function (elem) {
                this.push(elem, elems);
            }));
            return elems;
        },
        setStyle: function (elem, css) {
            jQuery(elem).css(css);
            return this;
        },
        cssText: function (string) {
            var style = document.createElement('style');
            this.getElements('head')[0].appendChild(style);
            if (style.styleSheet) { // IE
                style.styleSheet.cssText = string;
            } else {
                var cssText = document.createTextNode(string);
                style.appendChild(cssText);
            }
            return this;
        },
        cssFile: function (src) {
            var link = document.createElement('link');
            link.media = 'all';
            link.rel = 'stylesheet';
            link.href = src;
            this.getElements('head')[0].appendChild(link);
        },
        moveOut: function (elem) {
            return this.setStyle(elem, {
                position: 'absolute',
                left: '-10000px'
            });
        },
        moveIn: function (elem) {
            return this.setStyle(elem, {
                left: '0'
            });
        },
        reveal: function (elem) {
            return jQuery(elem).show();
        },
        hide: function (elem) {
            return jQuery(elem).hide();
        },
        mix: function (obj, ext) {
            return jQuery.extend(obj, ext);
        },
        proxy: function (fn, scope) {
            if (typeof fn !== 'function') {
                return function () { };
            }
            scope = scope || this;
            return function () {
                return fn.apply(scope, Array.prototype.slice.call(arguments));
            };
        },
        listen: function (elem, type, fn) {
            jQuery(elem).bind(type, fn);
        },
        forget: function (elem, type) {
            jQuery(elem).unbind(type);
        },
        dispatch: function (elem, type) {
            jQuery(elem).trigger(type);
        },
        clone: function (elem, keepEvents) {
            keepEvents = keepEvents || false;
            return jQuery(elem).clone(keepEvents)[0];
        },
        removeAttr: function (elem, attributes) {
            this.loop(attributes.split(' '), function (attr) {
                jQuery(elem).removeAttr(attr);
            });
        },
        push: function (elem, obj) {
            if (typeof obj.length == 'undefined') {
                obj.length = 0;
            }
            Array.prototype.push.call(obj, elem);
            return elem;
        },
        width: function (elem, outer) {
            return this.meassure(elem, outer, 'Width');
        },
        height: function (elem, outer) {
            return this.meassure(elem, outer, 'Height');
        },
        meassure: function (el, outer, meassure) {
            var elem = jQuery(el);
            var ret = outer ? elem['outer' + meassure](true) : elem[meassure.toLowerCase()]();
            // fix quirks mode
            if (G.QUIRK) {
                var which = meassure == "Width" ? ["left", "right"] : ["top", "bottom"];
                this.loop(which, function (s) {
                    ret += elem.css('border-' + s + '-width').replace(/[^\d]/g, '') * 1;
                    ret += elem.css('padding-' + s).replace(/[^\d]/g, '') * 1;
                });
            }
            return ret;
        },
        toggleClass: function (elem, className, arg) {
            if (typeof arg !== 'undefined') {
                var fn = arg ? 'addClass' : 'removeClass';
                jQuery(elem)[fn](className);
                return this;
            }
            jQuery(elem).toggleClass(className);
            return this;
        },
        hideAll: function (el) {
            jQuery(el).find('*').hide();
        },
        animate: function (el, options) {
            var elem = jQuery(el);
            if (!elem.length) {
                return;
            }
            if (options.from) {
                elem.css(from);
            }
            elem.animate(options.to, {
                duration: options.duration || 400,
                complete: options.complete || function () { }
            });
        },
        wait: function (fn, callback, err, max) {
            fn = this.proxy(fn);
            callback = this.proxy(callback);
            err = this.proxy(err);
            var ts = new Date().getTime() + (max || 3000);
            window.setTimeout(function () {
                if (fn()) {
                    callback();
                    return false;
                }
                if (new Date().getTime() >= ts) {
                    err();
                    callback();
                    return false;
                }
                window.setTimeout(arguments.callee, 1);
            }, 1);
            return this;
        },
        getScript: function (url, callback) {
            var head = document.getElementsByTagName("head")[0];
            var script = document.createElement("script");
            script.src = url;
            callback = this.proxy(callback);

            // Handle Script loading
            {
                var done = false;

                // Attach handlers for all browsers
                script.onload = script.onreadystatechange = function () {
                    if (!done && (!this.readyState ||
                   this.readyState == "loaded" || this.readyState == "complete")) {
                        done = true;
                        callback();

                        // Handle memory leak in IE
                        script.onload = script.onreadystatechange = null;
                    }
                };
            }
            head.appendChild(script);
            return this;
        }
    });

    var Picture = Base.extend({
        __constructor: function (order) {
            this.image = null;
            this.elem = this.create('div', 'galleria-image');
            this.setStyle(this.elem, {
                overflow: 'hidden',
                position: 'relative' // for IE Standards mode
            });
            this.order = order;
            this.orig = { w: 0, h: 0, r: 1 };
        },

        cache: {},

        add: function (src) {
            if (this.cache[src]) {
                return this.cache[src];
            }
            var image = new Image();
            image.src = src;
            this.setStyle(image, { display: 'block' });
            if (image.complete && image.width) {
                this.cache[src] = image;
                return image;
            }
            image.onload = (function (scope) {
                return function () {
                    scope.cache[src] = image;
                };
            })(this);
            return image;
        },

        isCached: function (src) {
            return this.cache[src] ? this.cache[src].complete : false;
        },

        make: function (src) {
            var i = this.cache[src] || this.add(src);
            return this.clone(i);
        },

        load: function (src, callback) {
            callback = this.proxy(callback);
            this.elem.innerHTML = '';
            this.image = this.make(src);
            this.moveOut(this.image);
            this.elem.appendChild(this.image);
            this.wait(function () {
                return (this.image.complete && this.image.width);
            }, function () {
                this.orig = {
                    h: this.image.height,
                    w: this.image.width
                };
                callback({ target: this.image, scope: this });
            }, function () {
                Err('image not loaded in 10 seconds: ' + src)
            }, 10000);
            return this;
        },

        scale: function (w, h, crop, max, margin, complete) {
            margin = margin || 0;
            complete = complete || function () { };
            if (!this.image) {
                return this;
            }
            this.wait(function () {
                width = w || this.width(this.elem);
                height = h || this.height(this.elem);
                return width && height;
            }, function () {
                var ratio = Math[(crop ? 'max' : 'min')](width / this.orig.w, height / this.orig.h);
                if (max) {
                    ratio = Math.min(max, ratio);
                }
                this.setStyle(this.elem, {
                    width: width,
                    height: height
                });
                this.image.width = Math.ceil(this.orig.w * ratio) - margin * 2;
                this.image.height = Math.ceil(this.orig.h * ratio) - margin * 2;
                this.setStyle(this.image, {
                    position: 'relative',
                    top: Math.round(this.image.height * -1 / 2 + (height / 2)) - margin,
                    left: Math.round(this.image.width * -1 / 2 + (width / 2)) - margin
                });
                complete.call(this);
            });
            return this;
        }
    });

    var tID; // the private timeout handler

    var G = window.Galleria = Base.extend({

        __constructor: function (options) {
            if (typeof options.target === 'undefined') {
                Err('No target.');
            }
            this.playing = false;
            this.playtime = 3000;
            this.active = null;
            this.queue = {};
            this.data = {};
            this.dom = {};
            this.controls = {
                active: 0,
                swap: function () {
                    this.active = this.active ? 0 : 1;
                },
                getActive: function () {
                    return this[this.active];
                },
                getNext: function () {
                    return this[Math.abs(this.active - 1)];
                }
            };
            this.thumbnails = {};
            this.options = this.mix({
                preload: 2,
                image_crop: false,
                thumb_crop: true,
                thumb_quality: 'auto',
                image_margin: 0,
                thumb_margin: 0,
                transition: G.transitions.fade,
                transition_speed: 400,
                carousel: true,
                carousel_speed: 200,
                carousel_steps: 'auto',
                carousel_follow: true,
                popup_links: false,
                max_scale_ratio: undefined,
                thumbnails: true,
                data_type: 'auto',
                data_image_selector: 'img',
                data_source: options.target,
                data_config: function (elem) { return {}; },
                queue: true,
                remove_original: true
            }, options);

            this.target = this.dom.target = this.getElements(this.options.target)[0];
            if (!this.target) {
                Err('Target not found.');
            }

            this.stageWidth = 0;
            this.stageHeight = 0;

            var elems = 'container stage images image-nav image-nav-left image-nav-right ' +
                    'info info-link info-text info-title info-description info-author info-close ' +
                    'thumbnails thumbnails-list thumbnails-container thumb-nav-left thumb-nav-right ' +
                    'loader counter';
            elems = elems.split(' ');

            this.loop(elems, function (blueprint) {
                this.dom[blueprint] = this.create('div', 'galleria-' + blueprint);
            });
        },

        bind: function (type, fn) {
            this.listen(this.get('container'), type, this.proxy(fn));
            return this;
        },

        trigger: function (type) {
            type = typeof type == 'object' ?
            this.mix(type, { scope: this }) :
            { type: type, scope: this };
            this.dispatch(this.get('container'), type);
            return this;
        },
        run: function () {

            var o = this.options;
            if (!this.data.length) {
                Err('Data is empty.');
            }
            this.target.innerHTML = '';
            this.loop(2, function () {
                var image = new Picture();
                this.setStyle(image.elem, {
                    position: 'absolute',
                    top: 0,
                    left: 0
                });
                this.setStyle(this.get('images'), {
                    position: 'relative',
                    top: 0,
                    left: 0,
                    width: '100%',
                    height: '100%'
                });
                this.get('images').appendChild(image.elem);
                this.push(image, this.controls);
            }, this);

            for (var i = 0; this.data[i]; i++) {
                var thumb;
                if (o.thumbnails) {
                    thumb = new Picture(i);
                    var src = this.data[i].thumb || this.data[i].image;
                    this.get('thumbnails').appendChild(thumb.elem);
                    thumb.load(src, this.proxy(function (e) {
                        var orig = this.width(e.target);
                        e.scope.scale(null, null, o.thumb_crop, o.max_scale_ratio, o.thumb_margin, this.proxy(function () {
                            // set high quality if downscale is moderate
                            this.toggleQuality(e.target, o.thumb_quality === true || (o.thumb_quality == 'auto' && orig < e.target.width * 3));
                            this.trigger({
                                type: G.THUMBNAIL,
                                thumbTarget: e.target,
                                thumbOrder: e.scope.order
                            });
                        }));
                    }));
                    if (o.preload == 'all') {
                        thumb.add(this.data[i].image);
                    }
                } else {
                    thumb = {
                        elem: this.create('div', 'galleria-image'),
                        image: this.create('span', 'img')
                    };
                    thumb.elem.appendChild(thumb.image);
                    this.get('thumbnails').appendChild(thumb.elem);
                }
                thumb.elem.rel = i;
                this.listen(thumb.elem, 'click', this.proxy(function (e) {
                    var ind = e.currentTarget.rel;
                    if (this.active !== ind) {
                        this.show(ind);
                    }
                }));
                this.push(thumb, this.thumbnails);
            }
            this.build();
            this.target.appendChild(this.get('container'));
            this.wait(function () {
                this.stageWidth = this.width(this.get('stage'));
                this.stageHeight = this.height(this.get('stage'));
                return this.stageHeight && this.stageWidth;
            }, function () {
                var thumbWidth = this.thumbnails[0] ? this.width(this.thumbnails[0].elem, true) : 0;

                var thumbsWidth = thumbWidth * this.thumbnails.length;
                if (thumbsWidth < this.stageWidth) {
                    o.carousel = false;
                }

                if (o.carousel) {
                    this.toggleClass(this.get('thumbnails-container'), 'galleria-carousel');
                    this.carousel = {
                        right: this.get('thumb-nav-right'),
                        left: this.get('thumb-nav-left'),
                        overflow: 0,
                        setOverflow: this.proxy(function (newWidth) {
                            newWidth = newWidth || this.width(this.get('thumbnails-list'));
                            this.carousel.overflow = Math.ceil(((thumbsWidth - newWidth) / thumbWidth) + 1) * -1;
                        }),
                        pos: 0,
                        setClasses: this.proxy(function () {
                            this.toggleClass(this.carousel.left, 'disabled', this.carousel.pos === 0);
                            this.toggleClass(this.carousel.right, 'disabled', this.carousel.pos == this.carousel.overflow + 1);
                        }),
                        animate: this.proxy(function () {
                            this.carousel.setClasses();
                            this.animate(this.get('thumbnails'), {
                                to: { left: thumbWidth * this.carousel.pos },
                                duration: o.carousel_speed
                            });
                        })
                    };
                    this.carousel.setOverflow();

                    this.setStyle(this.get('thumbnails-list'), {
                        overflow: 'hidden',
                        position: 'relative' // for IE Standards mode
                    });
                    this.setStyle(this.get('thumbnails'), {
                        width: thumbsWidth,
                        position: 'relative'
                    });

                    this.proxy(function (c, steps) {
                        steps = (typeof steps == 'string' && steps.toLowerCase() == 'auto') ? this.thumbnails.length + c.overflow : steps;
                        c.setClasses();
                        this.loop(['left', 'right'], this.proxy(function (dir) {
                            this.listen(c[dir], 'click', function (e) {
                                if (c.pos === (dir == 'right' ? c.overflow : 0)) {
                                    return;
                                }
                                c.pos = dir == 'right' ? Math.max(c.overflow + 1, c.pos - steps) : Math.min(0, c.pos + steps);
                                c.animate();
                            });
                        }));
                    })(this.carousel, o.carousel_steps);
                }
                this.listen(this.get('image-nav-right'), 'click', this.proxy(function () {
                    this.next();
                }));
                this.listen(this.get('image-nav-left'), 'click', this.proxy(function () {
                    this.prev();
                }));
                this.trigger(G.READY);
            }, function () {
                Err('Galleria could not load. Make sure stage has a height and width.');
            }, 5000);
        },
        addElement: function () {
            this.loop(arguments, function (b) {
                this.dom[b] = this.create('div', 'galleria-' + b);
            });
            return this;
        },
        getDimensions: function (i) {
            return {
                w: i.width,
                h: i.height,
                cw: this.stageWidth,
                ch: this.stageHeight,
                top: (this.stageHeight - i.height) / 2,
                left: (this.stageWidth - i.width) / 2
            };
        },
        attachKeyboard: function (map) {
            jQuery(document).bind('keydown', { map: map, scope: this }, this.keyNav);
            return this;
        },
        detachKeyboard: function () {
            jQuery(document).unbind('keydown', this.keyNav);
            return this;
        },
        keyNav: function (e) {
            var key = e.keyCode || e.which;
            var map = e.data.map;
            var scope = e.data.scope;
            var keymap = {
                UP: 38,
                DOWN: 40,
                LEFT: 37,
                RIGHT: 39,
                RETURN: 13,
                ESCAPE: 27,
                BACKSPACE: 8
            };
            for (var i in map) {
                var k = i.toUpperCase();
                if (keymap[k]) {
                    map[keymap[k]] = map[i];
                }
            }
            if (typeof map[key] == 'function') {
                map[key].call(scope, e);
            }
        },
        build: function () {
            this.append({
                'info-text':
                ['info-title', 'info-description', 'info-author'],
                'info':
                ['info-link', 'info-text', 'info-close'],
                'image-nav':
                ['image-nav-right', 'image-nav-left'],
                'stage':
                ['images', 'loader', 'counter', 'image-nav'],
                'thumbnails-list':
                ['thumbnails'],
                'thumbnails-container':
                ['thumb-nav-left', 'thumbnails-list', 'thumb-nav-right'],
                'container':
                ['stage', 'thumbnails-container', 'info']
            });
        },

        appendChild: function (parent, child) {
            try {
                this.get(parent).appendChild(this.get(child));
            } catch (e) { }
        },

        append: function (data) {
            for (var i in data) {
                if (data[i].constructor == Array) {
                    for (var j = 0; data[i][j]; j++) {
                        this.appendChild(i, data[i][j]);
                    }
                } else {
                    this.appendChild(i, data[i]);
                }
            }
            return this;
        },

        rescale: function (width, height) {

            var check = this.proxy(function () {
                this.stageWidth = width || this.width(this.get('stage'));
                this.stageHeight = height || this.height(this.get('stage'));
                return this.stageWidth && this.stageHeight;
            });
            if (G.WEBKIT) {
                this.wait(check); // wekit is too fast
            } else {
                check.call(this);
            }
            this.controls.getActive().scale(this.stageWidth, this.stageHeight, this.options.image_crop, this.options.max_scale_ratio, this.options.image_margin);
            if (this.carousel) {
                this.carousel.setOverflow();
            }

        },

        show: function (index, rewind) {
            if (!this.options.queue && this.queue.stalled) {
                return;
            }
            rewind = typeof rewind != 'undefined' ? !!rewind : index < this.active;
            this.active = index;
            this.push([index, rewind], this.queue);
            if (!this.queue.stalled) {
                this.showImage();
            }
            return this;
        },

        showImage: function () {
            var o = this.options;
            var args = this.queue[0];
            var index = args[0];
            var rewind = !!args[1];
            if (o.carousel && this.carousel && o.carousel_follow) {
                this.proxy(function (c) {
                    if (index <= Math.abs(c.pos)) {
                        c.pos = Math.max(0, (index - 1)) * -1;
                        c.animate();
                    } else if (index >= this.thumbnails.length + c.overflow + Math.abs(c.pos)) {
                        c.pos = this.thumbnails.length + c.overflow - index - 1 + (index == this.thumbnails.length - 1 ? 1 : 0);
                        c.animate();
                    }
                })(this.carousel);
            }

            var src = this.getData(index).image;
            var active = this.controls.getActive();
            var next = this.controls.getNext();
            var cached = next.isCached(src);
            if (active.image) {
                this.toggleQuality(active.image, false);
            }
            var complete = this.proxy(function () {
                this.queue.stalled = false;
                this.toggleQuality(next.image, o.image_quality);
                this.setStyle(active.elem, { zIndex: 0 });
                this.setStyle(next.elem, { zIndex: 1 });
                this.moveOut(active.image);
                this.controls.swap();
                if (this.getData(index).link) {
                    this.setStyle(next.image, { cursor: 'pointer' });
                    this.listen(next.image, 'click', this.proxy(function () {
                        if (o.popup_links) {
                            var win = window.open(this.getData(index).link, '_blank');
                        } else {
                            window.location.href = this.getData(index).link;
                        }
                    }));
                }
                Array.prototype.shift.call(this.queue);
                if (this.queue.length) {
                    this.showImage();
                }
                this.playCheck();
            });
            if (typeof o.preload == 'number' && o.preload > 0) {
                var p, n = this.getNext();
                try {
                    for (var i = o.preload; i > 0; i--) {
                        p = new Picture();
                        p.add(this.getData(n).image);
                        n = this.getNext(n);
                    }
                } catch (e) { }
            }
            this.trigger({
                type: G.LOADSTART,
                cached: cached,
                imageTarget: next.image,
                thumbTarget: this.thumbnails[index].image
            });
            next.load(src, this.proxy(function (e) {
                next.scale(this.stageWidth, this.stageHeight, o.image_crop, o.max_scale_ratio, o.image_margin, this.proxy(function (e) {
                    this.toggleQuality(next.image, false);
                    this.trigger({
                        type: G.LOADFINISH,
                        cached: cached,
                        imageTarget: next.image,
                        thumbTarget: this.thumbnails[index].image
                    });
                    this.queue.stalled = true;
                    var transition = G.transitions[o.transition] || o.transition;
                    if (typeof transition == 'function') {
                        transition.call(this, {
                            prev: active.image,
                            next: next.image,
                            rewind: rewind,
                            speed: o.transition_speed || 400
                        }, complete);
                    } else {
                        complete();
                    }
                }));
                this.setInfo(index);
                this.get('counter').innerHTML = '<span class="current">' + (index + 1) +
                '</span> / <span class="total">' + this.thumbnails.length + '</span>';
            }));
        },

        getNext: function (base) {
            base = base || this.active;
            return base == this.data.length - 1 ? 0 : base + 1;
        },

        getPrev: function (base) {
            base = base || this.active;
            return base === 0 ? this.data.length - 1 : base - 1;
        },

        next: function () {
            this.show(this.getNext(), false);
            return this;
        },

        prev: function () {
            this.show(this.getPrev(), true);
            return this;
        },

        get: function (elem) {
            return this.dom[elem] || false;
        },

        getData: function (index) {
            return this.data[index] || this.data[this.active];
        },

        play: function (delay) {
            this.playing = true;
            this.playtime = delay || this.playtime;
            this.playCheck();
            return this;
        },

        pause: function () {
            this.playing = false;
            return this;
        },

        playCheck: function () {
            if (this.playing) {
                window.clearInterval(tID);
                tID = window.setTimeout(this.proxy(function () {
                    if (this.playing) {
                        this.next();
                    }
                }), this.playtime);
            }
        },

        setActive: function (val) {
            this.active = val;
            return this;
        },

        setInfo: function (index) {
            var data = this.getData(index);
            var set = this.proxy(function () {
                this.loop(arguments, function (type) {
                    var elem = this.get('info-' + type);
                    var fn = data[type] && data[type].length ? 'reveal' : 'hide';
                    this[fn](elem);
                    elem.innerHTML = data[type];
                });
            });
            set('title', 'description', 'author');
            return this;
        },

        hasInfo: function (index) {
            var d = this.getData(index);
            var l = d.title + d.description + d.author;
            return !!l.length;
        },

        getDataObject: function (o) {
            var obj = {
                image: '',
                thumb: '',
                title: '',
                description: '',
                author: '',
                link: ''
            };
            return o ? this.mix(obj, o) : obj;
        },

        jQuery: function (str) {
            var ret = [];
            this.loop(str.split(','), this.proxy(function (elem) {
                elem = elem.replace(/^\s\s*/, "").replace(/\s\s*$/, "");
                if (this.get(elem)) {
                    ret.push(elem);
                }
            }));
            var jQ = jQuery(this.get(ret.shift()));
            this.loop(ret, this.proxy(function (elem) {
                jQ = jQ.add(this.get(elem));
            }));
            return jQ;
        },

        $: function (str) {
            return this.jQuery(str);
        },

        toggleQuality: function (img, force) {
            if (!G.IE7 || typeof img == 'undefined' || !img) {
                return this;
            }
            if (typeof force === 'undefined') {
                force = img.style.msInterpolationMode == 'nearest-neighbor';
            }
            img.style.msInterpolationMode = force ? 'bicubic' : 'nearest-neighbor';

            return this;
        },

        load: function () {
            var loaded = 0;
            var o = this.options;
            if (
            (o.data_type == 'auto' &&
                typeof o.data_source == 'object' &&
                !(o.data_source instanceof jQuery) &&
                !o.data_source.tagName
            ) || o.data_type == 'json' || o.data_source.constructor == 'Array') {
                this.data = o.data_source;
                this.trigger(G.DATA);

            } else { // assume selector
                var images = jQuery(o.data_source).find(o.data_image_selector);
                var getData = this.proxy(function (elem) {
                    var i, j, anchor = elem.parentNode;
                    if (anchor && anchor.nodeName == 'A') {
                        if (anchor.href.match(/\.(png|gif|jpg)/)) {
                            i = anchor.href;
                        } else {
                            j = anchor.href;
                        }
                    }
                    var obj = this.getDataObject({
                        title: elem.title,
                        thumb: elem.src,
                        image: i || elem.src,
                        description: elem.alt,
                        link: j || elem.getAttribute('longdesc')
                    });
                    return this.mix(obj, o.data_config(elem));
                });

                this.loop(images, function (elem) {
                    loaded++;
                    this.push(getData(elem), this.data);
                    if (o.remove_original) {
                        elem.parentNode.removeChild(elem);
                    }
                    if (loaded == images.length) {
                        this.trigger(G.DATA);
                    }
                });
            }
        }
    });

    G.log = function () {
        try {
            console.log.apply(console, Array.prototype.slice.call(arguments));
        } catch (e) {
            try {
                opera.postError.apply(opera, arguments);
            } catch (er) {
                alert(Array.prototype.join.call(arguments, " "));
            }
        }
    };

    G.DATA = 'data';
    G.READY = 'ready';
    G.THUMBNAIL = 'thumbnail';
    G.LOADSTART = 'loadstart';
    G.LOADFINISH = 'loadfinish';

    var nav = navigator.userAgent.toLowerCase();

    G.IE7 = (window.XMLHttpRequest && document.expando);
    G.IE6 = (!window.XMLHttpRequest);
    G.IE = !!(G.IE6 || G.IE7);
    G.WEBKIT = /webkit/.test(nav);
    G.SAFARI = /safari/.test(nav);
    G.CHROME = /chrome/.test(nav);
    G.QUIRK = (G.IE && document.compatMode && document.compatMode == "BackCompat");
    G.MAC = /mac/.test(navigator.platform.toLowerCase());

    var tempPath = ''; // we need to save this in a global private variable later
    var tempName = ''; // the last loaded theme
    var tempLoading = false; // we need to manually check if script has loaded
    var tempFile = ''; // the theme file

    G.themes = {
        create: function (obj) {
            var orig = ['name', 'author', 'version', 'defaults', 'init'];
            var proto = G.prototype;
            proto.loop(orig, function (val) {
                if (!obj[val]) {
                    Err(val + ' not specified in theme.');
                }
                if (typeof G.themes[obj.name] == 'undefined') {
                    G.themes[obj.name] = {};
                }
                if (val != 'name' && val != 'init') {
                    G.themes[obj.name][val] = obj[val];
                }
            });
            if (obj.css) {
                if (!tempPath.length) { // try to find the script in the head tag to determine tempPath
                    var theme_src = proto.getElements('script');
                    proto.loop(theme_src, function (el) {
                        var reg = new RegExp('galleria.' + obj.name + '.js');
                        if (reg.test(el.src)) {
                            tempPath = el.src.replace(/[^\/]*$/, "");
                        }
                    });
                }
                obj.cssPath = tempPath + obj.css;
                tempPath = '';
            }
            tempName = obj.name;
            G.themes[obj.name].init = function (o) {
                if (obj.cssPath) {
                    var link = proto.getElements('#galleria-styles');
                    if (link.length) {
                        link = link[0];
                    } else {
                        link = proto.create('link');
                        link.id = 'galleria-styles';
                        link.rel = 'stylesheet';
                        link.media = 'screen';
                        proto.getElements('head')[0].appendChild(link);
                    }
                    link.href = obj.cssPath;
                }
                if (obj.cssText) {
                    proto.cssText(obj.cssText);
                }
                o = proto.mix(G.themes[obj.name].defaults, o);
                var gallery = new G(o);
                gallery.bind(G.DATA, function () {
                    gallery.run();
                });
                gallery.bind(G.READY, function () {
                    obj.init.call(gallery, o);
                    if (typeof o.extend == 'function') {
                        o.extend.call(gallery, o);
                    }
                });
                gallery.load();
                return gallery;
            };
        }
    };
    /*
    G.themes.create({
    name: 'default',
    author: 'Galleria',
    version: '1.0',
    defaults: {},
    cssText: '.galleria-container{height:500px}' +
    '.galleria-stage{height:450px}' + 
    '.galleria-thumbnails .galleria-image{width:50px;height:50px;float:left;cursor:pointer;}',
    init: function(options) {
    this.show(0);
    }
    });
    */

    G.loadTheme = function (src, callback) {
        tempLoading = true;
        tempPath = src.replace(/[^\/]*$/, "");
        tempFile = src;
        Galleria.prototype.getScript(src, function () {
            tempLoading = false;
            if (typeof callback == 'function') {
                callback();
            }
        });
    };

    jQuery.easing.galleria = function (x, t, b, c, d) {
        if ((t /= d / 2) < 1) {
            return c / 2 * t * t * t * t + b;
        }
        return -c / 2 * ((t -= 2) * t * t * t - 2) + b;
    };

    G.transitions = {
        add: function (name, fn) {
            if (name != arguments.callee.name) {
                this[name] = fn;
            }
        },
        fade: function (params, complete) {
            jQuery(params.next).show().css('opacity', 0).animate({
                opacity: 1
            }, params.speed, complete);
            if (params.prev) {
                jQuery(params.prev).css('opacity', 1).animate({
                    opacity: 0
                }, params.speed);
            }
        },
        flash: function (params, complete) {
            jQuery(params.next).css('opacity', 0);
            if (params.prev) {
                jQuery(params.prev).animate({
                    opacity: 0
                }, (params.speed / 2), function () {
                    jQuery(params.next).animate({
                        opacity: 1
                    }, params.speed, complete);
                });
            } else {
                jQuery(params.next).animate({
                    opacity: 1
                }, params.speed, complete);
            }
        },
        slide: function (params, complete) {
            var image = jQuery(params.next).parent();
            var images = this.$('images');
            var width = this.stageWidth;
            image.css({
                left: width * (params.rewind ? -1 : 1)
            });
            images.animate({
                left: width * (params.rewind ? 1 : -1)
            }, {
                duration: params.speed,
                queue: false,
                easing: 'galleria',
                complete: function () {
                    images.css('left', 0);
                    image.css('left', 0);
                    complete();
                }
            });
        },
        fadeslide: function (params, complete) {
            if (params.prev) {
                jQuery(params.prev).css({
                    opacity: 1,
                    left: 0
                }).animate({
                    opacity: 0,
                    left: 50 * (params.rewind ? 1 : -1)
                }, {
                    duration: params.speed,
                    queue: false,
                    easing: 'swing'
                });
            }
            jQuery(params.next).css({
                left: 50 * (params.rewind ? -1 : 1),
                opacity: 0
            }).animate({
                opacity: 1,
                left: 0
            }, {
                duration: params.speed,
                complete: complete,
                queue: false,
                easing: 'swing'
            });
        }
    };

    G.flickr = {
        key: null,
        options: {
            max: 30,
            use_original: false,
            data_config: function () { }
        },
        setOptions: function (o) {
            this.options = Galleria.prototype.mix(this.options, o);
            return this;
        },
        search: function (key, params, callback) {
            this.key = key;
            var obj = {};
            var proto = Galleria.prototype;

            params = proto.mix({
                method: 'flickr.photos.search',
                extras: 'o_dims, url_t, url_m, url_o',
                sort: 'interestingness-desc'
            }, params);

            this.load(key, params, function (data) {
                var photos = data.photos.photo;
                var len = Math.min(this.options.max, photos.length);
                for (var i = 0; i < len; i++) {
                    var item = proto.getDataObject({
                        thumb: photos[i].url_t,
                        image: (photos[i].url_o && this.options.use_original) ? photos[i].url_o : photos[i].url_m,
                        title: photos[i].title
                    });
                    proto.push(proto.mix(item, this.options.data_config(photos[i])), obj);
                }
                callback(obj);
            });
            return this;
        },
        load: function (key, params, callback) {
            var url = 'http://api.flickr.com/services/rest/?';
            var scope = this;
            params = $.extend({
                format: 'json',
                jsoncallback: '?',
                api_key: key || this.key
            }, params);
            jQuery.each(params, function (key, value) {
                url += '&' + key + '=' + value;
            });
            jQuery.getJSON(url, function (data) {
                if (data.stat == 'ok') {
                    callback.call(scope, data);
                } else {
                    Err('Flickr data failed. Check API Key.');
                }
            });
            return this;
        }
    };

    jQuery.fn.galleria = function () {
        var selector = this.selector;
        var a = arguments;
        G.prototype.wait(function () {
            return !tempLoading;
        }, function () {
            var hasTheme = typeof a[0] == 'string';
            var theme = hasTheme ? a[0] : tempName;
            var options = hasTheme ? a[1] || {} : a[0] || {};
            options = G.prototype.mix(options, { target: selector });
            G.debug = !!options.debug;
            if (typeof G.themes[theme] == 'undefined') {
                var err = theme ? 'Theme ' + theme + ' not found.' : 'No theme specified';
                Err(err);
                return null;
            } else {
                return G.themes[theme].init(options);
            }
        }, function () {
            Err('Theme file ' + tempFile + ' not found.');
        });
    };

})();