/*
    This file is part of JonDesign's SmoothGallery v1.2.

    JonDesign's SmoothGallery 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.

    JonDesign's SmoothGallery 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.

    You should have received a copy of the GNU General Public License
    along with JonDesign's SmoothGallery; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Main Developer: Jonathan Schemoul (JonDesign: http://www.jondesign.net/)
    Contributed code by:
    - Christian Ehret (bugfix)
    - Nitrix (bugfix)
    - Valerio from Mad4Milk for his great help with the carousel scrolling and many other things.
    - Archie Cowan for helping me find a bugfix on carousel inner width problem.
    Many thanks to:
    - The mootools team for the great mootools lib, and it's help and support throughout the project.
*/


// declaring the class
var gallery = new Moo.Class({
    initialize: function(element, options) {
        this.setOptions({
            showArrows: true,
            showCarousel: true,
            showInfopane: true,
            thumbHeight: 75,
            thumbWidth: 100,
            thumbSpacing: 10,
            embedLinks: true,
            fadeDuration: 500,
            delay: 9000,
            preloader: true,
            /* Data retrieval */
            manualData: [],
            populateFrom: false,
            populateData: true,
            destroyAfterPopulate: true,
            elementSelector: "div.imageElement",
            titleSelector: "h3",
            subtitleSelector: "p",
            linkSelector: "a.open",
            imageSelector: "img.full",
            thumbnailSelector: "img.thumbnail",
            defaultTransition: "fade",
            /* InfoPane options */
            slideInfoZoneOpacity: 0.9,
            slideInfoZoneSlide: false,
            /* Carousel options */
            carouselMinimizedOpacity: 0.9,
            carouselMinimizedHeight: 30,
            carouselMaximizedOpacity: 0.9,
            textShowCarousel: '',
            showCarouselLabel: true,
            useThumbGenerator: false,
            thumbGenerator: 'resizer.php',
            useExternalCarousel: false,
            carouselElement: false,
            activateCarouselScroller: true,
            /* CSS Classes */
            baseClass: 'jdGallery',
            withArrowsClass: 'withArrows',
            /* Plugins: HistoryManager */
            useHistoryManager: false,
            customHistoryKey: false
        }, options);
        this.fireEvent('onInit');
        this.currentIter = 0;
        this.lastIter = 0;
        this.maxIter = 0;
        this.galleryElement = element;
        this.galleryData = this.options.manualData;
        this.galleryInit = 1;
        this.galleryElements = Array();
        this.thumbnailElements = Array();
        this.galleryElement.addClass(this.options.baseClass);

        this.populateFrom = element;
        if (this.options.populateFrom)
            this.populateFrom = this.options.populateFrom;
        if (this.options.populateData)
            this.populateData();
        element.style.display="block";

        if (this.options.useHistoryManager)
            this.initHistory();

        if (this.options.embedLinks)
        {
            this.currentLink = new Moo.Element('a').addClass('open').setProperties({
                href: '#',
                title: ''
            }).injectInside(element);
            if ((!this.options.showArrows) && (!this.options.showCarousel))
                this.galleryElement = element = this.currentLink;
            else
                this.currentLink.setStyle('display', 'none');
        }

        this.constructElements();
        if ((this.galleryData.length>1)&&(this.options.showArrows))
        {
            var leftArrow = new Moo.Element('a').addClass('left').addEvent(
                'click',
                this.prevItem.bind(this)
            ).injectInside(element);
            var rightArrow = new Moo.Element('a').addClass('right').addEvent(
                'click',
                this.nextItem.bind(this)
            ).injectInside(element);
            this.galleryElement.addClass(this.options.withArrowsClass);
        }
        this.loadingElement = new Moo.Element('div').addClass('loadingElement').injectInside(element);
        if (this.options.showInfopane) this.initInfoSlideshow();
        if (this.options.showCarousel) this.initCarousel();
        this.doSlideShow(1);
    },
    populateData: function() {
        currentArrayPlace = this.galleryData.length;
        options = this.options;
        var data = this.galleryData;
        this.populateFrom.getElements(options.elementSelector).each(function(el) {
            elementDict = {
                image: el.getElement(options.imageSelector).getProperty('src'),
                number: currentArrayPlace
            };
            if ((options.showInfopane) | (options.showCarousel))
                Object.extend(elementDict, {
                    title: el.getElement(options.titleSelector).innerHTML,
                    description: el.getElement(options.subtitleSelector).innerHTML
                });
            if (options.embedLinks)
                Object.extend(elementDict, {
                    link: el.getElement(options.linkSelector).href||false,
                    linkTitle: el.getElement(options.linkSelector).title
                });
            if ((!options.useThumbGenerator) && (options.showCarousel))
                Object.extend(elementDict, {
                    thumbnail: el.getElement(options.thumbnailSelector).src
                });
            else if (options.useThumbGenerator)
                Object.extend(elementDict, {
                    thumbnail: options.thumbGenerator + '?imgfile=' + elementDict.image + '&max_width=' + options.thumbWidth + '&max_height=' + options.thumbHeight
                });

            data[currentArrayPlace] = elementDict;
            currentArrayPlace++;
            if (this.options.destroyAfterPopulate)
                el.remove();
        });
        this.galleryData = data;
        this.fireEvent('onPopulated');
    },
    constructElements: function() {
        el = this.galleryElement;
        this.maxIter = this.galleryData.length;
        var currentImg;
        for(i=0;i<this.galleryData.length;i++)
        {
            var currentImg = new Moo.Fx.Style(
                new Moo.Element('div').addClass('slideElement').setStyles({
                    'position':'absolute',
                    'left':'0px',
                    'right':'0px',
                    'margin':'0px',
                    'padding':'0px',
                    'backgroundImage':"url('" + this.galleryData[i].image + "')",
                    'backgroundPosition':"center center",
                    'opacity':'0'
                }).injectInside(el),
                'opacity',
                {duration: this.options.fadeDuration}
            );
            this.galleryElements[parseInt(i)] = currentImg;
        }
    },
    destroySlideShow: function(element) {
        var myClassName = element.className;
        var newElement = new Moo.Element('div').addClass('myClassName');
        element.parentNode.replaceChild(newElement, element);
    },
    startSlideShow: function() {
        this.fireEvent('onStart');
        this.loadingElement.style.display = "none";
        this.lastIter = this.maxIter - 1;
        this.currentIter = 0;
        this.galleryInit = 0;
        this.galleryElements[parseInt(this.currentIter)].set(1);
        if (this.options.showInfopane)
            this.showInfoSlideShow.delay(1000, this);
        this.prepareTimer();
        if (this.options.embedLinks)
            this.makeLink(this.currentIter);
    },
    nextItem: function() {
        this.fireEvent('onNextCalled');
        this.nextIter = this.currentIter+1;
        if (this.nextIter >= this.maxIter)
            this.nextIter = 0;
        this.galleryInit = 0;
        this.goTo(this.nextIter);
    },
    prevItem: function() {
        this.fireEvent('onPreviousCalled');
        this.nextIter = this.currentIter-1;
        if (this.nextIter <= -1)
            this.nextIter = this.maxIter - 1;
        this.galleryInit = 0;
        this.goTo(this.nextIter);
    },
    goTo: function(num) {
        this.clearTimer();
        if (this.options.embedLinks)
            this.clearLink();
        if (this.options.showInfopane)
        {
            this.slideInfoZone.clearChain();
            this.hideInfoSlideShow().chain(this.changeItem.pass(num, this));
        } else
            this.changeItem.delay(500, this, num);
        if (this.options.embedLinks)
            this.makeLink(num);
        this.prepareTimer();
        /*if (this.options.showCarousel)
            this.clearThumbnailsHighlights();*/
    },
    changeItem: function(num) {
        this.fireEvent('onStartChanging');
        this.galleryInit = 0;
        if (this.currentIter != num)
        {
            for(i=0;i<this.maxIter;i++)
            {
                if ((i != this.currentIter)) this.galleryElements[i].set(0);
            }
            if (num > this.currentIter) this.galleryElements[num].custom(1);
            else
            {
                this.galleryElements[num].set(1);
                this.galleryElements[this.currentIter].custom(0);
            }
            this.currentIter = num;
        }
        this.doSlideShow.bind(this)();
        this.fireEvent('onChanged');
    },
    clearTimer: function() {
        if (this.options.timed)
            Moo.$clear(this.timer);
    },
    prepareTimer: function() {
        if (this.options.timed)
            this.timer = this.nextItem.delay(this.options.delay, this);
    },
    doSlideShow: function(position) {
        if (this.galleryInit == 1)
        {
            imgPreloader = new Image();
            imgPreloader.onload=function(){
                this.startSlideShow.delay(10, this);
            }.bind(this);
            imgPreloader.src = this.galleryData[0].image;
        } else {
            if (this.options.showInfopane)
            {
                if (this.options.showInfopane)
                {
                    this.showInfoSlideShow.delay((500 + this.options.fadeDuration), this);
                } else
                    if ((this.options.showCarousel)&&(this.options.activateCarouselScroller))
                        this.centerCarouselOn(position);
            }
        }
    },
    initCarousel: function () {
        var carouselElement;
        if (!this.options.useExternalCarousel)
        {
            var carouselContainerElement = new Moo.Element('div').addClass('carouselContainer').injectInside(this.galleryElement);
            this.carouselContainer = new Moo.Fx.Styles(carouselContainerElement, {transition: Moo.Fx.Transitions.expoOut});
            this.carouselContainer.normalHeight = carouselContainerElement.offsetHeight;
            this.carouselContainer.set({'opacity': this.options.carouselMinimizedOpacity, 'top': (this.options.carouselMinimizedHeight - this.carouselContainer.normalHeight)});
            this.carouselBtn = new Moo.Element('a').addClass('carouselBtn').setProperties({
                title: this.options.textShowCarousel
            }).setHTML(this.options.textShowCarousel).injectInside(carouselContainerElement);

            this.carouselBtn.addEvent(
                'click',
                function () {
                    this.carouselContainer.clearTimer();
                    this.toggleCarousel();
                }.bind(this)
            );
            this.carouselActive = false;

            carouselElement = new Moo.Element('div').addClass('carousel').injectInside(carouselContainerElement);
            this.carousel = new Moo.Fx.Styles(carouselElement);
        } else {
            carouselElement = this.options.carouselElement.addClass('jdExtCarousel');
        }
        if (this.options.showCarouselLabel)
            this.carouselLabel = new Moo.Element('p').addClass('label').injectInside(carouselElement);
        this.carouselWrapper = new Moo.Element('div').addClass('carouselWrapper').injectInside(carouselElement);
        this.carouselInner = new Moo.Element('div').addClass('carouselInner').injectInside(this.carouselWrapper);
        if (this.options.activateCarouselScroller)
        {
            this.carouselWrapper.scroller = new Moo.Scroller(this.carouselWrapper, {
                area: 100,
                velocity: 0.2
            })

            this.carouselWrapper.elementScroller = new Moo.Fx.Scroll(this.carouselWrapper, {
                duration: 400,
                onStart: this.carouselWrapper.scroller.stop.bind(this.carouselWrapper.scroller),
                onComplete: this.carouselWrapper.scroller.start.bind(this.carouselWrapper.scroller)
            });
        }
        this.constructThumbnails();

        this.carouselInner.style.width = ((this.maxIter * (this.options.thumbWidth + this.options.thumbSpacing + 2))+this.options.thumbSpacing) + "px";
    },
    toggleCarousel: function() {
        if (this.carouselActive)
            this.hideCarousel();
        else
            this.showCarousel();
    },
    showCarousel: function () {
        this.fireEvent('onShowCarousel');
        this.carouselContainer.custom({
            'opacity': this.options.carouselMaximizedOpacity,
            'top': 0
        }).addEvent('onComplete', function() { this.carouselActive = true; this.carouselWrapper.scroller.start(); }.bind(this));
    },
    hideCarousel: function () {
        this.fireEvent('onHideCarousel');
        this.carouselContainer.custom({
            'opacity': this.options.carouselMinimizedOpacity,
            'top': (this.options.carouselMinimizedHeight - this.carouselContainer.normalHeight)
        }).addEvent('onComplete', function() { this.carouselActive = false; this.carouselWrapper.scroller.stop(); }.bind(this));
    },
    constructThumbnails: function () {
        element = this.carouselInner;
        for(i=0;i<this.galleryData.length;i++)
        {
            var currentImg = new Moo.Fx.Style(new Moo.Element ('div').addClass("thumbnail").setStyles({
                    backgroundImage: "url('" + this.galleryData[i].thumbnail + "')",
                    backgroundPosition: "center center",
                    backgroundRepeat: 'no-repeat',
                    marginLeft: this.options.thumbSpacing + "px",
                    width: this.options.thumbWidth + "px",
                    height: this.options.thumbHeight + "px"
                }).injectInside(element), "opacity", {duration: 200}).set(0.8);
            currentImg.element.addEvents({
                'mouseover': function (myself) {
                    myself.clearTimer();
                    myself.custom(1);
                    if (this.options.showCarouselLabel)
                        Moo.$(this.carouselLabel).setHTML('<span class="number">' + (myself.relatedImage.number + 1) + "/" + this.maxIter + ":</span> " + myself.relatedImage.title);
                }.pass(currentImg, this),
                'mouseout': function (myself) {
                    myself.clearTimer();
                    myself.custom(0.8);
                }.pass(currentImg, this),
                'click': function (myself) {
                    this.goTo(myself.relatedImage.number);
                }.pass(currentImg, this)
            });

            currentImg.relatedImage = this.galleryData[i];
            this.thumbnailElements[parseInt(i)] = currentImg;
        }
    },
    clearThumbnailsHighlights: function()
    {
        for(i=0;i<this.galleryData.length;i++)
        {
            this.thumbnailElements[i].clearTimer();
            this.thumbnailElements[i].custom(0.8);
        }
    },
    centerCarouselOn: function(num) {
        var carouselElement = this.thumbnailElements[num];
        var position = carouselElement.element.offsetLeft + (carouselElement.element.offsetWidth / 2);
        var carouselWidth = this.carouselWrapper.offsetWidth;
        var carouselInnerWidth = this.carouselInner.offsetWidth;
        var diffWidth = carouselWidth / 2;
        var scrollPos = position-diffWidth;
        this.carouselWrapper.elementScroller.scrollTo(scrollPos,0);
    },
    initInfoSlideshow: function() {
        /*if (this.slideInfoZone.element)
            this.slideInfoZone.element.remove();*/
        this.slideInfoZone = new Moo.Fx.Styles(new Moo.Element('div').addClass('slideInfoZone').injectInside(Moo.$(this.galleryElement))).set({'opacity':0});
        var slideInfoZoneTitle = new Moo.Element('h2').injectInside(this.slideInfoZone.element);
        var slideInfoZoneDescription = new Moo.Element('p').injectInside(this.slideInfoZone.element);
        this.slideInfoZone.normalHeight = this.slideInfoZone.element.offsetHeight;
        this.slideInfoZone.element.setStyle('opacity',0);
    },
    changeInfoSlideShow: function()
    {
        this.hideInfoSlideShow.delay(10, this);
        this.showInfoSlideShow.delay(500, this);
    },
    showInfoSlideShow: function() {
        this.fireEvent('onShowInfopane');
        this.slideInfoZone.clearTimer();
        element = this.slideInfoZone.element;
        element.getElement('h2').setHTML(this.galleryData[this.currentIter].title);
        element.getElement('p').setHTML(this.galleryData[this.currentIter].description);
        if(this.options.slideInfoZoneSlide)
            this.slideInfoZone.custom({'opacity': [0, this.options.slideInfoZoneOpacity], 'height': [0, this.slideInfoZone.normalHeight]});
        else
            this.slideInfoZone.custom({'opacity': [0, this.options.slideInfoZoneOpacity]});
        if (this.options.showCarousel)
            this.slideInfoZone.chain(this.centerCarouselOn.pass(this.currentIter, this));
        return this.slideInfoZone;
    },
    hideInfoSlideShow: function() {
        this.fireEvent('onHideInfopane');
        this.slideInfoZone.clearTimer();
        if(this.options.slideInfoZoneSlide)
            this.slideInfoZone.custom({'opacity': 0, 'height': 0});
        else
            this.slideInfoZone.custom({'opacity': 0});
        return this.slideInfoZone;
    },
    makeLink: function(num) {
        this.currentLink.setProperties({
            href: this.galleryData[num].link,
            title: this.galleryData[num].linkTitle
        })
        if (!((this.options.embedLinks) && (!this.options.showArrows) && (!this.options.showCarousel)))
            this.currentLink.setStyle('display', 'block');
    },
    clearLink: function() {
        this.currentLink.setProperties({href: '', title: ''});
        if (!((this.options.embedLinks) && (!this.options.showArrows) && (!this.options.showCarousel)))
            this.currentLink.setStyle('display', 'none');
    },
    /* Plugins: HistoryManager */
    initHistory: function() {
        this.historyKey = this.galleryElement.id + '-picture';
        if (this.options.customHistoryKey)
            this.historyKey = this.options.customHistoryKey();
        this.history = HistoryManager.register(
            this.historyKey,
            [1],
            function(values) {
                if (parseInt(values[0])-1 < this.maxIter)
                    this.goTo(parseInt(values[0])-1);
            }.bind(this),
            function(values) {
                return [this.historyKey, '(', values[0], ')'].join('');
            }.bind(this),
            this.historyKey + '\\((\\d+)\\)');
        this.addEvent('onChanged', function(){
            this.history.setValue(0, this.currentIter+1);
        }.bind(this));
    }
});
gallery.implement(new Moo.Events);
gallery.implement(new Moo.Options);

/* All code copyright 2006 Jonathan Schemoul */