/*
    This file is part of JonDesign's SmoothGallery v2.0.

    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 3 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.
        - Tomocchino from #mootools for the preloader class
        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 = {
        initialize: function(element, options) {
                this.setOptions({
                        showArrows: true,
                        showCarousel: true,
                        showInfopane: true,
                        embedLinks: true,
                        fadeDuration: 500,
                        timed: false,
                        delay: 9000,
                        preloader: true,
                        preloaderImage: true,
                        preloaderErrorImage: 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: 0.7,
                        slideInfoZoneSlide: true,
                        /* Carousel options */
                        carouselMinimizedOpacity: 0.4,
                        carouselMinimizedHeight: 20,
                        carouselMaximizedOpacity: 0.9,
                        thumbHeight: 75,
                        thumbWidth: 100,
                        thumbSpacing: 10,
                        thumbIdleOpacity: 0.2,
                        textShowCarousel: 'Featured Content',
                        showCarouselLabel: true,
                        thumbCloseCarousel: true,
                        useThumbGenerator: false,
                        thumbGenerator: 'resizer.php',
                        useExternalCarousel: false,
                        carouselElement: false,
                        carouselHorizontal: true,
                        activateCarouselScroller: true,
                        carouselPreloader: true,
                        textPreloadingCarousel: 'Loading...',
                        /* 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 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 Element('a').addClass('left').addEvent(
                                'click',
                                this.prevItem.bind(this)
                        ).injectInside(element);
                        var rightArrow = new Element('a').addClass('right').addEvent(
                                'click',
                                this.nextItem.bind(this)
                        ).injectInside(element);
                        this.galleryElement.addClass(this.options.withArrowsClass);
                }
                this.loadingElement = new 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 = $A(this.galleryData);
                data.extend(this.populateGallery(this.populateFrom, currentArrayPlace));
                this.galleryData = data;
                this.fireEvent('onPopulated');
        },
        populateGallery: function(element, startNumber) {
                var data = [];
                options = this.options;
                currentArrayPlace = startNumber;
                element.getElements(options.elementSelector).each(function(el) {
                        elementDict = {
                                image: el.getElement(options.imageSelector).getProperty('src'),
                                number: currentArrayPlace,
                                transition: this.options.defaultTransition
                        };
                        elementDict.extend = $extend;
                        if ((options.showInfopane) | (options.showCarousel))
                                elementDict.extend({
                                        title: el.getElement(options.titleSelector).innerHTML,
                                        description: el.getElement(options.subtitleSelector).innerHTML
                                });
                        if (options.embedLinks)
                                elementDict.extend({
                                        link: el.getElement(options.linkSelector).href||false,
                                        linkTitle: el.getElement(options.linkSelector).title||false,
                                        linkTarget: el.getElement(options.linkSelector).getProperty('target')||false
                                });
                        if ((!options.useThumbGenerator) && (options.showCarousel))
                                elementDict.extend({
                                        thumbnail: el.getElement(options.thumbnailSelector).getProperty('src')
                                });
                        else if (options.useThumbGenerator)
                                elementDict.extend({
                                        thumbnail: options.thumbGenerator + '?imgfile=' + elementDict.image + '&max_width=' + options.thumbWidth + '&max_height=' + options.thumbHeight
                                });

                        data.extend([elementDict]);
                        currentArrayPlace++;
                        if (this.options.destroyAfterPopulate)
                                el.remove();
                });
                return data;
        },
        constructElements: function() {
                el = this.galleryElement;
                this.maxIter = this.galleryData.length;
                var currentImg;
                for(i=0;i<this.galleryData.length;i++)
                {
                        var currentImg = new Fx.Styles(
                                new Element('div').addClass('slideElement').setStyles({
                                        'position':'absolute',
                                        'left':'0px',
                                        'right':'0px',
                                        'margin':'0px',
                                        'padding':'0px',
                                        'backgroundPosition':"center center",
                                        'opacity':'0'
                                }).injectInside(el),
                                'opacity',
                                {duration: this.options.fadeDuration}
                        );
                        if (this.options.preloader)
                        {
                                currentImg.source = this.galleryData[i].image;
                                currentImg.loaded = false;
                                currentImg.load = function(imageStyle) {
                                        if (!imageStyle.loaded)        {
                                                new Asset.image(imageStyle.source, {
                                            'onload'  : function(img){
                                                                                                        img.element.setStyle(
                                                                                                        'backgroundImage',
                                                                                                        "url('" + img.source + "')")
                                                                                                        img.loaded = true;
                                                                                                }.bind(this, imageStyle)
                                                });
                                        }
                                }.pass(currentImg, this);
                        } else {
                                currentImg.element.setStyle('backgroundImage',
                                                                        "url('" + this.galleryData[i].image + "')");
                        }
                        this.galleryElements[parseInt(i)] = currentImg;
                }
        },
        destroySlideShow: function(element) {
                var myClassName = element.className;
                var newElement = new 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({opacity: 1});
                if (this.options.showInfopane)
                        this.showInfoSlideShow.delay(1000, this);
                var textShowCarousel = formatString(this.options.textShowCarousel, this.currentIter+1, this.maxIter);
                if (this.options.showCarousel&&(!this.options.carouselPreloader))
                        this.carouselBtn.setHTML(textShowCarousel).setProperty('title', textShowCarousel);
                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.preloader)
                {
                        this.galleryElements[num].load();
                        if (num==0)
                                this.galleryElements[this.maxIter - 1].load();
                        else
                                this.galleryElements[num - 1].load();
                        if (num==(this.maxIter - 1))
                                this.galleryElements[0].load();
                        else
                                this.galleryElements[num + 1].load();

                }
                if (this.options.embedLinks)
                        this.clearLink();
                if (this.options.showInfopane)
                {
                        this.slideInfoZone.clearChain();
                        this.hideInfoSlideShow().chain(this.changeItem.pass(num, this));
                } else
                        this.currentChangeDelay = 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({opacity: 0});
                        }
                        gallery.Transitions[this.galleryData[num].transition].pass([
                                this.galleryElements[this.currentIter],
                                this.galleryElements[num],
                                this.currentIter,
                                num], this)();
                        this.currentIter = num;
                }
                var textShowCarousel = formatString(this.options.textShowCarousel, num+1, this.maxIter);
                if (this.options.showCarousel)
                        this.carouselBtn.setHTML(textShowCarousel).setProperty('title', textShowCarousel);
                this.doSlideShow.bind(this)();
                this.fireEvent('onChanged');
        },
        clearTimer: function() {
                if (this.options.timed)
                        $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;
                        if(this.options.preloader)
                                this.galleryElements[0].load();
                } 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);
                        }
                }
        },
        createCarousel: function() {
                var carouselElement;
                if (!this.options.useExternalCarousel)
                {
                        var carouselContainerElement = new Element('div').addClass('carouselContainer').injectInside(this.galleryElement);
                        this.carouselContainer = new Fx.Styles(carouselContainerElement, {transition: 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 Element('a').addClass('carouselBtn').setProperties({
                                title: this.options.textShowCarousel
                        }).injectInside(carouselContainerElement);
                        if(this.options.carouselPreloader)
                                this.carouselBtn.setHTML(this.options.textPreloadingCarousel);
                        else
                                this.carouselBtn.setHTML(this.options.textShowCarousel);
                        this.carouselBtn.addEvent(
                                'click',
                                function () {
                                        this.carouselContainer.clearTimer();
                                        this.toggleCarousel();
                                }.bind(this)
                        );
                        this.carouselActive = false;

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

                        this.carouselWrapper.elementScroller = new Fx.Scroll(carouselWrapper, {
                                duration: 400,
                                onStart: this.carouselWrapper.scroller.stop.bind(this.carouselWrapper.scroller),
                                onComplete: this.carouselWrapper.scroller.start.bind(this.carouselWrapper.scroller)
                        });
                }
        },
        fillCarousel: function() {
                this.constructThumbnails();
                this.carouselInner.normalWidth = ((this.maxIter * (this.options.thumbWidth + this.options.thumbSpacing + 2))+this.options.thumbSpacing) + "px";
                this.carouselInner.style.width = this.carouselInner.normalWidth;
        },
        initCarousel: function () {
                this.createCarousel();
                this.fillCarousel();
                if (this.options.carouselPreloader)
                        this.preloadThumbnails();
        },
        flushCarousel: function() {
                this.thumbnailElements.each(function(myFx) {
                        myFx.element.remove();
                        myFx = myFx.element = null;
                });
                this.thumbnailElements = [];
        },
        toggleCarousel: function() {
                if (this.carouselActive)
                        this.hideCarousel();
                else
                        this.showCarousel();
        },
        showCarousel: function () {
                this.fireEvent('onShowCarousel');
                this.carouselContainer.start({
                        'opacity': this.options.carouselMaximizedOpacity,
                        'top': 0
                }).chain(function() {
                        this.carouselActive = true;
                        this.carouselWrapper.scroller.start();
                        this.fireEvent('onCarouselShown');
                        this.carouselContainer.options.onComplete = null;
                }.bind(this));
        },
        hideCarousel: function () {
                this.fireEvent('onHideCarousel');
                var targetTop = this.options.carouselMinimizedHeight - this.carouselContainer.normalHeight;
                this.carouselContainer.start({
                        'opacity': this.options.carouselMinimizedOpacity,
                        'top': targetTop
                }).chain(function() {
                        this.carouselActive = false;
                        this.carouselWrapper.scroller.stop();
                        this.fireEvent('onCarouselHidden');
                        this.carouselContainer.options.onComplete = null;
                }.bind(this));
        },
        constructThumbnails: function () {
                element = this.carouselInner;
                for(i=0;i<this.galleryData.length;i++)
                {
                        var currentImg = new Fx.Style(new 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(this.options.thumbIdleOpacity);
                        currentImg.element.addEvents({
                                'mouseover': function (myself) {
                                        myself.clearTimer();
                                        myself.start(0.99);
                                        if (this.options.showCarouselLabel)
                                                $(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.start(this.options.thumbIdleOpacity);
                                }.pass(currentImg, this),
                                'click': function (myself) {
                                        this.goTo(myself.relatedImage.number);
                                        if (this.options.thumbCloseCarousel)
                                                this.hideCarousel();
                                }.pass(currentImg, this)
                        });

                        currentImg.relatedImage = this.galleryData[i];
                        this.thumbnailElements[parseInt(i)] = currentImg;
                }
        },
        log: function(value) {
                if(console.log)
                        console.log(value);
        },
        preloadThumbnails: function() {
                var thumbnails = [];
                for(i=0;i<this.galleryData.length;i++)
                {
                        thumbnails[parseInt(i)] = this.galleryData[i].thumbnail;
                }
                this.thumbnailPreloader = new Preloader();
                this.thumbnailPreloader.addEvent('onComplete', function() {
                        var textShowCarousel = formatString(this.options.textShowCarousel, this.currentIter+1, this.maxIter);
                        this.carouselBtn.setHTML(textShowCarousel).setProperty('title', textShowCarousel);
                }.bind(this));
                this.thumbnailPreloader.load(thumbnails);
        },
        clearThumbnailsHighlights: function()
        {
                for(i=0;i<this.galleryData.length;i++)
                {
                        this.thumbnailElements[i].clearTimer();
                        this.thumbnailElements[i].start(0.2);
                }
        },
        changeThumbnailsSize: function(width, height)
        {
                for(i=0;i<this.galleryData.length;i++)
                {
                        this.thumbnailElements[i].clearTimer();
                        this.thumbnailElements[i].element.setStyles({
                                'width': width + "px",
                                'height': height + "px"
                        });
                }
        },
        centerCarouselOn: function(num) {
                if (!this.carouselWallMode)
                {
                        var carouselElement = this.thumbnailElements[num];
                        var position = carouselElement.element.offsetLeft + (carouselElement.element.offsetWidth / 2);
                        var carouselWidth = this.carouselWrapper.element.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 Fx.Styles(new Element('div').addClass('slideInfoZone').injectInside($(this.galleryElement))).set({'opacity':0});
                var slideInfoZoneTitle = new Element('h2').injectInside(this.slideInfoZone.element);
                var slideInfoZoneDescription = new 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.start({'opacity': [0, this.options.slideInfoZoneOpacity], 'height': [0, this.slideInfoZone.normalHeight]});
                else
                        this.slideInfoZone.start({'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.start({'opacity': 0, 'height': 0});
                else
                        this.slideInfoZone.start({'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');
        },
        /* To change the gallery data, those two functions : */
        flushGallery: function() {
                this.galleryElements.each(function(myFx) {
                        myFx.element.remove();
                        myFx = myFx.element = null;
                });
                this.galleryElements = [];
        },
        changeData: function(data) {
                this.galleryData = data;
                this.clearTimer();
                this.flushGallery();
                if (this.options.showCarousel) this.flushCarousel();
                this.constructElements();
                if (this.options.showCarousel) this.fillCarousel();
                if (this.options.showInfopane) this.hideInfoSlideShow();
                this.galleryInit=1;
                this.lastIter=0;
                this.currentIter=0;
                this.doSlideShow(1);
        },
        /* Plugins: HistoryManager */
        initHistory: function() {
                this.fireEvent('onHistoryInit');
                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));
                this.fireEvent('onHistoryInited');
        }
};
gallery = new Class(gallery);
gallery.implement(new Events);
gallery.implement(new Options);

gallery.Transitions = new Abstract ({
        fade: function(oldFx, newFx, oldPos, newPos){
                oldFx.options.transition = newFx.options.transition = Fx.Transitions.linear;
                oldFx.options.duration = newFx.options.duration = this.options.fadeDuration;
                if (newPos > oldPos) newFx.start({opacity: 1});
                else
                {
                        newFx.set({opacity: 1});
                        oldFx.start({opacity: 0});
                }
        },
        crossfade: function(oldFx, newFx, oldPos, newPos){
                oldFx.options.transition = newFx.options.transition = Fx.Transitions.linear;
                oldFx.options.duration = newFx.options.duration = this.options.fadeDuration;
                newFx.start({opacity: 1});
                oldFx.start({opacity: 0});
        },
        fadebg: function(oldFx, newFx, oldPos, newPos){
                oldFx.options.transition = newFx.options.transition = Fx.Transitions.linear;
                oldFx.options.duration = newFx.options.duration = this.options.fadeDuration / 2;
                oldFx.start({opacity: 0}).chain(newFx.start.pass([{opacity: 1}], newFx));
        }
});

/* All code copyright 2007 Jonathan Schemoul */

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Follows: Preloader (class)
 * Simple class for preloading images with support for progress reporting
 * Copyright 2007 Tomocchino.
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

var Preloader = new Class({

  Implements: [Events, Options],

  options: {
    root        : '',
    period      : 100
  },

  initialize: function(options){
    this.setOptions(options);
  },

  load: function(sources) {
    this.index = 0;
    this.images = [];
    this.sources = this.temps = sources;
    this.total = this. sources.length;

    this.fireEvent('onStart', [this.index, this.total]);
    this.timer = this.progress.periodical(this.options.period, this);

    this.sources.each(function(source, index){
      this.images[index] = new Asset.image(this.options.root + source, {
        'onload'  : function(){ this.index++; if(this.images[index]) this.fireEvent('onLoad', [this.images[index], index, source]); }.bind(this),
        'onerror' : function(){ this.index++; this.fireEvent('onError', [this.images.splice(index, 1), index, source]); }.bind(this),
        'onabort' : function(){ this.index++; this.fireEvent('onError', [this.images.splice(index, 1), index, source]); }.bind(this)
      });
    }, this);
  },

  progress: function() {
    this.fireEvent('onProgress', [Math.min(this.index, this.total), this.total]);
    if(this.index >= this.total) this.complete();
  },

  complete: function(){
    $clear(this.timer);
    this.fireEvent('onComplete', [this.images]);
  },

  cancel: function(){
    $clear(this.timer);
  }

});

Preloader.implement(new Events, new Options);

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Follows: formatString (function)
 * Original name: Yahoo.Tools.printf
 * Copyright Yahoo.
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

function formatString() {
        var num = arguments.length;
        var oStr = arguments[0];
        for (var i = 1; i < num; i++) {
                var pattern = "\\{" + (i-1) + "\\}";
                var re = new RegExp(pattern, "g");
                oStr = oStr.replace(re, arguments[i]);
        }
        return oStr;
}