/**
 * @Name         Theme Joomla Power Slide Diplay Module
 * @URL          http://powerslide.themejoomla.com
 * @version      $Id: tj.gallery.js 3 skashi $
 * @package      Joomla (1.5.x)
 * @subpackage   Power Slide Diplay Module
 * @copyright    Copyright (C) 2008-2020 Theme Joomla. All rights reserved. E & OE
 * @Script       tj_gallery.js, GNU General Public License
 * @credit       script by Gavin Li-Hunt based on JonDesign's SmoothGallery v2.0. (http://smoothgallery.jondesign.net)
 */

// 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: false,
      preloaderImage: true,
      preloaderErrorImage: true,
      /* Data retrieval */
      manualData: [],
      populateFrom: false,
      populateData: true,
      destroyAfterPopulate: true,
      elementSelector: "div.imageElement",
      titleSelector: "h3",
      subtitleSelector: "div",
      linkSelector: "a.open",
      imageSelector: "img.full",
      thumbnailSelector: "img.thumbnail",
      defaultTransition: "fade",
      /* InfoPane options */
      slideInfoZoneOpacity: 1.0,
      slideInfoZoneSlide: true,
      /* Carousel options */
      carouselMinimizedOpacity: 0.4,
      carouselMinimizedHeight: 20,
      carouselMaximizedOpacity: 0.9,
      thumbHeight: 75,
      thumbWidth: 100,
      thumbSpacing: 10,
      thumbIdleOpacity: 0.7,
      textShowCarousel: 'Pictures',
      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,
      showReadMore: true,
      defaultImage: 0,
      imageLinkOption: 1,
      newTargetWindow: false
    }, options);
    this.fireEvent('onInit');
    this.currentIter = 0;
    this.lastIter = 0;
    this.maxIter = 0;
    this.galleryElement = element;
    this.topElement = 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();

    this.constructElements();

    if (this.options.embedLinks) {
      if( this.options.imageLinkOption == 1 ) {
        this.currentLink = new Element('a').addClass('open').setProperties({
          href: '#',
          title: '',
          rel: 'lightbox[powerslidegallery]'
        }).addEvent(
          'click',
          this.clearTimer.bind(this)
        ).injectInside(element);
     } else {
       this.currentLink = new Element('a').addClass('open').setProperties({
          href: '#',
          title: '',
          rel: 'lightbox[powerslidegallery]'
        }).injectInside(element);
     }
     if ((!this.options.showArrows) && (!this.options.showCarousel))
        this.galleryElement = element = this.currentLink;
     else
        this.currentLink.setStyle('display', 'none');
    }

    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}
      );
   this.galleryElements[parseInt(i)] = currentImg;
    }
    this.preloadImage(0);
  },
  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 = "block";
    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(0, 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.preloadImage(this.nextIter-1);
    this.preloadImage(this.nextIter);
    this.preloadImage(this.nextIter+1);

    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.preloadImage(this.nextIter-1);
    this.preloadImage(this.nextIter);
    this.preloadImage(this.nextIter+1);

    this.goTo(this.nextIter);
  },
  preloadImage : function(num, mustReturn) {
    if(!this.galleryElements[num]) return;
    var e = this.galleryElements[num].element;
    if(!e.style.backgroundImage && !this.options.fitImage) {
      e.style.backgroundImage = "url('" + this.galleryData[num].image + "')";
    }
  },
  goTo: function(num) {
    this.clearTimer();
    myImage = new Image();
    this.preloadImage(num-1);
    this.preloadImage(num);
    this.preloadImage(num+1);
    myImage.onload = function() { dummy = 1; };
    myImage.src = this.galleryData[this.currentIter].image;
    this.testItemChange(num, myImage);
  },
  testItemChange: function(num,image) {
    if( image.complete ) {
       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();
    } else {
      this.prepareTimer();
    }
  },
  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((0), 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();
    carouselWidth = (parseInt(this.maxIter) * (parseInt(this.options.thumbWidth) + parseInt(this.options.thumbSpacing) + 2))+parseInt(this.options.thumbSpacing);
    this.carouselInner.normalWidth = carouselWidth + "px";
    this.carouselInner.style.width = this.carouselInner.normalWidth;
  },
  initCarousel: function () {
    carouselWidth = (parseInt(this.maxIter) * (parseInt(this.options.thumbWidth) + parseInt(this.options.thumbSpacing) + 2))+parseInt(this.options.thumbSpacing);
    this.createCarousel();
    this.fillCarousel();
    if (this.options.carouselPreloader)
      this.preloadThumbnails();
      this.carouselInner.normalWidth = carouselWidth + "px";
    this.carouselInner.style.width = this.carouselInner.normalWidth;
  },
  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('div').injectInside(this.slideInfoZone.element);
    this.slideInfoZone.normalHeight = this.slideInfoZone.element.offsetHeight;
    this.slideInfoZone.element.setStyle('opacity',0);
  },
  changeInfoSlideShow: function()
  {
    this.hideInfoSlideShow.delay(0, this);
    this.showInfoSlideShow.delay(0, this);
  },
  showInfoSlideShow: function() {
    this.fireEvent('onShowInfopane');
    this.slideInfoZone.clearTimer();
    element = this.slideInfoZone.element;
    if(this.galleryData[this.currentIter].link && this.options.showReadMore)
      read_more = '<span class="read_more">&nbsp;&nbsp;<a href="'+this.galleryData[this.currentIter].link+'">read more</a></span>';
    else
      read_more = '';
    element.getElement('h2').setHTML(this.galleryData[this.currentIter].title+read_more);
    element.getElement('div').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) {
    if(this.galleryData[num].lbLink)
      link = this.galleryData[num].lbLink;
    else if(this.galleryData[num].link)
      link = this.galleryData[num].link;
    else
      link = '#';
    if( this.options.newTargetWindow ) {
      this.currentLink.setProperties({
        href: link,
        title: this.galleryData[num].title,
        target: '_blank'
      })
    } else {
      this.currentLink.setProperties({
        href: link,
        title: this.galleryData[num].title
      })
   }
    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;
}