/*
    This file is part of JonDesign's SmoothGallery v1.0.1.

    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.
*/


var $removeEvents = function (object, type)
{
   if (!object.events) return object;
   if (type){
      if (!object.events[type]) return object;
      for (var fn in object.events[type]) object.removeEvent(type, fn);
      object.events[type] = null;
   } else {
      for (var evType in object.events) object.removeEvents(evType);
      object.events = null;
   }
   return object;
};
      
      
// declaring the class
var gallery = new Class({
   options: {
      showArrows: true,
      showCarousel: true,
      showInfopane: true,
      thumbHeight: 75,
      thumbWidth: 100,
      thumbSpacing: 10,
      embedLinks: true,
      fadeDuration: 500,
      timed: false,
      delay: 9000,
      preloader: true,
      manualData: [],
      populateData: true,
      elementSelector: "div.imageElement",
      titleSelector: "h3",
      subtitleSelector: "p",
      linkSelector: "a.open",
      imageSelector: "img.full",
      thumbnailSelector: "img.thumbnail",
      slideInfoZoneOpacity: 0.7,
      carouselMinimizedOpacity: 0.4,
      carouselMinimizedHeight: 20,
      carouselMaximizedOpacity: 0.7, 
      destroyAfterPopulate: true,
      baseClass: 'jdGallery',
      withArrowsClass: 'withArrows',
      textShowCarousel: 'Pictures',
      useThumbGenerator: false,
      thumbGenerator: 'resizer.php'
   },
   
   initialize: function(element, options) {
      this.setOptions(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);
      if (this.options.populateData)
         this.populateData();
      element.style.display="block";
      
      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 ((data.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;
      data = this.galleryData;
      this.galleryElement.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||false
            });
         if ((!options.useThumbGenerator) && (options.showCarousel))
            Object.extend(elementDict, {
               thumbnail: el.getElement(options.thumbnailSelector).src
            });
         else if (options.useThumbGenerator)
            Object.extend(elementDict, {
               thumbnail: 'resizer.php?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 Fx.Style(
            new 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 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].start(1);
         else
         {
            this.galleryElements[num].set(1);
            this.galleryElements[this.currentIter].start(0);
         }
         this.currentIter = num;
      }
      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;
      } else {
         if (this.options.showInfopane)
         {
            if (this.options.showInfopane)
            {
               this.showInfoSlideShow.delay((500 + this.options.fadeDuration), this);
            } else
               if (this.options.showCarousel)
                  this.centerCarouselOn(position);
         }
      }
   },
   initCarousel: function () {
      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
      }).setHTML(this.options.textShowCarousel).injectInside(carouselContainerElement);
      
      this.carouselBtn.addEvent(
         'click',
         function () {
            this.carouselContainer.clearTimer();
            this.toggleCarousel();
         }.bind(this)
      );
      this.carouselActive = false;

      var carouselElement = new Element('div').addClass('carousel').injectInside(carouselContainerElement);
      this.carousel = new Fx.Styles(carouselElement);
      
      this.carouselLabel = new Element('p').addClass('label').injectInside(this.carousel.element);
      this.carouselWrapper = new Element('div').addClass('carouselWrapper').injectInside(this.carousel.element);
      this.carouselInner = new Element('div').addClass('carouselInner').injectInside(this.carouselWrapper);

      this.carouselWrapper.scroller = new Scroller(this.carouselWrapper, {
         area: 100,
         velocity: 0.2
      })
      
      this.carouselWrapper.elementScroller = new 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)) - this.options.thumbSpacing + this.options.thumbWidth) + "px";
   },
   toggleCarousel: function() {
      if (this.carouselActive)
         this.hideCarousel();
      else
         this.showCarousel();
   },
   showCarousel: function () {
      this.fireEvent('onShowCarousel');
      this.carouselContainer.start({
         '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.start({
         '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 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(0.2);
         currentImg.element.addEvents({
            'mouseover': function (myself) {
               myself.clearTimer();
               myself.start(0.99);
               $(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(0.2);
            }.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].start(0.2);
      }
   },
   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 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.stop();
      element = this.slideInfoZone.element;
      element.getElement('h2').setHTML(this.galleryData[this.currentIter].title);
      element.getElement('p').setHTML(this.galleryData[this.currentIter].description);
      this.slideInfoZone.start({'opacity': [0, this.options.slideInfoZoneOpacity], 'height': [0, this.slideInfoZone.normalHeight]});
      if (this.options.showCarousel)
         this.slideInfoZone.chain(this.centerCarouselOn.pass(this.currentIter, this));
      return this.slideInfoZone;
   },
   hideInfoSlideShow: function() {
      this.fireEvent('onHideInfopane');
      this.slideInfoZone.stop();
      this.slideInfoZone.start({'opacity': 0, 'height': 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');
   }
});
gallery.implement(new Events);
gallery.implement(new Options);

/* All code copyright 2006 Jonathan Schemoul */