/*
    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 autoScrollSpeed = 4;  // Autoscroll speed  - Higher = faster
var autoScrollActive = true;

function autoScroll(direction,yPos)
  {
    if(document.documentElement.scrollHeight>documentScrollHeight && direction>0)return;

    window.scrollBy(0,direction);

    if(direction<0){
      if(document.documentElement.scrollTop>0){
        mouse_y = mouse_y - direction;
        if(useRectangle){
          dragObject.style.top = (el_y - mouse_y + yPos) + 'px';
        }else{
          dragDropMoveLayer.style.top = (el_y - mouse_y + yPos) + 'px';
        }
      }else{
        autoScrollActive = false;
      }
    }else{
      if(yPos>(documentHeight-50)){

        mouse_y = mouse_y - direction;
        if(useRectangle){
          dragObject.style.top = (el_y - mouse_y + yPos) + 'px';
        }else{
          dragDropMoveLayer.style.top = (el_y - mouse_y + yPos) + 'px';
        }
      }else{
        autoScrollActive = false;
      }
    }
    if(autoScrollActive)setTimeout('autoScroll('+direction+',' + yPos + ')',5);
  }


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({
  initialize: function(element, options) {
    this.setOptions({
      showArrows: true,
      showCarousel: true,
      showCarouselOnStart: false,
      showInfopane: true,
      thumbHeight: 100,
      thumbWidth: 100,
      thumbSpacing: 10,
      thumbUnselectedOpacity:.1,
      embedLinks: false,
      fadeDuration: 500,
      timed: false,
      delay: 9000,
      preloader: true,
      manualData: [],
      populateData: true,
      elementSelector: "div.imageElement",
      titleSelector: "h3.title",
      subtitleSelector: "p",
      linkSelector: "a.open",
      imageSelector: "img.full",
      thumbnailSelector: "img.thumbnail",
      slideInfoZoneOpacity: 0.9,
      carouselMinimizedOpacity: 0.4,
      carouselMinimizedHeight: 20,
      carouselMaximizedOpacity: 0.7,
      carouselTop:0,
      destroyAfterPopulate: true,
      baseClass: 'jdGallery',
      withArrowsClass: 'withArrows',
      textShowCarousel: 'Pictures',
      useThumbGenerator: false,
      thumbGenerator: 'resizer.php'
    }, 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";
		var data = this.galleryData
    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;
    var 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);
    if (this.options.showCarousel)
    {
      this.clearThumbnailsHighlights();
      this.thumbnailElements[0].clearTimer();
      this.thumbnailElements[0].custom(0.99);
      var tmp = (this.thumbnailElements[0].relatedImage.title==''?'':':')
      $(this.carouselLabel).setHTML('<span class="number">' + (this.thumbnailElements[0].relatedImage.number + 1) + "/" + this.maxIter + tmp +"</span> " + this.thumbnailElements[0].relatedImage.title);
    }

  },
  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();
      this.thumbnailElements[num].clearTimer();
      this.thumbnailElements[num].custom(0.99);
      var tmp = (this.thumbnailElements[num].relatedImage.title==''?'':':')
      $(this.carouselLabel).setHTML('<span class="number">' + (this.thumbnailElements[num].relatedImage.number + 1) + "/" + this.maxIter + tmp + "</span> " + this.thumbnailElements[num].relatedImage.title);
    }
    },
  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)
      $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;
    if(this.options.showCarouselOnStart)
      this.carouselContainer.set({'opacity': this.options.carouselMaximizedOpacity, 'top': this.options.carouselTop});
    else
      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 + 1)) +  this.options.thumbWidth) + "px";
  },
  toggleCarousel: function() {
    if (this.carouselActive)
      this.hideCarousel();
    else
      this.showCarousel();
  },
  showCarousel: function () {
    this.fireEvent('onShowCarousel');
    this.carouselContainer.custom({
      'opacity': this.options.carouselMaximizedOpacity,
      'top': this.options.carouselTop
    }).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 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.thumbUnselectedOpacity);
      currentImg.element.addEvents({
        'mouseover': function (myself) {
          myself.clearTimer();
          myself.custom(0.99);
          var tmp = (myself.relatedImage.title==''?'':':')
          $(this.carouselLabel).setHTML('<span class="number">' + (myself.relatedImage.number + 1) + "/" + this.maxIter + tmp +"</span> " + myself.relatedImage.title);
        }.pass(currentImg, this),
        'mouseout': function (myself) {
          myself.clearTimer();
          myself.custom(this.options.thumbUnselectedOpacity);
        }.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(this.options.thumbUnselectedOpacity);
    }
  },
  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.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.galleryData[this.currentIter].title=='' && this.galleryData[this.currentIter].description=='')
    {
      this.slideInfoZone.custom({'opacity': 0, 'height': 0});
    }else{
      this.slideInfoZone.custom({'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.clearTimer();
    this.slideInfoZone.custom({'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 */