/*
    This file is part of JonDesign's SmoothGallery v2.1beta1.

    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.
	- Harald Kirschner (digitarald: http://digitarald.de/) for all his great libs. Some used here as plugins.
*/

/* some quirks to circumvent broken stuff in mt1.2 */
function isBody(element){
	return (/^(?:body|html)$/i).test(element.tagName);
};
Element.implement({
	getPosition: function(relative){
		if (isBody(this)) return {x: 0, y: 0};
		var el = this, position = {x: 0, y: 0};
		while (el){
			position.x += el.offsetLeft;
			position.y += el.offsetTop;
			el = el.offsetParent;
		}
		var rpos = (relative) ? $(relative).getPosition() : {x: 0, y: 0};
		return {x: position.x - rpos.x, y: position.y - rpos.y};
	}
});

// declaring the class
var gallery = {
	Implements: [Events, Options],
	options: {
		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: 'Browse',
		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,
		/* Plugins: ReMooz */
		useReMooz: false
	},
	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.useReMooz&&(this.options.defaultTransition=="fade"))
			this.options.defaultTransition="crossfade";
		
		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.options.useReMooz))
		{
			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 = $H({
				image: el.getElement(options.imageSelector).getProperty('src'),
				number: currentArrayPlace,
				transition: this.options.defaultTransition
			});
			if ((options.showInfopane) | (options.showCarousel))
				elementDict.extend({
					title: el.getElement(options.titleSelector).innerHTML,
					description: el.getElement(options.subtitleSelector).innerHTML
				});
			if ((options.embedLinks) | (options.useReMooz))
				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.dispose();
		});
		return data;
	},
	constructElements: function() {
		el = this.galleryElement;
		if (this.options.embedLinks && (!this.options.showArrows))
			el = this.currentLink;
		this.maxIter = this.galleryData.length;
		var currentImg;
		for(i=0;i<this.galleryData.length;i++)
		{
			var currentImg = new Fx.Morph(
				new Element('div').addClass('slideElement').setStyles({
					'position':'absolute',
					'left':'0px',
					'right':'0px',
					'margin':'0px',
					'padding':'0px',
					'backgroundPosition':"center center",
					'opacity':'0'
				}).injectInside(el),
				{duration: this.options.fadeDuration}
			);
			if (this.options.preloader)
			{
				currentImg.source = this.galleryData[i].image;
				currentImg.loaded = false;
				currentImg.load = function(imageStyle, i) {
					if (!imageStyle.loaded)	{
						this.galleryData[i].imgloader = new Asset.image(imageStyle.source, {
		                            'onload'  : function(img, i){
													img.element.setStyle(
													'backgroundImage',
													"url('" + img.source + "')")
													img.loaded = true;
													img.width = this.galleryData[i].imgloader.width;
													img.height = this.galleryData[i].imgloader.height;
												}.pass([imageStyle, i], this)
						});
					}
				}.pass([currentImg, i], 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);
		if (this.options.useReMooz)
			this.makeReMooz.delay(1000, this);
		var textShowCarousel = formatString(this.options.textShowCarousel, this.currentIter+1, this.maxIter);
		if (this.options.showCarousel&&(!this.options.carouselPreloader)&&(!this.options.useExternalCarousel))
			this.carouselBtn.set('html', 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;
			if (this.options.useReMooz)
				this.makeReMooz();
		}
		var textShowCarousel = formatString(this.options.textShowCarousel, num+1, this.maxIter);
		if ((this.options.showCarousel)&&(!this.options.useExternalCarousel))
			this.carouselBtn.set('html', 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.Morph(carouselContainerElement, {transition: Fx.Transitions.Expo.easeOut});
			this.carouselContainer.normalHeight = carouselContainerElement.offsetHeight;
			this.carouselContainer.set({'opacity': this.options.carouselMinimizedO