/* Lightbox v2.04 by Lokesh Dhakar - http://www.lokeshdhakar.com/projects/lightbox2/ - Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/ */
LightboxOptions = Object.extend({ fileLoadingImage: '/App/Modlets/Bildergalerie/Lightbox/images/loading.gif', fileBottomNavCloseImage: '/App/Modlets/Bildergalerie/Lightbox/images/close.gif', fileBottomNavPlayImage: '/App/Modlets/Bildergalerie/Lightbox/images/play.gif', fileBottomNavStopImage: '/App/Modlets/Bildergalerie/Lightbox/images/stop.gif', autoPlayDelay: 6.0, overlayOpacity: 0.8, animate: true, resizeSpeed: 7, borderSize: 10, labelImage: "", labelOf: " / " }, window.LightboxOptions || {}); var Lightbox = Class.create(); Lightbox.prototype = { imageArray: [], activeImage: undefined, initialize: function () { this.updateImageList(); this.keyboardAction = this.keyboardAction.bindAsEventListener(this); if (LightboxOptions.resizeSpeed > 10) LightboxOptions.resizeSpeed = 10; if (LightboxOptions.resizeSpeed < 1) LightboxOptions.resizeSpeed = 1; this.resizeDuration = LightboxOptions.animate ? ((11 - LightboxOptions.resizeSpeed) * 0.15) : 0; this.overlayDuration = LightboxOptions.animate ? 0.2 : 0; var size = (LightboxOptions.animate ? 250 : 1) + 'px'; this.autoPlay = false; this.autoPlayTimeout = null; var objBody = $$('body')[0]; objBody.appendChild(Builder.node('div', { id: 'overlay', style: 'display:none' })); objBody.appendChild(Builder.node('div', { id: 'lightbox' }, [Builder.node('div', { id: 'outerImageContainer' }, Builder.node('div', { id: 'imageContainer' }, [Builder.node('img', { id: 'lightboxImage' }), Builder.node('div', { id: 'hoverNav' }, [Builder.node('a', { id: 'prevLink', href: '#' }), Builder.node('a', { id: 'nextLink', href: '#' })]), Builder.node('div', { id: 'loading' }, Builder.node('a', { id: 'loadingLink', href: '#' }, Builder.node('img', { src: LightboxOptions.fileLoadingImage })))])), Builder.node('div', { id: 'imageDataContainer' }, Builder.node('div', { id: 'imageData' }, [Builder.node('div', { id: 'imageDetails' }, [Builder.node('span', { id: 'caption' }), Builder.node('span', { id: 'numberDisplay' })]), Builder.node('div', { id: 'bottomNav' }, [Builder.node('a', { id: 'bottomNavClose', href: '#' }, Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })), Builder.node('a', { id: 'bottomNavPlay', href: '#' }, Builder.node('img', { src: LightboxOptions.fileBottomNavPlayImage })), Builder.node('a', { id: 'bottomNavStop', href: '#' }, Builder.node('img', { src: LightboxOptions.fileBottomNavStopImage }))])]))])); $('overlay').hide().observe('click', (function () { this.end(); }).bind(this)); $('lightbox').hide().observe('click', (function (event) { if (event.element().id == 'lightbox') this.end(); }).bind(this)); $('outerImageContainer').setStyle({ width: size, height: size }); $('prevLink').observe('click', (function (event) { event.stop(); this.changeImage(this.activeImage - 1); }).bindAsEventListener(this)); $('nextLink').observe('click', (function (event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this)); $('loadingLink').observe('click', (function (event) { event.stop(); this.end(); }).bind(this)); $('bottomNavClose').observe('click', (function (event) { event.stop(); this.end(); }).bind(this)); $('bottomNavPlay').observe('click', (function (event) { event.stop(); this.startAutoPlay(); }).bind(this)); $('bottomNavStop').observe('click', (function (event) { event.stop(); this.stopAutoPlay(); }).bind(this)); var th = this; (function () { var ids = 'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav prevLink nextLink loading loadingLink ' + 'imageDataContainer imageData imageDetails caption numberDisplay bottomNav bottomNavClose bottomNavPlay bottomNavStop'; $w(ids).each(function (id) { th[id] = $(id); }); }).defer(); }, updateImageList: function () { this.updateImageList = Prototype.emptyFunction; document.observe('click', (function (event) { var target = event.findElement('img[class^=gal_lightbox]') || event.findElement('a[class^=cab_LightboxLink]'); if (target) { event.stop(); this.start(target); } }).bind(this)); }, start: function (imageLink) {
	$$('select', 'object', 'embed').each(function (node) { node.style.visibility = 'hidden' }); var arrayPageSize = this.getPageSize(); $('overlay').setStyle({ width: arrayPageSize[0] + 'px', height: arrayPageSize[1] + 'px' }); new Effect.Appear(this.overlay, { duration: this.overlayDuration, from: 0.0, to: LightboxOptions.overlayOpacity }); this.imageArray = []; var imageNum = 0; if (imageLink.hasClassName("gal_lightbox")) { this.imageArray.push([imageLink.readAttribute('longdesc'), imageLink.readAttribute('title')]); } else {
		this.imageArray = $$('img[longdesc][class="' + imageLink.readAttribute('class') + '"]', 'a[href][class="' + imageLink.readAttribute('class') + '"]').collect(function (image) { return [(image.readAttribute('longdesc') || image.readAttribute("href")), image.readAttribute('title')]; }).uniq(); while (this.imageArray[imageNum][0] != imageLink.readAttribute('longdesc') && this.imageArray[imageNum][0] != imageLink.readAttribute('href'))
			imageNum++;
	}
	this.lightbox.removeClassName("autoPlay"); this.lightbox[(this.imageArray.length > 1 ? "remove" : "add") + "ClassName"]("noAutoPlay");
	var arrayPageScroll = document.viewport.getScrollOffsets(); var lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 10); var lightboxLeft = arrayPageScroll[0]; this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show(); this.changeImage(imageNum);
}, changeImage: function (imageNum) {
	this.activeImage = imageNum; if (LightboxOptions.animate) this.loading.show(); this.lightboxImage.hide(); this.hoverNav.hide(); this.prevLink.hide(); this.nextLink.hide(); this.imageDataContainer.setStyle({ opacity: .0001 }); this.numberDisplay.hide(); var imgPreloader = new Image(); if (!!this.autoPlayTimeout)
		window.clearTimeout(this.autoPlayTimeout); imgPreloader.onload = (function () { this.lightboxImage.src = this.imageArray[this.activeImage][0]; this.resizeImageContainer(imgPreloader.width, imgPreloader.height); }).bind(this); imgPreloader.src = this.imageArray[this.activeImage][0];
}, resizeImageContainer: function (imgWidth, imgHeight) {
	var widthCurrent = this.outerImageContainer.getWidth(); var heightCurrent = this.outerImageContainer.getHeight(); var widthNew = (imgWidth + LightboxOptions.borderSize * 2); var heightNew = (imgHeight + LightboxOptions.borderSize * 2); var xScale = (widthNew / widthCurrent) * 100; var yScale = (heightNew / heightCurrent) * 100; var wDiff = widthCurrent - widthNew; var hDiff = heightCurrent - heightNew; if (hDiff != 0) new Effect.Scale(this.outerImageContainer, yScale, { scaleX: false, duration: this.resizeDuration, queue: 'front' }); if (wDiff != 0) new Effect.Scale(this.outerImageContainer, xScale, { scaleY: false, duration: this.resizeDuration, delay: this.resizeDuration }); var timeout = 0; if ((hDiff == 0) && (wDiff == 0)) { timeout = 100; if (Prototype.Browser.IE) timeout = 250; }
	(function () { this.prevLink.setStyle({ height: imgHeight + 'px' }); this.nextLink.setStyle({ height: imgHeight + 'px' }); this.imageDataContainer.setStyle({ width: widthNew + 'px' }); this.showImage(); }).bind(this).delay(timeout / 1000);
}, showImage: function () { this.loading.hide(); new Effect.Appear(this.lightboxImage, { duration: this.resizeDuration, queue: 'end', afterFinish: (function () { this.updateDetails(); }).bind(this) }); this.preloadNeighborImages(); if (this.autoPlay == true) { this.autoPlayTimeout = window.setTimeout((function () { this.changeImage(this.imageArray.length > this.activeImage + 1 ? (this.activeImage + 1) : 0); }).bind(this), LightboxOptions.autoPlayDelay * 1000); } }, updateDetails: function () {
	this.caption.update(this.imageArray[this.activeImage][1]).show(); if (this.imageArray.length > 1) { this.numberDisplay.update(LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show(); }
	new Effect.Parallel([new Effect.SlideDown(this.imageDataContainer, { sync: true, duration: this.resizeDuration, from: 0.0, to: 1.0 }), new Effect.Appear(this.imageDataContainer, { sync: true, duration: this.resizeDuration })], { duration: this.resizeDuration, afterFinish: (function () { var arrayPageSize = this.getPageSize(); this.overlay.setStyle({ height: arrayPageSize[1] + 'px' }); this.updateNav(); }).bind(this) });
}, updateNav: function () { this.hoverNav.show(); if (this.activeImage > 0) this.prevLink.show(); if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show(); this.enableKeyboardNav(); }, enableKeyboardNav: function () { document.observe('keydown', this.keyboardAction); }, disableKeyboardNav: function () { document.stopObserving('keydown', this.keyboardAction); }, keyboardAction: function (event) {
	var keycode = event.keyCode; var escapeKey; if (event.DOM_VK_ESCAPE) { escapeKey = event.DOM_VK_ESCAPE; } else { escapeKey = 27; }
	var key = String.fromCharCode(keycode).toLowerCase(); if (key.match(/x|o|c/) || (keycode == escapeKey)) { this.end(); } else if ((key == 'p') || (keycode == 37)) { if (this.activeImage != 0) { this.disableKeyboardNav(); this.changeImage(this.activeImage - 1); } } else if ((key == 'n') || (keycode == 39)) { if (this.activeImage != (this.imageArray.length - 1)) { this.disableKeyboardNav(); this.changeImage(this.activeImage + 1); } } 
}, preloadNeighborImages: function () {
	var preloadNextImage, preloadPrevImage; if (this.imageArray.length > this.activeImage + 1) { preloadNextImage = new Image(); preloadNextImage.src = this.imageArray[this.activeImage + 1][0]; }
	if (this.activeImage > 0) { preloadPrevImage = new Image(); preloadPrevImage.src = this.imageArray[this.activeImage - 1][0]; } 
}, end: function () { this.stopAutoPlay(); this.disableKeyboardNav(); this.lightbox.hide(); new Effect.Fade(this.overlay, { duration: this.overlayDuration }); $$('select', 'object', 'embed').each(function (node) { node.style.visibility = 'visible' }); }, getPageSize: function () {
	var xScroll, yScroll; if (window.innerHeight && window.scrollMaxY) { xScroll = window.innerWidth + window.scrollMaxX; yScroll = window.innerHeight + window.scrollMaxY; } else if (document.body.scrollHeight > document.body.offsetHeight) { xScroll = document.body.scrollWidth; yScroll = document.body.scrollHeight; } else { xScroll = document.body.offsetWidth; yScroll = document.body.offsetHeight; }
	var windowWidth, windowHeight; if (self.innerHeight) {
		if (document.documentElement.clientWidth) { windowWidth = document.documentElement.clientWidth; } else { windowWidth = self.innerWidth; }
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { windowWidth = document.documentElement.clientWidth; windowHeight = document.documentElement.clientHeight; } else if (document.body) { windowWidth = document.body.clientWidth; windowHeight = document.body.clientHeight; }
	if (yScroll < windowHeight) { pageHeight = windowHeight; } else { pageHeight = yScroll; }
	if (xScroll < windowWidth) { pageWidth = xScroll; } else { pageWidth = windowWidth; }
	return [pageWidth, pageHeight];
}, startAutoPlay: function () { this.stopAutoPlay(); this.lightbox.addClassName("autoPlay"); this.autoPlay = true; this.autoPlayTimeout = window.setTimeout((function () { this.changeImage(this.imageArray.length > this.activeImage + 1 ? (this.activeImage + 1) : 0); }).bind(this), LightboxOptions.autoPlayDelay * 500); }, stopAutoPlay: function () {
	this.autoPlay = false; this.lightbox.removeClassName("autoPlay"); if (!this.autoPlayTimeout)
		return; window.clearTimeout(this.autoPlayTimeout); this.autoPlayTimeout = null;
} 
}
var globalLightbox = null; document.observe('dom:loaded', function () { globalLightbox = new Lightbox(); });