// -----------------------------------------------------------------------------------
//
//	Lightbox v2.04
//	by Lokesh Dhakar - http://www.lokeshdhakar.com
//	Last Modification: 2/9/08
//
//	For	more information, visit:
//	http://lokeshdhakar.com/projects/lightbox2/
//
//	Licensed under the Creative	Commons	Attribution	2.5	License	- http://creativecommons.org/licenses/by/2.5/
//		- Free for use in both personal	and	commercial projects
//		- Attribution requires leaving author name,	author link, and the license info intact.
//
//	Thanks:	Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
//			Artemy Tregubenko (arty.name) for cleanup and help in updating to latest ver of	proto-aculous.
//
// -----------------------------------------------------------------------------------

LightboxOptions	= Object.extend({
	fileLoadingImage:		 '../scripts/lightbox/images/loading.gif',
	fileBottomNavCloseImage: '../scripts/lightbox/images/closelabel.gif',
	fileBottomNavPlayImage:	 '../scripts/lightbox/images/playlabel.gif',
	fileBottomNavPauseImage:	 '../scripts/lightbox/images/pauselabel.gif',
    keyboardShortcuts: 'tt_on(\'<b>Klávesové zkratky:</b><br /><table style="font-size: 100%"><tr><td>Esc, x</td><td>návrat zpět</td></tr><tr><td>0</td><td>pozastavení slideshow</td></tr><tr><td>1,2,3,4,5,6,7,8,9&nbsp;</td><td>interval mezi obrázky ve vteřinách</td></tr><tr><td>n</td><td>následující obrázek</td></tr><tr><td>p</td><td>předchozí obrázek</td></tr></table>\')',

	overlayOpacity:	0.8,

	animate: true,
	resizeSpeed: 7,

	borderSize:	10,

	labelImage:	"",
	labelOf: " / "
}, window.LightboxOptions || {});

// -----------------------------------------------------------------------------------

var	lightboxOb=null;
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';

		var	objBody	= $$('body')[0];

		objBody.appendChild(Builder.node('div',{id:'overlay'}));

		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('a',{id:'bottomNavPlay', href:	'#'	},
							Builder.node('img',	{ src: LightboxOptions.fileBottomNavPlayImage })
						),
						Builder.node('a',{id:'bottomNavPause', href: '#' },
							Builder.node('img',	{ src: LightboxOptions.fileBottomNavPauseImage })
						),
						Builder.node('span',{id:'numberDisplay', onmouseover: LightboxOptions.keyboardShortcuts, onmouseout: 'tt_off()'}),
                        Builder.node('span',{id:'skHelp', onmouseover: LightboxOptions.keyboardShortcuts, onmouseout: 'tt_off()'},'?')
					]),
					Builder.node('div',{id:'bottomNav'},
						Builder.node('a',{id:'bottomNavClose', href: '#' },
							Builder.node('img',	{ src: LightboxOptions.fileBottomNavCloseImage })
						)
					)
				])
			)
		]));

		$('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.slideshow(); }).bind(this));
		$('bottomNavPause').observe('click', (function(event) {	event.stop(); this.stopslideshow();	}).bind(this));

		var	th = this;
		(function(){
			var	ids	=
				'overlay lightbox outerImageContainer imageContainer lightboxImage hoverNav	prevLink nextLink loading loadingLink '	+
				'imageDataContainer	imageData imageDetails caption numberDisplay skHelp bottomNav bottomNavClose bottomNavPlay	bottomNavPause';
			$w(ids).each(function(id){ th[id] =	$(id); });
		}).defer();
	},

	updateImageList: function()	{
		this.updateImageList = Prototype.emptyFunction;

		document.observe('click', (function(event){
			var	target = event.findElement('a[rel^=lightbox]') || event.findElement('area[rel^=lightbox]');
			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.rel == 'lightbox')){
			this.imageArray.push([imageLink.href, imageLink.title]);
		} else {
			this.imageArray	=
				$$(imageLink.tagName + '[href][rel="' +	imageLink.rel +	'"]').
				collect(function(anchor){ return [anchor.href, anchor.title]; }).
				uniq();

			while (this.imageArray[imageNum][0]	!= imageLink.href) { imageNum++; }
		}

		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 (window.lightbox_onbeginimagechange)	lightbox_onbeginimagechange();

		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();
		this.skHelp.hide();

		var	imgPreloader = new Image();

		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(){
		if (window.lightbox_onbeginimageshow) lightbox_onbeginimageshow();
		this.loading.hide();
		new	Effect.Appear(this.lightboxImage, {
			duration: this.resizeDuration,
			queue: 'end',
			afterFinish: (function(){ this.updateDetails();	}).bind(this)
		});
		this.preloadNeighborImages();
	},

	updateDetails: function() {

		if (this.imageArray[this.activeImage][1] !=	""){
			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();
		}
		
		this.skHelp.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);
		if (window.lightbox_onendimageshow)	lightbox_onendimageshow();
	},

	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 (keycode>48 && keycode<58 || keycode>96 && keycode<106) {
        	var speed= keycode-48;
        	if (keycode>96) speed= keycode-96;
        	this.speedslideshow(speed);
        } else if (keycode == 48 || keycode==96) {
        	this.stopslideshow();
        } else 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.disableKeyboardNav();
		this.lightbox.hide();
		new	Effect.Fade(this.overlay, {	duration: this.overlayDuration });
		$$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'visible' });
		if (window.lightbox_onclose) lightbox_onclose();
	},

	startslideshow:	function(imageLink)	{
		this.bottomNavPlay.hide();
		this.bottomNavPause.show();
		this.start(imageLink);
	},
	slideshow: function() {
		if (window.lightbox_startslideshow)
		{
			this.bottomNavPlay.hide();
			this.bottomNavPause.show();
			lightbox_startslideshow();
		}
	},

	stopslideshow: function() {
		if (window.lightbox_stopslideshow)
		{
			this.bottomNavPlay.show();
			this.bottomNavPause.hide();
			lightbox_stopslideshow();
		}
	},
	speedslideshow: function(speed) {
        if (window.lightbox_speedslideshow)
        {
        	this.bottomNavPlay.hide();
        	this.bottomNavPause.show();
        	lightbox_speedslideshow(speed);
        }
    },

	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];
	}
}

document.observe('dom:loaded', function	() { lightboxOb= new Lightbox(); });

var slideshowint=0;var processnext=false;var slideshowtm=0;function set_ss_cookie(n,v,expiredays){var exdate=new Date();exdate.setDate(exdate.getDate()+expiredays);document.cookie=n+"="+escape(v)+((expiredays==null)?'':';expires='+exdate.toGMTString())+';path=/;domain='+escape('.fotopatracka.cz')}function get_ss_cookie(n){if(document.cookie.length>0){var s=document.cookie.indexOf(n+'=');if(s!=-1){s=s+n.length+1;var e=document.cookie.indexOf(';',s);if(e==-1)e=document.cookie.length;return unescape(document.cookie.substring(s,e))}}return''}function doslideshow(){if(lightboxOb){var ssp=get_ss_cookie('sstmint');if(ssp!='')slideshowpause=Number(ssp);startslideshow()}else setTimeout('doslideshow()',1000)}function startslideshow(){stopslideshow();slideshowint=slideshowpause;var ob=document.getElementById('a1');if(ob&&lightboxOb)lightboxOb.startslideshow(ob);return false}function stopslideshow(){clearSlideshowTimeout();slideshowint=0;processnext=false;return false}function clearSlideshowTimeout(){if(slideshowtm!=0){clearTimeout(slideshowtm);slideshowtm=0}}function timeNextImage(){if(lightboxOb.activeImage<(lightboxOb.imageArray.length-1)){clearSlideshowTimeout();slideshowtm=setTimeout('nextImage()',slideshowint)}else{stopslideshow();lightboxOb.bottomNavPlay.show();lightboxOb.bottomNavPause.hide()}}function firstImage(){lightboxOb.disableKeyboardNav();lightboxOb.changeImage(0)}function nextImage(){if(processnext){if(lightboxOb.activeImage<(lightboxOb.imageArray.length-1)){lightboxOb.disableKeyboardNav();lightboxOb.changeImage(lightboxOb.activeImage+1)}}}function lightbox_startslideshow(){if(slideshowint==0&&processnext==false){slideshowint=slideshowpause;processnext=true;if(lightboxOb.activeImage<(lightboxOb.imageArray.length-1))nextImage();else firstImage()}return false}function lightbox_stopslideshow(){stopslideshow();return false}function lightbox_onbeginimagechange(){if(typeof slideshowtitle=='string')document.title=slideshowtitle.replace('%',(lightboxOb.activeImage+1)+'/'+lightboxOb.imageArray.length);processnext=false}function lightbox_onbeginimageshow(){if(slideshowint==0)lightboxOb.bottomNavPause.hide()}function lightbox_onendimageshow(){if(slideshowint>0){processnext=true;timeNextImage()}}function lightbox_speedslideshow(speed){slideshowpause=1000*speed;if (slideshowint != 0) slideshowint=slideshowpause;set_ss_cookie('sstmint',String(slideshowpause),2000);lightbox_startslideshow()}