/*
Title  : vamet.la - Fabula quanta fui
URL    : http://www.vamet.la/
Author : Mateusz Kiczela
E-mail : webmaster@vamet.la
Script : Lightbox
Author : Unknown
*/
var fileLoadingImage = "image_loading.gif";
var fileBottomNavCloseImage = "image_close.gif";
var resizeSpeed = 7;
var borderSize = 10;
var imageArray = new Array;
var activeImage;

if (resizeSpeed > 10) {
	resizeSpeed = 10;
}

if (resizeSpeed < 1) {
	resizeSpeed = 1;
}

resizeDuration = (11 - resizeSpeed) * 0.15;

Object.extend(Element, {
	getWidth: function(element) {
		element = $(element);
		return element.offsetWidth;
	},
	setWidth: function(element,w) {
		element = $(element);
		element.style.width = w +"px";
	},
	setHeight: function(element,h) {
		element = $(element);
		element.style.height = h +"px";
	},
	setTop: function(element,t) {
		element = $(element);
		element.style.top = t +"px";
	},
	setSrc: function(element,src) {
		element = $(element);
		element.src = src;
	},
	setHref: function(element,href) {
		element = $(element);
		element.href = href;
	},
	setInnerHTML: function(element,content) {
		element = $(element);
		element.innerHTML = content;
	}
});

Array.prototype.removeDuplicates = function () {
	for(i = 1; i < this.length; i++) {
		if (this[i][0] == this[i-1][0]) {
			this.splice(i,1);
		}
	}
}

Array.prototype.empty = function () {
	for(i = 0; i <= this.length; i++) {
		this.shift();
	}
}

var Lightbox = Class.create();

Lightbox.prototype = {
	initialize: function() {
		if (!document.getElementsByTagName) {
			return;
		}
		var anchors = document.getElementsByTagName('a');
		for (var i=0; i<anchors.length; i++) {
			var anchor = anchors[i];
			var relAttribute = String(anchor.getAttribute('rel'));
			if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('lightbox'))) {
				anchor.onclick = function () {
					myLightbox.start(this);
					return false;
				}
			}
		}
		var objBody = document.getElementsByTagName("body").item(0);
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() {
			myLightbox.end();
			return false;
		}
		objBody.appendChild(objOverlay);
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objBody.appendChild(objLightbox);
		var objOuterImageContainer = document.createElement("div");
		objOuterImageContainer.setAttribute('id','outerImageContainer');
		objLightbox.appendChild(objOuterImageContainer);
		var objImageContainer = document.createElement("div");
		objImageContainer.setAttribute('id','imageContainer');
		objOuterImageContainer.appendChild(objImageContainer);
		var objLightboxImage = document.createElement("img");
		objLightboxImage.setAttribute('id','lightboxImage');
		objImageContainer.appendChild(objLightboxImage);
		var objHoverNav = document.createElement("div");
		objHoverNav.setAttribute('id','hoverNav');
		objImageContainer.appendChild(objHoverNav);
		var objPrevLink = document.createElement("a");
		objPrevLink.setAttribute('id','prevLink');
		objPrevLink.setAttribute('href','#');
		objHoverNav.appendChild(objPrevLink);
		var objNextLink = document.createElement("a");
		objNextLink.setAttribute('id','nextLink');
		objNextLink.setAttribute('href','#');
		objHoverNav.appendChild(objNextLink);
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','loading');
		objImageContainer.appendChild(objLoading);
		var objLoadingLink = document.createElement("a");
		objLoadingLink.setAttribute('id','loadingLink');
		objLoadingLink.setAttribute('href','#');
		objLoadingLink.onclick = function() {
			myLightbox.end();
			return false;
		}
		objLoading.appendChild(objLoadingLink);
		var objLoadingImage = document.createElement("img");
		objLoadingImage.setAttribute('src', fileLoadingImage);
		objLoadingLink.appendChild(objLoadingImage);
		var objImageDataContainer = document.createElement("div");
		objImageDataContainer.setAttribute('id','imageDataContainer');
		objImageDataContainer.className = 'clearfix';
		objLightbox.appendChild(objImageDataContainer);
		var objImageData = document.createElement("div");
		objImageData.setAttribute('id','imageData');
		objImageDataContainer.appendChild(objImageData);
		var objImageDetails = document.createElement("div");
		objImageDetails.setAttribute('id','imageDetails');
		objImageData.appendChild(objImageDetails);
		var objCaption = document.createElement("span");
		objCaption.setAttribute('id','caption');
		objImageDetails.appendChild(objCaption);
		var objNumberDisplay = document.createElement("span");
		objNumberDisplay.setAttribute('id','numberDisplay');
		objImageDetails.appendChild(objNumberDisplay);
		var objBottomNav = document.createElement("div");
		objBottomNav.setAttribute('id','bottomNav');
		objImageData.appendChild(objBottomNav);
		var objBottomNavCloseLink = document.createElement("a");
		objBottomNavCloseLink.setAttribute('id','bottomNavClose');
		objBottomNavCloseLink.setAttribute('href','#');
		objBottomNavCloseLink.onclick = function() {
			myLightbox.end();
			return false;
		}
		objBottomNav.appendChild(objBottomNavCloseLink);
		var objBottomNavCloseImage = document.createElement("img");
		objBottomNavCloseImage.setAttribute('src', fileBottomNavCloseImage);
		objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
	},
	start: function(imageLink) {
		hideSelectBoxes();
		var arrayPageSize = getPageSize();
		Element.setHeight('overlay', arrayPageSize[1]);
		new Effect.Appear('overlay', {
			duration: 0.2, from: 0.0, to: 0.8
		});
		imageArray = [];
		imageNum = 0;
		if (!document.getElementsByTagName) {
			return;
		}
		var anchors = document.getElementsByTagName('a');
		if ((imageLink.getAttribute('rel') == 'lightbox')) {
			imageArray.push(new Array(imageLink.getAttribute('href'), imageLink.getAttribute('title')));
		}
		else {
			for (var i=0; i<anchors.length; i++) {
				var anchor = anchors[i];
				if (anchor.getAttribute('href') && (anchor.getAttribute('rel') == imageLink.getAttribute('rel'))) {
					imageArray.push(new Array(anchor.getAttribute('href'), anchor.getAttribute('title')));
				}
			}
			imageArray.removeDuplicates();
			while(imageArray[imageNum][0] != imageLink.getAttribute('href')) {
				imageNum++;
			}
		}
		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var lightboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);
		Element.setTop('lightbox', lightboxTop);
		Element.show('lightbox');
		this.changeImage(imageNum);
	},
	changeImage: function(imageNum) {
		activeImage = imageNum;
		Element.show('loading');
		Element.hide('lightboxImage');
		Element.hide('hoverNav');
		Element.hide('prevLink');
		Element.hide('nextLink');
		Element.hide('imageDataContainer');
		Element.hide('numberDisplay');
		imgPreloader = new Image();
		imgPreloader.onload=function() {
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
		}
		imgPreloader.src = imageArray[activeImage][0];
	},
	resizeImageContainer: function(imgWidth, imgHeight) {
		this.wCur = Element.getWidth('outerImageContainer');
		this.hCur = Element.getHeight('outerImageContainer');
		this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
		this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;
		wDiff = (this.wCur - borderSize * 2) - imgWidth;
		hDiff = (this.hCur - borderSize * 2) - imgHeight;
		if (!( hDiff == 0)) {
			new Effect.Scale('outerImageContainer', this.yScale, {
				scaleX: false, duration: resizeDuration, queue: 'front'
			});
		}
		if (!( wDiff == 0)) {
			new Effect.Scale('outerImageContainer', this.xScale, {
				scaleY: false, delay: resizeDuration, duration: resizeDuration
			});
		}
		if ((hDiff == 0) && (wDiff == 0)) {
			if (navigator.appVersion.indexOf("MSIE")!=-1) {
				pause(250);
			}
			else {
				pause(100);
			}
		}
		Element.setHeight('prevLink', imgHeight);
		Element.setHeight('nextLink', imgHeight);
		Element.setWidth('imageDataContainer', imgWidth + (borderSize * 2));
		this.showImage();
	},
	showImage: function() {
		Element.hide('loading');
		new Effect.Appear('lightboxImage', {
			duration: 0.5, queue: 'end', afterFinish: function() {
				myLightbox.updateDetails();
			}
		});
		this.preloadNeighborImages();
	},
	updateDetails: function() {
		Element.show('caption');
		Element.setInnerHTML( 'caption', imageArray[activeImage][1]);
		if (imageArray.length > 1) {
			Element.show('numberDisplay');
			Element.setInnerHTML( 'numberDisplay', "Fotografia " + eval(activeImage + 1) + " z " + imageArray.length);
		}
		new Effect.Parallel([ new Effect.SlideDown( 'imageDataContainer', {
		   sync: true, duration: resizeDuration + 0.25, from: 0.0, to: 1.0
		}),
		new Effect.Appear('imageDataContainer', {
			sync: true, duration: 1.0
		})
		], {
			duration: 0.65, afterFinish: function() {
				myLightbox.updateNav();
			}
		}
		);
	},
	updateNav: function() {
		Element.show('hoverNav');
		if (activeImage != 0) {
			Element.show('prevLink');
			document.getElementById('prevLink').onclick = function() {
				myLightbox.changeImage(activeImage - 1);
				return false;
			}
		}
		if (activeImage != (imageArray.length - 1)) {
			Element.show('nextLink');
			document.getElementById('nextLink').onclick = function() {
				myLightbox.changeImage(activeImage + 1);
				return false;
			}
		}
		this.enableKeyboardNav();
	},
	enableKeyboardNav: function() {
		document.onkeydown = this.keyboardAction;
	},
	disableKeyboardNav: function() {
		document.onkeydown = '';
	},
	keyboardAction: function(e) {
		if (e == null) {
			keycode = event.keyCode;
		}
		else {
			keycode = e.which;
		}
		key = String.fromCharCode(keycode).toLowerCase();
		if ((key == 'x') || (key == 'o') || (key == 'c')) {
			myLightbox.end();
		}
		else if (key == 'p') {
			if (activeImage != 0) {
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage - 1);
			}
		}
		else if (key == 'n') {
			if (activeImage != (imageArray.length - 1)) {
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage + 1);
			}
		}
	},
	preloadNeighborImages: function() {
		if ((imageArray.length - 1) > activeImage) {
			preloadNextImage = new Image();
			preloadNextImage.src = imageArray[activeImage + 1][0];
		}
		if (activeImage > 0) {
			preloadPrevImage = new Image();
			preloadPrevImage.src = imageArray[activeImage - 1][0];
		}
	},
	end: function() {
		this.disableKeyboardNav();
		Element.hide('lightbox');
		new Effect.Fade('overlay', {
			duration: 0.2
		});
		showSelectBoxes();
	}
}

function getPageScroll() {
	var yScroll;
	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	}
	else if (document.documentElement && document.documentElement.scrollTop) {
		yScroll = document.documentElement.scrollTop;
	}
	else if (document.body) {
		yScroll = document.body.scrollTop;
	}
	arrayPageScroll = new Array('',yScroll)
	return arrayPageScroll;
}

function getPageSize() {
	var xScroll, yScroll;
	if (window.innerHeight && window.scrollMaxY) {
		xScroll = document.body.scrollWidth;
		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) {
		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 = windowWidth;
	}
	else {
		pageWidth = xScroll;
	}
	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight)
	return arrayPageSize;
}

function getKey(e) {
	if (e == null) {
		keycode = event.keyCode;
	}
	else {
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	if (key == 'x') {
	}
}

function listenKey() {
	document.onkeypress = getKey;
}

function showSelectBoxes() {
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "visible";
	}
}

function hideSelectBoxes() {
	selects = document.getElementsByTagName("select");
	for (i = 0; i != selects.length; i++) {
		selects[i].style.visibility = "hidden";
	}
}

function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

function initLightbox() {
	myLightbox = new Lightbox();
}

Event.observe(window, 'load', initLightbox, false);