// -----------------------------------------------------------------------------------
//
//	Lightbox v2.02
//	by Lokesh Dhakar - http://www.huddletogether.com
//	3/31/06
//
//	For more information on this script, visit:
//	http://huddletogether.com/projects/lightbox2/
//
//	Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//	
//	Credit also due to those who have helped, inspired, and made their code available to the public.
//	Including: Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.org), Thomas Fuchs(mir.aculo.us), and others.
//
//
// -----------------------------------------------------------------------------------

var fileLoadingImage = "imagens/lay1/loading.gif";		
var fileBottomNavCloseImage = "images/closelabel.gif";

var resizeSpeed = 7;	// controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 0;	//if you adjust the padding in the CSS, you will need to update this variable


//	Global Variables
//
var imageArray = new Array;
var activeImage;
var intSlideShow;
var timeTotalEffect;
var totalSlideShow = 0;
var objStart;

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";
	},
	setLeft: function(element,t) {
	   	element = $(element);
    	element.style.left = 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');

		var temp = false;
		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'))){
				if (temp == false) {
					objStart = anchor;
					temp = true;
				}
				anchor.onclick = function () {myLightbox.start(this); return false;}
			}
		}
		if (temp == false) 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.slideShow(0); return false; }
		objBody.appendChild(objOverlay);
		
		var objContImg = $('cont_img');
		objContImg.innerHTML = "";
		
		var objLightbox = document.createElement("div");
		objLightbox.setAttribute('id','lightbox');
		objLightbox.style.display = 'none';
		objContImg.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 objMascaraImagem = document.createElement("div");
		objMascaraImagem.setAttribute('id','mascaraImagem');
		objOuterImageContainer.appendChild(objMascaraImagem);

		var objImageData = document.createElement("div");
		objImageData.setAttribute('id','imageData');
		objImageData.style.display = 'none';
		objImageContainer.appendChild(objImageData);
	
		var objLoading = document.createElement("div");
		objLoading.setAttribute('id','loading');
		objLoading.innerHTML = "carregando...";
		objImageContainer.appendChild(objLoading);

		$('slideShow').onclick = function () { myLightbox.slideShow(1);return false; }
		
		//this.start(objStart);
	},
	
	start: function(imageLink) {	
		hideSelectBoxes();

		// stretch overlay to fill page and fade in
		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');

		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'),anchor));
			}
		}
		imageArray.removeDuplicates();
		while(imageArray[imageNum][0] != imageLink.getAttribute('href')) { imageNum++;}


		var arrayPageSize = getPageSize();
		var arrayPageScroll = getPageScroll();
		var lightboxTop = 0;

		Element.show('lightbox');
		
		if(arguments[1] == "slide") {
			this.slideShow(imageNum-1);
			stop();
		}
		this.changeImage(imageNum);
	},

	changeImage: function(imageNum) {
		
		if (imageNum >= imageArray.length)
			activeImage = imageNum = 0;
		else
			activeImage = imageNum;	// update global var

		for (var i=0; i<imageArray.length; i++) {
			if (i == activeImage)
				imageArray[i][2].parentNode.className = 'on';
			else
				Element.removeClassName(imageArray[i][2].parentNode,'on');
		}

		if (posScroll > imageArray[imageNum][2].parentNode.offsetTop)
			rolaThumbs(0,imageArray[imageNum][2].parentNode.offsetTop);
		if((posScroll+$('cont_thumbs').offsetHeight) < (imageArray[imageNum][2].parentNode.offsetTop+imageArray[imageNum][2].parentNode.offsetHeight))
			rolaThumbs(0,(imageArray[imageNum][2].parentNode.offsetTop+imageArray[imageNum][2].parentNode.offsetHeight-$('cont_thumbs').offsetHeight));

		Element.show('overlay');
		Element.show('loading');
		Element.hide('lightboxImage');
		
		imgPreloader = new Image();
		
		imgPreloader.onload=function(){
			Element.setSrc('lightboxImage', imageArray[activeImage][0]);
			if (typeof(myLightbox) == "undefined") {
				//this.changeImage(imageNum);
				//alert("merda");
				//var myLightbox = new Lightbox();
				//var myLightbox;
				//myLightbox = new Lightbox();
				//alert(imageArray[0][2]);
				//myLightbox.start(imageArray[0][2]);
				//return false;
				Element.hide('overlay');
			}
			else
				myLightbox.resizeImageContainer(imgPreloader.width, imgPreloader.height);
		}
		imgPreloader.src = imageArray[activeImage][0];
		totalSlideShow++;
	},

	resizeImageContainer: function( imgWidth, imgHeight) {
		this.wCur = Element.getWidth('outerImageContainer');
		this.hCur = Element.getHeight('outerImageContainer');

		if(totalSlideShow > 5) {
			totalSlideShow = 0;
			var tmp_left = (Element.getWidth('cont_img')-this.wCur) / 2;
			var tmp_top = (Element.getHeight('cont_i\mg')-this.hCur) / 2;
			Element.setTop('outerImageContainer', tmp_top);
			Element.setLeft('outerImageContainer', tmp_left);
		}

		// scalars based on change from old to new
		this.xScale = ((imgWidth  + (borderSize * 2)) / this.wCur) * 100;
		this.yScale = ((imgHeight  + (borderSize * 2)) / this.hCur) * 100;

		// calculate size difference between new and old image, and resize if necessary
		wDiff = (this.wCur - 12) - imgWidth;
		hDiff = (this.hCur - 12) - imgHeight;

		timeTotalEffect = 0;
		if(!( hDiff == 0)){ new Effect.Scale('outerImageContainer', this.yScale, {scaleX:false, duration:resizeDuration, scaleContent:false, scaleFromCenter:true}); timeTotalEffect += resizeDuration; }
		if(!( wDiff == 0)){ new Effect.Scale('outerImageContainer', this.xScale, {scaleY:false, delay:resizeDuration, duration:resizeDuration, scaleContent:false, scaleFromCenter:true}); timeTotalEffect += resizeDuration; }
		timeTotalEffect = (timeTotalEffect+0.5)*1000;
		setTimeout(function() { Element.hide('overlay'); }, timeTotalEffect);

		if((hDiff == 0) && (wDiff == 0)){
			if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
		}

		this.showImage();
	},
	
	showImage: function(){
		Element.hide('loading');
		myLightbox.updateDetails();
		new Effect.Appear('lightboxImage', { duration: 0.5, queue: 'end'});
		this.preloadNeighborImages();
	},

	updateDetails: function() {
		myLightbox.updateData();
		myLightbox.updateNav();
	},

	updateData: function() {
		var url = "inc_site/ac_legenda.php";
		var params = "img=" + imageArray[activeImage][0];
	
		var ajax = new Ajax.Request(url, {method: 'get', parameters:params, asynchronous:true,
					onComplete:function(t) {
								var result = t.responseText;
								if (result.length < 4) {
									$("imageData").style.display="none";
									$('imageData').innerHTML = "";
									$('outerImageContainer').onmouseover = function() { return false; }
									$('outerImageContainer').onmouseout = function() { return false; }
								}
								else {
									$('imageData').innerHTML = t.responseText;
									$('outerImageContainer').onmouseover = function() { $("imageData").style.display="block"; return false; }
									$('outerImageContainer').onmouseout = function() { $("imageData").style.display="none"; return false; }
								}
					}});
	},
	
	updateNav: function() {
		if(activeImage != 0){
			document.getElementById('prevLink').onclick = function() {
				myLightbox.changeImage(activeImage - 1); return false;
			}
		}
		else { document.getElementById('prevLink').onclick = function() { return false; } }
		if(activeImage != (imageArray.length - 1)){
			document.getElementById('nextLink').onclick = function() {
				myLightbox.changeImage(activeImage + 1); return false;
			}
		}
		else { document.getElementById('nextLink').onclick = function() { return false; } }
	},
	
	slideShow: function(ac) {
		if (ac == 1) {
			myLightbox.changeImage(activeImage + 1);
			intSlideShow = window.setInterval(function() { myLightbox.changeImage(activeImage + 1); },timeTotalEffect+3000);					
			$('slideShow').onclick = function() { myLightbox.slideShow(0); return false; };
			$('slideShow').className = 'on';
		}
		else {
			$('slideShow').onclick = function() { myLightbox.slideShow(1); return false; }
			clearInterval(intSlideShow);
			$('slideShow').className = '';
		}
	},

	enableKeyboardNav: function() {
		document.onkeydown = this.keyboardAction; 
	},

	disableKeyboardNav: function() {
		document.onkeydown = '';
	},

	keyboardAction: function(e) {
		if (e == null) { // ie
			keycode = event.keyCode;
		} else { // mozilla
			keycode = e.which;
		}

		key = String.fromCharCode(keycode).toLowerCase();
		
		if((key == 'x') || (key == 'o') || (key == 'c')){	// close lightbox
			myLightbox.end();
		} else if(key == 'p'){	// display previous image
			if(activeImage != 0){
				myLightbox.disableKeyboardNav();
				myLightbox.changeImage(activeImage - 1);
			}
		} else if(key == 'n'){	// display next image
			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();
		showSelectBoxes();
	}
}

function getPageScroll(){

	var yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
	} else if (document.body) {// all other Explorers
		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){ // all but Explorer Mac
		xScroll = document.body.scrollWidth;
		yScroll = document.body.scrollHeight;
	} else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
		xScroll = document.body.offsetWidth;
		yScroll = document.body.offsetHeight;
	}
	
	var windowWidth, windowHeight;
	if (self.innerHeight) {	// all except Explorer
		windowWidth = self.innerWidth;
		windowHeight = self.innerHeight;
	} else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
		windowWidth = document.documentElement.clientWidth;
		windowHeight = document.documentElement.clientHeight;
	} else if (document.body) { // other Explorers
		windowWidth = document.body.clientWidth;
		windowHeight = document.body.clientHeight;
	}	
	
	// for small pages with total height less then height of the viewport
	if(yScroll < windowHeight){
		pageHeight = windowHeight;
	} else { 
		pageHeight = yScroll;
	}

	// for small pages with total width less then width of the viewport
	if(xScroll < windowWidth){	
		pageWidth = windowWidth;
	} else {
		pageWidth = xScroll;
	}


	arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
	return arrayPageSize;
}

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

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
	if (e == null) { // ie
		keycode = event.keyCode;
	} else { // mozilla
		keycode = e.which;
	}
	key = String.fromCharCode(keycode).toLowerCase();
	
	if(key == 'x'){
	}
}

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

//
// listenKey()
//
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";
	}
}

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

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
	var now = new Date();
	var exitTime = now.getTime() + numberMillis;
	while (true) {
		now = new Date();
		if (now.getTime() > exitTime)
			return;
	}
}

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

function isDefined( variable) { return (typeof(variable) == "undefined") ?  false : true; }


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