// -----------------------------------------------------------------
// neue klasse fuer die einbindung von inhalten
// als eine art layer ueber die eigentlichen 
// seiteninhalte ... based on lightscape
// 
// codet by ha:rdy from digital::now
//
// der gedanke hinter diesem script ist eine moeglichkeit,
// unterschiedliche inhalte nach dem vorbild von lightbox
// ueber einen bestehenden seiteninhalt zu legen. dieses
// script ist jedoch nicht nur fuer bilder sondern auch fuer
// die ausgabe von html-codes u.a. geeignet.
// -----------------------------------------------------------------

var overlayOpacity = 0.8;	// transparenz der schicht beim ueberblenden

var animate = true;		// inhalte koennten natuerlich nach dem vorbild von lightbox animiert eingeblendet angezeigt werden
var resizeSpeed = 7;	// ... wofuer auch dieser parameter noetig ist

var borderSize = 10;	// mal sehen, ob ich das ding zum schluss noch brauche

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

var linkArray = new Array;

if(animate == true){
	overlayDuration = 0.2;	// shadow fade in/out duration
	if(resizeSpeed > 10){ resizeSpeed = 10;}
	if(resizeSpeed < 1){ resizeSpeed = 1;}
	resizeDuration = (11 - resizeSpeed) * 0.15;
} else { 
	overlayDuration = 0;
	resizeDuration = 0;
}

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

//
//	Additional methods for Element added by SU, Couloir
//	- further additions by Lokesh Dhakar (huddletogether.com)
//
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,l) {
	   	element = $(element);
    	element.style.left = l +"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;
	}
});


// hier die eigentliche klasse:
var CoverOverAll = Class.create();

CoverOverAll.prototype = {
	
	initialize: function(){
		
		this.updateLinkList();
	
		var objBody = document.getElementsByTagName("body").item(0);
		
		var objOverlay = document.createElement("div");
		objOverlay.setAttribute('id','overlay');
		objOverlay.style.display = 'none';
		objOverlay.onclick = function() { myCover.end(); }
		objBody.appendChild(objOverlay);
		
		var objCover = document.createElement("div");
		objCover.setAttribute('id','cover');
		objCover.style.display = 'none';
		objCover.onclick = function(e) {
			if (!e) var e = window.event;
			var clickObj = Event.element(e).id;
			if ( clickObj == 'overlay') {
				myCover.end();
			}
		};
		objBody.appendChild(objCover);
			
		var objOuterCoverContainer = document.createElement("div");
		objOuterCoverContainer.setAttribute('id','outerCoverContainer');
		objCover.appendChild(objOuterCoverContainer);
		
		var arrayPageSize = getPageSize();
		
		if(animate){
			Element.setWidth('outerCoverContainer', (arrayPageSize[2]-300));
			Element.setHeight('outerCoverContainer', (arrayPageSize[3]-200));			
		} else {
			Element.setWidth('outerCoverContainer', 1);
			Element.setHeight('outerCoverContainer', 1);			
		}
		
		this.enableKeyboardNav();
	},
	
	//
	// updateLinkList()
	//
	updateLinkList: 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('dnoverlay')){
				anchor.onclick = function () {myCover.start(this); return false;}
			}
		}
	},
		
	//
	//	start()
	//
	start: function(overlayLink){	
	
		hideApplets();
		hideSelectBoxes();
		hideFlash();
		
		var arrayPageSize = getPageSize();
		Element.setWidth('overlay', arrayPageSize[0]);
		Element.setHeight('overlay', arrayPageSize[1]);
		
		new Effect.Appear('overlay', { duration: overlayDuration, from: 0.0, to: overlayOpacity });
		
		if(!document.getElementsByTagName) { return; }
		var anchors = document.getElementsByTagName( overlayLink.tagName );
		
		// test
		var arrayPageScroll = getPageScroll();
		var coverTop = arrayPageScroll[1] + (arrayPageSize[3] / 10);
		var coverLeft = arrayPageScroll[0];
		Element.setTop('cover', coverTop);
		Element.setLeft('cover', coverLeft);
		
		Element.show('cover');
		
		var ajax = new ajaxRequest(overlayLink);
		ajax.onSuccess = function(txt,xml){
			document.getElementById("outerCoverContainer").innerHTML=txt;
		}
		ajax.doRequest();
	},

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

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

	//
	//	keyboardAction()
	//
	keyboardAction: function(e) {
		if (e == null) { // ie
			keycode = event.keyCode;
			escapeKey = 27;
		} else { // mozilla
			keycode = e.keyCode;
			escapeKey = e.DOM_VK_ESCAPE;
		}

		key = String.fromCharCode(keycode).toLowerCase();
		
		if((key == 'x') || (key == 'o') || (key == 'c') || (keycode == escapeKey)){
			myCover.end();
		}
	},
	
	//
	//	end()
	//
	end: function() {
		Element.hide('cover');
		new Effect.Fade('overlay', { duration: overlayDuration});
		
		showApplets();
		showSelectBoxes();
		showFlash();
	}
}

// ---------------------------------------------------
function getPageScroll(){

	var xScroll, yScroll;

	if (self.pageYOffset) {
		yScroll = self.pageYOffset;
		xScroll = self.pageXOffset;
	} else if (document.documentElement && document.documentElement.scrollTop){	 // Explorer 6 Strict
		yScroll = document.documentElement.scrollTop;
		xScroll = document.documentElement.scrollLeft;
	} else if (document.body) {// all other Explorers
		yScroll = document.body.scrollTop;
		xScroll = document.body.scrollLeft;	
	}

	arrayPageScroll = new Array(xScroll,yScroll) 
	return arrayPageScroll;
}

function getPageSize(){
	
	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){ // 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;
	
//	console.log(self.innerWidth);
//	console.log(document.documentElement.clientWidth);

	if (self.innerHeight) {	// all except Explorer
		if(document.documentElement.clientWidth){
			windowWidth = document.documentElement.clientWidth; 
		} else {
			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;
	}

//	console.log("xScroll " + xScroll)
//	console.log("windowWidth " + windowWidth)

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

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

//
// getKey(key)
//
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; }

// ---------------------------------------------------
//
// hide and show java applets
// from Hartmut Kaestner [info@digital-now.de]
//
function showApplets(){
	var applets = document.getElementsByTagName("applet");
	for (i = 0; i != applets.length; i++) {
		applets[i].style.visibility = "visible";
	}
}

function hideApplets(){
	var applets = document.getElementsByTagName("applet");
	for (i = 0; i != applets.length; i++) {
		applets[i].style.visibility = "hidden";
	}
}

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

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

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

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

function showFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "visible";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "visible";
	}
}

function hideFlash(){
	var flashObjects = document.getElementsByTagName("object");
	for (i = 0; i < flashObjects.length; i++) {
		flashObjects[i].style.visibility = "hidden";
	}

	var flashEmbeds = document.getElementsByTagName("embed");
	for (i = 0; i < flashEmbeds.length; i++) {
		flashEmbeds[i].style.visibility = "hidden";
	}
}

// ---------------------------------------------------
function initCoverOverAll() { myCover = new CoverOverAll(); }
Event.observe(window, 'load', initCoverOverAll, false);