/*
	----------------------------------------------------------
	Modificato da Marco Liverani per Image Line(R) s.r.l., 2008-03-13
	NOTA: cerca la faccina [^_^] per individuare le modifiche
	----------------------------------------------------------
	
	Slimbox (Extended Version 1.3.1, 2007-02-21)
	by Yukio Arita (http://homepage.mac.com/yukikun/software/slimbox_ex/)
	Based on:
	Slimbox v1.3 - The ultimate lightweight Lightbox clone
	by Christophe Beyls (http://www.digitalia.be) - MIT-style license.
	Inspired by the original Lightbox v2 by Lokesh Dhakar.
*/


// [^_^] gestione label (title) in lingua
if(!sbNextLabel){var sbNextLabel = 'Avanti';}
if(!sbPrevLabel){var sbPrevLabel = 'Indietro';}
if(!sbCloseLabel){var sbCloseLabel = 'Chiudi';}
// [^_^]

var Lightbox = {
	init: function(options){
		this.options = Object.extend({
			resizeDuration: 400,
			resizeTransition: Fx.Transitions.sineInOut,
			initialWidth: 250,
			initialHeight: 250,
			animateCaption: true,
			defaultIframeWidth : 500, 
			defaultIframeHeight: 300
		}, options || {});

		if(window.ie6 && document.compatMode=="BackCompat"){
			this.options.animateCaption = false;
		}

		this.anchors = [];
		$each(document.links, function(el){
			if (el.rel && el.rel.test(/^lightbox/i)){
				el.onclick = this.click.pass(el, this);
				this.anchors.push(el);
			}
		}, this);
		this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
		this.eventPosition = this.position.bind(this);
		
		this.overlay = new Element('div').setProperty('id', 'lbOverlay').injectInside(document.body);
		
		this.center = new Element('div').setProperty('id', 'lbCenter').setStyles({width: this.options.initialWidth+'px', height: this.options.initialHeight+'px', marginLeft: '-'+(this.options.initialWidth/2)+'px', display: 'none'}).injectInside(document.body);
		this.canvas = new Element('div').setProperty('id', 'lbCanvas').injectInside(this.center);
		// [^_^] aggiunto il title
		// this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#'}).setStyle('display', 'none').injectInside(this.canvas);
		// this.nextLink = this.prevLink.clone().setProperty('id', 'lbNextLink').injectInside(this.canvas);
		this.prevLink = new Element('a').setProperties({id: 'lbPrevLink', href: '#', title: sbPrevLabel+' [<-]'}).setStyle('display', 'none').injectInside(this.canvas);
		this.nextLink = new Element('a').setProperties({id: 'lbNextLink', href: '#', title: sbNextLabel+' [->]'}).setStyle('display', 'none').injectInside(this.canvas);
		// [^_^]
		this.prevLink.onclick = this.previous.bind(this);
		this.nextLink.onclick = this.next.bind(this);

		this.bottomContainer = new Element('div').setProperty('id', 'lbBottomContainer').setStyle('display', 'none').injectInside(document.body);
		this.bottom = new Element('div').setProperty('id', 'lbBottom').injectInside(this.bottomContainer);
		// [^_^] aggiunto il title
		// new Element('a').setProperties({id: 'lbCloseLink', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
		this.closeLink = new Element('a').setProperties({id: 'lbCloseLink', href: '#', title: sbCloseLabel+' [ESC]'}).injectInside(this.bottom);
		this.closeLink.onclick = this.overlay.onclick = this.close.bind(this);
		// [^_^]
		this.caption = new Element('div').setProperty('id', 'lbCaption').injectInside(this.bottom);
		this.number = new Element('div').setProperty('id', 'lbNumber').injectInside(this.bottom);
		new Element('div').setStyle('clear', 'both').injectInside(this.bottom);

		var nextEffect = this.nextEffect.bind(this);
		this.fx = {
			overlay: this.overlay.effect('opacity', {duration: 500}).hide(),
			resizeCenter: this.center.effects({duration: this.options.resizeDuration, transition: this.options.resizeTransition, onComplete: nextEffect}),
			image: this.canvas.effect('opacity', {duration: 500, onComplete: nextEffect}),
			bottom: this.bottomContainer.effect('height', {duration: 400, onComplete: nextEffect})
		};

		this.preloadPrev = new Image();
		this.preloadNext = new Image();
	},

	click: function(link){
		if (link.rel.length == 8) return this.show(link.href, link.title, link.rev);

		var j, itemNumber, items = [];
		this.anchors.each(function(el){
			if (el.rel == link.rel){
				for (j = 0; j < items.length; j++) if(items[j][0] == el.href && items[j][2] == el.rev) break;
				if (j == items.length){
					// [^_^] gestire titolo, sottotitolo e link
					// items.push([el.href, el.title, el.rev]);
					var elTitle = el.title;
					if (elTitle.indexOf('::')>=0){
						var splitTitle = elTitle.split('::');
						elTitle = '<strong>' + splitTitle[0] + '</strong>';
						if (splitTitle[1]!=''){elTitle += '<br /><em>' + splitTitle[1] + '</em>';}
						if ((splitTitle.length>2)&&(splitTitle[2]!='')){
							elTitle += '<br /><a href="' + splitTitle[2] + '" target="_blank">Download...</a>';
						} else if ((el.name)&&(el.name!='')){
							elTitle += '<br /><a href="' + el.name + '" target="_blank">Download...</a>';
						}
					} else {
						elTitle = '<strong>' + elTitle + '</strong>';
						if ((el.name)&&(el.name!='')){
							elTitle += '<br /><a href="' + el.name + '" target="_blank">Download...</a>';
						}
					}
					items.push([el.href, elTitle, el.rev]);
					// [^_^]
					if (el.href == link.href && el.rev == link.rev) itemNumber = j;
				}
			}
		}, this);
		return this.open(items, itemNumber);
	},

	show: function(url, title, rev){
		return this.open([[url, title, rev]], 0);
	},

	open: function(items, itemNumber){
		this.items = items;
		this.position();
		this.setup(true);
		var wh = (window.getHeight() == 0) ? window.getScrollHeight() : window.getHeight();
		var st = document.body.scrollTop  || document.documentElement.scrollTop;
		this.top = st + (wh / 15);
		this.center.setStyles({top: this.top+'px', display: ''});
		this.fx.overlay.start(0.8);
		return this.changeItem(itemNumber);
	},

	position: function(){
		var ww = (window.getWidth() == 0) ? window.getScrollWidth()-22 : window.getWidth();
		var wh = (window.getHeight() == 0) ? window.getScrollHeight() : window.getHeight();
		var st = document.body.scrollTop  || document.documentElement.scrollTop;
		this.overlay.setStyles({top: st+'px', height: wh+'px', width:ww+'px'});
	},

	setup: function(open){
		var elements = $A(document.getElementsByTagName('object'));
		elements.extend(document.getElementsByTagName(window.ie ? 'select' : 'embed'));
		elements.each(function(el){
			if (open){
				el.lbBackupVisibility = el.style.visibility;
				el.lbBackupDisplay = el.style.display;
			}
			el.style.visibility = open ? 'hidden' : el.lbBackupVisibility;
			el.style.display = open ? 'none' : el.lbBackupDisplay;
		});

		var fn = open ? 'addEvent' : 'removeEvent';
		window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
		document[fn]('keydown', this.eventKeyDown);
		this.step = 0;
	},

	keyboardListener: function(event){
		switch (event.keyCode){
			// [^_^]
			// case 88: [X] case 67: [C]
			case 27: if(!this.preload.modal){this.close();} break;	// [ESC]
			// case 80: [P]
			case 37: this.previous(); break;	// [<-]
			// case 78: [N]
			case 39: this.next(); break;	// [->]
			// [^_^]
		}
	},

	previous: function(){
		return this.changeItem(this.activeItem-1);
	},

	next: function(){
		return this.changeItem(this.activeItem+1);
	},

	changeItem: function(itemNumber){
		if (this.step || (itemNumber < 0) || (itemNumber >= this.items.length)) return false;
		this.step = 1;
		this.activeItem = itemNumber;

		this.bottomContainer.style.display = this.prevLink.style.display = this.nextLink.style.display = 'none';
		this.fx.image.hide();
		this.center.className = 'lbLoading';

		this.removeCurrentItem();
		
		var url = this.items[this.activeItem][0];
		var rev = this.items[this.activeItem][2];
		
		// [^_^]
		var ww = (window.getWidth() == 0) ? window.getScrollWidth()-22 : window.getWidth();
		var wh = (window.getHeight() == 0) ? window.getScrollHeight() : window.getHeight();
		// [^_^]
		
		var re_imageURL = /\.(jpe?g|png|gif|bmp)/i;
		if (url.match(re_imageURL)){
			this.preload = new Image();
			this.preload.datatype = 'image';
			// [^_^] gestione attributo 'rev' (width, height, modal, callback) non definito
			this.preload.w = -1;
			this.preload.h = -1;
			this.preload.modal = false;
			this.preload.callback = false;
			this.preload.fullscreen = false;
			if (rev){
				this.preload.w = this.matchOrDefault(rev, new RegExp("width=(\\d+%?)", "i"), -1);
				this.preload.h = this.matchOrDefault(rev, new RegExp("height=(\\d+%?)", "i"), -1);
				this.preload.modal = this.matchOrDefault(rev, new RegExp("modal=(true||false)", "i"), false);
				this.preload.callback = this.matchOrDefault(rev, new RegExp("callback=([a-zA-Z0-9]+)", "i"), false);
				this.preload.fullscreen = this.matchOrDefault(rev, new RegExp("fullscreen=(true||false)", "i"), false);
				if (this.preload.fullscreen){
					this.preload.w = ww-120;
					this.preload.h = wh-150;
				}
			}
			// [^_^]
			this.preload.onload = this.nextEffect.bind(this);
			this.preload.src = url;
		}else{
			this.preload = new Object();
			this.preload.datatype = 'iframe';
			// [^_^] gestione attributo 'rev' (width, height, modal, callback) non definito
			this.preload.w = -1;
			this.preload.h = -1;
			this.preload.modal = false;
			this.preload.callback = false;
			this.preload.fullscreen = false;
			if (rev){
				this.preload.w =  this.matchOrDefault(rev, new RegExp("width=(\\d+)", "i"), this.options.defaultIframeWidth);
				this.preload.h = this.matchOrDefault(rev, new RegExp("height=(\\d+)", "i"), this.options.defaultIframeHeight);
				this.preload.modal = this.matchOrDefault(rev, new RegExp("modal=(true||false)", "i"), false);
				this.preload.callback = this.matchOrDefault(rev, new RegExp("callback=([a-zA-Z0-9]+)", "i"), false);
				this.preload.fullscreen = this.matchOrDefault(rev, new RegExp("fullscreen=(true||false)", "i"), false);
				if (this.preload.fullscreen){
					this.preload.w = ww-120;
					this.preload.h = wh-150;
				}
			}
			// [^_^]
			this.preload.src = url;
			this.nextEffect();
		}
		
		return false;
	},

	nextEffect: function(){
		switch (this.step++){
		case 1:
			this.center.className = '';
			
			// [^_^] gestione slimbox come finestra modale
			if (this.preload.modal){
				this.overlay.onclick = this.closeLink.onclick = '';
				this.overlay.style.cursor = 'default';
				this.closeLink.style.display = 'none';
			}else{
				this.overlay.onclick = this.closeLink.onclick = this.close.bind(this);
				this.overlay.style.cursor = 'pointer';
				this.closeLink.style.display = '';
			}
			// [^_^]
			
			if (this.preload.datatype == 'image'){
				var ws = (this.preload.w == -1) ? this.preload.width.toString() : this.preload.w.toString();
				var hs = (this.preload.h == -1) ? this.preload.height.toString() : this.preload.h.toString();
				this.p_width = ( q = ws.match(/(\d+)%/) ) ? q[1] * this.preload.width * 0.01 : ws;
				this.p_height = ( q = hs.match(/(\d+)%/) ) ? q[1] * this.preload.height * 0.01 : hs;
				new Element('img').setProperties({id: 'lbImage', src:this.preload.src, width:this.p_width, height:this.p_height}).injectInside(this.canvas);
				this.nextLink.style.right = '';
			}else{
				this.p_width = this.preload.w;
				this.p_height = this.preload.h;
				this.iframeId = "lbFrame_"+new Date().getTime();
				new Element('iframe').setProperties({id: this.iframeId, width: this.p_width, height: this.p_height, frameBorder:0, scrolling:'auto', src:this.preload.src}).injectInside(this.canvas);
				this.nextLink.style.right = '25px';
			}
			this.canvas.style.width = this.bottom.style.width = this.p_width+'px';
			this.canvas.style.height = this.prevLink.style.height = this.nextLink.style.height = this.p_height+'px';

			this.caption.setHTML(this.items[this.activeItem][1] || '');
			this.number.setHTML((this.items.length == 1) ? '' : (this.activeItem+1) + '/' + this.items.length);

			if (this.activeItem) this.preloadPrev.src = this.items[this.activeItem-1][0];
			if (this.activeItem != (this.items.length - 1)) this.preloadNext.src = this.items[this.activeItem+1][0];
			if (this.center.clientHeight != this.canvas.offsetHeight){
				var oh = (this.p_height == this.canvas.clientHeight) ? this.canvas.offsetHeight : eval(this.p_height)+18; // fix for ie
				this.fx.resizeCenter.start({height: oh});
				break;
			}

			this.step++;
		case 2:
			if (this.center.clientWidth != this.canvas.offsetWidth){
				var ow = (this.p_width == this.canvas.clientWidth) ? this.canvas.offsetWidth : eval(this.p_width)+18; // fix for ie
				this.fx.resizeCenter.start({width: ow, marginLeft: -ow/2});
				break;
			}
			this.step++;
		case 3:
			this.bottomContainer.setStyles({top: (this.top + this.center.clientHeight)+'px', height:'0px', marginLeft: this.center.style.marginLeft, width:this.center.style.width, display: ''});
			this.fx.image.start(1);
			break;
		case 4:
			if (this.options.animateCaption){
				this.fx.bottom.start(0,this.bottom.offsetHeight+10);
				break;
			}
			this.bottomContainer.style.height = (this.bottom.offsetHeight+10)+'px';
		case 5:
			if (this.activeItem){
				this.prevLink.style.display = '';
			}
			if (this.activeItem != (this.items.length - 1)){
				this.nextLink.style.display = '';
			}
			this.step = 0;
		}
	},

	close: function(){
		// [^_^] gestione funzione di callback
		this.callback = this.preload.callback;
		// [^_^]
		if (this.step < 0) return;
		this.step = -1;
		this.removeCurrentItem();
		for (var f in this.fx) this.fx[f].stop();
		this.center.style.display = this.bottomContainer.style.display = 'none';
		this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
		// [^_^] gestione funzione di callback
		if (this.callback){
			eval(this.callback+'()');
		}
		// [^_^]
		return false;
	},

	removeCurrentItem: function(){
		if (this.preload){
			if( this.preload.datatype == 'image' ) {
				$('lbImage').remove();
				this.preload.onload = Class.empty;
			}else{
				$(this.iframeId).remove();
			}
			this.preload = null;
		}		
	},

	matchOrDefault: function(str, re, val){
		var hasQuery = str.match(re);
		return hasQuery ? hasQuery[1] : val;
	}

};

//window.addEvent('domready', Lightbox.init.bind(Lightbox));
window.addEvent('load', Lightbox.init.bind(Lightbox));