// -----------------------------------------------------------------------------------
//
//	Dview v 1.0 for prototype 1.6.0.3/scriptaculous 1.8.1 with effects,builder
//	by Dariusz Burak - 
//	Last Modification 16.09.2009 
//	For more information Visit
	
//	Based On: 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.
//	
//
// -----------------------------------------------------------------------------------
//
//	you can use Dview for :
//
//	displaying an image, just place a link to an image with attribute re="lightbox" on it
//	ex. <a href="../images/image1/jpg" rel="lightbox" title="image 1">Image 1</a>

//  displaying a google map in a lightbox,  
//	ex. <a href="http://maps.google.co.uk/maps?f=q&source=s_q&hl=en&q=latitude,longitude&z=16" rel="lightbox map" title="my map">My map</a>
	 
//	or to display any content you like. Just use param rel="lightbox custom" and a callback param in href
//	if not linking anywhere just use href="?callback=showWeather"
//	ex. <a href="anylink.html?callback=MyFunction" rel="lightbox custom" title="Content label">click here to see custom Content</a>
//
//	function MyFunction(){
//    $('customCanvas').update('my content');
//	}
//  Configuration
//
	var customConfig = new Object();
		customConfig.width = 600;
		customConfig.height = 520;
		customConfig.Cclass = 'customCanvas';
	var urlVars = new Array();	     
//
//  Place your custom functions here
//  to access GET variables use urlVars array  { ex.urlVars.VARNAME }
//
//  showMap()
//	
    function showMap(){
    	var latlng = new google.maps.LatLng( customConfig.Lat, customConfig.Lon );
	    var myOptions = {
	      zoom: 16,
	      center: latlng,
		  navigationControl: true,	
	      mapTypeId: google.maps.MapTypeId.HYBRID
	    };
        (function(){
        if(google.maps){
			var map = new google.maps.Map( $('customCanvas'), myOptions);
			var marker = new google.maps.Marker({
			  position: latlng,
			  map: map
			}); 
		}			
		}).delay(0.6);	    
    }
    
//
//  ---Main class---
//     
LightboxOptions = Object.extend({
    fileLoadingImage:        '../../images/lightbox/loading.gif',     
    fileBottomNavCloseImage: '../../images/lightbox/closelabel.gif',
    overlayOpacity: 0.8,   // controls transparency of shadow overlay
    animate: true,         // toggles resizing animations
    resizeSpeed: 0.4,      // controls the speed of the image resizing animations (1=slowest and 10=fastest)
    fadeSpeed : 0.3,
    borderSize: 10,        //if you adjust the padding in the CSS, you will need to update this variable

	// When grouping images this is used to write: Image # of #.
	// Change it for non-english localization
	labelImage: "Image",
	labelOf: "of"
}, window.LightboxOptions || {});

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

var Lightbox = Class.create();

Lightbox.prototype = {
    imageArray: [],
    activeImage: undefined,
        
    // initialize()
    // Constructor runs on completion of the DOM loading. Calls updateImageList and then
    // the function inserts html at the bottom of the page which is used to display the shadow 
    // overlay and the image container.
    //
    initialize: function() {    
        
        this.updateImageList();
        
        this.keyboardAction = this.keyboardAction.bindAsEventListener(this);

	    this.resizeDuration = LightboxOptions.animate ? LightboxOptions.resizeSpeed : 0;
	    this.overlayDuration = LightboxOptions.animate ? 0.2 : 0;  // shadow fade in/out duration

        var size = (LightboxOptions.animate ? 150 : 1) + 'px';
        var scroll='';
		var lightboxTop=0;
		
        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',{className:'top'}, [
	               Builder.node('div',{className:'l'}),
	               Builder.node('div',{className:'r'}),
	               Builder.node('div',{className:'c'}),
		        ]),               
		             
                Builder.node('div',{id:'imageContainer'}, [
                	Builder.node('div',{id:'arrowLeft',style:'left:0px;'}),
		        	Builder.node('div',{id:'arrowRight',style:'right:0px;'}),
                    Builder.node('div',{style:'background-color:#FFF;'},[
                    	Builder.node('img',{id:'lightboxImage'}),
			    		Builder.node('div',{id:'customCanvas', className: customConfig.Cclass})                    	
                    ]),
                    
	                	Builder.node('div',{id:'imageData'}, [
		                    Builder.node('div',{id:'imageDetails'}, [
		                        Builder.node('span',{id:'caption'}),
		                        Builder.node('span',{id:'numberDisplay'})
		                    ]),
			                Builder.node('div',{id:'bottomNav'},
			                      Builder.node('a',{id:'bottomNavClose', href: '#' },
			                          Builder.node('img', { src: LightboxOptions.fileBottomNavCloseImage })
			                      )
			                  ),
	                  		Builder.node('div',{style:'clear:both;'})
		                ]),                	

                    
                     
                    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',{className:'bot'}, [
	               Builder.node('div',{className:'l'}),
	               Builder.node('div',{className:'r'}),
	               Builder.node('div',{className:'c'}),
		        ]),                    
            ])
        ]));


		$('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));
		$('prevLink').observe('mouseover', (function() {this.showArrow('arrowLeft'); }).bind(this));
		$('prevLink').observe('mouseout', (function() {this.hideArrow('arrowLeft'); }).bind(this));		
		$('nextLink').observe('click', (function(event) { event.stop(); this.changeImage(this.activeImage + 1); }).bindAsEventListener(this));
		$('nextLink').observe('mouseover', (function() {this.showArrow('arrowRight'); }).bind(this));
		$('nextLink').observe('mouseout', (function() {this.hideArrow('arrowRight'); }).bind(this));		

		$('loadingLink').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		$('bottomNavClose').observe('click', (function(event) { event.stop(); this.end(); }).bind(this));
		
        var th = this;
        (function(){
            var ids = 
                'overlay imageData lightbox outerImageContainer imageContainer lightboxImage customCanvas hoverNav prevLink nextLink loading loadingLink ' + 
                'caption numberDisplay bottomNav bottomNavClose';   
            $w(ids).each(function(id){ th[id] = $(id); });
        }).defer();
    },

	  //
	  // getUrlVars()
      // Loops through url string, reading GET parameters and returns it  
      // as an associative array.
      //
      getUrlVars: function(url){
	      var vars = [], hash;
	      var hashes = url.slice(url.indexOf('?') + 1).split('&');
	      for(var i = 0; i < hashes.length; i++)
	      {
		      hash = hashes[i].split('=');
		      vars.push(hash[0]);
		      vars[hash[0]] = hash[1];
	      }
	      return vars;
      },

    //
    // updateImageList()
    // Loops through anchor tags looking for 'lightbox' references and applies onclick
    // events to appropriate links. You can rerun after dynamically adding images w/ajax.
    //
    showArrow: function (obj){
		var pos=obj.sub('arrow', '');
		var x=eval('$(\''+obj+'\').style.margin'+pos).sub('px', '');
		$(obj).show();
    	if(x<=0 && x>-23){
	    	this.scroll = new Effect.Morph(obj, {
  				style: 'margin-'+pos+':-23px;',
  				duration: 0.3
			});
		}
    },

    hideArrow: function (obj){
		var pos=obj.sub('arrow', '');
		var x=eval('$(\''+obj+'\').style.margin'+pos).sub('px', '');
    	if(x>=-23){
	    	this.scroll = new Effect.Morph(obj, {
  				style: 'margin-'+pos+':0px;',
  				duration: 0.3 
			});
		}
 	},
        
    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()
    //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
    //
    start: function(imageLink) {    
        $$('select', 'object', 'embed').each(function(node){ node.style.visibility = 'hidden' });

        // stretch overlay to fill page and fade in
        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')){
            // if image is NOT part of a set, add single image to imageArray
            this.imageArray.push([imageLink.href, imageLink.title]);         
        } else {
            // if image is part of a set..
            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++; }
        }

        // calculate top and left offset for the lightbox 
        var arrayPageScroll = document.viewport.getScrollOffsets();
        lightboxTop = arrayPageScroll[1] + (document.viewport.getHeight() / 2)-75;
        var lightboxLeft = arrayPageScroll[0];
        this.imageContainer.hide();
        this.lightbox.setStyle({ top: lightboxTop + 'px', left: lightboxLeft + 'px' }).show();

		var ifImage = (imageLink.rel == 'lightbox' ? true :false);
        this.changeImage(imageNum, imageLink.rel);
    },

    //
    //  changeImage()
    //  Hide most elements and preload image in preparation for resizing image container.
    //
    changeImage: function(imageNum, rel) {   
        
        this.activeImage = imageNum; // update global var

        // hide elements during transition
 //       if (LightboxOptions.animate) this.loading.show();

        this.hoverNav.hide();
        this.prevLink.hide();
        this.nextLink.hide();
		// HACK: Opera9 does not currently support scriptaculous opacity and appear fx
        //this.numberDisplay.hide();      
		new Effect.Parallel([
	        new Effect.Fade($('arrowLeft')),
	       	new Effect.Fade($('arrowRight')),
	       	new Effect.Fade(this.imageContainer)
			], { 
			  duration: LightboxOptions.fadeSpeed,
			  transition: Effect.Transitions.sinoidal,
	          afterFinish: (function(){
			    if(rel != 'lightbox'){
					this.customCanvas.update('');			    
			    	this.customCanvas.addClassName('loading');
			    	
			   		urlVars = this.getUrlVars(this.imageArray[this.activeImage][0]);    	
					if(rel == 'lightbox map'){
						this.loadMap();
					}else{
						this.lightboxImage.hide();
            			eval(urlVars.callback+'();');
            			this.customCanvas.show();          			
            		}
            		this.resizeImageContainer(customConfig.width, customConfig.height);	
            		this.customCanvas.removeClassName('loading');
			    }else{
 				  this.lightboxImage.show();
 				  this.customCanvas.hide();			    
	              var imgPreloader = new Image();
	        	  // once image is preloaded, resize image container
	        	  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];
				}
	        	 
	          }).bind(this)  	  
		});
    },
  
	      
    //
    //  Place your custom functions here
    //  to access GET variables use urlVars array  { ex.urlVars.VARNAME }
    //

	loadMap: function(){
		tmp = urlVars.q.split(',');
		customConfig.width = 600;
		customConfig.height = 520;		
		customConfig.Lat = tmp[0];
		customConfig.Lon = tmp[1];
		this.lightboxImage.hide();
		this.customCanvas.show();		
	    var script = document.createElement("script");
	    script.type = "text/javascript";
	    script.src = "http://maps.google.com/maps/api/js?sensor=false&callback=showMap";
	    document.body.appendChild(script);
	},
	
    //
    //  resizeImageContainer()
    //
    resizeImageContainer: function(imgWidth, imgHeight) {
        // get current width and height
        var widthCurrent  = this.outerImageContainer.getWidth();
        var heightCurrent = this.outerImageContainer.getHeight();

        // get new width and height
        var widthNew  = (imgWidth  + LightboxOptions.borderSize * 2);
        var heightNew = (imgHeight + 22 + LightboxOptions.borderSize * 2);
       	var hDiff = heightCurrent - heightNew;
		var wDiff = widthCurrent - widthNew;

		if(hDiff != 0 || wDiff != 0){
			new Effect.Parallel([
				new Effect.Move('outerImageContainer', {
				  sync: true,
				  y: hDiff/2
				}),
				new Effect.Morph('outerImageContainer', {
				  style: 'width:'+widthNew+'px;height:'+heightNew+'px;',
	   			  sync:true
				})
	
				], { 
				  duration: this.resizeDuration,
				  transition: Effect.Transitions.sinoidal,
				  afterFinish:(function(){ this.showImage(); }).bind(this)	  
			});
		}else{
			this.showImage();
		}

        // if new and old image are same size and no scaling transition is necessary, 
        // do a quick pause to prevent image flicker.
        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' });
        }).bind(this).delay(timeout / 1000);
    },
    
    //
    //  showImage()
    //  Display image and begin preloading neighbors.
    //
    showImage: function(){
        this.loading.hide();
        this.imageData.show();
        this.updateDetails();
        this.imageContainer.show();
        this.preloadNeighborImages();
    },

    //
    //  updateDetails()
    //  Display caption, image number, and bottom nav.
    //
    updateDetails: function() {
    
        // if caption is not null
        if (this.imageArray[this.activeImage][1] != ""){
            this.caption.update(this.imageArray[this.activeImage][1]).show();
        }
        
        // if image is part of set display 'Image x of x' 
        if (this.imageArray.length > 1){
            this.numberDisplay.update( LightboxOptions.labelImage + ' ' + (this.activeImage + 1) + ' ' + LightboxOptions.labelOf + '  ' + this.imageArray.length).show();
        }

        // update overlay size and update nav
        var arrayPageSize = this.getPageSize();
        this.overlay.setStyle({ height: arrayPageSize[1] + 'px' });
        this.updateNav();

    },

    //
    //  updateNav()
    //  Display appropriate previous and next hover navigation.
    //
    updateNav: function() {

        this.hoverNav.show();               

        // if not first image in set, display prev image button
        if (this.activeImage > 0) this.prevLink.show();

        // if not last image in set, display next image button
        if (this.activeImage < (this.imageArray.length - 1)) this.nextLink.show();
        
        this.enableKeyboardNav();
    },

    //
    //  enableKeyboardNav()
    //
    enableKeyboardNav: function() {
        document.observe('keydown', this.keyboardAction); 
    },

    //
    //  disableKeyboardNav()
    //
    disableKeyboardNav: function() {
        document.stopObserving('keydown', this.keyboardAction); 
    },

    //
    //  keyboardAction()
    //
    keyboardAction: function(event) {
        var keycode = event.keyCode;

        var escapeKey;
        if (event.DOM_VK_ESCAPE) {  // mozilla
            escapeKey = event.DOM_VK_ESCAPE;
        } else { // ie
            escapeKey = 27;
        }

        var key = String.fromCharCode(keycode).toLowerCase();
        
        if (key.match(/x|o|c/) || (keycode == escapeKey)){ // close lightbox
            this.end();
        } else if ((key == 'p') || (keycode == 37)){ // display previous image
            if (this.activeImage != 0){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage - 1);
            }
        } else if ((key == 'n') || (keycode == 39)){ // display next image
            if (this.activeImage != (this.imageArray.length - 1)){
                this.disableKeyboardNav();
                this.changeImage(this.activeImage + 1);
            }
        }
    },

    //
    //  preloadNeighborImages()
    //  Preload previous and next images.
    //
    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()
    //
    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' });
    },

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

		return [pageWidth,pageHeight];
	}
};

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