/* ------------------------------------------------------------------------
	Class: prettyPhoto
	Use: Lightbox clone for jQuery
	Author: Stephane Caron (http://www.no-margin-for-errors.com)
	Version: 2.2.1
------------------------------------------------------------------------- */

jQuery.fn.prettyPhoto = function(settings) {
	// global Variables
	var isSet = false; /* Total position in the array */
	var setCount = 0; /* Total images in the set */
	var setPosition = 0; /* Position in the set */
	var arrayPosition = 0; /* Total position in the array */
	var hasTitle = false;
	var caller = 0;
	var doresize = true;
	var imagesArray = [];

	jQuery(window).scroll(function(){ _centerPicture(); });
	jQuery(window).resize(function(){ _centerPicture(); _resizeOverlay(); });
	jQuery(document).keyup(function(e){
		switch(e.keyCode){
			case 37:
				if (setPosition == 1) return;
				changePicture('previous');
				break;
			case 39:
				if (setPosition == setCount) return;
				changePicture('next');
				break;
			case 27:
				close();
				break;
		};
    });

	settings = jQuery.extend({
		animationSpeed: 'normal', /* fast/slow/normal */
		padding: 40, /* padding for each side of the picture */
		opacity: 0.35, /* Value betwee 0 and 1 */
		showTitle: true, /* true/false */
		allowresize: true /* true/false */
	}, settings);

	jQuery(this).each(function(){
		imagesArray[imagesArray.length] = this;
		jQuery(this).bind('click',function(){
			open(this); return false;
		});
	});

	function open(el) {
		caller = jQuery(el);
	
		// Find out if the picture is part of a set
		theRel = jQuery(caller).attr('rel');
		galleryRegExp = /\[(?:.*)\]/;
		theGallery = galleryRegExp.exec(theRel);
	
		// Find out the type of content
		contentType = "image";
		if(jQuery(caller).attr('href').indexOf('.swf') > 0){ hasTitle = false; contentType = 'flash'; };
	
		// Calculate the number of items in the set, and the position of the clicked picture.
		isSet = false;
		setCount = 0;
		for (i = 0; i < imagesArray.length; i++){
			if(jQuery(imagesArray[i]).attr('rel').indexOf(theGallery) != -1){
				setCount++;
				if(setCount > 1) isSet = true;

				if(jQuery(imagesArray[i]).attr('href') == jQuery(el).attr('href')){
					setPosition = setCount;
					arrayPosition = i;
				};
			};
		};
	
		_buildOverlay(isSet);

		// Display the current position
		jQuery('div.pictureHolder span.currentText').html('<span>' + setPosition + '</span>' + '/' + setCount);

		// Position the picture in the center of the viewing area
		_centerPicture();
	
		jQuery('div.pictureHolder #fullResImageContainer').hide();
		jQuery('.loaderIcon').show();

		// Display the correct type of information
		(contentType == 'image') ? _preload() : _writeFlash();
	};

	showimage = function(width,height,containerWidth,containerHeight,contentHeight,contentWidth,resized){
		jQuery('.loaderIcon').hide();
		var scrollPos = _getScroll();

		if(jQuery.browser.opera) {
			windowHeight = window.innerHeight;
			windowWidth = window.innerWidth;
		}else{
			windowHeight = jQuery(window).height();
			windowWidth = jQuery(window).width();
		};

		jQuery('div.pictureHolder .content').animate({'height':contentHeight,'width':containerWidth},settings.animationSpeed);

		projectedTop = scrollPos['scrollTop'] + ((windowHeight/2) - (containerHeight/2));
		if(projectedTop < 0) projectedTop = 0 + jQuery('div.prettyPhotoTitle').height();

		// Resize the holder
		jQuery('div.pictureHolder').animate({
			'top': projectedTop,
			'left': ((windowWidth/2) - (containerWidth/2)),
			'width': containerWidth
		},settings.animationSpeed,function(){
			jQuery('#fullResImage').attr({
				'width':width,
				'height':height
			});

			jQuery('div.pictureHolder').width(containerWidth);
			jQuery('div.pictureHolder .hoverContainer').height(height).width(width);

			// Show the nav elements
			_shownav();

			// Fade the new image
			jQuery('div.pictureHolder #fullResImageContainer').fadeIn(settings.animationSpeed);
		
			// Fade the resizing link if the image is resized
			if(resized) jQuery('a.expand,a.contract').fadeIn(settings.animationSpeed);
		});
		
		// Tracking
		var fileName = imagesArray[arrayPosition].toString();
		var index = fileName.toLowerCase().search(/mediaCentre\/photos/i);
		
		// If it is a media centre photo
		if (index >=0)
		{
			var splitArray = fileName.split("/");
			splitArray = splitArray[splitArray.length - 1].split(".");
			var shortName = splitArray[0];
			
            jQuery.post("/global/track.aspx?ref=" + fileName);

            // Media Tracking
            jQuery.post("/defencetv/trackView.aspx?shortName=" + URLEncode(shortName));
            
            // Google Analytics
            gaTracker._trackPageview(fileName);
		}
	};

	function changePicture(direction){
		if(direction == 'previous') {
			arrayPosition--;
			setPosition--;
		}else{
			arrayPosition++;
			setPosition++;
		};

		// Allow the resizing of the images
		if(!doresize) doresize = true;

		// Fade out the current picture
		jQuery('div.pictureHolder .hoverContainer,div.pictureHolder .details').fadeOut(settings.animationSpeed);
		jQuery('div.pictureHolder #fullResImageContainer').fadeOut(settings.animationSpeed,function(){
			jQuery('.loaderIcon').show();
		
			// Preload the image
			_preload();
		});

		_hideTitle();
		jQuery('a.expand,a.contract').fadeOut(settings.animationSpeed,function(){
			jQuery(this).removeClass('contract').addClass('expand');
		});
	};

	function close(){
		jQuery('div.pictureHolder,div.prettyPhotoTitle').fadeOut(settings.animationSpeed, function(){
			jQuery('div.prettyPhotoOverlay').fadeOut(settings.animationSpeed, function(){
				jQuery('div.prettyPhotoOverlay,div.pictureHolder,div.prettyPhotoTitle').remove();
			
				// To fix the bug with IE select boxes
				if(jQuery.browser.msie && jQuery.browser.version == 6){
					jQuery('select').css('visibility','visible');
				};
			});
		});
	};

	function _checkPosition(){
		// If at the end, hide the next link
		(setPosition == setCount) ? jQuery('div.pictureHolder a.next').css('visibility','hidden') : jQuery('div.pictureHolder a.next').css('visibility','visible');
	
		// If at the beginning, hide the previous link
		(setPosition == 1) ? jQuery('div.pictureHolder a.previous').css('visibility','hidden') : jQuery('div.pictureHolder a.previous').css('visibility','visible');
	
		// Change the current picture text
		jQuery('div.pictureHolder span.currentText span').text(setPosition);
	
		(isSet) ? jQueryc = jQuery(imagesArray[arrayPosition]) : jQueryc = jQuery(caller);

		if(jQueryc.attr('title')){
			jQuery('div.pictureHolder .description').html(unescape(jQueryc.attr('title')));
		}else{
			jQuery('div.pictureHolder .description').text('');
		};
	
		if(jQueryc.find('img').attr('alt') && settings.showTitle){
			hasTitle = true;
			jQuery('div.prettyPhotoTitle .prettyPhotoTitleContent').html(unescape(jQueryc.find('img').attr('alt')));
		}else{
			hasTitle = false;
		};
	};

	function _fitToViewport(width,height){
		hasBeenResized = false;
	
		jQuery('div.pictureHolder .details').width(width); /* To have the correct height */
		jQuery('div.pictureHolder .details p.description').width(width - parseFloat(jQuery('div.pictureHolder a.close').css('width'))); /* So it doesn't overlap the button */
	
		// Get the container size, to resize the holder to the right dimensions
		contentHeight = height + parseFloat(jQuery('div.pictureHolder .details').height()) + parseFloat(jQuery('div.pictureHolder .details').css('margin-top')) + parseFloat(jQuery('div.pictureHolder .details').css('margin-bottom'));
		contentWidth = width;
		containerHeight = height + parseFloat(jQuery('div.prettyPhotoTitle').height()) + parseFloat(jQuery('div.pictureHolder .top').height()) + parseFloat(jQuery('div.pictureHolder .bottom').height());
		containerWidth = width + settings.padding;
	
		// Define them in case there's no resize needed
		imageWidth = width;
		imageHeight = height;

		if(jQuery.browser.opera) {
			windowHeight = window.innerHeight;
			windowWidth = window.innerWidth;
		}else{
			windowHeight = jQuery(window).height();
			windowWidth = jQuery(window).width();
		};
	
		if( ((containerWidth > windowWidth) || (containerHeight > windowHeight)) && doresize && settings.allowresize) {
			hasBeenResized = true;
		
			if((containerWidth > windowWidth) && (containerHeight > windowHeight)){
				// Get the original geometry and calculate scales
				var xscale =  (containerWidth + 200) / windowWidth;
				var yscale = (containerHeight + 200) / windowHeight;
			}else{
				// Get the original geometry and calculate scales
				var xscale = windowWidth / containerWidth;
				var yscale = windowHeight / containerHeight;
			}

			// Recalculate new size with default ratio
			if (yscale>xscale){
				imageWidth = Math.round(width * (1/yscale));
				imageHeight = Math.round(height * (1/yscale));
			} else {
				imageWidth = Math.round(width * (1/xscale));
				imageHeight = Math.round(height * (1/xscale));
			};
		
			// Define the new dimensions
			contentHeight = imageHeight + parseFloat(jQuery('div.pictureHolder .details').height()) + parseFloat(jQuery('div.pictureHolder .details').css('margin-top')) + parseFloat(jQuery('div.pictureHolder .details').css('margin-bottom'));
			contentWidth = imageWidth;
			containerHeight = imageHeight + parseFloat(jQuery('div.prettyPhotoTitle').height()) + parseFloat(jQuery('div.pictureHolder .top').height()) + parseFloat(jQuery('div.pictureHolder .bottom').height());
			containerWidth = imageWidth + settings.padding;
		
			jQuery('div.pictureHolder .details').width(contentWidth); /* To have the correct height */
			jQuery('div.pictureHolder .details p.description').width(contentWidth - parseFloat(jQuery('div.pictureHolder a.close').css('width'))); /* So it doesn't overlap the button */
		};

		return {
			width:imageWidth,
			height:imageHeight,
			containerHeight:containerHeight,
			containerWidth:containerWidth,
			contentHeight:contentHeight,
			contentWidth:contentWidth,
			resized:hasBeenResized
		};
	};

	function _centerPicture(){
		//Make sure the gallery is open
		if(jQuery('div.pictureHolder').size() > 0){
		
			var scrollPos = _getScroll();
		
			if(jQuery.browser.opera) {
				windowHeight = window.innerHeight;
				windowWidth = window.innerWidth;
			}else{
				windowHeight = jQuery(window).height();
				windowWidth = jQuery(window).width();
			};
		
			if(doresize) {
				projectedTop = (windowHeight/2) + scrollPos['scrollTop'] - (jQuery('div.pictureHolder').height()/2);
				if(projectedTop < 0) projectedTop = 0 + jQuery('div.prettyPhotoTitle').height();
				
				jQuery('div.pictureHolder').css({
					'top': projectedTop,
					'left': (windowWidth/2) + scrollPos['scrollLeft'] - (jQuery('div.pictureHolder').width()/2)
				});
		
				jQuery('div.prettyPhotoTitle').css({
					'top' : jQuery('div.pictureHolder').offset().top - jQuery('div.prettyPhotoTitle').height(),
					'left' : jQuery('div.pictureHolder').offset().left + (settings.padding/2)
				});
			};
		};
	};

	function _shownav(){
		if(isSet) jQuery('div.pictureHolder .hoverContainer').fadeIn(settings.animationSpeed);
		jQuery('div.pictureHolder .details').fadeIn(settings.animationSpeed);

		_showTitle();
	};

	function _showTitle(){
		if(settings.showTitle && hasTitle){
			jQuery('div.prettyPhotoTitle').css({
				'top' : jQuery('div.pictureHolder').offset().top,
				'left' : jQuery('div.pictureHolder').offset().left + (settings.padding/2),
				'display' : 'block'
			});
		
			jQuery('div.prettyPhotoTitle div.prettyPhotoTitleContent').css('width','auto');
		
			if(jQuery('div.prettyPhotoTitle').width() > jQuery('div.pictureHolder').width()){
				jQuery('div.prettyPhotoTitle div.prettyPhotoTitleContent').css('width',jQuery('div.pictureHolder').width() - (settings.padding * 2));
			}else{
				jQuery('div.prettyPhotoTitle div.prettyPhotoTitleContent').css('width','');
			};
		
			jQuery('div.prettyPhotoTitle').animate({'top':(jQuery('div.pictureHolder').offset().top - 22)},settings.animationSpeed);
		};
	};

	function _hideTitle() {
		jQuery('div.prettyPhotoTitle').animate({'top':(jQuery('div.pictureHolder').offset().top)},settings.animationSpeed,function() { jQuery(this).css('display','none'); });
	};

	function _preload(){
		// Hide the next/previous links if on first or last images.
		_checkPosition();
	
		// Set the new image
		imgPreloader = new Image();
	
		// Preload the neighbour images
		nextImage = new Image();
		
		if(isSet) nextImage.src = jQuery(imagesArray[arrayPosition + 1]).attr('href');
		prevImage = new Image();
		if(isSet && imagesArray[arrayPosition - 1]) prevImage.src = jQuery(imagesArray[arrayPosition - 1]).attr('href');

		jQuery('div.pictureHolder .content').css('overflow','hidden');
	
		if(isSet) {
			jQuery('div.pictureHolder #fullResImage').attr('src',jQuery(imagesArray[arrayPosition]).attr('href'));
		}else{
			jQuery('div.pictureHolder #fullResImage').attr('src',jQuery(caller).attr('href'));
		};

		imgPreloader.onload = function(){
			var correctSizes = _fitToViewport(imgPreloader.width,imgPreloader.height);
			imgPreloader.width = correctSizes['width'];
			imgPreloader.height = correctSizes['height'];
		
			// Need that small delay for the anim to be nice
			setTimeout('showimage(imgPreloader.width,imgPreloader.height,'+correctSizes["containerWidth"]+','+correctSizes["containerHeight"]+','+correctSizes["contentHeight"]+','+correctSizes["contentWidth"]+','+correctSizes["resized"]+')',500);
		};
	
		(isSet) ? imgPreloader.src = jQuery(imagesArray[arrayPosition]).attr('href') : imgPreloader.src = jQuery(caller).attr('href');
	};

	function _getScroll(){
		scrollTop = window.pageYOffset || document.documentElement.scrollTop || 0;
		scrollLeft = window.pageXOffset || document.documentElement.scrollLeft || 0;
		return {scrollTop:scrollTop,scrollLeft:scrollLeft};
	};

	function _resizeOverlay() {
		jQuery('div.prettyPhotoOverlay').css({
			'height':jQuery(document).height(),
			'width':jQuery(window).width()
		});
	};

	function _writeFlash(){
		flashParams = jQuery(caller).attr('rel').split(';');
		jQuery(flashParams).each(function(i){
			// Define the width and height
			if(flashParams[i].indexOf('width') >= 0) flashWidth = flashParams[i].substring(flashParams[i].indexOf('width') + 6, flashParams[i].length);
			if(flashParams[i].indexOf('height') >= 0) flashHeight = flashParams[i].substring(flashParams[i].indexOf('height') + 7, flashParams[i].length);
			if(flashParams[i].indexOf('flashvars') >= 0) flashVars = flashParams[i].substring(flashParams[i].indexOf('flashvars') + 10, flashParams[i].length);
		});
	
		jQuery('.pictureHolder #fullResImageContainer').append('<embed width="'+flashWidth+'" height="'+flashHeight+'" pluginspage="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash" type="application/x-shockwave-flash" wmode="opaque" name="prettyFlash" flashvars="'+flashVars+'" allowscriptaccess="always" bgcolor="#FFFFFF" quality="high" src="'+jQuery(caller).attr('href')+'"/>');
		jQuery('#fullResImage').hide();
	
		contentHeight = parseFloat(flashHeight) + parseFloat(jQuery('div.pictureHolder .details').height()) + parseFloat(jQuery('div.pictureHolder .details').css('margin-top')) + parseFloat(jQuery('div.pictureHolder .details').css('margin-bottom'));
		contentWidth = parseFloat(flashWidth)+ parseFloat(jQuery('div.pictureHolder .details').width()) + parseFloat(jQuery('div.pictureHolder .details').css('margin-left')) + parseFloat(jQuery('div.pictureHolder .details').css('margin-right'));
		containerHeight = contentHeight + parseFloat(jQuery('div.pictureHolder .top').height()) + parseFloat(jQuery('div.pictureHolder .bottom').height());
		containerWidth = parseFloat(flashWidth) + parseFloat(jQuery('div.pictureHolder .content').css("padding-left")) + parseFloat(jQuery('div.pictureHolder .content').css("padding-right")) + settings.padding;
	
		setTimeout('showimage('+flashWidth+','+flashHeight+','+containerWidth+','+containerHeight+','+contentHeight+','+contentWidth+')',500);
	};

	function _buildOverlay(){
	
		// Build the background overlay div
		backgroundDiv = "<div class='prettyPhotoOverlay'></div>";
		jQuery('body').append(backgroundDiv);
		jQuery('div.prettyPhotoOverlay').css('height',jQuery(document).height()).bind('click',function(){
			close();
		});
	
		// Basic HTML for the picture holder
		pictureHolder = '<div class="pictureHolder"><div class="top"><div class="left"></div><div class="middle"></div><div class="right"></div></div><div class="content"><a href="#" class="expand" title="Expand the image">Expand</a><div class="loaderIcon"></div><div class="hoverContainer"><a class="next" href="#">next</a><a class="previous" href="#">previous</a></div><div id="fullResImageContainer"><img id="fullResImage" src="" /></div><div class="details clearfix"><a class="close" href="#">Close</a><p class="description"></p><p class="currentTextHolder"><span class="currentText"><span>0</span>/<span class="total">0</span></span></p></div></div><div class="bottom"><div class="left"></div><div class="middle"></div><div class="right"></div></div></div>';
	
		// Basic html for the title holder
		titleHolder = '<div class="prettyPhotoTitle"><div class="prettyPhotoTitleLeft"></div><div class="prettyPhotoTitleContent"></div><div class="prettyPhotoTitleRight"></div></div>';

		jQuery('body').append(pictureHolder).append(titleHolder);

		jQuery('.pictureHolder,.titleHolder').css({'opacity': 0});
		jQuery('a.close').bind('click',function(){ close(); return false; });
		jQuery('a.expand').bind('click',function(){
		
			// Expand the image
			if(jQuery(this).hasClass('expand')){
				jQuery(this).removeClass('expand').addClass('contract');
				doresize = false;
			}else{
				jQuery(this).removeClass('contract').addClass('expand');
				doresize = true;
			};
		
			_hideTitle();
			jQuery('div.pictureHolder .hoverContainer,div.pictureHolder #fullResImageContainer').fadeOut(settings.animationSpeed);
			jQuery('div.pictureHolder .details').fadeOut(settings.animationSpeed,function(){
				_preload();
			});
		
			return false;
		});
	
		jQuery('.pictureHolder .previous').bind('click',function(){
			changePicture('previous');
			return false;
		});
	
		jQuery('.pictureHolder .next').bind('click',function(){
			changePicture('next');
			return false;
		});

		jQuery('.hoverContainer').css({
			'margin-left': settings.padding/2
		});
	
		// If it's not a set, hide the links
		if(!isSet) {
			jQuery('.hoverContainer,.currentTextHolder').hide();
		};


		// To fix the bug with IE select boxes
		if(jQuery.browser.msie && jQuery.browser.version == 6){
			jQuery('select').css('visibility','hidden');
		};

		// Then fade it in
		jQuery('div.prettyPhotoOverlay').css('opacity',0).fadeTo(settings.animationSpeed,settings.opacity, function(){
			jQuery('div.pictureHolder').css('opacity',0).fadeIn(settings.animationSpeed,function(){
				// To fix an IE bug
				jQuery('div.pictureHolder').attr('style','left:'+jQuery('div.pictureHolder').css('left')+';top:'+jQuery('div.pictureHolder').css('top')+';');
			});
		});
	};
};