/*!
	Slimbox v2.04 - The ultimate lightweight Lightbox clone for jQuery
	(c) 2007-2010 Christophe Beyls <http://www.digitalia.be>
	MIT-style license.
*/

(function($) {

	// Global variables, accessible to Slimbox only
	var win = $(window), options, images, activeImage = -1, activeURL, prevImage, nextImage, compatibleOverlay, middle, centerWidth, centerHeight,
		ie6 = !window.XMLHttpRequest, hiddenElements = [], documentElement = document.documentElement, big_description,

	// Preload images
	preload = {}, preloadPrev = new Image(), preloadNext = new Image(),

	// DOM elements
	overlay, center, image, sizer, prevLink, nextLink, bottomContainer, bottom, caption, software, description, number,
	
	// TEMP variables & Preload images
	temp_activeURL, temp_preload = {};
	
	/*
		Initialization
	*/

	$(function() {
		// Append the Slimbox HTML code at the bottom of the document
		$("body").append(
			$([
				overlay = $('<div id="lbOverlay" />')[0],
				center = $('<div id="lbCenter" />')[0],
				bottomContainer = $('<div id="lbBottomContainer" />')[0]
			]).css("display", "none")
		);

		image = $('<div id="lbImage" />').appendTo(center).append(
			sizer = $('<div style="position: relative;" />').append([
				prevLink = $('<a id="lbPrevLink" href="#" />').click(previous)[0],
				nextLink = $('<a id="lbNextLink" href="#" />').click(next)[0]
			])[0]
		)[0];
		
		add_img = $('<div id="lbAdd"></div>').appendTo('#lbCenter');

		bottom = $('<div id="lbBottom" />').appendTo(bottomContainer).append([
			$('<a id="lbCloseLink" href="#" />').add(overlay).click(close)[0],
			caption = $('<div id="lbCaption" />')[0],
			software = $('<div id="lbSoftware" />')[0],
			description = $('<div id="lbDescription" />')[0],
			number = $('<div id="lbNumber" />')[0],
			$('<div style="clear: both;" />')[0]
		])[0];
	});


	/*
		API
	*/

	// Open Slimbox with the specified parameters
	$.slimbox = function(_images, startImage, _options) {
		options = $.extend({
			loop: false,				// Allows to navigate between first and last images
			overlayOpacity: 0.88,			// 1 is opaque, 0 is completely transparent (change the color in the CSS file)
			overlayFadeDuration: 400,		// Duration of the overlay fade-in and fade-out animations (in milliseconds)
			resizeDuration: 400,			// Duration of each of the box resize animations (in milliseconds)
			resizeEasing: "swing",			// "swing" is jQuery's default easing
			initialWidth: 250,			// Initial width of the box (in pixels)
			initialHeight: 250,			// Initial height of the box (in pixels)
			imageFadeDuration: 400,			// Duration of the image fade-in animation (in milliseconds)
			captionAnimationDuration: 400,		// Duration of the caption animation (in milliseconds)
			counterText: "Image {x} of {y}",	// Translate or change as you wish, or set it to false to disable counter text for image groups
			closeKeys: [27, 88, 67],		// Array of keycodes to close Slimbox, default: Esc (27), 'x' (88), 'c' (67)
			previousKeys: [37, 80],			// Array of keycodes to navigate to the previous image, default: Left arrow (37), 'p' (80)
			nextKeys: [39, 78],			// Array of keycodes to navigate to the next image, default: Right arrow (39), 'n' (78)
			simple: false
		}, _options);

		// The function is called for a single image, with URL and Title as first two arguments
		if (typeof _images == "string") {
			_images = [[_images, startImage]];
			startImage = 0;
		}

		middle = win.scrollTop() + (win.height() / 2);
		centerWidth = options.initialWidth;
		centerHeight = options.initialHeight;
		$(center).css({top: Math.max(0, middle - (centerHeight / 2)), width: centerWidth, height: centerHeight, marginLeft: -centerWidth/2}).show();
		compatibleOverlay = ie6 || (overlay.currentStyle && (overlay.currentStyle.position != "fixed"));
		if (compatibleOverlay) overlay.style.position = "absolute";
		$(overlay).css("opacity", options.overlayOpacity).fadeIn(options.overlayFadeDuration);
		position();
		setup(1);

		images = _images;
		options.loop = options.loop && (images.length > 1);
		return changeImage(startImage);
	};

	/*
		options:	Optional options object, see jQuery.slimbox()
		linkMapper:	Optional function taking a link DOM element and an index as arguments and returning an array containing 2 elements:
				the image URL and the image caption (may contain HTML)
		linksFilter:	Optional function taking a link DOM element and an index as arguments and returning true if the element is part of
				the image collection that will be shown on click, false if not. "this" refers to the element that was clicked.
				This function must always return true when the DOM element argument is "this".
	*/
	$.fn.slimbox = function(_options, linkMapper, linksFilter) {
		linkMapper = linkMapper || function(el) {
			return [el.href, el.title];
		};

		linksFilter = linksFilter || function() {
			return true;
		};

		var links = this;

		return links.unbind("click").click(function() {
			// Build the list of images that will be displayed
			var link = this, startIndex = 0, filteredLinks, i = 0, length;
			filteredLinks = $.grep(links, function(el, i) {
				return linksFilter.call(link, el, i);
			});

			// We cannot use jQuery.map() because it flattens the returned array
			for (length = filteredLinks.length; i < length; ++i) {
				if (filteredLinks[i] == link) startIndex = i;
				filteredLinks[i] = linkMapper(filteredLinks[i], i);
			}

			return $.slimbox(filteredLinks, startIndex, _options);
		});
	};


	/*
		Internal functions
	*/

	function position() {
		var l = win.scrollLeft(), w = win.width();
		$([center, bottomContainer]).css("left", l + (w / 2));
		if (compatibleOverlay) $(overlay).css({left: l, top: win.scrollTop(), width: w, height: win.height()});
	}

	function setup(open) {
		if (open) {
			$("object").add(ie6 ? "select" : "embed").each(function(index, el) {
				hiddenElements[index] = [el, el.style.visibility];
				el.style.visibility = "hidden";
			});
		} else {
			$.each(hiddenElements, function(index, el) {
				el[0].style.visibility = el[1];
			});
			hiddenElements = [];
		}
		var fn = open ? "bind" : "unbind";
		win[fn]("scroll resize", position);
		$(document)[fn]("keydown", keyDown);
	}

	function keyDown(event) {
		var code = event.keyCode, fn = $.inArray;
		// Prevent default keyboard action (like navigating inside the page)
		return (fn(code, options.closeKeys) >= 0) ? close()
			: (fn(code, options.nextKeys) >= 0) ? next()
			: (fn(code, options.previousKeys) >= 0) ? previous()
			: false;
	}

	function previous() {
		return changeImage(prevImage);
	}

	function next() {
		return changeImage(nextImage);
	}

	function changeImage(imageIndex) {
		if (imageIndex >= 0) {
			activeImage = imageIndex;
			activeURL = images[activeImage][0];
			prevImage = (activeImage || (options.loop ? images.length : 0)) - 1;
			nextImage = ((activeImage + 1) % images.length) || (options.loop ? 0 : -1);

			stop();
			center.className = "lbLoading";

			preload = new Image();
			preload.onload = animateBox;
			preload.src = activeURL;
			
			if (!options.simple) {
			
				// Remove all previous children
				$('#lbAdd').children().remove();
			
				var has_add_images = false;
				var preload_add_images = [];
				
				// Insert the thumbs into the container
				$('#lbAdd').append('<div class="add_caption" style="display:none;">additional images</div>');
				$('#additional-'+ activeImage +' li').each(function(index) {
					$('#lbAdd').append('<img class="add_thumb" src="content/portfolio/add/' 
						+ $(this).find('span').html() + '" width="50" alt="' + $(this).find('em').html() + '" />');
					has_add_images = true;
					// Preload image
					preload_add_images[index] = new Image();
					preload_add_images[index].src = $(this).attr('src');
				});
			
				// Fade the thumbs on mouseover
				$('.add_thumb').fadeTo(0, 0).load(function() {
					$('.add_caption').fadeIn('slow');
					$(this).fadeTo('slow', 0.6).hover(
						function() {
							$(this).fadeTo('fast',1);
						},
						function() {
							$(this).fadeTo('fast',0.6);
						}
					);
				});
			
				// Add the back-2-main image thumb
				if (has_add_images != 0) {
					$('#lbAdd').append('<div class="b2m" style="display:none;"></div>');
					$('.b2m').append('<div class="add_caption">back to main image</div>');
					$('.b2m').append('<img src="'+images[activeImage][0]+'" class="add_main_thumb" width="50" />');
				}
			
				// thumb click event
				$('.add_thumb').click(function() {
					var p_this = $(this);
				
					// Remove previous 'current'
					$('.add_thumb, .add_main_thumb').animate({
						'border-top-width': 0,
						'margin-top': 0,
						'margin-bottom': 5
					}, 'fast');
				
					// Mark this item as 'current'
					$(this).animate({
						'border-top-width': 5,
						'margin-top': 0,
						'margin-bottom': 5
					}, 'fast');
				
					// Fade the original image out
					$(image).fadeTo(0, 0, function() {
						activeURL = p_this.attr('src');
						stop(true);
						center.className = "lbLoading";
						preload = new Image();
						preload.onload = function() { animateBox2(p_this.attr('alt')); };
						preload.src = activeURL;
					});
					// ENDS: fade original image out
				
					// Fade the back-2-main back in
					$('.b2m').fadeIn('fast');
				});
				// ENDS: thumb click event
			
				// back-2-main click event
				$('.add_main_thumb').click(function() {
				
					// Remove 'current'
					$('.add_thumb').animate({
						'border-top-width': 0,
						'margin-top': 0,
						'margin-bottom': 5
					}, 'fast');
				
					// Fade the back-2-main thumb out
					$('.b2m').fadeOut('fast');
				
					// Fade the main image out
					$('#lbImage').fadeTo(0, 0, function() {
						// Restore the original image
						activeURL = images[activeImage][0];
						stop(true);
						center.className = "lbLoading";
						preload = new Image();
						preload.onload = function() { animateBox2(-1); };
						preload.src = activeURL;
					});
					// ENDS: fade image out
				});
				// ENDS: back-2-main click event
			}
			// ENDS: if (!options.simple)
			
		}

		return false;
	}
	
	function animateBox2(p_descr) {
		center.className = "";
		$(image).css({backgroundImage: "url(" + activeURL + ")", visibility: "hidden", display: ""});
		$(sizer).width(preload.width);
		$([sizer, prevLink, nextLink]).height(preload.height);
		
		// Insert the description
		$(description).html(p_descr == -1 ? $('#description-' + activeImage).html() : p_descr).css('margin-top', $(description).html().length>0 ? 10 : 0);
		
		// Calculate the new dimensions of Slimbox
		centerWidth = image.offsetWidth;
		centerHeight = image.offsetHeight;
		var top = Math.max(0, middle - (centerHeight / 2));
		if (($(description).html().length > 300 && centerHeight > 600) || centerHeight > 700) top = $(document).scrollTop() + 25;
		
		// Set the new dimensions
		if (center.offsetHeight != centerHeight) {
			$(center).animate({
				'height': centerHeight,
				'top': top
			}, 0);
		}
		if (center.offsetWidth != centerWidth) {
			$(center).animate({
				'width': centerWidth,
				'margin-left': -centerWidth/2
			}, 0);
		}
		
		// Update the bottom container
		$(center).queue(function() {
			$(bottomContainer).css({
				'width': centerWidth,
				'top': top + centerHeight,
				'margin-left': -centerWidth/2
			});
			$(image).css({
				'display': 'none',
				'visibility': '',
				'opacity': ''
			}).fadeIn(0, function() {
				if (prevImage >= 0) $(prevLink).show();
				if (nextImage >= 0) $(nextLink).show();
			});
		});
	}
	

	function animateBox() {
		center.className = "";
		$(image).css({backgroundImage: "url(" + activeURL + ")", visibility: "hidden", display: ""});
		$(sizer).width(preload.width);
		$([sizer, prevLink, nextLink]).height(preload.height);
		
		// Insert the caption
		if (!options.simple) $(caption).html(images[activeImage][1] || "");
		
		// Insert the software
		if (!options.simple) $(software).html('<strong>Software:</strong> ' + $('#portfolio-' + activeImage + ' img').attr('alt'));
		
		// Insert the description
		if (!options.simple) $(description).html($('#description-' + activeImage).html()).css('margin-top', $(description).html().length>0 ? 10 : 0);
		if (options.simple) $(description).html(images[activeImage][1] || "");
		
		// Insert the page number
		$(number).html((((images.length > 1) && options.counterText) || "").replace(/{x}/, activeImage + 1).replace(/{y}/, images.length));

		// Preload next & previous image
		if (prevImage >= 0) preloadPrev.src = images[prevImage][0];
		if (nextImage >= 0) preloadNext.src = images[nextImage][0];

		// Calculate the new dimensions of Slimbox
		centerWidth = image.offsetWidth;
		centerHeight = image.offsetHeight;
		var top = Math.max(0, middle - (centerHeight / 2));
		if (!options.simple && (($(description).html().length > 300 && centerHeight > 600) || centerHeight > 700)) top = $(document).scrollTop() + 25;
		
		// Set the new dimensions
		if (center.offsetHeight != centerHeight) {
			$(center).animate({height: centerHeight, top: top}, options.resizeDuration, options.resizeEasing);
		}
		if (center.offsetWidth != centerWidth) {
			$(center).animate({width: centerWidth, marginLeft: -centerWidth/2}, options.resizeDuration, options.resizeEasing);
		}
		
		// Update the bottom container
		$(center).queue(function() {
			$(bottomContainer).css({width: centerWidth, top: top + centerHeight, marginLeft: -centerWidth/2, visibility: "hidden", display: ""});
			$(image).css({display: "none", visibility: "", opacity: ""}).fadeIn(options.imageFadeDuration, animateCaption);
		});
	}

	function animateCaption() {
		if (prevImage >= 0) $(prevLink).show();
		if (nextImage >= 0) $(nextLink).show();
		$(bottom).css("marginTop", -bottom.offsetHeight).animate({marginTop: 0}, options.captionAnimationDuration);
		bottomContainer.style.visibility = "";
	}

	function stop(p_mode) {
		preload.onload = null;
		preload.src = preloadPrev.src = preloadNext.src = activeURL;
		$([center, image, bottom]).stop(true);
		if (p_mode == undefined) {
			$([prevLink, nextLink, image, bottomContainer]).hide();
		} else {
			$([prevLink, nextLink, image]).hide();
		}
	}

	function close() {
		if (activeImage >= 0) {
			stop();
			activeImage = prevImage = nextImage = -1;
			$(center).hide();
			$(overlay).stop().fadeOut(options.overlayFadeDuration, setup);
		}

		return false;
	}

})(jQuery);

// AUTOLOAD CODE BLOCK (MAY BE CHANGED OR REMOVED)
if (!/android|iphone|ipod|series60|symbian|windows ce|blackberry/i.test(navigator.userAgent)) {
	jQuery(function($) {
		$("a[rel^='lightbox']").slimbox({/* Put custom options here */}, null, function(el) {
			return (this == el) || ((this.rel.length > 8) && (this.rel == el.rel));
		});
		$("a[rel^='s-lightbox']").slimbox({ simple: true }, null, function(el) {
			return (this == el) || ((this.rel.length > 8) && (this.rel == el.rel));
		});
	});
}