/**
 * Galleria ( http://monc.se/kitchen )
 *
 * Galleria is a javascript image gallery written in jQuery. 
 * It loads the images one by one from an unordered list and displays thumbnails when each image is loaded. 
 * It will create thumbnails for you if you choose so, scaled or unscaled, 
 * centered and cropped inside a fixed thumbnail box defined by CSS.
 * 
 * The core of Galleria lies in it's smart preloading behaviour, snappiness and the fresh absence 
 * of obtrusive design elements. Use it as a foundation for your custom styled image gallery.
 *
 * MAJOR CHANGES v.FROM 0.9
 * Galleria now features a useful history extension, enabling back button and bookmarking for each image.
 * The main image is no longer stored inside each list item, instead it is placed inside a container
 * onImage and onThumb functions lets you customize the behaviours of the images on the site
 *
 * Tested in Safari 3, Firefox 2, MSIE 6, MSIE 7, Opera 9
 * 
 * Version 1.0
 * Februari 21, 2008
 *
 * Copyright (c) 2008 David Hellsing (http://monc.se)
 * Licensed under the GPL licenses.
 * http://www.gnu.org/licenses/gpl.txt
 **/

(function($) {
	var $$;
	$$ = $.fn.galleria = function($options) {
		if (!$$.hasCSS()) { return false; }
		$.historyInit($$.onPageLoad);
		var $defaults = {
			insert: '.galleria_container',
			history: true,
			clickNext: true,
			resizeThumb: false,
			onImage: function(image, caption, thumb, init) { },
			onThumb: function(thumb) { }
		};
		var $opts = $.extend($defaults, $options);
		for (var i in $opts) {
			$.galleria[i] = $opts[i];
		}
		var _insert = $($opts.insert);
		var _div = $(document.createElement('div')).addClass('galleria_wrapper');
		var _span = $(document.createElement('span')).addClass('caption');
		_insert.addClass('galleria_container').append(_div).append(_span);

		return this.each(function() {
			$(this).addClass('galleria');
			$(this).children('li').each(function(i) {
				var _container = $(this);
				var _o = $.meta ? $.extend({}, $opts, _container.data()) : $opts;
				_o.clickNext = $(this).is(':only-child') ? false : _o.clickNext;
				var _a = $(this).find('a').is('a') ? $(this).find('a') : false;
				var _img = $(this).children('img').css('display', 'none');
				var _src = _a ? _a.attr('href') : _img.attr('src');
				var _title = _a ? _a.attr('title') : _img.attr('title');
				var _loader = new Image();
				if (_o.history && (window.location.hash && window.location.hash.replace(/\#/, '') == _src)) {
					_container.siblings('.active').removeClass('active');
					_container.addClass('active');
				}
				$(_loader).load(function() {
					$(this).attr('alt', _img.attr('alt'));
					var _thumb = _a ? _a.find('img').addClass('thumb noscale').css('display', 'none') : _img.clone(true).addClass('thumb').css('display', 'none');
					if (_a) { _a.replaceWith(_thumb); }
					if ($opts.resizeThumb) {
						if (!_thumb.hasClass('noscale')) {
							var w = Math.ceil(_img.width() / _img.height() * _container.height());
							var h = Math.ceil(_img.height() / _img.width() * _container.width());
							if (w < h) {
								_thumb.css({ height: 'auto', width: _container.width(), marginTop: -(h - _container.height()) / 2 });
							} else {
								_thumb.css({ width: 'auto', height: _container.height(), marginLeft: -(w - _container.width()) / 2 });
							}
						} else {
							window.setTimeout(function() {
								_thumb.css({
									marginLeft: -(_thumb.width() - _container.width()) / 2,
									marginTop: -(_thumb.height() - _container.height()) / 2
								});
							}, 1);
						}
					}
					_thumb.attr('rel', _src);
					_thumb.attr('title', _title);
					_thumb.click(function() {
						$.galleria.activate(_src);
					});
					_thumb.hover(
						function() { $(this).addClass('hover'); },
						function() { $(this).removeClass('hover'); }
					);
					_container.hover(
						function() { _container.addClass('hover'); },
						function() { _container.removeClass('hover'); }
					);
					_container.prepend(_thumb);
					_thumb.css('display', '');
					_o.onThumb(jQuery(_thumb));
					if (_container.hasClass('active')) {
						$.galleria.activate(_src);
					}
					_img.remove();

				}).error(function() {
					_container.html('<span class="error" style="color:red">Error loading image: ' + _src + '</span>');
				}).attr('src', _src);
			});
		});
	};
	$$.nextSelector = function(selector) {
		return $(selector).is(':last-child') ? $(selector).siblings(':first-child') : $(selector).next();
	};
	$$.previousSelector = function(selector) {
		return $(selector).is(':first-child') ? $(selector).siblings(':last-child') : $(selector).prev();
	};
	$$.hasCSS = function() {
		$('body').append($(document.createElement('div')).attr('id', 'css_test').css({ width: '1px', height: '1px', display: 'none' }));
		var _v = ($('#css_test').width() != 1) ? false : true;
		$('#css_test').remove();
		return _v;
	};
	$$.onPageLoad = function(_src) {
		var _wrapper = $('.galleria_wrapper');
		var _thumb = $('.galleria img[@rel="' + _src + '"]');
		var _init = ($.galleria.current == '' || $.galleria.current == null);
		if (_src) {
			if ($.galleria.history) {
				window.location = window.location.href.replace(/\#.*/, '') + '#' + _src;
			}
			_thumb.parents('li').siblings('.active').removeClass('active');
			_thumb.parents('li').addClass('active');
			var _img = $(new Image()).attr('src', _src).addClass('replaced');
			if (_init) _img.css('display', 'none');
			_wrapper.empty().append(_img);
			_wrapper.siblings('.caption').text(_thumb.attr('title'));
			$.galleria.onImage(_img, _wrapper.siblings('.caption'), _thumb, _init);
			if ($.galleria.clickNext) {
				_img.css('cursor', 'pointer').click(function() { $.galleria.next(); })
			}
		} else {
			_wrapper.siblings().andSelf().empty();
			$('.galleria li.active').removeClass('active');
		}
		$.galleria.current = _src;
	};
	$.extend({ galleria: {
		current: '',
		onImage: function() { },
		activate: function(_src) {
			if ($.galleria.history) {
				$.historyLoad(_src);
			} else {
				$$.onPageLoad(_src);
			}
		},
		next: function() {
			var _next = $($$.nextSelector($('.galleria img[@rel="' + $.galleria.current + '"]').parents('li'))).find('img').attr('rel');
			$.galleria.activate(_next);
		},
		prev: function() {
			var _prev = $($$.previousSelector($('.galleria img[@rel="' + $.galleria.current + '"]').parents('li'))).find('img').attr('rel');
			$.galleria.activate(_prev);
		}
	}
	});
})(jQuery);
jQuery.extend({historyCurrentHash:undefined,historyCallback:undefined,historyInit:function(callback){jQuery.historyCallback=callback;var current_hash=location.hash;jQuery.historyCurrentHash=current_hash;if(jQuery.browser.msie){if(jQuery.historyCurrentHash==''){jQuery.historyCurrentHash='#'}$("body").prepend('<iframe id="jQuery_history" style="display: none;"></iframe>');var ihistory=$("#jQuery_history")[0];var iframe=ihistory.contentWindow.document;iframe.open();iframe.close();iframe.location.hash=current_hash}else if($.browser.safari){jQuery.historyBackStack=[];jQuery.historyBackStack.length=history.length;jQuery.historyForwardStack=[];jQuery.isFirst=true}jQuery.historyCallback(current_hash.replace(/^#/,''));setInterval(jQuery.historyCheck,100)},historyAddHistory:function(hash){jQuery.historyBackStack.push(hash);jQuery.historyForwardStack.length=0;this.isFirst=true},historyCheck:function(){if(jQuery.browser.msie){var ihistory=$("#jQuery_history")[0];var iframe=ihistory.contentDocument||ihistory.contentWindow.document;var current_hash=iframe.location.hash;if(current_hash!=jQuery.historyCurrentHash){location.hash=current_hash;jQuery.historyCurrentHash=current_hash;jQuery.historyCallback(current_hash.replace(/^#/,''))}}else if($.browser.safari){if(!jQuery.dontCheck){var historyDelta=history.length-jQuery.historyBackStack.length;if(historyDelta){jQuery.isFirst=false;if(historyDelta<0){for(var i=0;i<Math.abs(historyDelta);i++)jQuery.historyForwardStack.unshift(jQuery.historyBackStack.pop())}else{for(var i=0;i<historyDelta;i++)jQuery.historyBackStack.push(jQuery.historyForwardStack.shift())}var cachedHash=jQuery.historyBackStack[jQuery.historyBackStack.length-1];if(cachedHash!=undefined){jQuery.historyCurrentHash=location.hash;jQuery.historyCallback(cachedHash)}}else if(jQuery.historyBackStack[jQuery.historyBackStack.length-1]==undefined&&!jQuery.isFirst){if(document.URL.indexOf('#')>=0){jQuery.historyCallback(document.URL.split('#')[1])}else{var current_hash=location.hash;jQuery.historyCallback('')}jQuery.isFirst=true}}}else{var current_hash=location.hash;if(current_hash!=jQuery.historyCurrentHash){jQuery.historyCurrentHash=current_hash;jQuery.historyCallback(current_hash.replace(/^#/,''))}}},historyLoad:function(hash){var newhash;if(jQuery.browser.safari){newhash=hash}else{newhash='#'+hash;location.hash=newhash}jQuery.historyCurrentHash=newhash;if(jQuery.browser.msie){var ihistory=$("#jQuery_history")[0];var iframe=ihistory.contentWindow.document;iframe.open();iframe.close();iframe.location.hash=newhash;jQuery.historyCallback(hash)}else if(jQuery.browser.safari){jQuery.dontCheck=true;this.historyAddHistory(hash);var fn=function(){jQuery.dontCheck=false};window.setTimeout(fn,200);jQuery.historyCallback(hash);location.hash=newhash}else{jQuery.historyCallback(hash)}}});