/**
* jQuery lightBox plugin
* This jQuery plugin was inspired and based on Lightbox 2 by Lokesh Dhakar (http://www.huddletogether.com/projects/lightbox2/)
* and adapted to me for use like a plugin from jQuery.
* @name jquery-lightbox-0.5.js
* @author Leandro Vieira Pinho - http://leandrovieira.com
* @version 0.5
* @date April 11, 2008
* @category jQuery plugin
* @copyright (c) 2008 Leandro Vieira Pinho (leandrovieira.com)
* @license CC Attribution-No Derivative Works 2.5 Brazil - http://creativecommons.org/licenses/by-nd/2.5/br/deed.en_US
* @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin
*/
(function($)
{
    $.fn.lightBox = function(settings)
    {
        settings = jQuery.extend(
		{
			overlayBgColor: '#000',
			overlayOpacity: 0.5,
			fixedNavigation: false,
			imageLoading: WebId + '/images/lightbox-ico-loading.gif',
			imageBtnPrev: WebId + '/images/lightbox-btn-prev.gif',
			imageBtnNext: WebId + '/images/lightbox-btn-next.gif',
			imageBtnClose: WebId + '/images/lightbox-btn-close.gif',
			imageBlank: WebId + '/images/lightbox-blank.gif',
			containerBorderSize: 10,
			containerResizeSpeed: 400,
			txtImage: 'Bild',
			txtOf: 'von',
			keyToClose: 'c',
			keyToPrev: 'p',
			keyToNext: 'n',
			imageArray: [],
			activeImage: 0,
			onOpen: function(){},
			onClose: function(){}
		}, settings);

		var jQueryMatchedObj = this; 
		
		function _initialize() 
		{ 
			if (typeof(settings.onOpen) == "function")
			{
				settings.onOpen();
			}
			_start(this, jQueryMatchedObj);
			return false;
		}
		
        function _start(objClicked, jQueryMatchedObj)
        {
            $('embed, object, select').css({ 'visibility': 'hidden' });
			_set_interface();
			settings.imageArray.length = 0;
			settings.activeImage = 0;
			
			if (jQueryMatchedObj.length == 1)
			{ 
				settings.imageArray.push(new Array(objClicked.getAttribute('href'), objClicked.getAttribute('title')));
			} 
			
			else 
			{ 
				for (var i = 0; i < jQueryMatchedObj.length; i++)
				{ 
					settings.imageArray.push(new Array(jQueryMatchedObj[i].getAttribute('href'), jQueryMatchedObj[i].getAttribute('title')));
				}
			}
			
            while (settings.imageArray[settings.activeImage][0] != objClicked.getAttribute('href')) 
			{ 
				settings.activeImage++; 
			}
            _set_image_to_view();
        }
		
        function _set_interface() 
		{ 
			$('body').append('<div id="jquery-overlay"></div><div id="jquery-lightbox"><div id="lightbox-container-image-box"><div id="lightbox-container-image"><img id="lightbox-image"><div style="" id="lightbox-nav"><a href="#" id="lightbox-nav-btnPrev"></a><a href="#" id="lightbox-nav-btnNext"></a></div><div id="lightbox-loading"><a href="#" id="lightbox-loading-link"><img src="' + settings.imageLoading + '"></a></div></div></div><div id="lightbox-container-image-data-box"><div id="lightbox-container-image-data"><div id="lightbox-image-details"><span id="lightbox-image-details-caption"></span><span id="lightbox-image-details-currentNumber"></span></div><div id="lightbox-secNav"><a href="#" id="lightbox-secNav-btnClose"><img src="' + settings.imageBtnClose + '"></a></div></div></div></div>');
			var arrPageSizes = ___getPageSize();
			$('#jquery-overlay').css({ backgroundColor: settings.overlayBgColor, opacity: settings.overlayOpacity, width: arrPageSizes[0], height: arrPageSizes[1] }).fadeIn(); 
			var arrPageScroll = ___getPageScroll(); 
			$('#jquery-lightbox').css({ top: arrPageScroll[1] + (arrPageSizes[3] / 10), left: arrPageScroll[0] }).show(); 
			
			$('#jquery-overlay,#jquery-lightbox').click(function() 
			{ 
				_finish(); 
			}); 
			
			$('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() 
			{ 
				_finish(); 
				return false; 
			}); 
			
			$(window).resize(function() 
			{
				var arrPageSizes = ___getPageSize(); 
				$('#jquery-overlay').css({ width: arrPageSizes[0], height: arrPageSizes[1] }); 
				var arrPageScroll = ___getPageScroll(); 
				$('#jquery-lightbox').css({ top: arrPageScroll[1] + (arrPageSizes[3] / 10), left: arrPageScroll[0] }); 
			}); 
		}
        function _set_image_to_view()
        {
            $('#lightbox-loading').show();
			
			if (settings.fixedNavigation) 
			{ 
				$('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			} 
			
			else 
			{ 
				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();
			}
			
            var objImagePreloader = new Image();
			
			objImagePreloader.onload = function() 
			{ 
				$('#lightbox-image').attr('src', settings.imageArray[settings.activeImage][0]);
				_resize_container_image_box(objImagePreloader.width, objImagePreloader.height);
				objImagePreloader.onload = function() { };
			}; 
			objImagePreloader.src = settings.imageArray[settings.activeImage][0];
        }; 
		
		function _resize_container_image_box(intImageWidth, intImageHeight)
        {
            var intCurrentWidth = $('#lightbox-container-image-box').width();
			var intCurrentHeight = $('#lightbox-container-image-box').height();
			var intWidth = (intImageWidth + (settings.containerBorderSize * 2));
			var intHeight = (intImageHeight + (settings.containerBorderSize * 2));
			var intDiffW = intCurrentWidth - intWidth;
			var intDiffH = intCurrentHeight - intHeight;
			$('#lightbox-container-image-box').animate({ width: intWidth, height: intHeight }, settings.containerResizeSpeed, function() 
			{ 
				_show_image(); 
			}); 
			if ((intDiffW == 0) && (intDiffH == 0)) 
			{ 
				if ($.browser.msie) 
				{ 
					___pause(250); 
				} 
				else 
				{ 
					___pause(100); 
				} 
			}
			
            $('#lightbox-container-image-data-box').css({ width: intImageWidth });
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ height: intImageHeight + (settings.containerBorderSize * 2) });
        }; 
		
		function _show_image() 
		{ 
			$('#lightbox-loading').hide(); 
			$('#lightbox-image').fadeIn(function() 
			{ 
				_show_image_data();
				_set_navigation();
			}); 
			_preload_neighbor_images();
		}; 
		
		function _show_image_data()
        {
            $('#lightbox-container-image-data-box').slideDown('fast');
			$('#lightbox-image-details-caption').hide();
			
			if (settings.imageArray[settings.activeImage][1])
			{ 
				$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show(); 
			}
			
            if (settings.imageArray.length > 1) 
			{ 
				$('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + (settings.activeImage + 1) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show(); 
			} 
        }
        function _set_navigation()
        {
            $('#lightbox-nav').show();
			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background': 'transparent url(' + settings.imageBlank + ') no-repeat' });
			
			if (settings.activeImage != 0) 
			{ 
				if (settings.fixedNavigation) 
				{ 
					$('#lightbox-nav-btnPrev').css({ 'background': 'url(' + settings.imageBtnPrev + ') left 15% no-repeat' }).unbind().bind('click', function() 
					{ 
						settings.activeImage = settings.activeImage - 1; 
						_set_image_to_view(); 
						return false; 
					}); 
				} 
				else 
				{ 
					$('#lightbox-nav-btnPrev').unbind().hover(function() 
					{ 
						$(this).css({ 'background': 'url(' + settings.imageBtnPrev + ') left 15% no-repeat' });
					}, function() 
					{ 
						$(this).css({ 'background': 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click', function() 
					{ 
						settings.activeImage = settings.activeImage - 1;
						_set_image_to_view();
						return false; 
					}); 
				} 
			}
			
            if (settings.activeImage != (settings.imageArray.length - 1)) 
			{ 
				if (settings.fixedNavigation) 
				{ 
					$('#lightbox-nav-btnNext').css({ 'background': 'url(' + settings.imageBtnNext + ') right 15% no-repeat' }).unbind().bind('click', function() 
					{ 
						settings.activeImage = settings.activeImage + 1;
						_set_image_to_view();
						return false; 
					}); 
				} 
				
				else 
				{ 
					$('#lightbox-nav-btnNext').unbind().hover(function() 
					{ 
						$(this).css({ 'background': 'url(' + settings.imageBtnNext + ') right 15% no-repeat' }); 
					}, function() 
					{ 
						$(this).css({ 'background': 'transparent url(' + settings.imageBlank + ') no-repeat' });
					}).show().bind('click', function() 
					{ 
						settings.activeImage = settings.activeImage + 1;
						_set_image_to_view();
						return false;
					}); 
				} 
			}
            _enable_keyboard_navigation();
        }
		
        function _enable_keyboard_navigation() 
		{ 
			$(document).keydown(function(objEvent) 
			{ 
				_keyboard_action(objEvent);
			}); 
		}
		
        function _disable_keyboard_navigation() 
		{ 
			$(document).unbind(); 
		}
		
        function _keyboard_action(objEvent)
        {
            if (objEvent == null)
			{ 
				keycode = event.keyCode;
				escapeKey = 27;
			} 
			else 
			{ 
				keycode = objEvent.keyCode;
				escapeKey = objEvent.DOM_VK_ESCAPE;
			}
            key = String.fromCharCode(keycode).toLowerCase();
			
			if ((key == settings.keyToClose) || (key == 'x') || (keycode == escapeKey)) 
			{ 
				_finish(); 
			}
			
            if ((key == settings.keyToPrev) || (keycode == 37))
			{ 
				if (settings.activeImage != 0) 
				{ 
					settings.activeImage = settings.activeImage - 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			}
			
            if ((key == settings.keyToNext) || (keycode == 39))
			{ 
				if (settings.activeImage != (settings.imageArray.length - 1))
				{ 
					settings.activeImage = settings.activeImage + 1;
					_set_image_to_view();
					_disable_keyboard_navigation();
				}
			} 
        }
		
        function _preload_neighbor_images()
        {
            if ((settings.imageArray.length - 1) > settings.activeImage) 
			{ 
				objNext = new Image();
				objNext.src = settings.imageArray[settings.activeImage + 1][0];
			}
			
            if (settings.activeImage > 0)
			{ 
				objPrev = new Image();
				objPrev.src = settings.imageArray[settings.activeImage - 1][0];
			} 
        }
		
        function _finish() 
		{ 
			$('#jquery-lightbox').remove(); 
			$('#jquery-overlay').fadeOut(function() 
			{ 
				$('#jquery-overlay').remove(); 
				if (typeof(settings.onClose) == "function")
				{
					settings.onClose();
				}
			});
			$('embed, object, select').css({ 'visibility': 'visible' }); 
		}
		
        function ___getPageSize()
        {
            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) 
			{ 
				xScroll = document.body.scrollWidth;
				yScroll = document.body.scrollHeight;
			}
			else 
			{ 
				xScroll = document.body.offsetWidth;
				yScroll = document.body.offsetHeight;
			}
			
            var windowWidth, windowHeight; 
			if (self.innerHeight)
            {
                if (document.documentElement.clientWidth) 
				{ 
					windowWidth = document.documentElement.clientWidth; 
				}
				else 
				{ 
					windowWidth = self.innerWidth; 
				}
                windowHeight = self.innerHeight;
            } 
			else if (document.documentElement && document.documentElement.clientHeight) 
			{ 
				windowWidth = document.documentElement.clientWidth;
				windowHeight = document.documentElement.clientHeight;
			}
			else if (document.body) 
			{ 
				windowWidth = document.body.clientWidth;
				windowHeight = document.body.clientHeight;
			}
            
			if (yScroll < windowHeight) 
			{ 
				pageHeight = windowHeight;
			} 
			else 
			{ 
				pageHeight = yScroll; 
			}
			
            if (xScroll < windowWidth)
			{ 
				pageWidth = xScroll;
			} 
			else 
			{ 
				pageWidth = windowWidth; 
			}
            arrayPageSize = new Array(pageWidth, pageHeight, windowWidth, windowHeight);
			return arrayPageSize;
        }; 
		
		function ___getPageScroll()
        {
            var xScroll, yScroll;
			if (self.pageYOffset)
			{ 
				yScroll = self.pageYOffset;
				xScroll = self.pageXOffset;
			} 
			else if (document.documentElement && document.documentElement.scrollTop) 
			{ 
				yScroll = document.documentElement.scrollTop;
				xScroll = document.documentElement.scrollLeft;
			} 
			else if (document.body) 
			{ 
				yScroll = document.body.scrollTop;
				xScroll = document.body.scrollLeft;
			}
            arrayPageScroll = new Array(xScroll, yScroll);
			return arrayPageScroll;
        }; 
		
		function ___pause(ms)
        {
            var date = new Date();
			curDate = null;
			do 
			{ 
				var curDate = new Date(); 
			}while (curDate - date < ms);
        }; 
		return this.unbind('click').click(_initialize);
    };
})(jQuery);