//File #twhbtf88-5047 - JAVASCRIPT - Sourcecode
//Uploaded by Sunimal Kaluarachchi - 20/06/2011 17:44 - 193 Views


    /**

     * 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 CCAttribution-ShareAlike 2.5 Brazil - http://creativecommons.org/licenses/by-sa/2.5/br/deed.en_US

     * @example Visit http://leandrovieira.com/projects/jquery/lightbox/ for more informations about this jQuery plugin

     */

     

    // This Javascript file was modified by Sunimal Kaluarachchi (ksunimal@aol.com) to display images within the Viewport. 

    // In Leandro Vieira Pinho's version, large images would jump out of the screen (Viewport). This version adjusts the image size 

    // without losing the aspect ratio and displays the image within the Viewport. 

    // File modification completed and tested on June 20th, 2011 by Sunimal Kaluarachchi - ksunimal@aol.com

     

    // Offering a Custom Alias suport - More info: http://docs.jquery.com/Plugins/Authoring#Custom_Alias

    (function($) {

    	/**

    	 * $ is an alias to jQuery object

    	 *

    	 */

    	$.fn.lightBox = function(settings) {

    		// Settings to configure the jQuery lightBox plugin how you like

    		settings = jQuery.extend({

    			// Configuration related to overlay

    			overlayBgColor: 		'#000',		// (string) Background color to overlay; inform a hexadecimal value like: #RRGGBB. Where RR, GG, and BB are the hexadecimal values for the red, green, and blue values of the color.

    			overlayOpacity:			0.8,		// (integer) Opacity value to overlay; inform: 0.X. Where X are number from 0 to 9

    			// Configuration related to navigation

    			fixedNavigation:		false,		// (boolean) Boolean that informs if the navigation (next and prev button) will be fixed or not in the interface.

    			// Configuration related to images

    			imageLoading:			'images/lightbox-ico-loading.gif',		// (string) Path and the name of the loading icon

    			imageBtnPrev:			'images/lightbox-btn-prev.gif',			// (string) Path and the name of the prev button image

    			imageBtnNext:			'images/lightbox-btn-next.gif',			// (string) Path and the name of the next button image

    			imageBtnClose:			'images/lightbox-btn-close.gif',		// (string) Path and the name of the close btn

    			imageBlank:				'images/lightbox-blank.gif',			// (string) Path and the name of a blank image (one pixel)

    			// Configuration related to container image box

    			containerBorderSize:	10,			// (integer) If you adjust the padding in the CSS for the container, #lightbox-container-image-box, you will need to update this value

    			containerResizeSpeed:	400,		// (integer) Specify the resize duration of container image. These number are miliseconds. 400 is default.

    			// Configuration related to texts in caption. For example: Image 2 of 8. You can alter either "Image" and "of" texts.

    			txtImage:				'Image',	// (string) Specify text "Image"

    			txtOf:					'of',		// (string) Specify text "of"

    			// Configuration related to keyboard navigation

    			keyToClose:				'c',		// (string) (c = close) Letter to close the jQuery lightBox interface. Beyond this letter, the letter X and the SCAPE key is used to.

    			keyToPrev:				'p',		// (string) (p = previous) Letter to show the previous image

    			keyToNext:				'n',		// (string) (n = next) Letter to show the next image.

    			// Donīt alter these variables in any way

    			imageArray:				[],

    			activeImage:			0

    		},settings);

    		// Caching the jQuery object with all elements matched

    		var jQueryMatchedObj = this; // This, in this context, refer to jQuery object

    		var viewPortDimensions = ___getPageSize(); // Added by Sunimal Kaluarachchi to obtain Width and Height of current computer's screen (Viewport)

    		/**

    		 * Initializing the plugin calling the start function

    		 *

    		 * @return boolean false

    		 */

    		function _initialize() {

    			_start(this,jQueryMatchedObj); // This, in this context, refer to object (link) which the user have clicked

    			return false; // Avoid the browser following the link

    		}

    		/**

    		 * Start the jQuery lightBox plugin

    		 *

    		 * @param object objClicked The object (link) whick the user have clicked

    		 * @param object jQueryMatchedObj The jQuery object with all elements matched

    		 */

    		function _start(objClicked,jQueryMatchedObj) {

    			// Hime some elements to avoid conflict with overlay in IE. These elements appear above the overlay.

    			$('embed, object, select').css({ 'visibility' : 'hidden' });

    			// Call the function to create the markup structure; style some elements; assign events in some elements.

    			_set_interface();

    			// Unset total images in imageArray

    			settings.imageArray.length = 0;

    			// Unset image active information

    			settings.activeImage = 0;

    			// We have an image set? Or just an image? Letīs see it.

    			if ( jQueryMatchedObj.length == 1 ) {

    				settings.imageArray.push(new Array(objClicked.getAttribute('href'),objClicked.getAttribute('title')));

    			} else {

    				// Add an Array (as many as we have), with href and title atributes, inside the Array that storage the images references		

    				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++;

    			}

    			// Call the function that prepares image exibition

    			_set_image_to_view();

    		}

    		/**

    		 * Create the jQuery lightBox plugin interface

    		 *

    		 * The HTML markup will be like that:

    			<div id="jquery-overlay"></div>

    			<div id="jquery-lightbox">

    				<div id="lightbox-container-image-box">

    					<div id="lightbox-container-image">

    						<img src="../fotos/XX.jpg" id="lightbox-image">

    						<div 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="../images/lightbox-ico-loading.gif">

    							</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="../images/lightbox-btn-close.gif">

    							</a>

    						</div>

    					</div>

    				</div>

    			</div>

    		 *

    		 */

    		function _set_interface() {

    			// Apply the HTML markup into body tag

    			$('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>');	

    			// Get page sizes

    			var arrPageSizes = ___getPageSize();

    			// Style overlay and show it

    			$('#jquery-overlay').css({

    				backgroundColor:	settings.overlayBgColor,

    				opacity:			settings.overlayOpacity,

    				width:				arrPageSizes[0],

    				height:				arrPageSizes[1]

    			}).fadeIn();

    			// Get page scroll

    			var arrPageScroll = ___getPageScroll();

    			// Calculate top and left offset for the jquery-lightbox div object and show it

    			$('#jquery-lightbox').css({

     

    				// top: Display lightbox 5% of viewport size. Eg: if Viewport height is 653px, then the lightbox will be displayed 5% of the Viewport Height from top. 5% of Viewport height is around 32px. So the lightbox will be displayed 32px down from the "top" -   Sunimal Kaluarachchi 

    				top:	arrPageScroll[1] + (arrPageSizes[3] * (5/100)),

    				left:	arrPageScroll[0]

    			}).show();

    			// Assigning click events in elements to close overlay

    			$('#jquery-overlay,#jquery-lightbox').click(function() {

    				_finish();									

    			});

    			// Assign the _finish function to lightbox-loading-link and lightbox-secNav-btnClose objects

    			$('#lightbox-loading-link,#lightbox-secNav-btnClose').click(function() {

    				_finish();

    				return false;

    			});

    			// If window was resized, calculate the new overlay dimensions

    			$(window).resize(function() {

    				// Get page sizes

    				var arrPageSizes = ___getPageSize();

    				// Style overlay and show it

    				$('#jquery-overlay').css({

    					width:		arrPageSizes[0],

    					height:		arrPageSizes[1]

    				});

    				// Get page scroll

    				var arrPageScroll = ___getPageScroll();

    				// Calculate top and left offset for the jquery-lightbox div object and show it

    				$('#jquery-lightbox').css({

     

    					// top: Display lightbox 5% of viewport size. Eg: if Viewport height is 653px, then the lightbox will be displayed 5% of the Viewport Height from top. 5% of Viewport height is around 32px. So the lightbox will be displayed 32px down from the "top" - IF User has scrolled down -   Sunimal Kaluarachchi 

    					top:	arrPageScroll[1] + (arrPageSizes[3] * (5/100)),

    					left:	arrPageScroll[0]

    				});

    			});

    		}

    		/**

    		 * Prepares image exibition; doing a imageīs preloader to calculate itīs size

    		 *

    		 */

    		function _set_image_to_view() { // show the loading

    			// Show the loading

    			$('#lightbox-loading').show();

    			if ( settings.fixedNavigation ) {

    				$('#lightbox-image,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();

    			} else {

    				// Hide some elements

    				$('#lightbox-image,#lightbox-nav,#lightbox-nav-btnPrev,#lightbox-nav-btnNext,#lightbox-container-image-data-box,#lightbox-image-details-currentNumber').hide();

    			}

    			// Image preload process

    			var objImagePreloader = new Image();

    			objImagePreloader.onload = function() {

    				$('#lightbox-image').attr('src',settings.imageArray[settings.activeImage][0]);				

     

    				var arrNewImgDimension = ___calculateImageDimension(viewPortDimensions[2], viewPortDimensions[3], objImagePreloader.width, objImagePreloader.height); // Sunimal Kaluarachchi

     

    				// Perfomance an effect in the image container resizing it				

    				_resize_container_image_box(arrNewImgDimension[0],arrNewImgDimension[1]); // Arguments added by Sunimal Kaluarachchi

     

     

    				//	clear onLoad, IE behaves irratically with animated gifs otherwise

    				objImagePreloader.onload=function(){};

    			};

    			objImagePreloader.src = settings.imageArray[settings.activeImage][0];

    		};

    		/**

    		 * Perfomance an effect in the image container resizing it

    		 *

    		 * @param integer intImageWidth The imageīs width that will be showed

    		 * @param integer intImageHeight The imageīs height that will be showed

    		 */

    		function _resize_container_image_box(intImageWidth,intImageHeight) {

    			// Get current width and height

    			var intCurrentWidth = $('#lightbox-container-image-box').width();

    			var intCurrentHeight = $('#lightbox-container-image-box').height();

    			// Get the width and height of the selected image plus the padding

    			var intWidth = (intImageWidth + (settings.containerBorderSize * 2)); // Plus the imageīs width and the left and right padding value

    			var intHeight = (intImageHeight + (settings.containerBorderSize * 2)); // Plus the imageīs height and the left and right padding value

    			// Diferences

    			var intDiffW = intCurrentWidth - intWidth;

    			var intDiffH = intCurrentHeight - intHeight;

     

    			$('#lightbox-image').height(intImageHeight);   // Sunimal Kaluarachchi

    			$('#lightbox-image').width(intImageWidth); 	// Sunimal Kaluarachchi 

     

     

     

    			// Perfomance the effect

    			$('#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) });

    		};

    		/**

    		 * Show the prepared image

    		 *

    		 */

    		function _show_image() {

    			$('#lightbox-loading').hide();

    			$('#lightbox-image').fadeIn(function() {

    				_show_image_data();

    				_set_navigation();

    			});

    			_preload_neighbor_images();

    		};

    		/**

    		 * Show the image information

    		 *

    		 */

    		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 we have a image set, display 'Image X of X'

    			if ( settings.imageArray.length > 1 ) {

    				$('#lightbox-image-details-currentNumber').html(settings.txtImage + ' ' + ( settings.activeImage + 1 ) + ' ' + settings.txtOf + ' ' + settings.imageArray.length).show();

    			}		

    		}

    		/**

    		 * Display the button navigations

    		 *

    		 */

    		function _set_navigation() {

    			$('#lightbox-nav').show();

     

    			// Instead to define this configuration in CSS file, we define here. And itīs need to IE. Just.

    			$('#lightbox-nav-btnPrev,#lightbox-nav-btnNext').css({ 'background' : 'transparent url(' + settings.imageBlank + ') no-repeat' });

     

    			// Show the prev button, if not the first image in set

    			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 {

    					// Show the images button for Next buttons

    					$('#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;

    					});

    				}

    			}

     

    			// Show the next button, if not the last image in set

    			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 {

    					// Show the images button for Next buttons

    					$('#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

    			_enable_keyboard_navigation();

    		}

    		/**

    		 * Enable a support to keyboard navigation

    		 *

    		 */

    		function _enable_keyboard_navigation() {

    			$(document).keydown(function(objEvent) {

    				_keyboard_action(objEvent);

    			});

    		}

    		/**

    		 * Disable the support to keyboard navigation

    		 *

    		 */

    		function _disable_keyboard_navigation() {

    			$(document).unbind();

    		}

    		/**

    		 * Perform the keyboard actions

    		 *

    		 */

    		function _keyboard_action(objEvent) {

    			// To ie

    			if ( objEvent == null ) {

    				keycode = event.keyCode;

    				escapeKey = 27;

    			// To Mozilla

    			} else {

    				keycode = objEvent.keyCode;

    				escapeKey = objEvent.DOM_VK_ESCAPE;

    			}

    			// Get the key in lower case form

    			key = String.fromCharCode(keycode).toLowerCase();

    			// Verify the keys to close the ligthBox

    			if ( ( key == settings.keyToClose ) || ( key == 'x' ) || ( keycode == escapeKey ) ) {

    				_finish();

    			}

    			// Verify the key to show the previous image

    			if ( ( key == settings.keyToPrev ) || ( keycode == 37 ) ) {

    				// If weīre not showing the first image, call the previous

    				if ( settings.activeImage != 0 ) {

    					settings.activeImage = settings.activeImage - 1;

    					_set_image_to_view();

    					_disable_keyboard_navigation();

    				}

    			}

    			// Verify the key to show the next image

    			if ( ( key == settings.keyToNext ) || ( keycode == 39 ) ) {

    				// If weīre not showing the last image, call the next

    				if ( settings.activeImage != ( settings.imageArray.length - 1 ) ) {

    					settings.activeImage = settings.activeImage + 1;

    					_set_image_to_view();

    					_disable_keyboard_navigation();

    				}

    			}

    		}

    		/**

    		 * Preload prev and next images being showed

    		 *

    		 */

    		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];

    			}

    		}

    		/**

    		 * Remove jQuery lightBox plugin HTML markup

    		 *

    		 */

    		function _finish() {

    			$('#jquery-lightbox').remove();

    			$('#jquery-overlay').fadeOut(function() { $('#jquery-overlay').remove(); });

    			// Show some elements to avoid conflict with overlay in IE. These elements appear above the overlay.

    			$('embed, object, select').css({ 'visibility' : 'visible' });

    		}

    		/**

    		 / THIRD FUNCTION

    		 * getPageSize() by quirksmode.com

    		 *

    		 * @return Array Return an array with page width, height and window width, height

    		 */

    		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){ // 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;

    			}

    			arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight);

    			return arrayPageSize;

    		};

    		/**

    		 / THIRD FUNCTION

    		 * getPageScroll() by quirksmode.com

    		 *

    		 * @return Array Return an array with x,y page scroll values.

    		 */

    		function ___getPageScroll() {

    			var xScroll, yScroll;

    			if (self.pageYOffset) {

    				yScroll = self.pageYOffset;

    				xScroll = self.pageXOffset;

    			} else if (document.documentElement && document.documentElement.scrollTop) {	 // Explorer 6 Strict

    				yScroll = document.documentElement.scrollTop;

    				xScroll = document.documentElement.scrollLeft;

    			} else if (document.body) {// all other Explorers

    				yScroll = document.body.scrollTop;

    				xScroll = document.body.scrollLeft;	

    			}

    			arrayPageScroll = new Array(xScroll,yScroll);

    			return arrayPageScroll;

    		};

     

    		// Most important function '___calculateImageDimension'. This will resize the image height and width to fit into the

    		// screen (Viewport) without losing the aspect ratio - Sunimal Kaluarachchi

    		function ___calculateImageDimension(viewPortWidth, viewPortHeight, imageWidth, imageHeight)  

    		{

    			// obtain 82% of ViewPort Height

    			var viewPortHeightPercent = viewPortHeight * (82/100);

     

    			var newImageHeight = imageHeight;

    			var newImageWidth = imageWidth;

    			var newViewPortWidth = viewPortWidth;

    			var scaleHeight =0;

    			var scaleWidth = 0;

     

    			if ( newViewPortWidth > viewPortHeight ) // if viewport width > viewport height

    			{

    				// Get 80% of current viewport width so the image width will be displayed within this 80% of viewport width size

    				newViewPortWidth = viewPortWidth * (80/100);

    			}

     

    			// image width check

    			if ( newImageWidth > newViewPortWidth )

    			{

    				newImageWidth = newViewPortWidth;				

    				scaleWidth = imageHeight/imageWidth;				

    				newImageHeight = scaleWidth * newImageWidth;				

    			}

    			// image height check

    			if ( newImageHeight > viewPortHeightPercent )

    			{

    				newImageHeight = viewPortHeightPercent;				

    				//calculate scale to set width

    				scaleHeight = imageWidth/imageHeight;				

    				newImageWidth = scaleHeight * newImageHeight;	

    			}

    			arrayNewImageSize = new Array(newImageWidth,newImageHeight);

    			return arrayNewImageSize;			

    		}

    		 /**

    		  * Stop the code execution from a escified time in milisecond

    		  *

    		  */

    		 function ___pause(ms) {

    			var date = new Date(); 

    			curDate = null;

    			do { var curDate = new Date(); }

    			while ( curDate - date < ms);

    		 };

    		// Return the jQuery object for chaining. The unbind method is used to avoid click conflict when the plugin is called more than once

    		return this.unbind('click').click(_initialize);

    	};

    })(jQuery); // Call and execute the function immediately passing the jQuery object

