/**
* 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.png', // (string) Path and the name of the prev button image
imageBtnNext: 'images/lightbox-btn-next.png', // (string) Path and the name of the next button image
imageBtnClose: 'images/lightbox-btn-close.png', // (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'),objClicked.getAttribute('alt')));
} 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'),jQueryMatchedObj[i].getAttribute('alt')));
}
}
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:
*
*/
function _set_interface() {
// Apply the HTML markup into body tag
$('body').append('');
// 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) });
$('#lightbox-url-num').css({ top: (intImageHeight - (settings.containerBorderSize * 2))/2 -80});
$('#lightbox-url-num').css({ left: (intImageWidth - (settings.containerBorderSize * 2))/2 -100});
};
/**
* 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').show();
if ( settings.imageArray[settings.activeImage][1] ) {
$('#lightbox-image-details-caption').html(settings.imageArray[settings.activeImage][1]).show();
}
if ( settings.imageArray[settings.activeImage][1] ) {
$('#lightbox-url-num').attr('href',settings.imageArray[settings.activeImage][2]);
number = settings.imageArray[settings.activeImage][1].split(" - ");
$('#lightbox-url-num').html(number[0]).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 40% 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 40% 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 40% 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 40% 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
