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jquery.lightbox.js
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jquery.lightbox.js
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/*!
* jquery.lightbox.js
* https://github.com/duncanmcdougall/Responsive-Lightbox
* Copyright 2013 Duncan McDougall and other contributors; @license Creative Commons Attribution 2.5
*
* Options:
* margin - int - default 50. Minimum margin around the image
* nav - bool - default true. enable navigation
* blur - bool - default true. Blur other content when open using css filter
* minSize - int - default 0. Min window width or height to open lightbox. Below threshold will open image in a new tab.
*
*/
(function ($) {
'use strict';
$.fn.lightbox = function (options) {
var opts = {
margin: 50,
nav: true,
blur: true,
minSize: 0
};
var plugin = {
items: [],
lightbox: null,
image: null,
current: null,
locked: false,
caption: null,
init: function (items) {
plugin.items = items;
plugin.selector = "lightbox-"+Math.random().toString().replace('.','');
var id = 'lightbox-' + Math.floor((Math.random() * 100000) + 1);
if (!plugin.lightbox) {
$('body').append(
'<div id="'+id+'" class="lightbox" style="display:none;">'+
'<a href="#" class="lightbox-close lightbox-button"></a>' +
'<div class="lightbox-nav">'+
'<a href="#" class="lightbox-previous lightbox-button"></a>' +
'<a href="#" class="lightbox-next lightbox-button"></a>' +
'</div>' +
'<div href="#" class="lightbox-caption"><p></p></div>' +
'</div>'
);
plugin.lightbox = $("#"+id);
plugin.caption = $('.lightbox-caption', plugin.lightbox);
}
if (plugin.items.length > 1 && opts.nav) {
$('.lightbox-nav', plugin.lightbox).show();
} else {
$('.lightbox-nav', plugin.lightbox).hide();
}
plugin.bindEvents();
},
loadImage: function () {
if(opts.blur) {
$("body").addClass("blurred");
}
$("img", plugin.lightbox).remove();
plugin.lightbox.fadeIn('fast').append('<span class="lightbox-loading"></span>');
var img = $('<img src="' + $(plugin.current).attr('href') + '" draggable="false">');
$(img).load(function () {
$('.lightbox-loading').remove();
plugin.lightbox.append(img);
plugin.image = $("img", plugin.lightbox).hide();
plugin.resizeImage();
plugin.setCaption();
});
},
setCaption: function () {
var caption = $(plugin.current).data('caption');
if(!!caption && caption.length > 0) {
plugin.caption.fadeIn();
$('p', plugin.caption).text(caption);
}else{
plugin.caption.hide();
}
},
resizeImage: function () {
var ratio, wHeight, wWidth, iHeight, iWidth;
wHeight = $(window).height() - opts.margin;
wWidth = $(window).outerWidth(true) - opts.margin;
plugin.image.width('').height('');
iHeight = plugin.image.height();
iWidth = plugin.image.width();
if (iWidth > wWidth) {
ratio = wWidth / iWidth;
iWidth = wWidth;
iHeight = Math.round(iHeight * ratio);
}
if (iHeight > wHeight) {
ratio = wHeight / iHeight;
iHeight = wHeight;
iWidth = Math.round(iWidth * ratio);
}
plugin.image.width(iWidth).height(iHeight).css({
'top': ($(window).height() - plugin.image.outerHeight()) / 2 + 'px',
'left': ($(window).width() - plugin.image.outerWidth()) / 2 + 'px'
}).show();
plugin.locked = false;
},
getCurrentIndex: function () {
return $.inArray(plugin.current, plugin.items);
},
next: function () {
if (plugin.locked) {
return false;
}
plugin.locked = true;
if (plugin.getCurrentIndex() >= plugin.items.length - 1) {
$(plugin.items[0]).click();
} else {
$(plugin.items[plugin.getCurrentIndex() + 1]).click();
}
},
previous: function () {
if (plugin.locked) {
return false;
}
plugin.locked = true;
if (plugin.getCurrentIndex() <= 0) {
$(plugin.items[plugin.items.length - 1]).click();
} else {
$(plugin.items[plugin.getCurrentIndex() - 1]).click();
}
},
bindEvents: function () {
$(plugin.items).click(function (e) {
if(!plugin.lightbox.is(":visible") && ($(window).width() < opts.minSize || $(window).height() < opts.minSize)) {
$(this).attr("target", "_blank");
return;
}
var self = $(this)[0];
e.preventDefault();
plugin.current = self;
plugin.loadImage();
// Bind Keyboard Shortcuts
$(document).on('keydown', function (e) {
// Close lightbox with ESC
if (e.keyCode === 27) {
plugin.close();
}
// Go to next image pressing the right key
if (e.keyCode === 39) {
plugin.next();
}
// Go to previous image pressing the left key
if (e.keyCode === 37) {
plugin.previous();
}
});
});
// Add click state on overlay background only
plugin.lightbox.on('click', function (e) {
if (this === e.target) {
plugin.close();
}
});
// Previous click
$(plugin.lightbox).on('click', '.lightbox-previous', function () {
plugin.previous();
return false;
});
// Next click
$(plugin.lightbox).on('click', '.lightbox-next', function () {
plugin.next();
return false;
});
// Close click
$(plugin.lightbox).on('click', '.lightbox-close', function () {
plugin.close();
return false;
});
$(window).resize(function () {
if (!plugin.image) {
return;
}
plugin.resizeImage();
});
},
close: function () {
$(document).off('keydown'); // Unbind all key events each time the lightbox is closed
$(plugin.lightbox).fadeOut('fast');
$('body').removeClass('blurred');
}
};
$.extend(opts, options);
plugin.init(this);
};
})(jQuery);