app/assets/javascripts/lightbox.js
/*
Lightbox v2.51
by Lokesh Dhakar - http://www.lokeshdhakar.com
For more information, visit:
http://lokeshdhakar.com/projects/lightbox2/
Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
- free for use in both personal and commercial projects
- attribution requires leaving author name, author link, and the license info intact
Thanks
- Scott Upton(uptonic.com), Peter-Paul Koch(quirksmode.com), and Thomas Fuchs(mir.aculo.us) for ideas, libs, and snippets.
- Artemy Tregubenko (arty.name) for cleanup and help in updating to latest proto-aculous in v2.05.
Table of Contents
=================
LightboxOptions
Lightbox
- constructor
- init
- enable
- build
- start
- changeImage
- sizeContainer
- showImage
- updateNav
- updateDetails
- preloadNeigbhoringImages
- enableKeyboardNav
- disableKeyboardNav
- keyboardAction
- end
options = new LightboxOptions
lightbox = new Lightbox options
*/
(function() {
var $, Lightbox, LightboxOptions;
$ = jQuery;
LightboxOptions = (function() {
function LightboxOptions() {
this.fileLoadingImage = 'assets/loading.gif';
this.fileCloseImage = 'assets/close.png';
this.resizeDuration = 700;
this.fadeDuration = 500;
this.labelImage = "Image";
this.labelOf = "of";
}
return LightboxOptions;
})();
Lightbox = (function() {
function Lightbox(options) {
this.options = options;
this.album = [];
this.currentImageIndex = void 0;
this.init();
}
Lightbox.prototype.init = function() {
this.enable();
return this.build();
};
Lightbox.prototype.enable = function() {
var _this = this;
return $('body').on('click', 'a[rel^=lightbox], area[rel^=lightbox]', function(e) {
_this.start($(e.currentTarget));
return false;
});
};
Lightbox.prototype.build = function() {
var $lightbox,
_this = this;
$("<div>", {
id: 'lightboxOverlay'
}).after($('<div/>', {
id: 'lightbox'
}).append($('<div/>', {
"class": 'lb-outerContainer'
}).append($('<div/>', {
"class": 'lb-container'
}).append($('<img/>', {
"class": 'lb-image'
}), $('<div/>', {
"class": 'lb-nav'
}).append($('<a/>', {
"class": 'lb-prev'
}), $('<a/>', {
"class": 'lb-next'
})), $('<div/>', {
"class": 'lb-loader'
}).append($('<a/>', {
"class": 'lb-cancel'
}).append($('<img/>', {
src: this.options.fileLoadingImage
}))))), $('<div/>', {
"class": 'lb-dataContainer'
}).append($('<div/>', {
"class": 'lb-data'
}).append($('<div/>', {
"class": 'lb-details'
}).append($('<span/>', {
"class": 'lb-caption'
}), $('<span/>', {
"class": 'lb-number'
})), $('<div/>', {
"class": 'lb-closeContainer'
}).append($('<a/>', {
"class": 'lb-close'
}).append($('<img/>', {
src: this.options.fileCloseImage
}))))))).appendTo($('body'));
$('#lightboxOverlay').hide().on('click', function(e) {
_this.end();
return false;
});
$lightbox = $('#lightbox');
$lightbox.hide().on('click', function(e) {
if ($(e.target).attr('id') === 'lightbox') _this.end();
return false;
});
$lightbox.find('.lb-outerContainer').on('click', function(e) {
if ($(e.target).attr('id') === 'lightbox') _this.end();
return false;
});
$lightbox.find('.lb-prev').on('click', function(e) {
_this.changeImage(_this.currentImageIndex - 1);
return false;
});
$lightbox.find('.lb-next').on('click', function(e) {
_this.changeImage(_this.currentImageIndex + 1);
return false;
});
$lightbox.find('.lb-loader, .lb-close').on('click', function(e) {
_this.end();
return false;
});
};
Lightbox.prototype.start = function($link) {
var $lightbox, $window, a, i, imageNumber, left, top, _len, _ref;
$(window).on("resize", this.sizeOverlay);
$('select, object, embed').css({
visibility: "hidden"
});
$('#lightboxOverlay').width($(document).width()).height($(document).height()).fadeIn(this.options.fadeDuration);
this.album = [];
imageNumber = 0;
if ($link.attr('rel') === 'lightbox') {
this.album.push({
link: $link.attr('href'),
title: $link.attr('title')
});
} else {
_ref = $($link.prop("tagName") + '[rel="' + $link.attr('rel') + '"]');
for (i = 0, _len = _ref.length; i < _len; i++) {
a = _ref[i];
this.album.push({
link: $(a).attr('href'),
title: $(a).attr('title')
});
if ($(a).attr('href') === $link.attr('href')) imageNumber = i;
}
}
$window = $(window);
top = $window.scrollTop() + $window.height() / 10;
left = $window.scrollLeft();
$lightbox = $('#lightbox');
$lightbox.css({
top: top + 'px',
left: left + 'px'
}).fadeIn(this.options.fadeDuration);
this.changeImage(imageNumber);
};
Lightbox.prototype.changeImage = function(imageNumber) {
var $image, $lightbox, preloader,
_this = this;
this.disableKeyboardNav();
$lightbox = $('#lightbox');
$image = $lightbox.find('.lb-image');
this.sizeOverlay();
$('#lightboxOverlay').fadeIn(this.options.fadeDuration);
$('.loader').fadeIn('slow');
$lightbox.find('.lb-image, .lb-nav, .lb-prev, .lb-next, .lb-dataContainer, .lb-numbers, .lb-caption').hide();
$lightbox.find('.lb-outerContainer').addClass('animating');
preloader = new Image;
preloader.onload = function() {
$image.attr('src', _this.album[imageNumber].link);
$image.width = preloader.width;
$image.height = preloader.height;
return _this.sizeContainer(preloader.width, preloader.height);
};
preloader.src = this.album[imageNumber].link;
this.currentImageIndex = imageNumber;
};
Lightbox.prototype.sizeOverlay = function() {
return $('#lightboxOverlay').width($(document).width()).height($(document).height());
};
Lightbox.prototype.sizeContainer = function(imageWidth, imageHeight) {
var $container, $lightbox, $outerContainer, containerBottomPadding, containerLeftPadding, containerRightPadding, containerTopPadding, newHeight, newWidth, oldHeight, oldWidth,
_this = this;
$lightbox = $('#lightbox');
$outerContainer = $lightbox.find('.lb-outerContainer');
oldWidth = $outerContainer.outerWidth();
oldHeight = $outerContainer.outerHeight();
$container = $lightbox.find('.lb-container');
containerTopPadding = parseInt($container.css('padding-top'), 10);
containerRightPadding = parseInt($container.css('padding-right'), 10);
containerBottomPadding = parseInt($container.css('padding-bottom'), 10);
containerLeftPadding = parseInt($container.css('padding-left'), 10);
newWidth = imageWidth + containerLeftPadding + containerRightPadding;
newHeight = imageHeight + containerTopPadding + containerBottomPadding;
if (newWidth !== oldWidth && newHeight !== oldHeight) {
$outerContainer.animate({
width: newWidth,
height: newHeight
}, this.options.resizeDuration, 'swing');
} else if (newWidth !== oldWidth) {
$outerContainer.animate({
width: newWidth
}, this.options.resizeDuration, 'swing');
} else if (newHeight !== oldHeight) {
$outerContainer.animate({
height: newHeight
}, this.options.resizeDuration, 'swing');
}
setTimeout(function() {
$lightbox.find('.lb-dataContainer').width(newWidth);
$lightbox.find('.lb-prevLink').height(newHeight);
$lightbox.find('.lb-nextLink').height(newHeight);
_this.showImage();
}, this.options.resizeDuration);
};
Lightbox.prototype.showImage = function() {
var $lightbox;
$lightbox = $('#lightbox');
$lightbox.find('.lb-loader').hide();
$lightbox.find('.lb-image').fadeIn('slow');
this.updateNav();
this.updateDetails();
this.preloadNeighboringImages();
this.enableKeyboardNav();
};
Lightbox.prototype.updateNav = function() {
var $lightbox;
$lightbox = $('#lightbox');
$lightbox.find('.lb-nav').show();
if (this.currentImageIndex > 0) $lightbox.find('.lb-prev').show();
if (this.currentImageIndex < this.album.length - 1) {
$lightbox.find('.lb-next').show();
}
};
Lightbox.prototype.updateDetails = function() {
var $lightbox,
_this = this;
$lightbox = $('#lightbox');
if (typeof this.album[this.currentImageIndex].title !== 'undefined' && this.album[this.currentImageIndex].title !== "") {
$lightbox.find('.lb-caption').html(this.album[this.currentImageIndex].title).fadeIn('fast');
}
if (this.album.length > 1) {
$lightbox.find('.lb-number').html(this.options.labelImage + ' ' + (this.currentImageIndex + 1) + ' ' + this.options.labelOf + ' ' + this.album.length).fadeIn('fast');
} else {
$lightbox.find('.lb-number').hide();
}
$lightbox.find('.lb-outerContainer').removeClass('animating');
$lightbox.find('.lb-dataContainer').fadeIn(this.resizeDuration, function() {
return _this.sizeOverlay();
});
};
Lightbox.prototype.preloadNeighboringImages = function() {
var preloadNext, preloadPrev;
if (this.album.length > this.currentImageIndex + 1) {
preloadNext = new Image;
preloadNext.src = this.album[this.currentImageIndex + 1].link;
}
if (this.currentImageIndex > 0) {
preloadPrev = new Image;
preloadPrev.src = this.album[this.currentImageIndex - 1].link;
}
};
Lightbox.prototype.enableKeyboardNav = function() {
$(document).on('keyup.keyboard', $.proxy(this.keyboardAction, this));
};
Lightbox.prototype.disableKeyboardNav = function() {
$(document).off('.keyboard');
};
Lightbox.prototype.keyboardAction = function(event) {
var KEYCODE_ESC, KEYCODE_LEFTARROW, KEYCODE_RIGHTARROW, key, keycode;
KEYCODE_ESC = 27;
KEYCODE_LEFTARROW = 37;
KEYCODE_RIGHTARROW = 39;
keycode = event.keyCode;
key = String.fromCharCode(keycode).toLowerCase();
if (keycode === KEYCODE_ESC || key.match(/x|o|c/)) {
this.end();
} else if (key === 'p' || keycode === KEYCODE_LEFTARROW) {
if (this.currentImageIndex !== 0) {
this.changeImage(this.currentImageIndex - 1);
}
} else if (key === 'n' || keycode === KEYCODE_RIGHTARROW) {
if (this.currentImageIndex !== this.album.length - 1) {
this.changeImage(this.currentImageIndex + 1);
}
}
};
Lightbox.prototype.end = function() {
this.disableKeyboardNav();
$(window).off("resize", this.sizeOverlay);
$('#lightbox').fadeOut(this.options.fadeDuration);
$('#lightboxOverlay').fadeOut(this.options.fadeDuration);
return $('select, object, embed').css({
visibility: "visible"
});
};
return Lightbox;
})();
$(function() {
var lightbox, options;
options = new LightboxOptions;
return lightbox = new Lightbox(options);
});
}).call(this);