249 lines
9.5 KiB
JavaScript
249 lines
9.5 KiB
JavaScript
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/**
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* jBox Image plugin: Adds a lightbox to your images
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*
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* Author: Stephan Wagner (https://stephanwagner.me)
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*
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* License: MIT (https://opensource.org/licenses/MIT)
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*
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* Requires: jBox (https://code.jboxcdn.com/jBox.min.js)
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*/
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jQuery(document).ready(function () {
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new jBox.plugin('Image', {
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// Options (https://stephanwagner.me/jBox/options#options-confirm)
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src: 'href', // The attribute where jBox gets the image source from, e.g. href="/path_to_image/image.jpg"
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gallery: 'data-jbox-image', // The attribute to set the galleries, e.g. data-jbox-image="gallery1"
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imageLabel: 'title', // The attribute where jBox gets the image label from, e.g. title="My label"
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imageFade: 360, // The fade duration for images in ms
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imageSize: 'contain', // How to display the images. Use CSS background-position values, e.g. 'cover', 'contain', 'auto', 'initial', '50% 50%'
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imageCounter: false, // Set to true to add an image counter, e.g. 4/20
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imageCounterSeparator: '/', // HTML to separate the current image number from all image numbers, e.g. '/' or ' of '
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target: window,
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attach: '[data-jbox-image]',
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fixed: true,
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blockScroll: true,
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closeOnEsc: true,
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closeOnClick: 'button',
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closeButton: true,
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overlay: true,
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animation: 'zoomIn',
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preventDefault: true,
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width: '100%',
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height: '100%',
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adjustDistance: {
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top: 40,
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right: 5,
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bottom: 40,
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left: 5
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},
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// Triggered when jBox is initialized
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_onInit: function ()
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{
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// Initial images and z-index
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this.images = this.currentImage = {};
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this.imageZIndex = 1;
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// Loop through images, sort and save in global variable
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this.attachedElements && jQuery.each(this.attachedElements, function (index, item)
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{
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item = jQuery(item);
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// Abort if the item was added to a gallery already
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if (item.data('jBox-image-gallery')) return;
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// Add item to a gallery
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var gallery = item.attr(this.options.gallery) || 'default';
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!this.images[gallery] && (this.images[gallery] = []);
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this.images[gallery].push({src: item.attr(this.options.src), label: (item.attr(this.options.imageLabel) || '')});
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// Remove the title attribute so it won't show the browsers tooltip
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this.options.imageLabel == 'title' && item.removeAttr('title');
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// Store data in source element for easy access
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item.data('jBox-image-gallery', gallery);
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item.data('jBox-image-id', (this.images[gallery].length - 1));
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}.bind(this));
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// Helper to inject the image into content area
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var appendImage = function (gallery, id, preload, open, error)
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{
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// Abort if image was appended already
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if (jQuery('#jBox-image-' + gallery + '-' + id).length) return;
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// Create image container
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var image = jQuery('<div/>', {
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id: 'jBox-image-' + gallery + '-' + id,
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'class': 'jBox-image-container' + (error ? ' jBox-image-not-found' : '') + (!open && !preload ? ' jBox-image-' + gallery + '-current' : '')
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}).css({
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backgroundImage: error ? '' : 'url("' + this.images[gallery][id].src + '")',
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backgroundSize: this.options.imageSize,
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opacity: (open ? 1 : 0),
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zIndex: (preload ? 0 : this.imageZIndex++)
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}).appendTo(this.content);
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// Create labels
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jQuery('<div/>', {
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id: 'jBox-image-label-' + gallery + '-' + id,
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'class': 'jBox-image-label' + (open ? ' active' : '')
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}).html(this.images[gallery][id].label).click(function () { $(this).toggleClass('expanded'); }).appendTo(this.imageLabel);
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// Show image
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!open && !preload && image.animate({opacity: 1}, this.options.imageFade);
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}.bind(this);
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// Helper to show new image label
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var showLabel = function (gallery, id)
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{
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jQuery('.jBox-image-label.active').removeClass('active expanded');
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jQuery('#jBox-image-label-' + gallery + '-' + id).addClass('active');
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};
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// Show images when they are loaded or load them if not
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this.showImage = function (img)
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{
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// Get the gallery and the image id from the next or the previous image
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if (img != 'open') {
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var gallery = this.currentImage.gallery;
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var id = this.currentImage.id + (1 * (img == 'prev') ? -1 : 1);
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id = id > (this.images[gallery].length - 1) ? 0 : (id < 0 ? (this.images[gallery].length - 1) : id);
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// Or get image data from source element
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} else {
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var gallery = this.source.data('jBox-image-gallery');
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var id = this.source.data('jBox-image-id');
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// Remove or show the next and prev buttons
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jQuery('.jBox-image-pointer-prev, .jBox-image-pointer-next').css({display: (this.images[gallery].length > 1 ? 'block' : 'none')});
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}
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// If there is a current image already shown, hide it
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if (jQuery('.jBox-image-' + gallery + '-current').length) {
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jQuery('.jBox-image-' + gallery + '-current').removeClass('jBox-image-' + gallery + '-current').animate({opacity: 0}, (img == 'open') ? 0 : this.options.imageFade);
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}
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// Set new current image
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this.currentImage = {gallery: gallery, id: id};
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// Show image if it already exists
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if (jQuery('#jBox-image-' + gallery + '-' + id).length) {
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jQuery('#jBox-image-' + gallery + '-' + id).addClass('jBox-image-' + gallery + '-current').css({zIndex: this.imageZIndex++, opacity: 0}).animate({opacity: 1}, (img == 'open') ? 0 : this.options.imageFade);
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showLabel(gallery, id);
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// Load image
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} else {
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this.wrapper.addClass('jBox-image-loading');
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jQuery('<img src="' + this.images[gallery][id].src + '"/>').each(function ()
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{
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var tmpImg = new Image();
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tmpImg.onload = function ()
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{
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appendImage(gallery, id, false);
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showLabel(gallery, id);
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this.wrapper.removeClass('jBox-image-loading');
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}.bind(this);
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tmpImg.onerror = function () {
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appendImage(gallery, id, false, null, true);
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showLabel(gallery, id);
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this.wrapper.removeClass('jBox-image-loading');
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}.bind(this);
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tmpImg.src = this.images[gallery][id].src;
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}.bind(this));
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}
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// Update the image counter numbers
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if (this.imageCounter) {
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if (this.images[gallery].length > 1) {
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this.wrapper.addClass('jBox-image-has-counter');
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this.imageCounter.find('.jBox-image-counter-all').html(this.images[gallery].length);
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this.imageCounter.find('.jBox-image-counter-current').html(id + 1);
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} else {
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this.wrapper.removeClass('jBox-image-has-counter');
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}
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}
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// Preload next image
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var next_id = id + 1;
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next_id = next_id > (this.images[gallery].length - 1) ? 0 : (next_id < 0 ? (this.images[gallery].length - 1) : next_id);
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(!jQuery('#jBox-image-' + gallery + '-' + next_id).length) && jQuery('<img src="' + this.images[gallery][next_id].src + '"/>').each(function ()
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{
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var tmpImg = new Image();
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tmpImg.onload = function ()
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{
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appendImage(gallery, next_id, true);
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}.bind(this);
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tmpImg.onerror = function ()
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{
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appendImage(gallery, next_id, true, null, true);
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}.bind(this);
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tmpImg.src = this.images[gallery][next_id].src;
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}.bind(this));
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};
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},
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// Triggered when jBox was created
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_onCreated: function ()
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{
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// Append image label containers
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this.imageLabel = jQuery('<div/>', {'class': 'jBox-image-label-container'}).appendTo(this.wrapper);
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this.imageLabel.append(jQuery('<div/>', {'class': 'jBox-image-pointer-prev', click: function () { this.showImage('prev'); }.bind(this)})).append(jQuery('<div/>', {'class': 'jBox-image-pointer-next', click: function () { this.showImage('next'); }.bind(this)}));
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// Creating the image counter containers
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if (this.options.imageCounter) {
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this.imageCounter = jQuery('<div/>', {'class': 'jBox-image-counter-container'}).appendTo(this.wrapper);
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this.imageCounter.append(jQuery('<span/>', {'class': 'jBox-image-counter-current'})).append(jQuery('<span/>').html(this.options.imageCounterSeparator)).append(jQuery('<span/>', {'class': 'jBox-image-counter-all'}));
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}
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},
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// Triggered when jBox opens
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_onOpen: function ()
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{
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// Add key events
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jQuery(document).on('keyup.jBox-Image-' + this.id, function (ev) {
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(ev.keyCode == 37) && this.showImage('prev');
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(ev.keyCode == 39) && this.showImage('next');
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}.bind(this));
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// Load the image from the attached element
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this.showImage('open');
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},
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// Triggered when jBox closes
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_onClose: function ()
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{
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// Remove key events
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jQuery(document).off('keyup.jBox-Image-' + this.id);
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},
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// Triggered when jBox finished closing
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_onCloseComplete: function ()
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{
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// Hide all image containers
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this.wrapper.find('.jBox-image-container').css('opacity', 0);
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}
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});
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});
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