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629 lines
22 KiB
629 lines
22 KiB
4 years ago
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/**
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* Featherlight - ultra slim jQuery lightbox
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* Version 1.7.9 - http://noelboss.github.io/featherlight/
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*
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* Copyright 2017, Noël Raoul Bossart (http://www.noelboss.com)
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* MIT Licensed.
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**/
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(function($) {
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"use strict";
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if('undefined' === typeof $) {
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if('console' in window){ window.console.info('Too much lightness, Featherlight needs jQuery.'); }
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return;
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}
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/* Featherlight is exported as $.featherlight.
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It is a function used to open a featherlight lightbox.
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[tech]
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Featherlight uses prototype inheritance.
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Each opened lightbox will have a corresponding object.
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That object may have some attributes that override the
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prototype's.
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Extensions created with Featherlight.extend will have their
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own prototype that inherits from Featherlight's prototype,
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thus attributes can be overriden either at the object level,
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or at the extension level.
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To create callbacks that chain themselves instead of overriding,
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use chainCallbacks.
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For those familiar with CoffeeScript, this correspond to
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Featherlight being a class and the Gallery being a class
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extending Featherlight.
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The chainCallbacks is used since we don't have access to
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CoffeeScript's `super`.
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*/
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function Featherlight($content, config) {
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if(this instanceof Featherlight) { /* called with new */
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this.id = Featherlight.id++;
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this.setup($content, config);
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this.chainCallbacks(Featherlight._callbackChain);
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} else {
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var fl = new Featherlight($content, config);
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fl.open();
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return fl;
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}
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}
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var opened = [],
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pruneOpened = function(remove) {
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opened = $.grep(opened, function(fl) {
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return fl !== remove && fl.$instance.closest('body').length > 0;
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} );
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return opened;
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};
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// Removes keys of `set` from `obj` and returns the removed key/values.
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function slice(obj, set) {
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var r = {};
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for (var key in obj) {
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if (key in set) {
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r[key] = obj[key];
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delete obj[key];
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}
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}
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return r;
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}
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// NOTE: List of available [iframe attributes](https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe).
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var iFrameAttributeSet = {
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allowfullscreen: 1, frameborder: 1, height: 1, longdesc: 1, marginheight: 1, marginwidth: 1,
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name: 1, referrerpolicy: 1, scrolling: 1, sandbox: 1, src: 1, srcdoc: 1, width: 1
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};
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// Converts camelCased attributes to dasherized versions for given prefix:
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// parseAttrs({hello: 1, hellFrozeOver: 2}, 'hell') => {froze-over: 2}
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function parseAttrs(obj, prefix) {
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var attrs = {},
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regex = new RegExp('^' + prefix + '([A-Z])(.*)');
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for (var key in obj) {
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var match = key.match(regex);
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if (match) {
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var dasherized = (match[1] + match[2].replace(/([A-Z])/g, '-$1')).toLowerCase();
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attrs[dasherized] = obj[key];
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}
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}
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return attrs;
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}
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/* document wide key handler */
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var eventMap = { keyup: 'onKeyUp', resize: 'onResize' };
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var globalEventHandler = function(event) {
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$.each(Featherlight.opened().reverse(), function() {
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if (!event.isDefaultPrevented()) {
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if (false === this[eventMap[event.type]](event)) {
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event.preventDefault(); event.stopPropagation(); return false;
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}
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}
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});
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};
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var toggleGlobalEvents = function(set) {
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if(set !== Featherlight._globalHandlerInstalled) {
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Featherlight._globalHandlerInstalled = set;
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var events = $.map(eventMap, function(_, name) { return name+'.'+Featherlight.prototype.namespace; } ).join(' ');
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$(window)[set ? 'on' : 'off'](events, globalEventHandler);
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}
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};
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Featherlight.prototype = {
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constructor: Featherlight,
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/*** defaults ***/
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/* extend featherlight with defaults and methods */
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namespace: 'featherlight', /* Name of the events and css class prefix */
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targetAttr: 'data-featherlight', /* Attribute of the triggered element that contains the selector to the lightbox content */
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variant: null, /* Class that will be added to change look of the lightbox */
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resetCss: false, /* Reset all css */
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background: null, /* Custom DOM for the background, wrapper and the closebutton */
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openTrigger: 'click', /* Event that triggers the lightbox */
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closeTrigger: 'click', /* Event that triggers the closing of the lightbox */
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filter: null, /* Selector to filter events. Think $(...).on('click', filter, eventHandler) */
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root: 'body', /* Where to append featherlights */
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openSpeed: 250, /* Duration of opening animation */
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closeSpeed: 250, /* Duration of closing animation */
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closeOnClick: 'background', /* Close lightbox on click ('background', 'anywhere' or false) */
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closeOnEsc: true, /* Close lightbox when pressing esc */
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closeIcon: '✕', /* Close icon */
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loading: '', /* Content to show while initial content is loading */
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persist: false, /* If set, the content will persist and will be shown again when opened again. 'shared' is a special value when binding multiple elements for them to share the same content */
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otherClose: null, /* Selector for alternate close buttons (e.g. "a.close") */
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beforeOpen: $.noop, /* Called before open. can return false to prevent opening of lightbox. Gets event as parameter, this contains all data */
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beforeContent: $.noop, /* Called when content is loaded. Gets event as parameter, this contains all data */
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beforeClose: $.noop, /* Called before close. can return false to prevent opening of lightbox. Gets event as parameter, this contains all data */
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afterOpen: $.noop, /* Called after open. Gets event as parameter, this contains all data */
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afterContent: $.noop, /* Called after content is ready and has been set. Gets event as parameter, this contains all data */
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afterClose: $.noop, /* Called after close. Gets event as parameter, this contains all data */
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onKeyUp: $.noop, /* Called on key up for the frontmost featherlight */
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onResize: $.noop, /* Called after new content and when a window is resized */
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type: null, /* Specify type of lightbox. If unset, it will check for the targetAttrs value. */
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contentFilters: ['jquery', 'image', 'html', 'ajax', 'iframe', 'text'], /* List of content filters to use to determine the content */
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/*** methods ***/
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/* setup iterates over a single instance of featherlight and prepares the background and binds the events */
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setup: function(target, config){
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/* all arguments are optional */
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if (typeof target === 'object' && target instanceof $ === false && !config) {
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config = target;
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target = undefined;
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}
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var self = $.extend(this, config, {target: target}),
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css = !self.resetCss ? self.namespace : self.namespace+'-reset', /* by adding -reset to the classname, we reset all the default css */
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$background = $(self.background || [
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'<div class="'+css+'-loading '+css+'">',
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'<div class="'+css+'-content">',
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'<button class="'+css+'-close-icon '+ self.namespace + '-close" aria-label="Close">',
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self.closeIcon,
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'</button>',
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'<div class="'+self.namespace+'-inner">' + self.loading + '</div>',
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'</div>',
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'</div>'].join('')),
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closeButtonSelector = '.'+self.namespace+'-close' + (self.otherClose ? ',' + self.otherClose : '');
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self.$instance = $background.clone().addClass(self.variant); /* clone DOM for the background, wrapper and the close button */
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/* close when click on background/anywhere/null or closebox */
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self.$instance.on(self.closeTrigger+'.'+self.namespace, function(event) {
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var $target = $(event.target);
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if( ('background' === self.closeOnClick && $target.is('.'+self.namespace))
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|| 'anywhere' === self.closeOnClick
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|| $target.closest(closeButtonSelector).length ){
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self.close(event);
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event.preventDefault();
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}
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});
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return this;
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},
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/* this method prepares the content and converts it into a jQuery object or a promise */
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getContent: function(){
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if(this.persist !== false && this.$content) {
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return this.$content;
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}
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var self = this,
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filters = this.constructor.contentFilters,
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readTargetAttr = function(name){ return self.$currentTarget && self.$currentTarget.attr(name); },
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targetValue = readTargetAttr(self.targetAttr),
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data = self.target || targetValue || '';
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/* Find which filter applies */
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var filter = filters[self.type]; /* check explicit type like {type: 'image'} */
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/* check explicit type like data-featherlight="image" */
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if(!filter && data in filters) {
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filter = filters[data];
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data = self.target && targetValue;
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}
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data = data || readTargetAttr('href') || '';
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/* check explicity type & content like {image: 'photo.jpg'} */
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if(!filter) {
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for(var filterName in filters) {
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if(self[filterName]) {
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filter = filters[filterName];
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data = self[filterName];
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}
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}
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}
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/* otherwise it's implicit, run checks */
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if(!filter) {
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var target = data;
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data = null;
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$.each(self.contentFilters, function() {
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filter = filters[this];
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if(filter.test) {
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data = filter.test(target);
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}
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if(!data && filter.regex && target.match && target.match(filter.regex)) {
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data = target;
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}
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return !data;
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});
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if(!data) {
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if('console' in window){ window.console.error('Featherlight: no content filter found ' + (target ? ' for "' + target + '"' : ' (no target specified)')); }
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return false;
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}
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}
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/* Process it */
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return filter.process.call(self, data);
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},
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/* sets the content of $instance to $content */
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setContent: function($content){
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var self = this;
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/* we need a special class for the iframe */
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if($content.is('iframe')) {
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self.$instance.addClass(self.namespace+'-iframe');
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}
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self.$instance.removeClass(self.namespace+'-loading');
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/* replace content by appending to existing one before it is removed
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this insures that featherlight-inner remain at the same relative
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position to any other items added to featherlight-content */
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self.$instance.find('.'+self.namespace+'-inner')
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.not($content) /* excluded new content, important if persisted */
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.slice(1).remove().end() /* In the unexpected event where there are many inner elements, remove all but the first one */
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.replaceWith($.contains(self.$instance[0], $content[0]) ? '' : $content);
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self.$content = $content.addClass(self.namespace+'-inner');
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return self;
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},
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/* opens the lightbox. "this" contains $instance with the lightbox, and with the config.
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Returns a promise that is resolved after is successfully opened. */
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open: function(event){
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var self = this;
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self.$instance.hide().appendTo(self.root);
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if((!event || !event.isDefaultPrevented())
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&& self.beforeOpen(event) !== false) {
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if(event){
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event.preventDefault();
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}
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var $content = self.getContent();
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if($content) {
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opened.push(self);
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toggleGlobalEvents(true);
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self.$instance.fadeIn(self.openSpeed);
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self.beforeContent(event);
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/* Set content and show */
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return $.when($content)
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.always(function($content){
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self.setContent($content);
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self.afterContent(event);
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})
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.then(self.$instance.promise())
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/* Call afterOpen after fadeIn is done */
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.done(function(){ self.afterOpen(event); });
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}
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}
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self.$instance.detach();
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return $.Deferred().reject().promise();
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},
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/* closes the lightbox. "this" contains $instance with the lightbox, and with the config
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returns a promise, resolved after the lightbox is successfully closed. */
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close: function(event){
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var self = this,
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deferred = $.Deferred();
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if(self.beforeClose(event) === false) {
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deferred.reject();
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} else {
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if (0 === pruneOpened(self).length) {
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toggleGlobalEvents(false);
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}
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self.$instance.fadeOut(self.closeSpeed,function(){
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self.$instance.detach();
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self.afterClose(event);
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deferred.resolve();
|
||
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});
|
||
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}
|
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return deferred.promise();
|
||
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},
|
||
|
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||
|
/* resizes the content so it fits in visible area and keeps the same aspect ratio.
|
||
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Does nothing if either the width or the height is not specified.
|
||
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Called automatically on window resize.
|
||
|
Override if you want different behavior. */
|
||
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resize: function(w, h) {
|
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if (w && h) {
|
||
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/* Reset apparent image size first so container grows */
|
||
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this.$content.css('width', '').css('height', '');
|
||
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/* Calculate the worst ratio so that dimensions fit */
|
||
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/* Note: -1 to avoid rounding errors */
|
||
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var ratio = Math.max(
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w / (this.$content.parent().width()-1),
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h / (this.$content.parent().height()-1));
|
||
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/* Resize content */
|
||
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if (ratio > 1) {
|
||
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ratio = h / Math.floor(h / ratio); /* Round ratio down so height calc works */
|
||
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this.$content.css('width', '' + w / ratio + 'px').css('height', '' + h / ratio + 'px');
|
||
|
}
|
||
|
}
|
||
|
},
|
||
|
|
||
|
/* Utility function to chain callbacks
|
||
|
[Warning: guru-level]
|
||
|
Used be extensions that want to let users specify callbacks but
|
||
|
also need themselves to use the callbacks.
|
||
|
The argument 'chain' has callback names as keys and function(super, event)
|
||
|
as values. That function is meant to call `super` at some point.
|
||
|
*/
|
||
|
chainCallbacks: function(chain) {
|
||
|
for (var name in chain) {
|
||
|
this[name] = $.proxy(chain[name], this, $.proxy(this[name], this));
|
||
|
}
|
||
|
}
|
||
|
};
|
||
|
|
||
|
$.extend(Featherlight, {
|
||
|
id: 0, /* Used to id single featherlight instances */
|
||
|
autoBind: '[data-featherlight]', /* Will automatically bind elements matching this selector. Clear or set before onReady */
|
||
|
defaults: Featherlight.prototype, /* You can access and override all defaults using $.featherlight.defaults, which is just a synonym for $.featherlight.prototype */
|
||
|
/* Contains the logic to determine content */
|
||
|
contentFilters: {
|
||
|
jquery: {
|
||
|
regex: /^[#.]\w/, /* Anything that starts with a class name or identifiers */
|
||
|
test: function(elem) { return elem instanceof $ && elem; },
|
||
|
process: function(elem) { return this.persist !== false ? $(elem) : $(elem).clone(true); }
|
||
|
},
|
||
|
image: {
|
||
|
regex: /\.(png|jpg|jpeg|gif|tiff|bmp|svg)(\?\S*)?$/i,
|
||
|
process: function(url) {
|
||
|
var self = this,
|
||
|
deferred = $.Deferred(),
|
||
|
img = new Image(),
|
||
|
$img = $('<img src="'+url+'" alt="" class="'+self.namespace+'-image" />');
|
||
|
img.onload = function() {
|
||
|
/* Store naturalWidth & height for IE8 */
|
||
|
$img.naturalWidth = img.width; $img.naturalHeight = img.height;
|
||
|
deferred.resolve( $img );
|
||
|
};
|
||
|
img.onerror = function() { deferred.reject($img); };
|
||
|
img.src = url;
|
||
|
return deferred.promise();
|
||
|
}
|
||
|
},
|
||
|
html: {
|
||
|
regex: /^\s*<[\w!][^<]*>/, /* Anything that starts with some kind of valid tag */
|
||
|
process: function(html) { return $(html); }
|
||
|
},
|
||
|
ajax: {
|
||
|
regex: /./, /* At this point, any content is assumed to be an URL */
|
||
|
process: function(url) {
|
||
|
var self = this,
|
||
|
deferred = $.Deferred();
|
||
|
/* we are using load so one can specify a target with: url.html #targetelement */
|
||
|
var $container = $('<div></div>').load(url, function(response, status){
|
||
|
if ( status !== "error" ) {
|
||
|
deferred.resolve($container.contents());
|
||
|
}
|
||
|
deferred.fail();
|
||
|
});
|
||
|
return deferred.promise();
|
||
|
}
|
||
|
},
|
||
|
iframe: {
|
||
|
process: function(url) {
|
||
|
var deferred = new $.Deferred();
|
||
|
var $content = $('<iframe/>');
|
||
|
var css = parseAttrs(this, 'iframe');
|
||
|
var attrs = slice(css, iFrameAttributeSet);
|
||
|
$content.hide()
|
||
|
.attr('src', url)
|
||
|
.attr(attrs)
|
||
|
.css(css)
|
||
|
.on('load', function() { deferred.resolve($content.show()); })
|
||
|
// We can't move an <iframe> and avoid reloading it,
|
||
|
// so let's put it in place ourselves right now:
|
||
|
.appendTo(this.$instance.find('.' + this.namespace + '-content'));
|
||
|
return deferred.promise();
|
||
|
}
|
||
|
},
|
||
|
text: {
|
||
|
process: function(text) { return $('<div>', {text: text}); }
|
||
|
}
|
||
|
},
|
||
|
|
||
|
functionAttributes: ['beforeOpen', 'afterOpen', 'beforeContent', 'afterContent', 'beforeClose', 'afterClose'],
|
||
|
|
||
|
/*** class methods ***/
|
||
|
/* read element's attributes starting with data-featherlight- */
|
||
|
readElementConfig: function(element, namespace) {
|
||
|
var Klass = this,
|
||
|
regexp = new RegExp('^data-' + namespace + '-(.*)'),
|
||
|
config = {};
|
||
|
if (element && element.attributes) {
|
||
|
$.each(element.attributes, function(){
|
||
|
var match = this.name.match(regexp);
|
||
|
if (match) {
|
||
|
var val = this.value,
|
||
|
name = $.camelCase(match[1]);
|
||
|
if ($.inArray(name, Klass.functionAttributes) >= 0) { /* jshint -W054 */
|
||
|
val = new Function(val); /* jshint +W054 */
|
||
|
} else {
|
||
|
try { val = JSON.parse(val); }
|
||
|
catch(e) {}
|
||
|
}
|
||
|
config[name] = val;
|
||
|
}
|
||
|
});
|
||
|
}
|
||
|
return config;
|
||
|
},
|
||
|
|
||
|
/* Used to create a Featherlight extension
|
||
|
[Warning: guru-level]
|
||
|
Creates the extension's prototype that in turn
|
||
|
inherits Featherlight's prototype.
|
||
|
Could be used to extend an extension too...
|
||
|
This is pretty high level wizardy, it comes pretty much straight
|
||
|
from CoffeeScript and won't teach you anything about Featherlight
|
||
|
as it's not really specific to this library.
|
||
|
My suggestion: move along and keep your sanity.
|
||
|
*/
|
||
|
extend: function(child, defaults) {
|
||
|
/* Setup class hierarchy, adapted from CoffeeScript */
|
||
|
var Ctor = function(){ this.constructor = child; };
|
||
|
Ctor.prototype = this.prototype;
|
||
|
child.prototype = new Ctor();
|
||
|
child.__super__ = this.prototype;
|
||
|
/* Copy class methods & attributes */
|
||
|
$.extend(child, this, defaults);
|
||
|
child.defaults = child.prototype;
|
||
|
return child;
|
||
|
},
|
||
|
|
||
|
attach: function($source, $content, config) {
|
||
|
var Klass = this;
|
||
|
if (typeof $content === 'object' && $content instanceof $ === false && !config) {
|
||
|
config = $content;
|
||
|
$content = undefined;
|
||
|
}
|
||
|
/* make a copy */
|
||
|
config = $.extend({}, config);
|
||
|
|
||
|
/* Only for openTrigger and namespace... */
|
||
|
var namespace = config.namespace || Klass.defaults.namespace,
|
||
|
tempConfig = $.extend({}, Klass.defaults, Klass.readElementConfig($source[0], namespace), config),
|
||
|
sharedPersist;
|
||
|
var handler = function(event) {
|
||
|
var $target = $(event.currentTarget);
|
||
|
/* ... since we might as well compute the config on the actual target */
|
||
|
var elemConfig = $.extend(
|
||
|
{$source: $source, $currentTarget: $target},
|
||
|
Klass.readElementConfig($source[0], tempConfig.namespace),
|
||
|
Klass.readElementConfig(event.currentTarget, tempConfig.namespace),
|
||
|
config);
|
||
|
var fl = sharedPersist || $target.data('featherlight-persisted') || new Klass($content, elemConfig);
|
||
|
if(fl.persist === 'shared') {
|
||
|
sharedPersist = fl;
|
||
|
} else if(fl.persist !== false) {
|
||
|
$target.data('featherlight-persisted', fl);
|
||
|
}
|
||
|
if (elemConfig.$currentTarget.blur) {
|
||
|
elemConfig.$currentTarget.blur(); // Otherwise 'enter' key might trigger the dialog again
|
||
|
}
|
||
|
fl.open(event);
|
||
|
};
|
||
|
|
||
|
$source.on(tempConfig.openTrigger+'.'+tempConfig.namespace, tempConfig.filter, handler);
|
||
|
|
||
|
return handler;
|
||
|
},
|
||
|
|
||
|
current: function() {
|
||
|
var all = this.opened();
|
||
|
return all[all.length - 1] || null;
|
||
|
},
|
||
|
|
||
|
opened: function() {
|
||
|
var klass = this;
|
||
|
pruneOpened();
|
||
|
return $.grep(opened, function(fl) { return fl instanceof klass; } );
|
||
|
},
|
||
|
|
||
|
close: function(event) {
|
||
|
var cur = this.current();
|
||
|
if(cur) { return cur.close(event); }
|
||
|
},
|
||
|
|
||
|
/* Does the auto binding on startup.
|
||
|
Meant only to be used by Featherlight and its extensions
|
||
|
*/
|
||
|
_onReady: function() {
|
||
|
var Klass = this;
|
||
|
if(Klass.autoBind){
|
||
|
/* Bind existing elements */
|
||
|
$(Klass.autoBind).each(function(){
|
||
|
Klass.attach($(this));
|
||
|
});
|
||
|
/* If a click propagates to the document level, then we have an item that was added later on */
|
||
|
$(document).on('click', Klass.autoBind, function(evt) {
|
||
|
if (evt.isDefaultPrevented()) {
|
||
|
return;
|
||
|
}
|
||
|
/* Bind featherlight */
|
||
|
var handler = Klass.attach($(evt.currentTarget));
|
||
|
/* Dispatch event directly */
|
||
|
handler(evt);
|
||
|
});
|
||
|
}
|
||
|
},
|
||
|
|
||
|
/* Featherlight uses the onKeyUp callback to intercept the escape key.
|
||
|
Private to Featherlight.
|
||
|
*/
|
||
|
_callbackChain: {
|
||
|
onKeyUp: function(_super, event){
|
||
|
if(27 === event.keyCode) {
|
||
|
if (this.closeOnEsc) {
|
||
|
$.featherlight.close(event);
|
||
|
}
|
||
|
return false;
|
||
|
} else {
|
||
|
return _super(event);
|
||
|
}
|
||
|
},
|
||
|
|
||
|
beforeOpen: function(_super, event) {
|
||
|
// Used to disable scrolling
|
||
|
$(document.documentElement).addClass('with-featherlight');
|
||
|
|
||
|
// Remember focus:
|
||
|
this._previouslyActive = document.activeElement;
|
||
|
|
||
|
// Disable tabbing:
|
||
|
// See http://stackoverflow.com/questions/1599660/which-html-elements-can-receive-focus
|
||
|
this._$previouslyTabbable = $("a, input, select, textarea, iframe, button, iframe, [contentEditable=true]")
|
||
|
.not('[tabindex]')
|
||
|
.not(this.$instance.find('button'));
|
||
|
|
||
|
this._$previouslyWithTabIndex = $('[tabindex]').not('[tabindex="-1"]');
|
||
|
this._previousWithTabIndices = this._$previouslyWithTabIndex.map(function(_i, elem) {
|
||
|
return $(elem).attr('tabindex');
|
||
|
});
|
||
|
|
||
|
this._$previouslyWithTabIndex.add(this._$previouslyTabbable).attr('tabindex', -1);
|
||
|
|
||
|
if (document.activeElement.blur) {
|
||
|
document.activeElement.blur();
|
||
|
}
|
||
|
return _super(event);
|
||
|
},
|
||
|
|
||
|
afterClose: function(_super, event) {
|
||
|
var r = _super(event);
|
||
|
// Restore focus
|
||
|
var self = this;
|
||
|
this._$previouslyTabbable.removeAttr('tabindex');
|
||
|
this._$previouslyWithTabIndex.each(function(i, elem) {
|
||
|
$(elem).attr('tabindex', self._previousWithTabIndices[i]);
|
||
|
});
|
||
|
this._previouslyActive.focus();
|
||
|
// Restore scroll
|
||
|
if(Featherlight.opened().length === 0) {
|
||
|
$(document.documentElement).removeClass('with-featherlight');
|
||
|
}
|
||
|
return r;
|
||
|
},
|
||
|
|
||
|
onResize: function(_super, event){
|
||
|
this.resize(this.$content.naturalWidth, this.$content.naturalHeight);
|
||
|
return _super(event);
|
||
|
},
|
||
|
|
||
|
afterContent: function(_super, event){
|
||
|
var r = _super(event);
|
||
|
this.$instance.find('[autofocus]:not([disabled])').focus();
|
||
|
this.onResize(event);
|
||
|
return r;
|
||
|
}
|
||
|
}
|
||
|
});
|
||
|
|
||
|
$.featherlight = Featherlight;
|
||
|
|
||
|
/* bind jQuery elements to trigger featherlight */
|
||
|
$.fn.featherlight = function($content, config) {
|
||
|
Featherlight.attach(this, $content, config);
|
||
|
return this;
|
||
|
};
|
||
|
|
||
|
/* bind featherlight on ready if config autoBind is set */
|
||
|
$(document).ready(function(){ Featherlight._onReady(); });
|
||
|
}(jQuery));
|