mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/MultimediaViewer
synced 2024-11-17 12:53:24 +00:00
114 lines
3 KiB
JavaScript
114 lines
3 KiB
JavaScript
/*
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* This file is part of the MediaWiki extension MultimediaViewer.
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*
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* MultimediaViewer is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* MultimediaViewer is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with MultimediaViewer. If not, see <http://www.gnu.org/licenses/>.
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*/
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( function ( mw, $ ) {
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/**
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* @class mw.mmv.ui.Element
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* @abstract
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* Represents a UI element.
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* @constructor
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* @param {jQuery} $container
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*/
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function Element( $container ) {
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/** @property {jQuery} $container The element that contains the UI element. */
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this.$container = $container;
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/** @property {Object.<string, string[]>} eventsRegistered Events that this element has registered with the DOM. */
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this.eventsRegistered = {};
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}
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/**
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* @method
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* Helper function for whitelisting HTML to only keep links and text. Works in-place.
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* @param {jQuery} $el
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*/
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Element.prototype.whitelistHtml = function ( $el ) {
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var child, $prev, $child = $el.children().first();
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while ( $child && $child.length ) {
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child = $child.get( 0 );
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if ( child.nodeType !== child.ELEMENT_NODE ) {
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return;
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}
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this.whitelistHtml( $child );
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if ( !$child.is( 'a' ) ) {
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$prev = $child.prev();
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$child.replaceWith( $child.contents() );
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} else {
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$prev = $child;
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}
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if ( $prev && $prev.length === 1 ) {
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$child = $prev.next();
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} else {
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$child = $el.children().first();
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}
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}
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};
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/**
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* @method
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* @abstract
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* Sets the data for the element.
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*/
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Element.prototype.set = function () {};
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/**
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* @method
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* @abstract
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* Empties the element.
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*/
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Element.prototype.empty = function () {};
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/**
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* @method
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* Add event handler in a way that will be auto-cleared on lightbox close
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* @param {string} name Name of event, like 'keydown'
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* @param {Function} handler Callback for the event
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*/
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Element.prototype.handleEvent = function ( name, handler ) {
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if ( this.eventsRegistered[name] === undefined ) {
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this.eventsRegistered[name] = [];
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}
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this.eventsRegistered[name].push( handler );
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$( document ).on( name, handler );
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};
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/**
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* @method
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* Remove all events that have been registered on this element.
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*/
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Element.prototype.clearEvents = function () {
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var i, handlers, thisevent,
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events = Object.keys( this.eventsRegistered );
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for ( i = 0; i < events.length; i++ ) {
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thisevent = events[i];
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handlers = this.eventsRegistered[thisevent];
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while ( handlers.length > 0 ) {
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$( document ).off( thisevent, handlers.pop() );
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}
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}
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};
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mw.mmv.ui = {};
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mw.mmv.ui.Element = Element;
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}( mediaWiki, jQuery ) );
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