mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/MultimediaViewer
synced 2024-11-28 01:50:09 +00:00
599 lines
17 KiB
JavaScript
599 lines
17 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 () {
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var MMVB;
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/**
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* Bootstrap code listening to thumb clicks checking the initial location.hash
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* Loads the mmv and opens it if necessary
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*
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* @class mw.mmv.MultimediaViewerBootstrap
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*/
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function MultimediaViewerBootstrap() {
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// Exposed for tests
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this.hoverWaitDuration = 200;
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// TODO lazy-load config and htmlUtils
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/** @property {mw.mmv.Config} config - */
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this.config = new mw.mmv.Config(
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mw.config.get( 'wgMultimediaViewer', {} ),
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mw.config,
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mw.user,
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new mw.Api(),
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mw.storage
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);
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this.validExtensions = this.config.extensions();
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/** @property {mw.mmv.HtmlUtils} htmlUtils - */
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this.htmlUtils = new mw.mmv.HtmlUtils();
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/**
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* This flag is set to true when we were unable to load the viewer.
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* @property {boolean}
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*/
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this.viewerIsBroken = false;
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this.thumbsReadyDeferred = $.Deferred();
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this.thumbs = [];
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this.$thumbs = null; // will be set by processThumbs
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// find and setup all thumbs on this page
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// this will run initially and then every time the content changes,
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// e.g. via a VE edit or pagination in a multipage file
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mw.hook( 'wikipage.content' ).add( $.proxy( this, 'processThumbs' ) );
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}
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MMVB = MultimediaViewerBootstrap.prototype;
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/**
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* Loads the mmv module asynchronously and passes the thumb data to it
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*
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* @param {boolean} [setupOverlay]
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* @return {jQuery.Promise}
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*/
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MMVB.loadViewer = function ( setupOverlay ) {
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var deferred = $.Deferred(),
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bs = this,
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viewer,
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message;
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// Don't load if someone has specifically stopped us from doing so
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if ( mw.config.get( 'wgMediaViewer' ) !== true ) {
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return deferred.reject();
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}
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// FIXME setupOverlay is a quick hack to avoid setting up and immediately
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// removing the overlay on a not-MMV -> not-MMV hash change.
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// loadViewer is called on every click and hash change and setting up
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// the overlay is not needed on all of those; this logic really should
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// not be here.
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if ( setupOverlay ) {
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bs.setupOverlay();
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}
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mw.loader.using( 'mmv', function () {
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try {
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viewer = bs.getViewer();
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} catch ( e ) {
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message = e.message;
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if ( e.stack ) {
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message += '\n' + e.stack;
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}
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deferred.reject( message );
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return;
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}
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deferred.resolve( viewer );
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}, function ( error ) {
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deferred.reject( error.message );
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} );
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return deferred.promise()
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.then(
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function ( viewer ) {
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if ( !bs.viewerInitialized ) {
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if ( bs.thumbs.length ) {
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viewer.initWithThumbs( bs.thumbs );
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}
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bs.viewerInitialized = true;
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}
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return viewer;
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},
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function ( message ) {
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mw.log.warn( message );
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bs.cleanupOverlay();
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bs.viewerIsBroken = true;
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mw.notify( 'Error loading MediaViewer: ' + message );
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return $.Deferred().reject( message );
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}
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);
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};
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/**
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* Processes all thumbs found on the page
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*
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* @param {jQuery} $content Element to search for thumbs
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*/
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MMVB.processThumbs = function ( $content ) {
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var bs = this;
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this.$thumbs = $content.find(
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'.gallery .image img, ' +
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'a.image img, ' +
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'#file a img, ' +
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'figure[typeof*="mw:Image"] > *:first-child > img, ' +
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'span[typeof*="mw:Image"] img'
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);
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try {
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this.$thumbs.each( function ( i, thumb ) {
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bs.processThumb( thumb );
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} );
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} finally {
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this.thumbsReadyDeferred.resolve();
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// now that we have set up our real click handler we can we can remove the temporary
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// handler added in mmv.head.js which just replays clicks to the real handler
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$( document ).off( 'click.mmv-head' );
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}
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};
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/**
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* Check if this thumbnail should be handled by MediaViewer
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*
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* @param {jQuery} $thumb the thumbnail (an `<img>` element) in question
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* @return {boolean}
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*/
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MMVB.isAllowedThumb = function ( $thumb ) {
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var selectors = [
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'.metadata', // this is inside an informational template like {{refimprove}} on enwiki.
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'.noviewer', // MediaViewer has been specifically disabled for this image
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'.noarticletext', // we are on an error page for a non-existing article, the image is part of some template
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'#siteNotice',
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'ul.mw-gallery-slideshow li.gallerybox' // thumbnails of a slideshow gallery
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];
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return $thumb.closest( selectors.join( ', ' ) ).length === 0;
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};
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/**
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* Processes a thumb
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*
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* @param {Object} thumb
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*/
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MMVB.processThumb = function ( thumb ) {
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var title,
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bs = this,
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$thumb = $( thumb ),
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$link = $thumb.closest( 'a.image, [typeof*="mw:Image"] > a' ),
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$thumbContain = $link.closest( '.thumb, [typeof*="mw:Image"]' ),
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$enlarge = $thumbContain.find( '.magnify a' ),
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link = $link.prop( 'href' ),
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alt = $thumb.attr( 'alt' ),
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isFilePageMainThumb = $thumb.closest( '#file' ).length > 0;
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if ( isFilePageMainThumb ) {
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// main thumbnail (file preview area) of a file page
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// if this is a PDF filetype thumbnail, it can trick us,
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// so we short-circuit that logic and use the file page title
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// instead of the thumbnail logic.
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title = mw.Title.newFromText( mw.config.get( 'wgTitle' ), mw.config.get( 'wgNamespaceNumber' ) );
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} else {
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title = mw.Title.newFromImg( $thumb );
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}
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if ( !title || !title.getExtension() || !( title.getExtension().toLowerCase() in bs.validExtensions ) ) {
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// Short-circuit event handler and interface setup, because
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// we can't do anything for this filetype
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return;
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}
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if ( !bs.isAllowedThumb( $thumb ) ) {
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return;
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}
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if ( $thumbContain.length ) {
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// If this is a thumb, we preload JS/CSS when the mouse cursor hovers the thumb container (thumb image + caption + border)
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$thumbContain.on( {
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mouseenter: function () {
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// There is no point preloading if clicking the thumb won't open Media Viewer
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if ( !bs.config.isMediaViewerEnabledOnClick() ) {
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return;
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}
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bs.preloadOnHoverTimer = setTimeout( function () {
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mw.loader.load( 'mmv' );
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}, bs.hoverWaitDuration );
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},
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mouseleave: function () {
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if ( bs.preloadOnHoverTimer ) {
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clearTimeout( bs.preloadOnHoverTimer );
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}
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}
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} );
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}
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if ( isFilePageMainThumb ) {
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this.processFilePageThumb( $thumb, title );
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return;
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}
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// This is the data that will be passed onto the mmv
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this.thumbs.push( {
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thumb: thumb,
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$thumb: $thumb,
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title: title,
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link: link,
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alt: alt,
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caption: this.findCaption( $thumbContain, $link ) } );
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$link.add( $enlarge ).on( 'click', function ( e ) {
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return bs.click( this, e, title );
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} );
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};
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/**
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* Processes the main thumbnail of a file page by adding some buttons
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* below to open MediaViewer.
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*
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* @param {jQuery} $thumb
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* @param {mw.Title} title
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*/
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MMVB.processFilePageThumb = function ( $thumb, title ) {
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var $link,
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$configLink,
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$filepageButtons,
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bs = this,
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link = $thumb.closest( 'a' ).prop( 'href' );
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// remove the buttons (and the clearing element) if they are already there
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// this should not happen (at least until we support paged media) but just in case
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// eslint-disable-next-line no-jquery/no-global-selector
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$( '.mw-mmv-filepage-buttons' ).next().addBack().remove();
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$link = $( '<a>' )
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// It won't matter because we catch the click event anyway, but
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// give the user some URL to see.
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.prop( 'href', link )
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.addClass( 'mw-mmv-view-expanded mw-ui-button mw-ui-icon mw-ui-icon-before' )
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.text( mw.message( 'multimediaviewer-view-expanded' ).text() );
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$configLink = $( '<a>' )
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.prop( 'href', $thumb.closest( 'a' ).prop( 'href' ) )
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.addClass( 'mw-mmv-view-config mw-ui-button mw-ui-icon mw-ui-icon-element' )
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.text( mw.message( 'multimediaviewer-view-config' ).text() );
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$filepageButtons = $( '<div>' )
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.addClass( 'mw-ui-button-group mw-mmv-filepage-buttons' )
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.append( $link, $configLink );
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// eslint-disable-next-line no-jquery/no-global-selector
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$( '.fullMedia' ).append(
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$filepageButtons,
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$( '<div>' )
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.css( 'clear', 'both' )
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);
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this.thumbs.push( {
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thumb: $thumb.get( 0 ),
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$thumb: $thumb,
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title: title,
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link: link
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} );
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$link.on( 'click', function () {
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if ( bs.statusInfoDialog ) {
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bs.statusInfoDialog.close();
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}
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bs.openImage( this, title );
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return false;
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} );
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$configLink.on( 'click', function () {
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if ( bs.statusInfoDialog ) {
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bs.statusInfoDialog.close();
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}
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bs.openImage( this, title ).then( function () {
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$( document ).trigger( 'mmv-options-open' );
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} );
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return false;
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} );
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if ( this.config.shouldShowStatusInfo() ) {
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this.config.disableStatusInfo();
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this.showStatusInfo();
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}
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};
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/**
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* Shows a popup notifying the user
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*/
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MMVB.showStatusInfo = function () {
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var bs = this;
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mw.loader.using( 'mmv.ui.tipsyDialog' ).done( function () {
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/** @property {mw.mmv.ui.TipsyDialog} statusInfoDialog popup on the file page explaining how to re-enable */
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// eslint-disable-next-line no-jquery/no-global-selector
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bs.statusInfoDialog = new mw.mmv.ui.TipsyDialog( $( '.mw-mmv-view-expanded' ), { gravity: 'sw' } );
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bs.statusInfoDialog.setContent(
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mw.message( 'multimediaviewer-disable-info-title' ).plain(),
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mw.message( 'multimediaviewer-disable-info' ).escaped()
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);
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// tipsy mispositions the tooltip, probably because it does the positioning before the buttons are
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// displayed and the page is reflown. Adding some delay seems to help.
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setTimeout( function () {
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bs.statusInfoDialog.open();
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}, 1000 );
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} );
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};
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/**
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* Finds the caption for an image.
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*
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* @param {jQuery} $thumbContain The container for the thumbnail.
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* @param {jQuery} $link The link that encompasses the thumbnail.
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* @return {string|undefined} Unsafe HTML may be present - caution
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*/
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MMVB.findCaption = function ( $thumbContain, $link ) {
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var $thumbCaption, $potentialCaptions;
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if ( !$thumbContain.length ) {
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return $link.prop( 'title' ) || undefined;
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}
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$potentialCaptions = $thumbContain.find( '.thumbcaption, figcaption' );
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if ( $potentialCaptions.length < 2 ) {
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$thumbCaption = $potentialCaptions.eq( 0 );
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} else {
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// Template:Multiple_image or some such; try to find closest caption to the image
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// eslint-disable-next-line no-jquery/no-sizzle
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$thumbCaption = $link.closest( ':has(> .thumbcaption)', $thumbContain )
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.find( '> .thumbcaption' );
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}
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if ( !$thumbCaption.length ) { // gallery, maybe
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$thumbCaption = $thumbContain
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.closest( '.gallerybox' )
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.not( function () {
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// do not treat categories as galleries - the autogenerated caption they have is not helpful
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return $thumbContain.closest( '#mw-category-media' ).length;
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} )
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.not( function () {
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// do not treat special file related pages as galleries
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var $specialFileRelatedPages = $(
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'.page-Special_NewFiles, ' +
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'.page-Special_MostLinkedFiles,' +
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'.page-Special_MostGloballyLinkedFiles, ' +
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'.page-Special_UncategorizedFiles, ' +
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'.page-Special_UnusedFiles'
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);
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return $thumbContain.closest( $specialFileRelatedPages ).length;
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} )
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.find( '.gallerytext' );
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}
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if ( $thumbCaption.find( '.magnify' ).length ) {
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$thumbCaption = $thumbCaption.clone();
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$thumbCaption.find( '.magnify' ).remove();
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}
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return this.htmlUtils.htmlToTextWithTags( $thumbCaption.html() || '' );
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};
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/**
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* Opens MediaViewer and loads the given thumbnail. Requires processThumb() to be called first.
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*
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* @param {HTMLElement} element Clicked element
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* @param {mw.Title} title File title
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* @return {jQuery.Promise}
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*/
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MMVB.openImage = function ( element, title ) {
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var $element = $( element );
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mw.mmv.durationLogger.start( [ 'click-to-first-image', 'click-to-first-metadata' ] );
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if ( $element.is( 'a.image, [typeof*="mw:Image"] > a' ) ) {
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mw.mmv.actionLogger.log( 'thumbnail' );
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} else if ( $element.is( '.magnify a' ) ) {
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mw.mmv.actionLogger.log( 'enlarge' );
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}
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this.ensureEventHandlersAreSetUp();
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return this.loadViewer( true ).then( function ( viewer ) {
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viewer.loadImageByTitle( title, false );
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} );
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};
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/**
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* Handles a click event on a link
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*
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* @param {HTMLElement} element Clicked element
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* @param {jQuery.Event} e jQuery event object
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* @param {mw.Title} title File title
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* @return {boolean} a value suitable for an event handler (ie. true if the click should be handled
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* by the browser).
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*/
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MMVB.click = function ( element, e, title ) {
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// Do not interfere with non-left clicks or if modifier keys are pressed.
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if ( ( e.button !== 0 && e.which !== 1 ) || e.altKey || e.ctrlKey || e.shiftKey || e.metaKey ) {
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return true;
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}
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// Don't load if someone has specifically stopped us from doing so
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if ( !this.config.isMediaViewerEnabledOnClick() ) {
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return true;
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}
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// Don't load if we already tried loading and it failed
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if ( this.viewerIsBroken ) {
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return true;
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}
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this.openImage( element, title );
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// calling this late so that in case of errors users at least get to the file page
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e.preventDefault();
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return false;
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};
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/**
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* Returns true if the hash part of the current URL is one that's owned by MMV.
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*
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* @return {boolean}
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* @private
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*/
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MMVB.isViewerHash = function () {
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var path = OO.Router.prototype.getPath();
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return path.match( mw.mmv.ROUTE_REGEXP ) || path.match( mw.mmv.LEGACY_ROUTE_REGEXP );
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};
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/**
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* Handles the browser location hash on pageload or hash change
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*
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* @param {boolean} initialHash Whether this is called for the hash that came with the pageload
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*/
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MMVB.hash = function ( initialHash ) {
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var bootstrap = this;
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// There is no point loading the mmv if it isn't loaded yet for hash changes unrelated to the mmv
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// Such as anchor links on the page
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if ( !this.viewerInitialized && !this.isViewerHash() ) {
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return;
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}
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this.loadViewer( this.isViewerHash() ).then( function ( viewer ) {
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viewer.router.checkRoute();
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// this is an ugly temporary fix to avoid a black screen of death when
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// the page is loaded with an invalid MMV url
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if ( !viewer.isOpen ) {
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bootstrap.cleanupOverlay();
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} else if ( initialHash ) {
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mw.mmv.actionLogger.log( 'hash-load' );
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} else {
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mw.mmv.actionLogger.log( 'history-navigation' );
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}
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} );
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};
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/**
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* Instantiates a new viewer if necessary
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*
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* @return {mw.mmv.MultimediaViewer}
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*/
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MMVB.getViewer = function () {
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if ( this.viewer === undefined ) {
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this.viewer = new mw.mmv.MultimediaViewer( this.config );
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this.viewer.setupEventHandlers();
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mw.mmv.viewer = this.viewer;
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}
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return this.viewer;
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};
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/**
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* Listens to events on the window/document
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*/
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MMVB.setupEventHandlers = function () {
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var self = this;
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/** @property {boolean} eventHandlersHaveBeenSetUp tracks domready event handler state */
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this.eventHandlersHaveBeenSetUp = true;
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// Interpret any hash that might already be in the url
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self.hash( true );
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$( document ).on( 'mmv-setup-overlay', function () {
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self.setupOverlay();
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} ).on( 'mmv-cleanup-overlay', function () {
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self.cleanupOverlay();
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} );
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};
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/**
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* Cleans up event handlers, used for tests
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*/
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MMVB.cleanupEventHandlers = function () {
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$( document ).off( 'mmv-setup-overlay mmv-cleanup-overlay' );
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this.eventHandlersHaveBeenSetUp = false;
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};
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/**
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* Makes sure event handlers are set up properly via MultimediaViewerBootstrap.setupEventHandlers().
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* Called before loading the main mmv module. At this point, event handers for MultimediaViewerBootstrap
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* should have been set up, but due to bug 70756 it cannot be guaranteed.
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*/
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MMVB.ensureEventHandlersAreSetUp = function () {
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if ( !this.eventHandlersHaveBeenSetUp ) {
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this.setupEventHandlers();
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}
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};
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/**
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* Sets up the overlay while the viewer loads
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*/
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MMVB.setupOverlay = function () {
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var $body = $( document.body );
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// There are situations where we can call setupOverlay while the overlay is already there,
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// such as inside this.hash(). In that case, do nothing
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if ( $body.hasClass( 'mw-mmv-lightbox-open' ) ) {
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return;
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}
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if ( !this.$overlay ) {
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this.$overlay = $( '<div>' )
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.addClass( 'mw-mmv-overlay' );
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}
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this.savedScrollTop = $( window ).scrollTop();
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$body.addClass( 'mw-mmv-lightbox-open' )
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.append( this.$overlay );
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};
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/**
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* Cleans up the overlay
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*/
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MMVB.cleanupOverlay = function () {
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var bootstrap = this;
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$( document.body ).removeClass( 'mw-mmv-lightbox-open' );
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if ( this.$overlay ) {
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this.$overlay.remove();
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}
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if ( this.savedScrollTop !== undefined ) {
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// setTimeout because otherwise Chrome will scroll back to top after the popstate event handlers run
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setTimeout( function () {
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$( window ).scrollTop( bootstrap.savedScrollTop );
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bootstrap.savedScrollTop = undefined;
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} );
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}
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};
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MMVB.whenThumbsReady = function () {
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return this.thumbsReadyDeferred.promise();
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};
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mw.mmv.MultimediaViewerBootstrap = MultimediaViewerBootstrap;
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}() );
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