mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/MultimediaViewer
synced 2024-09-29 13:17:35 +00:00
6a0ad63085
* create a resize-end event which fires 100ms after resize ends (or pauses) * move slow resize callback (fetching new thumbnail from the server) to resize-end Change-Id: I1c1217ea43ffade4cfaf0c03f24574d0ebfee080 Mingle: https://wikimedia.mingle.thoughtworks.com/projects/multimedia/cards/898
904 lines
28 KiB
JavaScript
904 lines
28 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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var MMVP,
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comingFromHashChange = false;
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/**
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* Analyses the page, looks for image content and sets up the hooks
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* to manage the viewing experience of such content.
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* @class mw.mmv.MultimediaViewer
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* @constructor
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*/
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function MultimediaViewer() {
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var apiCacheMaxAge = 86400; // one day
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/**
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* @property {mw.mmv.provider.Image}
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* @private
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*/
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this.imageProvider = new mw.mmv.provider.Image();
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/**
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* @property {mw.mmv.provider.ImageInfo}
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* @private
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*/
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this.imageInfoProvider = new mw.mmv.provider.ImageInfo( new mw.mmv.logging.Api( 'imageinfo' ),
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// Short-circuit, don't fallback, to save some tiny amount of time
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{ language: mw.config.get( 'wgUserLanguage', false ) || mw.config.get( 'wgContentLanguage', 'en' ) }
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);
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/**
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* @property {mw.mmv.provider.FileRepoInfo}
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* @private
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*/
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this.fileRepoInfoProvider = new mw.mmv.provider.FileRepoInfo( new mw.mmv.logging.Api( 'filerepoinfo' ),
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{ maxage: apiCacheMaxAge } );
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/**
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* @property {mw.mmv.provider.ThumbnailInfo}
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* @private
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*/
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this.thumbnailInfoProvider = new mw.mmv.provider.ThumbnailInfo( new mw.mmv.logging.Api( 'thumbnailinfo' ),
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{ maxage: apiCacheMaxAge } );
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/**
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* @property {mw.mmv.provider.ThumbnailInfo}
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* @private
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*/
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this.guessedThumbnailInfoProvider = new mw.mmv.provider.GuessedThumbnailInfo();
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/**
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* @property {mw.mmv.provider.UserInfo}
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* @private
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*/
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this.userInfoProvider = new mw.mmv.provider.UserInfo( new mw.mmv.logging.Api( 'userinfo' ), {
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useApi: this.needGender(),
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maxage: apiCacheMaxAge
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} );
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/**
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* Image index on page.
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* @property {number}
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*/
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this.currentIndex = 0;
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/**
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* @property {mw.mmv.routing.Router} router -
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*/
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this.router = new mw.mmv.routing.Router();
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/**
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* UI object used to display the pictures in the page.
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* @property {mw.mmv.LightboxInterface}
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* @private
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*/
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this.ui = new mw.mmv.LightboxInterface();
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/**
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* How many sharp images have been displayed in Media Viewer since the pageload
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* @property {number}
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*/
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this.imageDisplayedCount = 0;
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/**
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* How many data-filled metadata panels have been displayed in Media Viewer since the pageload
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* @property {number}
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*/
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this.metadataDisplayedCount = 0;
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/** @property {string} documentTitle base document title, MediaViewer will expand this */
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this.documentTitle = document.title;
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}
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MMVP = MultimediaViewer.prototype;
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/**
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* Check if we need to fetch gender information. This relies on the fact that
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* multimediaviewer-userpage-link is the only message which takes a gender parameter.
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* @return {boolean}
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* FIXME there has to be a better way than this
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*/
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MMVP.needGender = function () {
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var male, female, unknown;
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male = mw.message( 'multimediaviewer-userpage-link', '_', 'male' ).text();
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female = mw.message( 'multimediaviewer-userpage-link', '_', 'female' ).text();
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unknown = mw.message( 'multimediaviewer-userpage-link', '_', 'unknown' ).text();
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return male !== female || male !== unknown || female !== unknown;
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};
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/**
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* Initialize the lightbox interface given an array of thumbnail
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* objects.
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* @param {Object[]} thumbs Complex structure...TODO, document this better.
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*/
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MMVP.initWithThumbs = function ( thumbs ) {
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var i, thumb;
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this.thumbs = thumbs;
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for ( i = 0; i < this.thumbs.length; i++ ) {
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thumb = this.thumbs[ i ];
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// Create a LightboxImage object for each legit image
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thumb.image = this.createNewImage(
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thumb.$thumb.prop( 'src' ),
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thumb.link,
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thumb.title,
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i,
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thumb.thumb,
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thumb.caption
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);
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}
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};
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/**
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* Create an image object for the lightbox to use.
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* @protected
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* @param {string} fileLink Link to the file - generally a thumb URL
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* @param {string} filePageLink Link to the File: page
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* @param {mw.Title} fileTitle Represents the File: page
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* @param {number} index Which number file this is
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* @param {HTMLImageElement} thumb The thumbnail that represents this image on the page
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* @param {string} [caption] The caption, if any.
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* @returns {mw.mmv.LightboxImage}
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*/
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MMVP.createNewImage = function ( fileLink, filePageLink, fileTitle, index, thumb, caption ) {
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var thisImage = new mw.mmv.LightboxImage( fileLink, filePageLink, fileTitle, index, thumb, caption ),
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$thumb = $( thumb );
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thisImage.filePageLink = filePageLink;
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thisImage.filePageTitle = fileTitle;
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thisImage.index = index;
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thisImage.thumbnail = thumb;
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thisImage.originalWidth = parseInt( $thumb.data( 'file-width' ), 10 );
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thisImage.originalHeight = parseInt( $thumb.data( 'file-height' ), 10 );
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return thisImage;
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};
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/**
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* Handles resize events in viewer.
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* @protected
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* @param {mw.mmv.LightboxInterface} ui lightbox that got resized
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*/
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MMVP.resize = function ( ui ) {
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var viewer = this,
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image = this.thumbs[ this.currentIndex ].image,
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imageWidths;
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this.preloadThumbnails();
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if ( image ) {
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imageWidths = ui.canvas.getCurrentImageWidths();
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this.fetchThumbnailForLightboxImage(
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image, imageWidths.real
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).then( function( thumbnail, image ) {
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viewer.setImage( ui, thumbnail, image, imageWidths );
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}, function ( error ) {
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viewer.ui.canvas.showError( error );
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} );
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}
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this.updateControls();
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};
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/**
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* Updates positioning of controls, usually after a resize event.
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*/
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MMVP.updateControls = function () {
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var numImages = this.thumbs ? this.thumbs.length : 0,
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showNextButton = this.currentIndex < (numImages - 1),
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showPreviousButton = this.currentIndex > 0;
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this.ui.updateControls( showNextButton, showPreviousButton );
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};
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/**
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* Loads and sets the specified image. It also updates the controls.
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* @param {mw.mmv.LightboxInterface} ui image container
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* @param {mw.mmv.model.Thumbnail} thumbnail thumbnail information
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* @param {HTMLImageElement} imageElement
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* @param {mw.mmv.model.ThumbnailWidth} imageWidths
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*/
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MMVP.setImage = function ( ui, thumbnail, imageElement, imageWidths ) {
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ui.canvas.setImageAndMaxDimensions( thumbnail, imageElement, imageWidths );
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this.updateControls();
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};
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/**
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* Loads a specified image.
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* @param {mw.mmv.LightboxImage} image
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* @param {HTMLImageElement} initialImage A thumbnail to use as placeholder while the image loads
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*/
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MMVP.loadImage = function ( image, initialImage ) {
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var imageWidths,
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imagePromise,
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metadataPromise,
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start,
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viewer = this,
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$initialImage = $( initialImage );
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this.currentIndex = image.index;
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this.currentImageFileTitle = image.filePageTitle;
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if ( !this.isOpen ) {
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this.ui.open();
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this.isOpen = true;
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} else {
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this.ui.empty();
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}
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this.setHash();
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// At this point we can't show the thumbnail because we don't
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// know what size it should be. We still assign it to allow for
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// size calculations in getCurrentImageWidths, which needs to know
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// the aspect ratio
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$initialImage.hide();
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this.ui.canvas.set( image, $initialImage );
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this.preloadImagesMetadata();
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this.preloadThumbnails();
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// this.preloadFullscreenThumbnail( image ); // disabled - #474
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imageWidths = this.ui.canvas.getCurrentImageWidths();
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start = $.now();
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imagePromise = this.fetchThumbnailForLightboxImage( image, imageWidths.real );
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this.resetBlurredThumbnailStates();
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if ( imagePromise.state() === 'pending' ) {
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this.displayPlaceholderThumbnail( image, $initialImage, imageWidths );
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}
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this.setupProgressBar( image, imagePromise, imageWidths.real );
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imagePromise.done( function ( thumbnail, imageElement ) {
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if ( viewer.currentIndex !== image.index ) {
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return;
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}
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if ( viewer.imageDisplayedCount++ === 0 ) {
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mw.mmv.durationLogger.stop( 'click-to-first-image' );
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}
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viewer.displayRealThumbnail( thumbnail, imageElement, imageWidths, $.now() - start );
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} ).fail( function ( error ) {
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viewer.ui.canvas.showError( error );
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} );
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metadataPromise = this.fetchSizeIndependentLightboxInfo(
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image.filePageTitle
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).done( function ( imageInfo, repoInfo, userInfo ) {
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if ( viewer.currentIndex !== image.index ) {
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return;
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}
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if ( viewer.metadataDisplayedCount++ === 0 ) {
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mw.mmv.durationLogger.stop( 'click-to-first-metadata' );
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}
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viewer.ui.panel.setImageInfo( image, imageInfo, repoInfo, userInfo );
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// File reuse steals a bunch of information from the DOM, so do it last
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viewer.ui.setFileReuseData( imageInfo, repoInfo, image.caption );
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} ).fail( function ( error ) {
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if ( viewer.currentIndex !== image.index ) {
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return;
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}
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viewer.ui.panel.showError( error );
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} );
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$.when( imagePromise, metadataPromise ).then( function() {
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if ( viewer.currentIndex !== image.index ) {
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return;
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}
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viewer.ui.panel.scroller.animateMetadataOnce();
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viewer.preloadDependencies();
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} );
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this.comingFromHashChange = false;
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};
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/**
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* Loads an image by its title
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* @param {mw.Title} title
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* @param {boolean} updateHash Viewer should update the location hash when true
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*/
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MMVP.loadImageByTitle = function ( title, updateHash ) {
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var viewer = this;
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if ( !this.thumbs || !this.thumbs.length ) {
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return;
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}
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this.comingFromHashChange = !updateHash;
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$.each( this.thumbs, function ( idx, thumb ) {
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if ( thumb.title.getPrefixedText() === title.getPrefixedText() ) {
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viewer.loadImage( thumb.image, thumb.$thumb.clone()[ 0 ], true );
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return false;
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}
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} );
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};
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/**
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* @private
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* Image loading progress. Keyed by image (database) name + '|' + thumbnail width in pixels,
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* value is undefined, 'blurred' or 'real' (meaning respectively that no thumbnail is shown
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* yet / the thumbnail that existed on the page is shown, enlarged and blurred / the real,
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* correct-size thumbnail is shown).
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* @property {Object.<string, string>}
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*/
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MMVP.thumbnailStateCache = {};
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/**
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* Resets the cross-request states needed to handle the blurred thumbnail logic.
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*/
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MMVP.resetBlurredThumbnailStates = function () {
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/**
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* Stores whether the real image was loaded and displayed already.
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* This is reset when paging, so it is not necessarily accurate.
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* @property {boolean}
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*/
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this.realThumbnailShown = false;
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/**
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* Stores whether the a blurred placeholder is being displayed in place of the real image.
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* When a placeholder is displayed, but it is not blurred, this is false.
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* This is reset when paging, so it is not necessarily accurate.
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* @property {boolean}
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*/
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this.blurredThumbnailShown = false;
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};
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/**
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* Display the real, full-resolution, thumbnail that was fetched with fetchThumbnail
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* @param {mw.mmv.model.Thumbnail} thumbnail
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* @param {HTMLImageElement} imageElement
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* @param {mw.mmv.model.ThumbnailWidth} imageWidths
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* @param {number} loadTime Time it took to load the thumbnail
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*/
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MMVP.displayRealThumbnail = function ( thumbnail, imageElement, imageWidths, loadTime ) {
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this.realThumbnailShown = true;
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this.setImage( this.ui, thumbnail, imageElement, imageWidths );
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// We only animate unblurWithAnimation if the image wasn't loaded from the cache
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// A load in < 10ms is considered to be a browser cache hit
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if ( this.blurredThumbnailShown && loadTime > 10 ) {
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this.ui.canvas.unblurWithAnimation();
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} else {
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this.ui.canvas.unblur();
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}
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mw.mmv.actionLogger.log( 'image-view' );
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};
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/**
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* Display the blurred thumbnail from the page
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* @param {mw.mmv.LightboxImage} image
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* @param {jQuery} $initialImage The thumbnail from the page
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* @param {mw.mmv.model.ThumbnailWidth} imageWidths
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* @param {boolean} [recursion=false] for internal use, never set this when calling from outside
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*/
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MMVP.displayPlaceholderThumbnail = function ( image, $initialImage, imageWidths, recursion ) {
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var viewer = this,
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size = { width : image.originalWidth, height : image.originalHeight };
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// If the actual image has already been displayed, there's no point showing the blurry one.
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// This can happen if the API request to get the original image size needed to show the
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// placeholder thumbnail takes longer then loading the actual thumbnail.
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if ( this.realThumbnailShown ) {
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return;
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}
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// Width/height of the original image are added to the HTML by MediaViewer via a PHP hook,
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// and can be missing in exotic circumstances, e. g. when the extension has only been
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// enabled recently and the HTML cache has not cleared yet. If that is the case, we need
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// to fetch the size from the API first.
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if ( !size.width || !size.height ) {
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if ( recursion ) {
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// this should not be possible, but an infinite recursion is nasty
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// business, so we make a sanity check
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throw 'MediaViewer internal error: displayPlaceholderThumbnail recursion';
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}
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this.imageInfoProvider.get( image.filePageTitle ).done( function ( imageInfo ) {
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// Make sure the user has not navigated away while we were waiting for the size
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if ( viewer.currentIndex === image.index ) {
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image.originalWidth = imageInfo.width;
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image.originalHeight = imageInfo.height;
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viewer.displayPlaceholderThumbnail( image, $initialImage, imageWidths, true );
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}
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} );
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} else {
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this.blurredThumbnailShown = this.ui.canvas.maybeDisplayPlaceholder(
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size, $initialImage, imageWidths );
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}
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};
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/**
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* @private
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* Image loading progress. Keyed by image (database) name + '|' + thumbnail width in pixels,
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* value is a number between 0-100.
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* @property {Object.<string, number>}
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*/
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MMVP.progressCache = {};
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/**
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* Displays a progress bar for the image loading, if necessary, and sets up handling of
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* all the related callbacks.
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* @param {mw.mmv.LightboxImage} image
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* @param {jQuery.Promise.<mw.mmv.model.Thumbnail, HTMLImageElement>} imagePromise
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* @param {number} imageWidth needed for caching progress (FIXME)
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*/
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MMVP.setupProgressBar = function ( image, imagePromise, imageWidth ) {
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var viewer = this,
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progressBar = viewer.ui.panel.progressBar,
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key = image.filePageTitle.getPrefixedDb() + '|' + imageWidth;
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if ( imagePromise.state() !== 'pending' ) {
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// image has already loaded (or failed to load) - do not show the progress bar
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progressBar.hide();
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return;
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}
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if ( !this.progressCache[key] ) {
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// Animate progress bar to 5 to give a sense that something is happening, and make sure
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// the progress bar is noticeable, even if we're sitting at 0% stuck waiting for
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// server-side processing, such as thumbnail (re)generation
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progressBar.jumpTo( 0 );
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progressBar.animateTo( 5 );
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viewer.progressCache[key] = 5;
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} else {
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progressBar.jumpTo( this.progressCache[key] );
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}
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// FIXME would be nice to have a "filtered" promise which does not fire when the image is not visible
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imagePromise.progress( function ( progress ) {
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// We pretend progress is always at least 5%, so progress events below 5% should be ignored
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// 100 will be handled by the done handler, do not mix two animations
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if ( progress < 5 || progress === 100 ) {
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return;
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}
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viewer.progressCache[key] = progress;
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// Touch the UI only if the user is looking at this image
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if ( viewer.currentIndex === image.index ) {
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progressBar.animateTo( progress );
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}
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} ).done( function () {
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viewer.progressCache[key] = 100;
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if ( viewer.currentIndex === image.index ) {
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// Fallback in case the browser doesn't have fancy progress updates
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progressBar.animateTo( 100 );
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}
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} ).fail( function () {
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viewer.progressCache[key] = 100;
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if ( viewer.currentIndex === image.index ) {
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// Hide progress bar on error
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progressBar.hide();
|
|
}
|
|
} );
|
|
};
|
|
|
|
/**
|
|
* Preload this many prev/next images to speed up navigation.
|
|
* (E.g. preloadDistance = 3 means that the previous 3 and the next 3 images will be loaded.)
|
|
* Preloading only happens when the viewer is open.
|
|
* @property {number}
|
|
*/
|
|
MMVP.preloadDistance = 1;
|
|
|
|
/**
|
|
* Stores image metadata preloads, so they can be cancelled.
|
|
* @property {mw.mmv.model.TaskQueue}
|
|
*/
|
|
MMVP.metadataPreloadQueue = null;
|
|
|
|
/**
|
|
* Stores image thumbnail preloads, so they can be cancelled.
|
|
* @property {mw.mmv.model.TaskQueue}
|
|
*/
|
|
MMVP.thumbnailPreloadQueue = null;
|
|
|
|
/**
|
|
* Orders lightboximage indexes for preloading. Works similar to $.each, except it only takes
|
|
* the callback argument. Calls the callback with each lightboximage index in some sequence
|
|
* that is ideal for preloading.
|
|
* @private
|
|
* @param {function(number, mw.mmv.LightboxImage)} callback
|
|
*/
|
|
MMVP.eachPrealoadableLightboxIndex = function( callback ) {
|
|
for ( var i = 0; i <= this.preloadDistance; i++ ) {
|
|
if ( this.currentIndex + i < this.thumbs.length ) {
|
|
callback(
|
|
this.currentIndex + i,
|
|
this.thumbs[ this.currentIndex + i ].image
|
|
);
|
|
}
|
|
if ( i && this.currentIndex - i >= 0 ) { // skip duplicate for i==0
|
|
callback(
|
|
this.currentIndex - i,
|
|
this.thumbs[ this.currentIndex - i ].image
|
|
);
|
|
}
|
|
}
|
|
};
|
|
|
|
/**
|
|
* A helper function to fill up the preload queues.
|
|
* taskFactory(lightboxImage) should return a preload task for the given lightboximage.
|
|
* @private
|
|
* @param {function(mw.mmv.LightboxImage): function()} taskFactory
|
|
* @return {mw.mmv.model.TaskQueue}
|
|
*/
|
|
MMVP.pushLightboxImagesIntoQueue = function( taskFactory ) {
|
|
var queue = new mw.mmv.model.TaskQueue();
|
|
|
|
this.eachPrealoadableLightboxIndex( function( i, lightboxImage ) {
|
|
queue.push( taskFactory( lightboxImage ) );
|
|
} );
|
|
|
|
return queue;
|
|
};
|
|
|
|
/**
|
|
* Cancels in-progress image metadata preloading.
|
|
*/
|
|
MMVP.cancelImageMetadataPreloading = function() {
|
|
if ( this.metadataPreloadQueue ) {
|
|
this.metadataPreloadQueue.cancel();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Cancels in-progress image thumbnail preloading.
|
|
*/
|
|
MMVP.cancelThumbnailsPreloading = function() {
|
|
if ( this.thumbnailPreloadQueue ) {
|
|
this.thumbnailPreloadQueue.cancel();
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Preload metadata for next and prev N image (N = MMVP.preloadDistance).
|
|
* Two images will be loaded at a time (one forward, one backward), with closer images
|
|
* being loaded sooner.
|
|
*/
|
|
MMVP.preloadImagesMetadata = function() {
|
|
var viewer = this;
|
|
|
|
this.cancelImageMetadataPreloading();
|
|
|
|
this.metadataPreloadQueue = this.pushLightboxImagesIntoQueue( function( lightboxImage ) {
|
|
return function() {
|
|
return viewer.fetchSizeIndependentLightboxInfo( lightboxImage.filePageTitle );
|
|
};
|
|
} );
|
|
|
|
this.metadataPreloadQueue.execute();
|
|
};
|
|
|
|
/**
|
|
* Preload thumbnails for next and prev N image (N = MMVP.preloadDistance).
|
|
* Two images will be loaded at a time (one forward, one backward), with closer images
|
|
* being loaded sooner.
|
|
*/
|
|
MMVP.preloadThumbnails = function() {
|
|
var viewer = this;
|
|
|
|
this.cancelThumbnailsPreloading();
|
|
|
|
this.thumbnailPreloadQueue = this.pushLightboxImagesIntoQueue( function( lightboxImage ) {
|
|
return function() {
|
|
// viewer.ui.canvas.getLightboxImageWidths needs the viewer to be open
|
|
// because it needs to read the size of visible elements
|
|
if ( !viewer.isOpen ) {
|
|
return;
|
|
}
|
|
|
|
return viewer.fetchThumbnailForLightboxImage(
|
|
lightboxImage,
|
|
viewer.ui.canvas.getLightboxImageWidths( lightboxImage ).real
|
|
);
|
|
};
|
|
} );
|
|
|
|
this.thumbnailPreloadQueue.execute();
|
|
};
|
|
|
|
/**
|
|
* Preload the fullscreen size of the current image.
|
|
*/
|
|
MMVP.preloadFullscreenThumbnail = function( image ) {
|
|
this.fetchThumbnailForLightboxImage(
|
|
image,
|
|
this.ui.canvas.getLightboxImageWidthsForFullscreen( image ).real
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Loads all the size-independent information needed by the lightbox (image metadata, repo
|
|
* information, uploader data).
|
|
* @param {mw.Title} fileTitle Title of the file page for the image.
|
|
* @returns {jQuery.Promise.<mw.mmv.model.Image, mw.mmv.model.Repo, mw.mmv.model.User>}
|
|
*/
|
|
MMVP.fetchSizeIndependentLightboxInfo = function ( fileTitle ) {
|
|
var viewer = this,
|
|
imageInfoPromise = this.imageInfoProvider.get( fileTitle ),
|
|
repoInfoPromise = this.fileRepoInfoProvider.get( fileTitle ),
|
|
userInfoPromise;
|
|
|
|
userInfoPromise = $.when(
|
|
imageInfoPromise, repoInfoPromise
|
|
).then( function( imageInfo, repoInfoHash ) {
|
|
if ( imageInfo.lastUploader ) {
|
|
return viewer.userInfoProvider.get( imageInfo.lastUploader, repoInfoHash[imageInfo.repo] );
|
|
} else {
|
|
return null;
|
|
}
|
|
} );
|
|
|
|
return $.when(
|
|
imageInfoPromise, repoInfoPromise, userInfoPromise
|
|
).then( function( imageInfo, repoInfoHash, userInfo ) {
|
|
return $.Deferred().resolve( imageInfo, repoInfoHash[imageInfo.repo], userInfo );
|
|
} );
|
|
};
|
|
|
|
/**
|
|
* Loads size-dependent components of a lightbox - the thumbnail model and the image itself.
|
|
* @param {mw.mmv.LightboxImage} image
|
|
* @param {number} width the width of the requested thumbnail
|
|
* @returns {jQuery.Promise.<mw.mmv.model.Thumbnail, HTMLImageElement>}
|
|
*/
|
|
MMVP.fetchThumbnailForLightboxImage = function ( image, width ) {
|
|
return this.fetchThumbnail(
|
|
image.filePageTitle,
|
|
width,
|
|
image.src,
|
|
image.originalWidth,
|
|
image.originalHeight
|
|
);
|
|
};
|
|
|
|
/**
|
|
* Loads size-dependent components of a lightbox - the thumbnail model and the image itself.
|
|
* @param {mw.Title} fileTitle
|
|
* @param {number} width the width of the requested thumbnail
|
|
* @param {string} [sampleUrl] a thumbnail URL for the same file (but with different size) (might be missing)
|
|
* @param {number} [originalWidth] the width of the original, full-sized file (might be missing)
|
|
* @param {number} [originalHeight] the height of the original, full-sized file (might be missing)
|
|
* @returns {jQuery.Promise.<mw.mmv.model.Thumbnail, HTMLImageElement>} A promise resolving to
|
|
* a thumbnail model and an <img> element. It might or might not have progress events which
|
|
* return a single number.
|
|
*/
|
|
MMVP.fetchThumbnail = function ( fileTitle, width, sampleUrl, originalWidth, originalHeight ) {
|
|
var viewer = this,
|
|
guessing = false,
|
|
thumbnailPromise,
|
|
imagePromise;
|
|
|
|
if ( originalWidth && width > originalWidth ) {
|
|
// Do not request images larger than the original image
|
|
// This would be possible (but still unwanted) for SVG images
|
|
width = originalWidth;
|
|
}
|
|
|
|
if (
|
|
sampleUrl && originalWidth && originalHeight &&
|
|
mw.config.get( 'wgMultimediaViewer' ).useThumbnailGuessing
|
|
) {
|
|
guessing = true;
|
|
thumbnailPromise = this.guessedThumbnailInfoProvider.get(
|
|
fileTitle, sampleUrl, width, originalWidth, originalHeight
|
|
).then( null, function () { // catch rejection, use fallback
|
|
return viewer.thumbnailInfoProvider.get( fileTitle, width );
|
|
} );
|
|
} else {
|
|
thumbnailPromise = this.thumbnailInfoProvider.get( fileTitle, width );
|
|
}
|
|
|
|
imagePromise = thumbnailPromise.then( function ( thumbnail ) {
|
|
return viewer.imageProvider.get( thumbnail.url );
|
|
} );
|
|
|
|
if ( guessing ) {
|
|
// If we guessed wrong, need to retry with real URL on failure.
|
|
// As a side effect this introduces an extra (harmless) retry of a failed thumbnailInfoProvider.get call
|
|
// because thumbnailInfoProvider.get is already called above when guessedThumbnailInfoProvider.get fails.
|
|
imagePromise = imagePromise.then( null, function () {
|
|
return viewer.thumbnailInfoProvider.get( fileTitle, width ).then( function ( thumbnail ) {
|
|
return viewer.imageProvider.get( thumbnail.url );
|
|
} );
|
|
} );
|
|
}
|
|
|
|
return $.when( thumbnailPromise, imagePromise ).then( null, null, function ( thumbnailProgress, imageProgress ) {
|
|
// Make progress events have a nice format.
|
|
return imageProgress[1];
|
|
} );
|
|
};
|
|
|
|
/**
|
|
* Loads an image at a specified index in the viewer's thumbnail array.
|
|
* @param {number} index
|
|
*/
|
|
MMVP.loadIndex = function ( index ) {
|
|
var thumb;
|
|
|
|
if ( index < this.thumbs.length && index >= 0 ) {
|
|
thumb = this.thumbs[ index ];
|
|
this.loadImage( thumb.image, thumb.$thumb.clone()[0] );
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Opens the next image
|
|
*/
|
|
MMVP.nextImage = function () {
|
|
mw.mmv.actionLogger.log( 'next-image' );
|
|
this.loadIndex( this.currentIndex + 1 );
|
|
};
|
|
|
|
/**
|
|
* Opens the previous image
|
|
*/
|
|
MMVP.prevImage = function () {
|
|
mw.mmv.actionLogger.log( 'prev-image' );
|
|
this.loadIndex( this.currentIndex - 1 );
|
|
};
|
|
|
|
/**
|
|
* Handles close event coming from the lightbox
|
|
*/
|
|
MMVP.close = function () {
|
|
var windowTitle = this.createDocumentTitle( null );
|
|
|
|
if ( comingFromHashChange === false ) {
|
|
$( document ).trigger( $.Event( 'mmv-hash', { hash : '#', title: windowTitle } ) );
|
|
} else {
|
|
comingFromHashChange = false;
|
|
}
|
|
|
|
// This has to happen after the hash reset, because setting the hash to # will reset the page scroll
|
|
$( document ).trigger( $.Event( 'mmv-cleanup-overlay' ) );
|
|
|
|
this.isOpen = false;
|
|
};
|
|
|
|
/**
|
|
* Handles a hash change coming from the browser
|
|
*/
|
|
MMVP.hash = function () {
|
|
var route = this.router.parseLocation( window.location );
|
|
|
|
if ( route instanceof mw.mmv.routing.ThumbnailRoute ) {
|
|
document.title = this.createDocumentTitle( route.fileTitle );
|
|
this.loadImageByTitle( route.fileTitle );
|
|
} else if ( this.isOpen ) {
|
|
// This allows us to avoid the mmv-hash event that normally happens on close
|
|
comingFromHashChange = true;
|
|
|
|
document.title = this.createDocumentTitle( null );
|
|
if ( this.ui ) {
|
|
// FIXME triggers mmv-close event, which calls viewer.close()
|
|
this.ui.unattach();
|
|
} else {
|
|
this.close();
|
|
}
|
|
}
|
|
};
|
|
|
|
MMVP.setHash = function() {
|
|
var route, windowTitle, hashFragment;
|
|
if ( !this.comingFromHashChange ) {
|
|
route = new mw.mmv.routing.ThumbnailRoute( this.currentImageFileTitle );
|
|
hashFragment = '#' + this.router.createHash( route );
|
|
windowTitle = this.createDocumentTitle( this.currentImageFileTitle );
|
|
$( document ).trigger( $.Event( 'mmv-hash', { hash : hashFragment, title: windowTitle } ) );
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Creates a string which can be shown as document title (the text at the top of the browser window).
|
|
* @param {mw.Title|null} imageTitle the title object for the image which is displayed; null when the
|
|
* viewer is being closed
|
|
* @return {string}
|
|
*/
|
|
MMVP.createDocumentTitle = function ( imageTitle ) {
|
|
if ( imageTitle ) {
|
|
return imageTitle.getNameText() + ' - ' + this.documentTitle;
|
|
} else {
|
|
return this.documentTitle;
|
|
}
|
|
};
|
|
|
|
/**
|
|
* @event mmv-close
|
|
* Fired when the viewer is closed. This is used by the ligthbox to notify the main app.
|
|
*/
|
|
/**
|
|
* @event mmv-next
|
|
* Fired when the user requests the next image.
|
|
*/
|
|
/**
|
|
* @event mmv-prev
|
|
* Fired when the user requests the previous image.
|
|
*/
|
|
/**
|
|
* @event mmv-resize-end
|
|
* Fired when the screen size changes. Debounced to avoid continous triggering while resizing with a mouse.
|
|
*/
|
|
/**
|
|
* @event mmv-request-thumbnail
|
|
* Used by components to request a thumbnail URL for the current thumbnail, with a given size.
|
|
* @param {number} size
|
|
*/
|
|
/**
|
|
* Registers all event handlers
|
|
*/
|
|
MMVP.setupEventHandlers = function () {
|
|
var viewer = this;
|
|
|
|
$( document ).on( 'mmv-close.mmvp', function () {
|
|
viewer.close();
|
|
} ).on( 'mmv-next.mmvp', function () {
|
|
viewer.nextImage();
|
|
} ).on( 'mmv-prev.mmvp', function () {
|
|
viewer.prevImage();
|
|
} ).on( 'mmv-resize-end.mmvp', function () {
|
|
viewer.resize( viewer.ui );
|
|
} ).on( 'mmv-request-thumbnail.mmvp', function ( e, size ) {
|
|
if ( viewer.currentImageFileTitle ) {
|
|
return viewer.thumbnailInfoProvider.get( viewer.currentImageFileTitle, size );
|
|
} else {
|
|
return $.Deferred().reject();
|
|
}
|
|
} ).on( 'mmv-viewfile.mmvp', function () {
|
|
viewer.imageInfoProvider.get( viewer.currentImageFileTitle ).done( function ( imageInfo ) {
|
|
document.location = imageInfo.url;
|
|
} );
|
|
} );
|
|
};
|
|
|
|
/**
|
|
* Unregisters all event handlers. Currently only used in tests.
|
|
*/
|
|
MMVP.cleanupEventHandlers = function () {
|
|
$( document ).off( 'mmv-close.mmvp mmv-next.mmvp mmv-prev.mmvp mmv-resize-end.mmvp' );
|
|
};
|
|
|
|
/**
|
|
* Preloads JS and CSS dependencies that aren't needed to display the first image, but could be needed later
|
|
*/
|
|
MMVP.preloadDependencies = function () {
|
|
mw.loader.load( [ 'mmv.ui.reuse.share', 'mmv.ui.reuse.embed', 'mmv.ui.reuse.download', 'moment' ] );
|
|
};
|
|
|
|
mw.mmv.MultimediaViewer = MultimediaViewer;
|
|
}( mediaWiki, jQuery ) );
|