mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/MultimediaViewer
synced 2024-11-28 01:50:09 +00:00
279 lines
8.3 KiB
JavaScript
279 lines
8.3 KiB
JavaScript
/*
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* This file is part of the MediaWiki extension MediaViewer.
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*
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* MediaViewer 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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* MediaViewer 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 MediaViewer. If not, see <http://www.gnu.org/licenses/>.
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*/
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( function () {
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var CP;
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/**
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* Contains/retrieves configuration/environment information for MediaViewer.
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*
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* @class mw.mmv.Config
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* @constructor
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* @param {Object} viewerConfig
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* @param {mw.Map} mwConfig
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* @param {Object} mwUser
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* @param {mw.Api} api
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* @param {mw.SafeStorage} localStorage
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*/
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function Config( viewerConfig, mwConfig, mwUser, api, localStorage ) {
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/**
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* A plain object storing MediaViewer-specific settings
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*
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* @type {Object}
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*/
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this.viewerConfig = viewerConfig;
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/**
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* The mw.config object, for dependency injection
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*
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* @type {mw.Map}
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*/
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this.mwConfig = mwConfig;
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/**
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* mw.user object, for dependency injection
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*
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* @type {Object}
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*/
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this.mwUser = mwUser;
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/**
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* API object, for dependency injection
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*
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* @type {mw.Api}
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*/
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this.api = api;
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/**
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* The localStorage object, for dependency injection
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*
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* @type {mw.SafeStorage}
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*/
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this.localStorage = localStorage;
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}
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CP = Config.prototype;
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/**
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* Get value from local storage or fail gracefully.
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*
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* @param {string} key
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* @param {*} [fallback] value to return when key is not set or localStorage is not supported
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* @return {string|null} stored value or fallback or null if neither exists
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*/
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CP.getFromLocalStorage = function ( key, fallback ) {
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var value = this.localStorage.get( key );
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// localStorage will only store strings; if values `null`, `false` or
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// `0` are set, they'll come out as `"null"`, `"false"` or `"0"`, so we
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// can be certain that an actual null is a failure to locate the item,
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// and false is an issue with localStorage itself
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if ( value !== null && value !== false ) {
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return value;
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}
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if ( value === null ) {
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mw.log( 'Failed to fetch item ' + key + ' from localStorage' );
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}
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return fallback !== undefined ? fallback : null;
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};
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/**
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* Set item in local storage or fail gracefully.
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*
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* @param {string} key
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* @param {*} value
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* @return {boolean} whether storing the item was successful
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*/
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CP.setInLocalStorage = function ( key, value ) {
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return this.localStorage.set( key, value );
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};
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/**
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* Remove item from local storage or fail gracefully.
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*
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* @param {string} key
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* @return {boolean} whether storing the item was successful
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*/
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CP.removeFromLocalStorage = function ( key ) {
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this.localStorage.remove( key );
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// mw.storage.remove catches all exceptions and returns false if any
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// occur, so we can't distinguish between actual issues, and
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// localStorage not being supported - however, localStorage.removeItem
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// is not documented to throw any errors, so nothing to worry about;
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// when localStorage is not supported, we'll consider removal successful
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// (it can't have been there in the first place)
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return true;
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};
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/**
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* Set user preference via AJAX
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*
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* @param {string} key
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* @param {string} value
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* @return {jQuery.Promise} a deferred which resolves/rejects on success/failure respectively
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*/
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CP.setUserPreference = function ( key, value ) {
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return this.api.saveOption( key, value );
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};
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/**
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* Returns true if MediaViewer should handle thumbnail clicks.
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*
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* @return {boolean}
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*/
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CP.isMediaViewerEnabledOnClick = function () {
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// IMPORTANT: mmv.head.js uses the same logic but does not use this class to be lightweight. Make sure to keep it in sync.
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return this.mwConfig.get( 'wgMediaViewer' ) && // global opt-out switch, can be set in user JS
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this.mwConfig.get( 'wgMediaViewerOnClick' ) && // thumbnail opt-out, can be set in preferences
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( !this.mwUser.isAnon() || this.getFromLocalStorage( 'wgMediaViewerOnClick', '1' ) === '1' ); // thumbnail opt-out for anons
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};
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/**
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* (Semi-)permanently stores the setting whether MediaViewer should handle thumbnail clicks.
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* - for logged-in users, we use preferences
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* - for anons, we use localStorage
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* - for anons with old browsers, we don't do anything
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*
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* @param {boolean} enabled
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* @return {jQuery.Promise} a deferred which resolves/rejects on success/failure respectively
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*/
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CP.setMediaViewerEnabledOnClick = function ( enabled ) {
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var deferred,
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newPrefValue,
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defaultPrefValue = this.mwConfig.get( 'wgMediaViewerEnabledByDefault' ),
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config = this,
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success = true;
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if ( this.mwUser.isAnon() ) {
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if ( !enabled ) {
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success = this.setInLocalStorage( 'wgMediaViewerOnClick', '0' ); // localStorage stringifies everything, best use strings in the first place
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} else {
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success = this.removeFromLocalStorage( 'wgMediaViewerOnClick' );
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}
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if ( success ) {
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deferred = $.Deferred().resolve();
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} else {
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deferred = $.Deferred().reject();
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}
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} else {
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// Simulate changing the option in Special:Preferences. Turns out this is quite hard (bug 69942):
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// we need to delete the user_properties row if the new setting is the same as the default,
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// otherwise set '1' for enabled, '' for disabled. In theory the pref API will delete the row
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// if the new value equals the default, but this does not always work.
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if ( defaultPrefValue === true ) {
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newPrefValue = enabled ? '1' : '';
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} else {
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// undefined will cause the API call to omit the optionvalue parameter
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// which in turn will cause the options API to delete the row and revert the pref to default
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newPrefValue = enabled ? '1' : undefined;
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}
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deferred = this.setUserPreference( 'multimediaviewer-enable', newPrefValue );
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}
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return deferred.done( function () {
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// make the change work without a reload
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config.mwConfig.set( 'wgMediaViewerOnClick', enabled );
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if ( !enabled ) {
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// set flag for showing a popup if this was a first-time disable
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config.maybeEnableStatusInfo();
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}
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} );
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};
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/**
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* True if info about enable/disable status should be displayed (mingle #719).
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*
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* @return {boolean}
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*/
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CP.shouldShowStatusInfo = function () {
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return !this.isMediaViewerEnabledOnClick() && this.getFromLocalStorage( 'mmv-showStatusInfo' ) === '1';
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};
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/**
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* Called when MediaViewer is disabled. If status info was never displayed before, future
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* shouldShowStatusInfo() calls will return true.
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*
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* @private
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*/
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CP.maybeEnableStatusInfo = function () {
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var currentShowStatusInfo = this.getFromLocalStorage( 'mmv-showStatusInfo' );
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if ( currentShowStatusInfo === null ) {
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this.setInLocalStorage( 'mmv-showStatusInfo', '1' );
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}
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};
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/**
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* Called when status info is displayed. Future shouldShowStatusInfo() calls will return false.
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*/
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CP.disableStatusInfo = function () {
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this.setInLocalStorage( 'mmv-showStatusInfo', '0' );
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};
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/**
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* Returns file extensions handled by Media Viewer.
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*
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* The object's keys are the file extensions.
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* The object's values are either 'default' when Media Viewer handles that file extension
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* directly or the name of a ResourceLoader module to load when such a file is opened.
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*
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* @return {Object}
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*/
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CP.extensions = function () {
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return this.viewerConfig.extensions;
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};
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/**
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* Returns UI language
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*
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* @return {string} Language code
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*/
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CP.language = function () {
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return this.mwConfig.get( 'wgUserLanguage', false ) || this.mwConfig.get( 'wgContentLanguage', 'en' );
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};
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/**
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* Returns URI of virtual view beacon or false if not set
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*
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* @return {string|boolean} URI
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*/
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CP.recordVirtualViewBeaconURI = function () {
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return this.viewerConfig.recordVirtualViewBeaconURI;
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};
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/**
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* Returns useThumbnailGuessing flag
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*
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* @return {boolean}
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*/
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CP.useThumbnailGuessing = function () {
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return this.viewerConfig.useThumbnailGuessing;
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};
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/**
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* Returns imageQueryParameter, if set
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*
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* @return {string|boolean}
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*/
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CP.imageQueryParameter = function () {
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return this.viewerConfig.imageQueryParameter;
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};
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mw.mmv.Config = Config;
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}() );
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