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-rw-r--r--ext/bg/js/media-utility.js132
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diff --git a/ext/bg/js/media-utility.js b/ext/bg/js/media-utility.js
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-/*
- * Copyright (C) 2020-2021 Yomichan Authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- */
-
-/**
- * MediaUtility is a class containing helper methods related to media processing.
- */
-class MediaUtility {
- /**
- * Gets the file extension of a file path. URL search queries and hash
- * fragments are not handled.
- * @param path The path to the file.
- * @returns The file extension, including the '.', or an empty string
- * if there is no file extension.
- */
- getFileNameExtension(path) {
- const match = /\.[^./\\]*$/.exec(path);
- return match !== null ? match[0] : '';
- }
-
- /**
- * Gets an image file's media type using a file path.
- * @param path The path to the file.
- * @returns The media type string if it can be determined from the file path,
- * otherwise null.
- */
- getImageMediaTypeFromFileName(path) {
- switch (this.getFileNameExtension(path).toLowerCase()) {
- case '.apng':
- return 'image/apng';
- case '.bmp':
- return 'image/bmp';
- case '.gif':
- return 'image/gif';
- case '.ico':
- case '.cur':
- return 'image/x-icon';
- case '.jpg':
- case '.jpeg':
- case '.jfif':
- case '.pjpeg':
- case '.pjp':
- return 'image/jpeg';
- case '.png':
- return 'image/png';
- case '.svg':
- return 'image/svg+xml';
- case '.tif':
- case '.tiff':
- return 'image/tiff';
- case '.webp':
- return 'image/webp';
- default:
- return null;
- }
- }
-
- /**
- * Gets the file extension for a corresponding media type.
- * @param mediaType The media type to use.
- * @returns A file extension including the dot for the media type,
- * otherwise null.
- */
- getFileExtensionFromImageMediaType(mediaType) {
- switch (mediaType) {
- case 'image/apng':
- return '.apng';
- case 'image/bmp':
- return '.bmp';
- case 'image/gif':
- return '.gif';
- case 'image/x-icon':
- return '.ico';
- case 'image/jpeg':
- return '.jpeg';
- case 'image/png':
- return '.png';
- case 'image/svg+xml':
- return '.svg';
- case 'image/tiff':
- return '.tiff';
- case 'image/webp':
- return '.webp';
- default:
- return null;
- }
- }
-
- /**
- * Gets the file extension for a corresponding media type.
- * @param mediaType The media type to use.
- * @returns A file extension including the dot for the media type,
- * otherwise null.
- */
- getFileExtensionFromAudioMediaType(mediaType) {
- switch (mediaType) {
- case 'audio/mpeg':
- case 'audio/mp3':
- return '.mp3';
- case 'audio/mp4':
- return '.mp4';
- case 'audio/ogg':
- case 'audio/vorbis':
- return '.ogg';
- case 'audio/vnd.wav':
- case 'audio/wave':
- case 'audio/wav':
- case 'audio/x-wav':
- case 'audio/x-pn-wav':
- return '.wav';
- case 'audio/flac':
- return '.flac';
- case 'audio/webm':
- return '.webm';
- default:
- return null;
- }
- }
-}