2020-03-02 03:36:42 +00:00
|
|
|
/*
|
|
|
|
* Copyright (C) 2020 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/>.
|
|
|
|
*/
|
|
|
|
|
|
|
|
const mediaUtility = (() => {
|
2020-04-19 14:18:31 +00:00
|
|
|
function getFileNameExtension(path) {
|
|
|
|
const match = /\.[^./\\]*$/.exec(path);
|
2020-03-02 03:36:42 +00:00
|
|
|
return match !== null ? match[0] : '';
|
|
|
|
}
|
|
|
|
|
2020-04-19 14:18:31 +00:00
|
|
|
function getImageMediaTypeFromFileName(path) {
|
|
|
|
switch (getFileNameExtension(path).toLowerCase()) {
|
2020-03-02 03:36:42 +00:00
|
|
|
case '.apng':
|
|
|
|
return 'image/apng';
|
|
|
|
case '.bmp':
|
|
|
|
return 'image/bmp';
|
|
|
|
case '.gif':
|
|
|
|
return 'image/gif';
|
|
|
|
case '.ico':
|
|
|
|
case '.cur':
|
|
|
|
return 'image/x-icon';
|
|
|
|
case '.jpg':
|
|
|
|
case '.jpeg':
|
|
|
|
case '.jfif':
|
|
|
|
case '.pjpeg':
|
|
|
|
case '.pjp':
|
|
|
|
return 'image/jpeg';
|
|
|
|
case '.png':
|
|
|
|
return 'image/png';
|
|
|
|
case '.svg':
|
|
|
|
return 'image/svg+xml';
|
|
|
|
case '.tif':
|
|
|
|
case '.tiff':
|
|
|
|
return 'image/tiff';
|
|
|
|
case '.webp':
|
|
|
|
return 'image/webp';
|
|
|
|
default:
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2020-04-19 14:16:59 +00:00
|
|
|
function loadImage(mediaType, content) {
|
2020-03-02 03:36:42 +00:00
|
|
|
return new Promise((resolve, reject) => {
|
|
|
|
const image = new Image();
|
|
|
|
const eventListeners = new EventListenerCollection();
|
|
|
|
eventListeners.addEventListener(image, 'load', () => {
|
|
|
|
eventListeners.removeAllEventListeners();
|
|
|
|
resolve(image);
|
|
|
|
}, false);
|
|
|
|
eventListeners.addEventListener(image, 'error', () => {
|
|
|
|
eventListeners.removeAllEventListeners();
|
|
|
|
reject(new Error('Image failed to load'));
|
|
|
|
}, false);
|
2020-04-19 14:16:59 +00:00
|
|
|
image.src = `data:${mediaType};base64,${content}`;
|
2020-03-02 03:36:42 +00:00
|
|
|
});
|
|
|
|
}
|
|
|
|
|
|
|
|
return {
|
|
|
|
getImageMediaTypeFromFileName,
|
|
|
|
loadImage
|
|
|
|
};
|
|
|
|
})();
|