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<?php
/**
* @copyright Copyright (c) 2016, ownCloud, Inc.
*
* @author Arthur Schiwon <blizzz@arthur-schiwon.de>
* @author Georg Ehrke <oc.list@georgehrke.com>
* @author Joas Schilling <coding@schilljs.com>
* @author Morris Jobke <hey@morrisjobke.de>
* @author Olivier Paroz <github@oparoz.com>
* @author Robin Appelman <robin@icewind.nl>
* @author Roeland Jago Douma <roeland@famdouma.nl>
*
* @license AGPL-3.0
*
* This code is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License, version 3,
* along with this program. If not, see <http://www.gnu.org/licenses/>
*
*/
namespace OC\Preview;
use OCP\Files\File;
use OCP\IImage;
use Psr\Log\LoggerInterface;
class SVG extends ProviderV2 {
/**
* {@inheritDoc}
*/
public function getMimeType(): string {
return '/image\/svg\+xml/';
}
/**
* {@inheritDoc}
*/
public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
try {
$svg = new \Imagick();
$svg->setBackgroundColor(new \ImagickPixel('transparent'));
$content = stream_get_contents($file->fopen('r'));
if (substr($content, 0, 5) !== '<?xml') {
$content = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $content;
}
// Do not parse SVG files with references
if (stripos($content, 'xlink:href') !== false) {
return null;
}
$svg->readImageBlob($content);
$svg->setImageFormat('png32');
} catch (\Exception $e) {
\OC::$server->get(LoggerInterface::class)->error($e->getMessage(), [
'exception' => $e,
'app' => 'core',
]);
return null;
}
//new image object
$image = new \OCP\Image();
$image->loadFromData((string) $svg);
//check if image object is valid
if ($image->valid()) {
$image->scaleDownToFit($maxX, $maxY);
return $image;
}
return null;
}
}
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