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- <?php
- /**
- * @copyright Copyright (c) 2016, ownCloud, Inc.
- *
- * @author Arthur Schiwon <blizzz@arthur-schiwon.de>
- * @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 Robin McCorkell <robin@mccorkell.me.uk>
- * @author Roeland Jago Douma <roeland@famdouma.nl>
- * @author Tor Lillqvist <tml@collabora.com>
- *
- * @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\Files\FileInfo;
- use OCP\IImage;
- use Psr\Log\LoggerInterface;
- abstract class Office extends ProviderV2 {
- /**
- * {@inheritDoc}
- */
- public function isAvailable(FileInfo $file): bool {
- return is_string($this->options['officeBinary']);
- }
- /**
- * {@inheritDoc}
- */
- public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
- if (!$this->isAvailable($file)) {
- return null;
- }
- $absPath = $this->getLocalFile($file);
- $tmpDir = \OC::$server->getTempManager()->getTempBaseDir();
- $defaultParameters = ' -env:UserInstallation=file://' . escapeshellarg($tmpDir . '/owncloud-' . \OC_Util::getInstanceId() . '/') . ' --headless --nologo --nofirststartwizard --invisible --norestore --convert-to png --outdir ';
- $clParameters = \OC::$server->getConfig()->getSystemValue('preview_office_cl_parameters', $defaultParameters);
- $cmd = $this->options['officeBinary'] . $clParameters . escapeshellarg($tmpDir) . ' ' . escapeshellarg($absPath);
- exec($cmd, $output, $returnCode);
- if ($returnCode !== 0) {
- $this->cleanTmpFiles();
- return null;
- }
- //create imagick object from png
- $pngPreview = null;
- try {
- [$dirname, , , $filename] = array_values(pathinfo($absPath));
- $pngPreview = $tmpDir . '/' . $filename . '.png';
- $png = new \imagick($pngPreview . '[0]');
- $png->setImageFormat('jpg');
- } catch (\Exception $e) {
- $this->cleanTmpFiles();
- unlink($pngPreview);
- \OC::$server->get(LoggerInterface::class)->error($e->getMessage(), [
- 'exception' => $e,
- 'app' => 'core',
- ]);
- return null;
- }
- $image = new \OCP\Image();
- $image->loadFromData((string) $png);
- $this->cleanTmpFiles();
- unlink($pngPreview);
- if ($image->valid()) {
- $image->scaleDownToFit($maxX, $maxY);
- return $image;
- }
- return null;
- }
- }
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