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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\IImage;
use OCP\ILogger;
abstract class Office extends ProviderV2 {
private $cmd;
/**
* {@inheritDoc}
*/
public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
$this->initCmd();
if (is_null($this->cmd)) {
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);
$exec = $this->cmd . $clParameters . escapeshellarg($tmpDir) . ' ' . escapeshellarg($absPath);
shell_exec($exec);
//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::$server->getLogger()->logException($e, [
'level' => ILogger::ERROR,
'app' => 'core',
]);
return null;
}
$image = new \OC_Image();
$image->loadFromData($png);
$this->cleanTmpFiles();
unlink($pngPreview);
if ($image->valid()) {
$image->scaleDownToFit($maxX, $maxY);
return $image;
}
return null;
}
private function initCmd() {
$cmd = '';
$libreOfficePath = \OC::$server->getConfig()->getSystemValue('preview_libreoffice_path', null);
if (is_string($libreOfficePath)) {
$cmd = $libreOfficePath;
}
$whichLibreOffice = shell_exec('command -v libreoffice');
if ($cmd === '' && !empty($whichLibreOffice)) {
$cmd = 'libreoffice';
}
$whichOpenOffice = shell_exec('command -v openoffice');
if ($cmd === '' && !empty($whichOpenOffice)) {
$cmd = 'openoffice';
}
if ($cmd === '') {
$cmd = null;
}
$this->cmd = $cmd;
}
}
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