112 lines
3 KiB
PHP
112 lines
3 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2016, ownCloud, Inc.
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*
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* @author Joas Schilling <coding@schilljs.com>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Olivier Paroz <github@oparoz.com>
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* @author Robin McCorkell <robin@mccorkell.me.uk>
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\Preview;
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use OCP\IImage;
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use OCP\ILogger;
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use OCP\Files\File;
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abstract class Office extends ProviderV2 {
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private $cmd;
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/**
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* {@inheritDoc}
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*/
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public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
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$this->initCmd();
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if (is_null($this->cmd)) {
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return null;
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}
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$absPath = $this->getLocalFile($file);
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$tmpDir = \OC::$server->getTempManager()->getTempBaseDir();
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$defaultParameters = ' -env:UserInstallation=file://' . escapeshellarg($tmpDir . '/owncloud-' . \OC_Util::getInstanceId() . '/') . ' --headless --nologo --nofirststartwizard --invisible --norestore --convert-to png --outdir ';
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$clParameters = \OC::$server->getConfig()->getSystemValue('preview_office_cl_parameters', $defaultParameters);
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$exec = $this->cmd . $clParameters . escapeshellarg($tmpDir) . ' ' . escapeshellarg($absPath);
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shell_exec($exec);
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//create imagick object from png
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$pngPreview = null;
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try {
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list($dirname, , , $filename) = array_values(pathinfo($absPath));
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$pngPreview = $tmpDir . '/' . $filename . '.png';
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$png = new \imagick($pngPreview . '[0]');
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$png->setImageFormat('jpg');
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} catch (\Exception $e) {
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$this->cleanTmpFiles();
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unlink($pngPreview);
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\OC::$server->getLogger()->logException($e, [
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'level' => ILogger::ERROR,
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'app' => 'core',
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]);
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return null;
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}
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$image = new \OC_Image();
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$image->loadFromData($png);
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$this->cleanTmpFiles();
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unlink($pngPreview);
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if ($image->valid()) {
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$image->scaleDownToFit($maxX, $maxY);
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return $image;
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}
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return null;
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}
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private function initCmd() {
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$cmd = '';
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$libreOfficePath = \OC::$server->getConfig()->getSystemValue('preview_libreoffice_path', null);
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if (is_string($libreOfficePath)) {
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$cmd = $libreOfficePath;
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}
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$whichLibreOffice = shell_exec('command -v libreoffice');
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if ($cmd === '' && !empty($whichLibreOffice)) {
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$cmd = 'libreoffice';
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}
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$whichOpenOffice = shell_exec('command -v openoffice');
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if ($cmd === '' && !empty($whichOpenOffice)) {
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$cmd = 'openoffice';
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}
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if ($cmd === '') {
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$cmd = null;
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}
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$this->cmd = $cmd;
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}
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}
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