110 lines
2.9 KiB
PHP
110 lines
2.9 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 Arthur Schiwon <blizzz@arthur-schiwon.de>
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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 Appelman <robin@icewind.nl>
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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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* @author Tor Lillqvist <tml@collabora.com>
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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\Files\File;
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use OCP\Files\FileInfo;
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use OCP\IImage;
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use OCP\ITempManager;
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use OCP\Server;
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abstract class Office extends ProviderV2 {
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/**
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* {@inheritDoc}
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*/
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public function isAvailable(FileInfo $file): bool {
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return is_string($this->options['officeBinary']);
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}
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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 $maxY): ?IImage {
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if (!$this->isAvailable($file)) {
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return null;
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}
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$tempManager = Server::get(ITempManager::class);
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// The file to generate the preview for.
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$absPath = $this->getLocalFile($file);
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// The destination for the LibreOffice user profile.
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// LibreOffice can rune once per user profile and therefore instance id and file id are included.
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$profile = $tempManager->getTemporaryFolder(
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'nextcloud-office-profile-' . \OC_Util::getInstanceId() . '-' . $file->getId()
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);
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// The destination for the LibreOffice convert result.
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$outdir = $tempManager->getTemporaryFolder(
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'nextcloud-office-preview-' . \OC_Util::getInstanceId() . '-' . $file->getId()
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);
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if ($profile === false || $outdir === false) {
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$this->cleanTmpFiles();
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return null;
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}
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$parameters = [
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$this->options['officeBinary'],
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'-env:UserInstallation=file://' . escapeshellarg($profile),
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'--headless',
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'--nologo',
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'--nofirststartwizard',
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'--invisible',
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'--norestore',
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'--convert-to png',
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'--outdir ' . escapeshellarg($outdir),
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escapeshellarg($absPath),
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];
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$cmd = implode(' ', $parameters);
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exec($cmd, $output, $returnCode);
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if ($returnCode !== 0) {
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$this->cleanTmpFiles();
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return null;
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}
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$preview = $outdir . pathinfo($absPath, PATHINFO_FILENAME) . '.png';
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$image = new \OCP\Image();
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$image->loadFromFile($preview);
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$this->cleanTmpFiles();
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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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}
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