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<?php
/**
* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
* SPDX-License-Identifier: AGPL-3.0-only
*/
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 {
$content = stream_get_contents($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 (preg_match('/["\s](xlink:)?href\s*=/i', $content)) {
return null;
}
$svg = new \Imagick();
$svg->pingImageBlob($content);
$mimeType = $svg->getImageMimeType();
if (!preg_match($this->getMimeType(), $mimeType)) {
throw new \Exception('File mime type does not match the preview provider: ' . $mimeType);
}
$svg->setBackgroundColor(new \ImagickPixel('transparent'));
$svg->readImageBlob($content);
$svg->setImageFormat('png32');
} catch (\Exception $e) {
\OC::$server->get(LoggerInterface::class)->error(
'File: ' . $file->getPath() . ' Imagick says:',
[
'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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