Extract preview from opendocument files

Signed-off-by: Julius Härtl <jus@bitgrid.net>

lib/private/Preview/OpenDocument.php

@@ -25,11 +25,26 @@
 namespace OC\Preview;
 
 //.odt, .ott, .oth, .odm, .odg, .otg, .odp, .otp, .ods, .ots, .odc, .odf, .odb, .odi, .oxt
-class OpenDocument extends Office {
+use OCP\Files\File;
+use OCP\IImage;
+
+class OpenDocument extends Bundled {
 	/**
 	 * {@inheritDoc}
 	 */
 	public function getMimeType(): string {
 		return '/application\/vnd.oasis.opendocument.*/';
 	}
+
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
+		$image = $this->extractThumbnail($file, 'Thumbnails/thumbnail.png');
+		if ($image->valid()) {
+			return $image;
+		}
+		return null;
+	}
 }

lib/private/PreviewManager.php

@@ -300,6 +300,7 @@ class PreviewManager implements IPreview {
 			Preview\MarkDown::class,
 			Preview\MP3::class,
 			Preview\TXT::class,
+			Preview\OpenDocument::class,
 		], $imageProviders));
 
 		if (in_array(Preview\Image::class, $this->defaultProviders)) {
@@ -340,6 +341,7 @@ class PreviewManager implements IPreview {
 		$this->registerCoreProvider(Preview\BMP::class, '/image\/bmp/');
 		$this->registerCoreProvider(Preview\XBitmap::class, '/image\/x-xbitmap/');
 		$this->registerCoreProvider(Preview\MP3::class, '/audio\/mpeg/');
+		$this->registerCoreProvider(Preview\OpenDocument::class, '/application\/vnd.oasis.opendocument.*/');
 
 		// SVG, Office and Bitmap require imagick
 		if (extension_loaded('imagick')) {