Add preview provider for Krita files

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

2 files changed, 54 insertions, 4 deletions

diff --git a/lib/private/Preview/Bundled.php b/lib/private/Preview/Bundled.php
index 6f3d811ca61..afd286d895b 100644
--- a/lib/private/Preview/Bundled.php
+++ b/lib/private/Preview/Bundled.php
@@ -23,10 +23,9 @@
 
 namespace OC\Preview;
 
+use OC\Archive\ZIP;
 use OCP\Files\File;
-use OCP\Files\NotPermittedException;
 use OCP\IImage;
-use OCP\Lock\LockedException;
 
 /**
  * Extracts a preview from files that embed them in an ZIP archive
@@ -39,10 +38,9 @@ abstract class Bundled extends ProviderV2 {
 
 		try {
 			$content = $file->fopen('r');
-			$content = stream_get_contents($content);
 			file_put_contents($sourceTmp, $content);
 
-			$zip = new \OC\Archive\ZIP($sourceTmp);
+			$zip = new ZIP($sourceTmp);
 			$zip->extractFile($path, $targetTmp);
 
 			$image = new \OC_Image();
diff --git a/lib/private/Preview/Krita.php b/lib/private/Preview/Krita.php
new file mode 100644
index 00000000000..39449145a14
--- /dev/null
+++ b/lib/private/Preview/Krita.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * @copyright Copyright (c) 2020 Julius Härtl <jus@bitgrid.net>
+ *
+ * @author Julius Härtl <jus@bitgrid.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * 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
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\Preview;
+
+use OCP\Files\File;
+use OCP\IImage;
+
+class Krita extends Bundled {
+	/**
+	 * {@inheritDoc}
+	 */
+	public function getMimeType(): string {
+		return '/application\/x-krita/';
+	}
+
+
+	/**
+	 * @inheritDoc
+	 */
+	public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
+		$image = $this->extractThumbnail($file, 'mergedimage.png');
+		if ($image->valid()) {
+			return $image;
+		}
+		$image = $this->extractThumbnail($file, 'preview.png');
+		if ($image->valid()) {
+			return $image;
+		}
+		return null;
+	}
+}