1 files changed, 50 insertions, 2 deletions
diff --git a/lib/private/PreviewManager.php b/lib/private/PreviewManager.php
index 109feb45864..0cda55751bf 100644
--- a/lib/private/PreviewManager.php
+++ b/lib/private/PreviewManager.php
@@ -25,13 +25,29 @@
  */
 namespace OC;
 
+use OC\Preview\Generator;
+use OCP\Files\File;
+use OCP\Files\IAppData;
+use OCP\Files\IRootFolder;
+use OCP\Files\NotFoundException;
+use OCP\Files\SimpleFS\ISimpleFile;
+use OCP\IConfig;
 use OCP\IPreview;
 use OCP\Preview\IProvider;
 
 class PreviewManager implements IPreview {
-	/** @var \OCP\IConfig */
+	/** @var IConfig */
 	protected $config;
 
+	/** @var IRootFolder */
+	protected $rootFolder;
+
+	/** @var IAppData */
+	protected $appData;
+
+	/** @var Generator */
+	private $generator;
+
 	/** @var bool */
 	protected $providerListDirty = false;
 
@@ -52,8 +68,12 @@ class PreviewManager implements IPreview {
 	 *
 	 * @param \OCP\IConfig $config
 	 */
-	public function __construct(\OCP\IConfig $config) {
+	public function __construct(IConfig $config,
+								IRootFolder $rootFolder,
+								IAppData $appData) {
 		$this->config = $config;
+		$this->rootFolder = $rootFolder;
+		$this->appData = $appData;
 	}
 
 	/**
@@ -121,6 +141,34 @@ class PreviewManager implements IPreview {
 	}
 
 	/**
+	 * Returns a preview of a file
+	 *
+	 * The cache is searched first and if nothing usable was found then a preview is
+	 * generated by one of the providers
+	 *
+	 * @param File $file
+	 * @param int $width
+	 * @param int $height
+	 * @param bool $crop
+	 * @param string $mode
+	 * @return ISimpleFile
+	 * @throws NotFoundException
+	 * @since 9.2.0
+	 */
+	public function getPreview(File $file, $width = -1, $height = -1, $crop = false, $mode = IPreview::MODE_FILL) {
+		if ($this->generator === null) {
+			$this->generator = new Generator(
+				$this->rootFolder,
+				$this->config,
+				$this,
+				$this->appData
+			);
+		}
+
+		return $this->generator->getPreview($file, $width, $height, $crop, $mode);
+	}
+
+	/**
 	 * returns true if the passed mime type is supported
 	 *
 	 * @param string $mimeType