Use the PreviewManager where possible

apps/files_sharing/templates/public.php

@@ -20,10 +20,10 @@ OCP\Util::addScript('files', 'filelist');
 OCP\Util::addscript('files', 'keyboardshortcuts');
 
 $thumbSize=1024;
-$previewSupported = OC\Preview::isMimeSupported($_['mimetype']) ? 'true' : 'false';
+$previewSupported = \OC::$server->getPreviewManager()->isMimeSupported($_['mimetype']) ? 'true' : 'false';
 ?>
 
-<?php if ( \OC\Preview::isMimeSupported($_['mimetype'])): /* This enables preview images for links (e.g. on Facebook, Google+, ...)*/?>
+<?php if ($previewSupported === 'true'): /* This enables preview images for links (e.g. on Facebook, Google+, ...)*/?>
 	<link rel="image_src" href="<?php p(OCP\Util::linkToRoute( 'core_ajax_public_preview', array('x' => $thumbSize, 'y' => $thumbSize, 'file' => $_['directory_path'], 't' => $_['dirToken']))); ?>" />
 <?php endif; ?>
 

core/ajax/preview.php

@@ -29,13 +29,12 @@ if ($maxX === 0 || $maxY === 0) {
 	exit;
 }
 
-$preview = new \OC\Preview(\OC_User::getUser(), 'files');
-
 $info = \OC\Files\Filesystem::getFileInfo($file);
 
-if (!$info instanceof OCP\Files\FileInfo || !$always && !$preview->isAvailable($info)) {
+if (!$info instanceof OCP\Files\FileInfo || !$always && !\OC::$server->getPreviewManager()->isAvailable($info)) {
 	\OC_Response::setStatus(404);
 } else {
+	$preview = new \OC\Preview(\OC_User::getUser(), 'files');
 	$preview->setFile($file);
 	$preview->setMaxX($maxX);
 	$preview->setMaxY($maxY);