diff --git a/lib/preview.php b/lib/preview.php
index 855d5a9da0..1150681e64 100755
--- a/lib/preview.php
+++ b/lib/preview.php
@@ -57,7 +57,7 @@ class Preview {
 	 *					false if thumbnail does not exist
 	 *					path to thumbnail if thumbnail exists
 	*/
-	public function __construct($user = null, $root = '', $file = '', $maxX = 0, $maxY = 0, $scalingup = true, $force = false){
+	public function __construct($user=null, $root='', $file='', $maxX=0, $maxY=0, $scalingup=true, $force=false) {
 		//set config
 		$this->max_x = \OC_Config::getValue('preview_max_x', null);
 		$this->max_y = \OC_Config::getValue('preview_max_y', null);
@@ -73,46 +73,46 @@ class Preview {
 		$this->fileview = new \OC\Files\View('/' . $user . '/' . $root);
 		$this->userview = new \OC\Files\View('/' . $user);
 
-		if($force !== true){
-			if(!is_null($this->max_x)){
-				if($this->maxX > $this->max_x){
+		if($force !== true) {
+			if(!is_null($this->max_x)) {
+				if($this->maxX > $this->max_x) {
 					\OC_Log::write('core', 'maxX reduced from ' . $this->maxX . ' to ' . $this->max_x, \OC_Log::DEBUG);
 					$this->maxX = $this->max_x;
 				}
 			}
 	
-			if(!is_null($this->max_y)){
-				if($this->maxY > $this->max_y){
+			if(!is_null($this->max_y)) {
+				if($this->maxY > $this->max_y) {
 					\OC_Log::write('core', 'maxY reduced from ' . $this->maxY . ' to ' . $this->max_y, \OC_Log::DEBUG);
 					$this->maxY = $this->max_y;
 				}
 			}
 	
 			//init providers
-			if(empty(self::$providers)){
+			if(empty(self::$providers)) {
 				self::initProviders();
 			}
 	
 			//check if there are any providers at all
-			if(empty(self::$providers)){
+			if(empty(self::$providers)) {
 				\OC_Log::write('core', 'No preview providers exist', \OC_Log::ERROR);
 				throw new \Exception('No providers');
 			}
 	
 			//validate parameters
-			if($file === ''){
+			if($file === '') {
 				\OC_Log::write('core', 'No filename passed', \OC_Log::ERROR);
 				throw new \Exception('File not found');
 			}
 	
 			//check if file exists
-			if(!$this->fileview->file_exists($file)){
+			if(!$this->fileview->file_exists($file)) {
 				\OC_Log::write('core', 'File:"' . $file . '" not found', \OC_Log::ERROR);
 				throw new \Exception('File not found');
 			}
 	
 			//check if given size makes sense
-			if($maxX === 0 || $maxY === 0){
+			if($maxX === 0 || $maxY === 0) {
 				\OC_Log::write('core', 'Can not create preview with 0px width or 0px height', \OC_Log::ERROR);
 				throw new \Exception('Height and/or width set to 0');
 			}
@@ -123,7 +123,7 @@ class Preview {
 	 * @brief returns the path of the file you want a thumbnail from
 	 * @return string
 	*/
-	public function	getFile(){
+	public function	getFile() {
 		return $this->file;
 	}
 
@@ -131,7 +131,7 @@ class Preview {
 	 * @brief returns the max width of the preview
 	 * @return integer
 	*/
-	public function getMaxX(){
+	public function getMaxX() {
 		return $this->maxX;
 	}
 
@@ -139,7 +139,7 @@ class Preview {
 	 * @brief returns the max height of the preview
 	 * @return integer
 	*/
-	public function getMaxY(){
+	public function getMaxY() {
 		return $this->maxY;
 	}
 
@@ -147,7 +147,7 @@ class Preview {
 	 * @brief returns whether or not scalingup is enabled
 	 * @return bool
 	*/
-	public function getScalingup(){
+	public function getScalingup() {
 		return $this->scalingup;
 	}
 
@@ -155,7 +155,7 @@ class Preview {
 	 * @brief returns the name of the thumbnailfolder
 	 * @return string
 	*/
-	public function getThumbnailsfolder(){
+	public function getThumbnailsfolder() {
 		return self::THUMBNAILS_FOLDER;
 	}
 
@@ -163,7 +163,7 @@ class Preview {
 	 * @brief returns the max scale factor
 	 * @return integer
 	*/
-	public function getMaxScaleFactor(){
+	public function getMaxScaleFactor() {
 		return $this->max_scale_factor;
 	}
 
@@ -171,7 +171,7 @@ class Preview {
 	 * @brief returns the max width set in ownCloud's config
 	 * @return integer
 	*/
-	public function getConfigMaxX(){
+	public function getConfigMaxX() {
 		return $this->max_x;
 	}
 
@@ -179,7 +179,7 @@ class Preview {
 	 * @brief returns the max height set in ownCloud's config
 	 * @return integer
 	*/
-	public function getConfigMaxY(){
+	public function getConfigMaxY() {
 		return $this->max_y;
 	}
 
@@ -187,7 +187,7 @@ class Preview {
 	 * @brief deletes previews of a file with specific x and y
 	 * @return bool
 	*/
-	public function deletePreview(){
+	public function deletePreview() {
 		$fileinfo = $this->fileview->getFileInfo($this->file);
 		$fileid = $fileinfo['fileid'];
 
@@ -199,7 +199,7 @@ class Preview {
 	 * @brief deletes all previews of a file
 	 * @return bool
 	*/
-	public function deleteAllPreviews(){
+	public function deleteAllPreviews() {
 		$fileinfo = $this->fileview->getFileInfo($this->file);
 		$fileid = $fileinfo['fileid'];
 
@@ -214,7 +214,7 @@ class Preview {
 	 *				false if thumbnail does not exist
 	 *				path to thumbnail if thumbnail exists
 	*/
-	private function isCached(){
+	private function isCached() {
 		$file = $this->file;
 		$maxX = $this->maxX;
 		$maxY = $this->maxY;
@@ -223,12 +223,12 @@ class Preview {
 		$fileinfo = $this->fileview->getFileInfo($file);
 		$fileid = $fileinfo['fileid'];
 
-		if(!$this->userview->is_dir(self::THUMBNAILS_FOLDER . '/' . $fileid)){
+		if(!$this->userview->is_dir(self::THUMBNAILS_FOLDER . '/' . $fileid)) {
 			return false;
 		}
 
 		//does a preview with the wanted height and width already exist?
-		if($this->userview->file_exists(self::THUMBNAILS_FOLDER . '/' . $fileid . '/' . $maxX . '-' . $maxY . '.png')){
+		if($this->userview->file_exists(self::THUMBNAILS_FOLDER . '/' . $fileid . '/' . $maxX . '-' . $maxY . '.png')) {
 			return self::THUMBNAILS_FOLDER . '/' . $fileid . '/' . $maxX . '-' . $maxY . '.png';
 		}
 
@@ -238,20 +238,20 @@ class Preview {
 		$possiblethumbnails = array();
 
 		$allthumbnails = $this->userview->getDirectoryContent(self::THUMBNAILS_FOLDER . '/' . $fileid);
-		foreach($allthumbnails as $thumbnail){
+		foreach($allthumbnails as $thumbnail) {
 			$size = explode('-', $thumbnail['name']);
 			$x = $size[0];
 			$y = $size[1];
 
 			$aspectratio = $x / $y;
-			if($aspectratio != $wantedaspectratio){
+			if($aspectratio != $wantedaspectratio) {
 				continue;
 			}
 
-			if($x < $maxX || $y < $maxY){
-				if($scalingup){
+			if($x < $maxX || $y < $maxY) {
+				if($scalingup) {
 					$scalefactor = $maxX / $x;
-					if($scalefactor > $this->max_scale_factor){
+					if($scalefactor > $this->max_scale_factor) {
 						continue;
 					}
 				}else{
@@ -261,26 +261,26 @@ class Preview {
 			$possiblethumbnails[$x] = $thumbnail['path'];
 		}
 
-		if(count($possiblethumbnails) === 0){
+		if(count($possiblethumbnails) === 0) {
 			return false;
 		}
 
-		if(count($possiblethumbnails) === 1){
+		if(count($possiblethumbnails) === 1) {
 			return current($possiblethumbnails);
 		}
 
 		ksort($possiblethumbnails);
 
-		if(key(reset($possiblethumbnails)) > $maxX){
+		if(key(reset($possiblethumbnails)) > $maxX) {
 			return current(reset($possiblethumbnails));
 		}
 
-		if(key(end($possiblethumbnails)) < $maxX){
+		if(key(end($possiblethumbnails)) < $maxX) {
 			return current(end($possiblethumbnails));
 		}
 
-		foreach($possiblethumbnails as $width => $path){
-			if($width < $maxX){
+		foreach($possiblethumbnails as $width => $path) {
+			if($width < $maxX) {
 				continue;
 			}else{
 				return $path;
@@ -296,7 +296,7 @@ class Preview {
 	 * @param $scaleup Scale smaller images up to the thumbnail size or not. Might look ugly
 	 * @return image
 	*/
-	public function getPreview(){
+	public function getPreview() {
 		$file = $this->file;
 		$maxX = $this->maxX;
 		$maxY = $this->maxY;
@@ -307,7 +307,7 @@ class Preview {
 
 		$cached = self::isCached();
 
-		if($cached){
+		if($cached) {
 			$image = new \OC_Image($this->userview->file_get_contents($cached, 'r'));
 			$this->preview = $image;
 		}else{
@@ -315,25 +315,25 @@ class Preview {
 
 			$preview;
 
-			foreach(self::$providers as $supportedmimetype => $provider){
-				if(!preg_match($supportedmimetype, $mimetype)){
+			foreach(self::$providers as $supportedmimetype => $provider) {
+				if(!preg_match($supportedmimetype, $mimetype)) {
 					continue;
 				}
 
 				$preview = $provider->getThumbnail($file, $maxX, $maxY, $scalingup, $this->fileview);
 
-				if(!$preview){
+				if(!$preview) {
 					continue;
 				}
 
 				//are there any cached thumbnails yet
-				if($this->userview->is_dir(self::THUMBNAILS_FOLDER . '/') === false){
+				if($this->userview->is_dir(self::THUMBNAILS_FOLDER . '/') === false) {
 					$this->userview->mkdir(self::THUMBNAILS_FOLDER . '/');
 				}
 
 				//cache thumbnail
 				$cachepath = self::THUMBNAILS_FOLDER . '/' . $fileid . '/' . $maxX . '-' . $maxY . '.png';
-				if($this->userview->is_dir(self::THUMBNAILS_FOLDER . '/' . $fileid . '/') === false){
+				if($this->userview->is_dir(self::THUMBNAILS_FOLDER . '/' . $fileid . '/') === false) {
 					$this->userview->mkdir(self::THUMBNAILS_FOLDER . '/' . $fileid . '/');
 				}
 				$this->userview->file_put_contents($cachepath, $preview->data());
@@ -354,10 +354,10 @@ class Preview {
 	 * @param $scaleup Scale smaller images up to the thumbnail size or not. Might look ugly
 	 * @return void
 	*/
-	public function showPreview(){
+	public function showPreview() {
 		\OCP\Response::enableCaching(3600 * 24); // 24 hour
 		$preview = $this->getPreview();
-		if($preview){
+		if($preview) {
 			$preview->show();
 		}
 	}
@@ -366,7 +366,7 @@ class Preview {
 	 * @brief resize, crop and fix orientation
 	 * @return image
 	*/
-	public function resizeAndCrop(){
+	public function resizeAndCrop() {
 		$this->preview->fixOrientation();
 
 		$image = $this->preview;
@@ -374,7 +374,7 @@ class Preview {
 		$y = $this->maxY;
 		$scalingup = $this->scalingup;
 
-		if(!($image instanceof \OC_Image)){
+		if(!($image instanceof \OC_Image)) {
 			\OC_Log::write('core', 'Object passed to resizeAndCrop is not an instance of OC_Image', \OC_Log::DEBUG);
 			return;
 		}
@@ -382,14 +382,14 @@ class Preview {
 		$realx = (int) $image->width();
 		$realy = (int) $image->height();
 
-		if($x === $realx && $y === $realy){
+		if($x === $realx && $y === $realy) {
 			return $image;
 		}
 
 		$factorX = $x / $realx;
 		$factorY = $y / $realy;
 		
-		if($factorX >= $factorY){
+		if($factorX >= $factorY) {
 			$factor = $factorX;
 		}else{
 			$factor = $factorY;
@@ -399,8 +399,8 @@ class Preview {
 		if($scalingup === false) {
 			if($factor>1) $factor=1;
 		}
-		if(!is_null($this->max_scale_factor)){
-			if($factor > $this->max_scale_factor){
+		if(!is_null($this->max_scale_factor)) {
+			if($factor > $this->max_scale_factor) {
 				\OC_Log::write('core', 'scalefactor reduced from ' . $factor . ' to ' . $this->max_scale_factor, \OC_Log::DEBUG);
 				$factor = $this->max_scale_factor;
 			}
@@ -411,12 +411,12 @@ class Preview {
 		// resize
 		$image->preciseResize($newXsize, $newYsize);
 
-		if($newXsize === $x && $newYsize === $y){
+		if($newXsize === $x && $newYsize === $y) {
 			$this->preview = $image;
 			return;
 		}
 
-		if($newXsize >= $x && $newYsize >= $y){
+		if($newXsize >= $x && $newYsize >= $y) {
 			$cropX = floor(abs($x - $newXsize) * 0.5);
 			$cropY = floor(abs($y - $newYsize) * 0.5);
 
@@ -426,13 +426,13 @@ class Preview {
 			return;
 		}
 
-		if($newXsize < $x || $newYsize < $y){
-			if($newXsize > $x){
+		if($newXsize < $x || $newYsize < $y) {
+			if($newXsize > $x) {
 				$cropX = floor(($newXsize - $x) * 0.5);
 				$image->crop($cropX, 0, $x, $newYsize);
 			}
 
-			if($newYsize > $y){
+			if($newYsize > $y) {
 				$cropY = floor(($newYsize - $y) * 0.5);
 				$image->crop(0, $cropY, $newXsize, $y);
 			}
@@ -467,7 +467,7 @@ class Preview {
 	 * @param string $provider class name of a Preview_Provider
 	 * @return void
 	 */
-	public static function registerProvider($class, $options=array()){
+	public static function registerProvider($class, $options=array()) {
 		self::$registeredProviders[]=array('class'=>$class, 'options'=>$options);
 	}
 
@@ -475,7 +475,7 @@ class Preview {
 	 * @brief create instances of all the registered preview providers
 	 * @return void
 	 */
-	private static function initProviders(){
+	private static function initProviders() {
 		if(count(self::$providers)>0) {
 			return;
 		}
@@ -497,7 +497,7 @@ class Preview {
 	 * @brief method that handles preview requests from users that are logged in
 	 * @return void
 	*/
-	public static function previewRouter($params){
+	public static function previewRouter($params) {
 		\OC_Util::checkLoggedIn();
 
 		$file = '';
@@ -514,11 +514,11 @@ class Preview {
 		if(array_key_exists('y', $_GET)) $maxY = (int) $_GET['y'];
 		if(array_key_exists('scalingup', $_GET)) $scalingup = (bool) $_GET['scalingup'];
 
-		if($file !== '' && $maxX !== 0 && $maxY !== 0){
+		if($file !== '' && $maxX !== 0 && $maxY !== 0) {
 			try{
 				$preview = new Preview(\OC_User::getUser(), 'files', $file,  $maxX, $maxY, $scalingup);
 				$preview->showPreview();
-			}catch(Exception $e){
+			}catch(Exception $e) {
 				\OC_Response::setStatus(404);
 				\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
 				exit;
@@ -533,7 +533,7 @@ class Preview {
 	 * @brief method that handles preview requests from users that are not logged in / view shared folders that are public
 	 * @return void
 	*/
-	public static function publicPreviewRouter($params){
+	public static function publicPreviewRouter($params) {
 		$file = '';
 		$maxX = 0;
 		$maxY = 0;
@@ -560,21 +560,21 @@ class Preview {
 		
 		//clean up file parameter
 		$file = \OC\Files\Filesystem::normalizePath($file);
-		if(!\OC\Files\Filesystem::isValidPath($file)){
+		if(!\OC\Files\Filesystem::isValidPath($file)) {
 			\OC_Response::setStatus(403);
 			exit;
 		}
 
 		$path = \OC\Files\Filesystem::normalizePath($path, false);
-		if(substr($path, 0, 1) == '/'){
+		if(substr($path, 0, 1) == '/') {
 			$path = substr($path, 1);
 		}
 
-		if($userid !== null && $path !== null){
+		if($userid !== null && $path !== null) {
 			try{
 				$preview = new Preview($userid, 'files/' . $path, $file, $maxX, $maxY, $scalingup);
 				$preview->showPreview();
-			}catch(Exception $e){
+			}catch(Exception $e) {
 				\OC_Response::setStatus(404);
 				\OC_Log::write('core', $e->getmessage(), \OC_Log::ERROR);
 				exit;
@@ -585,13 +585,13 @@ class Preview {
 		}
 	}
 
-	public static function post_write($args){
+	public static function post_write($args) {
 		self::post_delete($args);
 	}
 	
-	public static function post_delete($args){
+	public static function post_delete($args) {
 		$path = $args['path'];
-		if(substr($path, 0, 1) == '/'){
+		if(substr($path, 0, 1) == '/') {
 			$path = substr($path, 1);
 		}
 		$preview = new Preview(\OC_User::getUser(), 'files/', $path, 0, 0, false, true);
diff --git a/lib/preview/images.php b/lib/preview/images.php
index c62fc5397e..933d65ec59 100644
--- a/lib/preview/images.php
+++ b/lib/preview/images.php
@@ -10,16 +10,16 @@ namespace OC\Preview;
 
 class Image extends Provider{
 
-	public function getMimeType(){
+	public function getMimeType() {
 		return '/image\/.*/';
 	}
 
-	public function getThumbnail($path,$maxX,$maxY,$scalingup,$fileview) {
+	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
 		//get fileinfo
 		$fileinfo = $fileview->getFileInfo($path);
 
 		//check if file is encrypted
-		if($fileinfo['encrypted'] === true){
+		if($fileinfo['encrypted'] === true) {
 			$image = new \OC_Image($fileview->fopen($path, 'r'));
 		}else{
 			$image = new \OC_Image();
diff --git a/lib/preview/movies.php b/lib/preview/movies.php
index 14ac97b552..aa97c3f43f 100644
--- a/lib/preview/movies.php
+++ b/lib/preview/movies.php
@@ -8,14 +8,14 @@
  */
 namespace OC\Preview;
 
-if(!is_null(shell_exec('ffmpeg -version'))){
+if(!is_null(shell_exec('ffmpeg -version'))) {
 	class Movie extends Provider{
 
-		public function getMimeType(){
+		public function getMimeType() {
 			return '/video\/.*/';
 		}
 
-		public function getThumbnail($path,$maxX,$maxY,$scalingup,$fileview) {
+		public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
 			//get fileinfo
 			$fileinfo = $fileview->getFileInfo($path);
 
diff --git a/lib/preview/mp3.php b/lib/preview/mp3.php
index d62c723078..cfe78f3272 100644
--- a/lib/preview/mp3.php
+++ b/lib/preview/mp3.php
@@ -11,7 +11,7 @@ require_once('getid3/getid3.php');
 
 class MP3 extends Provider{
 
-	public function getMimeType(){
+	public function getMimeType() {
 		return '/audio\/mpeg/';
 	}
 
@@ -33,7 +33,7 @@ class MP3 extends Provider{
 		return $image;
 	}
 
-	public function getNoCoverThumbnail($maxX, $maxY){
+	public function getNoCoverThumbnail($maxX, $maxY) {
 		$image = new \OC_Image();
 		return $image;
 	}
diff --git a/lib/preview/pdf.php b/lib/preview/pdf.php
index 4dd4538545..66570b05aa 100644
--- a/lib/preview/pdf.php
+++ b/lib/preview/pdf.php
@@ -7,11 +7,11 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick')){
+if (extension_loaded('imagick')) {
 
 	class PDF extends Provider{
 
-		public function getMimeType(){
+		public function getMimeType() {
 			return '/application\/pdf/';
 		}
 
diff --git a/lib/preview/provider.php b/lib/preview/provider.php
index 1e8d537adc..58e7ad7f45 100644
--- a/lib/preview/provider.php
+++ b/lib/preview/provider.php
@@ -18,5 +18,5 @@ abstract class Provider{
 	 * @param string $query
 	 * @return
 	 */
-	abstract public function getThumbnail($path, $maxX, $maxY, $scalingup,$fileview);
+	abstract public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview);
 }
diff --git a/lib/preview/svg.php b/lib/preview/svg.php
index 70be263189..746315d6e6 100644
--- a/lib/preview/svg.php
+++ b/lib/preview/svg.php
@@ -7,11 +7,11 @@
  */
 namespace OC\Preview;
 
-if (extension_loaded('imagick')){
+if (extension_loaded('imagick')) {
 
 	class SVG extends Provider{
 
-		public function getMimeType(){
+		public function getMimeType() {
 			return '/image\/svg\+xml/';
 		}
 
@@ -20,7 +20,7 @@ if (extension_loaded('imagick')){
 			$svg->setResolution($maxX, $maxY);
 
 			$content = stream_get_contents($fileview->fopen($path, 'r'));
-			if(substr($content, 0, 5) !== '<?xml'){
+			if(substr($content, 0, 5) !== '<?xml') {
 				$content = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $content;
 			}
 
diff --git a/lib/preview/txt.php b/lib/preview/txt.php
index 4004ecd3fc..5961761aaa 100644
--- a/lib/preview/txt.php
+++ b/lib/preview/txt.php
@@ -9,11 +9,11 @@ namespace OC\Preview;
 
 class TXT extends Provider{
 
-	public function getMimeType(){
+	public function getMimeType() {
 		return '/text\/.*/';
 	}
 
-	public function getThumbnail($path,$maxX,$maxY,$scalingup,$fileview) {
+	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
 		$content = $fileview->fopen($path, 'r');
 		$content = stream_get_contents($content);
 
@@ -27,7 +27,7 @@ class TXT extends Provider{
 		$imagecolor = imagecolorallocate($image, 255, 255, 255);
 		$textcolor = imagecolorallocate($image, 0, 0, 0);
 
-		foreach($lines as $index => $line){
+		foreach($lines as $index => $line) {
 			$index = $index + 1;
 
 			$x = (int) 1;
@@ -35,7 +35,7 @@ class TXT extends Provider{
 
 			imagestring($image, 1, $x, $y, $line, $textcolor);
 
-			if(($index * $linesize) >= $maxY){
+			if(($index * $linesize) >= $maxY) {
 				break;
 			}
 		}
diff --git a/lib/preview/unknown.php b/lib/preview/unknown.php
index 6a8d2fbb75..2977cd6892 100644
--- a/lib/preview/unknown.php
+++ b/lib/preview/unknown.php
@@ -10,11 +10,11 @@ namespace OC\Preview;
 
 class Unknown extends Provider{
 
-	public function getMimeType(){
+	public function getMimeType() {
 		return '/.*/';
 	}
 
-	public function getThumbnail($path, $maxX, $maxY, $scalingup,$fileview) {
+	public function getThumbnail($path, $maxX, $maxY, $scalingup, $fileview) {
 		/*$mimetype = $fileview->getMimeType($path);
 		$info = $fileview->getFileInfo($path);
 		$name = array_key_exists('name', $info) ? $info['name'] : '';