From e3790f0275da7e228265cf8d2e7b502c118b5407 Mon Sep 17 00:00:00 2001
From: phisch <git@philippschaffrath.de>
Date: Thu, 24 Nov 2016 09:40:06 +0100
Subject: [PATCH 1/2] don't try to render preview images if 'enable_previews'
 has been set to false

---
 apps/files/js/filelist.js | 71 +++++++++++++++++++++------------------
 core/js/config.php        |  3 +-
 2 files changed, 40 insertions(+), 34 deletions(-)

diff --git a/apps/files/js/filelist.js b/apps/files/js/filelist.js
index 70bdcfec2422..ad6c24554f27 100644
--- a/apps/files/js/filelist.js
+++ b/apps/files/js/filelist.js
@@ -1734,44 +1734,49 @@
 				urlSpec = {};
 			ready(iconURL); // set mimeicon URL
 
-			urlSpec.file = OCA.Files.Files.fixPath(path);
-			if (options.x) {
-				urlSpec.x = options.x;
-			}
-			if (options.y) {
-				urlSpec.y = options.y;
-			}
-			if (options.a) {
-				urlSpec.a = options.a;
-			}
-			if (options.mode) {
-				urlSpec.mode = options.mode;
-			}
+			var img = new Image();
 
-			if (etag){
-				// use etag as cache buster
-				urlSpec.c = etag;
-			}
+			if (oc_appconfig.core.previewsEnabled) {
+				urlSpec.file = OCA.Files.Files.fixPath(path);
+				if (options.x) {
+					urlSpec.x = options.x;
+				}
+				if (options.y) {
+					urlSpec.y = options.y;
+				}
+				if (options.a) {
+					urlSpec.a = options.a;
+				}
+				if (options.mode) {
+					urlSpec.mode = options.mode;
+				}
 
-			previewURL = self.generatePreviewUrl(urlSpec);
-			previewURL = previewURL.replace('(', '%28');
-			previewURL = previewURL.replace(')', '%29');
+				if (etag) {
+					// use etag as cache buster
+					urlSpec.c = etag;
+				}
 
-			// preload image to prevent delay
-			// this will make the browser cache the image
-			var img = new Image();
-			img.onload = function(){
-				// if loading the preview image failed (no preview for the mimetype) then img.width will < 5
-				if (img.width > 5) {
-					ready(previewURL, img);
-				} else if (options.error) {
-					options.error();
+				previewURL = self.generatePreviewUrl(urlSpec);
+				previewURL = previewURL.replace('(', '%28');
+				previewURL = previewURL.replace(')', '%29');
+
+				// preload image to prevent delay
+				// this will make the browser cache the image
+				img.onload = function () {
+					// if loading the preview image failed (no preview for the mimetype) then img.width will < 5
+					if (img.width > 5) {
+						ready(previewURL, img);
+					} else if (options.error) {
+						options.error();
+					}
+				};
+				if (options.error) {
+					img.onerror = options.error;
 				}
-			};
-			if (options.error) {
-				img.onerror = options.error;
+				img.src = previewURL;
+			} else {
+				ready(iconURL, img);
 			}
-			img.src = previewURL;
 		},
 
 		/**
diff --git a/core/js/config.php b/core/js/config.php
index 0afe8e98336e..6430796cbcea 100644
--- a/core/js/config.php
+++ b/core/js/config.php
@@ -167,7 +167,8 @@
 				'resharingAllowed' => \OCP\Share::isResharingAllowed(),
 				'remoteShareAllowed' => $outgoingServer2serverShareEnabled,
 				'federatedCloudShareDoc' => \OC::$server->getURLGenerator()->linkToDocs('user-sharing-federated'),
-				'allowGroupSharing' => \OC::$server->getShareManager()->allowGroupSharing()
+				'allowGroupSharing' => \OC::$server->getShareManager()->allowGroupSharing(),
+                'previewsEnabled' => \OC::$server->getConfig()->getSystemValue('enable_previews', true) === true,
 			]
 			]
 	),

From 0b64e00571cb66fcd0ab9b7709ff3a709271237f Mon Sep 17 00:00:00 2001
From: phisch <git@philippschaffrath.de>
Date: Thu, 24 Nov 2016 10:56:17 +0100
Subject: [PATCH 2/2] proper indentation

---
 core/js/config.php | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/core/js/config.php b/core/js/config.php
index 6430796cbcea..7ebd84d1fd2d 100644
--- a/core/js/config.php
+++ b/core/js/config.php
@@ -157,7 +157,8 @@
 		]
 	),
 	"oc_appconfig" => json_encode(
-			["core" => [
+		[
+			"core" => [
 				'defaultExpireDateEnabled' => $defaultExpireDateEnabled,
 				'defaultExpireDate' => $defaultExpireDate,
 				'defaultExpireDateEnforced' => $enforceDefaultExpireDate,
@@ -168,9 +169,9 @@
 				'remoteShareAllowed' => $outgoingServer2serverShareEnabled,
 				'federatedCloudShareDoc' => \OC::$server->getURLGenerator()->linkToDocs('user-sharing-federated'),
 				'allowGroupSharing' => \OC::$server->getShareManager()->allowGroupSharing(),
-                'previewsEnabled' => \OC::$server->getConfig()->getSystemValue('enable_previews', true) === true,
-			]
+				'previewsEnabled' => \OC::$server->getConfig()->getSystemValue('enable_previews', true) === true,
 			]
+		]
 	),
 	"oc_defaults" => json_encode(
 		[