From b9dfc1674cb9f690ebbcd351c397480b1eb38674 Mon Sep 17 00:00:00 2001
From: Robin Appelman <robin@icewind.nl>
Date: Tue, 26 Jul 2016 13:51:18 +0200
Subject: [PATCH] only load sidebar previews when we know it's available

---
 apps/files/js/filelist.js              |  6 ++++--
 apps/files/js/sidebarpreviewmanager.js | 15 ++++++++++++---
 2 files changed, 16 insertions(+), 5 deletions(-)

diff --git a/apps/files/js/filelist.js b/apps/files/js/filelist.js
index 3b55f842a09..24aa718872b 100644
--- a/apps/files/js/filelist.js
+++ b/apps/files/js/filelist.js
@@ -852,7 +852,8 @@
 				type: $el.attr('data-type'),
 				size: parseInt($el.attr('data-size'), 10),
 				etag: $el.attr('data-etag'),
-				permissions: parseInt($el.attr('data-permissions'), 10)
+				permissions: parseInt($el.attr('data-permissions'), 10),
+				hasPreview: $el.attr('data-has-preview') === 'true'
 			};
 			var icon = $el.attr('data-icon');
 			if (icon) {
@@ -1068,7 +1069,8 @@
 				"data-mime": mime,
 				"data-mtime": mtime,
 				"data-etag": fileData.etag,
-				"data-permissions": fileData.permissions || this.getDirectoryPermissions()
+				"data-permissions": fileData.permissions || this.getDirectoryPermissions(),
+				"data-has-preview": fileData.hasPreview !== false
 			});
 
 			if (dataIcon) {
diff --git a/apps/files/js/sidebarpreviewmanager.js b/apps/files/js/sidebarpreviewmanager.js
index cfd1fffae13..3d540119189 100644
--- a/apps/files/js/sidebarpreviewmanager.js
+++ b/apps/files/js/sidebarpreviewmanager.js
@@ -32,9 +32,18 @@
 		},
 
 		loadPreview: function (model, $thumbnailDiv, $thumbnailContainer) {
-			var handler = this.getPreviewHandler(model.get('mimetype'));
-			var fallback = this.fallbackPreview.bind(this, model, $thumbnailDiv, $thumbnailContainer);
-			handler(model, $thumbnailDiv, $thumbnailContainer, fallback);
+			if (model.get('hasPreview') === false) {
+				var mimeIcon = OC.MimeType.getIconUrl(model.get('mimetype'));
+				$thumbnailDiv.removeClass('icon-loading icon-32');
+				$thumbnailContainer.removeClass('image'); //fall back to regular view
+				$thumbnailDiv.css({
+					'background-image': 'url("' + mimeIcon + '")'
+				});
+			} else {
+				var handler = this.getPreviewHandler(model.get('mimetype'));
+				var fallback = this.fallbackPreview.bind(this, model, $thumbnailDiv, $thumbnailContainer);
+				handler(model, $thumbnailDiv, $thumbnailContainer, fallback);
+			}
 		},
 
 		// previews for images and mimetype icons
-- 
2.39.5