From b170627ceb8838c358aef1fcca9673ce4aa61ab8 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Wed, 7 Mar 2018 12:02:05 +0100
Subject: [PATCH] Fix cover behaviour of thumbnails that are wider than taller
 (#6678)

---
 app/javascript/mastodon/components/media_gallery.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/app/javascript/mastodon/components/media_gallery.js b/app/javascript/mastodon/components/media_gallery.js
index 3568a844077..71436500af0 100644
--- a/app/javascript/mastodon/components/media_gallery.js
+++ b/app/javascript/mastodon/components/media_gallery.js
@@ -167,6 +167,14 @@ class Item extends React.PureComponent {
           vShift = shiftToPoint(widthRatio, (containerHeight * (height / 100)), originalHeight, focusY, true);
         }
 
+        if (originalWidth > originalHeight) {
+          imageStyle.height = '100%';
+          imageStyle.width  = 'auto';
+        } else {
+          imageStyle.height = 'auto';
+          imageStyle.width  = '100%';
+        }
+
         imageStyle.top  = vShift;
         imageStyle.left = hShift;
       } else {