Merge remote-tracking branch 'upstream/master'

app/javascript/styles/mastodon/components.scss

@@ -1435,14 +1435,19 @@
   position: relative;
   width: 100%;
   height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
 
-  &.image-loader--loading {
-    display: flex;
-    align-content: center;
+  .image-loader__preview-canvas {
+    max-width: $media-modal-media-max-width;
+    max-height: $media-modal-media-max-height;
+    background: url('../images/void.png') repeat;
+    object-fit: contain;
+  }
 
-    .image-loader__preview-canvas {
-      filter: blur(2px);
-    }
+  &.image-loader--loading .image-loader__preview-canvas {
+    filter: blur(2px);
   }
 
   &.image-loader--amorphous .image-loader__preview-canvas {
@@ -1455,7 +1460,16 @@
   width: 100%;
   height: 100%;
   display: flex;
-  align-content: center;
+  align-items: center;
+  justify-content: center;
+
+  img {
+    max-width: $media-modal-media-max-width;
+    max-height: $media-modal-media-max-height;
+    width: auto;
+    height: auto;
+    object-fit: contain;
+  }
 }
 
 .navigation-bar {
@@ -3375,13 +3389,14 @@ a.status-card {
 }
 
 .modal-root {
+  position: relative;
   transition: opacity 0.3s linear;
   will-change: opacity;
   z-index: 9999;
 }
 
 .modal-root__overlay {
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   right: 0;
@@ -3390,7 +3405,7 @@ a.status-card {
 }
 
 .modal-root__container {
-  position: absolute;
+  position: fixed;
   top: 0;
   left: 0;
   width: 100%;
@@ -3421,27 +3436,6 @@ a.status-card {
   width: 100%;
   height: 100%;
   position: relative;
-
-  img,
-  canvas,
-  video {
-    max-width: 100%;
-    /*
-    put margins on top and bottom of image to avoid the screen coverd by
-    image.
-     */
-    max-height: 80%;
-    width: auto;
-    height: auto;
-    margin: auto;
-  }
-
-  img,
-  canvas {
-    display: block;
-    background: url('../images/void.png') repeat;
-    object-fit: contain;
-  }
 }
 
 .media-modal__closer {

app/javascript/styles/mastodon/containers.scss

@@ -60,6 +60,10 @@
   }
 }
 
+.media-gallery-standalone__body {
+  overflow: hidden;
+}
+
 .account-header {
   width: 400px;
   margin: 0 auto;

app/javascript/styles/mastodon/variables.scss

@@ -30,3 +30,8 @@ $ui-highlight-color: $classic-highlight-color !default;        // Vibrant
 
 // Language codes that uses CJK fonts
 $cjk-langs: ja, ko, zh-CN, zh-HK, zh-TW;
+
+// Variables for components
+$media-modal-media-max-width: 100%;
+// put margins on top and bottom of image to avoid the screen covered by image.
+$media-modal-media-max-height: 80%;