Responsively enforce 16:9 ratio on all media thumbnails in web UI (#6590)

* Responsively enforce 16:9 ratio on all media thumbnails in web UI

Also change video player behaviour to "contain" rather than
"cover" videos that don't fit the ratio, unlike images and GIFs,
it's expected that a video is shown fully.

* Fix spacing issues and remove floor

* Remove floor

1 files changed, 22 insertions, 3 deletions

diff --git a/app/javascript/mastodon/features/video/index.js b/app/javascript/mastodon/features/video/index.js
index c81a5cb5f..98ebcb6f9 100644
--- a/app/javascript/mastodon/features/video/index.js
+++ b/app/javascript/mastodon/features/video/index.js
@@ -97,6 +97,7 @@ export default class Video extends React.PureComponent {
     onOpenVideo: PropTypes.func,
     onCloseVideo: PropTypes.func,
     detailed: PropTypes.bool,
+    inline: PropTypes.bool,
     intl: PropTypes.object.isRequired,
   };
 
@@ -105,6 +106,7 @@ export default class Video extends React.PureComponent {
     duration: 0,
     paused: true,
     dragging: false,
+    containerWidth: false,
     fullscreen: false,
     hovered: false,
     muted: false,
@@ -113,6 +115,12 @@ export default class Video extends React.PureComponent {
 
   setPlayerRef = c => {
     this.player = c;
+
+    if (c) {
+      this.setState({
+        containerWidth: c.offsetWidth,
+      });
+    }
   }
 
   setVideoRef = c => {
@@ -246,12 +254,23 @@ export default class Video extends React.PureComponent {
   }
 
   render () {
-    const { preview, src, width, height, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed } = this.props;
-    const { currentTime, duration, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
+    const { preview, src, inline, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed } = this.props;
+    const { containerWidth, currentTime, duration, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
     const progress = (currentTime / duration) * 100;
+    const playerStyle = {};
+
+    let { width, height } = this.props;
+
+    if (inline && containerWidth) {
+      width  = containerWidth;
+      height = containerWidth / (16/9);
+
+      playerStyle.width  = width;
+      playerStyle.height = height;
+    }
 
     return (
-      <div className={classNames('video-player', { inactive: !revealed, detailed, inline: width && height && !fullscreen, fullscreen })} style={{ width, height }} ref={this.setPlayerRef} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
+      <div className={classNames('video-player', { inactive: !revealed, detailed, inline: inline && !fullscreen, fullscreen })} style={playerStyle} ref={this.setPlayerRef} onMouseEnter={this.handleMouseEnter} onMouseLeave={this.handleMouseLeave}>
         <video
           ref={this.setVideoRef}
           src={src}