[Glitch] Add hotkeys for audio/video control

Port 04a079e7230bc4e73b897e3c4462011cddf36474 to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

1 files changed, 78 insertions, 0 deletions

diff --git a/app/javascript/flavours/glitch/features/video/index.js b/app/javascript/flavours/glitch/features/video/index.js
index 870812856..21a2594e7 100644
--- a/app/javascript/flavours/glitch/features/video/index.js
+++ b/app/javascript/flavours/glitch/features/video/index.js
@@ -279,6 +279,81 @@ class Video extends React.PureComponent {
     }
   }, 15);
 
+  seekBy (time) {
+    const currentTime = this.video.currentTime + time;
+
+    if (!isNaN(currentTime)) {
+      this.setState({ currentTime }, () => {
+        this.video.currentTime = currentTime;
+      });
+    }
+  }
+
+  handleVideoKeyDown = e => {
+    // On the video element or the seek bar, we can safely use the space bar
+    // for playback control because there are no buttons to press
+
+    if (e.key === ' ') {
+      e.preventDefault();
+      e.stopPropagation();
+      this.togglePlay();
+    }
+  }
+
+  handleKeyDown = e => {
+    const frameTime = 1 / 25;
+
+    switch(e.key) {
+    case 'k':
+      e.preventDefault();
+      e.stopPropagation();
+      this.togglePlay();
+      break;
+    case 'm':
+      e.preventDefault();
+      e.stopPropagation();
+      this.toggleMute();
+      break;
+    case 'f':
+      e.preventDefault();
+      e.stopPropagation();
+      this.toggleFullscreen();
+      break;
+    case 'j':
+      e.preventDefault();
+      e.stopPropagation();
+      this.seekBy(-10);
+      break;
+    case 'l':
+      e.preventDefault();
+      e.stopPropagation();
+      this.seekBy(10);
+      break;
+    case ',':
+      e.preventDefault();
+      e.stopPropagation();
+      this.seekBy(-frameTime);
+      break;
+    case '.':
+      e.preventDefault();
+      e.stopPropagation();
+      this.seekBy(frameTime);
+      break;
+    }
+
+    // If we are in fullscreen mode, we don't want any hotkeys
+    // interacting with the UI that's not visible
+
+    if (this.state.fullscreen) {
+      e.preventDefault();
+      e.stopPropagation();
+
+      if (e.key === 'Escape') {
+        exitFullscreen();
+      }
+    }
+  }
+
   togglePlay = () => {
     if (this.state.paused) {
       this.setState({ paused: false }, () => this.video.play());
@@ -504,6 +579,7 @@ class Video extends React.PureComponent {
         onMouseEnter={this.handleMouseEnter}
         onMouseLeave={this.handleMouseLeave}
         onMouseDown={this.handleMouseDownRoot}
+        onKeyDown={this.handleKeyDown}
         tabIndex={0}
       >
         <Blurhash
@@ -528,6 +604,7 @@ class Video extends React.PureComponent {
           height={height}
           volume={volume}
           onClick={this.togglePlay}
+          onKeyDown={this.handleVideoKeyDown}
           onPlay={this.handlePlay}
           onPause={this.handlePause}
           onLoadedData={this.handleLoadedData}
@@ -550,6 +627,7 @@ class Video extends React.PureComponent {
               className={classNames('video-player__seek__handle', { active: dragging })}
               tabIndex='0'
               style={{ left: `${progress}%` }}
+              onKeyDown={this.handleVideoKeyDown}
             />
           </div>