Volume sliders for videos #7429 (#9366)

* Volume sliders for videos #7429

* Code formatting updates

* Code formatting updates

2 files changed, 122 insertions, 5 deletions

diff --git a/app/javascript/mastodon/features/video/index.js b/app/javascript/mastodon/features/video/index.js
index 67f7580b9..3650fddb6 100644
--- a/app/javascript/mastodon/features/video/index.js
+++ b/app/javascript/mastodon/features/video/index.js
@@ -105,6 +105,7 @@ class Video extends React.PureComponent {
   state = {
     currentTime: 0,
     duration: 0,
+    volume: 0.5,
     paused: true,
     dragging: false,
     containerWidth: false,
@@ -114,6 +115,15 @@ class Video extends React.PureComponent {
     revealed: displayMedia !== 'hide_all' && !this.props.sensitive || displayMedia === 'show_all',
   };
 
+  // hard coded in components.scss
+  // any way to get ::before values programatically?
+  volWidth = 50;
+  volOffset = 70;
+  volHandleOffset = v => {
+    const offset = v * this.volWidth + this.volOffset;
+    return (offset > 110) ? 110 : offset;
+  }
+
   setPlayerRef = c => {
     this.player = c;
 
@@ -132,6 +142,10 @@ class Video extends React.PureComponent {
     this.seek = c;
   }
 
+  setVolumeRef = c => {
+    this.volume = c;
+  }
+
   handleClickRoot = e => e.stopPropagation();
 
   handlePlay = () => {
@@ -149,6 +163,43 @@ class Video extends React.PureComponent {
     });
   }
 
+  handleVolumeMouseDown = e => {
+
+    document.addEventListener('mousemove', this.handleMouseVolSlide, true);
+    document.addEventListener('mouseup', this.handleVolumeMouseUp, true);
+    document.addEventListener('touchmove', this.handleMouseVolSlide, true);
+    document.addEventListener('touchend', this.handleVolumeMouseUp, true);
+
+    this.handleMouseVolSlide(e);
+
+    e.preventDefault();
+    e.stopPropagation();
+  }
+
+  handleVolumeMouseUp = () => {
+    document.removeEventListener('mousemove', this.handleMouseVolSlide, true);
+    document.removeEventListener('mouseup', this.handleVolumeMouseUp, true);
+    document.removeEventListener('touchmove', this.handleMouseVolSlide, true);
+    document.removeEventListener('touchend', this.handleVolumeMouseUp, true);
+  }
+
+  handleMouseVolSlide = throttle(e => {
+
+    const rect = this.volume.getBoundingClientRect();
+    const x = (e.clientX - rect.left) / this.volWidth; //x position within the element.
+
+    if(!isNaN(x)) {
+      var slideamt = x;
+      if(x > 1) {
+        slideamt = 1;
+      } else if(x < 0) {
+        slideamt = 0;
+      }
+      this.video.volume = slideamt;
+      this.setState({ volume: slideamt });
+    }
+  }, 60);
+
   handleMouseDown = e => {
     document.addEventListener('mousemove', this.handleMouseMove, true);
     document.addEventListener('mouseup', this.handleMouseUp, true);
@@ -273,8 +324,11 @@ class Video extends React.PureComponent {
 
   render () {
     const { preview, src, inline, startTime, onOpenVideo, onCloseVideo, intl, alt, detailed, sensitive } = this.props;
-    const { containerWidth, currentTime, duration, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
+    const { containerWidth, currentTime, duration, volume, buffer, dragging, paused, fullscreen, hovered, muted, revealed } = this.state;
     const progress = (currentTime / duration) * 100;
+
+    const volumeWidth = (muted) ? 0 : volume * this.volWidth;
+    const volumeHandleLoc = (muted) ? this.volHandleOffset(0) : this.volHandleOffset(volume);
     const playerStyle = {};
 
     let { width, height } = this.props;
@@ -326,6 +380,7 @@ class Video extends React.PureComponent {
           title={alt}
           width={width}
           height={height}
+          volume={volume}
           onClick={this.togglePlay}
           onPlay={this.handlePlay}
           onPause={this.handlePause}
@@ -354,9 +409,15 @@ class Video extends React.PureComponent {
           <div className='video-player__buttons-bar'>
             <div className='video-player__buttons left'>
               <button type='button' aria-label={intl.formatMessage(paused ? messages.play : messages.pause)} onClick={this.togglePlay}><i className={classNames('fa fa-fw', { 'fa-play': paused, 'fa-pause': !paused })} /></button>
-              <button type='button' aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} onClick={this.toggleMute}><i className={classNames('fa fa-fw', { 'fa-volume-off': muted, 'fa-volume-up': !muted })} /></button>
-
-              {!onCloseVideo && <button type='button' aria-label={intl.formatMessage(messages.hide)} onClick={this.toggleReveal}><i className='fa fa-fw fa-eye' /></button>}
+              <button type='button' aria-label={intl.formatMessage(muted ? messages.unmute : messages.mute)} onMouseEnter={this.volumeSlider} onMouseLeave={this.volumeSlider} onClick={this.toggleMute}><i className={classNames('fa fa-fw', { 'fa-volume-off': muted, 'fa-volume-up': !muted })} /></button>
+              <div className='video-player__volume' onMouseDown={this.handleVolumeMouseDown} ref={this.setVolumeRef}>
+                <div className='video-player__volume__current' style={{ width: `${volumeWidth}px` }} />
+                <span
+                  className={classNames('video-player__volume__handle')}
+                  tabIndex='0'
+                  style={{ left: `${volumeHandleLoc}px` }}
+                />
+              </div>
 
               {(detailed || fullscreen) &&
                 <span>
@@ -368,6 +429,7 @@ class Video extends React.PureComponent {
             </div>
 
             <div className='video-player__buttons right'>
+              {!onCloseVideo && <button type='button' aria-label={intl.formatMessage(messages.hide)} onClick={this.toggleReveal}><i className='fa fa-fw fa-eye' /></button>}
               {(!fullscreen && onOpenVideo) && <button type='button' aria-label={intl.formatMessage(messages.expand)} onClick={this.handleOpenVideo}><i className='fa fa-fw fa-expand' /></button>}
               {onCloseVideo && <button type='button' aria-label={intl.formatMessage(messages.close)} onClick={this.handleCloseVideo}><i className='fa fa-fw fa-compress' /></button>}
               <button type='button' aria-label={intl.formatMessage(fullscreen ? messages.exit_fullscreen : messages.fullscreen)} onClick={this.toggleFullscreen}><i className={classNames('fa fa-fw', { 'fa-arrows-alt': !fullscreen, 'fa-compress': fullscreen })} /></button>
diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index a636d18c4..5765829a4 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -4658,6 +4658,19 @@ a.status-card.compact:hover {
   z-index: 5;
 }
 
+.detailed,
+.fullscreen {
+  .video-player__volume__current,
+  .video-player__volume::before {
+    bottom: 27px;
+  }
+
+  .video-player__volume__handle {
+    bottom: 23px;
+  }
+
+}
+
 .video-player {
   overflow: hidden;
   position: relative;
@@ -4806,7 +4819,7 @@ a.status-card.compact:hover {
 
   &__time-current {
     color: $white;
-    margin-left: 10px;
+    margin-left: 60px;
   }
 
   &__time-sep {
@@ -4819,6 +4832,48 @@ a.status-card.compact:hover {
     color: $white;
   }
 
+  &__volume {
+    cursor: pointer;
+    height: 24px;
+    display: inline;
+
+    &::before {
+      content: "";
+      width: 50px;
+      background: rgba($white, 0.35);
+      border-radius: 4px;
+      display: block;
+      position: absolute;
+      height: 4px;
+      left: 70px;
+      bottom: 20px;
+    }
+
+    &__current {
+      display: block;
+      position: absolute;
+      height: 4px;
+      border-radius: 4px;
+      left: 70px;
+      bottom: 20px;
+      background: lighten($ui-highlight-color, 8%);
+    }
+
+    &__handle {
+      position: absolute;
+      z-index: 3;
+      border-radius: 50%;
+      width: 12px;
+      height: 12px;
+      bottom: 16px;
+      left: 70px;
+      transition: opacity .1s ease;
+      background: lighten($ui-highlight-color, 8%);
+      box-shadow: 1px 2px 6px rgba($base-shadow-color, 0.2);
+      pointer-events: none;
+    }
+  }
+
   &__seek {
     cursor: pointer;
     height: 24px;