Add video volume control to video player

lms/static/coffee/spec/helper.coffee

@@ -30,7 +30,8 @@ jasmine.stubRequests = ->
 
 jasmine.stubYoutubePlayer = ->
   YT.Player = -> jasmine.createSpyObj 'YT.Player', ['cueVideoById', 'getVideoEmbedCode',
-    'getCurrentTime', 'getPlayerState', 'loadVideoById', 'playVideo', 'pauseVideo', 'seekTo']
+    'getCurrentTime', 'getPlayerState', 'getVolume', 'setVolume', 'loadVideoById',
+    'playVideo', 'pauseVideo', 'seekTo']
 
 jasmine.stubVideoPlayer = (context, enableParts) ->
   enableParts = [enableParts] unless $.isArray(enableParts)

lms/static/coffee/spec/modules/video/video_player_spec.coffee

@@ -387,3 +387,17 @@ describe 'VideoPlayer', ->
 
     it 'delegate to the video', ->
       expect(@player.currentSpeed()).toEqual '3.0'
+
+  describe 'volume', ->
+    beforeEach ->
+      @player = new VideoPlayer @video
+      @player.player.getVolume.andReturn 42
+
+    describe 'without value', ->
+      it 'return current volume', ->
+        expect(@player.volume()).toEqual 42
+
+    describe 'with value', ->
+      it 'set player volume', ->
+        @player.volume(60)
+        expect(@player.player.setVolume).toHaveBeenCalledWith(60)

lms/static/coffee/spec/modules/video/video_speed_control_spec.coffee

@@ -3,8 +3,6 @@ describe 'VideoSpeedControl', ->
     @player = jasmine.stubVideoPlayer @
     $('.speeds').remove()
 
-  afterEach ->
-
   describe 'constructor', ->
     describe 'always', ->
       beforeEach ->

lms/static/coffee/spec/modules/video/video_volume_control_spec.coffee

@@ -0,0 +1,102 @@
+describe 'VideoVolumeControl', ->
+  beforeEach ->
+    @player = jasmine.stubVideoPlayer @
+    $('.volume').remove()
+
+  describe 'constructor', ->
+    beforeEach ->
+      spyOn($.fn, 'slider')
+      @volumeControl = new VideoVolumeControl @player
+
+    it 'initialize previousVolume to 100', ->
+      expect(@volumeControl.previousVolume).toEqual 100
+
+    it 'render the volume control', ->
+      expect($('.secondary-controls').html()).toContain """
+        <div class="volume">
+          <a href="#"></a>
+          <div class="volume-slider-container">
+            <div class="volume-slider"></div>
+          </div>
+        </div>
+      """
+
+    it 'create the slider', ->
+      expect($.fn.slider).toHaveBeenCalledWith
+        orientation: "vertical"
+        range: "min"
+        min: 0
+        max: 100
+        value: 100
+        change: @volumeControl.onChange
+        slide: @volumeControl.onChange
+
+    it 'bind the volume control', ->
+      expect($(@player)).toHandleWith 'ready', @volumeControl.onReady
+      expect($('.volume>a')).toHandleWith 'click', @volumeControl.toggleMute
+
+      expect($('.volume')).not.toHaveClass 'open'
+      $('.volume').mouseenter()
+      expect($('.volume')).toHaveClass 'open'
+      $('.volume').mouseleave()
+      expect($('.volume')).not.toHaveClass 'open'
+
+  describe 'onReady', ->
+    beforeEach ->
+      @volumeControl = new VideoVolumeControl @player
+      spyOn $.fn, 'slider'
+      spyOn(@player, 'volume').andReturn 60
+      @volumeControl.onReady()
+
+    it 'set the max value of the slider', ->
+      expect($.fn.slider).toHaveBeenCalledWith 'option', 'max', 60
+
+  describe 'onChange', ->
+    beforeEach ->
+      spyOn @player, 'volume'
+      @volumeControl = new VideoVolumeControl @player
+
+    describe 'when the new volume is more than 0', ->
+      beforeEach ->
+        @volumeControl.onChange undefined, value: 60
+
+      it 'set the player volume', ->
+        expect(@player.volume).toHaveBeenCalledWith 60
+
+      it 'remote muted class', ->
+        expect($('.volume')).not.toHaveClass 'muted'
+
+    describe 'when the new volume is 0', ->
+      beforeEach ->
+        @volumeControl.onChange undefined, value: 0
+
+      it 'set the player volume', ->
+        expect(@player.volume).toHaveBeenCalledWith 0
+
+      it 'add muted class', ->
+        expect($('.volume')).toHaveClass 'muted'
+
+  describe 'toggleMute', ->
+    beforeEach ->
+      spyOn @player, 'volume'
+      @volumeControl = new VideoVolumeControl @player
+
+    describe 'when the current volume is more than 0', ->
+      beforeEach ->
+        @player.volume.andReturn 60
+        @volumeControl.toggleMute()
+
+      it 'save the previous volume', ->
+        expect(@volumeControl.previousVolume).toEqual 60
+
+      it 'set the player volume', ->
+        expect(@player.volume).toHaveBeenCalledWith 0
+
+    describe 'when the current volume is 0', ->
+      beforeEach ->
+        @player.volume.andReturn 0
+        @volumeControl.previousVolume = 60
+        @volumeControl.toggleMute()
+
+      it 'set the player volume to previous volume', ->
+        expect(@player.volume).toHaveBeenCalledWith 60

lms/static/coffee/src/modules/video/video_player.coffee

@@ -30,6 +30,7 @@ class @VideoPlayer
   render: ->
     new VideoControl @
     new VideoCaption @, @video.youtubeId('1.0')
+    new VideoVolumeControl @
     new VideoSpeedControl @, @video.speeds
     new VideoProgressSlider @
     @player = new YT.Player @video.id,
@@ -132,3 +133,9 @@ class @VideoPlayer
 
   currentSpeed: ->
     @video.speed
+
+  volume: (value) ->
+    if value != undefined
+      @player.setVolume value
+    else
+      @player.getVolume()

lms/static/coffee/src/modules/video/video_volume_control.coffee

@@ -0,0 +1,48 @@
+class @VideoVolumeControl
+  constructor: (@player) ->
+    @previousVolume = 100
+    @render()
+    @bind()
+
+  $: (selector) ->
+    @player.$(selector)
+
+  bind: ->
+    $(@player).bind('ready', @onReady)
+    @$('.volume').mouseenter ->
+      $(this).addClass('open')
+    @$('.volume').mouseleave ->
+      $(this).removeClass('open')
+    @$('.volume>a').click(@toggleMute)
+
+  render: ->
+    @$('.secondary-controls').prepend """
+      <div class="volume">
+        <a href="#"></a>
+        <div class="volume-slider-container">
+          <div class="volume-slider"></div>
+        </div>
+      </div>
+      """
+    @slider = @$('.volume-slider').slider
+      orientation: "vertical"
+      range: "min"
+      min: 0
+      max: 100
+      value: 100
+      change: @onChange
+      slide: @onChange
+
+  onReady: =>
+    @slider.slider 'option', 'max', @player.volume()
+
+  onChange: (event, ui) =>
+    @player.volume ui.value
+    @$('.secondary-controls .volume').toggleClass 'muted', ui.value == 0
+
+  toggleMute: =>
+    if @player.volume() > 0
+      @previousVolume = @player.volume()
+      @slider.slider 'option', 'value', 0
+    else
+      @slider.slider 'option', 'value', @previousVolume

lms/static/sass_old/courseware/_video.scss

@@ -286,6 +286,86 @@ section.course-content {
             }
           }
 
+          div.volume {
+            float: left;
+            position: relative;
+
+            &.open {
+              .volume-slider-container {
+                display: block;
+                opacity: 1;
+              }
+            }
+
+            &.muted {
+              &>a {
+                // TODO: Replace this with muted speaker icon
+                background: url('../images/closed-arrow.png') 10px center no-repeat;
+              }
+            }
+
+            &>a {
+              // TODO: Replace this with speaker icon
+              background: url('../images/open-arrow.png') 10px center no-repeat;
+              border-right: 1px solid #000;
+              @include box-shadow(1px 0 0 #555, inset 1px 0 0 #555);
+              @include clearfix();
+              color: #fff;
+              cursor: pointer;
+              display: block;
+              height: 46px;
+              margin-right: 0;
+              padding-left: 15px;
+              position: relative;
+              @include transition();
+              -webkit-font-smoothing: antialiased;
+              width: 30px;
+
+              &:hover, &:active, &:focus {
+                background-color: #444;
+              }
+            }
+
+            .volume-slider-container {
+              @include box-shadow(inset 1px 0 0 #555, 0 3px 0 #444);
+              @include transition();
+              background-color: #444;
+              border: 1px solid #000;
+              bottom: 46px;
+              display: none;
+              opacity: 0;
+              position: absolute;
+              width: 35px;
+              height: 125px;
+              margin-left: 5px;
+              z-index: 10;
+
+              .volume-slider {
+                height: 100px;
+                border: 0;
+                width: 5px;
+                margin: 14px auto;
+
+                a.ui-slider-handle {
+                  background: $mit-red url(../images/slider-handle.png) center center no-repeat;
+                  @include background-size(50%);
+                  border: 1px solid darken($mit-red, 20%);
+                  @include border-radius(15px);
+                  @include box-shadow(inset 0 1px 0 lighten($mit-red, 10%));
+                  cursor: pointer;
+                  height: 15px;
+                  left: -6px;
+                  @include transition(height 2.0s ease-in-out, width 2.0s ease-in-out);
+                  width: 15px;
+                }
+
+                .ui-slider-range {
+                  background: #666;
+                }
+              }
+            }
+          }
+
           a.add-fullscreen {
             background: url(../images/fullscreen.png) center no-repeat;
             border-right: 1px solid #000;