Added hard-coded flag to video.html that turns on/off autohiding of captions.

Front-end functionality was not removed. When flag is set to "True", old
behaviour of autohiding of controls and captions will be enabled.

common/lib/xmodule/xmodule/js/src/video/01_initialize.js

@@ -295,6 +295,11 @@ function (VideoPlayer) {
                                 ),
             youtubeStreams:     this.el.data('streams'),
 
+            autohideHtml5:      (
+                                    this.el.data('autohide-html5')
+                                        .toString().toLowerCase() === 'true'
+                                ),
+
             sub:                this.el.data('sub'),
             mp4Source:          this.el.data('mp4-source'),
             webmSource:         this.el.data('webm-source'),
@@ -307,6 +312,8 @@ function (VideoPlayer) {
             availableQualities: ['hd720', 'hd1080', 'highres']
         };
 
+        console.log('this.config.autohideHtml5 = ' + this.config.autohideHtml5);
+
         // Check if the YT test timeout has been set. If not, or it is in
         // improper format, then set to default value.
         tempYtTestTimeout = parseInt(this.el.data('yt-test-timeout'), 10);

common/lib/xmodule/xmodule/js/src/video/04_video_control.js

@@ -57,7 +57,7 @@ function () {
             state.videoControl.play();
         }
 
-        if (state.videoType === 'html5') {
+        if ((state.videoType === 'html5') && (state.config.autohideHtml5)) {
             state.videoControl.fadeOutTimeout = state.config.fadeOutTimeout;
 
             state.videoControl.el.addClass('html5');
@@ -81,7 +81,7 @@ function () {
         state.videoControl.fullScreenEl.on('click', state.videoControl.toggleFullScreen);
         $(document).on('keyup', state.videoControl.exitFullScreen);
 
-        if (state.videoType === 'html5') {
+        if ((state.videoType === 'html5') && (state.config.autohideHtml5)) {
             state.el.on('mousemove', state.videoControl.showControls);
             state.el.on('keydown', state.videoControl.showControls);
         }

common/lib/xmodule/xmodule/js/src/video/09_video_caption.js

@@ -152,7 +152,7 @@ function () {
                 this.videoCaption.onMovement
             );
 
-        if (this.videoType === 'html5') {
+        if ((this.videoType === 'html5') && (this.config.autohideHtml5)) {
             this.el.on('mousemove', this.videoCaption.autoShowCaptions);
             this.el.on('keydown', this.videoCaption.autoShowCaptions);
 
@@ -335,7 +335,7 @@ function () {
 
         this.videoCaption.setSubtitlesHeight();
 
-        if (this.videoType === 'html5') {
+        if ((this.videoType === 'html5') && (this.config.autohideHtml5)) {
             this.videoCaption.fadeOutTimeout = this.config.fadeOutTimeout;
 
             this.videoCaption.subtitlesEl.addClass('html5');
@@ -698,7 +698,7 @@ function () {
 
     function setSubtitlesHeight() {
         var height = 0;
-        if (this.videoType === 'html5'){
+        if ((this.videoType === 'html5') && (this.config.autohideHtml5)) {
             // on page load captionHidden = undefined
             if  (
                 (

lms/templates/video.html

@@ -26,6 +26,19 @@
     data-yt-test-timeout="${yt_test_timeout}"
     data-yt-test-url="${yt_test_url}"
 
+    ## For now, the option "data-autohide-html5" is hard coded. This option
+    ## either enables or disables autohiding of controls and captions on mouse
+    ## inactivity. If set to true, controls and captions will autohide for
+    ## HTML5 sources (non-YouTube) after a period of mouse inactivity over the
+    ## whole video. When the mouse moves (or a key is pressed while any part of
+    ## the video player is focused), the captions and controls will be shown
+    ## once again.
+    ##
+    ## There is no option in the "Advanced Editor" to set this option. However,
+    ## this option will have an effect if changed to "True". The code on
+    ## front-end exists.
+    data-autohide-html5="False"
+
     tabindex="-1"
 >
     <div class="focus_grabber first"></div>