fix(picture-in-picture-control): hide the component in non-compatible…

… browsers (#7899)

src/js/control-bar/control-bar.js

@@ -2,7 +2,6 @@
  * @file control-bar.js
  */
 import Component from '../component.js';
-import document from 'global/document';
 
 // Required children
 import './play-toggle.js';
@@ -73,17 +72,10 @@ ControlBar.prototype.options_ = {
     'descriptionsButton',
     'subsCapsButton',
     'audioTrackButton',
+    'pictureInPictureToggle',
     'fullscreenToggle'
   ]
 };
 
-if ('exitPictureInPicture' in document) {
-  ControlBar.prototype.options_.children.splice(
-    ControlBar.prototype.options_.children.length - 1,
-    0,
-    'pictureInPictureToggle'
-  );
-}
-
 Component.registerComponent('ControlBar', ControlBar);
 export default ControlBar;

src/js/control-bar/picture-in-picture-toggle.js

@@ -27,23 +27,10 @@ class PictureInPictureToggle extends Button {
    */
   constructor(player, options) {
     super(player, options);
+
     this.on(player, ['enterpictureinpicture', 'leavepictureinpicture'], (e) => this.handlePictureInPictureChange(e));
     this.on(player, ['disablepictureinpicturechanged', 'loadedmetadata'], (e) => this.handlePictureInPictureEnabledChange(e));
-
-    this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], () => {
-      // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time
-      const isSourceAudio = player.currentType().substring(0, 5) === 'audio';
-
-      if (isSourceAudio || player.audioPosterMode() || player.audioOnlyMode()) {
-        if (player.isInPictureInPicture()) {
-          player.exitPictureInPicture();
-        }
-        this.hide();
-      } else {
-        this.show();
-      }
-
-    });
+    this.on(player, ['loadedmetadata', 'audioonlymodechange', 'audiopostermodechange'], () => this.handlePictureInPictureAudioModeChange());
 
     // TODO: Deactivate button on player emptied event.
     this.disable();
@@ -56,7 +43,30 @@ class PictureInPictureToggle extends Button {
    *         The DOM `className` for this object.
    */
   buildCSSClass() {
-    return `vjs-picture-in-picture-control ${super.buildCSSClass()}`;
+    return `vjs-picture-in-picture-control vjs-hidden ${super.buildCSSClass()}`;
+  }
+
+  /**
+   * Displays or hides the button depending on the audio mode detection.
+   * Exits picture-in-picture if it is enabled when switching to audio mode.
+   */
+  handlePictureInPictureAudioModeChange() {
+    // This audio detection will not detect HLS or DASH audio-only streams because there was no reliable way to detect them at the time
+    const isSourceAudio = this.player_.currentType().substring(0, 5) === 'audio';
+    const isAudioMode =
+      isSourceAudio || this.player_.audioPosterMode() || this.player_.audioOnlyMode();
+
+    if (!isAudioMode) {
+      this.show();
+
+      return;
+    }
+
+    if (this.player_.isInPictureInPicture()) {
+      this.player_.exitPictureInPicture();
+    }
+
+    this.hide();
   }
 
   /**
@@ -117,6 +127,18 @@ class PictureInPictureToggle extends Button {
     }
   }
 
+  /**
+   * Show the `Component`s element if it is hidden by removing the
+   * 'vjs-hidden' class name from it only in browsers that support the Picture-in-Picture API.
+   */
+  show() {
+    // Does not allow to display the pictureInPictureToggle in browsers that do not support the Picture-in-Picture API, e.g. Firefox.
+    if (typeof document.exitPictureInPicture !== 'function') {
+      return;
+    }
+
+    super.show();
+  }
 }
 
 /**

test/unit/controls.test.js

@@ -293,7 +293,11 @@ QUnit.test('Picture-in-Picture control is hidden when the source is audio', func
   player.src({src: 'example.mp4', type: 'video/mp4'});
   player.trigger('loadedmetadata');
 
-  assert.notOk(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is not hidden initially');
+  if (document.exitPictureInPicture) {
+    assert.notOk(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is not hidden initially');
+  } else {
+    assert.ok(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is hidden if PiP is not supported');
+  }
 
   player.src({src: 'example1.mp3', type: 'audio/mp3'});
   player.trigger('loadedmetadata');
@@ -318,7 +322,11 @@ QUnit.test('Picture-in-Picture control is displayed if docPiP is enabled', funct
   player.src({src: 'example.mp4', type: 'video/mp4'});
   player.trigger('loadedmetadata');
 
-  assert.notOk(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is not hidden');
+  if (document.exitPictureInPicture) {
+    assert.notOk(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is not hidden');
+  } else {
+    assert.ok(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is hidden if PiP is not supported');
+  }
 
   player.dispose();
   pictureInPictureToggle.dispose();
@@ -327,6 +335,24 @@ QUnit.test('Picture-in-Picture control is displayed if docPiP is enabled', funct
   }
 });
 
+QUnit.test('Picture-in-Picture control should only be displayed if the browser supports it', function(assert) {
+  const player = TestHelpers.makePlayer();
+  const pictureInPictureToggle = new PictureInPictureToggle(player);
+
+  player.trigger('loadedmetadata');
+
+  if (document.exitPictureInPicture) {
+    // Browser that does support PiP
+    assert.false(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is not hidden');
+  } else {
+    // Browser that does not support PiP
+    assert.true(pictureInPictureToggle.hasClass('vjs-hidden'), 'pictureInPictureToggle button is hidden');
+  }
+
+  player.dispose();
+  pictureInPictureToggle.dispose();
+});
+
 QUnit.test('Fullscreen control text should be correct when fullscreenchange is triggered', function(assert) {
   const player = TestHelpers.makePlayer({controlBar: false});
   const fullscreentoggle = new FullscreenToggle(player);

test/unit/player.test.js

@@ -3150,15 +3150,20 @@ QUnit.test('audioOnlyMode(true/false) hides/shows video-specific control bar com
   controlBar.getChild('ChaptersButton').update();
 
   player.trigger('ready');
+  player.trigger('loadedmetadata');
   player.hasStarted(true);
 
   // Show all control bar children
   allChildren.forEach(child => {
     const el = controlBar.getChild(child) && controlBar.getChild(child).el_;
 
     if (el) {
-      // Sanity check that component is showing
-      assert.notEqual(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is initially visible`);
+      if (!document.exitPictureInPicture && child === 'PictureInPictureToggle') {
+        assert.equal(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is not visible if PiP is not supported`);
+      } else {
+        // Sanity check that component is showing
+        assert.notEqual(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is initially visible`);
+      }
     }
   });
 
@@ -3187,7 +3192,11 @@ QUnit.test('audioOnlyMode(true/false) hides/shows video-specific control bar com
         const el = controlBar.getChild(child) && controlBar.getChild(child).el_;
 
         if (el) {
-          assert.notEqual(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is shown`);
+          if (!document.exitPictureInPicture && child === 'PictureInPictureToggle') {
+            assert.equal(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is not visible if PiP is not supported`);
+          } else {
+            assert.notEqual(TestHelpers.getComputedStyle(el, 'display'), 'none', `${child} is shown`);
+          }
         }
       });
     })