fix: Control-bar autohide when cursor placed over it #5258 (#5692)

Listen to 'mouseenter' and 'mouseleave' events when triggered in the control-bar and temporarily sets inactivity timeout to zero before restoring it.

Closes #5258

src/js/player.js

@@ -3444,6 +3444,23 @@ class Player extends Component {
     this.on('mousemove', handleMouseMove);
     this.on('mouseup', handleMouseUp);
 
+    const controlBar = this.getChild('controlBar');
+
+    if (controlBar) {
+
+      controlBar.on('mouseenter', function(event) {
+
+        this.player().cache_.inactivityTimeout = this.player().options_.inactivityTimeout;
+        this.player().options_.inactivityTimeout = 0;
+
+      });
+
+      controlBar.on('mouseleave', function(event) {
+        this.player().options_.inactivityTimeout = this.player().cache_.inactivityTimeout;
+      });
+
+    }
+
     // Listen for keyboard navigation
     // Shouldn't need to use inProgress interval because of key repeat
     this.on('keydown', handleActivity);

test/unit/player.test.js

@@ -13,6 +13,7 @@ import document from 'global/document';
 import sinon from 'sinon';
 import window from 'global/window';
 import * as middleware from '../../src/js/tech/middleware.js';
+import * as Events from '../../src/js/utils/events.js';
 
 QUnit.module('Player', {
   beforeEach() {
@@ -2026,3 +2027,26 @@ QUnit.test('setting all children to false, does not cause an assertion', functio
   player.dispose();
   assert.ok(true, 'did not cause an assertion');
 });
+
+QUnit.test('controlBar behaviour with mouseenter and mouseleave events', function(assert) {
+
+  const player = TestHelpers.makePlayer();
+
+  player.listenForUserActivity_();
+
+  assert.equal(player.options_.inactivityTimeout, 2000, 'inactivityTimeout default value is 2000');
+
+  const el = player.getChild('controlBar').el();
+
+  // move mouse to controlBar
+  Events.trigger(el, 'mouseenter');
+
+  assert.equal(player.options_.inactivityTimeout, 0, 'mouseenter on control-bar, inactivityTimeout is set to 0');
+
+  // move mouse out of controlBar bounds
+  Events.trigger(el, 'mouseleave');
+
+  assert.equal(player.options_.inactivityTimeout, player.cache_.inactivityTimeout, 'mouse leaves control-bar, inactivityTimeout is set to default value (2000)');
+
+  player.dispose();
+});