Set seekbar listening when UMO is visible to user

CurrentlyExpanded is always true. So listening attribute in
seekbarViewModel is always true. This makes SystemUI execute a runnable
repeatedly.
A listener is added to MediaScrollViewHolder to update players seekbar
whenever visibleToUser attribute is updated to make sure that listening
attribute is false when UMO is not visible to user.

Bug: 268191023
Test: atest MediaCaroselControllerTest
Change-Id: I3296cd6b560fa886b2fdb1dc11634a4df746fde9

packages/SystemUI/src/com/android/systemui/media/controls/ui/MediaCarouselController.kt

@@ -164,13 +164,13 @@ constructor(
                 mediaCarouselScrollHandler.scrollToStart()
             }
         }
-    private var currentlyExpanded = true
+
+    @VisibleForTesting
+    var currentlyExpanded = true
         set(value) {
             if (field != value) {
                 field = value
-                for (player in MediaPlayerData.players()) {
-                    player.setListening(field)
-                }
+                updateSeekbarListening(mediaCarouselScrollHandler.visibleToUser)
             }
         }
 
@@ -259,6 +259,7 @@ constructor(
                 executor,
                 this::onSwipeToDismiss,
                 this::updatePageIndicatorLocation,
+                this::updateSeekbarListening,
                 this::closeGuts,
                 falsingCollector,
                 falsingManager,
@@ -618,7 +619,9 @@ constructor(
                     )
                 newPlayer.mediaViewHolder?.player?.setLayoutParams(lp)
                 newPlayer.bindPlayer(data, key)
-                newPlayer.setListening(currentlyExpanded)
+                newPlayer.setListening(
+                    mediaCarouselScrollHandler.visibleToUser && currentlyExpanded
+                )
                 MediaPlayerData.addMediaPlayer(
                     key,
                     data,
@@ -914,6 +917,13 @@ constructor(
                 .toFloat()
     }
 
+    /** Update listening to seekbar. */
+    private fun updateSeekbarListening(visibleToUser: Boolean) {
+        for (player in MediaPlayerData.players()) {
+            player.setListening(visibleToUser && currentlyExpanded)
+        }
+    }
+
     /** Update the dimension of this carousel. */
     private fun updateCarouselDimensions() {
         var width = 0

packages/SystemUI/src/com/android/systemui/media/controls/ui/MediaCarouselScrollHandler.kt

@@ -57,6 +57,7 @@ class MediaCarouselScrollHandler(
     private val mainExecutor: DelayableExecutor,
     val dismissCallback: () -> Unit,
     private var translationChangedListener: () -> Unit,
+    private var seekBarUpdateListener: (visibleToUser: Boolean) -> Unit,
     private val closeGuts: (immediate: Boolean) -> Unit,
     private val falsingCollector: FalsingCollector,
     private val falsingManager: FalsingManager,
@@ -177,6 +178,12 @@ class MediaCarouselScrollHandler(
 
     /** Whether the media card is visible to user if any */
     var visibleToUser: Boolean = false
+        set(value) {
+            if (field != value) {
+                field = value
+                seekBarUpdateListener.invoke(field)
+            }
+        }
 
     /** Whether the quick setting is expanded or not */
     var qsExpanded: Boolean = false

packages/SystemUI/src/com/android/systemui/media/controls/ui/MediaControlPanel.java

@@ -346,6 +346,11 @@ public class MediaControlPanel {
         mSeekBarViewModel.setListening(listening);
     }
 
+    @VisibleForTesting
+    public boolean getListening() {
+        return mSeekBarViewModel.getListening();
+    }
+
     /** Sets whether the user is touching the seek bar to change the track position. */
     private void setIsScrubbing(boolean isScrubbing) {
         if (mMediaData == null || mMediaData.getSemanticActions() == null) {

packages/SystemUI/tests/src/com/android/systemui/media/controls/ui/MediaCarouselControllerTest.kt

@@ -69,6 +69,8 @@ import org.mockito.Captor
 import org.mockito.Mock
 import org.mockito.Mockito.floatThat
 import org.mockito.Mockito.mock
+import org.mockito.Mockito.reset
+import org.mockito.Mockito.times
 import org.mockito.Mockito.verify
 import org.mockito.Mockito.`when` as whenever
 import org.mockito.MockitoAnnotations
@@ -796,4 +798,59 @@ class MediaCarouselControllerTest : SysuiTestCase() {
 
             job.cancel()
         }
+
+    @Test
+    fun testInvisibleToUserAndExpanded_playersNotListening() {
+        // Add players to carousel.
+        testPlayerOrdering()
+
+        // Make the carousel visible to user in expanded layout.
+        mediaCarouselController.currentlyExpanded = true
+        mediaCarouselController.mediaCarouselScrollHandler.visibleToUser = true
+
+        // panel is the player for each MediaPlayerData.
+        // Verify that seekbar listening attribute in media control panel is set to true.
+        verify(panel, times(MediaPlayerData.players().size)).listening = true
+
+        // Make the carousel invisible to user.
+        mediaCarouselController.mediaCarouselScrollHandler.visibleToUser = false
+
+        // panel is the player for each MediaPlayerData.
+        // Verify that seekbar listening attribute in media control panel is set to false.
+        verify(panel, times(MediaPlayerData.players().size)).listening = false
+    }
+
+    @Test
+    fun testVisibleToUserAndExpanded_playersListening() {
+        // Add players to carousel.
+        testPlayerOrdering()
+
+        // Make the carousel visible to user in expanded layout.
+        mediaCarouselController.currentlyExpanded = true
+        mediaCarouselController.mediaCarouselScrollHandler.visibleToUser = true
+
+        // panel is the player for each MediaPlayerData.
+        // Verify that seekbar listening attribute in media control panel is set to true.
+        verify(panel, times(MediaPlayerData.players().size)).listening = true
+    }
+
+    @Test
+    fun testUMOCollapsed_playersNotListening() {
+        // Add players to carousel.
+        testPlayerOrdering()
+
+        // Make the carousel in collapsed layout.
+        mediaCarouselController.currentlyExpanded = false
+
+        // panel is the player for each MediaPlayerData.
+        // Verify that seekbar listening attribute in media control panel is set to false.
+        verify(panel, times(MediaPlayerData.players().size)).listening = false
+
+        // Make the carousel visible to user.
+        reset(panel)
+        mediaCarouselController.mediaCarouselScrollHandler.visibleToUser = true
+
+        // Verify that seekbar listening attribute in media control panel is set to false.
+        verify(panel, times(MediaPlayerData.players().size)).listening = false
+    }
 }