feat(ui): add dynamic right spacer for top bar alignment

Author: Ljn0626

app/src/main/java/org/schabi/newpipe/player/ui/MainPlayerUi.java

@@ -289,8 +289,10 @@ protected void setupElementsVisibility() {
         binding.topControls.setClickable(true);
         binding.topControls.setFocusable(true);
 
+        binding.metadataView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
         binding.titleTextView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
         binding.channelTextView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
+        updateRightSpacerVisibility();
     }
 
     @Override
@@ -511,6 +513,19 @@ private void showHideKodiButton() {
                 && KoreUtils.shouldShowPlayWithKodi(context, playQueue.getItem().getServiceId())
                 ? View.VISIBLE : View.GONE);
     }
+
+    private void updateRightSpacerVisibility() {
+        final boolean hasAudio = binding.audioTrackTextView.getVisibility() != View.GONE;
+        final boolean hasMeta  = binding.metadataView.getVisibility() != View.GONE;
+        binding.rightSpacer.setVisibility(!hasAudio && !hasMeta
+                ? View.VISIBLE : View.GONE);
+    }
+
+    @Override
+    protected void onTopBarContentChanged() {
+        updateRightSpacerVisibility();
+    }
+
     //endregion
 
 
@@ -934,9 +949,11 @@ public void toggleFullscreen() {
         }
         fragmentListener.onFullscreenStateChanged(isFullscreen);
 
+        binding.metadataView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
         binding.titleTextView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
         binding.channelTextView.setVisibility(isFullscreen ? View.VISIBLE : View.GONE);
         binding.playerCloseButton.setVisibility(isFullscreen ? View.GONE : View.VISIBLE);
+        updateRightSpacerVisibility();
         setupScreenRotationButton();
     }
 

app/src/main/java/org/schabi/newpipe/player/ui/VideoPlayerUi.java

@@ -1029,6 +1029,8 @@ private void updateStreamRelatedViews() {
             binding.audioTrackTextView.setVisibility(View.GONE);
             binding.playbackSpeed.setVisibility(View.GONE);
 
+            onTopBarContentChanged();
+
             binding.playbackEndTime.setVisibility(View.GONE);
             binding.playbackLiveSync.setVisibility(View.GONE);
 
@@ -1135,6 +1137,7 @@ private void buildAudioTrackMenu() {
                 .ifPresent(s -> binding.audioTrackTextView.setText(
                         Localization.audioTrackName(context, s)));
         binding.audioTrackTextView.setVisibility(View.VISIBLE);
+        onTopBarContentChanged();
         audioTrackPopupMenu.setOnMenuItemClickListener(this);
         audioTrackPopupMenu.setOnDismissListener(this);
     }
@@ -1238,6 +1241,9 @@ private void buildCaptionMenu(@NonNull final List<String> availableLanguages) {
 
     protected abstract void onPlaybackSpeedClicked();
 
+    protected void onTopBarContentChanged() {
+    }
+
     private void onQualityClicked() {
         qualityPopupMenu.show();
         isSomePopupMenuVisible = true;

app/src/main/res/layout/player.xml

@@ -177,6 +177,13 @@
                         tools:visibility="visible"
                         tools:text="English (Original)" />
 
+                    <View
+                        android:id="@+id/rightSpacer"
+                        android:layout_width="0dp"
+                        android:layout_height="0dp"
+                        android:layout_weight="1"
+                        android:visibility="gone"/>
+
                     <org.schabi.newpipe.views.NewPipeTextView
                         android:id="@+id/qualityTextView"
                         android:layout_width="wrap_content"