MainPlayer/PopupPlayer: Use system settings for subtitle size

This will use the exact subtitle sizes the user requested, both for
the main and the popup player. They will always be the same fraction
of the video, even if the popup player is resized.

Author: Thompson3142

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

@@ -25,9 +25,7 @@
 import android.os.Handler;
 import android.os.Looper;
 import android.provider.Settings;
-import android.util.DisplayMetrics;
 import android.util.Log;
-import android.util.TypedValue;
 import android.view.KeyEvent;
 import android.view.View;
 import android.view.ViewGroup;
@@ -44,6 +42,7 @@
 import androidx.recyclerview.widget.ItemTouchHelper;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.google.android.exoplayer2.ui.SubtitleView;
 import com.google.android.exoplayer2.video.VideoSize;
 
 import org.schabi.newpipe.R;
@@ -522,11 +521,8 @@ private void showHideKodiButton() {
 
     @Override
     protected void setupSubtitleView(final float captionScale) {
-        final DisplayMetrics metrics = context.getResources().getDisplayMetrics();
-        final int minimumLength = Math.min(metrics.heightPixels, metrics.widthPixels);
-        final float captionRatioInverse = 20f + 4f * (1.0f - captionScale);
-        binding.subtitleView.setFixedTextSize(
-                TypedValue.COMPLEX_UNIT_PX, minimumLength / captionRatioInverse);
+        binding.subtitleView.setFractionalTextSize(
+                SubtitleView.DEFAULT_TEXT_SIZE_FRACTION * captionScale);
     }
     //endregion
 

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

@@ -424,9 +424,8 @@ public void onCompleted() {
 
     @Override
     protected void setupSubtitleView(final float captionScale) {
-        final float captionRatio = (captionScale - 1.0f) / 5.0f + 1.0f;
         binding.subtitleView.setFractionalTextSize(
-                SubtitleView.DEFAULT_TEXT_SIZE_FRACTION * captionRatio);
+                SubtitleView.DEFAULT_TEXT_SIZE_FRACTION * captionScale);
     }
 
     @Override

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

@@ -1414,6 +1414,10 @@ private void setupSubtitleView() {
         binding.subtitleView.setStyle(captionStyle);
     }
 
+    /**
+     *
+     * @param captionScale Value returned by {@link PlayerHelper#getCaptionScale}.
+     */
     protected abstract void setupSubtitleView(float captionScale);
     //endregion