Fix fast seek arc not going under system ui

Author: Stypox

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -580,11 +580,17 @@ public void onChange(final boolean selfChange) {
                             v.getPaddingTop(),
                             v.getPaddingRight(),
                             v.getPaddingBottom());
-                    binding.fastSeekOverlay.setPadding(
-                            v.getPaddingLeft(),
-                            v.getPaddingTop(),
-                            v.getPaddingRight(),
-                            v.getPaddingBottom());
+
+                    // If we added padding to the fast seek overlay, too, it would not go under the
+                    // system ui. Instead we apply negative margins equal to the window insets of
+                    // the opposite side, so that the view covers all of the player (overflowing on
+                    // some sides) and its center coincides with the center of other controls.
+                    final RelativeLayout.LayoutParams fastSeekParams = (RelativeLayout.LayoutParams)
+                            binding.fastSeekOverlay.getLayoutParams();
+                    fastSeekParams.leftMargin = -v.getPaddingRight();
+                    fastSeekParams.topMargin = -v.getPaddingBottom();
+                    fastSeekParams.rightMargin = -v.getPaddingLeft();
+                    fastSeekParams.bottomMargin = -v.getPaddingTop();
                 });
     }