Fixed the on top issue with the game window, it should not pop up when alt tabbing to some other programs now.

ptlinux/gamebox_runtime.py

@@ -972,6 +972,11 @@ class _X11:
 		"""Raise the mapped game client and give it keyboard focus."""
 
 		self.library.XMapRaised(self.display, window)
+		self.restore_input_focus(window)
+
+	def restore_input_focus(self, window: int) -> None:
+		"""Give a mapped client keyboard focus without raising its host window."""
+
 		self.library.XSetInputFocus(
 			self.display,
 			window,
@@ -1437,6 +1442,27 @@ def _repair_game_window_focus(mapper: _X11, window: int) -> bool:
 	return False
 
 
+def _repair_gamescope_game_window_focus(mapper: _X11, window: int) -> bool:
+	"""Restore nested focus without asking the desktop to activate Gamescope."""
+
+	try:
+		if mapper.window_is_focused(window):
+			return True
+	except Exception:
+		return False
+	try:
+		mapper.restore_input_focus(window)
+		return mapper.window_is_focused(window)
+	except Exception as exc:
+		print(
+			f"Warning: could not restore nested game input focus ({exc}); "
+			"continuing normally",
+			file=sys.stderr,
+			flush=True,
+		)
+	return False
+
+
 def _enable_game_window_scaling(mapper: _X11, window: int) -> bool:
 	"""Enable confirmed resize/maximize actions without risking game startup."""
 
@@ -1572,7 +1598,7 @@ def _maintain_gamescope_game_window_focus(
 		now = time.monotonic()
 		if now < next_focus_repair_at:
 			continue
-		_repair_game_window_focus(mapper, window)
+		_repair_gamescope_game_window_focus(mapper, window)
 		next_focus_repair_at = (
 			time.monotonic() + GAMESCOPE_FOCUS_REPAIR_INTERVAL_SECONDS
 		)