From a4c3551dc6582a9cfe25655a0119a73a099ea8bc Mon Sep 17 00:00:00 2001
From: kobewi <kobewi4e@gmail.com>
Date: Mon, 23 May 2022 23:00:29 +0200
Subject: [PATCH] Force window position if spawned outside screen

---
 scene/main/window.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/scene/main/window.cpp b/scene/main/window.cpp
index cf30ca259d7..73f278bb502 100644
--- a/scene/main/window.cpp
+++ b/scene/main/window.cpp
@@ -1251,6 +1251,15 @@ void Window::popup(const Rect2i &p_screen_rect) {
 
 	set_transient(true);
 	set_visible(true);
+
+	int screen_id = DisplayServer::get_singleton()->window_get_current_screen(get_window_id());
+	Rect2i screen_rect = DisplayServer::get_singleton()->screen_get_usable_rect(screen_id);
+	if (screen_rect != Rect2i() && !screen_rect.intersects(Rect2i(position, size))) {
+		ERR_PRINT(vformat("Window %d spawned at invalid position: %s.", get_window_id(), position));
+		// Window appeared on unavailable screen area, so force it to the center.
+		set_position(screen_rect.size / 2 - size / 2);
+	}
+
 	_post_popup();
 	notification(NOTIFICATION_POST_POPUP);
 }