From 853f0eae5886f3e6b19265da1bbd01138253a5d9 Mon Sep 17 00:00:00 2001
From: bruvzg <7645683+bruvzg@users.noreply.github.com>
Date: Wed, 8 Feb 2023 09:45:00 +0200
Subject: [PATCH] [X11] Fix initial "on top" window state.

---
 platform/linuxbsd/x11/display_server_x11.cpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/platform/linuxbsd/x11/display_server_x11.cpp b/platform/linuxbsd/x11/display_server_x11.cpp
index 896b7b95eb9..30ab59dfd1d 100644
--- a/platform/linuxbsd/x11/display_server_x11.cpp
+++ b/platform/linuxbsd/x11/display_server_x11.cpp
@@ -2057,6 +2057,22 @@ void DisplayServerX11::_validate_mode_on_map(WindowID p_window) {
 	} else if (wd.minimized && !_window_minimize_check(p_window)) {
 		_set_wm_minimized(p_window, true);
 	}
+
+	if (wd.on_top) {
+		Atom wm_state = XInternAtom(x11_display, "_NET_WM_STATE", False);
+		Atom wm_above = XInternAtom(x11_display, "_NET_WM_STATE_ABOVE", False);
+
+		XClientMessageEvent xev;
+		memset(&xev, 0, sizeof(xev));
+		xev.type = ClientMessage;
+		xev.window = wd.x11_window;
+		xev.message_type = wm_state;
+		xev.format = 32;
+		xev.data.l[0] = _NET_WM_STATE_ADD;
+		xev.data.l[1] = wm_above;
+		xev.data.l[3] = 1;
+		XSendEvent(x11_display, DefaultRootWindow(x11_display), False, SubstructureRedirectMask | SubstructureNotifyMask, (XEvent *)&xev);
+	}
 }
 
 bool DisplayServerX11::window_is_maximize_allowed(WindowID p_window) const {