Add XChangeProperty Atoms validity checks.

platform/linuxbsd/display_server_x11.cpp

@@ -794,7 +794,9 @@ void DisplayServerX11::window_set_title(const String &p_title, WindowID p_window
 
 	Atom _net_wm_name = XInternAtom(x11_display, "_NET_WM_NAME", false);
 	Atom utf8_string = XInternAtom(x11_display, "UTF8_STRING", false);
+	if (_net_wm_name != None && utf8_string != None) {
 		XChangeProperty(x11_display, wd.x11_window, _net_wm_name, utf8_string, 8, PropModeReplace, (unsigned char *)p_title.utf8().get_data(), p_title.utf8().length());
+	}
 }
 
 void DisplayServerX11::window_set_mouse_passthrough(const Vector<Vector2> &p_region, WindowID p_window) {
@@ -1276,8 +1278,10 @@ void DisplayServerX11::_set_wm_fullscreen(WindowID p_window, bool p_enabled) {
 		hints.flags = 2;
 		hints.decorations = 0;
 		property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
+		if (property != None) {
 			XChangeProperty(x11_display, wd.x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
 		}
+	}
 
 	if (p_enabled) {
 		// Set the window as resizable to prevent window managers to ignore the fullscreen state flag.
@@ -1303,7 +1307,9 @@ void DisplayServerX11::_set_wm_fullscreen(WindowID p_window, bool p_enabled) {
 	// set bypass compositor hint
 	Atom bypass_compositor = XInternAtom(x11_display, "_NET_WM_BYPASS_COMPOSITOR", False);
 	unsigned long compositing_disable_on = p_enabled ? 1 : 0;
+	if (bypass_compositor != None) {
 		XChangeProperty(x11_display, wd.x11_window, bypass_compositor, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&compositing_disable_on, 1);
+	}
 
 	XFlush(x11_display);
 
@@ -1317,8 +1323,10 @@ void DisplayServerX11::_set_wm_fullscreen(WindowID p_window, bool p_enabled) {
 		hints.flags = 2;
 		hints.decorations = window_get_flag(WINDOW_FLAG_BORDERLESS, p_window) ? 0 : 1;
 		property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
+		if (property != None) {
 			XChangeProperty(x11_display, wd.x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
 		}
+	}
 }
 
 void DisplayServerX11::window_set_mode(WindowMode p_mode, WindowID p_window) {
@@ -1511,7 +1519,9 @@ void DisplayServerX11::window_set_flag(WindowFlags p_flag, bool p_enabled, Windo
 			hints.flags = 2;
 			hints.decorations = p_enabled ? 0 : 1;
 			property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
+			if (property != None) {
 				XChangeProperty(x11_display, wd.x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
+			}
 
 			// Preserve window size
 			window_set_size(window_get_size(p_window), p_window);
@@ -3385,7 +3395,9 @@ void DisplayServerX11::set_icon(const Ref<Image> &p_icon) {
 				pr += 4;
 			}
 
+			if (net_wm_icon != None) {
 				XChangeProperty(x11_display, wd.x11_window, net_wm_icon, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)pd.ptr(), pd.size());
+			}
 
 			if (!g_set_icon_error) {
 				break;
@@ -3478,8 +3490,10 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, u
 		{
 			const long pid = OS::get_singleton()->get_process_id();
 			Atom net_wm_pid = XInternAtom(x11_display, "_NET_WM_PID", False);
+			if (net_wm_pid != None) {
 				XChangeProperty(x11_display, wd.x11_window, net_wm_pid, XA_CARDINAL, 32, PropModeReplace, (unsigned char *)&pid, 1);
 			}
+		}
 
 		long im_event_mask = 0;
 
@@ -3526,7 +3540,9 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, u
 		/* set the titlebar name */
 		XStoreName(x11_display, wd.x11_window, "Godot");
 		XSetWMProtocols(x11_display, wd.x11_window, &wm_delete, 1);
+		if (xdnd_aware != None) {
 			XChangeProperty(x11_display, wd.x11_window, xdnd_aware, XA_ATOM, 32, PropModeReplace, (unsigned char *)&xdnd_version, 1);
+		}
 
 		if (xim && xim_style) {
 			// Block events polling while changing input focus
@@ -3557,21 +3573,26 @@ DisplayServerX11::WindowID DisplayServerX11::_create_window(WindowMode p_mode, u
 			hints.flags = 2;
 			hints.decorations = 0;
 			property = XInternAtom(x11_display, "_MOTIF_WM_HINTS", True);
+			if (property != None) {
 				XChangeProperty(x11_display, wd.x11_window, property, property, 32, PropModeReplace, (unsigned char *)&hints, 5);
 			}
+		}
 
 		if (wd.menu_type) {
 			// Set Utility type to disable fade animations.
 			Atom type_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE_UTILITY", False);
 			Atom wt_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE", False);
-
+			if (wt_atom != None && type_atom != None) {
 				XChangeProperty(x11_display, wd.x11_window, wt_atom, XA_ATOM, 32, PropModeReplace, (unsigned char *)&type_atom, 1);
+			}
 		} else {
 			Atom type_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE_NORMAL", False);
 			Atom wt_atom = XInternAtom(x11_display, "_NET_WM_WINDOW_TYPE", False);
 
+			if (wt_atom != None && type_atom != None) {
 				XChangeProperty(x11_display, wd.x11_window, wt_atom, XA_ATOM, 32, PropModeReplace, (unsigned char *)&type_atom, 1);
 			}
+		}
 
 		_update_size_hints(id);