remote-desktop/session: Add CapsLockState and NumLockState properties

Will be used by remote desktop services that want to try to affect the
end result of these. We cannot let it set these directly, as these needs
to be done using virtual key events to not cause issues in all the XKB
state tracking, so remote desktop services try to deal with this
themself if they need to.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1342
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1739>

src/backends/meta-remote-desktop-session.c

@@ -253,6 +253,10 @@ meta_remote_desktop_session_new (MetaRemoteDesktop  *remote_desktop,
                                  const char         *peer_name,
                                  GError            **error)
 {
+  MetaBackend *backend = meta_remote_desktop_get_backend (remote_desktop);
+  ClutterBackend *clutter_backend = meta_backend_get_clutter_backend (backend);
+  ClutterSeat *seat = clutter_backend_get_default_seat (clutter_backend);
+  ClutterKeymap *keymap = clutter_seat_get_keymap (seat);
   GDBusInterfaceSkeleton *interface_skeleton;
   MetaRemoteDesktopSession *session;
 
@@ -271,6 +275,13 @@ meta_remote_desktop_session_new (MetaRemoteDesktop  *remote_desktop,
       return NULL;
     }
 
+  g_object_bind_property (keymap, "caps-lock-state",
+                          session, "caps-lock-state",
+                          G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE);
+  g_object_bind_property (keymap, "num-lock-state",
+                          session, "num-lock-state",
+                          G_BINDING_DEFAULT | G_BINDING_SYNC_CREATE);
+
   return session;
 }
 

src/org.gnome.Mutter.RemoteDesktop.xml

@@ -343,6 +343,9 @@
       <arg name="serial" type="u" direction="in" />
     </signal>
 
+    <property name="CapsLockState" type="b" access="read" />
+    <property name="NumLockState" type="b" access="read" />
+
   </interface>
 
 </node>