Make meta_display_xwindow_is_a_no_focus_window public

Useful for window analysis in plugins.

src/core/display-private.h

@@ -348,9 +348,6 @@ void        meta_display_register_x_window   (MetaDisplay *display,
                                               MetaWindow  *window);
 void        meta_display_unregister_x_window (MetaDisplay *display,
                                               Window       xwindow);
-/* Return whether the xwindow is a no focus window for any of the screens */
-gboolean    meta_display_xwindow_is_a_no_focus_window (MetaDisplay *display,
-                                                       Window xwindow);
 
 GSList*     meta_display_list_windows        (MetaDisplay          *display,
                                               MetaListWindowsFlags  flags);

src/core/display.c

@@ -3175,6 +3175,15 @@ meta_display_unregister_x_window (MetaDisplay *display,
   remove_pending_pings_for_window (display, xwindow);
 }
 
+/**
+ * meta_display_xwindow_is_a_no_focus_window:
+ * @display: A #MetaDisplay
+ * @xwindow: An X11 window
+ *
+ * Returns %TRUE iff window is one of mutter's internal "no focus" windows
+ * (there is one per screen) which will have the focus when there is no
+ * actual client window focused.
+ */
 gboolean
 meta_display_xwindow_is_a_no_focus_window (MetaDisplay *display,
                                            Window xwindow)

src/include/display.h

@@ -75,6 +75,9 @@ MetaScreen *meta_display_screen_for_root (MetaDisplay *display,
                                           Window       xroot);
 MetaWindow *meta_display_get_focus_window (MetaDisplay *display);
 
+gboolean  meta_display_xwindow_is_a_no_focus_window (MetaDisplay *display,
+                                                     Window xwindow);
+
 int meta_display_get_damage_event_base (MetaDisplay *display);
 int meta_display_get_shape_event_base (MetaDisplay *display);
 Atom meta_display_get_atom (MetaDisplay *display, MetaAtom meta_atom);