wayland: restore support for the application menu

If the compositor supports the gtk-shell interface, use it to
export the application ID, dbus name and paths that can be used
for the application menu.

https://bugzilla.gnome.org/show_bug.cgi?id=707129

gdk/wayland/gdkwaylandwindow.h

@@ -53,6 +53,15 @@ struct wl_shell_surface *gdk_wayland_window_get_wl_shell_surface (GdkWindow *win
 GDK_AVAILABLE_IN_ALL
 void                     gdk_wayland_window_set_use_custom_surface (GdkWindow *window);
 
+GDK_AVAILABLE_IN_3_10
+void                     gdk_wayland_window_set_dbus_properties_libgtk_only (GdkWindow  *window,
+									     const char *application_id,
+									     const char *app_menu_path,
+									     const char *menubar_path,
+									     const char *window_object_path,
+									     const char *application_object_path,
+									     const char *unique_bus_name);
+
 G_END_DECLS
 
 #endif /* __GDK_WAYLAND_WINDOW_H__ */

gdk/wayland/gdkwindow-wayland.c

@@ -2289,3 +2289,33 @@ gdk_wayland_window_set_use_custom_surface (GdkWindow *window)
 
   impl->use_custom_surface = TRUE;
 }
+
+void
+gdk_wayland_window_set_dbus_properties_libgtk_only (GdkWindow  *window,
+						    const char *application_id,
+						    const char *app_menu_path,
+						    const char *menubar_path,
+						    const char *window_object_path,
+						    const char *application_object_path,
+						    const char *unique_bus_name)
+{
+  GdkWindowImplWayland *impl;
+
+  g_return_if_fail (GDK_IS_WAYLAND_WINDOW (window));
+
+  impl = GDK_WINDOW_IMPL_WAYLAND (window->impl);
+
+  if (!impl->surface)
+    gdk_wayland_window_create_surface (window);
+
+  if (impl->gtk_surface == NULL)
+    return;
+
+  gtk_surface_set_dbus_properties (impl->gtk_surface,
+				   application_id,
+				   app_menu_path,
+				   menubar_path,
+				   window_object_path,
+				   application_object_path,
+				   unique_bus_name);
+}

gtk/gtkapplicationwindow.c

@@ -34,6 +34,9 @@
 #ifdef GDK_WINDOWING_X11
 #include <gdk/x11/gdkx.h>
 #endif
+#ifdef GDK_WINDOWING_WAYLAND
+#include <gdk/wayland/gdkwayland.h>
+#endif
 
 #ifdef HAVE_GIO_UNIX
 #include <gio/gdesktopappinfo.h>
@@ -865,8 +868,28 @@ gtk_application_window_real_map (GtkWidget *widget)
   if (window->priv->menubar)
     gtk_widget_map (window->priv->menubar);
 
-  GTK_WIDGET_CLASS (gtk_application_window_parent_class)
-    ->map (widget);
+#ifdef GDK_WINDOWING_WAYLAND
+  {
+    GdkWindow *gdkwindow;
+    GtkApplication *application;
+
+    application = gtk_window_get_application (GTK_WINDOW (window));
+    gdkwindow = gtk_widget_get_window (widget);
+
+    if (GDK_IS_WAYLAND_WINDOW (gdkwindow) && window->priv->session)
+      {
+	gdk_wayland_window_set_dbus_properties_libgtk_only (gdkwindow,
+							    g_application_get_application_id (G_APPLICATION (application)),
+							    gtk_application_get_app_menu_object_path (application),
+							    gtk_application_get_menubar_object_path (application),
+							    window->priv->object_path,
+							    g_application_get_dbus_object_path (G_APPLICATION (application)),
+							    g_dbus_connection_get_unique_name (window->priv->session));
+      }
+  }
+#endif
+
+  GTK_WIDGET_CLASS (gtk_application_window_parent_class)->map (widget);
 }
 
 static void