[gnome-settings-daemon] xsettings: Monitor for the shell, and update Gtk/ShellShowsAppMenu

[Colin Walters <walters src gnome org>]

commit 4c8902a8f10a78ad67b1443ef9039dda526238e8
Author: Colin Walters <walters verbum org>
Date:   Thu Dec 1 19:55:21 2011 -0500

    xsettings: Monitor for the shell, and update Gtk/ShellShowsAppMenu

 plugins/xsettings/gsd-xsettings-manager.c |   46 +++++++++++++++++++++++++++++
 1 files changed, 46 insertions(+), 0 deletions(-)
---
diff --git a/plugins/xsettings/gsd-xsettings-manager.c b/plugins/xsettings/gsd-xsettings-manager.c
index 1fee468..075cb37 100644
--- a/plugins/xsettings/gsd-xsettings-manager.c
+++ b/plugins/xsettings/gsd-xsettings-manager.c
@@ -239,6 +239,8 @@ struct GnomeXSettingsManagerPrivate
         fontconfig_monitor_handle_t *fontconfig_handle;
 
         GsdXSettingsGtk   *gtk;
+
+        guint              shell_name_watch_id;
 };
 
 #define GSD_XSETTINGS_ERROR gsd_xsettings_error_quark ()
@@ -663,6 +665,39 @@ stop_fontconfig_monitor (GnomeXSettingsManager  *manager)
 }
 
 static void
+notify_have_shell (GnomeXSettingsManager   *manager,
+                   gboolean                 have_shell)
+{
+        int i;
+        int timestamp = time (NULL);
+
+        gnome_settings_profile_start (NULL);
+
+        for (i = 0; manager->priv->managers [i]; i++) {
+                xsettings_manager_set_int (manager->priv->managers [i], "Gtk/ShellShowsAppMenu", have_shell);
+                xsettings_manager_notify (manager->priv->managers [i]);
+        }
+        gnome_settings_profile_end (NULL);
+}
+
+static void
+on_shell_appeared (GDBusConnection *connection,
+                   const gchar     *name,
+                   const gchar     *name_owner,
+                   gpointer         user_data)
+{
+        notify_have_shell (user_data, TRUE);
+}
+
+static void
+on_shell_disappeared (GDBusConnection *connection,
+                      const gchar     *name,
+                      gpointer         user_data)
+{
+        notify_have_shell (user_data, FALSE);
+}
+
+static void
 process_value (GnomeXSettingsManager *manager,
                TranslationEntry      *trans,
                GVariant              *value)
@@ -847,6 +882,15 @@ gnome_xsettings_manager_start (GnomeXSettingsManager *manager,
 
         start_fontconfig_monitor (manager);
 
+        /* Shell flag */
+        manager->priv->shell_name_watch_id = g_bus_watch_name (G_BUS_TYPE_SESSION,
+                                                               "org.gnome.Shell",
+                                                               0,
+                                                               on_shell_appeared,
+                                                               on_shell_disappeared,
+                                                               manager,
+                                                               NULL);
+
         for (i = 0; manager->priv->managers [i]; i++)
                 xsettings_manager_set_string (manager->priv->managers [i],
                                               "Net/FallbackIconTheme",
@@ -885,6 +929,8 @@ gnome_xsettings_manager_stop (GnomeXSettingsManager *manager)
 
         stop_fontconfig_monitor (manager);
 
+        g_bus_unwatch_name (manager->priv->shell_name_watch_id);
+
         if (p->settings != NULL) {
                 g_hash_table_destroy (p->settings);
                 p->settings = NULL;