Add api to ibus for retreiving unused config values.

ibus/config.py

 # vim:set et sts=4 sw=4:
 #
 # ibus - The Input Bus
 #
 # Copyright (c) 2007-2010 Peng Huang <shawn.p.huang@gmail.com>
 # Copyright (c) 2007-2010 Red Hat, Inc.
 #
 # This library is free software; you can redistribute it and/or
 # modify it under the terms of the GNU Lesser General Public
 # License as published by the Free Software Foundation; either
@@ skipping 31 matching lines @@
 
     def get_value(self, section, name):
         pass
 
     def set_value(self, section, name, value):
         pass
 
     def unset(self, section, name):
         pass
 
+    def get_unused(self, unread, unwritten):
+        pass
+
     def value_changed(self, section, name, value):
         self.__proxy.ValueChanged(section, name, value)
 
 
 class ConfigProxy(interface.IConfig):
     def __init__ (self, config, dbusconn):
         super(ConfigProxy, self).__init__(dbusconn, IBUS_PATH_CONFIG)
         self.__dbusconn = dbusconn
         self.__config = config
 
     def GetValue(self, section, name):
         return self.__config.get_value(section, name)
 
     def SetValue(self, section, name, value):
         return self.__config.set_value(section, name, value)
 
     def Unset(self, section, name):
         return self.__config.unset(section, name)
 
+    def GetUnused(self, unread, unwritten):
+        return self.__config.get_unused(unread, unwritten)
+
     def Destroy(self):
         self.__config.destroy()
 
 class Config(object.Object):
     __gtype_name__ = "PYIBusConfig"
     __gsignals__ = {
         "reloaded" : (
             gobject.SIGNAL_RUN_LAST,
             gobject.TYPE_NONE,
             ()
@@ skipping 56 matching lines @@
             return self.__config.GetValue(section, name)
         except:
             return default_value
 
     def set_value(self, section, name, value):
         try:
             return self.__config.SetValue(section, name, value)
         except:
             return
 
+    def get_unused(self, unread, unwritten):
+        try:
+            return self.__config.GetUnused(unread, unwritten)
+        except:
+            return
+
     def set_list(self, section, name, value, signature):
         return self.set_value(section, name, dbus.Array(value, signature=signature))
 
     def unset(self, section, name):
         try:
             return self.__config.Unset(section, name)
         except:
             return