Allow substitution of messages as variables in other messages.

grit/gather/interface.py

 #!/usr/bin/env python
 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 '''Interface for all gatherers.
 '''
 
 
 from grit import clique
@@ skipping 81 matching lines @@
 
     Raises:
       grit.exception.NotReady() if used before Parse() has been successfully
       called.
       grit.exception.NoSuchTranslation() if 'pseudo_if_not_available' and
       fallback_to_english are both false and there is no translation for the
       requested language.
     '''
     raise NotImplementedError()
 
+  @staticmethod
   def FromFile(rc_file, extkey=None, encoding = 'cp1252'):
     '''Loads the resource from the file 'rc_file'.  Optionally an external key
     (which gets passed to the gatherer's constructor) can be specified.
 
     If 'rc_file' is a filename, it will be opened for reading using 'encoding'.
     Otherwise the 'encoding' parameter is ignored.
 
     Args:
       rc_file: file('') | 'filename.rc'
       extkey: e.g. 'ID_MY_DIALOG'
       encoding: 'utf-8'
 
     Return:
       grit.gather.interface.GathererBase subclass
     '''
     raise NotImplementedError()
-  FromFile = staticmethod(FromFile)
 
+  def SubstituteMessages(self, substituter):
+    '''Applies substitutions to all messages in the gatherer.
+
+    Args:
+      substituter: a grit.util.Substituter object.
+    '''
+    pass
+