# Copyright (C) 1998,1999,2000,2001,2002 by the Free Software Foundation, Inc. # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License # as published by the Free Software Foundation; either version 2 # of the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. """A `safe' dictionary for string interpolation.""" from types import StringType from UserDict import UserDict COMMASPACE = ', ' class SafeDict(UserDict): """Dictionary which returns a default value for unknown keys. This is used in maketext so that editing templates is a bit more robust. """ def __getitem__(self, key): try: return self.data[key] except KeyError: if isinstance(key, StringType): return '%('+key+')s' else: return '<Missing key: %s>' % `key` def interpolate(self, template): return template % self class MsgSafeDict(SafeDict): def __init__(self, msg, dict=None): self.__msg = msg SafeDict.__init__(self, dict) def __getitem__(self, key): if key.startswith('msg_'): return self.__msg.get(key[4:], 'n/a') elif key.startswith('allmsg_'): missing = [] all = self.__msg.get_all(key[7:], missing) if all is missing: return 'n/a' return COMMASPACE.join(all) else: return SafeDict.__getitem__(self, key) def copy(self): d = self.data.copy() for k in self.__msg.keys(): vals = self.__msg.get_all(k) if len(vals) == 1: d['msg_'+k.lower()] = vals[0] else: d['allmsg_'+k.lower()] = COMMASPACE.join(vals) return d