1 files changed, 62 insertions, 0 deletions
diff --git a/gettextmessagecatalog.py b/gettextmessagecatalog.py
new file mode 100644
index 0000000..36e734f
--- /dev/null
+++ b/gettextmessagecatalog.py
@@ -0,0 +1,62 @@
+##############################################################################
+#
+# Copyright (c) 2001, 2002 Zope Corporation and Contributors.
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+##############################################################################
+"""A simple implementation of a Message Catalog.
+
+$Id$
+"""
+from gettext import GNUTranslations
+from zope.i18n.interfaces import IGlobalMessageCatalog
+from zope.interface import implements
+
+
+class _KeyErrorRaisingFallback(object):
+    def ugettext(self, message):
+        raise KeyError, message
+
+
+class GettextMessageCatalog(object):
+    """A message catalog based on GNU gettext and Python's gettext module."""
+
+    implements(IGlobalMessageCatalog)
+
+    def __init__(self, language, domain, path_to_file):
+        """Initialize the message catalog"""
+        self.language = language
+        self.domain = domain
+        self._path_to_file = path_to_file
+        self.reload()
+        self._catalog.add_fallback(_KeyErrorRaisingFallback())
+
+    def reload(self):
+        'See IMessageCatalog'
+        fp = open(self._path_to_file, 'rb')
+        try:
+            self._catalog = GNUTranslations(fp)
+        finally:
+            fp.close()
+
+    def getMessage(self, id):
+        'See IMessageCatalog'
+        return self._catalog.ugettext(id)
+
+    def queryMessage(self, id, default=None):
+        'See IMessageCatalog'
+        try:
+            return self._catalog.ugettext(id)
+        except KeyError:
+            return default
+
+    def getIdentifier(self):
+        'See IMessageCatalog'
+        return self._path_to_file