Add lazy gettext functions

lib/l10n/__init__.py

@@ -2,6 +2,7 @@ import gettext
 import re
 
 from django.conf import settings
+from django.utils.functional import lazy
 from django.utils.importlib import import_module
 from django.utils.thread_support import currentThread
 from django.utils.translation import (trans_real as django_trans,
@@ -42,6 +43,9 @@ def ungettext(singular, plural, number, context=None):
         return plural_stripped
     return ret
 
+ugettext_lazy = lazy(ugettext, unicode)
+ungettext_lazy = lazy(ungettext, unicode)
+
 
 def _add_context(context, message):
     # \x04 is a magic gettext number.

lib/l10n/tests/tests.py

@@ -9,10 +9,24 @@ from nose.tools import eq_
 
 import l10n
 from l10n import ugettext as _, ungettext as n_
+from l10n import ugettext_lazy as _lazy, ungettext_lazy as n_lazy
 
 LOCALEDIR = os.path.join('locale', 'xx')
 MOFILE = os.path.join(LOCALEDIR, 'LC_MESSAGES', 'messages.mo')
 
+# Used for the _lazy() tests
+_lazy_strings = {}
+_lazy_strings['nocontext'] = _lazy('this is a test')
+_lazy_strings['context'] = _lazy('What time is it?', 'context_one')
+
+n_lazy_strings = {}
+n_lazy_strings['s_nocontext'] = n_lazy('one light !', 'many lights !', 1)
+n_lazy_strings['p_nocontext'] = n_lazy('one light !', 'many lights !', 3)
+n_lazy_strings['s_context'] = n_lazy('%d poodle please', '%d poodles please',
+                                     1, 'context_one')
+n_lazy_strings['p_context'] = n_lazy('%d poodle please', '%d poodles please',
+                                     3, 'context_one')
+
 
 def setup():
     if not os.path.isdir(os.path.join(LOCALEDIR, 'LC_MESSAGES')):
@@ -84,6 +98,20 @@ def test_ungettext_not_found():
     eq_('yo yos', n_('yo', '  yo  yos  ', 3, 'context'))
 
 
+@with_setup(setup, teardown)
+def test_ugettext_lazy():
+    eq_(unicode(_lazy_strings['nocontext']), 'you ran a test!')
+    eq_(unicode(_lazy_strings['context']), 'What time is it? (context=1)')
+
+
+@with_setup(setup, teardown)
+def test_ungettext_lazy():
+    eq_(unicode(n_lazy_strings['s_nocontext']), 'you found a light!')
+    eq_(unicode(n_lazy_strings['p_nocontext']), 'you found a pile of lights!')
+    eq_(unicode(n_lazy_strings['s_context']), '%d poodle (context=1)')
+    eq_(unicode(n_lazy_strings['p_context']), '%d poodles (context=1)')
+
+
 def test_activate():
     l10n.deactivate_all()
     l10n.activate('fr')