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# Copyright (C) 2000-2009 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""Internationalization support."""
from __future__ import unicode_literals
__metaclass__ = type
__all__ = [
'_',
'get_translation',
'set_language',
'set_translation',
'using_language',
]
import os
import sys
import time
import string
import gettext
import mailman.messages
from mailman.utilities.string import expand
_translation = None
_missing = object()
MESSAGES_DIR = os.path.dirname(mailman.messages.__file__)
class Template(string.Template):
idpattern = r'[_a-z][_a-z0-9.]*'
class attrdict(dict):
def __getitem__(self, key):
parts = key.split('.')
value = super(attrdict, self).__getitem__(parts.pop(0))
while parts:
value = getattr(value, parts.pop(0), _missing)
if value is _missing:
raise KeyError(key)
return value
def set_language(language=None):
global _translation
if language is not None:
language = [language]
try:
_translation = gettext.translation('mailman', MESSAGES_DIR, language)
except IOError:
# The selected language was not installed in messages, so fall back to
# untranslated English.
_translation = gettext.NullTranslations()
def get_translation():
return _translation
def set_translation(translation):
global _translation
_translation = translation
class using_language(object):
"""Context manager for Python 2.5's `with` statement."""
def __init__(self, language):
self._language = language
self._old_translation = None
def __enter__(self):
self._old_translation = _translation
set_language(self._language)
def __exit__(self, *exc_info):
global _translation
_translation = self._old_translation
# Do not suppress exceptions.
return False
# Set up the global translation based on environment variables. Mostly used
# for command line scripts.
if _translation is None:
_translation = gettext.NullTranslations()
def _(s):
if s == '':
return ''
assert s, 'Cannot translate: {0}'.format(s)
# Do translation of the given string into the current language, and do PEP
# 292 style $-string interpolation into the resulting string.
#
# This lets you write something like:
#
# now = time.ctime(time.time())
# print _('The current time is: $now')
#
# and have it Just Work. Note that the lookup order for keys in the
# original string is 1) locals dictionary, 2) globals dictionary.
#
# Get the frame of the caller.
frame = sys._getframe(1)
# A `safe' dictionary is used so we won't get an exception if there's a
# missing key in the dictionary.
raw_dict = frame.f_globals.copy()
raw_dict.update(frame.f_locals)
# Mailman must be unicode safe internally (i.e. all strings inside Mailman
# must be unicodes). The translation service is one boundary to the
# outside world, so to honor this constraint, make sure that all strings
# to come out of _() are unicodes, even if the translated string or
# dictionary values are 8-bit strings.
tns = _translation.ugettext(s)
charset = _translation.charset() or 'us-ascii'
# Python requires ** dictionaries to have str, not unicode keys. For our
# purposes, keys should always be ascii. Values though should be unicode.
translated_string = expand(tns, attrdict(raw_dict), Template)
if isinstance(translated_string, str):
translated_string = unicode(translated_string, charset)
return translated_string
def ctime(date):
# Don't make these module globals since we have to do runtime translation
# of the strings anyway.
daysofweek = [
_('Mon'), _('Tue'), _('Wed'), _('Thu'),
_('Fri'), _('Sat'), _('Sun')
]
months = [
'',
_('Jan'), _('Feb'), _('Mar'), _('Apr'), _('May'), _('Jun'),
_('Jul'), _('Aug'), _('Sep'), _('Oct'), _('Nov'), _('Dec')
]
tzname = _('Server Local Time')
if isinstance(date, str):
try:
year, mon, day, hh, mm, ss, wday, ydat, dst = time.strptime(date)
if dst in (0, 1):
tzname = time.tzname[dst]
else:
# MAS: No exception but dst = -1 so try
return ctime(time.mktime((year, mon, day, hh, mm, ss, wday,
ydat, dst)))
except (ValueError, AttributeError):
try:
wday, mon, day, hms, year = date.split()
hh, mm, ss = hms.split(':')
year = int(year)
day = int(day)
hh = int(hh)
mm = int(mm)
ss = int(ss)
except ValueError:
return date
else:
for i in range(0, 7):
wconst = (1999, 1, 1, 0, 0, 0, i, 1, 0)
if wday.lower() == time.strftime('%a', wconst).lower():
wday = i
break
for i in range(1, 13):
mconst = (1999, i, 1, 0, 0, 0, 0, 1, 0)
if mon.lower() == time.strftime('%b', mconst).lower():
mon = i
break
else:
year, mon, day, hh, mm, ss, wday, yday, dst = time.localtime(date)
if dst in (0, 1):
tzname = time.tzname[dst]
wday = daysofweek[wday]
mon = months[mon]
return _('$wday $mon $day $hh:$mm:$ss $tzname $year')
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