def ActivateTranslation(session, config, language, localedir=None):
global ACTIVE_TRANSLATION, RECENTLY_TRANSLATED
if not language:
language = os.getenv('LANG', None)
if not localedir:
import mailpile.config.paths
localedir = mailpile.config.paths.DEFAULT_LOCALE_DIRECTORY()
trans = None
if (not language) or language[:5].lower() in ('en', 'en_us', 'c'):
trans = NullTranslations()
elif language:
try:
trans = translation("mailpile",
localedir, [language],
codeset="utf-8")
except IOError:
if session:
session.ui.debug('Failed to load language %s' % language)
if not trans:
trans = translation("mailpile",
localedir,
codeset='utf-8',
fallback=True)
if session:
session.ui.debug('Failed to configure i18n (%s). '
'Using fallback.' % language)
if trans:
with RECENTLY_TRANSLATED_LOCK:
RECENTLY_TRANSLATED = []
ACTIVE_TRANSLATION = trans
trans.org_gettext = trans.gettext
trans.org_ngettext = trans.ngettext
trans.gettext = lambda t, g: gettext(g)
trans.ngettext = lambda t, s1, s2, n: ngettext(s1, s2, n)
trans.set_output_charset("utf-8")
if hasattr(config, 'jinja_env'):
config.jinja_env.install_gettext_translations(trans, newstyle=True)
if session and language and not isinstance(trans, NullTranslations):
session.ui.debug(gettext('Loaded language %s') % language)
return trans
