ヤミRoot VoidGate

Viewing: i18n.py

# -*- coding: utf-8 -*-
import gettext as gettext_module
from threading import local
import os.path

__all__ = ['activate', 'deactivate', 'gettext', 'ngettext']

_TRANSLATIONS = {None: gettext_module.NullTranslations()}
_CURRENT = local()

_DEFAULT_LOCALE_PATH = os.path.join(os.path.dirname(__file__), 'locale')


def get_translation():
    try:
        return _TRANSLATIONS[_CURRENT.locale]
    except (AttributeError, KeyError):
        return _TRANSLATIONS[None]


def activate(locale, path=None):
    """Set 'locale' as current locale. Search for locale in directory 'path'
    @param locale: language name, eg 'en_GB'"""
    if path is None:
        path = _DEFAULT_LOCALE_PATH
    if locale not in _TRANSLATIONS:
        translation = gettext_module.translation('humanize', path, [locale])
        _TRANSLATIONS[locale] = translation
    _CURRENT.locale = locale
    return _TRANSLATIONS[locale]


def deactivate():
    _CURRENT.locale = None


def gettext(message):
    return get_translation().gettext(message)


def pgettext(msgctxt, message):
    """'Particular gettext' function.
    It works with 'msgctxt' .po modifiers and allow duplicate keys with
    different translations.
    Python 2 don't have support for this GNU gettext function, so we
    reimplement it. It works by joining msgctx and msgid by '4' byte."""
    key = msgctxt + '\x04' + message
    translation = get_translation().gettext(key)
    return message if translation == key else translation


def ngettext(message, plural, num):
    return get_translation().ngettext(message, plural, num)


def gettext_noop(message):
    """Example usage:
    CONSTANTS = [gettext_noop('first'), gettext_noop('second')]
    def num_name(n):
        return gettext(CONSTANTS[n])"""
    return message

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