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Diffstat (limited to 'bzrlib/i18n.py')
| -rw-r--r-- | bzrlib/i18n.py | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/bzrlib/i18n.py b/bzrlib/i18n.py new file mode 100644 index 0000000..5f922e8 --- /dev/null +++ b/bzrlib/i18n.py @@ -0,0 +1,206 @@ +# -*- coding: utf-8 -*- +# +# Copyright (C) 2007 Lukáš Lalinský <lalinsky@gmail.com> +# Copyright (C) 2007,2009 Alexander Belchenko <bialix@ukr.net> +# Copyright (C) 2011 Canonical Ltd +# +# This program 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 2 of the License, or +# (at your option) any later version. +# +# This program 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 this program; if not, write to the Free Software +# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + +# This module is copied from Bazaar Explorer and modified for bzr. + +"""i18n and l10n support for Bazaar.""" + +from __future__ import absolute_import + +import gettext as _gettext +import os +import sys + + +_translations = None + + +def gettext(message): + """Translate message. + + :returns: translated message as unicode. + """ + install() + return _translations.ugettext(message) + + +def ngettext(singular, plural, number): + """Translate message with plural forms based on `number`. + + :param singular: English language message in singular form + :param plural: English language message in plural form + :param number: the number this message should be translated for + + :returns: translated message as unicode. + """ + install() + return _translations.ungettext(singular, plural, number) + + +def N_(msg): + """Mark message for translation but don't translate it right away.""" + return msg + + +def gettext_per_paragraph(message): + """Translate message per paragraph. + + :returns: concatenated translated message as unicode. + """ + install() + paragraphs = message.split(u'\n\n') + ugettext = _translations.ugettext + # Be careful not to translate the empty string -- it holds the + # meta data of the .po file. + return u'\n\n'.join(ugettext(p) if p else u'' for p in paragraphs) + + +def disable_i18n(): + """Do not allow i18n to be enabled. Useful for third party users + of bzrlib.""" + global _translations + _translations = _gettext.NullTranslations() + + +def installed(): + """Returns whether translations are in use or not.""" + return _translations is not None + + +def install(lang=None): + """Enables gettext translations in bzr.""" + global _translations + if installed(): + return + _translations = install_translations(lang) + + +def install_translations(lang=None, domain='bzr', locale_base=None): + """Create a gettext translation object. + + :param lang: language to install. + :param domain: translation domain to install. + :param locale_base: plugins can specify their own directory. + + :returns: a gettext translations object to use + """ + if lang is None: + lang = _get_current_locale() + if lang is not None: + languages = lang.split(':') + else: + languages = None + translation = _gettext.translation( + domain, + localedir=_get_locale_dir(locale_base), + languages=languages, + fallback=True) + return translation + + +def add_fallback(fallback): + """ + Add a fallback translations object. Typically used by plugins. + + :param fallback: gettext.GNUTranslations object + """ + install() + _translations.add_fallback(fallback) + + +def uninstall(): + """Disables gettext translations.""" + global _translations + _translations = None + + +def _get_locale_dir(base): + """Returns directory to find .mo translations file in, either local or system + + :param base: plugins can specify their own local directory + """ + fs_enc = sys.getfilesystemencoding() + if getattr(sys, 'frozen', False): + if base is None: + base = os.path.dirname(unicode(sys.executable, fs_enc)) + return os.path.join(base, u'locale') + else: + if base is None: + base = os.path.dirname(unicode(__file__, fs_enc)) + dirpath = os.path.realpath(os.path.join(base, u'locale')) + if os.path.exists(dirpath): + return dirpath + return os.path.join(unicode(sys.prefix, fs_enc), u"share", u"locale") + + +def _check_win32_locale(): + for i in ('LANGUAGE','LC_ALL','LC_MESSAGES','LANG'): + if os.environ.get(i): + break + else: + lang = None + import locale + try: + import ctypes + except ImportError: + # use only user's default locale + lang = locale.getdefaultlocale()[0] + else: + # using ctypes to determine all locales + lcid_user = ctypes.windll.kernel32.GetUserDefaultLCID() + lcid_system = ctypes.windll.kernel32.GetSystemDefaultLCID() + if lcid_user != lcid_system: + lcid = [lcid_user, lcid_system] + else: + lcid = [lcid_user] + lang = [locale.windows_locale.get(i) for i in lcid] + lang = ':'.join([i for i in lang if i]) + # set lang code for gettext + if lang: + os.environ['LANGUAGE'] = lang + + +def _get_current_locale(): + if not os.environ.get('LANGUAGE'): + from bzrlib import config + lang = config.GlobalStack().get('language') + if lang: + os.environ['LANGUAGE'] = lang + return lang + if sys.platform == 'win32': + _check_win32_locale() + for i in ('LANGUAGE','LC_ALL','LC_MESSAGES','LANG'): + lang = os.environ.get(i) + if lang: + return lang + return None + + +def load_plugin_translations(domain): + """Load the translations for a specific plugin. + + :param domain: Gettext domain name (usually 'bzr-PLUGINNAME') + """ + locale_base = os.path.dirname( + unicode(__file__, sys.getfilesystemencoding())) + translation = install_translations(domain=domain, + locale_base=locale_base) + add_fallback(translation) + return translation |