linkchecker/linkcheck/i18n.py
2004-11-23 23:31:13 +00:00

140 lines
4.2 KiB
Python

# -*- coding: iso-8859-1 -*-
"""application internationalization support"""
# Copyright (C) 2000-2004 Bastian Kleineidam
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
# i18n suppport
import os
import locale
import gettext
# more supported languages are added in init()
supported_languages = ['en']
default_language = None
def install_builtin (self, do_unicode):
"""install _() and _n() gettext methods into default namespace"""
import __builtin__
if do_unicode:
__builtin__.__dict__['_'] = self.ugettext
# also install ngettext
__builtin__.__dict__['_n'] = self.ungettext
else:
__builtin__.__dict__['_'] = self.gettext
# also install ngettext
__builtin__.__dict__['_n'] = self.ngettext
class Translator (gettext.GNUTranslations):
def install (self, do_unicode):
install_builtin(self, do_unicode)
class NullTranslator (gettext.NullTranslations):
def install (self, do_unicode):
install_builtin(self, do_unicode)
def init (domain, directory):
"""initialize this gettext i18n module"""
global default_language
# get supported languages
for lang in os.listdir(directory):
path = os.path.join(directory, lang)
if not os.path.isdir(path):
continue
if os.path.exists(os.path.join(path, 'LC_MESSAGES', '%s.mo'%domain)):
supported_languages.append(lang)
loc = get_locale()
if loc in supported_languages:
default_language = loc
else:
default_language = "en"
# install translation service routines into default namespace
translator = get_translator(domain, directory, fallback=True)
do_unicode = True
translator.install(do_unicode)
def get_translator (domain, directory, languages=None,
translatorklass=Translator,
fallback=False,
fallbackklass=NullTranslator):
"""search the appropriate GNUTranslations class"""
translator = gettext.translation(domain, localedir=directory,
languages=languages, class_=translatorklass, fallback=fallback)
if not isinstance(translator, gettext.GNUTranslations):
translator = fallbackklass()
return translator
def get_lang (lang):
"""return lang if it is supported, or the default language"""
if lang in supported_languages:
return lang
return default_language
def get_headers_lang (headers):
"""return preferred supported language in given HTTP headers"""
if not headers.has_key('Accept-Language'):
return default_language
languages = headers['Accept-Language'].split(",")
# XXX sort with quality values
languages = [ lang.split(";")[0].strip() for lang in languages ]
for lang in languages:
if lang in supported_languages:
return lang
return default_language
def get_locale ():
"""return current configured locale"""
loc = locale.getdefaultlocale()[0]
if loc is None:
loc = 'C'
loc = locale.normalize(loc)
# split up the locale into its base components
pos = loc.find('@')
if pos >= 0:
loc = loc[:pos]
pos = loc.find('.')
if pos >= 0:
loc = loc[:pos]
pos = loc.find('_')
if pos >= 0:
loc = loc[:pos]
return loc
lang_names = {
'en': u'English',
'de': u'Deutsch',
}
lang_transis = {
'de': {'en': u'German'},
'en': {'de': u'Englisch'},
}
def lang_name (lang):
"""return full name of given language"""
return lang_names[lang]
def lang_trans (lang, curlang):
"""return translated full name of given language"""
return lang_transis[lang][curlang]