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messages.py
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# -*- coding: utf-8 -*-
##
## This file is part of Invenio.
## Copyright (C) 2007, 2008, 2009, 2010, 2011 CERN.
##
## Invenio 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.
##
## Invenio 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 Invenio; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
Invenio international messages functions, to be used by all
I18N interfaces. Typical usage in the caller code is:
from messages import gettext_set_language
[...]
def square(x, ln=CFG_SITE_LANG):
_ = gettext_set_language(ln)
print _("Hello there!")
print _("The square of %s is %s.") % (x, x*x)
In the caller code, all output strings should be made translatable via
the _() convention.
For more information, see ABOUT-NLS file.
"""
__revision__ = "$Id$"
import gettext
from invenio.config import CFG_LOCALEDIR, CFG_SITE_LANG, CFG_SITE_LANGS
_LANG_GT_D = {}
for _alang in CFG_SITE_LANGS:
_LANG_GT_D[_alang] = gettext.translation('invenio',
CFG_LOCALEDIR,
languages = [_alang],
fallback = True)
def gettext_set_language(ln):
"""
Set the _ gettext function in every caller function
Usage::
_ = gettext_set_language(ln)
"""
return _LANG_GT_D[ln].gettext
def wash_language(ln):
"""Look at language LN and check if it is one of allowed languages
for the interface. Return it in case of success, return the
default language otherwise."""
if not ln:
return CFG_SITE_LANG
if isinstance(ln, list):
ln = ln[0]
ln = ln.replace('-', '_')
if ln in CFG_SITE_LANGS:
return ln
elif ln[:2] in CFG_SITE_LANGS:
return ln[:2]
else:
return CFG_SITE_LANG
def wash_languages(lns):
"""Look at list of languages LNS and check if there's at least one
of the allowed languages for the interface. Return it in case
of success, return the default language otherwise."""
for ln in lns:
if ln:
ln = ln.replace('-', '_')
if ln in CFG_SITE_LANGS:
return ln
elif ln[:2] in CFG_SITE_LANGS:
return ln[:2]
return CFG_SITE_LANG
def language_list_long(enabled_langs_only=True):
"""
Return list of [short name, long name] for all enabled languages,
in the same language order as they appear in CFG_SITE_LANG.
If 'enabled_langs_only' is set to False, then return all possibly
existing Invenio languages, even if they were not enabled on the
site by the local administrator. Useful for recognizing all I18N
translations in webdoc sources or bibformat templates.
"""
all_language_names = {'af': 'Afrikaans',
'ar': 'العربية',
'bg': 'Български',
'ca': 'Català',
'cs': 'Česky',
'de': 'Deutsch',
'el': 'Ελληνικά',
'en': 'English',
'es': 'Español',
'fr': 'Français',
'hr': 'Hrvatski',
'gl': 'Galego',
'it': 'Italiano',
'ka': 'ქართული',
'rw': 'Kinyarwanda',
'lt': 'Lietuvių',
'hu': 'Magyar',
'ja': '日本語',
'no': 'Norsk/Bokmål',
'pl': 'Polski',
'pt': 'Português',
'ro': 'Română',
'ru': 'Русский',
'sk': 'Slovensky',
'sv': 'Svenska',
'uk': 'Українська',
'zh_CN': '中文(简)',
'zh_TW': '中文(繁)',}
if enabled_langs_only:
enabled_lang_list = []
for lang in CFG_SITE_LANGS:
enabled_lang_list.append([lang, all_language_names[lang]])
return enabled_lang_list
else:
return [[lang, lang_long] for lang, lang_long in \
all_language_names.iteritems()]
def is_language_rtl(ln):
"""
Returns True or False depending on whether language is
right-to-left direction.
@param ln: language
@type ln: str
@return: is language right-to-left direction?
@rtype: bool
"""
if ln in ('ar',):
return True
return False

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