src/collecty/locales.py

   1 #!/usr/bin/python3
   2 ###############################################################################
   3 #                                                                             #
   4 # collecty - A system statistics collection daemon for IPFire                 #
   5 # Copyright (C) 2015 IPFire development team                                  #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21
  22 import gettext
  23 import os
  24
  25 from .constants import *
  26 from .i18n import TEXTDOMAIN
  27
  28 import logging
  29 log = logging.getLogger("collecty.locale")
  30 log.propagate = 1
  31
  32 class Locale(object):
  33         def __init__(self, lang):
  34                 self.lang = lang
  35
  36         def translate(self, message, plural_message=None, count=None):
  37                 if plural_message is not None:
  38                         assert count is not None
  39
  40                         # Replace the message by the plural message if
  41                         # we are using plural.
  42                         if count > 1:
  43                                 message = plural_message
  44
  45                 return message
  46
  47
  48 class GettextLocale(Locale):
  49         def __init__(self, lang, translation):
  50                 Locale.__init__(self, lang)
  51
  52                 self.translation = translation
  53
  54                 # Bind gettext functions
  55                 self.gettext = self.translation.gettext
  56                 self.ngettext = self.translation.ngettext
  57
  58         def translate(self, message, plural_message=None, count=None):
  59                 if plural_message is not None:
  60                         assert count is not None
  61                         return self.ngettext(message, plural_message, count)
  62
  63                 return self.gettext(message)
  64
  65
  66 def _find_all_locales(domain, directory):
  67         locales = {
  68                 DEFAULT_LOCALE : Locale(DEFAULT_LOCALE),
  69         }
  70
  71         for lang in os.listdir(directory):
  72                 if lang.startswith("."):
  73                         continue
  74
  75                 filename = os.path.join(directory, lang, "LC_MESSAGES",
  76                         "%s.mo" % domain)
  77
  78                 # Check if a translation file exists and go on if not
  79                 if not os.path.exists(filename):
  80                         continue
  81
  82                 try:
  83                         translation = gettext.translation(domain,
  84                                 directory, languages=[lang])
  85                 except Exception as e:
  86                         log.error("Cound not load translation for %s: %s" \
  87                                 % (lang, e))
  88                         continue
  89
  90                 locales[lang] = GettextLocale(lang, translation)
  91
  92         log.debug("Loaded translations: %s" % ", ".join(locales.keys()))
  93
  94         return locales
  95
  96 _locales = _find_all_locales(TEXTDOMAIN, "/usr/share/locale")
  97
  98 def get_supported_locales():
  99         return list(_locales.keys())
 100
 101 def get_closest(*langs):
 102         for lang in langs:
 103                 if not lang:
 104                         continue
 105
 106                 lang = lang.replace("-", "_")
 107                 parts = lang.split("_")
 108
 109                 if len(parts) > 2:
 110                         continue
 111
 112                 elif len(parts) == 2:
 113                         parts[0] = parts[0].lower()
 114                         parts[1] = parts[1].upper()
 115                         lang = "_".join(parts)
 116
 117                 for l in (lang, parts[0]):
 118                         try:
 119                                 return _locales[l]
 120                         except KeyError:
 121                                 pass
 122
 123 def get(*langs):
 124         return get_closest(*langs) or _locales.get(DEFAULT_LOCALE, None)