Source Code for Module elisa.core.utils.i18n

  1  # -*- coding: utf-8 -*- 
  2  # Moovida - Home multimedia server 
  3  # Copyright (C) 2006-2009 Fluendo Embedded S.L. (www.fluendo.com). 
  4  # All rights reserved. 
  5  # 
  6  # This file is available under one of two license agreements. 
  7  # 
  8  # This file is licensed under the GPL version 3. 
  9  # See "LICENSE.GPL" in the root of this distribution including a special 
 10  # exception to use Moovida with Fluendo's plugins. 
 11  # 
 12  # The GPL part of Moovida is also available under a commercial licensing 
 13  # agreement from Fluendo. 
 14  # See "LICENSE.Moovida" in the root directory of this distribution package 
 15  # for details on that license. 
 16   
 17  """ 
 18  i18n related functions 
 19  """ 
 20   
 21  __maintainer__ = 'Philippe Normand <philippe@fluendo.com>' 
 22   
 23  from elisa.core import log 
 24  from elisa.extern import msgfmt 
 25  import os 
 26  import sys 
 27  import glob 
 28  import gettext 
 29  import locale 
 30  import pkg_resources 
 31  import platform 
 32   
 33 -def compile_po_files(domain, directory, dest_directory, announce_func=None): 
 34      announce_func = announce_func or (lambda msg: sys.stdout.write("%s\n" % msg)) 
 35   
 36      announce_func("Compiling po files in %r directory for domain %s" % (directory, domain)) 
 37   
 38      package_path = os.path.dirname(dest_directory).replace(os.path.sep, '.') 
 39      basename = os.path.basename(dest_directory) 
 40      mo_files = {package_path: [os.path.join(basename, '*', 
 41                                             'LC_MESSAGES', '*.mo')]} 
 42   
 43      pattern = '%s/*.po' % directory 
 44      for filename in glob.glob(pattern): 
 45          announce_func("Trying to compile %r" % filename) 
 46          basename, ext = os.path.splitext(filename) 
 47          lang = os.path.basename(basename) 
 48          src = filename 
 49          destdir = os.path.join(dest_directory, lang, 'LC_MESSAGES') 
 50          dest = os.path.join(destdir, "%s.mo" % domain) 
 51          if not os.path.exists(dest): 
 52              if not os.path.exists(destdir): 
 53                  try: 
 54                      os.makedirs(destdir) 
 55                  except OSError, e: 
 56                      announce_func("Could not make directory %r: %r. " \ 
 57                                    "Skipped %s." % (destdir,e,dst)) 
 58                  else: 
 59                      announce_func("Compiling %s to %s" % (src, dest)) 
 60                      msgfmt.make(src, dest) 
 61   
 62          else: 
 63              src_mtime = os.stat(src)[8] 
 64              dest_mtime = os.stat(dest)[8] 
 65              if src_mtime > dest_mtime: 
 66                  announce_func("Compiling %s to %s" % (src, dest)) 
 67                  msgfmt.make(src, dest) 
 68              else: 
 69                  announce_func("Skipping already compiled %r" % dest) 
 70   
 71      return mo_files 
 72   
 73 -def get_current_locale(): 
 74      if platform.system().lower() == 'windows': 
 75          # windows hack for locale setting 
 76          default_lang, default_enc = locale.getdefaultlocale() 
 77          lang = os.getenv('LANG') 
 78          if lang is None: 
 79              lang = default_lang 
 80              os.environ['LANG'] = lang 
 81          current_locale = lang 
 82      else: 
 83          current_locale = locale.getdefaultlocale()[0] 
 84          if current_locale is None: 
 85              current_locale = os.getenv('LANG') 
 86   
 87      return current_locale 
 88   
 89 -def install_translation(plugin_name, plural = False): 
 90      log_category = 'i18n' 
 91      domain = 'elisa-plugin-%s' % plugin_name 
 92      i18n_dir = pkg_resources.resource_filename('elisa.plugins.%s' % plugin_name, 
 93                                                 'i18n') 
 94   
 95      current_locale = get_current_locale() 
 96      try: 
 97          fallback_locale = current_locale.split('_')[0] 
 98          t = gettext.translation(domain, i18n_dir, languages=[current_locale, fallback_locale]) 
 99          translator = t.ugettext 
100          translator_plural = t.ungettext 
101      except (AttributeError, IOError), error: 
102          # if the locale couldn't be determined or there's no translation for it 
103          translator = lambda string: string 
104          translator_plural = lambda singular, plural, num: num == 1 and singular or plural 
105          log.info(log_category,"Translation not found for locale %r in plugin %r", 
106                   current_locale, plugin_name) 
107      else: 
108          log.info(log_category, "Loaded translation for locale %r in plugin %r", 
109                   current_locale, plugin_name) 
110      if plural: 
111          return translator, translator_plural 
112      else: 
113          return translator 
114