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Diffstat (limited to 'src/sugar/activity/i18n.py')
-rw-r--r-- | src/sugar/activity/i18n.py | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/src/sugar/activity/i18n.py b/src/sugar/activity/i18n.py new file mode 100644 index 0000000..0963ffa --- /dev/null +++ b/src/sugar/activity/i18n.py @@ -0,0 +1,134 @@ +# Copyright (C) 2010 One Laptop Per Child +# +# Author: Sayamindu Dasgupta <sayamindu@laptop.org> +# +# This library is free software; you can redistribute it and/or +# modify it under the terms of the GNU Lesser General Public +# License as published by the Free Software Foundation; either +# version 2 of the License, or (at your option) any later version. +# +# This library 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 +# Lesser General Public License for more details. +# +# You should have received a copy of the GNU Lesser General Public +# License along with this library; if not, write to the +# Free Software Foundation, Inc., 59 Temple Place - Suite 330, +# Boston, MA 02111-1307, USA. + +import gconf + +import locale +import os +import struct +import sys + +import dateutil.parser +import time + +_MO_BIG_ENDIAN = 0xde120495 +_MO_LITTLE_ENDIAN = 0x950412de + +def _readbin(handle, fmt, bytecount): + read_bytes = handle.read(bytecount) + retvalue = struct.unpack(fmt, read_bytes) + if len(retvalue) == 1: + return retvalue[0] + else: + return retvalue + +def _extract_header(filepath): + header = '' + handle = open(filepath, 'rb') + magic_number = _readbin(handle, '<I', 4) + + if magic_number == _MO_BIG_ENDIAN: + fmt = '>II' + elif magic_number == _MO_LITTLE_ENDIAN: + fmt = '<II' + else: + raise IOError ('File does not seem to be valid MO file') + + version, numofstrings = _readbin(handle, fmt, 8) + + msgids_hash_offset, msgstrs_hash_offset = _readbin(handle, fmt, 8) + handle.seek(msgids_hash_offset) + + msgids_index = [] + for i in range(numofstrings): + msgids_index.append(_readbin(handle, fmt, 8)) + handle.seek(msgstrs_hash_offset) + + msgstrs_index = [] + for i in range(numofstrings): + msgstrs_index.append(_readbin(handle, fmt, 8)) + + for i in range(numofstrings): + handle.seek(msgids_index[i][1]) + msgid = handle.read(msgids_index[i][0]) + if msgid == '': + handle.seek(msgstrs_index[i][1]) + msgstr = handle.read(msgstrs_index[i][0]) + header = msgstr + break + else: + continue + + handle.close() + return header + +def _extract_modification_time(filepath): + header = _extract_header(filepath) + items = header.split('\n') + for item in items: + if item.startswith('PO-Revision-Date:'): + timestr = item.split(': ')[1] + parsedtime = dateutil.parser.parse(timestr) + return time.mktime(parsedtime.timetuple()) + + raise ValueError ('Could not find revision date') + return -1 + + +def get_locale_path(bundle_id): + """ Gets the locale path, the directory where the preferred + MO file is located. + The preferred MO file is the one with the latest + translation. + """ + + # Note: We pre-assign weights to the directories so that if no translations + # exist, the appropriate fallbacks (eg: bn for bn_BD) can be loaded + # The directory with the highest weight is returned, and if a MO file is + # found, the weight of the directory is set to the MO's modification time + # (as described in the MO header, and _not_ the filesystem mtime) + + candidate_dirs = {} + + if 'SUGAR_LOCALEDIR' in os.environ: + candidate_dirs[os.environ['SUGAR_LOCALEDIR']] = 2 + + gconf_client = gconf.client_get_default() + packdir = gconf_client.get_string("/desktop/sugar/i18n/langpackdir") + if packdir is not None or packdir is not '': + candidate_dirs[packdir] = 1 + + candidate_dirs[os.path.join(sys.prefix, 'share', 'locale')] = 0 + + for candidate_dir in candidate_dirs.keys(): + if os.path.exists(candidate_dir): + fullpath = os.path.join(candidate_dir, \ + locale.getdefaultlocale()[0], 'LC_MESSAGES', \ + bundle_id + '.mo') + if os.path.exists(fullpath): + try: + candidate_dirs[candidate_dir] = \ + _extract_modification_time(fullpath) + except (IOError, ValueError): + # The mo file is damaged or has not been initialized + # Set lowest priority + candidate_dirs[candidate_dir] = -1 + + return sorted(candidate_dirs.iteritems(), key=lambda (k, v): (v, k), \ + reverse = True)[0][0] |