91 lines
3.0 KiB
Python
91 lines
3.0 KiB
Python
# DistUpgradeGettext.py - safe wrapper around gettext
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#
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# Copyright (c) 2008 Canonical
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#
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# Author: Michael Vogt <michael.vogt@ubuntu.com>
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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# USA
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import logging
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import gettext as mygettext
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_gettext_method = "gettext"
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_ngettext_method = "ngettext"
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def _verify(message, translated):
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"""
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helper that verifies that the message and the translated
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message have the same number (and type) of % args
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"""
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arguments_in_message = message.count("%") - message.count("\%")
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arguments_in_translation = translated.count("%") - translated.count("\%")
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return arguments_in_message == arguments_in_translation
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_translation_singleton = None
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def _translation():
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"""Return a suitable gettext.*Translations instance."""
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global _translation_singleton
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if _translation_singleton is None:
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domain = mygettext.textdomain()
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_translation_singleton = mygettext.translation(
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domain, mygettext.bindtextdomain(domain), fallback=True)
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return _translation_singleton
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def unicode_gettext(translation, message):
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return getattr(translation, _gettext_method)(message)
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def unicode_ngettext(translation, singular, plural, n):
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return getattr(translation, _ngettext_method)(singular, plural, n)
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def gettext(message):
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"""
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version of gettext that logs errors but does not crash on incorrect
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number of arguments
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"""
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if message == "":
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return ""
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translated_msg = unicode_gettext(_translation(), message)
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if not _verify(message, translated_msg):
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logging.error(
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"incorrect translation for message '%s' to '%s' "
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"(wrong number of arguments)" % (message, translated_msg))
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return message
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return translated_msg
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def ngettext(msgid1, msgid2, n):
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"""
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version of ngettext that logs errors but does not crash on incorrect
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number of arguments
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"""
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translated_msg = unicode_ngettext(_translation(), msgid1, msgid2, n)
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if not _verify(msgid1, translated_msg):
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logging.error(
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"incorrect translation for ngettext message "
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"'%s' plural: '%s' to '%s' (wrong number of arguments)" % (
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msgid1, msgid2, translated_msg))
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# dumb fallback to not crash
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if n == 1:
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return msgid1
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return msgid2
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return translated_msg
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