# i18n.py - internationalization support for mercurial

#

# Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

import encoding

import gettext, sys, os

# modelled after templater.templatepath:

if getattr(sys, 'frozen', None) is not None:

    module = sys.executable

else:

    module = __file__

base = os.path.dirname(module)

for dir in ('.', '..'):

    localedir = os.path.join(base, dir, 'locale')

    if os.path.isdir(localedir):

        break

t = gettext.translation('hg', localedir, fallback=True)

def gettext(message):

    """Translate message.

    The message is looked up in the catalog to get a Unicode string,

    which is encoded in the local encoding before being returned.

    Important: message is restricted to characters in the encoding

    given by sys.getdefaultencoding() which is most likely 'ascii'.

    """

    # If message is None, t.ugettext will return u'None' as the

    # translation whereas our callers expect us to return None.

    if message is None:

        return message

    paragraphs = message.split('\n\n')

    # Be careful not to translate the empty string -- it holds the

    # meta data of the .po file.

    u = u'\n\n'.join([p and t.ugettext(p) or '' for p in paragraphs])

    try:

        # encoding.tolocal cannot be used since it will first try to

        # decode the Unicode string. Calling u.decode(enc) really

        # means u.encode(sys.getdefaultencoding()).decode(enc). Since

        # the Python encoding defaults to 'ascii', this fails if the

        # translated string use non-ASCII characters.

        return u.encode(encoding.encoding, "replace")

    except LookupError:

        # An unknown encoding results in a LookupError.

        return message

def _plain():

    if 'HGPLAIN' not in os.environ and 'HGPLAINEXCEPT' not in os.environ:

        return False

    exceptions = os.environ.get('HGPLAINEXCEPT', '').strip().split(',')

    return 'i18n' not in exceptions

if _plain():

    _ = lambda message: message

else:

    _ = gettext