"""

Internationalization support.

"""

from django.utils.encoding import force_unicode

from django.utils.functional import lazy, curry

__all__ = ['gettext', 'gettext_noop', 'gettext_lazy', 'ngettext',

        'ngettext_lazy', 'string_concat', 'activate', 'deactivate',

        'get_language', 'get_language_bidi', 'get_date_formats',

        'get_partial_date_formats', 'check_for_language', 'to_locale',

        'get_language_from_request', 'templatize', 'ugettext', 'ugettext_lazy',

        'ungettext', 'deactivate_all']

# Here be dragons, so a short explanation of the logic won't hurt:

# We are trying to solve two problems: (1) access settings, in particular

# settings.USE_I18N, as late as possible, so that modules can be imported

# without having to first configure Django, and (2) if some other code creates

# a reference to one of these functions, don't break that reference when we

# replace the functions with their real counterparts (once we do access the

# settings).

def delayed_loader(real_name, *args, **kwargs):

    """

    Call the real, underlying function.  We have a level of indirection here so

    that modules can use the translation bits without actually requiring

    Django's settings bits to be configured before import.

    """

    from django.conf import settings

    if settings.USE_I18N:

        from django.utils.translation import trans_real as trans

    else:

        from django.utils.translation import trans_null as trans

    # Make the originally requested function call on the way out the door.

    return getattr(trans, real_name)(*args, **kwargs)

g = globals()

for name in __all__:

    g['real_%s' % name] = curry(delayed_loader, name)

del g, delayed_loader

def gettext_noop(message):

    return real_gettext_noop(message)

ugettext_noop = gettext_noop

def gettext(message):

    return real_gettext(message)

def ngettext(singular, plural, number):

    return real_ngettext(singular, plural, number)

def ugettext(message):

    return real_ugettext(message)

def ungettext(singular, plural, number):

    return real_ungettext(singular, plural, number)

ngettext_lazy = lazy(ngettext, str)

gettext_lazy = lazy(gettext, str)

ungettext_lazy = lazy(ungettext, unicode)

ugettext_lazy = lazy(ugettext, unicode)

def activate(language):

    return real_activate(language)

def deactivate():

    return real_deactivate()

def get_language():

    return real_get_language()

def get_language_bidi():

    return real_get_language_bidi()

def get_date_formats():

    return real_get_date_formats()

def get_partial_date_formats():

    return real_get_partial_date_formats()

def check_for_language(lang_code):

    return real_check_for_language(lang_code)

def to_locale(language):

    return real_to_locale(language)

def get_language_from_request(request):

    return real_get_language_from_request(request)

def templatize(src):

    return real_templatize(src)

def deactivate_all():

    return real_deactivate_all()

def _string_concat(*strings):

    """

    Lazy variant of string concatenation, needed for translations that are

    constructed from multiple parts.

    """

    return u''.join([force_unicode(s) for s in strings])

string_concat = lazy(_string_concat, unicode)