| """ |
| Internationalization support. |
| """ |
| from django.utils.functional import lazy |
| from django.utils.encoding import force_unicode |
| |
| __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', |
| '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(*args, **kwargs): |
| """ |
| Replace each real_* function with the corresponding function from either |
| trans_real or trans_null (e.g. real_gettext is replaced with |
| trans_real.gettext or trans_null.gettext). This function is run once, the |
| first time any i18n method is called. It replaces all the i18n methods at |
| once at that time. |
| """ |
| import traceback |
| from django.conf import settings |
| if settings.USE_I18N: |
| import trans_real as trans |
| else: |
| import trans_null as trans |
| caller = traceback.extract_stack(limit=2)[0][2] |
| g = globals() |
| for name in __all__: |
| if hasattr(trans, name): |
| g['real_%s' % name] = getattr(trans, name) |
| |
| # Make the originally requested function call on the way out the door. |
| return g['real_%s' % caller](*args, **kwargs) |
| |
| g = globals() |
| for name in __all__: |
| g['real_%s' % name] = delayed_loader |
| 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) |