author | Lennard de Rijk <ljvderijk@gmail.com> |
Thu, 30 Jul 2009 09:43:15 +0200 | |
changeset 2687 | 1e2bcc7f6d3a |
parent 323 | ff1a9aa48cfd |
permissions | -rw-r--r-- |
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""" |
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Internationalization support. |
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""" |
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from django.utils.functional import lazy |
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from django.utils.encoding import force_unicode |
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|
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__all__ = ['gettext', 'gettext_noop', 'gettext_lazy', 'ngettext', |
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'ngettext_lazy', 'string_concat', 'activate', 'deactivate', |
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'get_language', 'get_language_bidi', 'get_date_formats', |
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'get_partial_date_formats', 'check_for_language', 'to_locale', |
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'get_language_from_request', 'templatize', 'ugettext', 'ugettext_lazy', |
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'ungettext', 'deactivate_all'] |
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|
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# Here be dragons, so a short explanation of the logic won't hurt: |
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# We are trying to solve two problems: (1) access settings, in particular |
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# settings.USE_I18N, as late as possible, so that modules can be imported |
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# without having to first configure Django, and (2) if some other code creates |
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# a reference to one of these functions, don't break that reference when we |
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# replace the functions with their real counterparts (once we do access the |
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# settings). |
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|
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def delayed_loader(*args, **kwargs): |
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""" |
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Replace each real_* function with the corresponding function from either |
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trans_real or trans_null (e.g. real_gettext is replaced with |
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trans_real.gettext or trans_null.gettext). This function is run once, the |
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first time any i18n method is called. It replaces all the i18n methods at |
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once at that time. |
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""" |
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import traceback |
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from django.conf import settings |
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if settings.USE_I18N: |
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import trans_real as trans |
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else: |
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import trans_null as trans |
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caller = traceback.extract_stack(limit=2)[0][2] |
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g = globals() |
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for name in __all__: |
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if hasattr(trans, name): |
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g['real_%s' % name] = getattr(trans, name) |
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|
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# Make the originally requested function call on the way out the door. |
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return g['real_%s' % caller](*args, **kwargs) |
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|
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g = globals() |
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for name in __all__: |
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g['real_%s' % name] = delayed_loader |
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del g, delayed_loader |
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|
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def gettext_noop(message): |
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return real_gettext_noop(message) |
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|
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ugettext_noop = gettext_noop |
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def gettext(message): |
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return real_gettext(message) |
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|
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def ngettext(singular, plural, number): |
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return real_ngettext(singular, plural, number) |
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|
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def ugettext(message): |
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return real_ugettext(message) |
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def ungettext(singular, plural, number): |
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return real_ungettext(singular, plural, number) |
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ngettext_lazy = lazy(ngettext, str) |
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gettext_lazy = lazy(gettext, str) |
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ungettext_lazy = lazy(ungettext, unicode) |
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ugettext_lazy = lazy(ugettext, unicode) |
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def activate(language): |
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return real_activate(language) |
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def deactivate(): |
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return real_deactivate() |
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def get_language(): |
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return real_get_language() |
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def get_language_bidi(): |
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return real_get_language_bidi() |
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def get_date_formats(): |
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return real_get_date_formats() |
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def get_partial_date_formats(): |
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return real_get_partial_date_formats() |
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def check_for_language(lang_code): |
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return real_check_for_language(lang_code) |
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def to_locale(language): |
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return real_to_locale(language) |
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def get_language_from_request(request): |
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return real_get_language_from_request(request) |
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def templatize(src): |
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return real_templatize(src) |
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def deactivate_all(): |
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return real_deactivate_all() |
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def string_concat(*strings): |
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""" |
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Lazy variant of string concatenation, needed for translations that are |
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constructed from multiple parts. |
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""" |
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return u''.join([force_unicode(s) for s in strings]) |
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string_concat = lazy(string_concat, unicode) |