app/django/utils/translation/trans_real.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Tue, 14 Oct 2008 16:00:59 +0000
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Load ../vendor/django into trunk/app/django.
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"""Translation helper functions."""
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import locale
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import os
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import re
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import sys
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import gettext as gettext_module
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from cStringIO import StringIO
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from django.utils.safestring import mark_safe, SafeData
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from django.utils.thread_support import currentThread
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# Translations are cached in a dictionary for every language+app tuple.
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# The active translations are stored by threadid to make them thread local.
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_translations = {}
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_active = {}
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# The default translation is based on the settings file.
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_default = None
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# This is a cache for normalized accept-header languages to prevent multiple
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# file lookups when checking the same locale on repeated requests.
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_accepted = {}
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# Format of Accept-Language header values. From RFC 2616, section 14.4 and 3.9.
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accept_language_re = re.compile(r'''
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        ([A-Za-z]{1,8}(?:-[A-Za-z]{1,8})*|\*)   # "en", "en-au", "x-y-z", "*"
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        (?:;q=(0(?:\.\d{,3})?|1(?:.0{,3})?))?   # Optional "q=1.00", "q=0.8"
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        (?:\s*,\s*|$)                            # Multiple accepts per header.
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        ''', re.VERBOSE)
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def to_locale(language, to_lower=False):
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    """
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    Turns a language name (en-us) into a locale name (en_US). If 'to_lower' is
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    True, the last component is lower-cased (en_us).
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    """
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    p = language.find('-')
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    if p >= 0:
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        if to_lower:
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            return language[:p].lower()+'_'+language[p+1:].lower()
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        else:
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            return language[:p].lower()+'_'+language[p+1:].upper()
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    else:
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        return language.lower()
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def to_language(locale):
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    """Turns a locale name (en_US) into a language name (en-us)."""
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    p = locale.find('_')
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    if p >= 0:
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        return locale[:p].lower()+'-'+locale[p+1:].lower()
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    else:
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        return locale.lower()
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class DjangoTranslation(gettext_module.GNUTranslations):
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    """
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    This class sets up the GNUTranslations context with regard to output
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    charset. Django uses a defined DEFAULT_CHARSET as the output charset on
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    Python 2.4. With Python 2.3, use DjangoTranslation23.
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    """
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    def __init__(self, *args, **kw):
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        from django.conf import settings
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        gettext_module.GNUTranslations.__init__(self, *args, **kw)
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        # Starting with Python 2.4, there's a function to define
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        # the output charset. Before 2.4, the output charset is
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        # identical with the translation file charset.
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        try:
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            self.set_output_charset('utf-8')
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        except AttributeError:
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            pass
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        self.django_output_charset = 'utf-8'
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        self.__language = '??'
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    def merge(self, other):
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        self._catalog.update(other._catalog)
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    def set_language(self, language):
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        self.__language = language
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    def language(self):
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        return self.__language
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    def __repr__(self):
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        return "<DjangoTranslation lang:%s>" % self.__language
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class DjangoTranslation23(DjangoTranslation):
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    """
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    Compatibility class that is only used with Python 2.3.
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    Python 2.3 doesn't support set_output_charset on translation objects and
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    needs this wrapper class to make sure input charsets from translation files
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    are correctly translated to output charsets.
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    With a full switch to Python 2.4, this can be removed from the source.
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    """
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    def gettext(self, msgid):
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        res = self.ugettext(msgid)
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        return res.encode(self.django_output_charset)
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    def ngettext(self, msgid1, msgid2, n):
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        res = self.ungettext(msgid1, msgid2, n)
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        return res.encode(self.django_output_charset)
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def translation(language):
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    """
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    Returns a translation object.
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    This translation object will be constructed out of multiple GNUTranslations
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    objects by merging their catalogs. It will construct a object for the
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    requested language and add a fallback to the default language, if it's
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    different from the requested language.
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    """
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    global _translations
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    t = _translations.get(language, None)
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    if t is not None:
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        return t
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    from django.conf import settings
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    # set up the right translation class
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    klass = DjangoTranslation
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    if sys.version_info < (2, 4):
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        klass = DjangoTranslation23
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    globalpath = os.path.join(os.path.dirname(sys.modules[settings.__module__].__file__), 'locale')
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    if settings.SETTINGS_MODULE is not None:
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        parts = settings.SETTINGS_MODULE.split('.')
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        project = __import__(parts[0], {}, {}, [])
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        projectpath = os.path.join(os.path.dirname(project.__file__), 'locale')
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    else:
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        projectpath = None
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    def _fetch(lang, fallback=None):
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        global _translations
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        loc = to_locale(lang)
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        res = _translations.get(lang, None)
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        if res is not None:
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            return res
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        def _translation(path):
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            try:
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                t = gettext_module.translation('django', path, [loc], klass)
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                t.set_language(lang)
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                return t
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            except IOError, e:
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                return None
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        res = _translation(globalpath)
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        # We want to ensure that, for example,  "en-gb" and "en-us" don't share
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        # the same translation object (thus, merging en-us with a local update
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        # doesn't affect en-gb), even though they will both use the core "en"
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        # translation. So we have to subvert Python's internal gettext caching.
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        base_lang = lambda x: x.split('-', 1)[0]
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        if base_lang(lang) in [base_lang(trans) for trans in _translations]:
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            res._info = res._info.copy()
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            res._catalog = res._catalog.copy()
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54
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        def _merge(path):
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            t = _translation(path)
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            if t is not None:
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                if res is None:
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                    return t
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                else:
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                    res.merge(t)
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            return res
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        for localepath in settings.LOCALE_PATHS:
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            if os.path.isdir(localepath):
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                res = _merge(localepath)
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        if projectpath and os.path.isdir(projectpath):
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            res = _merge(projectpath)
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        for appname in settings.INSTALLED_APPS:
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            p = appname.rfind('.')
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            if p >= 0:
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                app = getattr(__import__(appname[:p], {}, {}, [appname[p+1:]]), appname[p+1:])
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            else:
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                app = __import__(appname, {}, {}, [])
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            apppath = os.path.join(os.path.dirname(app.__file__), 'locale')
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            if os.path.isdir(apppath):
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                res = _merge(apppath)
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        if res is None:
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            if fallback is not None:
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                res = fallback
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            else:
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                return gettext_module.NullTranslations()
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        _translations[lang] = res
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        return res
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    default_translation = _fetch(settings.LANGUAGE_CODE)
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    current_translation = _fetch(language, fallback=default_translation)
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    return current_translation
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def activate(language):
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    """
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    Fetches the translation object for a given tuple of application name and
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    language and installs it as the current translation object for the current
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    thread.
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    """
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    _active[currentThread()] = translation(language)
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def deactivate():
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    """
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    Deinstalls the currently active translation object so that further _ calls
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    will resolve against the default translation object, again.
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    """
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    global _active
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    if currentThread() in _active:
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        del _active[currentThread()]
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def deactivate_all():
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    """
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    Makes the active translation object a NullTranslations() instance. This is
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    useful when we want delayed translations to appear as the original string
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    for some reason.
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    """
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    _active[currentThread()] = gettext_module.NullTranslations()
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def get_language():
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    """Returns the currently selected language."""
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    t = _active.get(currentThread(), None)
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    if t is not None:
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        try:
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            return to_language(t.language())
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        except AttributeError:
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            pass
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    # If we don't have a real translation object, assume it's the default language.
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    from django.conf import settings
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    return settings.LANGUAGE_CODE
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def get_language_bidi():
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    """
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    Returns selected language's BiDi layout.
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    False = left-to-right layout
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    True = right-to-left layout
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    """
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    from django.conf import settings
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    base_lang = get_language().split('-')[0]
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    return base_lang in settings.LANGUAGES_BIDI
54
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def catalog():
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    """
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    Returns the current active catalog for further processing.
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    This can be used if you need to modify the catalog or want to access the
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    whole message catalog instead of just translating one string.
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    """
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    global _default, _active
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    t = _active.get(currentThread(), None)
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    if t is not None:
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        return t
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    if _default is None:
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        from django.conf import settings
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        _default = translation(settings.LANGUAGE_CODE)
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    return _default
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def do_translate(message, translation_function):
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    """
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    Translates 'message' using the given 'translation_function' name -- which
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    will be either gettext or ugettext. It uses the current thread to find the
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    translation object to use. If no current translation is activated, the
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    message will be run through the default translation object.
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    """
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    global _default, _active
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    t = _active.get(currentThread(), None)
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    if t is not None:
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        result = getattr(t, translation_function)(message)
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    else:
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        if _default is None:
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            from django.conf import settings
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            _default = translation(settings.LANGUAGE_CODE)
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        result = getattr(_default, translation_function)(message)
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    if isinstance(message, SafeData):
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        return mark_safe(result)
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    return result
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def gettext(message):
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    return do_translate(message, 'gettext')
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def ugettext(message):
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    return do_translate(message, 'ugettext')
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def gettext_noop(message):
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    """
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    Marks strings for translation but doesn't translate them now. This can be
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    used to store strings in global variables that should stay in the base
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    language (because they might be used externally) and will be translated
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    later.
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    """
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    return message
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def do_ntranslate(singular, plural, number, translation_function):
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    global _default, _active
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    t = _active.get(currentThread(), None)
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    if t is not None:
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        return getattr(t, translation_function)(singular, plural, number)
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    if _default is None:
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        from django.conf import settings
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        _default = translation(settings.LANGUAGE_CODE)
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    return getattr(_default, translation_function)(singular, plural, number)
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def ngettext(singular, plural, number):
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    """
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    Returns a UTF-8 bytestring of the translation of either the singular or
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    plural, based on the number.
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    """
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    return do_ntranslate(singular, plural, number, 'ngettext')
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def ungettext(singular, plural, number):
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    """
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    Returns a unicode strings of the translation of either the singular or
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    plural, based on the number.
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    """
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    return do_ntranslate(singular, plural, number, 'ungettext')
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def check_for_language(lang_code):
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    """
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    Checks whether there is a global language file for the given language
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    code. This is used to decide whether a user-provided language is
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    available. This is only used for language codes from either the cookies or
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    session.
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    """
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    from django.conf import settings
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    globalpath = os.path.join(os.path.dirname(sys.modules[settings.__module__].__file__), 'locale')
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    if gettext_module.find('django', globalpath, [to_locale(lang_code)]) is not None:
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        return True
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    else:
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        return False
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def get_language_from_request(request):
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    """
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    Analyzes the request to find what language the user wants the system to
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    show. Only languages listed in settings.LANGUAGES are taken into account.
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    If the user requests a sublanguage where we have a main language, we send
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    out the main language.
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    """
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    global _accepted
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    from django.conf import settings
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    globalpath = os.path.join(os.path.dirname(sys.modules[settings.__module__].__file__), 'locale')
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    supported = dict(settings.LANGUAGES)
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   351
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    if hasattr(request, 'session'):
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        lang_code = request.session.get('django_language', None)
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   354
        if lang_code in supported and lang_code is not None and check_for_language(lang_code):
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            return lang_code
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   356
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    lang_code = request.COOKIES.get(settings.LANGUAGE_COOKIE_NAME)
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    if lang_code and lang_code in supported and check_for_language(lang_code):
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        return lang_code
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   360
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    accept = request.META.get('HTTP_ACCEPT_LANGUAGE', '')
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   362
    for accept_lang, unused in parse_accept_lang_header(accept):
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   363
        if accept_lang == '*':
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   364
            break
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   365
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        # We have a very restricted form for our language files (no encoding
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        # specifier, since they all must be UTF-8 and only one possible
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   368
        # language each time. So we avoid the overhead of gettext.find() and
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   369
        # work out the MO file manually.
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   370
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   371
        # 'normalized' is the root name of the locale in POSIX format (which is
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   372
        # the format used for the directories holding the MO files).
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   373
        normalized = locale.locale_alias.get(to_locale(accept_lang, True))
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   374
        if not normalized:
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   375
            continue
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   376
        # Remove the default encoding from locale_alias.
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   377
        normalized = normalized.split('.')[0]
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   378
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   379
        if normalized in _accepted:
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   380
            # We've seen this locale before and have an MO file for it, so no
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   381
            # need to check again.
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   382
            return _accepted[normalized]
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   383
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   384
        for lang, dirname in ((accept_lang, normalized),
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   385
                (accept_lang.split('-')[0], normalized.split('_')[0])):
323
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   386
            if lang.lower() not in supported:
54
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   387
                continue
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   388
            langfile = os.path.join(globalpath, dirname, 'LC_MESSAGES',
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   389
                    'django.mo')
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   390
            if os.path.exists(langfile):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   391
                _accepted[normalized] = lang
323
ff1a9aa48cfd Load ../vendor/django into trunk/app/django.
Pawel Solyga <Pawel.Solyga@gmail.com>
parents: 54
diff changeset
   392
                return lang
54
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   393
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   394
    return settings.LANGUAGE_CODE
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   395
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   396
def get_date_formats():
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   397
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   398
    Checks whether translation files provide a translation for some technical
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   399
    message ID to store date and time formats. If it doesn't contain one, the
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   400
    formats provided in the settings will be used.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   401
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   402
    from django.conf import settings
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   403
    date_format = ugettext('DATE_FORMAT')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   404
    datetime_format = ugettext('DATETIME_FORMAT')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   405
    time_format = ugettext('TIME_FORMAT')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   406
    if date_format == 'DATE_FORMAT':
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   407
        date_format = settings.DATE_FORMAT
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   408
    if datetime_format == 'DATETIME_FORMAT':
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   409
        datetime_format = settings.DATETIME_FORMAT
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   410
    if time_format == 'TIME_FORMAT':
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   411
        time_format = settings.TIME_FORMAT
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   412
    return date_format, datetime_format, time_format
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   413
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   414
def get_partial_date_formats():
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   415
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   416
    Checks whether translation files provide a translation for some technical
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   417
    message ID to store partial date formats. If it doesn't contain one, the
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   418
    formats provided in the settings will be used.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   419
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   420
    from django.conf import settings
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   421
    year_month_format = ugettext('YEAR_MONTH_FORMAT')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   422
    month_day_format = ugettext('MONTH_DAY_FORMAT')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   423
    if year_month_format == 'YEAR_MONTH_FORMAT':
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   424
        year_month_format = settings.YEAR_MONTH_FORMAT
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   425
    if month_day_format == 'MONTH_DAY_FORMAT':
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   426
        month_day_format = settings.MONTH_DAY_FORMAT
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   427
    return year_month_format, month_day_format
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   428
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   429
dot_re = re.compile(r'\S')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   430
def blankout(src, char):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   431
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   432
    Changes every non-whitespace character to the given char.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   433
    Used in the templatize function.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   434
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   435
    return dot_re.sub(char, src)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   436
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   437
inline_re = re.compile(r"""^\s*trans\s+((?:".*?")|(?:'.*?'))\s*""")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   438
block_re = re.compile(r"""^\s*blocktrans(?:\s+|$)""")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   439
endblock_re = re.compile(r"""^\s*endblocktrans$""")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   440
plural_re = re.compile(r"""^\s*plural$""")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   441
constant_re = re.compile(r"""_\(((?:".*?")|(?:'.*?'))\)""")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   442
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   443
def templatize(src):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   444
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   445
    Turns a Django template into something that is understood by xgettext. It
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   446
    does so by translating the Django translation tags into standard gettext
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   447
    function invocations.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   448
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   449
    from django.template import Lexer, TOKEN_TEXT, TOKEN_VAR, TOKEN_BLOCK
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   450
    out = StringIO()
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   451
    intrans = False
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   452
    inplural = False
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   453
    singular = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   454
    plural = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   455
    for t in Lexer(src, None).tokenize():
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   456
        if intrans:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   457
            if t.token_type == TOKEN_BLOCK:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   458
                endbmatch = endblock_re.match(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   459
                pluralmatch = plural_re.match(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   460
                if endbmatch:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   461
                    if inplural:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   462
                        out.write(' ngettext(%r,%r,count) ' % (''.join(singular), ''.join(plural)))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   463
                        for part in singular:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   464
                            out.write(blankout(part, 'S'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   465
                        for part in plural:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   466
                            out.write(blankout(part, 'P'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   467
                    else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   468
                        out.write(' gettext(%r) ' % ''.join(singular))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   469
                        for part in singular:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   470
                            out.write(blankout(part, 'S'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   471
                    intrans = False
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   472
                    inplural = False
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   473
                    singular = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   474
                    plural = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   475
                elif pluralmatch:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   476
                    inplural = True
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   477
                else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   478
                    raise SyntaxError("Translation blocks must not include other block tags: %s" % t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   479
            elif t.token_type == TOKEN_VAR:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   480
                if inplural:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   481
                    plural.append('%%(%s)s' % t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   482
                else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   483
                    singular.append('%%(%s)s' % t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   484
            elif t.token_type == TOKEN_TEXT:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   485
                if inplural:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   486
                    plural.append(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   487
                else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   488
                    singular.append(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   489
        else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   490
            if t.token_type == TOKEN_BLOCK:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   491
                imatch = inline_re.match(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   492
                bmatch = block_re.match(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   493
                cmatches = constant_re.findall(t.contents)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   494
                if imatch:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   495
                    g = imatch.group(1)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   496
                    if g[0] == '"': g = g.strip('"')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   497
                    elif g[0] == "'": g = g.strip("'")
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   498
                    out.write(' gettext(%r) ' % g)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   499
                elif bmatch:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   500
                    for fmatch in constant_re.findall(t.contents):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   501
                        out.write(' _(%s) ' % fmatch)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   502
                    intrans = True
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   503
                    inplural = False
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   504
                    singular = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   505
                    plural = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   506
                elif cmatches:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   507
                    for cmatch in cmatches:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   508
                        out.write(' _(%s) ' % cmatch)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   509
                else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   510
                    out.write(blankout(t.contents, 'B'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   511
            elif t.token_type == TOKEN_VAR:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   512
                parts = t.contents.split('|')
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   513
                cmatch = constant_re.match(parts[0])
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   514
                if cmatch:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   515
                    out.write(' _(%s) ' % cmatch.group(1))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   516
                for p in parts[1:]:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   517
                    if p.find(':_(') >= 0:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   518
                        out.write(' %s ' % p.split(':',1)[1])
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   519
                    else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   520
                        out.write(blankout(p, 'F'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   521
            else:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   522
                out.write(blankout(t.contents, 'X'))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   523
    return out.getvalue()
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   524
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   525
def parse_accept_lang_header(lang_string):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   526
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   527
    Parses the lang_string, which is the body of an HTTP Accept-Language
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   528
    header, and returns a list of (lang, q-value), ordered by 'q' values.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   529
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   530
    Any format errors in lang_string results in an empty list being returned.
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   531
    """
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   532
    result = []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   533
    pieces = accept_language_re.split(lang_string)
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   534
    if pieces[-1]:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   535
        return []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   536
    for i in range(0, len(pieces) - 1, 3):
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   537
        first, lang, priority = pieces[i : i + 3]
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   538
        if first:
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   539
            return []
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   540
        priority = priority and float(priority) or 1.0
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   541
        result.append((lang, priority))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   542
    result.sort(lambda x, y: -cmp(x[1], y[1]))
03e267d67478 Major reorganization of the soc svn repo, to merge into a single App Engine
Todd Larsen <tlarsen@google.com>
parents:
diff changeset
   543
    return result