282 lines
9.3 KiB
Python
282 lines
9.3 KiB
Python
import os
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import gettext as gettext_module
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from django import http
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from django.conf import settings
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from django.utils import importlib
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from django.utils.translation import check_for_language, activate, to_locale, get_language
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from django.utils.text import javascript_quote
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from django.utils.encoding import smart_unicode
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from django.utils.formats import get_format_modules
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def set_language(request):
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"""
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Redirect to a given url while setting the chosen language in the
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session or cookie. The url and the language code need to be
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specified in the request parameters.
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Since this view changes how the user will see the rest of the site, it must
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only be accessed as a POST request. If called as a GET request, it will
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redirect to the page in the request (the 'next' parameter) without changing
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any state.
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"""
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next = request.REQUEST.get('next', None)
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if not next:
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next = request.META.get('HTTP_REFERER', None)
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if not next:
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next = '/'
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response = http.HttpResponseRedirect(next)
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if request.method == 'POST':
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lang_code = request.POST.get('language', None)
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if lang_code and check_for_language(lang_code):
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if hasattr(request, 'session'):
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request.session['django_language'] = lang_code
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else:
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response.set_cookie(settings.LANGUAGE_COOKIE_NAME, lang_code)
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return response
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def get_formats():
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"""
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Returns all formats strings required for i18n to work
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"""
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FORMAT_SETTINGS = (
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'DATE_FORMAT', 'DATETIME_FORMAT', 'TIME_FORMAT',
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'YEAR_MONTH_FORMAT', 'MONTH_DAY_FORMAT', 'SHORT_DATE_FORMAT',
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'SHORT_DATETIME_FORMAT', 'FIRST_DAY_OF_WEEK', 'DECIMAL_SEPARATOR',
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'THOUSAND_SEPARATOR', 'NUMBER_GROUPING',
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'DATE_INPUT_FORMATS', 'TIME_INPUT_FORMATS', 'DATETIME_INPUT_FORMATS'
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)
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result = {}
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for module in [settings] + get_format_modules(reverse=True):
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for attr in FORMAT_SETTINGS:
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try:
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result[attr] = getattr(module, attr)
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except AttributeError:
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pass
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src = []
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for k, v in result.items():
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if isinstance(v, (basestring, int)):
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src.append("formats['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(smart_unicode(v))))
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elif isinstance(v, (tuple, list)):
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v = [javascript_quote(smart_unicode(value)) for value in v]
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src.append("formats['%s'] = ['%s'];\n" % (javascript_quote(k), "', '".join(v)))
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return ''.join(src)
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NullSource = """
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/* gettext identity library */
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function gettext(msgid) { return msgid; }
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function ngettext(singular, plural, count) { return (count == 1) ? singular : plural; }
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function gettext_noop(msgid) { return msgid; }
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function pgettext(context, msgid) { return msgid; }
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function npgettext(context, singular, plural, count) { return (count == 1) ? singular : plural; }
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"""
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LibHead = """
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/* gettext library */
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var catalog = new Array();
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"""
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LibFoot = """
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function gettext(msgid) {
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var value = catalog[msgid];
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if (typeof(value) == 'undefined') {
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return msgid;
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} else {
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return (typeof(value) == 'string') ? value : value[0];
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}
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}
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function ngettext(singular, plural, count) {
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value = catalog[singular];
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if (typeof(value) == 'undefined') {
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return (count == 1) ? singular : plural;
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} else {
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return value[pluralidx(count)];
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}
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}
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function gettext_noop(msgid) { return msgid; }
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function pgettext(context, msgid) {
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var value = gettext(context + '\x04' + msgid);
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if (value.indexOf('\x04') != -1) {
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value = msgid;
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}
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return value;
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}
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function npgettext(context, singular, plural, count) {
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var value = ngettext(context + '\x04' + singular, context + '\x04' + plural, count);
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if (value.indexOf('\x04') != -1) {
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value = ngettext(singular, plural, count);
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}
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return value;
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}
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"""
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LibFormatHead = """
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/* formatting library */
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var formats = new Array();
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"""
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LibFormatFoot = """
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function get_format(format_type) {
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var value = formats[format_type];
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if (typeof(value) == 'undefined') {
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return msgid;
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} else {
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return value;
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}
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}
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"""
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SimplePlural = """
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function pluralidx(count) { return (count == 1) ? 0 : 1; }
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"""
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InterPolate = r"""
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function interpolate(fmt, obj, named) {
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if (named) {
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return fmt.replace(/%\(\w+\)s/g, function(match){return String(obj[match.slice(2,-2)])});
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} else {
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return fmt.replace(/%s/g, function(match){return String(obj.shift())});
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}
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}
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"""
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PluralIdx = r"""
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function pluralidx(n) {
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var v=%s;
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if (typeof(v) == 'boolean') {
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return v ? 1 : 0;
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} else {
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return v;
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}
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}
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"""
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def null_javascript_catalog(request, domain=None, packages=None):
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"""
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Returns "identity" versions of the JavaScript i18n functions -- i.e.,
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versions that don't actually do anything.
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"""
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src = [NullSource, InterPolate, LibFormatHead, get_formats(), LibFormatFoot]
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return http.HttpResponse(''.join(src), 'text/javascript')
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def javascript_catalog(request, domain='djangojs', packages=None):
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"""
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Returns the selected language catalog as a javascript library.
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Receives the list of packages to check for translations in the
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packages parameter either from an infodict or as a +-delimited
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string from the request. Default is 'django.conf'.
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Additionally you can override the gettext domain for this view,
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but usually you don't want to do that, as JavaScript messages
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go to the djangojs domain. But this might be needed if you
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deliver your JavaScript source from Django templates.
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"""
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if request.GET:
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if 'language' in request.GET:
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if check_for_language(request.GET['language']):
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activate(request.GET['language'])
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if packages is None:
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packages = ['django.conf']
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if isinstance(packages, basestring):
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packages = packages.split('+')
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packages = [p for p in packages if p == 'django.conf' or p in settings.INSTALLED_APPS]
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default_locale = to_locale(settings.LANGUAGE_CODE)
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locale = to_locale(get_language())
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t = {}
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paths = []
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en_selected = locale.startswith('en')
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en_catalog_missing = True
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# first load all english languages files for defaults
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for package in packages:
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p = importlib.import_module(package)
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path = os.path.join(os.path.dirname(p.__file__), 'locale')
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paths.append(path)
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try:
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catalog = gettext_module.translation(domain, path, ['en'])
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t.update(catalog._catalog)
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except IOError:
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pass
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else:
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# 'en' is the selected language and at least one of the packages
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# listed in `packages` has an 'en' catalog
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if en_selected:
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en_catalog_missing = False
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# next load the settings.LANGUAGE_CODE translations if it isn't english
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if default_locale != 'en':
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for path in paths:
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try:
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catalog = gettext_module.translation(domain, path, [default_locale])
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except IOError:
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catalog = None
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if catalog is not None:
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t.update(catalog._catalog)
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# last load the currently selected language, if it isn't identical to the default.
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if locale != default_locale:
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# If the currently selected language is English but it doesn't have a
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# translation catalog (presumably due to being the language translated
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# from) then a wrong language catalog might have been loaded in the
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# previous step. It needs to be discarded.
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if en_selected and en_catalog_missing:
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t = {}
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else:
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locale_t = {}
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for path in paths:
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try:
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catalog = gettext_module.translation(domain, path, [locale])
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except IOError:
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catalog = None
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if catalog is not None:
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locale_t.update(catalog._catalog)
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if locale_t:
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t = locale_t
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src = [LibHead]
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plural = None
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if '' in t:
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for l in t[''].split('\n'):
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if l.startswith('Plural-Forms:'):
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plural = l.split(':',1)[1].strip()
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if plural is not None:
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# this should actually be a compiled function of a typical plural-form:
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# Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;
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plural = [el.strip() for el in plural.split(';') if el.strip().startswith('plural=')][0].split('=',1)[1]
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src.append(PluralIdx % plural)
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else:
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src.append(SimplePlural)
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csrc = []
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pdict = {}
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for k, v in t.items():
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if k == '':
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continue
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if isinstance(k, basestring):
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csrc.append("catalog['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(v)))
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elif isinstance(k, tuple):
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if k[0] not in pdict:
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pdict[k[0]] = k[1]
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else:
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pdict[k[0]] = max(k[1], pdict[k[0]])
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csrc.append("catalog['%s'][%d] = '%s';\n" % (javascript_quote(k[0]), k[1], javascript_quote(v)))
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else:
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raise TypeError(k)
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csrc.sort()
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for k, v in pdict.items():
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src.append("catalog['%s'] = [%s];\n" % (javascript_quote(k), ','.join(["''"]*(v+1))))
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src.extend(csrc)
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src.append(LibFoot)
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src.append(InterPolate)
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src.append(LibFormatHead)
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src.append(get_formats())
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src.append(LibFormatFoot)
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src = ''.join(src)
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return http.HttpResponse(src, 'text/javascript')
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