| from django import http |
| from django.utils.translation import check_for_language, activate, to_locale, get_language |
| from django.utils.text import javascript_quote |
| from django.conf import settings |
| import os |
| import gettext as gettext_module |
| |
| def set_language(request): |
| """ |
| Redirect to a given url while setting the chosen language in the |
| session or cookie. The url and the language code need to be |
| specified in the request parameters. |
| |
| Since this view changes how the user will see the rest of the site, it must |
| only be accessed as a POST request. If called as a GET request, it will |
| redirect to the page in the request (the 'next' parameter) without changing |
| any state. |
| """ |
| next = request.REQUEST.get('next', None) |
| if not next: |
| next = request.META.get('HTTP_REFERER', None) |
| if not next: |
| next = '/' |
| response = http.HttpResponseRedirect(next) |
| if request.method == 'POST': |
| lang_code = request.POST.get('language', None) |
| if lang_code and check_for_language(lang_code): |
| if hasattr(request, 'session'): |
| request.session['django_language'] = lang_code |
| else: |
| response.set_cookie(settings.LANGUAGE_COOKIE_NAME, lang_code) |
| return response |
| |
| NullSource = """ |
| /* gettext identity library */ |
| |
| function gettext(msgid) { return msgid; } |
| function ngettext(singular, plural, count) { return (count == 1) ? singular : plural; } |
| function gettext_noop(msgid) { return msgid; } |
| """ |
| |
| LibHead = """ |
| /* gettext library */ |
| |
| var catalog = new Array(); |
| """ |
| |
| LibFoot = """ |
| |
| function gettext(msgid) { |
| var value = catalog[msgid]; |
| if (typeof(value) == 'undefined') { |
| return msgid; |
| } else { |
| return (typeof(value) == 'string') ? value : value[0]; |
| } |
| } |
| |
| function ngettext(singular, plural, count) { |
| value = catalog[singular]; |
| if (typeof(value) == 'undefined') { |
| return (count == 1) ? singular : plural; |
| } else { |
| return value[pluralidx(count)]; |
| } |
| } |
| |
| function gettext_noop(msgid) { return msgid; } |
| """ |
| |
| SimplePlural = """ |
| function pluralidx(count) { return (count == 1) ? 0 : 1; } |
| """ |
| |
| InterPolate = r""" |
| function interpolate(fmt, obj, named) { |
| if (named) { |
| return fmt.replace(/%\(\w+\)s/g, function(match){return String(obj[match.slice(2,-2)])}); |
| } else { |
| return fmt.replace(/%s/g, function(match){return String(obj.shift())}); |
| } |
| } |
| """ |
| |
| PluralIdx = r""" |
| function pluralidx(n) { |
| var v=%s; |
| if (typeof(v) == 'boolean') { |
| return v ? 1 : 0; |
| } else { |
| return v; |
| } |
| } |
| """ |
| |
| def null_javascript_catalog(request, domain=None, packages=None): |
| """ |
| Returns "identity" versions of the JavaScript i18n functions -- i.e., |
| versions that don't actually do anything. |
| """ |
| return http.HttpResponse(NullSource + InterPolate, 'text/javascript') |
| |
| def javascript_catalog(request, domain='djangojs', packages=None): |
| """ |
| Returns the selected language catalog as a javascript library. |
| |
| Receives the list of packages to check for translations in the |
| packages parameter either from an infodict or as a +-delimited |
| string from the request. Default is 'django.conf'. |
| |
| Additionally you can override the gettext domain for this view, |
| but usually you don't want to do that, as JavaScript messages |
| go to the djangojs domain. But this might be needed if you |
| deliver your JavaScript source from Django templates. |
| """ |
| if request.GET: |
| if 'language' in request.GET: |
| if check_for_language(request.GET['language']): |
| activate(request.GET['language']) |
| if packages is None: |
| packages = ['django.conf'] |
| if type(packages) in (str, unicode): |
| packages = packages.split('+') |
| packages = [p for p in packages if p == 'django.conf' or p in settings.INSTALLED_APPS] |
| default_locale = to_locale(settings.LANGUAGE_CODE) |
| locale = to_locale(get_language()) |
| t = {} |
| paths = [] |
| # first load all english languages files for defaults |
| for package in packages: |
| p = __import__(package, {}, {}, ['']) |
| path = os.path.join(os.path.dirname(p.__file__), 'locale') |
| paths.append(path) |
| try: |
| catalog = gettext_module.translation(domain, path, ['en']) |
| t.update(catalog._catalog) |
| except IOError: |
| # 'en' catalog was missing. This is harmless. |
| pass |
| # next load the settings.LANGUAGE_CODE translations if it isn't english |
| if default_locale != 'en': |
| for path in paths: |
| try: |
| catalog = gettext_module.translation(domain, path, [default_locale]) |
| except IOError: |
| catalog = None |
| if catalog is not None: |
| t.update(catalog._catalog) |
| # last load the currently selected language, if it isn't identical to the default. |
| if locale != default_locale: |
| for path in paths: |
| try: |
| catalog = gettext_module.translation(domain, path, [locale]) |
| except IOError: |
| catalog = None |
| if catalog is not None: |
| t.update(catalog._catalog) |
| src = [LibHead] |
| plural = None |
| if '' in t: |
| for l in t[''].split('\n'): |
| if l.startswith('Plural-Forms:'): |
| plural = l.split(':',1)[1].strip() |
| if plural is not None: |
| # this should actually be a compiled function of a typical plural-form: |
| # 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; |
| plural = [el.strip() for el in plural.split(';') if el.strip().startswith('plural=')][0].split('=',1)[1] |
| src.append(PluralIdx % plural) |
| else: |
| src.append(SimplePlural) |
| csrc = [] |
| pdict = {} |
| for k, v in t.items(): |
| if k == '': |
| continue |
| if type(k) in (str, unicode): |
| csrc.append("catalog['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(v))) |
| elif type(k) == tuple: |
| if k[0] not in pdict: |
| pdict[k[0]] = k[1] |
| else: |
| pdict[k[0]] = max(k[1], pdict[k[0]]) |
| csrc.append("catalog['%s'][%d] = '%s';\n" % (javascript_quote(k[0]), k[1], javascript_quote(v))) |
| else: |
| raise TypeError, k |
| csrc.sort() |
| for k,v in pdict.items(): |
| src.append("catalog['%s'] = [%s];\n" % (javascript_quote(k), ','.join(["''"]*(v+1)))) |
| src.extend(csrc) |
| src.append(LibFoot) |
| src.append(InterPolate) |
| src = ''.join(src) |
| return http.HttpResponse(src, 'text/javascript') |
