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193 lines
6.4 KiB
193 lines
6.4 KiB
from django import http |
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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.conf import settings |
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import os |
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import gettext as gettext_module |
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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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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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""" |
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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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""" |
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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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return http.HttpResponse(NullSource + InterPolate, '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 type(packages) in (str, unicode): |
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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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# first load all english languages files for defaults |
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for package in packages: |
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p = __import__(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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# 'en' catalog was missing. This is harmless. |
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pass |
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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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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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t.update(catalog._catalog) |
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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 type(k) in (str, unicode): |
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csrc.append("catalog['%s'] = '%s';\n" % (javascript_quote(k), javascript_quote(v))) |
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elif type(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 = ''.join(src) |
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return http.HttpResponse(src, 'text/javascript')
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