fnpdjango/templatetags/fnp_lang.py

   1 from django.conf import settings
   2 from django.core.urlresolvers import resolve, reverse, Resolver404
   3 from django import template
   4 from django.utils import translation
   5 from ..utils.views import get_current_object
   6
   7 register = template.Library()
   8
   9
  10 @register.inclusion_tag('fnpdjango/lang_switcher.html', takes_context=True)
  11 def lang_switcher(context):
  12     """Context-aware language switcher.
  13
  14     Use ..utils.views.set_current_object to provide the context.
  15     """
  16     request = context['request']
  17     obj = get_current_object(request)
  18     languages = settings.LANGUAGES
  19     if hasattr(obj, 'get_available_languages'):
  20         available_languages = set(obj.get_available_languages())
  21         languages = [lang for lang in languages if lang[0] in available_languages]
  22     return {
  23         'request': request,
  24         'languages': languages,
  25     }
  26
  27
  28 @register.filter
  29 def get_here_url(request, lang):
  30     obj = get_current_object(request, for_url=True)
  31     if hasattr(obj, 'get_absolute_url'):
  32         with translation.override(lang):
  33             url = obj.get_absolute_url()
  34     else:
  35         try:
  36             match = resolve(request.get_full_path())
  37         except Resolver404:
  38             return None
  39         view = match.url_name
  40         if view is None:
  41             view = match.func
  42         if lang is None:
  43             lang = translation.get_language()
  44         with translation.override(lang):
  45             try:
  46                 url = reverse(view, args=match.args, kwargs=match.kwargs)
  47             except Resolver404:
  48                 return None
  49     return url
  50
  51