django1/django/core/context_processors.py

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"""
A set of request processors that return dictionaries to be merged into a
template context. Each function takes the request object as its only parameter
and returns a dictionary to add to the context.
These are referenced from the setting TEMPLATE_CONTEXT_PROCESSORS and used by
DjangoContext.
"""
from django.conf.settings import DEBUG, INTERNAL_IPS, LANGUAGES, LANGUAGE_CODE
def auth(request):
"""
Returns context variables required by apps that use Django's authentication
system.
"""
return {
'user': request.user,
'messages': request.user.get_and_delete_messages(),
'perms': PermWrapper(request.user),
}
def debug(request):
"Returns context variables helpful for debugging."
context_extras = {}
if DEBUG and request.META.get('REMOTE_ADDR') in INTERNAL_IPS:
context_extras['debug'] = True
from django.core import db
context_extras['sql_queries'] = db.db.queries
return context_extras
def i18n(request):
context_extras = {}
context_extras['LANGUAGES'] = LANGUAGES
if hasattr(request, 'LANGUAGE_CODE'):
context_extras['LANGUAGE_CODE'] = request.LANGUAGE_CODE
else:
context_extras['LANGUAGE_CODE'] = LANGUAGE_CODE
return context_extras
# PermWrapper and PermLookupDict proxy the permissions system into objects that
# the template system can understand.
class PermLookupDict:
def __init__(self, user, module_name):
self.user, self.module_name = user, module_name
def __repr__(self):
return str(self.user.get_permission_list())
def __getitem__(self, perm_name):
return self.user.has_perm("%s.%s" % (self.module_name, perm_name))
def __nonzero__(self):
return self.user.has_module_perms(self.module_name)
class PermWrapper:
def __init__(self, user):
self.user = user
def __getitem__(self, module_name):
return PermLookupDict(self.user, module_name)