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edx-platform/common/djangoapps/mitxmako/template.py

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Python

# Copyright (c) 2008 Mikeal Rogers
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from django.conf import settings
from mako.template import Template as MakoTemplate
from mitxmako.shortcuts import marketing_link
import mitxmako
import mitxmako.middleware
django_variables = ['lookup', 'output_encoding', 'encoding_errors']
# TODO: We should make this a Django Template subclass that simply has the MakoTemplate inside of it? (Intead of inheriting from MakoTemplate)
class Template(MakoTemplate):
"""
This bridges the gap between a Mako template and a djano template. It can
be rendered like it is a django template because the arguments are transformed
in a way that MakoTemplate can understand.
"""
def __init__(self, *args, **kwargs):
"""Overrides base __init__ to provide django variable overrides"""
if not kwargs.get('no_django', False):
overrides = dict([(k, getattr(mitxmako, k, None),) for k in django_variables])
overrides['lookup'] = overrides['lookup']['main']
kwargs.update(overrides)
super(Template, self).__init__(*args, **kwargs)
def render(self, context_instance):
"""
This takes a render call with a context (from Django) and translates
it to a render call on the mako template.
"""
# collapse context_instance to a single dictionary for mako
context_dictionary = {}
# In various testing contexts, there might not be a current request context.
if mitxmako.middleware.requestcontext is not None:
for d in mitxmako.middleware.requestcontext:
context_dictionary.update(d)
for d in context_instance:
context_dictionary.update(d)
context_dictionary['settings'] = settings
context_dictionary['MITX_ROOT_URL'] = settings.MITX_ROOT_URL
context_dictionary['django_context'] = context_instance
context_dictionary['marketing_link'] = marketing_link
return super(Template, self).render_unicode(**context_dictionary)