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"""

A Jinja2 template loader for Django 1.2+
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Add the following to your settings.py file. (The comma is important!)

TEMPLATE_LOADERS = ('jinja2_for_django.Loader',)

Now use your templates as usual (with render_to_response, generic views or
anything else that uses Django templates), and they will actually be
rendered by Jinja2.
See http://exyr.org/2010/Jinja-in-Django/
Author: Simon Sapin
License: BSD

"""

from django.template.loader import BaseLoader
from django.template.loaders.app_directories import app_template_dirs
from django.template import TemplateDoesNotExist
from django.core import urlresolvers
from django.conf import settings
import jinja2

class Template(jinja2.Template):
    def render(self, context):
        # flatten the Django Context into a single dictionary.
        context_dict = {}
        for d in context.dicts:
            context_dict.update(d)
        return super(Template, self).render(context_dict)

class Loader(BaseLoader):
    is_usable = True

    env = jinja2.Environment(loader=jinja2.FileSystemLoader(app_template_dirs))
    env.template_class = Template

    # These are available to all templates.
    env.globals['url_for'] = urlresolvers.reverse
    env.globals['MEDIA_URL'] = settings.MEDIA_URL
    #env.globals['STATIC_URL'] = settings.STATIC_URL

    def load_template(self, template_name, template_dirs=None):
        try:
            template = self.env.get_template(template_name)
        except jinja2.TemplateNotFound:
            raise TemplateDoesNotExist(template_name)
        return template, template.filename

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