jinja2_for_django.py

"""
See http://docs.djangoproject.com/en/dev/ref/templates/api/#using-an-alternative-template-language

Use:
 * {{ url_for('view_name') }} instead of {% url view_name %},
 * <input type="hidden" name="csrfmiddlewaretoken" value="{{ csrf_token }}">
   instead of {% csrf_token %}.

"""

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

from app import jinja

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(settings.TEMPLATE_DIRS), 
        autoescape=False,extensions=['jinja2.ext.autoescape'])
    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['JQUERY_URL'] = settings.JQUERY_URL
    #env.globals['STATIC_URL'] = settings.STATIC_URL
    
    for fname in jinja.__all__:
        env.globals[fname] = getattr(jinja, fname)
        
    def format(value, format=settings.DATE_FORMAT):
        from django.utils import dateformat
        return dateformat.format(value, format)
    def time_format(value, format=settings.TIME_FORMAT):
        from django.utils import dateformat
        return dateformat.time_format(value, format)
    
    env.filters["date"] = format 
    env.filters["time"] = time_format

    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