47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
from django.template.base import Template, TemplateDoesNotExist
|
|
|
|
|
|
class Loader(object):
|
|
# Only used to raise a deprecation warning. Remove in Django 2.0.
|
|
_accepts_engine_in_init = True
|
|
|
|
def __init__(self, engine):
|
|
self.engine = engine
|
|
|
|
def __call__(self, template_name, template_dirs=None):
|
|
return self.load_template(template_name, template_dirs)
|
|
|
|
def load_template(self, template_name, template_dirs=None):
|
|
source, display_name = self.load_template_source(
|
|
template_name, template_dirs)
|
|
origin = self.engine.make_origin(
|
|
display_name, self.load_template_source,
|
|
template_name, template_dirs)
|
|
|
|
try:
|
|
template = Template(source, origin, template_name, self.engine)
|
|
except TemplateDoesNotExist:
|
|
# If compiling the template we found raises TemplateDoesNotExist,
|
|
# back off to returning the source and display name for the
|
|
# template we were asked to load. This allows for correct
|
|
# identification of the actual template that does not exist.
|
|
return source, display_name
|
|
else:
|
|
return template, None
|
|
|
|
def load_template_source(self, template_name, template_dirs=None):
|
|
"""
|
|
Returns a tuple containing the source and origin for the given
|
|
template name.
|
|
"""
|
|
raise NotImplementedError(
|
|
"subclasses of Loader must provide "
|
|
"a load_template_source() method")
|
|
|
|
def reset(self):
|
|
"""
|
|
Resets any state maintained by the loader instance (e.g. cached
|
|
templates or cached loader modules).
|
|
"""
|
|
pass
|