72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
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import os
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from django.conf import settings
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from django.template.backends.django import DjangoTemplates
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from django.template.loader import get_template
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from django.utils import lru_cache
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from django.utils._os import upath
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from django.utils.functional import cached_property
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from django.utils.module_loading import import_string
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try:
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from django.template.backends.jinja2 import Jinja2
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except ImportError:
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def Jinja2(params):
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raise ImportError("jinja2 isn't installed")
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ROOT = upath(os.path.dirname(__file__))
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@lru_cache.lru_cache()
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def get_default_renderer():
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renderer_class = import_string(settings.FORM_RENDERER)
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return renderer_class()
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class BaseRenderer(object):
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def get_template(self, template_name):
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raise NotImplementedError('subclasses must implement get_template()')
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def render(self, template_name, context, request=None):
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template = self.get_template(template_name)
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return template.render(context, request=request).strip()
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class EngineMixin(object):
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def get_template(self, template_name):
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return self.engine.get_template(template_name)
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@cached_property
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def engine(self):
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return self.backend({
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'APP_DIRS': True,
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'DIRS': [os.path.join(ROOT, self.backend.app_dirname)],
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'NAME': 'djangoforms',
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'OPTIONS': {},
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})
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class DjangoTemplates(EngineMixin, BaseRenderer):
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"""
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Load Django templates from the built-in widget templates in
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django/forms/templates and from apps' 'templates' directory.
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"""
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backend = DjangoTemplates
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class Jinja2(EngineMixin, BaseRenderer):
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"""
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Load Jinja2 templates from the built-in widget templates in
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django/forms/jinja2 and from apps' 'jinja2' directory.
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"""
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backend = Jinja2
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class TemplatesSetting(BaseRenderer):
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"""
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Load templates using template.loader.get_template() which is configured
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based on settings.TEMPLATES.
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"""
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def get_template(self, template_name):
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return get_template(template_name)
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