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"""
Wrapper for loading templates from "templates" directories in panel modules.
"""
import os
from django.conf import settings
from django.template.base import TemplateDoesNotExist
from django.template.loader import BaseLoader
from django.utils._os import safe_join
# Set up a cache of the panel directories to search.
panel_template_dirs = {}
class TemplateLoader(BaseLoader):
is_usable = True
def get_template_sources(self, template_name):
bits = template_name.split(os.path.sep, 2)
if len(bits) == 3:
dash_name, panel_name, remainder = bits
key = os.path.join(dash_name, panel_name)
if key in panel_template_dirs:
template_dir = panel_template_dirs[key]
try:
yield safe_join(template_dir, panel_name, remainder)
except UnicodeDecodeError:
# The template dir name wasn't valid UTF-8.
raise
except ValueError:
# The joined path was located outside of template_dir.
pass
def load_template_source(self, template_name, template_dirs=None):
for path in self.get_template_sources(template_name):
try:
file = open(path)
try:
return (file.read().decode(settings.FILE_CHARSET), path)
finally:
file.close()
except IOError:
pass
raise TemplateDoesNotExist(template_name)
_loader = TemplateLoader()
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