66 lines
2.2 KiB
Python
66 lines
2.2 KiB
Python
# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""
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Wrapper for loading templates from "templates" directories in panel modules.
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"""
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import io
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import os
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import django
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from django.conf import settings
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from django.template.engine import Engine
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from django.template.loaders.base import Loader as tLoaderCls
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from django.utils._os import safe_join
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if django.VERSION >= (1, 9):
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from django.template.exceptions import TemplateDoesNotExist
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else:
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from django.template.base import TemplateDoesNotExist
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# Set up a cache of the panel directories to search.
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panel_template_dirs = {}
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class TemplateLoader(tLoaderCls):
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is_usable = True
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def get_template_sources(self, template_name):
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bits = template_name.split('/', 2)
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if len(bits) == 3:
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dash_name, panel_name, remainder = bits
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key = os.path.join(dash_name, panel_name)
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if key in panel_template_dirs:
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template_dir = panel_template_dirs[key]
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try:
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yield safe_join(template_dir, panel_name, remainder)
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except UnicodeDecodeError:
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# The template dir name wasn't valid UTF-8.
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raise
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except ValueError:
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# The joined path was located outside of template_dir.
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pass
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def load_template_source(self, template_name, template_dirs=None):
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for path in self.get_template_sources(template_name):
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try:
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with io.open(path, encoding=settings.FILE_CHARSET) as file:
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return (file.read(), path)
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except IOError:
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pass
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raise TemplateDoesNotExist(template_name)
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e = Engine()
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_loader = TemplateLoader(e)
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