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from os.path import normpath
from pprint import pformat
from django import http
from django.conf import settings
from django.core.signals import request_started
from django.dispatch import Signal
from django.template.context import get_standard_processors
from django.template.loader import render_to_string
from django.test.signals import template_rendered
from django.utils.translation import ugettext_lazy as _
from debug_toolbar.panels import DebugPanel
# Code taken and adapted from Simon Willison and Django Snippets:
# http://www.djangosnippets.org/snippets/766/
# Monkeypatch instrumented test renderer from django.test.utils - we could use
# django.test.utils.setup_test_environment for this but that would also set up
# e-mail interception, which we don't want
from django.test.utils import instrumented_test_render
from django.template import Template
if Template.render != instrumented_test_render:
Template.original_render = Template.render
Template.render = instrumented_test_render
# MONSTER monkey-patch
old_template_init = Template.__init__
def new_template_init(self, template_string, origin=None, name='<Unknown Template>'):
old_template_init(self, template_string, origin, name)
self.origin = origin
Template.__init__ = new_template_init
class TemplateDebugPanel(DebugPanel):
"""
A panel that lists all templates used during processing of a response.
"""
name = 'Template'
has_content = True
def __init__(self):
self.templates = []
template_rendered.connect(self._store_template_info)
def _store_template_info(self, sender, **kwargs):
self.templates.append(kwargs)
def nav_title(self):
return _('Templates')
def title(self):
num_templates = len([t for t in self.templates
if not t['template'].name.startswith('debug_toolbar/')])
return _('Templates (%(num_templates)s rendered)') % {'num_templates': num_templates}
def url(self):
return ''
def process_request(self, request):
self.request = request
def content(self):
context_processors = dict(
[
("%s.%s" % (k.__module__, k.__name__),
pformat(k(self.request))) for k in get_standard_processors()
]
)
template_context = []
for template_data in self.templates:
info = {}
# Clean up some info about templates
template = template_data.get('template', None)
# Skip templates that we are generating through the debug toolbar.
if template.name.startswith('debug_toolbar/'):
continue
if template.origin and template.origin.name:
template.origin_name = template.origin.name
else:
template.origin_name = 'No origin'
info['template'] = template
# Clean up context for better readability
if getattr(settings, 'DEBUG_TOOLBAR_CONFIG', {}).get('SHOW_TEMPLATE_CONTEXT', True):
context_data = template_data.get('context', None)
context_list = []
for context_layer in context_data.dicts:
for key, value in context_layer.items():
# Replace any request elements - they have a large
# unicode representation and the request data is
# already made available from the Request Vars panel.
if isinstance(value, http.HttpRequest):
context_layer[key] = '<<request>>'
# Replace the debugging sql_queries element. The SQL
# data is already made available from the SQL panel.
elif key == 'sql_queries' and isinstance(value, list):
context_layer[key] = '<<sql_queries>>'
# Replace LANGUAGES, which is available in i18n context processor
elif key == 'LANGUAGES' and isinstance(value, tuple):
context_layer[key] = '<<languages>>'
try:
context_list.append(pformat(context_layer))
except UnicodeEncodeError:
pass
info['context'] = '\n'.join(context_list)
template_context.append(info)
context = {
'templates': template_context,
'template_dirs': [normpath(x) for x in settings.TEMPLATE_DIRS],
'context_processors': context_processors,
}
return render_to_string('debug_toolbar/panels/templates.html', context)
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