Adding a templates panel that shows the templates used during a

request/response cycle.  Also lists settings.TEMPLATE_DIRS.

1 files changed, 56 insertions, 0 deletions

diff --git a/debug_toolbar/panels/template.py b/debug_toolbar/panels/template.py
new file mode 100644
index 0000000..f1cf65b
--- /dev/null
+++ b/debug_toolbar/panels/template.py
@@ -0,0 +1,56 @@
+from django.conf import settings
+from django.core.signals import request_started
+from django.dispatch import Signal
+from django.template.loader import render_to_string
+from django.test.signals import template_rendered
+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, request):
+        super(TemplateDebugPanel, self).__init__(request)
+        self.templates_used = []
+        template_rendered.connect(self._storeRenderedTemplates)
+
+    def _storeRenderedTemplates(self, sender, **kwargs):
+        self.templates_used.append(kwargs['template'])
+
+    def title(self):
+        return 'Templates'
+
+    def url(self):
+        return ''
+
+    def content(self):
+        templates = [
+            (t.name, t.origin and t.origin.name or 'No origin')
+            for t in self.templates_used
+        ]
+        context = {
+            'templates': templates,
+            'template_dirs': settings.TEMPLATE_DIRS,
+        }
+        return render_to_string('debug_toolbar/panels/templates.html', context)