1 files changed, 70 insertions, 0 deletions
diff --git a/django/views/admin/template.py b/django/views/admin/template.py
new file mode 100644
index 0000000000..7c5e41e237
--- /dev/null
+++ b/django/views/admin/template.py
@@ -0,0 +1,70 @@
+from django.core import formfields, template_loader, validators
+from django.core import template
+from django.core.extensions import CMSContext as Context
+from django.utils.httpwrappers import HttpResponse
+from django.models.core import sites
+from django.conf import settings
+
+def template_validator(request):
+    """
+    Displays the template validator form, which finds and displays template
+    syntax errors.
+    """
+    # get a dict of {site_id : settings_module} for the validator
+    settings_modules = {}
+    for mod in settings.ADMIN_FOR:
+        settings_module = __import__(mod, '', '', [''])
+        settings_modules[settings_module.SITE_ID] = settings_module
+    manipulator = TemplateValidator(settings_modules)
+    new_data, errors = {}, {}
+    if request.POST:
+        new_data = request.POST.copy()
+        errors = manipulator.get_validation_errors(new_data)
+        if not errors:
+            request.user.add_message('The template is valid.')
+    t = template_loader.get_template('template_validator')
+    c = Context(request, {
+        'title': 'Template validator',
+        'form': formfields.FormWrapper(manipulator, new_data, errors),
+    })
+    return HttpResponse(t.render(c))
+
+class TemplateValidator(formfields.Manipulator):
+    def __init__(self, settings_modules):
+        self.settings_modules = settings_modules
+        site_list = sites.get_in_bulk(settings_modules.keys()).values()
+        self.fields = (
+            formfields.SelectField('site', is_required=True, choices=[(s.id, s.name) for s in site_list]),
+            formfields.LargeTextField('template', is_required=True, rows=25, validator_list=[self.isValidTemplate]),
+        )
+
+    def isValidTemplate(self, field_data, all_data):
+        # get the settings module
+        # if the site isn't set, we don't raise an error since the site field will
+        try:
+            site_id = int(all_data.get('site', None))
+        except (ValueError, TypeError):
+            return
+        settings_module = self.settings_modules.get(site_id, None)
+        if settings_module is None:
+            return
+
+        # so that inheritance works in the site's context, register a new function
+        # for "extends" that uses the site's TEMPLATE_DIR instead
+        def new_do_extends(parser, token):
+            node = template_loader.do_extends(parser, token)
+            node.template_dirs = settings_module.TEMPLATE_DIRS
+            return node
+        template.register_tag('extends', new_do_extends)
+
+        # now validate the template using the new template dirs
+        # making sure to reset the extends function in any case
+        error = None
+        try:
+            tmpl = template_loader.get_template_from_string(field_data)
+            tmpl.render(template.Context({}))
+        except template.TemplateSyntaxError, e:
+            error = e
+        template.register_tag('extends', template_loader.do_extends)
+        if error:
+            raise validators.ValidationError, e.args