def __call__(self, *args, **kwargs):
node = self.stack_node
previewed_item = self.previewed_item
publishable = self.preview_publishable
preview_language = self.preview_language
user = get_current_user()
# Set the language for the preview
if preview_language:
set_language(preview_language)
# Enforce permissions
user.require_permission(ReadPermission, target=previewed_item)
if publishable is not previewed_item:
user.require_permission(ReadPermission, target=publishable)
# Disable the preview if the item's unsaved state produces validation
# errors; these would usually lead to unhandled server errors during
# rendering.
errors = schema.ErrorList(node.iter_errors())
if errors:
error_box = templates.new("cocktail.html.ErrorBox")
error_box.errors = errors
message = Element("div",
class_name="preview-error-box",
children=[
translations(
"woost.backoffice invalid item preview",
preview_language), error_box
])
message.add_resource("/resources/styles/backoffice.css")
return message.render_page()
# Update the edited item with the data to preview
node.import_form_data(node.form_data, previewed_item)
self.context.update(original_publishable=self.context["publishable"],
publishable=publishable)
controller = publishable.resolve_controller()
if controller is None:
raise cherrypy.NotFound()
if isinstance(controller, type):
controller = controller()
return controller()
def test_ignores_duplicate_resources(self):
from cocktail.html import Element, DocumentMetadata
a = Element()
a.add_resource("/foo.js")
b = Element()
b.add_resource("/foo.js")
metadata = DocumentMetadata()
metadata.collect(a)
resources1 = list(metadata.resources)
metadata.collect(b)
resources2 = list(metadata.resources)
assert resources1 == resources2
