Add stub Activatable trait

components/script/dom/activation.rs

@@ -0,0 +1,27 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+use dom::bindings::codegen::InheritTypes::HTMLInputElementCast;
+use dom::bindings::js::JSRef;
+use dom::element::HTMLInputElementTypeId;
+use dom::htmlinputelement::HTMLInputElement;
+use dom::node::{ElementNodeTypeId, Node, NodeHelpers};
+
+pub trait Activatable {}
+
+
+/// Obtain an Activatable instance for a given Node-derived object,
+/// if it is activatable
+pub fn activation_vtable_for<'a>(node: &'a JSRef<'a, Node>) -> Option<&'a Activatable + 'a> {
+    match node.type_id() {
+        ElementNodeTypeId(HTMLInputElementTypeId) => {
+            let _element: &'a JSRef<'a, HTMLInputElement> = HTMLInputElementCast::to_borrowed_ref(node).unwrap();
+            // Some(element as &'a VirtualMethods + 'a)
+            None
+        },
+        _ => {
+            None
+        }
+    }
+}

components/script/lib.rs

@@ -82,6 +82,7 @@ pub mod dom {
     #[path="bindings/codegen/InterfaceTypes.rs"]
     pub mod types;
 
+    pub mod activation;
     pub mod attr;
     pub mod blob;
     pub mod browsercontext;