re-structure blob, structured serialization

components/script/dom/bindings/serializable.rs

@@ -0,0 +1,32 @@
+/* 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/. */
+
+//! Trait representing the concept of [serializable objects]
+//! (https://html.spec.whatwg.org/multipage/#serializable-objects).
+
+use crate::dom::bindings::reflector::DomObject;
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::structuredclone::StructuredDataHolder;
+use crate::dom::globalscope::GlobalScope;
+
+/// The key corresponding to the storage location
+/// of a serialized platform object stored in a StructuredDataHolder.
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub struct StorageKey {
+    pub index: u32,
+    pub name_space: u32,
+}
+
+/// Interface for serializable platform objects.
+/// <https://html.spec.whatwg.org/multipage/#serializable>
+pub trait Serializable: DomObject {
+    /// <https://html.spec.whatwg.org/multipage/#serialization-steps>
+    fn serialize(&self, sc_holder: &mut StructuredDataHolder) -> Result<StorageKey, ()>;
+    /// <https://html.spec.whatwg.org/multipage/#deserialization-steps>
+    fn deserialize(
+        owner: &DomRoot<GlobalScope>,
+        sc_holder: &mut StructuredDataHolder,
+        extra_data: StorageKey,
+    ) -> Result<(), ()>;
+}