Refactor common boilerplate out of serialize/transfer implementations (#35831)

* script: Create infrastructure for reducing hand-written serializable/transferrable implementations.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Clone all serializable DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Deserialize all serializable DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Serialize all serializable DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Transfer-receive all transferable DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Transfer all transferable DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Formatting.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Extract boilerplate from serialize/deserialize implementations.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Extract boilerplate from transfer-receive.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Extract boilerplate from transfer operation.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Tidy fixes.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Check transferability of all DOM interfaces.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Clippy fixes.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Clippy fixes.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Remove unnecessary duplicate crate.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Formatting.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

1 files changed, 35 insertions, 8 deletions

diff --git a/components/script/dom/bindings/transferable.rs b/components/script/dom/bindings/transferable.rs
index 674d652119b..7c052e41294 100644
--- a/components/script/dom/bindings/transferable.rs
+++ b/components/script/dom/bindings/transferable.rs
@@ -5,18 +5,45 @@
 //! Trait representing the concept of [transferable objects]
 //! (<https://html.spec.whatwg.org/multipage/#transferable-objects>).
 
-use js::jsapi::MutableHandleObject;
+use std::collections::HashMap;
+use std::num::NonZeroU32;
+
+use base::id::PipelineNamespaceId;
 
 use crate::dom::bindings::reflector::DomObject;
-use crate::dom::bindings::structuredclone::{StructuredDataReader, StructuredDataWriter};
+use crate::dom::bindings::root::DomRoot;
+use crate::dom::bindings::structuredclone::{StructuredData, StructuredDataReader};
 use crate::dom::globalscope::GlobalScope;
 
-pub(crate) trait Transferable: DomObject {
-    fn transfer(&self, sc_writer: &mut StructuredDataWriter) -> Result<u64, ()>;
+pub(crate) trait IdFromComponents
+where
+    Self: Sized,
+{
+    fn from(namespace_id: PipelineNamespaceId, index: NonZeroU32) -> Self;
+}
+
+pub(crate) trait ExtractComponents {
+    fn components(&self) -> (PipelineNamespaceId, NonZeroU32);
+}
+
+pub(crate) trait Transferable: DomObject
+where
+    Self: Sized,
+{
+    type Id: Eq + std::hash::Hash + Copy + IdFromComponents + ExtractComponents;
+    type Data;
+
+    fn can_transfer(&self) -> bool {
+        true
+    }
+
+    fn transfer(&self) -> Result<(Self::Id, Self::Data), ()>;
     fn transfer_receive(
         owner: &GlobalScope,
-        sc_reader: &mut StructuredDataReader,
-        extra_data: u64,
-        return_object: MutableHandleObject,
-    ) -> Result<(), ()>;
+        id: Self::Id,
+        serialized: Self::Data,
+    ) -> Result<DomRoot<Self>, ()>;
+
+    fn serialized_storage(data: StructuredData<'_>) -> &mut Option<HashMap<Self::Id, Self::Data>>;
+    fn deserialized_storage(reader: &mut StructuredDataReader) -> &mut Option<Vec<DomRoot<Self>>>;
 }