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/* 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 [transferable objects]
//! (<https://html.spec.whatwg.org/multipage/#transferable-objects>).
use std::collections::HashMap;
use std::hash::Hash;
use base::id::NamespaceIndex;
use crate::dom::bindings::reflector::DomObject;
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::structuredclone::{StructuredData, StructuredDataReader};
use crate::dom::globalscope::GlobalScope;
pub(crate) trait Transferable: DomObject
where
Self: Sized,
{
type Index: Copy + Eq + Hash;
type Data;
fn can_transfer(&self) -> bool {
true
}
fn transfer(&self) -> Result<(NamespaceIndex<Self::Index>, Self::Data), ()>;
fn transfer_receive(
owner: &GlobalScope,
id: NamespaceIndex<Self::Index>,
serialized: Self::Data,
) -> Result<DomRoot<Self>, ()>;
fn serialized_storage(
data: StructuredData<'_>,
) -> &mut Option<HashMap<NamespaceIndex<Self::Index>, Self::Data>>;
fn deserialized_storage(reader: &mut StructuredDataReader) -> &mut Option<Vec<DomRoot<Self>>>;
}
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