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a5b02047f9
The structured cloning with transfer list https://html.spec.whatwg.org/multipage/#structuredserializewithtransfer throws a "DataCloneError" DOM expection by default if serialization/transferral is not possible, but a platform object can throw a custom excepton on its serialization/transfer steps. One example is OffscreenCanvas, which can throw an "InvalidStateError" exception if the context mode is not none on transfer steps. https://html.spec.whatwg.org/multipage/#the-offscreencanvas-interface:transfer-steps Testing: Improvements in the following tests - html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable* Fixes: #37919 Signed-off-by: Andrei Volykhin <andrei.volykhin@gmail.com>
43 lines
1.3 KiB
Rust
43 lines
1.3 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//! Trait representing the concept of [transferable objects]
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//! (<https://html.spec.whatwg.org/multipage/#transferable-objects>).
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use std::collections::HashMap;
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use std::hash::Hash;
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use base::id::NamespaceIndex;
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use crate::dom::bindings::error::Fallible;
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use crate::dom::bindings::reflector::DomObject;
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::bindings::structuredclone::StructuredData;
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use crate::dom::globalscope::GlobalScope;
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pub(crate) trait Transferable: DomObject
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where
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Self: Sized,
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{
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type Index: Copy + Eq + Hash;
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type Data;
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fn can_transfer(&self) -> bool {
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true
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}
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/// <https://html.spec.whatwg.org/multipage/#transfer-steps>
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fn transfer(&self) -> Fallible<(NamespaceIndex<Self::Index>, Self::Data)>;
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/// <https://html.spec.whatwg.org/multipage/#transfer-receiving-steps>
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fn transfer_receive(
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owner: &GlobalScope,
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id: NamespaceIndex<Self::Index>,
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serialized: Self::Data,
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) -> Result<DomRoot<Self>, ()>;
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fn serialized_storage<'a>(
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data: StructuredData<'a, '_>,
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) -> &'a mut Option<HashMap<NamespaceIndex<Self::Index>, Self::Data>>;
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}
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