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LibWeb: Add TransformStream scaffolding

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This adds the scaffolding of TransformStream so we can start
implementing the necessary abstract operations for it.
This commit is contained in:
Kenneth Myhra 2023-07-06 19:37:12 +02:00 • committed by Andreas Kling
parent 90fdd598c2
commit f1d69d789b
6 changed files with 140 additions and 0 deletions
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50
Userland/Libraries/LibWeb/Streams/TransformStream.cpp Normal file
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/*
* Copyright (c) 2023, Kenneth Myhra <kennethmyhra@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Bindings/Intrinsics.h>
#include <LibWeb/Streams/AbstractOperations.h>
#include <LibWeb/Streams/TransformStream.h>
#include <LibWeb/Streams/Transformer.h>
#include <LibWeb/Streams/WritableStream.h>
#include <LibWeb/WebIDL/ExceptionOr.h>
namespace Web::Streams {
// https://streams.spec.whatwg.org/#ts-construct
WebIDL::ExceptionOr<JS::NonnullGCPtr<TransformStream>> TransformStream::construct_impl(JS::Realm& realm, Optional<JS::Handle<JS::Object>> transformer_object, QueuingStrategy const& writable_strategy, QueuingStrategy const& readable_strategy)
{
(void)transformer_object;
(void)writable_strategy;
(void)readable_strategy;
return MUST_OR_THROW_OOM(realm.heap().allocate<TransformStream>(realm, realm));
}
TransformStream::TransformStream(JS::Realm& realm)
: Bindings::PlatformObject(realm)
{
}
TransformStream::~TransformStream() = default;
JS::ThrowCompletionOr<void> TransformStream::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
set_prototype(&Bindings::ensure_web_prototype<Bindings::TransformStreamPrototype>(realm, "TransformStream"));
return {};
}
void TransformStream::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_backpressure_change_promise);
visitor.visit(m_controller);
visitor.visit(m_readable);
visitor.visit(m_writable);
}
}