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LibWeb: Add AO transform_stream_default_controller_perform_transform()

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Kenneth Myhra 2023-07-07 21:44:19 +02:00 • committed by Andreas Kling
parent 4d4fc53f5c
commit 11c0600729
2 changed files with 23 additions and 0 deletions
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22
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -2823,6 +2823,28 @@ WebIDL::ExceptionOr<void> transform_stream_default_controller_terminate(Transfor
return {};
}
// https://streams.spec.whatwg.org/#transform-stream-default-controller-perform-transform
WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::Promise>> transform_stream_default_controller_perform_transform(TransformStreamDefaultController& controller, JS::Value chunk)
{
auto& realm = controller.realm();
// 1. Let transformPromise be the result of performing controller.[[transformAlgorithm]], passing chunk.
auto transform_promise = TRY((*controller.transform_algorithm())(chunk));
// 2. Return the result of reacting to transformPromise with the following rejection steps given the argument r:
auto react_result = WebIDL::react_to_promise(*transform_promise,
{},
[&](auto const& reason) -> WebIDL::ExceptionOr<JS::Value> {
// 1. Perform ! TransformStreamError(controller.[[stream]], r).
TRY(transform_stream_error(*controller.stream(), reason));
// 2. Throw r.
return JS::throw_completion(reason);
});
return WebIDL::create_resolved_promise(realm, react_result);
}
// https://streams.spec.whatwg.org/#transform-stream-error
WebIDL::ExceptionOr<void> transform_stream_error(TransformStream& stream, JS::Value error)
{