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LibWeb: Add AO create_writable_stream()

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Kenneth Myhra 2023-07-08 06:51:08 +02:00 • committed by Andreas Kling
parent 7d8f24c227
commit 894f1e9d62
2 changed files with 23 additions and 0 deletions
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22
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -1156,6 +1156,28 @@ bool readable_byte_stream_controller_should_call_pull(ReadableByteStreamControll
return false;
}
// https://streams.spec.whatwg.org/#create-writable-stream
WebIDL::ExceptionOr<JS::NonnullGCPtr<WritableStream>> create_writable_stream(JS::Realm& realm, StartAlgorithm&& start_algorithm, WriteAlgorithm&& write_algorithm, CloseAlgorithm&& close_algorithm, AbortAlgorithm&& abort_algorithm, double high_water_mark, SizeAlgorithm&& size_algorithm)
{
// 1. Assert: ! IsNonNegativeNumber(highWaterMark) is true.
VERIFY(is_non_negative_number(JS::Value { high_water_mark }));
// 2. Let stream be a new WritableStream.
auto stream = MUST_OR_THROW_OOM(realm.heap().allocate<WritableStream>(realm, realm));
// 3. Perform ! InitializeWritableStream(stream).
initialize_writable_stream(*stream);
// 4. Let controller be a new WritableStreamDefaultController.
auto controller = MUST_OR_THROW_OOM(realm.heap().allocate<WritableStreamDefaultController>(realm, realm));
// 5. Perform ? SetUpWritableStreamDefaultController(stream, controller, startAlgorithm, writeAlgorithm, closeAlgorithm, abortAlgorithm, highWaterMark, sizeAlgorithm).
TRY(set_up_writable_stream_default_controller(*stream, *controller, move(start_algorithm), move(write_algorithm), move(close_algorithm), move(abort_algorithm), high_water_mark, move(size_algorithm)));
// 6. Return stream.
return stream;
}
// https://streams.spec.whatwg.org/#initialize-writable-stream
void initialize_writable_stream(WritableStream& stream)
{