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LibWeb: Implement ReadableByteStreamControllerCommitPullIntoDescriptor

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Shannon Booth 2023-11-19 12:11:47 +13:00 • committed by Andreas Kling
parent cdcc1ebbba
commit aca63fd947
2 changed files with 40 additions and 0 deletions
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39
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -1719,6 +1719,45 @@ WebIDL::ExceptionOr<void> readable_byte_stream_controller_enqueue_detached_pull_
return {};
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-commit-pull-into-descriptor
void readable_byte_stream_controller_commit_pull_into_descriptor(ReadableStream& stream, PullIntoDescriptor const& pull_into_descriptor)
{
// 1. Assert: stream.[[state]] is not "errored".
VERIFY(!stream.is_errored());
// 2. Assert: pullIntoDescriptor.reader type is not "none".
VERIFY(pull_into_descriptor.reader_type != ReaderType::None);
// 3. Let done be false.
bool done = false;
// 4. If stream.[[state]] is "closed",
if (stream.is_closed()) {
// 1. Assert: pullIntoDescriptor’s bytes filled is 0.
VERIFY(pull_into_descriptor.bytes_filled == 0);
// 2. Set done to true.
done = true;
}
// 5. Let filledView be ! ReadableByteStreamControllerConvertPullIntoDescriptor(pullIntoDescriptor).
auto filled_view = readable_byte_stream_controller_convert_pull_into_descriptor(stream.realm(), pull_into_descriptor);
// 6. If pullIntoDescriptor’s reader type is "default",
if (pull_into_descriptor.reader_type == ReaderType::Default) {
// 1. Perform ! ReadableStreamFulfillReadRequest(stream, filledView, done).
readable_stream_fulfill_read_request(stream, filled_view, done);
}
// 7. Otherwise,
else {
// 1. Assert: pullIntoDescriptor’s reader type is "byob".
VERIFY(pull_into_descriptor.reader_type == ReaderType::Byob);
// 2. Perform ! ReadableStreamFulfillReadIntoRequest(stream, filledView, done).
readable_stream_fulfill_read_into_request(stream, filled_view, done);
}
}
// https://streams.spec.whatwg.org/#abstract-opdef-readablebytestreamcontrollerprocessreadrequestsusingqueue
WebIDL::ExceptionOr<void> readable_byte_stream_controller_process_read_requests_using_queue(ReadableByteStreamController& controller)
{