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LibWeb: Implement the Streams SetUpReadableStreamBYOBReader AO

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Co-Authored-By: Matthew Olsson <mattco@serenityos.org>
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Shannon Booth 2023-06-29 20:52:35 +12:00 committed by Linus Groh
parent aff38ae80f
commit 9ccadf61a2
Notes: sideshowbarker 2024-07-16 20:12:13 +09:00 
Author: https://github.com/shannonbooth
Commit: https://github.com/SerenityOS/serenity/commit/9ccadf61a2
Pull-request: https://github.com/SerenityOS/serenity/pull/19740
Reviewed-by: https://github.com/linusg
Reviewed-by: https://github.com/mattco98 ✅
2 changed files with 21 additions and 0 deletions
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20
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -481,6 +481,26 @@ WebIDL::ExceptionOr<void> set_up_readable_stream_default_reader(ReadableStreamDe
return {};
}
// https://streams.spec.whatwg.org/#set-up-readable-stream-byob-reader
WebIDL::ExceptionOr<void> set_up_readable_stream_byob_reader(ReadableStreamBYOBReader& reader, ReadableStream& stream)
{
// 1. If ! IsReadableStreamLocked(stream) is true, throw a TypeError exception.
if (is_readable_stream_locked(stream))
return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "Cannot create stream reader for a locked stream"sv };
// 2. If stream.[[controller]] does not implement ReadableByteStreamController, throw a TypeError exception.
if (!stream.controller()->has<JS::NonnullGCPtr<ReadableByteStreamController>>())
return WebIDL::SimpleException { WebIDL::SimpleExceptionType::TypeError, "BYOB reader cannot set up reader from non-byte stream"sv };
// 3. Perform ! ReadableStreamReaderGenericInitialize(reader, stream).
readable_stream_reader_generic_initialize(ReadableStreamReader { reader }, stream);
// 4. Set reader.[[readIntoRequests]] to a new empty list.
reader.read_into_requests().clear();
return {};
}
// https://streams.spec.whatwg.org/#readable-stream-default-controller-close
void readable_stream_default_controller_close(ReadableStreamDefaultController& controller)
{

1
Userland/Libraries/LibWeb/Streams/AbstractOperations.h
View file

@ -49,6 +49,7 @@ void readable_stream_default_reader_error_read_requests(ReadableStreamDefaultRea
WebIDL::ExceptionOr<void> readable_stream_default_reader_read(ReadableStreamDefaultReader&, ReadRequest&);
WebIDL::ExceptionOr<void> readable_stream_default_reader_release(ReadableStreamDefaultReader&);
WebIDL::ExceptionOr<void> set_up_readable_stream_default_reader(ReadableStreamDefaultReader&, ReadableStream&);
WebIDL::ExceptionOr<void> set_up_readable_stream_byob_reader(ReadableStreamBYOBReader&, ReadableStream&);
void readable_stream_default_controller_close(ReadableStreamDefaultController&);
WebIDL::ExceptionOr<void> readable_stream_default_controller_enqueue(ReadableStreamDefaultController&, JS::Value chunk);
WebIDL::ExceptionOr<void> readable_stream_default_controller_can_pull_if_needed(ReadableStreamDefaultController&);