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LibWeb: Expose the ReadableStream tee IDL interface

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This just sets up the plumbing to the underlying ReadableStreamTee AO,
which as of this commit, will just throw a NotImplemented exception.
This commit is contained in:
Timothy Flynn 2024-01-28 10:28:59 -05:00 • committed by Andreas Kling
parent 5ccd1ff1bf
commit d8413774df
5 changed files with 43 additions and 1 deletions
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15
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -238,6 +238,21 @@ bool readable_stream_has_default_reader(ReadableStream const& stream)
return false;
}
// https://streams.spec.whatwg.org/#readable-stream-tee
WebIDL::ExceptionOr<ReadableStreamPair> readable_stream_tee(JS::Realm& realm, ReadableStream& stream, bool)
{
// 1. Assert: stream implements ReadableStream.
// 2. Assert: cloneForBranch2 is a boolean.
// 3. If stream.[[controller]] implements ReadableByteStreamController, return ? ReadableByteStreamTee(stream).
if (stream.controller()->has<JS::NonnullGCPtr<Streams::ReadableByteStreamController>>()) {
return realm.vm().throw_completion<JS::InternalError>(JS::ErrorType::NotImplemented, "Byte stream teeing");
}
// 4. Return ? ReadableStreamDefaultTee(stream, cloneForBranch2).
return realm.vm().throw_completion<JS::InternalError>(JS::ErrorType::NotImplemented, "Default stream teeing");
}
// https://streams.spec.whatwg.org/#make-size-algorithm-from-size-function
JS::NonnullGCPtr<SizeAlgorithm> extract_size_algorithm(JS::VM& vm, QueuingStrategy const& strategy)
{