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LibWeb: Implement ReadableByteStreamController.[[CancelSteps]]

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Matthew Olsson 2023-04-08 06:31:36 -07:00 • committed by Linus Groh
parent 8274906301
commit c97f6b7701
5 changed files with 68 additions and 0 deletions
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38
Userland/Libraries/LibWeb/Streams/AbstractOperations.cpp
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@ -12,6 +12,7 @@
#include <LibWeb/Streams/AbstractOperations.h>
#include <LibWeb/Streams/ReadableByteStreamController.h>
#include <LibWeb/Streams/ReadableStream.h>
#include <LibWeb/Streams/ReadableStreamBYOBRequest.h>
#include <LibWeb/Streams/ReadableStreamDefaultController.h>
#include <LibWeb/Streams/ReadableStreamDefaultReader.h>
#include <LibWeb/Streams/ReadableStreamGenericReader.h>
@ -744,6 +745,26 @@ WebIDL::ExceptionOr<void> set_up_readable_stream_default_controller_from_underly
return set_up_readable_stream_default_controller(stream, controller, move(start_algorithm), move(pull_algorithm), move(cancel_algorithm), high_water_mark, move(size_algorithm));
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-clear-algorithms
void readable_byte_stream_controller_clear_algorithms(ReadableByteStreamController& controller)
{
// 1. Set controller.[[pullAlgorithm]] to undefined.
controller.set_pull_algorithm({});
// 2. Set controller.[[cancelAlgorithm]] to undefined.
controller.set_cancel_algorithm({});
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-clear-pending-pull-intos
void readable_byte_stream_controller_clear_pending_pull_intos(ReadableByteStreamController& controller)
{
// 1. Perform ! ReadableByteStreamControllerInvalidateBYOBRequest(controller).
readable_byte_stream_controller_invalidate_byob_request(controller);
// 2. Set controller.[[pendingPullIntos]] to a new empty list.
controller.pending_pull_intos().clear();
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-get-desired-size
Optional<double> readable_byte_stream_controller_get_desired_size(ReadableByteStreamController const& controller)
{
@ -762,6 +783,23 @@ Optional<double> readable_byte_stream_controller_get_desired_size(ReadableByteSt
return controller.strategy_hwm() - controller.queue_total_size();
}
// https://streams.spec.whatwg.org/#readable-byte-stream-controller-invalidate-byob-request
void readable_byte_stream_controller_invalidate_byob_request(ReadableByteStreamController& controller)
{
// 1. If controller.[[byobRequest]] is null, return.
if (!controller.byob_request())
return;
// 2. Set controller.[[byobRequest]].[[controller]] to undefined.
controller.byob_request()->set_controller({});
// 3. Set controller.[[byobRequest]].[[view]] to null.
controller.byob_request()->set_view({});
// 4. Set controller.[[byobRequest]] to null.
controller.set_byob_request({});
}
// https://streams.spec.whatwg.org/#acquire-writable-stream-default-writer
WebIDL::ExceptionOr<JS::NonnullGCPtr<WritableStreamDefaultWriter>> acquire_writable_stream_default_writer(WritableStream& stream)
{