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50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
/*
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* Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/Promise.h>
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#include <LibJS/Runtime/PromiseCapability.h>
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#include <LibWeb/Streams/AbstractOperations.h>
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#include <LibWeb/Streams/ReadableStream.h>
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#include <LibWeb/Streams/ReadableStreamGenericReader.h>
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#include <LibWeb/WebIDL/Promise.h>
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namespace Web::Streams {
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// https://streams.spec.whatwg.org/#generic-reader-closed
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JS::GCPtr<JS::Promise> ReadableStreamGenericReaderMixin::closed()
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{
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// 1. Return this.[[closedPromise]].
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return JS::GCPtr { verify_cast<JS::Promise>(*m_closed_promise->promise()) };
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}
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// https://streams.spec.whatwg.org/#generic-reader-cancel
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JS::NonnullGCPtr<JS::Promise> ReadableStreamGenericReaderMixin::cancel(JS::Value reason)
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{
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// 1. If this.[[stream]] is undefined, return a promise rejected with a TypeError exception.
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if (!m_stream) {
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WebIDL::SimpleException exception { WebIDL::SimpleExceptionType::TypeError, "No stream present to cancel"sv };
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return WebIDL::create_rejected_promise_from_exception(m_realm, move(exception));
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}
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// 2. Return ! ReadableStreamReaderGenericCancel(this, reason).
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auto promise_capability = readable_stream_reader_generic_cancel(*this, reason);
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return JS::NonnullGCPtr { verify_cast<JS::Promise>(*promise_capability->promise().ptr()) };
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}
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ReadableStreamGenericReaderMixin::ReadableStreamGenericReaderMixin(JS::Realm& realm)
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: m_realm(realm)
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{
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}
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void ReadableStreamGenericReaderMixin::visit_edges(JS::Cell::Visitor& visitor)
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{
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visitor.visit(m_closed_promise);
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visitor.visit(m_stream);
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visitor.visit(m_realm);
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}
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}
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