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LibWeb: Implement ReadableStream's async iterator

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This commit is contained in:
Timothy Flynn
2025-04-12 13:19:05 -04:00
committed by Tim Flynn
parent e6463e4ecc
commit d5d9d999ae
Notes: github-actions[bot] 2025-04-14 21:44:12 +00:00 
Author: https://github.com/trflynn89
Commit: https://github.com/LadybirdBrowser/ladybird/commit/d5d9d999ae4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/4338
Reviewed-by: https://github.com/kennethmyhra ✅
8 changed files with 261 additions and 43 deletions
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42
Libraries/LibWeb/Streams/ReadableStreamAsyncIterator.h Normal file
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/*
* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibWeb/Bindings/PlatformObject.h>
#include <LibWeb/Forward.h>
#include <LibWeb/WebIDL/AsyncIterator.h>
namespace Web::Streams {
// https://streams.spec.whatwg.org/#dictdef-readablestreamiteratoroptions
struct ReadableStreamIteratorOptions {
bool prevent_cancel { false };
};
class ReadableStreamAsyncIterator final : public WebIDL::AsyncIterator {
WEB_PLATFORM_OBJECT(ReadableStreamAsyncIterator, WebIDL::AsyncIterator);
GC_DECLARE_ALLOCATOR(ReadableStreamAsyncIterator);
public:
static WebIDL::ExceptionOr<GC::Ref<ReadableStreamAsyncIterator>> create(JS::Realm&, JS::Object::PropertyKind, ReadableStream&, ReadableStreamIteratorOptions);
virtual ~ReadableStreamAsyncIterator() override;
private:
ReadableStreamAsyncIterator(JS::Realm&, JS::Object::PropertyKind, GC::Ref<ReadableStreamDefaultReader>, bool prevent_cancel);
virtual void initialize(JS::Realm&) override;
virtual void visit_edges(Cell::Visitor&) override;
virtual GC::Ref<WebIDL::Promise> next_iteration_result(JS::Realm&) override;
virtual GC::Ref<WebIDL::Promise> iterator_return(JS::Realm&, JS::Value) override;
GC::Ref<ReadableStreamDefaultReader> m_reader;
bool m_prevent_cancel { false };
};
}