b0bc8f2282
This is not to the specification, but as the FIXME comment for the function states, we need it to be able to properly interface with the FileAPI spcification, which seems to have not been updated to the non promise based API.
87 lines
2.6 KiB
C++
87 lines
2.6 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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#pragma once
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#include <AK/Function.h>
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#include <AK/SinglyLinkedList.h>
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#include <LibJS/Forward.h>
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#include <LibWeb/Bindings/PlatformObject.h>
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#include <LibWeb/Forward.h>
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#include <LibWeb/Streams/ReadableStreamGenericReader.h>
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namespace Web::Streams {
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struct ReadableStreamReadResult {
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JS::Value value;
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bool done;
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};
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class ReadRequest : public RefCounted<ReadRequest> {
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public:
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virtual ~ReadRequest() = default;
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virtual void on_chunk(JS::Value chunk) = 0;
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virtual void on_close() = 0;
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virtual void on_error(JS::Value error) = 0;
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};
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class ReadLoopReadRequest : public ReadRequest {
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public:
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// successSteps, which is an algorithm accepting a byte sequence
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using SuccessSteps = JS::SafeFunction<void(ByteBuffer)>;
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// failureSteps, which is an algorithm accepting a JavaScript value
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using FailureSteps = JS::SafeFunction<void(JS::Value error)>;
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ReadLoopReadRequest(JS::VM& vm, JS::Realm& realm, ReadableStreamDefaultReader& reader, SuccessSteps success_steps, FailureSteps failure_steps);
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virtual void on_chunk(JS::Value chunk) override;
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virtual void on_close() override;
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virtual void on_error(JS::Value error) override;
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private:
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JS::VM& m_vm;
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JS::Realm& m_realm;
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ReadableStreamDefaultReader& m_reader;
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ByteBuffer m_bytes;
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SuccessSteps m_success_steps;
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FailureSteps m_failure_steps;
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};
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// https://streams.spec.whatwg.org/#readablestreamdefaultreader
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class ReadableStreamDefaultReader final
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: public Bindings::PlatformObject
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, public ReadableStreamGenericReaderMixin {
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WEB_PLATFORM_OBJECT(ReadableStreamDefaultReader, Bindings::PlatformObject);
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public:
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static WebIDL::ExceptionOr<JS::NonnullGCPtr<ReadableStreamDefaultReader>> construct_impl(JS::Realm&, JS::NonnullGCPtr<ReadableStream>);
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virtual ~ReadableStreamDefaultReader() override = default;
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WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> read();
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WebIDL::ExceptionOr<void> read_all_bytes(ReadLoopReadRequest::SuccessSteps, ReadLoopReadRequest::FailureSteps);
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WebIDL::ExceptionOr<JS::NonnullGCPtr<WebIDL::Promise>> read_all_bytes_deprecated();
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WebIDL::ExceptionOr<void> release_lock();
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SinglyLinkedList<NonnullRefPtr<ReadRequest>>& read_requests() { return m_read_requests; }
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private:
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explicit ReadableStreamDefaultReader(JS::Realm&);
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virtual JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
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virtual void visit_edges(Cell::Visitor&) override;
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SinglyLinkedList<NonnullRefPtr<ReadRequest>> m_read_requests;
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};
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}
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