| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_READABLE_STREAM_DEFAULT_READER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_READABLE_STREAM_DEFAULT_READER_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/active_script_wrappable.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h" |
| #include "third_party/blink/renderer/core/streams/readable_byte_stream_controller.h" |
| #include "third_party/blink/renderer/core/streams/readable_stream_generic_reader.h" |
| #include "third_party/blink/renderer/platform/bindings/script_wrappable.h" |
| #include "third_party/blink/renderer/platform/wtf/casting.h" |
| |
| namespace blink { |
| |
| class ExceptionState; |
| class ReadableStream; |
| class ScriptPromise; |
| class ScriptState; |
| class StreamPromiseResolver; |
| |
| class CORE_EXPORT ReadableStreamDefaultReader |
| : public ReadableStreamGenericReader, |
| public ActiveScriptWrappable<ReadableStreamDefaultReader>, |
| public ExecutionContextClient { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| static ReadableStreamDefaultReader* Create(ScriptState*, |
| ReadableStream* stream, |
| ExceptionState&); |
| |
| // https://streams.spec.whatwg.org/#default-reader-constructor |
| ReadableStreamDefaultReader(ScriptState*, |
| ReadableStream* stream, |
| ExceptionState&); |
| ~ReadableStreamDefaultReader() override; |
| |
| bool IsDefaultReader() const override { return true; } |
| bool IsBYOBReader() const override { return false; } |
| |
| // https://streams.spec.whatwg.org/#default-reader-read |
| ScriptPromise read(ScriptState*, ExceptionState&); |
| |
| // https://streams.spec.whatwg.org/#default-reader-release-lock |
| void releaseLock(ScriptState*, ExceptionState&); |
| |
| static void SetUpDefaultReader(ScriptState*, |
| ReadableStreamDefaultReader* reader, |
| ReadableStream* stream, |
| ExceptionState&); |
| |
| // |
| // Readable stream reader abstract operations |
| // |
| |
| // https://streams.spec.whatwg.org/#readable-stream-default-reader-read |
| static StreamPromiseResolver* Read(ScriptState*, |
| ReadableStreamDefaultReader* reader); |
| |
| void Trace(Visitor*) const override; |
| |
| bool HasPendingActivity() const final; |
| |
| private: |
| friend class ReadableByteStreamController; |
| friend class ReadableStreamDefaultController; |
| friend class ReadableStream; |
| |
| HeapDeque<Member<StreamPromiseResolver>> read_requests_; |
| bool for_author_code_ = true; |
| }; |
| |
| template <> |
| struct DowncastTraits<ReadableStreamDefaultReader> { |
| static bool AllowFrom(const ReadableStreamGenericReader& reader) { |
| return reader.IsDefaultReader(); |
| } |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_READABLE_STREAM_DEFAULT_READER_H_ |