| // 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_READER_H_ |
| #define THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_READABLE_STREAM_READER_H_ |
| |
| #include "third_party/blink/renderer/bindings/core/v8/script_value.h" |
| #include "third_party/blink/renderer/core/core_export.h" |
| #include "third_party/blink/renderer/platform/bindings/script_wrappable.h" |
| #include "v8/include/v8.h" |
| |
| namespace blink { |
| |
| class ExceptionState; |
| class ScriptPromise; |
| class ScriptState; |
| class ReadableStream; |
| class StreamPromiseResolver; |
| class Visitor; |
| |
| // The specification sometimes treats ReadableStreamDefaultReader and |
| // ReadableStreamBYOBReader generically. Currently ReadableStreamBYOBReader |
| // isn't implemented in Blink. In order to make the generic operations align |
| // with the standard, ReadableStreamDefaultReader is implemented by the |
| // ReadableStreamReader class. |
| // TODO(ricea): Refactor this when implementing ReadableStreamBYOBReader. |
| class CORE_EXPORT ReadableStreamReader : public ScriptWrappable { |
| DEFINE_WRAPPERTYPEINFO(); |
| |
| public: |
| static ReadableStreamReader* Create(ScriptState*, |
| ReadableStream* stream, |
| ExceptionState&); |
| |
| // https://streams.spec.whatwg.org/#default-reader-constructor |
| ReadableStreamReader(ScriptState*, ReadableStream* stream, ExceptionState&); |
| ~ReadableStreamReader() override; |
| |
| // https://streams.spec.whatwg.org/#default-reader-closed |
| ScriptPromise closed(ScriptState*) const; |
| |
| // https://streams.spec.whatwg.org/#default-reader-cancel |
| ScriptPromise cancel(ScriptState*, ExceptionState&); |
| ScriptPromise cancel(ScriptState*, ScriptValue reason, ExceptionState&); |
| |
| // 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&); |
| |
| // |
| // Readable stream reader abstract operations |
| // |
| |
| // https://streams.spec.whatwg.org/#readable-stream-default-reader-read |
| static StreamPromiseResolver* Read(ScriptState* script_state, |
| ReadableStreamReader* reader); |
| |
| // https://streams.spec.whatwg.org/#readable-stream-reader-generic-release |
| static void GenericRelease(ScriptState*, ReadableStreamReader*); |
| |
| StreamPromiseResolver* ClosedPromise() { return closed_promise_; } |
| |
| void Trace(Visitor*) override; |
| |
| private: |
| friend class ReadableStreamDefaultController; |
| friend class ReadableStream; |
| |
| // https://streams.spec.whatwg.org/#readable-stream-reader-generic-cancel |
| static v8::Local<v8::Promise> GenericCancel(ScriptState*, |
| ReadableStreamReader*, |
| v8::Local<v8::Value> reason); |
| |
| // https://streams.spec.whatwg.org/#readable-stream-reader-generic-initialize |
| static void GenericInitialize(ScriptState*, |
| ReadableStreamReader*, |
| ReadableStream*); |
| |
| Member<StreamPromiseResolver> closed_promise_; |
| bool for_author_code_ = true; |
| Member<ReadableStream> owner_readable_stream_; |
| HeapDeque<Member<StreamPromiseResolver>> read_requests_; |
| }; |
| |
| } // namespace blink |
| |
| #endif // THIRD_PARTY_BLINK_RENDERER_CORE_STREAMS_READABLE_STREAM_READER_H_ |