ReadableStreamBYOBReader.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim:set ts=2 sw=2 sts=2 et cindent: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_ReadableStreamBYOBReader_h

#define mozilla_dom_ReadableStreamBYOBReader_h

#include "js/TypeDecls.h"

#include "mozilla/Attributes.h"

#include "mozilla/ErrorResult.h"

#include "mozilla/dom/BindingDeclarations.h"

#include "mozilla/dom/ReadableStreamGenericReader.h"

#include "mozilla/dom/TypedArray.h"

#include "nsCycleCollectionParticipant.h"

#include "nsWrapperCache.h"

#include "mozilla/LinkedList.h"

namespace mozilla::dom {

class Promise;

struct ReadIntoRequest;

class ReadableStream;

}  // namespace mozilla::dom

namespace mozilla::dom {

class ReadableStreamBYOBReader final : public ReadableStreamGenericReader,

                                       public nsWrapperCache {

 public:

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS_INHERITED(

      ReadableStreamBYOBReader, ReadableStreamGenericReader)

 public:

  explicit ReadableStreamBYOBReader(nsISupports* aGlobal);

  bool IsDefault() override { return false; };

  bool IsBYOB() override { return true; }

  ReadableStreamDefaultReader* AsDefault() override {

    MOZ_CRASH("Should have verified IsDefault first");

    return nullptr;

  ReadableStreamBYOBReader* AsBYOB() override { return this; }

  JSObject* WrapObject(JSContext* aCx,

                       JS::Handle<JSObject*> aGivenProto) override;

  static already_AddRefed<ReadableStreamBYOBReader> Constructor(

      const GlobalObject& global, ReadableStream& stream, ErrorResult& rv);

  MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> Read(

      const ArrayBufferView& aArray, ErrorResult& rv);

  void ReleaseLock(ErrorResult& rv);

  LinkedList<RefPtr<ReadIntoRequest>>& ReadIntoRequests() {

    return mReadIntoRequests;

 private:

  ~ReadableStreamBYOBReader() override = default;

  LinkedList<RefPtr<ReadIntoRequest>> mReadIntoRequests;

};

namespace streams_abstract {

already_AddRefed<ReadableStreamBYOBReader> AcquireReadableStreamBYOBReader(

    ReadableStream* aStream, ErrorResult& aRv);

MOZ_CAN_RUN_SCRIPT void ReadableStreamBYOBReaderRead(

    JSContext* aCx, ReadableStreamBYOBReader* aReader,

    JS::Handle<JSObject*> aView, ReadIntoRequest* aReadIntoRequest,

    ErrorResult& aRv);

void ReadableStreamBYOBReaderErrorReadIntoRequests(

    JSContext* aCx, ReadableStreamBYOBReader* aReader,

    JS::Handle<JS::Value> aError, ErrorResult& aRv);

void ReadableStreamBYOBReaderRelease(JSContext* aCx,

                                     ReadableStreamBYOBReader* aReader,

                                     ErrorResult& aRv);

}  // namespace streams_abstract

}  // namespace mozilla::dom

#endif  // mozilla_dom_ReadableStreamBYOBReader_h