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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_ReadableStreamTee_h
#define mozilla_dom_ReadableStreamTee_h
#include "mozilla/dom/ReadRequest.h"
#include "mozilla/dom/ReadableStreamControllerBase.h"
#include "mozilla/dom/UnderlyingSourceCallbackHelpers.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsImpl.h"
namespace mozilla::dom {
struct TeeState;
enum class TeeBranch : bool;
class ReadableStream;
// Implementation of the Pull algorithm steps for ReadableStreamDefaultTee,
// from
// https://streams.spec.whatwg.org/#abstract-opdef-readablestreamdefaulttee
// Step 12.
class ReadableStreamDefaultTeeSourceAlgorithms final
: public UnderlyingSourceAlgorithmsBase {
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(
ReadableStreamDefaultTeeSourceAlgorithms, UnderlyingSourceAlgorithmsBase)
ReadableStreamDefaultTeeSourceAlgorithms(TeeState* aTeeState,
TeeBranch aBranch)
: mTeeState(aTeeState), mBranch(aBranch) {}
MOZ_CAN_RUN_SCRIPT void StartCallback(
JSContext* aCx, ReadableStreamControllerBase& aController,
JS::MutableHandle<JS::Value> aRetVal, ErrorResult& aRv) override {
aRetVal.setUndefined();
}
MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> PullCallback(
JSContext* aCx, ReadableStreamControllerBase& aController,
ErrorResult& aRv) override;
MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> CancelCallback(
JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
ErrorResult& aRv) override;
protected:
~ReadableStreamDefaultTeeSourceAlgorithms() override = default;
private:
// Virtually const, but is cycle collected
MOZ_KNOWN_LIVE RefPtr<TeeState> mTeeState;
TeeBranch mBranch;
};
// https://streams.spec.whatwg.org/#abstract-opdef-readablestreamdefaulttee
// Step 12.3
struct ReadableStreamDefaultTeeReadRequest final : public ReadRequest {
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ReadableStreamDefaultTeeReadRequest,
ReadRequest)
RefPtr<TeeState> mTeeState;
explicit ReadableStreamDefaultTeeReadRequest(TeeState* aTeeState)
: mTeeState(aTeeState) {}
void ChunkSteps(JSContext* aCx, JS::Handle<JS::Value> aChunk,
ErrorResult& aRv) override;
MOZ_CAN_RUN_SCRIPT void CloseSteps(JSContext* aCx, ErrorResult& aRv) override;
void ErrorSteps(JSContext* aCx, JS::Handle<JS::Value> aError,
ErrorResult& aRv) override;
protected:
~ReadableStreamDefaultTeeReadRequest() override = default;
};
namespace streams_abstract {
MOZ_CAN_RUN_SCRIPT void ReadableByteStreamTee(
JSContext* aCx, ReadableStream* aStream,
nsTArray<RefPtr<ReadableStream>>& aResult, ErrorResult& aRv);
}
} // namespace mozilla::dom
#endif
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