mirror of
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92 lines
3.2 KiB
C++
92 lines
3.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_dom_ReadableStreamTee_h
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#define mozilla_dom_ReadableStreamTee_h
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#include "mozilla/dom/ReadRequest.h"
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#include "mozilla/dom/ReadableStreamController.h"
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#include "mozilla/dom/UnderlyingSourceCallbackHelpers.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsISupportsImpl.h"
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namespace mozilla::dom {
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struct TeeState;
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enum class TeeBranch : bool;
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class ReadableStream;
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// Implementation of the Pull algorithm steps for ReadableStreamDefaultTee,
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// from
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// https://streams.spec.whatwg.org/#abstract-opdef-readablestreamdefaulttee
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// Step 12.
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class ReadableStreamDefaultTeeSourceAlgorithms final
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: public UnderlyingSourceAlgorithmsBase {
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(
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ReadableStreamDefaultTeeSourceAlgorithms, UnderlyingSourceAlgorithmsBase)
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ReadableStreamDefaultTeeSourceAlgorithms(TeeState* aTeeState,
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TeeBranch aBranch)
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: mTeeState(aTeeState), mBranch(aBranch) {}
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MOZ_CAN_RUN_SCRIPT void StartCallback(JSContext* aCx,
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ReadableStreamController& aController,
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JS::MutableHandle<JS::Value> aRetVal,
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ErrorResult& aRv) override {
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aRetVal.setUndefined();
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}
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MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> PullCallback(
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JSContext* aCx, ReadableStreamController& aController,
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ErrorResult& aRv) override;
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MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> CancelCallback(
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JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
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ErrorResult& aRv) override;
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protected:
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~ReadableStreamDefaultTeeSourceAlgorithms() override = default;
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private:
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// Virtually const, but is cycle collected
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MOZ_KNOWN_LIVE RefPtr<TeeState> mTeeState;
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TeeBranch mBranch;
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};
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// https://streams.spec.whatwg.org/#abstract-opdef-readablestreamdefaulttee
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// Step 12.3
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struct ReadableStreamDefaultTeeReadRequest final : public ReadRequest {
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(ReadableStreamDefaultTeeReadRequest,
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ReadRequest)
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RefPtr<TeeState> mTeeState;
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explicit ReadableStreamDefaultTeeReadRequest(TeeState* aTeeState)
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: mTeeState(aTeeState) {}
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void ChunkSteps(JSContext* aCx, JS::Handle<JS::Value> aChunk,
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ErrorResult& aRv) override;
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MOZ_CAN_RUN_SCRIPT void CloseSteps(JSContext* aCx, ErrorResult& aRv) override;
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void ErrorSteps(JSContext* aCx, JS::Handle<JS::Value> aError,
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ErrorResult& aRv) override;
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protected:
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~ReadableStreamDefaultTeeReadRequest() override = default;
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};
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namespace streams_abstract {
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MOZ_CAN_RUN_SCRIPT void ReadableByteStreamTee(
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JSContext* aCx, ReadableStream* aStream,
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nsTArray<RefPtr<ReadableStream>>& aResult, ErrorResult& aRv);
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}
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} // namespace mozilla::dom
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#endif
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