зеркало из https://github.com/mozilla/gecko-dev.git
116 строки
4.3 KiB
C++
116 строки
4.3 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 DOM_STREAMS_TRANSFORMSTREAM_H_
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#define DOM_STREAMS_TRANSFORMSTREAM_H_
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#include "TransformStreamDefaultController.h"
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#include "mozilla/dom/BindingDeclarations.h"
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#include "mozilla/dom/QueuingStrategyBinding.h"
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#include "mozilla/dom/TransformerBinding.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsWrapperCache.h"
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namespace mozilla::dom {
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class WritableStream;
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class ReadableStream;
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class UniqueMessagePortId;
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class MessagePort;
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class TransformerAlgorithmsWrapper;
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class TransformStream final : public nsISupports, public nsWrapperCache {
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(TransformStream)
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// https://streams.spec.whatwg.org/#transformstream-set-up
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// Intended to be used by interfaces using GenericTransformStream mixin.
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MOZ_CAN_RUN_SCRIPT static already_AddRefed<TransformStream> CreateGeneric(
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const GlobalObject& aGlobal, TransformerAlgorithmsWrapper& aAlgorithms,
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ErrorResult& aRv);
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// Internal slot accessors
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bool Backpressure() const { return mBackpressure; }
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Promise* BackpressureChangePromise() { return mBackpressureChangePromise; }
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void SetBackpressure(bool aBackpressure);
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MOZ_KNOWN_LIVE TransformStreamDefaultController* Controller() {
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return mController;
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}
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void SetController(TransformStreamDefaultController& aController) {
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MOZ_ASSERT(!mController);
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mController = &aController;
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}
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// [Transferable]
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// https://html.spec.whatwg.org/multipage/structured-data.html#transfer-steps
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MOZ_CAN_RUN_SCRIPT bool Transfer(JSContext* aCx,
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UniqueMessagePortId& aPortId1,
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UniqueMessagePortId& aPortId2);
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// https://html.spec.whatwg.org/multipage/structured-data.html#transfer-receiving-steps
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static MOZ_CAN_RUN_SCRIPT bool ReceiveTransfer(
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JSContext* aCx, nsIGlobalObject* aGlobal, MessagePort& aPort1,
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MessagePort& aPort2, JS::MutableHandle<JSObject*> aReturnObject);
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protected:
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TransformStream(nsIGlobalObject* aGlobal, ReadableStream* aReadable,
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WritableStream* aWritable);
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explicit TransformStream(nsIGlobalObject* aGlobal);
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~TransformStream();
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MOZ_CAN_RUN_SCRIPT void Initialize(
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JSContext* aCx, Promise* aStartPromise, double aWritableHighWaterMark,
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QueuingStrategySize* aWritableSizeAlgorithm,
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double aReadableHighWaterMark,
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QueuingStrategySize* aReadableSizeAlgorithm, ErrorResult& aRv);
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public:
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nsIGlobalObject* GetParentObject() const { return mGlobal; }
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JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) override;
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// WebIDL methods
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// TODO: Mark as MOZ_CAN_RUN_SCRIPT when IDL constructors can be (bug 1749042)
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MOZ_CAN_RUN_SCRIPT_BOUNDARY static already_AddRefed<TransformStream>
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Constructor(const GlobalObject& aGlobal,
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const Optional<JS::Handle<JSObject*>>& aTransformer,
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const QueuingStrategy& aWritableStrategy,
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const QueuingStrategy& aReadableStrategy, ErrorResult& aRv);
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ReadableStream* Readable() const { return mReadable; }
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WritableStream* Writable() const { return mWritable; }
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private:
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nsCOMPtr<nsIGlobalObject> mGlobal;
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// Internal slots
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// MOZ_KNOWN_LIVE for slots that will never be reassigned
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bool mBackpressure = false;
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RefPtr<Promise> mBackpressureChangePromise;
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RefPtr<TransformStreamDefaultController> mController;
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RefPtr<ReadableStream> mReadable;
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RefPtr<WritableStream> mWritable;
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};
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namespace streams_abstract {
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MOZ_CAN_RUN_SCRIPT void TransformStreamErrorWritableAndUnblockWrite(
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JSContext* aCx, TransformStream* aStream, JS::Handle<JS::Value> aError,
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ErrorResult& aRv);
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MOZ_CAN_RUN_SCRIPT void TransformStreamError(JSContext* aCx,
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TransformStream* aStream,
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JS::Handle<JS::Value> aError,
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ErrorResult& aRv);
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} // namespace streams_abstract
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} // namespace mozilla::dom
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#endif // DOM_STREAMS_TRANSFORMSTREAM_H_
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