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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_ReadableStreamController_h
+#define mozilla_dom_ReadableStreamController_h
+
+#include "mozilla/ErrorResult.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIGlobalObject.h"
+#include "nsISupports.h"
+#include "UnderlyingSourceCallbackHelpers.h"
+
+namespace mozilla::dom {
+struct ReadRequest;
+class ReadableStream;
+class ReadableStreamDefaultController;
+class ReadableByteStreamController;
+
+class ReadableStreamController : public nsISupports {
+ public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_CLASS(ReadableStreamController)
+
+ ReadableStreamController(nsIGlobalObject* aGlobal);
+
+ nsIGlobalObject* GetParentObject() const { return mGlobal; }
+
+ virtual bool IsDefault() = 0;
+ virtual bool IsByte() = 0;
+ virtual ReadableStreamDefaultController* AsDefault() = 0;
+ virtual ReadableByteStreamController* AsByte() = 0;
+
+ MOZ_CAN_RUN_SCRIPT
+ virtual already_AddRefed<Promise> CancelSteps(JSContext* aCx,
+ JS::Handle<JS::Value> aReason,
+ ErrorResult& aRv) = 0;
+ MOZ_CAN_RUN_SCRIPT
+ virtual void PullSteps(JSContext* aCx, ReadRequest* aReadRequest,
+ ErrorResult& aRv) = 0;
+
+ // No JS implementable UnderlyingSource callback exists for this.
+ virtual void ReleaseSteps() = 0;
+
+ UnderlyingSourceAlgorithmsBase* GetAlgorithms() const { return mAlgorithms; }
+ void SetAlgorithms(UnderlyingSourceAlgorithmsBase& aAlgorithms) {
+ mAlgorithms = &aAlgorithms;
+ }
+ void ClearAlgorithms() {
+ MOZ_ASSERT(mAlgorithms);
+ mAlgorithms->ReleaseObjects();
+ mAlgorithms = nullptr;
+ }
+
+ ReadableStream* Stream() const { return mStream; }
+ void SetStream(ReadableStream* aStream);
+
+ protected:
+ nsCOMPtr<nsIGlobalObject> mGlobal;
+
+ // The algorithms for the underlying source
+ RefPtr<UnderlyingSourceAlgorithmsBase> mAlgorithms;
+
+ RefPtr<ReadableStream> mStream;
+
+ virtual ~ReadableStreamController() = default;
+};
+
+} // namespace mozilla::dom
+
+#endif