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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_ReadableStreamDefaultReader_h
+#define mozilla_dom_ReadableStreamDefaultReader_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/ReadRequest.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsISupports.h"
+#include "nsWrapperCache.h"
+#include "mozilla/LinkedList.h"
+
+namespace mozilla::dom {
+
+class Promise;
+class ReadableStream;
+
+// https://streams.spec.whatwg.org/#default-reader-read
+struct Read_ReadRequest : public ReadRequest {
+ public:
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(Read_ReadRequest, ReadRequest)
+
+ RefPtr<Promise> mPromise;
+
+ explicit Read_ReadRequest(Promise* aPromise) : mPromise(aPromise) {}
+
+ void ChunkSteps(JSContext* aCx, JS::Handle<JS::Value> aChunk,
+ ErrorResult& aRv) override;
+
+ void CloseSteps(JSContext* aCx, ErrorResult& aRv) override;
+
+ void ErrorSteps(JSContext* aCx, JS::Handle<JS::Value> e,
+ ErrorResult& aRv) override;
+
+ protected:
+ ~Read_ReadRequest() override = default;
+};
+
+class ReadableStreamDefaultReader final : public ReadableStreamGenericReader,
+ public nsWrapperCache
+
+{
+ public:
+ NS_DECL_ISUPPORTS_INHERITED
+ NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS_INHERITED(
+ ReadableStreamDefaultReader, ReadableStreamGenericReader)
+
+ public:
+ explicit ReadableStreamDefaultReader(nsISupports* aGlobal);
+
+ protected:
+ ~ReadableStreamDefaultReader() override;
+
+ public:
+ bool IsDefault() override { return true; }
+ bool IsBYOB() override { return false; }
+ ReadableStreamDefaultReader* AsDefault() override { return this; }
+ ReadableStreamBYOBReader* AsBYOB() override {
+ MOZ_CRASH();
+ return nullptr;
+ }
+
+ // Public functions to implement other specs
+ // https://streams.spec.whatwg.org/#other-specs-rs-create
+
+ // The following algorithms can be used on arbitrary ReadableStream instances,
+ // including ones that are created by web developers. They can all fail in
+ // various operation-specific ways, and these failures should be handled by
+ // the calling specification.
+
+ // https://streams.spec.whatwg.org/#readablestreamdefaultreader-read-a-chunk
+ MOZ_CAN_RUN_SCRIPT void ReadChunk(JSContext* aCx, ReadRequest& aRequest,
+ ErrorResult& aRv);
+
+ // IDL layer functions
+
+ JSObject* WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) override;
+
+ // IDL methods
+
+ static already_AddRefed<ReadableStreamDefaultReader> Constructor(
+ const GlobalObject& aGlobal, ReadableStream& stream, ErrorResult& aRv);
+
+ MOZ_CAN_RUN_SCRIPT already_AddRefed<Promise> Read(ErrorResult& aRv);
+
+ void ReleaseLock(ErrorResult& aRv);
+
+ LinkedList<RefPtr<ReadRequest>>& ReadRequests() { return mReadRequests; }
+
+ private:
+ LinkedList<RefPtr<ReadRequest>> mReadRequests = {};
+};
+
+namespace streams_abstract {
+
+void SetUpReadableStreamDefaultReader(ReadableStreamDefaultReader* aReader,
+ ReadableStream* aStream,
+ ErrorResult& aRv);
+
+void ReadableStreamDefaultReaderErrorReadRequests(
+ JSContext* aCx, ReadableStreamDefaultReader* aReader,
+ JS::Handle<JS::Value> aError, ErrorResult& aRv);
+
+void ReadableStreamDefaultReaderRelease(JSContext* aCx,
+ ReadableStreamDefaultReader* aReader,
+ ErrorResult& aRv);
+
+} // namespace streams_abstract
+
+} // namespace mozilla::dom
+
+#endif // mozilla_dom_ReadableStreamDefaultReader_h