forked from mirrors/gecko-dev
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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_FetchStreamReader_h
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#define mozilla_dom_FetchStreamReader_h
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#include "jsapi.h"
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#include "mozilla/dom/FetchBinding.h"
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#include "mozilla/dom/PromiseNativeHandler.h"
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#include "nsIAsyncOutputStream.h"
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namespace mozilla {
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namespace dom {
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class WeakWorkerRef;
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class FetchStreamReader final : public nsIOutputStreamCallback
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, public PromiseNativeHandler
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{
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_AMBIGUOUS(FetchStreamReader, nsIOutputStreamCallback)
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NS_DECL_NSIOUTPUTSTREAMCALLBACK
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// This creates a nsIInputStream able to retrieve data from the ReadableStream
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// object. The reading starts when StartConsuming() is called.
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static nsresult
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Create(JSContext* aCx, nsIGlobalObject* aGlobal,
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FetchStreamReader** aStreamReader,
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nsIInputStream** aInputStream);
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void
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ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
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void
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RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
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// Idempotently close the output stream and null out all state. If aCx is
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// provided, the reader will also be canceled. aStatus must be a DOM error
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// as understood by DOMException because it will be provided as the
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// cancellation reason.
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void
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CloseAndRelease(JSContext* aCx, nsresult aStatus);
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void
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StartConsuming(JSContext* aCx,
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JS::HandleObject aStream,
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JS::MutableHandle<JSObject*> aReader,
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ErrorResult& aRv);
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private:
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explicit FetchStreamReader(nsIGlobalObject* aGlobal);
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~FetchStreamReader();
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nsresult
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WriteBuffer();
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void
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ReportErrorToConsole(JSContext* aCx, JS::Handle<JS::Value> aValue);
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nsCOMPtr<nsIGlobalObject> mGlobal;
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nsCOMPtr<nsIEventTarget> mOwningEventTarget;
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nsCOMPtr<nsIAsyncOutputStream> mPipeOut;
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RefPtr<WeakWorkerRef> mWorkerRef;
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JS::Heap<JSObject*> mReader;
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UniquePtr<FetchReadableStreamReadDataArray> mBuffer;
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uint32_t mBufferRemaining;
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uint32_t mBufferOffset;
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bool mStreamClosed;
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};
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} // dom namespace
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} // mozilla namespace
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#endif // mozilla_dom_FetchStreamReader_h
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