File: PresentationTCPSessionTransport.h

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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_PresentationSessionTransport_h
#define mozilla_dom_PresentationSessionTransport_h

#include "mozilla/RefPtr.h"
#include "nsCOMPtr.h"
#include "nsIAsyncInputStream.h"
#include "nsIPresentationSessionTransport.h"
#include "nsIPresentationSessionTransportBuilder.h"
#include "nsIStreamListener.h"
#include "nsISupportsImpl.h"
#include "nsITransport.h"

class nsISocketTransport;
class nsIInputStreamPump;
class nsIScriptableInputStream;
class nsIMultiplexInputStream;
class nsIAsyncStreamCopier;
class nsIInputStream;

namespace mozilla {
namespace dom {

/*
 * App-to-App transport channel for the presentation session. It's usually
 * initialized with an |InitWithSocketTransport| call if at the presenting
 * sender side; whereas it's initialized with an |InitWithChannelDescription| if
 * at the presenting receiver side. The lifetime is managed in either
 * |PresentationControllingInfo| (sender side) or |PresentationPresentingInfo|
 * (receiver side) in PresentationSessionInfo.cpp.
 */
class PresentationTCPSessionTransport final
    : public nsIPresentationSessionTransport,
      public nsIPresentationTCPSessionTransportBuilder,
      public nsITransportEventSink,
      public nsIInputStreamCallback,
      public nsIStreamListener {
 public:
  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(PresentationTCPSessionTransport,
                                           nsIPresentationSessionTransport)

  NS_DECL_NSIPRESENTATIONSESSIONTRANSPORT
  NS_DECL_NSIPRESENTATIONSESSIONTRANSPORTBUILDER
  NS_DECL_NSIPRESENTATIONTCPSESSIONTRANSPORTBUILDER
  NS_DECL_NSITRANSPORTEVENTSINK
  NS_DECL_NSIINPUTSTREAMCALLBACK
  NS_DECL_NSIREQUESTOBSERVER
  NS_DECL_NSISTREAMLISTENER

  PresentationTCPSessionTransport();

  void NotifyCopyComplete(nsresult aStatus);

 private:
  ~PresentationTCPSessionTransport();

  nsresult CreateStream();

  nsresult CreateInputStreamPump();

  nsresult EnsureCopying();

  enum class ReadyState { CONNECTING, OPEN, CLOSING, CLOSED };

  void SetReadyState(ReadyState aReadyState);

  bool IsReadyToNotifyData() {
    return mDataNotificationEnabled && mReadyState == ReadyState::OPEN;
  }

  ReadyState mReadyState;
  bool mAsyncCopierActive;
  nsresult mCloseStatus;
  bool mDataNotificationEnabled;

  uint8_t mRole = 0;

  // Raw socket streams
  nsCOMPtr<nsISocketTransport> mTransport;
  nsCOMPtr<nsIInputStream> mSocketInputStream;
  nsCOMPtr<nsIOutputStream> mSocketOutputStream;

  // Input stream machinery
  nsCOMPtr<nsIInputStreamPump> mInputStreamPump;
  nsCOMPtr<nsIScriptableInputStream> mInputStreamScriptable;

  nsCOMPtr<nsIPresentationSessionTransportCallback> mCallback;
  nsCOMPtr<nsIPresentationSessionTransportBuilderListener> mListener;

  // The data to be sent.
  nsTArray<nsCOMPtr<nsIInputStream>> mPendingData;
};

}  // namespace dom
}  // namespace mozilla

#endif  // mozilla_dom_PresentationSessionTransport_h