third_party/WebKit/Source/modules/peerconnection/RTCSessionDescriptionRequestImpl.h

/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer
 *    in the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name of Google Inc. nor the names of its contributors
 *    may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 */

#ifndef RTCSessionDescriptionRequestImpl_h
#define RTCSessionDescriptionRequestImpl_h

#include "base/memory/scoped_refptr.h"
#include "bindings/modules/v8/v8_rtc_peer_connection_error_callback.h"
#include "bindings/modules/v8/v8_rtc_session_description_callback.h"
#include "core/dom/ContextLifecycleObserver.h"
#include "platform/heap/Handle.h"
#include "platform/peerconnection/RTCSessionDescriptionRequest.h"

namespace blink {

class RTCPeerConnection;
class WebRTCSessionDescription;

class RTCSessionDescriptionRequestImpl final
    : public RTCSessionDescriptionRequest,
      public ContextLifecycleObserver {
  USING_GARBAGE_COLLECTED_MIXIN(RTCSessionDescriptionRequestImpl);

 public:
  static RTCSessionDescriptionRequestImpl* Create(
      ExecutionContext*,
      RTCPeerConnection*,
      V8RTCSessionDescriptionCallback*,
      V8RTCPeerConnectionErrorCallback*);
  ~RTCSessionDescriptionRequestImpl() override;

  void RequestSucceeded(const WebRTCSessionDescription&) override;
  void RequestFailed(const String& error) override;

  // ContextLifecycleObserver
  void ContextDestroyed(ExecutionContext*) override;

  virtual void Trace(blink::Visitor*);

 private:
  RTCSessionDescriptionRequestImpl(ExecutionContext*,
                                   RTCPeerConnection*,
                                   V8RTCSessionDescriptionCallback*,
                                   V8RTCPeerConnectionErrorCallback*);

  void Clear();

  // This request object is held by WebRTCPeerConnectionHandler, which doesn't
  // support wrapper-tracing. Thus, this object holds the underlying callback
  // functions as persistent handles. This is acceptable because the request
  // object will be discarded in a limited time due to success, failure, or
  // destruction of the execution context.
  V8RTCSessionDescriptionCallback::Persistent<V8RTCSessionDescriptionCallback>
      success_callback_;
  V8RTCPeerConnectionErrorCallback::Persistent<V8RTCPeerConnectionErrorCallback>
      error_callback_;
  Member<RTCPeerConnection> requester_;
};

}  // namespace blink

#endif  // RTCSessionDescriptionRequestImpl_h