text: // Copyright (c) 2012 The Chromium Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  
  #ifndef REMOTING_HOST_CURTAIN_MODE_H_
  #define REMOTING_HOST_CURTAIN_MODE_H_
  
  #include <memory>
  
  #include "base/compiler_specific.h"
  #include "base/memory/ref_counted.h"
  #include "base/memory/weak_ptr.h"
  
  namespace base {
  class SingleThreadTaskRunner;
  }  // namespace base
  
  namespace remoting {
  
  class ClientSessionControl;
  
  class CurtainMode {
   public:
    CurtainMode(const CurtainMode&) = delete;
    CurtainMode& operator=(const CurtainMode&) = delete;
  
    virtual ~CurtainMode() {}
  
    // Creates a platform-specific curtain mode implementation object that
    // "curtains" the current session making sure it is not accessible from
    // the local console. |client_session_control| can be used to drop
    // the connection in the case if the session re-connects to the local console
    // in mid-flight.
    static std::unique_ptr<CurtainMode> Create(
        scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
        scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
        base::WeakPtr<ClientSessionControl> client_session_control);
  
    // Activates the curtain mode. Returns true if successful.
    virtual bool Activate() = 0;
  
   protected:
    CurtainMode() {}
  };
  
  }  // namespace remoting
  
  #endif  // REMOTING_HOST_CURTAIN_MODE_H_
  