File: curtain_mode_win.cc

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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "remoting/host/curtain_mode.h"

#include <windows.h>

#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/task/single_thread_task_runner.h"
#include "remoting/host/client_session_control.h"

namespace remoting {

class CurtainModeWin : public CurtainMode {
 public:
  CurtainModeWin();

  CurtainModeWin(const CurtainModeWin&) = delete;
  CurtainModeWin& operator=(const CurtainModeWin&) = delete;

  // Overriden from CurtainMode.
  bool Activate() override;
};

CurtainModeWin::CurtainModeWin() {}

bool CurtainModeWin::Activate() {
  DWORD session_id;
  if (!ProcessIdToSessionId(GetCurrentProcessId(), &session_id)) {
    PLOG(ERROR) << "Failed to map the current PID to session ID";
    return false;
  }

  // The current session is curtained if it is not attached to the local
  // console.
  return WTSGetActiveConsoleSessionId() != session_id;
}

// static
std::unique_ptr<CurtainMode> CurtainMode::Create(
    scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
    base::WeakPtr<ClientSessionControl> client_session_control) {
  // |client_session_control| is not used because the client session is
  // disconnected as soon as the session is re-attached to the local console.
  // See RdpDesktopSession for more details.
  return base::WrapUnique(new CurtainModeWin());
}

}  // namespace remoting