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// 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_WIN_WTS_TERMINAL_MONITOR_H_
#define REMOTING_HOST_WIN_WTS_TERMINAL_MONITOR_H_
#include <string>
#include "base/basictypes.h"
#include "base/strings/utf_string_conversions.h"
namespace remoting {
class WtsTerminalObserver;
// Session id that does not represent any session.
extern const uint32 kInvalidSessionId;
class WtsTerminalMonitor {
public:
// The console terminal ID.
static const char* kConsole;
virtual ~WtsTerminalMonitor();
// Registers an observer to receive notifications about a particular WTS
// terminal. |terminal_id| is used to specify an RdpClient instance for which
// the connected session should be monitored, or |kConsole| may be passed to
// monitor the console session.
//
// Each observer instance can monitor a single WTS console. Returns
// |true| of success. Returns |false| if |observer| is already registered.
virtual bool AddWtsTerminalObserver(const std::string& terminal_id,
WtsTerminalObserver* observer) = 0;
// Unregisters a previously registered observer.
virtual void RemoveWtsTerminalObserver(WtsTerminalObserver* observer) = 0;
// Returns ID of the terminal connected to |session_id| in |*terminal_id|.
// Returns false if |session_id| is not attached to the physical console or
// does not have an assigned terminal ID.
static bool LookupTerminalId(uint32 session_id, std::string* terminal_id);
// Returns ID of the session that |terminal_id| is attached.
// |kInvalidSessionId| is returned if none of the sessions is currently
// attahced to |client_endpoint|.
static uint32 LookupSessionId(const std::string& terminal_id);
protected:
WtsTerminalMonitor();
private:
DISALLOW_COPY_AND_ASSIGN(WtsTerminalMonitor);
};
} // namespace remoting
#endif // REMOTING_HOST_WIN_WTS_TERMINAL_MONITOR_H_
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