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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_CURTAIN_MODE_MAC_H_
#define REMOTING_HOST_CURTAIN_MODE_MAC_H_
#include <Carbon/Carbon.h>
#include <string>
#include "base/callback.h"
#include "base/compiler_specific.h"
#include "remoting/host/host_status_observer.h"
namespace remoting {
class CurtainMode : public HostStatusObserver {
public:
// Set callbacks to be invoked when the switched-out session is switched back
// to the console, or in case of errors activating curtain-mode. Typically,
// remote clients should be disconnected in both cases: for errors, because
// the privacy guarantee of curtain-mode cannot be honoured; for switch-in,
// to ensure that only one connection (console or remote) exists to a session.
// Note that only the session's owner (or someone who knows the password) can
// attach it to the console, so this is safe.
CurtainMode(const base::Closure& on_session_activate,
const base::Closure& on_error);
virtual ~CurtainMode();
// Enable or disable curtain-mode. Note that disabling curtain-mode does not
// deactivate the curtain, but it does remove the switch-in handler, meaning
// that on_session_activate will not be invoked if curtain-mode is disabled.
// Conversely, enabling curtain-mode *does* activate the curtain if there is
// a connected client at the time.
void SetEnabled(bool enabled);
// Overridden from HostStatusObserver
virtual void OnClientAuthenticated(const std::string& jid) OVERRIDE;
virtual void OnClientDisconnected(const std::string& jid) OVERRIDE;
private:
// If the current session is attached to the console and is not showing
// the logon screen then switch it out to ensure privacy.
bool ActivateCurtain();
// Add or remove the switch-in event handler.
bool InstallEventHandler();
bool RemoveEventHandler();
// Handlers for the switch-in event.
static OSStatus SessionActivateHandler(EventHandlerCallRef handler,
EventRef event,
void* user_data);
void OnSessionActivate();
base::Closure on_session_activate_;
base::Closure on_error_;
bool connection_active_;
EventHandlerRef event_handler_;
};
}
#endif
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