Curtain mode implementation for Mac OS X.

remoting/host/curtain_mode_mac.h

Index: remoting/host/curtain_mode_mac.h
diff --git a/remoting/host/curtain_mode_mac.h b/remoting/host/curtain_mode_mac.h
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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:
+  CurtainMode();
+  virtual ~CurtainMode();
+
+  // Set the callback to be invoked when the switched-out remote session is
+  // switched back to the console.  Typically, remote connections should be
+  // closed in this event to make sure that only one connection (console or
+  // remote) exists to a session at any time to ensure privacy.  Note that
+  // only the session's owner (or someone who knows the owner's password)
+  // can attach it to the console, so this is safe.
+  bool Init(const base::Closure& on_session_activate);
+
+  // Overridden from HostStatusObserver
+  virtual void OnClientAuthenticated(const std::string& jid) OVERRIDE;
+
+ private:
+  static OSStatus SessionActivateHandler(EventHandlerCallRef handler,
+                                         EventRef event,
+                                         void* user_data);
+  void OnSessionActivate();
+
+  base::Closure on_session_activate_;
+  EventHandlerRef event_handler_;
+};
+
+}
+
+#endif