Calling SendSAS() from a service yo make sure that Secure Attention Sequence can be injected even w…

remoting/host/win/session_event_executor.h

 // 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_SESSION_EVENT_EXECUTOR_H_
 #define REMOTING_HOST_WIN_SESSION_EVENT_EXECUTOR_H_
 
 #include <set>
 
 #include "base/basictypes.h"
+#include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "remoting/host/event_executor.h"
 #include "remoting/host/win/scoped_thread_desktop.h"
 
 namespace base {
 class SingleThreadTaskRunner;
 } // namespace base
 
 namespace remoting {
 
 class SasInjector;
 
+// Monitors and passes key/mouse events to a nested event executor. Injects
+// Secure Attention Sequence (SAS) when Ctrl+Alt+Del key combination has been
+// detected.
 class SessionEventExecutorWin : public EventExecutor {
  public:
+  // |inject_sas| is invoked on |inject_sas_task_runner| to generate SAS on
+  // Vista+.
   SessionEventExecutorWin(
-      scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
-      scoped_ptr<EventExecutor> nested_executor);
+      scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
+      scoped_ptr<EventExecutor> nested_executor,
+      scoped_refptr<base::SingleThreadTaskRunner> inject_sas_task_runner,
+      const base::Closure& inject_sas);
   ~SessionEventExecutorWin();
 
   // EventExecutor implementation.
   virtual void Start(
       scoped_ptr<protocol::ClipboardStub> client_clipboard) OVERRIDE;
   virtual void StopAndDelete() OVERRIDE;
 
   // protocol::ClipboardStub implementation.
   virtual void InjectClipboardEvent(
       const protocol::ClipboardEvent& event) OVERRIDE;
 
   // protocol::InputStub implementation.
   virtual void InjectKeyEvent(const protocol::KeyEvent& event) OVERRIDE;
   virtual void InjectMouseEvent(const protocol::MouseEvent& event) OVERRIDE;
 
  private:
   // Switches to the desktop receiving a user input if different from
   // the current one.
   void SwitchToInputDesktop();
 
+  scoped_refptr<base::SingleThreadTaskRunner> input_task_runner_;
+
   // Pointer to the next event executor.
   scoped_ptr<EventExecutor> nested_executor_;
 
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> inject_sas_task_runner_;
 
   ScopedThreadDesktop desktop_;
 
+  // Used to inject Secure Attention Sequence on Vista+.
+  base::Closure inject_sas_;
+
+  // Used to inject Secure Attention Sequence on XP.
   scoped_ptr<SasInjector> sas_injector_;
 
   // Keys currently pressed by the client, used to detect Ctrl-Alt-Del.
   std::set<uint32> pressed_keys_;
 
   base::WeakPtrFactory<SessionEventExecutorWin> weak_ptr_factory_;
   base::WeakPtr<SessionEventExecutorWin> weak_ptr_;
 
   DISALLOW_COPY_AND_ASSIGN(SessionEventExecutorWin);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WIN_SESSION_EVENT_EXECUTOR_H_