1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CHROME_FRAME_BHO_LOADER_H_ 6 #define CHROME_FRAME_BHO_LOADER_H_ 7 8 #include <windows.h> 9 10 // Forward. 11 class EventHooker; 12 13 // This class simulates BHO loading in an IE process. It watches for the 14 // creation of a specific window and then retrieves the web browser object 15 // for that window and simulates loading of the BHO. 16 class BHOLoader { 17 public: 18 BHOLoader(); 19 ~BHOLoader(); 20 21 // Callback invoked on receipt of an accessibility event. 22 void OnHookEvent(DWORD event, HWND window); 23 24 // Call this to install event hooks that will trigger on window creation 25 // and reparenting. Returns true if the hooks are successfully installed, 26 // false otherwise. 27 bool StartHook(); 28 29 // Call this to remove the event hooks that are installed by StartHook(). 30 void StopHook(); 31 32 // Retrieve the BHOLoader instance. Note that this is NOT thread-safe. 33 static BHOLoader* GetInstance(); 34 35 private: 36 EventHooker* hooker_; 37 }; 38 39 #endif // CHROME_FRAME_BHO_LOADER_H_ 40
