| // Copyright (c) 2010 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. |
| |
| #include "chrome_frame/event_hooker.h" |
| |
| #include <crtdbg.h> |
| #include "chrome_frame/bho_loader.h" |
| |
| EXTERN_C IMAGE_DOS_HEADER __ImageBase; |
| |
| EventHooker::EventHooker() |
| : window_creation_hook_(NULL) {} |
| |
| EventHooker::~EventHooker() { |
| StopHook(); |
| } |
| |
| bool EventHooker::StartHook() { |
| if ((NULL != window_creation_hook_)) { |
| return false; |
| } |
| |
| window_creation_hook_ = SetWinEventHook(EVENT_OBJECT_CREATE, |
| EVENT_OBJECT_CREATE, |
| reinterpret_cast<HMODULE>( |
| &__ImageBase), |
| WindowCreationHookProc, |
| 0, |
| 0, |
| WINEVENT_INCONTEXT); |
| if (NULL == window_creation_hook_) { |
| return false; |
| } |
| return true; |
| } |
| |
| void EventHooker::StopHook() { |
| if (NULL != window_creation_hook_) { |
| UnhookWinEvent(window_creation_hook_); |
| window_creation_hook_ = NULL; |
| } |
| } |
| |
| VOID CALLBACK EventHooker::WindowCreationHookProc(HWINEVENTHOOK hook, |
| DWORD event, |
| HWND window, |
| LONG object_id, |
| LONG child_id, |
| DWORD event_tid, |
| DWORD event_time) { |
| _ASSERTE((EVENT_OBJECT_CREATE == event) || |
| (EVENT_OBJECT_PARENTCHANGE == event)); |
| if (OBJID_WINDOW == object_id) { |
| BHOLoader::GetInstance()->OnHookEvent(event, window); |
| } |
| } |
| |