WebBroswer2 事件处理

这两天写一个辅助工具，用到了WebBrowser2控件，需要对DIID_DWebBrowserEvents2事件、DIID_HTMLDocumentEvents2进行处理

ATL提供了IDispEventSimpleImpl模板来简化事件处理，但是这个模板只能绑定一个事件，google了半天也没有找到好的解决方案，索性参考IDispEventSimpleImpl DIY了一个EasyDispEventImpl模板代码如下：

1. struct EVENT_DIID_ENTRY
2. {
3. const IID* piid;
4. };
5. #define BEGIN_EVENT_IID_MAP(_class)/
6. typedef _class _GetEventIIDMapFinder;/
7. static const EVENT_DIID_ENTRY * _GetEventIIDMap()/
8. {/
9. typedef _class _atl_event_classtype;/
10. static const EVENT_DIID_ENTRY __map[] = {
11. #define EVENT_IID_ENTRY(iid) {&iid},
12. #define END_EVENT_IID_MAP() /
13. {NULL} }; return __map;/
14. }
15. class CWebBrowser2EventsBase
16. {
17. protected:
18. static _ATL_FUNC_INFO StatusTextChangeStruct;
19. static _ATL_FUNC_INFO TitleChangeStruct;
20. static _ATL_FUNC_INFO PropertyChangeStruct;
21. static _ATL_FUNC_INFO OnQuitStruct;
22. static _ATL_FUNC_INFO OnToolBarStruct;
23. static _ATL_FUNC_INFO OnMenuBarStruct;
24. static _ATL_FUNC_INFO OnStatusBarStruct;
25. static _ATL_FUNC_INFO OnFullScreenStruct;
26. static _ATL_FUNC_INFO OnTheaterModeStruct;
27. static _ATL_FUNC_INFO DownloadBeginStruct;
28. static _ATL_FUNC_INFO DownloadCompleteStruct;
29. static _ATL_FUNC_INFO NewWindow2Struct;
30. static _ATL_FUNC_INFO CommandStateChangeStruct;
31. static _ATL_FUNC_INFO BeforeNavigate2Struct;
32. static _ATL_FUNC_INFO ProgressChangeStruct;
33. static _ATL_FUNC_INFO NavigateComplete2Struct;
34. static _ATL_FUNC_INFO DocumentComplete2Struct;
35. static _ATL_FUNC_INFO OnVisibleStruct;
36. static _ATL_FUNC_INFO SetSecureLockIconStruct;
37. static _ATL_FUNC_INFO NavigateErrorStruct;
38. static _ATL_FUNC_INFO PrivacyImpactedStateChangeStruct;
39. //static _ATL_FUNC_INFO FileDownloadStruct; // Unsafe to use
40. //static _ATL_FUNC_INFO WindowClosingStruct;
41. static _ATL_FUNC_INFO KeyUpEventStruct;
42. static _ATL_FUNC_INFO MouseOverEventStruct;
43. static _ATL_FUNC_INFO ClickEventStruct;
44. static _ATL_FUNC_INFO DbClickEventStruct;
45. static _ATL_FUNC_INFO MouseOutEventStruct;
46. };
47. template <UINT nID, class T>
48. class ATL_NO_VTABLE EasyDispEventImpl
49. {
50. DWORD m_dwBrowserEventCookie;
51. DWORD m_dwDocumentEventCookie;
52. public:
53. EasyDispEventImpl():m_dwBrowserEventCookie(0xFEFEFEFE),m_dwDocumentEventCookie(0xFEFEFEFE)
54. {}
55. STDMETHOD(_LocDEQueryInterface)(REFIID riid, void ** ppvObject)
56. {
57. ATLASSERT(ppvObject != NULL);
58. if (ppvObject == NULL)
59. return E_POINTER;
60. *ppvObject = NULL;
61. if (InlineIsEqualGUID(riid, IID_NULL))
62. return E_NOINTERFACE;
63. const EVENT_DIID_ENTRY * pMap = T::_GetEventIIDMap();
64. const EVENT_DIID_ENTRY * pFound = NULL;
65. while (pMap->piid != NULL)
66. {
67. if(InlineIsEqualGUID(riid,*pMap->piid))
68. {
69. pFound = pMap;
70. break;
71. }
72. pMap++;
73. }
74. if (pFound || InlineIsEqualUnknown(riid) || InlineIsEqualGUID(riid, __uuidof(IDispatch)))
75. {
76. *ppvObject = this;
77. AddRef();
78. #ifdef _ATL_DEBUG_INTERFACES
79. _AtlDebugInterfacesModule.AddThunk((IUnknown**)ppvObject, _T("IDispEventImpl"), riid);
80. #endif // _ATL_DEBUG_INTERFACES
81. return S_OK;
82. }
83. else
84. return E_NOINTERFACE;
85. }
86. // These are here only to support use in non-COM objects
87. virtual ULONG STDMETHODCALLTYPE AddRef()
88. {
89. return 1;
90. }
91. virtual ULONG STDMETHODCALLTYPE Release()
92. {
93. return 1;
94. }
95. STDMETHOD(GetTypeInfoCount)(UINT* )
96. {ATLTRACENOTIMPL(_T("IDispEventSimpleImpl::GetTypeInfoCount"));}
97. STDMETHOD(GetTypeInfo)(UINT , LCID , ITypeInfo** )
98. {ATLTRACENOTIMPL(_T("IDispEventSimpleImpl::GetTypeInfo"));}
99. STDMETHOD(GetIDsOfNames)(REFIID , LPOLESTR* , UINT ,
100. LCID , DISPID* )
101. {ATLTRACENOTIMPL(_T("IDispEventSimpleImpl::GetIDsOfNames"));}
102. STDMETHOD(Invoke)(DISPID dispidMember, REFIID ,
103. LCID lcid, WORD , DISPPARAMS* pdispparams, VARIANT* pvarResult,
104. EXCEPINFO* , UINT* )
105. {
106. const _ATL_EVENT_ENTRY<T>* pMap = T::_GetSinkMap();
107. const _ATL_EVENT_ENTRY<T>* pFound = NULL;
108. while (pMap->piid != NULL)
109. {
110. const EVENT_DIID_ENTRY * pEvts = T::_GetEventIIDMap();
111. const EVENT_DIID_ENTRY * pFoundEvt = NULL;
112. while (pEvts->piid != NULL)
113. {
114. if(InlineIsEqualGUID(*(pMap->piid),*(pEvts->piid)))
115. {
116. pFoundEvt = pEvts;
117. break;
118. }
119. pEvts++;
120. }
121. if ((pMap->nControlID == nID) && (pMap->dispid == dispidMember) && pFoundEvt )
122. {
123. pFound = pMap;
124. break;
125. }
126. pMap++;
127. }
128. if (pFound == NULL)
129. return S_OK;
130. _ATL_FUNC_INFO info;
131. _ATL_FUNC_INFO* pInfo;
132. if (pFound->pInfo != NULL)
133. pInfo = pFound->pInfo;
134. else
135. {
136. pInfo = &info;
137. HRESULT hr = GetFuncInfoFromId(*(pFound->piid), dispidMember, lcid, info);
138. if (FAILED(hr))
139. return S_OK;
140. }
141. return InvokeFromFuncInfo(pFound->pfn, *pInfo, pdispparams, pvarResult);
142. }
143. //Helper for invoking the event
144. HRESULT InvokeFromFuncInfo(void (__stdcall T::*pEvent)(), _ATL_FUNC_INFO& info, DISPPARAMS* pdispparams, VARIANT* pvarResult)
145. {
146. ATLASSERT(pdispparams->cArgs == (UINT)info.nParams);
147. T* pT = static_cast<T*>(this);
148. // If this assert occurs, then add
149. // #define _ATL_MAX_VARTYPES nnnn
150. // before including atlcom.h
151. ATLASSERT(info.nParams <= _ATL_MAX_VARTYPES);
152. if (info.nParams > _ATL_MAX_VARTYPES)
153. {
154. return E_FAIL;
155. }
156. VARIANTARG* rgVarArgs[_ATL_MAX_VARTYPES];
157. VARIANTARG** pVarArgs = info.nParams ? rgVarArgs : 0;
158. UINT nIndex = 0;
159. #ifndef _ATL_IGNORE_NAMED_ARGS
160. for (nIndex; nIndex < pdispparams->cNamedArgs; nIndex++)
161. pVarArgs[pdispparams->rgdispidNamedArgs[nIndex]] = &pdispparams->rgvarg[nIndex];
162. #endif
163. for (; nIndex < pdispparams->cArgs; nIndex++)
164. pVarArgs[info.nParams-nIndex-1] = &pdispparams->rgvarg[nIndex];
165. CComStdCallThunk<T> thunk;
166. thunk.Init(pEvent, pT);
167. CComVariant tmpResult;
168. if (pvarResult == NULL)
169. pvarResult = &tmpResult;
170. HRESULT hr = DispCallFunc(
171. &thunk,
172. 0,
173. info.cc,
174. info.vtReturn,
175. info.nParams,
176. info.pVarTypes,
177. pVarArgs,
178. pvarResult);
179. ATLASSERT(SUCCEEDED(hr));
180. return hr;
181. }
182. //Helper for finding the function index for a DISPID
183. virtual HRESULT GetFuncInfoFromId(const IID& , DISPID , LCID , _ATL_FUNC_INFO& )
184. {
185. ATLTRACE(_T("TODO: Classes using IDispEventSimpleImpl should override this method/n"));
186. ATLASSERT(0);
187. ATLTRACENOTIMPL(_T("IDispEventSimpleImpl::GetFuncInfoFromId"));
188. }
189. //Helpers for sinking events on random IUnknown*
190. HRESULT DispBrowserEventAdvise(IUnknown* pUnk)
191. {
192. ATLENSURE(m_dwBrowserEventCookie == 0xFEFEFEFE);
193. return AtlAdvise(pUnk, (IUnknown*)this,DIID_DWebBrowserEvents2, &m_dwBrowserEventCookie);
194. }
195. HRESULT DispBrowserEventUnadvise(IUnknown* pUnk)
196. {
197. HRESULT hr = AtlUnadvise(pUnk,DIID_DWebBrowserEvents2, m_dwBrowserEventCookie);
198. m_dwBrowserEventCookie = 0xFEFEFEFE;
199. return hr;
200. }
201. HRESULT DispDocumentEventAdvise(IUnknown* pUnk)
202. {
203. ATLENSURE(m_dwDocumentEventCookie == 0xFEFEFEFE);
204. return AtlAdvise(pUnk, (IUnknown*)this, DIID_HTMLDocumentEvents2, &m_dwDocumentEventCookie);
205. }
206. HRESULT DispDocumentEventUnadvise(IUnknown* pUnk)
207. {
208. HRESULT hr = AtlUnadvise(pUnk,DIID_HTMLDocumentEvents2, m_dwDocumentEventCookie);
209. m_dwDocumentEventCookie = 0xFEFEFEFE;
210. return hr;
211. }
212. HRESULT DispElementEventAdvise(IUnknown* pUnk, const IID* piid,DWORD * dwCookie)
213. {
214. ///ATLASSERT(*dwCookie == 0xFEFEFEFE);
215. return AtlAdvise(pUnk, (IUnknown*)this, *piid,dwCookie);
216. }
217. HRESULT DispElementEventUnadvise(IUnknown* pUnk, const IID* piid,DWORD * dwCookie)
218. {
219. HRESULT hr = AtlUnadvise(pUnk, *piid,*dwCookie);
220. *dwCookie = 0xFEFEFEFE;
221. return hr;
222. }
223. };
224. #define EASY_SINK_ENTRY(id,iid, dispid,fn,info) {id, &iid,0, dispid, (void (__stdcall _atl_event_classtype::*)())fn, info},
EASY_SINK_ENTRY 是SINK_ENTRY_INFO的替代物，因为我们自定了_ATL_EVENT_ENTRY结构的pInfo成员，因此nOffset可以为了0了。使用方法：

_ATL_FUNC_INFO DocumentComplete2Struct={CC_STDCALL, VT_EMPTY, 2, {VT_DISPATCH, VT_BYREF|VT_VARIANT}};
//....
_ATL_FUNC_INFO ClickEventStruct = {CC_STDCALL, VT_EMPTY, 1, {VT_DISPATCH}};
class CMyClass : public EasyDispEventImpl<1, CMyClass >
{
public:
BEGIN_SINK_MAP(CMyClass)
EASY_SINK_ENTRY(1, DIID_DWebBrowserEvents2, DISPID_DOCUMENTCOMPLETE, __DocumentComplete, &DocumentComplete2Struct)
EASY_SINK_ENTRY(1, DIID_HTMLDocumentEvents2, DISPID_HTMLELEMENTEVENTS2_ONCLICK, __Click, &ClickEventStruct)
END_SINK_MAP()
void __stdcall __DocumentComplete(IDispatch* pDisp, VARIANT* pvURL)
{
//TODO...
}
void __stdcall __Click(IDispatch* pDisp)
{
T* pT = static_cast<T*>(this);
CComQIPtr<IHTMLEventObj2> evt(pDisp);
//TODO ....
}
};

WebBroswer2 事件处理

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