在JavaScript 调用C++
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方案一：
// html & JavaScript
...
<button value="Click me" onclick="window.navigate('app:command&arg1=1&arg2=2')" />
...
// C++: 响应 的消息函数OnBeforeNavigat2
virtual void OnBeforeNavigate2( LPCTSTR lpszURL, DWORD nFlags, LPCTSTR lpszTargetFrameName,
CByteArray& baPostedData, LPCTSTR lpszHeaders, BOOL* pbCancel );
// C++ code goes here
CXXXDlg::OnBeforeNavigate2( LPCTSTR lpszURL, DWORD nFlags, LPCTSTR lpszTargetFrameName, CByteArray& baPostedData, LPCTSTR lpszHeaders, BOOL* pbCancel ){ CString strUrl = lpszURL; if(strUrl.Left(4) == _T("app:")) { // cancel the common url navigate and call your c++ code here *pbCancel = TURE; // call other c++ function here or parse the argument in the strUrl } // go common url navigate here }方案二：// html & javaScript
...
function CallCpp()
{
alert('start to call cpp here');
window.external.JavaScriptCallCpp('This is a test for call C++ in JavaScript');
}
<button onclick="CallCpp()" > JavaScript访问C++代码</button>
...
// C++ code goes here
CString javaScriptName = _T("JavaScriptCallCpp");
#define DISPID_CallCppFromJs 1
// 实现IDispatch 接口
// .hclass CImpIDispatch : public IDispatch{ protected: ULONG m_cRef; public: CImpIDispatch(void); ~CImpIDispatch(void); STDMETHODIMP QueryInterface(REFIID, void **); STDMETHODIMP_(ULONG) AddRef(void); STDMETHODIMP_(ULONG) Release(void); //IDispatch STDMETHODIMP GetTypeInfoCount(UINT* pctinfo); STDMETHODIMP GetTypeInfo(/* [in] */ UINT iTInfo, /* [in] */ LCID lcid, /* [out] */ ITypeInfo** ppTInfo); STDMETHODIMP GetIDsOfNames( /* [in] */ REFIID riid, /* [size_is][in] */ LPOLESTR *rgszNames, /* [in] */ UINT cNames, /* [in] */ LCID lcid, /* [size_is][out] */ DISPID *rgDispId); STDMETHODIMP Invoke( /* [in] */ DISPID dispIdMember, /* [in] */ REFIID riid, /* [in] */ LCID lcid, /* [in] */ WORD wFlags, /* [out][in] */ DISPPARAMS *pDispParams, /* [out] */ VARIANT *pVarResult, /* [out] */ EXCEPINFO *pExcepInfo, /* [out] */ UINT *puArgErr);};// .cppSTDMETHODIMP CImpIDispatch::QueryInterface( REFIID riid, void **ppv ){ *ppv = NULL; if ( IID_IDispatch == riid ) { *ppv = this; } if ( NULL != *ppv ) { ((LPUNKNOWN)*ppv)->AddRef(); return NOERROR; } return E_NOINTERFACE;}STDMETHODIMP_(ULONG) CImpIDispatch::AddRef(void){ return ++m_cRef;}STDMETHODIMP_(ULONG) CImpIDispatch::Release(void){ return --m_cRef;}//IDispatchSTDMETHODIMP CImpIDispatch::GetTypeInfoCount(UINT* /*pctinfo*/){ return E_NOTIMPL;}STDMETHODIMP CImpIDispatch::GetTypeInfo( /* [in] */ UINT /*iTInfo*/, /* [in] */ LCID /*lcid*/, /* [out] */ ITypeInfo** /*ppTInfo*/){ return E_NOTIMPL;}STDMETHODIMP CImpIDispatch::GetIDsOfNames( /* [in] */ REFIID riid, /* [size_is][in] */ OLECHAR** rgszNames, /* [in] */ UINT cNames, /* [in] */ LCID lcid, /* [size_is][out] */ DISPID* rgDispId){ HRESULT hr; UINT i; // Assume some degree of success hr = NOERROR; for ( i=0; i < cNames; i++) { CString cszName = rgszNames[i]; if (cszName == javaScriptName) { rgDispId[i] = DISPID_CallCppFromJs; } else { // One or more are unknown so set the return code accordingly hr = ResultFromScode(DISP_E_UNKNOWNNAME); rgDispId[i] = DISPID_UNKNOWN; } } return hr;}STDMETHODIMP CImpIDispatch::Invoke( /* [in] */ DISPID dispIdMember, /* [in] */ REFIID /*riid*/, /* [in] */ LCID /*lcid*/, /* [in] */ WORD wFlags, /* [out][in] */ DISPPARAMS* pDispParams, /* [out] */ VARIANT* pVarResult, /* [out] */ EXCEPINFO* /*pExcepInfo*/, /* [out] */ UINT* puArgErr){ CXXXDlg* pDlg = (CCppCallJsDlg*) AfxGetMainWnd(); if (dispIdMember == DISPID_CallCppFromJs) { if (wFlags & DISPATCH_PROPERTYGET) { if (pVarResult != NULL) { VariantInit(pVarResult); V_VT(pVarResult)=VT_BOOL; V_BOOL(pVarResult)=true; } } if (wFlags & DISPATCH_METHOD) { CString cszArg1= pDispParams->rgvarg[0].bstrVal; pDlg->CallByScript(cszArg1); } } return S_OK;}// 改写COleControlSit
// .hclass CCustomControlSite:public COleControlSite{public: CCustomControlSite(COleControlContainer *pCnt):COleControlSite(pCnt){} BEGIN_INTERFACE_PART(DocHostShowUI, IDocHostShowUI) INIT_INTERFACE_PART(CDocHostSite, DocHostShowUI) STDMETHOD(ShowHelp)( /* [in ] */ HWND hwnd, /* [in ] */ LPOLESTR pszHelpFile, /* [in ] */ UINT uCommand, /* [in ] */ DWORD dwData, /* [in ] */ POINT ptMouse, /* [out] */ IDispatch __RPC_FAR *pDispatchObjectHit); STDMETHOD(ShowMessage)( /* [in ] */ HWND hwnd, /* [in ] */ LPOLESTR lpstrText, /* [in ] */ LPOLESTR lpstrCaption, /* [in ] */ DWORD dwType, /* [in ] */ LPOLESTR lpstrHelpFile, /* [in ] */ DWORD dwHelpContext, /* [out] */ LRESULT __RPC_FAR *plResult); END_INTERFACE_PART(DocHostShowUI)protected: DECLARE_INTERFACE_MAP();BEGIN_INTERFACE_PART(DocHostUIHandler, IDocHostUIHandler) STDMETHOD(ShowContextMenu)(/* [in] */ DWORD dwID, /* [in] */ POINT __RPC_FAR *ppt, /* [in] */ IUnknown __RPC_FAR *pcmdtReserved, /* [in] */ IDispatch __RPC_FAR *pdispReserved); STDMETHOD(GetHostInfo)( /* [out][in] */ DOCHOSTUIINFO __RPC_FAR *pInfo); STDMETHOD(ShowUI)( /* [in] */ DWORD dwID, /* [in] */ IOleInPlaceActiveObject __RPC_FAR *pActiveObject, /* [in] */ IOleCommandTarget __RPC_FAR *pCommandTarget, /* [in] */ IOleInPlaceFrame __RPC_FAR *pFrame, /* [in] */ IOleInPlaceUIWindow __RPC_FAR *pDoc); STDMETHOD(HideUI)(void); STDMETHOD(UpdateUI)(void); STDMETHOD(EnableModeless)(/* [in] */ BOOL fEnable); STDMETHOD(OnDocWindowActivate)(/* [in] */ BOOL fEnable); STDMETHOD(OnFrameWindowActivate)(/* [in] */ BOOL fEnable); STDMETHOD(ResizeBorder)( /* [in] */ LPCRECT prcBorder, /* [in] */ IOleInPlaceUIWindow __RPC_FAR *pUIWindow, /* [in] */ BOOL fRameWindow); STDMETHOD(TranslateAccelerator)( /* [in] */ LPMSG lpMsg, /* [in] */ const GUID __RPC_FAR *pguidCmdGroup, /* [in] */ DWORD nCmdID); STDMETHOD(GetOptionKeyPath)( /* [out] */ LPOLESTR __RPC_FAR *pchKey, /* [in] */ DWORD dw); STDMETHOD(GetDropTarget)( /* [in] */ IDropTarget __RPC_FAR *pDropTarget, /* [out] */ IDropTarget __RPC_FAR *__RPC_FAR *ppDropTarget); STDMETHOD(GetExternal)( /* [out] */ IDispatch __RPC_FAR *__RPC_FAR *ppDispatch); STDMETHOD(TranslateUrl)( /* [in] */ DWORD dwTranslate, /* [in] */ OLECHAR __RPC_FAR *pchURLIn, /* [out] */ OLECHAR __RPC_FAR *__RPC_FAR *ppchURLOut); STDMETHOD(FilterDataObject)( /* [in] */ IDataObject __RPC_FAR *pDO, /* [out] */ IDataObject __RPC_FAR *__RPC_FAR *ppDORet);END_INTERFACE_PART(DocHostUIHandler)};class CCustomOccManager :public COccManager{public: CCustomOccManager(){} COleControlSite* CreateSite(COleControlContainer* pCtrlCont) { CCustomControlSite *pSite = new CCustomControlSite(pCtrlCont); return pSite; }};// .cppBEGIN_INTERFACE_MAP(CCustomControlSite, COleControlSite) INTERFACE_PART(CCustomControlSite, IID_IDocHostShowUI, DocHostShowUI) INTERFACE_PART(CCustomControlSite, IID_IDocHostUIHandler, DocHostUIHandler)END_INTERFACE_MAP()ULONG CCustomControlSite::XDocHostShowUI::AddRef(){ METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI); return pThis->ExternalAddRef();}ULONG CCustomControlSite::XDocHostShowUI::Release(){ METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI); return pThis->ExternalRelease();}HRESULT CCustomControlSite::XDocHostShowUI::QueryInterface(REFIID riid, void ** ppvObj){ METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI); return pThis->ExternalQueryInterface( &riid, ppvObj );}HRESULT CCustomControlSite::XDocHostShowUI::ShowHelp(HWND hwnd, LPOLESTR pszHelpFile, UINT nCommand, DWORD dwData, POINT ptMouse, IDispatch * pDispatchObjectHit){ METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI); return S_OK;}HRESULT CCustomControlSite::XDocHostShowUI::ShowMessage(HWND hwnd, LPOLESTR lpstrText, LPOLESTR lpstrCaption, DWORD dwType, LPOLESTR lpstrHelpFile, DWORD dwHelpContext, LRESULT * plResult){ METHOD_PROLOGUE(CCustomControlSite, DocHostShowUI); MessageBox(hwnd, (CString)lpstrText, _T("Cpp & JavaScript"), /*dwType*/MB_ICONWARNING); return S_OK;}ULONG FAR EXPORT CCustomControlSite::XDocHostUIHandler::AddRef(){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return pThis->ExternalAddRef();}ULONG FAR EXPORT CCustomControlSite::XDocHostUIHandler::Release(){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return pThis->ExternalRelease();}HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::QueryInterface(REFIID riid, void **ppvObj){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) HRESULT hr = (HRESULT)pThis->ExternalQueryInterface(&riid, ppvObj); return hr;}// * CImpIDocHostUIHandler::GetHostInfo// *// * Purpose: Called at initialization// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::GetHostInfo( DOCHOSTUIINFO* pInfo ){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER; pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT; return S_OK;}// * CImpIDocHostUIHandler::ShowUI// *// * Purpose: Called when MSHTML.DLL shows its UI// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::ShowUI( DWORD dwID, IOleInPlaceActiveObject * /*pActiveObject*/, IOleCommandTarget * pCommandTarget, IOleInPlaceFrame * /*pFrame*/, IOleInPlaceUIWindow * /*pDoc*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) // We've already got our own UI in place so just return S_OK return S_OK;}// * CImpIDocHostUIHandler::HideUI// *// * Purpose: Called when MSHTML.DLL hides its UI// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::HideUI(void){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return S_OK;}// * CImpIDocHostUIHandler::UpdateUI// *// * Purpose: Called when MSHTML.DLL updates its UI// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::UpdateUI(void){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) // MFC is pretty good about updating it's UI in it's Idle loop so I don't do anything here return S_OK;}// * CImpIDocHostUIHandler::EnableModeless// *// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::EnableModeless// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::EnableModeless(BOOL /*fEnable*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}// * CImpIDocHostUIHandler::OnDocWindowActivate// *// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::OnDocWindowActivate// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::OnDocWindowActivate(BOOL /*fActivate*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}// * CImpIDocHostUIHandler::OnFrameWindowActivate// *// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::OnFrameWindowActivate// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::OnFrameWindowActivate(BOOL /*fActivate*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}// * CImpIDocHostUIHandler::ResizeBorder// *// * Purpose: Called from MSHTML.DLL's IOleInPlaceActiveObject::ResizeBorder// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::ResizeBorder( LPCRECT /*prcBorder*/, IOleInPlaceUIWindow* /*pUIWindow*/, BOOL /*fRameWindow*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}// * CImpIDocHostUIHandler::ShowContextMenu// *// * Purpose: Called when MSHTML.DLL would normally display its context menu// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::ShowContextMenu( DWORD /*dwID*/, POINT* pptPosition, IUnknown* /*pCommandTarget*/, IDispatch* /*pDispatchObjectHit*/){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL; //CMenu menu; //menu.LoadMenu(IDR_CUSTOM_POPUP); //CMenu* pSubMenu = menu.GetSubMenu(0); ////Because we passed in theApp.m_pMainWnd all of our ////WM_COMMAND handlers for the menu items must be handled ////in CCustomBrowserApp. If you want this to be your dialog ////you will have to grab a pointer to your dialog class and ////pass the hWnd of it into the last parameter in this call //pSubMenu->TrackPopupMenu(TPM_LEFTALIGN|TPM_RIGHTBUTTON, pptPosition->x, pptPosition->y, theApp.m_pMainWnd); return S_OK; // We've shown our own context menu. MSHTML.DLL will no longer try to show its own.}// * CImpIDocHostUIHandler::TranslateAccelerator// *// * Purpose: Called from MSHTML.DLL's TranslateAccelerator routines// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::TranslateAccelerator(LPMSG lpMsg, /* [in] */ const GUID __RPC_FAR *pguidCmdGroup, /* [in] */ DWORD nCmdID){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) //disable F5 if(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(VK_F5) < 0) return S_OK; if(GetKeyState(VK_CONTROL) & 0x8000) { //disable ctrl + O if(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x4F) < 0) return S_OK; //disable ctrl + p if(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x50) < 0) return S_OK; //disable ctrl + N if(lpMsg->message == WM_KEYDOWN && GetAsyncKeyState(0x4E) < 0) return S_OK; } //disable back space if(lpMsg->wParam == VK_BACK) return S_OK; return S_FALSE;}// * CImpIDocHostUIHandler::GetOptionKeyPath// *// * Purpose: Called by MSHTML.DLL to find where the host wishes to store // * its options in the registry// *HRESULT FAR EXPORT CCustomControlSite::XDocHostUIHandler::GetOptionKeyPath(BSTR* pbstrKey, DWORD){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::GetDropTarget( /* [in] */ IDropTarget __RPC_FAR *pDropTarget, /* [out] */ IDropTarget __RPC_FAR *__RPC_FAR *ppDropTarget){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}STDMETHODIMP CCustomControlSite::XDocHostUIHandler::GetExternal( /* [out] */ IDispatch __RPC_FAR *__RPC_FAR *ppDispatch){ // return the IDispatch we have for extending the object Model IDispatch* pDisp = (IDispatch*)theApp.m_pDispOM; pDisp->AddRef(); *ppDispatch = pDisp; return S_OK;} STDMETHODIMP CCustomControlSite::XDocHostUIHandler::TranslateUrl( /* [in] */ DWORD dwTranslate, /* [in] */ OLECHAR __RPC_FAR *pchURLIn, /* [out] */ OLECHAR __RPC_FAR *__RPC_FAR *ppchURLOut){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;} STDMETHODIMP CCustomControlSite::XDocHostUIHandler::FilterDataObject( /* [in] */ IDataObject __RPC_FAR *pDO, /* [out] */ IDataObject __RPC_FAR *__RPC_FAR *ppDORet){ METHOD_PROLOGUE(CCustomControlSite, DocHostUIHandler) return E_NOTIMPL;}// 修改App
// .hclass CImpIDispatch;class CXXXApp : public CWinApp{ CImpIDispatch *m_pDispOM; }// .cppBOOL CXXXApp::InitInstance(){ CWinApp::InitInstance(); CCustomOccManager *pMgr = new CCustomOccManager; // Create an IDispatch class for extending the Dynamic HTML Object Model m_pDispOM = new CImpIDispatch; // Set our control containment up but using our control container // management class instead of MFC's default AfxEnableControlContainer(pMgr); }
转自：
http://blog.csdn.net/sky04/article/details/5538535
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