352 lines
10 KiB
C++
352 lines
10 KiB
C++
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/*++
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Copyright (C) 1997-2001 Microsoft Corporation
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Module Name:
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dataobj.cpp
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Abstract:
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header file defines CDataObject class
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Author:
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William Hsieh (williamh) created
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Revision History:
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--*/
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#include "devmgr.h"
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#include "DataObj.h"
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unsigned int CDataObject::m_cfNodeType = RegisterClipboardFormat(CCF_NODETYPE);
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unsigned int CDataObject::m_cfNodeTypeString = RegisterClipboardFormat(CCF_SZNODETYPE);
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unsigned int CDataObject::m_cfDisplayName = RegisterClipboardFormat(CCF_DISPLAY_NAME);
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unsigned int CDataObject::m_cfCoClass = RegisterClipboardFormat(CCF_SNAPIN_CLASSID);
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unsigned int CDataObject::m_cfSnapinInternal = RegisterClipboardFormat(SNAPIN_INTERNAL);
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unsigned int CDataObject::m_cfMachineName = RegisterClipboardFormat(MMC_SNAPIN_MACHINE_NAME);
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unsigned int CDataObject::m_cfClassGuid = RegisterClipboardFormat(DEVMGR_SNAPIN_CLASS_GUID);
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unsigned int CDataObject::m_cfDeviceID = RegisterClipboardFormat(DEVMGR_SNAPIN_DEVICE_ID);
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//
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// IUnknown interface implementation
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//
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ULONG
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CDataObject::AddRef()
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{
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::InterlockedIncrement((LONG*)&m_Ref);
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return m_Ref;
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}
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ULONG
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CDataObject::Release()
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{
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::InterlockedDecrement((LONG*)&m_Ref);
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if (!m_Ref) {
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delete this;
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return 0;
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}
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return m_Ref;
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}
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STDMETHODIMP
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CDataObject::QueryInterface(
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REFIID riid,
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void** ppv
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)
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{
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if (!ppv)
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return E_INVALIDARG;
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HRESULT hr = S_OK;
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if (IsEqualIID(riid, IID_IUnknown))
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*ppv = (IUnknown*)this;
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else if (IsEqualIID(riid, IID_IDataObject)) {
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*ppv = this;
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} else {
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hr = E_NOINTERFACE;
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}
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if (SUCCEEDED(hr))
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AddRef();
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else
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*ppv = NULL;
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return hr;
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}
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HRESULT
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CDataObject::Initialize(
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DATA_OBJECT_TYPES Type,
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COOKIE_TYPE ct,
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CCookie* pCookie,
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String& strMachineName
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)
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{
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try {
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m_strMachineName = strMachineName;
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m_pCookie = pCookie;
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m_Type = Type;
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m_ct = ct;
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} catch (CMemoryException* e) {
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e->Delete();
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return E_OUTOFMEMORY;
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}
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return S_OK;
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}
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STDMETHODIMP
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CDataObject::GetDataHere(
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LPFORMATETC lpFormatetc,
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LPSTGMEDIUM lpMedium
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)
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{
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HRESULT hr = S_OK;
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try {
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const CLIPFORMAT cf = lpFormatetc->cfFormat;
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hr = DV_E_FORMATETC;
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SafeInterfacePtr<IStream> StreamPtr;
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if (TYMED_HGLOBAL == lpMedium->tymed) {
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ULONG ulWritten;
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hr = CreateStreamOnHGlobal(lpMedium->hGlobal, FALSE, &StreamPtr);
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if (S_OK == hr) {
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const NODEINFO* pni = &NodeInfo[m_ct];
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ASSERT(pni->ct == m_ct);
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if (cf == m_cfNodeType) {
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const GUID* pGuid = &pni->Guid;
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hr = StreamPtr->Write(pGuid, sizeof(GUID), &ulWritten);
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} else if (cf == m_cfNodeTypeString) {
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const TCHAR *pszGuid = pni->GuidString;
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hr = StreamPtr->Write(pszGuid,
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(wcslen(pszGuid) + 1) * sizeof(TCHAR),
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&ulWritten
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);
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} else if (cf == m_cfDisplayName) {
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if (pni->idsFormat) {
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String strDisplayName;
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TCHAR Format[LINE_LEN];
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TCHAR LocalMachine[LINE_LEN];
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::LoadString(g_hInstance, pni->idsFormat, Format, sizeof(Format)/sizeof(TCHAR));
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LPCTSTR MachineName = m_strMachineName;
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if (m_strMachineName.IsEmpty()) {
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::LoadString(g_hInstance, IDS_LOCAL_MACHINE, LocalMachine,
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sizeof(LocalMachine) / sizeof(TCHAR));
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MachineName = LocalMachine;
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}
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strDisplayName.Format(Format, MachineName);
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hr = StreamPtr->Write(strDisplayName,
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(strDisplayName.GetLength() + 1) * sizeof(TCHAR),
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&ulWritten
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);
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}
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} else if (cf == m_cfSnapinInternal) {
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INTERNAL_DATA tID;
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tID.ct = m_ct;
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tID.dot = m_Type;
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tID.cookie = (MMC_COOKIE)m_pCookie;
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hr = StreamPtr->Write(&tID,
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sizeof(INTERNAL_DATA),
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&ulWritten
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);
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} else if (cf == m_cfCoClass) {
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hr = StreamPtr->Write(&CLSID_DEVMGR,
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sizeof(CLSID),
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&ulWritten
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);
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} else if (cf == m_cfMachineName) {
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if (!m_strMachineName.IsEmpty()) {
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hr = StreamPtr->Write((LPCTSTR)m_strMachineName,
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(m_strMachineName.GetLength()+1) * sizeof(TCHAR),
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NULL);
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} else {
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TCHAR Nothing[1];
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Nothing[0] = _T('\0');
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hr = StreamPtr->Write(Nothing, sizeof(Nothing), NULL);
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}
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} else if (cf == m_cfClassGuid) {
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if (COOKIE_TYPE_RESULTITEM_CLASS == m_pCookie->GetType()) {
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CClass* pClass = (CClass*)m_pCookie->GetResultItem();
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ASSERT(pClass);
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LPGUID pClassGuid = *pClass;
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hr = StreamPtr->Write(pClassGuid, sizeof(GUID), NULL);
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}
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} else if (cf == m_cfDeviceID) {
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if (COOKIE_TYPE_RESULTITEM_DEVICE == m_pCookie->GetType()) {
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CDevice* pDevice = (CDevice*)m_pCookie->GetResultItem();
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ASSERT(pDevice);
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LPCTSTR DeviceID = pDevice->GetDeviceID();
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hr = StreamPtr->Write(DeviceID,
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(wcslen(DeviceID) + 1) * sizeof(TCHAR),
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NULL
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);
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}
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} else {
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hr = DV_E_FORMATETC;
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}
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}
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}
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} catch (CMemoryException* e) {
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e->Delete();
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hr = E_OUTOFMEMORY;
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}
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return hr;
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}
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STDMETHODIMP
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CDataObject::GetData(
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LPFORMATETC lpFormatetc,
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LPSTGMEDIUM lpMedium
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)
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{
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return E_NOTIMPL;
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}
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STDMETHODIMP
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CDataObject::EnumFormatEtc(
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DWORD dwDirection,
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LPENUMFORMATETC* ppEnumFormatEtc
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)
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{
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return E_NOTIMPL;
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}
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HRESULT ExtractData(
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IDataObject* pIDataObject,
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unsigned int cfClipFormat,
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BYTE* pBuffer,
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DWORD cbBuffer
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)
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{
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if (NULL == pIDataObject || NULL == pBuffer)
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return E_POINTER;
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HRESULT hr = S_OK;
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FORMATETC FormatEtc = {(CLIPFORMAT)cfClipFormat, NULL, DVASPECT_CONTENT, -1 , TYMED_HGLOBAL};
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STGMEDIUM StgMedium = {TYMED_HGLOBAL, NULL};
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StgMedium.hGlobal = ::GlobalAlloc(GMEM_SHARE, cbBuffer);
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if (NULL == StgMedium.hGlobal) {
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ASSERT(FALSE);
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hr = E_OUTOFMEMORY;
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} else {
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hr = pIDataObject->GetDataHere(&FormatEtc, &StgMedium);
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if (SUCCEEDED(hr)) {
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BYTE* pData = reinterpret_cast<BYTE*>(::GlobalLock(StgMedium.hGlobal));
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if (NULL == pData) {
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ASSERT(FALSE);
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hr = E_UNEXPECTED;
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} else {
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::memcpy(pBuffer, pData, cbBuffer);
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::GlobalUnlock(StgMedium.hGlobal);
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}
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}
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::GlobalFree(StgMedium.hGlobal);
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}
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return hr;
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}
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#if 0
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/////////////////////////////////////////////////////////////////////
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////
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/// Helper functions to extact data from the given IDataObject
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///
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HRESULT ExtractData(IDataObject* piDataObject,
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unsigned int cfClipFormat,
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BYTE* pBuffer,
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DWORD cbBuffer
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);
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HRESULT ExtractString(IDataObject* piDataObject,
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unsigned int cfClipFormat,
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String* pstr,
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DWORD cchMax
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);
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HRESULT
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ExtractData(
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IDataObject* piDataObject,
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unsigned int cfClipFormat,
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BYTE* pBuffer,
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DWORD cbBuffer
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)
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{
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HRESULT hr = S_OK;
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FORMATETC Formatetc = {cfClipFormat, NULL, DVASPET_CONTENT, -1, TYMED_HGLOBAL};
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STGMEDIUM Stgmedium = {TYMED_HGLOBAL, NULL};
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Stgmedium.hGlobal = ::GlobalAlloc(GMEM_SHARE, cbBuffer);
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if (NULL == Stgmedium.hGlobal) {
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ASSERT(FASLE);
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AfxThrowMemoryException();
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hr = E_OUTOFMEMORY;
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return hr;
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}
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hr = piDataObject->GetDataHere(&Formatetc, &Stgmedium);
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if (FAILED(hr)) {
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ASSERT(FALSE);
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return hr;
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}
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BYTE* pData = reinterpret_cast<BYTE*>(::GlobalLock(Stgmedium.hGlobal));
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if (NULL == pData) {
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ASSERT(FALSE);
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hr = E_UNEXPECTED;
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}
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::memcpy(pBuffer, pData, cbBuffer);
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return hr;
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}
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HRESULT
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ExtractString(
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IDataObject* piDataObject,
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unsigned int cfClipFormat,
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String* pstr
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DWORD cbMax
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)
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{
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FORMATETC Formatetc = {cfClipFormat, NULL, DVASPET_CONTENT, -1, TYMED_HGLOBAL};
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STGMEDIUM Stgmedium = {TYMED_HGLOBAL, NULL};
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Stgmedium.hGlobal = ::GlobalAlloc(GMEM_SHARE, cbBuffer);
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if (NULL == Stgmedium.hGlobal) {
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ASSERT(FASLE);
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AfxThrowMemoryException();
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hr = E_OUTOFMEMORY;
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return hr;
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}
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HRESULT hr = piDataObject->GetDataHere(&Formatetc, &Stgmedium);
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if (FAILED(hr)) {
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ASSERT(FALSE);
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return hr;
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}
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LPTSTR pszData = reinterpret_cast<LPTSTR>(::GlobalLock(Stgmedium.hGlobal));
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if (NULL == pszData) {
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ASSERT(FALSE);
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return E_UNEXPECTTED;
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}
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USES_CONVERSION;
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*pstr = OLE2T(pszData);
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return S_OK;
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}
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#endif
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