SCODE AFXAPI _AfxOleDoConvert(LPSTORAGE lpStg, REFCLSID rClsidNew)
{
SCODE sc;
CLSID clsidOld;
if ((sc = ReadClassStg(lpStg, &clsidOld)) != S_OK)
{
clsidOld = CLSID_NULL;
return sc;
}
// read old fmt/old user type; sets out params to NULL on error
CLIPFORMAT cfOld;
LPOLESTR lpszOld = NULL;
sc = ReadFmtUserTypeStg(lpStg, &cfOld, &lpszOld);
ASSERT(sc == S_OK || (cfOld == 0 && lpszOld == NULL));
// get new user type name; if error, set to NULL string
OLECHAR chZero = 0;
LPOLESTR lpszNew = NULL;
if (OleRegGetUserType(rClsidNew, USERCLASSTYPE_FULL, &lpszNew) != S_OK)
lpszNew = &chZero;
// write class stg
if ((sc = WriteClassStg(lpStg, rClsidNew)) != S_OK)
goto ErrorReturn;
// write old fmt/new user type;
if ((sc = WriteFmtUserTypeStg(lpStg, cfOld, lpszNew)) != S_OK)
goto RewriteInfo;
// set convert bit
if ((sc = SetConvertStg(lpStg, TRUE)) != S_OK)
goto RewriteInfo;
goto ErrorReturn;
RewriteInfo:
WriteClassStg(lpStg, clsidOld);
WriteFmtUserTypeStg(lpStg, cfOld, lpszOld);
ErrorReturn:
if (lpszNew != &chZero)
CoTaskMemFree(lpszNew);
CoTaskMemFree(lpszOld);
return sc;
}
FARINTERNAL Ut10NativeStmToContentsStm
(LPSTORAGE pstg, REFCLSID rclsid, BOOL fDeleteSrcStm)
{
CLIPFORMAT cfOld;
CLIPFORMAT cfNew;
LPOLESTR lpszUserType = NULL;
HRESULT error;
LPSTREAM pstmSrc = NULL;
LPSTREAM pstmDst = NULL;
if (error = ReadFmtUserTypeStg(pstg, &cfOld, &lpszUserType))
return error;
if (rclsid == CLSID_StaticDib)
cfNew = CF_DIB;
else if (rclsid == CLSID_StaticMetafile)
cfNew = CF_METAFILEPICT;
else {
AssertSz(FALSE, "Internal Error: this routine shouldn't have been called for this class");
return ResultFromScode(E_FAIL);
}
if (cfOld == g_cfPBrush) {
if (cfNew != CF_DIB) {
error = ResultFromScode(DV_E_CLIPFORMAT);
goto errRtn;
}
} else if (cfOld == g_cfMSDraw) {
if (cfNew != CF_METAFILEPICT) {
error = ResultFromScode(DV_E_CLIPFORMAT);
goto errRtn;
}
} else {
// Converted to static object from some class other than PBrush or
// MSDraw. The data must be in a proper format in the CONTENTS
// stream.
return NOERROR;
}
if (error = pstg->OpenStream(OLE10_NATIVE_STREAM, NULL,
(STGM_READ|STGM_SHARE_EXCLUSIVE),
0, &pstmSrc))
goto errRtn;
if (error = OpenOrCreateStream(pstg, OLE_CONTENTS_STREAM, &pstmDst))
goto errRtn;
DWORD dwSize;
if (error = pstmSrc->Read(&dwSize, sizeof(DWORD), NULL))
goto errRtn;
if (cfOld == g_cfMSDraw) {
WORD mfp[3]; // mm, xExt, yExt
if (error = pstmSrc->Read(mfp, sizeof(mfp), NULL))
goto errRtn;
dwSize -= sizeof(mfp);
error = UtMFStmToPlaceableMFStm(pstmSrc, dwSize,
(LONG) mfp[1], (LONG) mfp[2], pstmDst);
} else {
// The PBrush native data format is DIB File format. So all we got to
// do is CopyTo.
ULARGE_INTEGER ularge_int;
ULISet32(ularge_int, dwSize);
if ((error = pstmSrc->CopyTo(pstmDst, ularge_int, NULL,
NULL)) == NOERROR)
StSetSize(pstmDst, 0, TRUE);
}
errRtn:
if (pstmDst)
pstmDst->Release();
if (pstmSrc)
pstmSrc->Release();
if (error == NOERROR) {
error = WriteFmtUserTypeStg(pstg, cfNew, lpszUserType);
if (fDeleteSrcStm)
pstg->DestroyElement(OLE10_NATIVE_STREAM);
} else {
pstg->DestroyElement(OLE_CONTENTS_STREAM);
}
if (lpszUserType)
PubMemFree(lpszUserType);
return error;
}
FARINTERNAL UtContentsStmTo10NativeStm
(LPSTORAGE pstg, REFCLSID rclsid, BOOL fDeleteSrcStm, UINT FAR* puiStatus)
{
CLIPFORMAT cf;
LPOLESTR lpszUserType = NULL;
HRESULT error;
LPSTREAM pstmSrc = NULL;
LPSTREAM pstmDst = NULL;
*puiStatus = NULL;
if (error = ReadFmtUserTypeStg(pstg, &cf, &lpszUserType))
return error;
if (! ((cf == CF_DIB && rclsid == CLSID_PBrush)
|| (cf == CF_METAFILEPICT && rclsid == CLSID_MSDraw))) {
error = ResultFromScode(DV_E_CLIPFORMAT);
goto errRtn;
}
if (error = pstg->OpenStream(OLE_CONTENTS_STREAM, NULL,
(STGM_READ|STGM_SHARE_EXCLUSIVE),
0, &pstmSrc)) {
*puiStatus |= CONVERT_NOSOURCE;
// check whether OLE10_NATIVE_STREAM exists
if (pstg->OpenStream(OLE10_NATIVE_STREAM, NULL,
(STGM_READ|STGM_SHARE_EXCLUSIVE), 0, &pstmDst))
*puiStatus |= CONVERT_NODESTINATION;
else {
pstmDst->Release();
pstmDst = NULL;
}
goto errRtn;
}
if (error = OpenOrCreateStream(pstg, OLE10_NATIVE_STREAM, &pstmDst)) {
*puiStatus |= CONVERT_NODESTINATION;
goto errRtn;
}
if (cf == CF_METAFILEPICT)
error = UtPlaceableMFStmToMSDrawNativeStm(pstmSrc, pstmDst);
else
error = UtDIBFileStmToPBrushNativeStm(pstmSrc, pstmDst);
errRtn:
if (pstmDst)
pstmDst->Release();
if (pstmSrc)
pstmSrc->Release();
if (error == NOERROR) {
LPOLESTR lpszProgId = NULL;
ProgIDFromCLSID(rclsid, &lpszProgId);
error = WriteFmtUserTypeStg(pstg,
RegisterClipboardFormat(lpszProgId),
lpszUserType);
if (lpszProgId)
delete lpszProgId;
}
if (error == NOERROR) {
if (fDeleteSrcStm)
pstg->DestroyElement(OLE_CONTENTS_STREAM);
} else {
pstg->DestroyElement(OLE10_NATIVE_STREAM);
}
if (lpszUserType)
delete lpszUserType;
return error;
}
