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- /*
- * IDATAOBJ.CPP
- * Cosmo Chapter 23
- *
- * Implementation of the IDataObject interface.
- *
- * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
- *
- * Kraig Brockschmidt, Microsoft
- * Internet : kraigb@microsoft.com
- * Compuserve: >INTERNET:kraigb@microsoft.com
- */
-
-
- #include "cosmo.h"
-
-
- /*
- * CImpIDataObject::CImpIDataObject
- * CImpIDataObject::~CImpIDataObject
- *
- * Parameters (Constructor):
- * pObj PCFigure of the object we're in.
- * pUnkOuter LPUNKNOWN to which we delegate.
- */
-
- CImpIDataObject::CImpIDataObject(PCFigure pObj
- , LPUNKNOWN pUnkOuter)
- {
- m_cRef=0;
- m_pObj=pObj;
- m_pUnkOuter=pUnkOuter;
- return;
- }
-
- CImpIDataObject::~CImpIDataObject(void)
- {
- return;
- }
-
-
-
-
- /*
- * CImpIDataObject::QueryInterface
- * CImpIDataObject::AddRef
- * CImpIDataObject::Release
- */
-
- STDMETHODIMP CImpIDataObject::QueryInterface(REFIID riid, PPVOID ppv)
- {
- return m_pUnkOuter->QueryInterface(riid, ppv);
- }
-
- STDMETHODIMP_(ULONG) CImpIDataObject::AddRef(void)
- {
- ++m_cRef;
- return m_pUnkOuter->AddRef();
- }
-
- STDMETHODIMP_(ULONG) CImpIDataObject::Release(void)
- {
- --m_cRef;
- return m_pUnkOuter->Release();
- }
-
-
-
-
-
- /*
- * CImpIDataObject::GetData
- *
- * Purpose:
- * Retrieves data described by a specific FormatEtc into a StgMedium
- * allocated by this function. Used like GetClipboardData.
- *
- * Parameters:
- * pFE LPFORMATETC describing the desired data.
- * pSTM LPSTGMEDIUM in which to return the data.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::GetData(LPFORMATETC pFE
- , LPSTGMEDIUM pSTM)
- {
- UINT cf=pFE->cfFormat;
- BOOL fRet=FALSE;
-
- //Another part of us already knows if the format is good.
- if (NOERROR!=QueryGetData(pFE))
- return ResultFromScode(DATA_E_FORMATETC);
-
- if (CF_METAFILEPICT==cf || CF_BITMAP==cf || m_pObj->m_cf==cf)
- {
- if (CF_METAFILEPICT==cf)
- {
- pSTM->tymed=TYMED_MFPICT;
- }
- else
- pSTM->tymed=TYMED_HGLOBAL;
-
- pSTM->pUnkForRelease=NULL;
- pSTM->hGlobal=m_pObj->m_pDoc->RenderFormat(cf);
- fRet=(NULL!=pSTM->hGlobal);
- }
- else
- fRet=m_pObj->m_pDoc->RenderMedium(cf, pSTM);
-
- return fRet ? NOERROR : ResultFromScode(DATA_E_FORMATETC);
- }
-
-
-
-
- /*
- * CImpIDataObject::GetDataHere
- *
- * Purpose:
- * Renders the specific FormatEtc into caller-allocated medium
- * provided in pSTM.
- *
- * Parameters:
- * pFE LPFORMATETC describing the desired data.
- * pSTM LPSTGMEDIUM providing the medium into which
- * wer render the data.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::GetDataHere(LPFORMATETC pFE
- , LPSTGMEDIUM pSTM)
- {
- UINT cf;
- LONG lRet;
-
- /*
- * The only reasonable time this is called is for
- * CFSTR_EMBEDSOURCE and TYMED_ISTORAGE (and later for
- * CFSTR_LINKSOURCE). This means the same as
- * IPersistStorage::Save.
- */
-
- cf=RegisterClipboardFormat(CFSTR_EMBEDSOURCE);
-
- //Aspect is unimportant to us here, as is lindex and ptd.
- if (cf==pFE->cfFormat && (TYMED_ISTORAGE & pFE->tymed))
- {
- //We have an IStorage we can write into.
- pSTM->tymed=TYMED_ISTORAGE;
- pSTM->pUnkForRelease=NULL;
- lRet=m_pObj->m_pPL->WriteToStorage(pSTM->pstg
- , VERSIONCURRENT);
-
- //These are for creating an embedded object from a file
- WriteClassStg(pSTM->pstg, CLSID_CosmoFigure);
- WriteFmtUserTypeStg(pSTM->pstg, m_pObj->m_cf
- , (*m_pObj->m_pST)[IDS_USERTYPE]);
-
- if (lRet >= 0)
- return NOERROR;
-
- return ResultFromScode(STG_E_WRITEFAULT);
- }
-
- return ResultFromScode(DATA_E_FORMATETC);
- }
-
-
-
-
-
-
- /*
- * CImpIDataObject::QueryGetData
- *
- * Purpose:
- * Tests if a call to GetData with this FormatEtc will provide
- * any rendering; used like IsClipboardFormatAvailable.
- *
- * Parameters:
- * pFE LPFORMATETC describing the desired data.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::QueryGetData(LPFORMATETC pFE)
- {
- UINT cf=pFE->cfFormat;
- UINT i;
-
- //Check the aspects we support.
- if (!(DVASPECT_CONTENT & pFE->dwAspect))
- return ResultFromScode(S_FALSE);
-
- for (i=0; i < m_pObj->m_cfeGet; i++)
- {
- if (pFE->cfFormat==m_pObj->m_rgfeGet[i].cfFormat
- && pFE->tymed & m_pObj->m_rgfeGet[i].tymed)
- {
- return NOERROR;
- }
- }
-
- return ResultFromScode(S_FALSE);
- }
-
-
-
-
-
- /*
- * CImpIDataObject::GetCanonicalFormatEtc
- *
- * Purpose:
- * Provides the caller with an equivalent FormatEtc to the one
- * provided when different FormatEtcs will produce exactly the
- * same renderings.
- *
- * Parameters:
- * pFEIn LPFORMATETC of the first description.
- * pFEOut LPFORMATETC of the equal description.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::GetCanonicalFormatEtc
- (LPFORMATETC pFEIn, LPFORMATETC pFEOut)
- {
- if (NULL==pFEOut)
- return ResultFromScode(E_INVALIDARG);
-
- pFEOut->ptd=NULL;
- return ResultFromScode(DATA_S_SAMEFORMATETC);
- }
-
-
-
-
-
-
- /*
- * CImpIDataObject::SetData
- *
- * Purpose:
- * Places data described by a FormatEtc and living in a StgMedium
- * into the object. The object may be responsible to clean up the
- * StgMedium before exiting.
- *
- * Parameters:
- * pFE LPFORMATETC describing the data to set.
- * pSTM LPSTGMEDIUM containing the data.
- * fRelease BOOL indicating if this function is responsible
- * for freeing the data.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::SetData(LPFORMATETC pFE
- , LPSTGMEDIUM pSTM, BOOL fRelease)
- {
- LONG lRet;
-
- /*
- * Data can only come from global memory containing a
- * POLYLINEDATA structure that we send to the Polyline's
- * DataSetMem.
- */
- if ((pFE->cfFormat!=m_pObj->m_cf)
- || !(DVASPECT_CONTENT & pFE->dwAspect)
- || (TYMED_HGLOBAL!=pSTM->tymed))
- return ResultFromScode(DATA_E_FORMATETC);
-
- lRet=m_pObj->m_pPL->DataSetMem(pSTM->hGlobal, FALSE, TRUE
- , TRUE);
-
- if (fRelease)
- ReleaseStgMedium(pSTM);
-
- return (POLYLINE_E_NONE==lRet) ?
- NOERROR : ResultFromScode(DATA_E_FORMATETC);
- }
-
-
-
-
-
-
- /*
- * CImpIDataObject::EnumFormatEtc
- *
- * Purpose:
- * Returns an IEnumFORMATETC object through which the caller can
- * iterate to learn about all the data formats this object can
- * provide through either GetData[Here] or SetData.
- *
- * Parameters:
- * dwDir DWORD describing a data direction, either
- * DATADIR_SET or DATADIR_GET.
- * ppEnum LPENUMFORMATETC * in which to return the
- * pointer to the enumerator.
- *
- * Return Value:
- * HRESULT NOERROR or a general error value.
- */
-
- STDMETHODIMP CImpIDataObject::EnumFormatEtc(DWORD dwDir
- , LPENUMFORMATETC *ppEnum)
- {
- return ResultFromScode(OLE_S_USEREG);
- }
-
-
-
-
-
- /*
- * CImpIDataObject::DAdvise
- * CImpIDataObject::DUnadvise
- * CImpIDataObject::EnumDAdvise
- *
- * Pass-throughs to IDataAdviseHolder.
- */
-
- STDMETHODIMP CImpIDataObject::DAdvise(LPFORMATETC pFE, DWORD dwFlags
- , LPADVISESINK pIAdviseSink, LPDWORD pdwConn)
- {
- HRESULT hr;
-
- if (NULL==m_pObj->m_pIDataAdviseHolder)
- {
- hr=CreateDataAdviseHolder(&m_pObj->m_pIDataAdviseHolder);
-
- if (FAILED(hr))
- return ResultFromScode(E_OUTOFMEMORY);
- }
-
- hr=m_pObj->m_pIDataAdviseHolder->Advise(this, pFE
- , dwFlags, pIAdviseSink, pdwConn);
-
- return hr;
- }
-
-
- STDMETHODIMP CImpIDataObject::DUnadvise(DWORD dwConn)
- {
- if (NULL==m_pObj->m_pIDataAdviseHolder)
- return ResultFromScode(E_FAIL);
-
- return m_pObj->m_pIDataAdviseHolder->Unadvise(dwConn);
- }
-
-
-
- STDMETHODIMP CImpIDataObject::EnumDAdvise(LPENUMSTATDATA *ppEnum)
- {
- if (NULL==m_pObj->m_pIDataAdviseHolder)
- return ResultFromScode(E_FAIL);
-
- return m_pObj->m_pIDataAdviseHolder->EnumAdvise(ppEnum);
- }
-