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wbidataobject.c
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256 lines (200 loc) · 5.11 KB
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#ifndef WBDED_INC
#include "wbded.h"
#endif
#include <stdio.h> // for printf()
static FORMATETC *formats;
static int nformats;
HRESULT CreateEnumFormatEtc(UINT nNumFormats, FORMATETC *pFormatEtc, IEnumFORMATETC **ppEnumFormatEtc);
HGLOBAL DupMem(HGLOBAL hMem)
{
// lock the source memory object
DWORD len = GlobalSize(hMem);
PVOID source = GlobalLock(hMem);
// create a fixed "global" block - i.e. just
// a regular lump of our process heap
PVOID dest = GlobalAlloc(GMEM_FIXED, len);
memcpy(dest, source, len);
GlobalUnlock(hMem);
return dest;
}
static int LookupFormatEtc(WB_IDataObject* This, FORMATETC *pFormatEtc)
{
int i;
for(i = 0; i < This->m_nNumFormats; i++)
{
if((pFormatEtc->tymed & This->m_pFormatEtc[i].tymed) &&
pFormatEtc->cfFormat == This->m_pFormatEtc[i].cfFormat &&
pFormatEtc->dwAspect == This->m_pFormatEtc[i].dwAspect)
{
return i;
}
}
return -1;
}
static ULONG STDMETHODCALLTYPE
idataobject_addref (WB_IDataObject *This)
{
WB_IDataObject *dobj = This;
int ref_count = ++dobj->ref_count;
return InterlockedIncrement(&This->m_lRefCount);
}
static HRESULT STDMETHODCALLTYPE
idataobject_queryinterface (WB_IDataObject *This,
REFIID riid,
LPVOID *ppvObject)
{
*ppvObject = NULL;
if (IsEqualGUID (riid, &IID_IUnknown))
{
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else if (IsEqualGUID (riid, &IID_IDataObject))
{
idataobject_addref (This);
*ppvObject = This;
return S_OK;
}
else
{
return E_NOINTERFACE;
}
}
static ULONG STDMETHODCALLTYPE
idataobject_release (WB_IDataObject *This)
{
WB_IDataObject *dobj = This;
int ref_count = --dobj->ref_count;
if (ref_count == 0)
g_free (This);
return ref_count;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdata (WB_IDataObject *This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
int idx;
//
// try to match the requested FORMATETC with one of our supported formats
//
if((idx = LookupFormatEtc(This, pFormatEtc)) == -1)
{
return DV_E_FORMATETC;
}
//
// found a match! transfer the data into the supplied storage-medium
//
pMedium->tymed = This->m_pFormatEtc[idx].tymed;
pMedium->pUnkForRelease = 0;
switch(This->m_pFormatEtc[idx].tymed)
{
case TYMED_HGLOBAL:
pMedium->hGlobal = DupMem(This->m_pStgMedium[idx].hGlobal);
//return S_OK;
break;
default:
return DV_E_FORMATETC;
}
return S_OK;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getdatahere (LPWBDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium)
{
return DATA_E_FORMATETC;
}
static HRESULT __stdcall
idataobject_querygetdata (LPWBDATAOBJECT This,
LPFORMATETC pFormatEtc)
{
return (LookupFormatEtc((LPWBDATAOBJECT)This, pFormatEtc) == -1) ? DV_E_FORMATETC : S_OK;
}
static HRESULT STDMETHODCALLTYPE
idataobject_getcanonicalformatetc (LPWBDATAOBJECT This,
LPFORMATETC pFormatEtcIn,
LPFORMATETC pFormatEtcOut)
{
pFormatEtcOut->ptd = NULL;
return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_setdata (LPWBDATAOBJECT This,
LPFORMATETC pFormatEtc,
LPSTGMEDIUM pMedium,
BOOL fRelease)
{
return E_UNEXPECTED;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumformatetc (LPWBDATAOBJECT This,
DWORD dwDirection,
LPENUMFORMATETC *ppEnumFormatEtc)
{
if (dwDirection != DATADIR_GET) {
return E_NOTIMPL;
}
return CreateEnumFormatEtc(This->m_nNumFormats, This->m_pFormatEtc, ppEnumFormatEtc);
}
static HRESULT STDMETHODCALLTYPE
idataobject_dadvise (LPWBDATAOBJECT This,
LPFORMATETC pFormatetc,
DWORD advf,
LPADVISESINK pAdvSink,
DWORD *pdwConnection)
{
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_dunadvise (LPWBDATAOBJECT This,
DWORD dwConnection)
{
return E_FAIL;
}
static HRESULT STDMETHODCALLTYPE
idataobject_enumdadvise (LPWBDATAOBJECT This,
LPENUMSTATDATA *ppenumAdvise)
{
return E_FAIL;
}
static WB_IDataObjectVtbl ido_vtbl = {
idataobject_queryinterface,
idataobject_addref,
idataobject_release,
idataobject_getdata,
idataobject_getdatahere,
idataobject_querygetdata,
idataobject_getcanonicalformatetc,
idataobject_setdata,
idataobject_enumformatetc,
idataobject_dadvise,
idataobject_dunadvise,
idataobject_enumdadvise
};
WB_IDataObject * WB_IDataObject_new (int count)
{
WB_IDataObject *result;
result = g_new0(WB_IDataObject, 1);
(WB_IDataObjectVtbl*)result->ido.lpVtbl = &ido_vtbl;
result->m_lRefCount = 1;
result->ref_count = 1;
result->m_nNumFormats = count;
result->m_pFormatEtc = g_new0 (FORMATETC, count);
result->m_pStgMedium = g_new0 (STGMEDIUM, count);
return result;
}
HRESULT CreateDataObject (FORMATETC *format, STGMEDIUM *medium, int count, WB_IDataObject **ppDataObject)
{
int i;
if(ppDataObject == 0)
return E_INVALIDARG;
*ppDataObject = WB_IDataObject_new(count);
for(i = 0; i < count; i++)
{
(*ppDataObject)->m_pFormatEtc[i] = format[i];
(*ppDataObject)->m_pStgMedium[i] = medium[i];
}
return (*ppDataObject) ? S_OK : E_OUTOFMEMORY;
}