static std::wstring SHGetPathFromIDListLongPath(LPCITEMIDLIST pidl)
{
std::wstring pszPath(MAX_PATH, 0);
while (!SHGetPathFromIDListEx(pidl, &pszPath[0], (DWORD)pszPath.size(), 0))
{
if (pszPath.size() >= SHRT_MAX)
{
// Clearly not succeeding at all, bail
return std::wstring();
}
pszPath.resize(pszPath.size() * 2);
}
return pszPath;
}
//
// Creates a HDROP (Win 3.1 compatible file list) from DS_HIDA.
//
//
HRESULT CDS_IDLData_GetHDrop(IDataObject *pdtobj, STGMEDIUM *pmedium, BOOL fAltName)
{
HRESULT hres = E_OUTOFMEMORY;
LPITEMIDLIST pidl = NULL; // realloced in HIDA_FillIDList
STGMEDIUM medium;
TCHAR szPath[MAX_PATH];
UINT i, cbAlloc = SIZEOF(DROPFILES) + SIZEOF(TCHAR); // header + null terminator
LPIDA pida = DataObj_GetDS_HIDA(pdtobj, &medium);
Assert(pida && pida->cidl); // we created this
for (i = 0; i < pida->cidl; i++)
{
// HIDA_FillIDList may realloc pidl
LPITEMIDLIST pidlTemp = HIDA_FillIDList(medium.hGlobal, i, pidl);
if (pidlTemp == NULL)
{
// hres = E_OUTOFMEMORY; // already set
break;
}
pidl = pidlTemp;
// We may ask for the ALT name even if they did not ask for it in the
// case where we failed to get the long name...
if (!SHGetPathFromIDListEx(pidl, szPath, fAltName)
&& !(!fAltName && (SHGetPathFromIDListEx(pidl, szPath, TRUE))))
{
// The path probably exceeds the max lenght, lets Bail...
DebugMsg(DM_TRACE, TEXT("s.CFSIDLData_GetHDrop: SHGetPathFromIDList failed."));
hres = E_FAIL;
goto Abort;
}
cbAlloc += lstrlen(szPath) * SIZEOF(TCHAR) + SIZEOF(TCHAR);
}
pmedium->hGlobal = GlobalAlloc(GPTR, cbAlloc);
if (pmedium->hGlobal)
{
LPDROPFILES pdf = (LPDROPFILES)pmedium->hGlobal;
LPTSTR pszFiles = (LPTSTR)(pdf + 1);
pdf->pFiles = SIZEOF(DROPFILES);
Assert(pdf->pt.x==0);
Assert(pdf->pt.y==0);
Assert(pdf->fNC==FALSE);
Assert(pdf->fWide==FALSE);
#ifdef UNICODE
pdf->fWide = TRUE;
#endif
for (i = 0; i < pida->cidl; i++)
{
LPITEMIDLIST pidlTemp = HIDA_FillIDList(medium.hGlobal, i, pidl);
Assert(pidl == pidlTemp);
// Don't read directly into buffer as we my have been forced to use alternate name and the
// total path we allocated may be smaller than we would tromp on which will screw up the heap.
if (!SHGetPathFromIDListEx(pidl, szPath, fAltName))
SHGetPathFromIDListEx(pidl, szPath, TRUE);
lstrcpy(pszFiles, szPath);
pszFiles += lstrlen(pszFiles) + 1;
Assert((UINT)((LPBYTE)pszFiles - (LPBYTE)pdf) < cbAlloc);
}
Assert((LPTSTR)((LPBYTE)pdf + cbAlloc - SIZEOF(TCHAR)) == pszFiles);
Assert(*pszFiles == 0); // zero init alloc
pmedium->tymed = TYMED_HGLOBAL;
pmedium->pUnkForRelease = NULL;
hres = S_OK;
}
Abort:
HIDA_ReleaseStgMedium(pida, &medium);
ILFree(pidl);
return hres;
}
