/// <summary>
/// Gets the next n child accessible objects.
/// </summary>
unsafe HRESULT Oleaut32.IEnumVariant.Next(uint celt, IntPtr rgVar, uint *pCeltFetched)
{
// NOTE: rgvar is a pointer to an array of variants
if (owner.IsClientObject)
{
Debug.WriteLineIf(CompModSwitches.MSAA.TraceInfo, "EnumVariantObject: owner = " + owner.ToString() + ", celt = " + celt);
Debug.Indent();
int childCount;
int[]? newOrder;
if ((childCount = owner.GetChildCount()) >= 0)
{
NextFromChildCollection(celt, rgVar, pCeltFetched, childCount);
}
else if (owner.systemIEnumVariant is null)
{
NextEmpty(celt, rgVar, pCeltFetched);
}
else if ((newOrder = owner.GetSysChildOrder()) != null)
{
NextFromSystemReordered(celt, rgVar, pCeltFetched, newOrder);
}
else
{
NextFromSystem(celt, rgVar, pCeltFetched);
}
Debug.Unindent();
}
else
{
NextFromSystem(celt, rgVar, pCeltFetched);
}
if (pCeltFetched is null)
{
return(HRESULT.S_OK);
}
// Tell caller whether requested number of items was returned. Once list of items has
// been exhausted, we return S_FALSE so that caller knows to stop calling this method.
return(*pCeltFetched == celt ? HRESULT.S_OK : HRESULT.S_FALSE);
}
