private static PdfDocument GetDocEnsureIndirect(PdfStructElem structElem)
{
PdfIndirectReference indRef = structElem.GetPdfObject().GetIndirectReference();
if (indRef == null)
{
throw new PdfException(PdfException.StructureElementDictionaryShallBeAnIndirectObjectInOrderToHaveChildren
);
}
return(indRef.GetDocument());
}
protected internal virtual PdfDocument GetDocument()
{
PdfDictionary structDict = GetPdfObject();
PdfIndirectReference indRef = structDict.GetIndirectReference();
if (indRef == null && structDict.GetAsDictionary(PdfName.P) != null)
{
// If parent is direct - it's definitely an invalid structure tree.
// MustBeIndirect state won't be met during reading, and all newly created struct elements shall have ind ref.
indRef = structDict.GetAsDictionary(PdfName.P).GetIndirectReference();
}
return(indRef != null?indRef.GetDocument() : null);
}