iTextSharp.text.pdf.PdfStamperImp.AddComments C# (CSharp) Метод

        public void AddComments(FdfReader fdf)
        {
            if (readers2intrefs.ContainsKey(fdf))
                return;
            PdfDictionary catalog = fdf.Catalog;
            catalog = catalog.GetAsDict(PdfName.FDF);
            if (catalog == null)
                return;
            PdfArray annots = catalog.GetAsArray(PdfName.ANNOTS);
            if (annots == null || annots.Size == 0)
                return;
            RegisterReader(fdf, false);
            IntHashtable hits = new IntHashtable();
            Dictionary<String, PdfObject> irt = new Dictionary<string,PdfObject>();
            List<PdfObject> an = new List<PdfObject>();
            for (int k = 0; k < annots.Size; ++k) {
                PdfObject obj = annots[k];
                PdfDictionary annot = (PdfDictionary)PdfReader.GetPdfObject(obj);
                PdfNumber page = annot.GetAsNumber(PdfName.PAGE);
                if (page == null || page.IntValue >= reader.NumberOfPages)
                    continue;
                FindAllObjects(fdf, obj, hits);
                an.Add(obj);
                if (obj.Type == PdfObject.INDIRECT) {
                    PdfObject nm = PdfReader.GetPdfObject(annot.Get(PdfName.NM));
                    if (nm != null && nm.Type == PdfObject.STRING)
                        irt[nm.ToString()] = obj;
                }
            }
            int[] arhits = hits.GetKeys();
            for (int k = 0; k < arhits.Length; ++k) {
                int n = arhits[k];
                PdfObject obj = fdf.GetPdfObject(n);
                if (obj.Type == PdfObject.DICTIONARY) {
                    PdfObject str = PdfReader.GetPdfObject(((PdfDictionary)obj).Get(PdfName.IRT));
                    if (str != null && str.Type == PdfObject.STRING) {
                        PdfObject i;
                        irt.TryGetValue(str.ToString(), out i);
                        if (i != null) {
                            PdfDictionary dic2 = new PdfDictionary();
                            dic2.Merge((PdfDictionary)obj);
                            dic2.Put(PdfName.IRT, i);
                            obj = dic2;
                        }
                    }
                }
                AddToBody(obj, GetNewObjectNumber(fdf, n, 0));
            }
            for (int k = 0; k < an.Count; ++k) {
                PdfObject obj = an[k];
                PdfDictionary annot = (PdfDictionary)PdfReader.GetPdfObject(obj);
                PdfNumber page = annot.GetAsNumber(PdfName.PAGE);
                PdfDictionary dic = reader.GetPageN(page.IntValue + 1);
                PdfArray annotsp = (PdfArray)PdfReader.GetPdfObject(dic.Get(PdfName.ANNOTS), dic);
                if (annotsp == null) {
                    annotsp = new PdfArray();
                    dic.Put(PdfName.ANNOTS, annotsp);
                    MarkUsed(dic);
                }
                MarkUsed(annotsp);
                annotsp.Add(obj);
            }
        }