iTextSharp.text.pdf.AcroFields.Fill C# (CSharp) Метод

        internal void Fill() {
            fields = new Hashtable();
            PdfDictionary top = (PdfDictionary)PdfReader.GetPdfObjectRelease(reader.Catalog.Get(PdfName.ACROFORM));
            if (top == null)
                return;
            PdfArray arrfds = (PdfArray)PdfReader.GetPdfObjectRelease(top.Get(PdfName.FIELDS));
            if (arrfds == null || arrfds.Size == 0)
                return;
            for (int k = 1; k <= reader.NumberOfPages; ++k) {
                PdfDictionary page = reader.GetPageNRelease(k);
                PdfArray annots = (PdfArray)PdfReader.GetPdfObjectRelease(page.Get(PdfName.ANNOTS), page);
                if (annots == null)
                    continue;
                for (int j = 0; j < annots.Size; ++j) {
                    PdfDictionary annot = annots.GetAsDict(j);
                    if (annot == null) {
                        PdfReader.ReleaseLastXrefPartial(annots.GetAsIndirectObject(j));
                        continue;
                    }
                    if (!PdfName.WIDGET.Equals(annot.GetAsName(PdfName.SUBTYPE))) {
                        PdfReader.ReleaseLastXrefPartial(annots.GetAsIndirectObject(j));
                        continue;
                    }
                    PdfDictionary widget = annot;
                    PdfDictionary dic = new PdfDictionary();
                    dic.Merge(annot);
                    String name = "";
                    PdfDictionary value = null;
                    PdfObject lastV = null;
                    while (annot != null) {
                        dic.MergeDifferent(annot);
                        PdfString t = annot.GetAsString(PdfName.T);
                        if (t != null)
                            name = t.ToUnicodeString() + "." + name;
                        if (lastV == null && annot.Get(PdfName.V) != null)
                            lastV = PdfReader.GetPdfObjectRelease(annot.Get(PdfName.V));
                        if (value == null &&  t != null) {
                            value = annot;
                            if (annot.Get(PdfName.V) == null && lastV  != null)
                                value.Put(PdfName.V, lastV);
                        }
                        annot = annot.GetAsDict(PdfName.PARENT);
                    }
                    if (name.Length > 0)
                        name = name.Substring(0, name.Length - 1);
                    Item item = (Item)fields[name];
                    if (item == null) {
                        item = new Item();
                        fields[name] = item;
                    }
                    if (value == null)
                        item.AddValue(widget);
                    else
                        item.AddValue(value);
                    item.AddWidget(widget);
                    item.AddWidgetRef(annots.GetAsIndirectObject(j)); // must be a reference
                    if (top != null)
                        dic.MergeDifferent(top);
                    item.AddMerged(dic);
                    item.AddPage(k);
                    item.AddTabOrder(j);
                }
            }
            // some tools produce invisible signatures without an entry in the page annotation array
            // look for a single level annotation
            PdfNumber sigFlags = top.GetAsNumber(PdfName.SIGFLAGS);
            if (sigFlags == null || (sigFlags.IntValue & 1) != 1)
                return;
            for (int j = 0; j < arrfds.Size; ++j) {
                PdfDictionary annot = arrfds.GetAsDict(j);
                if (annot == null) {
                    PdfReader.ReleaseLastXrefPartial(arrfds.GetAsIndirectObject(j));
                    continue;
                }
                if (!PdfName.WIDGET.Equals(annot.GetAsName(PdfName.SUBTYPE))) {
                    PdfReader.ReleaseLastXrefPartial(arrfds.GetAsIndirectObject(j));
                    continue;
                }
                PdfArray kids = (PdfArray)PdfReader.GetPdfObjectRelease(annot.Get(PdfName.KIDS));
                if (kids != null)
                    continue;
                PdfDictionary dic = new PdfDictionary();
                dic.Merge(annot);
                PdfString t = annot.GetAsString(PdfName.T);
                if (t == null)
                    continue;
                String name = t.ToUnicodeString();
                if (fields.ContainsKey(name))
                    continue;
                Item item = new Item();
                fields[name] = item;
                item.AddValue(dic);
                item.AddWidget(dic);
                item.AddWidgetRef(arrfds.GetAsIndirectObject(j)); // must be a reference
                item.AddMerged(dic);
                item.AddPage(-1);
                item.AddTabOrder(-1);
            }
        }