iTextSharp.text.pdf.PdfWriter.FillOCProperties C# (CSharp) Méthode

        protected void FillOCProperties(bool erase)
        {
            if (vOCProperties == null)
                vOCProperties = new PdfOCProperties();
            if (erase) {
                vOCProperties.Remove(PdfName.OCGS);
                vOCProperties.Remove(PdfName.D);
            }
            if (vOCProperties.Get(PdfName.OCGS) == null) {
                PdfArray gr = new PdfArray();
                foreach (PdfLayer layer in documentOCG.Keys) {
                    gr.Add(layer.Ref);
                }
                vOCProperties.Put(PdfName.OCGS, gr);
            }
            if (vOCProperties.Get(PdfName.D) != null)
                return;
            List<IPdfOCG> docOrder = new List<IPdfOCG>(documentOCGorder);
            for (ListIterator<IPdfOCG> it = new ListIterator<IPdfOCG>(docOrder); it.HasNext();) {
                PdfLayer layer = (PdfLayer)it.Next();
                if (layer.Parent != null)
                    it.Remove();
            }
            PdfArray order = new PdfArray();
            foreach (PdfLayer layer in docOrder) {
                GetOCGOrder(order, layer);
            }
            PdfDictionary d = new PdfDictionary();
            vOCProperties.Put(PdfName.D, d);
            d.Put(PdfName.ORDER, order);
            PdfArray grx = new PdfArray();
            foreach (PdfLayer layer in documentOCG.Keys) {
                if (!layer.On)
                    grx.Add(layer.Ref);
            }
            if (grx.Size > 0)
                d.Put(PdfName.OFF, grx);
            if (OCGRadioGroup.Size > 0)
                d.Put(PdfName.RBGROUPS, OCGRadioGroup);
            if (OCGLocked.Size > 0)
                d.Put(PdfName.LOCKED, OCGLocked);
            AddASEvent(PdfName.VIEW, PdfName.ZOOM);
            AddASEvent(PdfName.VIEW, PdfName.VIEW);
            AddASEvent(PdfName.PRINT, PdfName.PRINT);
            AddASEvent(PdfName.EXPORT, PdfName.EXPORT);
            d.Put(PdfName.LISTMODE, PdfName.VISIBLEPAGES);
        }