Ejemplo n.º 1
0
        /// <summary>
        /// Reads the compressed object with the specified index in the object stream
        /// of the object with the specified object id.
        /// </summary>
        internal PdfReference ReadCompressedObject(PdfObjectID objectID, int index)
        {
            PdfReference iref;
#if true
            Debug.Assert(_document._irefTable.ObjectTable.ContainsKey(objectID));
            if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
            {
                throw new NotImplementedException("This case is not coded or something else went wrong");
            }
#else
            // We should never come here because the object stream must be a type 1 entry in the xref stream
            // and iref was created before.

            // Has the specified object already an iref in the object table?
            if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
            {
                try
                {
#if true_
                    iref = new PdfReference(objectID,);
                    iref.ObjectID = objectID;
                    _document._irefTable.Add(os);
#else
                    PdfDictionary dict = (PdfDictionary)ReadObject(null, objectID, false, false);
                    PdfObjectStream os = new PdfObjectStream(dict);
                    iref = new PdfReference(os);
                    iref.ObjectID = objectID;
                    _document._irefTable.Add(os);
#endif
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.Message);
                    throw;
                }
            }
#endif

            // Read in object stream object when we come here for the very first time.
            if (iref.Value == null)
            {
                try
                {
                    Debug.Assert(_document._irefTable.Contains(iref.ObjectID));
                    PdfDictionary pdfObject = (PdfDictionary)ReadObject(null, iref.ObjectID, false, false);
                    PdfObjectStream objectStream = new PdfObjectStream(pdfObject);
                    Debug.Assert(objectStream.Reference == iref);
                    // objectStream.Reference = iref; Superfluous, see Assert in line before.
                    Debug.Assert(objectStream.Reference.Value != null, "Something went wrong.");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.Message);
                    throw;
                }
            }
            Debug.Assert(iref.Value != null);

            PdfObjectStream objectStreamStream = iref.Value as PdfObjectStream;
            if (objectStreamStream == null)
            {
                Debug.Assert(((PdfDictionary)iref.Value).Elements.GetName("/Type") == "/ObjStm");

                objectStreamStream = new PdfObjectStream((PdfDictionary)iref.Value);
                Debug.Assert(objectStreamStream.Reference == iref);
                // objectStream.Reference = iref; Superfluous, see Assert in line before.
                Debug.Assert(objectStreamStream.Reference.Value != null, "Something went wrong.");
            }
            Debug.Assert(objectStreamStream != null);


            //PdfObjectStream objectStreamStream = (PdfObjectStream)iref.Value;
            if (objectStreamStream == null)
                throw new Exception("Something went wrong here.");
            return objectStreamStream.ReadCompressedObject(index);
        }
Ejemplo n.º 2
0
        /// <summary>
        /// Reads the irefs from the compressed object with the specified index in the object stream
        /// of the object with the specified object id.
        /// </summary>
        internal void ReadIRefsFromCompressedObject(PdfObjectID objectID)
        {
            PdfReference iref;

            Debug.Assert(_document._irefTable.ObjectTable.ContainsKey(objectID));
            if (!_document._irefTable.ObjectTable.TryGetValue(objectID, out iref))
            {
                // We should never come here because the object stream must be a type 1 entry in the xref stream
                // and iref was created before.
                throw new NotImplementedException("This case is not coded or something else went wrong");
            }

            // Read in object stream object when we come here for the very first time.
            if (iref.Value == null)
            {
                try
                {
                    Debug.Assert(_document._irefTable.Contains(iref.ObjectID));
                    PdfDictionary pdfObject = (PdfDictionary)ReadObject(null, iref.ObjectID, false, false);
                    PdfObjectStream objectStream = new PdfObjectStream(pdfObject);
                    Debug.Assert(objectStream.Reference == iref);
                    // objectStream.Reference = iref; Superfluous, see Assert in line before.
                    Debug.Assert(objectStream.Reference.Value != null, "Something went wrong.");
                }
                catch (Exception ex)
                {
                    Debug.WriteLine(ex.Message);
                    throw;
                }
            }
            Debug.Assert(iref.Value != null);

            PdfObjectStream objectStreamStream = iref.Value as PdfObjectStream;
            if (objectStreamStream == null)
            {
                Debug.Assert(((PdfDictionary)iref.Value).Elements.GetName("/Type") == "/ObjStm");

                objectStreamStream = new PdfObjectStream((PdfDictionary)iref.Value);
                Debug.Assert(objectStreamStream.Reference == iref);
                // objectStream.Reference = iref; Superfluous, see Assert in line before.
                Debug.Assert(objectStreamStream.Reference.Value != null, "Something went wrong.");
            }
            Debug.Assert(objectStreamStream != null);


            //PdfObjectStream objectStreamStream = (PdfObjectStream)iref.Value;
            if (objectStreamStream == null)
                throw new Exception("Something went wrong here.");
            objectStreamStream.ReadReferences(_document._irefTable);
        }