Example #1
0
 public Parser(PdfDocument document)
 {
   this.document = document;
   this.lexer = document.lexer;
   this.stack = new ShiftStack();
 }
Example #2
0
    /// <summary>
    /// Opens an existing PDF document.
    /// </summary>
    public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider)
    {
      PdfDocument document = null;
      try
      {
        Lexer lexer = new Lexer(stream);
        document = new PdfDocument(lexer);
        document.state |= DocumentState.Imported;
        document.openMode = openmode;
        document.fileSize = stream.Length;

        // Get file version
        byte[] header = new byte[1024];
        stream.Position = 0;
        stream.Read(header, 0, 1024);
        document.version = GetPdfFileVersion(header);
        if (document.version == 0)
          throw new InvalidOperationException(PSSR.InvalidPdf);

        // Read all trailers
        document.irefTable.IsUnderConstruction = true;
        Parser parser = new Parser(document);
        document.trailer = parser.ReadTrailer();

        document.irefTable.IsUnderConstruction = false;

        // Is document encrypted?
        PdfReference xrefEncrypt = document.trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference;
        if (xrefEncrypt != null)
        {
          //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false);
          PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false);

          encrypt.Reference = xrefEncrypt;
          xrefEncrypt.Value = encrypt;
          PdfStandardSecurityHandler securityHandler = document.SecurityHandler;
        TryAgain:
          PasswordValidity validity = securityHandler.ValidatePassword(password);
          if (validity == PasswordValidity.Invalid)
          {
            if (passwordProvider != null)
            {
              PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
              passwordProvider(args);
              if (args.Abort)
                return null;
              password = args.Password;
              goto TryAgain;
            }
            else
            {
              if (password == null)
                throw new PdfReaderException(PSSR.PasswordRequired);
              else
                throw new PdfReaderException(PSSR.InvalidPassword);
            }
          }
          else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify)
          {
            if (passwordProvider != null)
            {
              PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
              passwordProvider(args);
              if (args.Abort)
                return null;
              password = args.Password;
              goto TryAgain;
            }
            else
              throw new PdfReaderException(PSSR.OwnerPasswordRequired);
          }
        }
        else
        {
          if (password != null)
          {
            // Password specified but document is not encrypted.
            // ignore
          }
        }

        PdfReference[] irefs = document.irefTable.AllReferences;
        int count = irefs.Length;

        // Read all indirect objects
        for (int idx = 0; idx < count; idx++)
        {
          PdfReference iref = irefs[idx];
          if (iref.Value == null)
          {
            try
            {
              Debug.Assert(document.irefTable.Contains(iref.ObjectID));
              PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false);
              Debug.Assert(pdfObject.Reference == iref);
              pdfObject.Reference = iref;
              Debug.Assert(pdfObject.Reference.Value != null, "something got wrong");
            }
            catch (Exception ex)
            {
              Debug.WriteLine(ex.Message);
            }
          }
          else
          {
            Debug.Assert(document.irefTable.Contains(iref.ObjectID));
            iref.GetType();
          }
          // Set maximum object number
          document.irefTable.maxObjectNumber = Math.Max(document.irefTable.maxObjectNumber, iref.ObjectNumber);
        }
        // Encrypt all objects
        if (xrefEncrypt != null)
        {
          document.SecurityHandler.EncryptDocument();
        }

        // Fix references of trailer values and then objects and irefs are consistent.
        document.trailer.Finish();

#if DEBUG_
        // Some tests...
        PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer);
        reachables.GetType();
        reachables = document.xrefTable.AllXRefs;
        document.xrefTable.CheckConsistence();
#endif

        if (openmode == PdfDocumentOpenMode.Modify)
        {
          // Create new or change existing document IDs
          if (document.Internals.SecondDocumentID == "")
            document.trailer.CreateNewDocumentIDs();
          else
          {
            byte[] agTemp = Guid.NewGuid().ToByteArray();
            document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length);
          }

          // Change modification date
          document.Info.ModificationDate = DateTime.Now;

          // Remove all unreachable objects
          int removed = document.irefTable.Compact();
          if (removed != 0)
            Debug.WriteLine("Number of deleted unreachable objects: " + removed);

          // Force flattening of page tree
          PdfPages pages = document.Pages;

          //bool b = document.irefTable.Contains(new PdfObjectID(1108));
          //b.GetType();

          document.irefTable.CheckConsistence();
          document.irefTable.Renumber();
          document.irefTable.CheckConsistence();
        }
      }
      finally
      {
        //if (filestream != null)
        //  filestream.Close();
      }
      return document;
    }
Example #3
0
    internal PdfDocument(Lexer lexer)
    {
      //PdfDocument.Gob.AttatchDocument(this.Handle);

      this.creation = DateTime.Now;
      this.state = DocumentState.Imported;

      //this.info = new PdfInfo(this);
      //this.pages = new PdfPages(this);
      //this.fontTable = new PdfFontTable();
      //this.catalog = new PdfCatalog(this);
      ////this.font = new PdfFont();
      //this.objects = new PdfObjectTable(this);
      //this.trailer = new PdfTrailer(this);
      this.irefTable = new PdfReferenceTable(this);
      this.lexer = lexer;
    }
Example #4
0
 public Parser(PdfDocument document, Stream pdf)
 {
   this.document = document;
   this.lexer = new Lexer(pdf);
   this.stack = new ShiftStack();
 }
Example #5
0
        /// <summary>
        /// Opens an existing PDF document.
        /// </summary>
        public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider)
        {
            PdfDocument document;

            try
            {
                Lexer lexer = new Lexer(stream);
                document           = new PdfDocument(lexer);
                document._state   |= DocumentState.Imported;
                document._openMode = openmode;
                document._fileSize = stream.Length;

                // Get file version.
                byte[] header = new byte[1024];
                stream.Position = 0;
                stream.Read(header, 0, 1024);
                document._version = GetPdfFileVersion(header);
                if (document._version == 0)
                {
                    throw new InvalidOperationException(PSSR.InvalidPdf);
                }

                document._irefTable.IsUnderConstruction = true;
                Parser parser = new Parser(document);
                // Read all trailers or cross-reference streams, but no objects.
                document._trailer = parser.ReadTrailer();

                Debug.Assert(document._irefTable.IsUnderConstruction);
                document._irefTable.IsUnderConstruction = false;

                // Is document encrypted?
                PdfReference xrefEncrypt = document._trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference;
                if (xrefEncrypt != null)
                {
                    //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false);
                    PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false, false);

                    encrypt.Reference = xrefEncrypt;
                    xrefEncrypt.Value = encrypt;
                    PdfStandardSecurityHandler securityHandler = document.SecurityHandler;
TryAgain:
                    PasswordValidity validity = securityHandler.ValidatePassword(password);
                    if (validity == PasswordValidity.Invalid)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                            {
                                return(null);
                            }
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                        {
                            if (password == null)
                            {
                                throw new PdfReaderException(PSSR.PasswordRequired);
                            }
                            else
                            {
                                throw new PdfReaderException(PSSR.InvalidPassword);
                            }
                        }
                    }
                    else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                            {
                                return(null);
                            }
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                        {
                            throw new PdfReaderException(PSSR.OwnerPasswordRequired);
                        }
                    }
                }
                else
                {
                    if (password != null)
                    {
                        // Password specified but document is not encrypted.
                        // ignore
                    }
                }

                PdfReference[] irefs2 = document._irefTable.AllReferences;
                int            count2 = irefs2.Length;

                // 3rd: Create iRefs for all compressed objects.
                Dictionary <int, object> objectStreams = new Dictionary <int, object>();
                for (int idx = 0; idx < count2; idx++)
                {
                    PdfReference            iref       = irefs2[idx];
                    PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
                    if (xrefStream != null)
                    {
                        for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
                        {
                            PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
                            // Is type xref to compressed object?
                            if (item.Type == 2)
                            {
                                //PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3);
                                //document._irefTable.Add(irefNew);
                                int objectNumber = (int)item.Field2;
                                if (!objectStreams.ContainsKey(objectNumber))
                                {
                                    objectStreams.Add(objectNumber, null);
                                    PdfObjectID objectID = new PdfObjectID((int)item.Field2);
                                    parser.ReadIRefsFromCompressedObject(objectID);
                                }
                            }
                        }
                    }
                }

                // 4th: Read compressed objects.
                for (int idx = 0; idx < count2; idx++)
                {
                    PdfReference            iref       = irefs2[idx];
                    PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
                    if (xrefStream != null)
                    {
                        for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
                        {
                            PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
                            // Is type xref to compressed object?
                            if (item.Type == 2)
                            {
                                PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2),
                                                                                   (int)item.Field3);
                                Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                                //document._irefTable.Add(irefNew);
                            }
                        }
                    }
                }


                PdfReference[] irefs = document._irefTable.AllReferences;
                int            count = irefs.Length;

                // Read all indirect objects.
                for (int idx = 0; idx < count; idx++)
                {
                    PdfReference iref = irefs[idx];
                    if (iref.Value == null)
                    {
#if DEBUG_
                        if (iref.ObjectNumber == 1074)
                        {
                            iref.GetType();
                        }
#endif
                        try
                        {
                            Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                            PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false, false);
                            Debug.Assert(pdfObject.Reference == iref);
                            pdfObject.Reference = iref;
                            Debug.Assert(pdfObject.Reference.Value != null, "Something went wrong.");
                        }
                        catch (Exception ex)
                        {
                            Debug.WriteLine(ex.Message);
                            // 4STLA rethrow exception to notify caller.
                            throw;
                        }
                    }
                    else
                    {
                        Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                        //iref.GetType();
                    }
                    // Set maximum object number.
                    document._irefTable._maxObjectNumber = Math.Max(document._irefTable._maxObjectNumber,
                                                                    iref.ObjectNumber);
                }

                // Encrypt all objects.
                if (xrefEncrypt != null)
                {
                    document.SecurityHandler.EncryptDocument();
                }

                // Fix references of trailer values and then objects and irefs are consistent.
                document._trailer.Finish();

#if DEBUG_
                // Some tests...
                PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer);
                reachables.GetType();
                reachables = document.xrefTable.AllXRefs;
                document.xrefTable.CheckConsistence();
#endif

                if (openmode == PdfDocumentOpenMode.Modify)
                {
                    // Create new or change existing document IDs.
                    if (document.Internals.SecondDocumentID == "")
                    {
                        document._trailer.CreateNewDocumentIDs();
                    }
                    else
                    {
                        byte[] agTemp = Guid.NewGuid().ToByteArray();
                        document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length);
                    }

                    // Change modification date
                    document.Info.ModificationDate = DateTime.Now;

                    // Remove all unreachable objects
                    int removed = document._irefTable.Compact();
                    if (removed != 0)
                    {
                        Debug.WriteLine("Number of deleted unreachable objects: " + removed);
                    }

                    // Force flattening of page tree
                    PdfPages pages = document.Pages;
                    Debug.Assert(pages != null);

                    //bool b = document.irefTable.Contains(new PdfObjectID(1108));
                    //b.GetType();

                    document._irefTable.CheckConsistence();
                    document._irefTable.Renumber();
                    document._irefTable.CheckConsistence();
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
                throw;
            }
            return(document);
        }
Example #6
0
        /// <summary>
        /// Opens an existing PDF document.
        /// </summary>
        public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider)
        {
            PdfDocument document;
            try
            {
                Lexer lexer = new Lexer(stream);
                document = new PdfDocument(lexer);
                document._state |= DocumentState.Imported;
                document._openMode = openmode;
                document._fileSize = stream.Length;

                // Get file version.
                byte[] header = new byte[1024];
                stream.Position = 0;
                stream.Read(header, 0, 1024);
                document._version = GetPdfFileVersion(header);
                if (document._version == 0)
                    throw new InvalidOperationException(PSSR.InvalidPdf);

                document._irefTable.IsUnderConstruction = true;
                Parser parser = new Parser(document);
                // Read all trailers or cross-reference streams, but no objects.
                document._trailer = parser.ReadTrailer();

                Debug.Assert(document._irefTable.IsUnderConstruction);
                document._irefTable.IsUnderConstruction = false;

                // Is document encrypted?
                PdfReference xrefEncrypt = document._trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference;
                if (xrefEncrypt != null)
                {
                    //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false);
                    PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false, false);

                    encrypt.Reference = xrefEncrypt;
                    xrefEncrypt.Value = encrypt;
                    PdfStandardSecurityHandler securityHandler = document.SecurityHandler;
                    TryAgain:
                    PasswordValidity validity = securityHandler.ValidatePassword(password);
                    if (validity == PasswordValidity.Invalid)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                                return null;
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                        {
                            if (password == null)
                                throw new PdfReaderException(PSSR.PasswordRequired);
                            else
                                throw new PdfReaderException(PSSR.InvalidPassword);
                        }
                    }
                    else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                                return null;
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                            throw new PdfReaderException(PSSR.OwnerPasswordRequired);
                    }
                }
                else
                {
                    if (password != null)
                    {
                        // Password specified but document is not encrypted.
                        // ignore
                    }
                }

                PdfReference[] irefs2 = document._irefTable.AllReferences;
                int count2 = irefs2.Length;

                // 3rd: Create iRefs for all compressed objects.
                Dictionary<int, object> objectStreams = new Dictionary<int, object>();
                for (int idx = 0; idx < count2; idx++)
                {
                    PdfReference iref = irefs2[idx];
                    PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
                    if (xrefStream != null)
                    {
                        for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
                        {
                            PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
                            // Is type xref to compressed object?
                            if (item.Type == 2)
                            {
                                //PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2), (int)item.Field3);
                                //document._irefTable.Add(irefNew);
                                int objectNumber = (int)item.Field2;
                                if (!objectStreams.ContainsKey(objectNumber))
                                {
                                    objectStreams.Add(objectNumber, null);
                                    PdfObjectID objectID = new PdfObjectID((int)item.Field2);
                                    parser.ReadIRefsFromCompressedObject(objectID);
                                }
                            }
                        }
                    }
                }

                // 4th: Read compressed objects.
                for (int idx = 0; idx < count2; idx++)
                {
                    PdfReference iref = irefs2[idx];
                    PdfCrossReferenceStream xrefStream = iref.Value as PdfCrossReferenceStream;
                    if (xrefStream != null)
                    {
                        for (int idx2 = 0; idx2 < xrefStream.Entries.Count; idx2++)
                        {
                            PdfCrossReferenceStream.CrossReferenceStreamEntry item = xrefStream.Entries[idx2];
                            // Is type xref to compressed object?
                            if (item.Type == 2)
                            {
                                PdfReference irefNew = parser.ReadCompressedObject(new PdfObjectID((int)item.Field2),
                                    (int)item.Field3);
                                Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                                //document._irefTable.Add(irefNew);
                            }
                        }
                    }
                }


                PdfReference[] irefs = document._irefTable.AllReferences;
                int count = irefs.Length;

                // Read all indirect objects.
                for (int idx = 0; idx < count; idx++)
                {
                    PdfReference iref = irefs[idx];
                    if (iref.Value == null)
                    {
#if DEBUG_
                        if (iref.ObjectNumber == 1074)
                            iref.GetType();
#endif
                        try
                        {
                            Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                            PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false, false);
                            Debug.Assert(pdfObject.Reference == iref);
                            pdfObject.Reference = iref;
                            Debug.Assert(pdfObject.Reference.Value != null, "Something went wrong.");
                        }
                        catch (Exception ex)
                        {
                            Debug.WriteLine(ex.Message);
                            // 4STLA rethrow exception to notify caller.
                            throw;
                        }
                    }
                    else
                    {
                        Debug.Assert(document._irefTable.Contains(iref.ObjectID));
                        //iref.GetType();
                    }
                    // Set maximum object number.
                    document._irefTable._maxObjectNumber = Math.Max(document._irefTable._maxObjectNumber,
                        iref.ObjectNumber);
                }

                // Encrypt all objects.
                if (xrefEncrypt != null)
                {
                    document.SecurityHandler.EncryptDocument();
                }

                // Fix references of trailer values and then objects and irefs are consistent.
                document._trailer.Finish();

#if DEBUG_
    // Some tests...
                PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer);
                reachables.GetType();
                reachables = document.xrefTable.AllXRefs;
                document.xrefTable.CheckConsistence();
#endif

                if (openmode == PdfDocumentOpenMode.Modify)
                {
                    // Create new or change existing document IDs.
                    if (document.Internals.SecondDocumentID == "")
                        document._trailer.CreateNewDocumentIDs();
                    else
                    {
                        byte[] agTemp = Guid.NewGuid().ToByteArray();
                        document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length);
                    }

                    // Change modification date
                    document.Info.ModificationDate = DateTime.Now;

                    // Remove all unreachable objects
                    int removed = document._irefTable.Compact();
                    if (removed != 0)
                        Debug.WriteLine("Number of deleted unreachable objects: " + removed);

                    // Force flattening of page tree
                    PdfPages pages = document.Pages;
                    Debug.Assert(pages != null);

                    //bool b = document.irefTable.Contains(new PdfObjectID(1108));
                    //b.GetType();

                    document._irefTable.CheckConsistence();
                    document._irefTable.Renumber();
                    document._irefTable.CheckConsistence();
                }
            }
            catch (Exception ex)
            {
                Debug.WriteLine(ex.Message);
                throw;
            }
            return document;
        }
Example #7
0
        /// <summary>
        /// Opens an existing PDF document.
        /// </summary>
        public static PdfDocument Open(Stream stream, string password, PdfDocumentOpenMode openmode, PdfPasswordProvider passwordProvider)
        {
            PdfDocument document = null;

            try
            {
                Lexer lexer = new Lexer(stream);
                document          = new PdfDocument(lexer);
                document.state   |= DocumentState.Imported;
                document.openMode = openmode;
                document.fileSize = stream.Length;

                // Get file version
                byte[] header = new byte[1024];
                stream.Position = 0;
                stream.Read(header, 0, 1024);
                document.version = GetPdfFileVersion(header);
                if (document.version == 0)
                {
                    throw new InvalidOperationException(PSSR.InvalidPdf);
                }

                // Read all trailers
                document.irefTable.IsUnderConstruction = true;
                Parser parser = new Parser(document);
                document.trailer = parser.ReadTrailer();

                document.irefTable.IsUnderConstruction = false;

                // Is document encrypted?
                PdfReference xrefEncrypt = document.trailer.Elements[PdfTrailer.Keys.Encrypt] as PdfReference;
                if (xrefEncrypt != null)
                {
                    //xrefEncrypt.Value = parser.ReadObject(null, xrefEncrypt.ObjectID, false);
                    PdfObject encrypt = parser.ReadObject(null, xrefEncrypt.ObjectID, false);

                    encrypt.Reference = xrefEncrypt;
                    xrefEncrypt.Value = encrypt;
                    PdfStandardSecurityHandler securityHandler = document.SecurityHandler;
TryAgain:
                    PasswordValidity validity = securityHandler.ValidatePassword(password);
                    if (validity == PasswordValidity.Invalid)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                            {
                                return(null);
                            }
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                        {
                            if (password == null)
                            {
                                throw new PdfReaderException(PSSR.PasswordRequired);
                            }
                            else
                            {
                                throw new PdfReaderException(PSSR.InvalidPassword);
                            }
                        }
                    }
                    else if (validity == PasswordValidity.UserPassword && openmode == PdfDocumentOpenMode.Modify)
                    {
                        if (passwordProvider != null)
                        {
                            PdfPasswordProviderArgs args = new PdfPasswordProviderArgs();
                            passwordProvider(args);
                            if (args.Abort)
                            {
                                return(null);
                            }
                            password = args.Password;
                            goto TryAgain;
                        }
                        else
                        {
                            throw new PdfReaderException(PSSR.OwnerPasswordRequired);
                        }
                    }
                }
                else
                {
                    if (password != null)
                    {
                        // Password specified but document is not encrypted.
                        // ignore
                    }
                }

                PdfReference[] irefs = document.irefTable.AllReferences;
                int            count = irefs.Length;

                // Read all indirect objects
                for (int idx = 0; idx < count; idx++)
                {
                    PdfReference iref = irefs[idx];
                    if (iref.Value == null)
                    {
                        try
                        {
                            Debug.Assert(document.irefTable.Contains(iref.ObjectID));
                            PdfObject pdfObject = parser.ReadObject(null, iref.ObjectID, false);
                            Debug.Assert(pdfObject.Reference == iref);
                            pdfObject.Reference = iref;
                            Debug.Assert(pdfObject.Reference.Value != null, "something got wrong");
                        }
                        catch (Exception ex)
                        {
                            Debug.WriteLine(ex.Message);
                        }
                    }
                    else
                    {
                        Debug.Assert(document.irefTable.Contains(iref.ObjectID));
                        iref.GetType();
                    }
                    // Set maximum object number
                    document.irefTable.maxObjectNumber = Math.Max(document.irefTable.maxObjectNumber, iref.ObjectNumber);
                }
                // Encrypt all objects
                if (xrefEncrypt != null)
                {
                    document.SecurityHandler.EncryptDocument();
                }

                // Fix references of trailer values and then objects and irefs are consistent.
                document.trailer.Finish();

#if DEBUG_
                // Some tests...
                PdfReference[] reachables = document.xrefTable.TransitiveClosure(document.trailer);
                reachables.GetType();
                reachables = document.xrefTable.AllXRefs;
                document.xrefTable.CheckConsistence();
#endif

                if (openmode == PdfDocumentOpenMode.Modify)
                {
                    // Create new or change existing document IDs
                    if (document.Internals.SecondDocumentID == "")
                    {
                        document.trailer.CreateNewDocumentIDs();
                    }
                    else
                    {
                        byte[] agTemp = Guid.NewGuid().ToByteArray();
                        document.Internals.SecondDocumentID = PdfEncoders.RawEncoding.GetString(agTemp, 0, agTemp.Length);
                    }

                    // Change modification date
                    document.Info.ModificationDate = DateTime.Now;

                    // Remove all unreachable objects
                    int removed = document.irefTable.Compact();
                    if (removed != 0)
                    {
                        Debug.WriteLine("Number of deleted unreachable objects: " + removed);
                    }

                    // Force flattening of page tree
                    PdfPages pages = document.Pages;

                    //bool b = document.irefTable.Contains(new PdfObjectID(1108));
                    //b.GetType();

                    document.irefTable.CheckConsistence();
                    document.irefTable.Renumber();
                    document.irefTable.CheckConsistence();
                }
            }
            finally
            {
                //if (filestream != null)
                //  filestream.Close();
            }
            return(document);
        }
Example #8
0
 public Parser(PdfDocument document)
 {
   this.document = document;
   this.lexer = document.lexer;
   this.stack = new ShiftStack();
 }
Example #9
0
 public Parser(PdfDocument document, Stream pdf)
 {
   this.document = document;
   this.lexer = new Lexer(pdf);
   this.stack = new ShiftStack();
 }
Example #10
0
 public Parser(PdfDocument document, Stream pdf)
 {
     _document = document;
     _lexer = new Lexer(pdf);
     _stack = new ShiftStack();
 }
Example #11
0
        internal PdfDocument(Lexer lexer)
        {
            //PdfDocument.Gob.AttatchDocument(Handle);

            _creation = DateTime.Now;
            _state = DocumentState.Imported;

            //_info = new PdfInfo(this);
            //_pages = new PdfPages(this);
            //_fontTable = new PdfFontTable();
            //_catalog = new PdfCatalog(this);
            ////_font = new PdfFont();
            //_objects = new PdfObjectTable(this);
            //_trailer = new PdfTrailer(this);
            _irefTable = new PdfCrossReferenceTable(this);
            _lexer = lexer;
        }