C# PdfDictionary类代码示例

 private ImageRenderInfo(GraphicsState gs, InlineImageInfo inlineImageInfo, PdfDictionary colorSpaceDictionary)
 {
     this.gs = gs;
     this.refi = null;
     this.inlineImageInfo = inlineImageInfo;
     this.colorSpaceDictionary = colorSpaceDictionary;
 }

        private PdfStream(PdfDictionary dictionary, PdfData data)
            : base(PdfObjectType.Stream)
        {
            IsContainer = true;
            StreamDictionary = dictionary;
            Data = data;

            //IPdfObject filter = StreamDictionary["Filter"];
            //if (filter.Text == "FlateDecode")
            //{
            //    ZInputStream zin = new ZInputStream(new MemoryStream(Data));
            //    //zin.
            //    int r;
            //    IList<char> output = new List<char>(data.Length*10);
            //    while ((r = zin.Read()) != -1)
            //    {
            //        output.Add((char)r);
            //    }
            //    char[] decompressed = output.ToArray();
            //    String test = new String(decompressed);
            //    zin.Close();
            //}
            //else if (filter.Text == "DCTDecode")
            //{
            //    // JPEG image
            //}
            //else
            //    throw new NotImplementedException("Implement Filter");
        }

        /**
         * Creates an object that can inform you about the type of signature
         * in a signature dictionary as well as some of the permissions
         * defined by the signature.
         */
        public SignaturePermissions(PdfDictionary sigDict, SignaturePermissions previous)
        {
            if (previous != null) {
                annotationsAllowed &= previous.AnnotationsAllowed;
                fillInAllowed &= previous.FillInAllowed;
                fieldLocks.AddRange(previous.FieldLocks);
            }
            PdfArray reference = sigDict.GetAsArray(PdfName.REFERENCE);
            if (reference != null) {
                for (int i = 0; i < reference.Size; i++) {
                    PdfDictionary dict = reference.GetAsDict(i);
                    PdfDictionary parameters = dict.GetAsDict(PdfName.TRANSFORMPARAMS);
                    if (PdfName.DOCMDP.Equals(dict.GetAsName(PdfName.TRANSFORMMETHOD)))
                        certification = true;

                    PdfName action = parameters.GetAsName(PdfName.ACTION);
                    if (action != null)
                        fieldLocks.Add(new FieldLock(action, parameters.GetAsArray(PdfName.FIELDS)));

                    PdfNumber p = parameters.GetAsNumber(PdfName.P);
                    if (p == null)
                        continue;
                    switch (p.IntValue) {
                    case 1:
                        fillInAllowed = false;
                        break;
                    case 2:
                        annotationsAllowed = false;
                        break;
                    }
                }
            }
        }

   public PdfStream(
 PdfDictionary header
 )
       : this(header,
   new bytes.Buffer())
   {
   }

 /**
  * Shows the detail of a dictionary.
  * @param dic   the dictionary of which you want the detail
  * @param depth the depth of the current dictionary (for nested dictionaries)
  * @return  a String representation of the dictionary
  */
 public static  String GetDictionaryDetail(PdfDictionary dic, int depth){
     StringBuilder builder = new StringBuilder();
     builder.Append('(');
     IList<PdfName> subDictionaries = new List<PdfName>();
     foreach (PdfName key in dic.Keys) {
         PdfObject val = dic.GetDirectObject(key);
         if (val.IsDictionary())
             subDictionaries.Add(key);
         builder.Append(key);
         builder.Append('=');
         builder.Append(val);
         builder.Append(", ");
     }
     builder.Length = builder.Length-2;
     builder.Append(')');
     foreach (PdfName pdfSubDictionaryName in subDictionaries) {
         builder.Append('\n');
         for (int i = 0; i < depth+1; i++){
             builder.Append('\t');
         }
         builder.Append("Subdictionary ");
         builder.Append(pdfSubDictionaryName);
         builder.Append(" = ");
         builder.Append(GetDictionaryDetail(dic.GetAsDict(pdfSubDictionaryName), depth+1));
     }
     return builder.ToString();
 }

        /**
          <summary>Loads the encoding differences into the given collection.</summary>
          <param name="encodingDictionary">Encoding dictionary.</param>
          <param name="codes">Encoding to alter applying differences.</param>
        */
        protected void LoadEncodingDifferences(
      PdfDictionary encodingDictionary,
      IDictionary<ByteArray,int> codes
      )
        {
            PdfArray differenceObjects = (PdfArray)encodingDictionary.Resolve(PdfName.Differences);
              if(differenceObjects == null)
            return;

              /*
            NOTE: Each code is the first index in a sequence of character codes to be changed.
            The first character name after the code becomes the name corresponding to that code.
            Subsequent names replace consecutive code indices until the next code appears
            in the array or the array ends.
              */
              byte[] charCodeData = new byte[1];
              foreach(PdfDirectObject differenceObject in differenceObjects)
              {
            if(differenceObject is PdfInteger)
            {charCodeData[0] = (byte)(((int)((PdfInteger)differenceObject).Value) & 0xFF);}
            else // NOTE: MUST be PdfName.
            {
              ByteArray charCode = new ByteArray(charCodeData);
              string charName = (string)((PdfName)differenceObject).Value;
              if(charName.Equals(".notdef"))
              {codes.Remove(charCode);}
              else
              {
            int? code = GlyphMapping.NameToCode(charName);
            codes[charCode] = (code ?? charCodeData[0]);
              }
              charCodeData[0]++;
            }
              }
        }

        public File(
      )
        {
            Initialize();

              version = VersionEnum.PDF14.GetVersion();
              trailer = PrepareTrailer(new PdfDictionary());
              indirectObjects = new IndirectObjects(this, null);
              document = new Document(this);
        }

 /**
  * Creates a StructureObject for an OBJR dictionary.
  * @param structElem	the parent structure element
  * @param ref			the reference of the parent structure element
  * @param dict			the object reference dictionary
  */
 public StructureObject(PdfDictionary structElem, PdfIndirectReference refa, PdfDictionary dict) {
     this.structElem = structElem;
     this.refa = refa;
     this.obj = dict.GetDirectObject(PdfName.OBJ);
     this.objref = dict.GetAsIndirectObject(PdfName.OBJ);
     this.structParent = ((PdfDictionary) obj).GetAsNumber(PdfName.STRUCTPARENT).IntValue;
     PdfIndirectReference pg = dict.GetAsIndirectObject(PdfName.PG);
     if (pg == null)
         pg = structElem.GetAsIndirectObject(PdfName.PG);
     this.pageref = pg.Number;
 }

 public override byte[] Decode(
     byte[] data,
     int offset,
     int length,
     PdfDictionary parameters
     )
 {
     MemoryStream outputStream = new MemoryStream();
       MemoryStream inputStream = new MemoryStream(data, offset, length);
       DeflateStream inputFilter = new DeflateStream(inputStream, CompressionMode.Decompress);
       inputStream.Position = 2; // Skips zlib's 2-byte header [RFC 1950] [FIX:0.0.8:JCT].
       Transform(inputFilter,outputStream);
       return DecodePredictor(outputStream.ToArray(), parameters);
 }

 protected override void CheckEmbeddedFile(PdfDictionary embeddedFile)
 {
     PdfObject _params = GetDirectObject(embeddedFile.Get(PdfName.PARAMS));
     if (_params == null) {
         throw new PdfAConformanceException(embeddedFile,
             MessageLocalization.GetComposedMessage("embedded.file.shall.contain.valid.params.key"));
     } else if (_params.IsDictionary()) {
         PdfObject modDate = ((PdfDictionary) _params).Get(PdfName.MODDATE);
         if (modDate == null || !(modDate is PdfString)) {
             throw new PdfAConformanceException(embeddedFile,
                 MessageLocalization.GetComposedMessage("embedded.file.shall.contain.params.key.with.valid.moddate.key"));
         }
     }
 }

 public override byte[] Encode(
     byte[] data,
     int offset,
     int length,
     PdfDictionary parameters
     )
 {
     MemoryStream inputStream = new MemoryStream(data, offset, length);
       MemoryStream outputStream = new MemoryStream();
       DeflateStream outputFilter = new DeflateStream(outputStream, CompressionMode.Compress, true);
       // Add zlib's 2-byte header [RFC 1950] [FIX:0.0.8:JCT]!
       outputStream.WriteByte(0x78); // CMF = {CINFO (bits 7-4) = 7; CM (bits 3-0) = 8} = 0x78.
       outputStream.WriteByte(0xDA); // FLG = {FLEVEL (bits 7-6) = 3; FDICT (bit 5) = 0; FCHECK (bits 4-0) = {31 - ((CMF * 256 + FLG - FCHECK) Mod 31)} = 26} = 0xDA.
       Transform(inputStream, outputFilter);
       return outputStream.ToArray();
 }

 public PdfDictionary GetEncrypt(PdfObjectId objectId)
 {
     PdfDictionary encrypt = new PdfDictionary(objectId);
     encrypt[PdfName.Names.Filter] = PdfName.Names.Standard;
     encrypt[PdfName.Names.V] = new PdfNumeric(1);
     encrypt[PdfName.Names.Length] = new PdfNumeric(40);
     encrypt[PdfName.Names.R] = new PdfNumeric(2);
     PdfString o = new PdfString(ownerEntry);
     o.NeverEncrypt = true;
     encrypt[PdfName.Names.O] = o;
     PdfString u = new PdfString(userEntry);
     u.NeverEncrypt = true;
     encrypt[PdfName.Names.U] = u;
     encrypt[PdfName.Names.P] = new PdfNumeric(permissions);
     return encrypt;
 }

        /// <summary>
        /// Initializes a new instance from an existing dictionary. Used for object type transformation.
        /// </summary>
        internal PdfObjectStream(PdfDictionary dict)
            : base(dict)
        {
            int n = Elements.GetInteger(Keys.N);
            int first = Elements.GetInteger(Keys.First);
            Stream.TryUnfilter();

            Parser parser = new Parser(null, new MemoryStream(Stream.Value));
            _header = parser.ReadObjectStreamHeader(n, first);

#if DEBUG && CORE
            if (Internal.PdfDiagnostics.TraceObjectStreams)
            {
                Debug.WriteLine(String.Format("PdfObjectStream(document) created. Header item count: {0}", _header.GetLength(0)));
            }
#endif
        }

        public PdfCIDFont(PdfDocument document, PdfFontDescriptor fontDescriptor, byte[] fontData)
            : base(document)
        {
            Elements.SetName(Keys.Type, "/Font");
            Elements.SetName(Keys.Subtype, "/CIDFontType2");
            PdfDictionary cid = new PdfDictionary();
            cid.Elements.SetString("/Ordering", "Identity");
            cid.Elements.SetString("/Registry", "Adobe");
            cid.Elements.SetInteger("/Supplement", 0);
            Elements.SetValue(Keys.CIDSystemInfo, cid);

            FontDescriptor = fontDescriptor;
            // ReSharper disable once DoNotCallOverridableMethodsInConstructor
            Owner._irefTable.Add(fontDescriptor);
            Elements[Keys.FontDescriptor] = fontDescriptor.Reference;

            FontEncoding = PdfFontEncoding.Unicode;
        }

        public static PdfStream Parse(PdfDictionary dictionary, Lexical.ILexer lexer)
        {
            lexer.Expects("stream");
            char eol = lexer.ReadChar();
            if (eol == '\r')
                eol = lexer.ReadChar();
            if (eol != '\n')
                throw new Exception(@"Parser error: stream needs to be followed by either \r\n or \n alone");

            if (dictionary == null)
                throw new Exception("Parser error: stream needs a dictionary");

            IPdfObject lengthObject = dictionary["Length"];
            if (lengthObject == null)
                throw new Exception("Parser error: stream dictionary requires a Length entry");

            int length = 0;
            if (lengthObject is PdfIndirectReference)
            {
                PdfIndirectReference reference = lengthObject as PdfIndirectReference;

                PdfIndirectObject lenobj = lexer.IndirectReferenceResolver
                    .GetObject(reference.ObjectNumber, reference.GenerationNumber);

                PdfNumeric len = lenobj.Object as PdfNumeric;
                length = int.Parse(len.ToString());
            }
            else
            {
                length = int.Parse(lengthObject.ToString());
            }

            PdfData data = PdfData.Parse(lexer, length);
            lexer.Expects("endstream");

            return new PdfStream(dictionary, data);
        }