Ejemplo n.º 1
0
        public static PDFStream MakeStream(PDFDictionary StreamDictionary, byte[] Data, int StartingIndex, out int EndingIndex)
        {
            int TokEnd;

            int StreamLength = 0;

            if (StreamDictionary.ContainsKey("Length"))
            {
                StreamLength = (int)(Decimal.Parse(StreamDictionary["Length"].Description));
            }
            else
            {
                StreamLength = PDF.FirstOccurance(Data, Encoding.UTF8.GetBytes("endstream"), StartingIndex);
            }

            EndingIndex = StartingIndex;
            if ("stream".Equals(PDFObjectParser.GetTokenString(Data, EndingIndex, out _, out TokEnd)))
            {
                if ((StreamLength > 0) && (Data.Length >= TokEnd + 1 + StreamLength))
                {
                    byte[] StreamBytes = new byte[StreamLength];
                    Array.Copy(Data, TokEnd + 1, StreamBytes, 0, StreamLength);
                    EndingIndex = TokEnd + 1 + StreamLength;
                    if (!"endstream".Equals(PDFObjectParser.GetTokenString(Data, EndingIndex, out _, out EndingIndex)))
                    {
                    }   // Error - missing "endstream"
                    return(new PDFStream(StreamDictionary, StreamBytes));
                }
            }

            // Unable to make a stream from this data
            return(null);
        }
Ejemplo n.º 2
0
 public PDFTrailer(PDFDictionary TrailerDictionary, PDFCrossReference CrossReference) : base(TrailerDictionary)
 {
     if (CrossReference == null)
     {
         this.CrossReference = new PDFCrossReference();
     }
     else
     {
         this.CrossReference = CrossReference;
     }
 }
Ejemplo n.º 3
0
        /// <summary>
        /// Read the trailer from a PDF data file
        /// </summary>
        /// <param name="Data">Data to read</param>
        /// <param name="StartIndex">Starting index of where to look for trailer, or -1 to look from end of file (default: -1)</param>
        /// <returns>TRUE if a trailer was successfully read, FALSE otherwise</returns>
        public static PDFTrailer ReadTrailer(byte[] Data, int StartIndex = -1)
        {
            int EndIndex = StartIndex;

            if (EndIndex < 0)
            {
                EndIndex = PDF.FindEOF(Data, Data.Length - 1);
            }

            if (EndIndex < 0)
            {
                return(null);
            }

            int EndOfLineIndex;

            byte[] LineData = PDF.ExtractPreviousPDFLine(Data, EndIndex, out EndIndex, out EndOfLineIndex);
            while (LineData != null)
            {
                if ("trailer".Equals(Encoding.UTF8.GetString(LineData).Trim()))
                {
                    int           TokenStartIndex   = 0;
                    string        Token             = PDFObjectParser.GetTokenString(Data, EndOfLineIndex, out TokenStartIndex, out EndIndex);
                    PDFDictionary TrailerDictionary = (PDFDictionary)PDFDictionary.TryParse(Token, Data, TokenStartIndex, out EndIndex);
                    if (TrailerDictionary != null)
                    {
                        LineData = PDF.ExtractPDFLine(Data, EndIndex, out EndIndex);
                        if ("startxref".Equals(Encoding.UTF8.GetString(LineData).Trim()))
                        {
                            Token = PDFObjectParser.GetTokenString(Data, EndIndex, out TokenStartIndex, out _);
                            PDFNumber         Offset   = (PDFNumber)PDFNumber.TryParse(Token, Data, TokenStartIndex, out EndIndex);
                            PDFCrossReference CrossRef = PDFCrossReference.ReadCrossReference(Data, Offset, out _);
                            return(new PDFTrailer(TrailerDictionary, CrossRef));
                        }
                        else
                        {
                            return(null);
                        }
                    }
                    else
                    {
                        return(null);
                    }
                }
                else
                {
                    LineData = PDF.ExtractPreviousPDFLine(Data, EndIndex, out EndIndex, out EndOfLineIndex);
                }
            }

            return(null);
        }
Ejemplo n.º 4
0
Archivo: PDF.cs Proyecto: jrhay/PKPDF
 /// <summary>
 /// Reads the PDF catalog dictionary, if it can be found
 /// </summary>
 /// <returns>TRUE if catalog dictionary found and loaded successfully, FALSE otherwise</returns>
 private bool ReadPDFCatalog()
 {
     Catalog = null;
     if ((Trailer != null) && (Trailer.Keys.Contains("Root")))
     {
         IPDFObject catalogObject = GetObject(Trailer["Root"]);
         if ((catalogObject != null) && (catalogObject.Type == PDFObjectType.Dictionary))
         {
             Catalog = (PDFDictionary)catalogObject;
         }
     }
     return(Catalog != null);
 }
Ejemplo n.º 5
0
 public PDFStream(PDFDictionary StreamDictionary, byte[] StreamData)
 {
     StreamDictionary["Length"] = new PDFNumber(StreamData.Length);
     this.StreamDictionary      = StreamDictionary;
     this.Data = StreamData;
 }