/// <summary>
        /// Generates an escher record including the any children contained under that record.
        /// An exception is thrown if the record could not be generated.
        /// </summary>
        /// <param name="data">The byte array containing the records</param>
        /// <param name="offset">The starting offset into the byte array</param>
        /// <returns>The generated escher record</returns>
        public virtual EscherRecord CreateRecord(byte[] data, int offset)
        {
            EscherRecord.EscherRecordHeader header = EscherRecord.EscherRecordHeader.ReadHeader(data, offset);

            // Options of 0x000F means container record
            // However, EscherTextboxRecord are containers of records for the
            //  host application, not of other Escher records, so treat them
            //  differently
            if ((header.Options & (short)0x000F) == (short)0x000F
                 && header.RecordId != EscherTextboxRecord.RECORD_ID)
            {
                EscherContainerRecord r = new EscherContainerRecord();
                r.RecordId = header.RecordId;
                r.Options = header.Options;
                return r;
            }
            if (header.RecordId >= EscherBlipRecord.RECORD_ID_START && header.RecordId <= EscherBlipRecord.RECORD_ID_END)
            {
                EscherBlipRecord r;
                if (header.RecordId == EscherBitmapBlip.RECORD_ID_DIB ||
                        header.RecordId == EscherBitmapBlip.RECORD_ID_JPEG ||
                        header.RecordId == EscherBitmapBlip.RECORD_ID_PNG)
                {
                    r = new EscherBitmapBlip();
                }
                else if (header.RecordId == EscherMetafileBlip.RECORD_ID_EMF ||
                        header.RecordId == EscherMetafileBlip.RECORD_ID_WMF ||
                        header.RecordId == EscherMetafileBlip.RECORD_ID_PICT)
                {
                    r = new EscherMetafileBlip();
                }
                else
                {
                    r = new EscherBlipRecord();
                }
                r.RecordId = header.RecordId;
                r.Options = header.Options;
                return r;
            }

            //ConstructorInfo recordConstructor = (ConstructorInfo) recordsMap[header.RecordId];
            ConstructorInfo recordConstructor = null;
            if (recordsMap.ContainsKey(header.RecordId))
                recordConstructor = recordsMap[header.RecordId];

            EscherRecord escherRecord = null;
            if (recordConstructor == null)
            {
                return new UnknownEscherRecord();
            }

            try
            {
                escherRecord = (EscherRecord)recordConstructor.Invoke(new object[] { });
                //escherRecord = (EscherRecord)Activator.CreateInstance(recordConstructor);
            }
            catch (Exception)
            {
                return new UnknownEscherRecord();
            }
            escherRecord.RecordId = header.RecordId;
            escherRecord.Options = header.Options;
            return escherRecord;

        }
예제 #2
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        /// <summary>
        /// This method deSerializes the record from a byte array.
        /// </summary>
        /// <param name="data">The byte array containing the escher record information</param>
        /// <param name="offset">The starting offset into data</param>
        /// <param name="recordFactory">May be null since this is not a container record.</param>
        /// <returns>The number of bytes Read from the byte array.</returns>
        public override int FillFields(byte[] data, int offset,
                                  EscherRecordFactory recordFactory
                                  )
        {
            int bytesRemaining = ReadHeader(data, offset);
            int pos = offset + 8;
            field_1_blipTypeWin32 = data[pos];
            field_2_blipTypeMacOS = data[pos + 1];
            field_3_uid = new byte[16];
            Array.Copy(data, pos + 2, field_3_uid, 0, 16);
            field_4_tag = LittleEndian.GetShort(data, pos + 18);
            field_5_size = LittleEndian.GetInt(data, pos + 20);
            field_6_ref = LittleEndian.GetInt(data, pos + 24);
            field_7_offset = LittleEndian.GetInt(data, pos + 28);
            field_8_usage = data[pos + 32];
            field_9_name = data[pos + 33];
            field_10_unused2 = data[pos + 34];
            field_11_unused3 = data[pos + 35];
            bytesRemaining -= 36;
            int bytesRead = 0;
            if (bytesRemaining > 0)
            {
                field_12_blipRecord = (EscherBlipRecord)recordFactory.CreateRecord(data, pos + 36);
                bytesRead = field_12_blipRecord.FillFields(data, pos + 36, recordFactory);
            }
            pos += 36 + bytesRead;
            bytesRemaining -= bytesRead;

            _remainingData = new byte[bytesRemaining];
            Array.Copy(data, pos, _remainingData, 0, bytesRemaining);
            return bytesRemaining + 8 + 36 + (field_12_blipRecord == null ? 0 : field_12_blipRecord.RecordSize);

        }
예제 #3
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 /// <summary>
 /// Constructs a picture object.
 /// </summary>
 /// <param name="blip">the underlying blip record containing the bitmap data.</param>
 public HSSFPictureData(EscherBlipRecord blip)
 {
     this.blip = blip;
 }