/// <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;
}
/// <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);
}
/// <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;
}