private static RecordInputStream ConvertToInputStream(DrawingRecord r)
{
byte[] data = r.Serialize();
using (MemoryStream ms = new MemoryStream(data))
{
RecordInputStream rinp = new RecordInputStream(ms);
rinp.NextRecord();
return(rinp);
}
}
public override Object Clone()
{
DrawingRecord rec = new DrawingRecord();
rec.recordData = (byte[])recordData.Clone();// new byte[recordData.Length];
if (contd != null)
{
rec.contd = (byte[])contd.Clone();
}
return(rec);
}
/**
* @return the next available record, or <code>null</code> if
* this pass didn't return a record that's
* suitable for returning (eg was a continue record).
*/
private Record ReadNextRecord()
{
Record record = RecordFactory.CreateSingleRecord(_recStream);
_lastRecordWasEOFLevelZero = false;
if (record is BOFRecord)
{
_bofDepth++;
return(record);
}
if (record is EOFRecord)
{
_bofDepth--;
if (_bofDepth < 1)
{
_lastRecordWasEOFLevelZero = true;
}
return(record);
}
if (record is DBCellRecord)
{
// Not needed by POI. Regenerated from scratch by POI when spreadsheet is written
return(null);
}
if (record is RKRecord)
{
return(RecordFactory.ConvertToNumberRecord((RKRecord)record));
}
if (record is MulRKRecord)
{
Record[] records = RecordFactory.ConvertRKRecords((MulRKRecord)record);
_unreadRecordBuffer = records;
_unreadRecordIndex = 1;
return(records[0]);
}
if (record.Sid == DrawingGroupRecord.sid &&
_lastRecord is DrawingGroupRecord)
{
DrawingGroupRecord lastDGRecord = (DrawingGroupRecord)_lastRecord;
lastDGRecord.Join((AbstractEscherHolderRecord)record);
return(null);
}
if (record.Sid == ContinueRecord.sid)
{
ContinueRecord contRec = (ContinueRecord)record;
if (_lastRecord is ObjRecord || _lastRecord is TextObjectRecord)
{
// Drawing records have a very strange continue behaviour.
//There can actually be OBJ records mixed between the continues.
_lastDrawingRecord.ProcessContinueRecord(contRec.Data);
//we must remember the position of the continue record.
//in the serialization procedure the original structure of records must be preserved
if (_shouldIncludeContinueRecords)
{
return(record);
}
return(null);
}
if (_lastRecord is DrawingGroupRecord)
{
((DrawingGroupRecord)_lastRecord).ProcessContinueRecord(contRec.Data);
return(null);
}
if (_lastRecord is DrawingRecord)
{
((DrawingRecord)_lastRecord).ProcessContinueRecord(contRec.Data);
return(null);
}
if (_lastRecord is UnknownRecord)
{
//Gracefully handle records that we don't know about,
//that happen to be continued
return(record);
}
if (_lastRecord is EOFRecord)
{
// This is really odd, but excel still sometimes
// outPuts a file like this all the same
return(record);
}
//if (_lastRecord is StringRecord)
//{
// ((StringRecord)_lastRecord).ProcessContinueRecord(contRec.Data);
// return null;
//}
throw new RecordFormatException("Unhandled Continue Record");
}
_lastRecord = record;
if (record is DrawingRecord)
{
_lastDrawingRecord = (DrawingRecord)record;
}
return(record);
}
public DrawingRecordForBiffViewer(DrawingRecord r)
: base(ConvertToInputStream(r))
{
ConvertRawBytesToEscherRecords();
}
/**
* Serializes this aggregate to a byte array. Since this Is an aggregate
* record it will effectively Serialize the aggregated records.
*
* @param offset The offset into the start of the array.
* @param data The byte array to Serialize to.
* @return The number of bytes Serialized.
*/
public override int Serialize(int offset, byte [] data)
{
ConvertUserModelToRecords();
// Determine buffer size
IList records = EscherRecords;
int size = GetEscherRecordSize(records);
byte[] buffer = new byte[size];
// Serialize escher records into one big data structure and keep note of ending offsets.
spEndingOffsets = new ArrayList();
shapes = new ArrayList();
int pos = 0;
for (IEnumerator iterator = records.GetEnumerator(); iterator.MoveNext();)
{
EscherRecord e = (EscherRecord)iterator.Current;
pos += e.Serialize(pos, buffer, new SerializationListener(ref spEndingOffsets, ref shapes));
}
// todo: fix this
shapes.Insert(0, null);
spEndingOffsets.Insert(0, null);
// Split escher records into Separate MSODRAWING and OBJ, TXO records. (We don't break on
// the first one because it's the patriach).
pos = offset;
for (int i = 1; i < shapes.Count; i++)
{
int endOffset = (int)spEndingOffsets[i] - 1;
int startOffset;
if (i == 1)
{
startOffset = 0;
}
else
{
startOffset = (int)spEndingOffsets[i - 1];
}
// Create and Write a new MSODRAWING record
DrawingRecord drawing = new DrawingRecord();
byte[] drawingData = new byte[endOffset - startOffset + 1];
Array.Copy(buffer, startOffset, drawingData, 0, drawingData.Length);
drawing.Data = drawingData;
int temp = drawing.Serialize(pos, data);
pos += temp;
// Write the matching OBJ record
Record obj = (Record)shapeToObj[shapes[i]];
temp = obj.Serialize(pos, data);
pos += temp;
}
// Write records that need to be Serialized after all drawing Group records
for (int i = 0; i < tailRec.Count; i++)
{
Record rec = (Record)tailRec[i];
pos += rec.Serialize(pos, data);
}
int bytesWritten = pos - offset;
if (bytesWritten != RecordSize)
{
throw new RecordFormatException(bytesWritten + " bytes written but RecordSize reports " + RecordSize);
}
return(bytesWritten);
}
/**
* Collapses the drawing records into an aggregate.
*/
public static EscherAggregate CreateAggregate(IList records, int locFirstDrawingRecord, DrawingManager2 drawingManager)
{
// Keep track of any shape records Created so we can match them back to the object id's.
// Textbox objects are also treated as shape objects.
IList shapeRecords = new ArrayList();
EscherRecordFactory recordFactory = new CustomEscherRecordFactory(ref shapeRecords);
// Calculate the size of the buffer
EscherAggregate agg = new EscherAggregate(drawingManager);
int loc = locFirstDrawingRecord;
int dataSize = 0;
while (loc + 1 < records.Count &&
GetSid(records, loc) == DrawingRecord.sid &&
IsObjectRecord(records, loc + 1))
{
dataSize += ((DrawingRecord)records[loc]).Data.Length;
loc += 2;
}
// Create one big buffer
byte[] buffer = new byte[dataSize];
int offset = 0;
loc = locFirstDrawingRecord;
while (loc + 1 < records.Count &&
GetSid(records, loc) == DrawingRecord.sid &&
IsObjectRecord(records, loc + 1))
{
DrawingRecord drawingRecord = (DrawingRecord)records[loc];
Array.Copy(drawingRecord.Data, 0, buffer, offset, drawingRecord.Data.Length);
offset += drawingRecord.Data.Length;
loc += 2;
}
// Decode the shapes
// agg.escherRecords = new ArrayList();
int pos = 0;
while (pos < dataSize)
{
EscherRecord r = recordFactory.CreateRecord(buffer, pos);
int bytesRead = r.FillFields(buffer, pos, recordFactory);
agg.AddEscherRecord(r);
pos += bytesRead;
}
// Associate the object records with the shapes
loc = locFirstDrawingRecord;
int shapeIndex = 0;
agg.shapeToObj = new Hashtable();
while (loc + 1 < records.Count &&
GetSid(records, loc) == DrawingRecord.sid &&
IsObjectRecord(records, loc + 1))
{
Record objRecord = (Record)records[loc + 1];
agg.shapeToObj[shapeRecords[shapeIndex++]] = objRecord;
loc += 2;
}
return(agg);
}
