public EscherAggregate(DrawingManager2 drawingManager)
{
this.drawingManager = drawingManager;
}
/**
* 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;
}
/**
* Finds the DrawingRecord for our sheet, and
* attaches it to the DrawingManager (which knows about
* the overall DrawingGroup for our workbook).
* If requested, will Create a new DrawRecord
* if none currently exist
* @param drawingManager The DrawingManager2 for our workbook
* @param CreateIfMissing Should one be Created if missing?
*/
public int AggregateDrawingRecords(DrawingManager2 drawingManager, bool CreateIfMissing)
{
int loc = FindFirstRecordLocBySid(DrawingRecord.sid);
bool noDrawingRecordsFound = (loc == -1);
if (noDrawingRecordsFound)
{
if (!CreateIfMissing)
{
// None found, and not allowed to Add in
return -1;
}
EscherAggregate aggregate = new EscherAggregate(drawingManager);
loc = FindFirstRecordLocBySid(EscherAggregate.sid);
if (loc == -1)
{
loc = FindFirstRecordLocBySid(WindowTwoRecord.sid);
}
else
{
Records.RemoveAt(loc);
}
Records.Insert(loc, aggregate);
return loc;
}
else
{
IList records = Records;
EscherAggregate r = EscherAggregate.CreateAggregate(records, loc, drawingManager);
int startloc = loc;
while (loc + 1 < records.Count
&& records[loc] is DrawingRecord
&& (records[loc + 1] is ObjRecord ||
records[loc + 1] is TextObjectRecord)
)
{
loc += 2;
if (records[loc] is NoteRecord) loc ++;
}
int endloc = loc - 1;
for (int i = 0; i < (endloc - startloc + 1); i++)
{
records.RemoveAt(startloc);
}
records.Insert(startloc, r);
return startloc;
}
}