/// <summary>
/// CTor
/// </summary>
/// <param name="reader"></param>
/// <param name="bsd"> Boundsheetdata container</param>
public WorksheetExtractor(VirtualStreamReader reader, WorkSheetData bsd)
: base(reader)
{
this.bsd = bsd;
this.extractData();
}
/// <summary>
/// Extracts the data from the stream
/// </summary>
public override void extractData()
{
BiffHeader bh;
//try
//{
while (this.StreamReader.BaseStream.Position < this.StreamReader.BaseStream.Length)
{
bh.id = (RecordType)this.StreamReader.ReadUInt16();
bh.length = this.StreamReader.ReadUInt16();
// Debugging output
TraceLogger.DebugInternal("BIFF {0}\t{1}\t", bh.id, bh.length);
switch (bh.id)
{
case RecordType.BoundSheet8:
{
// Extracts the Boundsheet data
var bs = new BoundSheet8(this.StreamReader, bh.id, bh.length);
TraceLogger.DebugInternal(bs.ToString());
SheetData sheetData = null;
switch (bs.dt)
{
case BoundSheet8.SheetType.Worksheet:
sheetData = new WorkSheetData();
this.oldOffset = this.StreamReader.BaseStream.Position;
this.StreamReader.BaseStream.Seek(bs.lbPlyPos, SeekOrigin.Begin);
var se = new WorksheetExtractor(this.StreamReader, sheetData as WorkSheetData);
this.StreamReader.BaseStream.Seek(this.oldOffset, SeekOrigin.Begin);
break;
case BoundSheet8.SheetType.Chartsheet:
var chartSheetData = new ChartSheetData();
this.oldOffset = this.StreamReader.BaseStream.Position;
this.StreamReader.BaseStream.Seek(bs.lbPlyPos, SeekOrigin.Begin);
chartSheetData.ChartSheetSequence = new ChartSheetSequence(this.StreamReader);
this.StreamReader.BaseStream.Seek(this.oldOffset, SeekOrigin.Begin);
sheetData = chartSheetData;
break;
default:
TraceLogger.Info("Unsupported sheet type: {0}", bs.dt);
break;
}
if (sheetData != null)
{
// add general sheet info
sheetData.boundsheetRecord = bs;
}
this.workBookData.addBoundSheetData(sheetData);
}
break;
case RecordType.Template:
{
this.workBookData.Template = true;
}
break;
case RecordType.SST:
{
/* reads the shared string table biff record and following continue records
* creates an array of bytes and then puts that into a memory stream
* this all is used to create a longer biffrecord then 8224 bytes. If theres a string
* beginning in the SST that is then longer then the 8224 bytes, it continues in the
* CONTINUE BiffRecord, so the parser has to read over the SST border.
* The problem here is, that the parser has to overread the continue biff record header
*/
SST sst;
ushort length = bh.length;
// save the old offset from this record begin
this.oldOffset = this.StreamReader.BaseStream.Position;
// create a list of bytearrays to store the following continue records
// List<byte[]> byteArrayList = new List<byte[]>();
var buffer = new byte[length];
var vsrList = new LinkedList <VirtualStreamReader>();
buffer = this.StreamReader.ReadBytes((int)length);
// byteArrayList.Add(buffer);
// create a new memory stream and a new virtualstreamreader
var bufferstream = new MemoryStream(buffer);
var binreader = new VirtualStreamReader(bufferstream);
BiffHeader bh2;
bh2.id = (RecordType)this.StreamReader.ReadUInt16();
while (bh2.id == RecordType.Continue)
{
bh2.length = (ushort)(this.StreamReader.ReadUInt16());
buffer = new byte[bh2.length];
// create a buffer with the bytes from the records and put that array into the
// list
buffer = this.StreamReader.ReadBytes((int)bh2.length);
// byteArrayList.Add(buffer);
// create for each continue record a new streamreader !!
var contbufferstream = new MemoryStream(buffer);
var contreader = new VirtualStreamReader(contbufferstream);
vsrList.AddLast(contreader);
// take next Biffrecord ID
bh2.id = (RecordType)this.StreamReader.ReadUInt16();
}
// set the old position of the stream
this.StreamReader.BaseStream.Position = this.oldOffset;
sst = new SST(binreader, bh.id, length, vsrList);
this.StreamReader.BaseStream.Position = this.oldOffset + bh.length;
this.workBookData.SstData = new SSTData(sst);
}
break;
case RecordType.EOF:
{
// Reads the end of the internal file !!!
this.StreamReader.BaseStream.Seek(0, SeekOrigin.End);
}
break;
case RecordType.ExternSheet:
{
var extsheet = new ExternSheet(this.StreamReader, bh.id, bh.length);
this.externSheets.Add(extsheet);
this.workBookData.addExternSheetData(extsheet);
}
break;
case RecordType.SupBook:
{
var supbook = new SupBook(this.StreamReader, bh.id, bh.length);
this.supBooks.Add(supbook);
this.workBookData.addSupBookData(supbook);
}
break;
case RecordType.XCT:
{
var xct = new XCT(this.StreamReader, bh.id, bh.length);
this.XCTList.Add(xct);
this.workBookData.addXCT(xct);
}
break;
case RecordType.CRN:
{
var crn = new CRN(this.StreamReader, bh.id, bh.length);
this.CRNList.Add(crn);
this.workBookData.addCRN(crn);
}
break;
case RecordType.ExternName:
{
var externname = new ExternName(this.StreamReader, bh.id, bh.length);
this.workBookData.addEXTERNNAME(externname);
}
break;
case RecordType.Format:
{
var format = new Format(this.StreamReader, bh.id, bh.length);
this.workBookData.styleData.addFormatValue(format);
}
break;
case RecordType.XF:
{
var xf = new XF(this.StreamReader, bh.id, bh.length);
this.workBookData.styleData.addXFDataValue(xf);
}
break;
case RecordType.Style:
{
var style = new Style(this.StreamReader, bh.id, bh.length);
this.workBookData.styleData.addStyleValue(style);
}
break;
case RecordType.Font:
{
var font = new Font(this.StreamReader, bh.id, bh.length);
this.workBookData.styleData.addFontData(font);
}
break;
case RecordType.NAME:
case RecordType.Lbl:
{
var name = new Lbl(this.StreamReader, bh.id, bh.length);
this.workBookData.addDefinedName(name);
}
break;
case RecordType.BOF:
{
this.workBookData.BOF = new BOF(this.StreamReader, bh.id, bh.length);
}
break;
case RecordType.CodeName:
{
this.workBookData.CodeName = new CodeName(this.StreamReader, bh.id, bh.length);
}
break;
case RecordType.FilePass:
throw new ExtractorException(ExtractorException.FILEENCRYPTED);
case RecordType.Palette:
{
var palette = new Palette(this.StreamReader, bh.id, bh.length);
this.workBookData.styleData.setColorList(palette.rgbColorList);
}
break;
default:
{
// this else statement is used to read BiffRecords which aren't implemented
var buffer = new byte[bh.length];
buffer = this.StreamReader.ReadBytes(bh.length);
TraceLogger.Debug("Unknown record found. ID {0}", bh.id);
}
break;
}
}
//}
//catch (Exception ex)
//{
// TraceLogger.Error(ex.Message);
// TraceLogger.Debug(ex.ToString());
//}
}
