public static DocTransform Deserialize(dynamic _reader)
{
DocTransform transform = new DocTransform(_reader.ReadInt32());
int iOpCount = _reader.ReadInt32();
List <DocOp> lOps = new List <DocOp>();
for (int iOp = 0; iOp < iOpCount; iOp++)
{
DocOpType opType = (DocOpType)_reader.ReadByte();
switch (opType)
{
case DocOpType.Insert:
lOps.Add(DocOp.Insert(_reader.ReadUInt16(), _reader.ReadInt32(), (char)_reader.ReadUInt16()));
break;
case DocOpType.Delete:
lOps.Add(DocOp.Delete(_reader.ReadUInt16(), _reader.ReadInt32()));
break;
}
}
transform.Append(lOps);
return(transform);
}
//----------------------------------------------------------------------
public static DocOp Delete(UInt16 _uiSite, int _iPosition)
{
DocOp docOp = new DocOp();
docOp.Type = DocOpType.Delete;
docOp.Site = _uiSite;
docOp.Position = _iPosition;
return(docOp);
}
//----------------------------------------------------------------------
public static DocOp Insert(UInt16 _uiSite, int _iPosition, char _char)
{
DocOp docOp = new DocOp();
docOp.Type = DocOpType.Insert;
docOp.Site = _uiSite;
docOp.Position = _iPosition;
docOp.Char = _char;
return(docOp);
}
public static List <DocOp> Delete(UInt16 _uiSite, int _iPosition, int _iCount)
{
List <DocOp> lOps = new List <DocOp>();
for (int i = 0; i < _iCount; i++)
{
DocOp deleteOp = DocOp.Delete(_uiSite, _iPosition);
lOps.Add(deleteOp);
}
return(lOps);
}
//----------------------------------------------------------------------
public static List <DocOp> Insert(UInt16 _uiSite, int _iPosition, string _strValue)
{
List <DocOp> lOps = new List <DocOp>();
for (int i = _strValue.Length - 1; i >= 0; i--)
{
DocOp insertOp = DocOp.Insert(_uiSite, _iPosition, _strValue[i]);
lOps.Add(insertOp);
}
return(lOps);
}
//----------------------------------------------------------------------
void TransformOp(DocOp _refOp)
{
for (int iOp = 0; iOp < mlOps.Count; iOp++)
{
DocOp op = mlOps[iOp];
// Based on http://www3.ntu.edu.sg/home/czsun/projects/otfaq/#_Toc308616441
switch (op.Type)
{
case DocOpType.Insert:
switch (_refOp.Type)
{
case DocOpType.Insert:
if (op.Position < _refOp.Position || (op.Position == _refOp.Position && op.Site > _refOp.Site))
{
continue;
}
else
{
mlOps[iOp] = DocOp.Insert(op.Site, op.Position + 1, op.Char);
}
break;
case DocOpType.Delete:
if (op.Position <= _refOp.Position)
{
continue;
}
else
{
mlOps[iOp] = DocOp.Insert(op.Site, op.Position - 1, op.Char);
}
break;
}
break;
case DocOpType.Delete:
switch (_refOp.Type)
{
case DocOpType.Insert:
if (op.Position < _refOp.Position)
{
continue;
}
else
{
mlOps[iOp] = DocOp.Delete(op.Site, op.Position + 1);
}
break;
case DocOpType.Delete:
if (op.Position < _refOp.Position)
{
continue;
}
else
if (op.Position > _refOp.Position)
{
mlOps[iOp] = DocOp.Delete(op.Site, op.Position - 1);
}
else
{
mlOps.RemoveAt(iOp);
iOp--;
}
break;
}
break;
}
}
}