/// <summary>
/// Gets the reference at specified position which indicated by <paramref name="id" />.
/// </summary>
/// <param name="id">A <see cref="T:Dt.CalcEngine.CalcIdentity" /> indicates the identity of a address.</param>
/// <returns>
/// An <see cref="T:System.Object" /> indicates the reference.
/// If the <paramref name="id" /> is not recognized, return <see cref="F:Dt.CalcEngine.CalcErrors.Reference" />.
/// </returns>
public virtual object GetReference(CalcIdentity id)
{
if (id is CalcExternalIdentity)
{
CalcExternalIdentity identity = id as CalcExternalIdentity;
ICalcSource source = identity.Source;
if (source != null)
{
return(source.GetReference(identity.ConvertToLocal()));
}
}
else
{
if (id is CalcSheetRangeIdentity)
{
IMultiSourceProvider provider = this.Source as IMultiSourceProvider;
if (provider == null)
{
return(CalcErrors.Reference);
}
try
{
CalcSheetRangeIdentity identity2 = id as CalcSheetRangeIdentity;
CalcLocalIdentity identity3 = identity2.ConvertToLocal();
List <CalcReference> references = new List <CalcReference>();
foreach (ICalcSource source2 in provider.GetCalcSources(identity2.StartSource, identity2.EndSource))
{
CalcReference item = source2.GetReference(identity3) as CalcReference;
if (item != null)
{
references.Add(item);
}
}
return(new SheetRangeReference(references));
}
catch
{
return(CalcErrors.Reference);
}
}
if ((this.Source != null) && (id is CalcLocalIdentity))
{
return(this.Source.GetReference(id as CalcLocalIdentity));
}
}
return(CalcErrors.Reference);
}
protected override CalcExpression VisitSheetRangeExpression(CalcSheetRangeExpression expr, int baseRow, int baseColumn)
{
bool flag = (this._maxRowIndex.HasValue && !expr.IsFullColumn) && expr.StartRowRelative;
bool flag2 = (this._maxColIndex.HasValue && !expr.IsFullRow) && expr.StartColumnRelative;
bool flag3 = (this._maxRowIndex.HasValue && !expr.IsFullColumn) && expr.EndRowRelative;
bool flag4 = (this._maxColIndex.HasValue && !expr.IsFullRow) && expr.EndColumnRelative;
if ((!flag && !flag2) && (!flag3 && !flag4))
{
return(expr);
}
int num = 0x7fffffff;
int num2 = 0x7fffffff;
IMultiSourceProvider startSource = expr.StartSource as IMultiSourceProvider;
if (startSource != null)
{
foreach (ICalcSource source in startSource.GetCalcSources(expr.StartSource, expr.EndSource))
{
num = (num >= source.GetRowCount()) ? (source.GetRowCount() - 1) : num;
num2 = (num2 >= source.GetColumnCount()) ? (source.GetColumnCount() - 1) : num2;
}
}
else
{
num = expr.StartSource.GetRowCount() - 1;
num2 = expr.EndSource.GetRowCount() - 1;
num = (num >= expr.EndSource.GetRowCount()) ? (expr.EndSource.GetRowCount() - 1) : num;
num2 = (num2 >= expr.EndSource.GetColumnCount()) ? (expr.EndSource.GetColumnCount() - 1) : num2;
}
CalcSheetRangeIdentity identity = this.GetId(expr, baseRow, baseColumn) as CalcSheetRangeIdentity;
int num3 = (identity.RowIndex + identity.RowCount) - 1;
int num4 = (identity.ColumnIndex + identity.ColumnCount) - 1;
if (((!flag || ((identity.RowIndex >= 0) && (identity.RowIndex <= num))) && (!flag2 || ((identity.ColumnIndex >= 0) && (identity.ColumnIndex <= num2)))) && ((!flag3 || ((num3 >= 0) && (num3 <= num))) && (!flag4 || ((num4 >= 0) && (num4 <= num2)))))
{
return(base.VisitSheetRangeExpression(expr, baseRow, baseColumn));
}
return(new CalcErrorExpression(CalcErrors.Reference));
}