/// <summary>
/// Returns the result of the operator applied to the operands.
/// </summary>
/// <param name="left">The left operand.</param>
/// <param name="right">The right operand..</param>
/// <param name="context">
/// The <see cref="T:Dt.CalcEngine.CalcEvaluatorContext" /> associate with the operator evaluation.
/// </param>
/// <returns>
/// Result of the operator applied to the operand.
/// </returns>
public override object Evaluate(object left, object right, CalcEvaluatorContext context)
{
CalcReference reference = left as CalcReference;
CalcReference reference2 = right as CalcReference;
if (((reference == null) || (reference2 == null)) || (((reference.RangeCount != 1) || (reference2.RangeCount != 1)) || !reference.GetSource().Equals(reference2.GetSource())))
{
return(CalcErrors.Value);
}
CalcReference source = reference.GetSource();
if ((source == null) || !source.Equals(reference2.GetSource()))
{
return(CalcErrors.Value);
}
int row = reference.GetRow(0);
int column = reference.GetColumn(0);
int num3 = reference2.GetRow(0);
int num4 = reference2.GetColumn(0);
int num5 = Math.Max(row, num3);
int num6 = Math.Max(column, num4);
int rowCount = Math.Min((int)(row + reference.GetRowCount(0)), (int)(num3 + reference2.GetRowCount(0))) - num5;
int columnCount = Math.Min((int)(column + reference.GetColumnCount(0)), (int)(num4 + reference2.GetColumnCount(0))) - num6;
if ((rowCount >= 1) && (columnCount >= 1))
{
return(new ConcreteReference(source, num5, num6, rowCount, columnCount));
}
return(CalcErrors.Null);
}