public RangeCellReference(SingleCellReference startingCell, SingleCellReference endingCell)
{
if (startingCell == null)
{
throw new ArgumentNullException("startingCell");
}
if (endingCell == null)
{
throw new ArgumentNullException("endingCell");
}
this.StartingCellReference = startingCell;
this.EndingCellReference = endingCell;
this.Value = startingCell.Value + ":" + endingCell.Value;
}
/// <inheritdoc/>
/// <remarks>
/// Scaling a single cell reference will always result in a ranged cell reference. For example,
/// if you scale the single reference A1 by (2, 0) the result will be A1:A3. This works in both
/// directions.
/// </remarks>
public override ICellReference Resize(int row, int col)
{
var rowIdx = Math.Max(1, this.RowIndex + row);
var colIdx = Math.Max(1, this.ColumnIndex + col);
// If no changes were made, i.e. we're at origin scaling negative or (0, 0) was passed
if (rowIdx == this.RowIndex && colIdx == this.ColumnIndex)
{
return new SingleCellReference(this.RowIndex, this.ColumnIndex);
}
else
{
var start = new SingleCellReference(
Math.Min(this.RowIndex, rowIdx),
Math.Min(this.ColumnIndex, colIdx));
var end = new SingleCellReference(
Math.Max(this.RowIndex, rowIdx),
Math.Max(this.ColumnIndex, colIdx));
return new RangeCellReference(start, end);
}
}
/// <summary>
/// Detects if the target single cell reference lies within this range.
/// </summary>
/// <param name="cellRef">The cell reference to check.</param>
/// <returns>True if this range cell reference contains the target single cell reference.</returns>
private bool Contains(SingleCellReference cellRef)
{
// Always dealing with positive numbers.
return cellRef.ColumnIndex <= this.EndingCellReference.ColumnIndex &&
cellRef.RowIndex <= this.EndingCellReference.RowIndex;
}