private static RowBase PadInternal(
this RowBase row,
int requiredNumberOfColumnsSpanned)
{
if (row == null)
{
throw new ArgumentNullException(nameof(row));
}
if (requiredNumberOfColumnsSpanned <= 0)
{
throw new ArgumentOutOfRangeException(Invariant($"{nameof(requiredNumberOfColumnsSpanned)} must be > 0; provided value: {requiredNumberOfColumnsSpanned}."));
}
RowBase result;
var currentNumberOfColumnsSpanned = row.GetNumberOfColumnsSpanned();
if (currentNumberOfColumnsSpanned >= requiredNumberOfColumnsSpanned)
{
result = row;
}
else
{
var additionalColumnsSpanned = requiredNumberOfColumnsSpanned - currentNumberOfColumnsSpanned;
var newCells = row.Cells.ToList();
newCells.AddRange(Enumerable.Range(0, additionalColumnsSpanned).Select(_ => new NullCell()));
result = row.DeepCloneWithCells(newCells);
}
return(result);
}
/// <summary>
/// Gets the number of columns spanned by a row.
/// </summary>
/// <param name="row">The row.</param>
/// <returns>
/// The number of columns spanned the row.
/// </returns>
public static int GetNumberOfColumnsSpanned(
this RowBase row)
{
if (row == null)
{
throw new ArgumentNullException(nameof(row));
}
var result = row
.Cells
.Select(_ => _.ColumnsSpanned ?? 1)
.Sum();
return(result);
}