/// <summary>
/// Gets the columns to remove.
/// </summary>
/// <param name="shapeModel">The shape model.</param>
/// <returns>A list of column indexes</returns>
private static List <int> GetColumnsToRemove(this ShapeModel shapeModel)
{
var columnsToRemove = new List <int>();
for (int col = shapeModel.LastColumn(); col >= 1; col--)
{
if (shapeModel.GetColumn(col).All(b => b.Color == CGA16Colors.Black.GetColor()))
{
columnsToRemove.Add(col);
}
else
{
break;
}
}
for (int col = 1; col <= shapeModel.LastColumn(); col++)
{
if (shapeModel.GetColumn(col).All(b => b.Color == CGA16Colors.Black.GetColor()))
{
columnsToRemove.Add(col);
}
else
{
break;
}
}
columnsToRemove.Sort();
columnsToRemove.Reverse();
return(columnsToRemove);
}
