public void Save()
{
// if there are no columns remove tag "cols"
if (columns.Count == 0)
{
data.Remove();
return;
}
// clear existing columns
data.RemoveNodes();
// recalculate columns range
ColumnRange lastRange = null;
Column lastColumn = null;
foreach (var column in columns)
{
if (lastRange == null || !AreEqual(lastColumn, column))
{
lastRange = column.ToRange(data.Add("col"));
lastColumn = column;
}
else
{
lastRange.Max = column.Index + 1;
}
}
}
public void Remove()
{
drawings.Remove(this);
data.Remove();
}