/// <summary>
/// Takes the existing numbering groups in this stack and increments the last one.
/// Returns a full string of the last group along with any (contiguously) concatenated values from higher in the stack
/// </summary>
/// <returns></returns>
public string Increment()
{
if (this.Count == 0)
{
return(string.Empty);
}
//Get the highest group that is concatenated
int index = this.Count - 1;
while (index >= 0)
{
if (_items[index].ConcatenateWithParent == false)
{
break;
}
else if (index == 0)
{
break;
}
else
{
index--;
}
}
if (index < 0)
{
return(string.Empty);
}
//Concatenate all the values together
StringBuilder sb = new StringBuilder();
for (int depth = index; depth < this.Count; depth++)
{
PDFListNumberingGroup curr = this._items[depth];
if (depth == this.Count - 1)
{
curr.Increment();
}
string value = curr.ToString(depth);
if (null != value)
{
sb.Append(value);
}
}
return(sb.ToString());
}