public static IEnumerable<Segment> Parse(string s)
{
var segments = new List<Segment>();
var stack = new Stack<Tuple<int, Segment>>();
var lines = s.Split('\n');
foreach (var line in lines)
{
var match = Regex.Match(line, @"^(\s*)(.*)$");
var whiteSpace = match.Result("$1").Replace("\t", " ");
var text = match.Result("$2");
if (String.IsNullOrWhiteSpace(text))
{
stack.Clear();
continue;
}
var segment = new Segment(text.Trim());
var indent = whiteSpace.Length;
if (stack.Any())
{
while (stack.Any() && stack.Peek().Item1 >= indent)
stack.Pop();
if (stack.Any())
stack.Peek().Item2.Add(segment);
}
if (stack.Any() == false)
segments.Add(segment);
stack.Push(Tuple.Create(indent, segment));
}
return segments;
}
public void Add(Segment s)
{
_segments.Add(s);
}