public void AddChild(IndentTreeNode child)
{
if (child != null)
{
Children.Add(child);
}
}
private static void doDump(IndentTreeNode treeNode, StringBuilder sb, string indent)
{
sb.AppendLine(indent + treeNode.Text);
foreach (var child in treeNode.Children)
{
doDump(child, sb, indent + @" ");
}
}
// https://stackoverflow.com/questions/21735468/parse-indented-text-tree-in-java
public static List <IndentTreeNode> Parse(IEnumerable <string> lines, int rootDepth = 0, char indentChar = '\t')
{
var roots = new List <IndentTreeNode>();
IndentTreeNode prev = null;
foreach (var line in lines)
{
if (string.IsNullOrEmpty(line.Trim(indentChar)))
{
continue;
}
//throw new Exception(@"Empty lines are not allowed.");
var currentDepth = countWhiteSpacesAtBeginningOfLine(line, indentChar);
if (currentDepth == rootDepth)
{
var root = new IndentTreeNode(line, rootDepth);
prev = root;
roots.Add(root);
}
else
{
if (prev == null)
{
throw new Exception(@"Unexpected indention.");
}
if (currentDepth > prev.Depth + 1)
{
throw new Exception(@"Unexpected indention (children were skipped).");
}
if (currentDepth > prev.Depth)
{
var node = new IndentTreeNode(line.Trim(), currentDepth, prev);
prev.AddChild(node);
prev = node;
}
else if (currentDepth == prev.Depth)
{
var node = new IndentTreeNode(line.Trim(), currentDepth, prev.Parent);
prev.Parent.AddChild(node);
prev = node;
}
else
{
while (currentDepth < prev.Depth)
{
prev = prev.Parent;
}
// at this point, (currentDepth == prev.Depth) = true
var node = new IndentTreeNode(line.Trim(indentChar), currentDepth, prev.Parent);
prev.Parent.AddChild(node);
}
}
}
return(roots);
}
public IndentTreeNode(string text, int depth = 0, IndentTreeNode parent = null)
{
Text = text;
Depth = depth;
Parent = parent;
}