private static string ToStringUnsafe <T>(this ITreeNode <T> root, StringFormat sf)
{
switch (sf)
{
case StringFormat.Default:
return($"{root.GetType()}: cur: {root.Current}, deep: [{root.ChildrenToString(sf, ", ")}]");
case StringFormat.NewLine:
{
string[] lines = $"{root.Current}{(root.Count > 0 ? ":" : "")}\n<NEEDTAB_TreeNode>{root.ChildrenToString(sf, "\n")}\n</NEEDTAB_TreeNode>".Split(new char[] { '\n' }, StringSplitOptions.RemoveEmptyEntries);
int count = 0, countOpen, countClose;
Regex regOpen = new Regex("<NEEDTAB_TreeNode>");
Regex regClose = new Regex("</NEEDTAB_TreeNode>");
for (long i = 0; i < lines.LongLength; i++)
{
countOpen = regOpen.Matches(lines[i]).Count;
countClose = regClose.Matches(lines[i]).Count;
count += countOpen - countClose;
if (count > 0)
{
lines[i] = lines[i].Insert(0, new string('\t', count));
}
if (countOpen != 0)
{
lines[i] = lines[i].Replace("<NEEDTAB_TreeNode>", "");
}
if (countClose != 0)
{
lines[i] = lines[i].Replace("</NEEDTAB_TreeNode>", "");
}
}
Regex needRemove = new Regex("^[\\t| ]+$");
List <string> LinesWithoutSpace = new List <string>(lines);
LinesWithoutSpace.RemoveAll(str => needRemove.Match(str).Success || str.Length == 0);
return(string.Join("\n", LinesWithoutSpace));
}
case StringFormat.Base:
return(root.GetType().ToString());
default:
throw new NotSupportedException($"Формат {sf} не поддерживается.");
}
}