fold_labels.cs

gistfile1.txt

// cat thoughts.dot | mono fold_labels.exe 40 | unflatten | dot -Tpdf > thoughts.pdf && open thoughts.pdf
// unflatten makes the graph less... flat

using System;
using System.Text;
using System.Text.RegularExpressions;

class Fold
{
    static void FoldTillQuotes (StringBuilder s, int i, int maxlen)
    {
	int last_space = -1;
	int last_wrap = i;
	
	do {
	    if (s[i] == ' ')
		last_space = i;
	    if (i - last_wrap >= maxlen && last_space != -1) {
		s[last_space] = '\n';
		last_wrap = i;
	    }
		
	} while (s[i++] != '"');
    }
    
    static void Main (string[] args)
    {
	string line;
	var regex = new Regex("label ?= ?\"");
	int maxlen;
	
	if (args.Length == 0)
	    maxlen = 40;
	else
	    maxlen = int.Parse (args[0]);
	
	while ((line = Console.ReadLine()) != null)
	{	    
	    var sbline = new StringBuilder(line);
	    var matches = regex.Matches (line);
	    if (matches.Count > 0) {
		foreach (Match match in matches)
		    FoldTillQuotes (sbline, match.Index+match.Length, maxlen);
	    }
	    Console.WriteLine (sbline.ToString());
	}
    }
}