split_to_lines.js

function split_to_lines(str, max_width) {
  var current_line, lines, word, words, _i, _len;
  lines = [];
  words = str.split(' ');
  current_line = '';
  for (_i = 0, _len = words.length; _i < _len; _i++) {
    word = words[_i];
    if (current_line.length + word.length > max_width) {
      lines.push(current_line);
      current_line = word + ' ';
    } else {
      current_line += word + ' ';
    }
  }
  lines.push(current_line);
  return lines;
};