Function isHeader

static/editor.md/lib/codemirror/addon/fold/markdown-fold.js:17–20

(lineNo)

  var maxDepth = 100;

  function isHeader(lineNo) {
    var tokentype = cm.getTokenTypeAt(CodeMirror.Pos(lineNo, 0));
    return tokentype && /\bheader\b/.test(tokentype);
  }

  function headerLevel(lineNo, line, nextLine) {
    var match = line && line.match(/^#+/);