Function findStartLine

static/js/codemirror/codemirror.js:901–914

(cm, n)

  // smallest indentation, which tends to need the least context to
  // parse correctly.
  function findStartLine(cm, n) {
    var minindent, minline, doc = cm.doc;
    for (var search = n, lim = n - 100; search > lim; --search) {
      if (search <= doc.first) return doc.first;
      var line = getLine(doc, search - 1);
      if (line.stateAfter) return search;
      var indented = countColumn(line.text, null, cm.options.tabSize);
      if (minline == null || minindent > indented) {
        minline = search - 1;
        minindent = indented;
      }
    }
    return minline;
  }

  function getStateBefore(cm, n) {
    var doc = cm.doc, display = cm.display;