Function getStateBefore

static/js/codemirror/codemirror.js:916–929

(cm, n)

  }

  function getStateBefore(cm, n) {
    var doc = cm.doc, display = cm.display;
      if (!doc.mode.startState) return true;
    var pos = findStartLine(cm, n), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
    if (!state) state = startState(doc.mode);
    else state = copyState(doc.mode, state);
    doc.iter(pos, n, function(line) {
      processLine(cm, line, state);
      var save = pos == n - 1 || pos % 5 == 0 || pos >= display.showingFrom && pos < display.showingTo;
      line.stateAfter = save ? copyState(doc.mode, state) : null;
      ++pos;
    });
    return state;
  }

  // POSITION MEASUREMENT