Function farAway

static/editor.md/lib/codemirror/lib/codemirror.js:3323–3327

(touch, other)

      return touch.radiusX <= 1 && touch.radiusY <= 1;
    }
    function farAway(touch, other) {
      if (other.left == null) return true;
      var dx = other.left - touch.left, dy = other.top - touch.top;
      return dx * dx + dy * dy > 20 * 20;
    }
    on(d.scroller, "touchstart", function(e) {
      if (!isMouseLikeTouchEvent(e)) {
        clearTimeout(touchFinished);