Function widgetHeight

static/js/codemirror/codemirror.js:3801–3806

(widget)

  });

  function widgetHeight(widget) {
    if (widget.height != null) return widget.height;
    if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1)
      removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
    return widget.height = widget.node.offsetHeight;
  }

  function addLineWidget(cm, handle, node, options) {
    var widget = new LineWidget(cm, node, options);