Function ensureLineWrapped

external/.scrollLibs.js:3318–3330

(lineView)

  // Lines with gutter elements, widgets or a background class need to
  // be wrapped, and have the extra elements added to the wrapper div
  function ensureLineWrapped(lineView) {
    if (lineView.node == lineView.text) {
      lineView.node = elt("div", null, null, "position: relative")
      if (lineView.text.parentNode) {
        lineView.text.parentNode.replaceChild(lineView.node, lineView.text)
      }
      lineView.node.appendChild(lineView.text)
      if (ie && ie_version < 8) {
        lineView.node.style.zIndex = 2
      }
    }
    return lineView.node
  }

  function updateLineBackground(cm, lineView) {
    var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass