Function restoreSelection

docs/external/js/react-dom.development.js:7109–7143

* @restoreSelection: If any selection information was potentially lost, * restore it. This is useful when performing operations that could remove dom * nodes and place them back in, resulting in focus being lost.

(priorSelectionInformation)

   */

  function restoreSelection(priorSelectionInformation) {
    var curFocusedElem = getActiveElementDeep();
    var priorFocusedElem = priorSelectionInformation.focusedElem;
    var priorSelectionRange = priorSelectionInformation.selectionRange;

    if (curFocusedElem !== priorFocusedElem && isInDocument(priorFocusedElem)) {
      if (priorSelectionRange !== null && hasSelectionCapabilities(priorFocusedElem)) {
        setSelection(priorFocusedElem, priorSelectionRange);
      } // Focusing a node can change the scroll position, which is undesirable


      var ancestors = [];
      var ancestor = priorFocusedElem;

      while (ancestor = ancestor.parentNode) {
        if (ancestor.nodeType === ELEMENT_NODE) {
          ancestors.push({
            element: ancestor,
            left: ancestor.scrollLeft,
            top: ancestor.scrollTop
          });
        }
      }

      if (typeof priorFocusedElem.focus === 'function') {
        priorFocusedElem.focus();
      }

      for (var i = 0; i < ancestors.length; i++) {
        var info = ancestors[i];
        info.element.scrollLeft = info.left;
        info.element.scrollTop = info.top;
      }
    }
  }
  /**
   * @getSelection: Gets the selection bounds of a focused textarea, input or
   * contentEditable node.