Function getNodeForCharacterOffset

docs/external/js/react-dom.development.js:6819–6840

* Get object describing the nodes which contain characters at offset. * * @param {DOMElement|DOMTextNode} root * @param {number} offset * @return {?object}

(root, offset)

  function getNodeForCharacterOffset(root, offset) {
    var node = getLeafNode(root);
    var nodeStart = 0;
    var nodeEnd = 0;

    while (node) {
      if (node.nodeType === TEXT_NODE) {
        nodeEnd = nodeStart + node.textContent.length;

        if (nodeStart <= offset && nodeEnd >= offset) {
          return {
            node: node,
            offset: offset - nodeStart
          };
        }

        nodeStart = nodeEnd;
      }

      node = getLeafNode(getSiblingNode(node));
    }
  }

  /**
   * @param {DOMElement} outerNode