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File: NodePath.js

/**
 * NodePath.js
 *
 * Released under LGPL License.
 * Copyright (c) 1999-2017 Ephox Corp. All rights reserved
 *
 * License: http://www.tinymce.com/license
 * Contributing: http://www.tinymce.com/contributing
 */

/**
 * Handles paths of nodes within an element.
 *
 * @private
 * @class tinymce.dom.NodePath
 */
define(
  'tinymce.core.dom.NodePath',
  [
    "tinymce.core.dom.DOMUtils"
  ],
  function (DOMUtils) {
    function create(rootNode, targetNode, normalized) {
      var path = [];

      for (; targetNode && targetNode != rootNode; targetNode = targetNode.parentNode) {
        path.push(DOMUtils.nodeIndex(targetNode, normalized));
      }

      return path;
    }

    function resolve(rootNode, path) {
      var i, node, children;

      for (node = rootNode, i = path.length - 1; i >= 0; i--) {
        children = node.childNodes;

        if (path[i] > children.length - 1) {
          return null;
        }

        node = children[path[i]];
      }

      return node;
    }

    return {
      create: create,
      resolve: resolve
    };
  }
);