“use strict”; const addConstants = require(“../utils”).addConstants;

module.exports = function (core) {

// https://dom.spec.whatwg.org/#interface-nodefilter
core.NodeFilter = function () {
  throw new TypeError("Illegal constructor");
};

/**
 * Returns an unsigned short that will be used to tell if a given Node must
 * be accepted or not by the NodeIterator or TreeWalker iteration
 * algorithm. This method is expected to be written by the user of a
 * NodeFilter.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/API/NodeFilter
 * @interface
 *
 * @param  {Node} node DOM Node
 * @return {FILTER_ACCEPT|FILTER_REJECT|FILTER_SKIP}
 */
core.NodeFilter.acceptNode = function (/* node */) {
  throw new Error("This method is expected to be written by the user of a NodeFilter.");
};

addConstants(core.NodeFilter, {
  // Constants for whatToShow
  SHOW_ALL: 0xFFFFFFFF,
  SHOW_ELEMENT: 0x00000001,
  SHOW_ATTRIBUTE: 0x00000002,
  SHOW_TEXT: 0x00000004,
  SHOW_CDATA_SECTION: 0x00000008,
  SHOW_ENTITY_REFERENCE: 0x00000010,
  SHOW_ENTITY: 0x00000020,
  SHOW_PROCESSING_INSTRUCTION: 0x00000040,
  SHOW_COMMENT: 0x00000080,
  SHOW_DOCUMENT: 0x00000100,
  SHOW_DOCUMENT_TYPE: 0x00000200,
  SHOW_DOCUMENT_FRAGMENT: 0x00000400,
  SHOW_NOTATION: 0x00000800,

  // Constants returned by acceptNode
  FILTER_ACCEPT: 1,
  FILTER_REJECT: 2,
  FILTER_SKIP: 3
});

};