text: /**
  @license
  Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
  This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
  The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
  The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
  Code distributed by Google as part of the polymer project is also
  subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
  */
  import '../utils/boot.js';
  import { dedupingMixin } from '../utils/mixin.js';
  import { addListener, removeListener } from '../utils/gestures.js';
  /**
   * Element class mixin that provides API for adding Polymer's cross-platform
   * gesture events to nodes.
   *
   * The API is designed to be compatible with override points implemented
   * in `TemplateStamp` such that declarative event listeners in
   * templates will support gesture events when this mixin is applied along with
   * `TemplateStamp`.
   *
   * @mixinFunction
   * @polymer
   * @summary Element class mixin that provides API for adding Polymer's
   *   cross-platform gesture events to nodes
   * @template T
   * @param {function(new:T)} superClass Class to apply mixin to.
   * @return {function(new:T)} superClass with mixin applied.
   */
  
  export const GestureEventListeners = dedupingMixin(superClass => {
    /**
     * @polymer
     * @mixinClass
     * @implements {Polymer_GestureEventListeners}
     */
    class GestureEventListeners extends superClass {
      /**
       * Add the event listener to the node if it is a gestures event.
       *
       * @param {!EventTarget} node Node to add event listener to
       * @param {string} eventName Name of event
       * @param {function(!Event):void} handler Listener function to add
       * @return {void}
       * @override
       */
      _addEventListenerToNode(node, eventName, handler) {
        if (!addListener(node, eventName, handler)) {
          super._addEventListenerToNode(node, eventName, handler);
        }
      }
      /**
       * Remove the event listener to the node if it is a gestures event.
       *
       * @param {!EventTarget} node Node to remove event listener from
       * @param {string} eventName Name of event
       * @param {function(!Event):void} handler Listener function to remove
       * @return {void}
       * @override
       */
  
  
      _removeEventListenerFromNode(node, eventName, handler) {
        if (!removeListener(node, eventName, handler)) {
          super._removeEventListenerFromNode(node, eventName, handler);
        }
      }
  
    }
  
    return GestureEventListeners;
  });