/*
 * Copyright 2020 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

let inputPromise: Promise<Event>;

export const whenInput = () => {
  if (!inputPromise) {
    inputPromise = new Promise((r) => {
      return ['scroll', 'keydown', 'pointerdown'].map((type) => {
        addEventListener(type, r, {
          once: true,
          passive: true,
          capture: true,
        });
      });
    });
  }
  return inputPromise;
};