@es-react/es-react/src/event/emitter-revoker.ts

Hippy react framework

/*
 * Tencent is pleased to support the open source community by making
 * Hippy available.
 *
 * Copyright (C) 2017-2019 THL A29 Limited, a Tencent company.
 * All rights reserved.
 *
 * 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
 *
 *   http://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.
 */

import HippyEventListener from './listener';

interface EventEmitterRevoker {
  callback: number | undefined;
  bindListener?: HippyEventListener | undefined;
}

class EventEmitterRevoker implements EventEmitterRevoker {
  public constructor(id: number, listener: HippyEventListener) {
    this.callback = id;
    this.bindListener = listener;
  }

  public remove() {
    if (typeof this.callback !== 'number' || !this.bindListener) {
      return;
    }
    this.bindListener.removeCallback(this.callback);
    this.bindListener = undefined;
  }
}

export default EventEmitterRevoker;