1/** 2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16import CommonEvent from '@ohos.commonEvent'; 17import { AsyncCallback, BusinessError} from 'basic'; 18import { CommonEventData } from 'commonEvent/commonEventData'; 19import { CommonEventSubscriber } from 'commonEvent/commonEventSubscriber'; 20import { CommonEventSubscribeInfo } from 'commonEvent/commonEventSubscribeInfo'; 21import { EventConstants } from '../constants/EventConstants'; 22import { localEventManager } from './LocalEventManager'; 23import commonEventManager from './CommonEventManager'; 24import { Log } from '../utils/Log'; 25 26const TAG = 'NavigationBarCommonEventManager'; 27 28/** 29 * Wrapper class for NavigationBarCommonEvent interfaces. 30 */ 31class NavigationBarCommonEventManager { 32 private static NAVIGATION_BAR_HIDE = 'systemui.event.NAVIGATIONBAR_HIDE'; 33 private static subscriber: CommonEventSubscriber; 34 private static eventCallback: AsyncCallback<CommonEventData>; 35 36 /** 37 * get NavigationBarCommonEvent instance 38 * 39 * @return NavigationBarCommonEvent singleton 40 */ 41 static getInstance(): NavigationBarCommonEventManager { 42 if (globalThis.NavigationBarCommonEvent == null) { 43 globalThis.NavigationBarCommonEvent = new NavigationBarCommonEventManager(); 44 this.eventCallback = this.navigationBarEventCallback.bind(this); 45 this.initSubscriber(); 46 } 47 return globalThis.NavigationBarCommonEvent; 48 } 49 50 private static initSubscriber() { 51 if (NavigationBarCommonEventManager.subscriber != null) { 52 return; 53 } 54 const subscribeInfo: CommonEventSubscribeInfo = { 55 events: [NavigationBarCommonEventManager.NAVIGATION_BAR_HIDE] 56 }; 57 CommonEvent.createSubscriber(subscribeInfo).then((commonEventSubscriber: CommonEventSubscriber) => { 58 Log.showDebug(TAG, "init SPLIT_SCREEN subscriber success"); 59 NavigationBarCommonEventManager.subscriber = commonEventSubscriber; 60 }, (err) => { 61 Log.showError(TAG, `Failed to createSubscriber ${err}`) 62 }) 63 } 64 65 /** 66 * Register navigationBar event listener. 67 */ 68 public registerNavigationBarEvent() { 69 commonEventManager.registerCommonEvent(NavigationBarCommonEventManager.subscriber, NavigationBarCommonEventManager.eventCallback); 70 } 71 72 /** 73 * Unregister navigationBar event listener. 74 */ 75 public unregisterNavigationBarEvent() { 76 commonEventManager.unregisterCommonEvent(NavigationBarCommonEventManager.subscriber, NavigationBarCommonEventManager.eventCallback); 77 } 78 79 /** 80 * navigationBar event handler. 81 */ 82 private static async navigationBarEventCallback(error: BusinessError, data: CommonEventData) { 83 Log.showDebug(TAG,`navigationBarEventCallback receive data: ${JSON.stringify(data)}.`); 84 if (error.code != 0) { 85 Log.showError(TAG, `navigationBarEventCallback error: ${JSON.stringify(error)}`); 86 return; 87 } 88 switch (data.event) { 89 case NavigationBarCommonEventManager.NAVIGATION_BAR_HIDE: 90 setTimeout(() => { 91 localEventManager.sendLocalEventSticky(EventConstants.EVENT_NAVIGATOR_BAR_STATUS_CHANGE, '0'); 92 }, 30) 93 default: 94 break; 95 } 96 } 97} 98 99export const navigationBarCommonEventManager = NavigationBarCommonEventManager.getInstance();