1 /* 2 * Copyright (c) 2025 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 16 #include "watermark_observer_manager.h" 17 18 #include "system_ability_definition.h" 19 20 namespace OHOS { 21 namespace EDM { 22 WatermarkObserverManager* WatermarkObserverManager::instance_; 23 std::once_flag WatermarkObserverManager::flag_; 24 GetInstance()25WatermarkObserverManager* WatermarkObserverManager::GetInstance() 26 { 27 EDMLOGI("WatermarkObserverManager::GetInstance"); 28 std::call_once(flag_, []() { 29 if (instance_ == nullptr) { 30 instance_ = new (std::nothrow) WatermarkObserverManager(); 31 } 32 }); 33 IWatermarkObserverManager::observerInstance_ = instance_; 34 return instance_; 35 } 36 SubscribeAppStateObserver()37bool WatermarkObserverManager::SubscribeAppStateObserver() 38 { 39 EDMLOGI("WatermarkObserverManager SubscribeAppStateObserver start"); 40 if (observer_) { 41 EDMLOGD("WatermarkObserverManager has subscribed"); 42 return true; 43 } 44 observer_ = new (std::nothrow) WatermarkApplicationObserver(); 45 auto appManager = GetAppManager(); 46 if (!observer_ || !appManager) { 47 EDMLOGE("register WatermarkApplicationObserver fail!"); 48 observer_.clear(); 49 observer_ = nullptr; 50 return false; 51 } 52 if (appManager->RegisterApplicationStateObserver(observer_) != ERR_OK) { 53 EDMLOGE("register WatermarkApplicationObserver fail!"); 54 observer_.clear(); 55 observer_ = nullptr; 56 return false; 57 } 58 return true; 59 } 60 UnSubscribeAppStateObserver()61bool WatermarkObserverManager::UnSubscribeAppStateObserver() 62 { 63 EDMLOGI("WatermarkObserverManager UnSubscribeAppStateObserver start"); 64 if (!observer_) { 65 EDMLOGD("WatermarkObserverManager has unsubscribed"); 66 return true; 67 } 68 auto appManager = GetAppManager(); 69 if (!appManager) { 70 EDMLOGE("appManager null"); 71 return false; 72 } 73 if (appManager->UnregisterApplicationStateObserver(observer_) != ERR_OK) { 74 EDMLOGE("Unregister WatermarkApplicationObserver fail!"); 75 return false; 76 } 77 observer_.clear(); 78 observer_ = nullptr; 79 return true; 80 } 81 GetAppManager()82sptr<AppExecFwk::IAppMgr> WatermarkObserverManager::GetAppManager() 83 { 84 auto remoteObject = EdmSysManager::GetRemoteObjectOfSystemAbility(APP_MGR_SERVICE_ID); 85 return iface_cast<AppExecFwk::IAppMgr>(remoteObject); 86 } 87 } // namespace EDM 88 } // namespace OHOS