1 /*
2 * Copyright (c) 2023 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 #include "screen_setting_helper.h"
16
17 #include "window_manager_hilog.h"
18 #include "setting_provider.h"
19 #include "system_ability_definition.h"
20
21 namespace OHOS {
22 namespace Rosen {
23 namespace {
24 constexpr HiviewDFX::HiLogLabel LABEL = { LOG_CORE, HILOG_DOMAIN_WINDOW, "ScreenSettingHelper" };
25 }
26
27 sptr<SettingObserver> ScreenSettingHelper::dpiObserver_;
28
RegisterSettingDpiObserver(SettingObserver::UpdateFunc func)29 void ScreenSettingHelper::RegisterSettingDpiObserver(SettingObserver::UpdateFunc func)
30 {
31 if (dpiObserver_) {
32 WLOGFD("setting dpi observer is already registered");
33 return;
34 }
35 SettingProvider& provider = SettingProvider::GetInstance(DISPLAY_MANAGER_SERVICE_SA_ID);
36 dpiObserver_ = provider.CreateObserver(SETTING_DPI_KEY, func);
37 ErrCode ret = provider.RegisterObserver(dpiObserver_);
38 if (ret != ERR_OK) {
39 WLOGFW("register setting dpi observer failed, ret=%{public}d", ret);
40 dpiObserver_ = nullptr;
41 }
42 }
43
UnregisterSettingDpiObserver()44 void ScreenSettingHelper::UnregisterSettingDpiObserver()
45 {
46 if (dpiObserver_ == nullptr) {
47 WLOGFD("dpiObserver_ is nullptr, no need to unregister");
48 return;
49 }
50 SettingProvider& provider = SettingProvider::GetInstance(DISPLAY_MANAGER_SERVICE_SA_ID);
51 ErrCode ret = provider.UnregisterObserver(dpiObserver_);
52 if (ret != ERR_OK) {
53 WLOGFW("unregister setting dpi observer failed, ret=%{public}d", ret);
54 }
55 dpiObserver_ = nullptr;
56 }
57
GetSettingDpi(uint32_t & dpi,const std::string & key)58 bool ScreenSettingHelper::GetSettingDpi(uint32_t& dpi, const std::string& key)
59 {
60 SettingProvider& provider = SettingProvider::GetInstance(DISPLAY_MANAGER_SERVICE_SA_ID);
61 int32_t value;
62 ErrCode ret = provider.GetIntValue(key, value);
63 if (ret != ERR_OK) {
64 WLOGFW("get setting dpi failed, ret=%{public}d", ret);
65 return false;
66 }
67 dpi = static_cast<uint32_t>(value);
68 return true;
69 }
70 } // namespace Rosen
71 } // namespace OHOS