1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settings.datetime;
18 
19 import static android.app.time.Capabilities.CAPABILITY_POSSESSED;
20 
21 import android.app.time.TimeManager;
22 import android.app.time.TimeZoneCapabilities;
23 import android.content.Context;
24 
25 import androidx.annotation.VisibleForTesting;
26 import androidx.preference.Preference;
27 
28 import com.android.settings.core.BasePreferenceController;
29 import com.android.settingslib.RestrictedPreference;
30 import com.android.settingslib.datetime.ZoneGetter;
31 
32 import java.util.Calendar;
33 
34 public class TimeZonePreferenceController extends BasePreferenceController {
35 
36     private final TimeManager mTimeManager;
37 
TimeZonePreferenceController(Context context, String preferenceKey)38     public TimeZonePreferenceController(Context context, String preferenceKey) {
39         super(context, preferenceKey);
40         mTimeManager = context.getSystemService(TimeManager.class);
41     }
42 
43     @Override
getSummary()44     public CharSequence getSummary() {
45         return getTimeZoneOffsetAndName();
46     }
47 
48     @Override
getAvailabilityStatus()49     public int getAvailabilityStatus() {
50         return shouldEnableManualTimeZoneSelection() ? AVAILABLE : DISABLED_DEPENDENT_SETTING;
51     }
52 
53     @Override
updateState(Preference preference)54     public void updateState(Preference preference) {
55         super.updateState(preference);
56 
57         if (preference instanceof RestrictedPreference
58                 && ((RestrictedPreference) preference).isDisabledByAdmin()) {
59             return;
60         }
61 
62         preference.setEnabled(shouldEnableManualTimeZoneSelection());
63     }
64 
65     @VisibleForTesting
getTimeZoneOffsetAndName()66     CharSequence getTimeZoneOffsetAndName() {
67         final Calendar now = Calendar.getInstance();
68         return ZoneGetter.getTimeZoneOffsetAndName(mContext,
69                 now.getTimeZone(), now.getTime());
70     }
71 
shouldEnableManualTimeZoneSelection()72     private boolean shouldEnableManualTimeZoneSelection() {
73         TimeZoneCapabilities timeZoneCapabilities =
74                 mTimeManager.getTimeZoneCapabilitiesAndConfig().getCapabilities();
75         int suggestManualTimeZoneCapability =
76                 timeZoneCapabilities.getSetManualTimeZoneCapability();
77         return suggestManualTimeZoneCapability == CAPABILITY_POSSESSED;
78     }
79 }
80