1 /*
2  * Copyright (C) 2017 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.development;
18 
19 import android.content.Context;
20 import android.provider.Settings;
21 import android.sysprop.DisplayProperties;
22 
23 import androidx.annotation.VisibleForTesting;
24 import androidx.preference.Preference;
25 import androidx.preference.SwitchPreference;
26 
27 import com.android.internal.app.LocalePicker;
28 import com.android.settings.core.PreferenceControllerMixin;
29 import com.android.settingslib.development.DeveloperOptionsPreferenceController;
30 
31 public class RtlLayoutPreferenceController extends DeveloperOptionsPreferenceController implements
32         Preference.OnPreferenceChangeListener, PreferenceControllerMixin {
33 
34     private static final String FORCE_RTL_LAYOUT_KEY = "force_rtl_layout_all_locales";
35 
36     @VisibleForTesting
37     static final int SETTING_VALUE_ON = 1;
38     @VisibleForTesting
39     static final int SETTING_VALUE_OFF = 0;
40 
RtlLayoutPreferenceController(Context context)41     public RtlLayoutPreferenceController(Context context) {
42         super(context);
43     }
44 
45     @Override
getPreferenceKey()46     public String getPreferenceKey() {
47         return FORCE_RTL_LAYOUT_KEY;
48     }
49 
50     @Override
onPreferenceChange(Preference preference, Object newValue)51     public boolean onPreferenceChange(Preference preference, Object newValue) {
52         final boolean isEnabled = (Boolean) newValue;
53         writeToForceRtlLayoutSetting(isEnabled);
54         updateLocales();
55         return true;
56     }
57 
58     @Override
updateState(Preference preference)59     public void updateState(Preference preference) {
60         int rtlLayoutMode = Settings.Global.getInt(mContext.getContentResolver(),
61                 Settings.Global.DEVELOPMENT_FORCE_RTL, SETTING_VALUE_OFF);
62         ((SwitchPreference) mPreference).setChecked(rtlLayoutMode != SETTING_VALUE_OFF);
63     }
64 
65     @Override
onDeveloperOptionsSwitchDisabled()66     protected void onDeveloperOptionsSwitchDisabled() {
67         super.onDeveloperOptionsSwitchDisabled();
68         writeToForceRtlLayoutSetting(false);
69         updateLocales();
70         ((SwitchPreference) mPreference).setChecked(false);
71     }
72 
73     @VisibleForTesting
updateLocales()74     void updateLocales() {
75         LocalePicker.updateLocales(mContext.getResources().getConfiguration().getLocales());
76     }
77 
writeToForceRtlLayoutSetting(boolean isEnabled)78     private void writeToForceRtlLayoutSetting(boolean isEnabled) {
79         Settings.Global.putInt(mContext.getContentResolver(),
80                 Settings.Global.DEVELOPMENT_FORCE_RTL,
81                 isEnabled ? SETTING_VALUE_ON : SETTING_VALUE_OFF);
82         DisplayProperties.debug_force_rtl(isEnabled);
83     }
84 }
85