1 /*
2  * Copyright (C) 2019 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.accessibility;
18 
19 import android.content.Context;
20 
21 import androidx.preference.Preference;
22 import androidx.preference.PreferenceScreen;
23 
24 import com.android.internal.view.RotationPolicy;
25 import com.android.internal.view.RotationPolicy.RotationPolicyListener;
26 import com.android.settings.core.TogglePreferenceController;
27 import com.android.settingslib.core.lifecycle.LifecycleObserver;
28 import com.android.settingslib.core.lifecycle.events.OnStart;
29 import com.android.settingslib.core.lifecycle.events.OnStop;
30 
31 public class LockScreenRotationPreferenceController extends TogglePreferenceController implements
32         LifecycleObserver, OnStart, OnStop {
33 
34     private Preference mPreference;
35     private RotationPolicyListener mRotationPolicyListener;
36 
LockScreenRotationPreferenceController(Context context, String preferenceKey)37     public LockScreenRotationPreferenceController(Context context, String preferenceKey) {
38         super(context, preferenceKey);
39     }
40 
41     /**
42      * Returns true if rotation lock is enabled.
43      */
44     @Override
isChecked()45     public boolean isChecked() {
46         return !RotationPolicy.isRotationLocked(mContext);
47     }
48 
49     /**
50      * Enables or disables screen rotation lock from Accessibility settings. If rotation is locked
51      * for accessibility, the toggle in Display settings is hidden to avoid confusion.
52      */
53     @Override
setChecked(boolean isChecked)54     public boolean setChecked(boolean isChecked) {
55         RotationPolicy.setRotationLockForAccessibility(mContext, !isChecked);
56         return true;
57     }
58 
59     @Override
getAvailabilityStatus()60     public int getAvailabilityStatus() {
61         return RotationPolicy.isRotationSupported(mContext) ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
62     }
63 
64     @Override
onStop()65     public void onStop() {
66         if (mRotationPolicyListener != null) {
67             RotationPolicy.unregisterRotationPolicyListener(mContext, mRotationPolicyListener);
68         }
69     }
70 
71     @Override
onStart()72     public void onStart() {
73         if (mRotationPolicyListener == null) {
74             mRotationPolicyListener = new RotationPolicyListener() {
75                 @Override
76                 public void onChange() {
77                     if (mPreference != null) {
78                         updateState(mPreference);
79                     }
80                 }
81             };
82         }
83         RotationPolicy.registerRotationPolicyListener(mContext, mRotationPolicyListener);
84     }
85 
86     @Override
displayPreference(PreferenceScreen screen)87     public void displayPreference(PreferenceScreen screen) {
88         mPreference = screen.findPreference(getPreferenceKey());
89         super.displayPreference(screen);
90     }
91 }
92