1 /*
2  * Copyright (C) 2021 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.gestures;
18 
19 import android.content.Context;
20 import android.database.ContentObserver;
21 import android.os.Handler;
22 import android.provider.Settings;
23 
24 import androidx.annotation.Nullable;
25 import androidx.preference.Preference;
26 import androidx.preference.PreferenceScreen;
27 
28 import com.android.settings.core.SliderPreferenceController;
29 import com.android.settings.widget.LabeledSeekBarPreference;
30 import com.android.settingslib.core.lifecycle.LifecycleObserver;
31 import com.android.settingslib.core.lifecycle.events.OnStart;
32 import com.android.settingslib.core.lifecycle.events.OnStop;
33 
34 /** Handles changes to the long press power button sensitivity slider. */
35 public class LongPressPowerSensitivityPreferenceController extends
36         SliderPreferenceController implements
37         LifecycleObserver, OnStart, OnStop {
38 
39     private final ContentObserver mPowerButtonObserver = new ContentObserver(Handler.getMain()) {
40         @Override
41         public void onChange(boolean selfChange) {
42             if (mPreference != null) {
43                 updateState(mPreference);
44             }
45         }
46     };
47 
48     @Nullable
49     private final int[] mSensitivityValues;
50 
51     @Nullable
52     private LabeledSeekBarPreference mPreference;
53 
LongPressPowerSensitivityPreferenceController(Context context, String preferenceKey)54     public LongPressPowerSensitivityPreferenceController(Context context, String preferenceKey) {
55         super(context, preferenceKey);
56         mSensitivityValues = context.getResources().getIntArray(
57                 com.android.internal.R.array.config_longPressOnPowerDurationSettings);
58     }
59 
60     @Override
onStart()61     public void onStart() {
62         mContext.getContentResolver().registerContentObserver(
63                 Settings.Global.getUriFor(PowerMenuSettingsUtils.POWER_BUTTON_LONG_PRESS_SETTING),
64                 false, mPowerButtonObserver);
65     }
66 
67     @Override
onStop()68     public void onStop() {
69         mContext.getContentResolver().unregisterContentObserver(mPowerButtonObserver);
70     }
71 
72     @Override
displayPreference(PreferenceScreen screen)73     public void displayPreference(PreferenceScreen screen) {
74         super.displayPreference(screen);
75         mPreference = screen.findPreference(getPreferenceKey());
76         if (mPreference != null) {
77             mPreference.setContinuousUpdates(false);
78             mPreference.setHapticFeedbackMode(
79                     LabeledSeekBarPreference.HAPTIC_FEEDBACK_MODE_ON_TICKS);
80             mPreference.setMin(getMin());
81             mPreference.setMax(getMax());
82         }
83     }
84 
85     @Override
updateState(Preference preference)86     public void updateState(Preference preference) {
87         super.updateState(preference);
88         final LabeledSeekBarPreference pref = (LabeledSeekBarPreference) preference;
89         pref.setEnabled(
90                 isAvailable() && PowerMenuSettingsUtils.isLongPressPowerForAssistEnabled(mContext));
91         pref.setProgress(getSliderPosition());
92     }
93 
94     @Override
getAvailabilityStatus()95     public int getAvailabilityStatus() {
96         if (mSensitivityValues == null || mSensitivityValues.length < 2) {
97             return UNSUPPORTED_ON_DEVICE;
98         }
99 
100         if (!PowerMenuSettingsUtils.isLongPressPowerForAssistEnabled(mContext)) {
101             return DISABLED_DEPENDENT_SETTING;
102         }
103 
104         return AVAILABLE;
105     }
106 
107     @Override
getSliderPosition()108     public int getSliderPosition() {
109         return mSensitivityValues == null ? 0 : closestValueIndex(mSensitivityValues,
110                 getCurrentSensitivityValue());
111     }
112 
113     @Override
setSliderPosition(int position)114     public boolean setSliderPosition(int position) {
115         if (mSensitivityValues == null || position < 0 || position >= mSensitivityValues.length) {
116             return false;
117         }
118         return Settings.Global.putInt(mContext.getContentResolver(),
119                 Settings.Global.POWER_BUTTON_LONG_PRESS_DURATION_MS,
120                 mSensitivityValues[position]);
121     }
122 
123     @Override
getMax()124     public int getMax() {
125         if (mSensitivityValues == null || mSensitivityValues.length == 0) {
126             return 0;
127         }
128         return mSensitivityValues.length - 1;
129     }
130 
131     @Override
getMin()132     public int getMin() {
133         return 0;
134     }
135 
getCurrentSensitivityValue()136     private int getCurrentSensitivityValue() {
137         return Settings.Global.getInt(mContext.getContentResolver(),
138                 Settings.Global.POWER_BUTTON_LONG_PRESS_DURATION_MS,
139                 mContext.getResources().getInteger(
140                         com.android.internal.R.integer.config_longPressOnPowerDurationMs));
141     }
142 
closestValueIndex(int[] values, int needle)143     private static int closestValueIndex(int[] values, int needle) {
144         int minDistance = Integer.MAX_VALUE;
145         int valueIndex = 0;
146         for (int i = 0; i < values.length; i++) {
147             int diff = Math.abs(values[i] - needle);
148             if (diff < minDistance) {
149                 minDistance = diff;
150                 valueIndex = i;
151             }
152         }
153         return valueIndex;
154     }
155 }
156