1 /*
2  * Copyright (C) 2024 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 static com.android.settings.accessibility.AccessibilityUtil.State.OFF;
20 import static com.android.settings.accessibility.AccessibilityUtil.State.ON;
21 
22 import android.content.Context;
23 import android.content.res.Resources;
24 import android.database.ContentObserver;
25 import android.net.Uri;
26 import android.os.Handler;
27 import android.os.Looper;
28 import android.provider.Settings;
29 
30 import androidx.annotation.Nullable;
31 import androidx.annotation.VisibleForTesting;
32 import androidx.preference.Preference;
33 import androidx.preference.PreferenceScreen;
34 import androidx.preference.TwoStatePreference;
35 
36 import com.android.settings.R;
37 import com.android.settings.accessibility.MagnificationCapabilities.MagnificationMode;
38 import com.android.settingslib.core.lifecycle.LifecycleObserver;
39 import com.android.settingslib.core.lifecycle.events.OnPause;
40 import com.android.settingslib.core.lifecycle.events.OnResume;
41 
42 public class MagnificationOneFingerPanningPreferenceController extends
43         MagnificationFeaturePreferenceController implements LifecycleObserver, OnResume, OnPause {
44     static final String PREF_KEY = Settings.Secure.ACCESSIBILITY_SINGLE_FINGER_PANNING_ENABLED;
45 
46     private TwoStatePreference mSwitchPreference;
47 
48     @VisibleForTesting
49     final boolean mDefaultValue;
50 
51     @VisibleForTesting
52     final ContentObserver mContentObserver = new ContentObserver(
53             new Handler(Looper.getMainLooper())) {
54         @Override
55         public void onChange(boolean selfChange, @Nullable Uri uri) {
56             updateState(mSwitchPreference);
57         }
58     };
59 
MagnificationOneFingerPanningPreferenceController(Context context)60     public MagnificationOneFingerPanningPreferenceController(Context context) {
61         super(context, PREF_KEY);
62         boolean defaultValue;
63         try {
64             defaultValue = context.getResources().getBoolean(
65                     com.android.internal.R.bool.config_enable_a11y_magnification_single_panning);
66         } catch (Resources.NotFoundException e) {
67             defaultValue = false;
68         }
69         mDefaultValue = defaultValue;
70     }
71 
72     @Override
onResume()73     public void onResume() {
74         MagnificationCapabilities.registerObserver(mContext, mContentObserver);
75     }
76 
77     @Override
onPause()78     public void onPause() {
79         MagnificationCapabilities.unregisterObserver(mContext, mContentObserver);
80     }
81 
82     @Override
getAvailabilityStatus()83     public int getAvailabilityStatus() {
84         return isInSetupWizard() ? CONDITIONALLY_UNAVAILABLE : AVAILABLE;
85     }
86 
87     @Override
isChecked()88     public boolean isChecked() {
89         return Settings.Secure.getInt(
90                 mContext.getContentResolver(),
91                 PREF_KEY,
92                 (mDefaultValue) ? ON : OFF) == ON;
93     }
94 
95     @Override
setChecked(boolean isChecked)96     public boolean setChecked(boolean isChecked) {
97         var toReturn = Settings.Secure.putInt(mContext.getContentResolver(),
98                 PREF_KEY,
99                 (isChecked ? ON : OFF));
100         refreshSummary(mSwitchPreference);
101         return toReturn;
102     }
103 
104     @Override
getSummary()105     public CharSequence getSummary() {
106         if (!mSwitchPreference.isEnabled()) {
107             return mContext.getString(
108                     R.string.accessibility_magnification_one_finger_panning_summary_unavailable);
109         }
110 
111         return (isChecked())
112                 ? mContext.getString(
113                         R.string.accessibility_magnification_one_finger_panning_summary_on)
114                 : mContext.getString(
115                         R.string.accessibility_magnification_one_finger_panning_summary_off);
116     }
117 
118     @Override
getSliceHighlightMenuRes()119     public int getSliceHighlightMenuRes() {
120         return R.string.menu_key_accessibility;
121     }
122 
123     @Override
displayPreference(PreferenceScreen screen)124     public void displayPreference(PreferenceScreen screen) {
125         super.displayPreference(screen);
126         mSwitchPreference = screen.findPreference(getPreferenceKey());
127         updateState(mSwitchPreference);
128     }
129 
130     @Override
updateState(Preference preference)131     public void updateState(Preference preference) {
132         super.updateState(preference);
133 
134         if (preference == null) {
135             return;
136         }
137         @MagnificationMode int mode =
138                 MagnificationCapabilities.getCapabilities(mContext);
139         preference.setEnabled(
140                 mode == MagnificationMode.FULLSCREEN || mode == MagnificationMode.ALL);
141         refreshSummary(preference);
142     }
143 }
144