1 /*
2  * Copyright (C) 2022 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.ContentResolver;
20 import android.content.Context;
21 import android.os.Handler;
22 import android.os.Looper;
23 import android.provider.Settings;
24 import android.view.accessibility.CaptioningManager;
25 
26 import androidx.annotation.VisibleForTesting;
27 import androidx.preference.Preference;
28 import androidx.preference.PreferenceScreen;
29 
30 import com.android.settings.core.BasePreferenceController;
31 import com.android.settingslib.core.lifecycle.LifecycleObserver;
32 import com.android.settingslib.core.lifecycle.events.OnStart;
33 import com.android.settingslib.core.lifecycle.events.OnStop;
34 
35 import java.util.Arrays;
36 import java.util.List;
37 
38 /** Preference controller for captioning custom visibility. */
39 public class CaptioningCustomController extends BasePreferenceController
40         implements LifecycleObserver, OnStart, OnStop {
41 
42     private Preference mCustom;
43     private final CaptionHelper mCaptionHelper;
44     private final ContentResolver mContentResolver;
45     @VisibleForTesting
46     AccessibilitySettingsContentObserver mSettingsContentObserver;
47     @VisibleForTesting
48     static final List<String> CAPTIONING_FEATURE_KEYS = Arrays.asList(
49             Settings.Secure.ACCESSIBILITY_CAPTIONING_PRESET
50     );
51 
CaptioningCustomController(Context context, String preferenceKey)52     public CaptioningCustomController(Context context, String preferenceKey) {
53         super(context, preferenceKey);
54         mCaptionHelper = new CaptionHelper(context);
55         mContentResolver = context.getContentResolver();
56         mSettingsContentObserver = new AccessibilitySettingsContentObserver(
57                 new Handler(Looper.getMainLooper()));
58         mSettingsContentObserver.registerKeysToObserverCallback(CAPTIONING_FEATURE_KEYS,
59                 key -> refreshShowingCustom());
60     }
61 
62     @VisibleForTesting
CaptioningCustomController(Context context, String preferenceKey, AccessibilitySettingsContentObserver contentObserver)63     CaptioningCustomController(Context context, String preferenceKey,
64             AccessibilitySettingsContentObserver contentObserver) {
65         this(context, preferenceKey);
66         mSettingsContentObserver = contentObserver;
67     }
68 
69     @Override
getAvailabilityStatus()70     public int getAvailabilityStatus() {
71         return AVAILABLE;
72     }
73 
74     @Override
displayPreference(PreferenceScreen screen)75     public void displayPreference(PreferenceScreen screen) {
76         super.displayPreference(screen);
77         mCustom = screen.findPreference(getPreferenceKey());
78         refreshShowingCustom();
79     }
80 
81     @Override
onStart()82     public void onStart() {
83         mSettingsContentObserver.register(mContentResolver);
84     }
85 
86     @Override
onStop()87     public void onStop() {
88         mSettingsContentObserver.unregister(mContentResolver);
89     }
90 
refreshShowingCustom()91     private void refreshShowingCustom() {
92         final boolean isCustomPreset =
93                 mCaptionHelper.getRawUserStyle() == CaptioningManager.CaptionStyle.PRESET_CUSTOM;
94         mCustom.setVisible(isCustomPreset);
95     }
96 }
97