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.annotation.Nullable; 20 import android.content.ContentResolver; 21 import android.content.Context; 22 import android.os.Handler; 23 import android.os.Looper; 24 import android.provider.Settings; 25 import android.view.accessibility.CaptioningManager; 26 27 import androidx.annotation.VisibleForTesting; 28 import androidx.preference.Preference; 29 import androidx.preference.PreferenceScreen; 30 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 BaseCaptioningCustomController 40 implements LifecycleObserver, OnStart, OnStop { 41 42 @Nullable 43 private Preference mCustom; 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 this(context, preferenceKey, 54 new AccessibilitySettingsContentObserver(new Handler(Looper.getMainLooper()))); 55 } 56 57 @VisibleForTesting CaptioningCustomController( Context context, String preferenceKey, AccessibilitySettingsContentObserver contentObserver)58 CaptioningCustomController( 59 Context context, String preferenceKey, 60 AccessibilitySettingsContentObserver contentObserver) { 61 super(context, preferenceKey); 62 mContentResolver = context.getContentResolver(); 63 mSettingsContentObserver = contentObserver; 64 mSettingsContentObserver.registerKeysToObserverCallback(CAPTIONING_FEATURE_KEYS, key -> { 65 if (mCustom != null) { 66 mCustom.setVisible(shouldShowPreference()); 67 } 68 }); 69 } 70 71 @Override displayPreference(PreferenceScreen screen)72 public void displayPreference(PreferenceScreen screen) { 73 super.displayPreference(screen); 74 mCustom = screen.findPreference(getPreferenceKey()); 75 if (mCustom != null) { 76 mCustom.setVisible(shouldShowPreference()); 77 } 78 } 79 80 @Override onStart()81 public void onStart() { 82 mSettingsContentObserver.register(mContentResolver); 83 } 84 85 @Override onStop()86 public void onStop() { 87 mSettingsContentObserver.unregister(mContentResolver); 88 } 89 shouldShowPreference()90 private boolean shouldShowPreference() { 91 return mCaptionHelper.getRawUserStyle() == CaptioningManager.CaptionStyle.PRESET_CUSTOM; 92 } 93 } 94