1 /* 2 * Copyright (C) 2017 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.accessibilityservice.AccessibilityServiceInfo; 20 import android.content.ComponentName; 21 import android.content.Context; 22 import android.content.res.Resources; 23 import android.os.Bundle; 24 import android.provider.SearchIndexableResource; 25 import android.provider.Settings; 26 import android.support.v7.preference.Preference; 27 import android.text.TextUtils; 28 import android.view.View; 29 import android.view.accessibility.AccessibilityManager; 30 31 import com.android.internal.logging.nano.MetricsProto.MetricsEvent; 32 import com.android.settings.R; 33 import com.android.settings.SettingsPreferenceFragment; 34 import com.android.settings.search.BaseSearchIndexProvider; 35 import com.android.settings.search.Indexable; 36 37 import java.util.Arrays; 38 import java.util.Collections; 39 import java.util.List; 40 41 public final class MagnificationPreferenceFragment extends SettingsPreferenceFragment implements 42 Indexable { 43 44 // Settings App preference keys 45 private static final String PREFERENCE_TITLE_KEY = "magnification_preference_screen_title"; 46 private static final String MAGNIFICATION_GESTURES_PREFERENCE_SCREEN_KEY = 47 "screen_magnification_gestures_preference_screen"; 48 private static final String MAGNIFICATION_NAVBAR_PREFERENCE_SCREEN_KEY = 49 "screen_magnification_navbar_preference_screen"; 50 51 // Pseudo ComponentName used to represent navbar magnification in Settings.Secure. 52 private static final String MAGNIFICATION_COMPONENT_ID = 53 "com.android.server.accessibility.MagnificationController"; 54 55 private Preference mMagnificationGesturesPreference; 56 private Preference mMagnificationNavbarPreference; 57 58 private boolean mLaunchedFromSuw = false; 59 60 @Override 61 public void onCreatePreferences(Bundle bundle, String s) { 62 addPreferencesFromResource(R.xml.accessibility_magnification_settings); 63 mMagnificationGesturesPreference = findPreference( 64 MAGNIFICATION_GESTURES_PREFERENCE_SCREEN_KEY); 65 mMagnificationNavbarPreference = findPreference(MAGNIFICATION_NAVBAR_PREFERENCE_SCREEN_KEY); 66 } 67 68 @Override 69 protected int getHelpResource() { 70 return R.string.help_url_magnification; 71 } 72 73 @Override 74 public void onViewCreated(View view, Bundle savedInstanceState) { 75 super.onViewCreated(view, savedInstanceState); 76 77 final Bundle args = getArguments(); 78 if ((args != null) && args.containsKey(AccessibilitySettings.EXTRA_LAUNCHED_FROM_SUW)) { 79 mLaunchedFromSuw = args.getBoolean(AccessibilitySettings.EXTRA_LAUNCHED_FROM_SUW); 80 } 81 } 82 83 @Override 84 public void onResume() { 85 super.onResume(); 86 getActivity().setTitle(R.string.accessibility_screen_magnification_title); 87 updateFeatureSummary(Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED, 88 mMagnificationGesturesPreference); 89 updateFeatureSummary(Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED, 90 mMagnificationNavbarPreference); 91 } 92 93 @Override 94 public int getMetricsCategory() { 95 return MetricsEvent.ACCESSIBILITY_SCREEN_MAGNIFICATION_SETTINGS; 96 } 97 98 @Override 99 public boolean onPreferenceTreeClick(Preference preference) { 100 if (mLaunchedFromSuw) { 101 // If invoked from SUW, redirect to fragment instrumented for Vision Settings metrics 102 preference.setFragment( 103 ToggleScreenMagnificationPreferenceFragmentForSetupWizard.class.getName()); 104 } 105 if (mMagnificationGesturesPreference == preference) { 106 handleMagnificationGesturesPreferenceScreenClick(); 107 super.onPreferenceTreeClick(mMagnificationGesturesPreference); 108 return true; 109 } else if (mMagnificationNavbarPreference == preference) { 110 handleMagnificationNavbarPreferenceScreenClick(); 111 super.onPreferenceTreeClick(mMagnificationNavbarPreference); 112 return true; 113 } 114 return super.onPreferenceTreeClick(preference); 115 } 116 117 private void updateFeatureSummary(String prefKey, Preference pref) { 118 if (!mLaunchedFromSuw) { 119 final boolean enabled = Settings.Secure.getInt(getContentResolver(), prefKey, 0) == 1; 120 pref.setSummary(enabled ? R.string.accessibility_feature_state_on 121 : R.string.accessibility_feature_state_off); 122 } else { 123 if (Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED.equals(prefKey)) { 124 pref.setSummary(R.string.accessibility_screen_magnification_short_summary); 125 } else if (Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED.equals( 126 prefKey)) { 127 pref.setSummary(R.string.accessibility_screen_magnification_navbar_short_summary); 128 } 129 } 130 } 131 132 private void handleMagnificationGesturesPreferenceScreenClick() { 133 Bundle extras = mMagnificationGesturesPreference.getExtras(); 134 populateMagnificationGesturesPreferenceExtras(extras, getContext()); 135 extras.putBoolean(AccessibilitySettings.EXTRA_LAUNCHED_FROM_SUW, mLaunchedFromSuw); 136 } 137 138 private void handleMagnificationNavbarPreferenceScreenClick() { 139 Bundle extras = mMagnificationNavbarPreference.getExtras(); 140 extras.putString(AccessibilitySettings.EXTRA_PREFERENCE_KEY, 141 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED); 142 extras.putString(AccessibilitySettings.EXTRA_TITLE, getString( 143 R.string.accessibility_screen_magnification_navbar_title)); 144 extras.putCharSequence(AccessibilitySettings.EXTRA_SUMMARY, 145 getActivity().getResources().getText( 146 R.string.accessibility_screen_magnification_navbar_summary)); 147 extras.putBoolean(AccessibilitySettings.EXTRA_CHECKED, 148 Settings.Secure.getInt(getContentResolver(), 149 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED, 0) 150 == 1); 151 extras.putBoolean(AccessibilitySettings.EXTRA_LAUNCHED_FROM_SUW, mLaunchedFromSuw); 152 } 153 154 static CharSequence getConfigurationWarningStringForSecureSettingsKey(String key, 155 Context context) { 156 if (!Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED.equals(key)) { 157 return null; 158 } 159 if (Settings.Secure.getInt(context.getContentResolver(), 160 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_NAVBAR_ENABLED, 0) == 0) { 161 return null; 162 } 163 final AccessibilityManager am = (AccessibilityManager) context.getSystemService( 164 Context.ACCESSIBILITY_SERVICE); 165 final String assignedId = Settings.Secure.getString(context.getContentResolver(), 166 Settings.Secure.ACCESSIBILITY_BUTTON_TARGET_COMPONENT); 167 if (!TextUtils.isEmpty(assignedId) && !MAGNIFICATION_COMPONENT_ID.equals(assignedId)) { 168 final ComponentName assignedComponentName = ComponentName.unflattenFromString( 169 assignedId); 170 final List<AccessibilityServiceInfo> activeServices = 171 am.getEnabledAccessibilityServiceList( 172 AccessibilityServiceInfo.FEEDBACK_ALL_MASK); 173 final int serviceCount = activeServices.size(); 174 for (int i = 0; i < serviceCount; i++) { 175 final AccessibilityServiceInfo info = activeServices.get(i); 176 if (info.getComponentName().equals(assignedComponentName)) { 177 final CharSequence assignedServiceName = info.getResolveInfo().loadLabel( 178 context.getPackageManager()); 179 return context.getString( 180 R.string.accessibility_screen_magnification_navbar_configuration_warning, 181 assignedServiceName); 182 } 183 } 184 } 185 return null; 186 } 187 188 static void populateMagnificationGesturesPreferenceExtras(Bundle extras, Context context) { 189 extras.putString(AccessibilitySettings.EXTRA_PREFERENCE_KEY, 190 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED); 191 extras.putString(AccessibilitySettings.EXTRA_TITLE, context.getString( 192 R.string.accessibility_screen_magnification_gestures_title)); 193 extras.putCharSequence(AccessibilitySettings.EXTRA_SUMMARY, context.getResources().getText( 194 R.string.accessibility_screen_magnification_summary)); 195 extras.putBoolean(AccessibilitySettings.EXTRA_CHECKED, 196 Settings.Secure.getInt(context.getContentResolver(), 197 Settings.Secure.ACCESSIBILITY_DISPLAY_MAGNIFICATION_ENABLED, 0) == 1); 198 extras.putInt(AccessibilitySettings.EXTRA_VIDEO_RAW_RESOURCE_ID, 199 R.raw.accessibility_screen_magnification); 200 } 201 202 /** 203 * @return {@code true} if this fragment should be shown, {@code false} otherwise. This 204 * fragment is shown in the case that more than one magnification mode is available. 205 */ 206 static boolean isApplicable(Resources res) { 207 return res.getBoolean(com.android.internal.R.bool.config_showNavigationBar); 208 } 209 210 public static final Indexable.SearchIndexProvider SEARCH_INDEX_DATA_PROVIDER = 211 new BaseSearchIndexProvider() { 212 @Override 213 public List<SearchIndexableResource> getXmlResourcesToIndex(Context context, 214 boolean enabled) { 215 if (isApplicable(context.getResources())) { 216 final SearchIndexableResource sir = new SearchIndexableResource(context); 217 sir.xmlResId = R.xml.accessibility_magnification_settings; 218 return Arrays.asList(sir); 219 } else { 220 return Collections.emptyList(); 221 } 222 } 223 224 @Override 225 public List<String> getNonIndexableKeys(Context context) { 226 List<String> keys = super.getNonIndexableKeys(context); 227 keys.add(PREFERENCE_TITLE_KEY); 228 return keys; 229 } 230 }; 231 } 232
