1 /* 2 * Copyright 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.development.linuxterminal; 18 19 import android.content.Context; 20 import android.content.pm.PackageManager; 21 import android.os.UserHandle; 22 import android.text.TextUtils; 23 import android.util.Log; 24 import android.widget.CompoundButton; 25 26 import androidx.annotation.NonNull; 27 import androidx.annotation.Nullable; 28 import androidx.annotation.VisibleForTesting; 29 import androidx.preference.Preference; 30 import androidx.preference.PreferenceScreen; 31 32 import com.android.settings.R; 33 import com.android.settings.core.BasePreferenceController; 34 import com.android.settings.core.PreferenceControllerMixin; 35 import com.android.settings.widget.SettingsMainSwitchPreference; 36 import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin; 37 38 /** Preference controller for enable/disable toggle of the linux terminal */ 39 public class EnableLinuxTerminalPreferenceController extends BasePreferenceController 40 implements CompoundButton.OnCheckedChangeListener, PreferenceControllerMixin { 41 @VisibleForTesting 42 static final int TERMINAL_PACKAGE_NAME_RESID = R.string.config_linux_terminal_app_package_name; 43 44 private static final String TAG = "LinuxTerminalPrefCtrl"; 45 46 private static final String ENABLE_TERMINAL_KEY = "enable_linux_terminal"; 47 48 @NonNull private final PackageManager mPackageManager; 49 private final boolean mIsPrimaryUser; 50 @Nullable private final String mTerminalPackageName; 51 52 @Nullable private SettingsMainSwitchPreference mPreference; 53 EnableLinuxTerminalPreferenceController( @onNull Context context, @NonNull Context userAwareContext, int userId)54 public EnableLinuxTerminalPreferenceController( 55 @NonNull Context context, @NonNull Context userAwareContext, int userId) { 56 this(context, userAwareContext, userId == UserHandle.myUserId()); 57 } 58 59 @VisibleForTesting EnableLinuxTerminalPreferenceController( @onNull Context context, @NonNull Context userAwareContext, boolean isPrimaryUser)60 EnableLinuxTerminalPreferenceController( 61 @NonNull Context context, @NonNull Context userAwareContext, boolean isPrimaryUser) { 62 super(context, ENABLE_TERMINAL_KEY); 63 64 mPackageManager = userAwareContext.getPackageManager(); 65 mIsPrimaryUser = isPrimaryUser; 66 67 String packageName = 68 userAwareContext.getString(R.string.config_linux_terminal_app_package_name); 69 mTerminalPackageName = 70 isPackageInstalled(mPackageManager, packageName) ? packageName : null; 71 } 72 73 @Override getAvailabilityStatus()74 public int getAvailabilityStatus() { 75 return AVAILABLE; 76 } 77 78 @Override displayPreference(@onNull PreferenceScreen screen)79 public void displayPreference(@NonNull PreferenceScreen screen) { 80 super.displayPreference(screen); 81 mPreference = screen.findPreference(getPreferenceKey()); 82 if (mPreference != null) { 83 mPreference.addOnSwitchChangeListener(this); 84 } 85 } 86 87 @Override onCheckedChanged(@onNull CompoundButton buttonView, boolean isChecked)88 public void onCheckedChanged(@NonNull CompoundButton buttonView, boolean isChecked) { 89 if (mTerminalPackageName == null) { 90 return; 91 } 92 93 int state = 94 isChecked 95 ? PackageManager.COMPONENT_ENABLED_STATE_ENABLED 96 : PackageManager.COMPONENT_ENABLED_STATE_DEFAULT; 97 mPackageManager.setApplicationEnabledSetting(mTerminalPackageName, state, /* flags= */ 0); 98 if (!isChecked) { 99 mPackageManager.clearApplicationUserData( 100 mTerminalPackageName, /* observer= */ null); 101 } 102 } 103 104 @Override 105 @SuppressWarnings("NullAway") // setDisabledByAdmin(EnforcedAdmin) doesn't have @Nullable updateState(@onNull Preference preference)106 public void updateState(@NonNull Preference preference) { 107 if (mPreference != preference) { 108 return; 109 } 110 111 boolean isInstalled = (mTerminalPackageName != null); 112 if (isInstalled) { 113 mPreference.setDisabledByAdmin(/* admin= */ null); 114 mPreference.setEnabled(/* enabled= */ true); 115 boolean terminalEnabled = 116 mPackageManager.getApplicationEnabledSetting(mTerminalPackageName) 117 == PackageManager.COMPONENT_ENABLED_STATE_ENABLED; 118 mPreference.setChecked(terminalEnabled); 119 } else { 120 if (mIsPrimaryUser) { 121 Log.e(TAG, "Terminal app doesn't exist for primary user but UI was shown"); 122 mPreference.setDisabledByAdmin(/* admin= */ null); 123 mPreference.setEnabled(/* enabled= */ false); 124 } else { 125 // If admin hasn't enabled the system app, mark it as disabled by admin. 126 mPreference.setDisabledByAdmin(new EnforcedAdmin()); 127 // Make it enabled, so clicking it would show error dialog. 128 mPreference.setEnabled(/* enabled= */ true); 129 } 130 mPreference.setChecked(/* checked= */ false); 131 } 132 } 133 isPackageInstalled(PackageManager manager, String packageName)134 private static boolean isPackageInstalled(PackageManager manager, String packageName) { 135 if (TextUtils.isEmpty(packageName)) { 136 return false; 137 } 138 try { 139 return manager.getPackageInfo( 140 packageName, 141 PackageManager.MATCH_ALL | PackageManager.MATCH_DISABLED_COMPONENTS) 142 != null; 143 } catch (PackageManager.NameNotFoundException e) { 144 return false; 145 } 146 } 147 } 148