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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.role.controller.behavior;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PermissionInfo;
import android.content.pm.ResolveInfo;
import android.os.Build;
import android.os.UserHandle;
import android.provider.Settings;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
import com.android.modules.utils.build.SdkLevel;
import com.android.role.controller.model.AppOpPermissions;
import com.android.role.controller.model.Permissions;
import com.android.role.controller.model.Role;
import com.android.role.controller.model.RoleBehavior;
import com.android.role.controller.model.VisibilityMixin;
import com.android.role.controller.util.UserUtils;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
/**
* Class for behavior of the home role.
*
* @see com.android.settings.applications.DefaultAppSettings
* @see com.android.settings.applications.defaultapps.DefaultHomePreferenceController
* @see com.android.settings.applications.defaultapps.DefaultHomePicker
*/
public class HomeRoleBehavior implements RoleBehavior {
private static final List<String> AUTOMOTIVE_PERMISSIONS = Arrays.asList(
android.Manifest.permission.READ_CALL_LOG,
android.Manifest.permission.WRITE_CALL_LOG,
android.Manifest.permission.READ_CONTACTS);
@RequiresApi(Build.VERSION_CODES.TIRAMISU)
private static final List<String> WEAR_PERMISSIONS_T = Arrays.asList(
android.Manifest.permission.POST_NOTIFICATIONS,
android.Manifest.permission.SYSTEM_APPLICATION_OVERLAY);
@RequiresApi(Build.VERSION_CODES.VANILLA_ICE_CREAM)
private static final List<String> WEAR_PERMISSIONS_V = Arrays.asList(
android.Manifest.permission.ALWAYS_UPDATE_WALLPAPER);
private static final List<String> WEAR_APP_OP_PERMISSIONS = Arrays.asList(
android.Manifest.permission.SYSTEM_ALERT_WINDOW);
@Override
public boolean isAvailableAsUser(@NonNull Role role, @NonNull UserHandle user,
@NonNull Context context) {
return !UserUtils.isProfile(user, context);
}
/**
* @see com.android.server.pm.PackageManagerService#getDefaultHomeActivity(int)
*/
@Nullable
@Override
public String getFallbackHolderAsUser(@NonNull Role role, @NonNull UserHandle user,
@NonNull Context context) {
Context userContext = UserUtils.getUserContext(context, user);
PackageManager userPackageManager = userContext.getPackageManager();
Intent intent = role.getRequiredComponents().get(0).getIntentFilterData().createIntent();
List<ResolveInfo> resolveInfos = userPackageManager.queryIntentActivities(intent,
PackageManager.MATCH_DEFAULT_ONLY | PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
String packageName = null;
int priority = Integer.MIN_VALUE;
int resolveInfosSize = resolveInfos.size();
for (int i = 0; i < resolveInfosSize; i++) {
ResolveInfo resolveInfo = resolveInfos.get(i);
// Leave the fallback to PackageManagerService if there is only the fallback home in
// Settings, because if we fallback to it here, we cannot fallback to a normal home
// later, and user cannot see the fallback home in the UI anyway.
if (isSettingsApplicationAsUser(resolveInfo.activityInfo.applicationInfo, user,
context)) {
continue;
}
if (resolveInfo.priority > priority) {
packageName = resolveInfo.activityInfo.packageName;
priority = resolveInfo.priority;
} else if (resolveInfo.priority == priority) {
packageName = null;
}
}
return packageName;
}
/**
* Check if the application is a settings application
*/
private static boolean isSettingsApplicationAsUser(@NonNull ApplicationInfo applicationInfo,
@NonNull UserHandle user, @NonNull Context context) {
Context userContext = UserUtils.getUserContext(context, user);
PackageManager userPackageManager = userContext.getPackageManager();
ResolveInfo resolveInfo = userPackageManager.resolveActivity(
new Intent(Settings.ACTION_SETTINGS), PackageManager.MATCH_DEFAULT_ONLY
| PackageManager.MATCH_DIRECT_BOOT_AWARE
| PackageManager.MATCH_DIRECT_BOOT_UNAWARE);
if (resolveInfo == null || resolveInfo.activityInfo == null
|| !resolveInfo.activityInfo.exported) {
return false;
}
return Objects.equals(applicationInfo.packageName, resolveInfo.activityInfo.packageName);
}
@Override
public void onHolderSelectedAsUser(@NonNull Role role, @NonNull String packageName,
@NonNull UserHandle user, @NonNull Context context) {
// Launch the new home app so the change is immediately visible even if the home button is
// not pressed.
Intent intent = new Intent(Intent.ACTION_MAIN)
.addCategory(Intent.CATEGORY_HOME)
.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
context.startActivity(intent);
}
@Override
public void grantAsUser(@NonNull Role role, @NonNull String packageName,
@NonNull UserHandle user, @NonNull Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
Permissions.grantAsUser(packageName, AUTOMOTIVE_PERMISSIONS,
true, false, true, false, false, user, context);
}
// Before T, ALLOW_SLIPPERY_TOUCHES may either not exist, or may not be a role permission
if (isRolePermission(android.Manifest.permission.ALLOW_SLIPPERY_TOUCHES, context)) {
Permissions.grantAsUser(packageName,
Arrays.asList(android.Manifest.permission.ALLOW_SLIPPERY_TOUCHES),
true, false, true, false, false, user, context);
}
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {
if (SdkLevel.isAtLeastT()) {
Permissions.grantAsUser(packageName, WEAR_PERMISSIONS_T,
true, false, true, false, false, user, context);
for (String permission : WEAR_APP_OP_PERMISSIONS) {
AppOpPermissions.grantAsUser(packageName, permission, true, user, context);
}
}
if (SdkLevel.isAtLeastV()) {
Permissions.grantAsUser(packageName, WEAR_PERMISSIONS_V,
true, false, true, false, false, user, context);
}
}
}
@Override
public void revokeAsUser(@NonNull Role role, @NonNull String packageName,
@NonNull UserHandle user, @NonNull Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE)) {
Permissions.revokeAsUser(packageName, AUTOMOTIVE_PERMISSIONS, true, false, false,
user, context);
}
// Before T, ALLOW_SLIPPERY_TOUCHES may either not exist, or may not be a role permission
if (isRolePermission(android.Manifest.permission.ALLOW_SLIPPERY_TOUCHES, context)) {
Permissions.revokeAsUser(packageName,
Arrays.asList(android.Manifest.permission.ALLOW_SLIPPERY_TOUCHES),
true, false, false, user, context);
}
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH)) {
if (SdkLevel.isAtLeastT()) {
Permissions.revokeAsUser(packageName, WEAR_PERMISSIONS_T, true, false, false,
user, context);
for (String permission : WEAR_APP_OP_PERMISSIONS) {
AppOpPermissions.revokeAsUser(packageName, permission, user, context);
}
}
if (SdkLevel.isAtLeastV()) {
Permissions.revokeAsUser(packageName, WEAR_PERMISSIONS_V, true, false, false,
user, context);
}
}
}
/**
* Return true if the permission exists, and has 'role' protection level.
* Return false otherwise.
*/
private boolean isRolePermission(@NonNull String permissionName, @NonNull Context context) {
PermissionInfo permissionInfo;
try {
permissionInfo = context.getPackageManager().getPermissionInfo(permissionName, 0);
} catch (PackageManager.NameNotFoundException e) {
return false;
}
final int flags = permissionInfo.getProtectionFlags();
return (flags & PermissionInfo.PROTECTION_FLAG_ROLE) == PermissionInfo.PROTECTION_FLAG_ROLE;
}
@Override
public boolean isVisibleAsUser(@NonNull Role role, @NonNull UserHandle user,
@NonNull Context context) {
return VisibilityMixin.isVisible("config_showDefaultHome", false, user, context);
}
@Override
public boolean isApplicationVisibleAsUser(@NonNull Role role,
@NonNull ApplicationInfo applicationInfo, @NonNull UserHandle user,
@NonNull Context context) {
return !isSettingsApplicationAsUser(applicationInfo, user, context);
}
}
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