android-34/com/android/server/grammaticalinflection/GrammaticalInflectionService.java

/*
 * Copyright (C) 2022 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.server.grammaticalinflection;

import static android.content.res.Configuration.GRAMMATICAL_GENDER_NOT_SPECIFIED;

import android.annotation.Nullable;
import android.app.IGrammaticalInflectionManager;
import android.content.Context;
import android.content.pm.PackageManagerInternal;
import android.os.Binder;
import android.os.IBinder;
import android.os.Process;
import android.os.SystemProperties;
import android.util.Log;

import com.android.internal.util.FrameworkStatsLog;
import com.android.server.LocalServices;
import com.android.server.SystemService;
import com.android.server.wm.ActivityTaskManagerInternal;

/**
 * The implementation of IGrammaticalInflectionManager.aidl.
 *
 * <p>This service is API entry point for storing app-specific grammatical inflection.
 */
public class GrammaticalInflectionService extends SystemService {
    private final String TAG = "GrammaticalInflection";
    private final GrammaticalInflectionBackupHelper mBackupHelper;
    private final ActivityTaskManagerInternal mActivityTaskManagerInternal;
    private PackageManagerInternal mPackageManagerInternal;
    private static final String GRAMMATICAL_INFLECTION_ENABLED =
            "i18n.grammatical_Inflection.enabled";

    /**
     * Initializes the system service.
     * <p>
     * Subclasses must define a single argument constructor that accepts the context
     * and passes it to super.
     * </p>
     *
     * @param context The system server context.
     * @hide
     */
    public GrammaticalInflectionService(Context context) {
        super(context);
        mActivityTaskManagerInternal = LocalServices.getService(ActivityTaskManagerInternal.class);
        mPackageManagerInternal = LocalServices.getService(PackageManagerInternal.class);
        mBackupHelper = new GrammaticalInflectionBackupHelper(
                this, context.getPackageManager());
    }

    @Override
    public void onStart() {
        publishBinderService(Context.GRAMMATICAL_INFLECTION_SERVICE, mService);
        LocalServices.addService(GrammaticalInflectionManagerInternal.class,
                new GrammaticalInflectionManagerInternalImpl());
    }

    private final IBinder mService = new IGrammaticalInflectionManager.Stub() {
        @Override
        public void setRequestedApplicationGrammaticalGender(
                String appPackageName, int userId, int gender) {
            GrammaticalInflectionService.this.setRequestedApplicationGrammaticalGender(
                    appPackageName, userId, gender);
        }
    };

    private final class GrammaticalInflectionManagerInternalImpl
            extends GrammaticalInflectionManagerInternal {

        @Override
        @Nullable
        public byte[] getBackupPayload(int userId) {
            checkCallerIsSystem();
            return mBackupHelper.getBackupPayload(userId);
        }

        @Override
        public void stageAndApplyRestoredPayload(byte[] payload, int userId) {
            mBackupHelper.stageAndApplyRestoredPayload(payload, userId);
        }

        private void checkCallerIsSystem() {
            if (Binder.getCallingUid() != Process.SYSTEM_UID) {
                throw new SecurityException("Caller is not system.");
            }
        }
    }

    protected int getApplicationGrammaticalGender(String appPackageName, int userId) {
        final ActivityTaskManagerInternal.PackageConfig appConfig =
                mActivityTaskManagerInternal.getApplicationConfig(appPackageName, userId);

        if (appConfig == null || appConfig.mGrammaticalGender == null) {
            return GRAMMATICAL_GENDER_NOT_SPECIFIED;
        } else {
            return appConfig.mGrammaticalGender;
        }
    }

    protected void setRequestedApplicationGrammaticalGender(
            String appPackageName, int userId, int gender) {
        int preValue = getApplicationGrammaticalGender(appPackageName, userId);
        final ActivityTaskManagerInternal.PackageConfigurationUpdater updater =
                mActivityTaskManagerInternal.createPackageConfigurationUpdater(appPackageName,
                        userId);

        if (!SystemProperties.getBoolean(GRAMMATICAL_INFLECTION_ENABLED, true)) {
            if (preValue != GRAMMATICAL_GENDER_NOT_SPECIFIED) {
                Log.d(TAG, "Clearing the user's grammatical gender setting");
                updater.setGrammaticalGender(GRAMMATICAL_GENDER_NOT_SPECIFIED).commit();
            }
            return;
        }

        final int uid = mPackageManagerInternal.getPackageUid(appPackageName, 0, userId);
        FrameworkStatsLog.write(FrameworkStatsLog.GRAMMATICAL_INFLECTION_CHANGED,
                FrameworkStatsLog.APPLICATION_GRAMMATICAL_INFLECTION_CHANGED__SOURCE_ID__OTHERS,
                uid,
                gender != GRAMMATICAL_GENDER_NOT_SPECIFIED,
                preValue != GRAMMATICAL_GENDER_NOT_SPECIFIED);

        updater.setGrammaticalGender(gender).commit();
    }
}