| /* |
| * Copyright (C) 2020 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.location; |
| |
| import android.annotation.Nullable; |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManager; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.UserInfo; |
| import android.os.Binder; |
| import android.os.Build; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.ArrayUtils; |
| import com.android.internal.util.Preconditions; |
| import com.android.server.FgThread; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.Arrays; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| /** |
| * Provides accessors and listeners for all user info. |
| */ |
| public class UserInfoStore { |
| |
| /** |
| * Listener for current user changes. |
| */ |
| public interface UserChangedListener { |
| /** |
| * Called when the current user changes. |
| */ |
| void onUserChanged(@UserIdInt int oldUserId, @UserIdInt int newUserId); |
| } |
| |
| private final Context mContext; |
| private final CopyOnWriteArrayList<UserChangedListener> mListeners; |
| |
| @GuardedBy("this") |
| @Nullable |
| private UserManager mUserManager; |
| |
| @GuardedBy("this") |
| @UserIdInt |
| private int mCurrentUserId; |
| |
| @GuardedBy("this") |
| @UserIdInt |
| private int mCachedParentUserId; |
| @GuardedBy("this") |
| private int[] mCachedProfileUserIds; |
| |
| public UserInfoStore(Context context) { |
| mContext = context; |
| mListeners = new CopyOnWriteArrayList<>(); |
| |
| mCurrentUserId = UserHandle.USER_NULL; |
| mCachedParentUserId = UserHandle.USER_NULL; |
| mCachedProfileUserIds = new int[]{UserHandle.USER_NULL}; |
| } |
| |
| /** Called when system is ready. */ |
| public synchronized void onSystemReady() { |
| if (mUserManager != null) { |
| return; |
| } |
| |
| mUserManager = mContext.getSystemService(UserManager.class); |
| |
| IntentFilter intentFilter = new IntentFilter(); |
| intentFilter.addAction(Intent.ACTION_USER_SWITCHED); |
| intentFilter.addAction(Intent.ACTION_MANAGED_PROFILE_ADDED); |
| intentFilter.addAction(Intent.ACTION_MANAGED_PROFILE_REMOVED); |
| |
| mContext.registerReceiverAsUser(new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| String action = intent.getAction(); |
| if (action == null) { |
| return; |
| } |
| switch (action) { |
| case Intent.ACTION_USER_SWITCHED: |
| int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, |
| UserHandle.USER_NULL); |
| if (userId != UserHandle.USER_NULL) { |
| onUserChanged(userId); |
| } |
| break; |
| case Intent.ACTION_MANAGED_PROFILE_ADDED: |
| case Intent.ACTION_MANAGED_PROFILE_REMOVED: |
| onUserProfilesChanged(); |
| break; |
| } |
| } |
| }, UserHandle.ALL, intentFilter, null, FgThread.getHandler()); |
| |
| mCurrentUserId = ActivityManager.getCurrentUser(); |
| } |
| |
| /** |
| * Adds a listener for user changed events. |
| */ |
| public void addListener(UserChangedListener listener) { |
| mListeners.add(listener); |
| } |
| |
| /** |
| * Removes a listener for user changed events. |
| */ |
| public void removeListener(UserChangedListener listener) { |
| mListeners.remove(listener); |
| } |
| |
| private void onUserChanged(@UserIdInt int newUserId) { |
| int oldUserId; |
| synchronized (this) { |
| if (newUserId == mCurrentUserId) { |
| return; |
| } |
| |
| oldUserId = mCurrentUserId; |
| mCurrentUserId = newUserId; |
| } |
| |
| for (UserChangedListener listener : mListeners) { |
| listener.onUserChanged(oldUserId, newUserId); |
| } |
| } |
| |
| private synchronized void onUserProfilesChanged() { |
| // this intent is only sent to the current user |
| if (mCachedParentUserId == mCurrentUserId) { |
| mCachedParentUserId = UserHandle.USER_NULL; |
| mCachedProfileUserIds = new int[]{UserHandle.USER_NULL}; |
| } |
| } |
| |
| /** |
| * Returns the user id of the current user. |
| */ |
| @UserIdInt |
| public synchronized int getCurrentUserId() { |
| return mCurrentUserId; |
| } |
| |
| /** |
| * Returns true if the given user id is either the current user or a profile of the current |
| * user. |
| */ |
| public synchronized boolean isCurrentUserOrProfile(@UserIdInt int userId) { |
| return userId == mCurrentUserId || ArrayUtils.contains( |
| getProfileUserIdsForParentUser(mCurrentUserId), userId); |
| } |
| |
| /** |
| * Returns the parent user id of the given user id, or the user id itself if the user id either |
| * is a parent or has no profiles. |
| */ |
| @UserIdInt |
| public synchronized int getParentUserId(@UserIdInt int userId) { |
| int parentUserId; |
| if (userId == mCachedParentUserId || ArrayUtils.contains(mCachedProfileUserIds, userId)) { |
| parentUserId = mCachedParentUserId; |
| } else { |
| Preconditions.checkState(mUserManager != null); |
| |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| UserInfo userInfo = mUserManager.getProfileParent(userId); |
| if (userInfo != null) { |
| parentUserId = userInfo.id; |
| } else { |
| // getProfileParent() returns null if the userId is already the parent... |
| parentUserId = userId; |
| } |
| |
| // force profiles into cache |
| getProfileUserIdsForParentUser(parentUserId); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| return parentUserId; |
| } |
| |
| @GuardedBy("this") |
| private int[] getProfileUserIdsForParentUser(@UserIdInt int parentUserId) { |
| Preconditions.checkState(mUserManager != null); |
| |
| // only assert on debug builds as this is a more expensive check |
| if (Build.IS_DEBUGGABLE) { |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| Preconditions.checkArgument(mUserManager.getProfileParent(parentUserId) == null); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| if (parentUserId != mCachedParentUserId) { |
| long identity = Binder.clearCallingIdentity(); |
| try { |
| mCachedParentUserId = parentUserId; |
| mCachedProfileUserIds = mUserManager.getProfileIdsWithDisabled(parentUserId); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| return mCachedProfileUserIds; |
| } |
| |
| /** |
| * Dump info for debugging. |
| */ |
| public synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println("Current User: " + mCurrentUserId + " " + Arrays.toString( |
| getProfileUserIdsForParentUser(mCurrentUserId))); |
| } |
| } |