d8f391b4e0
The user has to explicitly enable a print service from the settings UI before using it. Usually, users very rarely if at all interact with print services, therefore all print service management task are performed from the print settings. We also have to get user consent warning that the user's data is about to be given to a third-party app. We now post a notification allowing the user to go directly to the settings screen to turn the service on. bug:10447510 Change-Id: Iea56c0825f0bf38328ad94912f0ea5576e9339b3
578 lines
23 KiB
Java
578 lines
23 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.print;
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import android.Manifest;
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import android.app.Notification;
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import android.app.NotificationManager;
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import android.app.PendingIntent;
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import android.content.BroadcastReceiver;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.IntentFilter;
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import android.content.pm.PackageManager;
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import android.content.pm.ResolveInfo;
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import android.content.pm.ServiceInfo;
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import android.database.ContentObserver;
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import android.net.Uri;
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import android.os.Binder;
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import android.os.Process;
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import android.os.UserHandle;
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import android.print.IPrintClient;
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import android.print.IPrintDocumentAdapter;
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import android.print.IPrintManager;
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import android.print.IPrinterDiscoveryObserver;
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import android.print.PrintAttributes;
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import android.print.PrintJobId;
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import android.print.PrintJobInfo;
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import android.print.PrinterId;
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import android.printservice.PrintServiceInfo;
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import android.provider.Settings;
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import android.util.SparseArray;
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import com.android.internal.R;
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import com.android.internal.content.PackageMonitor;
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import com.android.internal.os.BackgroundThread;
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import java.io.FileDescriptor;
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import java.io.PrintWriter;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Set;
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public final class PrintManagerService extends IPrintManager.Stub {
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private static final char COMPONENT_NAME_SEPARATOR = ':';
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private static final String EXTRA_PRINT_SERVICE_COMPONENT_NAME =
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"EXTRA_PRINT_SERVICE_COMPONENT_NAME";
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private final Object mLock = new Object();
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private final Context mContext;
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private final SparseArray<UserState> mUserStates = new SparseArray<UserState>();
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private int mCurrentUserId = UserHandle.USER_OWNER;
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public PrintManagerService(Context context) {
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mContext = context;
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registerContentObservers();
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registerBoradcastReceivers();
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}
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public void systemRuning() {
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BackgroundThread.getHandler().post(new Runnable() {
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@Override
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public void run() {
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final UserState userState;
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synchronized (mLock) {
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userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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}
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// This is the first time we switch to this user after boot, so
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// now is the time to remove obsolete print jobs since they
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// are from the last boot and no application would query them.
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userState.removeObsoletePrintJobs();
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}
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});
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}
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@Override
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public PrintJobInfo print(String printJobName, final IPrintClient client,
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final IPrintDocumentAdapter documentAdapter, PrintAttributes attributes,
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int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return userState.print(printJobName, client, documentAdapter,
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attributes, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public List<PrintJobInfo> getPrintJobInfos(int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return userState.getPrintJobInfos(resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public PrintJobInfo getPrintJobInfo(PrintJobId printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return userState.getPrintJobInfo(printJobId, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void cancelPrintJob(PrintJobId printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.cancelPrintJob(printJobId, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void restartPrintJob(PrintJobId printJobId, int appId, int userId) {
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final int resolvedAppId = resolveCallingAppEnforcingPermissions(appId);
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.restartPrintJob(printJobId, resolvedAppId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public List<PrintServiceInfo> getEnabledPrintServices(int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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return userState.getEnabledPrintServices();
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void createPrinterDiscoverySession(IPrinterDiscoveryObserver observer,
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int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.createPrinterDiscoverySession(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void destroyPrinterDiscoverySession(IPrinterDiscoveryObserver observer,
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int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.destroyPrinterDiscoverySession(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void startPrinterDiscovery(IPrinterDiscoveryObserver observer,
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List<PrinterId> priorityList, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.startPrinterDiscovery(observer, priorityList);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void stopPrinterDiscovery(IPrinterDiscoveryObserver observer, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.stopPrinterDiscovery(observer);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void validatePrinters(List<PrinterId> printerIds, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.validatePrinters(printerIds);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void startPrinterStateTracking(PrinterId printerId, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.startPrinterStateTracking(printerId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void stopPrinterStateTracking(PrinterId printerId, int userId) {
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final int resolvedUserId = resolveCallingUserEnforcingPermissions(userId);
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final UserState userState;
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synchronized (mLock) {
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userState = getOrCreateUserStateLocked(resolvedUserId);
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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userState.stopPrinterStateTracking(printerId);
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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@Override
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public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
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if (mContext.checkCallingOrSelfPermission(Manifest.permission.DUMP)
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!= PackageManager.PERMISSION_GRANTED) {
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pw.println("Permission Denial: can't dump PrintManager from from pid="
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+ Binder.getCallingPid()
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+ ", uid=" + Binder.getCallingUid());
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return;
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}
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synchronized (mLock) {
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pw.println("PRINT MANAGER STATE (dumpsys print)");
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final int userStateCount = mUserStates.size();
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for (int i = 0; i < userStateCount; i++) {
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UserState userState = mUserStates.get(i);
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userState.dump(fd, pw, "");
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pw.println();
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}
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}
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}
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private void registerContentObservers() {
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final Uri enabledPrintServicesUri = Settings.Secure.getUriFor(
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Settings.Secure.ENABLED_PRINT_SERVICES);
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ContentObserver observer = new ContentObserver(BackgroundThread.getHandler()) {
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@Override
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public void onChange(boolean selfChange, Uri uri) {
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if (enabledPrintServicesUri.equals(uri)) {
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synchronized (mLock) {
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UserState userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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}
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}
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}
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};
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mContext.getContentResolver().registerContentObserver(enabledPrintServicesUri,
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false, observer, UserHandle.USER_ALL);
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}
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private void registerBoradcastReceivers() {
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PackageMonitor monitor = new PackageMonitor() {
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@Override
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public boolean onPackageChanged(String packageName, int uid, String[] components) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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if (packageName.equals(componentName.getPackageName())) {
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userState.updateIfNeededLocked();
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return true;
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}
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}
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}
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return false;
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}
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@Override
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public void onPackageRemoved(String packageName, int uid) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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if (packageName.equals(componentName.getPackageName())) {
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iterator.remove();
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persistComponentNamesToSettingLocked(
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Settings.Secure.ENABLED_PRINT_SERVICES,
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userState.getEnabledServices(), getChangingUserId());
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userState.updateIfNeededLocked();
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return;
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}
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}
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}
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}
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@Override
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public boolean onHandleForceStop(Intent intent, String[] stoppedPackages,
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int uid, boolean doit) {
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synchronized (mLock) {
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UserState userState = getOrCreateUserStateLocked(getChangingUserId());
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boolean stoppedSomePackages = false;
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Iterator<ComponentName> iterator = userState.getEnabledServices().iterator();
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while (iterator.hasNext()) {
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ComponentName componentName = iterator.next();
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String componentPackage = componentName.getPackageName();
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for (String stoppedPackage : stoppedPackages) {
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if (componentPackage.equals(stoppedPackage)) {
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if (!doit) {
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return true;
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}
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stoppedSomePackages = true;
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break;
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}
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}
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}
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if (stoppedSomePackages) {
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userState.updateIfNeededLocked();
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}
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return false;
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}
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}
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@Override
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public void onPackageAdded(String packageName, int uid) {
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Intent intent = new Intent(android.printservice.PrintService.SERVICE_INTERFACE);
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intent.setPackage(packageName);
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List<ResolveInfo> installedServices = mContext.getPackageManager()
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.queryIntentServicesAsUser(intent, PackageManager.GET_SERVICES,
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getChangingUserId());
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final int installedServiceCount = installedServices.size();
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for (int i = 0; i < installedServiceCount; i++) {
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ServiceInfo serviceInfo = installedServices.get(i).serviceInfo;
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ComponentName component = new ComponentName(serviceInfo.packageName,
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serviceInfo.name);
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String label = serviceInfo.loadLabel(mContext.getPackageManager()).toString();
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showEnableInstalledPrintServiceNotification(component, label);
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}
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}
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private void persistComponentNamesToSettingLocked(String settingName,
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Set<ComponentName> componentNames, int userId) {
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StringBuilder builder = new StringBuilder();
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for (ComponentName componentName : componentNames) {
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if (builder.length() > 0) {
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builder.append(COMPONENT_NAME_SEPARATOR);
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}
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builder.append(componentName.flattenToShortString());
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}
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Settings.Secure.putStringForUser(mContext.getContentResolver(),
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settingName, builder.toString(), userId);
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}
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};
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// package changes
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monitor.register(mContext, BackgroundThread.getHandler().getLooper(),
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UserHandle.ALL, true);
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// user changes
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IntentFilter intentFilter = new IntentFilter();
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intentFilter.addAction(Intent.ACTION_USER_SWITCHED);
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intentFilter.addAction(Intent.ACTION_USER_REMOVED);
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mContext.registerReceiverAsUser(new BroadcastReceiver() {
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@Override
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public void onReceive(Context context, Intent intent) {
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String action = intent.getAction();
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if (Intent.ACTION_USER_SWITCHED.equals(action)) {
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switchUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0));
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} else if (Intent.ACTION_USER_REMOVED.equals(action)) {
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removeUser(intent.getIntExtra(Intent.EXTRA_USER_HANDLE, 0));
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}
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}
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}, UserHandle.ALL, intentFilter, null, BackgroundThread.getHandler());
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}
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private UserState getCurrentUserStateLocked() {
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return getOrCreateUserStateLocked(mCurrentUserId);
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}
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private UserState getOrCreateUserStateLocked(int userId) {
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UserState userState = mUserStates.get(userId);
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if (userState == null) {
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userState = new UserState(mContext, userId, mLock);
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mUserStates.put(userId, userState);
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}
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return userState;
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}
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private void switchUser(int newUserId) {
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UserState userState;
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synchronized (mLock) {
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if (newUserId == mCurrentUserId) {
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return;
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}
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mCurrentUserId = newUserId;
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userState = mUserStates.get(mCurrentUserId);
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if (userState == null) {
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userState = getCurrentUserStateLocked();
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userState.updateIfNeededLocked();
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} else {
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userState.updateIfNeededLocked();
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}
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}
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// This is the first time we switch to this user after boot, so
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// now is the time to remove obsolete print jobs since they
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// are from the last boot and no application would query them.
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userState.removeObsoletePrintJobs();
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}
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private void removeUser(int removedUserId) {
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synchronized (mLock) {
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UserState userState = mUserStates.get(removedUserId);
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if (userState != null) {
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userState.destroyLocked();
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mUserStates.remove(removedUserId);
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}
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}
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}
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private int resolveCallingAppEnforcingPermissions(int appId) {
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final int callingUid = Binder.getCallingUid();
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if (callingUid == 0 || callingUid == Process.SYSTEM_UID
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|| callingUid == Process.SHELL_UID) {
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return appId;
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}
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final int callingAppId = UserHandle.getAppId(callingUid);
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if (appId == callingAppId) {
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return appId;
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}
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if (mContext.checkCallingPermission(
|
|
"com.android.printspooler.permission.ACCESS_ALL_PRINT_JOBS")
|
|
!= PackageManager.PERMISSION_GRANTED) {
|
|
throw new SecurityException("Call from app " + callingAppId + " as app "
|
|
+ appId + " without com.android.printspooler.permission"
|
|
+ ".ACCESS_ALL_PRINT_JOBS");
|
|
}
|
|
return appId;
|
|
}
|
|
|
|
private int resolveCallingUserEnforcingPermissions(int userId) {
|
|
final int callingUid = Binder.getCallingUid();
|
|
if (callingUid == 0 || callingUid == Process.SYSTEM_UID
|
|
|| callingUid == Process.SHELL_UID) {
|
|
return userId;
|
|
}
|
|
final int callingUserId = UserHandle.getUserId(callingUid);
|
|
if (callingUserId == userId) {
|
|
return userId;
|
|
}
|
|
if (mContext.checkCallingPermission(Manifest.permission.INTERACT_ACROSS_USERS_FULL)
|
|
!= PackageManager.PERMISSION_GRANTED
|
|
|| mContext.checkCallingPermission(Manifest.permission.INTERACT_ACROSS_USERS)
|
|
!= PackageManager.PERMISSION_GRANTED) {
|
|
if (userId == UserHandle.USER_CURRENT_OR_SELF) {
|
|
return callingUserId;
|
|
}
|
|
throw new SecurityException("Call from user " + callingUserId + " as user "
|
|
+ userId + " without permission INTERACT_ACROSS_USERS or "
|
|
+ "INTERACT_ACROSS_USERS_FULL not allowed.");
|
|
}
|
|
if (userId == UserHandle.USER_CURRENT || userId == UserHandle.USER_CURRENT_OR_SELF) {
|
|
return mCurrentUserId;
|
|
}
|
|
throw new IllegalArgumentException("Calling user can be changed to only "
|
|
+ "UserHandle.USER_CURRENT or UserHandle.USER_CURRENT_OR_SELF.");
|
|
}
|
|
|
|
private void showEnableInstalledPrintServiceNotification(ComponentName component,
|
|
String label) {
|
|
Intent intent = new Intent(Settings.ACTION_PRINT_SETTINGS);
|
|
intent.putExtra(EXTRA_PRINT_SERVICE_COMPONENT_NAME, component.flattenToString());
|
|
|
|
PendingIntent pendingIntent = PendingIntent.getActivity(mContext, 0, intent,
|
|
PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_CANCEL_CURRENT, null);
|
|
|
|
Notification.Builder builder = new Notification.Builder(mContext)
|
|
.setSmallIcon(R.drawable.ic_print)
|
|
.setContentTitle(mContext.getString(R.string.print_service_installed_title, label))
|
|
.setContentText(mContext.getString(R.string.print_service_installed_message))
|
|
.setContentIntent(pendingIntent)
|
|
.setWhen(System.currentTimeMillis())
|
|
.setAutoCancel(true)
|
|
.setShowWhen(true);
|
|
|
|
NotificationManager notificationManager = (NotificationManager) mContext
|
|
.getSystemService(Context.NOTIFICATION_SERVICE);
|
|
|
|
String notificationTag = getClass().getName() + ":" + component.flattenToString();
|
|
notificationManager.notify(notificationTag, 0, builder.build());
|
|
}
|
|
}
|