| /* |
| * Copyright (C) 2013 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.print; |
| |
| import static com.android.internal.print.DumpUtils.writePrinterId; |
| import static com.android.internal.util.dump.DumpUtils.writeComponentName; |
| import static com.android.internal.util.function.pooled.PooledLambda.obtainMessage; |
| |
| import android.annotation.FloatRange; |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.annotation.StringRes; |
| import android.content.ComponentName; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.ServiceConnection; |
| import android.content.pm.ParceledListSlice; |
| import android.graphics.drawable.Icon; |
| import android.os.Binder; |
| import android.os.Handler; |
| import android.os.IBinder; |
| import android.os.IBinder.DeathRecipient; |
| import android.os.ParcelFileDescriptor; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.print.PrintJobId; |
| import android.print.PrintJobInfo; |
| import android.print.PrintManager; |
| import android.print.PrinterId; |
| import android.print.PrinterInfo; |
| import android.printservice.IPrintService; |
| import android.printservice.IPrintServiceClient; |
| import android.service.print.ActivePrintServiceProto; |
| import android.util.Slog; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.dump.DualDumpOutputStream; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * This class represents a remote print service. It abstracts away the binding |
| * and unbinding from the remote implementation. Clients can call methods of |
| * this class without worrying about when and how to bind/unbind. |
| */ |
| final class RemotePrintService implements DeathRecipient { |
| |
| private static final String LOG_TAG = "RemotePrintService"; |
| |
| private static final boolean DEBUG = false; |
| |
| private final Object mLock = new Object(); |
| |
| private final Context mContext; |
| |
| private final ComponentName mComponentName; |
| |
| private final Intent mIntent; |
| |
| private final RemotePrintSpooler mSpooler; |
| |
| private final PrintServiceCallbacks mCallbacks; |
| |
| private final int mUserId; |
| |
| private final List<Runnable> mPendingCommands = new ArrayList<Runnable>(); |
| |
| private final ServiceConnection mServiceConnection = new RemoteServiceConneciton(); |
| |
| private final RemotePrintServiceClient mPrintServiceClient; |
| |
| private IPrintService mPrintService; |
| |
| private boolean mBinding; |
| |
| private boolean mDestroyed; |
| |
| private boolean mHasActivePrintJobs; |
| |
| private boolean mHasPrinterDiscoverySession; |
| |
| private boolean mServiceDied; |
| |
| private List<PrinterId> mDiscoveryPriorityList; |
| |
| @GuardedBy("mLock") |
| private List<PrinterId> mTrackedPrinterList; |
| |
| public static interface PrintServiceCallbacks { |
| public void onPrintersAdded(List<PrinterInfo> printers); |
| public void onPrintersRemoved(List<PrinterId> printerIds); |
| public void onServiceDied(RemotePrintService service); |
| |
| /** |
| * Handle that a custom icon for a printer was loaded. |
| * |
| * @param printerId the id of the printer the icon belongs to |
| * @param icon the icon that was loaded |
| * @see android.print.PrinterInfo.Builder#setHasCustomPrinterIcon() |
| */ |
| public void onCustomPrinterIconLoaded(PrinterId printerId, Icon icon); |
| } |
| |
| public RemotePrintService(Context context, ComponentName componentName, int userId, |
| RemotePrintSpooler spooler, PrintServiceCallbacks callbacks) { |
| mContext = context; |
| mCallbacks = callbacks; |
| mComponentName = componentName; |
| mIntent = new Intent().setComponent(mComponentName); |
| mUserId = userId; |
| mSpooler = spooler; |
| mPrintServiceClient = new RemotePrintServiceClient(this); |
| } |
| |
| public ComponentName getComponentName() { |
| return mComponentName; |
| } |
| |
| public void destroy() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleDestroy, this)); |
| } |
| |
| private void handleDestroy() { |
| // Stop tracking printers. |
| stopTrackingAllPrinters(); |
| |
| // Stop printer discovery. |
| if (mDiscoveryPriorityList != null) { |
| handleStopPrinterDiscovery(); |
| } |
| |
| // Destroy the discovery session. |
| if (mHasPrinterDiscoverySession) { |
| handleDestroyPrinterDiscoverySession(); |
| } |
| |
| // Unbind. |
| ensureUnbound(); |
| |
| // Done |
| mDestroyed = true; |
| } |
| |
| @Override |
| public void binderDied() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleBinderDied, this)); |
| } |
| |
| private void handleBinderDied() { |
| if (mPrintService != null) { |
| mPrintService.asBinder().unlinkToDeath(this, 0); |
| } |
| |
| mPrintService = null; |
| mServiceDied = true; |
| mCallbacks.onServiceDied(this); |
| } |
| |
| public void onAllPrintJobsHandled() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleOnAllPrintJobsHandled, this)); |
| } |
| |
| private void handleOnAllPrintJobsHandled() { |
| mHasActivePrintJobs = false; |
| if (!isBound()) { |
| // The service is dead and neither has active jobs nor discovery |
| // session, so ensure we are unbound since the service has no work. |
| if (mServiceDied && !mHasPrinterDiscoverySession) { |
| ensureUnbound(); |
| return; |
| } |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleOnAllPrintJobsHandled(); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] onAllPrintJobsHandled()"); |
| } |
| // If the service has a printer discovery session |
| // created we should not disconnect from it just yet. |
| if (!mHasPrinterDiscoverySession) { |
| ensureUnbound(); |
| } |
| } |
| } |
| |
| public void onRequestCancelPrintJob(PrintJobInfo printJob) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleRequestCancelPrintJob, this, printJob)); |
| } |
| |
| private void handleRequestCancelPrintJob(final PrintJobInfo printJob) { |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleRequestCancelPrintJob(printJob); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] requestCancelPrintJob()"); |
| } |
| try { |
| mPrintService.requestCancelPrintJob(printJob); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error canceling a pring job.", re); |
| } |
| } |
| } |
| |
| public void onPrintJobQueued(PrintJobInfo printJob) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleOnPrintJobQueued, this, printJob)); |
| } |
| |
| private void handleOnPrintJobQueued(final PrintJobInfo printJob) { |
| mHasActivePrintJobs = true; |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleOnPrintJobQueued(printJob); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] onPrintJobQueued()"); |
| } |
| try { |
| mPrintService.onPrintJobQueued(printJob); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error announcing queued pring job.", re); |
| } |
| } |
| } |
| |
| public void createPrinterDiscoverySession() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleCreatePrinterDiscoverySession, this)); |
| } |
| |
| private void handleCreatePrinterDiscoverySession() { |
| mHasPrinterDiscoverySession = true; |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleCreatePrinterDiscoverySession(); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] createPrinterDiscoverySession()"); |
| } |
| try { |
| mPrintService.createPrinterDiscoverySession(); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error creating printer discovery session.", re); |
| } |
| } |
| } |
| |
| public void destroyPrinterDiscoverySession() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleDestroyPrinterDiscoverySession, this)); |
| } |
| |
| private void handleDestroyPrinterDiscoverySession() { |
| mHasPrinterDiscoverySession = false; |
| if (!isBound()) { |
| // The service is dead and neither has active jobs nor discovery |
| // session, so ensure we are unbound since the service has no work. |
| if (mServiceDied && !mHasActivePrintJobs) { |
| ensureUnbound(); |
| return; |
| } |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleDestroyPrinterDiscoverySession(); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] destroyPrinterDiscoverySession()"); |
| } |
| try { |
| mPrintService.destroyPrinterDiscoverySession(); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error destroying printer dicovery session.", re); |
| } |
| // If the service has no print jobs and no active discovery |
| // session anymore we should disconnect from it. |
| if (!mHasActivePrintJobs) { |
| ensureUnbound(); |
| } |
| } |
| } |
| |
| public void startPrinterDiscovery(List<PrinterId> priorityList) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleStartPrinterDiscovery, this, priorityList)); |
| } |
| |
| private void handleStartPrinterDiscovery(final List<PrinterId> priorityList) { |
| // Take a note that we are doing discovery. |
| mDiscoveryPriorityList = new ArrayList<PrinterId>(); |
| if (priorityList != null) { |
| mDiscoveryPriorityList.addAll(priorityList); |
| } |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleStartPrinterDiscovery(priorityList); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] startPrinterDiscovery()"); |
| } |
| try { |
| mPrintService.startPrinterDiscovery(priorityList); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error starting printer dicovery.", re); |
| } |
| } |
| } |
| |
| public void stopPrinterDiscovery() { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleStopPrinterDiscovery, this)); |
| } |
| |
| private void handleStopPrinterDiscovery() { |
| // We are not doing discovery anymore. |
| mDiscoveryPriorityList = null; |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleStopPrinterDiscovery(); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] stopPrinterDiscovery()"); |
| } |
| |
| // Stop tracking printers. |
| stopTrackingAllPrinters(); |
| |
| try { |
| mPrintService.stopPrinterDiscovery(); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error stopping printer discovery.", re); |
| } |
| } |
| } |
| |
| public void validatePrinters(List<PrinterId> printerIds) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleValidatePrinters, this, printerIds)); |
| } |
| |
| private void handleValidatePrinters(final List<PrinterId> printerIds) { |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleValidatePrinters(printerIds); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] validatePrinters()"); |
| } |
| try { |
| mPrintService.validatePrinters(printerIds); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error requesting printers validation.", re); |
| } |
| } |
| } |
| |
| public void startPrinterStateTracking(@NonNull PrinterId printerId) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleStartPrinterStateTracking, this, printerId)); |
| } |
| |
| /** |
| * Queue a request for a custom printer icon for a printer. |
| * |
| * @param printerId the id of the printer the icon should be loaded for |
| * @see android.print.PrinterInfo.Builder#setHasCustomPrinterIcon |
| */ |
| public void requestCustomPrinterIcon(@NonNull PrinterId printerId) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleRequestCustomPrinterIcon, this, printerId)); |
| } |
| |
| /** |
| * Request a custom printer icon for a printer. |
| * |
| * @param printerId the id of the printer the icon should be loaded for |
| * @see android.print.PrinterInfo.Builder#setHasCustomPrinterIcon |
| */ |
| private void handleRequestCustomPrinterIcon(@NonNull PrinterId printerId) { |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(() -> handleRequestCustomPrinterIcon(printerId)); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] requestCustomPrinterIcon()"); |
| } |
| |
| try { |
| mPrintService.requestCustomPrinterIcon(printerId); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error requesting icon for " + printerId, re); |
| } |
| } |
| } |
| |
| private void handleStartPrinterStateTracking(final @NonNull PrinterId printerId) { |
| synchronized (mLock) { |
| // Take a note we are tracking the printer. |
| if (mTrackedPrinterList == null) { |
| mTrackedPrinterList = new ArrayList<PrinterId>(); |
| } |
| mTrackedPrinterList.add(printerId); |
| } |
| |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleStartPrinterStateTracking(printerId); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] startPrinterTracking()"); |
| } |
| try { |
| mPrintService.startPrinterStateTracking(printerId); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error requesting start printer tracking.", re); |
| } |
| } |
| } |
| |
| public void stopPrinterStateTracking(PrinterId printerId) { |
| Handler.getMain().sendMessage(obtainMessage( |
| RemotePrintService::handleStopPrinterStateTracking, this, printerId)); |
| } |
| |
| private void handleStopPrinterStateTracking(final PrinterId printerId) { |
| synchronized (mLock) { |
| // We are no longer tracking the printer. |
| if (mTrackedPrinterList == null || !mTrackedPrinterList.remove(printerId)) { |
| return; |
| } |
| if (mTrackedPrinterList.isEmpty()) { |
| mTrackedPrinterList = null; |
| } |
| } |
| |
| if (!isBound()) { |
| ensureBound(); |
| mPendingCommands.add(new Runnable() { |
| @Override |
| public void run() { |
| handleStopPrinterStateTracking(printerId); |
| } |
| }); |
| } else { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] stopPrinterTracking()"); |
| } |
| try { |
| mPrintService.stopPrinterStateTracking(printerId); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error requesting stop printer tracking.", re); |
| } |
| } |
| } |
| |
| private void stopTrackingAllPrinters() { |
| synchronized (mLock) { |
| if (mTrackedPrinterList == null) { |
| return; |
| } |
| final int trackedPrinterCount = mTrackedPrinterList.size(); |
| for (int i = trackedPrinterCount - 1; i >= 0; i--) { |
| PrinterId printerId = mTrackedPrinterList.get(i); |
| if (printerId.getServiceName().equals(mComponentName)) { |
| handleStopPrinterStateTracking(printerId); |
| } |
| } |
| } |
| } |
| |
| public void dump(@NonNull DualDumpOutputStream proto) { |
| writeComponentName(proto, "component_name", ActivePrintServiceProto.COMPONENT_NAME, |
| mComponentName); |
| |
| proto.write("is_destroyed", ActivePrintServiceProto.IS_DESTROYED, mDestroyed); |
| proto.write("is_bound", ActivePrintServiceProto.IS_BOUND, isBound()); |
| proto.write("has_discovery_session", ActivePrintServiceProto.HAS_DISCOVERY_SESSION, |
| mHasPrinterDiscoverySession); |
| proto.write("has_active_print_jobs", ActivePrintServiceProto.HAS_ACTIVE_PRINT_JOBS, |
| mHasActivePrintJobs); |
| proto.write("is_discovering_printers", ActivePrintServiceProto.IS_DISCOVERING_PRINTERS, |
| mDiscoveryPriorityList != null); |
| |
| synchronized (mLock) { |
| if (mTrackedPrinterList != null) { |
| int numTrackedPrinters = mTrackedPrinterList.size(); |
| for (int i = 0; i < numTrackedPrinters; i++) { |
| writePrinterId(proto, "tracked_printers", |
| ActivePrintServiceProto.TRACKED_PRINTERS, mTrackedPrinterList.get(i)); |
| } |
| } |
| } |
| } |
| |
| private boolean isBound() { |
| return mPrintService != null; |
| } |
| |
| private void ensureBound() { |
| if (isBound() || mBinding) { |
| return; |
| } |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] ensureBound()"); |
| } |
| mBinding = true; |
| |
| boolean wasBound = mContext.bindServiceAsUser(mIntent, mServiceConnection, |
| Context.BIND_AUTO_CREATE | Context.BIND_FOREGROUND_SERVICE |
| | Context.BIND_INCLUDE_CAPABILITIES | Context.BIND_ALLOW_INSTANT, |
| new UserHandle(mUserId)); |
| |
| if (!wasBound) { |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] could not bind to " + mIntent); |
| } |
| mBinding = false; |
| |
| if (!mServiceDied) { |
| handleBinderDied(); |
| } |
| } |
| } |
| |
| private void ensureUnbound() { |
| if (!isBound() && !mBinding) { |
| return; |
| } |
| if (DEBUG) { |
| Slog.i(LOG_TAG, "[user: " + mUserId + "] ensureUnbound()"); |
| } |
| mBinding = false; |
| mPendingCommands.clear(); |
| mHasActivePrintJobs = false; |
| mHasPrinterDiscoverySession = false; |
| mDiscoveryPriorityList = null; |
| |
| synchronized (mLock) { |
| mTrackedPrinterList = null; |
| } |
| |
| if (isBound()) { |
| try { |
| mPrintService.setClient(null); |
| } catch (RemoteException re) { |
| /* ignore */ |
| } |
| mPrintService.asBinder().unlinkToDeath(this, 0); |
| mPrintService = null; |
| mContext.unbindService(mServiceConnection); |
| } |
| } |
| |
| private class RemoteServiceConneciton implements ServiceConnection { |
| @Override |
| public void onServiceConnected(ComponentName name, IBinder service) { |
| if (mDestroyed || !mBinding) { |
| mContext.unbindService(mServiceConnection); |
| return; |
| } |
| mBinding = false; |
| mPrintService = IPrintService.Stub.asInterface(service); |
| try { |
| service.linkToDeath(RemotePrintService.this, 0); |
| } catch (RemoteException re) { |
| handleBinderDied(); |
| return; |
| } |
| try { |
| mPrintService.setClient(mPrintServiceClient); |
| } catch (RemoteException re) { |
| Slog.e(LOG_TAG, "Error setting client for: " + service, re); |
| handleBinderDied(); |
| return; |
| } |
| // If the service died and there is a discovery session, recreate it. |
| if (mServiceDied && mHasPrinterDiscoverySession) { |
| handleCreatePrinterDiscoverySession(); |
| } |
| // If the service died and there is discovery started, restart it. |
| if (mServiceDied && mDiscoveryPriorityList != null) { |
| handleStartPrinterDiscovery(mDiscoveryPriorityList); |
| } |
| synchronized (mLock) { |
| // If the service died and printers were tracked, start tracking. |
| if (mServiceDied && mTrackedPrinterList != null) { |
| final int trackedPrinterCount = mTrackedPrinterList.size(); |
| for (int i = 0; i < trackedPrinterCount; i++) { |
| handleStartPrinterStateTracking(mTrackedPrinterList.get(i)); |
| } |
| } |
| } |
| // Finally, do all the pending work. |
| while (!mPendingCommands.isEmpty()) { |
| Runnable pendingCommand = mPendingCommands.remove(0); |
| pendingCommand.run(); |
| } |
| // We did a best effort to get to the last state if we crashed. |
| // If we do not have print jobs and no discovery is in progress, |
| // then no need to be bound. |
| if (!mHasPrinterDiscoverySession && !mHasActivePrintJobs) { |
| ensureUnbound(); |
| } |
| mServiceDied = false; |
| } |
| |
| @Override |
| public void onServiceDisconnected(ComponentName name) { |
| mBinding = true; |
| } |
| } |
| |
| private static final class RemotePrintServiceClient extends IPrintServiceClient.Stub { |
| private final WeakReference<RemotePrintService> mWeakService; |
| |
| public RemotePrintServiceClient(RemotePrintService service) { |
| mWeakService = new WeakReference<RemotePrintService>(service); |
| } |
| |
| @Override |
| public List<PrintJobInfo> getPrintJobInfos() { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return service.mSpooler.getPrintJobInfos(service.mComponentName, |
| PrintJobInfo.STATE_ANY_SCHEDULED, PrintManager.APP_ID_ANY); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public PrintJobInfo getPrintJobInfo(PrintJobId printJobId) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return service.mSpooler.getPrintJobInfo(printJobId, |
| PrintManager.APP_ID_ANY); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public boolean setPrintJobState(PrintJobId printJobId, int state, String error) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return service.mSpooler.setPrintJobState(printJobId, state, error); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean setPrintJobTag(PrintJobId printJobId, String tag) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| return service.mSpooler.setPrintJobTag(printJobId, tag); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public void writePrintJobData(ParcelFileDescriptor fd, PrintJobId printJobId) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mSpooler.writePrintJobData(fd, printJobId); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| public void setProgress(@NonNull PrintJobId printJobId, |
| @FloatRange(from=0.0, to=1.0) float progress) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mSpooler.setProgress(printJobId, progress); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| public void setStatus(@NonNull PrintJobId printJobId, @Nullable CharSequence status) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mSpooler.setStatus(printJobId, status); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| public void setStatusRes(@NonNull PrintJobId printJobId, @StringRes int status, |
| @NonNull CharSequence appPackageName) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mSpooler.setStatus(printJobId, status, appPackageName); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| public void onPrintersAdded(ParceledListSlice printers) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| List<PrinterInfo> addedPrinters = (List<PrinterInfo>) printers.getList(); |
| throwIfPrinterIdsForPrinterInfoTampered(service.mComponentName, addedPrinters); |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mCallbacks.onPrintersAdded(addedPrinters); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| @Override |
| @SuppressWarnings({"rawtypes", "unchecked"}) |
| public void onPrintersRemoved(ParceledListSlice printerIds) { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| List<PrinterId> removedPrinterIds = (List<PrinterId>) printerIds.getList(); |
| throwIfPrinterIdsTampered(service.mComponentName, removedPrinterIds); |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mCallbacks.onPrintersRemoved(removedPrinterIds); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| |
| private void throwIfPrinterIdsForPrinterInfoTampered(ComponentName serviceName, |
| List<PrinterInfo> printerInfos) { |
| final int printerInfoCount = printerInfos.size(); |
| for (int i = 0; i < printerInfoCount; i++) { |
| PrinterId printerId = printerInfos.get(i).getId(); |
| throwIfPrinterIdTampered(serviceName, printerId); |
| } |
| } |
| |
| private void throwIfPrinterIdsTampered(ComponentName serviceName, |
| List<PrinterId> printerIds) { |
| final int printerIdCount = printerIds.size(); |
| for (int i = 0; i < printerIdCount; i++) { |
| PrinterId printerId = printerIds.get(i); |
| throwIfPrinterIdTampered(serviceName, printerId); |
| } |
| } |
| |
| private void throwIfPrinterIdTampered(ComponentName serviceName, PrinterId printerId) { |
| if (printerId == null || !printerId.getServiceName().equals(serviceName)) { |
| throw new IllegalArgumentException("Invalid printer id: " + printerId); |
| } |
| } |
| |
| @Override |
| public void onCustomPrinterIconLoaded(PrinterId printerId, Icon icon) |
| throws RemoteException { |
| RemotePrintService service = mWeakService.get(); |
| if (service != null) { |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| service.mCallbacks.onCustomPrinterIconLoaded(printerId, icon); |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| } |
| } |
| } |
