773f54de3d
1. Removed the updatePrinters API on PrinterDiscoverySession. Now re-adding a printer updates it. 2. Added getTrackedPrinters() API to allow a print service to figure out which printers' state should be tracked by the service. 3. Removed the APIs on PrintDocumentInfo that describe the layout of the content as they are not needed. For example, if the print attributes passed in layout require landscape mode, the the app should just create a PDF page with the wider side up and draw its content in portrait. The printer will then rotate the page. Change-Id: Idd72c6e9c129e8b17eef1236573a99773f8ff0a2
713 lines
24 KiB
Java
713 lines
24 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.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.ServiceConnection;
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import android.os.Binder;
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import android.os.Build;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.IBinder.DeathRecipient;
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import android.os.AsyncTask;
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import android.os.Looper;
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import android.os.Message;
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import android.os.ParcelFileDescriptor;
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import android.os.RemoteException;
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import android.os.UserHandle;
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import android.print.PrintJobInfo;
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import android.print.PrintManager;
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import android.print.PrinterId;
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import android.print.PrinterInfo;
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import android.printservice.IPrintService;
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import android.printservice.IPrintServiceClient;
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import android.util.Slog;
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import com.android.internal.R;
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import java.lang.ref.WeakReference;
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import java.util.ArrayList;
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import java.util.List;
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/**
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* This class represents a remote print service. It abstracts away the binding
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* and unbinding from the remote implementation. Clients can call methods of
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* this class without worrying about when and how to bind/unbind.
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*/
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final class RemotePrintService implements DeathRecipient {
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private static final String LOG_TAG = "RemotePrintService";
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private static final boolean DEBUG = true && Build.IS_DEBUGGABLE;
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private final Context mContext;
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private final ComponentName mComponentName;
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private final Intent mIntent;
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private final RemotePrintSpooler mSpooler;
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private final UserState mUserState;
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private final int mUserId;
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private final List<Runnable> mPendingCommands = new ArrayList<Runnable>();
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private final ServiceConnection mServiceConnection = new RemoteServiceConneciton();
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private final RemotePrintServiceClient mPrintServiceClient;
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private final Handler mHandler;
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private IPrintService mPrintService;
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private boolean mBinding;
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private boolean mDestroyed;
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private boolean mAllPrintJobsHandled;
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private boolean mHasPrinterDiscoverySession;
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public RemotePrintService(Context context, ComponentName componentName, int userId,
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RemotePrintSpooler spooler, UserState userState) {
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mContext = context;
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mUserState = userState;
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mComponentName = componentName;
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mIntent = new Intent().setComponent(mComponentName);
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mUserId = userId;
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mSpooler = spooler;
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mHandler = new MyHandler(context.getMainLooper());
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mPrintServiceClient = new RemotePrintServiceClient(this);
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}
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public void destroy() {
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mHandler.sendEmptyMessage(MyHandler.MSG_DESTROY);
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}
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private void handleDestroy() {
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throwIfDestroyed();
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ensureUnbound();
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mAllPrintJobsHandled = false;
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mHasPrinterDiscoverySession = false;
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mDestroyed = true;
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}
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public void onAllPrintJobsHandled() {
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mHandler.sendEmptyMessage(MyHandler.MSG_ON_ALL_PRINT_JOBS_HANDLED);
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}
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@Override
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public void binderDied() {
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mHandler.sendEmptyMessage(MyHandler.MSG_BINDER_DIED);
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}
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private void handleBinderDied() {
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mAllPrintJobsHandled = false;
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mHasPrinterDiscoverySession = false;
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mPendingCommands.clear();
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ensureUnbound();
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// Makes sure all active print jobs are failed since the service
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// just died. Do this off the main thread since we do to allow
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// calls into the spooler on the main thread.
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new AsyncTask<Void, Void, Void>() {
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@Override
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protected Void doInBackground(Void... params) {
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failAllActivePrintJobs();
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return null;
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}
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}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
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}
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private void failAllActivePrintJobs() {
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List<PrintJobInfo> printJobs = mSpooler.getPrintJobInfos(mComponentName,
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PrintJobInfo.STATE_ANY_ACTIVE, PrintManager.APP_ID_ANY);
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if (printJobs == null) {
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return;
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}
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final long identity = Binder.clearCallingIdentity();
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try {
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final int printJobCount = printJobs.size();
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for (int i = 0; i < printJobCount; i++) {
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PrintJobInfo printJob = printJobs.get(i);
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mSpooler.setPrintJobState(printJob.getId(), PrintJobInfo.STATE_FAILED,
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mContext.getString(R.string.reason_unknown));
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}
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} finally {
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Binder.restoreCallingIdentity(identity);
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}
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}
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private void handleOnAllPrintJobsHandled() {
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throwIfDestroyed();
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mAllPrintJobsHandled = true;
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if (isBound()) {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] onAllPrintJobsHandled()");
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}
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// If the service has a printer discovery session
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// created we should not disconnect from it just yet.
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if (!mHasPrinterDiscoverySession) {
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ensureUnbound();
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}
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}
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}
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public void onRequestCancelPrintJob(PrintJobInfo printJob) {
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mHandler.obtainMessage(MyHandler.MSG_ON_REQUEST_CANCEL_PRINT_JOB,
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printJob).sendToTarget();
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}
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private void handleRequestCancelPrintJob(final PrintJobInfo printJob) {
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throwIfDestroyed();
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// If we are not bound, then we have no print jobs to handle
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// which means that there are no print jobs to be cancelled.
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if (isBound()) {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] requestCancelPrintJob()");
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}
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try {
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mPrintService.requestCancelPrintJob(printJob);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error canceling a pring job.", re);
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}
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}
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}
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public void onPrintJobQueued(PrintJobInfo printJob) {
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mHandler.obtainMessage(MyHandler.MSG_ON_PRINT_JOB_QUEUED,
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printJob).sendToTarget();
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}
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private void handleOnPrintJobQueued(final PrintJobInfo printJob) {
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throwIfDestroyed();
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mAllPrintJobsHandled = false;
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleOnPrintJobQueued(printJob);
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] onPrintJobQueued()");
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}
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try {
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mPrintService.onPrintJobQueued(printJob);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error announcing queued pring job.", re);
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}
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}
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}
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public void createPrinterDiscoverySession() {
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mHandler.sendEmptyMessage(MyHandler.MSG_CREATE_PRINTER_DISCOVERY_SESSION);
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}
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private void handleCreatePrinterDiscoverySession() {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleCreatePrinterDiscoverySession();
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] createPrinterDiscoverySession()");
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}
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try {
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mPrintService.createPrinterDiscoverySession();
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error creating printer dicovery session.", re);
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}
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mHasPrinterDiscoverySession = true;
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}
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}
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public void destroyPrinterDiscoverySession() {
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mHandler.sendEmptyMessage(MyHandler.MSG_DESTROY_PRINTER_DISCOVERY_SESSION);
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}
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private void handleDestroyPrinterDiscoverySession() {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleDestroyPrinterDiscoverySession();
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] destroyPrinterDiscoverySession()");
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}
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mHasPrinterDiscoverySession = false;
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try {
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mPrintService.destroyPrinterDiscoverySession();
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error destroying printer dicovery session.", re);
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}
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// If the service has no print jobs and no active discovery
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// session anymore we should disconnect from it.
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if (mAllPrintJobsHandled) {
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ensureUnbound();
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}
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}
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}
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public void startPrinterDiscovery(List<PrinterId> priorityList) {
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mHandler.obtainMessage(MyHandler.MSG_START_PRINTER_DISCOVERY,
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priorityList).sendToTarget();
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}
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private void handleStartPrinterDiscovery(final List<PrinterId> priorityList) {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleStartPrinterDiscovery(priorityList);
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] startPrinterDiscovery()");
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}
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try {
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mPrintService.startPrinterDiscovery(priorityList);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error starting printer dicovery.", re);
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}
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}
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}
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public void stopPrinterDiscovery() {
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mHandler.sendEmptyMessage(MyHandler.MSG_STOP_PRINTER_DISCOVERY);
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}
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private void handleStopPrinterDiscovery() {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleStopPrinterDiscovery();
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] stopPrinterDiscovery()");
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}
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try {
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mPrintService.stopPrinterDiscovery();
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error stopping printer dicovery.", re);
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}
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}
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}
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public void validatePrinters(List<PrinterId> printerIds) {
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mHandler.obtainMessage(MyHandler.MSG_VALIDATE_PRINTERS,
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printerIds).sendToTarget();
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}
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private void handleValidatePrinters(final List<PrinterId> printerIds) {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleValidatePrinters(printerIds);
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] validatePrinters()");
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}
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try {
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mPrintService.validatePrinters(printerIds);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error requesting printers validation.", re);
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}
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}
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}
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public void startPrinterStateTracking(PrinterId printerId) {
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mHandler.obtainMessage(MyHandler.MSG_START_PRINTER_STATE_TRACKING,
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printerId).sendToTarget();
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}
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private void handleStartPrinterStateTracking(final PrinterId printerId) {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleStartPrinterStateTracking(printerId);
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] startPrinterTracking()");
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}
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try {
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mPrintService.startPrinterStateTracking(printerId);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error requesting start printer tracking.", re);
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}
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}
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}
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public void stopPrinterStateTracking(PrinterId printerId) {
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mHandler.obtainMessage(MyHandler.MSG_STOP_PRINTER_STATE_TRACKING,
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printerId).sendToTarget();
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}
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private void handleStopPrinterStateTracking(final PrinterId printerId) {
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throwIfDestroyed();
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if (!isBound()) {
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ensureBound();
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mPendingCommands.add(new Runnable() {
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@Override
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public void run() {
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handleStopPrinterStateTracking(printerId);
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}
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});
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} else {
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] stopPrinterTracking()");
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}
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try {
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mPrintService.stopPrinterStateTracking(printerId);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error requesting stop printer tracking.", re);
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}
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}
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}
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private boolean isBound() {
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return mPrintService != null;
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}
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private void ensureBound() {
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if (isBound() || mBinding) {
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return;
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}
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] ensureBound()");
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}
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mBinding = true;
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mContext.bindServiceAsUser(mIntent, mServiceConnection,
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Context.BIND_AUTO_CREATE, new UserHandle(mUserId));
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}
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private void ensureUnbound() {
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if (!isBound() && !mBinding) {
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return;
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}
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if (DEBUG) {
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Slog.i(LOG_TAG, "[user: " + mUserId + "] ensureUnbound()");
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}
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mBinding = false;
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mPendingCommands.clear();
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if (isBound()) {
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try {
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mPrintService.setClient(null);
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} catch (RemoteException re) {
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/* ignore */
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}
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mPrintService.asBinder().unlinkToDeath(this, 0);
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mPrintService = null;
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mContext.unbindService(mServiceConnection);
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}
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}
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private void throwIfDestroyed() {
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if (mDestroyed) {
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throw new IllegalStateException("Cannot interact with a destroyed service");
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}
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}
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private class RemoteServiceConneciton implements ServiceConnection {
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@Override
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public void onServiceConnected(ComponentName name, IBinder service) {
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if (mDestroyed || !mBinding) {
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return;
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}
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mBinding = false;
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mPrintService = IPrintService.Stub.asInterface(service);
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try {
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service.linkToDeath(RemotePrintService.this, 0);
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} catch (RemoteException re) {
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handleBinderDied();
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return;
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}
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try {
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mPrintService.setClient(mPrintServiceClient);
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} catch (RemoteException re) {
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Slog.e(LOG_TAG, "Error setting client for: " + service, re);
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handleBinderDied();
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return;
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}
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final int pendingCommandCount = mPendingCommands.size();
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for (int i = 0; i < pendingCommandCount; i++) {
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Runnable pendingCommand = mPendingCommands.get(i);
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pendingCommand.run();
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}
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}
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@Override
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public void onServiceDisconnected(ComponentName name) {
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mBinding = true;
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}
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}
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private final class MyHandler extends Handler {
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public static final int MSG_CREATE_PRINTER_DISCOVERY_SESSION = 1;
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public static final int MSG_DESTROY_PRINTER_DISCOVERY_SESSION = 2;
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public static final int MSG_START_PRINTER_DISCOVERY = 3;
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public static final int MSG_STOP_PRINTER_DISCOVERY = 4;
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public static final int MSG_VALIDATE_PRINTERS = 5;
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public static final int MSG_START_PRINTER_STATE_TRACKING = 6;
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public static final int MSG_STOP_PRINTER_STATE_TRACKING = 7;
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public static final int MSG_ON_ALL_PRINT_JOBS_HANDLED = 8;
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public static final int MSG_ON_REQUEST_CANCEL_PRINT_JOB = 9;
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public static final int MSG_ON_PRINT_JOB_QUEUED = 10;
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public static final int MSG_DESTROY = 11;
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public static final int MSG_BINDER_DIED = 12;
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public MyHandler(Looper looper) {
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super(looper, null, false);
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}
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@Override
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@SuppressWarnings("unchecked")
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public void handleMessage(Message message) {
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switch (message.what) {
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case MSG_CREATE_PRINTER_DISCOVERY_SESSION: {
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handleCreatePrinterDiscoverySession();
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} break;
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case MSG_DESTROY_PRINTER_DISCOVERY_SESSION: {
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handleDestroyPrinterDiscoverySession();
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} break;
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case MSG_START_PRINTER_DISCOVERY: {
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List<PrinterId> priorityList = (ArrayList<PrinterId>) message.obj;
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handleStartPrinterDiscovery(priorityList);
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} break;
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case MSG_STOP_PRINTER_DISCOVERY: {
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|
handleStopPrinterDiscovery();
|
|
} break;
|
|
|
|
case MSG_VALIDATE_PRINTERS: {
|
|
List<PrinterId> printerIds = (List<PrinterId>) message.obj;
|
|
handleValidatePrinters(printerIds);
|
|
} break;
|
|
|
|
case MSG_START_PRINTER_STATE_TRACKING: {
|
|
PrinterId printerId = (PrinterId) message.obj;
|
|
handleStartPrinterStateTracking(printerId);
|
|
} break;
|
|
|
|
case MSG_STOP_PRINTER_STATE_TRACKING: {
|
|
PrinterId printerId = (PrinterId) message.obj;
|
|
handleStopPrinterStateTracking(printerId);
|
|
} break;
|
|
|
|
case MSG_ON_ALL_PRINT_JOBS_HANDLED: {
|
|
handleOnAllPrintJobsHandled();
|
|
} break;
|
|
|
|
case MSG_ON_REQUEST_CANCEL_PRINT_JOB: {
|
|
PrintJobInfo printJob = (PrintJobInfo) message.obj;
|
|
handleRequestCancelPrintJob(printJob);
|
|
} break;
|
|
|
|
case MSG_ON_PRINT_JOB_QUEUED: {
|
|
PrintJobInfo printJob = (PrintJobInfo) message.obj;
|
|
handleOnPrintJobQueued(printJob);
|
|
} break;
|
|
|
|
case MSG_DESTROY: {
|
|
handleDestroy();
|
|
} break;
|
|
|
|
case MSG_BINDER_DIED: {
|
|
handleBinderDied();
|
|
} break;
|
|
}
|
|
}
|
|
}
|
|
|
|
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_VISIBLE_TO_CLIENTS, PrintManager.APP_ID_ANY);
|
|
} finally {
|
|
Binder.restoreCallingIdentity(identity);
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
@Override
|
|
public PrintJobInfo getPrintJobInfo(int 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(int 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(int 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, int 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 onPrintersAdded(List<PrinterInfo> printers) {
|
|
RemotePrintService service = mWeakService.get();
|
|
if (service != null) {
|
|
throwIfPrinterIdsForPrinterInfoTampered(service.mComponentName, printers);
|
|
final long identity = Binder.clearCallingIdentity();
|
|
try {
|
|
service.mUserState.onPrintersAdded(printers);
|
|
} finally {
|
|
Binder.restoreCallingIdentity(identity);
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onPrintersRemoved(List<PrinterId> printerIds) {
|
|
RemotePrintService service = mWeakService.get();
|
|
if (service != null) {
|
|
throwIfPrinterIdsTampered(service.mComponentName, printerIds);
|
|
final long identity = Binder.clearCallingIdentity();
|
|
try {
|
|
service.mUserState.onPrintersRemoved(printerIds);
|
|
} 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() == null
|
|
|| !printerId.getServiceName().equals(serviceName)) {
|
|
throw new IllegalArgumentException("Invalid printer id: " + printerId);
|
|
}
|
|
}
|
|
}
|
|
}
|