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/*
* 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.printspooler;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.os.RemoteException;
import android.print.ILayoutResultCallback;
import android.print.IPrintDocumentAdapter;
import android.print.IWriteResultCallback;
import android.print.PageRange;
import android.print.PrintAttributes;
import android.util.Log;
import libcore.io.IoUtils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* This class represents a remote print document adapter instance.
*/
final class RemotePrintDocumentAdapter {
private static final String LOG_TAG = "RemotePrintDocumentAdapter";
private static final boolean DEBUG = false;
private final IPrintDocumentAdapter mRemoteInterface;
private final File mFile;
public RemotePrintDocumentAdapter(IPrintDocumentAdapter printAdatper, File file) {
mRemoteInterface = printAdatper;
mFile = file;
}
public void start() {
if (DEBUG) {
Log.i(LOG_TAG, "start()");
}
try {
mRemoteInterface.start();
} catch (RemoteException re) {
Log.e(LOG_TAG, "Error calling start()", re);
}
}
public void layout(PrintAttributes oldAttributes, PrintAttributes newAttributes,
ILayoutResultCallback callback, Bundle metadata, int sequence) {
if (DEBUG) {
Log.i(LOG_TAG, "layout()");
}
try {
mRemoteInterface.layout(oldAttributes, newAttributes, callback, metadata, sequence);
} catch (RemoteException re) {
Log.e(LOG_TAG, "Error calling layout()", re);
}
}
public void write(final PageRange[] pages, final IWriteResultCallback callback,
final int sequence) {
if (DEBUG) {
Log.i(LOG_TAG, "write()");
}
new AsyncTask<Void, Void, Void>() {
@Override
protected Void doInBackground(Void... params) {
InputStream in = null;
OutputStream out = null;
ParcelFileDescriptor source = null;
ParcelFileDescriptor sink = null;
try {
ParcelFileDescriptor[] pipe = ParcelFileDescriptor.createPipe();
source = pipe[0];
sink = pipe[1];
in = new FileInputStream(source.getFileDescriptor());
out = new FileOutputStream(mFile);
// Async call to initiate the other process writing the data.
mRemoteInterface.write(pages, sink, callback, sequence);
// Close the source. It is now held by the client.
sink.close();
sink = null;
// Read the data.
final byte[] buffer = new byte[8192];
while (true) {
final int readByteCount = in.read(buffer);
if (readByteCount < 0) {
break;
}
out.write(buffer, 0, readByteCount);
}
} catch (RemoteException re) {
Log.e(LOG_TAG, "Error calling write()", re);
} catch (IOException ioe) {
Log.e(LOG_TAG, "Error calling write()", ioe);
} finally {
IoUtils.closeQuietly(in);
IoUtils.closeQuietly(out);
IoUtils.closeQuietly(sink);
IoUtils.closeQuietly(source);
}
return null;
}
}.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, (Void[]) null);
}
public void finish() {
if (DEBUG) {
Log.i(LOG_TAG, "finish()");
}
try {
mRemoteInterface.finish();
} catch (RemoteException re) {
Log.e(LOG_TAG, "Error calling finish()", re);
}
}
public void cancel() {
if (DEBUG) {
Log.i(LOG_TAG, "cancel()");
}
try {
mRemoteInterface.cancel();
} catch (RemoteException re) {
Log.e(LOG_TAG, "Error calling cancel()", re);
}
}
}
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