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/* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko;
import org.mozilla.gecko.AppConstants.Versions;
import org.mozilla.gecko.GeckoAppShell;
import org.mozilla.gecko.util.GeckoRequest;
import org.mozilla.gecko.util.IOUtils;
import org.mozilla.gecko.util.NativeJSObject;
import org.mozilla.gecko.util.ThreadUtils;
import org.json.JSONException;
import org.json.JSONObject;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import android.content.Context;
import android.os.Bundle;
import android.os.CancellationSignal;
import android.os.ParcelFileDescriptor;
import android.print.PrintAttributes;
import android.print.PrintDocumentAdapter;
import android.print.PrintDocumentAdapter.LayoutResultCallback;
import android.print.PrintDocumentAdapter.WriteResultCallback;
import android.print.PrintDocumentInfo;
import android.print.PrintManager;
import android.print.PageRange;
import android.util.Log;
public class PrintHelper {
private static final String LOGTAG = "GeckoPrintUtils";
public static void printPDF(final Context context) {
GeckoAppShell.sendRequestToGecko(new GeckoRequest("Print:PDF", new JSONObject()) {
@Override
public void onResponse(NativeJSObject nativeJSObject) {
final String filePath = nativeJSObject.getString("file");
final String title = nativeJSObject.getString("title");
finish(context, filePath, title);
}
@Override
public void onError(NativeJSObject error) {
// Gecko didn't respond due to state change, javascript error, etc.
Log.d(LOGTAG, "No response from Gecko on request to generate a PDF");
}
private void finish(final Context context, final String filePath, final String title) {
PrintManager printManager = (PrintManager) context.getSystemService(Context.PRINT_SERVICE);
String jobName = title;
// The adapter methods are all called on the UI thread by the PrintManager. Put the heavyweight code
// in onWrite on the background thread.
PrintDocumentAdapter pda = new PrintDocumentAdapter() {
@Override
public void onWrite(final PageRange[] pages, final ParcelFileDescriptor destination, final CancellationSignal cancellationSignal, final WriteResultCallback callback) {
ThreadUtils.postToBackgroundThread(new Runnable() {
@Override
public void run() {
InputStream input = null;
OutputStream output = null;
try {
File pdfFile = new File(filePath);
input = new FileInputStream(pdfFile);
output = new FileOutputStream(destination.getFileDescriptor());
byte[] buf = new byte[8192];
int bytesRead;
while ((bytesRead = input.read(buf)) > 0) {
output.write(buf, 0, bytesRead);
}
callback.onWriteFinished(new PageRange[] { PageRange.ALL_PAGES });
} catch (FileNotFoundException ee) {
Log.d(LOGTAG, "Unable to find the temporary PDF file.");
} catch (IOException ioe) {
Log.e(LOGTAG, "IOException while transferring temporary PDF file: ", ioe);
} finally {
IOUtils.safeStreamClose(input);
IOUtils.safeStreamClose(output);
}
}
});
}
@Override
public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
if (cancellationSignal.isCanceled()) {
callback.onLayoutCancelled();
return;
}
PrintDocumentInfo pdi = new PrintDocumentInfo.Builder(filePath).setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT).build();
callback.onLayoutFinished(pdi, true);
}
@Override
public void onFinish() {
// Remove the temporary file when the printing system is finished.
try {
File pdfFile = new File(filePath);
pdfFile.delete();
} catch (NullPointerException npe) {
// Silence the exception. We only want to delete a real file. We don't
// care if the file doesn't exist.
}
}
};
printManager.print(jobName, pda, null);
}
});
}
}
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