android/source/src/java/org/libreoffice/PDFDocumentAdapter.java

   1 package org.libreoffice;
   2
   3 import android.content.Context;
   4 import android.os.Bundle;
   5 import android.os.CancellationSignal;
   6 import android.os.ParcelFileDescriptor;
   7 import android.print.PageRange;
   8 import android.print.PrintAttributes;
   9 import android.print.PrintDocumentAdapter;
  10 import android.print.PrintDocumentInfo;
  11
  12 import java.io.File;
  13 import java.io.FileInputStream;
  14 import java.io.FileOutputStream;
  15 import java.io.IOException;
  16 import java.io.InputStream;
  17 import java.io.OutputStream;
  18
  19 public class PDFDocumentAdapter extends PrintDocumentAdapter{
  20     Context mContext;
  21     String pdfFile;
  22
  23     public PDFDocumentAdapter(Context mContext, String pdfFile) {
  24         this.mContext = mContext;
  25         this.pdfFile = pdfFile;
  26     }
  27
  28     @Override
  29     public void onLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras) {
  30         if (cancellationSignal.isCanceled()) {
  31             callback.onLayoutCancelled();
  32         }
  33         else {
  34             File f = new File(pdfFile);
  35             PrintDocumentInfo.Builder builder=
  36                     new PrintDocumentInfo.Builder(f.getName());
  37             builder.setContentType(PrintDocumentInfo.CONTENT_TYPE_DOCUMENT)
  38                     .setPageCount(PrintDocumentInfo.PAGE_COUNT_UNKNOWN)
  39                     .build();
  40             callback.onLayoutFinished(builder.build(),
  41                     !newAttributes.equals(oldAttributes));
  42         }
  43     }
  44
  45     @Override
  46     public void onWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback) {
  47         InputStream in=null;
  48         OutputStream out=null;
  49         try {
  50             File file = new File(pdfFile);
  51             in = new FileInputStream(file);
  52             out=new FileOutputStream(destination.getFileDescriptor());
  53
  54             byte[] buf=new byte[in.available()];
  55             int size;
  56
  57             while ((size=in.read(buf)) >= 0
  58                     && !cancellationSignal.isCanceled()) {
  59                 out.write(buf, 0, size);
  60             }
  61
  62             if (cancellationSignal.isCanceled()) {
  63                 callback.onWriteCancelled();
  64             }
  65             else {
  66                 callback.onWriteFinished(new PageRange[] { PageRange.ALL_PAGES });
  67             }
  68         }
  69         catch (Exception e) {
  70             callback.onWriteFailed(e.getMessage());
  71             e.printStackTrace();
  72         }
  73         finally {
  74             try {
  75                 in.close();
  76                 out.close();
  77             }
  78             catch (IOException e) {
  79                 e.printStackTrace();
  80             }
  81         }
  82
  83     }
  84 }