Source for gnu.javax.activation.viewers.TextViewer

   1: /* TextViewer.java -- Simple text viewer component.
   2:    Copyright (C) 2004 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.javax.activation.viewers;
  39: 
  40: import java.awt.Dimension;
  41: import java.awt.TextArea;
  42: import java.io.ByteArrayOutputStream;
  43: import java.io.InputStream;
  44: import java.io.IOException;
  45: import javax.activation.CommandObject;
  46: import javax.activation.DataHandler;
  47: 
  48: /**
  49:  * Simple text display component.
  50:  *
  51:  * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
  52:  * @version 1.0.2
  53:  */
  54: public class TextViewer extends TextArea
  55:     implements CommandObject
  56: {
  57: 
  58:     public TextViewer()
  59:     {
  60:         super("", 24, 80, 1);
  61:         setEditable(false);
  62:     }
  63: 
  64:     public Dimension getPreferredSize()
  65:     {
  66:         return getMinimumSize(24, 80);
  67:     }
  68: 
  69:     public void setCommandContext(String verb, DataHandler dh)
  70:         throws IOException
  71:     {
  72:         InputStream in = dh.getInputStream();
  73:         ByteArrayOutputStream bytes = new ByteArrayOutputStream();
  74:         byte[] buf = new byte[4096];
  75:         for (int len = in.read(buf); len != -1; len = in.read(buf))
  76:             bytes.write(buf, 0, len);
  77:         in.close();
  78:         setText(bytes.toString());
  79:     }
  80: 
  81: }