1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the Free
9 * Software Foundation; either version 2 of the License, or (at your option)
10 * any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.gui;
22
23import javax.swing.*;
24import java.io.*;
25import java.lang.reflect.InvocationTargetException;
26
27
28/**
29 * This <code>PrintStream</code> appends its output to a given text area.
30 *
31 * @author Eric Lafortune
32 */
33final class TextAreaOutputStream extends FilterOutputStream implements Runnable
34{
35    private final JTextArea textArea;
36
37
38    public TextAreaOutputStream(JTextArea textArea)
39    {
40        super(new ByteArrayOutputStream());
41
42        this.textArea = textArea;
43    }
44
45
46    // Implementation for FilterOutputStream.
47
48    public void flush() throws IOException
49    {
50        super.flush();
51
52        try
53        {
54            // Append the accumulated buffer contents to the text area.
55            SwingUtil.invokeAndWait(this);
56        }
57        catch (Exception e)
58        {
59            // Nothing.
60        }
61    }
62
63
64    // Implementation for Runnable.
65
66    public void run()
67    {
68        ByteArrayOutputStream out = (ByteArrayOutputStream)super.out;
69
70        // Has any new text been written?
71        String text = out.toString();
72        if (text.length() > 0)
73        {
74            // Append the accumulated text to the text area.
75            textArea.append(text);
76
77            // Clear the buffer.
78            out.reset();
79        }
80    }
81}
82