1/* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 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