1 /* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2014 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 */ 21 package proguard.gui; 22 23 import javax.swing.*; 24 import java.io.*; 25 26 27 /** 28 * This <code>PrintStream</code> appends its output to a given text area. 29 * 30 * @author Eric Lafortune 31 */ 32 final class TextAreaOutputStream extends FilterOutputStream implements Runnable 33 { 34 private final JTextArea textArea; 35 36 TextAreaOutputStream(JTextArea textArea)37 public TextAreaOutputStream(JTextArea textArea) 38 { 39 super(new ByteArrayOutputStream()); 40 41 this.textArea = textArea; 42 } 43 44 45 // Implementation for FilterOutputStream. 46 flush()47 public void flush() throws IOException 48 { 49 super.flush(); 50 51 try 52 { 53 // Append the accumulated buffer contents to the text area. 54 SwingUtil.invokeAndWait(this); 55 } 56 catch (Exception e) 57 { 58 // Nothing. 59 } 60 } 61 62 63 // Implementation for Runnable. 64 run()65 public void run() 66 { 67 ByteArrayOutputStream out = (ByteArrayOutputStream)super.out; 68 69 // Has any new text been written? 70 String text = out.toString(); 71 if (text.length() > 0) 72 { 73 // Append the accumulated text to the text area. 74 textArea.append(text); 75 76 // Clear the buffer. 77 out.reset(); 78 } 79 } 80 } 81