1 /*
   2  * Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 /*
  27  * This source code is provided to illustrate the usage of a given feature
  28  * or technique and has been deliberately simplified. Additional steps
  29  * required for a production-quality application, such as security checks,
  30  * input validation and proper error handling, might not be present in
  31  * this sample code.
  32  */
  33 
  34 
  35 package com.sun.tools.example.debug.gui;
  36 
  37 import java.awt.*;
  38 import java.awt.event.*;
  39 import javax.swing.*;
  40 
  41 public class TypeScript extends JPanel {
  42 
  43     private static final long serialVersionUID = -983704841363534885L;
  44     private JTextArea history;
  45     private JTextField entry;
  46 
  47     private JLabel promptLabel;
  48 
  49     private JScrollBar historyVScrollBar;
  50     private JScrollBar historyHScrollBar;
  51 
  52     private boolean echoInput = false;
  53 
  54     private static String newline = System.getProperty("line.separator");
  55 
  56     public TypeScript(String prompt) {
  57         this(prompt, true);
  58     }
  59 
  60     public TypeScript(String prompt, boolean echoInput) {
  61         this.echoInput = echoInput;
  62 
  63         setLayout(new BoxLayout(this, BoxLayout.Y_AXIS));
  64         //setBorder(new EmptyBorder(5, 5, 5, 5));
  65 
  66         history = new JTextArea(0, 0);
  67         history.setEditable(false);
  68         JScrollPane scroller = new JScrollPane(history);
  69         historyVScrollBar = scroller.getVerticalScrollBar();
  70         historyHScrollBar = scroller.getHorizontalScrollBar();
  71 
  72         add(scroller);
  73 
  74         JPanel cmdLine = new JPanel();
  75         cmdLine.setLayout(new BoxLayout(cmdLine, BoxLayout.X_AXIS));
  76         //cmdLine.setBorder(new EmptyBorder(5, 5, 0, 0));
  77 
  78         promptLabel = new JLabel(prompt + " ");
  79         cmdLine.add(promptLabel);
  80         entry = new JTextField();
  81 //### Swing bug workaround.
  82 entry.setMaximumSize(new Dimension(1000, 20));
  83         cmdLine.add(entry);
  84         add(cmdLine);
  85     }
  86 
  87     /******
  88     public void setFont(Font f) {
  89         entry.setFont(f);
  90         history.setFont(f);
  91     }
  92     ******/
  93 
  94     public void setPrompt(String prompt) {
  95         promptLabel.setText(prompt + " ");
  96     }
  97 
  98     public void append(String text) {
  99         history.append(text);
 100         historyVScrollBar.setValue(historyVScrollBar.getMaximum());
 101         historyHScrollBar.setValue(historyHScrollBar.getMinimum());
 102     }
 103 
 104     public void newline() {
 105         history.append(newline);
 106         historyVScrollBar.setValue(historyVScrollBar.getMaximum());
 107         historyHScrollBar.setValue(historyHScrollBar.getMinimum());
 108     }
 109 
 110     public void flush() {}
 111 
 112     public void addActionListener(ActionListener a) {
 113         entry.addActionListener(a);
 114     }
 115 
 116     public void removeActionListener(ActionListener a) {
 117         entry.removeActionListener(a);
 118     }
 119 
 120     public String readln() {
 121         String text = entry.getText();
 122         entry.setText("");
 123         if (echoInput) {
 124             history.append(">>>");
 125             history.append(text);
 126             history.append(newline);
 127             historyVScrollBar.setValue(historyVScrollBar.getMaximum());
 128             historyHScrollBar.setValue(historyHScrollBar.getMinimum());
 129         }
 130         return text;
 131     }
 132 }