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1   /*
2    $Id: ConsoleSupport.java,v 1.3 2003/11/28 05:43:24 jstrachan Exp $
3   
4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
5   
6    Redistribution and use of this software and associated documentation
7    ("Software"), with or without modification, are permitted provided
8    that the following conditions are met:
9   
10   1. Redistributions of source code must retain copyright
11      statements and notices.  Redistributions must also contain a
12      copy of this document.
13  
14   2. Redistributions in binary form must reproduce the
15      above copyright notice, this list of conditions and the
16      following disclaimer in the documentation and/or other
17      materials provided with the distribution.
18  
19   3. The name "groovy" must not be used to endorse or promote
20      products derived from this Software without prior written
21      permission of The Codehaus.  For written permission,
22      please contact info@codehaus.org.
23  
24   4. Products derived from this Software may not be called "groovy"
25      nor may "groovy" appear in their names without prior written
26      permission of The Codehaus. "groovy" is a registered
27      trademark of The Codehaus.
28  
29   5. Due credit should be given to The Codehaus -
30      http://groovy.codehaus.org/
31  
32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
43   OF THE POSSIBILITY OF SUCH DAMAGE.
44  
45   */
46  package groovy.ui;
47  
48  import groovy.lang.GroovyShell;
49  
50  import java.awt.Color;
51  
52  import javax.swing.JTextPane;
53  import javax.swing.text.Style;
54  import javax.swing.text.StyleConstants;
55  import javax.swing.text.StyleContext;
56  import javax.swing.text.StyledDocument;
57  
58  /***
59   * Base class for console
60   * 
61   * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
62   * @version $Revision: 1.3 $
63   */
64  public abstract class ConsoleSupport {
65  
66      Style promptStyle;
67      Style commandStyle;
68      Style outputStyle;
69      private GroovyShell shell;
70      private int counter;
71  
72      protected void addStylesToDocument(JTextPane outputArea) {
73          StyledDocument doc = outputArea.getStyledDocument();
74  
75          Style def = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE);
76  
77          Style regular = doc.addStyle("regular", def);
78          StyleConstants.setFontFamily(def, "SansSerif");
79  
80          promptStyle = doc.addStyle("prompt", regular);
81          StyleConstants.setForeground(promptStyle, Color.BLUE);
82  
83          commandStyle = doc.addStyle("command", regular);
84          StyleConstants.setForeground(commandStyle, Color.MAGENTA);
85  
86          outputStyle = doc.addStyle("output", regular);
87          StyleConstants.setBold(outputStyle, true);
88      }
89  
90      public Style getCommandStyle() {
91          return commandStyle;
92      }
93  
94      public Style getOutputStyle() {
95          return outputStyle;
96      }
97  
98      public Style getPromptStyle() {
99          return promptStyle;
100     }
101 
102     public GroovyShell getShell() {
103         return shell;
104     }
105 
106     protected Object evaluate(String text) {
107         System.out.println("Evaluating: " + text);
108         
109         if (shell == null) {
110             shell = new GroovyShell();
111         }
112 
113         String name = "Script" + counter++;
114         try {
115             return shell.evaluate(text, name);
116         }
117         catch (Exception e) {
118             handleException(text, e);
119             return null;
120         }
121     }
122 
123     protected abstract void handleException(String text, Exception e);
124 }