001    /*
002     $Id: ConsoleSupport.java,v 1.4 2005/01/28 09:58:06 dierk Exp $
003    
004     Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
005    
006     Redistribution and use of this software and associated documentation
007     ("Software"), with or without modification, are permitted provided
008     that the following conditions are met:
009    
010     1. Redistributions of source code must retain copyright
011        statements and notices.  Redistributions must also contain a
012        copy of this document.
013    
014     2. Redistributions in binary form must reproduce the
015        above copyright notice, this list of conditions and the
016        following disclaimer in the documentation and/or other
017        materials provided with the distribution.
018    
019     3. The name "groovy" must not be used to endorse or promote
020        products derived from this Software without prior written
021        permission of The Codehaus.  For written permission,
022        please contact info@codehaus.org.
023    
024     4. Products derived from this Software may not be called "groovy"
025        nor may "groovy" appear in their names without prior written
026        permission of The Codehaus. "groovy" is a registered
027        trademark of The Codehaus.
028    
029     5. Due credit should be given to The Codehaus -
030        http://groovy.codehaus.org/
031    
032     THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
033     ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
034     NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
035     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
036     THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
037     INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
038     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
039     SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
040     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
041     STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
042     ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
043     OF THE POSSIBILITY OF SUCH DAMAGE.
044    
045     */
046    package groovy.ui;
047    
048    import groovy.lang.GroovyShell;
049    
050    import java.awt.Color;
051    
052    import javax.swing.JTextPane;
053    import javax.swing.text.Style;
054    import javax.swing.text.StyleConstants;
055    import javax.swing.text.StyleContext;
056    import javax.swing.text.StyledDocument;
057    
058    /**
059     * Base class for console
060     * 
061     * @author <a href="mailto:james@coredevelopers.net">James Strachan</a>
062     * @version $Revision: 1.4 $
063     */
064    public abstract class ConsoleSupport {
065    
066        Style promptStyle;
067        Style commandStyle;
068        Style outputStyle;
069        private GroovyShell shell;
070        private int counter;
071    
072        protected void addStylesToDocument(JTextPane outputArea) {
073            StyledDocument doc = outputArea.getStyledDocument();
074    
075            Style def = StyleContext.getDefaultStyleContext().getStyle(StyleContext.DEFAULT_STYLE);
076    
077            Style regular = doc.addStyle("regular", def);
078            StyleConstants.setFontFamily(def, "Monospaced");
079    
080            promptStyle = doc.addStyle("prompt", regular);
081            StyleConstants.setForeground(promptStyle, Color.BLUE);
082    
083            commandStyle = doc.addStyle("command", regular);
084            StyleConstants.setForeground(commandStyle, Color.MAGENTA);
085    
086            outputStyle = doc.addStyle("output", regular);
087            StyleConstants.setBold(outputStyle, true);
088        }
089    
090        public Style getCommandStyle() {
091            return commandStyle;
092        }
093    
094        public Style getOutputStyle() {
095            return outputStyle;
096        }
097    
098        public Style getPromptStyle() {
099            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    }