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    1   /*
    2    $Id: ConsoleSupport.java 3018 2005-10-25 12:34:41Z alang $
    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: 3018 $
    63   */
    64  public abstract class ConsoleSupport {
    65
    66      Style promptStyle;
    67      Style commandStyle;
    68      Style outputStyle;
    69      private GroovyShell shell;
    70      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, "Monospaced");
    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         if (shell == null) {
    104             shell = new GroovyShell();
    105         }
    106         return shell;
    107     }
    108
    109     protected Object evaluate(String text) {
    110         String name = "Script" + counter++;
    111         try {
    112             return getShell().evaluate(text, name);
    113         }
    114         catch (Exception e) {
    115             handleException(text, e);
    116             return null;
    117         }
    118     }
    119
    120     protected abstract void handleException(String text, Exception e);
    121 }