1 /*

     2  * Copyright (c) 2019, 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.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 import java.awt.Container;

    24 import java.awt.event.KeyEvent;

    25 import java.awt.Robot;

    26 import javax.swing.JFrame;

    27 import javax.swing.JScrollPane;

    28 import javax.swing.JTextArea;

    29 import javax.swing.SwingUtilities;

    30 import javax.swing.event.DocumentEvent;

    31 import javax.swing.event.UndoableEditEvent;

    32 import javax.swing.event.UndoableEditListener;

    33 import javax.swing.text.BadLocationException;

    34 import javax.swing.text.AbstractDocument;

    35 import javax.swing.text.Document;

    36 import javax.swing.text.PlainDocument;

    37 import javax.swing.undo.CompoundEdit;

    38 import javax.swing.undo.UndoManager;

    39 

    40 /*

    41  * @test

    42  * @key headful

    43  * @bug 8190763

    44  * @summary Class Cast Exception on (CompoundEdit) UndoableEditEvent.getEdit()

    45  * @run main TestCCEOnEditEvent

    46  */

    47 public class TestCCEOnEditEvent {

    48     private Container contentPane = null;

    49     private JTextArea textArea = null;

    50     private static Robot robot;

    51     private static JFrame frame;

    52     public static void main(String[] arguments) throws Exception {

    53         try{

    54             robot = new Robot();

    55             robot.setAutoDelay(50);

    56             TestCCEOnEditEvent test = new TestCCEOnEditEvent();

    57             SwingUtilities.invokeAndWait(new Runnable() {

    58                 @Override

    59                 public void run() {

    60                     test.createAndShowGUI();

    61                 }

    62             });

    63 

    64             robot.keyPress(KeyEvent.VK_ENTER);

    65             robot.keyRelease(KeyEvent.VK_ENTER);

    66             robot.waitForIdle();

    67         } finally {

    68             SwingUtilities.invokeLater(new Runnable(){

    69                 @Override

    70                 public void run(){

    71                     frame.dispose();

    72                 }

    73             });

    74         }

    75     }

    76 

    77     public void createAndShowGUI() {

    78         frame = new JFrame();

    79         contentPane  = frame.getContentPane();

    80         createTextArea();

    81         frame.setSize(200, 200);

    82         frame.setVisible(true);

    83     }

    84 

    85     private void createTextArea() {

    86         textArea = new JTextArea("Text Area") {

    87             @Override

    88             protected Document createDefaultModel() {

    89                 return new PlainDocument() {

    90                     @Override

    91                     protected void fireUndoableEditUpdate(UndoableEditEvent event) {

    92                         Object[] listeners = listenerList.getListenerList();

    93                         for (int index = listeners.length - 2; index >= 0; index -= 2) {

    94                             Object listenerType = listeners[index];

    95                             if (listenerType == UndoableEditListener.class) {

    96                                 super.fireUndoableEditUpdate(event);

    97                             }

    98                         }

    99                     }

   100                 };

   101             }

   102         };

   103         textArea.getDocument().addUndoableEditListener(new UndoManager() {

   104             @Override

   105             public void undoableEditHappened(UndoableEditEvent event) {

   106                 CompoundEdit edit = null;

   107                 try {

   108                     edit = (CompoundEdit) event.getEdit();

   109                 }

   110                 catch(ClassCastException e ) {

   111                     throw new RuntimeException("Class Cast Exception is thrown on (CompoundEdit) UndoableEditEvent.getEdit()");

   112                 }

   113                 AbstractDocument.DefaultDocumentEvent documentEvent =

   114                         (AbstractDocument.DefaultDocumentEvent) edit;

   115                 DocumentEvent.EventType editType = documentEvent.getType();

   116                 int editOffset = documentEvent.getOffset();

   117                 int editLength = documentEvent.getLength();

   118 

   119             }

   120         });

   121         try {

   122             textArea.setSelectionStart(textArea.getLineEndOffset(0));

   123         }

   124         catch (BadLocationException exception) {

   125         }

   126         JScrollPane scrollPane = new JScrollPane(textArea,

   127                         JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,

   128                         JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

   129 

   130         contentPane.add(scrollPane);

   131     }

   132 }