1 /*

     2  * Copyright (c) 2001, 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  */

    24 

    25 package sun.jvm.hotspot.bugspot;

    26 

    27 import java.awt.*;

    28 import java.util.*;

    29 import javax.swing.*;

    30 import javax.swing.table.*;

    31 

    32 import sun.jvm.hotspot.debugger.*;

    33 

    34 /** Displays registers in a window. FIXME: this will need more work to

    35     understand and handle register windows. */

    36 

    37 public class RegisterPanel extends JPanel {

    38   private java.util.List/*<RegisterInfo>*/ registers;

    39   private AbstractTableModel dataModel;

    40   private boolean valid;

    41   private boolean editable;

    42   private String nullAddressString;

    43   private ThreadProxy curThread;

    44   private JTable table;

    45 

    46   static class RegisterInfo {

    47     private String name;

    48     private Address value;

    49 

    50     RegisterInfo(String name, Address value) {

    51       this.name = name;

    52       this.value = value;

    53     }

    54 

    55     String  getName()  { return name;  }

    56     Address getValue() { return value; }

    57   }

    58 

    59   public RegisterPanel() {

    60     super();

    61 

    62     registers = new ArrayList();

    63 

    64     dataModel = new AbstractTableModel() {

    65         public int getColumnCount() { return 2; }

    66         public int getRowCount()    { return registers.size(); }

    67         public String getColumnName(int col) {

    68           switch (col) {

    69           case 0:

    70             return "Register Name";

    71           case 1:

    72             return "Register Value";

    73           default:

    74             throw new RuntimeException("Index " + col + " out of bounds");

    75           }

    76         }

    77         public Object getValueAt(int row, int col) {

    78           RegisterInfo info = (RegisterInfo) registers.get(row);

    79 

    80           switch (col) {

    81           case 0:

    82             return info.getName();

    83           case 1:

    84             if (valid) {

    85               Address val = info.getValue();

    86               if (val != null) {

    87                 return val;

    88               } else {

    89                 return nullAddressString;

    90               }

    91             } else {

    92               return "-";

    93             }

    94           default:

    95             throw new RuntimeException("Index (" + col + ", " + row + ") out of bounds");

    96           }

    97         }

    98         public boolean isCellEditable(int row, int col) {

    99           if (col == 0) return false;

   100           if (!valid) return false;

   101           if (curThread == null) return false;

   102           if (!curThread.canSetContext()) return false;

   103 

   104           // FIXME: add listener to watch for register changes

   105           //          return true;

   106           return false;

   107         }

   108       };

   109 

   110     // Build user interface

   111     setLayout(new BorderLayout());

   112     table = new JTable(dataModel);

   113     table.setCellSelectionEnabled(true);

   114     table.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION);

   115     table.setDragEnabled(true);

   116     JTableHeader header = table.getTableHeader();

   117     header.setReorderingAllowed(false);

   118     JScrollPane scrollPane = new JScrollPane(table);

   119     add(scrollPane, BorderLayout.CENTER);

   120   }

   121 

   122 

   123   /** Updates the register panel with the register set from the

   124       specified thread. Call this when the process has been suspended

   125       and the current thread has been set. FIXME: this interface will

   126       need to change to support register windows. */

   127   public void update(ThreadProxy curThread) {

   128     this.curThread = curThread;

   129     ThreadContext context = curThread.getContext();

   130     editable = curThread.canSetContext();

   131     registers.clear();

   132     for (int i = 0; i < context.getNumRegisters(); i++) {

   133       String name = context.getRegisterName(i);

   134       Address addr = context.getRegisterAsAddress(i);

   135       if ((nullAddressString == null) && (addr != null)) {

   136         String addrStr = addr.toString();

   137         StringBuffer buf = new StringBuffer();

   138         buf.append("0x");

   139         int len = addrStr.length() - 2;

   140         for (int j = 0; j < len; j++) {

   141           buf.append("0");

   142         }

   143         nullAddressString = buf.toString();

   144       }

   145       registers.add(new RegisterInfo(name, addr));

   146     }

   147     valid = true;

   148     SwingUtilities.invokeLater(new Runnable() {

   149         public void run() {

   150           dataModel.fireTableDataChanged();

   151         }

   152       });

   153   }

   154 

   155   /** Clears the registers' values. Call this when the processs has

   156       been resumed. */

   157   public void clear() {

   158     valid = false;

   159     nullAddressString = null;

   160     SwingUtilities.invokeLater(new Runnable() {

   161         public void run() {

   162           dataModel.fireTableDataChanged();

   163         }

   164       });

   165   }

   166 

   167   public void setFont(Font font) {

   168     super.setFont(font);

   169     if (table != null) {

   170       table.setFont(font);

   171     }

   172   }

   173 }