1 /*

     2  * Copyright (c) 1997, 2018, 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.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

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

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

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

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

    15  * accompanied this code).

    16  *

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

    18  * 2 along with this work; if not, write to the Free Software Foundation,

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

    20  *

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

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

    23  * questions.

    24  */

    25 

    26 /**

    27  * An EventQueue subclass which adds selective tracing of events as they

    28  * are posted to an EventQueue.  Tracing is globally enabled and disabled

    29  * by the AWT.TraceEventPosting property in awt.properties.  <P>

    30  *

    31  * The optional AWT.NoTraceIDs property defines a list of AWTEvent IDs

    32  * which should not be traced, such as MouseEvent.MOUSE_MOVED or PaintEvents.

    33  * This list is declared by specifying the decimal value of each event's ID,

    34  * separated by commas.

    35  *

    36  * @author  Thomas Ball

    37  */

    38 

    39 package sun.awt;

    40 

    41 import java.awt.EventQueue;

    42 import java.awt.AWTEvent;

    43 import java.awt.Toolkit;

    44 import java.util.StringTokenizer;

    45 

    46 public class TracedEventQueue extends EventQueue {

    47 

    48     // Determines whether any event tracing is enabled.

    49     static boolean trace = false;

    50 

    51     // The list of event IDs to ignore when tracing.

    52     static int[] suppressedIDs = null;

    53 

    54     static {

    55         String s = Toolkit.getProperty("AWT.IgnoreEventIDs", "");

    56         if (s.length() > 0) {

    57             StringTokenizer st = new StringTokenizer(s, ",");

    58             int nIDs = st.countTokens();

    59             suppressedIDs = new int[nIDs];

    60             for (int i = 0; i < nIDs; i++) {

    61                 String idString = st.nextToken();

    62                 try {

    63                     suppressedIDs[i] = Integer.parseInt(idString);

    64                 } catch (NumberFormatException e) {

    65                     System.err.println("Bad ID listed in AWT.IgnoreEventIDs " +

    66                                        "in awt.properties: \"" +

    67                                        idString + "\" -- skipped");

    68                     suppressedIDs[i] = 0;

    69                 }

    70             }

    71         } else {

    72             suppressedIDs = new int[0];

    73         }

    74     }

    75 

    76     public void postEvent(AWTEvent theEvent) {

    77         boolean printEvent = true;

    78         int id = theEvent.getID();

    79         for (int i = 0; i < suppressedIDs.length; i++) {

    80             if (id == suppressedIDs[i]) {

    81                 printEvent = false;

    82                 break;

    83             }

    84         }

    85         if (printEvent) {

    86             System.out.println(Thread.currentThread().getName() +

    87                                ": " + theEvent);

    88         }

    89         super.postEvent(theEvent);

    90     }

    91 }