/*

 * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

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

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

 *

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

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

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

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

 * accompanied this code).

 *

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

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

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

 *

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

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

 * questions.

 */

/**

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

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

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

 *

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

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

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

 * separated by commas.

 *

 * @author  Thomas Ball

 */

package sun.awt;

import java.awt.EventQueue;

import java.awt.AWTEvent;

import java.awt.Toolkit;

import java.util.StringTokenizer;

public class TracedEventQueue extends EventQueue {

    // Determines whether any event tracing is enabled.

    static boolean trace = false;

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

    static int suppressedIDs[] = null;

    static {

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

        if (s.length() > 0) {

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

            int nIDs = st.countTokens();

            suppressedIDs = new int[nIDs];

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

                String idString = st.nextToken();

                try {

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

                } catch (NumberFormatException e) {

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

                                       "in awt.properties: \"" +

                                       idString + "\" -- skipped");

                    suppressedIDs[i] = 0;

                }

            }

        } else {

            suppressedIDs = new int[0];

        }

    }

    public void postEvent(AWTEvent theEvent) {

        boolean printEvent = true;

        int id = theEvent.getID();

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

            if (id == suppressedIDs[i]) {

                printEvent = false;

                break;

            }

        }

        if (printEvent) {

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

                               ": " + theEvent);

        }

        super.postEvent(theEvent);

    }

}