/*

 * Copyright 2009 Sun Microsystems, Inc.  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.  Sun designates this

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

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package sun.awt.X11;

public abstract class XErrorHandler {

    /*

     * Called under AWT lock

     */

    public abstract int handleError(long display, XErrorEvent err);

    /*

     * Forwards all the errors to saved error handler (which was

     * set before XToolkit had been initialized).

     */

    public static class XBaseErrorHandler extends XErrorHandler {

        @Override

        public int handleError(long display, XErrorEvent err) {

            return XToolkit.SAVED_ERROR_HANDLER(display, err);

        }

    }

    /*

     * Instead of validating window id, we simply call XGetWindowProperty,

     * but temporary install this function as the error handler to ignore

     * BadWindow error.

     */

    public static class IgnoreBadWindowHandler extends XBaseErrorHandler {

        @Override

        public int handleError(long display, XErrorEvent err) {

            if (err.get_error_code() == XConstants.BadWindow) {

                return 0;

            }

            return super.handleError(display, err);

        }

        // Shared instance

        private static IgnoreBadWindowHandler theInstance = new IgnoreBadWindowHandler();

        public static IgnoreBadWindowHandler getInstance() {

            return theInstance;

        }

    }

    public static class VerifyChangePropertyHandler extends XBaseErrorHandler {

        @Override

        public int handleError(long display, XErrorEvent err) {

            if (err.get_request_code() == XProtocolConstants.X_ChangeProperty) {

                return 0;

            }

            return super.handleError(display, err);

        }

        // Shared instance

        private static VerifyChangePropertyHandler theInstance = new VerifyChangePropertyHandler();

        public static VerifyChangePropertyHandler getInstance() {

            return theInstance;

        }

    }

}