1/* 2 * Copyright (c) 2009, 2013, 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 */ 25package sun.awt.X11; 26 27public abstract class XErrorHandler { 28 29 /* 30 * Called under AWT lock 31 */ 32 public abstract int handleError(long display, XErrorEvent err); 33 34 /* 35 * Forwards all the errors to saved error handler (which was 36 * set before XToolkit had been initialized). 37 */ 38 public static class XBaseErrorHandler extends XErrorHandler { 39 @Override 40 public int handleError(long display, XErrorEvent err) { 41 return XErrorHandlerUtil.SAVED_XERROR_HANDLER(display, err); 42 } 43 } 44 45 /* 46 * Instead of validating window id, we simply call XGetWindowProperty, 47 * but temporary install this function as the error handler to ignore 48 * BadWindow error. 49 */ 50 public static class IgnoreBadWindowHandler extends XBaseErrorHandler { 51 @Override 52 public int handleError(long display, XErrorEvent err) { 53 if (err.get_error_code() == XConstants.BadWindow) { 54 return 0; 55 } 56 return super.handleError(display, err); 57 } 58 // Shared instance 59 private static IgnoreBadWindowHandler theInstance = new IgnoreBadWindowHandler(); 60 public static IgnoreBadWindowHandler getInstance() { 61 return theInstance; 62 } 63 } 64 65 public static class VerifyChangePropertyHandler extends XBaseErrorHandler { 66 @Override 67 public int handleError(long display, XErrorEvent err) { 68 if (err.get_request_code() == XProtocolConstants.X_ChangeProperty) { 69 return 0; 70 } 71 return super.handleError(display, err); 72 } 73 // Shared instance 74 private static VerifyChangePropertyHandler theInstance = new VerifyChangePropertyHandler(); 75 public static VerifyChangePropertyHandler getInstance() { 76 return theInstance; 77 } 78 } 79} 80