1 /* 2 * Copyright (c) 2009, 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 package sun.awt.X11; 26 27 public 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 XToolkit.SAVED_ERROR_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 } | 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 */ 25 package sun.awt.X11; 26 27 public 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 * This is a base synthetic error handler containing a boolean flag which allows 47 * to show that an error is handled or not. 48 */ 49 public static class XErrorHandlerWithFlag extends XBaseErrorHandler { 50 private volatile boolean errorOccurred = false; 51 52 public boolean getErrorOccurredFlag() { 53 return errorOccurred; 54 } 55 56 /** 57 * Sets an internal boolean flag to a particular value. Should be always called with 58 * <code>false</code> value of the parameter <code>errorOccurred</code> before this 59 * error handler is set as current. 60 * @param errorOccurred <code>true</code> to indicate that an error was handled, 61 * <code>false</code> to reset the internal boolean flag 62 */ 63 public void setErrorOccurredFlag(boolean errorOccurred) { 64 this.errorOccurred = errorOccurred; 65 } 66 } 67 68 /* 69 * Instead of validating window id, we simply call XGetWindowProperty, 70 * but temporary install this function as the error handler to ignore 71 * BadWindow error. 72 */ 73 public static class IgnoreBadWindowHandler extends XBaseErrorHandler { 74 @Override 75 public int handleError(long display, XErrorEvent err) { 76 if (err.get_error_code() == XConstants.BadWindow) { 77 return 0; 78 } 79 return super.handleError(display, err); 80 } 81 // Shared instance 82 private static IgnoreBadWindowHandler theInstance = new IgnoreBadWindowHandler(); 83 public static IgnoreBadWindowHandler getInstance() { 84 return theInstance; 85 } 86 } 87 88 public static class VerifyChangePropertyHandler extends XBaseErrorHandler { 89 @Override 90 public int handleError(long display, XErrorEvent err) { 91 if (err.get_request_code() == XProtocolConstants.X_ChangeProperty) { 92 return 0; 93 } 94 return super.handleError(display, err); 95 } 96 // Shared instance 97 private static VerifyChangePropertyHandler theInstance = new VerifyChangePropertyHandler(); 98 public static VerifyChangePropertyHandler getInstance() { 99 return theInstance; 100 } 101 } 102 103 /** 104 * This is a synthetic error handler for errors generated by the native function 105 * <code>XShmAttach</code>. If an error is handled, an internal boolean flag of the 106 * handler is set to <code>true</code>. 107 */ 108 public static final class XShmAttachHandler extends XErrorHandlerWithFlag { 109 private XShmAttachHandler() {} 110 111 @Override 112 public int handleError(long display, XErrorEvent err) { 113 if (err.get_minor_code() == XConstants.X_ShmAttach) { 114 setErrorOccurredFlag(true); 115 return 0; 116 } 117 return super.handleError(display, err); 118 } 119 120 // Shared instance 121 private static XShmAttachHandler theInstance = new XShmAttachHandler(); 122 public static XShmAttachHandler getInstance() { 123 return theInstance; 124 } 125 } 126 127 /** 128 * This is a synthetic error handler for <code>BadAlloc</code> errors generated by the 129 * native <code>glX*</code> functions. Its internal boolean flag is set to <code>true</code>, 130 * if an error is handled. 131 */ 132 public static final class GLXBadAllocHandler extends XErrorHandlerWithFlag { 133 private GLXBadAllocHandler() {} 134 135 @Override 136 public int handleError(long display, XErrorEvent err) { 137 if (err.get_error_code() == XConstants.BadAlloc) { 138 setErrorOccurredFlag(true); 139 return 0; 140 } 141 return super.handleError(display, err); 142 } 143 144 private static GLXBadAllocHandler theInstance = new GLXBadAllocHandler(); 145 public static GLXBadAllocHandler getInstance() { 146 return theInstance; 147 } 148 } 149 } |