1 /* XGraphicsDevice.java -- GraphicsDevice for X 2 Copyright (C) 2006 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package gnu.java.awt.peer.x; 39 40 import gnu.classpath.SystemProperties; 41 import gnu.x11.Display; 42 import gnu.x11.EscherServerConnectionException; 43 44 import java.awt.GraphicsConfiguration; 45 import java.awt.GraphicsDevice; 46 import java.lang.reflect.Constructor; 47 import java.net.Socket; 48 49 /** 50 * This class represents an X Display. The actual connection is established 51 * lazily when it is first needed. 52 * 53 * @author Roman Kennke (kennke@aicas.com) 54 */ 55 public class XGraphicsDevice 56 extends GraphicsDevice 57 { 58 59 private XGraphicsConfiguration defaultConfiguration; 60 61 /** 62 * The X display associated with the XGraphicsDevice. This is established 63 * when {@link #getDisplay} is first called. 64 */ 65 private Display display; 66 67 /** 68 * The display name from which the display will be initialized. 69 */ 70 private Display.Name displayName; 71 72 /** 73 * The event pump for this X Display. 74 */ 75 private XEventPump eventPump; 76 77 /** 78 * Creates a new XGraphicsDevice. 79 */ XGraphicsDevice(Display.Name dn)80 XGraphicsDevice(Display.Name dn) 81 { 82 displayName = dn; 83 } 84 getType()85 public int getType() 86 { 87 return TYPE_RASTER_SCREEN; 88 } 89 getIDstring()90 public String getIDstring() 91 { 92 // TODO: Implement this. 93 throw new UnsupportedOperationException("Not yet implemented."); 94 } 95 getConfigurations()96 public GraphicsConfiguration[] getConfigurations() 97 { 98 // TODO: Implement this. 99 throw new UnsupportedOperationException("Not yet implemented."); 100 } 101 getDefaultConfiguration()102 public GraphicsConfiguration getDefaultConfiguration() 103 { 104 if (defaultConfiguration == null) 105 defaultConfiguration = new XGraphicsConfiguration(this); 106 return defaultConfiguration; 107 } 108 109 /** 110 * Returns the X Display associated with this XGraphicsDevice. 111 * This establishes the connection to the X server on the first invocation. 112 * 113 * @return the X Display associated with this XGraphicsDevice 114 */ getDisplay()115 Display getDisplay() 116 { 117 if (display == null) 118 { 119 if (displayName.hostname.equals("")) 120 displayName.hostname = "localhost"; 121 if (XToolkit.DEBUG) 122 System.err.println("connecting to : " + displayName); 123 // Try to connect via unix domain sockets when host == localhost. 124 if ((displayName.hostname.equals("localhost") 125 || displayName.hostname.equals("")) 126 && SystemProperties.getProperty("gnu.xawt.no_local_sockets") == null) 127 { 128 Socket socket = createLocalSocket(); 129 if (socket != null) 130 { 131 try 132 { 133 display = new Display(socket, "localhost", 134 displayName.display_no, 135 displayName.screen_no); 136 } 137 catch (EscherServerConnectionException e) 138 { 139 throw new RuntimeException(e.getCause()); 140 } 141 } 142 } 143 144 // The following happens when we are configured to use plain sockets, 145 // when the connection is probably remote or when we couldn't load 146 // the LocalSocket class stuff. 147 if (display == null) 148 { 149 try 150 { 151 display = new Display(displayName); 152 } 153 catch (EscherServerConnectionException e) 154 { 155 throw new RuntimeException(e.getCause()); 156 } 157 } 158 159 eventPump = new XEventPump(display); 160 } 161 return display; 162 } 163 getEventPump()164 XEventPump getEventPump() 165 { 166 return eventPump; 167 } 168 169 /** 170 * Tries to load the LocalSocket class and initiate a connection to the 171 * local X server. 172 */ createLocalSocket()173 private Socket createLocalSocket() 174 { 175 Socket socket = null; 176 try 177 { 178 // TODO: Is this 100% ok? 179 String sockPath = "/tmp/.X11-unix/X" + displayName.display_no; 180 Class localSocketAddressClass = 181 Class.forName("gnu.java.net.local.LocalSocketAddress"); 182 Constructor localSocketAddressConstr = 183 localSocketAddressClass.getConstructor(new Class[]{ String.class }); 184 Object addr = 185 localSocketAddressConstr.newInstance(new Object[]{ sockPath }); 186 Class localSocketClass = 187 Class.forName("gnu.java.net.local.LocalSocket"); 188 Constructor localSocketConstructor = 189 localSocketClass.getConstructor(new Class[]{localSocketAddressClass}); 190 Object localSocket = 191 localSocketConstructor.newInstance(new Object[]{ addr }); 192 socket = (Socket) localSocket; 193 } 194 catch (Exception ex) 195 { 196 // Whatever goes wrong here, we return null. 197 } 198 return socket; 199 } 200 } 201