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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: 43: import java.awt.GraphicsConfiguration; 44: import java.awt.GraphicsDevice; 45: import java.lang.reflect.Constructor; 46: import java.net.Socket; 47: 48: /** 49: * This class represents an X Display. The actual connection is established 50: * lazily when it is first needed. 51: * 52: * @author Roman Kennke (kennke@aicas.com) 53: */ 54: public class XGraphicsDevice 55: extends GraphicsDevice 56: { 57: 58: private XGraphicsConfiguration defaultConfiguration; 59: 60: /** 61: * The X display associated with the XGraphicsDevice. This is established 62: * when {@link #getDisplay} is first called. 63: */ 64: private Display display; 65: 66: /** 67: * The display name from which the display will be initialized. 68: */ 69: private Display.Name displayName; 70: 71: /** 72: * The event pump for this X Display. 73: */ 74: private XEventPump eventPump; 75: 76: /** 77: * Creates a new XGraphicsDevice. 78: */ 79: XGraphicsDevice(Display.Name dn) 80: { 81: displayName = dn; 82: } 83: 84: public int getType() 85: { 86: return TYPE_RASTER_SCREEN; 87: } 88: 89: public String getIDstring() 90: { 91: // TODO: Implement this. 92: throw new UnsupportedOperationException("Not yet implemented."); 93: } 94: 95: public GraphicsConfiguration[] getConfigurations() 96: { 97: // TODO: Implement this. 98: throw new UnsupportedOperationException("Not yet implemented."); 99: } 100: 101: public GraphicsConfiguration getDefaultConfiguration() 102: { 103: if (defaultConfiguration == null) 104: defaultConfiguration = new XGraphicsConfiguration(this); 105: return defaultConfiguration; 106: } 107: 108: /** 109: * Returns the X Display associated with this XGraphicsDevice. 110: * This establishes the connection to the X server on the first invocation. 111: * 112: * @return the X Display associated with this XGraphicsDevice 113: */ 114: Display getDisplay() 115: { 116: if (display == null) 117: { 118: if (displayName.hostname.equals("")) 119: displayName.hostname = "localhost"; 120: if (XToolkit.DEBUG) 121: System.err.println("connecting to : " + displayName); 122: // Try to connect via unix domain sockets when host == localhost. 123: if ((displayName.hostname.equals("localhost") 124: || displayName.hostname.equals("")) 125: && SystemProperties.getProperty("gnu.xawt.no_local_sockets") == null) 126: { 127: Socket socket = createLocalSocket(); 128: if (socket != null) 129: { 130: display = new Display(socket, "localhost", 131: displayName.display_no, 132: displayName.screen_no); 133: } 134: } 135: 136: // The following happens when we are configured to use plain sockets, 137: // when the connection is probably remote or when we couldn't load 138: // the LocalSocket class stuff. 139: if (display == null) 140: display = new Display(displayName); 141: 142: eventPump = new XEventPump(display); 143: } 144: return display; 145: } 146: 147: XEventPump getEventPump() 148: { 149: return eventPump; 150: } 151: 152: /** 153: * Tries to load the LocalSocket class and initiate a connection to the 154: * local X server. 155: */ 156: private Socket createLocalSocket() 157: { 158: Socket socket = null; 159: try 160: { 161: // TODO: Is this 100% ok? 162: String sockPath = "/tmp/.X11-unix/X" + displayName.display_no; 163: Class localSocketAddressClass = 164: Class.forName("gnu.java.net.local.LocalSocketAddress"); 165: Constructor localSocketAddressConstr = 166: localSocketAddressClass.getConstructor(new Class[]{ String.class }); 167: Object addr = 168: localSocketAddressConstr.newInstance(new Object[]{ sockPath }); 169: Class localSocketClass = 170: Class.forName("gnu.java.net.local.LocalSocket"); 171: Constructor localSocketConstructor = 172: localSocketClass.getConstructor(new Class[]{localSocketAddressClass}); 173: Object localSocket = 174: localSocketConstructor.newInstance(new Object[]{ addr }); 175: socket = (Socket) localSocket; 176: } 177: catch (Exception ex) 178: { 179: // Whatever goes wrong here, we return null. 180: } 181: return socket; 182: } 183: }