libjava/classpath/gnu/java/awt/peer/x/XGraphicsEnvironment.java

   1 /* XGraphicsEnvironment.java -- Represents the X environment
   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
  39 package gnu.java.awt.peer.x;
  40
  41 import gnu.java.awt.font.OpenTypeFontPeer;
  42 import gnu.java.awt.java2d.RasterGraphics;
  43 import gnu.x11.Display;
  44
  45 import java.awt.Font;
  46 import java.awt.Graphics2D;
  47 import java.awt.GraphicsDevice;
  48 import java.awt.GraphicsEnvironment;
  49 import java.awt.image.BufferedImage;
  50 import java.io.File;
  51 import java.io.FileInputStream;
  52 import java.io.FileNotFoundException;
  53 import java.io.IOException;
  54 import java.util.ArrayList;
  55 import java.util.Locale;
  56 import java.util.Properties;
  57
  58 /**
  59  * Represents the X environment for AWT.
  60  *
  61  * @author Roman Kennke (kennke@aicas.com)
  62  */
  63 public class XGraphicsEnvironment
  64   extends GraphicsEnvironment
  65 {
  66
  67   /**
  68    * The default graphics device. This is normally the local main X
  69    * Display, but can be configured to be any X connection.
  70    */
  71   private XGraphicsDevice defaultDevice;
  72
  73   /**
  74    * All configured devices.
  75    */
  76   private XGraphicsDevice[] devices;
  77
  78   /**
  79    * Creates a new XGraphicsEnvironment. This loads the configuration if
  80    * there is one present and initializes the XGraphicsDevices in the
  81    * environment. If there is no configuration, then there is one
  82    * default device initialized with the local main X device.
  83    */
  84   public XGraphicsEnvironment()
  85   {
  86     // Initiliaze the devices.
  87     Properties props = new Properties();
  88     File config = new File(System.getProperty("user.home"),
  89                            ".xawt.properties");
  90
  91     try
  92       {
  93         FileInputStream configIn = new FileInputStream(config);
  94         props.load(configIn);
  95         int dev = 1;
  96         ArrayList deviceList = new ArrayList();
  97         while (true)
  98           {
  99             String propName = "display." + dev;
 100             String propValue = props.getProperty(propName);
 101             if (propValue != null)
 102               {
 103                 Display.Name displayName = new Display.Name(propValue);
 104                 XGraphicsDevice device = new XGraphicsDevice(displayName);
 105                 if (dev == 1)
 106                   defaultDevice = device;
 107                 deviceList.add(device);
 108                 dev++;
 109               }
 110             else
 111               {
 112                 if (dev == 1)
 113                   {
 114                     defaultDevice = initDefaultDevice();
 115                     deviceList.add(defaultDevice);
 116                   }
 117                 break;
 118               }
 119           }
 120         devices = (XGraphicsDevice[]) deviceList.toArray
 121                                       (new XGraphicsDevice[deviceList.size()]);
 122       }
 123     catch (FileNotFoundException ex)
 124       {
 125         defaultDevice = initDefaultDevice();
 126         devices = new XGraphicsDevice[]{ defaultDevice };
 127       }
 128     catch (IOException ex)
 129       {
 130         defaultDevice = initDefaultDevice();
 131         devices = new XGraphicsDevice[]{ defaultDevice };
 132       }
 133
 134   }
 135
 136   /**
 137    * Helper method that initializes the default device in the case when there
 138    * is no configuration for the default.
 139    */
 140   private XGraphicsDevice initDefaultDevice()
 141   {
 142     String display = System.getenv("DISPLAY");
 143     if (display == null)
 144       display = ":0.0";
 145     Display.Name displayName = new Display.Name(display);
 146     return new XGraphicsDevice(displayName);
 147   }
 148
 149   /**
 150    * Returns all configured screen devices.
 151    *
 152    * @return all configured screen devices
 153    */
 154   public GraphicsDevice[] getScreenDevices()
 155   {
 156     // We return a copy so that nobody can fiddle with our devices.
 157     XGraphicsDevice[] copy = new XGraphicsDevice[devices.length];
 158     System.arraycopy(devices, 0, copy, 0, devices.length);
 159     return copy;
 160   }
 161
 162   /**
 163    * Returns the default screen device.
 164    *
 165    * @return the default screen device
 166    */
 167   public GraphicsDevice getDefaultScreenDevice()
 168   {
 169     return defaultDevice;
 170   }
 171
 172   /**
 173    * Returns a Graphics instance suitable for drawing on top of the
 174    * BufferedImage.
 175    *
 176    * @param image the buffered image to create a graphics for
 177    *
 178    * @return a Graphics2D instance for drawing on the BufferedImage
 179    */
 180   public Graphics2D createGraphics(BufferedImage image)
 181   {
 182     return new RasterGraphics(image.getRaster(), image.getColorModel());
 183   }
 184
 185   public Font[] getAllFonts()
 186   {
 187     // TODO: Implement this.
 188     throw new UnsupportedOperationException("Not yet implemented.");
 189   }
 190
 191   public String[] getAvailableFontFamilyNames()
 192   {
 193     return getAvailableFontFamilyNames(Locale.getDefault());
 194   }
 195
 196   public String[] getAvailableFontFamilyNames(Locale l)
 197   {
 198     // TODO: This doesn't work when we are using X fonts.
 199     // Fix this.
 200     return OpenTypeFontPeer.getAvailableFontFamilyNames(l);
 201   }
 202
 203 }