Source for gnu.java.awt.peer.GnomeDesktopPeer

   1: /* GnomeDesktopPeer.java -- Offers a GNOME Desktop peer for DesktopPeer
   2:  Copyright (C) 2006, 2007 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;
  39: 
  40: import gnu.java.lang.CPStringBuilder;
  41: 
  42: import java.io.IOException;
  43: import java.io.InputStream;
  44: import java.net.URI;
  45: 
  46: /**
  47:  * @author Mario Torre <neugens@limasoftware.net>
  48:  */
  49: public class GnomeDesktopPeer
  50:     extends ClasspathDesktopPeer
  51: {
  52:   /**
  53:    * Query string to use if a GNOME desktop is detected to get the name of the
  54:    * default browser. This requires gconftool-2 (part of GNOME).
  55:    */
  56:   private static final String BROWSER_QUERY_GNOME =
  57:     "gconftool-2 -g /desktop/gnome/url-handlers/http/command";
  58: 
  59:   protected String getCommand(String action)
  60:   {
  61:     // check if a command already exists
  62:     String command = super.getCommand(action);
  63: 
  64:     if (command == null)
  65:       {
  66:         try
  67:           {
  68:             if (action == _BROWSE)
  69:               {
  70:                 command = execQuery(BROWSER_QUERY_GNOME);
  71:               }
  72:             else if (action == _PRINT)
  73:               {
  74:                 command = null;
  75:               }
  76:             else
  77:               {
  78:                 command = "gnome-open";
  79:               }
  80:           }
  81:         catch (Exception e)
  82:           {
  83:             command = null;
  84:           }
  85:       }
  86: 
  87:     return command;
  88:   }
  89: 
  90:   public void browse(URI url) throws IOException
  91:   {
  92:     checkPermissions();
  93: 
  94:     String browser = getCommand(_BROWSE);
  95: 
  96:     if (browser == null)
  97:       throw new UnsupportedOperationException();
  98: 
  99:     browser = browser + " " + url.toString();
 100: 
 101:     Runtime.getRuntime().exec(browser);
 102:   }
 103: 
 104:   protected boolean supportCommand(String check)
 105:   {
 106:     if (check == _PRINT)
 107:       {
 108:         return super.supportCommand(check);
 109:       }
 110: 
 111:     return true;
 112:   }
 113: 
 114:   public void mail() throws IOException
 115:   {
 116:     checkPermissions();
 117: 
 118:     String mail = getCommand(_MAIL);
 119: 
 120:     if (mail == null)
 121:       throw new UnsupportedOperationException();
 122: 
 123:     Runtime.getRuntime().exec(mail + " mailto:");
 124:   }
 125: 
 126:   protected String execQuery(String command) throws IOException
 127:   {
 128:     InputStream in = null;
 129:     CPStringBuilder output = new CPStringBuilder();
 130: 
 131:     try
 132:       {
 133:         Process process = Runtime.getRuntime().exec(command);
 134: 
 135:         // Get the input stream and read from it
 136:         in = process.getInputStream();
 137:         int c;
 138:         while ((c = in.read()) != - 1)
 139:           {
 140:             output.append((char) c);
 141:           }
 142:       }
 143:     finally
 144:       {
 145:         if (in != null)
 146:           in.close();
 147:       }
 148: 
 149:     // remove %s from the string, leave only the command line
 150:     int index = output.indexOf("%s");
 151:     output.delete(index, index + 1);
 152: 
 153:     return output.toString().trim();
 154:   }
 155: }