1 /*
   2  * Copyright (c) 2019, 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 
  26 package sun.awt;
  27 
  28 import java.awt.GraphicsEnvironment;
  29 import java.awt.Toolkit;
  30 import java.security.AccessController;
  31 import java.security.PrivilegedAction;
  32 
  33 public class PlatformGraphicsInfo {
  34 
  35     static {
  36         AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
  37             System.loadLibrary("awt");
  38             return null;
  39         });
  40     }
  41 
  42     public static GraphicsEnvironment createGE() {
  43         return new CGraphicsEnvironment();
  44     }
  45 
  46     public static Toolkit createToolkit() {
  47         return new sun.lwawt.macosx.LWCToolkit();
  48     }
  49 
  50     /**
  51      * Returns true if the WindowServer is available, false otherwise.
  52      *
  53      * @return true if the WindowServer is available, false otherwise
  54      */
  55     public static native boolean isInAquaSession();
  56 
  57     public static boolean getDefaultHeadlessProperty() {
  58          return !isInAquaSession();
  59     }
  60 
  61     /*
  62      * Called from java.awt.GraphicsEnvironment when
  63      * getDefaultHeadlessProperty() has returned true, and
  64      * the application has called an API that requires headful.
  65      */
  66     public static String getDefaultHeadlessMessage() {
  67         return
  68             "\nThe application is not running in a desktop session,\n" +
  69             "but this program performed an operation which requires it.";
  70     }
  71 
  72 }