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 
  31 public class PlatformGraphicsInfo {
  32 
  33     static {
  34         jdk.internal.access.SharedSecrets.getJavaLangAccess().loadLibrary("awt");
  35     }
  36 
  37     public static GraphicsEnvironment createGE() {
  38         return new CGraphicsEnvironment();
  39     }
  40 
  41     public static Toolkit createToolkit() {
  42         return new sun.lwawt.macosx.LWCToolkit();
  43     }
  44 
  45     /**
  46      * Returns true if the WindowServer is available, false otherwise.
  47      *
  48      * @return true if the WindowServer is available, false otherwise
  49      */
  50     public static native boolean isInAquaSession();
  51 
  52     public static boolean getDefaultHeadlessProperty() {
  53          return !isInAquaSession();
  54     }
  55 
  56     /*
  57      * Called from java.awt.GraphicsEnvironment when
  58      * getDefaultHeadlessProperty() has returned true, and
  59      * the application has called an API that requires headful.
  60      */
  61     public static String getDefaultHeadlessMessage() {
  62         return
  63             "\nThe application is not running in a desktop session,\n" +
  64             "but this program performed an operation which requires it.";
  65     }
  66 
  67 }