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.security.AccessController; 30 import java.security.PrivilegedAction; 31 32 public class PlatformGraphicsInfo { 33 34 static { 35 AccessController.doPrivileged((PrivilegedAction<Void>) () -> { 36 System.loadLibrary("awt"); 37 return null; 38 }); 39 } 40 41 public static GraphicsEnvironment createGE() { 42 return new CGraphicsEnvironment(); 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 }