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6765f90250
Co-authored-by: Sean Mullan <mullan@openjdk.org> Co-authored-by: Lance Andersen <lancea@openjdk.org> Co-authored-by: Weijun Wang <weijun@openjdk.org> Reviewed-by: erikj, darcy, chegar, naoto, joehw, alanb, mchung, kcr, prr, lancea
70 lines
2.5 KiB
Java
70 lines
2.5 KiB
Java
/*
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* Copyright (c) 2019, 2021, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.awt;
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import java.awt.GraphicsEnvironment;
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import java.awt.Toolkit;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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public class PlatformGraphicsInfo {
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public static GraphicsEnvironment createGE() {
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return new X11GraphicsEnvironment();
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}
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public static Toolkit createToolkit() {
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return new sun.awt.X11.XToolkit();
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}
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/**
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* Called from java.awt.GraphicsEnvironment when
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* to check if on this platform, the JDK should default to
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* headless mode, in the case the application did specify
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* a value for the java.awt.headless system property.
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*/
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@SuppressWarnings("removal")
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public static boolean getDefaultHeadlessProperty() {
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return
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AccessController.doPrivileged((PrivilegedAction<Boolean>) () -> {
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final String display = System.getenv("DISPLAY");
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return display == null || display.trim().isEmpty();
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});
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}
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/**
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* Called from java.awt.GraphicsEnvironment when
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* getDefaultHeadlessProperty() has returned true, and
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* the application has called an API that requires headful.
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*/
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public static String getDefaultHeadlessMessage() {
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return
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"\nNo X11 DISPLAY variable was set,\n" +
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"but this program performed an operation which requires it.";
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}
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}
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