PlatformUtil.java

/*******************************************************************************
 * Copyright (c) 2015 Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.common.util;

import java.lang.reflect.Field;

import org.eclipse.core.runtime.Platform;

public class PlatformUtil {
	private static final String SWT_GTK3 = "SWT_GTK3"; //$NON-NLS-1$
	private static final String MAC = "mac"; //$NON-NLS-1$
	private static final String DARWIN = "darwin"; //$NON-NLS-1$
	private static final String WIN = "win"; //$NON-NLS-1$
	private static final String LINUX = "nux"; //$NON-NLS-1$
	private static OS detectedOs;
	
	public static boolean isWindows() {
		return OS.WINDOWS.equals(getOs());
	}

	public static boolean isMacOS() {
		return OS.MACOS.equals(getOs());
	}

	public static boolean isLinux() {
		return OS.LINUX.equals(getOs());
	}

	public static OS getOs() {
		if (detectedOs == null) {
			String currentOs = System.getProperty("os.name", "generic").toLowerCase(); //$NON-NLS-1$ //$NON-NLS-2$
			if ((currentOs.indexOf(MAC) >= 0) || (currentOs.indexOf(DARWIN) >= 0)) {
				detectedOs = OS.MACOS;
			} else if (currentOs.indexOf(WIN) >= 0) {
				detectedOs = OS.WINDOWS;
			} else if (currentOs.indexOf(LINUX) >= 0) {
				detectedOs = OS.LINUX;
			} else {
				detectedOs = OS.OTHER;
			}
		}
		return detectedOs;
	}

	public enum OS {
		WINDOWS, MACOS, LINUX, OTHER
	}
		
	public static boolean isGTK3() {
		if (Platform.WS_GTK.equals(Platform.getWS())) {
			try {
				Class<?> clazz = Class.forName("org.eclipse.swt.internal.gtk.OS"); //$NON-NLS-1$
				Field field = clazz.getDeclaredField("GTK3"); //$NON-NLS-1$
				boolean gtk3 = field.getBoolean(field);
				return gtk3;
			} catch (ClassNotFoundException e) {
				return isGTK3Env();
			} catch (NoSuchFieldException e) {
				return false;
			} catch (SecurityException e) {
				return isGTK3Env();
			} catch (IllegalArgumentException e) {
				return isGTK3Env();
			} catch (IllegalAccessException e) {
				return isGTK3Env();
			}
		}
		return false;
	}

	private static boolean isGTK3Env() {
		String gtk3 = System.getProperty(SWT_GTK3);
		if (gtk3 == null) {
			gtk3 = System.getenv(SWT_GTK3);
		}
		return !"0".equals(gtk3); //$NON-NLS-1$
	}
}