250 lines
8.6 KiB
Java
250 lines
8.6 KiB
Java
/*
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* Copyright (c) 2002-2006 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl;
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import java.io.File;
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import java.lang.reflect.Method;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.security.AccessController;
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import java.security.PrivilegedAction;
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import java.security.PrivilegedExceptionAction;
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import org.lwjgl.input.Mouse;
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/**
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* <p>
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* System class (named Sys so as not to conflict with java.lang.System)
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* </p>
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* @author cix_foo <cix_foo@users.sourceforge.net>
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* @version $Revision$
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* $Id$
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*/
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public final class Sys {
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/** The native library name */
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private static final String JNI_LIBRARY_NAME = "lwjgl";
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/** Current version of library */
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private static final String VERSION = "2.0a";
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/** Current version of the JNI library */
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static final int JNI_VERSION = 12;
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/** The implementation instance to delegate platform specific behavior to */
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private final static SysImplementation implementation;
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private final static String POSTFIX64BIT = "64";
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private static void doLoadLibrary(final String lib_name) {
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AccessController.doPrivileged(new PrivilegedAction() {
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public Object run() {
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String library_path = System.getProperty("org.lwjgl.librarypath");
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if (library_path != null) {
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System.load(library_path + File.separator +
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System.mapLibraryName(lib_name));
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} else {
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System.loadLibrary(lib_name);
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}
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return null;
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}
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});
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}
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private static void loadLibrary(final String lib_name) {
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try {
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doLoadLibrary(lib_name);
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} catch (UnsatisfiedLinkError e) {
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if (implementation.has64Bit()) {
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try {
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doLoadLibrary(lib_name + POSTFIX64BIT);
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return;
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} catch (UnsatisfiedLinkError e2) {
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LWJGLUtil.log("Failed to load 64 bit library: " + e2.getMessage());
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}
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}
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// Throw original error
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throw e;
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}
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}
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static {
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implementation = createImplementation();
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loadLibrary(JNI_LIBRARY_NAME);
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int native_jni_version = implementation.getJNIVersion();
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if (native_jni_version != JNI_VERSION)
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throw new LinkageError("Version mismatch: jar version is '" + JNI_VERSION +
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"', native libary version is '" + native_jni_version + "'");
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implementation.setDebug(LWJGLUtil.DEBUG);
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}
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private static SysImplementation createImplementation() {
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switch (LWJGLUtil.getPlatform()) {
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case LWJGLUtil.PLATFORM_LINUX:
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return new LinuxSysImplementation();
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case LWJGLUtil.PLATFORM_WINDOWS:
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return new org.lwjgl.WindowsSysImplementation();
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case LWJGLUtil.PLATFORM_MACOSX:
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return new org.lwjgl.MacOSXSysImplementation();
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default:
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throw new IllegalStateException("Unsupported platform");
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}
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}
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/**
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* No constructor for Sys.
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*/
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private Sys() {
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}
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/**
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* Return the version of the core LWJGL libraries as a String.
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*/
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public static String getVersion() {
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return VERSION;
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}
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/**
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* Initialization. This is just a dummy method to trigger the static constructor.
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*/
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public static void initialize() {
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}
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/**
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* Obtains the number of ticks that the hires timer does in a second. This method is fast;
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* it should be called as frequently as possible, as it recalibrates the timer.
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*
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* @return timer resolution in ticks per second or 0 if no timer is present.
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*/
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public static long getTimerResolution() {
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return implementation.getTimerResolution();
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}
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/**
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* Gets the current value of the hires timer, in ticks. When the Sys class is first loaded
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* the hires timer is reset to 0. If no hires timer is present then this method will always
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* return 0.<p><strong>NOTEZ BIEN</strong> that the hires timer WILL wrap around.
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*
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* @return the current hires time, in ticks (always >= 0)
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*/
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public static long getTime() {
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return implementation.getTime() & 0x7FFFFFFFFFFFFFFFL;
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}
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/**
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* Attempt to display a modal alert to the user. This method should be used
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* when a game fails to initialize properly or crashes out losing its display
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* in the process. It is provided because AWT may not be available on the target
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* platform, although on Mac and Linux and other platforms supporting AWT we
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* delegate the task to AWT instead of doing it ourselves.
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* <p>
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* The alert should display the title and the message and then the current
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* thread should block until the user dismisses the alert - typically with an
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* OK button click.
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* <p>
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* It may be that the user's system has no windowing system installed for some
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* reason, in which case this method may do nothing at all, or attempt to provide
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* some console output.
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*
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* @param title The title of the alert. We suggest using the title of your game.
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* @param message The message text for the alert.
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*/
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public static void alert(String title, String message) {
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boolean grabbed = Mouse.isGrabbed();
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if (grabbed) {
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Mouse.setGrabbed(false);
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}
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if (title == null)
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title = "";
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if (message == null)
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message = "";
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implementation.alert(title, message);
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if (grabbed) {
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Mouse.setGrabbed(true);
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}
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}
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/**
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* Open the system web browser and point it at the specified URL. It is recommended
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* that this not be called whilst your game is running, but on application exit in
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* a shutdown hook, as the screen resolution will not be reset when the browser is
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* brought into view.
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* <p>
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* There is no guarantee that this will work, nor that we can detect if it has
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* failed - hence we don't return success code or throw an Exception. This is just a
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* best attempt at opening the URL given - don't rely on it to work!
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* <p>
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* @param url The URL. Ensure that the URL is properly encoded.
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* @return false if we are CERTAIN the call has failed
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*/
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public static boolean openURL(String url) {
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// Attempt to use Webstart if we have it available
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try {
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// Lookup the javax.jnlp.BasicService object
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final Class serviceManagerClass = Class.forName("javax.jnlp.ServiceManager");
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Method lookupMethod = (Method)AccessController.doPrivileged(new PrivilegedExceptionAction() {
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public Object run() throws Exception {
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return serviceManagerClass.getMethod("lookup", new Class[] {String.class});
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}
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});
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Object basicService = lookupMethod.invoke(serviceManagerClass, new Object[] {"javax.jnlp.BasicService"});
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final Class basicServiceClass = Class.forName("javax.jnlp.BasicService");
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Method showDocumentMethod = (Method)AccessController.doPrivileged(new PrivilegedExceptionAction() {
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public Object run() throws Exception {
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return basicServiceClass.getMethod("showDocument", new Class[] {URL.class});
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}
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});
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try {
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Boolean ret = (Boolean) showDocumentMethod.invoke(basicService, new Object[] {new URL(url)});
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return ret.booleanValue();
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} catch (MalformedURLException e) {
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e.printStackTrace(System.err);
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return false;
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}
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} catch (Exception ue) {
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return implementation.openURL(url);
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}
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}
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/**
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* Get the contents of the system clipboard. The system might not have a
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* clipboard (particularly if it doesn't even have a keyboard) in which case
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* we return null. Otherwise we return a String, which may be the empty
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* string "".
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*
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* @return a String, or null if there is no system clipboard.
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*/
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public static String getClipboard() {
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return implementation.getClipboard();
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}
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}
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