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Lightweight Java Game Library 2.4.2 » org » lwjgl » WindowsSysImplementation.java
/*
 * Copyright (c) 2002-2008 LWJGL Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'LWJGL' nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.lwjgl;

import java.security.PrivilegedExceptionAction;
import java.security.PrivilegedActionException;
import java.security.AccessController;
import java.lang.reflect.Method;

import org.lwjgl.opengl.Display;

/**
 * <p>
 * @author $Author: spasi $
 * @version $Revision: 3300 $
 * $Id: WindowsSysImplementation.java 3300 2010-03-31 20:56:07Z spasi $
 */
final class WindowsSysImplementation extends DefaultSysImplementation {
  private final static int JNI_VERSION = 22; 

  static {
    Sys.initialize();
  }
  
  public int getRequiredJNIVersion() {
    return JNI_VERSION;
  }

  public long getTimerResolution() {
    return 1000;
  }

  public long getTime() {
    return nGetTime();
  }
  private static native long nGetTime();

  public final boolean has64Bit() {
    return true;
  }

  private static long getHwnd() {
    if (!Display.isCreated())
      return 0;
    /* Use reflection since we can't make Display.getImplementation
     * public
     */
    try {
      Long hwnd_obj = (Long)AccessController.doPrivileged(new PrivilegedExceptionAction() {
        public Object run() throws Exception {
          Method getImplementation_method = Display.class.getDeclaredMethod("getImplementation", null);
          getImplementation_method.setAccessible(true);
          Object display_impl = getImplementation_method.invoke(null, null);
          Class WindowsDisplay_class = Class.forName("org.lwjgl.opengl.WindowsDisplay");
          Method getHwnd_method = WindowsDisplay_class.getDeclaredMethod("getHwnd", null);
          getHwnd_method.setAccessible(true);
          Long hwnd = (Long)getHwnd_method.invoke(display_impl, null);
          return hwnd;
        }
      });
      return hwnd_obj.longValue();
    } catch (PrivilegedActionException e) {
      throw new Error(e);
    }
  }

  public void alert(String title, String message) {
    if(!Display.isCreated()) {
      initCommonControls();
    }
    nAlert(getHwnd(), title, message);
  }
  private static native void nAlert(long parent_hwnd, String title, String message);
  private static native void initCommonControls();

  public boolean openURL(final String url) {
    try {
      LWJGLUtil.execPrivileged(new String[]{"rundll32", "url.dll,FileProtocolHandler", url});
      return true;
    } catch (Exception e) {
      LWJGLUtil.log("Failed to open url (" + url + "): " + e.getMessage());
      return false;
    }
  }

  public String getClipboard() {
    return nGetClipboard();
  }
  private static native String nGetClipboard();
}
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