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DirectInputEnvironmentPlugin.java

/*
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 * Copyright 2002 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package net.java.games.input;

import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.List;
import java.util.ArrayList;
import java.io.File;
import java.io.IOException;

import net.java.games.util.plugins.Plugin;

/** DirectInput implementation of controller environment
 * @author martak
 * @author elias
 * @version 1.0
 */
00055 public final class DirectInputEnvironmentPlugin extends ControllerEnvironment implements Plugin {
      
      private static boolean supported = false;
            
      /**
       * Static utility method for loading native libraries.
       * It will try to load from either the path given by
       * the net.java.games.input.librarypath property
       * or through System.loadLibrary().
       * 
       */
00066       static void loadLibrary(final String lib_name) {
            AccessController.doPrivileged(
                        new PrivilegedAction() {
                              public final Object run() {
                                  try {
                                    String lib_path = System.getProperty("net.java.games.input.librarypath");
                                    if (lib_path != null)
                                          System.load(lib_path + File.separator + System.mapLibraryName(lib_name));
                                    else
                                          System.loadLibrary(lib_name);
                                  } catch (UnsatisfiedLinkError e) {
                                      e.printStackTrace();
                                      supported = false;
                                  }
                                    return null;
                              }
                        });
      }
    
      static String getPrivilegedProperty(final String property) {
             return (String)AccessController.doPrivileged(new PrivilegedAction() {
                      public Object run() {
                          return System.getProperty(property);
                      }
                  });
            }
            

      static String getPrivilegedProperty(final String property, final String default_value) {
       return (String)AccessController.doPrivileged(new PrivilegedAction() {
                public Object run() {
                    return System.getProperty(property, default_value);
                }
            });
      }
            
      static {
            String osName = getPrivilegedProperty("os.name", "").trim();
            if(osName.startsWith("Windows")) {
                  supported = true;
                  if("x86".equals(getPrivilegedProperty("os.arch"))) {
                        loadLibrary("jinput-dx8");
                  } else {
                        loadLibrary("jinput-dx8_64");
                  }
            }
      }

      private final Controller[] controllers;
      private final List active_devices = new ArrayList();
      private final DummyWindow window;

      /** Creates new DirectInputEnvironment */
00119       public DirectInputEnvironmentPlugin() {         
            DummyWindow window = null;
            Controller[] controllers = new Controller[]{};
            if(isSupported()) {
                  try {
                        window = new DummyWindow();
                        try {
                              controllers = enumControllers(window);
                        } catch (IOException e) {
                              window.destroy();
                              throw e;
                        }
                  } catch (IOException e) {
                        logln("Failed to enumerate devices: " + e.getMessage());
                  }
                  this.window = window;
                  this.controllers = controllers;
                  AccessController.doPrivileged(
                              new PrivilegedAction() {
                                    public final Object run() {
                                          Runtime.getRuntime().addShutdownHook(new ShutdownHook());
                                          return null;
                                    }
                              });
            } else {
                  // These are final fields, so can't set them, then over ride 
                  // them if we are supported.
                  this.window = null;
                  this.controllers = controllers;
            }
      }

00151       public final Controller[] getControllers() {
            return controllers;
      }

      private final Component[] createComponents(IDirectInputDevice device, boolean map_mouse_buttons) {
            List device_objects = device.getObjects();
            List controller_components = new ArrayList();
            for (int i = 0; i < device_objects.size(); i++) {
                  DIDeviceObject device_object = (DIDeviceObject)device_objects.get(i);
                  Component.Identifier identifier = device_object.getIdentifier();
                  if (identifier == null)
                        continue;
                  if (map_mouse_buttons && identifier instanceof Component.Identifier.Button) {
                        identifier = DIIdentifierMap.mapMouseButtonIdentifier((Component.Identifier.Button)identifier);
                  }
                  DIComponent component = new DIComponent(identifier, device_object);
                  controller_components.add(component);
                  device.registerComponent(device_object, component);
            }
            Component[] components = new Component[controller_components.size()];
            controller_components.toArray(components);
            return components;
      }
            
      private final Mouse createMouseFromDevice(IDirectInputDevice device) {
            Component[] components = createComponents(device, true);
            Mouse mouse = new DIMouse(device, components, new Controller[]{}, device.getRumblers());
            if (mouse.getX() != null && mouse.getY() != null && mouse.getPrimaryButton() != null)
                  return mouse;
            else
                  return null;
      }

      private final AbstractController createControllerFromDevice(IDirectInputDevice device, Controller.Type type) {
            Component[] components = createComponents(device, false);
            AbstractController controller = new DIAbstractController(device, components, new Controller[]{}, device.getRumblers(), type);
            return controller;
      }

      private final Keyboard createKeyboardFromDevice(IDirectInputDevice device) {
            Component[] components = createComponents(device, false);
            return new DIKeyboard(device, components, new Controller[]{}, device.getRumblers());
      }

      private final Controller createControllerFromDevice(IDirectInputDevice device) {
            switch (device.getType()) {
                  case IDirectInputDevice.DI8DEVTYPE_MOUSE:
                        return createMouseFromDevice(device);
                  case IDirectInputDevice.DI8DEVTYPE_KEYBOARD:
                        return createKeyboardFromDevice(device);
                  case IDirectInputDevice.DI8DEVTYPE_GAMEPAD:
                        return createControllerFromDevice(device, Controller.Type.GAMEPAD);
                  case IDirectInputDevice.DI8DEVTYPE_DRIVING:
                        return createControllerFromDevice(device, Controller.Type.WHEEL);
                  case IDirectInputDevice.DI8DEVTYPE_1STPERSON:
                        /* Fall through */
                  case IDirectInputDevice.DI8DEVTYPE_FLIGHT:
                        /* Fall through */
                  case IDirectInputDevice.DI8DEVTYPE_JOYSTICK:
                        return createControllerFromDevice(device, Controller.Type.STICK);
                  default:
                        return createControllerFromDevice(device, Controller.Type.UNKNOWN);
            }
      }
      
      private final Controller[] enumControllers(DummyWindow window) throws IOException {
            List controllers = new ArrayList();
            IDirectInput dinput = new IDirectInput(window);
            try {
                  List devices = dinput.getDevices();
                  for (int i = 0; i < devices.size(); i++) {
                        IDirectInputDevice device = (IDirectInputDevice)devices.get(i);
                        Controller controller = createControllerFromDevice(device);
                        if (controller != null) {
                              controllers.add(controller);
                              active_devices.add(device);
                        } else
                              device.release();
                  }
            } finally {
                  dinput.release();
            }
            Controller[] controllers_array = new Controller[controllers.size()];
            controllers.toArray(controllers_array);
            return controllers_array;
      }

      private final class ShutdownHook extends Thread {
            public final void run() {
                  /* Release the devices to kill off active force feedback effects */
                  for (int i = 0; i < active_devices.size(); i++) {
                        IDirectInputDevice device = (IDirectInputDevice)active_devices.get(i);
                        device.release();
                  }
                  /* We won't release the window since it is
                   * owned by the thread that created the environment.
                   */
            }
      }

00251       public boolean isSupported() {
            return supported;
      }
} // class DirectInputEnvironment

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