/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.awt;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.KeyboardFocusManager;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.Window;
import java.awt.event.KeyEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.Collection;
import java.util.HashSet;
import javax.imageio.ImageIO;
import javax.naming.NameNotFoundException;
import org.apache.log4j.Logger;
import org.jnode.driver.ApiNotFoundException;
import org.jnode.driver.Device;
import org.jnode.driver.DeviceListener;
import org.jnode.driver.DeviceManager;
import org.jnode.driver.DeviceUtils;
import org.jnode.driver.input.KeyboardAPI;
import org.jnode.driver.input.KeyboardEvent;
import org.jnode.driver.input.KeyboardInterpreter;
import org.jnode.driver.input.KeyboardListener;
/**
* @author Levente S\u00e1ntha
*/
public class KeyboardHandler implements KeyboardListener {
//todo refactor this pattern to be generally available in JNode for AWT and text consoles as well
private static class KeyboardAPIHandler implements KeyboardAPI, DeviceListener {
private Collection<KeyboardAPI> keyboardList = new HashSet<KeyboardAPI>();
private Collection<KeyboardListener> listenerList = new HashSet<KeyboardListener>();
private KeyboardInterpreter interpreter;
KeyboardAPIHandler() {
try {
DeviceManager dm = DeviceUtils.getDeviceManager();
dm.addListener(this);
for (Device device : dm.getDevicesByAPI(KeyboardAPI.class)) {
try {
keyboardList.add(device.getAPI(KeyboardAPI.class));
} catch (ApiNotFoundException anfe) {
//ignore
}
}
} catch (NameNotFoundException nfe) {
//todo handle it
}
}
public void addKeyboardListener(KeyboardListener listener) {
listenerList.add(listener);
for (KeyboardAPI api : keyboardList) {
api.addKeyboardListener(listener);
}
}
public void removeKeyboardListener(KeyboardListener listener) {
listenerList.remove(listener);
for (KeyboardAPI api : keyboardList) {
api.removeKeyboardListener(listener);
}
}
public void setPreferredListener(KeyboardListener listener) {
for (KeyboardAPI api : keyboardList) {
api.setPreferredListener(listener);
}
}
public KeyboardInterpreter getKbInterpreter() {
return interpreter;
}
public void setKbInterpreter(KeyboardInterpreter kbInterpreter) {
this.interpreter = kbInterpreter;
for (KeyboardAPI api : keyboardList) {
api.setKbInterpreter(interpreter);
}
}
public void deviceStarted(Device device) {
if (device.implementsAPI(KeyboardAPI.class)) {
try {
KeyboardAPI api = device.getAPI(KeyboardAPI.class);
keyboardList.add(api);
for (KeyboardListener listener : listenerList) {
api.addKeyboardListener(listener);
}
} catch (ApiNotFoundException anfe) {
//ignore
}
}
}
public void deviceStop(Device device) {
if (device.implementsAPI(KeyboardAPI.class)) {
try {
KeyboardAPI api = device.getAPI(KeyboardAPI.class);
keyboardList.remove(api);
for (KeyboardListener listener : listenerList) {
api.removeKeyboardListener(listener);
}
} catch (ApiNotFoundException anfe) {
//ignore
}
}
}
boolean hasPointer() {
return !keyboardList.isEmpty();
}
}
/**
* My logger
*/
private static final Logger log = Logger.getLogger(KeyboardHandler.class);
/**
* The queue where to post the events
*/
@SuppressWarnings("unused")
private final EventQueue eventQueue;
/**
* The API of the actual keyboard
*/
private KeyboardAPI keyboardAPI;
private int modifiers;
private boolean pressed;
/**
* Initialize this instance.
*
* @param eventQueue
*/
public KeyboardHandler(EventQueue eventQueue) {
this.eventQueue = eventQueue;
this.keyboardAPI = new KeyboardAPIHandler();
this.keyboardAPI.addKeyboardListener(this);
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
keyboardAPI.setPreferredListener(KeyboardHandler.this);
return null;
}
});
}
/**
* @param event
*/
public void keyPressed(KeyboardEvent event) {
if (processSystemKey(event))
return;
int modifiers = event.getModifiers();
setModifiers(modifiers);
postEvent(KeyEvent.KEY_PRESSED, event.getTime(), modifiers, event.getKeyCode(), event.getKeyChar());
pressed = true;
event.consume();
char ch = event.getKeyChar();
if (ch != KeyEvent.CHAR_UNDEFINED && !event.isAltDown() && !event.isControlDown()) {
postEvent(KeyEvent.KEY_TYPED, event.getTime(),
event.getModifiers(), KeyEvent.VK_UNDEFINED, ch);
}
}
/**
* @param event
*/
public void keyReleased(KeyboardEvent event) {
int modifiers = event.getModifiers();
setModifiers(modifiers);
event.consume();
if (pressed) {
postEvent(KeyEvent.KEY_RELEASED, event.getTime(), modifiers,
event.getKeyCode(), event.getKeyChar());
pressed = false;
}
}
/**
* @param id
* @param modifiers
* @param keyCode
* @param keyChar
*/
private void postEvent(int id, long time, int modifiers, int keyCode,
char keyChar) {
Component source = null;
KeyboardFocusManager kfm = KeyboardFocusManager.getCurrentKeyboardFocusManager();
if (kfm != null) {
Component fo = kfm.getFocusOwner();
if (fo == null) {
Window win = kfm.getActiveWindow();
if (win == null) {
win = kfm.getFocusedWindow();
if (win != null) {
source = win;
}
} else {
source = win;
}
} else {
source = fo;
}
}
if (source == null) {
JNodeToolkit tk = (JNodeToolkit) Toolkit.getDefaultToolkit();
Frame top = tk.getTop();
if (top == null) {
//awt is not yet initialized
//drop this event
return;
} else {
source = top;
}
}
KeyEvent ke = new KeyEvent(source, id, time, modifiers, keyCode, keyChar);
JNodeToolkit.postToTarget(ke, source);
}
private boolean processSystemKey(KeyboardEvent event) {
final int key_code = event.getKeyCode();
if (key_code == KeyEvent.VK_F12 && event.isAltDown() ||
key_code == KeyEvent.VK_BACK_SPACE && event.isAltDown() && event.isControlDown()) {
event.consume();
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
JNodeToolkit.stopGui();
return null;
}
});
return true;
} else if (key_code == KeyEvent.VK_F11 && event.isAltDown()) {
event.consume();
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
JNodeToolkit.getJNodeToolkit().leaveGUI();
return null;
}
});
return true;
} else if (key_code == KeyEvent.VK_F5 && event.isControlDown() && event.isAltDown()) {
event.consume();
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
JNodeToolkit.refreshGui();
return null;
}
});
return true;
} else if (key_code == KeyEvent.VK_PRINTSCREEN ||
key_code == KeyEvent.VK_F10 && event.isAltDown() && event.isControlDown()) {
event.consume();
new Thread(new Runnable() {
public void run() {
try {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
try {
log.debug("Taking screenshot");
File f = File.createTempFile("screen", ".png",
new File(System.getProperty("java.io.tmpdir")));
Dimension ss = JNodeToolkit.getJNodeToolkit().getScreenSize();
BufferedImage capture =
new Robot().createScreenCapture(new Rectangle(0, 0, ss.width, ss.height));
log.debug("Saving screenshot to " + f);
ImageIO.write(capture, "png", f);
log.debug("Saved " + f);
} catch (Exception e) {
log.error("Error taking screenshot", e);
}
return null;
}
});
} catch (Exception x) {
log.error("", x);
}
}
}, "screenshot").start();
return true;
}
return false;
}
/**
* @return Returns the keyboardAPI.
*/
final KeyboardAPI getKeyboardAPI() {
return keyboardAPI;
}
synchronized int getModifiers() {
return modifiers;
}
private synchronized void setModifiers(int modifiers) {
this.modifiers = modifiers;
}
/**
* Install this handler as current keyboard focus manager.
*/
public void install() {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
//setCurrentKeyboardFocusManager(KeyboardHandler.this);
return null;
}
});
}
/**
* Uninstall this handler as current keyboard focus manager.
*/
public void uninstall() {
AccessController.doPrivileged(new PrivilegedAction<Void>() {
public Void run() {
//setCurrentKeyboardFocusManager(null);
return null;
}
});
}
/**
* Close this handler
*/
public void close() {
if (keyboardAPI != null) {
keyboardAPI.removeKeyboardListener(this);
}
uninstall();
}
}