/*
* Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package ae.sun.awt;
import ae.java.awt.*;
import static ae.java.awt.RenderingHints.*;
import ae.java.awt.dnd.*;
import ae.java.awt.dnd.peer.DragSourceContextPeer;
import ae.java.awt.peer.*;
import ae.java.awt.event.WindowEvent;
import ae.java.awt.event.KeyEvent;
//import ae.java.awt.im.spi.InputMethodDescriptor;
import ae.java.awt.image.*;
import ae.java.awt.geom.AffineTransform;
import ae.java.awt.TrayIcon;
import ae.java.awt.SystemTray;
import java.io.*;
import java.net.URL;
import java.net.JarURLConnection;
import java.util.*;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.ReentrantLock;
import java.util.logging.Level;
import java.util.logging.Logger;
import sun.misc.SoftCache;
import sun.security.action.GetPropertyAction;
import sun.security.action.GetBooleanAction;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;
//import ae.sun.awt.im.InputContext;
//import ae.sun.awt.im.SimpleInputMethodWindow;
import ae.sun.awt.image.*;
import ae.sun.font.FontDesignMetrics;
public abstract class SunToolkit extends Toolkit
implements WindowClosingSupport, WindowClosingListener,
ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
private static final Logger log = Logger.getLogger("ae.sun.awt.SunToolkit");
/* Load debug settings for native code */
static {
if (AccessController.doPrivileged(new GetBooleanAction("ae.sun.awt.nativedebug"))) {
DebugSettings.init();
}
};
/**
* Special mask for the UngrabEvent events, in addition to the
* public masks defined in AWTEvent. Should be used as the mask
* value for Toolkit.addAWTEventListener.
*/
public static final int GRAB_EVENT_MASK = 0x80000000;
private static Field syncLWRequestsField;
private static Method wakeupMethod;
private static Field componentKeyField;
private static Field menuComponentKeyField;
private static Field trayIconKeyField;
private static Field componentAppContextField;
private static Field menuComponentAppContextField;
private static Field isPostedField;
/* The key to put()/get() the PostEventQueue into/from the AppContext.
*/
private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
public SunToolkit() {
/* If awt.threadgroup is set to class name the instance of
* this class is created (should be subclass of ThreadGroup)
* and EventDispatchThread is created inside of it
*
* If loaded class overrides uncaughtException instance
* handles all uncaught exception on EventDispatchThread
*/
ThreadGroup threadGroup = null;
String tgName = System.getProperty("awt.threadgroup", "");
if (tgName.length() != 0) {
try {
Constructor ctor = Class.forName(tgName).
getConstructor(new Class[] {String.class});
threadGroup = (ThreadGroup)ctor.newInstance(new Object[] {"AWT-ThreadGroup"});
} catch (Exception e) {
System.err.println("Failed loading " + tgName + ": " + e);
}
}
Runnable initEQ = new Runnable() {
public void run () {
EventQueue eventQueue;
String eqName = System.getProperty("AWT.EventQueueClass",
"ae.java.awt.EventQueue");
try {
eventQueue = (EventQueue)Class.forName(eqName).newInstance();
} catch (Exception e) {
e.printStackTrace();
System.err.println("Failed loading " + eqName + ": " + e);
eventQueue = new EventQueue();
}
AppContext appContext = AppContext.getAppContext();
appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
}
};
if (threadGroup != null) {
Thread eqInitThread = new Thread(threadGroup, initEQ, "EventQueue-Init");
eqInitThread.start();
try {
eqInitThread.join();
} catch (InterruptedException e) {
e.printStackTrace();
}
} else {
initEQ.run();
}
}
public boolean useBufferPerWindow() {
return false;
}
public abstract WindowPeer createWindow(Window target)
throws HeadlessException;
public abstract FramePeer createFrame(Frame target)
throws HeadlessException;
public abstract DialogPeer createDialog(Dialog target)
throws HeadlessException;
public abstract ButtonPeer createButton(Button target)
throws HeadlessException;
public abstract TextFieldPeer createTextField(TextField target)
throws HeadlessException;
public abstract ChoicePeer createChoice(Choice target)
throws HeadlessException;
public abstract LabelPeer createLabel(Label target)
throws HeadlessException;
public abstract ListPeer createList(ae.java.awt.List target)
throws HeadlessException;
public abstract CheckboxPeer createCheckbox(Checkbox target)
throws HeadlessException;
public abstract ScrollbarPeer createScrollbar(Scrollbar target)
throws HeadlessException;
public abstract ScrollPanePeer createScrollPane(ScrollPane target)
throws HeadlessException;
public abstract TextAreaPeer createTextArea(TextArea target)
throws HeadlessException;
public abstract FileDialogPeer createFileDialog(FileDialog target)
throws HeadlessException;
public abstract MenuBarPeer createMenuBar(MenuBar target)
throws HeadlessException;
public abstract MenuPeer createMenu(Menu target)
throws HeadlessException;
public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
throws HeadlessException;
public abstract MenuItemPeer createMenuItem(MenuItem target)
throws HeadlessException;
public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
CheckboxMenuItem target)
throws HeadlessException;
public abstract DragSourceContextPeer createDragSourceContextPeer(
DragGestureEvent dge)
throws InvalidDnDOperationException;
public abstract TrayIconPeer createTrayIcon(TrayIcon target)
throws HeadlessException, AWTException;
public abstract SystemTrayPeer createSystemTray(SystemTray target);
public abstract boolean isTraySupported();
public abstract FontPeer getFontPeer(String name, int style);
public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
throws AWTException;
public KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager) throws HeadlessException {
KeyboardFocusManagerPeerImpl peer = new KeyboardFocusManagerPeerImpl(manager);
return peer;
}
/**
* The AWT lock is typically only used on Unix platforms to synchronize
* access to Xlib, OpenGL, etc. However, these methods are implemented
* in SunToolkit so that they can be called from shared code (e.g.
* from the OGL pipeline) or from the X11 pipeline regardless of whether
* XToolkit or MToolkit is currently in use. There are native macros
* (such as AWT_LOCK) defined in awt.h, so if the implementation of these
* methods is changed, make sure it is compatible with the native macros.
*
* Note: The following methods (awtLock(), awtUnlock(), etc) should be
* used in place of:
* synchronized (getAWTLock()) {
* ...
* }
*
* By factoring these methods out specially, we are able to change the
* implementation of these methods (e.g. use more advanced locking
* mechanisms) without impacting calling code.
*
* Sample usage:
* private void doStuffWithXlib() {
* assert !SunToolkit.isAWTLockHeldByCurrentThread();
* SunToolkit.awtLock();
* try {
* ...
* XlibWrapper.XDoStuff();
* } finally {
* SunToolkit.awtUnlock();
* }
* }
*/
private static final ReentrantLock AWT_LOCK = new ReentrantLock();
private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
public static final void awtLock() {
AWT_LOCK.lock();
}
public static final boolean awtTryLock() {
return AWT_LOCK.tryLock();
}
public static final void awtUnlock() {
AWT_LOCK.unlock();
}
public static final void awtLockWait()
throws InterruptedException
{
AWT_LOCK_COND.await();
}
public static final void awtLockWait(long timeout)
throws InterruptedException
{
AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
}
public static final void awtLockNotify() {
AWT_LOCK_COND.signal();
}
public static final void awtLockNotifyAll() {
AWT_LOCK_COND.signalAll();
}
public static final boolean isAWTLockHeldByCurrentThread() {
return AWT_LOCK.isHeldByCurrentThread();
}
/*
* Create a new AppContext, along with its EventQueue, for a
* new ThreadGroup. Browser code, for example, would use this
* method to create an AppContext & EventQueue for an Applet.
*/
public static AppContext createNewAppContext() {
ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
EventQueue eventQueue;
String eqName = System.getProperty("AWT.EventQueueClass",
"ae.java.awt.EventQueue");
try {
eventQueue = (EventQueue)Class.forName(eqName).newInstance();
} catch (Exception e) {
System.err.println("Failed loading " + eqName + ": " + e);
eventQueue = new EventQueue();
}
AppContext appContext = new AppContext(threadGroup);
appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
return appContext;
}
public static Field getField(final Class klass, final String fieldName) {
return AccessController.doPrivileged(new PrivilegedAction<Field>() {
public Field run() {
try {
Field field = klass.getDeclaredField(fieldName);
assert (field != null);
field.setAccessible(true);
return field;
} catch (SecurityException e) {
assert false;
} catch (NoSuchFieldException e) {
assert false;
}
return null;
}//run
});
}
static void wakeupEventQueue(EventQueue q, boolean isShutdown){
if (wakeupMethod == null){
wakeupMethod = (Method)AccessController.doPrivileged(new PrivilegedAction(){
public Object run(){
try {
Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} );
if (method != null) {
method.setAccessible(true);
}
return method;
} catch (NoSuchMethodException e) {
assert false;
} catch (SecurityException e) {
assert false;
}
return null;
}//run
});
}
try{
if (wakeupMethod != null){
wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)});
}
} catch (InvocationTargetException e){
assert false;
} catch (IllegalAccessException e) {
assert false;
}
}
/*
* Fetch the peer associated with the given target (as specified
* in the peer creation method). This can be used to determine
* things like what the parent peer is. If the target is null
* or the target can't be found (either because the a peer was
* never created for it or the peer was disposed), a null will
* be returned.
*/
protected static Object targetToPeer(Object target) {
if (target != null && !GraphicsEnvironment.isHeadless()) {
return AWTAutoShutdown.getInstance().getPeer(target);
}
return null;
}
protected static void targetCreatedPeer(Object target, Object peer) {
if (target != null && peer != null &&
!GraphicsEnvironment.isHeadless())
{
AWTAutoShutdown.getInstance().registerPeer(target, peer);
}
}
protected static void targetDisposedPeer(Object target, Object peer) {
if (target != null && peer != null &&
!GraphicsEnvironment.isHeadless())
{
AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
}
}
// Maps from non-Component/MenuComponent to AppContext.
// WeakHashMap<Component,AppContext>
private static final Map appContextMap =
Collections.synchronizedMap(new WeakHashMap());
/**
* Sets the appContext field of target. If target is not a Component or
* MenuComponent, this returns false.
*/
private static boolean setAppContext(Object target, AppContext context)
{
if (!(target instanceof Component) && !(target instanceof MenuComponent)) {
return false;
}
try{
if (target instanceof Component){
if (componentAppContextField == null) {
componentAppContextField = getField(Component.class, "appContext");
}
componentAppContextField.set(target, context);
} else if (target instanceof MenuComponent) {
if (menuComponentAppContextField == null) {
menuComponentAppContextField = getField(MenuComponent.class, "appContext");
}
menuComponentAppContextField.set(target, context);
}
} catch( IllegalAccessException e){
assert false;
}
return true;
}
/**
* Returns the appContext field for target. If target is not a
* Component or MenuComponent this returns null.
*/
private static AppContext getAppContext(Object target) {
AppContext retObj = null;
try{
if (target instanceof Component){
if (componentAppContextField == null) {
componentAppContextField = getField(Component.class, "appContext");
}
retObj = (AppContext) componentAppContextField.get(target);
} else if (target instanceof MenuComponent) {
if (menuComponentAppContextField == null) {
menuComponentAppContextField = getField(MenuComponent.class, "appContext");
}
retObj = (AppContext) menuComponentAppContextField.get(target);
}
} catch( IllegalAccessException e){
assert false;
}
return retObj;
}
/*
* Fetch the AppContext associated with the given target.
* This can be used to determine things like which EventQueue
* to use for posting events to a Component. If the target is
* null or the target can't be found, a null with be returned.
*/
public static AppContext targetToAppContext(Object target) {
if (target == null || GraphicsEnvironment.isHeadless()) {
return null;
}
AppContext context = getAppContext(target);
if (context == null) {
// target is not a Component/MenuComponent, try the
// appContextMap.
context = (AppContext)appContextMap.get(target);
}
return context;
}
/**
* Sets the synchronous status of focus requests on lightweight
* components in the specified window to the specified value.
* If the boolean parameter is <code>true</code> then the focus
* requests on lightweight components will be performed
* synchronously, if it is <code>false</code>, then asynchronously.
* By default, all windows have their lightweight request status
* set to asynchronous.
* <p>
* The application can only set the status of lightweight focus
* requests to synchronous for any of its windows if it doesn't
* perform focus transfers between different heavyweight containers.
* In this case the observable focus behaviour is the same as with
* asynchronous status.
* <p>
* If the application performs focus transfer between different
* heavyweight containers and sets the lightweight focus request
* status to synchronous for any of its windows, then further focus
* behaviour is unspecified.
* <p>
* @param w window for which the lightweight focus request status
* should be set
* @param status the value of lightweight focus request status
*/
public static void setLWRequestStatus(Window changed,boolean status){
if (syncLWRequestsField == null){
syncLWRequestsField = getField(Window.class, "syncLWRequests");
}
try{
if (syncLWRequestsField != null){
syncLWRequestsField.setBoolean(changed, status);
}
} catch( IllegalAccessException e){
assert false;
}
};
public static void checkAndSetPolicy(Container cont, boolean isSwingCont)
{
FocusTraversalPolicy defaultPolicy = KeyboardFocusManager
.getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy();
String toolkitName = Toolkit.getDefaultToolkit().getClass().getName();
// if this is not XAWT then use default policy
// because Swing change it
if (!"ae.sun.awt.X11.XToolkit".equals(toolkitName)) {
cont.setFocusTraversalPolicy(defaultPolicy);
return;
}
String policyName = defaultPolicy.getClass().getName();
if (DefaultFocusTraversalPolicy.class != defaultPolicy.getClass()) {
// Policy was changed
// Check if it is awt policy or swing policy
// If it is Swing policy we shouldn't use it in AWT frames
// If it is AWT policy we shouldn't use it in Swing frames
// Otherwise we should use this policy
if (policyName.startsWith("ae.java.awt.")) {
// AWT
if (isSwingCont) {
// Can't use AWT policy in Swing windows - should use Swing's one.
defaultPolicy = createLayoutPolicy();
} else {
// New awt policy.
}
} else if (policyName.startsWith("javax.swing.")) {
if (isSwingCont) {
// New Swing's policy
} else {
defaultPolicy = new DefaultFocusTraversalPolicy();
}
}
} else {
// Policy is default, use different default policy for swing
if (isSwingCont) {
defaultPolicy = createLayoutPolicy();
}
}
cont.setFocusTraversalPolicy(defaultPolicy);
}
private static FocusTraversalPolicy createLayoutPolicy() {
FocusTraversalPolicy policy = null;
try {
Class layoutPolicyClass =
Class.forName("javax.swing.LayoutFocusTraversalPolicy");
policy = (FocusTraversalPolicy) layoutPolicyClass.newInstance();
}
catch (ClassNotFoundException e) {
assert false;
}
catch (InstantiationException e) {
assert false;
}
catch (IllegalAccessException e) {
assert false;
}
return policy;
}
/*
* Insert a mapping from target to AppContext, for later retrieval
* via targetToAppContext() above.
*/
public static void insertTargetMapping(Object target, AppContext appContext) {
if (!GraphicsEnvironment.isHeadless()) {
if (!setAppContext(target, appContext)) {
// Target is not a Component/MenuComponent, use the private Map
// instead.
appContextMap.put(target, appContext);
}
}
}
/*
* Post an AWTEvent to the Java EventQueue, using the PostEventQueue
* to avoid possibly calling client code (EventQueueSubclass.postEvent())
* on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
* not be called under another lock since it locks the EventQueue.
* See bugids 4632918, 4526597.
*/
public static void postEvent(AppContext appContext, AWTEvent event) {
if (event == null) {
throw new NullPointerException();
}
AppContext eventContext = targetToAppContext(event.getSource());
if (eventContext != null && !eventContext.equals(appContext)) {
log.fine("Event posted on wrong app context : " + event);
}
PostEventQueue postEventQueue =
(PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
if(postEventQueue != null) {
postEventQueue.postEvent(event);
}
}
/*
* Post AWTEvent of high priority.
*/
public static void postPriorityEvent(final AWTEvent e) {
if (isPostedField == null) {
isPostedField = getField(AWTEvent.class, "isPosted");
}
PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
public void run() {
try {
isPostedField.setBoolean(e, true);
} catch (IllegalArgumentException e) {
assert(false);
} catch (IllegalAccessException e) {
assert(false);
}
((Component)e.getSource()).dispatchEvent(e);
}
}, PeerEvent.ULTIMATE_PRIORITY_EVENT);
postEvent(targetToAppContext(e.getSource()), pe);
}
/*
* Flush any pending events which haven't been posted to the AWT
* EventQueue yet.
*/
public static void flushPendingEvents() {
AppContext appContext = AppContext.getAppContext();
PostEventQueue postEventQueue =
(PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
if(postEventQueue != null) {
postEventQueue.flush();
}
}
public static boolean isPostEventQueueEmpty() {
AppContext appContext = AppContext.getAppContext();
PostEventQueue postEventQueue =
(PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
if (postEventQueue != null) {
return postEventQueue.noEvents();
} else {
return true;
}
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Does not wait for the execution to occur before
* returning to the caller.
*/
public static void executeOnEventHandlerThread(Object target,
Runnable runnable) {
executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
}
/*
* Fixed 5064013: the InvocationEvent time should be equals
* the time of the ActionEvent
*/
public static void executeOnEventHandlerThread(Object target,
Runnable runnable,
final long when) {
executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT){
public long getWhen(){
return when;
}
});
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Does not wait for the execution to occur before
* returning to the caller.
*/
public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
}
/*
* Execute a chunk of code on the Java event handler thread. The
* method takes into account provided AppContext and sets
* <code>SunToolkit.getDefaultToolkit()</code> as a target of the
* event. See 6451487 for detailes.
* Does not wait for the execution to occur before returning to
* the caller.
*/
public static void invokeLaterOnAppContext(
AppContext appContext, Runnable dispatcher)
{
postEvent(appContext,
new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
PeerEvent.PRIORITY_EVENT));
}
/*
* Execute a chunk of code on the Java event handler thread for the
* given target. Waits for the execution to occur before returning
* to the caller.
*/
public static void executeOnEDTAndWait(Object target, Runnable runnable)
throws InterruptedException, InvocationTargetException
{
if (EventQueue.isDispatchThread()) {
throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
}
class AWTInvocationLock {}
Object lock = new AWTInvocationLock();
PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
synchronized (lock) {
executeOnEventHandlerThread(event);
lock.wait();
}
Throwable eventThrowable = event.getThrowable();
if (eventThrowable != null) {
throw new InvocationTargetException(eventThrowable);
}
}
/*
* Returns next queue for the given EventQueue which has private access
*/
private static EventQueue getNextQueue(final Object o) {
EventQueue result = null;
try{
Field nextQueueField = getField(EventQueue.class,
"nextQueue");
result = (EventQueue)nextQueueField.get(o);
} catch( IllegalAccessException e){
assert false;
}
return result;
}
/*
* Returns dispatch thread for the given EventQueue which has private access
*/
private static Thread getDispatchThread(final Object o) {
Thread result = null;
try{
Field dispatchThreadField = getField(EventQueue.class,
"dispatchThread");
result = (Thread)dispatchThreadField.get(o);
} catch( IllegalAccessException e){
assert false;
}
return result;
}
/*
* Returns true if the calling thread is the event dispatch thread
* contained within AppContext which associated with the given target.
* Use this call to ensure that a given task is being executed
* (or not being) on the event dispatch thread for the given target.
*/
public static boolean isDispatchThreadForAppContext(Object target) {
AppContext appContext = targetToAppContext(target);
EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
EventQueue next = getNextQueue(eq);
while (next != null) {
eq = next;
next = getNextQueue(eq);
}
return (Thread.currentThread() == getDispatchThread(eq));
}
public Dimension getScreenSize() {
return new Dimension(getScreenWidth(), getScreenHeight());
}
protected abstract int getScreenWidth();
protected abstract int getScreenHeight();
public FontMetrics getFontMetrics(Font font) {
return FontDesignMetrics.getMetrics(font);
}
public String[] getFontList() {
String[] hardwiredFontList = {
Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
Font.DIALOG_INPUT
// -- Obsolete font names from 1.0.2. It was decided that
// -- getFontList should not return these old names:
// "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
};
return hardwiredFontList;
}
public PanelPeer createPanel(Panel target) {
return (PanelPeer)createComponent(target);
}
public CanvasPeer createCanvas(Canvas target) {
return (CanvasPeer)createComponent(target);
}
/**
* Disables erasing of background on the canvas before painting
* if this is supported by the current toolkit.
*
* @throws IllegalStateException if the canvas is not displayable
* @see ae.java.awt.Component#isDisplayable
*/
public void disableBackgroundErase(Canvas canvas) {
if (!canvas.isDisplayable()) {
throw new IllegalStateException("Canvas must have a valid peer");
}
}
/**
* Returns the value of "ae.sun.awt.noerasebackground" property. Default
* value is {@code false}.
*/
public static boolean getSunAwtNoerasebackground() {
return AccessController.doPrivileged(new GetBooleanAction("ae.sun.awt.noerasebackground"));
}
/**
* Returns the value of "ae.sun.awt.erasebackgroundonresize" property. Default
* value is {@code false}.
*/
public static boolean getSunAwtErasebackgroundonresize() {
return AccessController.doPrivileged(new GetBooleanAction("ae.sun.awt.erasebackgroundonresize"));
}
/**
* Makes the window OverrideRedirect, on X11 platforms. See
* ICCCM specification for more details about OverrideRedirect
* windows. Implemented in XToolkit, no-op in WToolkit.
*/
public void setOverrideRedirect(Window target) {
}
static SoftCache imgCache = new SoftCache();
static synchronized Image getImageFromHash(Toolkit tk, URL url) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
java.security.Permission perm =
url.openConnection().getPermission();
if (perm != null) {
try {
sm.checkPermission(perm);
} catch (SecurityException se) {
// fallback to checkRead/checkConnect for pre 1.2
// security managers
if ((perm instanceof java.io.FilePermission) &&
perm.getActions().indexOf("read") != -1) {
sm.checkRead(perm.getName());
} else if ((perm instanceof
java.net.SocketPermission) &&
perm.getActions().indexOf("connect") != -1) {
sm.checkConnect(url.getHost(), url.getPort());
} else {
throw se;
}
}
}
} catch (java.io.IOException ioe) {
sm.checkConnect(url.getHost(), url.getPort());
}
}
Image img = (Image)imgCache.get(url);
if (img == null) {
try {
img = tk.createImage(new URLImageSource(url));
imgCache.put(url, img);
} catch (Exception e) {
}
}
return img;
}
static synchronized Image getImageFromHash(Toolkit tk,
String filename) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkRead(filename);
}
Image img = (Image)imgCache.get(filename);
if (img == null) {
try {
img = tk.createImage(new FileImageSource(filename));
imgCache.put(filename, img);
} catch (Exception e) {
}
}
return img;
}
public Image getImage(String filename) {
return getImageFromHash(this, filename);
}
public Image getImage(URL url) {
return getImageFromHash(this, url);
}
public Image createImage(String filename) {
SecurityManager security = System.getSecurityManager();
if (security != null) {
security.checkRead(filename);
}
return createImage(new FileImageSource(filename));
}
public Image createImage(URL url) {
SecurityManager sm = System.getSecurityManager();
if (sm != null) {
try {
java.security.Permission perm =
url.openConnection().getPermission();
if (perm != null) {
try {
sm.checkPermission(perm);
} catch (SecurityException se) {
// fallback to checkRead/checkConnect for pre 1.2
// security managers
if ((perm instanceof java.io.FilePermission) &&
perm.getActions().indexOf("read") != -1) {
sm.checkRead(perm.getName());
} else if ((perm instanceof
java.net.SocketPermission) &&
perm.getActions().indexOf("connect") != -1) {
sm.checkConnect(url.getHost(), url.getPort());
} else {
throw se;
}
}
}
} catch (java.io.IOException ioe) {
sm.checkConnect(url.getHost(), url.getPort());
}
}
return createImage(new URLImageSource(url));
}
public Image createImage(byte[] data, int offset, int length) {
return createImage(new ByteArrayImageSource(data, offset, length));
}
public Image createImage(ImageProducer producer) {
return new ToolkitImage(producer);
}
public int checkImage(Image img, int w, int h, ImageObserver o) {
if (!(img instanceof ToolkitImage)) {
return ImageObserver.ALLBITS;
}
ToolkitImage tkimg = (ToolkitImage)img;
int repbits;
if (w == 0 || h == 0) {
repbits = ImageObserver.ALLBITS;
} else {
repbits = tkimg.getImageRep().check(o);
}
return tkimg.check(o) | repbits;
}
public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
if (w == 0 || h == 0) {
return true;
}
// Must be a ToolkitImage
if (!(img instanceof ToolkitImage)) {
return true;
}
ToolkitImage tkimg = (ToolkitImage)img;
if (tkimg.hasError()) {
if (o != null) {
o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
-1, -1, -1, -1);
}
return false;
}
ImageRepresentation ir = tkimg.getImageRep();
return ir.prepare(o);
}
/**
* Scans {@code imageList} for best-looking image of specified dimensions.
* Image can be scaled and/or padded with transparency.
*/
public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
if (width == 0 || height == 0) {
return null;
}
Image bestImage = null;
int bestWidth = 0;
int bestHeight = 0;
double bestSimilarity = 3; //Impossibly high value
double bestScaleFactor = 0;
for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
//Iterate imageList looking for best matching image.
//'Similarity' measure is defined as good scale factor and small insets.
//best possible similarity is 0 (no scale, no insets).
//It's found while the experiments that good-looking result is achieved
//with scale factors x1, x3/4, x2/3, xN, x1/N.
Image im = i.next();
if (im == null) {
if (log.isLoggable(Level.FINER)) {
log.log(Level.FINER, "SunToolkit.getScaledIconImage: " +
"Skipping the image passed into Java because it's null.");
}
continue;
}
if (im instanceof ToolkitImage) {
ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
ir.reconstruct(ImageObserver.ALLBITS);
}
int iw;
int ih;
try {
iw = im.getWidth(null);
ih = im.getHeight(null);
} catch (Exception e){
if (log.isLoggable(Level.FINER)) {
log.log(Level.FINER, "SunToolkit.getScaledIconImage: " +
"Perhaps the image passed into Java is broken. Skipping this icon.");
}
continue;
}
if (iw > 0 && ih > 0) {
//Calc scale factor
double scaleFactor = Math.min((double)width / (double)iw,
(double)height / (double)ih);
//Calculate scaled image dimensions
//adjusting scale factor to nearest "good" value
int adjw = 0;
int adjh = 0;
double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
if (scaleFactor >= 2) {
//Need to enlarge image more than twice
//Round down scale factor to multiply by integer value
scaleFactor = Math.floor(scaleFactor);
adjw = iw * (int)scaleFactor;
adjh = ih * (int)scaleFactor;
scaleMeasure = 1.0 - 0.5 / scaleFactor;
} else if (scaleFactor >= 1) {
//Don't scale
scaleFactor = 1.0;
adjw = iw;
adjh = ih;
scaleMeasure = 0;
} else if (scaleFactor >= 0.75) {
//Multiply by 3/4
scaleFactor = 0.75;
adjw = iw * 3 / 4;
adjh = ih * 3 / 4;
scaleMeasure = 0.3;
} else if (scaleFactor >= 0.6666) {
//Multiply by 2/3
scaleFactor = 0.6666;
adjw = iw * 2 / 3;
adjh = ih * 2 / 3;
scaleMeasure = 0.33;
} else {
//Multiply size by 1/scaleDivider
//where scaleDivider is minimum possible integer
//larger than 1/scaleFactor
double scaleDivider = Math.ceil(1.0 / scaleFactor);
scaleFactor = 1.0 / scaleDivider;
adjw = (int)Math.round((double)iw / scaleDivider);
adjh = (int)Math.round((double)ih / scaleDivider);
scaleMeasure = 1.0 - 1.0 / scaleDivider;
}
double similarity = ((double)width - (double)adjw) / (double)width +
((double)height - (double)adjh) / (double)height + //Large padding is bad
scaleMeasure; //Large rescale is bad
if (similarity < bestSimilarity) {
bestSimilarity = similarity;
bestScaleFactor = scaleFactor;
bestImage = im;
bestWidth = adjw;
bestHeight = adjh;
}
if (similarity == 0) break;
}
}
if (bestImage == null) {
//No images were found, possibly all are broken
return null;
}
BufferedImage bimage =
new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g = bimage.createGraphics();
g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
try {
int x = (width - bestWidth) / 2;
int y = (height - bestHeight) / 2;
if (log.isLoggable(Level.FINER)) {
log.log(Level.FINER, "WWindowPeer.getScaledIconData() result : " +
"w : " + width + " h : " + height +
" iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
" sim : " + bestSimilarity + " sf : " + bestScaleFactor +
" adjW : " + bestWidth + " adjH : " + bestHeight +
" x : " + x + " y : " + y);
}
g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
} finally {
g.dispose();
}
return bimage;
}
public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
BufferedImage bimage = getScaledIconImage(imageList, width, height);
if (bimage == null) {
if (log.isLoggable(Level.FINER)) {
log.log(Level.FINER, "SunToolkit.getScaledIconData: " +
"Perhaps the image passed into Java is broken. Skipping this icon.");
}
return null;
}
Raster raster = bimage.getRaster();
DataBuffer buffer = raster.getDataBuffer();
return (DataBufferInt)buffer;
}
protected EventQueue getSystemEventQueueImpl() {
return getSystemEventQueueImplPP();
}
// Package private implementation
static EventQueue getSystemEventQueueImplPP() {
return getSystemEventQueueImplPP(AppContext.getAppContext());
}
public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
EventQueue theEventQueue =
(EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
return theEventQueue;
}
/**
* Give native peers the ability to query the native container
* given a native component (eg the direct parent may be lightweight).
*/
public static Container getNativeContainer(Component c) {
return Toolkit.getNativeContainer(c);
}
/**
* Returns a new input method window, with behavior as specified in
* {@link ae.java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
* If the inputContext is not null, the window should return it from its
* getInputContext() method. The window needs to implement
* ae.sun.awt.im.InputMethodWindow.
* <p>
* SunToolkit subclasses can override this method to return better input
* method windows.
*/
// public Window createInputMethodWindow(String title, InputContext context) {
// return new ae.sun.awt.im.SimpleInputMethodWindow(title, context);
// }
/**
* Returns whether enableInputMethods should be set to true for peered
* TextComponent instances on this platform. False by default.
*/
public boolean enableInputMethodsForTextComponent() {
return false;
}
private static Locale startupLocale = null;
/**
* Returns the locale in which the runtime was started.
*/
public static Locale getStartupLocale() {
if (startupLocale == null) {
String language, region, country, variant;
language = (String) AccessController.doPrivileged(
new GetPropertyAction("user.language", "en"));
// for compatibility, check for old user.region property
region = (String) AccessController.doPrivileged(
new GetPropertyAction("user.region"));
if (region != null) {
// region can be of form country, country_variant, or _variant
int i = region.indexOf('_');
if (i >= 0) {
country = region.substring(0, i);
variant = region.substring(i + 1);
} else {
country = region;
variant = "";
}
} else {
country = (String) AccessController.doPrivileged(
new GetPropertyAction("user.country", ""));
variant = (String) AccessController.doPrivileged(
new GetPropertyAction("user.variant", ""));
}
startupLocale = new Locale(language, country, variant);
}
return startupLocale;
}
/**
* Returns the default keyboard locale of the underlying operating system
*/
public Locale getDefaultKeyboardLocale() {
return getStartupLocale();
}
private static String dataTransfererClassName = null;
protected static void setDataTransfererClassName(String className) {
dataTransfererClassName = className;
}
public static String getDataTransfererClassName() {
if (dataTransfererClassName == null) {
Toolkit.getDefaultToolkit(); // transferer set during toolkit init
}
return dataTransfererClassName;
}
// Support for window closing event notifications
private transient WindowClosingListener windowClosingListener = null;
/**
* @see ae.sun.awt.WindowClosingSupport#getWindowClosingListener
*/
public WindowClosingListener getWindowClosingListener() {
return windowClosingListener;
}
/**
* @see ae.sun.awt.WindowClosingSupport#setWindowClosingListener
*/
public void setWindowClosingListener(WindowClosingListener wcl) {
windowClosingListener = wcl;
}
/**
* @see ae.sun.awt.WindowClosingListener#windowClosingNotify
*/
public RuntimeException windowClosingNotify(WindowEvent event) {
if (windowClosingListener != null) {
return windowClosingListener.windowClosingNotify(event);
} else {
return null;
}
}
/**
* @see ae.sun.awt.WindowClosingListener#windowClosingDelivered
*/
public RuntimeException windowClosingDelivered(WindowEvent event) {
if (windowClosingListener != null) {
return windowClosingListener.windowClosingDelivered(event);
} else {
return null;
}
}
private static DefaultMouseInfoPeer mPeer = null;
protected synchronized MouseInfoPeer getMouseInfoPeer() {
if (mPeer == null) {
mPeer = new DefaultMouseInfoPeer();
}
return mPeer;
}
/**
* Returns whether default toolkit needs the support of the xembed
* from embedding host(if any).
* @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
*/
public static boolean needsXEmbed() {
String noxembed = (String) AccessController.
doPrivileged(new GetPropertyAction("ae.sun.awt.noxembed", "false"));
if ("true".equals(noxembed)) {
return false;
}
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
// SunToolkit descendants should override this method to specify
// concrete behavior
return ((SunToolkit)tk).needsXEmbedImpl();
} else {
// Non-SunToolkit doubtly might support XEmbed
return false;
}
}
/**
* Returns whether this toolkit needs the support of the xembed
* from embedding host(if any).
* @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
*/
protected boolean needsXEmbedImpl() {
return false;
}
private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE;
static {
DEFAULT_MODAL_EXCLUSION_TYPE = (Dialog.ModalExclusionType)AccessController.doPrivileged(new PrivilegedAction() {
public Object run() {
Dialog.ModalExclusionType defaultType = Dialog.ModalExclusionType.NO_EXCLUDE;
try {
java.lang.reflect.Field f = Dialog.class.getDeclaredField("DEFAULT_MODAL_EXCLUSION_TYPE");
f.setAccessible(true);
defaultType = (Dialog.ModalExclusionType)f.get(null);
} catch (Exception e) {
}
return defaultType;
}
});
}
/**
* Returns whether the XEmbed server feature is requested by
* developer. If true, Toolkit should return an
* XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
*/
protected final boolean isXEmbedServerRequested() {
return AccessController.doPrivileged(new GetBooleanAction("ae.sun.awt.xembedserver"));
}
/**
* Returns whether the modal exclusion API is supported by the current toolkit.
* When it isn't supported, calling <code>setModalExcluded</code> has no
* effect, and <code>isModalExcluded</code> returns false for all windows.
*
* @return true if modal exclusion is supported by the toolkit, false otherwise
*
* @see ae.sun.awt.SunToolkit#setModalExcluded(ae.java.awt.Window)
* @see ae.sun.awt.SunToolkit#isModalExcluded(ae.java.awt.Window)
*
* @since 1.5
*/
public static boolean isModalExcludedSupported()
{
Toolkit tk = Toolkit.getDefaultToolkit();
return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
}
/*
* Default implementation for isModalExcludedSupportedImpl(), returns false.
*
* @see ae.sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
* @see ae.sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
*
* @since 1.5
*/
protected boolean isModalExcludedSupportedImpl()
{
return false;
}
/*
* Sets this window to be excluded from being modally blocked. When the
* toolkit supports modal exclusion and this method is called, input
* events, focus transfer and z-order will continue to work for the
* window, it's owned windows and child components, even in the
* presence of a modal dialog.
* For details on which <code>Window</code>s are normally blocked
* by modal dialog, see {@link ae.java.awt.Dialog}.
* Invoking this method when the modal exclusion API is not supported by
* the current toolkit has no effect.
* @param window Window to be marked as not modally blocked
* @see ae.java.awt.Dialog
* @see ae.java.awt.Dialog#setModal(boolean)
* @see ae.sun.awt.SunToolkit#isModalExcludedSupported
* @see ae.sun.awt.SunToolkit#isModalExcluded(ae.java.awt.Window)
*/
public static void setModalExcluded(Window window)
{
window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
}
/*
* Returns whether the specified window is blocked by modal dialogs.
* If the modal exclusion API isn't supported by the current toolkit,
* it returns false for all windows.
*
* @param window Window to test for modal exclusion
*
* @return true if the window is modal excluded, false otherwise. If
* the modal exclusion isn't supported by the current Toolkit, false
* is returned
*
* @see ae.sun.awt.SunToolkit#isModalExcludedSupported
* @see ae.sun.awt.SunToolkit#setModalExcluded(ae.java.awt.Window)
*
* @since 1.5
*/
public static boolean isModalExcluded(Window window)
{
return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
}
/**
* Overridden in XToolkit and WToolkit
*/
public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
return (modalityType == Dialog.ModalityType.MODELESS) ||
(modalityType == Dialog.ModalityType.APPLICATION_MODAL);
}
/**
* Overridden in XToolkit and WToolkit
*/
public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
}
///////////////////////////////////////////////////////////////////////////
//
// The following is used by the Java Plug-in to coordinate dialog modality
// between containing applications (browsers, ActiveX containers etc) and
// the AWT.
//
///////////////////////////////////////////////////////////////////////////
private ModalityListenerList modalityListeners = new ModalityListenerList();
public void addModalityListener(ModalityListener listener) {
modalityListeners.add(listener);
}
public void removeModalityListener(ModalityListener listener) {
modalityListeners.remove(listener);
}
public void notifyModalityPushed(Dialog dialog) {
notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
}
public void notifyModalityPopped(Dialog dialog) {
notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
}
final void notifyModalityChange(int id, Dialog source) {
ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
ev.dispatch();
}
static class ModalityListenerList implements ModalityListener {
Vector<ModalityListener> listeners = new Vector<ModalityListener>();
void add(ModalityListener listener) {
listeners.addElement(listener);
}
void remove(ModalityListener listener) {
listeners.removeElement(listener);
}
public void modalityPushed(ModalityEvent ev) {
Iterator<ModalityListener> it = listeners.iterator();
while (it.hasNext()) {
it.next().modalityPushed(ev);
}
}
public void modalityPopped(ModalityEvent ev) {
Iterator<ModalityListener> it = listeners.iterator();
while (it.hasNext()) {
it.next().modalityPopped(ev);
}
}
} // end of class ModalityListenerList
///////////////////////////////////////////////////////////////////////////
// End Plug-in code
///////////////////////////////////////////////////////////////////////////
public static boolean isLightweightOrUnknown(Component comp) {
if (comp.isLightweight()
|| !(getDefaultToolkit() instanceof SunToolkit))
{
return true;
}
return !(comp instanceof Button
|| comp instanceof Canvas
|| comp instanceof Checkbox
|| comp instanceof Choice
|| comp instanceof Label
|| comp instanceof ae.java.awt.List
|| comp instanceof Panel
|| comp instanceof Scrollbar
|| comp instanceof ScrollPane
|| comp instanceof TextArea
|| comp instanceof TextField
|| comp instanceof Window);
}
public static Method getMethod(final Class clz, final String methodName, final Class[] params) {
Method res = null;
try {
res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
public Method run() throws Exception {
Method m = clz.getDeclaredMethod(methodName, params);
m.setAccessible(true);
return m;
}
});
} catch (PrivilegedActionException ex) {
ex.printStackTrace();
}
return res;
}
public static class OperationTimedOut extends RuntimeException {
public OperationTimedOut(String msg) {
super(msg);
}
public OperationTimedOut() {
}
}
public static class InfiniteLoop extends RuntimeException {
}
public static class IllegalThreadException extends RuntimeException {
public IllegalThreadException(String msg) {
super(msg);
}
public IllegalThreadException() {
}
}
public static final int DEFAULT_WAIT_TIME = 10000;
private static final int MAX_ITERS = 20;
private static final int MIN_ITERS = 0;
private static final int MINIMAL_EDELAY = 0;
/**
* Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
*/
public void realSync() throws OperationTimedOut, InfiniteLoop {
realSync(DEFAULT_WAIT_TIME);
}
/**
* Forces toolkit to synchronize with the native windowing
* sub-system, flushing all pending work and waiting for all the
* events to be processed. This method guarantees that after
* return no additional Java events will be generated, unless
* cause by user. Obviously, the method cannot be used on the
* event dispatch thread (EDT). In case it nevertheless gets
* invoked on this thread, the method throws the
* IllegalThreadException runtime exception.
*
* <p> This method allows to write tests without explicit timeouts
* or wait for some event. Example:
* <code>
* Frame f = ...;
* f.setVisible(true);
* ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
* </code>
*
* <p> After realSync, <code>f</code> will be completely visible
* on the screen, its getLocationOnScreen will be returning the
* right result and it will be the focus owner.
*
* <p> Another example:
* <code>
* b.requestFocus();
* ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
* </code>
*
* <p> After realSync, <code>b</code> will be focus owner.
*
* <p> Notice that realSync isn't guaranteed to work if recurring
* actions occur, such as if during processing of some event
* another request which may generate some events occurs. By
* default, sync tries to perform as much as {@value MAX_ITERS}
* cycles of event processing, allowing for roughly {@value
* MAX_ITERS} additional requests.
*
* <p> For example, requestFocus() generates native request, which
* generates one or two Java focus events, which then generate a
* serie of paint events, a serie of Java focus events, which then
* generate a serie of paint events which then are processed -
* three cycles, minimum.
*
* @param timeout the maximum time to wait in milliseconds, negative means "forever".
*/
public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
{
if (EventQueue.isDispatchThread()) {
throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
}
int bigLoop = 0;
do {
// Let's do sync first
sync();
// During the wait process, when we were processing incoming
// events, we could have made some new request, which can
// generate new events. Example: MapNotify/XSetInputFocus.
// Therefore, we dispatch them as long as there is something
// to dispatch.
int iters = 0;
while (iters < MIN_ITERS) {
syncNativeQueue(timeout);
iters++;
}
while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
iters++;
}
if (iters >= MAX_ITERS) {
throw new InfiniteLoop();
}
// native requests were dispatched by X/Window Manager or Windows
// Moreover, we processed them all on Toolkit thread
// Now wait while EDT processes them.
//
// During processing of some events (focus, for example),
// some other events could have been generated. So, after
// waitForIdle, we may end up with full EventQueue
iters = 0;
while (iters < MIN_ITERS) {
waitForIdle(timeout);
iters++;
}
while (waitForIdle(timeout) && iters < MAX_ITERS) {
iters++;
}
if (iters >= MAX_ITERS) {
throw new InfiniteLoop();
}
bigLoop++;
// Again, for Java events, it was simple to check for new Java
// events by checking event queue, but what if Java events
// resulted in native requests? Therefor, check native events again.
} while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
}
/**
* Platform toolkits need to implement this method to perform the
* sync of the native queue. The method should wait until native
* requests are processed, all native events are processed and
* corresponding Java events are generated. Should return
* <code>true</code> if some events were processed,
* <code>false</code> otherwise.
*/
protected abstract boolean syncNativeQueue(final long timeout);
private boolean eventDispatched = false;
private boolean queueEmpty = false;
private final Object waitLock = "Wait Lock";
static Method eqNoEvents;
private boolean isEQEmpty() {
EventQueue queue = getSystemEventQueueImpl();
synchronized(SunToolkit.class) {
if (eqNoEvents == null) {
eqNoEvents = getMethod(ae.java.awt.EventQueue.class, "noEvents", null);
}
}
try {
return (Boolean)eqNoEvents.invoke(queue);
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
/**
* Waits for the Java event queue to empty. Ensures that all
* events are processed (including paint events), and that if
* recursive events were generated, they are also processed.
* Should return <code>true</code> if more processing is
* necessary, <code>false</code> otherwise.
*/
protected final boolean waitForIdle(final long timeout) {
flushPendingEvents();
boolean queueWasEmpty = isEQEmpty();
queueEmpty = false;
eventDispatched = false;
synchronized(waitLock) {
postEvent(AppContext.getAppContext(),
new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
public void dispatch() {
// Here we block EDT. It could have some
// events, it should have dispatched them by
// now. So native requests could have been
// generated. First, dispatch them. Then,
// flush Java events again.
int iters = 0;
while (iters < MIN_ITERS) {
syncNativeQueue(timeout);
iters++;
}
while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
iters++;
}
flushPendingEvents();
synchronized(waitLock) {
queueEmpty = isEQEmpty();
eventDispatched = true;
waitLock.notifyAll();
}
}
});
try {
while (!eventDispatched) {
waitLock.wait();
}
} catch (InterruptedException ie) {
return false;
}
}
try {
Thread.sleep(MINIMAL_EDELAY);
} catch (InterruptedException ie) {
throw new RuntimeException("Interrupted");
}
flushPendingEvents();
// Lock to force write-cache flush for queueEmpty.
synchronized (waitLock) {
return !(queueEmpty && isEQEmpty() && queueWasEmpty);
}
}
/**
* Grabs the mouse input for the given window. The window must be
* visible. The window or its children do not receive any
* additional mouse events besides those targeted to them. All
* other events will be dispatched as before - to the respective
* targets. This Window will receive UngrabEvent when automatic
* ungrab is about to happen. The event can be listened to by
* installing AWTEventListener with WINDOW_EVENT_MASK. See
* UngrabEvent class for the list of conditions when ungrab is
* about to happen.
* @see UngrabEvent
*/
public abstract void grab(Window w);
/**
* Forces ungrab. No event will be sent.
*/
public abstract void ungrab(Window w);
/**
* Locates the splash screen library in a platform dependent way and closes
* the splash screen. Should be invoked on first top-level frame display.
* @see ae.java.awt.SplashScreen
* @since 1.6
*/
public static native void closeSplashScreen();
/* The following methods and variables are to support retrieving
* desktop text anti-aliasing settings
*/
/* Need an instance method because setDesktopProperty(..) is protected. */
private void fireDesktopFontPropertyChanges() {
setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
SunToolkit.getDesktopFontHints());
}
private static boolean checkedSystemAAFontSettings;
private static boolean useSystemAAFontSettings;
private static boolean lastExtraCondition = true;
private static RenderingHints desktopFontHints;
/* Since Swing is the reason for this "extra condition" logic its
* worth documenting it in some detail.
* First, a goal is for Swing and applications to both retrieve and
* use the same desktop property value so that there is complete
* consistency between the settings used by JDK's Swing implementation
* and 3rd party custom Swing components, custom L&Fs and any general
* text rendering that wants to be consistent with these.
* But by default on Solaris & Linux Swing will not use AA text over
* remote X11 display (unless Xrender can be used which is TBD and may not
* always be available anyway) as that is a noticeable performance hit.
* So there needs to be a way to express that extra condition so that
* it is seen by all clients of the desktop property API.
* If this were the only condition it could be handled here as it would
* be the same for any L&F and could reasonably be considered to be
* a static behaviour of those systems.
* But GTK currently has an additional test based on locale which is
* not applied by Metal. So mixing GTK in a few locales with Metal
* would mean the last one wins.
* This could be stored per-app context which would work
* for different applets, but wouldn't help for a single application
* using GTK and some other L&F concurrently.
* But it is expected this will be addressed within GTK and the font
* system so is a temporary and somewhat unlikely harmless corner case.
*/
public static void setAAFontSettingsCondition(boolean extraCondition) {
if (extraCondition != lastExtraCondition) {
lastExtraCondition = extraCondition;
if (checkedSystemAAFontSettings) {
/* Someone already asked for this info, under a different
* condition.
* We'll force re-evaluation instead of replicating the
* logic, then notify any listeners of any change.
*/
checkedSystemAAFontSettings = false;
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
((SunToolkit)tk).fireDesktopFontPropertyChanges();
}
}
}
}
/* "false", "off", ""default" aren't explicitly tested, they
* just fall through to produce a null return which all are equated to
* "false".
*/
private static RenderingHints getDesktopAAHintsByName(String hintname) {
Object aaHint = null;
hintname = hintname.toLowerCase(Locale.ENGLISH);
if (hintname.equals("on")) {
aaHint = VALUE_TEXT_ANTIALIAS_ON;
} else if (hintname.equals("gasp")) {
aaHint = VALUE_TEXT_ANTIALIAS_GASP;
} else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
} else if (hintname.equals("lcd_hbgr")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
} else if (hintname.equals("lcd_vrgb")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
} else if (hintname.equals("lcd_vbgr")) {
aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
}
if (aaHint != null) {
RenderingHints map = new RenderingHints(null);
map.put(KEY_TEXT_ANTIALIASING, aaHint);
return map;
} else {
return null;
}
}
/* This method determines whether to use the system font settings,
* or ignore them if a L&F has specified they should be ignored, or
* to override both of these with a system property specified value.
* If the toolkit isn't a SunToolkit, (eg may be headless) then that
* system property isn't applied as desktop properties are considered
* to be inapplicable in that case. In that headless case although
* this method will return "true" the toolkit will return a null map.
*/
private static boolean useSystemAAFontSettings() {
if (!checkedSystemAAFontSettings) {
useSystemAAFontSettings = true; /* initially set this true */
String systemAAFonts = null;
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
systemAAFonts =
(String)AccessController.doPrivileged(
new GetPropertyAction("awt.useSystemAAFontSettings"));
}
if (systemAAFonts != null) {
useSystemAAFontSettings =
Boolean.valueOf(systemAAFonts).booleanValue();
/* If it is anything other than "true", then it may be
* a hint name , or it may be "off, "default", etc.
*/
if (!useSystemAAFontSettings) {
desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
}
}
/* If its still true, apply the extra condition */
if (useSystemAAFontSettings) {
useSystemAAFontSettings = lastExtraCondition;
}
checkedSystemAAFontSettings = true;
}
return useSystemAAFontSettings;
}
/* A variable defined for the convenience of JDK code */
public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
/* Overridden by subclasses to return platform/desktop specific values */
protected RenderingHints getDesktopAAHints() {
return null;
}
/* Subclass desktop property loading methods call this which
* in turn calls the appropriate subclass implementation of
* getDesktopAAHints() when system settings are being used.
* Its public rather than protected because subclasses may delegate
* to a helper class.
*/
public static RenderingHints getDesktopFontHints() {
if (useSystemAAFontSettings()) {
Toolkit tk = Toolkit.getDefaultToolkit();
if (tk instanceof SunToolkit) {
Object map = ((SunToolkit)tk).getDesktopAAHints();
return (RenderingHints)map;
} else { /* Headless Toolkit */
return null;
}
} else if (desktopFontHints != null) {
/* cloning not necessary as the return value is cloned later, but
* its harmless.
*/
return (RenderingHints)(desktopFontHints.clone());
} else {
return null;
}
}
public abstract boolean isDesktopSupported();
/*
* consumeNextKeyTyped() method is not currently used,
* however Swing could use it in the future.
*/
private static Method consumeNextKeyTypedMethod = null;
public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
if (consumeNextKeyTypedMethod == null) {
consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
"consumeNextKeyTyped",
new Class[] {KeyEvent.class});
}
try {
consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
keyEvent);
} catch (IllegalAccessException iae) {
iae.printStackTrace();
} catch (InvocationTargetException ite) {
ite.printStackTrace();
}
}
protected static void dumpPeers(final Logger aLog) {
AWTAutoShutdown.getInstance().dumpPeers(aLog);
}
/**
* Returns true if the native GTK libraries are available. The
* default implementation returns false, but UNIXToolkit overrides this
* method to provide a more specific answer.
*/
public boolean isNativeGTKAvailable() {
return false;
}
} // class SunToolkit
/*
* PostEventQueue is a Thread that runs in the same AppContext as the
* Java EventQueue. It is a queue of AWTEvents to be posted to the
* Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
* events to this queue, which then calls EventQueue.postEvent().
*
* We do this because EventQueue.postEvent() may be overridden by client
* code, and we mustn't ever call client code from the toolkit thread.
*/
class PostEventQueue {
private EventQueueItem queueHead = null;
private EventQueueItem queueTail = null;
private final EventQueue eventQueue;
PostEventQueue(EventQueue eq) {
eventQueue = eq;
}
public boolean noEvents() {
return queueHead == null;
}
/*
* Continually post pending AWTEvents to the Java EventQueue.
*/
public void flush() {
if (queueHead != null) {
EventQueueItem tempQueue;
/*
* We have to execute the loop inside the synchronized block
* to ensure that the flush is completed before a new event
* can be posted to this queue.
*/
synchronized (this) {
tempQueue = queueHead;
queueHead = queueTail = null;
/*
* If this PostEventQueue is flushed in parallel on two
* different threads tempQueue will be null for one of them.
*/
while (tempQueue != null) {
eventQueue.postEvent(tempQueue.event);
tempQueue = tempQueue.next;
}
}
}
}
/*
* Enqueue an AWTEvent to be posted to the Java EventQueue.
*/
void postEvent(AWTEvent event) {
EventQueueItem item = new EventQueueItem(event);
synchronized (this) {
if (queueHead == null) {
queueHead = queueTail = item;
} else {
queueTail.next = item;
queueTail = item;
}
}
SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
}
} // class PostEventQueue