1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import java.awt.event.InputEvent;
30 import java.awt.event.KeyEvent;
31 import java.awt.event.WindowEvent;
32 import java.awt.image.BufferedImage;
33 import java.awt.image.DataBuffer;
34 import java.awt.image.DataBufferInt;
35 import java.awt.image.ImageObserver;
36 import java.awt.image.ImageProducer;
37 import java.awt.image.Raster;
38 import java.awt.peer.FramePeer;
39 import java.awt.peer.KeyboardFocusManagerPeer;
40 import java.awt.peer.MouseInfoPeer;
41 import java.awt.peer.SystemTrayPeer;
42 import java.awt.peer.TrayIconPeer;
43 import java.io.File;
44 import java.io.IOException;
45 import java.io.InputStream;
46 import java.lang.reflect.InvocationTargetException;
47 import java.net.URL;
48 import java.security.AccessController;
49 import java.util.Collections;
50 import java.util.Iterator;
51 import java.util.Locale;
52 import java.util.Map;
53 import java.util.Vector;
54 import java.util.WeakHashMap;
55 import java.util.concurrent.TimeUnit;
56 import java.util.concurrent.locks.Condition;
57 import java.util.concurrent.locks.ReentrantLock;
58
59 import sun.awt.im.InputContext;
60 import sun.awt.image.ByteArrayImageSource;
61 import sun.awt.image.FileImageSource;
62 import sun.awt.image.ImageRepresentation;
63 import java.awt.image.MultiResolutionImage;
64 import sun.awt.image.MultiResolutionToolkitImage;
65 import sun.awt.image.ToolkitImage;
66 import sun.awt.image.URLImageSource;
67 import sun.font.FontDesignMetrics;
68 import sun.net.util.URLUtil;
69 import sun.security.action.GetBooleanAction;
70 import sun.security.action.GetPropertyAction;
71 import sun.util.logging.PlatformLogger;
72
73 import static java.awt.RenderingHints.*;
74
75 public abstract class SunToolkit extends Toolkit
76 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
77
78 // 8014718: logging has been removed from SunToolkit
79
80 /* Load debug settings for native code */
81 static {
82 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
83 DebugSettings.init();
84 }
85 };
86
87 /**
88 * Special mask for the UngrabEvent events, in addition to the
89 * public masks defined in AWTEvent. Should be used as the mask
90 * value for Toolkit.addAWTEventListener.
91 */
92 public static final int GRAB_EVENT_MASK = 0x80000000;
93
94 /* The key to put()/get() the PostEventQueue into/from the AppContext.
95 */
96 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
97
98 /**
99 * Number of buttons.
100 * By default it's taken from the system. If system value does not
101 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
102 */
103 protected static int numberOfButtons = 0;
104
105
106 /* XFree standard mention 24 buttons as maximum:
107 * http://www.xfree86.org/current/mouse.4.html
108 * We workaround systems supporting more than 24 buttons.
109 * Otherwise, we have to use long type values as masks
110 * which leads to API change.
111 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
112 * the 4-bytes limit for the int type. (CR 6799099)
113 * One more bit is reserved for FIRST_HIGH_BIT.
114 */
115 public static final int MAX_BUTTONS_SUPPORTED = 20;
116
117 /**
118 * Creates and initializes EventQueue instance for the specified
119 * AppContext.
120 * Note that event queue must be created from createNewAppContext()
121 * only in order to ensure that EventQueue constructor obtains
122 * the correct AppContext.
123 * @param appContext AppContext to associate with the event queue
124 */
125 private static void initEQ(AppContext appContext) {
126 EventQueue eventQueue = new EventQueue();
127 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
128
129 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
130 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
131 }
132
133 public SunToolkit() {
134 }
135
136 public boolean useBufferPerWindow() {
137 return false;
138 }
139
140 public abstract FramePeer createLightweightFrame(LightweightFrame target)
141 throws HeadlessException;
142
143 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
144 throws HeadlessException, AWTException;
145
146 public abstract SystemTrayPeer createSystemTray(SystemTray target);
147
148 public abstract boolean isTraySupported();
149
150 @Override
151 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
152 throws HeadlessException;
153
154 /**
155 * The AWT lock is typically only used on Unix platforms to synchronize
156 * access to Xlib, OpenGL, etc. However, these methods are implemented
157 * in SunToolkit so that they can be called from shared code (e.g.
158 * from the OGL pipeline) or from the X11 pipeline regardless of whether
159 * XToolkit or MToolkit is currently in use. There are native macros
160 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
161 * methods is changed, make sure it is compatible with the native macros.
162 *
163 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
164 * used in place of:
165 * synchronized (getAWTLock()) {
166 * ...
167 * }
168 *
169 * By factoring these methods out specially, we are able to change the
170 * implementation of these methods (e.g. use more advanced locking
171 * mechanisms) without impacting calling code.
172 *
173 * Sample usage:
174 * private void doStuffWithXlib() {
175 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
176 * SunToolkit.awtLock();
177 * try {
178 * ...
179 * XlibWrapper.XDoStuff();
180 * } finally {
181 * SunToolkit.awtUnlock();
182 * }
183 * }
184 */
185
186 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
187 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
188
189 public static final void awtLock() {
190 AWT_LOCK.lock();
191 }
192
193 public static final boolean awtTryLock() {
194 return AWT_LOCK.tryLock();
195 }
196
197 public static final void awtUnlock() {
198 AWT_LOCK.unlock();
199 }
200
201 public static final void awtLockWait()
202 throws InterruptedException
203 {
204 AWT_LOCK_COND.await();
205 }
206
207 public static final void awtLockWait(long timeout)
208 throws InterruptedException
209 {
210 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
211 }
212
213 public static final void awtLockNotify() {
214 AWT_LOCK_COND.signal();
215 }
216
217 public static final void awtLockNotifyAll() {
218 AWT_LOCK_COND.signalAll();
219 }
220
221 public static final boolean isAWTLockHeldByCurrentThread() {
222 return AWT_LOCK.isHeldByCurrentThread();
223 }
224
225 /*
226 * Create a new AppContext, along with its EventQueue, for a
227 * new ThreadGroup. Browser code, for example, would use this
228 * method to create an AppContext & EventQueue for an Applet.
229 */
230 public static AppContext createNewAppContext() {
231 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
232 return createNewAppContext(threadGroup);
233 }
234
235 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
236 // Create appContext before initialization of EventQueue, so all
237 // the calls to AppContext.getAppContext() from EventQueue ctor
238 // return correct values
239 AppContext appContext = new AppContext(threadGroup);
240 initEQ(appContext);
241
242 return appContext;
243 }
244
245 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
246 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
247 }
248
249 /*
250 * Fetch the peer associated with the given target (as specified
251 * in the peer creation method). This can be used to determine
252 * things like what the parent peer is. If the target is null
253 * or the target can't be found (either because the a peer was
254 * never created for it or the peer was disposed), a null will
255 * be returned.
256 */
257 protected static Object targetToPeer(Object target) {
258 if (target != null && !GraphicsEnvironment.isHeadless()) {
259 return AWTAutoShutdown.getInstance().getPeer(target);
260 }
261 return null;
262 }
263
264 protected static void targetCreatedPeer(Object target, Object peer) {
265 if (target != null && peer != null &&
266 !GraphicsEnvironment.isHeadless())
267 {
268 AWTAutoShutdown.getInstance().registerPeer(target, peer);
269 }
270 }
271
272 protected static void targetDisposedPeer(Object target, Object peer) {
273 if (target != null && peer != null &&
274 !GraphicsEnvironment.isHeadless())
275 {
276 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
277 }
278 }
279
280 // Maps from non-Component/MenuComponent to AppContext.
281 // WeakHashMap<Component,AppContext>
282 private static final Map<Object, AppContext> appContextMap =
283 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>());
284
285 /**
286 * Sets the appContext field of target. If target is not a Component or
287 * MenuComponent, this returns false.
288 */
289 private static boolean setAppContext(Object target,
290 AppContext context) {
291 if (target instanceof Component) {
292 AWTAccessor.getComponentAccessor().
293 setAppContext((Component)target, context);
294 } else if (target instanceof MenuComponent) {
295 AWTAccessor.getMenuComponentAccessor().
296 setAppContext((MenuComponent)target, context);
297 } else {
298 return false;
299 }
300 return true;
301 }
302
303 /**
304 * Returns the appContext field for target. If target is not a
305 * Component or MenuComponent this returns null.
306 */
307 private static AppContext getAppContext(Object target) {
308 if (target instanceof Component) {
309 return AWTAccessor.getComponentAccessor().
310 getAppContext((Component)target);
311 } else if (target instanceof MenuComponent) {
312 return AWTAccessor.getMenuComponentAccessor().
313 getAppContext((MenuComponent)target);
314 } else {
315 return null;
316 }
317 }
318
319 /*
320 * Fetch the AppContext associated with the given target.
321 * This can be used to determine things like which EventQueue
322 * to use for posting events to a Component. If the target is
323 * null or the target can't be found, a null with be returned.
324 */
325 public static AppContext targetToAppContext(Object target) {
326 if (target == null) {
327 return null;
328 }
329 AppContext context = getAppContext(target);
330 if (context == null) {
331 // target is not a Component/MenuComponent, try the
332 // appContextMap.
333 context = appContextMap.get(target);
334 }
335 return context;
336 }
337
338 /**
339 * Sets the synchronous status of focus requests on lightweight
340 * components in the specified window to the specified value.
341 * If the boolean parameter is {@code true} then the focus
342 * requests on lightweight components will be performed
343 * synchronously, if it is {@code false}, then asynchronously.
344 * By default, all windows have their lightweight request status
345 * set to asynchronous.
346 * <p>
347 * The application can only set the status of lightweight focus
348 * requests to synchronous for any of its windows if it doesn't
349 * perform focus transfers between different heavyweight containers.
350 * In this case the observable focus behaviour is the same as with
351 * asynchronous status.
352 * <p>
353 * If the application performs focus transfer between different
354 * heavyweight containers and sets the lightweight focus request
355 * status to synchronous for any of its windows, then further focus
356 * behaviour is unspecified.
357 * <p>
358 * @param changed the window for which the lightweight focus request
359 * status should be set
360 * @param status the value of lightweight focus request status
361 */
362
363 public static void setLWRequestStatus(Window changed,boolean status){
364 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
365 };
366
367 public static void checkAndSetPolicy(Container cont) {
368 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
369 getCurrentKeyboardFocusManager().
370 getDefaultFocusTraversalPolicy();
371
372 cont.setFocusTraversalPolicy(defaultPolicy);
373 }
374
375 /*
376 * Insert a mapping from target to AppContext, for later retrieval
377 * via targetToAppContext() above.
378 */
379 public static void insertTargetMapping(Object target, AppContext appContext) {
380 if (!setAppContext(target, appContext)) {
381 // Target is not a Component/MenuComponent, use the private Map
382 // instead.
383 appContextMap.put(target, appContext);
384 }
385 }
386
387 /*
388 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
389 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
390 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
391 * not be called under another lock since it locks the EventQueue.
392 * See bugids 4632918, 4526597.
393 */
394 public static void postEvent(AppContext appContext, AWTEvent event) {
395 if (event == null) {
396 throw new NullPointerException();
397 }
398
399 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
400 if (sea != null && sea.isSequencedEvent(event)) {
401 AWTEvent nested = sea.getNested(event);
402 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
403 nested instanceof TimedWindowEvent)
404 {
405 TimedWindowEvent twe = (TimedWindowEvent)nested;
406 ((SunToolkit)Toolkit.getDefaultToolkit()).
407 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
408 }
409 }
410
411 // All events posted via this method are system-generated.
412 // Placing the following call here reduces considerably the
413 // number of places throughout the toolkit that would
414 // otherwise have to be modified to precisely identify
415 // system-generated events.
416 setSystemGenerated(event);
417 AppContext eventContext = targetToAppContext(event.getSource());
418 if (eventContext != null && !eventContext.equals(appContext)) {
419 throw new RuntimeException("Event posted on wrong app context : " + event);
420 }
421 PostEventQueue postEventQueue =
422 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
423 if (postEventQueue != null) {
424 postEventQueue.postEvent(event);
425 }
426 }
427
428 /*
429 * Post AWTEvent of high priority.
430 */
431 public static void postPriorityEvent(final AWTEvent e) {
432 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
433 @Override
434 public void run() {
435 AWTAccessor.getAWTEventAccessor().setPosted(e);
436 ((Component)e.getSource()).dispatchEvent(e);
437 }
438 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
439 postEvent(targetToAppContext(e.getSource()), pe);
440 }
441
442 /*
443 * Flush any pending events which haven't been posted to the AWT
444 * EventQueue yet.
445 */
446 public static void flushPendingEvents() {
447 AppContext appContext = AppContext.getAppContext();
448 flushPendingEvents(appContext);
449 }
450
451 /*
452 * Flush the PostEventQueue for the right AppContext.
453 * The default flushPendingEvents only flushes the thread-local context,
454 * which is not always correct, c.f. 3746956
455 */
456 public static void flushPendingEvents(AppContext appContext) {
457 PostEventQueue postEventQueue =
458 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
459 if (postEventQueue != null) {
460 postEventQueue.flush();
461 }
462 }
463
464 /*
465 * Execute a chunk of code on the Java event handler thread for the
466 * given target. Does not wait for the execution to occur before
467 * returning to the caller.
468 */
469 public static void executeOnEventHandlerThread(Object target,
470 Runnable runnable) {
471 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
472 }
473
474 /*
475 * Fixed 5064013: the InvocationEvent time should be equals
476 * the time of the ActionEvent
477 */
478 @SuppressWarnings("serial")
479 public static void executeOnEventHandlerThread(Object target,
480 Runnable runnable,
481 final long when) {
482 executeOnEventHandlerThread(
483 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
484 @Override
485 public long getWhen() {
486 return when;
487 }
488 });
489 }
490
491 /*
492 * Execute a chunk of code on the Java event handler thread for the
493 * given target. Does not wait for the execution to occur before
494 * returning to the caller.
495 */
496 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
497 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
498 }
499
500 /*
501 * Execute a chunk of code on the Java event handler thread. The
502 * method takes into account provided AppContext and sets
503 * {@code SunToolkit.getDefaultToolkit()} as a target of the
504 * event. See 6451487 for detailes.
505 * Does not wait for the execution to occur before returning to
506 * the caller.
507 */
508 public static void invokeLaterOnAppContext(
509 AppContext appContext, Runnable dispatcher)
510 {
511 postEvent(appContext,
512 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
513 PeerEvent.PRIORITY_EVENT));
514 }
515
516 /*
517 * Execute a chunk of code on the Java event handler thread for the
518 * given target. Waits for the execution to occur before returning
519 * to the caller.
520 */
521 public static void executeOnEDTAndWait(Object target, Runnable runnable)
522 throws InterruptedException, InvocationTargetException
523 {
524 if (EventQueue.isDispatchThread()) {
525 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
526 }
527
528 class AWTInvocationLock {}
529 Object lock = new AWTInvocationLock();
530
531 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
532
533 synchronized (lock) {
534 executeOnEventHandlerThread(event);
535 while(!event.isDispatched()) {
536 lock.wait();
537 }
538 }
539
540 Throwable eventThrowable = event.getThrowable();
541 if (eventThrowable != null) {
542 throw new InvocationTargetException(eventThrowable);
543 }
544 }
545
546 /*
547 * Returns true if the calling thread is the event dispatch thread
548 * contained within AppContext which associated with the given target.
549 * Use this call to ensure that a given task is being executed
550 * (or not being) on the event dispatch thread for the given target.
551 */
552 public static boolean isDispatchThreadForAppContext(Object target) {
553 AppContext appContext = targetToAppContext(target);
554 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
555
556 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
557 return accessor.isDispatchThreadImpl(eq);
558 }
559
560 @Override
561 public Dimension getScreenSize() {
562 return new Dimension(getScreenWidth(), getScreenHeight());
563 }
564 protected abstract int getScreenWidth();
565 protected abstract int getScreenHeight();
566
567 @Override
568 @SuppressWarnings("deprecation")
569 public FontMetrics getFontMetrics(Font font) {
570 return FontDesignMetrics.getMetrics(font);
571 }
572
573 @Override
574 @SuppressWarnings("deprecation")
575 public String[] getFontList() {
576 String[] hardwiredFontList = {
577 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
578 Font.DIALOG_INPUT
579
580 // -- Obsolete font names from 1.0.2. It was decided that
581 // -- getFontList should not return these old names:
582 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
583 };
584 return hardwiredFontList;
585 }
586
587 /**
588 * Disables erasing of background on the canvas before painting if
589 * this is supported by the current toolkit. It is recommended to
590 * call this method early, before the Canvas becomes displayable,
591 * because some Toolkit implementations do not support changing
592 * this property once the Canvas becomes displayable.
593 */
594 public void disableBackgroundErase(Canvas canvas) {
595 disableBackgroundEraseImpl(canvas);
596 }
597
598 /**
599 * Disables the native erasing of the background on the given
600 * component before painting if this is supported by the current
601 * toolkit. This only has an effect for certain components such as
602 * Canvas, Panel and Window. It is recommended to call this method
603 * early, before the Component becomes displayable, because some
604 * Toolkit implementations do not support changing this property
605 * once the Component becomes displayable.
606 */
607 public void disableBackgroundErase(Component component) {
608 disableBackgroundEraseImpl(component);
609 }
610
611 private void disableBackgroundEraseImpl(Component component) {
612 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
613 }
614
615 /**
616 * Returns the value of "sun.awt.noerasebackground" property. Default
617 * value is {@code false}.
618 */
619 public static boolean getSunAwtNoerasebackground() {
620 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
621 }
622
623 /**
624 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
625 * value is {@code false}.
626 */
627 public static boolean getSunAwtErasebackgroundonresize() {
628 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
629 }
630
631
632 @SuppressWarnings("deprecation")
633 static final SoftCache fileImgCache = new SoftCache();
634
635 @SuppressWarnings("deprecation")
636 static final SoftCache urlImgCache = new SoftCache();
637
638 static Image getImageFromHash(Toolkit tk, URL url) {
639 checkPermissions(url);
640 synchronized (urlImgCache) {
641 String key = url.toString();
642 Image img = (Image)urlImgCache.get(key);
643 if (img == null) {
644 try {
645 img = tk.createImage(new URLImageSource(url));
646 urlImgCache.put(key, img);
647 } catch (Exception e) {
648 }
649 }
650 return img;
651 }
652 }
653
654 static Image getImageFromHash(Toolkit tk,
655 String filename) {
656 checkPermissions(filename);
657 synchronized (fileImgCache) {
658 Image img = (Image)fileImgCache.get(filename);
659 if (img == null) {
660 try {
661 img = tk.createImage(new FileImageSource(filename));
662 fileImgCache.put(filename, img);
663 } catch (Exception e) {
664 }
665 }
666 return img;
667 }
668 }
669
670 @Override
671 public Image getImage(String filename) {
672 return getImageFromHash(this, filename);
673 }
674
675 @Override
676 public Image getImage(URL url) {
677 return getImageFromHash(this, url);
678 }
679
680 protected Image getImageWithResolutionVariant(String fileName,
681 String resolutionVariantName) {
682 synchronized (fileImgCache) {
683 Image image = getImageFromHash(this, fileName);
684 if (image instanceof MultiResolutionImage) {
685 return image;
686 }
687 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
688 image = createImageWithResolutionVariant(image, resolutionVariant);
689 fileImgCache.put(fileName, image);
690 return image;
691 }
692 }
693
694 protected Image getImageWithResolutionVariant(URL url,
695 URL resolutionVariantURL) {
696 synchronized (urlImgCache) {
697 Image image = getImageFromHash(this, url);
698 if (image instanceof MultiResolutionImage) {
699 return image;
700 }
701 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
702 image = createImageWithResolutionVariant(image, resolutionVariant);
703 String key = url.toString();
704 urlImgCache.put(key, image);
705 return image;
706 }
707 }
708
709
710 @Override
711 public Image createImage(String filename) {
712 checkPermissions(filename);
713 return createImage(new FileImageSource(filename));
714 }
715
716 @Override
717 public Image createImage(URL url) {
718 checkPermissions(url);
719 return createImage(new URLImageSource(url));
720 }
721
722 @Override
723 public Image createImage(byte[] data, int offset, int length) {
724 return createImage(new ByteArrayImageSource(data, offset, length));
725 }
726
727 @Override
728 public Image createImage(ImageProducer producer) {
729 return new ToolkitImage(producer);
730 }
731
732 public static Image createImageWithResolutionVariant(Image image,
733 Image resolutionVariant) {
734 return new MultiResolutionToolkitImage(image, resolutionVariant);
735 }
736
737 @Override
738 public int checkImage(Image img, int w, int h, ImageObserver o) {
739 if (!(img instanceof ToolkitImage)) {
740 return ImageObserver.ALLBITS;
741 }
742
743 ToolkitImage tkimg = (ToolkitImage)img;
744 int repbits;
745 if (w == 0 || h == 0) {
746 repbits = ImageObserver.ALLBITS;
747 } else {
748 repbits = tkimg.getImageRep().check(o);
749 }
750 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
751 }
752
753 @Override
754 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
755 if (w == 0 || h == 0) {
756 return true;
757 }
758
759 // Must be a ToolkitImage
760 if (!(img instanceof ToolkitImage)) {
761 return true;
762 }
763
764 ToolkitImage tkimg = (ToolkitImage)img;
765 if (tkimg.hasError()) {
766 if (o != null) {
767 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
768 -1, -1, -1, -1);
769 }
770 return false;
771 }
772 ImageRepresentation ir = tkimg.getImageRep();
773 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
774 }
775
776 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
777 ToolkitImage rvImage = getResolutionVariant(img);
778 int rvw = getRVSize(w);
779 int rvh = getRVSize(h);
780 // Ignore the resolution variant in case of error
781 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
782 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
783 getResolutionVariantObserver(
784 img, o, w, h, rvw, rvh, true));
785 }
786
787 private boolean prepareResolutionVariant(Image img, int w, int h,
788 ImageObserver o) {
789
790 ToolkitImage rvImage = getResolutionVariant(img);
791 int rvw = getRVSize(w);
792 int rvh = getRVSize(h);
793 // Ignore the resolution variant in case of error
794 return rvImage == null || rvImage.hasError() || prepareImage(
795 rvImage, rvw, rvh,
796 MultiResolutionToolkitImage.getResolutionVariantObserver(
797 img, o, w, h, rvw, rvh, true));
798 }
799
800 private static int getRVSize(int size){
801 return size == -1 ? -1 : 2 * size;
802 }
803
804 private static ToolkitImage getResolutionVariant(Image image) {
805 if (image instanceof MultiResolutionToolkitImage) {
806 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
807 getResolutionVariant();
808 if (resolutionVariant instanceof ToolkitImage) {
809 return (ToolkitImage) resolutionVariant;
810 }
811 }
812 return null;
813 }
814
815 protected static boolean imageCached(String fileName) {
816 return fileImgCache.containsKey(fileName);
817 }
818
819 protected static boolean imageCached(URL url) {
820 String key = url.toString();
821 return urlImgCache.containsKey(key);
822 }
823
824 protected static boolean imageExists(String filename) {
825 if (filename != null) {
826 checkPermissions(filename);
827 return new File(filename).exists();
828 }
829 return false;
830 }
831
832 @SuppressWarnings("try")
833 protected static boolean imageExists(URL url) {
834 if (url != null) {
835 checkPermissions(url);
836 try (InputStream is = url.openStream()) {
837 return true;
838 }catch(IOException e){
839 return false;
840 }
841 }
842 return false;
843 }
844
845 private static void checkPermissions(String filename) {
846 SecurityManager security = System.getSecurityManager();
847 if (security != null) {
848 security.checkRead(filename);
849 }
850 }
851
852 private static void checkPermissions(URL url) {
853 SecurityManager sm = System.getSecurityManager();
854 if (sm != null) {
855 try {
856 java.security.Permission perm =
857 URLUtil.getConnectPermission(url);
858 if (perm != null) {
859 try {
860 sm.checkPermission(perm);
861 } catch (SecurityException se) {
862 // fallback to checkRead/checkConnect for pre 1.2
863 // security managers
864 if ((perm instanceof java.io.FilePermission) &&
865 perm.getActions().indexOf("read") != -1) {
866 sm.checkRead(perm.getName());
867 } else if ((perm instanceof
868 java.net.SocketPermission) &&
869 perm.getActions().indexOf("connect") != -1) {
870 sm.checkConnect(url.getHost(), url.getPort());
871 } else {
872 throw se;
873 }
874 }
875 }
876 } catch (java.io.IOException ioe) {
877 sm.checkConnect(url.getHost(), url.getPort());
878 }
879 }
880 }
881
882 /**
883 * Scans {@code imageList} for best-looking image of specified dimensions.
884 * Image can be scaled and/or padded with transparency.
885 */
886 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
887 if (width == 0 || height == 0) {
888 return null;
889 }
890 Image bestImage = null;
891 int bestWidth = 0;
892 int bestHeight = 0;
893 double bestSimilarity = 3; //Impossibly high value
894 double bestScaleFactor = 0;
895 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
896 //Iterate imageList looking for best matching image.
897 //'Similarity' measure is defined as good scale factor and small insets.
898 //best possible similarity is 0 (no scale, no insets).
899 //It's found while the experiments that good-looking result is achieved
900 //with scale factors x1, x3/4, x2/3, xN, x1/N.
901 Image im = i.next();
902 if (im == null) {
903 continue;
904 }
905 if (im instanceof ToolkitImage) {
906 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
907 ir.reconstruct(ImageObserver.ALLBITS);
908 }
909 int iw;
910 int ih;
911 try {
912 iw = im.getWidth(null);
913 ih = im.getHeight(null);
914 } catch (Exception e){
915 continue;
916 }
917 if (iw > 0 && ih > 0) {
918 //Calc scale factor
919 double scaleFactor = Math.min((double)width / (double)iw,
920 (double)height / (double)ih);
921 //Calculate scaled image dimensions
922 //adjusting scale factor to nearest "good" value
923 int adjw = 0;
924 int adjh = 0;
925 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
926 if (scaleFactor >= 2) {
927 //Need to enlarge image more than twice
928 //Round down scale factor to multiply by integer value
929 scaleFactor = Math.floor(scaleFactor);
930 adjw = iw * (int)scaleFactor;
931 adjh = ih * (int)scaleFactor;
932 scaleMeasure = 1.0 - 0.5 / scaleFactor;
933 } else if (scaleFactor >= 1) {
934 //Don't scale
935 scaleFactor = 1.0;
936 adjw = iw;
937 adjh = ih;
938 scaleMeasure = 0;
939 } else if (scaleFactor >= 0.75) {
940 //Multiply by 3/4
941 scaleFactor = 0.75;
942 adjw = iw * 3 / 4;
943 adjh = ih * 3 / 4;
944 scaleMeasure = 0.3;
945 } else if (scaleFactor >= 0.6666) {
946 //Multiply by 2/3
947 scaleFactor = 0.6666;
948 adjw = iw * 2 / 3;
949 adjh = ih * 2 / 3;
950 scaleMeasure = 0.33;
951 } else {
952 //Multiply size by 1/scaleDivider
953 //where scaleDivider is minimum possible integer
954 //larger than 1/scaleFactor
955 double scaleDivider = Math.ceil(1.0 / scaleFactor);
956 scaleFactor = 1.0 / scaleDivider;
957 adjw = (int)Math.round((double)iw / scaleDivider);
958 adjh = (int)Math.round((double)ih / scaleDivider);
959 scaleMeasure = 1.0 - 1.0 / scaleDivider;
960 }
961 double similarity = ((double)width - (double)adjw) / (double)width +
962 ((double)height - (double)adjh) / (double)height + //Large padding is bad
963 scaleMeasure; //Large rescale is bad
964 if (similarity < bestSimilarity) {
965 bestSimilarity = similarity;
966 bestScaleFactor = scaleFactor;
967 bestImage = im;
968 bestWidth = adjw;
969 bestHeight = adjh;
970 }
971 if (similarity == 0) break;
972 }
973 }
974 if (bestImage == null) {
975 //No images were found, possibly all are broken
976 return null;
977 }
978 BufferedImage bimage =
979 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
980 Graphics2D g = bimage.createGraphics();
981 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
982 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
983 try {
984 int x = (width - bestWidth) / 2;
985 int y = (height - bestHeight) / 2;
986 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
987 } finally {
988 g.dispose();
989 }
990 return bimage;
991 }
992
993 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
994 BufferedImage bimage = getScaledIconImage(imageList, width, height);
995 if (bimage == null) {
996 return null;
997 }
998 Raster raster = bimage.getRaster();
999 DataBuffer buffer = raster.getDataBuffer();
1000 return (DataBufferInt)buffer;
1001 }
1002
1003 @Override
1004 protected EventQueue getSystemEventQueueImpl() {
1005 return getSystemEventQueueImplPP();
1006 }
1007
1008 // Package private implementation
1009 static EventQueue getSystemEventQueueImplPP() {
1010 return getSystemEventQueueImplPP(AppContext.getAppContext());
1011 }
1012
1013 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1014 EventQueue theEventQueue =
1015 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1016 return theEventQueue;
1017 }
1018
1019 /**
1020 * Give native peers the ability to query the native container
1021 * given a native component (eg the direct parent may be lightweight).
1022 */
1023 public static Container getNativeContainer(Component c) {
1024 return Toolkit.getNativeContainer(c);
1025 }
1026
1027 /**
1028 * Gives native peers the ability to query the closest HW component.
1029 * If the given component is heavyweight, then it returns this. Otherwise,
1030 * it goes one level up in the hierarchy and tests next component.
1031 */
1032 public static Component getHeavyweightComponent(Component c) {
1033 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1034 c = AWTAccessor.getComponentAccessor().getParent(c);
1035 }
1036 return c;
1037 }
1038
1039 /**
1040 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1041 */
1042 public int getFocusAcceleratorKeyMask() {
1043 return InputEvent.ALT_MASK;
1044 }
1045
1046 /**
1047 * Tests whether specified key modifiers mask can be used to enter a printable
1048 * character. This is a default implementation of this method, which reflects
1049 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1050 * characters from the extended character set (like euro sign or math symbols)
1051 */
1052 public boolean isPrintableCharacterModifiersMask(int mods) {
1053 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1054 }
1055
1056 /**
1057 * Returns whether popup is allowed to be shown above the task bar.
1058 * This is a default implementation of this method, which checks
1059 * corresponding security permission.
1060 */
1061 public boolean canPopupOverlapTaskBar() {
1062 boolean result = true;
1063 try {
1064 SecurityManager sm = System.getSecurityManager();
1065 if (sm != null) {
1066 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1067 }
1068 } catch (SecurityException se) {
1069 // There is no permission to show popups over the task bar
1070 result = false;
1071 }
1072 return result;
1073 }
1074
1075 /**
1076 * Returns a new input method window, with behavior as specified in
1077 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1078 * If the inputContext is not null, the window should return it from its
1079 * getInputContext() method. The window needs to implement
1080 * sun.awt.im.InputMethodWindow.
1081 * <p>
1082 * SunToolkit subclasses can override this method to return better input
1083 * method windows.
1084 */
1085 @Override
1086 public Window createInputMethodWindow(String title, InputContext context) {
1087 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1088 }
1089
1090 /**
1091 * Returns whether enableInputMethods should be set to true for peered
1092 * TextComponent instances on this platform. False by default.
1093 */
1094 @Override
1095 public boolean enableInputMethodsForTextComponent() {
1096 return false;
1097 }
1098
1099 private static Locale startupLocale = null;
1100
1101 /**
1102 * Returns the locale in which the runtime was started.
1103 */
1104 public static Locale getStartupLocale() {
1105 if (startupLocale == null) {
1106 String language, region, country, variant;
1107 language = AccessController.doPrivileged(
1108 new GetPropertyAction("user.language", "en"));
1109 // for compatibility, check for old user.region property
1110 region = AccessController.doPrivileged(
1111 new GetPropertyAction("user.region"));
1112 if (region != null) {
1113 // region can be of form country, country_variant, or _variant
1114 int i = region.indexOf('_');
1115 if (i >= 0) {
1116 country = region.substring(0, i);
1117 variant = region.substring(i + 1);
1118 } else {
1119 country = region;
1120 variant = "";
1121 }
1122 } else {
1123 country = AccessController.doPrivileged(
1124 new GetPropertyAction("user.country", ""));
1125 variant = AccessController.doPrivileged(
1126 new GetPropertyAction("user.variant", ""));
1127 }
1128 startupLocale = new Locale(language, country, variant);
1129 }
1130 return startupLocale;
1131 }
1132
1133 /**
1134 * Returns the default keyboard locale of the underlying operating system
1135 */
1136 @Override
1137 public Locale getDefaultKeyboardLocale() {
1138 return getStartupLocale();
1139 }
1140
1141 /**
1142 * Returns whether default toolkit needs the support of the xembed
1143 * from embedding host(if any).
1144 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1145 */
1146 public static boolean needsXEmbed() {
1147 String noxembed = AccessController.
1148 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1149 if ("true".equals(noxembed)) {
1150 return false;
1151 }
1152
1153 Toolkit tk = Toolkit.getDefaultToolkit();
1154 if (tk instanceof SunToolkit) {
1155 // SunToolkit descendants should override this method to specify
1156 // concrete behavior
1157 return ((SunToolkit)tk).needsXEmbedImpl();
1158 } else {
1159 // Non-SunToolkit doubtly might support XEmbed
1160 return false;
1161 }
1162 }
1163
1164 /**
1165 * Returns whether this toolkit needs the support of the xembed
1166 * from embedding host(if any).
1167 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1168 */
1169 protected boolean needsXEmbedImpl() {
1170 return false;
1171 }
1172
1173 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1174
1175 /**
1176 * Returns whether the XEmbed server feature is requested by
1177 * developer. If true, Toolkit should return an
1178 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1179 */
1180 protected final boolean isXEmbedServerRequested() {
1181 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1182 }
1183
1184 /**
1185 * Returns whether the modal exclusion API is supported by the current toolkit.
1186 * When it isn't supported, calling {@code setModalExcluded} has no
1187 * effect, and {@code isModalExcluded} returns false for all windows.
1188 *
1189 * @return true if modal exclusion is supported by the toolkit, false otherwise
1190 *
1191 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1192 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1193 *
1194 * @since 1.5
1195 */
1196 public static boolean isModalExcludedSupported()
1197 {
1198 Toolkit tk = Toolkit.getDefaultToolkit();
1199 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1200 }
1201 /*
1202 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1203 *
1204 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1205 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1206 *
1207 * @since 1.5
1208 */
1209 protected boolean isModalExcludedSupportedImpl()
1210 {
1211 return false;
1212 }
1213
1214 /*
1215 * Sets this window to be excluded from being modally blocked. When the
1216 * toolkit supports modal exclusion and this method is called, input
1217 * events, focus transfer and z-order will continue to work for the
1218 * window, it's owned windows and child components, even in the
1219 * presence of a modal dialog.
1220 * For details on which {@code Window}s are normally blocked
1221 * by modal dialog, see {@link java.awt.Dialog}.
1222 * Invoking this method when the modal exclusion API is not supported by
1223 * the current toolkit has no effect.
1224 * @param window Window to be marked as not modally blocked
1225 * @see java.awt.Dialog
1226 * @see java.awt.Dialog#setModal(boolean)
1227 * @see sun.awt.SunToolkit#isModalExcludedSupported
1228 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1229 */
1230 public static void setModalExcluded(Window window)
1231 {
1232 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1233 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1234 }
1235 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1236 }
1237
1238 /*
1239 * Returns whether the specified window is blocked by modal dialogs.
1240 * If the modal exclusion API isn't supported by the current toolkit,
1241 * it returns false for all windows.
1242 *
1243 * @param window Window to test for modal exclusion
1244 *
1245 * @return true if the window is modal excluded, false otherwise. If
1246 * the modal exclusion isn't supported by the current Toolkit, false
1247 * is returned
1248 *
1249 * @see sun.awt.SunToolkit#isModalExcludedSupported
1250 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1251 *
1252 * @since 1.5
1253 */
1254 public static boolean isModalExcluded(Window window)
1255 {
1256 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1257 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1258 }
1259 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1260 }
1261
1262 /**
1263 * Overridden in XToolkit and WToolkit
1264 */
1265 @Override
1266 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1267 return (modalityType == Dialog.ModalityType.MODELESS) ||
1268 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1269 }
1270
1271 /**
1272 * Overridden in XToolkit and WToolkit
1273 */
1274 @Override
1275 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1276 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1277 }
1278
1279 ///////////////////////////////////////////////////////////////////////////
1280 //
1281 // The following is used by the Java Plug-in to coordinate dialog modality
1282 // between containing applications (browsers, ActiveX containers etc) and
1283 // the AWT.
1284 //
1285 ///////////////////////////////////////////////////////////////////////////
1286
1287 private ModalityListenerList modalityListeners = new ModalityListenerList();
1288
1289 public void addModalityListener(ModalityListener listener) {
1290 modalityListeners.add(listener);
1291 }
1292
1293 public void removeModalityListener(ModalityListener listener) {
1294 modalityListeners.remove(listener);
1295 }
1296
1297 public void notifyModalityPushed(Dialog dialog) {
1298 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1299 }
1300
1301 public void notifyModalityPopped(Dialog dialog) {
1302 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1303 }
1304
1305 final void notifyModalityChange(int id, Dialog source) {
1306 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1307 ev.dispatch();
1308 }
1309
1310 static class ModalityListenerList implements ModalityListener {
1311
1312 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1313
1314 void add(ModalityListener listener) {
1315 listeners.addElement(listener);
1316 }
1317
1318 void remove(ModalityListener listener) {
1319 listeners.removeElement(listener);
1320 }
1321
1322 @Override
1323 public void modalityPushed(ModalityEvent ev) {
1324 Iterator<ModalityListener> it = listeners.iterator();
1325 while (it.hasNext()) {
1326 it.next().modalityPushed(ev);
1327 }
1328 }
1329
1330 @Override
1331 public void modalityPopped(ModalityEvent ev) {
1332 Iterator<ModalityListener> it = listeners.iterator();
1333 while (it.hasNext()) {
1334 it.next().modalityPopped(ev);
1335 }
1336 }
1337 } // end of class ModalityListenerList
1338
1339 ///////////////////////////////////////////////////////////////////////////
1340 // End Plug-in code
1341 ///////////////////////////////////////////////////////////////////////////
1342
1343 public static boolean isLightweightOrUnknown(Component comp) {
1344 if (comp.isLightweight()
1345 || !(getDefaultToolkit() instanceof SunToolkit))
1346 {
1347 return true;
1348 }
1349 return !(comp instanceof Button
1350 || comp instanceof Canvas
1351 || comp instanceof Checkbox
1352 || comp instanceof Choice
1353 || comp instanceof Label
1354 || comp instanceof java.awt.List
1355 || comp instanceof Panel
1356 || comp instanceof Scrollbar
1357 || comp instanceof ScrollPane
1358 || comp instanceof TextArea
1359 || comp instanceof TextField
1360 || comp instanceof Window);
1361 }
1362
1363 @SuppressWarnings("serial")
1364 public static class OperationTimedOut extends RuntimeException {
1365 public OperationTimedOut(String msg) {
1366 super(msg);
1367 }
1368 public OperationTimedOut() {
1369 }
1370 }
1371
1372 @SuppressWarnings("serial")
1373 public static class InfiniteLoop extends RuntimeException {
1374 }
1375
1376 @SuppressWarnings("serial")
1377 public static class IllegalThreadException extends RuntimeException {
1378 public IllegalThreadException(String msg) {
1379 super(msg);
1380 }
1381 public IllegalThreadException() {
1382 }
1383 }
1384
1385 public static final int DEFAULT_WAIT_TIME = 10000;
1386 private static final int MAX_ITERS = 20;
1387 private static final int MIN_ITERS = 0;
1388 private static final int MINIMAL_EDELAY = 0;
1389
1390 /**
1391 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1392 */
1393 public void realSync() throws OperationTimedOut, InfiniteLoop {
1394 realSync(DEFAULT_WAIT_TIME);
1395 }
1396
1397 /**
1398 * Forces toolkit to synchronize with the native windowing
1399 * sub-system, flushing all pending work and waiting for all the
1400 * events to be processed. This method guarantees that after
1401 * return no additional Java events will be generated, unless
1402 * cause by user. Obviously, the method cannot be used on the
1403 * event dispatch thread (EDT). In case it nevertheless gets
1404 * invoked on this thread, the method throws the
1405 * IllegalThreadException runtime exception.
1406 *
1407 * <p> This method allows to write tests without explicit timeouts
1408 * or wait for some event. Example:
1409 * <pre>{@code
1410 * Frame f = ...;
1411 * f.setVisible(true);
1412 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1413 * }</pre>
1414 *
1415 * <p> After realSync, {@code f} will be completely visible
1416 * on the screen, its getLocationOnScreen will be returning the
1417 * right result and it will be the focus owner.
1418 *
1419 * <p> Another example:
1420 * <pre>{@code
1421 * b.requestFocus();
1422 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1423 * }</pre>
1424 *
1425 * <p> After realSync, {@code b} will be focus owner.
1426 *
1427 * <p> Notice that realSync isn't guaranteed to work if recurring
1428 * actions occur, such as if during processing of some event
1429 * another request which may generate some events occurs. By
1430 * default, sync tries to perform as much as {@value #MAX_ITERS}
1431 * cycles of event processing, allowing for roughly {@value
1432 * #MAX_ITERS} additional requests.
1433 *
1434 * <p> For example, requestFocus() generates native request, which
1435 * generates one or two Java focus events, which then generate a
1436 * serie of paint events, a serie of Java focus events, which then
1437 * generate a serie of paint events which then are processed -
1438 * three cycles, minimum.
1439 *
1440 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1441 */
1442 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1443 {
1444 if (EventQueue.isDispatchThread()) {
1445 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1446 }
1447 int bigLoop = 0;
1448 do {
1449 // Let's do sync first
1450 sync();
1451
1452 // During the wait process, when we were processing incoming
1453 // events, we could have made some new request, which can
1454 // generate new events. Example: MapNotify/XSetInputFocus.
1455 // Therefore, we dispatch them as long as there is something
1456 // to dispatch.
1457 int iters = 0;
1458 while (iters < MIN_ITERS) {
1459 syncNativeQueue(timeout);
1460 iters++;
1461 }
1462 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1463 iters++;
1464 }
1465 if (iters >= MAX_ITERS) {
1466 throw new InfiniteLoop();
1467 }
1468
1469 // native requests were dispatched by X/Window Manager or Windows
1470 // Moreover, we processed them all on Toolkit thread
1471 // Now wait while EDT processes them.
1472 //
1473 // During processing of some events (focus, for example),
1474 // some other events could have been generated. So, after
1475 // waitForIdle, we may end up with full EventQueue
1476 iters = 0;
1477 while (iters < MIN_ITERS) {
1478 waitForIdle(timeout);
1479 iters++;
1480 }
1481 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1482 iters++;
1483 }
1484 if (iters >= MAX_ITERS) {
1485 throw new InfiniteLoop();
1486 }
1487
1488 bigLoop++;
1489 // Again, for Java events, it was simple to check for new Java
1490 // events by checking event queue, but what if Java events
1491 // resulted in native requests? Therefor, check native events again.
1492 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1493 }
1494
1495 /**
1496 * Platform toolkits need to implement this method to perform the
1497 * sync of the native queue. The method should wait until native
1498 * requests are processed, all native events are processed and
1499 * corresponding Java events are generated. Should return
1500 * {@code true} if some events were processed,
1501 * {@code false} otherwise.
1502 */
1503 protected abstract boolean syncNativeQueue(final long timeout);
1504
1505 private boolean eventDispatched = false;
1506 private boolean queueEmpty = false;
1507 private final Object waitLock = new Object();
1508
1509 private boolean isEQEmpty() {
1510 EventQueue queue = getSystemEventQueueImpl();
1511 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1512 }
1513
1514 /**
1515 * Waits for the Java event queue to empty. Ensures that all
1516 * events are processed (including paint events), and that if
1517 * recursive events were generated, they are also processed.
1518 * Should return {@code true} if more processing is
1519 * necessary, {@code false} otherwise.
1520 */
1521 @SuppressWarnings("serial")
1522 protected final boolean waitForIdle(final long timeout) {
1523 flushPendingEvents();
1524 boolean queueWasEmpty = isEQEmpty();
1525 queueEmpty = false;
1526 eventDispatched = false;
1527 synchronized(waitLock) {
1528 postEvent(AppContext.getAppContext(),
1529 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1530 @Override
1531 public void dispatch() {
1532 // Here we block EDT. It could have some
1533 // events, it should have dispatched them by
1534 // now. So native requests could have been
1535 // generated. First, dispatch them. Then,
1536 // flush Java events again.
1537 int iters = 0;
1538 while (iters < MIN_ITERS) {
1539 syncNativeQueue(timeout);
1540 iters++;
1541 }
1542 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1543 iters++;
1544 }
1545 flushPendingEvents();
1546
1547 synchronized(waitLock) {
1548 queueEmpty = isEQEmpty();
1549 eventDispatched = true;
1550 waitLock.notifyAll();
1551 }
1552 }
1553 });
1554 try {
1555 while (!eventDispatched) {
1556 waitLock.wait();
1557 }
1558 } catch (InterruptedException ie) {
1559 return false;
1560 }
1561 }
1562
1563 try {
1564 Thread.sleep(MINIMAL_EDELAY);
1565 } catch (InterruptedException ie) {
1566 throw new RuntimeException("Interrupted");
1567 }
1568
1569 flushPendingEvents();
1570
1571 // Lock to force write-cache flush for queueEmpty.
1572 synchronized (waitLock) {
1573 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1574 }
1575 }
1576
1577 /**
1578 * Grabs the mouse input for the given window. The window must be
1579 * visible. The window or its children do not receive any
1580 * additional mouse events besides those targeted to them. All
1581 * other events will be dispatched as before - to the respective
1582 * targets. This Window will receive UngrabEvent when automatic
1583 * ungrab is about to happen. The event can be listened to by
1584 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1585 * UngrabEvent class for the list of conditions when ungrab is
1586 * about to happen.
1587 * @see UngrabEvent
1588 */
1589 public abstract void grab(Window w);
1590
1591 /**
1592 * Forces ungrab. No event will be sent.
1593 */
1594 public abstract void ungrab(Window w);
1595
1596
1597 /**
1598 * Locates the splash screen library in a platform dependent way and closes
1599 * the splash screen. Should be invoked on first top-level frame display.
1600 * @see java.awt.SplashScreen
1601 * @since 1.6
1602 */
1603 public static native void closeSplashScreen();
1604
1605 /* The following methods and variables are to support retrieving
1606 * desktop text anti-aliasing settings
1607 */
1608
1609 /* Need an instance method because setDesktopProperty(..) is protected. */
1610 private void fireDesktopFontPropertyChanges() {
1611 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1612 SunToolkit.getDesktopFontHints());
1613 }
1614
1615 private static boolean checkedSystemAAFontSettings;
1616 private static boolean useSystemAAFontSettings;
1617 private static boolean lastExtraCondition = true;
1618 private static RenderingHints desktopFontHints;
1619
1620 /* Since Swing is the reason for this "extra condition" logic its
1621 * worth documenting it in some detail.
1622 * First, a goal is for Swing and applications to both retrieve and
1623 * use the same desktop property value so that there is complete
1624 * consistency between the settings used by JDK's Swing implementation
1625 * and 3rd party custom Swing components, custom L&Fs and any general
1626 * text rendering that wants to be consistent with these.
1627 * But by default on Solaris & Linux Swing will not use AA text over
1628 * remote X11 display (unless Xrender can be used which is TBD and may not
1629 * always be available anyway) as that is a noticeable performance hit.
1630 * So there needs to be a way to express that extra condition so that
1631 * it is seen by all clients of the desktop property API.
1632 * If this were the only condition it could be handled here as it would
1633 * be the same for any L&F and could reasonably be considered to be
1634 * a static behaviour of those systems.
1635 * But GTK currently has an additional test based on locale which is
1636 * not applied by Metal. So mixing GTK in a few locales with Metal
1637 * would mean the last one wins.
1638 * This could be stored per-app context which would work
1639 * for different applets, but wouldn't help for a single application
1640 * using GTK and some other L&F concurrently.
1641 * But it is expected this will be addressed within GTK and the font
1642 * system so is a temporary and somewhat unlikely harmless corner case.
1643 */
1644 public static void setAAFontSettingsCondition(boolean extraCondition) {
1645 if (extraCondition != lastExtraCondition) {
1646 lastExtraCondition = extraCondition;
1647 if (checkedSystemAAFontSettings) {
1648 /* Someone already asked for this info, under a different
1649 * condition.
1650 * We'll force re-evaluation instead of replicating the
1651 * logic, then notify any listeners of any change.
1652 */
1653 checkedSystemAAFontSettings = false;
1654 Toolkit tk = Toolkit.getDefaultToolkit();
1655 if (tk instanceof SunToolkit) {
1656 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1657 }
1658 }
1659 }
1660 }
1661
1662 /* "false", "off", ""default" aren't explicitly tested, they
1663 * just fall through to produce a null return which all are equated to
1664 * "false".
1665 */
1666 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1667 Object aaHint = null;
1668 hintname = hintname.toLowerCase(Locale.ENGLISH);
1669 if (hintname.equals("on")) {
1670 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1671 } else if (hintname.equals("gasp")) {
1672 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1673 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1674 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1675 } else if (hintname.equals("lcd_hbgr")) {
1676 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1677 } else if (hintname.equals("lcd_vrgb")) {
1678 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1679 } else if (hintname.equals("lcd_vbgr")) {
1680 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1681 }
1682 if (aaHint != null) {
1683 RenderingHints map = new RenderingHints(null);
1684 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1685 return map;
1686 } else {
1687 return null;
1688 }
1689 }
1690
1691 /* This method determines whether to use the system font settings,
1692 * or ignore them if a L&F has specified they should be ignored, or
1693 * to override both of these with a system property specified value.
1694 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1695 * system property isn't applied as desktop properties are considered
1696 * to be inapplicable in that case. In that headless case although
1697 * this method will return "true" the toolkit will return a null map.
1698 */
1699 private static boolean useSystemAAFontSettings() {
1700 if (!checkedSystemAAFontSettings) {
1701 useSystemAAFontSettings = true; /* initially set this true */
1702 String systemAAFonts = null;
1703 Toolkit tk = Toolkit.getDefaultToolkit();
1704 if (tk instanceof SunToolkit) {
1705 systemAAFonts =
1706 AccessController.doPrivileged(
1707 new GetPropertyAction("awt.useSystemAAFontSettings"));
1708 }
1709 if (systemAAFonts != null) {
1710 useSystemAAFontSettings =
1711 Boolean.valueOf(systemAAFonts).booleanValue();
1712 /* If it is anything other than "true", then it may be
1713 * a hint name , or it may be "off, "default", etc.
1714 */
1715 if (!useSystemAAFontSettings) {
1716 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1717 }
1718 }
1719 /* If its still true, apply the extra condition */
1720 if (useSystemAAFontSettings) {
1721 useSystemAAFontSettings = lastExtraCondition;
1722 }
1723 checkedSystemAAFontSettings = true;
1724 }
1725 return useSystemAAFontSettings;
1726 }
1727
1728 /* A variable defined for the convenience of JDK code */
1729 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1730
1731 /* Overridden by subclasses to return platform/desktop specific values */
1732 protected RenderingHints getDesktopAAHints() {
1733 return null;
1734 }
1735
1736 /* Subclass desktop property loading methods call this which
1737 * in turn calls the appropriate subclass implementation of
1738 * getDesktopAAHints() when system settings are being used.
1739 * Its public rather than protected because subclasses may delegate
1740 * to a helper class.
1741 */
1742 public static RenderingHints getDesktopFontHints() {
1743 if (useSystemAAFontSettings()) {
1744 Toolkit tk = Toolkit.getDefaultToolkit();
1745 if (tk instanceof SunToolkit) {
1746 Object map = ((SunToolkit)tk).getDesktopAAHints();
1747 return (RenderingHints)map;
1748 } else { /* Headless Toolkit */
1749 return null;
1750 }
1751 } else if (desktopFontHints != null) {
1752 /* cloning not necessary as the return value is cloned later, but
1753 * its harmless.
1754 */
1755 return (RenderingHints)(desktopFontHints.clone());
1756 } else {
1757 return null;
1758 }
1759 }
1760
1761
1762 public abstract boolean isDesktopSupported();
1763 public abstract boolean isTaskbarSupported();
1764
1765 /*
1766 * consumeNextKeyTyped() method is not currently used,
1767 * however Swing could use it in the future.
1768 */
1769 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1770 try {
1771 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1772 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1773 getCurrentKeyboardFocusManager(),
1774 keyEvent);
1775 } catch (ClassCastException cce) {
1776 cce.printStackTrace();
1777 }
1778 }
1779
1780 protected static void dumpPeers(final PlatformLogger aLog) {
1781 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1782 }
1783
1784 /**
1785 * Returns the {@code Window} ancestor of the component {@code comp}.
1786 * @return Window ancestor of the component or component by itself if it is Window;
1787 * null, if component is not a part of window hierarchy
1788 */
1789 public static Window getContainingWindow(Component comp) {
1790 while (comp != null && !(comp instanceof Window)) {
1791 comp = comp.getParent();
1792 }
1793 return (Window)comp;
1794 }
1795
1796 private static Boolean sunAwtDisableMixing = null;
1797
1798 /**
1799 * Returns the value of "sun.awt.disableMixing" property. Default
1800 * value is {@code false}.
1801 */
1802 public static synchronized boolean getSunAwtDisableMixing() {
1803 if (sunAwtDisableMixing == null) {
1804 sunAwtDisableMixing = AccessController.doPrivileged(
1805 new GetBooleanAction("sun.awt.disableMixing"));
1806 }
1807 return sunAwtDisableMixing.booleanValue();
1808 }
1809
1810 /**
1811 * Returns true if the native GTK libraries are available. The
1812 * default implementation returns false, but UNIXToolkit overrides this
1813 * method to provide a more specific answer.
1814 */
1815 public boolean isNativeGTKAvailable() {
1816 return false;
1817 }
1818
1819 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1820
1821 public synchronized void setWindowDeactivationTime(Window w, long time) {
1822 AppContext ctx = getAppContext(w);
1823 if (ctx == null) {
1824 return;
1825 }
1826 @SuppressWarnings("unchecked")
1827 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1828 if (map == null) {
1829 map = new WeakHashMap<Window, Long>();
1830 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1831 }
1832 map.put(w, time);
1833 }
1834
1835 public synchronized long getWindowDeactivationTime(Window w) {
1836 AppContext ctx = getAppContext(w);
1837 if (ctx == null) {
1838 return -1;
1839 }
1840 @SuppressWarnings("unchecked")
1841 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1842 if (map == null) {
1843 return -1;
1844 }
1845 Long time = map.get(w);
1846 return time == null ? -1 : time;
1847 }
1848
1849 // Cosntant alpha
1850 public boolean isWindowOpacitySupported() {
1851 return false;
1852 }
1853
1854 // Shaping
1855 public boolean isWindowShapingSupported() {
1856 return false;
1857 }
1858
1859 // Per-pixel alpha
1860 public boolean isWindowTranslucencySupported() {
1861 return false;
1862 }
1863
1864 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1865 return false;
1866 }
1867
1868 /**
1869 * Returns true if swing backbuffer should be translucent.
1870 */
1871 public boolean isSwingBackbufferTranslucencySupported() {
1872 return false;
1873 }
1874
1875 /**
1876 * Returns whether or not a containing top level window for the passed
1877 * component is
1878 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1879 *
1880 * @param c a Component which toplevel's to check
1881 * @return {@code true} if the passed component is not null and has a
1882 * containing toplevel window which is opaque (so per-pixel translucency
1883 * is not enabled), {@code false} otherwise
1884 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1885 */
1886 public static boolean isContainingTopLevelOpaque(Component c) {
1887 Window w = getContainingWindow(c);
1888 return w != null && w.isOpaque();
1889 }
1890
1891 /**
1892 * Returns whether or not a containing top level window for the passed
1893 * component is
1894 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1895 *
1896 * @param c a Component which toplevel's to check
1897 * @return {@code true} if the passed component is not null and has a
1898 * containing toplevel window which has opacity less than
1899 * 1.0f (which means that it is translucent), {@code false} otherwise
1900 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1901 */
1902 public static boolean isContainingTopLevelTranslucent(Component c) {
1903 Window w = getContainingWindow(c);
1904 return w != null && w.getOpacity() < 1.0f;
1905 }
1906
1907 /**
1908 * Returns whether the native system requires using the peer.updateWindow()
1909 * method to update the contents of a non-opaque window, or if usual
1910 * painting procedures are sufficient. The default return value covers
1911 * the X11 systems. On MS Windows this method is overriden in WToolkit
1912 * to return true.
1913 */
1914 public boolean needUpdateWindow() {
1915 return false;
1916 }
1917
1918 /**
1919 * Descendants of the SunToolkit should override and put their own logic here.
1920 */
1921 public int getNumberOfButtons(){
1922 return 3;
1923 }
1924
1925 /**
1926 * Checks that the given object implements/extends the given
1927 * interface/class.
1928 *
1929 * Note that using the instanceof operator causes a class to be loaded.
1930 * Using this method doesn't load a class and it can be used instead of
1931 * the instanceof operator for performance reasons.
1932 *
1933 * @param obj Object to be checked
1934 * @param type The name of the interface/class. Must be
1935 * fully-qualified interface/class name.
1936 * @return true, if this object implements/extends the given
1937 * interface/class, false, otherwise, or if obj or type is null
1938 */
1939 public static boolean isInstanceOf(Object obj, String type) {
1940 if (obj == null) return false;
1941 if (type == null) return false;
1942
1943 return isInstanceOf(obj.getClass(), type);
1944 }
1945
1946 private static boolean isInstanceOf(Class<?> cls, String type) {
1947 if (cls == null) return false;
1948
1949 if (cls.getName().equals(type)) {
1950 return true;
1951 }
1952
1953 for (Class<?> c : cls.getInterfaces()) {
1954 if (c.getName().equals(type)) {
1955 return true;
1956 }
1957 }
1958 return isInstanceOf(cls.getSuperclass(), type);
1959 }
1960
1961 protected static LightweightFrame getLightweightFrame(Component c) {
1962 for (; c != null; c = c.getParent()) {
1963 if (c instanceof LightweightFrame) {
1964 return (LightweightFrame)c;
1965 }
1966 if (c instanceof Window) {
1967 // Don't traverse owner windows
1968 return null;
1969 }
1970 }
1971 return null;
1972 }
1973
1974 ///////////////////////////////////////////////////////////////////////////
1975 //
1976 // The following methods help set and identify whether a particular
1977 // AWTEvent object was produced by the system or by user code. As of this
1978 // writing the only consumer is the Java Plug-In, although this information
1979 // could be useful to more clients and probably should be formalized in
1980 // the public API.
1981 //
1982 ///////////////////////////////////////////////////////////////////////////
1983
1984 public static void setSystemGenerated(AWTEvent e) {
1985 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
1986 }
1987
1988 public static boolean isSystemGenerated(AWTEvent e) {
1989 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
1990 }
1991
1992 } // class SunToolkit
1993
1994
1995 /*
1996 * PostEventQueue is a Thread that runs in the same AppContext as the
1997 * Java EventQueue. It is a queue of AWTEvents to be posted to the
1998 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
1999 * events to this queue, which then calls EventQueue.postEvent().
2000 *
2001 * We do this because EventQueue.postEvent() may be overridden by client
2002 * code, and we mustn't ever call client code from the toolkit thread.
2003 */
2004 class PostEventQueue {
2005 private EventQueueItem queueHead = null;
2006 private EventQueueItem queueTail = null;
2007 private final EventQueue eventQueue;
2008
2009 private Thread flushThread = null;
2010
2011 PostEventQueue(EventQueue eq) {
2012 eventQueue = eq;
2013 }
2014
2015 /*
2016 * Continually post pending AWTEvents to the Java EventQueue. The method
2017 * is synchronized to ensure the flush is completed before a new event
2018 * can be posted to this queue.
2019 *
2020 * 7177040: The method couldn't be wholly synchronized because of calls
2021 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2022 * potentially lead to deadlock
2023 */
2024 public void flush() {
2025
2026 Thread newThread = Thread.currentThread();
2027
2028 try {
2029 EventQueueItem tempQueue;
2030 synchronized (this) {
2031 // Avoid method recursion
2032 if (newThread == flushThread) {
2033 return;
2034 }
2035 // Wait for other threads' flushing
2036 while (flushThread != null) {
2037 wait();
2038 }
2039 // Skip everything if queue is empty
2040 if (queueHead == null) {
2041 return;
2042 }
2043 // Remember flushing thread
2044 flushThread = newThread;
2045
2046 tempQueue = queueHead;
2047 queueHead = queueTail = null;
2048 }
2049 try {
2050 while (tempQueue != null) {
2051 eventQueue.postEvent(tempQueue.event);
2052 tempQueue = tempQueue.next;
2053 }
2054 }
2055 finally {
2056 // Only the flushing thread can get here
2057 synchronized (this) {
2058 // Forget flushing thread, inform other pending threads
2059 flushThread = null;
2060 notifyAll();
2061 }
2062 }
2063 }
2064 catch (InterruptedException e) {
2065 // Couldn't allow exception go up, so at least recover the flag
2066 newThread.interrupt();
2067 }
2068 }
2069
2070 /*
2071 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2072 */
2073 void postEvent(AWTEvent event) {
2074 EventQueueItem item = new EventQueueItem(event);
2075
2076 synchronized (this) {
2077 if (queueHead == null) {
2078 queueHead = queueTail = item;
2079 } else {
2080 queueTail.next = item;
2081 queueTail = item;
2082 }
2083 }
2084 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2085 }
2086 } // class PostEventQueue