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.ArrayList;
50 import java.util.Collections;
51 import java.util.Iterator;
52 import java.util.Locale;
53 import java.util.Map;
54 import java.util.Vector;
55 import java.util.WeakHashMap;
56 import java.util.concurrent.TimeUnit;
57 import java.util.concurrent.locks.Condition;
58 import java.util.concurrent.locks.ReentrantLock;
59
60 import sun.awt.im.InputContext;
61 import sun.awt.image.ByteArrayImageSource;
62 import sun.awt.image.FileImageSource;
63 import sun.awt.image.ImageRepresentation;
64 import java.awt.image.MultiResolutionImage;
65 import sun.awt.image.MultiResolutionToolkitImage;
66 import sun.awt.image.ToolkitImage;
67 import sun.awt.image.URLImageSource;
68 import sun.font.FontDesignMetrics;
69 import sun.net.util.URLUtil;
70 import sun.security.action.GetBooleanAction;
71 import sun.security.action.GetPropertyAction;
72 import sun.util.logging.PlatformLogger;
73
74 import static java.awt.RenderingHints.*;
75
76 public abstract class SunToolkit extends Toolkit
77 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
78
79 // 8014718: logging has been removed from SunToolkit
80
81 /* Load debug settings for native code */
82 static {
83 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
84 DebugSettings.init();
85 }
86 };
87
88 /**
89 * Special mask for the UngrabEvent events, in addition to the
90 * public masks defined in AWTEvent. Should be used as the mask
91 * value for Toolkit.addAWTEventListener.
92 */
93 public static final int GRAB_EVENT_MASK = 0x80000000;
94
95 /* The key to put()/get() the PostEventQueue into/from the AppContext.
96 */
97 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
98
99 /**
100 * Number of buttons.
101 * By default it's taken from the system. If system value does not
102 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
103 */
104 protected static int numberOfButtons = 0;
105
106
107 /* XFree standard mention 24 buttons as maximum:
108 * http://www.xfree86.org/current/mouse.4.html
109 * We workaround systems supporting more than 24 buttons.
110 * Otherwise, we have to use long type values as masks
111 * which leads to API change.
112 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
113 * the 4-bytes limit for the int type. (CR 6799099)
114 * One more bit is reserved for FIRST_HIGH_BIT.
115 */
116 public static final int MAX_BUTTONS_SUPPORTED = 20;
117
118 /**
119 * Creates and initializes EventQueue instance for the specified
120 * AppContext.
121 * Note that event queue must be created from createNewAppContext()
122 * only in order to ensure that EventQueue constructor obtains
123 * the correct AppContext.
124 * @param appContext AppContext to associate with the event queue
125 */
126 private static void initEQ(AppContext appContext) {
127 EventQueue eventQueue = new EventQueue();
128 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
129
130 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
131 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
132 }
133
134 public SunToolkit() {
135 }
136
137 public boolean useBufferPerWindow() {
138 return false;
139 }
140
141 public abstract FramePeer createLightweightFrame(LightweightFrame target)
142 throws HeadlessException;
143
144 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
145 throws HeadlessException, AWTException;
146
147 public abstract SystemTrayPeer createSystemTray(SystemTray target);
148
149 public abstract boolean isTraySupported();
150
151 @Override
152 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
153 throws HeadlessException;
154
155 /**
156 * The AWT lock is typically only used on Unix platforms to synchronize
157 * access to Xlib, OpenGL, etc. However, these methods are implemented
158 * in SunToolkit so that they can be called from shared code (e.g.
159 * from the OGL pipeline) or from the X11 pipeline regardless of whether
160 * XToolkit or MToolkit is currently in use. There are native macros
161 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
162 * methods is changed, make sure it is compatible with the native macros.
163 *
164 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
165 * used in place of:
166 * synchronized (getAWTLock()) {
167 * ...
168 * }
169 *
170 * By factoring these methods out specially, we are able to change the
171 * implementation of these methods (e.g. use more advanced locking
172 * mechanisms) without impacting calling code.
173 *
174 * Sample usage:
175 * private void doStuffWithXlib() {
176 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
177 * SunToolkit.awtLock();
178 * try {
179 * ...
180 * XlibWrapper.XDoStuff();
181 * } finally {
182 * SunToolkit.awtUnlock();
183 * }
184 * }
185 */
186
187 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
188 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
189
190 public static final void awtLock() {
191 AWT_LOCK.lock();
192 }
193
194 public static final boolean awtTryLock() {
195 return AWT_LOCK.tryLock();
196 }
197
198 public static final void awtUnlock() {
199 AWT_LOCK.unlock();
200 }
201
202 public static final void awtLockWait()
203 throws InterruptedException
204 {
205 AWT_LOCK_COND.await();
206 }
207
208 public static final void awtLockWait(long timeout)
209 throws InterruptedException
210 {
211 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
212 }
213
214 public static final void awtLockNotify() {
215 AWT_LOCK_COND.signal();
216 }
217
218 public static final void awtLockNotifyAll() {
219 AWT_LOCK_COND.signalAll();
220 }
221
222 public static final boolean isAWTLockHeldByCurrentThread() {
223 return AWT_LOCK.isHeldByCurrentThread();
224 }
225
226 /*
227 * Create a new AppContext, along with its EventQueue, for a
228 * new ThreadGroup. Browser code, for example, would use this
229 * method to create an AppContext & EventQueue for an Applet.
230 */
231 public static AppContext createNewAppContext() {
232 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
233 return createNewAppContext(threadGroup);
234 }
235
236 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
237 // Create appContext before initialization of EventQueue, so all
238 // the calls to AppContext.getAppContext() from EventQueue ctor
239 // return correct values
240 AppContext appContext = new AppContext(threadGroup);
241 initEQ(appContext);
242
243 return appContext;
244 }
245
246 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
247 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
248 }
249
250 /*
251 * Fetch the peer associated with the given target (as specified
252 * in the peer creation method). This can be used to determine
253 * things like what the parent peer is. If the target is null
254 * or the target can't be found (either because the a peer was
255 * never created for it or the peer was disposed), a null will
256 * be returned.
257 */
258 protected static Object targetToPeer(Object target) {
259 if (target != null && !GraphicsEnvironment.isHeadless()) {
260 return AWTAutoShutdown.getInstance().getPeer(target);
261 }
262 return null;
263 }
264
265 protected static void targetCreatedPeer(Object target, Object peer) {
266 if (target != null && peer != null &&
267 !GraphicsEnvironment.isHeadless())
268 {
269 AWTAutoShutdown.getInstance().registerPeer(target, peer);
270 }
271 }
272
273 protected static void targetDisposedPeer(Object target, Object peer) {
274 if (target != null && peer != null &&
275 !GraphicsEnvironment.isHeadless())
276 {
277 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
278 }
279 }
280
281 // Maps from non-Component/MenuComponent to AppContext.
282 // WeakHashMap<Component,AppContext>
283 private static final Map<Object, AppContext> appContextMap =
284 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>());
285
286 /**
287 * Sets the appContext field of target. If target is not a Component or
288 * MenuComponent, this returns false.
289 */
290 private static boolean setAppContext(Object target,
291 AppContext context) {
292 if (target instanceof Component) {
293 AWTAccessor.getComponentAccessor().
294 setAppContext((Component)target, context);
295 } else if (target instanceof MenuComponent) {
296 AWTAccessor.getMenuComponentAccessor().
297 setAppContext((MenuComponent)target, context);
298 } else {
299 return false;
300 }
301 return true;
302 }
303
304 /**
305 * Returns the appContext field for target. If target is not a
306 * Component or MenuComponent this returns null.
307 */
308 private static AppContext getAppContext(Object target) {
309 if (target instanceof Component) {
310 return AWTAccessor.getComponentAccessor().
311 getAppContext((Component)target);
312 } else if (target instanceof MenuComponent) {
313 return AWTAccessor.getMenuComponentAccessor().
314 getAppContext((MenuComponent)target);
315 } else {
316 return null;
317 }
318 }
319
320 /*
321 * Fetch the AppContext associated with the given target.
322 * This can be used to determine things like which EventQueue
323 * to use for posting events to a Component. If the target is
324 * null or the target can't be found, a null with be returned.
325 */
326 public static AppContext targetToAppContext(Object target) {
327 if (target == null) {
328 return null;
329 }
330 AppContext context = getAppContext(target);
331 if (context == null) {
332 // target is not a Component/MenuComponent, try the
333 // appContextMap.
334 context = appContextMap.get(target);
335 }
336 return context;
337 }
338
339 /**
340 * Sets the synchronous status of focus requests on lightweight
341 * components in the specified window to the specified value.
342 * If the boolean parameter is {@code true} then the focus
343 * requests on lightweight components will be performed
344 * synchronously, if it is {@code false}, then asynchronously.
345 * By default, all windows have their lightweight request status
346 * set to asynchronous.
347 * <p>
348 * The application can only set the status of lightweight focus
349 * requests to synchronous for any of its windows if it doesn't
350 * perform focus transfers between different heavyweight containers.
351 * In this case the observable focus behaviour is the same as with
352 * asynchronous status.
353 * <p>
354 * If the application performs focus transfer between different
355 * heavyweight containers and sets the lightweight focus request
356 * status to synchronous for any of its windows, then further focus
357 * behaviour is unspecified.
358 * <p>
359 * @param changed the window for which the lightweight focus request
360 * status should be set
361 * @param status the value of lightweight focus request status
362 */
363
364 public static void setLWRequestStatus(Window changed,boolean status){
365 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
366 };
367
368 public static void checkAndSetPolicy(Container cont) {
369 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
370 getCurrentKeyboardFocusManager().
371 getDefaultFocusTraversalPolicy();
372
373 cont.setFocusTraversalPolicy(defaultPolicy);
374 }
375
376 /*
377 * Insert a mapping from target to AppContext, for later retrieval
378 * via targetToAppContext() above.
379 */
380 public static void insertTargetMapping(Object target, AppContext appContext) {
381 if (!setAppContext(target, appContext)) {
382 // Target is not a Component/MenuComponent, use the private Map
383 // instead.
384 appContextMap.put(target, appContext);
385 }
386 }
387
388 /*
389 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
390 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
391 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
392 * not be called under another lock since it locks the EventQueue.
393 * See bugids 4632918, 4526597.
394 */
395 public static void postEvent(AppContext appContext, AWTEvent event) {
396 if (event == null) {
397 throw new NullPointerException();
398 }
399
400 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
401 if (sea != null && sea.isSequencedEvent(event)) {
402 AWTEvent nested = sea.getNested(event);
403 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
404 nested instanceof TimedWindowEvent)
405 {
406 TimedWindowEvent twe = (TimedWindowEvent)nested;
407 ((SunToolkit)Toolkit.getDefaultToolkit()).
408 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
409 }
410 }
411
412 // All events posted via this method are system-generated.
413 // Placing the following call here reduces considerably the
414 // number of places throughout the toolkit that would
415 // otherwise have to be modified to precisely identify
416 // system-generated events.
417 setSystemGenerated(event);
418 AppContext eventContext = targetToAppContext(event.getSource());
419 if (eventContext != null && !eventContext.equals(appContext)) {
420 throw new RuntimeException("Event posted on wrong app context : " + event);
421 }
422 PostEventQueue postEventQueue =
423 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
424 if (postEventQueue != null) {
425 postEventQueue.postEvent(event);
426 }
427 }
428
429 /*
430 * Post AWTEvent of high priority.
431 */
432 public static void postPriorityEvent(final AWTEvent e) {
433 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
434 @Override
435 public void run() {
436 AWTAccessor.getAWTEventAccessor().setPosted(e);
437 ((Component)e.getSource()).dispatchEvent(e);
438 }
439 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
440 postEvent(targetToAppContext(e.getSource()), pe);
441 }
442
443 /*
444 * Flush any pending events which haven't been posted to the AWT
445 * EventQueue yet.
446 */
447 public static void flushPendingEvents() {
448 AppContext appContext = AppContext.getAppContext();
449 flushPendingEvents(appContext);
450 }
451
452 /*
453 * Flush the PostEventQueue for the right AppContext.
454 * The default flushPendingEvents only flushes the thread-local context,
455 * which is not always correct, c.f. 3746956
456 */
457 public static void flushPendingEvents(AppContext appContext) {
458 PostEventQueue postEventQueue =
459 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
460 if (postEventQueue != null) {
461 postEventQueue.flush();
462 }
463 }
464
465 /*
466 * Execute a chunk of code on the Java event handler thread for the
467 * given target. Does not wait for the execution to occur before
468 * returning to the caller.
469 */
470 public static void executeOnEventHandlerThread(Object target,
471 Runnable runnable) {
472 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
473 }
474
475 /*
476 * Fixed 5064013: the InvocationEvent time should be equals
477 * the time of the ActionEvent
478 */
479 @SuppressWarnings("serial")
480 public static void executeOnEventHandlerThread(Object target,
481 Runnable runnable,
482 final long when) {
483 executeOnEventHandlerThread(
484 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
485 @Override
486 public long getWhen() {
487 return when;
488 }
489 });
490 }
491
492 /*
493 * Execute a chunk of code on the Java event handler thread for the
494 * given target. Does not wait for the execution to occur before
495 * returning to the caller.
496 */
497 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
498 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
499 }
500
501 /*
502 * Execute a chunk of code on the Java event handler thread. The
503 * method takes into account provided AppContext and sets
504 * {@code SunToolkit.getDefaultToolkit()} as a target of the
505 * event. See 6451487 for detailes.
506 * Does not wait for the execution to occur before returning to
507 * the caller.
508 */
509 public static void invokeLaterOnAppContext(
510 AppContext appContext, Runnable dispatcher)
511 {
512 postEvent(appContext,
513 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
514 PeerEvent.PRIORITY_EVENT));
515 }
516
517 /*
518 * Execute a chunk of code on the Java event handler thread for the
519 * given target. Waits for the execution to occur before returning
520 * to the caller.
521 */
522 public static void executeOnEDTAndWait(Object target, Runnable runnable)
523 throws InterruptedException, InvocationTargetException
524 {
525 if (EventQueue.isDispatchThread()) {
526 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
527 }
528
529 class AWTInvocationLock {}
530 Object lock = new AWTInvocationLock();
531
532 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
533
534 synchronized (lock) {
535 executeOnEventHandlerThread(event);
536 while(!event.isDispatched()) {
537 lock.wait();
538 }
539 }
540
541 Throwable eventThrowable = event.getThrowable();
542 if (eventThrowable != null) {
543 throw new InvocationTargetException(eventThrowable);
544 }
545 }
546
547 /*
548 * Returns true if the calling thread is the event dispatch thread
549 * contained within AppContext which associated with the given target.
550 * Use this call to ensure that a given task is being executed
551 * (or not being) on the event dispatch thread for the given target.
552 */
553 public static boolean isDispatchThreadForAppContext(Object target) {
554 AppContext appContext = targetToAppContext(target);
555 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
556
557 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
558 return accessor.isDispatchThreadImpl(eq);
559 }
560
561 @Override
562 public Dimension getScreenSize() {
563 return new Dimension(getScreenWidth(), getScreenHeight());
564 }
565 protected abstract int getScreenWidth();
566 protected abstract int getScreenHeight();
567
568 @Override
569 @SuppressWarnings("deprecation")
570 public FontMetrics getFontMetrics(Font font) {
571 return FontDesignMetrics.getMetrics(font);
572 }
573
574 @Override
575 @SuppressWarnings("deprecation")
576 public String[] getFontList() {
577 String[] hardwiredFontList = {
578 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
579 Font.DIALOG_INPUT
580
581 // -- Obsolete font names from 1.0.2. It was decided that
582 // -- getFontList should not return these old names:
583 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
584 };
585 return hardwiredFontList;
586 }
587
588 /**
589 * Disables erasing of background on the canvas before painting if
590 * this is supported by the current toolkit. It is recommended to
591 * call this method early, before the Canvas becomes displayable,
592 * because some Toolkit implementations do not support changing
593 * this property once the Canvas becomes displayable.
594 */
595 public void disableBackgroundErase(Canvas canvas) {
596 disableBackgroundEraseImpl(canvas);
597 }
598
599 /**
600 * Disables the native erasing of the background on the given
601 * component before painting if this is supported by the current
602 * toolkit. This only has an effect for certain components such as
603 * Canvas, Panel and Window. It is recommended to call this method
604 * early, before the Component becomes displayable, because some
605 * Toolkit implementations do not support changing this property
606 * once the Component becomes displayable.
607 */
608 public void disableBackgroundErase(Component component) {
609 disableBackgroundEraseImpl(component);
610 }
611
612 private void disableBackgroundEraseImpl(Component component) {
613 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
614 }
615
616 /**
617 * Returns the value of "sun.awt.noerasebackground" property. Default
618 * value is {@code false}.
619 */
620 public static boolean getSunAwtNoerasebackground() {
621 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
622 }
623
624 /**
625 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
626 * value is {@code false}.
627 */
628 public static boolean getSunAwtErasebackgroundonresize() {
629 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
630 }
631
632
633 @SuppressWarnings("deprecation")
634 static final SoftCache fileImgCache = new SoftCache();
635
636 @SuppressWarnings("deprecation")
637 static final SoftCache urlImgCache = new SoftCache();
638
639 static Image getImageFromHash(Toolkit tk, URL url) {
640 checkPermissions(url);
641 synchronized (urlImgCache) {
642 String key = url.toString();
643 Image img = (Image)urlImgCache.get(key);
644 if (img == null) {
645 try {
646 img = tk.createImage(new URLImageSource(url));
647 urlImgCache.put(key, img);
648 } catch (Exception e) {
649 }
650 }
651 return img;
652 }
653 }
654
655 static Image getImageFromHash(Toolkit tk,
656 String filename) {
657 checkPermissions(filename);
658 synchronized (fileImgCache) {
659 Image img = (Image)fileImgCache.get(filename);
660 if (img == null) {
661 try {
662 img = tk.createImage(new FileImageSource(filename));
663 fileImgCache.put(filename, img);
664 } catch (Exception e) {
665 }
666 }
667 return img;
668 }
669 }
670
671 @Override
672 public Image getImage(String filename) {
673 return getImageFromHash(this, filename);
674 }
675
676 @Override
677 public Image getImage(URL url) {
678 return getImageFromHash(this, url);
679 }
680
681 protected Image getImageWithResolutionVariant(String fileName,
682 String resolutionVariantName) {
683 synchronized (fileImgCache) {
684 Image image = getImageFromHash(this, fileName);
685 if (image instanceof MultiResolutionImage) {
686 return image;
687 }
688 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
689 image = createImageWithResolutionVariant(image, resolutionVariant);
690 fileImgCache.put(fileName, image);
691 return image;
692 }
693 }
694
695 protected Image getImageWithResolutionVariant(URL url,
696 URL resolutionVariantURL) {
697 synchronized (urlImgCache) {
698 Image image = getImageFromHash(this, url);
699 if (image instanceof MultiResolutionImage) {
700 return image;
701 }
702 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
703 image = createImageWithResolutionVariant(image, resolutionVariant);
704 String key = url.toString();
705 urlImgCache.put(key, image);
706 return image;
707 }
708 }
709
710
711 @Override
712 public Image createImage(String filename) {
713 checkPermissions(filename);
714 return createImage(new FileImageSource(filename));
715 }
716
717 @Override
718 public Image createImage(URL url) {
719 checkPermissions(url);
720 return createImage(new URLImageSource(url));
721 }
722
723 @Override
724 public Image createImage(byte[] data, int offset, int length) {
725 return createImage(new ByteArrayImageSource(data, offset, length));
726 }
727
728 @Override
729 public Image createImage(ImageProducer producer) {
730 return new ToolkitImage(producer);
731 }
732
733 public static Image createImageWithResolutionVariant(Image image,
734 Image resolutionVariant) {
735 return new MultiResolutionToolkitImage(image, resolutionVariant);
736 }
737
738 @Override
739 public int checkImage(Image img, int w, int h, ImageObserver o) {
740 if (!(img instanceof ToolkitImage)) {
741 return ImageObserver.ALLBITS;
742 }
743
744 ToolkitImage tkimg = (ToolkitImage)img;
745 int repbits;
746 if (w == 0 || h == 0) {
747 repbits = ImageObserver.ALLBITS;
748 } else {
749 repbits = tkimg.getImageRep().check(o);
750 }
751 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
752 }
753
754 @Override
755 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
756 if (w == 0 || h == 0) {
757 return true;
758 }
759
760 // Must be a ToolkitImage
761 if (!(img instanceof ToolkitImage)) {
762 return true;
763 }
764
765 ToolkitImage tkimg = (ToolkitImage)img;
766 if (tkimg.hasError()) {
767 if (o != null) {
768 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
769 -1, -1, -1, -1);
770 }
771 return false;
772 }
773 ImageRepresentation ir = tkimg.getImageRep();
774 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
775 }
776
777 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
778 ToolkitImage rvImage = getResolutionVariant(img);
779 int rvw = getRVSize(w);
780 int rvh = getRVSize(h);
781 // Ignore the resolution variant in case of error
782 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
783 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
784 getResolutionVariantObserver(
785 img, o, w, h, rvw, rvh, true));
786 }
787
788 private boolean prepareResolutionVariant(Image img, int w, int h,
789 ImageObserver o) {
790
791 ToolkitImage rvImage = getResolutionVariant(img);
792 int rvw = getRVSize(w);
793 int rvh = getRVSize(h);
794 // Ignore the resolution variant in case of error
795 return rvImage == null || rvImage.hasError() || prepareImage(
796 rvImage, rvw, rvh,
797 MultiResolutionToolkitImage.getResolutionVariantObserver(
798 img, o, w, h, rvw, rvh, true));
799 }
800
801 private static int getRVSize(int size){
802 return size == -1 ? -1 : 2 * size;
803 }
804
805 private static ToolkitImage getResolutionVariant(Image image) {
806 if (image instanceof MultiResolutionToolkitImage) {
807 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
808 getResolutionVariant();
809 if (resolutionVariant instanceof ToolkitImage) {
810 return (ToolkitImage) resolutionVariant;
811 }
812 }
813 return null;
814 }
815
816 protected static boolean imageCached(String fileName) {
817 return fileImgCache.containsKey(fileName);
818 }
819
820 protected static boolean imageCached(URL url) {
821 String key = url.toString();
822 return urlImgCache.containsKey(key);
823 }
824
825 protected static boolean imageExists(String filename) {
826 if (filename != null) {
827 checkPermissions(filename);
828 return new File(filename).exists();
829 }
830 return false;
831 }
832
833 @SuppressWarnings("try")
834 protected static boolean imageExists(URL url) {
835 if (url != null) {
836 checkPermissions(url);
837 try (InputStream is = url.openStream()) {
838 return true;
839 }catch(IOException e){
840 return false;
841 }
842 }
843 return false;
844 }
845
846 private static void checkPermissions(String filename) {
847 SecurityManager security = System.getSecurityManager();
848 if (security != null) {
849 security.checkRead(filename);
850 }
851 }
852
853 private static void checkPermissions(URL url) {
854 SecurityManager sm = System.getSecurityManager();
855 if (sm != null) {
856 try {
857 java.security.Permission perm =
858 URLUtil.getConnectPermission(url);
859 if (perm != null) {
860 try {
861 sm.checkPermission(perm);
862 } catch (SecurityException se) {
863 // fallback to checkRead/checkConnect for pre 1.2
864 // security managers
865 if ((perm instanceof java.io.FilePermission) &&
866 perm.getActions().indexOf("read") != -1) {
867 sm.checkRead(perm.getName());
868 } else if ((perm instanceof
869 java.net.SocketPermission) &&
870 perm.getActions().indexOf("connect") != -1) {
871 sm.checkConnect(url.getHost(), url.getPort());
872 } else {
873 throw se;
874 }
875 }
876 }
877 } catch (java.io.IOException ioe) {
878 sm.checkConnect(url.getHost(), url.getPort());
879 }
880 }
881 }
882
883 /**
884 * Scans {@code imageList} for best-looking image of specified dimensions.
885 * Image can be scaled and/or padded with transparency.
886 */
887 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
888 if (width == 0 || height == 0) {
889 return null;
890 }
891 java.util.List<Image> multiResAndnormalImages = new ArrayList<>(imageList.size());
892 for (Image image : imageList) {
893 if ((image instanceof MultiResolutionImage)) {
894 Image im = ((MultiResolutionImage) image).getResolutionVariant(width, height);
895 multiResAndnormalImages.add(im);
896 } else {
897 multiResAndnormalImages.add(image);
898 }
899 }
900 Image bestImage = null;
901 int bestWidth = 0;
902 int bestHeight = 0;
903 double bestSimilarity = 3; //Impossibly high value
904 double bestScaleFactor = 0;
905 for (Iterator<Image> i = multiResAndnormalImages.iterator();i.hasNext();) {
906 //Iterate imageList looking for best matching image.
907 //'Similarity' measure is defined as good scale factor and small insets.
908 //best possible similarity is 0 (no scale, no insets).
909 //It's found while the experiments that good-looking result is achieved
910 //with scale factors x1, x3/4, x2/3, xN, x1/N.
911 Image im = i.next();
912 if (im == null) {
913 continue;
914 }
915 if (im instanceof ToolkitImage) {
916 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
917 ir.reconstruct(ImageObserver.ALLBITS);
918 }
919 int iw;
920 int ih;
921 try {
922 iw = im.getWidth(null);
923 ih = im.getHeight(null);
924 } catch (Exception e){
925 continue;
926 }
927 if (iw > 0 && ih > 0) {
928 //Calc scale factor
929 double scaleFactor = Math.min((double)width / (double)iw,
930 (double)height / (double)ih);
931 //Calculate scaled image dimensions
932 //adjusting scale factor to nearest "good" value
933 int adjw = 0;
934 int adjh = 0;
935 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
936 if (scaleFactor >= 2) {
937 //Need to enlarge image more than twice
938 //Round down scale factor to multiply by integer value
939 scaleFactor = Math.floor(scaleFactor);
940 adjw = iw * (int)scaleFactor;
941 adjh = ih * (int)scaleFactor;
942 scaleMeasure = 1.0 - 0.5 / scaleFactor;
943 } else if (scaleFactor >= 1) {
944 //Don't scale
945 scaleFactor = 1.0;
946 adjw = iw;
947 adjh = ih;
948 scaleMeasure = 0;
949 } else if (scaleFactor >= 0.75) {
950 //Multiply by 3/4
951 scaleFactor = 0.75;
952 adjw = iw * 3 / 4;
953 adjh = ih * 3 / 4;
954 scaleMeasure = 0.3;
955 } else if (scaleFactor >= 0.6666) {
956 //Multiply by 2/3
957 scaleFactor = 0.6666;
958 adjw = iw * 2 / 3;
959 adjh = ih * 2 / 3;
960 scaleMeasure = 0.33;
961 } else {
962 //Multiply size by 1/scaleDivider
963 //where scaleDivider is minimum possible integer
964 //larger than 1/scaleFactor
965 double scaleDivider = Math.ceil(1.0 / scaleFactor);
966 scaleFactor = 1.0 / scaleDivider;
967 adjw = (int)Math.round((double)iw / scaleDivider);
968 adjh = (int)Math.round((double)ih / scaleDivider);
969 scaleMeasure = 1.0 - 1.0 / scaleDivider;
970 }
971 double similarity = ((double)width - (double)adjw) / (double)width +
972 ((double)height - (double)adjh) / (double)height + //Large padding is bad
973 scaleMeasure; //Large rescale is bad
974 if (similarity < bestSimilarity) {
975 bestSimilarity = similarity;
976 bestScaleFactor = scaleFactor;
977 bestImage = im;
978 bestWidth = adjw;
979 bestHeight = adjh;
980 }
981 if (similarity == 0) break;
982 }
983 }
984 if (bestImage == null) {
985 //No images were found, possibly all are broken
986 return null;
987 }
988 BufferedImage bimage =
989 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
990 Graphics2D g = bimage.createGraphics();
991 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
992 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
993 try {
994 int x = (width - bestWidth) / 2;
995 int y = (height - bestHeight) / 2;
996 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
997 } finally {
998 g.dispose();
999 }
1000 return bimage;
1001 }
1002
1003 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1004 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1005 if (bimage == null) {
1006 return null;
1007 }
1008 Raster raster = bimage.getRaster();
1009 DataBuffer buffer = raster.getDataBuffer();
1010 return (DataBufferInt)buffer;
1011 }
1012
1013 @Override
1014 protected EventQueue getSystemEventQueueImpl() {
1015 return getSystemEventQueueImplPP();
1016 }
1017
1018 // Package private implementation
1019 static EventQueue getSystemEventQueueImplPP() {
1020 return getSystemEventQueueImplPP(AppContext.getAppContext());
1021 }
1022
1023 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1024 EventQueue theEventQueue =
1025 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1026 return theEventQueue;
1027 }
1028
1029 /**
1030 * Give native peers the ability to query the native container
1031 * given a native component (eg the direct parent may be lightweight).
1032 */
1033 public static Container getNativeContainer(Component c) {
1034 return Toolkit.getNativeContainer(c);
1035 }
1036
1037 /**
1038 * Gives native peers the ability to query the closest HW component.
1039 * If the given component is heavyweight, then it returns this. Otherwise,
1040 * it goes one level up in the hierarchy and tests next component.
1041 */
1042 public static Component getHeavyweightComponent(Component c) {
1043 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1044 c = AWTAccessor.getComponentAccessor().getParent(c);
1045 }
1046 return c;
1047 }
1048
1049 /**
1050 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1051 */
1052 @SuppressWarnings("deprecation")
1053 public int getFocusAcceleratorKeyMask() {
1054 return InputEvent.ALT_MASK;
1055 }
1056
1057 /**
1058 * Tests whether specified key modifiers mask can be used to enter a printable
1059 * character. This is a default implementation of this method, which reflects
1060 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1061 * characters from the extended character set (like euro sign or math symbols)
1062 */
1063 @SuppressWarnings("deprecation")
1064 public boolean isPrintableCharacterModifiersMask(int mods) {
1065 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1066 }
1067
1068 /**
1069 * Returns whether popup is allowed to be shown above the task bar.
1070 * This is a default implementation of this method, which checks
1071 * corresponding security permission.
1072 */
1073 public boolean canPopupOverlapTaskBar() {
1074 boolean result = true;
1075 try {
1076 SecurityManager sm = System.getSecurityManager();
1077 if (sm != null) {
1078 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1079 }
1080 } catch (SecurityException se) {
1081 // There is no permission to show popups over the task bar
1082 result = false;
1083 }
1084 return result;
1085 }
1086
1087 /**
1088 * Returns a new input method window, with behavior as specified in
1089 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1090 * If the inputContext is not null, the window should return it from its
1091 * getInputContext() method. The window needs to implement
1092 * sun.awt.im.InputMethodWindow.
1093 * <p>
1094 * SunToolkit subclasses can override this method to return better input
1095 * method windows.
1096 */
1097 @Override
1098 public Window createInputMethodWindow(String title, InputContext context) {
1099 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1100 }
1101
1102 /**
1103 * Returns whether enableInputMethods should be set to true for peered
1104 * TextComponent instances on this platform. False by default.
1105 */
1106 @Override
1107 public boolean enableInputMethodsForTextComponent() {
1108 return false;
1109 }
1110
1111 private static Locale startupLocale = null;
1112
1113 /**
1114 * Returns the locale in which the runtime was started.
1115 */
1116 public static Locale getStartupLocale() {
1117 if (startupLocale == null) {
1118 String language, region, country, variant;
1119 language = AccessController.doPrivileged(
1120 new GetPropertyAction("user.language", "en"));
1121 // for compatibility, check for old user.region property
1122 region = AccessController.doPrivileged(
1123 new GetPropertyAction("user.region"));
1124 if (region != null) {
1125 // region can be of form country, country_variant, or _variant
1126 int i = region.indexOf('_');
1127 if (i >= 0) {
1128 country = region.substring(0, i);
1129 variant = region.substring(i + 1);
1130 } else {
1131 country = region;
1132 variant = "";
1133 }
1134 } else {
1135 country = AccessController.doPrivileged(
1136 new GetPropertyAction("user.country", ""));
1137 variant = AccessController.doPrivileged(
1138 new GetPropertyAction("user.variant", ""));
1139 }
1140 startupLocale = new Locale(language, country, variant);
1141 }
1142 return startupLocale;
1143 }
1144
1145 /**
1146 * Returns the default keyboard locale of the underlying operating system
1147 */
1148 @Override
1149 public Locale getDefaultKeyboardLocale() {
1150 return getStartupLocale();
1151 }
1152
1153 /**
1154 * Returns whether default toolkit needs the support of the xembed
1155 * from embedding host(if any).
1156 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1157 */
1158 public static boolean needsXEmbed() {
1159 String noxembed = AccessController.
1160 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1161 if ("true".equals(noxembed)) {
1162 return false;
1163 }
1164
1165 Toolkit tk = Toolkit.getDefaultToolkit();
1166 if (tk instanceof SunToolkit) {
1167 // SunToolkit descendants should override this method to specify
1168 // concrete behavior
1169 return ((SunToolkit)tk).needsXEmbedImpl();
1170 } else {
1171 // Non-SunToolkit doubtly might support XEmbed
1172 return false;
1173 }
1174 }
1175
1176 /**
1177 * Returns whether this toolkit needs the support of the xembed
1178 * from embedding host(if any).
1179 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1180 */
1181 protected boolean needsXEmbedImpl() {
1182 return false;
1183 }
1184
1185 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1186
1187 /**
1188 * Returns whether the XEmbed server feature is requested by
1189 * developer. If true, Toolkit should return an
1190 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1191 */
1192 protected final boolean isXEmbedServerRequested() {
1193 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1194 }
1195
1196 /**
1197 * Returns whether the modal exclusion API is supported by the current toolkit.
1198 * When it isn't supported, calling {@code setModalExcluded} has no
1199 * effect, and {@code isModalExcluded} returns false for all windows.
1200 *
1201 * @return true if modal exclusion is supported by the toolkit, false otherwise
1202 *
1203 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1204 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1205 *
1206 * @since 1.5
1207 */
1208 public static boolean isModalExcludedSupported()
1209 {
1210 Toolkit tk = Toolkit.getDefaultToolkit();
1211 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1212 }
1213 /*
1214 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1215 *
1216 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1217 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1218 *
1219 * @since 1.5
1220 */
1221 protected boolean isModalExcludedSupportedImpl()
1222 {
1223 return false;
1224 }
1225
1226 /*
1227 * Sets this window to be excluded from being modally blocked. When the
1228 * toolkit supports modal exclusion and this method is called, input
1229 * events, focus transfer and z-order will continue to work for the
1230 * window, it's owned windows and child components, even in the
1231 * presence of a modal dialog.
1232 * For details on which {@code Window}s are normally blocked
1233 * by modal dialog, see {@link java.awt.Dialog}.
1234 * Invoking this method when the modal exclusion API is not supported by
1235 * the current toolkit has no effect.
1236 * @param window Window to be marked as not modally blocked
1237 * @see java.awt.Dialog
1238 * @see java.awt.Dialog#setModal(boolean)
1239 * @see sun.awt.SunToolkit#isModalExcludedSupported
1240 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1241 */
1242 public static void setModalExcluded(Window window)
1243 {
1244 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1245 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1246 }
1247 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1248 }
1249
1250 /*
1251 * Returns whether the specified window is blocked by modal dialogs.
1252 * If the modal exclusion API isn't supported by the current toolkit,
1253 * it returns false for all windows.
1254 *
1255 * @param window Window to test for modal exclusion
1256 *
1257 * @return true if the window is modal excluded, false otherwise. If
1258 * the modal exclusion isn't supported by the current Toolkit, false
1259 * is returned
1260 *
1261 * @see sun.awt.SunToolkit#isModalExcludedSupported
1262 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1263 *
1264 * @since 1.5
1265 */
1266 public static boolean isModalExcluded(Window window)
1267 {
1268 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1269 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1270 }
1271 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1272 }
1273
1274 /**
1275 * Overridden in XToolkit and WToolkit
1276 */
1277 @Override
1278 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1279 return (modalityType == Dialog.ModalityType.MODELESS) ||
1280 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1281 }
1282
1283 /**
1284 * Overridden in XToolkit and WToolkit
1285 */
1286 @Override
1287 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1288 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1289 }
1290
1291 ///////////////////////////////////////////////////////////////////////////
1292 //
1293 // The following is used by the Java Plug-in to coordinate dialog modality
1294 // between containing applications (browsers, ActiveX containers etc) and
1295 // the AWT.
1296 //
1297 ///////////////////////////////////////////////////////////////////////////
1298
1299 private ModalityListenerList modalityListeners = new ModalityListenerList();
1300
1301 public void addModalityListener(ModalityListener listener) {
1302 modalityListeners.add(listener);
1303 }
1304
1305 public void removeModalityListener(ModalityListener listener) {
1306 modalityListeners.remove(listener);
1307 }
1308
1309 public void notifyModalityPushed(Dialog dialog) {
1310 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1311 }
1312
1313 public void notifyModalityPopped(Dialog dialog) {
1314 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1315 }
1316
1317 final void notifyModalityChange(int id, Dialog source) {
1318 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1319 ev.dispatch();
1320 }
1321
1322 static class ModalityListenerList implements ModalityListener {
1323
1324 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1325
1326 void add(ModalityListener listener) {
1327 listeners.addElement(listener);
1328 }
1329
1330 void remove(ModalityListener listener) {
1331 listeners.removeElement(listener);
1332 }
1333
1334 @Override
1335 public void modalityPushed(ModalityEvent ev) {
1336 Iterator<ModalityListener> it = listeners.iterator();
1337 while (it.hasNext()) {
1338 it.next().modalityPushed(ev);
1339 }
1340 }
1341
1342 @Override
1343 public void modalityPopped(ModalityEvent ev) {
1344 Iterator<ModalityListener> it = listeners.iterator();
1345 while (it.hasNext()) {
1346 it.next().modalityPopped(ev);
1347 }
1348 }
1349 } // end of class ModalityListenerList
1350
1351 ///////////////////////////////////////////////////////////////////////////
1352 // End Plug-in code
1353 ///////////////////////////////////////////////////////////////////////////
1354
1355 public static boolean isLightweightOrUnknown(Component comp) {
1356 if (comp.isLightweight()
1357 || !(getDefaultToolkit() instanceof SunToolkit))
1358 {
1359 return true;
1360 }
1361 return !(comp instanceof Button
1362 || comp instanceof Canvas
1363 || comp instanceof Checkbox
1364 || comp instanceof Choice
1365 || comp instanceof Label
1366 || comp instanceof java.awt.List
1367 || comp instanceof Panel
1368 || comp instanceof Scrollbar
1369 || comp instanceof ScrollPane
1370 || comp instanceof TextArea
1371 || comp instanceof TextField
1372 || comp instanceof Window);
1373 }
1374
1375 @SuppressWarnings("serial")
1376 public static class OperationTimedOut extends RuntimeException {
1377 public OperationTimedOut(String msg) {
1378 super(msg);
1379 }
1380 public OperationTimedOut() {
1381 }
1382 }
1383
1384 @SuppressWarnings("serial")
1385 public static class InfiniteLoop extends RuntimeException {
1386 }
1387
1388 @SuppressWarnings("serial")
1389 public static class IllegalThreadException extends RuntimeException {
1390 public IllegalThreadException(String msg) {
1391 super(msg);
1392 }
1393 public IllegalThreadException() {
1394 }
1395 }
1396
1397 public static final int DEFAULT_WAIT_TIME = 10000;
1398 private static final int MAX_ITERS = 20;
1399 private static final int MIN_ITERS = 0;
1400 private static final int MINIMAL_EDELAY = 0;
1401
1402 /**
1403 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1404 */
1405 public void realSync() throws OperationTimedOut, InfiniteLoop {
1406 realSync(DEFAULT_WAIT_TIME);
1407 }
1408
1409 /**
1410 * Forces toolkit to synchronize with the native windowing
1411 * sub-system, flushing all pending work and waiting for all the
1412 * events to be processed. This method guarantees that after
1413 * return no additional Java events will be generated, unless
1414 * cause by user. Obviously, the method cannot be used on the
1415 * event dispatch thread (EDT). In case it nevertheless gets
1416 * invoked on this thread, the method throws the
1417 * IllegalThreadException runtime exception.
1418 *
1419 * <p> This method allows to write tests without explicit timeouts
1420 * or wait for some event. Example:
1421 * <pre>{@code
1422 * Frame f = ...;
1423 * f.setVisible(true);
1424 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1425 * }</pre>
1426 *
1427 * <p> After realSync, {@code f} will be completely visible
1428 * on the screen, its getLocationOnScreen will be returning the
1429 * right result and it will be the focus owner.
1430 *
1431 * <p> Another example:
1432 * <pre>{@code
1433 * b.requestFocus();
1434 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1435 * }</pre>
1436 *
1437 * <p> After realSync, {@code b} will be focus owner.
1438 *
1439 * <p> Notice that realSync isn't guaranteed to work if recurring
1440 * actions occur, such as if during processing of some event
1441 * another request which may generate some events occurs. By
1442 * default, sync tries to perform as much as {@value #MAX_ITERS}
1443 * cycles of event processing, allowing for roughly {@value
1444 * #MAX_ITERS} additional requests.
1445 *
1446 * <p> For example, requestFocus() generates native request, which
1447 * generates one or two Java focus events, which then generate a
1448 * serie of paint events, a serie of Java focus events, which then
1449 * generate a serie of paint events which then are processed -
1450 * three cycles, minimum.
1451 *
1452 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1453 */
1454 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1455 {
1456 if (EventQueue.isDispatchThread()) {
1457 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1458 }
1459 int bigLoop = 0;
1460 do {
1461 // Let's do sync first
1462 sync();
1463
1464 // During the wait process, when we were processing incoming
1465 // events, we could have made some new request, which can
1466 // generate new events. Example: MapNotify/XSetInputFocus.
1467 // Therefore, we dispatch them as long as there is something
1468 // to dispatch.
1469 int iters = 0;
1470 while (iters < MIN_ITERS) {
1471 syncNativeQueue(timeout);
1472 iters++;
1473 }
1474 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1475 iters++;
1476 }
1477 if (iters >= MAX_ITERS) {
1478 throw new InfiniteLoop();
1479 }
1480
1481 // native requests were dispatched by X/Window Manager or Windows
1482 // Moreover, we processed them all on Toolkit thread
1483 // Now wait while EDT processes them.
1484 //
1485 // During processing of some events (focus, for example),
1486 // some other events could have been generated. So, after
1487 // waitForIdle, we may end up with full EventQueue
1488 iters = 0;
1489 while (iters < MIN_ITERS) {
1490 waitForIdle(timeout);
1491 iters++;
1492 }
1493 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1494 iters++;
1495 }
1496 if (iters >= MAX_ITERS) {
1497 throw new InfiniteLoop();
1498 }
1499
1500 bigLoop++;
1501 // Again, for Java events, it was simple to check for new Java
1502 // events by checking event queue, but what if Java events
1503 // resulted in native requests? Therefor, check native events again.
1504 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1505 }
1506
1507 /**
1508 * Platform toolkits need to implement this method to perform the
1509 * sync of the native queue. The method should wait until native
1510 * requests are processed, all native events are processed and
1511 * corresponding Java events are generated. Should return
1512 * {@code true} if some events were processed,
1513 * {@code false} otherwise.
1514 */
1515 protected abstract boolean syncNativeQueue(final long timeout);
1516
1517 private boolean eventDispatched;
1518 private boolean queueEmpty;
1519 private final Object waitLock = new Object();
1520
1521 private boolean isEQEmpty() {
1522 EventQueue queue = getSystemEventQueueImpl();
1523 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1524 }
1525
1526 /**
1527 * Waits for the Java event queue to empty. Ensures that all
1528 * events are processed (including paint events), and that if
1529 * recursive events were generated, they are also processed.
1530 * Should return {@code true} if more processing is
1531 * necessary, {@code false} otherwise.
1532 */
1533 @SuppressWarnings("serial")
1534 protected final boolean waitForIdle(final long timeout) {
1535 flushPendingEvents();
1536 final boolean queueWasEmpty;
1537 synchronized (waitLock) {
1538 queueWasEmpty = isEQEmpty();
1539 queueEmpty = false;
1540 eventDispatched = false;
1541 postEvent(AppContext.getAppContext(),
1542 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1543 @Override
1544 public void dispatch() {
1545 // Here we block EDT. It could have some
1546 // events, it should have dispatched them by
1547 // now. So native requests could have been
1548 // generated. First, dispatch them. Then,
1549 // flush Java events again.
1550 int iters = 0;
1551 while (iters < MIN_ITERS) {
1552 syncNativeQueue(timeout);
1553 iters++;
1554 }
1555 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1556 iters++;
1557 }
1558 flushPendingEvents();
1559
1560 synchronized(waitLock) {
1561 queueEmpty = isEQEmpty();
1562 eventDispatched = true;
1563 waitLock.notifyAll();
1564 }
1565 }
1566 });
1567 try {
1568 while (!eventDispatched) {
1569 waitLock.wait();
1570 }
1571 } catch (InterruptedException ie) {
1572 return false;
1573 }
1574 }
1575
1576 try {
1577 Thread.sleep(MINIMAL_EDELAY);
1578 } catch (InterruptedException ie) {
1579 throw new RuntimeException("Interrupted");
1580 }
1581
1582 flushPendingEvents();
1583
1584 // Lock to force write-cache flush for queueEmpty.
1585 synchronized (waitLock) {
1586 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1587 }
1588 }
1589
1590 /**
1591 * Grabs the mouse input for the given window. The window must be
1592 * visible. The window or its children do not receive any
1593 * additional mouse events besides those targeted to them. All
1594 * other events will be dispatched as before - to the respective
1595 * targets. This Window will receive UngrabEvent when automatic
1596 * ungrab is about to happen. The event can be listened to by
1597 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1598 * UngrabEvent class for the list of conditions when ungrab is
1599 * about to happen.
1600 * @see UngrabEvent
1601 */
1602 public abstract void grab(Window w);
1603
1604 /**
1605 * Forces ungrab. No event will be sent.
1606 */
1607 public abstract void ungrab(Window w);
1608
1609
1610 /**
1611 * Locates the splash screen library in a platform dependent way and closes
1612 * the splash screen. Should be invoked on first top-level frame display.
1613 * @see java.awt.SplashScreen
1614 * @since 1.6
1615 */
1616 public static native void closeSplashScreen();
1617
1618 /* The following methods and variables are to support retrieving
1619 * desktop text anti-aliasing settings
1620 */
1621
1622 /* Need an instance method because setDesktopProperty(..) is protected. */
1623 private void fireDesktopFontPropertyChanges() {
1624 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1625 SunToolkit.getDesktopFontHints());
1626 }
1627
1628 private static boolean checkedSystemAAFontSettings;
1629 private static boolean useSystemAAFontSettings;
1630 private static boolean lastExtraCondition = true;
1631 private static RenderingHints desktopFontHints;
1632
1633 /* Since Swing is the reason for this "extra condition" logic its
1634 * worth documenting it in some detail.
1635 * First, a goal is for Swing and applications to both retrieve and
1636 * use the same desktop property value so that there is complete
1637 * consistency between the settings used by JDK's Swing implementation
1638 * and 3rd party custom Swing components, custom L&Fs and any general
1639 * text rendering that wants to be consistent with these.
1640 * But by default on Solaris & Linux Swing will not use AA text over
1641 * remote X11 display (unless Xrender can be used which is TBD and may not
1642 * always be available anyway) as that is a noticeable performance hit.
1643 * So there needs to be a way to express that extra condition so that
1644 * it is seen by all clients of the desktop property API.
1645 * If this were the only condition it could be handled here as it would
1646 * be the same for any L&F and could reasonably be considered to be
1647 * a static behaviour of those systems.
1648 * But GTK currently has an additional test based on locale which is
1649 * not applied by Metal. So mixing GTK in a few locales with Metal
1650 * would mean the last one wins.
1651 * This could be stored per-app context which would work
1652 * for different applets, but wouldn't help for a single application
1653 * using GTK and some other L&F concurrently.
1654 * But it is expected this will be addressed within GTK and the font
1655 * system so is a temporary and somewhat unlikely harmless corner case.
1656 */
1657 public static void setAAFontSettingsCondition(boolean extraCondition) {
1658 if (extraCondition != lastExtraCondition) {
1659 lastExtraCondition = extraCondition;
1660 if (checkedSystemAAFontSettings) {
1661 /* Someone already asked for this info, under a different
1662 * condition.
1663 * We'll force re-evaluation instead of replicating the
1664 * logic, then notify any listeners of any change.
1665 */
1666 checkedSystemAAFontSettings = false;
1667 Toolkit tk = Toolkit.getDefaultToolkit();
1668 if (tk instanceof SunToolkit) {
1669 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1670 }
1671 }
1672 }
1673 }
1674
1675 /* "false", "off", ""default" aren't explicitly tested, they
1676 * just fall through to produce a null return which all are equated to
1677 * "false".
1678 */
1679 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1680 Object aaHint = null;
1681 hintname = hintname.toLowerCase(Locale.ENGLISH);
1682 if (hintname.equals("on")) {
1683 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1684 } else if (hintname.equals("gasp")) {
1685 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1686 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1687 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1688 } else if (hintname.equals("lcd_hbgr")) {
1689 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1690 } else if (hintname.equals("lcd_vrgb")) {
1691 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1692 } else if (hintname.equals("lcd_vbgr")) {
1693 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1694 }
1695 if (aaHint != null) {
1696 RenderingHints map = new RenderingHints(null);
1697 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1698 return map;
1699 } else {
1700 return null;
1701 }
1702 }
1703
1704 /* This method determines whether to use the system font settings,
1705 * or ignore them if a L&F has specified they should be ignored, or
1706 * to override both of these with a system property specified value.
1707 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1708 * system property isn't applied as desktop properties are considered
1709 * to be inapplicable in that case. In that headless case although
1710 * this method will return "true" the toolkit will return a null map.
1711 */
1712 private static boolean useSystemAAFontSettings() {
1713 if (!checkedSystemAAFontSettings) {
1714 useSystemAAFontSettings = true; /* initially set this true */
1715 String systemAAFonts = null;
1716 Toolkit tk = Toolkit.getDefaultToolkit();
1717 if (tk instanceof SunToolkit) {
1718 systemAAFonts =
1719 AccessController.doPrivileged(
1720 new GetPropertyAction("awt.useSystemAAFontSettings"));
1721 }
1722 if (systemAAFonts != null) {
1723 useSystemAAFontSettings =
1724 Boolean.valueOf(systemAAFonts).booleanValue();
1725 /* If it is anything other than "true", then it may be
1726 * a hint name , or it may be "off, "default", etc.
1727 */
1728 if (!useSystemAAFontSettings) {
1729 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1730 }
1731 }
1732 /* If its still true, apply the extra condition */
1733 if (useSystemAAFontSettings) {
1734 useSystemAAFontSettings = lastExtraCondition;
1735 }
1736 checkedSystemAAFontSettings = true;
1737 }
1738 return useSystemAAFontSettings;
1739 }
1740
1741 /* A variable defined for the convenience of JDK code */
1742 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1743
1744 /* Overridden by subclasses to return platform/desktop specific values */
1745 protected RenderingHints getDesktopAAHints() {
1746 return null;
1747 }
1748
1749 /* Subclass desktop property loading methods call this which
1750 * in turn calls the appropriate subclass implementation of
1751 * getDesktopAAHints() when system settings are being used.
1752 * Its public rather than protected because subclasses may delegate
1753 * to a helper class.
1754 */
1755 public static RenderingHints getDesktopFontHints() {
1756 if (useSystemAAFontSettings()) {
1757 Toolkit tk = Toolkit.getDefaultToolkit();
1758 if (tk instanceof SunToolkit) {
1759 Object map = ((SunToolkit)tk).getDesktopAAHints();
1760 return (RenderingHints)map;
1761 } else { /* Headless Toolkit */
1762 return null;
1763 }
1764 } else if (desktopFontHints != null) {
1765 /* cloning not necessary as the return value is cloned later, but
1766 * its harmless.
1767 */
1768 return (RenderingHints)(desktopFontHints.clone());
1769 } else {
1770 return null;
1771 }
1772 }
1773
1774
1775 public abstract boolean isDesktopSupported();
1776 public abstract boolean isTaskbarSupported();
1777
1778 /*
1779 * consumeNextKeyTyped() method is not currently used,
1780 * however Swing could use it in the future.
1781 */
1782 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1783 try {
1784 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1785 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1786 getCurrentKeyboardFocusManager(),
1787 keyEvent);
1788 } catch (ClassCastException cce) {
1789 cce.printStackTrace();
1790 }
1791 }
1792
1793 protected static void dumpPeers(final PlatformLogger aLog) {
1794 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1795 }
1796
1797 /**
1798 * Returns the {@code Window} ancestor of the component {@code comp}.
1799 * @return Window ancestor of the component or component by itself if it is Window;
1800 * null, if component is not a part of window hierarchy
1801 */
1802 public static Window getContainingWindow(Component comp) {
1803 while (comp != null && !(comp instanceof Window)) {
1804 comp = comp.getParent();
1805 }
1806 return (Window)comp;
1807 }
1808
1809 private static Boolean sunAwtDisableMixing = null;
1810
1811 /**
1812 * Returns the value of "sun.awt.disableMixing" property. Default
1813 * value is {@code false}.
1814 */
1815 public static synchronized boolean getSunAwtDisableMixing() {
1816 if (sunAwtDisableMixing == null) {
1817 sunAwtDisableMixing = AccessController.doPrivileged(
1818 new GetBooleanAction("sun.awt.disableMixing"));
1819 }
1820 return sunAwtDisableMixing.booleanValue();
1821 }
1822
1823 /**
1824 * Returns true if the native GTK libraries are available. The
1825 * default implementation returns false, but UNIXToolkit overrides this
1826 * method to provide a more specific answer.
1827 */
1828 public boolean isNativeGTKAvailable() {
1829 return false;
1830 }
1831
1832 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1833
1834 public synchronized void setWindowDeactivationTime(Window w, long time) {
1835 AppContext ctx = getAppContext(w);
1836 if (ctx == null) {
1837 return;
1838 }
1839 @SuppressWarnings("unchecked")
1840 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1841 if (map == null) {
1842 map = new WeakHashMap<Window, Long>();
1843 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1844 }
1845 map.put(w, time);
1846 }
1847
1848 public synchronized long getWindowDeactivationTime(Window w) {
1849 AppContext ctx = getAppContext(w);
1850 if (ctx == null) {
1851 return -1;
1852 }
1853 @SuppressWarnings("unchecked")
1854 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1855 if (map == null) {
1856 return -1;
1857 }
1858 Long time = map.get(w);
1859 return time == null ? -1 : time;
1860 }
1861
1862 public void updateScreenMenuBarUI() {
1863 }
1864
1865 // Cosntant alpha
1866 public boolean isWindowOpacitySupported() {
1867 return false;
1868 }
1869
1870 // Shaping
1871 public boolean isWindowShapingSupported() {
1872 return false;
1873 }
1874
1875 // Per-pixel alpha
1876 public boolean isWindowTranslucencySupported() {
1877 return false;
1878 }
1879
1880 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1881 return false;
1882 }
1883
1884 /**
1885 * Returns true if swing backbuffer should be translucent.
1886 */
1887 public boolean isSwingBackbufferTranslucencySupported() {
1888 return false;
1889 }
1890
1891 /**
1892 * Returns whether or not a containing top level window for the passed
1893 * component is
1894 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_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 is opaque (so per-pixel translucency
1899 * is not enabled), {@code false} otherwise
1900 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1901 */
1902 public static boolean isContainingTopLevelOpaque(Component c) {
1903 Window w = getContainingWindow(c);
1904 return w != null && w.isOpaque();
1905 }
1906
1907 /**
1908 * Returns whether or not a containing top level window for the passed
1909 * component is
1910 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1911 *
1912 * @param c a Component which toplevel's to check
1913 * @return {@code true} if the passed component is not null and has a
1914 * containing toplevel window which has opacity less than
1915 * 1.0f (which means that it is translucent), {@code false} otherwise
1916 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1917 */
1918 public static boolean isContainingTopLevelTranslucent(Component c) {
1919 Window w = getContainingWindow(c);
1920 return w != null && w.getOpacity() < 1.0f;
1921 }
1922
1923 /**
1924 * Returns whether the native system requires using the peer.updateWindow()
1925 * method to update the contents of a non-opaque window, or if usual
1926 * painting procedures are sufficient. The default return value covers
1927 * the X11 systems. On MS Windows this method is overriden in WToolkit
1928 * to return true.
1929 */
1930 public boolean needUpdateWindow() {
1931 return false;
1932 }
1933
1934 /**
1935 * Descendants of the SunToolkit should override and put their own logic here.
1936 */
1937 public int getNumberOfButtons(){
1938 return 3;
1939 }
1940
1941 /**
1942 * Checks that the given object implements/extends the given
1943 * interface/class.
1944 *
1945 * Note that using the instanceof operator causes a class to be loaded.
1946 * Using this method doesn't load a class and it can be used instead of
1947 * the instanceof operator for performance reasons.
1948 *
1949 * @param obj Object to be checked
1950 * @param type The name of the interface/class. Must be
1951 * fully-qualified interface/class name.
1952 * @return true, if this object implements/extends the given
1953 * interface/class, false, otherwise, or if obj or type is null
1954 */
1955 public static boolean isInstanceOf(Object obj, String type) {
1956 if (obj == null) return false;
1957 if (type == null) return false;
1958
1959 return isInstanceOf(obj.getClass(), type);
1960 }
1961
1962 private static boolean isInstanceOf(Class<?> cls, String type) {
1963 if (cls == null) return false;
1964
1965 if (cls.getName().equals(type)) {
1966 return true;
1967 }
1968
1969 for (Class<?> c : cls.getInterfaces()) {
1970 if (c.getName().equals(type)) {
1971 return true;
1972 }
1973 }
1974 return isInstanceOf(cls.getSuperclass(), type);
1975 }
1976
1977 protected static LightweightFrame getLightweightFrame(Component c) {
1978 for (; c != null; c = c.getParent()) {
1979 if (c instanceof LightweightFrame) {
1980 return (LightweightFrame)c;
1981 }
1982 if (c instanceof Window) {
1983 // Don't traverse owner windows
1984 return null;
1985 }
1986 }
1987 return null;
1988 }
1989
1990 ///////////////////////////////////////////////////////////////////////////
1991 //
1992 // The following methods help set and identify whether a particular
1993 // AWTEvent object was produced by the system or by user code. As of this
1994 // writing the only consumer is the Java Plug-In, although this information
1995 // could be useful to more clients and probably should be formalized in
1996 // the public API.
1997 //
1998 ///////////////////////////////////////////////////////////////////////////
1999
2000 public static void setSystemGenerated(AWTEvent e) {
2001 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2002 }
2003
2004 public static boolean isSystemGenerated(AWTEvent e) {
2005 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2006 }
2007
2008 } // class SunToolkit
2009
2010
2011 /*
2012 * PostEventQueue is a Thread that runs in the same AppContext as the
2013 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2014 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2015 * events to this queue, which then calls EventQueue.postEvent().
2016 *
2017 * We do this because EventQueue.postEvent() may be overridden by client
2018 * code, and we mustn't ever call client code from the toolkit thread.
2019 */
2020 class PostEventQueue {
2021 private EventQueueItem queueHead = null;
2022 private EventQueueItem queueTail = null;
2023 private final EventQueue eventQueue;
2024
2025 private Thread flushThread = null;
2026
2027 PostEventQueue(EventQueue eq) {
2028 eventQueue = eq;
2029 }
2030
2031 /*
2032 * Continually post pending AWTEvents to the Java EventQueue. The method
2033 * is synchronized to ensure the flush is completed before a new event
2034 * can be posted to this queue.
2035 *
2036 * 7177040: The method couldn't be wholly synchronized because of calls
2037 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2038 * potentially lead to deadlock
2039 */
2040 public void flush() {
2041
2042 Thread newThread = Thread.currentThread();
2043
2044 try {
2045 EventQueueItem tempQueue;
2046 synchronized (this) {
2047 // Avoid method recursion
2048 if (newThread == flushThread) {
2049 return;
2050 }
2051 // Wait for other threads' flushing
2052 while (flushThread != null) {
2053 wait();
2054 }
2055 // Skip everything if queue is empty
2056 if (queueHead == null) {
2057 return;
2058 }
2059 // Remember flushing thread
2060 flushThread = newThread;
2061
2062 tempQueue = queueHead;
2063 queueHead = queueTail = null;
2064 }
2065 try {
2066 while (tempQueue != null) {
2067 eventQueue.postEvent(tempQueue.event);
2068 tempQueue = tempQueue.next;
2069 }
2070 }
2071 finally {
2072 // Only the flushing thread can get here
2073 synchronized (this) {
2074 // Forget flushing thread, inform other pending threads
2075 flushThread = null;
2076 notifyAll();
2077 }
2078 }
2079 }
2080 catch (InterruptedException e) {
2081 // Couldn't allow exception go up, so at least recover the flag
2082 newThread.interrupt();
2083 }
2084 }
2085
2086 /*
2087 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2088 */
2089 void postEvent(AWTEvent event) {
2090 EventQueueItem item = new EventQueueItem(event);
2091
2092 synchronized (this) {
2093 if (queueHead == null) {
2094 queueHead = queueTail = item;
2095 } else {
2096 queueTail.next = item;
2097 queueTail = item;
2098 }
2099 }
2100 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2101 }
2102 } // class PostEventQueue