1 /*
2 * Copyright (c) 1997, 2015, 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.misc.SoftCache;
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 final static 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</code> then the focus
343 * requests on lightweight components will be performed
344 * synchronously, if it is <code>false</code>, 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 private static FocusTraversalPolicy createLayoutPolicy() {
377 FocusTraversalPolicy policy = null;
378 try {
379 Class<?> layoutPolicyClass =
380 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
381 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
382 }
383 catch (ClassNotFoundException e) {
384 assert false;
385 }
386 catch (InstantiationException e) {
387 assert false;
388 }
389 catch (IllegalAccessException e) {
390 assert false;
391 }
392
393 return policy;
394 }
395
396 /*
397 * Insert a mapping from target to AppContext, for later retrieval
398 * via targetToAppContext() above.
399 */
400 public static void insertTargetMapping(Object target, AppContext appContext) {
401 if (!setAppContext(target, appContext)) {
402 // Target is not a Component/MenuComponent, use the private Map
403 // instead.
404 appContextMap.put(target, appContext);
405 }
406 }
407
408 /*
409 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
410 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
411 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
412 * not be called under another lock since it locks the EventQueue.
413 * See bugids 4632918, 4526597.
414 */
415 public static void postEvent(AppContext appContext, AWTEvent event) {
416 if (event == null) {
417 throw new NullPointerException();
418 }
419
420 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
421 if (sea != null && sea.isSequencedEvent(event)) {
422 AWTEvent nested = sea.getNested(event);
423 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
424 nested instanceof TimedWindowEvent)
425 {
426 TimedWindowEvent twe = (TimedWindowEvent)nested;
427 ((SunToolkit)Toolkit.getDefaultToolkit()).
428 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
429 }
430 }
431
432 // All events posted via this method are system-generated.
433 // Placing the following call here reduces considerably the
434 // number of places throughout the toolkit that would
435 // otherwise have to be modified to precisely identify
436 // system-generated events.
437 setSystemGenerated(event);
438 AppContext eventContext = targetToAppContext(event.getSource());
439 if (eventContext != null && !eventContext.equals(appContext)) {
440 throw new RuntimeException("Event posted on wrong app context : " + event);
441 }
442 PostEventQueue postEventQueue =
443 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
444 if (postEventQueue != null) {
445 postEventQueue.postEvent(event);
446 }
447 }
448
449 /*
450 * Post AWTEvent of high priority.
451 */
452 public static void postPriorityEvent(final AWTEvent e) {
453 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
454 @Override
455 public void run() {
456 AWTAccessor.getAWTEventAccessor().setPosted(e);
457 ((Component)e.getSource()).dispatchEvent(e);
458 }
459 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
460 postEvent(targetToAppContext(e.getSource()), pe);
461 }
462
463 /*
464 * Flush any pending events which haven't been posted to the AWT
465 * EventQueue yet.
466 */
467 public static void flushPendingEvents() {
468 AppContext appContext = AppContext.getAppContext();
469 flushPendingEvents(appContext);
470 }
471
472 /*
473 * Flush the PostEventQueue for the right AppContext.
474 * The default flushPendingEvents only flushes the thread-local context,
475 * which is not always correct, c.f. 3746956
476 */
477 public static void flushPendingEvents(AppContext appContext) {
478 PostEventQueue postEventQueue =
479 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
480 if (postEventQueue != null) {
481 postEventQueue.flush();
482 }
483 }
484
485 /*
486 * Execute a chunk of code on the Java event handler thread for the
487 * given target. Does not wait for the execution to occur before
488 * returning to the caller.
489 */
490 public static void executeOnEventHandlerThread(Object target,
491 Runnable runnable) {
492 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
493 }
494
495 /*
496 * Fixed 5064013: the InvocationEvent time should be equals
497 * the time of the ActionEvent
498 */
499 @SuppressWarnings("serial")
500 public static void executeOnEventHandlerThread(Object target,
501 Runnable runnable,
502 final long when) {
503 executeOnEventHandlerThread(
504 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
505 @Override
506 public long getWhen() {
507 return when;
508 }
509 });
510 }
511
512 /*
513 * Execute a chunk of code on the Java event handler thread for the
514 * given target. Does not wait for the execution to occur before
515 * returning to the caller.
516 */
517 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
518 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
519 }
520
521 /*
522 * Execute a chunk of code on the Java event handler thread. The
523 * method takes into account provided AppContext and sets
524 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
525 * event. See 6451487 for detailes.
526 * Does not wait for the execution to occur before returning to
527 * the caller.
528 */
529 public static void invokeLaterOnAppContext(
530 AppContext appContext, Runnable dispatcher)
531 {
532 postEvent(appContext,
533 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
534 PeerEvent.PRIORITY_EVENT));
535 }
536
537 /*
538 * Execute a chunk of code on the Java event handler thread for the
539 * given target. Waits for the execution to occur before returning
540 * to the caller.
541 */
542 public static void executeOnEDTAndWait(Object target, Runnable runnable)
543 throws InterruptedException, InvocationTargetException
544 {
545 if (EventQueue.isDispatchThread()) {
546 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
547 }
548
549 class AWTInvocationLock {}
550 Object lock = new AWTInvocationLock();
551
552 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
553
554 synchronized (lock) {
555 executeOnEventHandlerThread(event);
556 while(!event.isDispatched()) {
557 lock.wait();
558 }
559 }
560
561 Throwable eventThrowable = event.getThrowable();
562 if (eventThrowable != null) {
563 throw new InvocationTargetException(eventThrowable);
564 }
565 }
566
567 /*
568 * Returns true if the calling thread is the event dispatch thread
569 * contained within AppContext which associated with the given target.
570 * Use this call to ensure that a given task is being executed
571 * (or not being) on the event dispatch thread for the given target.
572 */
573 public static boolean isDispatchThreadForAppContext(Object target) {
574 AppContext appContext = targetToAppContext(target);
575 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
576
577 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
578 return accessor.isDispatchThreadImpl(eq);
579 }
580
581 @Override
582 public Dimension getScreenSize() {
583 return new Dimension(getScreenWidth(), getScreenHeight());
584 }
585 protected abstract int getScreenWidth();
586 protected abstract int getScreenHeight();
587
588 @Override
589 @SuppressWarnings("deprecation")
590 public FontMetrics getFontMetrics(Font font) {
591 return FontDesignMetrics.getMetrics(font);
592 }
593
594 @Override
595 @SuppressWarnings("deprecation")
596 public String[] getFontList() {
597 String[] hardwiredFontList = {
598 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
599 Font.DIALOG_INPUT
600
601 // -- Obsolete font names from 1.0.2. It was decided that
602 // -- getFontList should not return these old names:
603 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
604 };
605 return hardwiredFontList;
606 }
607
608 /**
609 * Disables erasing of background on the canvas before painting if
610 * this is supported by the current toolkit. It is recommended to
611 * call this method early, before the Canvas becomes displayable,
612 * because some Toolkit implementations do not support changing
613 * this property once the Canvas becomes displayable.
614 */
615 public void disableBackgroundErase(Canvas canvas) {
616 disableBackgroundEraseImpl(canvas);
617 }
618
619 /**
620 * Disables the native erasing of the background on the given
621 * component before painting if this is supported by the current
622 * toolkit. This only has an effect for certain components such as
623 * Canvas, Panel and Window. It is recommended to call this method
624 * early, before the Component becomes displayable, because some
625 * Toolkit implementations do not support changing this property
626 * once the Component becomes displayable.
627 */
628 public void disableBackgroundErase(Component component) {
629 disableBackgroundEraseImpl(component);
630 }
631
632 private void disableBackgroundEraseImpl(Component component) {
633 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
634 }
635
636 /**
637 * Returns the value of "sun.awt.noerasebackground" property. Default
638 * value is {@code false}.
639 */
640 public static boolean getSunAwtNoerasebackground() {
641 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
642 }
643
644 /**
645 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
646 * value is {@code false}.
647 */
648 public static boolean getSunAwtErasebackgroundonresize() {
649 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
650 }
651
652
653 @SuppressWarnings("deprecation")
654 static final SoftCache imgCache = new SoftCache();
655
656 static Image getImageFromHash(Toolkit tk, URL url) {
657 checkPermissions(url);
658 synchronized (imgCache) {
659 Image img = (Image)imgCache.get(url);
660 if (img == null) {
661 try {
662 img = tk.createImage(new URLImageSource(url));
663 imgCache.put(url, img);
664 } catch (Exception e) {
665 }
666 }
667 return img;
668 }
669 }
670
671 static Image getImageFromHash(Toolkit tk,
672 String filename) {
673 checkPermissions(filename);
674 synchronized (imgCache) {
675 Image img = (Image)imgCache.get(filename);
676 if (img == null) {
677 try {
678 img = tk.createImage(new FileImageSource(filename));
679 imgCache.put(filename, img);
680 } catch (Exception e) {
681 }
682 }
683 return img;
684 }
685 }
686
687 @Override
688 public Image getImage(String filename) {
689 return getImageFromHash(this, filename);
690 }
691
692 @Override
693 public Image getImage(URL url) {
694 return getImageFromHash(this, url);
695 }
696
697 protected Image getImageWithResolutionVariant(String fileName,
698 String resolutionVariantName) {
699 synchronized (imgCache) {
700 Image image = getImageFromHash(this, fileName);
701 if (image instanceof MultiResolutionImage) {
702 return image;
703 }
704 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
705 image = createImageWithResolutionVariant(image, resolutionVariant);
706 imgCache.put(fileName, image);
707 return image;
708 }
709 }
710
711 protected Image getImageWithResolutionVariant(URL url,
712 URL resolutionVariantURL) {
713 synchronized (imgCache) {
714 Image image = getImageFromHash(this, url);
715 if (image instanceof MultiResolutionImage) {
716 return image;
717 }
718 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
719 image = createImageWithResolutionVariant(image, resolutionVariant);
720 imgCache.put(url, image);
721 return image;
722 }
723 }
724
725
726 @Override
727 public Image createImage(String filename) {
728 checkPermissions(filename);
729 return createImage(new FileImageSource(filename));
730 }
731
732 @Override
733 public Image createImage(URL url) {
734 checkPermissions(url);
735 return createImage(new URLImageSource(url));
736 }
737
738 @Override
739 public Image createImage(byte[] data, int offset, int length) {
740 return createImage(new ByteArrayImageSource(data, offset, length));
741 }
742
743 @Override
744 public Image createImage(ImageProducer producer) {
745 return new ToolkitImage(producer);
746 }
747
748 public static Image createImageWithResolutionVariant(Image image,
749 Image resolutionVariant) {
750 return new MultiResolutionToolkitImage(image, resolutionVariant);
751 }
752
753 @Override
754 public int checkImage(Image img, int w, int h, ImageObserver o) {
755 if (!(img instanceof ToolkitImage)) {
756 return ImageObserver.ALLBITS;
757 }
758
759 ToolkitImage tkimg = (ToolkitImage)img;
760 int repbits;
761 if (w == 0 || h == 0) {
762 repbits = ImageObserver.ALLBITS;
763 } else {
764 repbits = tkimg.getImageRep().check(o);
765 }
766 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
767 }
768
769 @Override
770 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
771 if (w == 0 || h == 0) {
772 return true;
773 }
774
775 // Must be a ToolkitImage
776 if (!(img instanceof ToolkitImage)) {
777 return true;
778 }
779
780 ToolkitImage tkimg = (ToolkitImage)img;
781 if (tkimg.hasError()) {
782 if (o != null) {
783 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
784 -1, -1, -1, -1);
785 }
786 return false;
787 }
788 ImageRepresentation ir = tkimg.getImageRep();
789 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
790 }
791
792 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
793 ToolkitImage rvImage = getResolutionVariant(img);
794 int rvw = getRVSize(w);
795 int rvh = getRVSize(h);
796 // Ignore the resolution variant in case of error
797 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
798 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
799 getResolutionVariantObserver(
800 img, o, w, h, rvw, rvh, true));
801 }
802
803 private boolean prepareResolutionVariant(Image img, int w, int h,
804 ImageObserver o) {
805
806 ToolkitImage rvImage = getResolutionVariant(img);
807 int rvw = getRVSize(w);
808 int rvh = getRVSize(h);
809 // Ignore the resolution variant in case of error
810 return rvImage == null || rvImage.hasError() || prepareImage(
811 rvImage, rvw, rvh,
812 MultiResolutionToolkitImage.getResolutionVariantObserver(
813 img, o, w, h, rvw, rvh, true));
814 }
815
816 private static int getRVSize(int size){
817 return size == -1 ? -1 : 2 * size;
818 }
819
820 private static ToolkitImage getResolutionVariant(Image image) {
821 if (image instanceof MultiResolutionToolkitImage) {
822 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
823 getResolutionVariant();
824 if (resolutionVariant instanceof ToolkitImage) {
825 return (ToolkitImage) resolutionVariant;
826 }
827 }
828 return null;
829 }
830
831 protected static boolean imageCached(Object key) {
832 return imgCache.containsKey(key);
833 }
834
835 protected static boolean imageExists(String filename) {
836 if (filename != null) {
837 checkPermissions(filename);
838 return new File(filename).exists();
839 }
840 return false;
841 }
842
843 @SuppressWarnings("try")
844 protected static boolean imageExists(URL url) {
845 if (url != null) {
846 checkPermissions(url);
847 try (InputStream is = url.openStream()) {
848 return true;
849 }catch(IOException e){
850 return false;
851 }
852 }
853 return false;
854 }
855
856 private static void checkPermissions(String filename) {
857 SecurityManager security = System.getSecurityManager();
858 if (security != null) {
859 security.checkRead(filename);
860 }
861 }
862
863 private static void checkPermissions(URL url) {
864 SecurityManager sm = System.getSecurityManager();
865 if (sm != null) {
866 try {
867 java.security.Permission perm =
868 URLUtil.getConnectPermission(url);
869 if (perm != null) {
870 try {
871 sm.checkPermission(perm);
872 } catch (SecurityException se) {
873 // fallback to checkRead/checkConnect for pre 1.2
874 // security managers
875 if ((perm instanceof java.io.FilePermission) &&
876 perm.getActions().indexOf("read") != -1) {
877 sm.checkRead(perm.getName());
878 } else if ((perm instanceof
879 java.net.SocketPermission) &&
880 perm.getActions().indexOf("connect") != -1) {
881 sm.checkConnect(url.getHost(), url.getPort());
882 } else {
883 throw se;
884 }
885 }
886 }
887 } catch (java.io.IOException ioe) {
888 sm.checkConnect(url.getHost(), url.getPort());
889 }
890 }
891 }
892
893 /**
894 * Scans {@code imageList} for best-looking image of specified dimensions.
895 * Image can be scaled and/or padded with transparency.
896 */
897 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
898 if (width == 0 || height == 0) {
899 return null;
900 }
901 Image bestImage = null;
902 int bestWidth = 0;
903 int bestHeight = 0;
904 double bestSimilarity = 3; //Impossibly high value
905 double bestScaleFactor = 0;
906 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
907 //Iterate imageList looking for best matching image.
908 //'Similarity' measure is defined as good scale factor and small insets.
909 //best possible similarity is 0 (no scale, no insets).
910 //It's found while the experiments that good-looking result is achieved
911 //with scale factors x1, x3/4, x2/3, xN, x1/N.
912 Image im = i.next();
913 if (im == null) {
914 continue;
915 }
916 if (im instanceof ToolkitImage) {
917 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
918 ir.reconstruct(ImageObserver.ALLBITS);
919 }
920 int iw;
921 int ih;
922 try {
923 iw = im.getWidth(null);
924 ih = im.getHeight(null);
925 } catch (Exception e){
926 continue;
927 }
928 if (iw > 0 && ih > 0) {
929 //Calc scale factor
930 double scaleFactor = Math.min((double)width / (double)iw,
931 (double)height / (double)ih);
932 //Calculate scaled image dimensions
933 //adjusting scale factor to nearest "good" value
934 int adjw = 0;
935 int adjh = 0;
936 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
937 if (scaleFactor >= 2) {
938 //Need to enlarge image more than twice
939 //Round down scale factor to multiply by integer value
940 scaleFactor = Math.floor(scaleFactor);
941 adjw = iw * (int)scaleFactor;
942 adjh = ih * (int)scaleFactor;
943 scaleMeasure = 1.0 - 0.5 / scaleFactor;
944 } else if (scaleFactor >= 1) {
945 //Don't scale
946 scaleFactor = 1.0;
947 adjw = iw;
948 adjh = ih;
949 scaleMeasure = 0;
950 } else if (scaleFactor >= 0.75) {
951 //Multiply by 3/4
952 scaleFactor = 0.75;
953 adjw = iw * 3 / 4;
954 adjh = ih * 3 / 4;
955 scaleMeasure = 0.3;
956 } else if (scaleFactor >= 0.6666) {
957 //Multiply by 2/3
958 scaleFactor = 0.6666;
959 adjw = iw * 2 / 3;
960 adjh = ih * 2 / 3;
961 scaleMeasure = 0.33;
962 } else {
963 //Multiply size by 1/scaleDivider
964 //where scaleDivider is minimum possible integer
965 //larger than 1/scaleFactor
966 double scaleDivider = Math.ceil(1.0 / scaleFactor);
967 scaleFactor = 1.0 / scaleDivider;
968 adjw = (int)Math.round((double)iw / scaleDivider);
969 adjh = (int)Math.round((double)ih / scaleDivider);
970 scaleMeasure = 1.0 - 1.0 / scaleDivider;
971 }
972 double similarity = ((double)width - (double)adjw) / (double)width +
973 ((double)height - (double)adjh) / (double)height + //Large padding is bad
974 scaleMeasure; //Large rescale is bad
975 if (similarity < bestSimilarity) {
976 bestSimilarity = similarity;
977 bestScaleFactor = scaleFactor;
978 bestImage = im;
979 bestWidth = adjw;
980 bestHeight = adjh;
981 }
982 if (similarity == 0) break;
983 }
984 }
985 if (bestImage == null) {
986 //No images were found, possibly all are broken
987 return null;
988 }
989 BufferedImage bimage =
990 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
991 Graphics2D g = bimage.createGraphics();
992 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
993 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
994 try {
995 int x = (width - bestWidth) / 2;
996 int y = (height - bestHeight) / 2;
997 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
998 } finally {
999 g.dispose();
1000 }
1001 return bimage;
1002 }
1003
1004 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1005 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1006 if (bimage == null) {
1007 return null;
1008 }
1009 Raster raster = bimage.getRaster();
1010 DataBuffer buffer = raster.getDataBuffer();
1011 return (DataBufferInt)buffer;
1012 }
1013
1014 @Override
1015 protected EventQueue getSystemEventQueueImpl() {
1016 return getSystemEventQueueImplPP();
1017 }
1018
1019 // Package private implementation
1020 static EventQueue getSystemEventQueueImplPP() {
1021 return getSystemEventQueueImplPP(AppContext.getAppContext());
1022 }
1023
1024 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1025 EventQueue theEventQueue =
1026 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1027 return theEventQueue;
1028 }
1029
1030 /**
1031 * Give native peers the ability to query the native container
1032 * given a native component (eg the direct parent may be lightweight).
1033 */
1034 public static Container getNativeContainer(Component c) {
1035 return Toolkit.getNativeContainer(c);
1036 }
1037
1038 /**
1039 * Gives native peers the ability to query the closest HW component.
1040 * If the given component is heavyweight, then it returns this. Otherwise,
1041 * it goes one level up in the hierarchy and tests next component.
1042 */
1043 public static Component getHeavyweightComponent(Component c) {
1044 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1045 c = AWTAccessor.getComponentAccessor().getParent(c);
1046 }
1047 return c;
1048 }
1049
1050 /**
1051 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1052 */
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 public boolean isPrintableCharacterModifiersMask(int mods) {
1064 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1065 }
1066
1067 /**
1068 * Returns whether popup is allowed to be shown above the task bar.
1069 * This is a default implementation of this method, which checks
1070 * corresponding security permission.
1071 */
1072 public boolean canPopupOverlapTaskBar() {
1073 boolean result = true;
1074 try {
1075 SecurityManager sm = System.getSecurityManager();
1076 if (sm != null) {
1077 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1078 }
1079 } catch (SecurityException se) {
1080 // There is no permission to show popups over the task bar
1081 result = false;
1082 }
1083 return result;
1084 }
1085
1086 /**
1087 * Returns a new input method window, with behavior as specified in
1088 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1089 * If the inputContext is not null, the window should return it from its
1090 * getInputContext() method. The window needs to implement
1091 * sun.awt.im.InputMethodWindow.
1092 * <p>
1093 * SunToolkit subclasses can override this method to return better input
1094 * method windows.
1095 */
1096 @Override
1097 public Window createInputMethodWindow(String title, InputContext context) {
1098 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1099 }
1100
1101 /**
1102 * Returns whether enableInputMethods should be set to true for peered
1103 * TextComponent instances on this platform. False by default.
1104 */
1105 @Override
1106 public boolean enableInputMethodsForTextComponent() {
1107 return false;
1108 }
1109
1110 private static Locale startupLocale = null;
1111
1112 /**
1113 * Returns the locale in which the runtime was started.
1114 */
1115 public static Locale getStartupLocale() {
1116 if (startupLocale == null) {
1117 String language, region, country, variant;
1118 language = AccessController.doPrivileged(
1119 new GetPropertyAction("user.language", "en"));
1120 // for compatibility, check for old user.region property
1121 region = AccessController.doPrivileged(
1122 new GetPropertyAction("user.region"));
1123 if (region != null) {
1124 // region can be of form country, country_variant, or _variant
1125 int i = region.indexOf('_');
1126 if (i >= 0) {
1127 country = region.substring(0, i);
1128 variant = region.substring(i + 1);
1129 } else {
1130 country = region;
1131 variant = "";
1132 }
1133 } else {
1134 country = AccessController.doPrivileged(
1135 new GetPropertyAction("user.country", ""));
1136 variant = AccessController.doPrivileged(
1137 new GetPropertyAction("user.variant", ""));
1138 }
1139 startupLocale = new Locale(language, country, variant);
1140 }
1141 return startupLocale;
1142 }
1143
1144 /**
1145 * Returns the default keyboard locale of the underlying operating system
1146 */
1147 @Override
1148 public Locale getDefaultKeyboardLocale() {
1149 return getStartupLocale();
1150 }
1151
1152 private static DefaultMouseInfoPeer mPeer = null;
1153
1154 @Override
1155 public synchronized MouseInfoPeer getMouseInfoPeer() {
1156 if (mPeer == null) {
1157 mPeer = new DefaultMouseInfoPeer();
1158 }
1159 return mPeer;
1160 }
1161
1162
1163 /**
1164 * Returns whether default toolkit needs the support of the xembed
1165 * from embedding host(if any).
1166 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1167 */
1168 public static boolean needsXEmbed() {
1169 String noxembed = AccessController.
1170 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1171 if ("true".equals(noxembed)) {
1172 return false;
1173 }
1174
1175 Toolkit tk = Toolkit.getDefaultToolkit();
1176 if (tk instanceof SunToolkit) {
1177 // SunToolkit descendants should override this method to specify
1178 // concrete behavior
1179 return ((SunToolkit)tk).needsXEmbedImpl();
1180 } else {
1181 // Non-SunToolkit doubtly might support XEmbed
1182 return false;
1183 }
1184 }
1185
1186 /**
1187 * Returns whether this toolkit needs the support of the xembed
1188 * from embedding host(if any).
1189 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1190 */
1191 protected boolean needsXEmbedImpl() {
1192 return false;
1193 }
1194
1195 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1196
1197 /**
1198 * Returns whether the XEmbed server feature is requested by
1199 * developer. If true, Toolkit should return an
1200 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1201 */
1202 protected final boolean isXEmbedServerRequested() {
1203 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1204 }
1205
1206 /**
1207 * Returns whether the modal exclusion API is supported by the current toolkit.
1208 * When it isn't supported, calling <code>setModalExcluded</code> has no
1209 * effect, and <code>isModalExcluded</code> returns false for all windows.
1210 *
1211 * @return true if modal exclusion is supported by the toolkit, false otherwise
1212 *
1213 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1214 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1215 *
1216 * @since 1.5
1217 */
1218 public static boolean isModalExcludedSupported()
1219 {
1220 Toolkit tk = Toolkit.getDefaultToolkit();
1221 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1222 }
1223 /*
1224 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1225 *
1226 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1227 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1228 *
1229 * @since 1.5
1230 */
1231 protected boolean isModalExcludedSupportedImpl()
1232 {
1233 return false;
1234 }
1235
1236 /*
1237 * Sets this window to be excluded from being modally blocked. When the
1238 * toolkit supports modal exclusion and this method is called, input
1239 * events, focus transfer and z-order will continue to work for the
1240 * window, it's owned windows and child components, even in the
1241 * presence of a modal dialog.
1242 * For details on which <code>Window</code>s are normally blocked
1243 * by modal dialog, see {@link java.awt.Dialog}.
1244 * Invoking this method when the modal exclusion API is not supported by
1245 * the current toolkit has no effect.
1246 * @param window Window to be marked as not modally blocked
1247 * @see java.awt.Dialog
1248 * @see java.awt.Dialog#setModal(boolean)
1249 * @see sun.awt.SunToolkit#isModalExcludedSupported
1250 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1251 */
1252 public static void setModalExcluded(Window window)
1253 {
1254 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1255 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1256 }
1257 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1258 }
1259
1260 /*
1261 * Returns whether the specified window is blocked by modal dialogs.
1262 * If the modal exclusion API isn't supported by the current toolkit,
1263 * it returns false for all windows.
1264 *
1265 * @param window Window to test for modal exclusion
1266 *
1267 * @return true if the window is modal excluded, false otherwise. If
1268 * the modal exclusion isn't supported by the current Toolkit, false
1269 * is returned
1270 *
1271 * @see sun.awt.SunToolkit#isModalExcludedSupported
1272 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1273 *
1274 * @since 1.5
1275 */
1276 public static boolean isModalExcluded(Window window)
1277 {
1278 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1279 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1280 }
1281 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1282 }
1283
1284 /**
1285 * Overridden in XToolkit and WToolkit
1286 */
1287 @Override
1288 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1289 return (modalityType == Dialog.ModalityType.MODELESS) ||
1290 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1291 }
1292
1293 /**
1294 * Overridden in XToolkit and WToolkit
1295 */
1296 @Override
1297 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1298 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1299 }
1300
1301 ///////////////////////////////////////////////////////////////////////////
1302 //
1303 // The following is used by the Java Plug-in to coordinate dialog modality
1304 // between containing applications (browsers, ActiveX containers etc) and
1305 // the AWT.
1306 //
1307 ///////////////////////////////////////////////////////////////////////////
1308
1309 private ModalityListenerList modalityListeners = new ModalityListenerList();
1310
1311 public void addModalityListener(ModalityListener listener) {
1312 modalityListeners.add(listener);
1313 }
1314
1315 public void removeModalityListener(ModalityListener listener) {
1316 modalityListeners.remove(listener);
1317 }
1318
1319 public void notifyModalityPushed(Dialog dialog) {
1320 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1321 }
1322
1323 public void notifyModalityPopped(Dialog dialog) {
1324 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1325 }
1326
1327 final void notifyModalityChange(int id, Dialog source) {
1328 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1329 ev.dispatch();
1330 }
1331
1332 static class ModalityListenerList implements ModalityListener {
1333
1334 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1335
1336 void add(ModalityListener listener) {
1337 listeners.addElement(listener);
1338 }
1339
1340 void remove(ModalityListener listener) {
1341 listeners.removeElement(listener);
1342 }
1343
1344 @Override
1345 public void modalityPushed(ModalityEvent ev) {
1346 Iterator<ModalityListener> it = listeners.iterator();
1347 while (it.hasNext()) {
1348 it.next().modalityPushed(ev);
1349 }
1350 }
1351
1352 @Override
1353 public void modalityPopped(ModalityEvent ev) {
1354 Iterator<ModalityListener> it = listeners.iterator();
1355 while (it.hasNext()) {
1356 it.next().modalityPopped(ev);
1357 }
1358 }
1359 } // end of class ModalityListenerList
1360
1361 ///////////////////////////////////////////////////////////////////////////
1362 // End Plug-in code
1363 ///////////////////////////////////////////////////////////////////////////
1364
1365 public static boolean isLightweightOrUnknown(Component comp) {
1366 if (comp.isLightweight()
1367 || !(getDefaultToolkit() instanceof SunToolkit))
1368 {
1369 return true;
1370 }
1371 return !(comp instanceof Button
1372 || comp instanceof Canvas
1373 || comp instanceof Checkbox
1374 || comp instanceof Choice
1375 || comp instanceof Label
1376 || comp instanceof java.awt.List
1377 || comp instanceof Panel
1378 || comp instanceof Scrollbar
1379 || comp instanceof ScrollPane
1380 || comp instanceof TextArea
1381 || comp instanceof TextField
1382 || comp instanceof Window);
1383 }
1384
1385 @SuppressWarnings("serial")
1386 public static class OperationTimedOut extends RuntimeException {
1387 public OperationTimedOut(String msg) {
1388 super(msg);
1389 }
1390 public OperationTimedOut() {
1391 }
1392 }
1393
1394 @SuppressWarnings("serial")
1395 public static class InfiniteLoop extends RuntimeException {
1396 }
1397
1398 @SuppressWarnings("serial")
1399 public static class IllegalThreadException extends RuntimeException {
1400 public IllegalThreadException(String msg) {
1401 super(msg);
1402 }
1403 public IllegalThreadException() {
1404 }
1405 }
1406
1407 public static final int DEFAULT_WAIT_TIME = 10000;
1408 private static final int MAX_ITERS = 20;
1409 private static final int MIN_ITERS = 0;
1410 private static final int MINIMAL_EDELAY = 0;
1411
1412 /**
1413 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1414 */
1415 public void realSync() throws OperationTimedOut, InfiniteLoop {
1416 realSync(DEFAULT_WAIT_TIME);
1417 }
1418
1419 /**
1420 * Forces toolkit to synchronize with the native windowing
1421 * sub-system, flushing all pending work and waiting for all the
1422 * events to be processed. This method guarantees that after
1423 * return no additional Java events will be generated, unless
1424 * cause by user. Obviously, the method cannot be used on the
1425 * event dispatch thread (EDT). In case it nevertheless gets
1426 * invoked on this thread, the method throws the
1427 * IllegalThreadException runtime exception.
1428 *
1429 * <p> This method allows to write tests without explicit timeouts
1430 * or wait for some event. Example:
1431 * <code>
1432 * Frame f = ...;
1433 * f.setVisible(true);
1434 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1435 * </code>
1436 *
1437 * <p> After realSync, <code>f</code> will be completely visible
1438 * on the screen, its getLocationOnScreen will be returning the
1439 * right result and it will be the focus owner.
1440 *
1441 * <p> Another example:
1442 * <code>
1443 * b.requestFocus();
1444 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1445 * </code>
1446 *
1447 * <p> After realSync, <code>b</code> will be focus owner.
1448 *
1449 * <p> Notice that realSync isn't guaranteed to work if recurring
1450 * actions occur, such as if during processing of some event
1451 * another request which may generate some events occurs. By
1452 * default, sync tries to perform as much as {@value #MAX_ITERS}
1453 * cycles of event processing, allowing for roughly {@value
1454 * #MAX_ITERS} additional requests.
1455 *
1456 * <p> For example, requestFocus() generates native request, which
1457 * generates one or two Java focus events, which then generate a
1458 * serie of paint events, a serie of Java focus events, which then
1459 * generate a serie of paint events which then are processed -
1460 * three cycles, minimum.
1461 *
1462 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1463 */
1464 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1465 {
1466 if (EventQueue.isDispatchThread()) {
1467 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1468 }
1469 int bigLoop = 0;
1470 do {
1471 // Let's do sync first
1472 sync();
1473
1474 // During the wait process, when we were processing incoming
1475 // events, we could have made some new request, which can
1476 // generate new events. Example: MapNotify/XSetInputFocus.
1477 // Therefore, we dispatch them as long as there is something
1478 // to dispatch.
1479 int iters = 0;
1480 while (iters < MIN_ITERS) {
1481 syncNativeQueue(timeout);
1482 iters++;
1483 }
1484 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1485 iters++;
1486 }
1487 if (iters >= MAX_ITERS) {
1488 throw new InfiniteLoop();
1489 }
1490
1491 // native requests were dispatched by X/Window Manager or Windows
1492 // Moreover, we processed them all on Toolkit thread
1493 // Now wait while EDT processes them.
1494 //
1495 // During processing of some events (focus, for example),
1496 // some other events could have been generated. So, after
1497 // waitForIdle, we may end up with full EventQueue
1498 iters = 0;
1499 while (iters < MIN_ITERS) {
1500 waitForIdle(timeout);
1501 iters++;
1502 }
1503 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1504 iters++;
1505 }
1506 if (iters >= MAX_ITERS) {
1507 throw new InfiniteLoop();
1508 }
1509
1510 bigLoop++;
1511 // Again, for Java events, it was simple to check for new Java
1512 // events by checking event queue, but what if Java events
1513 // resulted in native requests? Therefor, check native events again.
1514 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1515 }
1516
1517 /**
1518 * Platform toolkits need to implement this method to perform the
1519 * sync of the native queue. The method should wait until native
1520 * requests are processed, all native events are processed and
1521 * corresponding Java events are generated. Should return
1522 * <code>true</code> if some events were processed,
1523 * <code>false</code> otherwise.
1524 */
1525 protected abstract boolean syncNativeQueue(final long timeout);
1526
1527 private boolean eventDispatched = false;
1528 private boolean queueEmpty = false;
1529 private final Object waitLock = "Wait Lock";
1530
1531 private boolean isEQEmpty() {
1532 EventQueue queue = getSystemEventQueueImpl();
1533 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1534 }
1535
1536 /**
1537 * Waits for the Java event queue to empty. Ensures that all
1538 * events are processed (including paint events), and that if
1539 * recursive events were generated, they are also processed.
1540 * Should return <code>true</code> if more processing is
1541 * necessary, <code>false</code> otherwise.
1542 */
1543 @SuppressWarnings("serial")
1544 protected final boolean waitForIdle(final long timeout) {
1545 flushPendingEvents();
1546 boolean queueWasEmpty = isEQEmpty();
1547 queueEmpty = false;
1548 eventDispatched = false;
1549 synchronized(waitLock) {
1550 postEvent(AppContext.getAppContext(),
1551 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1552 @Override
1553 public void dispatch() {
1554 // Here we block EDT. It could have some
1555 // events, it should have dispatched them by
1556 // now. So native requests could have been
1557 // generated. First, dispatch them. Then,
1558 // flush Java events again.
1559 int iters = 0;
1560 while (iters < MIN_ITERS) {
1561 syncNativeQueue(timeout);
1562 iters++;
1563 }
1564 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1565 iters++;
1566 }
1567 flushPendingEvents();
1568
1569 synchronized(waitLock) {
1570 queueEmpty = isEQEmpty();
1571 eventDispatched = true;
1572 waitLock.notifyAll();
1573 }
1574 }
1575 });
1576 try {
1577 while (!eventDispatched) {
1578 waitLock.wait();
1579 }
1580 } catch (InterruptedException ie) {
1581 return false;
1582 }
1583 }
1584
1585 try {
1586 Thread.sleep(MINIMAL_EDELAY);
1587 } catch (InterruptedException ie) {
1588 throw new RuntimeException("Interrupted");
1589 }
1590
1591 flushPendingEvents();
1592
1593 // Lock to force write-cache flush for queueEmpty.
1594 synchronized (waitLock) {
1595 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1596 }
1597 }
1598
1599 /**
1600 * Grabs the mouse input for the given window. The window must be
1601 * visible. The window or its children do not receive any
1602 * additional mouse events besides those targeted to them. All
1603 * other events will be dispatched as before - to the respective
1604 * targets. This Window will receive UngrabEvent when automatic
1605 * ungrab is about to happen. The event can be listened to by
1606 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1607 * UngrabEvent class for the list of conditions when ungrab is
1608 * about to happen.
1609 * @see UngrabEvent
1610 */
1611 public abstract void grab(Window w);
1612
1613 /**
1614 * Forces ungrab. No event will be sent.
1615 */
1616 public abstract void ungrab(Window w);
1617
1618
1619 /**
1620 * Locates the splash screen library in a platform dependent way and closes
1621 * the splash screen. Should be invoked on first top-level frame display.
1622 * @see java.awt.SplashScreen
1623 * @since 1.6
1624 */
1625 public static native void closeSplashScreen();
1626
1627 /* The following methods and variables are to support retrieving
1628 * desktop text anti-aliasing settings
1629 */
1630
1631 /* Need an instance method because setDesktopProperty(..) is protected. */
1632 private void fireDesktopFontPropertyChanges() {
1633 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1634 SunToolkit.getDesktopFontHints());
1635 }
1636
1637 private static boolean checkedSystemAAFontSettings;
1638 private static boolean useSystemAAFontSettings;
1639 private static boolean lastExtraCondition = true;
1640 private static RenderingHints desktopFontHints;
1641
1642 /* Since Swing is the reason for this "extra condition" logic its
1643 * worth documenting it in some detail.
1644 * First, a goal is for Swing and applications to both retrieve and
1645 * use the same desktop property value so that there is complete
1646 * consistency between the settings used by JDK's Swing implementation
1647 * and 3rd party custom Swing components, custom L&Fs and any general
1648 * text rendering that wants to be consistent with these.
1649 * But by default on Solaris & Linux Swing will not use AA text over
1650 * remote X11 display (unless Xrender can be used which is TBD and may not
1651 * always be available anyway) as that is a noticeable performance hit.
1652 * So there needs to be a way to express that extra condition so that
1653 * it is seen by all clients of the desktop property API.
1654 * If this were the only condition it could be handled here as it would
1655 * be the same for any L&F and could reasonably be considered to be
1656 * a static behaviour of those systems.
1657 * But GTK currently has an additional test based on locale which is
1658 * not applied by Metal. So mixing GTK in a few locales with Metal
1659 * would mean the last one wins.
1660 * This could be stored per-app context which would work
1661 * for different applets, but wouldn't help for a single application
1662 * using GTK and some other L&F concurrently.
1663 * But it is expected this will be addressed within GTK and the font
1664 * system so is a temporary and somewhat unlikely harmless corner case.
1665 */
1666 public static void setAAFontSettingsCondition(boolean extraCondition) {
1667 if (extraCondition != lastExtraCondition) {
1668 lastExtraCondition = extraCondition;
1669 if (checkedSystemAAFontSettings) {
1670 /* Someone already asked for this info, under a different
1671 * condition.
1672 * We'll force re-evaluation instead of replicating the
1673 * logic, then notify any listeners of any change.
1674 */
1675 checkedSystemAAFontSettings = false;
1676 Toolkit tk = Toolkit.getDefaultToolkit();
1677 if (tk instanceof SunToolkit) {
1678 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1679 }
1680 }
1681 }
1682 }
1683
1684 /* "false", "off", ""default" aren't explicitly tested, they
1685 * just fall through to produce a null return which all are equated to
1686 * "false".
1687 */
1688 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1689 Object aaHint = null;
1690 hintname = hintname.toLowerCase(Locale.ENGLISH);
1691 if (hintname.equals("on")) {
1692 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1693 } else if (hintname.equals("gasp")) {
1694 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1695 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1696 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1697 } else if (hintname.equals("lcd_hbgr")) {
1698 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1699 } else if (hintname.equals("lcd_vrgb")) {
1700 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1701 } else if (hintname.equals("lcd_vbgr")) {
1702 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1703 }
1704 if (aaHint != null) {
1705 RenderingHints map = new RenderingHints(null);
1706 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1707 return map;
1708 } else {
1709 return null;
1710 }
1711 }
1712
1713 /* This method determines whether to use the system font settings,
1714 * or ignore them if a L&F has specified they should be ignored, or
1715 * to override both of these with a system property specified value.
1716 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1717 * system property isn't applied as desktop properties are considered
1718 * to be inapplicable in that case. In that headless case although
1719 * this method will return "true" the toolkit will return a null map.
1720 */
1721 private static boolean useSystemAAFontSettings() {
1722 if (!checkedSystemAAFontSettings) {
1723 useSystemAAFontSettings = true; /* initially set this true */
1724 String systemAAFonts = null;
1725 Toolkit tk = Toolkit.getDefaultToolkit();
1726 if (tk instanceof SunToolkit) {
1727 systemAAFonts =
1728 AccessController.doPrivileged(
1729 new GetPropertyAction("awt.useSystemAAFontSettings"));
1730 }
1731 if (systemAAFonts != null) {
1732 useSystemAAFontSettings =
1733 Boolean.valueOf(systemAAFonts).booleanValue();
1734 /* If it is anything other than "true", then it may be
1735 * a hint name , or it may be "off, "default", etc.
1736 */
1737 if (!useSystemAAFontSettings) {
1738 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1739 }
1740 }
1741 /* If its still true, apply the extra condition */
1742 if (useSystemAAFontSettings) {
1743 useSystemAAFontSettings = lastExtraCondition;
1744 }
1745 checkedSystemAAFontSettings = true;
1746 }
1747 return useSystemAAFontSettings;
1748 }
1749
1750 /* A variable defined for the convenience of JDK code */
1751 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1752
1753 /* Overridden by subclasses to return platform/desktop specific values */
1754 protected RenderingHints getDesktopAAHints() {
1755 return null;
1756 }
1757
1758 /* Subclass desktop property loading methods call this which
1759 * in turn calls the appropriate subclass implementation of
1760 * getDesktopAAHints() when system settings are being used.
1761 * Its public rather than protected because subclasses may delegate
1762 * to a helper class.
1763 */
1764 public static RenderingHints getDesktopFontHints() {
1765 if (useSystemAAFontSettings()) {
1766 Toolkit tk = Toolkit.getDefaultToolkit();
1767 if (tk instanceof SunToolkit) {
1768 Object map = ((SunToolkit)tk).getDesktopAAHints();
1769 return (RenderingHints)map;
1770 } else { /* Headless Toolkit */
1771 return null;
1772 }
1773 } else if (desktopFontHints != null) {
1774 /* cloning not necessary as the return value is cloned later, but
1775 * its harmless.
1776 */
1777 return (RenderingHints)(desktopFontHints.clone());
1778 } else {
1779 return null;
1780 }
1781 }
1782
1783
1784 public abstract boolean isDesktopSupported();
1785
1786 /*
1787 * consumeNextKeyTyped() method is not currently used,
1788 * however Swing could use it in the future.
1789 */
1790 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1791 try {
1792 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1793 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1794 getCurrentKeyboardFocusManager(),
1795 keyEvent);
1796 } catch (ClassCastException cce) {
1797 cce.printStackTrace();
1798 }
1799 }
1800
1801 protected static void dumpPeers(final PlatformLogger aLog) {
1802 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1803 }
1804
1805 /**
1806 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1807 * @return Window ancestor of the component or component by itself if it is Window;
1808 * null, if component is not a part of window hierarchy
1809 */
1810 public static Window getContainingWindow(Component comp) {
1811 while (comp != null && !(comp instanceof Window)) {
1812 comp = comp.getParent();
1813 }
1814 return (Window)comp;
1815 }
1816
1817 private static Boolean sunAwtDisableMixing = null;
1818
1819 /**
1820 * Returns the value of "sun.awt.disableMixing" property. Default
1821 * value is {@code false}.
1822 */
1823 public synchronized static boolean getSunAwtDisableMixing() {
1824 if (sunAwtDisableMixing == null) {
1825 sunAwtDisableMixing = AccessController.doPrivileged(
1826 new GetBooleanAction("sun.awt.disableMixing"));
1827 }
1828 return sunAwtDisableMixing.booleanValue();
1829 }
1830
1831 /**
1832 * Returns true if the native GTK libraries are available. The
1833 * default implementation returns false, but UNIXToolkit overrides this
1834 * method to provide a more specific answer.
1835 */
1836 public boolean isNativeGTKAvailable() {
1837 return false;
1838 }
1839
1840 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1841
1842 public synchronized void setWindowDeactivationTime(Window w, long time) {
1843 AppContext ctx = getAppContext(w);
1844 if (ctx == null) {
1845 return;
1846 }
1847 @SuppressWarnings("unchecked")
1848 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1849 if (map == null) {
1850 map = new WeakHashMap<Window, Long>();
1851 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1852 }
1853 map.put(w, time);
1854 }
1855
1856 public synchronized long getWindowDeactivationTime(Window w) {
1857 AppContext ctx = getAppContext(w);
1858 if (ctx == null) {
1859 return -1;
1860 }
1861 @SuppressWarnings("unchecked")
1862 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1863 if (map == null) {
1864 return -1;
1865 }
1866 Long time = map.get(w);
1867 return time == null ? -1 : time;
1868 }
1869
1870 // Cosntant alpha
1871 public boolean isWindowOpacitySupported() {
1872 return false;
1873 }
1874
1875 // Shaping
1876 public boolean isWindowShapingSupported() {
1877 return false;
1878 }
1879
1880 // Per-pixel alpha
1881 public boolean isWindowTranslucencySupported() {
1882 return false;
1883 }
1884
1885 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1886 return false;
1887 }
1888
1889 /**
1890 * Returns true if swing backbuffer should be translucent.
1891 */
1892 public boolean isSwingBackbufferTranslucencySupported() {
1893 return false;
1894 }
1895
1896 /**
1897 * Returns whether or not a containing top level window for the passed
1898 * component is
1899 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1900 *
1901 * @param c a Component which toplevel's to check
1902 * @return {@code true} if the passed component is not null and has a
1903 * containing toplevel window which is opaque (so per-pixel translucency
1904 * is not enabled), {@code false} otherwise
1905 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1906 */
1907 public static boolean isContainingTopLevelOpaque(Component c) {
1908 Window w = getContainingWindow(c);
1909 return w != null && w.isOpaque();
1910 }
1911
1912 /**
1913 * Returns whether or not a containing top level window for the passed
1914 * component is
1915 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1916 *
1917 * @param c a Component which toplevel's to check
1918 * @return {@code true} if the passed component is not null and has a
1919 * containing toplevel window which has opacity less than
1920 * 1.0f (which means that it is translucent), {@code false} otherwise
1921 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1922 */
1923 public static boolean isContainingTopLevelTranslucent(Component c) {
1924 Window w = getContainingWindow(c);
1925 return w != null && w.getOpacity() < 1.0f;
1926 }
1927
1928 /**
1929 * Returns whether the native system requires using the peer.updateWindow()
1930 * method to update the contents of a non-opaque window, or if usual
1931 * painting procedures are sufficient. The default return value covers
1932 * the X11 systems. On MS Windows this method is overriden in WToolkit
1933 * to return true.
1934 */
1935 public boolean needUpdateWindow() {
1936 return false;
1937 }
1938
1939 /**
1940 * Descendants of the SunToolkit should override and put their own logic here.
1941 */
1942 public int getNumberOfButtons(){
1943 return 3;
1944 }
1945
1946 /**
1947 * Checks that the given object implements/extends the given
1948 * interface/class.
1949 *
1950 * Note that using the instanceof operator causes a class to be loaded.
1951 * Using this method doesn't load a class and it can be used instead of
1952 * the instanceof operator for performance reasons.
1953 *
1954 * @param obj Object to be checked
1955 * @param type The name of the interface/class. Must be
1956 * fully-qualified interface/class name.
1957 * @return true, if this object implements/extends the given
1958 * interface/class, false, otherwise, or if obj or type is null
1959 */
1960 public static boolean isInstanceOf(Object obj, String type) {
1961 if (obj == null) return false;
1962 if (type == null) return false;
1963
1964 return isInstanceOf(obj.getClass(), type);
1965 }
1966
1967 private static boolean isInstanceOf(Class<?> cls, String type) {
1968 if (cls == null) return false;
1969
1970 if (cls.getName().equals(type)) {
1971 return true;
1972 }
1973
1974 for (Class<?> c : cls.getInterfaces()) {
1975 if (c.getName().equals(type)) {
1976 return true;
1977 }
1978 }
1979 return isInstanceOf(cls.getSuperclass(), type);
1980 }
1981
1982 protected static LightweightFrame getLightweightFrame(Component c) {
1983 for (; c != null; c = c.getParent()) {
1984 if (c instanceof LightweightFrame) {
1985 return (LightweightFrame)c;
1986 }
1987 if (c instanceof Window) {
1988 // Don't traverse owner windows
1989 return null;
1990 }
1991 }
1992 return null;
1993 }
1994
1995 ///////////////////////////////////////////////////////////////////////////
1996 //
1997 // The following methods help set and identify whether a particular
1998 // AWTEvent object was produced by the system or by user code. As of this
1999 // writing the only consumer is the Java Plug-In, although this information
2000 // could be useful to more clients and probably should be formalized in
2001 // the public API.
2002 //
2003 ///////////////////////////////////////////////////////////////////////////
2004
2005 public static void setSystemGenerated(AWTEvent e) {
2006 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2007 }
2008
2009 public static boolean isSystemGenerated(AWTEvent e) {
2010 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2011 }
2012
2013 } // class SunToolkit
2014
2015
2016 /*
2017 * PostEventQueue is a Thread that runs in the same AppContext as the
2018 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2019 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2020 * events to this queue, which then calls EventQueue.postEvent().
2021 *
2022 * We do this because EventQueue.postEvent() may be overridden by client
2023 * code, and we mustn't ever call client code from the toolkit thread.
2024 */
2025 class PostEventQueue {
2026 private EventQueueItem queueHead = null;
2027 private EventQueueItem queueTail = null;
2028 private final EventQueue eventQueue;
2029
2030 private Thread flushThread = null;
2031
2032 PostEventQueue(EventQueue eq) {
2033 eventQueue = eq;
2034 }
2035
2036 /*
2037 * Continually post pending AWTEvents to the Java EventQueue. The method
2038 * is synchronized to ensure the flush is completed before a new event
2039 * can be posted to this queue.
2040 *
2041 * 7177040: The method couldn't be wholly synchronized because of calls
2042 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2043 * potentially lead to deadlock
2044 */
2045 public void flush() {
2046
2047 Thread newThread = Thread.currentThread();
2048
2049 try {
2050 EventQueueItem tempQueue;
2051 synchronized (this) {
2052 // Avoid method recursion
2053 if (newThread == flushThread) {
2054 return;
2055 }
2056 // Wait for other threads' flushing
2057 while (flushThread != null) {
2058 wait();
2059 }
2060 // Skip everything if queue is empty
2061 if (queueHead == null) {
2062 return;
2063 }
2064 // Remember flushing thread
2065 flushThread = newThread;
2066
2067 tempQueue = queueHead;
2068 queueHead = queueTail = null;
2069 }
2070 try {
2071 while (tempQueue != null) {
2072 eventQueue.postEvent(tempQueue.event);
2073 tempQueue = tempQueue.next;
2074 }
2075 }
2076 finally {
2077 // Only the flushing thread can get here
2078 synchronized (this) {
2079 // Forget flushing thread, inform other pending threads
2080 flushThread = null;
2081 notifyAll();
2082 }
2083 }
2084 }
2085 catch (InterruptedException e) {
2086 // Couldn't allow exception go up, so at least recover the flag
2087 newThread.interrupt();
2088 }
2089 }
2090
2091 /*
2092 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2093 */
2094 void postEvent(AWTEvent event) {
2095 EventQueueItem item = new EventQueueItem(event);
2096
2097 synchronized (this) {
2098 if (queueHead == null) {
2099 queueHead = queueTail = item;
2100 } else {
2101 queueTail.next = item;
2102 queueTail = item;
2103 }
2104 }
2105 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2106 }
2107 } // class PostEventQueue