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.ColorModel;
34 import java.awt.image.DataBuffer;
35 import java.awt.image.DataBufferInt;
36 import java.awt.image.ImageObserver;
37 import java.awt.image.ImageProducer;
38 import java.awt.image.Raster;
39 import java.awt.peer.FramePeer;
40 import java.awt.peer.KeyboardFocusManagerPeer;
41 import java.awt.peer.MouseInfoPeer;
42 import java.awt.peer.SystemTrayPeer;
43 import java.awt.peer.TrayIconPeer;
44 import java.io.File;
45 import java.io.IOException;
46 import java.io.InputStream;
47 import java.lang.reflect.InvocationTargetException;
48 import java.net.URL;
49 import java.security.AccessController;
50 import java.util.ArrayList;
51 import java.util.Collections;
52 import java.util.Iterator;
53 import java.util.Locale;
54 import java.util.Map;
55 import java.util.Vector;
56 import java.util.WeakHashMap;
57 import java.util.concurrent.TimeUnit;
58 import java.util.concurrent.locks.Condition;
59 import java.util.concurrent.locks.ReentrantLock;
60
61 import sun.awt.im.InputContext;
62 import sun.awt.image.ByteArrayImageSource;
63 import sun.awt.image.FileImageSource;
64 import sun.awt.image.ImageRepresentation;
65 import java.awt.image.MultiResolutionImage;
66 import sun.awt.image.MultiResolutionToolkitImage;
67 import sun.awt.image.ToolkitImage;
68 import sun.awt.image.URLImageSource;
69 import sun.font.FontDesignMetrics;
70 import sun.net.util.URLUtil;
71 import sun.security.action.GetBooleanAction;
72 import sun.security.action.GetPropertyAction;
73 import sun.util.logging.PlatformLogger;
74
75 import static java.awt.RenderingHints.*;
76
77 public abstract class SunToolkit extends Toolkit
78 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
79
80 // 8014718: logging has been removed from SunToolkit
81
82 /* Load debug settings for native code */
83 static {
84 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
85 DebugSettings.init();
86 }
87 };
88
89 /**
90 * Special mask for the UngrabEvent events, in addition to the
91 * public masks defined in AWTEvent. Should be used as the mask
92 * value for Toolkit.addAWTEventListener.
93 */
94 public static final int GRAB_EVENT_MASK = 0x80000000;
95
96 /* The key to put()/get() the PostEventQueue into/from the AppContext.
97 */
98 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
99
100 /**
101 * Number of buttons.
102 * By default it's taken from the system. If system value does not
103 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
104 */
105 protected static int numberOfButtons = 0;
106
107
108 /* XFree standard mention 24 buttons as maximum:
109 * http://www.xfree86.org/current/mouse.4.html
110 * We workaround systems supporting more than 24 buttons.
111 * Otherwise, we have to use long type values as masks
112 * which leads to API change.
113 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
114 * the 4-bytes limit for the int type. (CR 6799099)
115 * One more bit is reserved for FIRST_HIGH_BIT.
116 */
117 public static final int MAX_BUTTONS_SUPPORTED = 20;
118
119 /**
120 * Creates and initializes EventQueue instance for the specified
121 * AppContext.
122 * Note that event queue must be created from createNewAppContext()
123 * only in order to ensure that EventQueue constructor obtains
124 * the correct AppContext.
125 * @param appContext AppContext to associate with the event queue
126 */
127 private static void initEQ(AppContext appContext) {
128 EventQueue eventQueue = new EventQueue();
129 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
130
131 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
132 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
133 }
134
135 public SunToolkit() {
136 }
137
138 public boolean useBufferPerWindow() {
139 return false;
140 }
141
142 public abstract FramePeer createLightweightFrame(LightweightFrame target)
143 throws HeadlessException;
144
145 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
146 throws HeadlessException, AWTException;
147
148 public abstract SystemTrayPeer createSystemTray(SystemTray target);
149
150 public abstract boolean isTraySupported();
151
152 @Override
153 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
154 throws HeadlessException;
155
156 /**
157 * The AWT lock is typically only used on Unix platforms to synchronize
158 * access to Xlib, OpenGL, etc. However, these methods are implemented
159 * in SunToolkit so that they can be called from shared code (e.g.
160 * from the OGL pipeline) or from the X11 pipeline regardless of whether
161 * XToolkit or MToolkit is currently in use. There are native macros
162 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
163 * methods is changed, make sure it is compatible with the native macros.
164 *
165 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
166 * used in place of:
167 * synchronized (getAWTLock()) {
168 * ...
169 * }
170 *
171 * By factoring these methods out specially, we are able to change the
172 * implementation of these methods (e.g. use more advanced locking
173 * mechanisms) without impacting calling code.
174 *
175 * Sample usage:
176 * private void doStuffWithXlib() {
177 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
178 * SunToolkit.awtLock();
179 * try {
180 * ...
181 * XlibWrapper.XDoStuff();
182 * } finally {
183 * SunToolkit.awtUnlock();
184 * }
185 * }
186 */
187
188 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
189 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
190
191 public static final void awtLock() {
192 AWT_LOCK.lock();
193 }
194
195 public static final boolean awtTryLock() {
196 return AWT_LOCK.tryLock();
197 }
198
199 public static final void awtUnlock() {
200 AWT_LOCK.unlock();
201 }
202
203 public static final void awtLockWait()
204 throws InterruptedException
205 {
206 AWT_LOCK_COND.await();
207 }
208
209 public static final void awtLockWait(long timeout)
210 throws InterruptedException
211 {
212 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
213 }
214
215 public static final void awtLockNotify() {
216 AWT_LOCK_COND.signal();
217 }
218
219 public static final void awtLockNotifyAll() {
220 AWT_LOCK_COND.signalAll();
221 }
222
223 public static final boolean isAWTLockHeldByCurrentThread() {
224 return AWT_LOCK.isHeldByCurrentThread();
225 }
226
227 /*
228 * Create a new AppContext, along with its EventQueue, for a
229 * new ThreadGroup. Browser code, for example, would use this
230 * method to create an AppContext & EventQueue for an Applet.
231 */
232 public static AppContext createNewAppContext() {
233 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
234 return createNewAppContext(threadGroup);
235 }
236
237 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
238 // Create appContext before initialization of EventQueue, so all
239 // the calls to AppContext.getAppContext() from EventQueue ctor
240 // return correct values
241 AppContext appContext = new AppContext(threadGroup);
242 initEQ(appContext);
243
244 return appContext;
245 }
246
247 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
248 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
249 }
250
251 /*
252 * Fetch the peer associated with the given target (as specified
253 * in the peer creation method). This can be used to determine
254 * things like what the parent peer is. If the target is null
255 * or the target can't be found (either because the a peer was
256 * never created for it or the peer was disposed), a null will
257 * be returned.
258 */
259 protected static Object targetToPeer(Object target) {
260 if (target != null && !GraphicsEnvironment.isHeadless()) {
261 return AWTAutoShutdown.getInstance().getPeer(target);
262 }
263 return null;
264 }
265
266 protected static void targetCreatedPeer(Object target, Object peer) {
267 if (target != null && peer != null &&
268 !GraphicsEnvironment.isHeadless())
269 {
270 AWTAutoShutdown.getInstance().registerPeer(target, peer);
271 }
272 }
273
274 protected static void targetDisposedPeer(Object target, Object peer) {
275 if (target != null && peer != null &&
276 !GraphicsEnvironment.isHeadless())
277 {
278 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
279 }
280 }
281
282 // Maps from non-Component/MenuComponent to AppContext.
283 // WeakHashMap<Component,AppContext>
284 private static final Map<Object, AppContext> appContextMap =
285 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>());
286
287 /**
288 * Sets the appContext field of target. If target is not a Component or
289 * MenuComponent, this returns false.
290 */
291 private static boolean setAppContext(Object target,
292 AppContext context) {
293 if (target instanceof Component) {
294 AWTAccessor.getComponentAccessor().
295 setAppContext((Component)target, context);
296 } else if (target instanceof MenuComponent) {
297 AWTAccessor.getMenuComponentAccessor().
298 setAppContext((MenuComponent)target, context);
299 } else {
300 return false;
301 }
302 return true;
303 }
304
305 /**
306 * Returns the appContext field for target. If target is not a
307 * Component or MenuComponent this returns null.
308 */
309 private static AppContext getAppContext(Object target) {
310 if (target instanceof Component) {
311 return AWTAccessor.getComponentAccessor().
312 getAppContext((Component)target);
313 } else if (target instanceof MenuComponent) {
314 return AWTAccessor.getMenuComponentAccessor().
315 getAppContext((MenuComponent)target);
316 } else {
317 return null;
318 }
319 }
320
321 /*
322 * Fetch the AppContext associated with the given target.
323 * This can be used to determine things like which EventQueue
324 * to use for posting events to a Component. If the target is
325 * null or the target can't be found, a null with be returned.
326 */
327 public static AppContext targetToAppContext(Object target) {
328 if (target == null) {
329 return null;
330 }
331 AppContext context = getAppContext(target);
332 if (context == null) {
333 // target is not a Component/MenuComponent, try the
334 // appContextMap.
335 context = appContextMap.get(target);
336 }
337 return context;
338 }
339
340 /**
341 * Sets the synchronous status of focus requests on lightweight
342 * components in the specified window to the specified value.
343 * If the boolean parameter is {@code true} then the focus
344 * requests on lightweight components will be performed
345 * synchronously, if it is {@code false}, then asynchronously.
346 * By default, all windows have their lightweight request status
347 * set to asynchronous.
348 * <p>
349 * The application can only set the status of lightweight focus
350 * requests to synchronous for any of its windows if it doesn't
351 * perform focus transfers between different heavyweight containers.
352 * In this case the observable focus behaviour is the same as with
353 * asynchronous status.
354 * <p>
355 * If the application performs focus transfer between different
356 * heavyweight containers and sets the lightweight focus request
357 * status to synchronous for any of its windows, then further focus
358 * behaviour is unspecified.
359 * <p>
360 * @param changed the window for which the lightweight focus request
361 * status should be set
362 * @param status the value of lightweight focus request status
363 */
364
365 public static void setLWRequestStatus(Window changed,boolean status){
366 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
367 };
368
369 public static void checkAndSetPolicy(Container cont) {
370 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
371 getCurrentKeyboardFocusManager().
372 getDefaultFocusTraversalPolicy();
373
374 cont.setFocusTraversalPolicy(defaultPolicy);
375 }
376
377 /*
378 * Insert a mapping from target to AppContext, for later retrieval
379 * via targetToAppContext() above.
380 */
381 public static void insertTargetMapping(Object target, AppContext appContext) {
382 if (!setAppContext(target, appContext)) {
383 // Target is not a Component/MenuComponent, use the private Map
384 // instead.
385 appContextMap.put(target, appContext);
386 }
387 }
388
389 /*
390 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
391 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
392 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
393 * not be called under another lock since it locks the EventQueue.
394 * See bugids 4632918, 4526597.
395 */
396 public static void postEvent(AppContext appContext, AWTEvent event) {
397 if (event == null) {
398 throw new NullPointerException();
399 }
400
401 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
402 if (sea != null && sea.isSequencedEvent(event)) {
403 AWTEvent nested = sea.getNested(event);
404 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
405 nested instanceof TimedWindowEvent)
406 {
407 TimedWindowEvent twe = (TimedWindowEvent)nested;
408 ((SunToolkit)Toolkit.getDefaultToolkit()).
409 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
410 }
411 }
412
413 // All events posted via this method are system-generated.
414 // Placing the following call here reduces considerably the
415 // number of places throughout the toolkit that would
416 // otherwise have to be modified to precisely identify
417 // system-generated events.
418 setSystemGenerated(event);
419 AppContext eventContext = targetToAppContext(event.getSource());
420 if (eventContext != null && !eventContext.equals(appContext)) {
421 throw new RuntimeException("Event posted on wrong app context : " + event);
422 }
423 PostEventQueue postEventQueue =
424 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
425 if (postEventQueue != null) {
426 postEventQueue.postEvent(event);
427 }
428 }
429
430 /*
431 * Post AWTEvent of high priority.
432 */
433 public static void postPriorityEvent(final AWTEvent e) {
434 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
435 @Override
436 public void run() {
437 AWTAccessor.getAWTEventAccessor().setPosted(e);
438 ((Component)e.getSource()).dispatchEvent(e);
439 }
440 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
441 postEvent(targetToAppContext(e.getSource()), pe);
442 }
443
444 /*
445 * Flush any pending events which haven't been posted to the AWT
446 * EventQueue yet.
447 */
448 public static void flushPendingEvents() {
449 AppContext appContext = AppContext.getAppContext();
450 flushPendingEvents(appContext);
451 }
452
453 /*
454 * Flush the PostEventQueue for the right AppContext.
455 * The default flushPendingEvents only flushes the thread-local context,
456 * which is not always correct, c.f. 3746956
457 */
458 public static void flushPendingEvents(AppContext appContext) {
459 PostEventQueue postEventQueue =
460 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
461 if (postEventQueue != null) {
462 postEventQueue.flush();
463 }
464 }
465
466 /*
467 * Execute a chunk of code on the Java event handler thread for the
468 * given target. Does not wait for the execution to occur before
469 * returning to the caller.
470 */
471 public static void executeOnEventHandlerThread(Object target,
472 Runnable runnable) {
473 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
474 }
475
476 /*
477 * Fixed 5064013: the InvocationEvent time should be equals
478 * the time of the ActionEvent
479 */
480 @SuppressWarnings("serial")
481 public static void executeOnEventHandlerThread(Object target,
482 Runnable runnable,
483 final long when) {
484 executeOnEventHandlerThread(
485 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
486 @Override
487 public long getWhen() {
488 return when;
489 }
490 });
491 }
492
493 /*
494 * Execute a chunk of code on the Java event handler thread for the
495 * given target. Does not wait for the execution to occur before
496 * returning to the caller.
497 */
498 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
499 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
500 }
501
502 /*
503 * Execute a chunk of code on the Java event handler thread. The
504 * method takes into account provided AppContext and sets
505 * {@code SunToolkit.getDefaultToolkit()} as a target of the
506 * event. See 6451487 for detailes.
507 * Does not wait for the execution to occur before returning to
508 * the caller.
509 */
510 public static void invokeLaterOnAppContext(
511 AppContext appContext, Runnable dispatcher)
512 {
513 postEvent(appContext,
514 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
515 PeerEvent.PRIORITY_EVENT));
516 }
517
518 /*
519 * Execute a chunk of code on the Java event handler thread for the
520 * given target. Waits for the execution to occur before returning
521 * to the caller.
522 */
523 public static void executeOnEDTAndWait(Object target, Runnable runnable)
524 throws InterruptedException, InvocationTargetException
525 {
526 if (EventQueue.isDispatchThread()) {
527 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
528 }
529
530 class AWTInvocationLock {}
531 Object lock = new AWTInvocationLock();
532
533 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
534
535 synchronized (lock) {
536 executeOnEventHandlerThread(event);
537 while(!event.isDispatched()) {
538 lock.wait();
539 }
540 }
541
542 Throwable eventThrowable = event.getThrowable();
543 if (eventThrowable != null) {
544 throw new InvocationTargetException(eventThrowable);
545 }
546 }
547
548 /*
549 * Returns true if the calling thread is the event dispatch thread
550 * contained within AppContext which associated with the given target.
551 * Use this call to ensure that a given task is being executed
552 * (or not being) on the event dispatch thread for the given target.
553 */
554 public static boolean isDispatchThreadForAppContext(Object target) {
555 AppContext appContext = targetToAppContext(target);
556 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
557
558 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
559 return accessor.isDispatchThreadImpl(eq);
560 }
561
562 @Override
563 public Dimension getScreenSize() {
564 return GraphicsEnvironment.getLocalGraphicsEnvironment()
565 .getDefaultScreenDevice().getDefaultConfiguration()
566 .getBounds().getSize();
567 }
568
569 @Override
570 public ColorModel getColorModel() throws HeadlessException {
571 return GraphicsEnvironment.getLocalGraphicsEnvironment()
572 .getDefaultScreenDevice().getDefaultConfiguration()
573 .getColorModel();
574 }
575
576 @Override
577 @SuppressWarnings("deprecation")
578 public FontMetrics getFontMetrics(Font font) {
579 return FontDesignMetrics.getMetrics(font);
580 }
581
582 @Override
583 @SuppressWarnings("deprecation")
584 public String[] getFontList() {
585 String[] hardwiredFontList = {
586 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
587 Font.DIALOG_INPUT
588
589 // -- Obsolete font names from 1.0.2. It was decided that
590 // -- getFontList should not return these old names:
591 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
592 };
593 return hardwiredFontList;
594 }
595
596 /**
597 * Disables erasing of background on the canvas before painting if
598 * this is supported by the current toolkit. It is recommended to
599 * call this method early, before the Canvas becomes displayable,
600 * because some Toolkit implementations do not support changing
601 * this property once the Canvas becomes displayable.
602 */
603 public void disableBackgroundErase(Canvas canvas) {
604 disableBackgroundEraseImpl(canvas);
605 }
606
607 /**
608 * Disables the native erasing of the background on the given
609 * component before painting if this is supported by the current
610 * toolkit. This only has an effect for certain components such as
611 * Canvas, Panel and Window. It is recommended to call this method
612 * early, before the Component becomes displayable, because some
613 * Toolkit implementations do not support changing this property
614 * once the Component becomes displayable.
615 */
616 public void disableBackgroundErase(Component component) {
617 disableBackgroundEraseImpl(component);
618 }
619
620 private void disableBackgroundEraseImpl(Component component) {
621 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
622 }
623
624 /**
625 * Returns the value of "sun.awt.noerasebackground" property. Default
626 * value is {@code false}.
627 */
628 public static boolean getSunAwtNoerasebackground() {
629 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
630 }
631
632 /**
633 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
634 * value is {@code false}.
635 */
636 public static boolean getSunAwtErasebackgroundonresize() {
637 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
638 }
639
640
641 @SuppressWarnings("deprecation")
642 static final SoftCache fileImgCache = new SoftCache();
643
644 @SuppressWarnings("deprecation")
645 static final SoftCache urlImgCache = new SoftCache();
646
647 static Image getImageFromHash(Toolkit tk, URL url) {
648 checkPermissions(url);
649 synchronized (urlImgCache) {
650 String key = url.toString();
651 Image img = (Image)urlImgCache.get(key);
652 if (img == null) {
653 try {
654 img = tk.createImage(new URLImageSource(url));
655 urlImgCache.put(key, img);
656 } catch (Exception e) {
657 }
658 }
659 return img;
660 }
661 }
662
663 static Image getImageFromHash(Toolkit tk,
664 String filename) {
665 checkPermissions(filename);
666 synchronized (fileImgCache) {
667 Image img = (Image)fileImgCache.get(filename);
668 if (img == null) {
669 try {
670 img = tk.createImage(new FileImageSource(filename));
671 fileImgCache.put(filename, img);
672 } catch (Exception e) {
673 }
674 }
675 return img;
676 }
677 }
678
679 @Override
680 public Image getImage(String filename) {
681 return getImageFromHash(this, filename);
682 }
683
684 @Override
685 public Image getImage(URL url) {
686 return getImageFromHash(this, url);
687 }
688
689 protected Image getImageWithResolutionVariant(String fileName,
690 String resolutionVariantName) {
691 synchronized (fileImgCache) {
692 Image image = getImageFromHash(this, fileName);
693 if (image instanceof MultiResolutionImage) {
694 return image;
695 }
696 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
697 image = createImageWithResolutionVariant(image, resolutionVariant);
698 fileImgCache.put(fileName, image);
699 return image;
700 }
701 }
702
703 protected Image getImageWithResolutionVariant(URL url,
704 URL resolutionVariantURL) {
705 synchronized (urlImgCache) {
706 Image image = getImageFromHash(this, url);
707 if (image instanceof MultiResolutionImage) {
708 return image;
709 }
710 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
711 image = createImageWithResolutionVariant(image, resolutionVariant);
712 String key = url.toString();
713 urlImgCache.put(key, image);
714 return image;
715 }
716 }
717
718
719 @Override
720 public Image createImage(String filename) {
721 checkPermissions(filename);
722 return createImage(new FileImageSource(filename));
723 }
724
725 @Override
726 public Image createImage(URL url) {
727 checkPermissions(url);
728 return createImage(new URLImageSource(url));
729 }
730
731 @Override
732 public Image createImage(byte[] data, int offset, int length) {
733 return createImage(new ByteArrayImageSource(data, offset, length));
734 }
735
736 @Override
737 public Image createImage(ImageProducer producer) {
738 return new ToolkitImage(producer);
739 }
740
741 public static Image createImageWithResolutionVariant(Image image,
742 Image resolutionVariant) {
743 return new MultiResolutionToolkitImage(image, resolutionVariant);
744 }
745
746 @Override
747 public int checkImage(Image img, int w, int h, ImageObserver o) {
748 if (!(img instanceof ToolkitImage)) {
749 return ImageObserver.ALLBITS;
750 }
751
752 ToolkitImage tkimg = (ToolkitImage)img;
753 int repbits;
754 if (w == 0 || h == 0) {
755 repbits = ImageObserver.ALLBITS;
756 } else {
757 repbits = tkimg.getImageRep().check(o);
758 }
759 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
760 }
761
762 @Override
763 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
764 if (w == 0 || h == 0) {
765 return true;
766 }
767
768 // Must be a ToolkitImage
769 if (!(img instanceof ToolkitImage)) {
770 return true;
771 }
772
773 ToolkitImage tkimg = (ToolkitImage)img;
774 if (tkimg.hasError()) {
775 if (o != null) {
776 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
777 -1, -1, -1, -1);
778 }
779 return false;
780 }
781 ImageRepresentation ir = tkimg.getImageRep();
782 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
783 }
784
785 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
786 ToolkitImage rvImage = getResolutionVariant(img);
787 int rvw = getRVSize(w);
788 int rvh = getRVSize(h);
789 // Ignore the resolution variant in case of error
790 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
791 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
792 getResolutionVariantObserver(
793 img, o, w, h, rvw, rvh, true));
794 }
795
796 private boolean prepareResolutionVariant(Image img, int w, int h,
797 ImageObserver o) {
798
799 ToolkitImage rvImage = getResolutionVariant(img);
800 int rvw = getRVSize(w);
801 int rvh = getRVSize(h);
802 // Ignore the resolution variant in case of error
803 return rvImage == null || rvImage.hasError() || prepareImage(
804 rvImage, rvw, rvh,
805 MultiResolutionToolkitImage.getResolutionVariantObserver(
806 img, o, w, h, rvw, rvh, true));
807 }
808
809 private static int getRVSize(int size){
810 return size == -1 ? -1 : 2 * size;
811 }
812
813 private static ToolkitImage getResolutionVariant(Image image) {
814 if (image instanceof MultiResolutionToolkitImage) {
815 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
816 getResolutionVariant();
817 if (resolutionVariant instanceof ToolkitImage) {
818 return (ToolkitImage) resolutionVariant;
819 }
820 }
821 return null;
822 }
823
824 protected static boolean imageCached(String fileName) {
825 return fileImgCache.containsKey(fileName);
826 }
827
828 protected static boolean imageCached(URL url) {
829 String key = url.toString();
830 return urlImgCache.containsKey(key);
831 }
832
833 protected static boolean imageExists(String filename) {
834 if (filename != null) {
835 checkPermissions(filename);
836 return new File(filename).exists();
837 }
838 return false;
839 }
840
841 @SuppressWarnings("try")
842 protected static boolean imageExists(URL url) {
843 if (url != null) {
844 checkPermissions(url);
845 try (InputStream is = url.openStream()) {
846 return true;
847 }catch(IOException e){
848 return false;
849 }
850 }
851 return false;
852 }
853
854 private static void checkPermissions(String filename) {
855 SecurityManager security = System.getSecurityManager();
856 if (security != null) {
857 security.checkRead(filename);
858 }
859 }
860
861 private static void checkPermissions(URL url) {
862 SecurityManager sm = System.getSecurityManager();
863 if (sm != null) {
864 try {
865 java.security.Permission perm =
866 URLUtil.getConnectPermission(url);
867 if (perm != null) {
868 try {
869 sm.checkPermission(perm);
870 } catch (SecurityException se) {
871 // fallback to checkRead/checkConnect for pre 1.2
872 // security managers
873 if ((perm instanceof java.io.FilePermission) &&
874 perm.getActions().indexOf("read") != -1) {
875 sm.checkRead(perm.getName());
876 } else if ((perm instanceof
877 java.net.SocketPermission) &&
878 perm.getActions().indexOf("connect") != -1) {
879 sm.checkConnect(url.getHost(), url.getPort());
880 } else {
881 throw se;
882 }
883 }
884 }
885 } catch (java.io.IOException ioe) {
886 sm.checkConnect(url.getHost(), url.getPort());
887 }
888 }
889 }
890
891 /**
892 * Scans {@code imageList} for best-looking image of specified dimensions.
893 * Image can be scaled and/or padded with transparency.
894 */
895 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
896 if (width == 0 || height == 0) {
897 return null;
898 }
899 java.util.List<Image> multiResAndnormalImages = new ArrayList<>(imageList.size());
900 for (Image image : imageList) {
901 if ((image instanceof MultiResolutionImage)) {
902 Image im = ((MultiResolutionImage) image).getResolutionVariant(width, height);
903 multiResAndnormalImages.add(im);
904 } else {
905 multiResAndnormalImages.add(image);
906 }
907 }
908 Image bestImage = null;
909 int bestWidth = 0;
910 int bestHeight = 0;
911 double bestSimilarity = 3; //Impossibly high value
912 double bestScaleFactor = 0;
913 for (Iterator<Image> i = multiResAndnormalImages.iterator();i.hasNext();) {
914 //Iterate imageList looking for best matching image.
915 //'Similarity' measure is defined as good scale factor and small insets.
916 //best possible similarity is 0 (no scale, no insets).
917 //It's found while the experiments that good-looking result is achieved
918 //with scale factors x1, x3/4, x2/3, xN, x1/N.
919 Image im = i.next();
920 if (im == null) {
921 continue;
922 }
923 if (im instanceof ToolkitImage) {
924 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
925 ir.reconstruct(ImageObserver.ALLBITS);
926 }
927 int iw;
928 int ih;
929 try {
930 iw = im.getWidth(null);
931 ih = im.getHeight(null);
932 } catch (Exception e){
933 continue;
934 }
935 if (iw > 0 && ih > 0) {
936 //Calc scale factor
937 double scaleFactor = Math.min((double)width / (double)iw,
938 (double)height / (double)ih);
939 //Calculate scaled image dimensions
940 //adjusting scale factor to nearest "good" value
941 int adjw = 0;
942 int adjh = 0;
943 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
944 if (scaleFactor >= 2) {
945 //Need to enlarge image more than twice
946 //Round down scale factor to multiply by integer value
947 scaleFactor = Math.floor(scaleFactor);
948 adjw = iw * (int)scaleFactor;
949 adjh = ih * (int)scaleFactor;
950 scaleMeasure = 1.0 - 0.5 / scaleFactor;
951 } else if (scaleFactor >= 1) {
952 //Don't scale
953 scaleFactor = 1.0;
954 adjw = iw;
955 adjh = ih;
956 scaleMeasure = 0;
957 } else if (scaleFactor >= 0.75) {
958 //Multiply by 3/4
959 scaleFactor = 0.75;
960 adjw = iw * 3 / 4;
961 adjh = ih * 3 / 4;
962 scaleMeasure = 0.3;
963 } else if (scaleFactor >= 0.6666) {
964 //Multiply by 2/3
965 scaleFactor = 0.6666;
966 adjw = iw * 2 / 3;
967 adjh = ih * 2 / 3;
968 scaleMeasure = 0.33;
969 } else {
970 //Multiply size by 1/scaleDivider
971 //where scaleDivider is minimum possible integer
972 //larger than 1/scaleFactor
973 double scaleDivider = Math.ceil(1.0 / scaleFactor);
974 scaleFactor = 1.0 / scaleDivider;
975 adjw = (int)Math.round((double)iw / scaleDivider);
976 adjh = (int)Math.round((double)ih / scaleDivider);
977 scaleMeasure = 1.0 - 1.0 / scaleDivider;
978 }
979 double similarity = ((double)width - (double)adjw) / (double)width +
980 ((double)height - (double)adjh) / (double)height + //Large padding is bad
981 scaleMeasure; //Large rescale is bad
982 if (similarity < bestSimilarity) {
983 bestSimilarity = similarity;
984 bestScaleFactor = scaleFactor;
985 bestImage = im;
986 bestWidth = adjw;
987 bestHeight = adjh;
988 }
989 if (similarity == 0) break;
990 }
991 }
992 if (bestImage == null) {
993 //No images were found, possibly all are broken
994 return null;
995 }
996 BufferedImage bimage =
997 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
998 Graphics2D g = bimage.createGraphics();
999 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1000 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1001 try {
1002 int x = (width - bestWidth) / 2;
1003 int y = (height - bestHeight) / 2;
1004 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1005 } finally {
1006 g.dispose();
1007 }
1008 return bimage;
1009 }
1010
1011 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1012 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1013 if (bimage == null) {
1014 return null;
1015 }
1016 Raster raster = bimage.getRaster();
1017 DataBuffer buffer = raster.getDataBuffer();
1018 return (DataBufferInt)buffer;
1019 }
1020
1021 @Override
1022 protected EventQueue getSystemEventQueueImpl() {
1023 return getSystemEventQueueImplPP();
1024 }
1025
1026 // Package private implementation
1027 static EventQueue getSystemEventQueueImplPP() {
1028 return getSystemEventQueueImplPP(AppContext.getAppContext());
1029 }
1030
1031 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1032 EventQueue theEventQueue =
1033 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1034 return theEventQueue;
1035 }
1036
1037 /**
1038 * Give native peers the ability to query the native container
1039 * given a native component (eg the direct parent may be lightweight).
1040 */
1041 public static Container getNativeContainer(Component c) {
1042 return Toolkit.getNativeContainer(c);
1043 }
1044
1045 /**
1046 * Gives native peers the ability to query the closest HW component.
1047 * If the given component is heavyweight, then it returns this. Otherwise,
1048 * it goes one level up in the hierarchy and tests next component.
1049 */
1050 public static Component getHeavyweightComponent(Component c) {
1051 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1052 c = AWTAccessor.getComponentAccessor().getParent(c);
1053 }
1054 return c;
1055 }
1056
1057 /**
1058 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1059 */
1060 @SuppressWarnings("deprecation")
1061 public int getFocusAcceleratorKeyMask() {
1062 return InputEvent.ALT_MASK;
1063 }
1064
1065 /**
1066 * Tests whether specified key modifiers mask can be used to enter a printable
1067 * character. This is a default implementation of this method, which reflects
1068 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1069 * characters from the extended character set (like euro sign or math symbols)
1070 */
1071 @SuppressWarnings("deprecation")
1072 public boolean isPrintableCharacterModifiersMask(int mods) {
1073 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1074 }
1075
1076 /**
1077 * Returns whether popup is allowed to be shown above the task bar.
1078 * This is a default implementation of this method, which checks
1079 * corresponding security permission.
1080 */
1081 public boolean canPopupOverlapTaskBar() {
1082 boolean result = true;
1083 try {
1084 SecurityManager sm = System.getSecurityManager();
1085 if (sm != null) {
1086 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1087 }
1088 } catch (SecurityException se) {
1089 // There is no permission to show popups over the task bar
1090 result = false;
1091 }
1092 return result;
1093 }
1094
1095 /**
1096 * Returns a new input method window, with behavior as specified in
1097 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1098 * If the inputContext is not null, the window should return it from its
1099 * getInputContext() method. The window needs to implement
1100 * sun.awt.im.InputMethodWindow.
1101 * <p>
1102 * SunToolkit subclasses can override this method to return better input
1103 * method windows.
1104 */
1105 @Override
1106 public Window createInputMethodWindow(String title, InputContext context) {
1107 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1108 }
1109
1110 /**
1111 * Returns whether enableInputMethods should be set to true for peered
1112 * TextComponent instances on this platform. False by default.
1113 */
1114 @Override
1115 public boolean enableInputMethodsForTextComponent() {
1116 return false;
1117 }
1118
1119 private static Locale startupLocale = null;
1120
1121 /**
1122 * Returns the locale in which the runtime was started.
1123 */
1124 public static Locale getStartupLocale() {
1125 if (startupLocale == null) {
1126 String language, region, country, variant;
1127 language = AccessController.doPrivileged(
1128 new GetPropertyAction("user.language", "en"));
1129 // for compatibility, check for old user.region property
1130 region = AccessController.doPrivileged(
1131 new GetPropertyAction("user.region"));
1132 if (region != null) {
1133 // region can be of form country, country_variant, or _variant
1134 int i = region.indexOf('_');
1135 if (i >= 0) {
1136 country = region.substring(0, i);
1137 variant = region.substring(i + 1);
1138 } else {
1139 country = region;
1140 variant = "";
1141 }
1142 } else {
1143 country = AccessController.doPrivileged(
1144 new GetPropertyAction("user.country", ""));
1145 variant = AccessController.doPrivileged(
1146 new GetPropertyAction("user.variant", ""));
1147 }
1148 startupLocale = new Locale(language, country, variant);
1149 }
1150 return startupLocale;
1151 }
1152
1153 /**
1154 * Returns the default keyboard locale of the underlying operating system
1155 */
1156 @Override
1157 public Locale getDefaultKeyboardLocale() {
1158 return getStartupLocale();
1159 }
1160
1161 /**
1162 * Returns whether default toolkit needs the support of the xembed
1163 * from embedding host(if any).
1164 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1165 */
1166 public static boolean needsXEmbed() {
1167 String noxembed = AccessController.
1168 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1169 if ("true".equals(noxembed)) {
1170 return false;
1171 }
1172
1173 Toolkit tk = Toolkit.getDefaultToolkit();
1174 if (tk instanceof SunToolkit) {
1175 // SunToolkit descendants should override this method to specify
1176 // concrete behavior
1177 return ((SunToolkit)tk).needsXEmbedImpl();
1178 } else {
1179 // Non-SunToolkit doubtly might support XEmbed
1180 return false;
1181 }
1182 }
1183
1184 /**
1185 * Returns whether this toolkit needs the support of the xembed
1186 * from embedding host(if any).
1187 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1188 */
1189 protected boolean needsXEmbedImpl() {
1190 return false;
1191 }
1192
1193 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1194
1195 /**
1196 * Returns whether the XEmbed server feature is requested by
1197 * developer. If true, Toolkit should return an
1198 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1199 */
1200 protected final boolean isXEmbedServerRequested() {
1201 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1202 }
1203
1204 /**
1205 * Returns whether the modal exclusion API is supported by the current toolkit.
1206 * When it isn't supported, calling {@code setModalExcluded} has no
1207 * effect, and {@code isModalExcluded} returns false for all windows.
1208 *
1209 * @return true if modal exclusion is supported by the toolkit, false otherwise
1210 *
1211 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1212 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1213 *
1214 * @since 1.5
1215 */
1216 public static boolean isModalExcludedSupported()
1217 {
1218 Toolkit tk = Toolkit.getDefaultToolkit();
1219 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1220 }
1221 /*
1222 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1223 *
1224 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1225 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1226 *
1227 * @since 1.5
1228 */
1229 protected boolean isModalExcludedSupportedImpl()
1230 {
1231 return false;
1232 }
1233
1234 /*
1235 * Sets this window to be excluded from being modally blocked. When the
1236 * toolkit supports modal exclusion and this method is called, input
1237 * events, focus transfer and z-order will continue to work for the
1238 * window, it's owned windows and child components, even in the
1239 * presence of a modal dialog.
1240 * For details on which {@code Window}s are normally blocked
1241 * by modal dialog, see {@link java.awt.Dialog}.
1242 * Invoking this method when the modal exclusion API is not supported by
1243 * the current toolkit has no effect.
1244 * @param window Window to be marked as not modally blocked
1245 * @see java.awt.Dialog
1246 * @see java.awt.Dialog#setModal(boolean)
1247 * @see sun.awt.SunToolkit#isModalExcludedSupported
1248 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1249 */
1250 public static void setModalExcluded(Window window)
1251 {
1252 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1253 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1254 }
1255 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1256 }
1257
1258 /*
1259 * Returns whether the specified window is blocked by modal dialogs.
1260 * If the modal exclusion API isn't supported by the current toolkit,
1261 * it returns false for all windows.
1262 *
1263 * @param window Window to test for modal exclusion
1264 *
1265 * @return true if the window is modal excluded, false otherwise. If
1266 * the modal exclusion isn't supported by the current Toolkit, false
1267 * is returned
1268 *
1269 * @see sun.awt.SunToolkit#isModalExcludedSupported
1270 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1271 *
1272 * @since 1.5
1273 */
1274 public static boolean isModalExcluded(Window window)
1275 {
1276 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1277 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1278 }
1279 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1280 }
1281
1282 /**
1283 * Overridden in XToolkit and WToolkit
1284 */
1285 @Override
1286 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1287 return (modalityType == Dialog.ModalityType.MODELESS) ||
1288 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1289 }
1290
1291 /**
1292 * Overridden in XToolkit and WToolkit
1293 */
1294 @Override
1295 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1296 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1297 }
1298
1299 ///////////////////////////////////////////////////////////////////////////
1300 //
1301 // The following is used by the Java Plug-in to coordinate dialog modality
1302 // between containing applications (browsers, ActiveX containers etc) and
1303 // the AWT.
1304 //
1305 ///////////////////////////////////////////////////////////////////////////
1306
1307 private ModalityListenerList modalityListeners = new ModalityListenerList();
1308
1309 public void addModalityListener(ModalityListener listener) {
1310 modalityListeners.add(listener);
1311 }
1312
1313 public void removeModalityListener(ModalityListener listener) {
1314 modalityListeners.remove(listener);
1315 }
1316
1317 public void notifyModalityPushed(Dialog dialog) {
1318 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1319 }
1320
1321 public void notifyModalityPopped(Dialog dialog) {
1322 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1323 }
1324
1325 final void notifyModalityChange(int id, Dialog source) {
1326 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1327 ev.dispatch();
1328 }
1329
1330 static class ModalityListenerList implements ModalityListener {
1331
1332 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1333
1334 void add(ModalityListener listener) {
1335 listeners.addElement(listener);
1336 }
1337
1338 void remove(ModalityListener listener) {
1339 listeners.removeElement(listener);
1340 }
1341
1342 @Override
1343 public void modalityPushed(ModalityEvent ev) {
1344 Iterator<ModalityListener> it = listeners.iterator();
1345 while (it.hasNext()) {
1346 it.next().modalityPushed(ev);
1347 }
1348 }
1349
1350 @Override
1351 public void modalityPopped(ModalityEvent ev) {
1352 Iterator<ModalityListener> it = listeners.iterator();
1353 while (it.hasNext()) {
1354 it.next().modalityPopped(ev);
1355 }
1356 }
1357 } // end of class ModalityListenerList
1358
1359 ///////////////////////////////////////////////////////////////////////////
1360 // End Plug-in code
1361 ///////////////////////////////////////////////////////////////////////////
1362
1363 public static boolean isLightweightOrUnknown(Component comp) {
1364 if (comp.isLightweight()
1365 || !(getDefaultToolkit() instanceof SunToolkit))
1366 {
1367 return true;
1368 }
1369 return !(comp instanceof Button
1370 || comp instanceof Canvas
1371 || comp instanceof Checkbox
1372 || comp instanceof Choice
1373 || comp instanceof Label
1374 || comp instanceof java.awt.List
1375 || comp instanceof Panel
1376 || comp instanceof Scrollbar
1377 || comp instanceof ScrollPane
1378 || comp instanceof TextArea
1379 || comp instanceof TextField
1380 || comp instanceof Window);
1381 }
1382
1383 @SuppressWarnings("serial")
1384 public static class OperationTimedOut extends RuntimeException {
1385 public OperationTimedOut(String msg) {
1386 super(msg);
1387 }
1388 public OperationTimedOut() {
1389 }
1390 }
1391
1392 @SuppressWarnings("serial")
1393 public static class InfiniteLoop extends RuntimeException {
1394 }
1395
1396 @SuppressWarnings("serial")
1397 public static class IllegalThreadException extends RuntimeException {
1398 public IllegalThreadException(String msg) {
1399 super(msg);
1400 }
1401 public IllegalThreadException() {
1402 }
1403 }
1404
1405 public static final int DEFAULT_WAIT_TIME = 10000;
1406 private static final int MAX_ITERS = 20;
1407 private static final int MIN_ITERS = 0;
1408 private static final int MINIMAL_EDELAY = 0;
1409
1410 /**
1411 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1412 */
1413 public void realSync() throws OperationTimedOut, InfiniteLoop {
1414 realSync(DEFAULT_WAIT_TIME);
1415 }
1416
1417 /**
1418 * Forces toolkit to synchronize with the native windowing
1419 * sub-system, flushing all pending work and waiting for all the
1420 * events to be processed. This method guarantees that after
1421 * return no additional Java events will be generated, unless
1422 * cause by user. Obviously, the method cannot be used on the
1423 * event dispatch thread (EDT). In case it nevertheless gets
1424 * invoked on this thread, the method throws the
1425 * IllegalThreadException runtime exception.
1426 *
1427 * <p> This method allows to write tests without explicit timeouts
1428 * or wait for some event. Example:
1429 * <pre>{@code
1430 * Frame f = ...;
1431 * f.setVisible(true);
1432 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1433 * }</pre>
1434 *
1435 * <p> After realSync, {@code f} will be completely visible
1436 * on the screen, its getLocationOnScreen will be returning the
1437 * right result and it will be the focus owner.
1438 *
1439 * <p> Another example:
1440 * <pre>{@code
1441 * b.requestFocus();
1442 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1443 * }</pre>
1444 *
1445 * <p> After realSync, {@code b} will be focus owner.
1446 *
1447 * <p> Notice that realSync isn't guaranteed to work if recurring
1448 * actions occur, such as if during processing of some event
1449 * another request which may generate some events occurs. By
1450 * default, sync tries to perform as much as {@value #MAX_ITERS}
1451 * cycles of event processing, allowing for roughly {@value
1452 * #MAX_ITERS} additional requests.
1453 *
1454 * <p> For example, requestFocus() generates native request, which
1455 * generates one or two Java focus events, which then generate a
1456 * serie of paint events, a serie of Java focus events, which then
1457 * generate a serie of paint events which then are processed -
1458 * three cycles, minimum.
1459 *
1460 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1461 */
1462 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1463 {
1464 if (EventQueue.isDispatchThread()) {
1465 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1466 }
1467 int bigLoop = 0;
1468 do {
1469 // Let's do sync first
1470 sync();
1471
1472 // During the wait process, when we were processing incoming
1473 // events, we could have made some new request, which can
1474 // generate new events. Example: MapNotify/XSetInputFocus.
1475 // Therefore, we dispatch them as long as there is something
1476 // to dispatch.
1477 int iters = 0;
1478 while (iters < MIN_ITERS) {
1479 syncNativeQueue(timeout);
1480 iters++;
1481 }
1482 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1483 iters++;
1484 }
1485 if (iters >= MAX_ITERS) {
1486 throw new InfiniteLoop();
1487 }
1488
1489 // native requests were dispatched by X/Window Manager or Windows
1490 // Moreover, we processed them all on Toolkit thread
1491 // Now wait while EDT processes them.
1492 //
1493 // During processing of some events (focus, for example),
1494 // some other events could have been generated. So, after
1495 // waitForIdle, we may end up with full EventQueue
1496 iters = 0;
1497 while (iters < MIN_ITERS) {
1498 waitForIdle(timeout);
1499 iters++;
1500 }
1501 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1502 iters++;
1503 }
1504 if (iters >= MAX_ITERS) {
1505 throw new InfiniteLoop();
1506 }
1507
1508 bigLoop++;
1509 // Again, for Java events, it was simple to check for new Java
1510 // events by checking event queue, but what if Java events
1511 // resulted in native requests? Therefor, check native events again.
1512 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1513 }
1514
1515 /**
1516 * Platform toolkits need to implement this method to perform the
1517 * sync of the native queue. The method should wait until native
1518 * requests are processed, all native events are processed and
1519 * corresponding Java events are generated. Should return
1520 * {@code true} if some events were processed,
1521 * {@code false} otherwise.
1522 */
1523 protected abstract boolean syncNativeQueue(final long timeout);
1524
1525 private boolean eventDispatched;
1526 private boolean queueEmpty;
1527 private final Object waitLock = new Object();
1528
1529 private boolean isEQEmpty() {
1530 EventQueue queue = getSystemEventQueueImpl();
1531 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1532 }
1533
1534 /**
1535 * Waits for the Java event queue to empty. Ensures that all
1536 * events are processed (including paint events), and that if
1537 * recursive events were generated, they are also processed.
1538 * Should return {@code true} if more processing is
1539 * necessary, {@code false} otherwise.
1540 */
1541 @SuppressWarnings("serial")
1542 protected final boolean waitForIdle(final long timeout) {
1543 flushPendingEvents();
1544 final boolean queueWasEmpty;
1545 synchronized (waitLock) {
1546 queueWasEmpty = isEQEmpty();
1547 queueEmpty = false;
1548 eventDispatched = false;
1549 postEvent(AppContext.getAppContext(),
1550 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1551 @Override
1552 public void dispatch() {
1553 // Here we block EDT. It could have some
1554 // events, it should have dispatched them by
1555 // now. So native requests could have been
1556 // generated. First, dispatch them. Then,
1557 // flush Java events again.
1558 int iters = 0;
1559 while (iters < MIN_ITERS) {
1560 syncNativeQueue(timeout);
1561 iters++;
1562 }
1563 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1564 iters++;
1565 }
1566 flushPendingEvents();
1567
1568 synchronized(waitLock) {
1569 queueEmpty = isEQEmpty();
1570 eventDispatched = true;
1571 waitLock.notifyAll();
1572 }
1573 }
1574 });
1575 try {
1576 while (!eventDispatched) {
1577 waitLock.wait();
1578 }
1579 } catch (InterruptedException ie) {
1580 return false;
1581 }
1582 }
1583
1584 try {
1585 Thread.sleep(MINIMAL_EDELAY);
1586 } catch (InterruptedException ie) {
1587 throw new RuntimeException("Interrupted");
1588 }
1589
1590 flushPendingEvents();
1591
1592 // Lock to force write-cache flush for queueEmpty.
1593 synchronized (waitLock) {
1594 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1595 }
1596 }
1597
1598 /**
1599 * Grabs the mouse input for the given window. The window must be
1600 * visible. The window or its children do not receive any
1601 * additional mouse events besides those targeted to them. All
1602 * other events will be dispatched as before - to the respective
1603 * targets. This Window will receive UngrabEvent when automatic
1604 * ungrab is about to happen. The event can be listened to by
1605 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1606 * UngrabEvent class for the list of conditions when ungrab is
1607 * about to happen.
1608 * @see UngrabEvent
1609 */
1610 public abstract void grab(Window w);
1611
1612 /**
1613 * Forces ungrab. No event will be sent.
1614 */
1615 public abstract void ungrab(Window w);
1616
1617
1618 /**
1619 * Locates the splash screen library in a platform dependent way and closes
1620 * the splash screen. Should be invoked on first top-level frame display.
1621 * @see java.awt.SplashScreen
1622 * @since 1.6
1623 */
1624 public static native void closeSplashScreen();
1625
1626 /* The following methods and variables are to support retrieving
1627 * desktop text anti-aliasing settings
1628 */
1629
1630 /* Need an instance method because setDesktopProperty(..) is protected. */
1631 private void fireDesktopFontPropertyChanges() {
1632 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1633 SunToolkit.getDesktopFontHints());
1634 }
1635
1636 private static boolean checkedSystemAAFontSettings;
1637 private static boolean useSystemAAFontSettings;
1638 private static boolean lastExtraCondition = true;
1639 private static RenderingHints desktopFontHints;
1640
1641 /* Since Swing is the reason for this "extra condition" logic its
1642 * worth documenting it in some detail.
1643 * First, a goal is for Swing and applications to both retrieve and
1644 * use the same desktop property value so that there is complete
1645 * consistency between the settings used by JDK's Swing implementation
1646 * and 3rd party custom Swing components, custom L&Fs and any general
1647 * text rendering that wants to be consistent with these.
1648 * But by default on Solaris & Linux Swing will not use AA text over
1649 * remote X11 display (unless Xrender can be used which is TBD and may not
1650 * always be available anyway) as that is a noticeable performance hit.
1651 * So there needs to be a way to express that extra condition so that
1652 * it is seen by all clients of the desktop property API.
1653 * If this were the only condition it could be handled here as it would
1654 * be the same for any L&F and could reasonably be considered to be
1655 * a static behaviour of those systems.
1656 * But GTK currently has an additional test based on locale which is
1657 * not applied by Metal. So mixing GTK in a few locales with Metal
1658 * would mean the last one wins.
1659 * This could be stored per-app context which would work
1660 * for different applets, but wouldn't help for a single application
1661 * using GTK and some other L&F concurrently.
1662 * But it is expected this will be addressed within GTK and the font
1663 * system so is a temporary and somewhat unlikely harmless corner case.
1664 */
1665 public static void setAAFontSettingsCondition(boolean extraCondition) {
1666 if (extraCondition != lastExtraCondition) {
1667 lastExtraCondition = extraCondition;
1668 if (checkedSystemAAFontSettings) {
1669 /* Someone already asked for this info, under a different
1670 * condition.
1671 * We'll force re-evaluation instead of replicating the
1672 * logic, then notify any listeners of any change.
1673 */
1674 checkedSystemAAFontSettings = false;
1675 Toolkit tk = Toolkit.getDefaultToolkit();
1676 if (tk instanceof SunToolkit) {
1677 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1678 }
1679 }
1680 }
1681 }
1682
1683 /* "false", "off", ""default" aren't explicitly tested, they
1684 * just fall through to produce a null return which all are equated to
1685 * "false".
1686 */
1687 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1688 Object aaHint = null;
1689 hintname = hintname.toLowerCase(Locale.ENGLISH);
1690 if (hintname.equals("on")) {
1691 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1692 } else if (hintname.equals("gasp")) {
1693 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1694 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1695 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1696 } else if (hintname.equals("lcd_hbgr")) {
1697 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1698 } else if (hintname.equals("lcd_vrgb")) {
1699 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1700 } else if (hintname.equals("lcd_vbgr")) {
1701 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1702 }
1703 if (aaHint != null) {
1704 RenderingHints map = new RenderingHints(null);
1705 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1706 return map;
1707 } else {
1708 return null;
1709 }
1710 }
1711
1712 /* This method determines whether to use the system font settings,
1713 * or ignore them if a L&F has specified they should be ignored, or
1714 * to override both of these with a system property specified value.
1715 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1716 * system property isn't applied as desktop properties are considered
1717 * to be inapplicable in that case. In that headless case although
1718 * this method will return "true" the toolkit will return a null map.
1719 */
1720 private static boolean useSystemAAFontSettings() {
1721 if (!checkedSystemAAFontSettings) {
1722 useSystemAAFontSettings = true; /* initially set this true */
1723 String systemAAFonts = null;
1724 Toolkit tk = Toolkit.getDefaultToolkit();
1725 if (tk instanceof SunToolkit) {
1726 systemAAFonts =
1727 AccessController.doPrivileged(
1728 new GetPropertyAction("awt.useSystemAAFontSettings"));
1729 }
1730 if (systemAAFonts != null) {
1731 useSystemAAFontSettings =
1732 Boolean.valueOf(systemAAFonts).booleanValue();
1733 /* If it is anything other than "true", then it may be
1734 * a hint name , or it may be "off, "default", etc.
1735 */
1736 if (!useSystemAAFontSettings) {
1737 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1738 }
1739 }
1740 /* If its still true, apply the extra condition */
1741 if (useSystemAAFontSettings) {
1742 useSystemAAFontSettings = lastExtraCondition;
1743 }
1744 checkedSystemAAFontSettings = true;
1745 }
1746 return useSystemAAFontSettings;
1747 }
1748
1749 /* A variable defined for the convenience of JDK code */
1750 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1751
1752 /* Overridden by subclasses to return platform/desktop specific values */
1753 protected RenderingHints getDesktopAAHints() {
1754 return null;
1755 }
1756
1757 /* Subclass desktop property loading methods call this which
1758 * in turn calls the appropriate subclass implementation of
1759 * getDesktopAAHints() when system settings are being used.
1760 * Its public rather than protected because subclasses may delegate
1761 * to a helper class.
1762 */
1763 public static RenderingHints getDesktopFontHints() {
1764 if (useSystemAAFontSettings()) {
1765 Toolkit tk = Toolkit.getDefaultToolkit();
1766 if (tk instanceof SunToolkit) {
1767 Object map = ((SunToolkit)tk).getDesktopAAHints();
1768 return (RenderingHints)map;
1769 } else { /* Headless Toolkit */
1770 return null;
1771 }
1772 } else if (desktopFontHints != null) {
1773 /* cloning not necessary as the return value is cloned later, but
1774 * its harmless.
1775 */
1776 return (RenderingHints)(desktopFontHints.clone());
1777 } else {
1778 return null;
1779 }
1780 }
1781
1782
1783 public abstract boolean isDesktopSupported();
1784 public abstract boolean isTaskbarSupported();
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} ancestor of the component {@code comp}.
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 static synchronized 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 public void updateScreenMenuBarUI() {
1871 }
1872
1873 // Cosntant alpha
1874 public boolean isWindowOpacitySupported() {
1875 return false;
1876 }
1877
1878 // Shaping
1879 public boolean isWindowShapingSupported() {
1880 return false;
1881 }
1882
1883 // Per-pixel alpha
1884 public boolean isWindowTranslucencySupported() {
1885 return false;
1886 }
1887
1888 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1889 return false;
1890 }
1891
1892 /**
1893 * Returns true if swing backbuffer should be translucent.
1894 */
1895 public boolean isSwingBackbufferTranslucencySupported() {
1896 return false;
1897 }
1898
1899 /**
1900 * Returns whether or not a containing top level window for the passed
1901 * component is
1902 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1903 *
1904 * @param c a Component which toplevel's to check
1905 * @return {@code true} if the passed component is not null and has a
1906 * containing toplevel window which is opaque (so per-pixel translucency
1907 * is not enabled), {@code false} otherwise
1908 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1909 */
1910 public static boolean isContainingTopLevelOpaque(Component c) {
1911 Window w = getContainingWindow(c);
1912 return w != null && w.isOpaque();
1913 }
1914
1915 /**
1916 * Returns whether or not a containing top level window for the passed
1917 * component is
1918 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1919 *
1920 * @param c a Component which toplevel's to check
1921 * @return {@code true} if the passed component is not null and has a
1922 * containing toplevel window which has opacity less than
1923 * 1.0f (which means that it is translucent), {@code false} otherwise
1924 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1925 */
1926 public static boolean isContainingTopLevelTranslucent(Component c) {
1927 Window w = getContainingWindow(c);
1928 return w != null && w.getOpacity() < 1.0f;
1929 }
1930
1931 /**
1932 * Returns whether the native system requires using the peer.updateWindow()
1933 * method to update the contents of a non-opaque window, or if usual
1934 * painting procedures are sufficient. The default return value covers
1935 * the X11 systems. On MS Windows this method is overriden in WToolkit
1936 * to return true.
1937 */
1938 public boolean needUpdateWindow() {
1939 return false;
1940 }
1941
1942 /**
1943 * Descendants of the SunToolkit should override and put their own logic here.
1944 */
1945 public int getNumberOfButtons(){
1946 return 3;
1947 }
1948
1949 /**
1950 * Checks that the given object implements/extends the given
1951 * interface/class.
1952 *
1953 * Note that using the instanceof operator causes a class to be loaded.
1954 * Using this method doesn't load a class and it can be used instead of
1955 * the instanceof operator for performance reasons.
1956 *
1957 * @param obj Object to be checked
1958 * @param type The name of the interface/class. Must be
1959 * fully-qualified interface/class name.
1960 * @return true, if this object implements/extends the given
1961 * interface/class, false, otherwise, or if obj or type is null
1962 */
1963 public static boolean isInstanceOf(Object obj, String type) {
1964 if (obj == null) return false;
1965 if (type == null) return false;
1966
1967 return isInstanceOf(obj.getClass(), type);
1968 }
1969
1970 private static boolean isInstanceOf(Class<?> cls, String type) {
1971 if (cls == null) return false;
1972
1973 if (cls.getName().equals(type)) {
1974 return true;
1975 }
1976
1977 for (Class<?> c : cls.getInterfaces()) {
1978 if (c.getName().equals(type)) {
1979 return true;
1980 }
1981 }
1982 return isInstanceOf(cls.getSuperclass(), type);
1983 }
1984
1985 protected static LightweightFrame getLightweightFrame(Component c) {
1986 for (; c != null; c = c.getParent()) {
1987 if (c instanceof LightweightFrame) {
1988 return (LightweightFrame)c;
1989 }
1990 if (c instanceof Window) {
1991 // Don't traverse owner windows
1992 return null;
1993 }
1994 }
1995 return null;
1996 }
1997
1998 ///////////////////////////////////////////////////////////////////////////
1999 //
2000 // The following methods help set and identify whether a particular
2001 // AWTEvent object was produced by the system or by user code. As of this
2002 // writing the only consumer is the Java Plug-In, although this information
2003 // could be useful to more clients and probably should be formalized in
2004 // the public API.
2005 //
2006 ///////////////////////////////////////////////////////////////////////////
2007
2008 public static void setSystemGenerated(AWTEvent e) {
2009 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2010 }
2011
2012 public static boolean isSystemGenerated(AWTEvent e) {
2013 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2014 }
2015
2016 } // class SunToolkit
2017
2018
2019 /*
2020 * PostEventQueue is a Thread that runs in the same AppContext as the
2021 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2022 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2023 * events to this queue, which then calls EventQueue.postEvent().
2024 *
2025 * We do this because EventQueue.postEvent() may be overridden by client
2026 * code, and we mustn't ever call client code from the toolkit thread.
2027 */
2028 class PostEventQueue {
2029 private EventQueueItem queueHead = null;
2030 private EventQueueItem queueTail = null;
2031 private final EventQueue eventQueue;
2032
2033 private Thread flushThread = null;
2034
2035 PostEventQueue(EventQueue eq) {
2036 eventQueue = eq;
2037 }
2038
2039 /*
2040 * Continually post pending AWTEvents to the Java EventQueue. The method
2041 * is synchronized to ensure the flush is completed before a new event
2042 * can be posted to this queue.
2043 *
2044 * 7177040: The method couldn't be wholly synchronized because of calls
2045 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2046 * potentially lead to deadlock
2047 */
2048 public void flush() {
2049
2050 Thread newThread = Thread.currentThread();
2051
2052 try {
2053 EventQueueItem tempQueue;
2054 synchronized (this) {
2055 // Avoid method recursion
2056 if (newThread == flushThread) {
2057 return;
2058 }
2059 // Wait for other threads' flushing
2060 while (flushThread != null) {
2061 wait();
2062 }
2063 // Skip everything if queue is empty
2064 if (queueHead == null) {
2065 return;
2066 }
2067 // Remember flushing thread
2068 flushThread = newThread;
2069
2070 tempQueue = queueHead;
2071 queueHead = queueTail = null;
2072 }
2073 try {
2074 while (tempQueue != null) {
2075 eventQueue.postEvent(tempQueue.event);
2076 tempQueue = tempQueue.next;
2077 }
2078 }
2079 finally {
2080 // Only the flushing thread can get here
2081 synchronized (this) {
2082 // Forget flushing thread, inform other pending threads
2083 flushThread = null;
2084 notifyAll();
2085 }
2086 }
2087 }
2088 catch (InterruptedException e) {
2089 // Couldn't allow exception go up, so at least recover the flag
2090 newThread.interrupt();
2091 }
2092 }
2093
2094 /*
2095 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2096 */
2097 void postEvent(AWTEvent event) {
2098 EventQueueItem item = new EventQueueItem(event);
2099
2100 synchronized (this) {
2101 if (queueHead == null) {
2102 queueHead = queueTail = item;
2103 } else {
2104 queueTail.next = item;
2105 queueTail = item;
2106 }
2107 }
2108 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2109 }
2110 } // class PostEventQueue