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 sun.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.security.action.GetBooleanAction;
70 import sun.security.action.GetPropertyAction;
71 import sun.util.logging.PlatformLogger;
72
73 import static java.awt.RenderingHints.*;
74
75 public abstract class SunToolkit extends Toolkit
76 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
77
78 // 8014718: logging has been removed from SunToolkit
79
80 /* Load debug settings for native code */
81 static {
82 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
83 DebugSettings.init();
84 }
85 };
86
87 /**
88 * Special mask for the UngrabEvent events, in addition to the
89 * public masks defined in AWTEvent. Should be used as the mask
90 * value for Toolkit.addAWTEventListener.
91 */
92 public static final int GRAB_EVENT_MASK = 0x80000000;
93
94 /* The key to put()/get() the PostEventQueue into/from the AppContext.
95 */
96 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
97
98 /**
99 * Number of buttons.
100 * By default it's taken from the system. If system value does not
101 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
102 */
103 protected static int numberOfButtons = 0;
104
105
106 /* XFree standard mention 24 buttons as maximum:
107 * http://www.xfree86.org/current/mouse.4.html
108 * We workaround systems supporting more than 24 buttons.
109 * Otherwise, we have to use long type values as masks
110 * which leads to API change.
111 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
112 * the 4-bytes limit for the int type. (CR 6799099)
113 * One more bit is reserved for FIRST_HIGH_BIT.
114 */
115 public final static int MAX_BUTTONS_SUPPORTED = 20;
116
117 /**
118 * Creates and initializes EventQueue instance for the specified
119 * AppContext.
120 * Note that event queue must be created from createNewAppContext()
121 * only in order to ensure that EventQueue constructor obtains
122 * the correct AppContext.
123 * @param appContext AppContext to associate with the event queue
124 */
125 private static void initEQ(AppContext appContext) {
126 EventQueue eventQueue;
127
128 String eqName = System.getProperty("AWT.EventQueueClass",
129 "java.awt.EventQueue");
130
131 try {
132 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
133 } catch (Exception e) {
134 e.printStackTrace();
135 System.err.println("Failed loading " + eqName + ": " + e);
136 eventQueue = new EventQueue();
137 }
138 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
139
140 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
141 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
142 }
143
144 public SunToolkit() {
145 }
146
147 public boolean useBufferPerWindow() {
148 return false;
149 }
150
151 public abstract FramePeer createLightweightFrame(LightweightFrame target)
152 throws HeadlessException;
153
154 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
155 throws HeadlessException, AWTException;
156
157 public abstract SystemTrayPeer createSystemTray(SystemTray target);
158
159 public abstract boolean isTraySupported();
160
161 @Override
162 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
163 throws HeadlessException;
164
165 /**
166 * The AWT lock is typically only used on Unix platforms to synchronize
167 * access to Xlib, OpenGL, etc. However, these methods are implemented
168 * in SunToolkit so that they can be called from shared code (e.g.
169 * from the OGL pipeline) or from the X11 pipeline regardless of whether
170 * XToolkit or MToolkit is currently in use. There are native macros
171 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
172 * methods is changed, make sure it is compatible with the native macros.
173 *
174 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
175 * used in place of:
176 * synchronized (getAWTLock()) {
177 * ...
178 * }
179 *
180 * By factoring these methods out specially, we are able to change the
181 * implementation of these methods (e.g. use more advanced locking
182 * mechanisms) without impacting calling code.
183 *
184 * Sample usage:
185 * private void doStuffWithXlib() {
186 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
187 * SunToolkit.awtLock();
188 * try {
189 * ...
190 * XlibWrapper.XDoStuff();
191 * } finally {
192 * SunToolkit.awtUnlock();
193 * }
194 * }
195 */
196
197 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
198 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
199
200 public static final void awtLock() {
201 AWT_LOCK.lock();
202 }
203
204 public static final boolean awtTryLock() {
205 return AWT_LOCK.tryLock();
206 }
207
208 public static final void awtUnlock() {
209 AWT_LOCK.unlock();
210 }
211
212 public static final void awtLockWait()
213 throws InterruptedException
214 {
215 AWT_LOCK_COND.await();
216 }
217
218 public static final void awtLockWait(long timeout)
219 throws InterruptedException
220 {
221 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
222 }
223
224 public static final void awtLockNotify() {
225 AWT_LOCK_COND.signal();
226 }
227
228 public static final void awtLockNotifyAll() {
229 AWT_LOCK_COND.signalAll();
230 }
231
232 public static final boolean isAWTLockHeldByCurrentThread() {
233 return AWT_LOCK.isHeldByCurrentThread();
234 }
235
236 /*
237 * Create a new AppContext, along with its EventQueue, for a
238 * new ThreadGroup. Browser code, for example, would use this
239 * method to create an AppContext & EventQueue for an Applet.
240 */
241 public static AppContext createNewAppContext() {
242 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
243 return createNewAppContext(threadGroup);
244 }
245
246 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
247 // Create appContext before initialization of EventQueue, so all
248 // the calls to AppContext.getAppContext() from EventQueue ctor
249 // return correct values
250 AppContext appContext = new AppContext(threadGroup);
251 initEQ(appContext);
252
253 return appContext;
254 }
255
256 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
257 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
258 }
259
260 /*
261 * Fetch the peer associated with the given target (as specified
262 * in the peer creation method). This can be used to determine
263 * things like what the parent peer is. If the target is null
264 * or the target can't be found (either because the a peer was
265 * never created for it or the peer was disposed), a null will
266 * be returned.
267 */
268 protected static Object targetToPeer(Object target) {
269 if (target != null && !GraphicsEnvironment.isHeadless()) {
270 return AWTAutoShutdown.getInstance().getPeer(target);
271 }
272 return null;
273 }
274
275 protected static void targetCreatedPeer(Object target, Object peer) {
276 if (target != null && peer != null &&
277 !GraphicsEnvironment.isHeadless())
278 {
279 AWTAutoShutdown.getInstance().registerPeer(target, peer);
280 }
281 }
282
283 protected static void targetDisposedPeer(Object target, Object peer) {
284 if (target != null && peer != null &&
285 !GraphicsEnvironment.isHeadless())
286 {
287 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
288 }
289 }
290
291 // Maps from non-Component/MenuComponent to AppContext.
292 // WeakHashMap<Component,AppContext>
293 private static final Map<Object, AppContext> appContextMap =
294 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
295
296 /**
297 * Sets the appContext field of target. If target is not a Component or
298 * MenuComponent, this returns false.
299 */
300 private static boolean setAppContext(Object target,
301 AppContext context) {
302 if (target instanceof Component) {
303 AWTAccessor.getComponentAccessor().
304 setAppContext((Component)target, context);
305 } else if (target instanceof MenuComponent) {
306 AWTAccessor.getMenuComponentAccessor().
307 setAppContext((MenuComponent)target, context);
308 } else {
309 return false;
310 }
311 return true;
312 }
313
314 /**
315 * Returns the appContext field for target. If target is not a
316 * Component or MenuComponent this returns null.
317 */
318 private static AppContext getAppContext(Object target) {
319 if (target instanceof Component) {
320 return AWTAccessor.getComponentAccessor().
321 getAppContext((Component)target);
322 } else if (target instanceof MenuComponent) {
323 return AWTAccessor.getMenuComponentAccessor().
324 getAppContext((MenuComponent)target);
325 } else {
326 return null;
327 }
328 }
329
330 /*
331 * Fetch the AppContext associated with the given target.
332 * This can be used to determine things like which EventQueue
333 * to use for posting events to a Component. If the target is
334 * null or the target can't be found, a null with be returned.
335 */
336 public static AppContext targetToAppContext(Object target) {
337 if (target == null) {
338 return null;
339 }
340 AppContext context = getAppContext(target);
341 if (context == null) {
342 // target is not a Component/MenuComponent, try the
343 // appContextMap.
344 context = appContextMap.get(target);
345 }
346 return context;
347 }
348
349 /**
350 * Sets the synchronous status of focus requests on lightweight
351 * components in the specified window to the specified value.
352 * If the boolean parameter is <code>true</code> then the focus
353 * requests on lightweight components will be performed
354 * synchronously, if it is <code>false</code>, then asynchronously.
355 * By default, all windows have their lightweight request status
356 * set to asynchronous.
357 * <p>
358 * The application can only set the status of lightweight focus
359 * requests to synchronous for any of its windows if it doesn't
360 * perform focus transfers between different heavyweight containers.
361 * In this case the observable focus behaviour is the same as with
362 * asynchronous status.
363 * <p>
364 * If the application performs focus transfer between different
365 * heavyweight containers and sets the lightweight focus request
366 * status to synchronous for any of its windows, then further focus
367 * behaviour is unspecified.
368 * <p>
369 * @param w window for which the lightweight focus request status
370 * should be set
371 * @param status the value of lightweight focus request status
372 */
373
374 public static void setLWRequestStatus(Window changed,boolean status){
375 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
376 };
377
378 public static void checkAndSetPolicy(Container cont) {
379 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
380 getCurrentKeyboardFocusManager().
381 getDefaultFocusTraversalPolicy();
382
383 cont.setFocusTraversalPolicy(defaultPolicy);
384 }
385
386 private static FocusTraversalPolicy createLayoutPolicy() {
387 FocusTraversalPolicy policy = null;
388 try {
389 Class<?> layoutPolicyClass =
390 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
391 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
392 }
393 catch (ClassNotFoundException e) {
394 assert false;
395 }
396 catch (InstantiationException e) {
397 assert false;
398 }
399 catch (IllegalAccessException e) {
400 assert false;
401 }
402
403 return policy;
404 }
405
406 /*
407 * Insert a mapping from target to AppContext, for later retrieval
408 * via targetToAppContext() above.
409 */
410 public static void insertTargetMapping(Object target, AppContext appContext) {
411 if (!setAppContext(target, appContext)) {
412 // Target is not a Component/MenuComponent, use the private Map
413 // instead.
414 appContextMap.put(target, appContext);
415 }
416 }
417
418 /*
419 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
420 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
421 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
422 * not be called under another lock since it locks the EventQueue.
423 * See bugids 4632918, 4526597.
424 */
425 public static void postEvent(AppContext appContext, AWTEvent event) {
426 if (event == null) {
427 throw new NullPointerException();
428 }
429
430 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
431 if (sea != null && sea.isSequencedEvent(event)) {
432 AWTEvent nested = sea.getNested(event);
433 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
434 nested instanceof TimedWindowEvent)
435 {
436 TimedWindowEvent twe = (TimedWindowEvent)nested;
437 ((SunToolkit)Toolkit.getDefaultToolkit()).
438 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
439 }
440 }
441
442 // All events posted via this method are system-generated.
443 // Placing the following call here reduces considerably the
444 // number of places throughout the toolkit that would
445 // otherwise have to be modified to precisely identify
446 // system-generated events.
447 setSystemGenerated(event);
448 AppContext eventContext = targetToAppContext(event.getSource());
449 if (eventContext != null && !eventContext.equals(appContext)) {
450 throw new RuntimeException("Event posted on wrong app context : " + event);
451 }
452 PostEventQueue postEventQueue =
453 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
454 if (postEventQueue != null) {
455 postEventQueue.postEvent(event);
456 }
457 }
458
459 /*
460 * Post AWTEvent of high priority.
461 */
462 public static void postPriorityEvent(final AWTEvent e) {
463 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
464 @Override
465 public void run() {
466 AWTAccessor.getAWTEventAccessor().setPosted(e);
467 ((Component)e.getSource()).dispatchEvent(e);
468 }
469 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
470 postEvent(targetToAppContext(e.getSource()), pe);
471 }
472
473 /*
474 * Flush any pending events which haven't been posted to the AWT
475 * EventQueue yet.
476 */
477 public static void flushPendingEvents() {
478 AppContext appContext = AppContext.getAppContext();
479 flushPendingEvents(appContext);
480 }
481
482 /*
483 * Flush the PostEventQueue for the right AppContext.
484 * The default flushPendingEvents only flushes the thread-local context,
485 * which is not always correct, c.f. 3746956
486 */
487 public static void flushPendingEvents(AppContext appContext) {
488 PostEventQueue postEventQueue =
489 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
490 if (postEventQueue != null) {
491 postEventQueue.flush();
492 }
493 }
494
495 /*
496 * Execute a chunk of code on the Java event handler thread for the
497 * given target. Does not wait for the execution to occur before
498 * returning to the caller.
499 */
500 public static void executeOnEventHandlerThread(Object target,
501 Runnable runnable) {
502 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
503 }
504
505 /*
506 * Fixed 5064013: the InvocationEvent time should be equals
507 * the time of the ActionEvent
508 */
509 @SuppressWarnings("serial")
510 public static void executeOnEventHandlerThread(Object target,
511 Runnable runnable,
512 final long when) {
513 executeOnEventHandlerThread(
514 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
515 @Override
516 public long getWhen() {
517 return when;
518 }
519 });
520 }
521
522 /*
523 * Execute a chunk of code on the Java event handler thread for the
524 * given target. Does not wait for the execution to occur before
525 * returning to the caller.
526 */
527 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
528 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
529 }
530
531 /*
532 * Execute a chunk of code on the Java event handler thread. The
533 * method takes into account provided AppContext and sets
534 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
535 * event. See 6451487 for detailes.
536 * Does not wait for the execution to occur before returning to
537 * the caller.
538 */
539 public static void invokeLaterOnAppContext(
540 AppContext appContext, Runnable dispatcher)
541 {
542 postEvent(appContext,
543 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
544 PeerEvent.PRIORITY_EVENT));
545 }
546
547 /*
548 * Execute a chunk of code on the Java event handler thread for the
549 * given target. Waits for the execution to occur before returning
550 * to the caller.
551 */
552 public static void executeOnEDTAndWait(Object target, Runnable runnable)
553 throws InterruptedException, InvocationTargetException
554 {
555 if (EventQueue.isDispatchThread()) {
556 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
557 }
558
559 class AWTInvocationLock {}
560 Object lock = new AWTInvocationLock();
561
562 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
563
564 synchronized (lock) {
565 executeOnEventHandlerThread(event);
566 while(!event.isDispatched()) {
567 lock.wait();
568 }
569 }
570
571 Throwable eventThrowable = event.getThrowable();
572 if (eventThrowable != null) {
573 throw new InvocationTargetException(eventThrowable);
574 }
575 }
576
577 /*
578 * Returns true if the calling thread is the event dispatch thread
579 * contained within AppContext which associated with the given target.
580 * Use this call to ensure that a given task is being executed
581 * (or not being) on the event dispatch thread for the given target.
582 */
583 public static boolean isDispatchThreadForAppContext(Object target) {
584 AppContext appContext = targetToAppContext(target);
585 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
586
587 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
588 return accessor.isDispatchThreadImpl(eq);
589 }
590
591 @Override
592 public Dimension getScreenSize() {
593 return new Dimension(getScreenWidth(), getScreenHeight());
594 }
595 protected abstract int getScreenWidth();
596 protected abstract int getScreenHeight();
597
598 @Override
599 @SuppressWarnings("deprecation")
600 public FontMetrics getFontMetrics(Font font) {
601 return FontDesignMetrics.getMetrics(font);
602 }
603
604 @Override
605 @SuppressWarnings("deprecation")
606 public String[] getFontList() {
607 String[] hardwiredFontList = {
608 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
609 Font.DIALOG_INPUT
610
611 // -- Obsolete font names from 1.0.2. It was decided that
612 // -- getFontList should not return these old names:
613 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
614 };
615 return hardwiredFontList;
616 }
617
618 /**
619 * Disables erasing of background on the canvas before painting if
620 * this is supported by the current toolkit. It is recommended to
621 * call this method early, before the Canvas becomes displayable,
622 * because some Toolkit implementations do not support changing
623 * this property once the Canvas becomes displayable.
624 */
625 public void disableBackgroundErase(Canvas canvas) {
626 disableBackgroundEraseImpl(canvas);
627 }
628
629 /**
630 * Disables the native erasing of the background on the given
631 * component before painting if this is supported by the current
632 * toolkit. This only has an effect for certain components such as
633 * Canvas, Panel and Window. It is recommended to call this method
634 * early, before the Component becomes displayable, because some
635 * Toolkit implementations do not support changing this property
636 * once the Component becomes displayable.
637 */
638 public void disableBackgroundErase(Component component) {
639 disableBackgroundEraseImpl(component);
640 }
641
642 private void disableBackgroundEraseImpl(Component component) {
643 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
644 }
645
646 /**
647 * Returns the value of "sun.awt.noerasebackground" property. Default
648 * value is {@code false}.
649 */
650 public static boolean getSunAwtNoerasebackground() {
651 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
652 }
653
654 /**
655 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
656 * value is {@code false}.
657 */
658 public static boolean getSunAwtErasebackgroundonresize() {
659 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
660 }
661
662
663 @SuppressWarnings("deprecation")
664 static final SoftCache imgCache = new SoftCache();
665
666 static Image getImageFromHash(Toolkit tk, URL url) {
667 checkPermissions(url);
668 synchronized (imgCache) {
669 Image img = (Image)imgCache.get(url);
670 if (img == null) {
671 try {
672 img = tk.createImage(new URLImageSource(url));
673 imgCache.put(url, img);
674 } catch (Exception e) {
675 }
676 }
677 return img;
678 }
679 }
680
681 static Image getImageFromHash(Toolkit tk,
682 String filename) {
683 checkPermissions(filename);
684 synchronized (imgCache) {
685 Image img = (Image)imgCache.get(filename);
686 if (img == null) {
687 try {
688 img = tk.createImage(new FileImageSource(filename));
689 imgCache.put(filename, img);
690 } catch (Exception e) {
691 }
692 }
693 return img;
694 }
695 }
696
697 @Override
698 public Image getImage(String filename) {
699 return getImageFromHash(this, filename);
700 }
701
702 @Override
703 public Image getImage(URL url) {
704 return getImageFromHash(this, url);
705 }
706
707 protected Image getImageWithResolutionVariant(String fileName,
708 String resolutionVariantName) {
709 synchronized (imgCache) {
710 Image image = getImageFromHash(this, fileName);
711 if (image instanceof MultiResolutionImage) {
712 return image;
713 }
714 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
715 image = createImageWithResolutionVariant(image, resolutionVariant);
716 imgCache.put(fileName, image);
717 return image;
718 }
719 }
720
721 protected Image getImageWithResolutionVariant(URL url,
722 URL resolutionVariantURL) {
723 synchronized (imgCache) {
724 Image image = getImageFromHash(this, url);
725 if (image instanceof MultiResolutionImage) {
726 return image;
727 }
728 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
729 image = createImageWithResolutionVariant(image, resolutionVariant);
730 imgCache.put(url, image);
731 return image;
732 }
733 }
734
735
736 @Override
737 public Image createImage(String filename) {
738 checkPermissions(filename);
739 return createImage(new FileImageSource(filename));
740 }
741
742 @Override
743 public Image createImage(URL url) {
744 checkPermissions(url);
745 return createImage(new URLImageSource(url));
746 }
747
748 @Override
749 public Image createImage(byte[] data, int offset, int length) {
750 return createImage(new ByteArrayImageSource(data, offset, length));
751 }
752
753 @Override
754 public Image createImage(ImageProducer producer) {
755 return new ToolkitImage(producer);
756 }
757
758 public static Image createImageWithResolutionVariant(Image image,
759 Image resolutionVariant) {
760 return new MultiResolutionToolkitImage(image, resolutionVariant);
761 }
762
763 @Override
764 public int checkImage(Image img, int w, int h, ImageObserver o) {
765 if (!(img instanceof ToolkitImage)) {
766 return ImageObserver.ALLBITS;
767 }
768
769 ToolkitImage tkimg = (ToolkitImage)img;
770 int repbits;
771 if (w == 0 || h == 0) {
772 repbits = ImageObserver.ALLBITS;
773 } else {
774 repbits = tkimg.getImageRep().check(o);
775 }
776 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
777 }
778
779 @Override
780 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
781 if (w == 0 || h == 0) {
782 return true;
783 }
784
785 // Must be a ToolkitImage
786 if (!(img instanceof ToolkitImage)) {
787 return true;
788 }
789
790 ToolkitImage tkimg = (ToolkitImage)img;
791 if (tkimg.hasError()) {
792 if (o != null) {
793 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
794 -1, -1, -1, -1);
795 }
796 return false;
797 }
798 ImageRepresentation ir = tkimg.getImageRep();
799 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
800 }
801
802 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
803 ToolkitImage rvImage = getResolutionVariant(img);
804 int rvw = getRVSize(w);
805 int rvh = getRVSize(h);
806 // Ignore the resolution variant in case of error
807 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
808 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
809 getResolutionVariantObserver(
810 img, o, w, h, rvw, rvh, true));
811 }
812
813 private boolean prepareResolutionVariant(Image img, int w, int h,
814 ImageObserver o) {
815
816 ToolkitImage rvImage = getResolutionVariant(img);
817 int rvw = getRVSize(w);
818 int rvh = getRVSize(h);
819 // Ignore the resolution variant in case of error
820 return rvImage == null || rvImage.hasError() || prepareImage(
821 rvImage, rvw, rvh,
822 MultiResolutionToolkitImage.getResolutionVariantObserver(
823 img, o, w, h, rvw, rvh, true));
824 }
825
826 private static int getRVSize(int size){
827 return size == -1 ? -1 : 2 * size;
828 }
829
830 private static ToolkitImage getResolutionVariant(Image image) {
831 if (image instanceof MultiResolutionToolkitImage) {
832 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
833 getResolutionVariant();
834 if (resolutionVariant instanceof ToolkitImage) {
835 return (ToolkitImage) resolutionVariant;
836 }
837 }
838 return null;
839 }
840
841 protected static boolean imageCached(Object key) {
842 return imgCache.containsKey(key);
843 }
844
845 protected static boolean imageExists(String filename) {
846 if (filename == null) {
847 return false;
848 }
849 checkPermissions(filename);
850 return filename != null && new File(filename).exists();
851 }
852
853 @SuppressWarnings("try")
854 protected static boolean imageExists(URL url) {
855 if (url == null) {
856 return false;
857 }
858 checkPermissions(url);
859 if (url != null) {
860 try (InputStream is = url.openStream()) {
861 return true;
862 }catch(IOException e){
863 return false;
864 }
865 }
866 return false;
867 }
868
869 private static void checkPermissions(String filename) {
870 SecurityManager security = System.getSecurityManager();
871 if (security != null) {
872 security.checkRead(filename);
873 }
874 }
875
876 private static void checkPermissions(URL url) {
877 SecurityManager sm = System.getSecurityManager();
878 if (sm != null) {
879 try {
880 java.security.Permission perm =
881 url.openConnection().getPermission();
882 if (perm != null) {
883 try {
884 sm.checkPermission(perm);
885 } catch (SecurityException se) {
886 // fallback to checkRead/checkConnect for pre 1.2
887 // security managers
888 if ((perm instanceof java.io.FilePermission) &&
889 perm.getActions().indexOf("read") != -1) {
890 sm.checkRead(perm.getName());
891 } else if ((perm instanceof
892 java.net.SocketPermission) &&
893 perm.getActions().indexOf("connect") != -1) {
894 sm.checkConnect(url.getHost(), url.getPort());
895 } else {
896 throw se;
897 }
898 }
899 }
900 } catch (java.io.IOException ioe) {
901 sm.checkConnect(url.getHost(), url.getPort());
902 }
903 }
904 }
905
906 /**
907 * Scans {@code imageList} for best-looking image of specified dimensions.
908 * Image can be scaled and/or padded with transparency.
909 */
910 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
911 if (width == 0 || height == 0) {
912 return null;
913 }
914 Image bestImage = null;
915 int bestWidth = 0;
916 int bestHeight = 0;
917 double bestSimilarity = 3; //Impossibly high value
918 double bestScaleFactor = 0;
919 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
920 //Iterate imageList looking for best matching image.
921 //'Similarity' measure is defined as good scale factor and small insets.
922 //best possible similarity is 0 (no scale, no insets).
923 //It's found while the experiments that good-looking result is achieved
924 //with scale factors x1, x3/4, x2/3, xN, x1/N.
925 Image im = i.next();
926 if (im == null) {
927 continue;
928 }
929 if (im instanceof ToolkitImage) {
930 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
931 ir.reconstruct(ImageObserver.ALLBITS);
932 }
933 int iw;
934 int ih;
935 try {
936 iw = im.getWidth(null);
937 ih = im.getHeight(null);
938 } catch (Exception e){
939 continue;
940 }
941 if (iw > 0 && ih > 0) {
942 //Calc scale factor
943 double scaleFactor = Math.min((double)width / (double)iw,
944 (double)height / (double)ih);
945 //Calculate scaled image dimensions
946 //adjusting scale factor to nearest "good" value
947 int adjw = 0;
948 int adjh = 0;
949 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
950 if (scaleFactor >= 2) {
951 //Need to enlarge image more than twice
952 //Round down scale factor to multiply by integer value
953 scaleFactor = Math.floor(scaleFactor);
954 adjw = iw * (int)scaleFactor;
955 adjh = ih * (int)scaleFactor;
956 scaleMeasure = 1.0 - 0.5 / scaleFactor;
957 } else if (scaleFactor >= 1) {
958 //Don't scale
959 scaleFactor = 1.0;
960 adjw = iw;
961 adjh = ih;
962 scaleMeasure = 0;
963 } else if (scaleFactor >= 0.75) {
964 //Multiply by 3/4
965 scaleFactor = 0.75;
966 adjw = iw * 3 / 4;
967 adjh = ih * 3 / 4;
968 scaleMeasure = 0.3;
969 } else if (scaleFactor >= 0.6666) {
970 //Multiply by 2/3
971 scaleFactor = 0.6666;
972 adjw = iw * 2 / 3;
973 adjh = ih * 2 / 3;
974 scaleMeasure = 0.33;
975 } else {
976 //Multiply size by 1/scaleDivider
977 //where scaleDivider is minimum possible integer
978 //larger than 1/scaleFactor
979 double scaleDivider = Math.ceil(1.0 / scaleFactor);
980 scaleFactor = 1.0 / scaleDivider;
981 adjw = (int)Math.round((double)iw / scaleDivider);
982 adjh = (int)Math.round((double)ih / scaleDivider);
983 scaleMeasure = 1.0 - 1.0 / scaleDivider;
984 }
985 double similarity = ((double)width - (double)adjw) / (double)width +
986 ((double)height - (double)adjh) / (double)height + //Large padding is bad
987 scaleMeasure; //Large rescale is bad
988 if (similarity < bestSimilarity) {
989 bestSimilarity = similarity;
990 bestScaleFactor = scaleFactor;
991 bestImage = im;
992 bestWidth = adjw;
993 bestHeight = adjh;
994 }
995 if (similarity == 0) break;
996 }
997 }
998 if (bestImage == null) {
999 //No images were found, possibly all are broken
1000 return null;
1001 }
1002 BufferedImage bimage =
1003 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1004 Graphics2D g = bimage.createGraphics();
1005 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1006 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1007 try {
1008 int x = (width - bestWidth) / 2;
1009 int y = (height - bestHeight) / 2;
1010 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1011 } finally {
1012 g.dispose();
1013 }
1014 return bimage;
1015 }
1016
1017 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1018 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1019 if (bimage == null) {
1020 return null;
1021 }
1022 Raster raster = bimage.getRaster();
1023 DataBuffer buffer = raster.getDataBuffer();
1024 return (DataBufferInt)buffer;
1025 }
1026
1027 @Override
1028 protected EventQueue getSystemEventQueueImpl() {
1029 return getSystemEventQueueImplPP();
1030 }
1031
1032 // Package private implementation
1033 static EventQueue getSystemEventQueueImplPP() {
1034 return getSystemEventQueueImplPP(AppContext.getAppContext());
1035 }
1036
1037 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1038 EventQueue theEventQueue =
1039 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1040 return theEventQueue;
1041 }
1042
1043 /**
1044 * Give native peers the ability to query the native container
1045 * given a native component (eg the direct parent may be lightweight).
1046 */
1047 public static Container getNativeContainer(Component c) {
1048 return Toolkit.getNativeContainer(c);
1049 }
1050
1051 /**
1052 * Gives native peers the ability to query the closest HW component.
1053 * If the given component is heavyweight, then it returns this. Otherwise,
1054 * it goes one level up in the hierarchy and tests next component.
1055 */
1056 public static Component getHeavyweightComponent(Component c) {
1057 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1058 c = AWTAccessor.getComponentAccessor().getParent(c);
1059 }
1060 return c;
1061 }
1062
1063 /**
1064 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1065 */
1066 public int getFocusAcceleratorKeyMask() {
1067 return InputEvent.ALT_MASK;
1068 }
1069
1070 /**
1071 * Tests whether specified key modifiers mask can be used to enter a printable
1072 * character. This is a default implementation of this method, which reflects
1073 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1074 * characters from the extended character set (like euro sign or math symbols)
1075 */
1076 public boolean isPrintableCharacterModifiersMask(int mods) {
1077 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1078 }
1079
1080 /**
1081 * Returns whether popup is allowed to be shown above the task bar.
1082 * This is a default implementation of this method, which checks
1083 * corresponding security permission.
1084 */
1085 public boolean canPopupOverlapTaskBar() {
1086 boolean result = true;
1087 try {
1088 SecurityManager sm = System.getSecurityManager();
1089 if (sm != null) {
1090 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1091 }
1092 } catch (SecurityException se) {
1093 // There is no permission to show popups over the task bar
1094 result = false;
1095 }
1096 return result;
1097 }
1098
1099 /**
1100 * Returns a new input method window, with behavior as specified in
1101 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1102 * If the inputContext is not null, the window should return it from its
1103 * getInputContext() method. The window needs to implement
1104 * sun.awt.im.InputMethodWindow.
1105 * <p>
1106 * SunToolkit subclasses can override this method to return better input
1107 * method windows.
1108 */
1109 @Override
1110 public Window createInputMethodWindow(String title, InputContext context) {
1111 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1112 }
1113
1114 /**
1115 * Returns whether enableInputMethods should be set to true for peered
1116 * TextComponent instances on this platform. False by default.
1117 */
1118 @Override
1119 public boolean enableInputMethodsForTextComponent() {
1120 return false;
1121 }
1122
1123 private static Locale startupLocale = null;
1124
1125 /**
1126 * Returns the locale in which the runtime was started.
1127 */
1128 public static Locale getStartupLocale() {
1129 if (startupLocale == null) {
1130 String language, region, country, variant;
1131 language = AccessController.doPrivileged(
1132 new GetPropertyAction("user.language", "en"));
1133 // for compatibility, check for old user.region property
1134 region = AccessController.doPrivileged(
1135 new GetPropertyAction("user.region"));
1136 if (region != null) {
1137 // region can be of form country, country_variant, or _variant
1138 int i = region.indexOf('_');
1139 if (i >= 0) {
1140 country = region.substring(0, i);
1141 variant = region.substring(i + 1);
1142 } else {
1143 country = region;
1144 variant = "";
1145 }
1146 } else {
1147 country = AccessController.doPrivileged(
1148 new GetPropertyAction("user.country", ""));
1149 variant = AccessController.doPrivileged(
1150 new GetPropertyAction("user.variant", ""));
1151 }
1152 startupLocale = new Locale(language, country, variant);
1153 }
1154 return startupLocale;
1155 }
1156
1157 /**
1158 * Returns the default keyboard locale of the underlying operating system
1159 */
1160 @Override
1161 public Locale getDefaultKeyboardLocale() {
1162 return getStartupLocale();
1163 }
1164
1165 private static DefaultMouseInfoPeer mPeer = null;
1166
1167 @Override
1168 public synchronized MouseInfoPeer getMouseInfoPeer() {
1169 if (mPeer == null) {
1170 mPeer = new DefaultMouseInfoPeer();
1171 }
1172 return mPeer;
1173 }
1174
1175
1176 /**
1177 * Returns whether default toolkit needs the support of the xembed
1178 * from embedding host(if any).
1179 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1180 */
1181 public static boolean needsXEmbed() {
1182 String noxembed = AccessController.
1183 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1184 if ("true".equals(noxembed)) {
1185 return false;
1186 }
1187
1188 Toolkit tk = Toolkit.getDefaultToolkit();
1189 if (tk instanceof SunToolkit) {
1190 // SunToolkit descendants should override this method to specify
1191 // concrete behavior
1192 return ((SunToolkit)tk).needsXEmbedImpl();
1193 } else {
1194 // Non-SunToolkit doubtly might support XEmbed
1195 return false;
1196 }
1197 }
1198
1199 /**
1200 * Returns whether this toolkit needs the support of the xembed
1201 * from embedding host(if any).
1202 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1203 */
1204 protected boolean needsXEmbedImpl() {
1205 return false;
1206 }
1207
1208 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1209
1210 /**
1211 * Returns whether the XEmbed server feature is requested by
1212 * developer. If true, Toolkit should return an
1213 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1214 */
1215 protected final boolean isXEmbedServerRequested() {
1216 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1217 }
1218
1219 /**
1220 * Returns whether the modal exclusion API is supported by the current toolkit.
1221 * When it isn't supported, calling <code>setModalExcluded</code> has no
1222 * effect, and <code>isModalExcluded</code> returns false for all windows.
1223 *
1224 * @return true if modal exclusion is supported by the toolkit, false otherwise
1225 *
1226 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1227 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1228 *
1229 * @since 1.5
1230 */
1231 public static boolean isModalExcludedSupported()
1232 {
1233 Toolkit tk = Toolkit.getDefaultToolkit();
1234 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1235 }
1236 /*
1237 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1238 *
1239 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1240 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1241 *
1242 * @since 1.5
1243 */
1244 protected boolean isModalExcludedSupportedImpl()
1245 {
1246 return false;
1247 }
1248
1249 /*
1250 * Sets this window to be excluded from being modally blocked. When the
1251 * toolkit supports modal exclusion and this method is called, input
1252 * events, focus transfer and z-order will continue to work for the
1253 * window, it's owned windows and child components, even in the
1254 * presence of a modal dialog.
1255 * For details on which <code>Window</code>s are normally blocked
1256 * by modal dialog, see {@link java.awt.Dialog}.
1257 * Invoking this method when the modal exclusion API is not supported by
1258 * the current toolkit has no effect.
1259 * @param window Window to be marked as not modally blocked
1260 * @see java.awt.Dialog
1261 * @see java.awt.Dialog#setModal(boolean)
1262 * @see sun.awt.SunToolkit#isModalExcludedSupported
1263 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1264 */
1265 public static void setModalExcluded(Window window)
1266 {
1267 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1268 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1269 }
1270 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1271 }
1272
1273 /*
1274 * Returns whether the specified window is blocked by modal dialogs.
1275 * If the modal exclusion API isn't supported by the current toolkit,
1276 * it returns false for all windows.
1277 *
1278 * @param window Window to test for modal exclusion
1279 *
1280 * @return true if the window is modal excluded, false otherwise. If
1281 * the modal exclusion isn't supported by the current Toolkit, false
1282 * is returned
1283 *
1284 * @see sun.awt.SunToolkit#isModalExcludedSupported
1285 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1286 *
1287 * @since 1.5
1288 */
1289 public static boolean isModalExcluded(Window window)
1290 {
1291 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1292 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1293 }
1294 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1295 }
1296
1297 /**
1298 * Overridden in XToolkit and WToolkit
1299 */
1300 @Override
1301 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1302 return (modalityType == Dialog.ModalityType.MODELESS) ||
1303 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1304 }
1305
1306 /**
1307 * Overridden in XToolkit and WToolkit
1308 */
1309 @Override
1310 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1311 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1312 }
1313
1314 ///////////////////////////////////////////////////////////////////////////
1315 //
1316 // The following is used by the Java Plug-in to coordinate dialog modality
1317 // between containing applications (browsers, ActiveX containers etc) and
1318 // the AWT.
1319 //
1320 ///////////////////////////////////////////////////////////////////////////
1321
1322 private ModalityListenerList modalityListeners = new ModalityListenerList();
1323
1324 public void addModalityListener(ModalityListener listener) {
1325 modalityListeners.add(listener);
1326 }
1327
1328 public void removeModalityListener(ModalityListener listener) {
1329 modalityListeners.remove(listener);
1330 }
1331
1332 public void notifyModalityPushed(Dialog dialog) {
1333 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1334 }
1335
1336 public void notifyModalityPopped(Dialog dialog) {
1337 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1338 }
1339
1340 final void notifyModalityChange(int id, Dialog source) {
1341 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1342 ev.dispatch();
1343 }
1344
1345 static class ModalityListenerList implements ModalityListener {
1346
1347 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1348
1349 void add(ModalityListener listener) {
1350 listeners.addElement(listener);
1351 }
1352
1353 void remove(ModalityListener listener) {
1354 listeners.removeElement(listener);
1355 }
1356
1357 @Override
1358 public void modalityPushed(ModalityEvent ev) {
1359 Iterator<ModalityListener> it = listeners.iterator();
1360 while (it.hasNext()) {
1361 it.next().modalityPushed(ev);
1362 }
1363 }
1364
1365 @Override
1366 public void modalityPopped(ModalityEvent ev) {
1367 Iterator<ModalityListener> it = listeners.iterator();
1368 while (it.hasNext()) {
1369 it.next().modalityPopped(ev);
1370 }
1371 }
1372 } // end of class ModalityListenerList
1373
1374 ///////////////////////////////////////////////////////////////////////////
1375 // End Plug-in code
1376 ///////////////////////////////////////////////////////////////////////////
1377
1378 public static boolean isLightweightOrUnknown(Component comp) {
1379 if (comp.isLightweight()
1380 || !(getDefaultToolkit() instanceof SunToolkit))
1381 {
1382 return true;
1383 }
1384 return !(comp instanceof Button
1385 || comp instanceof Canvas
1386 || comp instanceof Checkbox
1387 || comp instanceof Choice
1388 || comp instanceof Label
1389 || comp instanceof java.awt.List
1390 || comp instanceof Panel
1391 || comp instanceof Scrollbar
1392 || comp instanceof ScrollPane
1393 || comp instanceof TextArea
1394 || comp instanceof TextField
1395 || comp instanceof Window);
1396 }
1397
1398 @SuppressWarnings("serial")
1399 public static class OperationTimedOut extends RuntimeException {
1400 public OperationTimedOut(String msg) {
1401 super(msg);
1402 }
1403 public OperationTimedOut() {
1404 }
1405 }
1406
1407 @SuppressWarnings("serial")
1408 public static class InfiniteLoop extends RuntimeException {
1409 }
1410
1411 @SuppressWarnings("serial")
1412 public static class IllegalThreadException extends RuntimeException {
1413 public IllegalThreadException(String msg) {
1414 super(msg);
1415 }
1416 public IllegalThreadException() {
1417 }
1418 }
1419
1420 public static final int DEFAULT_WAIT_TIME = 10000;
1421 private static final int MAX_ITERS = 20;
1422 private static final int MIN_ITERS = 0;
1423 private static final int MINIMAL_EDELAY = 0;
1424
1425 /**
1426 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1427 */
1428 public void realSync() throws OperationTimedOut, InfiniteLoop {
1429 realSync(DEFAULT_WAIT_TIME);
1430 }
1431
1432 /**
1433 * Forces toolkit to synchronize with the native windowing
1434 * sub-system, flushing all pending work and waiting for all the
1435 * events to be processed. This method guarantees that after
1436 * return no additional Java events will be generated, unless
1437 * cause by user. Obviously, the method cannot be used on the
1438 * event dispatch thread (EDT). In case it nevertheless gets
1439 * invoked on this thread, the method throws the
1440 * IllegalThreadException runtime exception.
1441 *
1442 * <p> This method allows to write tests without explicit timeouts
1443 * or wait for some event. Example:
1444 * <code>
1445 * Frame f = ...;
1446 * f.setVisible(true);
1447 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1448 * </code>
1449 *
1450 * <p> After realSync, <code>f</code> will be completely visible
1451 * on the screen, its getLocationOnScreen will be returning the
1452 * right result and it will be the focus owner.
1453 *
1454 * <p> Another example:
1455 * <code>
1456 * b.requestFocus();
1457 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1458 * </code>
1459 *
1460 * <p> After realSync, <code>b</code> will be focus owner.
1461 *
1462 * <p> Notice that realSync isn't guaranteed to work if recurring
1463 * actions occur, such as if during processing of some event
1464 * another request which may generate some events occurs. By
1465 * default, sync tries to perform as much as {@value MAX_ITERS}
1466 * cycles of event processing, allowing for roughly {@value
1467 * MAX_ITERS} additional requests.
1468 *
1469 * <p> For example, requestFocus() generates native request, which
1470 * generates one or two Java focus events, which then generate a
1471 * serie of paint events, a serie of Java focus events, which then
1472 * generate a serie of paint events which then are processed -
1473 * three cycles, minimum.
1474 *
1475 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1476 */
1477 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1478 {
1479 if (EventQueue.isDispatchThread()) {
1480 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1481 }
1482 int bigLoop = 0;
1483 do {
1484 // Let's do sync first
1485 sync();
1486
1487 // During the wait process, when we were processing incoming
1488 // events, we could have made some new request, which can
1489 // generate new events. Example: MapNotify/XSetInputFocus.
1490 // Therefore, we dispatch them as long as there is something
1491 // to dispatch.
1492 int iters = 0;
1493 while (iters < MIN_ITERS) {
1494 syncNativeQueue(timeout);
1495 iters++;
1496 }
1497 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1498 iters++;
1499 }
1500 if (iters >= MAX_ITERS) {
1501 throw new InfiniteLoop();
1502 }
1503
1504 // native requests were dispatched by X/Window Manager or Windows
1505 // Moreover, we processed them all on Toolkit thread
1506 // Now wait while EDT processes them.
1507 //
1508 // During processing of some events (focus, for example),
1509 // some other events could have been generated. So, after
1510 // waitForIdle, we may end up with full EventQueue
1511 iters = 0;
1512 while (iters < MIN_ITERS) {
1513 waitForIdle(timeout);
1514 iters++;
1515 }
1516 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1517 iters++;
1518 }
1519 if (iters >= MAX_ITERS) {
1520 throw new InfiniteLoop();
1521 }
1522
1523 bigLoop++;
1524 // Again, for Java events, it was simple to check for new Java
1525 // events by checking event queue, but what if Java events
1526 // resulted in native requests? Therefor, check native events again.
1527 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1528 }
1529
1530 /**
1531 * Platform toolkits need to implement this method to perform the
1532 * sync of the native queue. The method should wait until native
1533 * requests are processed, all native events are processed and
1534 * corresponding Java events are generated. Should return
1535 * <code>true</code> if some events were processed,
1536 * <code>false</code> otherwise.
1537 */
1538 protected abstract boolean syncNativeQueue(final long timeout);
1539
1540 private boolean eventDispatched = false;
1541 private boolean queueEmpty = false;
1542 private final Object waitLock = "Wait Lock";
1543
1544 private boolean isEQEmpty() {
1545 EventQueue queue = getSystemEventQueueImpl();
1546 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1547 }
1548
1549 /**
1550 * Waits for the Java event queue to empty. Ensures that all
1551 * events are processed (including paint events), and that if
1552 * recursive events were generated, they are also processed.
1553 * Should return <code>true</code> if more processing is
1554 * necessary, <code>false</code> otherwise.
1555 */
1556 @SuppressWarnings("serial")
1557 protected final boolean waitForIdle(final long timeout) {
1558 flushPendingEvents();
1559 boolean queueWasEmpty = isEQEmpty();
1560 queueEmpty = false;
1561 eventDispatched = false;
1562 synchronized(waitLock) {
1563 postEvent(AppContext.getAppContext(),
1564 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1565 @Override
1566 public void dispatch() {
1567 // Here we block EDT. It could have some
1568 // events, it should have dispatched them by
1569 // now. So native requests could have been
1570 // generated. First, dispatch them. Then,
1571 // flush Java events again.
1572 int iters = 0;
1573 while (iters < MIN_ITERS) {
1574 syncNativeQueue(timeout);
1575 iters++;
1576 }
1577 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1578 iters++;
1579 }
1580 flushPendingEvents();
1581
1582 synchronized(waitLock) {
1583 queueEmpty = isEQEmpty();
1584 eventDispatched = true;
1585 waitLock.notifyAll();
1586 }
1587 }
1588 });
1589 try {
1590 while (!eventDispatched) {
1591 waitLock.wait();
1592 }
1593 } catch (InterruptedException ie) {
1594 return false;
1595 }
1596 }
1597
1598 try {
1599 Thread.sleep(MINIMAL_EDELAY);
1600 } catch (InterruptedException ie) {
1601 throw new RuntimeException("Interrupted");
1602 }
1603
1604 flushPendingEvents();
1605
1606 // Lock to force write-cache flush for queueEmpty.
1607 synchronized (waitLock) {
1608 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1609 }
1610 }
1611
1612 /**
1613 * Grabs the mouse input for the given window. The window must be
1614 * visible. The window or its children do not receive any
1615 * additional mouse events besides those targeted to them. All
1616 * other events will be dispatched as before - to the respective
1617 * targets. This Window will receive UngrabEvent when automatic
1618 * ungrab is about to happen. The event can be listened to by
1619 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1620 * UngrabEvent class for the list of conditions when ungrab is
1621 * about to happen.
1622 * @see UngrabEvent
1623 */
1624 public abstract void grab(Window w);
1625
1626 /**
1627 * Forces ungrab. No event will be sent.
1628 */
1629 public abstract void ungrab(Window w);
1630
1631
1632 /**
1633 * Locates the splash screen library in a platform dependent way and closes
1634 * the splash screen. Should be invoked on first top-level frame display.
1635 * @see java.awt.SplashScreen
1636 * @since 1.6
1637 */
1638 public static native void closeSplashScreen();
1639
1640 /* The following methods and variables are to support retrieving
1641 * desktop text anti-aliasing settings
1642 */
1643
1644 /* Need an instance method because setDesktopProperty(..) is protected. */
1645 private void fireDesktopFontPropertyChanges() {
1646 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1647 SunToolkit.getDesktopFontHints());
1648 }
1649
1650 private static boolean checkedSystemAAFontSettings;
1651 private static boolean useSystemAAFontSettings;
1652 private static boolean lastExtraCondition = true;
1653 private static RenderingHints desktopFontHints;
1654
1655 /* Since Swing is the reason for this "extra condition" logic its
1656 * worth documenting it in some detail.
1657 * First, a goal is for Swing and applications to both retrieve and
1658 * use the same desktop property value so that there is complete
1659 * consistency between the settings used by JDK's Swing implementation
1660 * and 3rd party custom Swing components, custom L&Fs and any general
1661 * text rendering that wants to be consistent with these.
1662 * But by default on Solaris & Linux Swing will not use AA text over
1663 * remote X11 display (unless Xrender can be used which is TBD and may not
1664 * always be available anyway) as that is a noticeable performance hit.
1665 * So there needs to be a way to express that extra condition so that
1666 * it is seen by all clients of the desktop property API.
1667 * If this were the only condition it could be handled here as it would
1668 * be the same for any L&F and could reasonably be considered to be
1669 * a static behaviour of those systems.
1670 * But GTK currently has an additional test based on locale which is
1671 * not applied by Metal. So mixing GTK in a few locales with Metal
1672 * would mean the last one wins.
1673 * This could be stored per-app context which would work
1674 * for different applets, but wouldn't help for a single application
1675 * using GTK and some other L&F concurrently.
1676 * But it is expected this will be addressed within GTK and the font
1677 * system so is a temporary and somewhat unlikely harmless corner case.
1678 */
1679 public static void setAAFontSettingsCondition(boolean extraCondition) {
1680 if (extraCondition != lastExtraCondition) {
1681 lastExtraCondition = extraCondition;
1682 if (checkedSystemAAFontSettings) {
1683 /* Someone already asked for this info, under a different
1684 * condition.
1685 * We'll force re-evaluation instead of replicating the
1686 * logic, then notify any listeners of any change.
1687 */
1688 checkedSystemAAFontSettings = false;
1689 Toolkit tk = Toolkit.getDefaultToolkit();
1690 if (tk instanceof SunToolkit) {
1691 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1692 }
1693 }
1694 }
1695 }
1696
1697 /* "false", "off", ""default" aren't explicitly tested, they
1698 * just fall through to produce a null return which all are equated to
1699 * "false".
1700 */
1701 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1702 Object aaHint = null;
1703 hintname = hintname.toLowerCase(Locale.ENGLISH);
1704 if (hintname.equals("on")) {
1705 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1706 } else if (hintname.equals("gasp")) {
1707 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1708 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1709 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1710 } else if (hintname.equals("lcd_hbgr")) {
1711 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1712 } else if (hintname.equals("lcd_vrgb")) {
1713 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1714 } else if (hintname.equals("lcd_vbgr")) {
1715 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1716 }
1717 if (aaHint != null) {
1718 RenderingHints map = new RenderingHints(null);
1719 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1720 return map;
1721 } else {
1722 return null;
1723 }
1724 }
1725
1726 /* This method determines whether to use the system font settings,
1727 * or ignore them if a L&F has specified they should be ignored, or
1728 * to override both of these with a system property specified value.
1729 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1730 * system property isn't applied as desktop properties are considered
1731 * to be inapplicable in that case. In that headless case although
1732 * this method will return "true" the toolkit will return a null map.
1733 */
1734 private static boolean useSystemAAFontSettings() {
1735 if (!checkedSystemAAFontSettings) {
1736 useSystemAAFontSettings = true; /* initially set this true */
1737 String systemAAFonts = null;
1738 Toolkit tk = Toolkit.getDefaultToolkit();
1739 if (tk instanceof SunToolkit) {
1740 systemAAFonts =
1741 AccessController.doPrivileged(
1742 new GetPropertyAction("awt.useSystemAAFontSettings"));
1743 }
1744 if (systemAAFonts != null) {
1745 useSystemAAFontSettings =
1746 Boolean.valueOf(systemAAFonts).booleanValue();
1747 /* If it is anything other than "true", then it may be
1748 * a hint name , or it may be "off, "default", etc.
1749 */
1750 if (!useSystemAAFontSettings) {
1751 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1752 }
1753 }
1754 /* If its still true, apply the extra condition */
1755 if (useSystemAAFontSettings) {
1756 useSystemAAFontSettings = lastExtraCondition;
1757 }
1758 checkedSystemAAFontSettings = true;
1759 }
1760 return useSystemAAFontSettings;
1761 }
1762
1763 /* A variable defined for the convenience of JDK code */
1764 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1765
1766 /* Overridden by subclasses to return platform/desktop specific values */
1767 protected RenderingHints getDesktopAAHints() {
1768 return null;
1769 }
1770
1771 /* Subclass desktop property loading methods call this which
1772 * in turn calls the appropriate subclass implementation of
1773 * getDesktopAAHints() when system settings are being used.
1774 * Its public rather than protected because subclasses may delegate
1775 * to a helper class.
1776 */
1777 public static RenderingHints getDesktopFontHints() {
1778 if (useSystemAAFontSettings()) {
1779 Toolkit tk = Toolkit.getDefaultToolkit();
1780 if (tk instanceof SunToolkit) {
1781 Object map = ((SunToolkit)tk).getDesktopAAHints();
1782 return (RenderingHints)map;
1783 } else { /* Headless Toolkit */
1784 return null;
1785 }
1786 } else if (desktopFontHints != null) {
1787 /* cloning not necessary as the return value is cloned later, but
1788 * its harmless.
1789 */
1790 return (RenderingHints)(desktopFontHints.clone());
1791 } else {
1792 return null;
1793 }
1794 }
1795
1796
1797 public abstract boolean isDesktopSupported();
1798
1799 /*
1800 * consumeNextKeyTyped() method is not currently used,
1801 * however Swing could use it in the future.
1802 */
1803 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1804 try {
1805 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1806 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1807 getCurrentKeyboardFocusManager(),
1808 keyEvent);
1809 } catch (ClassCastException cce) {
1810 cce.printStackTrace();
1811 }
1812 }
1813
1814 protected static void dumpPeers(final PlatformLogger aLog) {
1815 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1816 }
1817
1818 /**
1819 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1820 * @return Window ancestor of the component or component by itself if it is Window;
1821 * null, if component is not a part of window hierarchy
1822 */
1823 public static Window getContainingWindow(Component comp) {
1824 while (comp != null && !(comp instanceof Window)) {
1825 comp = comp.getParent();
1826 }
1827 return (Window)comp;
1828 }
1829
1830 private static Boolean sunAwtDisableMixing = null;
1831
1832 /**
1833 * Returns the value of "sun.awt.disableMixing" property. Default
1834 * value is {@code false}.
1835 */
1836 public synchronized static boolean getSunAwtDisableMixing() {
1837 if (sunAwtDisableMixing == null) {
1838 sunAwtDisableMixing = AccessController.doPrivileged(
1839 new GetBooleanAction("sun.awt.disableMixing"));
1840 }
1841 return sunAwtDisableMixing.booleanValue();
1842 }
1843
1844 /**
1845 * Returns true if the native GTK libraries are available. The
1846 * default implementation returns false, but UNIXToolkit overrides this
1847 * method to provide a more specific answer.
1848 */
1849 public boolean isNativeGTKAvailable() {
1850 return false;
1851 }
1852
1853 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1854
1855 public synchronized void setWindowDeactivationTime(Window w, long time) {
1856 AppContext ctx = getAppContext(w);
1857 if (ctx == null) {
1858 return;
1859 }
1860 @SuppressWarnings("unchecked")
1861 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1862 if (map == null) {
1863 map = new WeakHashMap<Window, Long>();
1864 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1865 }
1866 map.put(w, time);
1867 }
1868
1869 public synchronized long getWindowDeactivationTime(Window w) {
1870 AppContext ctx = getAppContext(w);
1871 if (ctx == null) {
1872 return -1;
1873 }
1874 @SuppressWarnings("unchecked")
1875 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1876 if (map == null) {
1877 return -1;
1878 }
1879 Long time = map.get(w);
1880 return time == null ? -1 : time;
1881 }
1882
1883 // Cosntant alpha
1884 public boolean isWindowOpacitySupported() {
1885 return false;
1886 }
1887
1888 // Shaping
1889 public boolean isWindowShapingSupported() {
1890 return false;
1891 }
1892
1893 // Per-pixel alpha
1894 public boolean isWindowTranslucencySupported() {
1895 return false;
1896 }
1897
1898 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1899 return false;
1900 }
1901
1902 /**
1903 * Returns true if swing backbuffer should be translucent.
1904 */
1905 public boolean isSwingBackbufferTranslucencySupported() {
1906 return false;
1907 }
1908
1909 /**
1910 * Returns whether or not a containing top level window for the passed
1911 * component is
1912 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1913 *
1914 * @param c a Component which toplevel's to check
1915 * @return {@code true} if the passed component is not null and has a
1916 * containing toplevel window which is opaque (so per-pixel translucency
1917 * is not enabled), {@code false} otherwise
1918 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1919 */
1920 public static boolean isContainingTopLevelOpaque(Component c) {
1921 Window w = getContainingWindow(c);
1922 return w != null && w.isOpaque();
1923 }
1924
1925 /**
1926 * Returns whether or not a containing top level window for the passed
1927 * component is
1928 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1929 *
1930 * @param c a Component which toplevel's to check
1931 * @return {@code true} if the passed component is not null and has a
1932 * containing toplevel window which has opacity less than
1933 * 1.0f (which means that it is translucent), {@code false} otherwise
1934 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1935 */
1936 public static boolean isContainingTopLevelTranslucent(Component c) {
1937 Window w = getContainingWindow(c);
1938 return w != null && w.getOpacity() < 1.0f;
1939 }
1940
1941 /**
1942 * Returns whether the native system requires using the peer.updateWindow()
1943 * method to update the contents of a non-opaque window, or if usual
1944 * painting procedures are sufficient. The default return value covers
1945 * the X11 systems. On MS Windows this method is overriden in WToolkit
1946 * to return true.
1947 */
1948 public boolean needUpdateWindow() {
1949 return false;
1950 }
1951
1952 /**
1953 * Descendants of the SunToolkit should override and put their own logic here.
1954 */
1955 public int getNumberOfButtons(){
1956 return 3;
1957 }
1958
1959 /**
1960 * Checks that the given object implements/extends the given
1961 * interface/class.
1962 *
1963 * Note that using the instanceof operator causes a class to be loaded.
1964 * Using this method doesn't load a class and it can be used instead of
1965 * the instanceof operator for performance reasons.
1966 *
1967 * @param obj Object to be checked
1968 * @param type The name of the interface/class. Must be
1969 * fully-qualified interface/class name.
1970 * @return true, if this object implements/extends the given
1971 * interface/class, false, otherwise, or if obj or type is null
1972 */
1973 public static boolean isInstanceOf(Object obj, String type) {
1974 if (obj == null) return false;
1975 if (type == null) return false;
1976
1977 return isInstanceOf(obj.getClass(), type);
1978 }
1979
1980 private static boolean isInstanceOf(Class<?> cls, String type) {
1981 if (cls == null) return false;
1982
1983 if (cls.getName().equals(type)) {
1984 return true;
1985 }
1986
1987 for (Class<?> c : cls.getInterfaces()) {
1988 if (c.getName().equals(type)) {
1989 return true;
1990 }
1991 }
1992 return isInstanceOf(cls.getSuperclass(), type);
1993 }
1994
1995 protected static LightweightFrame getLightweightFrame(Component c) {
1996 for (; c != null; c = c.getParent()) {
1997 if (c instanceof LightweightFrame) {
1998 return (LightweightFrame)c;
1999 }
2000 if (c instanceof Window) {
2001 // Don't traverse owner windows
2002 return null;
2003 }
2004 }
2005 return null;
2006 }
2007
2008 ///////////////////////////////////////////////////////////////////////////
2009 //
2010 // The following methods help set and identify whether a particular
2011 // AWTEvent object was produced by the system or by user code. As of this
2012 // writing the only consumer is the Java Plug-In, although this information
2013 // could be useful to more clients and probably should be formalized in
2014 // the public API.
2015 //
2016 ///////////////////////////////////////////////////////////////////////////
2017
2018 public static void setSystemGenerated(AWTEvent e) {
2019 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2020 }
2021
2022 public static boolean isSystemGenerated(AWTEvent e) {
2023 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2024 }
2025
2026 } // class SunToolkit
2027
2028
2029 /*
2030 * PostEventQueue is a Thread that runs in the same AppContext as the
2031 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2032 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2033 * events to this queue, which then calls EventQueue.postEvent().
2034 *
2035 * We do this because EventQueue.postEvent() may be overridden by client
2036 * code, and we mustn't ever call client code from the toolkit thread.
2037 */
2038 class PostEventQueue {
2039 private EventQueueItem queueHead = null;
2040 private EventQueueItem queueTail = null;
2041 private final EventQueue eventQueue;
2042
2043 private Thread flushThread = null;
2044
2045 PostEventQueue(EventQueue eq) {
2046 eventQueue = eq;
2047 }
2048
2049 /*
2050 * Continually post pending AWTEvents to the Java EventQueue. The method
2051 * is synchronized to ensure the flush is completed before a new event
2052 * can be posted to this queue.
2053 *
2054 * 7177040: The method couldn't be wholly synchronized because of calls
2055 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2056 * potentially lead to deadlock
2057 */
2058 public void flush() {
2059
2060 Thread newThread = Thread.currentThread();
2061
2062 try {
2063 EventQueueItem tempQueue;
2064 synchronized (this) {
2065 // Avoid method recursion
2066 if (newThread == flushThread) {
2067 return;
2068 }
2069 // Wait for other threads' flushing
2070 while (flushThread != null) {
2071 wait();
2072 }
2073 // Skip everything if queue is empty
2074 if (queueHead == null) {
2075 return;
2076 }
2077 // Remember flushing thread
2078 flushThread = newThread;
2079
2080 tempQueue = queueHead;
2081 queueHead = queueTail = null;
2082 }
2083 try {
2084 while (tempQueue != null) {
2085 eventQueue.postEvent(tempQueue.event);
2086 tempQueue = tempQueue.next;
2087 }
2088 }
2089 finally {
2090 // Only the flushing thread can get here
2091 synchronized (this) {
2092 // Forget flushing thread, inform other pending threads
2093 flushThread = null;
2094 notifyAll();
2095 }
2096 }
2097 }
2098 catch (InterruptedException e) {
2099 // Couldn't allow exception go up, so at least recover the flag
2100 newThread.interrupt();
2101 }
2102 }
2103
2104 /*
2105 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2106 */
2107 void postEvent(AWTEvent event) {
2108 EventQueueItem item = new EventQueueItem(event);
2109
2110 synchronized (this) {
2111 if (queueHead == null) {
2112 queueHead = queueTail = item;
2113 } else {
2114 queueTail.next = item;
2115 queueTail = item;
2116 }
2117 }
2118 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2119 }
2120 } // class PostEventQueue