1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import java.awt.event.InputEvent;
30 import java.awt.event.KeyEvent;
31 import java.awt.event.WindowEvent;
32 import java.awt.image.BufferedImage;
33 import java.awt.image.DataBuffer;
34 import java.awt.image.DataBufferInt;
35 import java.awt.image.ImageObserver;
36 import java.awt.image.ImageProducer;
37 import java.awt.image.Raster;
38 import java.awt.peer.FramePeer;
39 import java.awt.peer.KeyboardFocusManagerPeer;
40 import java.awt.peer.MouseInfoPeer;
41 import java.awt.peer.SystemTrayPeer;
42 import java.awt.peer.TrayIconPeer;
43 import java.io.File;
44 import java.io.IOException;
45 import java.io.InputStream;
46 import java.lang.reflect.InvocationTargetException;
47 import java.net.URL;
48 import java.security.AccessController;
49 import java.util.ArrayList;
50 import java.util.Collections;
51 import java.util.Iterator;
52 import java.util.Locale;
53 import java.util.Map;
54 import java.util.Vector;
55 import java.util.WeakHashMap;
56 import java.util.concurrent.TimeUnit;
57 import java.util.concurrent.locks.Condition;
58 import java.util.concurrent.locks.ReentrantLock;
59 import java.util.LinkedList;
60 import sun.awt.im.InputContext;
61 import sun.awt.image.ByteArrayImageSource;
62 import sun.awt.image.FileImageSource;
63 import sun.awt.image.ImageRepresentation;
64 import java.awt.image.MultiResolutionImage;
65 import sun.awt.image.MultiResolutionToolkitImage;
66 import sun.awt.image.ToolkitImage;
67 import sun.awt.image.URLImageSource;
68 import sun.font.FontDesignMetrics;
69 import sun.net.util.URLUtil;
70 import sun.security.action.GetBooleanAction;
71 import sun.security.action.GetPropertyAction;
72 import sun.util.logging.PlatformLogger;
73
74 import static java.awt.RenderingHints.*;
75
76 public abstract class SunToolkit extends Toolkit
77 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
78
79 // 8014718: logging has been removed from SunToolkit
80
81 /* Load debug settings for native code */
82 static {
83 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
84 DebugSettings.init();
85 }
86 };
87
88 /**
89 * Special mask for the UngrabEvent events, in addition to the
90 * public masks defined in AWTEvent. Should be used as the mask
91 * value for Toolkit.addAWTEventListener.
92 */
93 public static final int GRAB_EVENT_MASK = 0x80000000;
94
95 /* The key to put()/get() the PostEventQueue into/from the AppContext.
96 */
97 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
98
99 /**
100 * Number of buttons.
101 * By default it's taken from the system. If system value does not
102 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
103 */
104 protected static int numberOfButtons = 0;
105
106
107 /* XFree standard mention 24 buttons as maximum:
108 * http://www.xfree86.org/current/mouse.4.html
109 * We workaround systems supporting more than 24 buttons.
110 * Otherwise, we have to use long type values as masks
111 * which leads to API change.
112 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
113 * the 4-bytes limit for the int type. (CR 6799099)
114 * One more bit is reserved for FIRST_HIGH_BIT.
115 */
116 public static final int MAX_BUTTONS_SUPPORTED = 20;
117
118 /**
119 * Creates and initializes EventQueue instance for the specified
120 * AppContext.
121 * Note that event queue must be created from createNewAppContext()
122 * only in order to ensure that EventQueue constructor obtains
123 * the correct AppContext.
124 * @param appContext AppContext to associate with the event queue
125 */
126 private static void initEQ(AppContext appContext) {
127 EventQueue eventQueue = new EventQueue();
128 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
129
130 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
131 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
132 }
133
134 public SunToolkit() {
135 }
136
137 public boolean useBufferPerWindow() {
138 return false;
139 }
140
141 public abstract FramePeer createLightweightFrame(LightweightFrame target)
142 throws HeadlessException;
143
144 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
145 throws HeadlessException, AWTException;
146
147 public abstract SystemTrayPeer createSystemTray(SystemTray target);
148
149 public abstract boolean isTraySupported();
150
151 @Override
152 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
153 throws HeadlessException;
154
155 /**
156 * The AWT lock is typically only used on Unix platforms to synchronize
157 * access to Xlib, OpenGL, etc. However, these methods are implemented
158 * in SunToolkit so that they can be called from shared code (e.g.
159 * from the OGL pipeline) or from the X11 pipeline regardless of whether
160 * XToolkit or MToolkit is currently in use. There are native macros
161 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
162 * methods is changed, make sure it is compatible with the native macros.
163 *
164 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
165 * used in place of:
166 * synchronized (getAWTLock()) {
167 * ...
168 * }
169 *
170 * By factoring these methods out specially, we are able to change the
171 * implementation of these methods (e.g. use more advanced locking
172 * mechanisms) without impacting calling code.
173 *
174 * Sample usage:
175 * private void doStuffWithXlib() {
176 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
177 * SunToolkit.awtLock();
178 * try {
179 * ...
180 * XlibWrapper.XDoStuff();
181 * } finally {
182 * SunToolkit.awtUnlock();
183 * }
184 * }
185 */
186
187 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
188 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
189
190 public static final void awtLock() {
191 AWT_LOCK.lock();
192 }
193
194 public static final boolean awtTryLock() {
195 return AWT_LOCK.tryLock();
196 }
197
198 public static final void awtUnlock() {
199 AWT_LOCK.unlock();
200 }
201
202 public static final void awtLockWait()
203 throws InterruptedException
204 {
205 AWT_LOCK_COND.await();
206 }
207
208 public static final void awtLockWait(long timeout)
209 throws InterruptedException
210 {
211 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
212 }
213
214 public static final void awtLockNotify() {
215 AWT_LOCK_COND.signal();
216 }
217
218 public static final void awtLockNotifyAll() {
219 AWT_LOCK_COND.signalAll();
220 }
221
222 public static final boolean isAWTLockHeldByCurrentThread() {
223 return AWT_LOCK.isHeldByCurrentThread();
224 }
225
226 /*
227 * Create a new AppContext, along with its EventQueue, for a
228 * new ThreadGroup. Browser code, for example, would use this
229 * method to create an AppContext & EventQueue for an Applet.
230 */
231 public static AppContext createNewAppContext() {
232 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
233 return createNewAppContext(threadGroup);
234 }
235
236 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
237 // Create appContext before initialization of EventQueue, so all
238 // the calls to AppContext.getAppContext() from EventQueue ctor
239 // return correct values
240 AppContext appContext = new AppContext(threadGroup);
241 initEQ(appContext);
242
243 return appContext;
244 }
245
246 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
247 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
248 }
249
250 /*
251 * Fetch the peer associated with the given target (as specified
252 * in the peer creation method). This can be used to determine
253 * things like what the parent peer is. If the target is null
254 * or the target can't be found (either because the a peer was
255 * never created for it or the peer was disposed), a null will
256 * be returned.
257 */
258 protected static Object targetToPeer(Object target) {
259 if (target != null && !GraphicsEnvironment.isHeadless()) {
260 return AWTAutoShutdown.getInstance().getPeer(target);
261 }
262 return null;
263 }
264
265 protected static void targetCreatedPeer(Object target, Object peer) {
266 if (target != null && peer != null &&
267 !GraphicsEnvironment.isHeadless())
268 {
269 AWTAutoShutdown.getInstance().registerPeer(target, peer);
270 }
271 }
272
273 protected static void targetDisposedPeer(Object target, Object peer) {
274 if (target != null && peer != null &&
275 !GraphicsEnvironment.isHeadless())
276 {
277 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
278 }
279 }
280
281 // Maps from non-Component/MenuComponent to AppContext.
282 // WeakHashMap<Component,AppContext>
283 private static final Map<Object, AppContext> appContextMap =
284 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>());
285
286 /**
287 * Sets the appContext field of target. If target is not a Component or
288 * MenuComponent, this returns false.
289 */
290 private static boolean setAppContext(Object target,
291 AppContext context) {
292 if (target instanceof Component) {
293 AWTAccessor.getComponentAccessor().
294 setAppContext((Component)target, context);
295 } else if (target instanceof MenuComponent) {
296 AWTAccessor.getMenuComponentAccessor().
297 setAppContext((MenuComponent)target, context);
298 } else {
299 return false;
300 }
301 return true;
302 }
303
304 /**
305 * Returns the appContext field for target. If target is not a
306 * Component or MenuComponent this returns null.
307 */
308 private static AppContext getAppContext(Object target) {
309 if (target instanceof Component) {
310 return AWTAccessor.getComponentAccessor().
311 getAppContext((Component)target);
312 } else if (target instanceof MenuComponent) {
313 return AWTAccessor.getMenuComponentAccessor().
314 getAppContext((MenuComponent)target);
315 } else {
316 return null;
317 }
318 }
319
320 /*
321 * Fetch the AppContext associated with the given target.
322 * This can be used to determine things like which EventQueue
323 * to use for posting events to a Component. If the target is
324 * null or the target can't be found, a null with be returned.
325 */
326 public static AppContext targetToAppContext(Object target) {
327 if (target == null) {
328 return null;
329 }
330 AppContext context = getAppContext(target);
331 if (context == null) {
332 // target is not a Component/MenuComponent, try the
333 // appContextMap.
334 context = appContextMap.get(target);
335 }
336 return context;
337 }
338
339 /**
340 * Sets the synchronous status of focus requests on lightweight
341 * components in the specified window to the specified value.
342 * If the boolean parameter is {@code true} then the focus
343 * requests on lightweight components will be performed
344 * synchronously, if it is {@code false}, then asynchronously.
345 * By default, all windows have their lightweight request status
346 * set to asynchronous.
347 * <p>
348 * The application can only set the status of lightweight focus
349 * requests to synchronous for any of its windows if it doesn't
350 * perform focus transfers between different heavyweight containers.
351 * In this case the observable focus behaviour is the same as with
352 * asynchronous status.
353 * <p>
354 * If the application performs focus transfer between different
355 * heavyweight containers and sets the lightweight focus request
356 * status to synchronous for any of its windows, then further focus
357 * behaviour is unspecified.
358 * <p>
359 * @param changed the window for which the lightweight focus request
360 * status should be set
361 * @param status the value of lightweight focus request status
362 */
363
364 public static void setLWRequestStatus(Window changed,boolean status){
365 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
366 };
367
368 public static void checkAndSetPolicy(Container cont) {
369 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
370 getCurrentKeyboardFocusManager().
371 getDefaultFocusTraversalPolicy();
372
373 cont.setFocusTraversalPolicy(defaultPolicy);
374 }
375
376 private static FocusTraversalPolicy createLayoutPolicy() {
377 FocusTraversalPolicy policy = null;
378 try {
379 Class<?> layoutPolicyClass =
380 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
381 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
382 }
383 catch (ClassNotFoundException e) {
384 assert false;
385 }
386 catch (InstantiationException e) {
387 assert false;
388 }
389 catch (IllegalAccessException e) {
390 assert false;
391 }
392
393 return policy;
394 }
395
396 /*
397 * Insert a mapping from target to AppContext, for later retrieval
398 * via targetToAppContext() above.
399 */
400 public static void insertTargetMapping(Object target, AppContext appContext) {
401 if (!setAppContext(target, appContext)) {
402 // Target is not a Component/MenuComponent, use the private Map
403 // instead.
404 appContextMap.put(target, appContext);
405 }
406 }
407
408 /*
409 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
410 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
411 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
412 * not be called under another lock since it locks the EventQueue.
413 * See bugids 4632918, 4526597.
414 */
415 public static void postEvent(AppContext appContext, AWTEvent event) {
416 if (event == null) {
417 throw new NullPointerException();
418 }
419
420 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
421 if (sea != null && sea.isSequencedEvent(event)) {
422 AWTEvent nested = sea.getNested(event);
423 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
424 nested instanceof TimedWindowEvent)
425 {
426 TimedWindowEvent twe = (TimedWindowEvent)nested;
427 ((SunToolkit)Toolkit.getDefaultToolkit()).
428 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
429 }
430 }
431
432 // All events posted via this method are system-generated.
433 // Placing the following call here reduces considerably the
434 // number of places throughout the toolkit that would
435 // otherwise have to be modified to precisely identify
436 // system-generated events.
437 setSystemGenerated(event);
438 AppContext eventContext = targetToAppContext(event.getSource());
439 if (eventContext != null && !eventContext.equals(appContext)) {
440 throw new RuntimeException("Event posted on wrong app context : " + event);
441 }
442 PostEventQueue postEventQueue =
443 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
444 if (postEventQueue != null) {
445 postEventQueue.postEvent(event);
446 }
447 }
448
449 /*
450 * Post AWTEvent of high priority.
451 */
452 public static void postPriorityEvent(final AWTEvent e) {
453 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
454 @Override
455 public void run() {
456 AWTAccessor.getAWTEventAccessor().setPosted(e);
457 ((Component)e.getSource()).dispatchEvent(e);
458 }
459 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
460 postEvent(targetToAppContext(e.getSource()), pe);
461 }
462
463 /*
464 * Flush any pending events which haven't been posted to the AWT
465 * EventQueue yet.
466 */
467 public static void flushPendingEvents() {
468 AppContext appContext = AppContext.getAppContext();
469 flushPendingEvents(appContext);
470 }
471
472 /*
473 * Flush the PostEventQueue for the right AppContext.
474 * The default flushPendingEvents only flushes the thread-local context,
475 * which is not always correct, c.f. 3746956
476 */
477 public static void flushPendingEvents(AppContext appContext) {
478 PostEventQueue postEventQueue =
479 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
480 if (postEventQueue != null) {
481 postEventQueue.flush();
482 }
483 }
484
485 /*
486 * Execute a chunk of code on the Java event handler thread for the
487 * given target. Does not wait for the execution to occur before
488 * returning to the caller.
489 */
490 public static void executeOnEventHandlerThread(Object target,
491 Runnable runnable) {
492 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
493 }
494
495 /*
496 * Fixed 5064013: the InvocationEvent time should be equals
497 * the time of the ActionEvent
498 */
499 @SuppressWarnings("serial")
500 public static void executeOnEventHandlerThread(Object target,
501 Runnable runnable,
502 final long when) {
503 executeOnEventHandlerThread(
504 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
505 @Override
506 public long getWhen() {
507 return when;
508 }
509 });
510 }
511
512 /*
513 * Execute a chunk of code on the Java event handler thread for the
514 * given target. Does not wait for the execution to occur before
515 * returning to the caller.
516 */
517 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
518 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
519 }
520
521 /*
522 * Execute a chunk of code on the Java event handler thread. The
523 * method takes into account provided AppContext and sets
524 * {@code SunToolkit.getDefaultToolkit()} as a target of the
525 * event. See 6451487 for detailes.
526 * Does not wait for the execution to occur before returning to
527 * the caller.
528 */
529 public static void invokeLaterOnAppContext(
530 AppContext appContext, Runnable dispatcher)
531 {
532 postEvent(appContext,
533 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
534 PeerEvent.PRIORITY_EVENT));
535 }
536
537 /*
538 * Execute a chunk of code on the Java event handler thread for the
539 * given target. Waits for the execution to occur before returning
540 * to the caller.
541 */
542 public static void executeOnEDTAndWait(Object target, Runnable runnable)
543 throws InterruptedException, InvocationTargetException
544 {
545 if (EventQueue.isDispatchThread()) {
546 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
547 }
548
549 class AWTInvocationLock {}
550 Object lock = new AWTInvocationLock();
551
552 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
553
554 synchronized (lock) {
555 executeOnEventHandlerThread(event);
556 while(!event.isDispatched()) {
557 lock.wait();
558 }
559 }
560
561 Throwable eventThrowable = event.getThrowable();
562 if (eventThrowable != null) {
563 throw new InvocationTargetException(eventThrowable);
564 }
565 }
566
567 /*
568 * Returns true if the calling thread is the event dispatch thread
569 * contained within AppContext which associated with the given target.
570 * Use this call to ensure that a given task is being executed
571 * (or not being) on the event dispatch thread for the given target.
572 */
573 public static boolean isDispatchThreadForAppContext(Object target) {
574 AppContext appContext = targetToAppContext(target);
575 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
576
577 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
578 return accessor.isDispatchThreadImpl(eq);
579 }
580
581 @Override
582 public Dimension getScreenSize() {
583 return new Dimension(getScreenWidth(), getScreenHeight());
584 }
585 protected abstract int getScreenWidth();
586 protected abstract int getScreenHeight();
587
588 @Override
589 @SuppressWarnings("deprecation")
590 public FontMetrics getFontMetrics(Font font) {
591 return FontDesignMetrics.getMetrics(font);
592 }
593
594 @Override
595 @SuppressWarnings("deprecation")
596 public String[] getFontList() {
597 String[] hardwiredFontList = {
598 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
599 Font.DIALOG_INPUT
600
601 // -- Obsolete font names from 1.0.2. It was decided that
602 // -- getFontList should not return these old names:
603 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
604 };
605 return hardwiredFontList;
606 }
607
608 /**
609 * Disables erasing of background on the canvas before painting if
610 * this is supported by the current toolkit. It is recommended to
611 * call this method early, before the Canvas becomes displayable,
612 * because some Toolkit implementations do not support changing
613 * this property once the Canvas becomes displayable.
614 */
615 public void disableBackgroundErase(Canvas canvas) {
616 disableBackgroundEraseImpl(canvas);
617 }
618
619 /**
620 * Disables the native erasing of the background on the given
621 * component before painting if this is supported by the current
622 * toolkit. This only has an effect for certain components such as
623 * Canvas, Panel and Window. It is recommended to call this method
624 * early, before the Component becomes displayable, because some
625 * Toolkit implementations do not support changing this property
626 * once the Component becomes displayable.
627 */
628 public void disableBackgroundErase(Component component) {
629 disableBackgroundEraseImpl(component);
630 }
631
632 private void disableBackgroundEraseImpl(Component component) {
633 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
634 }
635
636 /**
637 * Returns the value of "sun.awt.noerasebackground" property. Default
638 * value is {@code false}.
639 */
640 public static boolean getSunAwtNoerasebackground() {
641 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
642 }
643
644 /**
645 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
646 * value is {@code false}.
647 */
648 public static boolean getSunAwtErasebackgroundonresize() {
649 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
650 }
651
652
653 @SuppressWarnings("deprecation")
654 static final SoftCache fileImgCache = new SoftCache();
655
656 @SuppressWarnings("deprecation")
657 static final SoftCache urlImgCache = new SoftCache();
658
659 static Image getImageFromHash(Toolkit tk, URL url) {
660 checkPermissions(url);
661 synchronized (urlImgCache) {
662 String key = url.toString();
663 Image img = (Image)urlImgCache.get(key);
664 if (img == null) {
665 try {
666 img = tk.createImage(new URLImageSource(url));
667 urlImgCache.put(key, img);
668 } catch (Exception e) {
669 }
670 }
671 return img;
672 }
673 }
674
675 static Image getImageFromHash(Toolkit tk,
676 String filename) {
677 checkPermissions(filename);
678 synchronized (fileImgCache) {
679 Image img = (Image)fileImgCache.get(filename);
680 if (img == null) {
681 try {
682 img = tk.createImage(new FileImageSource(filename));
683 fileImgCache.put(filename, img);
684 } catch (Exception e) {
685 }
686 }
687 return img;
688 }
689 }
690
691 @Override
692 public Image getImage(String filename) {
693 return getImageFromHash(this, filename);
694 }
695
696 @Override
697 public Image getImage(URL url) {
698 return getImageFromHash(this, url);
699 }
700
701 protected Image getImageWithResolutionVariant(String fileName,
702 String resolutionVariantName) {
703 synchronized (fileImgCache) {
704 Image image = getImageFromHash(this, fileName);
705 if (image instanceof MultiResolutionImage) {
706 return image;
707 }
708 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
709 image = createImageWithResolutionVariant(image, resolutionVariant);
710 fileImgCache.put(fileName, image);
711 return image;
712 }
713 }
714
715 protected Image getImageWithResolutionVariant(URL url,
716 URL resolutionVariantURL) {
717 synchronized (urlImgCache) {
718 Image image = getImageFromHash(this, url);
719 if (image instanceof MultiResolutionImage) {
720 return image;
721 }
722 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
723 image = createImageWithResolutionVariant(image, resolutionVariant);
724 String key = url.toString();
725 urlImgCache.put(key, image);
726 return image;
727 }
728 }
729
730
731 @Override
732 public Image createImage(String filename) {
733 checkPermissions(filename);
734 return createImage(new FileImageSource(filename));
735 }
736
737 @Override
738 public Image createImage(URL url) {
739 checkPermissions(url);
740 return createImage(new URLImageSource(url));
741 }
742
743 @Override
744 public Image createImage(byte[] data, int offset, int length) {
745 return createImage(new ByteArrayImageSource(data, offset, length));
746 }
747
748 @Override
749 public Image createImage(ImageProducer producer) {
750 return new ToolkitImage(producer);
751 }
752
753 public static Image createImageWithResolutionVariant(Image image,
754 Image resolutionVariant) {
755 return new MultiResolutionToolkitImage(image, resolutionVariant);
756 }
757
758 @Override
759 public int checkImage(Image img, int w, int h, ImageObserver o) {
760 if (!(img instanceof ToolkitImage)) {
761 return ImageObserver.ALLBITS;
762 }
763
764 ToolkitImage tkimg = (ToolkitImage)img;
765 int repbits;
766 if (w == 0 || h == 0) {
767 repbits = ImageObserver.ALLBITS;
768 } else {
769 repbits = tkimg.getImageRep().check(o);
770 }
771 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
772 }
773
774 @Override
775 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
776 if (w == 0 || h == 0) {
777 return true;
778 }
779
780 // Must be a ToolkitImage
781 if (!(img instanceof ToolkitImage)) {
782 return true;
783 }
784
785 ToolkitImage tkimg = (ToolkitImage)img;
786 if (tkimg.hasError()) {
787 if (o != null) {
788 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
789 -1, -1, -1, -1);
790 }
791 return false;
792 }
793 ImageRepresentation ir = tkimg.getImageRep();
794 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
795 }
796
797 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
798 ToolkitImage rvImage = getResolutionVariant(img);
799 int rvw = getRVSize(w);
800 int rvh = getRVSize(h);
801 // Ignore the resolution variant in case of error
802 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
803 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
804 getResolutionVariantObserver(
805 img, o, w, h, rvw, rvh, true));
806 }
807
808 private boolean prepareResolutionVariant(Image img, int w, int h,
809 ImageObserver o) {
810
811 ToolkitImage rvImage = getResolutionVariant(img);
812 int rvw = getRVSize(w);
813 int rvh = getRVSize(h);
814 // Ignore the resolution variant in case of error
815 return rvImage == null || rvImage.hasError() || prepareImage(
816 rvImage, rvw, rvh,
817 MultiResolutionToolkitImage.getResolutionVariantObserver(
818 img, o, w, h, rvw, rvh, true));
819 }
820
821 private static int getRVSize(int size){
822 return size == -1 ? -1 : 2 * size;
823 }
824
825 private static ToolkitImage getResolutionVariant(Image image) {
826 if (image instanceof MultiResolutionToolkitImage) {
827 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
828 getResolutionVariant();
829 if (resolutionVariant instanceof ToolkitImage) {
830 return (ToolkitImage) resolutionVariant;
831 }
832 }
833 return null;
834 }
835
836 protected static boolean imageCached(String fileName) {
837 return fileImgCache.containsKey(fileName);
838 }
839
840 protected static boolean imageCached(URL url) {
841 String key = url.toString();
842 return urlImgCache.containsKey(key);
843 }
844
845 protected static boolean imageExists(String filename) {
846 if (filename != null) {
847 checkPermissions(filename);
848 return new File(filename).exists();
849 }
850 return false;
851 }
852
853 @SuppressWarnings("try")
854 protected static boolean imageExists(URL url) {
855 if (url != null) {
856 checkPermissions(url);
857 try (InputStream is = url.openStream()) {
858 return true;
859 }catch(IOException e){
860 return false;
861 }
862 }
863 return false;
864 }
865
866 private static void checkPermissions(String filename) {
867 SecurityManager security = System.getSecurityManager();
868 if (security != null) {
869 security.checkRead(filename);
870 }
871 }
872
873 private static void checkPermissions(URL url) {
874 SecurityManager sm = System.getSecurityManager();
875 if (sm != null) {
876 try {
877 java.security.Permission perm =
878 URLUtil.getConnectPermission(url);
879 if (perm != null) {
880 try {
881 sm.checkPermission(perm);
882 } catch (SecurityException se) {
883 // fallback to checkRead/checkConnect for pre 1.2
884 // security managers
885 if ((perm instanceof java.io.FilePermission) &&
886 perm.getActions().indexOf("read") != -1) {
887 sm.checkRead(perm.getName());
888 } else if ((perm instanceof
889 java.net.SocketPermission) &&
890 perm.getActions().indexOf("connect") != -1) {
891 sm.checkConnect(url.getHost(), url.getPort());
892 } else {
893 throw se;
894 }
895 }
896 }
897 } catch (java.io.IOException ioe) {
898 sm.checkConnect(url.getHost(), url.getPort());
899 }
900 }
901 }
902
903 /**
904 * Scans {@code imageList} for best-looking image of specified dimensions.
905 * Image can be scaled and/or padded with transparency.
906 */
907 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
908 if (width == 0 || height == 0) {
909 return null;
910 }
911 java.util.List<Image> multiResolutionList = new LinkedList<>();
912 java.util.List<Image> imagesToRemove = new ArrayList<>();
913 for (Image image : imageList) {
914 if (image instanceof MultiResolutionImage) {
915 imagesToRemove.add(image);
916 Image im = ((MultiResolutionImage) image).getResolutionVariant(width, height);
917 multiResolutionList.add(im);
918 }
919 }
920 multiResolutionList.addAll(imageList);
921 multiResolutionList.removeAll(imagesToRemove);
922 Collections.sort(multiResolutionList, (Image m1, Image m2) -> {
923 return m1.getWidth(null) < m2.getWidth(null) &&
924 m1.getHeight(null) < m2.getHeight(null) ? -1 :
925 m1.getHeight(null) == m2.getHeight(null) &&
926 m1.getWidth(null) == m2.getWidth(null) ? 0 : 1;
927 });
928 Image bestImage = null;
929 int bestWidth = 0;
930 int bestHeight = 0;
931 double bestSimilarity = 3; //Impossibly high value
932 double bestScaleFactor = 0;
933 for (Iterator<Image> i = multiResolutionList.iterator();i.hasNext();) {
934 //Iterate imageList looking for best matching image.
935 //'Similarity' measure is defined as good scale factor and small insets.
936 //best possible similarity is 0 (no scale, no insets).
937 //It's found while the experiments that good-looking result is achieved
938 //with scale factors x1, x3/4, x2/3, xN, x1/N.
939 Image im = i.next();
940 if (im == null) {
941 continue;
942 }
943 if (im instanceof ToolkitImage) {
944 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
945 ir.reconstruct(ImageObserver.ALLBITS);
946 }
947 int iw;
948 int ih;
949 try {
950 iw = im.getWidth(null);
951 ih = im.getHeight(null);
952 } catch (Exception e){
953 continue;
954 }
955 if (iw > 0 && ih > 0) {
956 //Calc scale factor
957 double scaleFactor = Math.min((double)width / (double)iw,
958 (double)height / (double)ih);
959 //Calculate scaled image dimensions
960 //adjusting scale factor to nearest "good" value
961 int adjw = 0;
962 int adjh = 0;
963 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
964 if (scaleFactor >= 2) {
965 //Need to enlarge image more than twice
966 //Round down scale factor to multiply by integer value
967 scaleFactor = Math.floor(scaleFactor);
968 adjw = iw * (int)scaleFactor;
969 adjh = ih * (int)scaleFactor;
970 scaleMeasure = 1.0 - 0.5 / scaleFactor;
971 } else if (scaleFactor >= 1) {
972 //Don't scale
973 scaleFactor = 1.0;
974 adjw = iw;
975 adjh = ih;
976 scaleMeasure = 0;
977 } else if (scaleFactor >= 0.75) {
978 //Multiply by 3/4
979 scaleFactor = 0.75;
980 adjw = iw * 3 / 4;
981 adjh = ih * 3 / 4;
982 scaleMeasure = 0.3;
983 } else if (scaleFactor >= 0.6666) {
984 //Multiply by 2/3
985 scaleFactor = 0.6666;
986 adjw = iw * 2 / 3;
987 adjh = ih * 2 / 3;
988 scaleMeasure = 0.33;
989 } else {
990 //Multiply size by 1/scaleDivider
991 //where scaleDivider is minimum possible integer
992 //larger than 1/scaleFactor
993 double scaleDivider = Math.ceil(1.0 / scaleFactor);
994 scaleFactor = 1.0 / scaleDivider;
995 adjw = (int)Math.round((double)iw / scaleDivider);
996 adjh = (int)Math.round((double)ih / scaleDivider);
997 scaleMeasure = 1.0 - 1.0 / scaleDivider;
998 }
999 double similarity = ((double)width - (double)adjw) / (double)width +
1000 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1001 scaleMeasure; //Large rescale is bad
1002 if (similarity < bestSimilarity) {
1003 bestSimilarity = similarity;
1004 bestScaleFactor = scaleFactor;
1005 bestImage = im;
1006 bestWidth = adjw;
1007 bestHeight = adjh;
1008 }
1009 if (similarity == 0) break;
1010 }
1011 }
1012 if (bestImage == null) {
1013 //No images were found, possibly all are broken
1014 return null;
1015 }
1016 BufferedImage bimage =
1017 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1018 Graphics2D g = bimage.createGraphics();
1019 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1020 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1021 try {
1022 int x = (width - bestWidth) / 2;
1023 int y = (height - bestHeight) / 2;
1024 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1025 } finally {
1026 g.dispose();
1027 }
1028 return bimage;
1029 }
1030
1031 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1032 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1033 if (bimage == null) {
1034 return null;
1035 }
1036 Raster raster = bimage.getRaster();
1037 DataBuffer buffer = raster.getDataBuffer();
1038 return (DataBufferInt)buffer;
1039 }
1040
1041 @Override
1042 protected EventQueue getSystemEventQueueImpl() {
1043 return getSystemEventQueueImplPP();
1044 }
1045
1046 // Package private implementation
1047 static EventQueue getSystemEventQueueImplPP() {
1048 return getSystemEventQueueImplPP(AppContext.getAppContext());
1049 }
1050
1051 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1052 EventQueue theEventQueue =
1053 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1054 return theEventQueue;
1055 }
1056
1057 /**
1058 * Give native peers the ability to query the native container
1059 * given a native component (eg the direct parent may be lightweight).
1060 */
1061 public static Container getNativeContainer(Component c) {
1062 return Toolkit.getNativeContainer(c);
1063 }
1064
1065 /**
1066 * Gives native peers the ability to query the closest HW component.
1067 * If the given component is heavyweight, then it returns this. Otherwise,
1068 * it goes one level up in the hierarchy and tests next component.
1069 */
1070 public static Component getHeavyweightComponent(Component c) {
1071 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1072 c = AWTAccessor.getComponentAccessor().getParent(c);
1073 }
1074 return c;
1075 }
1076
1077 /**
1078 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1079 */
1080 public int getFocusAcceleratorKeyMask() {
1081 return InputEvent.ALT_MASK;
1082 }
1083
1084 /**
1085 * Tests whether specified key modifiers mask can be used to enter a printable
1086 * character. This is a default implementation of this method, which reflects
1087 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1088 * characters from the extended character set (like euro sign or math symbols)
1089 */
1090 public boolean isPrintableCharacterModifiersMask(int mods) {
1091 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1092 }
1093
1094 /**
1095 * Returns whether popup is allowed to be shown above the task bar.
1096 * This is a default implementation of this method, which checks
1097 * corresponding security permission.
1098 */
1099 public boolean canPopupOverlapTaskBar() {
1100 boolean result = true;
1101 try {
1102 SecurityManager sm = System.getSecurityManager();
1103 if (sm != null) {
1104 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1105 }
1106 } catch (SecurityException se) {
1107 // There is no permission to show popups over the task bar
1108 result = false;
1109 }
1110 return result;
1111 }
1112
1113 /**
1114 * Returns a new input method window, with behavior as specified in
1115 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1116 * If the inputContext is not null, the window should return it from its
1117 * getInputContext() method. The window needs to implement
1118 * sun.awt.im.InputMethodWindow.
1119 * <p>
1120 * SunToolkit subclasses can override this method to return better input
1121 * method windows.
1122 */
1123 @Override
1124 public Window createInputMethodWindow(String title, InputContext context) {
1125 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1126 }
1127
1128 /**
1129 * Returns whether enableInputMethods should be set to true for peered
1130 * TextComponent instances on this platform. False by default.
1131 */
1132 @Override
1133 public boolean enableInputMethodsForTextComponent() {
1134 return false;
1135 }
1136
1137 private static Locale startupLocale = null;
1138
1139 /**
1140 * Returns the locale in which the runtime was started.
1141 */
1142 public static Locale getStartupLocale() {
1143 if (startupLocale == null) {
1144 String language, region, country, variant;
1145 language = AccessController.doPrivileged(
1146 new GetPropertyAction("user.language", "en"));
1147 // for compatibility, check for old user.region property
1148 region = AccessController.doPrivileged(
1149 new GetPropertyAction("user.region"));
1150 if (region != null) {
1151 // region can be of form country, country_variant, or _variant
1152 int i = region.indexOf('_');
1153 if (i >= 0) {
1154 country = region.substring(0, i);
1155 variant = region.substring(i + 1);
1156 } else {
1157 country = region;
1158 variant = "";
1159 }
1160 } else {
1161 country = AccessController.doPrivileged(
1162 new GetPropertyAction("user.country", ""));
1163 variant = AccessController.doPrivileged(
1164 new GetPropertyAction("user.variant", ""));
1165 }
1166 startupLocale = new Locale(language, country, variant);
1167 }
1168 return startupLocale;
1169 }
1170
1171 /**
1172 * Returns the default keyboard locale of the underlying operating system
1173 */
1174 @Override
1175 public Locale getDefaultKeyboardLocale() {
1176 return getStartupLocale();
1177 }
1178
1179 /**
1180 * Returns whether default toolkit needs the support of the xembed
1181 * from embedding host(if any).
1182 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1183 */
1184 public static boolean needsXEmbed() {
1185 String noxembed = AccessController.
1186 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1187 if ("true".equals(noxembed)) {
1188 return false;
1189 }
1190
1191 Toolkit tk = Toolkit.getDefaultToolkit();
1192 if (tk instanceof SunToolkit) {
1193 // SunToolkit descendants should override this method to specify
1194 // concrete behavior
1195 return ((SunToolkit)tk).needsXEmbedImpl();
1196 } else {
1197 // Non-SunToolkit doubtly might support XEmbed
1198 return false;
1199 }
1200 }
1201
1202 /**
1203 * Returns whether this toolkit needs the support of the xembed
1204 * from embedding host(if any).
1205 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1206 */
1207 protected boolean needsXEmbedImpl() {
1208 return false;
1209 }
1210
1211 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1212
1213 /**
1214 * Returns whether the XEmbed server feature is requested by
1215 * developer. If true, Toolkit should return an
1216 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1217 */
1218 protected final boolean isXEmbedServerRequested() {
1219 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1220 }
1221
1222 /**
1223 * Returns whether the modal exclusion API is supported by the current toolkit.
1224 * When it isn't supported, calling {@code setModalExcluded} has no
1225 * effect, and {@code isModalExcluded} returns false for all windows.
1226 *
1227 * @return true if modal exclusion is supported by the toolkit, false otherwise
1228 *
1229 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1230 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1231 *
1232 * @since 1.5
1233 */
1234 public static boolean isModalExcludedSupported()
1235 {
1236 Toolkit tk = Toolkit.getDefaultToolkit();
1237 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1238 }
1239 /*
1240 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1241 *
1242 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1243 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1244 *
1245 * @since 1.5
1246 */
1247 protected boolean isModalExcludedSupportedImpl()
1248 {
1249 return false;
1250 }
1251
1252 /*
1253 * Sets this window to be excluded from being modally blocked. When the
1254 * toolkit supports modal exclusion and this method is called, input
1255 * events, focus transfer and z-order will continue to work for the
1256 * window, it's owned windows and child components, even in the
1257 * presence of a modal dialog.
1258 * For details on which {@code Window}s are normally blocked
1259 * by modal dialog, see {@link java.awt.Dialog}.
1260 * Invoking this method when the modal exclusion API is not supported by
1261 * the current toolkit has no effect.
1262 * @param window Window to be marked as not modally blocked
1263 * @see java.awt.Dialog
1264 * @see java.awt.Dialog#setModal(boolean)
1265 * @see sun.awt.SunToolkit#isModalExcludedSupported
1266 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1267 */
1268 public static void setModalExcluded(Window window)
1269 {
1270 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1271 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1272 }
1273 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1274 }
1275
1276 /*
1277 * Returns whether the specified window is blocked by modal dialogs.
1278 * If the modal exclusion API isn't supported by the current toolkit,
1279 * it returns false for all windows.
1280 *
1281 * @param window Window to test for modal exclusion
1282 *
1283 * @return true if the window is modal excluded, false otherwise. If
1284 * the modal exclusion isn't supported by the current Toolkit, false
1285 * is returned
1286 *
1287 * @see sun.awt.SunToolkit#isModalExcludedSupported
1288 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1289 *
1290 * @since 1.5
1291 */
1292 public static boolean isModalExcluded(Window window)
1293 {
1294 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1295 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1296 }
1297 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1298 }
1299
1300 /**
1301 * Overridden in XToolkit and WToolkit
1302 */
1303 @Override
1304 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1305 return (modalityType == Dialog.ModalityType.MODELESS) ||
1306 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1307 }
1308
1309 /**
1310 * Overridden in XToolkit and WToolkit
1311 */
1312 @Override
1313 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1314 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1315 }
1316
1317 ///////////////////////////////////////////////////////////////////////////
1318 //
1319 // The following is used by the Java Plug-in to coordinate dialog modality
1320 // between containing applications (browsers, ActiveX containers etc) and
1321 // the AWT.
1322 //
1323 ///////////////////////////////////////////////////////////////////////////
1324
1325 private ModalityListenerList modalityListeners = new ModalityListenerList();
1326
1327 public void addModalityListener(ModalityListener listener) {
1328 modalityListeners.add(listener);
1329 }
1330
1331 public void removeModalityListener(ModalityListener listener) {
1332 modalityListeners.remove(listener);
1333 }
1334
1335 public void notifyModalityPushed(Dialog dialog) {
1336 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1337 }
1338
1339 public void notifyModalityPopped(Dialog dialog) {
1340 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1341 }
1342
1343 final void notifyModalityChange(int id, Dialog source) {
1344 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1345 ev.dispatch();
1346 }
1347
1348 static class ModalityListenerList implements ModalityListener {
1349
1350 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1351
1352 void add(ModalityListener listener) {
1353 listeners.addElement(listener);
1354 }
1355
1356 void remove(ModalityListener listener) {
1357 listeners.removeElement(listener);
1358 }
1359
1360 @Override
1361 public void modalityPushed(ModalityEvent ev) {
1362 Iterator<ModalityListener> it = listeners.iterator();
1363 while (it.hasNext()) {
1364 it.next().modalityPushed(ev);
1365 }
1366 }
1367
1368 @Override
1369 public void modalityPopped(ModalityEvent ev) {
1370 Iterator<ModalityListener> it = listeners.iterator();
1371 while (it.hasNext()) {
1372 it.next().modalityPopped(ev);
1373 }
1374 }
1375 } // end of class ModalityListenerList
1376
1377 ///////////////////////////////////////////////////////////////////////////
1378 // End Plug-in code
1379 ///////////////////////////////////////////////////////////////////////////
1380
1381 public static boolean isLightweightOrUnknown(Component comp) {
1382 if (comp.isLightweight()
1383 || !(getDefaultToolkit() instanceof SunToolkit))
1384 {
1385 return true;
1386 }
1387 return !(comp instanceof Button
1388 || comp instanceof Canvas
1389 || comp instanceof Checkbox
1390 || comp instanceof Choice
1391 || comp instanceof Label
1392 || comp instanceof java.awt.List
1393 || comp instanceof Panel
1394 || comp instanceof Scrollbar
1395 || comp instanceof ScrollPane
1396 || comp instanceof TextArea
1397 || comp instanceof TextField
1398 || comp instanceof Window);
1399 }
1400
1401 @SuppressWarnings("serial")
1402 public static class OperationTimedOut extends RuntimeException {
1403 public OperationTimedOut(String msg) {
1404 super(msg);
1405 }
1406 public OperationTimedOut() {
1407 }
1408 }
1409
1410 @SuppressWarnings("serial")
1411 public static class InfiniteLoop extends RuntimeException {
1412 }
1413
1414 @SuppressWarnings("serial")
1415 public static class IllegalThreadException extends RuntimeException {
1416 public IllegalThreadException(String msg) {
1417 super(msg);
1418 }
1419 public IllegalThreadException() {
1420 }
1421 }
1422
1423 public static final int DEFAULT_WAIT_TIME = 10000;
1424 private static final int MAX_ITERS = 20;
1425 private static final int MIN_ITERS = 0;
1426 private static final int MINIMAL_EDELAY = 0;
1427
1428 /**
1429 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1430 */
1431 public void realSync() throws OperationTimedOut, InfiniteLoop {
1432 realSync(DEFAULT_WAIT_TIME);
1433 }
1434
1435 /**
1436 * Forces toolkit to synchronize with the native windowing
1437 * sub-system, flushing all pending work and waiting for all the
1438 * events to be processed. This method guarantees that after
1439 * return no additional Java events will be generated, unless
1440 * cause by user. Obviously, the method cannot be used on the
1441 * event dispatch thread (EDT). In case it nevertheless gets
1442 * invoked on this thread, the method throws the
1443 * IllegalThreadException runtime exception.
1444 *
1445 * <p> This method allows to write tests without explicit timeouts
1446 * or wait for some event. Example:
1447 * <pre>{@code
1448 * Frame f = ...;
1449 * f.setVisible(true);
1450 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1451 * }</pre>
1452 *
1453 * <p> After realSync, {@code f} will be completely visible
1454 * on the screen, its getLocationOnScreen will be returning the
1455 * right result and it will be the focus owner.
1456 *
1457 * <p> Another example:
1458 * <pre>{@code
1459 * b.requestFocus();
1460 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1461 * }</pre>
1462 *
1463 * <p> After realSync, {@code b} will be focus owner.
1464 *
1465 * <p> Notice that realSync isn't guaranteed to work if recurring
1466 * actions occur, such as if during processing of some event
1467 * another request which may generate some events occurs. By
1468 * default, sync tries to perform as much as {@value #MAX_ITERS}
1469 * cycles of event processing, allowing for roughly {@value
1470 * #MAX_ITERS} additional requests.
1471 *
1472 * <p> For example, requestFocus() generates native request, which
1473 * generates one or two Java focus events, which then generate a
1474 * serie of paint events, a serie of Java focus events, which then
1475 * generate a serie of paint events which then are processed -
1476 * three cycles, minimum.
1477 *
1478 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1479 */
1480 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1481 {
1482 if (EventQueue.isDispatchThread()) {
1483 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1484 }
1485 int bigLoop = 0;
1486 do {
1487 // Let's do sync first
1488 sync();
1489
1490 // During the wait process, when we were processing incoming
1491 // events, we could have made some new request, which can
1492 // generate new events. Example: MapNotify/XSetInputFocus.
1493 // Therefore, we dispatch them as long as there is something
1494 // to dispatch.
1495 int iters = 0;
1496 while (iters < MIN_ITERS) {
1497 syncNativeQueue(timeout);
1498 iters++;
1499 }
1500 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1501 iters++;
1502 }
1503 if (iters >= MAX_ITERS) {
1504 throw new InfiniteLoop();
1505 }
1506
1507 // native requests were dispatched by X/Window Manager or Windows
1508 // Moreover, we processed them all on Toolkit thread
1509 // Now wait while EDT processes them.
1510 //
1511 // During processing of some events (focus, for example),
1512 // some other events could have been generated. So, after
1513 // waitForIdle, we may end up with full EventQueue
1514 iters = 0;
1515 while (iters < MIN_ITERS) {
1516 waitForIdle(timeout);
1517 iters++;
1518 }
1519 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1520 iters++;
1521 }
1522 if (iters >= MAX_ITERS) {
1523 throw new InfiniteLoop();
1524 }
1525
1526 bigLoop++;
1527 // Again, for Java events, it was simple to check for new Java
1528 // events by checking event queue, but what if Java events
1529 // resulted in native requests? Therefor, check native events again.
1530 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1531 }
1532
1533 /**
1534 * Platform toolkits need to implement this method to perform the
1535 * sync of the native queue. The method should wait until native
1536 * requests are processed, all native events are processed and
1537 * corresponding Java events are generated. Should return
1538 * {@code true} if some events were processed,
1539 * {@code false} otherwise.
1540 */
1541 protected abstract boolean syncNativeQueue(final long timeout);
1542
1543 private boolean eventDispatched = false;
1544 private boolean queueEmpty = false;
1545 private final Object waitLock = "Wait Lock";
1546
1547 private boolean isEQEmpty() {
1548 EventQueue queue = getSystemEventQueueImpl();
1549 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1550 }
1551
1552 /**
1553 * Waits for the Java event queue to empty. Ensures that all
1554 * events are processed (including paint events), and that if
1555 * recursive events were generated, they are also processed.
1556 * Should return {@code true} if more processing is
1557 * necessary, {@code false} otherwise.
1558 */
1559 @SuppressWarnings("serial")
1560 protected final boolean waitForIdle(final long timeout) {
1561 flushPendingEvents();
1562 boolean queueWasEmpty = isEQEmpty();
1563 queueEmpty = false;
1564 eventDispatched = false;
1565 synchronized(waitLock) {
1566 postEvent(AppContext.getAppContext(),
1567 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1568 @Override
1569 public void dispatch() {
1570 // Here we block EDT. It could have some
1571 // events, it should have dispatched them by
1572 // now. So native requests could have been
1573 // generated. First, dispatch them. Then,
1574 // flush Java events again.
1575 int iters = 0;
1576 while (iters < MIN_ITERS) {
1577 syncNativeQueue(timeout);
1578 iters++;
1579 }
1580 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1581 iters++;
1582 }
1583 flushPendingEvents();
1584
1585 synchronized(waitLock) {
1586 queueEmpty = isEQEmpty();
1587 eventDispatched = true;
1588 waitLock.notifyAll();
1589 }
1590 }
1591 });
1592 try {
1593 while (!eventDispatched) {
1594 waitLock.wait();
1595 }
1596 } catch (InterruptedException ie) {
1597 return false;
1598 }
1599 }
1600
1601 try {
1602 Thread.sleep(MINIMAL_EDELAY);
1603 } catch (InterruptedException ie) {
1604 throw new RuntimeException("Interrupted");
1605 }
1606
1607 flushPendingEvents();
1608
1609 // Lock to force write-cache flush for queueEmpty.
1610 synchronized (waitLock) {
1611 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1612 }
1613 }
1614
1615 /**
1616 * Grabs the mouse input for the given window. The window must be
1617 * visible. The window or its children do not receive any
1618 * additional mouse events besides those targeted to them. All
1619 * other events will be dispatched as before - to the respective
1620 * targets. This Window will receive UngrabEvent when automatic
1621 * ungrab is about to happen. The event can be listened to by
1622 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1623 * UngrabEvent class for the list of conditions when ungrab is
1624 * about to happen.
1625 * @see UngrabEvent
1626 */
1627 public abstract void grab(Window w);
1628
1629 /**
1630 * Forces ungrab. No event will be sent.
1631 */
1632 public abstract void ungrab(Window w);
1633
1634
1635 /**
1636 * Locates the splash screen library in a platform dependent way and closes
1637 * the splash screen. Should be invoked on first top-level frame display.
1638 * @see java.awt.SplashScreen
1639 * @since 1.6
1640 */
1641 public static native void closeSplashScreen();
1642
1643 /* The following methods and variables are to support retrieving
1644 * desktop text anti-aliasing settings
1645 */
1646
1647 /* Need an instance method because setDesktopProperty(..) is protected. */
1648 private void fireDesktopFontPropertyChanges() {
1649 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1650 SunToolkit.getDesktopFontHints());
1651 }
1652
1653 private static boolean checkedSystemAAFontSettings;
1654 private static boolean useSystemAAFontSettings;
1655 private static boolean lastExtraCondition = true;
1656 private static RenderingHints desktopFontHints;
1657
1658 /* Since Swing is the reason for this "extra condition" logic its
1659 * worth documenting it in some detail.
1660 * First, a goal is for Swing and applications to both retrieve and
1661 * use the same desktop property value so that there is complete
1662 * consistency between the settings used by JDK's Swing implementation
1663 * and 3rd party custom Swing components, custom L&Fs and any general
1664 * text rendering that wants to be consistent with these.
1665 * But by default on Solaris & Linux Swing will not use AA text over
1666 * remote X11 display (unless Xrender can be used which is TBD and may not
1667 * always be available anyway) as that is a noticeable performance hit.
1668 * So there needs to be a way to express that extra condition so that
1669 * it is seen by all clients of the desktop property API.
1670 * If this were the only condition it could be handled here as it would
1671 * be the same for any L&F and could reasonably be considered to be
1672 * a static behaviour of those systems.
1673 * But GTK currently has an additional test based on locale which is
1674 * not applied by Metal. So mixing GTK in a few locales with Metal
1675 * would mean the last one wins.
1676 * This could be stored per-app context which would work
1677 * for different applets, but wouldn't help for a single application
1678 * using GTK and some other L&F concurrently.
1679 * But it is expected this will be addressed within GTK and the font
1680 * system so is a temporary and somewhat unlikely harmless corner case.
1681 */
1682 public static void setAAFontSettingsCondition(boolean extraCondition) {
1683 if (extraCondition != lastExtraCondition) {
1684 lastExtraCondition = extraCondition;
1685 if (checkedSystemAAFontSettings) {
1686 /* Someone already asked for this info, under a different
1687 * condition.
1688 * We'll force re-evaluation instead of replicating the
1689 * logic, then notify any listeners of any change.
1690 */
1691 checkedSystemAAFontSettings = false;
1692 Toolkit tk = Toolkit.getDefaultToolkit();
1693 if (tk instanceof SunToolkit) {
1694 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1695 }
1696 }
1697 }
1698 }
1699
1700 /* "false", "off", ""default" aren't explicitly tested, they
1701 * just fall through to produce a null return which all are equated to
1702 * "false".
1703 */
1704 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1705 Object aaHint = null;
1706 hintname = hintname.toLowerCase(Locale.ENGLISH);
1707 if (hintname.equals("on")) {
1708 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1709 } else if (hintname.equals("gasp")) {
1710 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1711 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1712 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1713 } else if (hintname.equals("lcd_hbgr")) {
1714 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1715 } else if (hintname.equals("lcd_vrgb")) {
1716 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1717 } else if (hintname.equals("lcd_vbgr")) {
1718 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1719 }
1720 if (aaHint != null) {
1721 RenderingHints map = new RenderingHints(null);
1722 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1723 return map;
1724 } else {
1725 return null;
1726 }
1727 }
1728
1729 /* This method determines whether to use the system font settings,
1730 * or ignore them if a L&F has specified they should be ignored, or
1731 * to override both of these with a system property specified value.
1732 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1733 * system property isn't applied as desktop properties are considered
1734 * to be inapplicable in that case. In that headless case although
1735 * this method will return "true" the toolkit will return a null map.
1736 */
1737 private static boolean useSystemAAFontSettings() {
1738 if (!checkedSystemAAFontSettings) {
1739 useSystemAAFontSettings = true; /* initially set this true */
1740 String systemAAFonts = null;
1741 Toolkit tk = Toolkit.getDefaultToolkit();
1742 if (tk instanceof SunToolkit) {
1743 systemAAFonts =
1744 AccessController.doPrivileged(
1745 new GetPropertyAction("awt.useSystemAAFontSettings"));
1746 }
1747 if (systemAAFonts != null) {
1748 useSystemAAFontSettings =
1749 Boolean.valueOf(systemAAFonts).booleanValue();
1750 /* If it is anything other than "true", then it may be
1751 * a hint name , or it may be "off, "default", etc.
1752 */
1753 if (!useSystemAAFontSettings) {
1754 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1755 }
1756 }
1757 /* If its still true, apply the extra condition */
1758 if (useSystemAAFontSettings) {
1759 useSystemAAFontSettings = lastExtraCondition;
1760 }
1761 checkedSystemAAFontSettings = true;
1762 }
1763 return useSystemAAFontSettings;
1764 }
1765
1766 /* A variable defined for the convenience of JDK code */
1767 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1768
1769 /* Overridden by subclasses to return platform/desktop specific values */
1770 protected RenderingHints getDesktopAAHints() {
1771 return null;
1772 }
1773
1774 /* Subclass desktop property loading methods call this which
1775 * in turn calls the appropriate subclass implementation of
1776 * getDesktopAAHints() when system settings are being used.
1777 * Its public rather than protected because subclasses may delegate
1778 * to a helper class.
1779 */
1780 public static RenderingHints getDesktopFontHints() {
1781 if (useSystemAAFontSettings()) {
1782 Toolkit tk = Toolkit.getDefaultToolkit();
1783 if (tk instanceof SunToolkit) {
1784 Object map = ((SunToolkit)tk).getDesktopAAHints();
1785 return (RenderingHints)map;
1786 } else { /* Headless Toolkit */
1787 return null;
1788 }
1789 } else if (desktopFontHints != null) {
1790 /* cloning not necessary as the return value is cloned later, but
1791 * its harmless.
1792 */
1793 return (RenderingHints)(desktopFontHints.clone());
1794 } else {
1795 return null;
1796 }
1797 }
1798
1799
1800 public abstract boolean isDesktopSupported();
1801 public abstract boolean isTaskbarSupported();
1802
1803 /*
1804 * consumeNextKeyTyped() method is not currently used,
1805 * however Swing could use it in the future.
1806 */
1807 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1808 try {
1809 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1810 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1811 getCurrentKeyboardFocusManager(),
1812 keyEvent);
1813 } catch (ClassCastException cce) {
1814 cce.printStackTrace();
1815 }
1816 }
1817
1818 protected static void dumpPeers(final PlatformLogger aLog) {
1819 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1820 }
1821
1822 /**
1823 * Returns the {@code Window} ancestor of the component {@code comp}.
1824 * @return Window ancestor of the component or component by itself if it is Window;
1825 * null, if component is not a part of window hierarchy
1826 */
1827 public static Window getContainingWindow(Component comp) {
1828 while (comp != null && !(comp instanceof Window)) {
1829 comp = comp.getParent();
1830 }
1831 return (Window)comp;
1832 }
1833
1834 private static Boolean sunAwtDisableMixing = null;
1835
1836 /**
1837 * Returns the value of "sun.awt.disableMixing" property. Default
1838 * value is {@code false}.
1839 */
1840 public static synchronized boolean getSunAwtDisableMixing() {
1841 if (sunAwtDisableMixing == null) {
1842 sunAwtDisableMixing = AccessController.doPrivileged(
1843 new GetBooleanAction("sun.awt.disableMixing"));
1844 }
1845 return sunAwtDisableMixing.booleanValue();
1846 }
1847
1848 /**
1849 * Returns true if the native GTK libraries are available. The
1850 * default implementation returns false, but UNIXToolkit overrides this
1851 * method to provide a more specific answer.
1852 */
1853 public boolean isNativeGTKAvailable() {
1854 return false;
1855 }
1856
1857 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1858
1859 public synchronized void setWindowDeactivationTime(Window w, long time) {
1860 AppContext ctx = getAppContext(w);
1861 if (ctx == null) {
1862 return;
1863 }
1864 @SuppressWarnings("unchecked")
1865 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1866 if (map == null) {
1867 map = new WeakHashMap<Window, Long>();
1868 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1869 }
1870 map.put(w, time);
1871 }
1872
1873 public synchronized long getWindowDeactivationTime(Window w) {
1874 AppContext ctx = getAppContext(w);
1875 if (ctx == null) {
1876 return -1;
1877 }
1878 @SuppressWarnings("unchecked")
1879 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1880 if (map == null) {
1881 return -1;
1882 }
1883 Long time = map.get(w);
1884 return time == null ? -1 : time;
1885 }
1886
1887 // Cosntant alpha
1888 public boolean isWindowOpacitySupported() {
1889 return false;
1890 }
1891
1892 // Shaping
1893 public boolean isWindowShapingSupported() {
1894 return false;
1895 }
1896
1897 // Per-pixel alpha
1898 public boolean isWindowTranslucencySupported() {
1899 return false;
1900 }
1901
1902 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1903 return false;
1904 }
1905
1906 /**
1907 * Returns true if swing backbuffer should be translucent.
1908 */
1909 public boolean isSwingBackbufferTranslucencySupported() {
1910 return false;
1911 }
1912
1913 /**
1914 * Returns whether or not a containing top level window for the passed
1915 * component is
1916 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1917 *
1918 * @param c a Component which toplevel's to check
1919 * @return {@code true} if the passed component is not null and has a
1920 * containing toplevel window which is opaque (so per-pixel translucency
1921 * is not enabled), {@code false} otherwise
1922 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1923 */
1924 public static boolean isContainingTopLevelOpaque(Component c) {
1925 Window w = getContainingWindow(c);
1926 return w != null && w.isOpaque();
1927 }
1928
1929 /**
1930 * Returns whether or not a containing top level window for the passed
1931 * component is
1932 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1933 *
1934 * @param c a Component which toplevel's to check
1935 * @return {@code true} if the passed component is not null and has a
1936 * containing toplevel window which has opacity less than
1937 * 1.0f (which means that it is translucent), {@code false} otherwise
1938 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1939 */
1940 public static boolean isContainingTopLevelTranslucent(Component c) {
1941 Window w = getContainingWindow(c);
1942 return w != null && w.getOpacity() < 1.0f;
1943 }
1944
1945 /**
1946 * Returns whether the native system requires using the peer.updateWindow()
1947 * method to update the contents of a non-opaque window, or if usual
1948 * painting procedures are sufficient. The default return value covers
1949 * the X11 systems. On MS Windows this method is overriden in WToolkit
1950 * to return true.
1951 */
1952 public boolean needUpdateWindow() {
1953 return false;
1954 }
1955
1956 /**
1957 * Descendants of the SunToolkit should override and put their own logic here.
1958 */
1959 public int getNumberOfButtons(){
1960 return 3;
1961 }
1962
1963 /**
1964 * Checks that the given object implements/extends the given
1965 * interface/class.
1966 *
1967 * Note that using the instanceof operator causes a class to be loaded.
1968 * Using this method doesn't load a class and it can be used instead of
1969 * the instanceof operator for performance reasons.
1970 *
1971 * @param obj Object to be checked
1972 * @param type The name of the interface/class. Must be
1973 * fully-qualified interface/class name.
1974 * @return true, if this object implements/extends the given
1975 * interface/class, false, otherwise, or if obj or type is null
1976 */
1977 public static boolean isInstanceOf(Object obj, String type) {
1978 if (obj == null) return false;
1979 if (type == null) return false;
1980
1981 return isInstanceOf(obj.getClass(), type);
1982 }
1983
1984 private static boolean isInstanceOf(Class<?> cls, String type) {
1985 if (cls == null) return false;
1986
1987 if (cls.getName().equals(type)) {
1988 return true;
1989 }
1990
1991 for (Class<?> c : cls.getInterfaces()) {
1992 if (c.getName().equals(type)) {
1993 return true;
1994 }
1995 }
1996 return isInstanceOf(cls.getSuperclass(), type);
1997 }
1998
1999 protected static LightweightFrame getLightweightFrame(Component c) {
2000 for (; c != null; c = c.getParent()) {
2001 if (c instanceof LightweightFrame) {
2002 return (LightweightFrame)c;
2003 }
2004 if (c instanceof Window) {
2005 // Don't traverse owner windows
2006 return null;
2007 }
2008 }
2009 return null;
2010 }
2011
2012 ///////////////////////////////////////////////////////////////////////////
2013 //
2014 // The following methods help set and identify whether a particular
2015 // AWTEvent object was produced by the system or by user code. As of this
2016 // writing the only consumer is the Java Plug-In, although this information
2017 // could be useful to more clients and probably should be formalized in
2018 // the public API.
2019 //
2020 ///////////////////////////////////////////////////////////////////////////
2021
2022 public static void setSystemGenerated(AWTEvent e) {
2023 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2024 }
2025
2026 public static boolean isSystemGenerated(AWTEvent e) {
2027 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2028 }
2029
2030 } // class SunToolkit
2031
2032
2033 /*
2034 * PostEventQueue is a Thread that runs in the same AppContext as the
2035 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2036 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2037 * events to this queue, which then calls EventQueue.postEvent().
2038 *
2039 * We do this because EventQueue.postEvent() may be overridden by client
2040 * code, and we mustn't ever call client code from the toolkit thread.
2041 */
2042 class PostEventQueue {
2043 private EventQueueItem queueHead = null;
2044 private EventQueueItem queueTail = null;
2045 private final EventQueue eventQueue;
2046
2047 private Thread flushThread = null;
2048
2049 PostEventQueue(EventQueue eq) {
2050 eventQueue = eq;
2051 }
2052
2053 /*
2054 * Continually post pending AWTEvents to the Java EventQueue. The method
2055 * is synchronized to ensure the flush is completed before a new event
2056 * can be posted to this queue.
2057 *
2058 * 7177040: The method couldn't be wholly synchronized because of calls
2059 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2060 * potentially lead to deadlock
2061 */
2062 public void flush() {
2063
2064 Thread newThread = Thread.currentThread();
2065
2066 try {
2067 EventQueueItem tempQueue;
2068 synchronized (this) {
2069 // Avoid method recursion
2070 if (newThread == flushThread) {
2071 return;
2072 }
2073 // Wait for other threads' flushing
2074 while (flushThread != null) {
2075 wait();
2076 }
2077 // Skip everything if queue is empty
2078 if (queueHead == null) {
2079 return;
2080 }
2081 // Remember flushing thread
2082 flushThread = newThread;
2083
2084 tempQueue = queueHead;
2085 queueHead = queueTail = null;
2086 }
2087 try {
2088 while (tempQueue != null) {
2089 eventQueue.postEvent(tempQueue.event);
2090 tempQueue = tempQueue.next;
2091 }
2092 }
2093 finally {
2094 // Only the flushing thread can get here
2095 synchronized (this) {
2096 // Forget flushing thread, inform other pending threads
2097 flushThread = null;
2098 notifyAll();
2099 }
2100 }
2101 }
2102 catch (InterruptedException e) {
2103 // Couldn't allow exception go up, so at least recover the flag
2104 newThread.interrupt();
2105 }
2106 }
2107
2108 /*
2109 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2110 */
2111 void postEvent(AWTEvent event) {
2112 EventQueueItem item = new EventQueueItem(event);
2113
2114 synchronized (this) {
2115 if (queueHead == null) {
2116 queueHead = queueTail = item;
2117 } else {
2118 queueTail.next = item;
2119 queueTail = item;
2120 }
2121 }
2122 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2123 }
2124 } // class PostEventQueue