1 /*
2 * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import java.awt.event.InputEvent;
30 import java.awt.event.KeyEvent;
31 import java.awt.event.WindowEvent;
32 import java.awt.image.BufferedImage;
33 import java.awt.image.ColorModel;
34 import java.awt.image.DataBuffer;
35 import java.awt.image.DataBufferInt;
36 import java.awt.image.ImageObserver;
37 import java.awt.image.ImageProducer;
38 import java.awt.image.Raster;
39 import java.awt.peer.FramePeer;
40 import java.awt.peer.KeyboardFocusManagerPeer;
41 import java.awt.peer.MouseInfoPeer;
42 import java.awt.peer.SystemTrayPeer;
43 import java.awt.peer.TrayIconPeer;
44 import java.io.File;
45 import java.io.IOException;
46 import java.io.InputStream;
47 import java.lang.reflect.InvocationTargetException;
48 import java.net.SocketPermission;
49 import java.net.URL;
50 import java.net.URLPermission;
51 import java.security.AccessController;
52 import java.util.ArrayList;
53 import java.util.Collections;
54 import java.util.Iterator;
55 import java.util.Locale;
56 import java.util.Map;
57 import java.util.Vector;
58 import java.util.WeakHashMap;
59 import java.util.concurrent.TimeUnit;
60 import java.util.concurrent.locks.Condition;
61 import java.util.concurrent.locks.ReentrantLock;
62
63 import sun.awt.im.InputContext;
64 import sun.awt.image.ByteArrayImageSource;
65 import sun.awt.image.FileImageSource;
66 import sun.awt.image.ImageRepresentation;
67 import java.awt.image.MultiResolutionImage;
68 import sun.awt.image.MultiResolutionToolkitImage;
69 import sun.awt.image.ToolkitImage;
70 import sun.awt.image.URLImageSource;
71 import sun.font.FontDesignMetrics;
72 import sun.net.util.URLUtil;
73 import sun.security.action.GetBooleanAction;
74 import sun.security.action.GetPropertyAction;
75 import sun.util.logging.PlatformLogger;
76
77 import static java.awt.RenderingHints.*;
78
79 public abstract class SunToolkit extends Toolkit
80 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
81
82 // 8014718: logging has been removed from SunToolkit
83
84 /* Load debug settings for native code */
85 static {
86 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
87 DebugSettings.init();
88 }
89 touchKeyboardAutoShowIsEnabled = Boolean.valueOf(
90 GetPropertyAction.privilegedGetProperty(
91 "awt.touchKeyboardAutoShowIsEnabled", "true"));
92 };
93
94 /**
95 * Special mask for the UngrabEvent events, in addition to the
96 * public masks defined in AWTEvent. Should be used as the mask
97 * value for Toolkit.addAWTEventListener.
98 */
99 public static final int GRAB_EVENT_MASK = 0x80000000;
100
101 /* The key to put()/get() the PostEventQueue into/from the AppContext.
102 */
103 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
104
105 /**
106 * Number of buttons.
107 * By default it's taken from the system. If system value does not
108 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
109 */
110 protected static int numberOfButtons = 0;
111
112
113 /* XFree standard mention 24 buttons as maximum:
114 * http://www.xfree86.org/current/mouse.4.html
115 * We workaround systems supporting more than 24 buttons.
116 * Otherwise, we have to use long type values as masks
117 * which leads to API change.
118 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
119 * the 4-bytes limit for the int type. (CR 6799099)
120 * One more bit is reserved for FIRST_HIGH_BIT.
121 */
122 public static final int MAX_BUTTONS_SUPPORTED = 20;
123
124 /**
125 * Creates and initializes EventQueue instance for the specified
126 * AppContext.
127 * Note that event queue must be created from createNewAppContext()
128 * only in order to ensure that EventQueue constructor obtains
129 * the correct AppContext.
130 * @param appContext AppContext to associate with the event queue
131 */
132 private static void initEQ(AppContext appContext) {
133 EventQueue eventQueue = new EventQueue();
134 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
135
136 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
137 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
138 }
139
140 public SunToolkit() {
141 }
142
143 public boolean useBufferPerWindow() {
144 return false;
145 }
146
147 public abstract FramePeer createLightweightFrame(LightweightFrame target)
148 throws HeadlessException;
149
150 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
151 throws HeadlessException, AWTException;
152
153 public abstract SystemTrayPeer createSystemTray(SystemTray target);
154
155 public abstract boolean isTraySupported();
156
157 @Override
158 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
159 throws HeadlessException;
160
161 /**
162 * The AWT lock is typically only used on Unix platforms to synchronize
163 * access to Xlib, OpenGL, etc. However, these methods are implemented
164 * in SunToolkit so that they can be called from shared code (e.g.
165 * from the OGL pipeline) or from the X11 pipeline regardless of whether
166 * XToolkit or MToolkit is currently in use. There are native macros
167 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
168 * methods is changed, make sure it is compatible with the native macros.
169 *
170 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
171 * used in place of:
172 * synchronized (getAWTLock()) {
173 * ...
174 * }
175 *
176 * By factoring these methods out specially, we are able to change the
177 * implementation of these methods (e.g. use more advanced locking
178 * mechanisms) without impacting calling code.
179 *
180 * Sample usage:
181 * private void doStuffWithXlib() {
182 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
183 * SunToolkit.awtLock();
184 * try {
185 * ...
186 * XlibWrapper.XDoStuff();
187 * } finally {
188 * SunToolkit.awtUnlock();
189 * }
190 * }
191 */
192
193 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
194 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
195
196 public static final void awtLock() {
197 AWT_LOCK.lock();
198 }
199
200 public static final boolean awtTryLock() {
201 return AWT_LOCK.tryLock();
202 }
203
204 public static final void awtUnlock() {
205 AWT_LOCK.unlock();
206 }
207
208 public static final void awtLockWait()
209 throws InterruptedException
210 {
211 AWT_LOCK_COND.await();
212 }
213
214 public static final void awtLockWait(long timeout)
215 throws InterruptedException
216 {
217 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
218 }
219
220 public static final void awtLockNotify() {
221 AWT_LOCK_COND.signal();
222 }
223
224 public static final void awtLockNotifyAll() {
225 AWT_LOCK_COND.signalAll();
226 }
227
228 public static final boolean isAWTLockHeldByCurrentThread() {
229 return AWT_LOCK.isHeldByCurrentThread();
230 }
231
232 /*
233 * Create a new AppContext, along with its EventQueue, for a
234 * new ThreadGroup. Browser code, for example, would use this
235 * method to create an AppContext & EventQueue for an Applet.
236 */
237 public static AppContext createNewAppContext() {
238 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
239 return createNewAppContext(threadGroup);
240 }
241
242 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
243 // Create appContext before initialization of EventQueue, so all
244 // the calls to AppContext.getAppContext() from EventQueue ctor
245 // return correct values
246 AppContext appContext = new AppContext(threadGroup);
247 initEQ(appContext);
248
249 return appContext;
250 }
251
252 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
253 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
254 }
255
256 /*
257 * Fetch the peer associated with the given target (as specified
258 * in the peer creation method). This can be used to determine
259 * things like what the parent peer is. If the target is null
260 * or the target can't be found (either because the a peer was
261 * never created for it or the peer was disposed), a null will
262 * be returned.
263 */
264 protected static Object targetToPeer(Object target) {
265 if (target != null && !GraphicsEnvironment.isHeadless()) {
266 return AWTAutoShutdown.getInstance().getPeer(target);
267 }
268 return null;
269 }
270
271 protected static void targetCreatedPeer(Object target, Object peer) {
272 if (target != null && peer != null &&
273 !GraphicsEnvironment.isHeadless())
274 {
275 AWTAutoShutdown.getInstance().registerPeer(target, peer);
276 }
277 }
278
279 protected static void targetDisposedPeer(Object target, Object peer) {
280 if (target != null && peer != null &&
281 !GraphicsEnvironment.isHeadless())
282 {
283 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
284 }
285 }
286
287 // Maps from non-Component/MenuComponent to AppContext.
288 // WeakHashMap<Component,AppContext>
289 private static final Map<Object, AppContext> appContextMap =
290 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>());
291
292 /**
293 * Sets the appContext field of target. If target is not a Component or
294 * MenuComponent, this returns false.
295 */
296 private static boolean setAppContext(Object target,
297 AppContext context) {
298 if (target instanceof Component) {
299 AWTAccessor.getComponentAccessor().
300 setAppContext((Component)target, context);
301 } else if (target instanceof MenuComponent) {
302 AWTAccessor.getMenuComponentAccessor().
303 setAppContext((MenuComponent)target, context);
304 } else {
305 return false;
306 }
307 return true;
308 }
309
310 /**
311 * Returns the appContext field for target. If target is not a
312 * Component or MenuComponent this returns null.
313 */
314 private static AppContext getAppContext(Object target) {
315 if (target instanceof Component) {
316 return AWTAccessor.getComponentAccessor().
317 getAppContext((Component)target);
318 } else if (target instanceof MenuComponent) {
319 return AWTAccessor.getMenuComponentAccessor().
320 getAppContext((MenuComponent)target);
321 } else {
322 return null;
323 }
324 }
325
326 /*
327 * Fetch the AppContext associated with the given target.
328 * This can be used to determine things like which EventQueue
329 * to use for posting events to a Component. If the target is
330 * null or the target can't be found, a null with be returned.
331 */
332 public static AppContext targetToAppContext(Object target) {
333 if (target == null) {
334 return null;
335 }
336 AppContext context = getAppContext(target);
337 if (context == null) {
338 // target is not a Component/MenuComponent, try the
339 // appContextMap.
340 context = appContextMap.get(target);
341 }
342 return context;
343 }
344
345 /**
346 * Sets the synchronous status of focus requests on lightweight
347 * components in the specified window to the specified value.
348 * If the boolean parameter is {@code true} then the focus
349 * requests on lightweight components will be performed
350 * synchronously, if it is {@code false}, then asynchronously.
351 * By default, all windows have their lightweight request status
352 * set to asynchronous.
353 * <p>
354 * The application can only set the status of lightweight focus
355 * requests to synchronous for any of its windows if it doesn't
356 * perform focus transfers between different heavyweight containers.
357 * In this case the observable focus behaviour is the same as with
358 * asynchronous status.
359 * <p>
360 * If the application performs focus transfer between different
361 * heavyweight containers and sets the lightweight focus request
362 * status to synchronous for any of its windows, then further focus
363 * behaviour is unspecified.
364 * <p>
365 * @param changed the window for which the lightweight focus request
366 * status should be set
367 * @param status the value of lightweight focus request status
368 */
369
370 public static void setLWRequestStatus(Window changed,boolean status){
371 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
372 };
373
374 public static void checkAndSetPolicy(Container cont) {
375 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
376 getCurrentKeyboardFocusManager().
377 getDefaultFocusTraversalPolicy();
378
379 cont.setFocusTraversalPolicy(defaultPolicy);
380 }
381
382 /*
383 * Insert a mapping from target to AppContext, for later retrieval
384 * via targetToAppContext() above.
385 */
386 public static void insertTargetMapping(Object target, AppContext appContext) {
387 if (!setAppContext(target, appContext)) {
388 // Target is not a Component/MenuComponent, use the private Map
389 // instead.
390 appContextMap.put(target, appContext);
391 }
392 }
393
394 /*
395 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
396 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
397 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
398 * not be called under another lock since it locks the EventQueue.
399 * See bugids 4632918, 4526597.
400 */
401 public static void postEvent(AppContext appContext, AWTEvent event) {
402 if (event == null) {
403 throw new NullPointerException();
404 }
405
406 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
407 if (sea != null && sea.isSequencedEvent(event)) {
408 AWTEvent nested = sea.getNested(event);
409 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
410 nested instanceof TimedWindowEvent)
411 {
412 TimedWindowEvent twe = (TimedWindowEvent)nested;
413 ((SunToolkit)Toolkit.getDefaultToolkit()).
414 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
415 }
416 }
417
418 // All events posted via this method are system-generated.
419 // Placing the following call here reduces considerably the
420 // number of places throughout the toolkit that would
421 // otherwise have to be modified to precisely identify
422 // system-generated events.
423 setSystemGenerated(event);
424 AppContext eventContext = targetToAppContext(event.getSource());
425 if (eventContext != null && !eventContext.equals(appContext)) {
426 throw new RuntimeException("Event posted on wrong app context : " + event);
427 }
428 PostEventQueue postEventQueue =
429 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
430 if (postEventQueue != null) {
431 postEventQueue.postEvent(event);
432 }
433 }
434
435 /*
436 * Post AWTEvent of high priority.
437 */
438 public static void postPriorityEvent(final AWTEvent e) {
439 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
440 @Override
441 public void run() {
442 AWTAccessor.getAWTEventAccessor().setPosted(e);
443 ((Component)e.getSource()).dispatchEvent(e);
444 }
445 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
446 postEvent(targetToAppContext(e.getSource()), pe);
447 }
448
449 /*
450 * Flush any pending events which haven't been posted to the AWT
451 * EventQueue yet.
452 */
453 public static void flushPendingEvents() {
454 AppContext appContext = AppContext.getAppContext();
455 flushPendingEvents(appContext);
456 }
457
458 /*
459 * Flush the PostEventQueue for the right AppContext.
460 * The default flushPendingEvents only flushes the thread-local context,
461 * which is not always correct, c.f. 3746956
462 */
463 public static void flushPendingEvents(AppContext appContext) {
464 PostEventQueue postEventQueue =
465 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
466 if (postEventQueue != null) {
467 postEventQueue.flush();
468 }
469 }
470
471 /*
472 * Execute a chunk of code on the Java event handler thread for the
473 * given target. Does not wait for the execution to occur before
474 * returning to the caller.
475 */
476 public static void executeOnEventHandlerThread(Object target,
477 Runnable runnable) {
478 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
479 }
480
481 /*
482 * Fixed 5064013: the InvocationEvent time should be equals
483 * the time of the ActionEvent
484 */
485 @SuppressWarnings("serial")
486 public static void executeOnEventHandlerThread(Object target,
487 Runnable runnable,
488 final long when) {
489 executeOnEventHandlerThread(
490 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
491 @Override
492 public long getWhen() {
493 return when;
494 }
495 });
496 }
497
498 /*
499 * Execute a chunk of code on the Java event handler thread for the
500 * given target. Does not wait for the execution to occur before
501 * returning to the caller.
502 */
503 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
504 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
505 }
506
507 /*
508 * Execute a chunk of code on the Java event handler thread. The
509 * method takes into account provided AppContext and sets
510 * {@code SunToolkit.getDefaultToolkit()} as a target of the
511 * event. See 6451487 for detailes.
512 * Does not wait for the execution to occur before returning to
513 * the caller.
514 */
515 public static void invokeLaterOnAppContext(
516 AppContext appContext, Runnable dispatcher)
517 {
518 postEvent(appContext,
519 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
520 PeerEvent.PRIORITY_EVENT));
521 }
522
523 /*
524 * Execute a chunk of code on the Java event handler thread for the
525 * given target. Waits for the execution to occur before returning
526 * to the caller.
527 */
528 public static void executeOnEDTAndWait(Object target, Runnable runnable)
529 throws InterruptedException, InvocationTargetException
530 {
531 if (EventQueue.isDispatchThread()) {
532 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
533 }
534
535 class AWTInvocationLock {}
536 Object lock = new AWTInvocationLock();
537
538 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
539
540 synchronized (lock) {
541 executeOnEventHandlerThread(event);
542 while(!event.isDispatched()) {
543 lock.wait();
544 }
545 }
546
547 Throwable eventThrowable = event.getThrowable();
548 if (eventThrowable != null) {
549 throw new InvocationTargetException(eventThrowable);
550 }
551 }
552
553 /*
554 * Returns true if the calling thread is the event dispatch thread
555 * contained within AppContext which associated with the given target.
556 * Use this call to ensure that a given task is being executed
557 * (or not being) on the event dispatch thread for the given target.
558 */
559 public static boolean isDispatchThreadForAppContext(Object target) {
560 AppContext appContext = targetToAppContext(target);
561 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
562
563 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
564 return accessor.isDispatchThreadImpl(eq);
565 }
566
567 @Override
568 public Dimension getScreenSize() {
569 return GraphicsEnvironment.getLocalGraphicsEnvironment()
570 .getDefaultScreenDevice().getDefaultConfiguration()
571 .getBounds().getSize();
572 }
573
574 @Override
575 public ColorModel getColorModel() throws HeadlessException {
576 return GraphicsEnvironment.getLocalGraphicsEnvironment()
577 .getDefaultScreenDevice().getDefaultConfiguration()
578 .getColorModel();
579 }
580
581 @Override
582 @SuppressWarnings("deprecation")
583 public FontMetrics getFontMetrics(Font font) {
584 return FontDesignMetrics.getMetrics(font);
585 }
586
587 @Override
588 @SuppressWarnings("deprecation")
589 public String[] getFontList() {
590 String[] hardwiredFontList = {
591 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
592 Font.DIALOG_INPUT
593
594 // -- Obsolete font names from 1.0.2. It was decided that
595 // -- getFontList should not return these old names:
596 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
597 };
598 return hardwiredFontList;
599 }
600
601 /**
602 * Disables erasing of background on the canvas before painting if
603 * this is supported by the current toolkit. It is recommended to
604 * call this method early, before the Canvas becomes displayable,
605 * because some Toolkit implementations do not support changing
606 * this property once the Canvas becomes displayable.
607 */
608 public void disableBackgroundErase(Canvas canvas) {
609 disableBackgroundEraseImpl(canvas);
610 }
611
612 /**
613 * Disables the native erasing of the background on the given
614 * component before painting if this is supported by the current
615 * toolkit. This only has an effect for certain components such as
616 * Canvas, Panel and Window. It is recommended to call this method
617 * early, before the Component becomes displayable, because some
618 * Toolkit implementations do not support changing this property
619 * once the Component becomes displayable.
620 */
621 public void disableBackgroundErase(Component component) {
622 disableBackgroundEraseImpl(component);
623 }
624
625 private void disableBackgroundEraseImpl(Component component) {
626 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
627 }
628
629 /**
630 * Returns the value of "sun.awt.noerasebackground" property. Default
631 * value is {@code false}.
632 */
633 public static boolean getSunAwtNoerasebackground() {
634 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
635 }
636
637 /**
638 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
639 * value is {@code false}.
640 */
641 public static boolean getSunAwtErasebackgroundonresize() {
642 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
643 }
644
645
646 @SuppressWarnings("deprecation")
647 static final SoftCache fileImgCache = new SoftCache();
648
649 @SuppressWarnings("deprecation")
650 static final SoftCache urlImgCache = new SoftCache();
651
652 static Image getImageFromHash(Toolkit tk, URL url) {
653 checkPermissions(url);
654 synchronized (urlImgCache) {
655 String key = url.toString();
656 Image img = (Image)urlImgCache.get(key);
657 if (img == null) {
658 try {
659 img = tk.createImage(new URLImageSource(url));
660 urlImgCache.put(key, img);
661 } catch (Exception e) {
662 }
663 }
664 return img;
665 }
666 }
667
668 static Image getImageFromHash(Toolkit tk,
669 String filename) {
670 checkPermissions(filename);
671 synchronized (fileImgCache) {
672 Image img = (Image)fileImgCache.get(filename);
673 if (img == null) {
674 try {
675 img = tk.createImage(new FileImageSource(filename));
676 fileImgCache.put(filename, img);
677 } catch (Exception e) {
678 }
679 }
680 return img;
681 }
682 }
683
684 @Override
685 public Image getImage(String filename) {
686 return getImageFromHash(this, filename);
687 }
688
689 @Override
690 public Image getImage(URL url) {
691 return getImageFromHash(this, url);
692 }
693
694 protected Image getImageWithResolutionVariant(String fileName,
695 String resolutionVariantName) {
696 synchronized (fileImgCache) {
697 Image image = getImageFromHash(this, fileName);
698 if (image instanceof MultiResolutionImage) {
699 return image;
700 }
701 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
702 image = createImageWithResolutionVariant(image, resolutionVariant);
703 fileImgCache.put(fileName, image);
704 return image;
705 }
706 }
707
708 protected Image getImageWithResolutionVariant(URL url,
709 URL resolutionVariantURL) {
710 synchronized (urlImgCache) {
711 Image image = getImageFromHash(this, url);
712 if (image instanceof MultiResolutionImage) {
713 return image;
714 }
715 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
716 image = createImageWithResolutionVariant(image, resolutionVariant);
717 String key = url.toString();
718 urlImgCache.put(key, image);
719 return image;
720 }
721 }
722
723
724 @Override
725 public Image createImage(String filename) {
726 checkPermissions(filename);
727 return createImage(new FileImageSource(filename));
728 }
729
730 @Override
731 public Image createImage(URL url) {
732 checkPermissions(url);
733 return createImage(new URLImageSource(url));
734 }
735
736 @Override
737 public Image createImage(byte[] data, int offset, int length) {
738 return createImage(new ByteArrayImageSource(data, offset, length));
739 }
740
741 @Override
742 public Image createImage(ImageProducer producer) {
743 return new ToolkitImage(producer);
744 }
745
746 public static Image createImageWithResolutionVariant(Image image,
747 Image resolutionVariant) {
748 return new MultiResolutionToolkitImage(image, resolutionVariant);
749 }
750
751 @Override
752 public int checkImage(Image img, int w, int h, ImageObserver o) {
753 if (!(img instanceof ToolkitImage)) {
754 return ImageObserver.ALLBITS;
755 }
756
757 ToolkitImage tkimg = (ToolkitImage)img;
758 int repbits;
759 if (w == 0 || h == 0) {
760 repbits = ImageObserver.ALLBITS;
761 } else {
762 repbits = tkimg.getImageRep().check(o);
763 }
764 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
765 }
766
767 @Override
768 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
769 if (w == 0 || h == 0) {
770 return true;
771 }
772
773 // Must be a ToolkitImage
774 if (!(img instanceof ToolkitImage)) {
775 return true;
776 }
777
778 ToolkitImage tkimg = (ToolkitImage)img;
779 if (tkimg.hasError()) {
780 if (o != null) {
781 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
782 -1, -1, -1, -1);
783 }
784 return false;
785 }
786 ImageRepresentation ir = tkimg.getImageRep();
787 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
788 }
789
790 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
791 ToolkitImage rvImage = getResolutionVariant(img);
792 int rvw = getRVSize(w);
793 int rvh = getRVSize(h);
794 // Ignore the resolution variant in case of error
795 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
796 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
797 getResolutionVariantObserver(
798 img, o, w, h, rvw, rvh, true));
799 }
800
801 private boolean prepareResolutionVariant(Image img, int w, int h,
802 ImageObserver o) {
803
804 ToolkitImage rvImage = getResolutionVariant(img);
805 int rvw = getRVSize(w);
806 int rvh = getRVSize(h);
807 // Ignore the resolution variant in case of error
808 return rvImage == null || rvImage.hasError() || prepareImage(
809 rvImage, rvw, rvh,
810 MultiResolutionToolkitImage.getResolutionVariantObserver(
811 img, o, w, h, rvw, rvh, true));
812 }
813
814 private static int getRVSize(int size){
815 return size == -1 ? -1 : 2 * size;
816 }
817
818 private static ToolkitImage getResolutionVariant(Image image) {
819 if (image instanceof MultiResolutionToolkitImage) {
820 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
821 getResolutionVariant();
822 if (resolutionVariant instanceof ToolkitImage) {
823 return (ToolkitImage) resolutionVariant;
824 }
825 }
826 return null;
827 }
828
829 protected static boolean imageCached(String fileName) {
830 return fileImgCache.containsKey(fileName);
831 }
832
833 protected static boolean imageCached(URL url) {
834 String key = url.toString();
835 return urlImgCache.containsKey(key);
836 }
837
838 protected static boolean imageExists(String filename) {
839 if (filename != null) {
840 checkPermissions(filename);
841 return new File(filename).exists();
842 }
843 return false;
844 }
845
846 @SuppressWarnings("try")
847 protected static boolean imageExists(URL url) {
848 if (url != null) {
849 checkPermissions(url);
850 try (InputStream is = url.openStream()) {
851 return true;
852 }catch(IOException e){
853 return false;
854 }
855 }
856 return false;
857 }
858
859 private static void checkPermissions(String filename) {
860 SecurityManager security = System.getSecurityManager();
861 if (security != null) {
862 security.checkRead(filename);
863 }
864 }
865
866 private static void checkPermissions(URL url) {
867 SecurityManager sm = System.getSecurityManager();
868 if (sm != null) {
869 try {
870 java.security.Permission perm =
871 URLUtil.getConnectPermission(url);
872 if (perm != null) {
873 try {
874 sm.checkPermission(perm);
875 } catch (SecurityException se) {
876 // fallback to checkRead/checkConnect for pre 1.2
877 // security managers
878 if ((perm instanceof java.io.FilePermission) &&
879 perm.getActions().indexOf("read") != -1) {
880 sm.checkRead(perm.getName());
881 } else if ((perm instanceof
882 java.net.SocketPermission) &&
883 perm.getActions().indexOf("connect") != -1) {
884 sm.checkConnect(url.getHost(), url.getPort());
885 } else if (perm instanceof URLPermission) {
886 sm.checkPermission(
887 new SocketPermission(url.getHost(), "connect"));
888 } else {
889 throw se;
890 }
891 }
892 }
893 } catch (java.io.IOException ioe) {
894 sm.checkConnect(url.getHost(), url.getPort());
895 }
896 }
897 }
898
899 /**
900 * Scans {@code imageList} for best-looking image of specified dimensions.
901 * Image can be scaled and/or padded with transparency.
902 */
903 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
904 if (width == 0 || height == 0) {
905 return null;
906 }
907 java.util.List<Image> multiResAndnormalImages = new ArrayList<>(imageList.size());
908 for (Image image : imageList) {
909 if ((image instanceof MultiResolutionImage)) {
910 Image im = ((MultiResolutionImage) image).getResolutionVariant(width, height);
911 multiResAndnormalImages.add(im);
912 } else {
913 multiResAndnormalImages.add(image);
914 }
915 }
916 Image bestImage = null;
917 int bestWidth = 0;
918 int bestHeight = 0;
919 double bestSimilarity = 3; //Impossibly high value
920 double bestScaleFactor = 0;
921 for (Iterator<Image> i = multiResAndnormalImages.iterator();i.hasNext();) {
922 //Iterate imageList looking for best matching image.
923 //'Similarity' measure is defined as good scale factor and small insets.
924 //best possible similarity is 0 (no scale, no insets).
925 //It's found while the experiments that good-looking result is achieved
926 //with scale factors x1, x3/4, x2/3, xN, x1/N.
927 Image im = i.next();
928 if (im == null) {
929 continue;
930 }
931 if (im instanceof ToolkitImage) {
932 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
933 ir.reconstruct(ImageObserver.ALLBITS);
934 }
935 int iw;
936 int ih;
937 try {
938 iw = im.getWidth(null);
939 ih = im.getHeight(null);
940 } catch (Exception e){
941 continue;
942 }
943 if (iw > 0 && ih > 0) {
944 //Calc scale factor
945 double scaleFactor = Math.min((double)width / (double)iw,
946 (double)height / (double)ih);
947 //Calculate scaled image dimensions
948 //adjusting scale factor to nearest "good" value
949 int adjw = 0;
950 int adjh = 0;
951 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
952 if (scaleFactor >= 2) {
953 //Need to enlarge image more than twice
954 //Round down scale factor to multiply by integer value
955 scaleFactor = Math.floor(scaleFactor);
956 adjw = iw * (int)scaleFactor;
957 adjh = ih * (int)scaleFactor;
958 scaleMeasure = 1.0 - 0.5 / scaleFactor;
959 } else if (scaleFactor >= 1) {
960 //Don't scale
961 scaleFactor = 1.0;
962 adjw = iw;
963 adjh = ih;
964 scaleMeasure = 0;
965 } else if (scaleFactor >= 0.75) {
966 //Multiply by 3/4
967 scaleFactor = 0.75;
968 adjw = iw * 3 / 4;
969 adjh = ih * 3 / 4;
970 scaleMeasure = 0.3;
971 } else if (scaleFactor >= 0.6666) {
972 //Multiply by 2/3
973 scaleFactor = 0.6666;
974 adjw = iw * 2 / 3;
975 adjh = ih * 2 / 3;
976 scaleMeasure = 0.33;
977 } else {
978 //Multiply size by 1/scaleDivider
979 //where scaleDivider is minimum possible integer
980 //larger than 1/scaleFactor
981 double scaleDivider = Math.ceil(1.0 / scaleFactor);
982 scaleFactor = 1.0 / scaleDivider;
983 adjw = (int)Math.round((double)iw / scaleDivider);
984 adjh = (int)Math.round((double)ih / scaleDivider);
985 scaleMeasure = 1.0 - 1.0 / scaleDivider;
986 }
987 double similarity = ((double)width - (double)adjw) / (double)width +
988 ((double)height - (double)adjh) / (double)height + //Large padding is bad
989 scaleMeasure; //Large rescale is bad
990 if (similarity < bestSimilarity) {
991 bestSimilarity = similarity;
992 bestScaleFactor = scaleFactor;
993 bestImage = im;
994 bestWidth = adjw;
995 bestHeight = adjh;
996 }
997 if (similarity == 0) break;
998 }
999 }
1000 if (bestImage == null) {
1001 //No images were found, possibly all are broken
1002 return null;
1003 }
1004 BufferedImage bimage =
1005 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1006 Graphics2D g = bimage.createGraphics();
1007 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1008 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1009 try {
1010 int x = (width - bestWidth) / 2;
1011 int y = (height - bestHeight) / 2;
1012 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1013 } finally {
1014 g.dispose();
1015 }
1016 return bimage;
1017 }
1018
1019 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1020 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1021 if (bimage == null) {
1022 return null;
1023 }
1024 Raster raster = bimage.getRaster();
1025 DataBuffer buffer = raster.getDataBuffer();
1026 return (DataBufferInt)buffer;
1027 }
1028
1029 @Override
1030 protected EventQueue getSystemEventQueueImpl() {
1031 return getSystemEventQueueImplPP();
1032 }
1033
1034 // Package private implementation
1035 static EventQueue getSystemEventQueueImplPP() {
1036 return getSystemEventQueueImplPP(AppContext.getAppContext());
1037 }
1038
1039 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1040 EventQueue theEventQueue =
1041 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1042 return theEventQueue;
1043 }
1044
1045 /**
1046 * Give native peers the ability to query the native container
1047 * given a native component (eg the direct parent may be lightweight).
1048 */
1049 public static Container getNativeContainer(Component c) {
1050 return Toolkit.getNativeContainer(c);
1051 }
1052
1053 /**
1054 * Gives native peers the ability to query the closest HW component.
1055 * If the given component is heavyweight, then it returns this. Otherwise,
1056 * it goes one level up in the hierarchy and tests next component.
1057 */
1058 public static Component getHeavyweightComponent(Component c) {
1059 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1060 c = AWTAccessor.getComponentAccessor().getParent(c);
1061 }
1062 return c;
1063 }
1064
1065 /**
1066 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1067 */
1068 @SuppressWarnings("deprecation")
1069 public int getFocusAcceleratorKeyMask() {
1070 return InputEvent.ALT_MASK;
1071 }
1072
1073 /**
1074 * Tests whether specified key modifiers mask can be used to enter a printable
1075 * character. This is a default implementation of this method, which reflects
1076 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1077 * characters from the extended character set (like euro sign or math symbols)
1078 */
1079 @SuppressWarnings("deprecation")
1080 public boolean isPrintableCharacterModifiersMask(int mods) {
1081 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1082 }
1083
1084 /**
1085 * Returns whether popup is allowed to be shown above the task bar.
1086 * This is a default implementation of this method, which checks
1087 * corresponding security permission.
1088 */
1089 public boolean canPopupOverlapTaskBar() {
1090 boolean result = true;
1091 try {
1092 SecurityManager sm = System.getSecurityManager();
1093 if (sm != null) {
1094 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1095 }
1096 } catch (SecurityException se) {
1097 // There is no permission to show popups over the task bar
1098 result = false;
1099 }
1100 return result;
1101 }
1102
1103 /**
1104 * Returns a new input method window, with behavior as specified in
1105 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1106 * If the inputContext is not null, the window should return it from its
1107 * getInputContext() method. The window needs to implement
1108 * sun.awt.im.InputMethodWindow.
1109 * <p>
1110 * SunToolkit subclasses can override this method to return better input
1111 * method windows.
1112 */
1113 @Override
1114 public Window createInputMethodWindow(String title, InputContext context) {
1115 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1116 }
1117
1118 /**
1119 * Returns whether enableInputMethods should be set to true for peered
1120 * TextComponent instances on this platform. False by default.
1121 */
1122 @Override
1123 public boolean enableInputMethodsForTextComponent() {
1124 return false;
1125 }
1126
1127 private static Locale startupLocale = null;
1128
1129 /**
1130 * Returns the locale in which the runtime was started.
1131 */
1132 public static Locale getStartupLocale() {
1133 if (startupLocale == null) {
1134 String language, region, country, variant;
1135 language = AccessController.doPrivileged(
1136 new GetPropertyAction("user.language", "en"));
1137 // for compatibility, check for old user.region property
1138 region = AccessController.doPrivileged(
1139 new GetPropertyAction("user.region"));
1140 if (region != null) {
1141 // region can be of form country, country_variant, or _variant
1142 int i = region.indexOf('_');
1143 if (i >= 0) {
1144 country = region.substring(0, i);
1145 variant = region.substring(i + 1);
1146 } else {
1147 country = region;
1148 variant = "";
1149 }
1150 } else {
1151 country = AccessController.doPrivileged(
1152 new GetPropertyAction("user.country", ""));
1153 variant = AccessController.doPrivileged(
1154 new GetPropertyAction("user.variant", ""));
1155 }
1156 startupLocale = new Locale(language, country, variant);
1157 }
1158 return startupLocale;
1159 }
1160
1161 /**
1162 * Returns the default keyboard locale of the underlying operating system
1163 */
1164 @Override
1165 public Locale getDefaultKeyboardLocale() {
1166 return getStartupLocale();
1167 }
1168
1169 /**
1170 * Returns whether default toolkit needs the support of the xembed
1171 * from embedding host(if any).
1172 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1173 */
1174 public static boolean needsXEmbed() {
1175 String noxembed = AccessController.
1176 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1177 if ("true".equals(noxembed)) {
1178 return false;
1179 }
1180
1181 Toolkit tk = Toolkit.getDefaultToolkit();
1182 if (tk instanceof SunToolkit) {
1183 // SunToolkit descendants should override this method to specify
1184 // concrete behavior
1185 return ((SunToolkit)tk).needsXEmbedImpl();
1186 } else {
1187 // Non-SunToolkit doubtly might support XEmbed
1188 return false;
1189 }
1190 }
1191
1192 /**
1193 * Returns whether this toolkit needs the support of the xembed
1194 * from embedding host(if any).
1195 * @return {@code true}, if XEmbed is needed, {@code false} otherwise
1196 */
1197 protected boolean needsXEmbedImpl() {
1198 return false;
1199 }
1200
1201 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1202
1203 /**
1204 * Returns whether the XEmbed server feature is requested by
1205 * developer. If true, Toolkit should return an
1206 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1207 */
1208 protected final boolean isXEmbedServerRequested() {
1209 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1210 }
1211
1212 /**
1213 * Returns whether the modal exclusion API is supported by the current toolkit.
1214 * When it isn't supported, calling {@code setModalExcluded} has no
1215 * effect, and {@code isModalExcluded} returns false for all windows.
1216 *
1217 * @return true if modal exclusion is supported by the toolkit, false otherwise
1218 *
1219 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1220 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1221 *
1222 * @since 1.5
1223 */
1224 public static boolean isModalExcludedSupported()
1225 {
1226 Toolkit tk = Toolkit.getDefaultToolkit();
1227 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1228 }
1229 /*
1230 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1231 *
1232 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1233 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1234 *
1235 * @since 1.5
1236 */
1237 protected boolean isModalExcludedSupportedImpl()
1238 {
1239 return false;
1240 }
1241
1242 /*
1243 * Sets this window to be excluded from being modally blocked. When the
1244 * toolkit supports modal exclusion and this method is called, input
1245 * events, focus transfer and z-order will continue to work for the
1246 * window, it's owned windows and child components, even in the
1247 * presence of a modal dialog.
1248 * For details on which {@code Window}s are normally blocked
1249 * by modal dialog, see {@link java.awt.Dialog}.
1250 * Invoking this method when the modal exclusion API is not supported by
1251 * the current toolkit has no effect.
1252 * @param window Window to be marked as not modally blocked
1253 * @see java.awt.Dialog
1254 * @see java.awt.Dialog#setModal(boolean)
1255 * @see sun.awt.SunToolkit#isModalExcludedSupported
1256 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1257 */
1258 public static void setModalExcluded(Window window)
1259 {
1260 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1261 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1262 }
1263 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1264 }
1265
1266 /*
1267 * Returns whether the specified window is blocked by modal dialogs.
1268 * If the modal exclusion API isn't supported by the current toolkit,
1269 * it returns false for all windows.
1270 *
1271 * @param window Window to test for modal exclusion
1272 *
1273 * @return true if the window is modal excluded, false otherwise. If
1274 * the modal exclusion isn't supported by the current Toolkit, false
1275 * is returned
1276 *
1277 * @see sun.awt.SunToolkit#isModalExcludedSupported
1278 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1279 *
1280 * @since 1.5
1281 */
1282 public static boolean isModalExcluded(Window window)
1283 {
1284 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1285 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1286 }
1287 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1288 }
1289
1290 /**
1291 * Overridden in XToolkit and WToolkit
1292 */
1293 @Override
1294 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1295 return (modalityType == Dialog.ModalityType.MODELESS) ||
1296 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1297 }
1298
1299 /**
1300 * Overridden in XToolkit and WToolkit
1301 */
1302 @Override
1303 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1304 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1305 }
1306
1307 ///////////////////////////////////////////////////////////////////////////
1308 //
1309 // The following is used by the Java Plug-in to coordinate dialog modality
1310 // between containing applications (browsers, ActiveX containers etc) and
1311 // the AWT.
1312 //
1313 ///////////////////////////////////////////////////////////////////////////
1314
1315 private ModalityListenerList modalityListeners = new ModalityListenerList();
1316
1317 public void addModalityListener(ModalityListener listener) {
1318 modalityListeners.add(listener);
1319 }
1320
1321 public void removeModalityListener(ModalityListener listener) {
1322 modalityListeners.remove(listener);
1323 }
1324
1325 public void notifyModalityPushed(Dialog dialog) {
1326 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1327 }
1328
1329 public void notifyModalityPopped(Dialog dialog) {
1330 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1331 }
1332
1333 final void notifyModalityChange(int id, Dialog source) {
1334 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1335 ev.dispatch();
1336 }
1337
1338 static class ModalityListenerList implements ModalityListener {
1339
1340 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1341
1342 void add(ModalityListener listener) {
1343 listeners.addElement(listener);
1344 }
1345
1346 void remove(ModalityListener listener) {
1347 listeners.removeElement(listener);
1348 }
1349
1350 @Override
1351 public void modalityPushed(ModalityEvent ev) {
1352 Iterator<ModalityListener> it = listeners.iterator();
1353 while (it.hasNext()) {
1354 it.next().modalityPushed(ev);
1355 }
1356 }
1357
1358 @Override
1359 public void modalityPopped(ModalityEvent ev) {
1360 Iterator<ModalityListener> it = listeners.iterator();
1361 while (it.hasNext()) {
1362 it.next().modalityPopped(ev);
1363 }
1364 }
1365 } // end of class ModalityListenerList
1366
1367 ///////////////////////////////////////////////////////////////////////////
1368 // End Plug-in code
1369 ///////////////////////////////////////////////////////////////////////////
1370
1371 public static boolean isLightweightOrUnknown(Component comp) {
1372 if (comp.isLightweight()
1373 || !(getDefaultToolkit() instanceof SunToolkit))
1374 {
1375 return true;
1376 }
1377 return !(comp instanceof Button
1378 || comp instanceof Canvas
1379 || comp instanceof Checkbox
1380 || comp instanceof Choice
1381 || comp instanceof Label
1382 || comp instanceof java.awt.List
1383 || comp instanceof Panel
1384 || comp instanceof Scrollbar
1385 || comp instanceof ScrollPane
1386 || comp instanceof TextArea
1387 || comp instanceof TextField
1388 || comp instanceof Window);
1389 }
1390
1391 @SuppressWarnings("serial")
1392 public static class OperationTimedOut extends RuntimeException {
1393 public OperationTimedOut(String msg) {
1394 super(msg);
1395 }
1396 public OperationTimedOut() {
1397 }
1398 }
1399
1400 @SuppressWarnings("serial")
1401 public static class InfiniteLoop extends RuntimeException {
1402 }
1403
1404 @SuppressWarnings("serial")
1405 public static class IllegalThreadException extends RuntimeException {
1406 public IllegalThreadException(String msg) {
1407 super(msg);
1408 }
1409 public IllegalThreadException() {
1410 }
1411 }
1412
1413 public static final int DEFAULT_WAIT_TIME = 10000;
1414 private static final int MAX_ITERS = 20;
1415 private static final int MIN_ITERS = 0;
1416 private static final int MINIMAL_EDELAY = 0;
1417
1418 /**
1419 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1420 */
1421 public void realSync() throws OperationTimedOut, InfiniteLoop {
1422 realSync(DEFAULT_WAIT_TIME);
1423 }
1424
1425 /**
1426 * Forces toolkit to synchronize with the native windowing
1427 * sub-system, flushing all pending work and waiting for all the
1428 * events to be processed. This method guarantees that after
1429 * return no additional Java events will be generated, unless
1430 * cause by user. Obviously, the method cannot be used on the
1431 * event dispatch thread (EDT). In case it nevertheless gets
1432 * invoked on this thread, the method throws the
1433 * IllegalThreadException runtime exception.
1434 *
1435 * <p> This method allows to write tests without explicit timeouts
1436 * or wait for some event. Example:
1437 * <pre>{@code
1438 * Frame f = ...;
1439 * f.setVisible(true);
1440 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1441 * }</pre>
1442 *
1443 * <p> After realSync, {@code f} will be completely visible
1444 * on the screen, its getLocationOnScreen will be returning the
1445 * right result and it will be the focus owner.
1446 *
1447 * <p> Another example:
1448 * <pre>{@code
1449 * b.requestFocus();
1450 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1451 * }</pre>
1452 *
1453 * <p> After realSync, {@code b} will be focus owner.
1454 *
1455 * <p> Notice that realSync isn't guaranteed to work if recurring
1456 * actions occur, such as if during processing of some event
1457 * another request which may generate some events occurs. By
1458 * default, sync tries to perform as much as {@value #MAX_ITERS}
1459 * cycles of event processing, allowing for roughly {@value
1460 * #MAX_ITERS} additional requests.
1461 *
1462 * <p> For example, requestFocus() generates native request, which
1463 * generates one or two Java focus events, which then generate a
1464 * serie of paint events, a serie of Java focus events, which then
1465 * generate a serie of paint events which then are processed -
1466 * three cycles, minimum.
1467 *
1468 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1469 */
1470 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1471 {
1472 if (EventQueue.isDispatchThread()) {
1473 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1474 }
1475 int bigLoop = 0;
1476 do {
1477 // Let's do sync first
1478 sync();
1479
1480 // During the wait process, when we were processing incoming
1481 // events, we could have made some new request, which can
1482 // generate new events. Example: MapNotify/XSetInputFocus.
1483 // Therefore, we dispatch them as long as there is something
1484 // to dispatch.
1485 int iters = 0;
1486 while (iters < MIN_ITERS) {
1487 syncNativeQueue(timeout);
1488 iters++;
1489 }
1490 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1491 iters++;
1492 }
1493 if (iters >= MAX_ITERS) {
1494 throw new InfiniteLoop();
1495 }
1496
1497 // native requests were dispatched by X/Window Manager or Windows
1498 // Moreover, we processed them all on Toolkit thread
1499 // Now wait while EDT processes them.
1500 //
1501 // During processing of some events (focus, for example),
1502 // some other events could have been generated. So, after
1503 // waitForIdle, we may end up with full EventQueue
1504 iters = 0;
1505 while (iters < MIN_ITERS) {
1506 waitForIdle(timeout);
1507 iters++;
1508 }
1509 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1510 iters++;
1511 }
1512 if (iters >= MAX_ITERS) {
1513 throw new InfiniteLoop();
1514 }
1515
1516 bigLoop++;
1517 // Again, for Java events, it was simple to check for new Java
1518 // events by checking event queue, but what if Java events
1519 // resulted in native requests? Therefor, check native events again.
1520 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1521 }
1522
1523 /**
1524 * Platform toolkits need to implement this method to perform the
1525 * sync of the native queue. The method should wait until native
1526 * requests are processed, all native events are processed and
1527 * corresponding Java events are generated. Should return
1528 * {@code true} if some events were processed,
1529 * {@code false} otherwise.
1530 */
1531 protected abstract boolean syncNativeQueue(final long timeout);
1532
1533 private boolean eventDispatched;
1534 private boolean queueEmpty;
1535 private final Object waitLock = new Object();
1536
1537 private boolean isEQEmpty() {
1538 EventQueue queue = getSystemEventQueueImpl();
1539 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1540 }
1541
1542 /**
1543 * Waits for the Java event queue to empty. Ensures that all
1544 * events are processed (including paint events), and that if
1545 * recursive events were generated, they are also processed.
1546 * Should return {@code true} if more processing is
1547 * necessary, {@code false} otherwise.
1548 */
1549 @SuppressWarnings("serial")
1550 protected final boolean waitForIdle(final long timeout) {
1551 flushPendingEvents();
1552 final boolean queueWasEmpty;
1553 synchronized (waitLock) {
1554 queueWasEmpty = isEQEmpty();
1555 queueEmpty = false;
1556 eventDispatched = false;
1557 postEvent(AppContext.getAppContext(),
1558 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1559 @Override
1560 public void dispatch() {
1561 // Here we block EDT. It could have some
1562 // events, it should have dispatched them by
1563 // now. So native requests could have been
1564 // generated. First, dispatch them. Then,
1565 // flush Java events again.
1566 int iters = 0;
1567 while (iters < MIN_ITERS) {
1568 syncNativeQueue(timeout);
1569 iters++;
1570 }
1571 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1572 iters++;
1573 }
1574 flushPendingEvents();
1575
1576 synchronized(waitLock) {
1577 queueEmpty = isEQEmpty();
1578 eventDispatched = true;
1579 waitLock.notifyAll();
1580 }
1581 }
1582 });
1583 try {
1584 while (!eventDispatched) {
1585 waitLock.wait();
1586 }
1587 } catch (InterruptedException ie) {
1588 return false;
1589 }
1590 }
1591
1592 try {
1593 Thread.sleep(MINIMAL_EDELAY);
1594 } catch (InterruptedException ie) {
1595 throw new RuntimeException("Interrupted");
1596 }
1597
1598 flushPendingEvents();
1599
1600 // Lock to force write-cache flush for queueEmpty.
1601 synchronized (waitLock) {
1602 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1603 }
1604 }
1605
1606 /**
1607 * Grabs the mouse input for the given window. The window must be
1608 * visible. The window or its children do not receive any
1609 * additional mouse events besides those targeted to them. All
1610 * other events will be dispatched as before - to the respective
1611 * targets. This Window will receive UngrabEvent when automatic
1612 * ungrab is about to happen. The event can be listened to by
1613 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1614 * UngrabEvent class for the list of conditions when ungrab is
1615 * about to happen.
1616 * @see UngrabEvent
1617 */
1618 public abstract void grab(Window w);
1619
1620 /**
1621 * Forces ungrab. No event will be sent.
1622 */
1623 public abstract void ungrab(Window w);
1624
1625 public void showOrHideTouchKeyboard(Component comp, AWTEvent e) {}
1626
1627 private static boolean touchKeyboardAutoShowIsEnabled;
1628
1629 public static boolean isTouchKeyboardAutoShowEnabled() {
1630 return touchKeyboardAutoShowIsEnabled;
1631 }
1632
1633 /**
1634 * Locates the splash screen library in a platform dependent way and closes
1635 * the splash screen. Should be invoked on first top-level frame display.
1636 * @see java.awt.SplashScreen
1637 * @since 1.6
1638 */
1639 public static native void closeSplashScreen();
1640
1641 /* The following methods and variables are to support retrieving
1642 * desktop text anti-aliasing settings
1643 */
1644
1645 /* Need an instance method because setDesktopProperty(..) is protected. */
1646 private void fireDesktopFontPropertyChanges() {
1647 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1648 SunToolkit.getDesktopFontHints());
1649 }
1650
1651 private static boolean checkedSystemAAFontSettings;
1652 private static boolean useSystemAAFontSettings;
1653 private static boolean lastExtraCondition = true;
1654 private static RenderingHints desktopFontHints;
1655
1656 /* Since Swing is the reason for this "extra condition" logic its
1657 * worth documenting it in some detail.
1658 * First, a goal is for Swing and applications to both retrieve and
1659 * use the same desktop property value so that there is complete
1660 * consistency between the settings used by JDK's Swing implementation
1661 * and 3rd party custom Swing components, custom L&Fs and any general
1662 * text rendering that wants to be consistent with these.
1663 * But by default on Solaris & Linux Swing will not use AA text over
1664 * remote X11 display (unless Xrender can be used which is TBD and may not
1665 * always be available anyway) as that is a noticeable performance hit.
1666 * So there needs to be a way to express that extra condition so that
1667 * it is seen by all clients of the desktop property API.
1668 * If this were the only condition it could be handled here as it would
1669 * be the same for any L&F and could reasonably be considered to be
1670 * a static behaviour of those systems.
1671 * But GTK currently has an additional test based on locale which is
1672 * not applied by Metal. So mixing GTK in a few locales with Metal
1673 * would mean the last one wins.
1674 * This could be stored per-app context which would work
1675 * for different applets, but wouldn't help for a single application
1676 * using GTK and some other L&F concurrently.
1677 * But it is expected this will be addressed within GTK and the font
1678 * system so is a temporary and somewhat unlikely harmless corner case.
1679 */
1680 public static void setAAFontSettingsCondition(boolean extraCondition) {
1681 if (extraCondition != lastExtraCondition) {
1682 lastExtraCondition = extraCondition;
1683 if (checkedSystemAAFontSettings) {
1684 /* Someone already asked for this info, under a different
1685 * condition.
1686 * We'll force re-evaluation instead of replicating the
1687 * logic, then notify any listeners of any change.
1688 */
1689 checkedSystemAAFontSettings = false;
1690 Toolkit tk = Toolkit.getDefaultToolkit();
1691 if (tk instanceof SunToolkit) {
1692 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1693 }
1694 }
1695 }
1696 }
1697
1698 /* "false", "off", ""default" aren't explicitly tested, they
1699 * just fall through to produce a null return which all are equated to
1700 * "false".
1701 */
1702 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1703 Object aaHint = null;
1704 hintname = hintname.toLowerCase(Locale.ENGLISH);
1705 if (hintname.equals("on")) {
1706 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1707 } else if (hintname.equals("gasp")) {
1708 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1709 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1710 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1711 } else if (hintname.equals("lcd_hbgr")) {
1712 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1713 } else if (hintname.equals("lcd_vrgb")) {
1714 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1715 } else if (hintname.equals("lcd_vbgr")) {
1716 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1717 }
1718 if (aaHint != null) {
1719 RenderingHints map = new RenderingHints(null);
1720 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1721 return map;
1722 } else {
1723 return null;
1724 }
1725 }
1726
1727 /* This method determines whether to use the system font settings,
1728 * or ignore them if a L&F has specified they should be ignored, or
1729 * to override both of these with a system property specified value.
1730 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1731 * system property isn't applied as desktop properties are considered
1732 * to be inapplicable in that case. In that headless case although
1733 * this method will return "true" the toolkit will return a null map.
1734 */
1735 private static boolean useSystemAAFontSettings() {
1736 if (!checkedSystemAAFontSettings) {
1737 useSystemAAFontSettings = true; /* initially set this true */
1738 String systemAAFonts = null;
1739 Toolkit tk = Toolkit.getDefaultToolkit();
1740 if (tk instanceof SunToolkit) {
1741 systemAAFonts =
1742 AccessController.doPrivileged(
1743 new GetPropertyAction("awt.useSystemAAFontSettings"));
1744 }
1745 if (systemAAFonts != null) {
1746 useSystemAAFontSettings =
1747 Boolean.valueOf(systemAAFonts).booleanValue();
1748 /* If it is anything other than "true", then it may be
1749 * a hint name , or it may be "off, "default", etc.
1750 */
1751 if (!useSystemAAFontSettings) {
1752 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1753 }
1754 }
1755 /* If its still true, apply the extra condition */
1756 if (useSystemAAFontSettings) {
1757 useSystemAAFontSettings = lastExtraCondition;
1758 }
1759 checkedSystemAAFontSettings = true;
1760 }
1761 return useSystemAAFontSettings;
1762 }
1763
1764 /* A variable defined for the convenience of JDK code */
1765 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1766
1767 /* Overridden by subclasses to return platform/desktop specific values */
1768 protected RenderingHints getDesktopAAHints() {
1769 return null;
1770 }
1771
1772 /* Subclass desktop property loading methods call this which
1773 * in turn calls the appropriate subclass implementation of
1774 * getDesktopAAHints() when system settings are being used.
1775 * Its public rather than protected because subclasses may delegate
1776 * to a helper class.
1777 */
1778 public static RenderingHints getDesktopFontHints() {
1779 if (useSystemAAFontSettings()) {
1780 Toolkit tk = Toolkit.getDefaultToolkit();
1781 if (tk instanceof SunToolkit) {
1782 Object map = ((SunToolkit)tk).getDesktopAAHints();
1783 return (RenderingHints)map;
1784 } else { /* Headless Toolkit */
1785 return null;
1786 }
1787 } else if (desktopFontHints != null) {
1788 /* cloning not necessary as the return value is cloned later, but
1789 * its harmless.
1790 */
1791 return (RenderingHints)(desktopFontHints.clone());
1792 } else {
1793 return null;
1794 }
1795 }
1796
1797
1798 public abstract boolean isDesktopSupported();
1799 public abstract boolean isTaskbarSupported();
1800
1801 /*
1802 * consumeNextKeyTyped() method is not currently used,
1803 * however Swing could use it in the future.
1804 */
1805 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1806 try {
1807 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1808 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1809 getCurrentKeyboardFocusManager(),
1810 keyEvent);
1811 } catch (ClassCastException cce) {
1812 cce.printStackTrace();
1813 }
1814 }
1815
1816 protected static void dumpPeers(final PlatformLogger aLog) {
1817 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1818 }
1819
1820 /**
1821 * Returns the {@code Window} ancestor of the component {@code comp}.
1822 * @return Window ancestor of the component or component by itself if it is Window;
1823 * null, if component is not a part of window hierarchy
1824 */
1825 public static Window getContainingWindow(Component comp) {
1826 while (comp != null && !(comp instanceof Window)) {
1827 comp = comp.getParent();
1828 }
1829 return (Window)comp;
1830 }
1831
1832 private static Boolean sunAwtDisableMixing = null;
1833
1834 /**
1835 * Returns the value of "sun.awt.disableMixing" property. Default
1836 * value is {@code false}.
1837 */
1838 public static synchronized boolean getSunAwtDisableMixing() {
1839 if (sunAwtDisableMixing == null) {
1840 sunAwtDisableMixing = AccessController.doPrivileged(
1841 new GetBooleanAction("sun.awt.disableMixing"));
1842 }
1843 return sunAwtDisableMixing.booleanValue();
1844 }
1845
1846 /**
1847 * Returns true if the native GTK libraries are available. The
1848 * default implementation returns false, but UNIXToolkit overrides this
1849 * method to provide a more specific answer.
1850 */
1851 public boolean isNativeGTKAvailable() {
1852 return false;
1853 }
1854
1855 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1856
1857 public synchronized void setWindowDeactivationTime(Window w, long time) {
1858 AppContext ctx = getAppContext(w);
1859 if (ctx == null) {
1860 return;
1861 }
1862 @SuppressWarnings("unchecked")
1863 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1864 if (map == null) {
1865 map = new WeakHashMap<Window, Long>();
1866 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1867 }
1868 map.put(w, time);
1869 }
1870
1871 public synchronized long getWindowDeactivationTime(Window w) {
1872 AppContext ctx = getAppContext(w);
1873 if (ctx == null) {
1874 return -1;
1875 }
1876 @SuppressWarnings("unchecked")
1877 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1878 if (map == null) {
1879 return -1;
1880 }
1881 Long time = map.get(w);
1882 return time == null ? -1 : time;
1883 }
1884
1885 public void updateScreenMenuBarUI() {
1886 }
1887
1888 // Cosntant alpha
1889 public boolean isWindowOpacitySupported() {
1890 return false;
1891 }
1892
1893 // Shaping
1894 public boolean isWindowShapingSupported() {
1895 return false;
1896 }
1897
1898 // Per-pixel alpha
1899 public boolean isWindowTranslucencySupported() {
1900 return false;
1901 }
1902
1903 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1904 return false;
1905 }
1906
1907 /**
1908 * Returns true if swing backbuffer should be translucent.
1909 */
1910 public boolean isSwingBackbufferTranslucencySupported() {
1911 return false;
1912 }
1913
1914 /**
1915 * Returns whether or not a containing top level window for the passed
1916 * component is
1917 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1918 *
1919 * @param c a Component which toplevel's to check
1920 * @return {@code true} if the passed component is not null and has a
1921 * containing toplevel window which is opaque (so per-pixel translucency
1922 * is not enabled), {@code false} otherwise
1923 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1924 */
1925 public static boolean isContainingTopLevelOpaque(Component c) {
1926 Window w = getContainingWindow(c);
1927 return w != null && w.isOpaque();
1928 }
1929
1930 /**
1931 * Returns whether or not a containing top level window for the passed
1932 * component is
1933 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1934 *
1935 * @param c a Component which toplevel's to check
1936 * @return {@code true} if the passed component is not null and has a
1937 * containing toplevel window which has opacity less than
1938 * 1.0f (which means that it is translucent), {@code false} otherwise
1939 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1940 */
1941 public static boolean isContainingTopLevelTranslucent(Component c) {
1942 Window w = getContainingWindow(c);
1943 return w != null && w.getOpacity() < 1.0f;
1944 }
1945
1946 /**
1947 * Returns whether the native system requires using the peer.updateWindow()
1948 * method to update the contents of a non-opaque window, or if usual
1949 * painting procedures are sufficient. The default return value covers
1950 * the X11 systems. On MS Windows this method is overriden in WToolkit
1951 * to return true.
1952 */
1953 public boolean needUpdateWindow() {
1954 return false;
1955 }
1956
1957 /**
1958 * Descendants of the SunToolkit should override and put their own logic here.
1959 */
1960 public int getNumberOfButtons(){
1961 return 3;
1962 }
1963
1964 /**
1965 * Checks that the given object implements/extends the given
1966 * interface/class.
1967 *
1968 * Note that using the instanceof operator causes a class to be loaded.
1969 * Using this method doesn't load a class and it can be used instead of
1970 * the instanceof operator for performance reasons.
1971 *
1972 * @param obj Object to be checked
1973 * @param type The name of the interface/class. Must be
1974 * fully-qualified interface/class name.
1975 * @return true, if this object implements/extends the given
1976 * interface/class, false, otherwise, or if obj or type is null
1977 */
1978 public static boolean isInstanceOf(Object obj, String type) {
1979 if (obj == null) return false;
1980 if (type == null) return false;
1981
1982 return isInstanceOf(obj.getClass(), type);
1983 }
1984
1985 private static boolean isInstanceOf(Class<?> cls, String type) {
1986 if (cls == null) return false;
1987
1988 if (cls.getName().equals(type)) {
1989 return true;
1990 }
1991
1992 for (Class<?> c : cls.getInterfaces()) {
1993 if (c.getName().equals(type)) {
1994 return true;
1995 }
1996 }
1997 return isInstanceOf(cls.getSuperclass(), type);
1998 }
1999
2000 protected static LightweightFrame getLightweightFrame(Component c) {
2001 for (; c != null; c = c.getParent()) {
2002 if (c instanceof LightweightFrame) {
2003 return (LightweightFrame)c;
2004 }
2005 if (c instanceof Window) {
2006 // Don't traverse owner windows
2007 return null;
2008 }
2009 }
2010 return null;
2011 }
2012
2013 ///////////////////////////////////////////////////////////////////////////
2014 //
2015 // The following methods help set and identify whether a particular
2016 // AWTEvent object was produced by the system or by user code. As of this
2017 // writing the only consumer is the Java Plug-In, although this information
2018 // could be useful to more clients and probably should be formalized in
2019 // the public API.
2020 //
2021 ///////////////////////////////////////////////////////////////////////////
2022
2023 public static void setSystemGenerated(AWTEvent e) {
2024 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2025 }
2026
2027 public static boolean isSystemGenerated(AWTEvent e) {
2028 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2029 }
2030
2031 } // class SunToolkit
2032
2033
2034 /*
2035 * PostEventQueue is a Thread that runs in the same AppContext as the
2036 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2037 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2038 * events to this queue, which then calls EventQueue.postEvent().
2039 *
2040 * We do this because EventQueue.postEvent() may be overridden by client
2041 * code, and we mustn't ever call client code from the toolkit thread.
2042 */
2043 class PostEventQueue {
2044 private EventQueueItem queueHead = null;
2045 private EventQueueItem queueTail = null;
2046 private final EventQueue eventQueue;
2047
2048 private Thread flushThread = null;
2049
2050 PostEventQueue(EventQueue eq) {
2051 eventQueue = eq;
2052 }
2053
2054 /*
2055 * Continually post pending AWTEvents to the Java EventQueue. The method
2056 * is synchronized to ensure the flush is completed before a new event
2057 * can be posted to this queue.
2058 *
2059 * 7177040: The method couldn't be wholly synchronized because of calls
2060 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2061 * potentially lead to deadlock
2062 */
2063 public void flush() {
2064
2065 Thread newThread = Thread.currentThread();
2066
2067 try {
2068 EventQueueItem tempQueue;
2069 synchronized (this) {
2070 // Avoid method recursion
2071 if (newThread == flushThread) {
2072 return;
2073 }
2074 // Wait for other threads' flushing
2075 while (flushThread != null) {
2076 wait();
2077 }
2078 // Skip everything if queue is empty
2079 if (queueHead == null) {
2080 return;
2081 }
2082 // Remember flushing thread
2083 flushThread = newThread;
2084
2085 tempQueue = queueHead;
2086 queueHead = queueTail = null;
2087 }
2088 try {
2089 while (tempQueue != null) {
2090 eventQueue.postEvent(tempQueue.event);
2091 tempQueue = tempQueue.next;
2092 }
2093 }
2094 finally {
2095 // Only the flushing thread can get here
2096 synchronized (this) {
2097 // Forget flushing thread, inform other pending threads
2098 flushThread = null;
2099 notifyAll();
2100 }
2101 }
2102 }
2103 catch (InterruptedException e) {
2104 // Couldn't allow exception go up, so at least recover the flag
2105 newThread.interrupt();
2106 }
2107 }
2108
2109 /*
2110 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2111 */
2112 void postEvent(AWTEvent event) {
2113 EventQueueItem item = new EventQueueItem(event);
2114
2115 synchronized (this) {
2116 if (queueHead == null) {
2117 queueHead = queueTail = item;
2118 } else {
2119 queueTail.next = item;
2120 queueTail = item;
2121 }
2122 }
2123 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2124 }
2125 } // class PostEventQueue