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