1 /*
2 * Copyright (c) 1997, 2014, 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 static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.io.File;
40 import java.io.IOException;
41 import java.io.InputStream;
42 import java.net.URL;
43 import java.security.PrivilegedAction;
44 import java.util.*;
45 import java.util.concurrent.TimeUnit;
46 import java.util.concurrent.locks.Condition;
47 import java.util.concurrent.locks.Lock;
48 import java.util.concurrent.locks.ReentrantLock;
49
50 import sun.awt.datatransfer.DataTransferer;
51 import sun.util.logging.PlatformLogger;
52 import sun.misc.SoftCache;
53 import sun.font.FontDesignMetrics;
54 import sun.awt.im.InputContext;
55 import sun.awt.image.*;
56 import sun.security.action.GetPropertyAction;
57 import sun.security.action.GetBooleanAction;
58 import java.lang.reflect.InvocationTargetException;
59 import java.security.AccessController;
60
61 public abstract class SunToolkit extends Toolkit
62 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
63
64 // 8014718: logging has been removed from SunToolkit
65
66 /* Load debug settings for native code */
67 static {
68 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
69 DebugSettings.init();
70 }
71 };
72
73 /**
74 * Special mask for the UngrabEvent events, in addition to the
75 * public masks defined in AWTEvent. Should be used as the mask
76 * value for Toolkit.addAWTEventListener.
77 */
78 public static final int GRAB_EVENT_MASK = 0x80000000;
79
80 /* The key to put()/get() the PostEventQueue into/from the AppContext.
81 */
82 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
83
84 /**
85 * Number of buttons.
86 * By default it's taken from the system. If system value does not
87 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
88 */
89 protected static int numberOfButtons = 0;
90
91
92 /* XFree standard mention 24 buttons as maximum:
93 * http://www.xfree86.org/current/mouse.4.html
94 * We workaround systems supporting more than 24 buttons.
95 * Otherwise, we have to use long type values as masks
96 * which leads to API change.
97 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
98 * the 4-bytes limit for the int type. (CR 6799099)
99 * One more bit is reserved for FIRST_HIGH_BIT.
100 */
101 public final static int MAX_BUTTONS_SUPPORTED = 20;
102
103 /**
104 * Creates and initializes EventQueue instance for the specified
105 * AppContext.
106 * Note that event queue must be created from createNewAppContext()
107 * only in order to ensure that EventQueue constructor obtains
108 * the correct AppContext.
109 * @param appContext AppContext to associate with the event queue
110 */
111 private static void initEQ(AppContext appContext) {
112 EventQueue eventQueue;
113
114 String eqName = System.getProperty("AWT.EventQueueClass",
115 "java.awt.EventQueue");
116
117 try {
118 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
119 } catch (Exception e) {
120 e.printStackTrace();
121 System.err.println("Failed loading " + eqName + ": " + e);
122 eventQueue = new EventQueue();
123 }
124 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
125
126 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
127 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
128 }
129
130 public SunToolkit() {
131 }
132
133 public boolean useBufferPerWindow() {
134 return false;
135 }
136
137 public abstract WindowPeer createWindow(Window target)
138 throws HeadlessException;
139
140 public abstract FramePeer createFrame(Frame target)
141 throws HeadlessException;
142
143 public abstract FramePeer createLightweightFrame(LightweightFrame target)
144 throws HeadlessException;
145
146 public abstract DialogPeer createDialog(Dialog target)
147 throws HeadlessException;
148
149 public abstract ButtonPeer createButton(Button target)
150 throws HeadlessException;
151
152 public abstract TextFieldPeer createTextField(TextField target)
153 throws HeadlessException;
154
155 public abstract ChoicePeer createChoice(Choice target)
156 throws HeadlessException;
157
158 public abstract LabelPeer createLabel(Label target)
159 throws HeadlessException;
160
161 public abstract ListPeer createList(java.awt.List target)
162 throws HeadlessException;
163
164 public abstract CheckboxPeer createCheckbox(Checkbox target)
165 throws HeadlessException;
166
167 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
168 throws HeadlessException;
169
170 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
171 throws HeadlessException;
172
173 public abstract TextAreaPeer createTextArea(TextArea target)
174 throws HeadlessException;
175
176 public abstract FileDialogPeer createFileDialog(FileDialog target)
177 throws HeadlessException;
178
179 public abstract MenuBarPeer createMenuBar(MenuBar target)
180 throws HeadlessException;
181
182 public abstract MenuPeer createMenu(Menu target)
183 throws HeadlessException;
184
185 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
186 throws HeadlessException;
187
188 public abstract MenuItemPeer createMenuItem(MenuItem target)
189 throws HeadlessException;
190
191 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
192 CheckboxMenuItem target)
193 throws HeadlessException;
194
195 public abstract DragSourceContextPeer createDragSourceContextPeer(
196 DragGestureEvent dge)
197 throws InvalidDnDOperationException;
198
199 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
200 throws HeadlessException, AWTException;
201
202 public abstract SystemTrayPeer createSystemTray(SystemTray target);
203
204 public abstract boolean isTraySupported();
205
206 @SuppressWarnings("deprecation")
207 public abstract FontPeer getFontPeer(String name, int style);
208
209 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
210 throws AWTException;
211
212 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
213 throws HeadlessException;
214
215 /**
216 * The AWT lock is typically only used on Unix platforms to synchronize
217 * access to Xlib, OpenGL, etc. However, these methods are implemented
218 * in SunToolkit so that they can be called from shared code (e.g.
219 * from the OGL pipeline) or from the X11 pipeline regardless of whether
220 * XToolkit or MToolkit is currently in use. There are native macros
221 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
222 * methods is changed, make sure it is compatible with the native macros.
223 *
224 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
225 * used in place of:
226 * synchronized (getAWTLock()) {
227 * ...
228 * }
229 *
230 * By factoring these methods out specially, we are able to change the
231 * implementation of these methods (e.g. use more advanced locking
232 * mechanisms) without impacting calling code.
233 *
234 * Sample usage:
235 * private void doStuffWithXlib() {
236 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
237 * SunToolkit.awtLock();
238 * try {
239 * ...
240 * XlibWrapper.XDoStuff();
241 * } finally {
242 * SunToolkit.awtUnlock();
243 * }
244 * }
245 */
246
247 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
248 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
249
250 public static final void awtLock() {
251 AWT_LOCK.lock();
252 }
253
254 public static final boolean awtTryLock() {
255 return AWT_LOCK.tryLock();
256 }
257
258 public static final void awtUnlock() {
259 AWT_LOCK.unlock();
260 }
261
262 public static final void awtLockWait()
263 throws InterruptedException
264 {
265 AWT_LOCK_COND.await();
266 }
267
268 public static final void awtLockWait(long timeout)
269 throws InterruptedException
270 {
271 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
272 }
273
274 public static final void awtLockNotify() {
275 AWT_LOCK_COND.signal();
276 }
277
278 public static final void awtLockNotifyAll() {
279 AWT_LOCK_COND.signalAll();
280 }
281
282 public static final boolean isAWTLockHeldByCurrentThread() {
283 return AWT_LOCK.isHeldByCurrentThread();
284 }
285
286 /*
287 * Create a new AppContext, along with its EventQueue, for a
288 * new ThreadGroup. Browser code, for example, would use this
289 * method to create an AppContext & EventQueue for an Applet.
290 */
291 public static AppContext createNewAppContext() {
292 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
293 return createNewAppContext(threadGroup);
294 }
295
296 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
297 // Create appContext before initialization of EventQueue, so all
298 // the calls to AppContext.getAppContext() from EventQueue ctor
299 // return correct values
300 AppContext appContext = new AppContext(threadGroup);
301 initEQ(appContext);
302
303 return appContext;
304 }
305
306 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
307 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
308 }
309
310 /*
311 * Fetch the peer associated with the given target (as specified
312 * in the peer creation method). This can be used to determine
313 * things like what the parent peer is. If the target is null
314 * or the target can't be found (either because the a peer was
315 * never created for it or the peer was disposed), a null will
316 * be returned.
317 */
318 protected static Object targetToPeer(Object target) {
319 if (target != null && !GraphicsEnvironment.isHeadless()) {
320 return AWTAutoShutdown.getInstance().getPeer(target);
321 }
322 return null;
323 }
324
325 protected static void targetCreatedPeer(Object target, Object peer) {
326 if (target != null && peer != null &&
327 !GraphicsEnvironment.isHeadless())
328 {
329 AWTAutoShutdown.getInstance().registerPeer(target, peer);
330 }
331 }
332
333 protected static void targetDisposedPeer(Object target, Object peer) {
334 if (target != null && peer != null &&
335 !GraphicsEnvironment.isHeadless())
336 {
337 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
338 }
339 }
340
341 // Maps from non-Component/MenuComponent to AppContext.
342 // WeakHashMap<Component,AppContext>
343 private static final Map<Object, AppContext> appContextMap =
344 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
345
346 /**
347 * Sets the appContext field of target. If target is not a Component or
348 * MenuComponent, this returns false.
349 */
350 private static boolean setAppContext(Object target,
351 AppContext context) {
352 if (target instanceof Component) {
353 AWTAccessor.getComponentAccessor().
354 setAppContext((Component)target, context);
355 } else if (target instanceof MenuComponent) {
356 AWTAccessor.getMenuComponentAccessor().
357 setAppContext((MenuComponent)target, context);
358 } else {
359 return false;
360 }
361 return true;
362 }
363
364 /**
365 * Returns the appContext field for target. If target is not a
366 * Component or MenuComponent this returns null.
367 */
368 private static AppContext getAppContext(Object target) {
369 if (target instanceof Component) {
370 return AWTAccessor.getComponentAccessor().
371 getAppContext((Component)target);
372 } else if (target instanceof MenuComponent) {
373 return AWTAccessor.getMenuComponentAccessor().
374 getAppContext((MenuComponent)target);
375 } else {
376 return null;
377 }
378 }
379
380 /*
381 * Fetch the AppContext associated with the given target.
382 * This can be used to determine things like which EventQueue
383 * to use for posting events to a Component. If the target is
384 * null or the target can't be found, a null with be returned.
385 */
386 public static AppContext targetToAppContext(Object target) {
387 if (target == null) {
388 return null;
389 }
390 AppContext context = getAppContext(target);
391 if (context == null) {
392 // target is not a Component/MenuComponent, try the
393 // appContextMap.
394 context = appContextMap.get(target);
395 }
396 return context;
397 }
398
399 /**
400 * Sets the synchronous status of focus requests on lightweight
401 * components in the specified window to the specified value.
402 * If the boolean parameter is <code>true</code> then the focus
403 * requests on lightweight components will be performed
404 * synchronously, if it is <code>false</code>, then asynchronously.
405 * By default, all windows have their lightweight request status
406 * set to asynchronous.
407 * <p>
408 * The application can only set the status of lightweight focus
409 * requests to synchronous for any of its windows if it doesn't
410 * perform focus transfers between different heavyweight containers.
411 * In this case the observable focus behaviour is the same as with
412 * asynchronous status.
413 * <p>
414 * If the application performs focus transfer between different
415 * heavyweight containers and sets the lightweight focus request
416 * status to synchronous for any of its windows, then further focus
417 * behaviour is unspecified.
418 * <p>
419 * @param w window for which the lightweight focus request status
420 * should be set
421 * @param status the value of lightweight focus request status
422 */
423
424 public static void setLWRequestStatus(Window changed,boolean status){
425 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
426 };
427
428 public static void checkAndSetPolicy(Container cont) {
429 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
430 getCurrentKeyboardFocusManager().
431 getDefaultFocusTraversalPolicy();
432
433 cont.setFocusTraversalPolicy(defaultPolicy);
434 }
435
436 private static FocusTraversalPolicy createLayoutPolicy() {
437 FocusTraversalPolicy policy = null;
438 try {
439 Class<?> layoutPolicyClass =
440 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
441 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
442 }
443 catch (ClassNotFoundException e) {
444 assert false;
445 }
446 catch (InstantiationException e) {
447 assert false;
448 }
449 catch (IllegalAccessException e) {
450 assert false;
451 }
452
453 return policy;
454 }
455
456 /*
457 * Insert a mapping from target to AppContext, for later retrieval
458 * via targetToAppContext() above.
459 */
460 public static void insertTargetMapping(Object target, AppContext appContext) {
461 if (!setAppContext(target, appContext)) {
462 // Target is not a Component/MenuComponent, use the private Map
463 // instead.
464 appContextMap.put(target, appContext);
465 }
466 }
467
468 /*
469 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
470 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
471 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
472 * not be called under another lock since it locks the EventQueue.
473 * See bugids 4632918, 4526597.
474 */
475 public static void postEvent(AppContext appContext, AWTEvent event) {
476 if (event == null) {
477 throw new NullPointerException();
478 }
479
480 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
481 if (sea != null && sea.isSequencedEvent(event)) {
482 AWTEvent nested = sea.getNested(event);
483 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
484 nested instanceof TimedWindowEvent)
485 {
486 TimedWindowEvent twe = (TimedWindowEvent)nested;
487 ((SunToolkit)Toolkit.getDefaultToolkit()).
488 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
489 }
490 }
491
492 // All events posted via this method are system-generated.
493 // Placing the following call here reduces considerably the
494 // number of places throughout the toolkit that would
495 // otherwise have to be modified to precisely identify
496 // system-generated events.
497 setSystemGenerated(event);
498 AppContext eventContext = targetToAppContext(event.getSource());
499 if (eventContext != null && !eventContext.equals(appContext)) {
500 throw new RuntimeException("Event posted on wrong app context : " + event);
501 }
502 PostEventQueue postEventQueue =
503 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
504 if (postEventQueue != null) {
505 postEventQueue.postEvent(event);
506 }
507 }
508
509 /*
510 * Post AWTEvent of high priority.
511 */
512 public static void postPriorityEvent(final AWTEvent e) {
513 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
514 public void run() {
515 AWTAccessor.getAWTEventAccessor().setPosted(e);
516 ((Component)e.getSource()).dispatchEvent(e);
517 }
518 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
519 postEvent(targetToAppContext(e.getSource()), pe);
520 }
521
522 /*
523 * Flush any pending events which haven't been posted to the AWT
524 * EventQueue yet.
525 */
526 public static void flushPendingEvents() {
527 AppContext appContext = AppContext.getAppContext();
528 flushPendingEvents(appContext);
529 }
530
531 /*
532 * Flush the PostEventQueue for the right AppContext.
533 * The default flushPendingEvents only flushes the thread-local context,
534 * which is not always correct, c.f. 3746956
535 */
536 public static void flushPendingEvents(AppContext appContext) {
537 PostEventQueue postEventQueue =
538 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
539 if (postEventQueue != null) {
540 postEventQueue.flush();
541 }
542 }
543
544 /*
545 * Execute a chunk of code on the Java event handler thread for the
546 * given target. Does not wait for the execution to occur before
547 * returning to the caller.
548 */
549 public static void executeOnEventHandlerThread(Object target,
550 Runnable runnable) {
551 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
552 }
553
554 /*
555 * Fixed 5064013: the InvocationEvent time should be equals
556 * the time of the ActionEvent
557 */
558 @SuppressWarnings("serial")
559 public static void executeOnEventHandlerThread(Object target,
560 Runnable runnable,
561 final long when) {
562 executeOnEventHandlerThread(
563 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
564 public long getWhen() {
565 return when;
566 }
567 });
568 }
569
570 /*
571 * Execute a chunk of code on the Java event handler thread for the
572 * given target. Does not wait for the execution to occur before
573 * returning to the caller.
574 */
575 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
576 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
577 }
578
579 /*
580 * Execute a chunk of code on the Java event handler thread. The
581 * method takes into account provided AppContext and sets
582 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
583 * event. See 6451487 for detailes.
584 * Does not wait for the execution to occur before returning to
585 * the caller.
586 */
587 public static void invokeLaterOnAppContext(
588 AppContext appContext, Runnable dispatcher)
589 {
590 postEvent(appContext,
591 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
592 PeerEvent.PRIORITY_EVENT));
593 }
594
595 /*
596 * Execute a chunk of code on the Java event handler thread for the
597 * given target. Waits for the execution to occur before returning
598 * to the caller.
599 */
600 public static void executeOnEDTAndWait(Object target, Runnable runnable)
601 throws InterruptedException, InvocationTargetException
602 {
603 if (EventQueue.isDispatchThread()) {
604 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
605 }
606
607 class AWTInvocationLock {}
608 Object lock = new AWTInvocationLock();
609
610 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
611
612 synchronized (lock) {
613 executeOnEventHandlerThread(event);
614 while(!event.isDispatched()) {
615 lock.wait();
616 }
617 }
618
619 Throwable eventThrowable = event.getThrowable();
620 if (eventThrowable != null) {
621 throw new InvocationTargetException(eventThrowable);
622 }
623 }
624
625 /*
626 * Returns true if the calling thread is the event dispatch thread
627 * contained within AppContext which associated with the given target.
628 * Use this call to ensure that a given task is being executed
629 * (or not being) on the event dispatch thread for the given target.
630 */
631 public static boolean isDispatchThreadForAppContext(Object target) {
632 AppContext appContext = targetToAppContext(target);
633 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
634
635 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
636 return accessor.isDispatchThreadImpl(eq);
637 }
638
639 public Dimension getScreenSize() {
640 return new Dimension(getScreenWidth(), getScreenHeight());
641 }
642 protected abstract int getScreenWidth();
643 protected abstract int getScreenHeight();
644
645 @SuppressWarnings("deprecation")
646 public FontMetrics getFontMetrics(Font font) {
647 return FontDesignMetrics.getMetrics(font);
648 }
649
650 @SuppressWarnings("deprecation")
651 public String[] getFontList() {
652 String[] hardwiredFontList = {
653 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
654 Font.DIALOG_INPUT
655
656 // -- Obsolete font names from 1.0.2. It was decided that
657 // -- getFontList should not return these old names:
658 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
659 };
660 return hardwiredFontList;
661 }
662
663 public PanelPeer createPanel(Panel target) {
664 return (PanelPeer)createComponent(target);
665 }
666
667 public CanvasPeer createCanvas(Canvas target) {
668 return (CanvasPeer)createComponent(target);
669 }
670
671 /**
672 * Disables erasing of background on the canvas before painting if
673 * this is supported by the current toolkit. It is recommended to
674 * call this method early, before the Canvas becomes displayable,
675 * because some Toolkit implementations do not support changing
676 * this property once the Canvas becomes displayable.
677 */
678 public void disableBackgroundErase(Canvas canvas) {
679 disableBackgroundEraseImpl(canvas);
680 }
681
682 /**
683 * Disables the native erasing of the background on the given
684 * component before painting if this is supported by the current
685 * toolkit. This only has an effect for certain components such as
686 * Canvas, Panel and Window. It is recommended to call this method
687 * early, before the Component becomes displayable, because some
688 * Toolkit implementations do not support changing this property
689 * once the Component becomes displayable.
690 */
691 public void disableBackgroundErase(Component component) {
692 disableBackgroundEraseImpl(component);
693 }
694
695 private void disableBackgroundEraseImpl(Component component) {
696 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
697 }
698
699 /**
700 * Returns the value of "sun.awt.noerasebackground" property. Default
701 * value is {@code false}.
702 */
703 public static boolean getSunAwtNoerasebackground() {
704 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
705 }
706
707 /**
708 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
709 * value is {@code false}.
710 */
711 public static boolean getSunAwtErasebackgroundonresize() {
712 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
713 }
714
715
716 static final SoftCache imgCache = new SoftCache();
717
718 static Image getImageFromHash(Toolkit tk, URL url) {
719 checkPermissions(url);
720 synchronized (imgCache) {
721 Image img = (Image)imgCache.get(url);
722 if (img == null) {
723 try {
724 img = tk.createImage(new URLImageSource(url));
725 imgCache.put(url, img);
726 } catch (Exception e) {
727 }
728 }
729 return img;
730 }
731 }
732
733 static Image getImageFromHash(Toolkit tk,
734 String filename) {
735 checkPermissions(filename);
736 synchronized (imgCache) {
737 Image img = (Image)imgCache.get(filename);
738 if (img == null) {
739 try {
740 img = tk.createImage(new FileImageSource(filename));
741 imgCache.put(filename, img);
742 } catch (Exception e) {
743 }
744 }
745 return img;
746 }
747 }
748
749 public Image getImage(String filename) {
750 return getImageFromHash(this, filename);
751 }
752
753 public Image getImage(URL url) {
754 return getImageFromHash(this, url);
755 }
756
757 protected Image getImageWithResolutionVariant(String fileName,
758 String resolutionVariantName) {
759 synchronized (imgCache) {
760 Image image = getImageFromHash(this, fileName);
761 if (image instanceof MultiResolutionImage) {
762 return image;
763 }
764 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
765 image = createImageWithResolutionVariant(image, resolutionVariant);
766 imgCache.put(fileName, image);
767 return image;
768 }
769 }
770
771 protected Image getImageWithResolutionVariant(URL url,
772 URL resolutionVariantURL) {
773 synchronized (imgCache) {
774 Image image = getImageFromHash(this, url);
775 if (image instanceof MultiResolutionImage) {
776 return image;
777 }
778 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
779 image = createImageWithResolutionVariant(image, resolutionVariant);
780 imgCache.put(url, image);
781 return image;
782 }
783 }
784
785
786 public Image createImage(String filename) {
787 checkPermissions(filename);
788 return createImage(new FileImageSource(filename));
789 }
790
791 public Image createImage(URL url) {
792 checkPermissions(url);
793 return createImage(new URLImageSource(url));
794 }
795
796 public Image createImage(byte[] data, int offset, int length) {
797 return createImage(new ByteArrayImageSource(data, offset, length));
798 }
799
800 public Image createImage(ImageProducer producer) {
801 return new ToolkitImage(producer);
802 }
803
804 public static Image createImageWithResolutionVariant(Image image,
805 Image resolutionVariant) {
806 return new MultiResolutionToolkitImage(image, resolutionVariant);
807 }
808
809 public int checkImage(Image img, int w, int h, ImageObserver o) {
810 if (!(img instanceof ToolkitImage)) {
811 return ImageObserver.ALLBITS;
812 }
813
814 ToolkitImage tkimg = (ToolkitImage)img;
815 int repbits;
816 if (w == 0 || h == 0) {
817 repbits = ImageObserver.ALLBITS;
818 } else {
819 repbits = tkimg.getImageRep().check(o);
820 }
821 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
822 }
823
824 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
825 if (w == 0 || h == 0) {
826 return true;
827 }
828
829 // Must be a ToolkitImage
830 if (!(img instanceof ToolkitImage)) {
831 return true;
832 }
833
834 ToolkitImage tkimg = (ToolkitImage)img;
835 if (tkimg.hasError()) {
836 if (o != null) {
837 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
838 -1, -1, -1, -1);
839 }
840 return false;
841 }
842 ImageRepresentation ir = tkimg.getImageRep();
843 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
844 }
845
846 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
847 ToolkitImage rvImage = getResolutionVariant(img);
848 int rvw = getRVSize(w);
849 int rvh = getRVSize(h);
850 // Ignore the resolution variant in case of error
851 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
852 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
853 getResolutionVariantObserver(
854 img, o, w, h, rvw, rvh, true));
855 }
856
857 private boolean prepareResolutionVariant(Image img, int w, int h,
858 ImageObserver o) {
859
860 ToolkitImage rvImage = getResolutionVariant(img);
861 int rvw = getRVSize(w);
862 int rvh = getRVSize(h);
863 // Ignore the resolution variant in case of error
864 return rvImage == null || rvImage.hasError() || prepareImage(
865 rvImage, rvw, rvh,
866 MultiResolutionToolkitImage.getResolutionVariantObserver(
867 img, o, w, h, rvw, rvh, true));
868 }
869
870 private static int getRVSize(int size){
871 return size == -1 ? -1 : 2 * size;
872 }
873
874 private static ToolkitImage getResolutionVariant(Image image) {
875 if (image instanceof MultiResolutionToolkitImage) {
876 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
877 getResolutionVariant();
878 if (resolutionVariant instanceof ToolkitImage) {
879 return (ToolkitImage) resolutionVariant;
880 }
881 }
882 return null;
883 }
884
885 protected static boolean imageCached(Object key) {
886 return imgCache.containsKey(key);
887 }
888
889 protected static boolean imageExists(String filename) {
890 checkPermissions(filename);
891 return filename != null && new File(filename).exists();
892 }
893
894 @SuppressWarnings("try")
895 protected static boolean imageExists(URL url) {
896 checkPermissions(url);
897 if (url != null) {
898 try (InputStream is = url.openStream()) {
899 return true;
900 }catch(IOException e){
901 return false;
902 }
903 }
904 return false;
905 }
906
907 private static void checkPermissions(String filename) {
908 SecurityManager security = System.getSecurityManager();
909 if (security != null) {
910 security.checkRead(filename);
911 }
912 }
913
914 private static void checkPermissions(URL url) {
915 SecurityManager sm = System.getSecurityManager();
916 if (sm != null) {
917 try {
918 java.security.Permission perm =
919 url.openConnection().getPermission();
920 if (perm != null) {
921 try {
922 sm.checkPermission(perm);
923 } catch (SecurityException se) {
924 // fallback to checkRead/checkConnect for pre 1.2
925 // security managers
926 if ((perm instanceof java.io.FilePermission) &&
927 perm.getActions().indexOf("read") != -1) {
928 sm.checkRead(perm.getName());
929 } else if ((perm instanceof
930 java.net.SocketPermission) &&
931 perm.getActions().indexOf("connect") != -1) {
932 sm.checkConnect(url.getHost(), url.getPort());
933 } else {
934 throw se;
935 }
936 }
937 }
938 } catch (java.io.IOException ioe) {
939 sm.checkConnect(url.getHost(), url.getPort());
940 }
941 }
942 }
943
944 /**
945 * Scans {@code imageList} for best-looking image of specified dimensions.
946 * Image can be scaled and/or padded with transparency.
947 */
948 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
949 if (width == 0 || height == 0) {
950 return null;
951 }
952 Image bestImage = null;
953 int bestWidth = 0;
954 int bestHeight = 0;
955 double bestSimilarity = 3; //Impossibly high value
956 double bestScaleFactor = 0;
957 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
958 //Iterate imageList looking for best matching image.
959 //'Similarity' measure is defined as good scale factor and small insets.
960 //best possible similarity is 0 (no scale, no insets).
961 //It's found while the experiments that good-looking result is achieved
962 //with scale factors x1, x3/4, x2/3, xN, x1/N.
963 Image im = i.next();
964 if (im == null) {
965 continue;
966 }
967 if (im instanceof ToolkitImage) {
968 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
969 ir.reconstruct(ImageObserver.ALLBITS);
970 }
971 int iw;
972 int ih;
973 try {
974 iw = im.getWidth(null);
975 ih = im.getHeight(null);
976 } catch (Exception e){
977 continue;
978 }
979 if (iw > 0 && ih > 0) {
980 //Calc scale factor
981 double scaleFactor = Math.min((double)width / (double)iw,
982 (double)height / (double)ih);
983 //Calculate scaled image dimensions
984 //adjusting scale factor to nearest "good" value
985 int adjw = 0;
986 int adjh = 0;
987 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
988 if (scaleFactor >= 2) {
989 //Need to enlarge image more than twice
990 //Round down scale factor to multiply by integer value
991 scaleFactor = Math.floor(scaleFactor);
992 adjw = iw * (int)scaleFactor;
993 adjh = ih * (int)scaleFactor;
994 scaleMeasure = 1.0 - 0.5 / scaleFactor;
995 } else if (scaleFactor >= 1) {
996 //Don't scale
997 scaleFactor = 1.0;
998 adjw = iw;
999 adjh = ih;
1000 scaleMeasure = 0;
1001 } else if (scaleFactor >= 0.75) {
1002 //Multiply by 3/4
1003 scaleFactor = 0.75;
1004 adjw = iw * 3 / 4;
1005 adjh = ih * 3 / 4;
1006 scaleMeasure = 0.3;
1007 } else if (scaleFactor >= 0.6666) {
1008 //Multiply by 2/3
1009 scaleFactor = 0.6666;
1010 adjw = iw * 2 / 3;
1011 adjh = ih * 2 / 3;
1012 scaleMeasure = 0.33;
1013 } else {
1014 //Multiply size by 1/scaleDivider
1015 //where scaleDivider is minimum possible integer
1016 //larger than 1/scaleFactor
1017 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1018 scaleFactor = 1.0 / scaleDivider;
1019 adjw = (int)Math.round((double)iw / scaleDivider);
1020 adjh = (int)Math.round((double)ih / scaleDivider);
1021 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1022 }
1023 double similarity = ((double)width - (double)adjw) / (double)width +
1024 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1025 scaleMeasure; //Large rescale is bad
1026 if (similarity < bestSimilarity) {
1027 bestSimilarity = similarity;
1028 bestScaleFactor = scaleFactor;
1029 bestImage = im;
1030 bestWidth = adjw;
1031 bestHeight = adjh;
1032 }
1033 if (similarity == 0) break;
1034 }
1035 }
1036 if (bestImage == null) {
1037 //No images were found, possibly all are broken
1038 return null;
1039 }
1040 BufferedImage bimage =
1041 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1042 Graphics2D g = bimage.createGraphics();
1043 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1044 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1045 try {
1046 int x = (width - bestWidth) / 2;
1047 int y = (height - bestHeight) / 2;
1048 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1049 } finally {
1050 g.dispose();
1051 }
1052 return bimage;
1053 }
1054
1055 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1056 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1057 if (bimage == null) {
1058 return null;
1059 }
1060 Raster raster = bimage.getRaster();
1061 DataBuffer buffer = raster.getDataBuffer();
1062 return (DataBufferInt)buffer;
1063 }
1064
1065 protected EventQueue getSystemEventQueueImpl() {
1066 return getSystemEventQueueImplPP();
1067 }
1068
1069 // Package private implementation
1070 static EventQueue getSystemEventQueueImplPP() {
1071 return getSystemEventQueueImplPP(AppContext.getAppContext());
1072 }
1073
1074 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1075 EventQueue theEventQueue =
1076 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1077 return theEventQueue;
1078 }
1079
1080 /**
1081 * Give native peers the ability to query the native container
1082 * given a native component (eg the direct parent may be lightweight).
1083 */
1084 public static Container getNativeContainer(Component c) {
1085 return Toolkit.getNativeContainer(c);
1086 }
1087
1088 /**
1089 * Gives native peers the ability to query the closest HW component.
1090 * If the given component is heavyweight, then it returns this. Otherwise,
1091 * it goes one level up in the hierarchy and tests next component.
1092 */
1093 public static Component getHeavyweightComponent(Component c) {
1094 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1095 c = AWTAccessor.getComponentAccessor().getParent(c);
1096 }
1097 return c;
1098 }
1099
1100 /**
1101 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1102 */
1103 public int getFocusAcceleratorKeyMask() {
1104 return InputEvent.ALT_MASK;
1105 }
1106
1107 /**
1108 * Tests whether specified key modifiers mask can be used to enter a printable
1109 * character. This is a default implementation of this method, which reflects
1110 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1111 * characters from the extended character set (like euro sign or math symbols)
1112 */
1113 public boolean isPrintableCharacterModifiersMask(int mods) {
1114 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1115 }
1116
1117 /**
1118 * Returns whether popup is allowed to be shown above the task bar.
1119 * This is a default implementation of this method, which checks
1120 * corresponding security permission.
1121 */
1122 public boolean canPopupOverlapTaskBar() {
1123 boolean result = true;
1124 try {
1125 SecurityManager sm = System.getSecurityManager();
1126 if (sm != null) {
1127 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1128 }
1129 } catch (SecurityException se) {
1130 // There is no permission to show popups over the task bar
1131 result = false;
1132 }
1133 return result;
1134 }
1135
1136 /**
1137 * Returns a new input method window, with behavior as specified in
1138 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1139 * If the inputContext is not null, the window should return it from its
1140 * getInputContext() method. The window needs to implement
1141 * sun.awt.im.InputMethodWindow.
1142 * <p>
1143 * SunToolkit subclasses can override this method to return better input
1144 * method windows.
1145 */
1146 public Window createInputMethodWindow(String title, InputContext context) {
1147 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1148 }
1149
1150 /**
1151 * Returns whether enableInputMethods should be set to true for peered
1152 * TextComponent instances on this platform. False by default.
1153 */
1154 public boolean enableInputMethodsForTextComponent() {
1155 return false;
1156 }
1157
1158 private static Locale startupLocale = null;
1159
1160 /**
1161 * Returns the locale in which the runtime was started.
1162 */
1163 public static Locale getStartupLocale() {
1164 if (startupLocale == null) {
1165 String language, region, country, variant;
1166 language = AccessController.doPrivileged(
1167 new GetPropertyAction("user.language", "en"));
1168 // for compatibility, check for old user.region property
1169 region = AccessController.doPrivileged(
1170 new GetPropertyAction("user.region"));
1171 if (region != null) {
1172 // region can be of form country, country_variant, or _variant
1173 int i = region.indexOf('_');
1174 if (i >= 0) {
1175 country = region.substring(0, i);
1176 variant = region.substring(i + 1);
1177 } else {
1178 country = region;
1179 variant = "";
1180 }
1181 } else {
1182 country = AccessController.doPrivileged(
1183 new GetPropertyAction("user.country", ""));
1184 variant = AccessController.doPrivileged(
1185 new GetPropertyAction("user.variant", ""));
1186 }
1187 startupLocale = new Locale(language, country, variant);
1188 }
1189 return startupLocale;
1190 }
1191
1192 /**
1193 * Returns the default keyboard locale of the underlying operating system
1194 */
1195 public Locale getDefaultKeyboardLocale() {
1196 return getStartupLocale();
1197 }
1198
1199 private static DefaultMouseInfoPeer mPeer = null;
1200
1201 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1202 if (mPeer == null) {
1203 mPeer = new DefaultMouseInfoPeer();
1204 }
1205 return mPeer;
1206 }
1207
1208
1209 /**
1210 * Returns whether default toolkit needs the support of the xembed
1211 * from embedding host(if any).
1212 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1213 */
1214 public static boolean needsXEmbed() {
1215 String noxembed = AccessController.
1216 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1217 if ("true".equals(noxembed)) {
1218 return false;
1219 }
1220
1221 Toolkit tk = Toolkit.getDefaultToolkit();
1222 if (tk instanceof SunToolkit) {
1223 // SunToolkit descendants should override this method to specify
1224 // concrete behavior
1225 return ((SunToolkit)tk).needsXEmbedImpl();
1226 } else {
1227 // Non-SunToolkit doubtly might support XEmbed
1228 return false;
1229 }
1230 }
1231
1232 /**
1233 * Returns whether this toolkit needs the support of the xembed
1234 * from embedding host(if any).
1235 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1236 */
1237 protected boolean needsXEmbedImpl() {
1238 return false;
1239 }
1240
1241 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1242
1243 /**
1244 * Returns whether the XEmbed server feature is requested by
1245 * developer. If true, Toolkit should return an
1246 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1247 */
1248 protected final boolean isXEmbedServerRequested() {
1249 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1250 }
1251
1252 /**
1253 * Returns whether the modal exclusion API is supported by the current toolkit.
1254 * When it isn't supported, calling <code>setModalExcluded</code> has no
1255 * effect, and <code>isModalExcluded</code> returns false for all windows.
1256 *
1257 * @return true if modal exclusion is supported by the toolkit, false otherwise
1258 *
1259 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1260 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1261 *
1262 * @since 1.5
1263 */
1264 public static boolean isModalExcludedSupported()
1265 {
1266 Toolkit tk = Toolkit.getDefaultToolkit();
1267 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1268 }
1269 /*
1270 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1271 *
1272 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1273 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1274 *
1275 * @since 1.5
1276 */
1277 protected boolean isModalExcludedSupportedImpl()
1278 {
1279 return false;
1280 }
1281
1282 /*
1283 * Sets this window to be excluded from being modally blocked. When the
1284 * toolkit supports modal exclusion and this method is called, input
1285 * events, focus transfer and z-order will continue to work for the
1286 * window, it's owned windows and child components, even in the
1287 * presence of a modal dialog.
1288 * For details on which <code>Window</code>s are normally blocked
1289 * by modal dialog, see {@link java.awt.Dialog}.
1290 * Invoking this method when the modal exclusion API is not supported by
1291 * the current toolkit has no effect.
1292 * @param window Window to be marked as not modally blocked
1293 * @see java.awt.Dialog
1294 * @see java.awt.Dialog#setModal(boolean)
1295 * @see sun.awt.SunToolkit#isModalExcludedSupported
1296 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1297 */
1298 public static void setModalExcluded(Window window)
1299 {
1300 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1301 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1302 }
1303 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1304 }
1305
1306 /*
1307 * Returns whether the specified window is blocked by modal dialogs.
1308 * If the modal exclusion API isn't supported by the current toolkit,
1309 * it returns false for all windows.
1310 *
1311 * @param window Window to test for modal exclusion
1312 *
1313 * @return true if the window is modal excluded, false otherwise. If
1314 * the modal exclusion isn't supported by the current Toolkit, false
1315 * is returned
1316 *
1317 * @see sun.awt.SunToolkit#isModalExcludedSupported
1318 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1319 *
1320 * @since 1.5
1321 */
1322 public static boolean isModalExcluded(Window window)
1323 {
1324 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1325 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1326 }
1327 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1328 }
1329
1330 /**
1331 * Overridden in XToolkit and WToolkit
1332 */
1333 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1334 return (modalityType == Dialog.ModalityType.MODELESS) ||
1335 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1336 }
1337
1338 /**
1339 * Overridden in XToolkit and WToolkit
1340 */
1341 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1342 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1343 }
1344
1345 ///////////////////////////////////////////////////////////////////////////
1346 //
1347 // The following is used by the Java Plug-in to coordinate dialog modality
1348 // between containing applications (browsers, ActiveX containers etc) and
1349 // the AWT.
1350 //
1351 ///////////////////////////////////////////////////////////////////////////
1352
1353 private ModalityListenerList modalityListeners = new ModalityListenerList();
1354
1355 public void addModalityListener(ModalityListener listener) {
1356 modalityListeners.add(listener);
1357 }
1358
1359 public void removeModalityListener(ModalityListener listener) {
1360 modalityListeners.remove(listener);
1361 }
1362
1363 public void notifyModalityPushed(Dialog dialog) {
1364 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1365 }
1366
1367 public void notifyModalityPopped(Dialog dialog) {
1368 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1369 }
1370
1371 final void notifyModalityChange(int id, Dialog source) {
1372 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1373 ev.dispatch();
1374 }
1375
1376 static class ModalityListenerList implements ModalityListener {
1377
1378 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1379
1380 void add(ModalityListener listener) {
1381 listeners.addElement(listener);
1382 }
1383
1384 void remove(ModalityListener listener) {
1385 listeners.removeElement(listener);
1386 }
1387
1388 public void modalityPushed(ModalityEvent ev) {
1389 Iterator<ModalityListener> it = listeners.iterator();
1390 while (it.hasNext()) {
1391 it.next().modalityPushed(ev);
1392 }
1393 }
1394
1395 public void modalityPopped(ModalityEvent ev) {
1396 Iterator<ModalityListener> it = listeners.iterator();
1397 while (it.hasNext()) {
1398 it.next().modalityPopped(ev);
1399 }
1400 }
1401 } // end of class ModalityListenerList
1402
1403 ///////////////////////////////////////////////////////////////////////////
1404 // End Plug-in code
1405 ///////////////////////////////////////////////////////////////////////////
1406
1407 public static boolean isLightweightOrUnknown(Component comp) {
1408 if (comp.isLightweight()
1409 || !(getDefaultToolkit() instanceof SunToolkit))
1410 {
1411 return true;
1412 }
1413 return !(comp instanceof Button
1414 || comp instanceof Canvas
1415 || comp instanceof Checkbox
1416 || comp instanceof Choice
1417 || comp instanceof Label
1418 || comp instanceof java.awt.List
1419 || comp instanceof Panel
1420 || comp instanceof Scrollbar
1421 || comp instanceof ScrollPane
1422 || comp instanceof TextArea
1423 || comp instanceof TextField
1424 || comp instanceof Window);
1425 }
1426
1427 @SuppressWarnings("serial")
1428 public static class OperationTimedOut extends RuntimeException {
1429 public OperationTimedOut(String msg) {
1430 super(msg);
1431 }
1432 public OperationTimedOut() {
1433 }
1434 }
1435
1436 @SuppressWarnings("serial")
1437 public static class InfiniteLoop extends RuntimeException {
1438 }
1439
1440 @SuppressWarnings("serial")
1441 public static class IllegalThreadException extends RuntimeException {
1442 public IllegalThreadException(String msg) {
1443 super(msg);
1444 }
1445 public IllegalThreadException() {
1446 }
1447 }
1448
1449 public static final int DEFAULT_WAIT_TIME = 10000;
1450 private static final int MAX_ITERS = 20;
1451 private static final int MIN_ITERS = 0;
1452 private static final int MINIMAL_EDELAY = 0;
1453
1454 /**
1455 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1456 */
1457 public void realSync() throws OperationTimedOut, InfiniteLoop {
1458 realSync(DEFAULT_WAIT_TIME);
1459 }
1460
1461 /**
1462 * Forces toolkit to synchronize with the native windowing
1463 * sub-system, flushing all pending work and waiting for all the
1464 * events to be processed. This method guarantees that after
1465 * return no additional Java events will be generated, unless
1466 * cause by user. Obviously, the method cannot be used on the
1467 * event dispatch thread (EDT). In case it nevertheless gets
1468 * invoked on this thread, the method throws the
1469 * IllegalThreadException runtime exception.
1470 *
1471 * <p> This method allows to write tests without explicit timeouts
1472 * or wait for some event. Example:
1473 * <code>
1474 * Frame f = ...;
1475 * f.setVisible(true);
1476 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1477 * </code>
1478 *
1479 * <p> After realSync, <code>f</code> will be completely visible
1480 * on the screen, its getLocationOnScreen will be returning the
1481 * right result and it will be the focus owner.
1482 *
1483 * <p> Another example:
1484 * <code>
1485 * b.requestFocus();
1486 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1487 * </code>
1488 *
1489 * <p> After realSync, <code>b</code> will be focus owner.
1490 *
1491 * <p> Notice that realSync isn't guaranteed to work if recurring
1492 * actions occur, such as if during processing of some event
1493 * another request which may generate some events occurs. By
1494 * default, sync tries to perform as much as {@value MAX_ITERS}
1495 * cycles of event processing, allowing for roughly {@value
1496 * MAX_ITERS} additional requests.
1497 *
1498 * <p> For example, requestFocus() generates native request, which
1499 * generates one or two Java focus events, which then generate a
1500 * serie of paint events, a serie of Java focus events, which then
1501 * generate a serie of paint events which then are processed -
1502 * three cycles, minimum.
1503 *
1504 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1505 */
1506 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1507 {
1508 if (EventQueue.isDispatchThread()) {
1509 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1510 }
1511 int bigLoop = 0;
1512 do {
1513 // Let's do sync first
1514 sync();
1515
1516 // During the wait process, when we were processing incoming
1517 // events, we could have made some new request, which can
1518 // generate new events. Example: MapNotify/XSetInputFocus.
1519 // Therefore, we dispatch them as long as there is something
1520 // to dispatch.
1521 int iters = 0;
1522 while (iters < MIN_ITERS) {
1523 syncNativeQueue(timeout);
1524 iters++;
1525 }
1526 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1527 iters++;
1528 }
1529 if (iters >= MAX_ITERS) {
1530 throw new InfiniteLoop();
1531 }
1532
1533 // native requests were dispatched by X/Window Manager or Windows
1534 // Moreover, we processed them all on Toolkit thread
1535 // Now wait while EDT processes them.
1536 //
1537 // During processing of some events (focus, for example),
1538 // some other events could have been generated. So, after
1539 // waitForIdle, we may end up with full EventQueue
1540 iters = 0;
1541 while (iters < MIN_ITERS) {
1542 waitForIdle(timeout);
1543 iters++;
1544 }
1545 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1546 iters++;
1547 }
1548 if (iters >= MAX_ITERS) {
1549 throw new InfiniteLoop();
1550 }
1551
1552 bigLoop++;
1553 // Again, for Java events, it was simple to check for new Java
1554 // events by checking event queue, but what if Java events
1555 // resulted in native requests? Therefor, check native events again.
1556 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1557 }
1558
1559 /**
1560 * Platform toolkits need to implement this method to perform the
1561 * sync of the native queue. The method should wait until native
1562 * requests are processed, all native events are processed and
1563 * corresponding Java events are generated. Should return
1564 * <code>true</code> if some events were processed,
1565 * <code>false</code> otherwise.
1566 */
1567 protected abstract boolean syncNativeQueue(final long timeout);
1568
1569 private boolean eventDispatched = false;
1570 private boolean queueEmpty = false;
1571 private final Object waitLock = "Wait Lock";
1572
1573 private boolean isEQEmpty() {
1574 EventQueue queue = getSystemEventQueueImpl();
1575 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1576 }
1577
1578 /**
1579 * Waits for the Java event queue to empty. Ensures that all
1580 * events are processed (including paint events), and that if
1581 * recursive events were generated, they are also processed.
1582 * Should return <code>true</code> if more processing is
1583 * necessary, <code>false</code> otherwise.
1584 */
1585 @SuppressWarnings("serial")
1586 protected final boolean waitForIdle(final long timeout) {
1587 flushPendingEvents();
1588 boolean queueWasEmpty = isEQEmpty();
1589 queueEmpty = false;
1590 eventDispatched = false;
1591 synchronized(waitLock) {
1592 postEvent(AppContext.getAppContext(),
1593 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1594 public void dispatch() {
1595 // Here we block EDT. It could have some
1596 // events, it should have dispatched them by
1597 // now. So native requests could have been
1598 // generated. First, dispatch them. Then,
1599 // flush Java events again.
1600 int iters = 0;
1601 while (iters < MIN_ITERS) {
1602 syncNativeQueue(timeout);
1603 iters++;
1604 }
1605 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1606 iters++;
1607 }
1608 flushPendingEvents();
1609
1610 synchronized(waitLock) {
1611 queueEmpty = isEQEmpty();
1612 eventDispatched = true;
1613 waitLock.notifyAll();
1614 }
1615 }
1616 });
1617 try {
1618 while (!eventDispatched) {
1619 waitLock.wait();
1620 }
1621 } catch (InterruptedException ie) {
1622 return false;
1623 }
1624 }
1625
1626 try {
1627 Thread.sleep(MINIMAL_EDELAY);
1628 } catch (InterruptedException ie) {
1629 throw new RuntimeException("Interrupted");
1630 }
1631
1632 flushPendingEvents();
1633
1634 // Lock to force write-cache flush for queueEmpty.
1635 synchronized (waitLock) {
1636 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1637 }
1638 }
1639
1640 /**
1641 * Grabs the mouse input for the given window. The window must be
1642 * visible. The window or its children do not receive any
1643 * additional mouse events besides those targeted to them. All
1644 * other events will be dispatched as before - to the respective
1645 * targets. This Window will receive UngrabEvent when automatic
1646 * ungrab is about to happen. The event can be listened to by
1647 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1648 * UngrabEvent class for the list of conditions when ungrab is
1649 * about to happen.
1650 * @see UngrabEvent
1651 */
1652 public abstract void grab(Window w);
1653
1654 /**
1655 * Forces ungrab. No event will be sent.
1656 */
1657 public abstract void ungrab(Window w);
1658
1659
1660 /**
1661 * Locates the splash screen library in a platform dependent way and closes
1662 * the splash screen. Should be invoked on first top-level frame display.
1663 * @see java.awt.SplashScreen
1664 * @since 1.6
1665 */
1666 public static native void closeSplashScreen();
1667
1668 /* The following methods and variables are to support retrieving
1669 * desktop text anti-aliasing settings
1670 */
1671
1672 /* Need an instance method because setDesktopProperty(..) is protected. */
1673 private void fireDesktopFontPropertyChanges() {
1674 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1675 SunToolkit.getDesktopFontHints());
1676 }
1677
1678 private static boolean checkedSystemAAFontSettings;
1679 private static boolean useSystemAAFontSettings;
1680 private static boolean lastExtraCondition = true;
1681 private static RenderingHints desktopFontHints;
1682
1683 /* Since Swing is the reason for this "extra condition" logic its
1684 * worth documenting it in some detail.
1685 * First, a goal is for Swing and applications to both retrieve and
1686 * use the same desktop property value so that there is complete
1687 * consistency between the settings used by JDK's Swing implementation
1688 * and 3rd party custom Swing components, custom L&Fs and any general
1689 * text rendering that wants to be consistent with these.
1690 * But by default on Solaris & Linux Swing will not use AA text over
1691 * remote X11 display (unless Xrender can be used which is TBD and may not
1692 * always be available anyway) as that is a noticeable performance hit.
1693 * So there needs to be a way to express that extra condition so that
1694 * it is seen by all clients of the desktop property API.
1695 * If this were the only condition it could be handled here as it would
1696 * be the same for any L&F and could reasonably be considered to be
1697 * a static behaviour of those systems.
1698 * But GTK currently has an additional test based on locale which is
1699 * not applied by Metal. So mixing GTK in a few locales with Metal
1700 * would mean the last one wins.
1701 * This could be stored per-app context which would work
1702 * for different applets, but wouldn't help for a single application
1703 * using GTK and some other L&F concurrently.
1704 * But it is expected this will be addressed within GTK and the font
1705 * system so is a temporary and somewhat unlikely harmless corner case.
1706 */
1707 public static void setAAFontSettingsCondition(boolean extraCondition) {
1708 if (extraCondition != lastExtraCondition) {
1709 lastExtraCondition = extraCondition;
1710 if (checkedSystemAAFontSettings) {
1711 /* Someone already asked for this info, under a different
1712 * condition.
1713 * We'll force re-evaluation instead of replicating the
1714 * logic, then notify any listeners of any change.
1715 */
1716 checkedSystemAAFontSettings = false;
1717 Toolkit tk = Toolkit.getDefaultToolkit();
1718 if (tk instanceof SunToolkit) {
1719 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1720 }
1721 }
1722 }
1723 }
1724
1725 /* "false", "off", ""default" aren't explicitly tested, they
1726 * just fall through to produce a null return which all are equated to
1727 * "false".
1728 */
1729 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1730 Object aaHint = null;
1731 hintname = hintname.toLowerCase(Locale.ENGLISH);
1732 if (hintname.equals("on")) {
1733 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1734 } else if (hintname.equals("gasp")) {
1735 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1736 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1737 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1738 } else if (hintname.equals("lcd_hbgr")) {
1739 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1740 } else if (hintname.equals("lcd_vrgb")) {
1741 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1742 } else if (hintname.equals("lcd_vbgr")) {
1743 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1744 }
1745 if (aaHint != null) {
1746 RenderingHints map = new RenderingHints(null);
1747 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1748 return map;
1749 } else {
1750 return null;
1751 }
1752 }
1753
1754 /* This method determines whether to use the system font settings,
1755 * or ignore them if a L&F has specified they should be ignored, or
1756 * to override both of these with a system property specified value.
1757 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1758 * system property isn't applied as desktop properties are considered
1759 * to be inapplicable in that case. In that headless case although
1760 * this method will return "true" the toolkit will return a null map.
1761 */
1762 private static boolean useSystemAAFontSettings() {
1763 if (!checkedSystemAAFontSettings) {
1764 useSystemAAFontSettings = true; /* initially set this true */
1765 String systemAAFonts = null;
1766 Toolkit tk = Toolkit.getDefaultToolkit();
1767 if (tk instanceof SunToolkit) {
1768 systemAAFonts =
1769 AccessController.doPrivileged(
1770 new GetPropertyAction("awt.useSystemAAFontSettings"));
1771 }
1772 if (systemAAFonts != null) {
1773 useSystemAAFontSettings =
1774 Boolean.valueOf(systemAAFonts).booleanValue();
1775 /* If it is anything other than "true", then it may be
1776 * a hint name , or it may be "off, "default", etc.
1777 */
1778 if (!useSystemAAFontSettings) {
1779 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1780 }
1781 }
1782 /* If its still true, apply the extra condition */
1783 if (useSystemAAFontSettings) {
1784 useSystemAAFontSettings = lastExtraCondition;
1785 }
1786 checkedSystemAAFontSettings = true;
1787 }
1788 return useSystemAAFontSettings;
1789 }
1790
1791 /* A variable defined for the convenience of JDK code */
1792 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1793
1794 /* Overridden by subclasses to return platform/desktop specific values */
1795 protected RenderingHints getDesktopAAHints() {
1796 return null;
1797 }
1798
1799 /* Subclass desktop property loading methods call this which
1800 * in turn calls the appropriate subclass implementation of
1801 * getDesktopAAHints() when system settings are being used.
1802 * Its public rather than protected because subclasses may delegate
1803 * to a helper class.
1804 */
1805 public static RenderingHints getDesktopFontHints() {
1806 if (useSystemAAFontSettings()) {
1807 Toolkit tk = Toolkit.getDefaultToolkit();
1808 if (tk instanceof SunToolkit) {
1809 Object map = ((SunToolkit)tk).getDesktopAAHints();
1810 return (RenderingHints)map;
1811 } else { /* Headless Toolkit */
1812 return null;
1813 }
1814 } else if (desktopFontHints != null) {
1815 /* cloning not necessary as the return value is cloned later, but
1816 * its harmless.
1817 */
1818 return (RenderingHints)(desktopFontHints.clone());
1819 } else {
1820 return null;
1821 }
1822 }
1823
1824
1825 public abstract boolean isDesktopSupported();
1826
1827 /*
1828 * consumeNextKeyTyped() method is not currently used,
1829 * however Swing could use it in the future.
1830 */
1831 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1832 try {
1833 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1834 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1835 getCurrentKeyboardFocusManager(),
1836 keyEvent);
1837 } catch (ClassCastException cce) {
1838 cce.printStackTrace();
1839 }
1840 }
1841
1842 protected static void dumpPeers(final PlatformLogger aLog) {
1843 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1844 }
1845
1846 /**
1847 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1848 * @return Window ancestor of the component or component by itself if it is Window;
1849 * null, if component is not a part of window hierarchy
1850 */
1851 public static Window getContainingWindow(Component comp) {
1852 while (comp != null && !(comp instanceof Window)) {
1853 comp = comp.getParent();
1854 }
1855 return (Window)comp;
1856 }
1857
1858 private static Boolean sunAwtDisableMixing = null;
1859
1860 /**
1861 * Returns the value of "sun.awt.disableMixing" property. Default
1862 * value is {@code false}.
1863 */
1864 public synchronized static boolean getSunAwtDisableMixing() {
1865 if (sunAwtDisableMixing == null) {
1866 sunAwtDisableMixing = AccessController.doPrivileged(
1867 new GetBooleanAction("sun.awt.disableMixing"));
1868 }
1869 return sunAwtDisableMixing.booleanValue();
1870 }
1871
1872 /**
1873 * Returns true if the native GTK libraries are available. The
1874 * default implementation returns false, but UNIXToolkit overrides this
1875 * method to provide a more specific answer.
1876 */
1877 public boolean isNativeGTKAvailable() {
1878 return false;
1879 }
1880
1881 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1882
1883 public synchronized void setWindowDeactivationTime(Window w, long time) {
1884 AppContext ctx = getAppContext(w);
1885 @SuppressWarnings("unchecked")
1886 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1887 if (map == null) {
1888 map = new WeakHashMap<Window, Long>();
1889 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1890 }
1891 map.put(w, time);
1892 }
1893
1894 public synchronized long getWindowDeactivationTime(Window w) {
1895 AppContext ctx = getAppContext(w);
1896 @SuppressWarnings("unchecked")
1897 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1898 if (map == null) {
1899 return -1;
1900 }
1901 Long time = map.get(w);
1902 return time == null ? -1 : time;
1903 }
1904
1905 // Cosntant alpha
1906 public boolean isWindowOpacitySupported() {
1907 return false;
1908 }
1909
1910 // Shaping
1911 public boolean isWindowShapingSupported() {
1912 return false;
1913 }
1914
1915 // Per-pixel alpha
1916 public boolean isWindowTranslucencySupported() {
1917 return false;
1918 }
1919
1920 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1921 return false;
1922 }
1923
1924 /**
1925 * Returns true if swing backbuffer should be translucent.
1926 */
1927 public boolean isSwingBackbufferTranslucencySupported() {
1928 return false;
1929 }
1930
1931 /**
1932 * Returns whether or not a containing top level window for the passed
1933 * component is
1934 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1935 *
1936 * @param c a Component which toplevel's to check
1937 * @return {@code true} if the passed component is not null and has a
1938 * containing toplevel window which is opaque (so per-pixel translucency
1939 * is not enabled), {@code false} otherwise
1940 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1941 */
1942 public static boolean isContainingTopLevelOpaque(Component c) {
1943 Window w = getContainingWindow(c);
1944 return w != null && w.isOpaque();
1945 }
1946
1947 /**
1948 * Returns whether or not a containing top level window for the passed
1949 * component is
1950 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1951 *
1952 * @param c a Component which toplevel's to check
1953 * @return {@code true} if the passed component is not null and has a
1954 * containing toplevel window which has opacity less than
1955 * 1.0f (which means that it is translucent), {@code false} otherwise
1956 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1957 */
1958 public static boolean isContainingTopLevelTranslucent(Component c) {
1959 Window w = getContainingWindow(c);
1960 return w != null && w.getOpacity() < 1.0f;
1961 }
1962
1963 /**
1964 * Returns whether the native system requires using the peer.updateWindow()
1965 * method to update the contents of a non-opaque window, or if usual
1966 * painting procedures are sufficient. The default return value covers
1967 * the X11 systems. On MS Windows this method is overriden in WToolkit
1968 * to return true.
1969 */
1970 public boolean needUpdateWindow() {
1971 return false;
1972 }
1973
1974 /**
1975 * Descendants of the SunToolkit should override and put their own logic here.
1976 */
1977 public int getNumberOfButtons(){
1978 return 3;
1979 }
1980
1981 /**
1982 * Checks that the given object implements/extends the given
1983 * interface/class.
1984 *
1985 * Note that using the instanceof operator causes a class to be loaded.
1986 * Using this method doesn't load a class and it can be used instead of
1987 * the instanceof operator for performance reasons.
1988 *
1989 * @param obj Object to be checked
1990 * @param type The name of the interface/class. Must be
1991 * fully-qualified interface/class name.
1992 * @return true, if this object implements/extends the given
1993 * interface/class, false, otherwise, or if obj or type is null
1994 */
1995 public static boolean isInstanceOf(Object obj, String type) {
1996 if (obj == null) return false;
1997 if (type == null) return false;
1998
1999 return isInstanceOf(obj.getClass(), type);
2000 }
2001
2002 private static boolean isInstanceOf(Class<?> cls, String type) {
2003 if (cls == null) return false;
2004
2005 if (cls.getName().equals(type)) {
2006 return true;
2007 }
2008
2009 for (Class<?> c : cls.getInterfaces()) {
2010 if (c.getName().equals(type)) {
2011 return true;
2012 }
2013 }
2014 return isInstanceOf(cls.getSuperclass(), type);
2015 }
2016
2017 protected static LightweightFrame getLightweightFrame(Component c) {
2018 for (; c != null; c = c.getParent()) {
2019 if (c instanceof LightweightFrame) {
2020 return (LightweightFrame)c;
2021 }
2022 if (c instanceof Window) {
2023 // Don't traverse owner windows
2024 return null;
2025 }
2026 }
2027 return null;
2028 }
2029
2030 ///////////////////////////////////////////////////////////////////////////
2031 //
2032 // The following methods help set and identify whether a particular
2033 // AWTEvent object was produced by the system or by user code. As of this
2034 // writing the only consumer is the Java Plug-In, although this information
2035 // could be useful to more clients and probably should be formalized in
2036 // the public API.
2037 //
2038 ///////////////////////////////////////////////////////////////////////////
2039
2040 public static void setSystemGenerated(AWTEvent e) {
2041 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2042 }
2043
2044 public static boolean isSystemGenerated(AWTEvent e) {
2045 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2046 }
2047
2048 } // class SunToolkit
2049
2050
2051 /*
2052 * PostEventQueue is a Thread that runs in the same AppContext as the
2053 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2054 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2055 * events to this queue, which then calls EventQueue.postEvent().
2056 *
2057 * We do this because EventQueue.postEvent() may be overridden by client
2058 * code, and we mustn't ever call client code from the toolkit thread.
2059 */
2060 class PostEventQueue {
2061 private EventQueueItem queueHead = null;
2062 private EventQueueItem queueTail = null;
2063 private final EventQueue eventQueue;
2064
2065 private Thread flushThread = null;
2066
2067 PostEventQueue(EventQueue eq) {
2068 eventQueue = eq;
2069 }
2070
2071 /*
2072 * Continually post pending AWTEvents to the Java EventQueue. The method
2073 * is synchronized to ensure the flush is completed before a new event
2074 * can be posted to this queue.
2075 *
2076 * 7177040: The method couldn't be wholly synchronized because of calls
2077 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2078 * potentially lead to deadlock
2079 */
2080 public void flush() {
2081
2082 Thread newThread = Thread.currentThread();
2083
2084 try {
2085 EventQueueItem tempQueue;
2086 synchronized (this) {
2087 // Avoid method recursion
2088 if (newThread == flushThread) {
2089 return;
2090 }
2091 // Wait for other threads' flushing
2092 while (flushThread != null) {
2093 wait();
2094 }
2095 // Skip everything if queue is empty
2096 if (queueHead == null) {
2097 return;
2098 }
2099 // Remember flushing thread
2100 flushThread = newThread;
2101
2102 tempQueue = queueHead;
2103 queueHead = queueTail = null;
2104 }
2105 try {
2106 while (tempQueue != null) {
2107 eventQueue.postEvent(tempQueue.event);
2108 tempQueue = tempQueue.next;
2109 }
2110 }
2111 finally {
2112 // Only the flushing thread can get here
2113 synchronized (this) {
2114 // Forget flushing thread, inform other pending threads
2115 flushThread = null;
2116 notifyAll();
2117 }
2118 }
2119 }
2120 catch (InterruptedException e) {
2121 // Couldn't allow exception go up, so at least recover the flag
2122 newThread.interrupt();
2123 }
2124 }
2125
2126 /*
2127 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2128 */
2129 void postEvent(AWTEvent event) {
2130 EventQueueItem item = new EventQueueItem(event);
2131
2132 synchronized (this) {
2133 if (queueHead == null) {
2134 queueHead = queueTail = item;
2135 } else {
2136 queueTail.next = item;
2137 queueTail = item;
2138 }
2139 }
2140 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2141 }
2142 } // class PostEventQueue