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