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 @SuppressWarnings("deprecation")
717 static final SoftCache imgCache = new SoftCache();
718
719 static Image getImageFromHash(Toolkit tk, URL url) {
720 checkPermissions(url);
721 synchronized (imgCache) {
722 Image img = (Image)imgCache.get(url);
723 if (img == null) {
724 try {
725 img = tk.createImage(new URLImageSource(url));
726 imgCache.put(url, img);
727 } catch (Exception e) {
728 }
729 }
730 return img;
731 }
732 }
733
734 static Image getImageFromHash(Toolkit tk,
735 String filename) {
736 checkPermissions(filename);
737 synchronized (imgCache) {
738 Image img = (Image)imgCache.get(filename);
739 if (img == null) {
740 try {
741 img = tk.createImage(new FileImageSource(filename));
742 imgCache.put(filename, img);
743 } catch (Exception e) {
744 }
745 }
746 return img;
747 }
748 }
749
750 public Image getImage(String filename) {
751 return getImageFromHash(this, filename);
752 }
753
754 public Image getImage(URL url) {
755 return getImageFromHash(this, url);
756 }
757
758 protected Image getImageWithResolutionVariant(String fileName,
759 String resolutionVariantName) {
760 synchronized (imgCache) {
761 Image image = getImageFromHash(this, fileName);
762 if (image instanceof MultiResolutionImage) {
763 return image;
764 }
765 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
766 image = createImageWithResolutionVariant(image, resolutionVariant);
767 imgCache.put(fileName, image);
768 return image;
769 }
770 }
771
772 protected Image getImageWithResolutionVariant(URL url,
773 URL resolutionVariantURL) {
774 synchronized (imgCache) {
775 Image image = getImageFromHash(this, url);
776 if (image instanceof MultiResolutionImage) {
777 return image;
778 }
779 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
780 image = createImageWithResolutionVariant(image, resolutionVariant);
781 imgCache.put(url, image);
782 return image;
783 }
784 }
785
786
787 public Image createImage(String filename) {
788 checkPermissions(filename);
789 return createImage(new FileImageSource(filename));
790 }
791
792 public Image createImage(URL url) {
793 checkPermissions(url);
794 return createImage(new URLImageSource(url));
795 }
796
797 public Image createImage(byte[] data, int offset, int length) {
798 return createImage(new ByteArrayImageSource(data, offset, length));
799 }
800
801 public Image createImage(ImageProducer producer) {
802 return new ToolkitImage(producer);
803 }
804
805 public static Image createImageWithResolutionVariant(Image image,
806 Image resolutionVariant) {
807 return new MultiResolutionToolkitImage(image, resolutionVariant);
808 }
809
810 public int checkImage(Image img, int w, int h, ImageObserver o) {
811 if (!(img instanceof ToolkitImage)) {
812 return ImageObserver.ALLBITS;
813 }
814
815 ToolkitImage tkimg = (ToolkitImage)img;
816 int repbits;
817 if (w == 0 || h == 0) {
818 repbits = ImageObserver.ALLBITS;
819 } else {
820 repbits = tkimg.getImageRep().check(o);
821 }
822 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
823 }
824
825 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
826 if (w == 0 || h == 0) {
827 return true;
828 }
829
830 // Must be a ToolkitImage
831 if (!(img instanceof ToolkitImage)) {
832 return true;
833 }
834
835 ToolkitImage tkimg = (ToolkitImage)img;
836 if (tkimg.hasError()) {
837 if (o != null) {
838 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
839 -1, -1, -1, -1);
840 }
841 return false;
842 }
843 ImageRepresentation ir = tkimg.getImageRep();
844 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
845 }
846
847 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
848 ToolkitImage rvImage = getResolutionVariant(img);
849 int rvw = getRVSize(w);
850 int rvh = getRVSize(h);
851 // Ignore the resolution variant in case of error
852 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
853 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
854 getResolutionVariantObserver(
855 img, o, w, h, rvw, rvh, true));
856 }
857
858 private boolean prepareResolutionVariant(Image img, int w, int h,
859 ImageObserver o) {
860
861 ToolkitImage rvImage = getResolutionVariant(img);
862 int rvw = getRVSize(w);
863 int rvh = getRVSize(h);
864 // Ignore the resolution variant in case of error
865 return rvImage == null || rvImage.hasError() || prepareImage(
866 rvImage, rvw, rvh,
867 MultiResolutionToolkitImage.getResolutionVariantObserver(
868 img, o, w, h, rvw, rvh, true));
869 }
870
871 private static int getRVSize(int size){
872 return size == -1 ? -1 : 2 * size;
873 }
874
875 private static ToolkitImage getResolutionVariant(Image image) {
876 if (image instanceof MultiResolutionToolkitImage) {
877 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
878 getResolutionVariant();
879 if (resolutionVariant instanceof ToolkitImage) {
880 return (ToolkitImage) resolutionVariant;
881 }
882 }
883 return null;
884 }
885
886 protected static boolean imageCached(Object key) {
887 return imgCache.containsKey(key);
888 }
889
890 protected static boolean imageExists(String filename) {
891 checkPermissions(filename);
892 return filename != null && new File(filename).exists();
893 }
894
895 @SuppressWarnings("try")
896 protected static boolean imageExists(URL url) {
897 checkPermissions(url);
898 if (url != null) {
899 try (InputStream is = url.openStream()) {
900 return true;
901 }catch(IOException e){
902 return false;
903 }
904 }
905 return false;
906 }
907
908 private static void checkPermissions(String filename) {
909 SecurityManager security = System.getSecurityManager();
910 if (security != null) {
911 security.checkRead(filename);
912 }
913 }
914
915 private static void checkPermissions(URL url) {
916 SecurityManager sm = System.getSecurityManager();
917 if (sm != null) {
918 try {
919 java.security.Permission perm =
920 url.openConnection().getPermission();
921 if (perm != null) {
922 try {
923 sm.checkPermission(perm);
924 } catch (SecurityException se) {
925 // fallback to checkRead/checkConnect for pre 1.2
926 // security managers
927 if ((perm instanceof java.io.FilePermission) &&
928 perm.getActions().indexOf("read") != -1) {
929 sm.checkRead(perm.getName());
930 } else if ((perm instanceof
931 java.net.SocketPermission) &&
932 perm.getActions().indexOf("connect") != -1) {
933 sm.checkConnect(url.getHost(), url.getPort());
934 } else {
935 throw se;
936 }
937 }
938 }
939 } catch (java.io.IOException ioe) {
940 sm.checkConnect(url.getHost(), url.getPort());
941 }
942 }
943 }
944
945 /**
946 * Scans {@code imageList} for best-looking image of specified dimensions.
947 * Image can be scaled and/or padded with transparency.
948 */
949 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
950 if (width == 0 || height == 0) {
951 return null;
952 }
953 Image bestImage = null;
954 int bestWidth = 0;
955 int bestHeight = 0;
956 double bestSimilarity = 3; //Impossibly high value
957 double bestScaleFactor = 0;
958 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
959 //Iterate imageList looking for best matching image.
960 //'Similarity' measure is defined as good scale factor and small insets.
961 //best possible similarity is 0 (no scale, no insets).
962 //It's found while the experiments that good-looking result is achieved
963 //with scale factors x1, x3/4, x2/3, xN, x1/N.
964 Image im = i.next();
965 if (im == null) {
966 continue;
967 }
968 if (im instanceof ToolkitImage) {
969 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
970 ir.reconstruct(ImageObserver.ALLBITS);
971 }
972 int iw;
973 int ih;
974 try {
975 iw = im.getWidth(null);
976 ih = im.getHeight(null);
977 } catch (Exception e){
978 continue;
979 }
980 if (iw > 0 && ih > 0) {
981 //Calc scale factor
982 double scaleFactor = Math.min((double)width / (double)iw,
983 (double)height / (double)ih);
984 //Calculate scaled image dimensions
985 //adjusting scale factor to nearest "good" value
986 int adjw = 0;
987 int adjh = 0;
988 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
989 if (scaleFactor >= 2) {
990 //Need to enlarge image more than twice
991 //Round down scale factor to multiply by integer value
992 scaleFactor = Math.floor(scaleFactor);
993 adjw = iw * (int)scaleFactor;
994 adjh = ih * (int)scaleFactor;
995 scaleMeasure = 1.0 - 0.5 / scaleFactor;
996 } else if (scaleFactor >= 1) {
997 //Don't scale
998 scaleFactor = 1.0;
999 adjw = iw;
1000 adjh = ih;
1001 scaleMeasure = 0;
1002 } else if (scaleFactor >= 0.75) {
1003 //Multiply by 3/4
1004 scaleFactor = 0.75;
1005 adjw = iw * 3 / 4;
1006 adjh = ih * 3 / 4;
1007 scaleMeasure = 0.3;
1008 } else if (scaleFactor >= 0.6666) {
1009 //Multiply by 2/3
1010 scaleFactor = 0.6666;
1011 adjw = iw * 2 / 3;
1012 adjh = ih * 2 / 3;
1013 scaleMeasure = 0.33;
1014 } else {
1015 //Multiply size by 1/scaleDivider
1016 //where scaleDivider is minimum possible integer
1017 //larger than 1/scaleFactor
1018 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1019 scaleFactor = 1.0 / scaleDivider;
1020 adjw = (int)Math.round((double)iw / scaleDivider);
1021 adjh = (int)Math.round((double)ih / scaleDivider);
1022 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1023 }
1024 double similarity = ((double)width - (double)adjw) / (double)width +
1025 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1026 scaleMeasure; //Large rescale is bad
1027 if (similarity < bestSimilarity) {
1028 bestSimilarity = similarity;
1029 bestScaleFactor = scaleFactor;
1030 bestImage = im;
1031 bestWidth = adjw;
1032 bestHeight = adjh;
1033 }
1034 if (similarity == 0) break;
1035 }
1036 }
1037 if (bestImage == null) {
1038 //No images were found, possibly all are broken
1039 return null;
1040 }
1041 BufferedImage bimage =
1042 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1043 Graphics2D g = bimage.createGraphics();
1044 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1045 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1046 try {
1047 int x = (width - bestWidth) / 2;
1048 int y = (height - bestHeight) / 2;
1049 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1050 } finally {
1051 g.dispose();
1052 }
1053 return bimage;
1054 }
1055
1056 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1057 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1058 if (bimage == null) {
1059 return null;
1060 }
1061 Raster raster = bimage.getRaster();
1062 DataBuffer buffer = raster.getDataBuffer();
1063 return (DataBufferInt)buffer;
1064 }
1065
1066 protected EventQueue getSystemEventQueueImpl() {
1067 return getSystemEventQueueImplPP();
1068 }
1069
1070 // Package private implementation
1071 static EventQueue getSystemEventQueueImplPP() {
1072 return getSystemEventQueueImplPP(AppContext.getAppContext());
1073 }
1074
1075 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1076 EventQueue theEventQueue =
1077 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1078 return theEventQueue;
1079 }
1080
1081 /**
1082 * Give native peers the ability to query the native container
1083 * given a native component (eg the direct parent may be lightweight).
1084 */
1085 public static Container getNativeContainer(Component c) {
1086 return Toolkit.getNativeContainer(c);
1087 }
1088
1089 /**
1090 * Gives native peers the ability to query the closest HW component.
1091 * If the given component is heavyweight, then it returns this. Otherwise,
1092 * it goes one level up in the hierarchy and tests next component.
1093 */
1094 public static Component getHeavyweightComponent(Component c) {
1095 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1096 c = AWTAccessor.getComponentAccessor().getParent(c);
1097 }
1098 return c;
1099 }
1100
1101 /**
1102 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1103 */
1104 public int getFocusAcceleratorKeyMask() {
1105 return InputEvent.ALT_MASK;
1106 }
1107
1108 /**
1109 * Tests whether specified key modifiers mask can be used to enter a printable
1110 * character. This is a default implementation of this method, which reflects
1111 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1112 * characters from the extended character set (like euro sign or math symbols)
1113 */
1114 public boolean isPrintableCharacterModifiersMask(int mods) {
1115 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1116 }
1117
1118 /**
1119 * Returns whether popup is allowed to be shown above the task bar.
1120 * This is a default implementation of this method, which checks
1121 * corresponding security permission.
1122 */
1123 public boolean canPopupOverlapTaskBar() {
1124 boolean result = true;
1125 try {
1126 SecurityManager sm = System.getSecurityManager();
1127 if (sm != null) {
1128 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1129 }
1130 } catch (SecurityException se) {
1131 // There is no permission to show popups over the task bar
1132 result = false;
1133 }
1134 return result;
1135 }
1136
1137 /**
1138 * Returns a new input method window, with behavior as specified in
1139 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1140 * If the inputContext is not null, the window should return it from its
1141 * getInputContext() method. The window needs to implement
1142 * sun.awt.im.InputMethodWindow.
1143 * <p>
1144 * SunToolkit subclasses can override this method to return better input
1145 * method windows.
1146 */
1147 public Window createInputMethodWindow(String title, InputContext context) {
1148 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1149 }
1150
1151 /**
1152 * Returns whether enableInputMethods should be set to true for peered
1153 * TextComponent instances on this platform. False by default.
1154 */
1155 public boolean enableInputMethodsForTextComponent() {
1156 return false;
1157 }
1158
1159 private static Locale startupLocale = null;
1160
1161 /**
1162 * Returns the locale in which the runtime was started.
1163 */
1164 public static Locale getStartupLocale() {
1165 if (startupLocale == null) {
1166 String language, region, country, variant;
1167 language = AccessController.doPrivileged(
1168 new GetPropertyAction("user.language", "en"));
1169 // for compatibility, check for old user.region property
1170 region = AccessController.doPrivileged(
1171 new GetPropertyAction("user.region"));
1172 if (region != null) {
1173 // region can be of form country, country_variant, or _variant
1174 int i = region.indexOf('_');
1175 if (i >= 0) {
1176 country = region.substring(0, i);
1177 variant = region.substring(i + 1);
1178 } else {
1179 country = region;
1180 variant = "";
1181 }
1182 } else {
1183 country = AccessController.doPrivileged(
1184 new GetPropertyAction("user.country", ""));
1185 variant = AccessController.doPrivileged(
1186 new GetPropertyAction("user.variant", ""));
1187 }
1188 startupLocale = new Locale(language, country, variant);
1189 }
1190 return startupLocale;
1191 }
1192
1193 /**
1194 * Returns the default keyboard locale of the underlying operating system
1195 */
1196 public Locale getDefaultKeyboardLocale() {
1197 return getStartupLocale();
1198 }
1199
1200 private static DefaultMouseInfoPeer mPeer = null;
1201
1202 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1203 if (mPeer == null) {
1204 mPeer = new DefaultMouseInfoPeer();
1205 }
1206 return mPeer;
1207 }
1208
1209
1210 /**
1211 * Returns whether default toolkit needs the support of the xembed
1212 * from embedding host(if any).
1213 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1214 */
1215 public static boolean needsXEmbed() {
1216 String noxembed = AccessController.
1217 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1218 if ("true".equals(noxembed)) {
1219 return false;
1220 }
1221
1222 Toolkit tk = Toolkit.getDefaultToolkit();
1223 if (tk instanceof SunToolkit) {
1224 // SunToolkit descendants should override this method to specify
1225 // concrete behavior
1226 return ((SunToolkit)tk).needsXEmbedImpl();
1227 } else {
1228 // Non-SunToolkit doubtly might support XEmbed
1229 return false;
1230 }
1231 }
1232
1233 /**
1234 * Returns whether this toolkit needs the support of the xembed
1235 * from embedding host(if any).
1236 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1237 */
1238 protected boolean needsXEmbedImpl() {
1239 return false;
1240 }
1241
1242 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1243
1244 /**
1245 * Returns whether the XEmbed server feature is requested by
1246 * developer. If true, Toolkit should return an
1247 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1248 */
1249 protected final boolean isXEmbedServerRequested() {
1250 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1251 }
1252
1253 /**
1254 * Returns whether the modal exclusion API is supported by the current toolkit.
1255 * When it isn't supported, calling <code>setModalExcluded</code> has no
1256 * effect, and <code>isModalExcluded</code> returns false for all windows.
1257 *
1258 * @return true if modal exclusion is supported by the toolkit, false otherwise
1259 *
1260 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1261 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1262 *
1263 * @since 1.5
1264 */
1265 public static boolean isModalExcludedSupported()
1266 {
1267 Toolkit tk = Toolkit.getDefaultToolkit();
1268 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1269 }
1270 /*
1271 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1272 *
1273 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1274 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1275 *
1276 * @since 1.5
1277 */
1278 protected boolean isModalExcludedSupportedImpl()
1279 {
1280 return false;
1281 }
1282
1283 /*
1284 * Sets this window to be excluded from being modally blocked. When the
1285 * toolkit supports modal exclusion and this method is called, input
1286 * events, focus transfer and z-order will continue to work for the
1287 * window, it's owned windows and child components, even in the
1288 * presence of a modal dialog.
1289 * For details on which <code>Window</code>s are normally blocked
1290 * by modal dialog, see {@link java.awt.Dialog}.
1291 * Invoking this method when the modal exclusion API is not supported by
1292 * the current toolkit has no effect.
1293 * @param window Window to be marked as not modally blocked
1294 * @see java.awt.Dialog
1295 * @see java.awt.Dialog#setModal(boolean)
1296 * @see sun.awt.SunToolkit#isModalExcludedSupported
1297 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1298 */
1299 public static void setModalExcluded(Window window)
1300 {
1301 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1302 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1303 }
1304 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1305 }
1306
1307 /*
1308 * Returns whether the specified window is blocked by modal dialogs.
1309 * If the modal exclusion API isn't supported by the current toolkit,
1310 * it returns false for all windows.
1311 *
1312 * @param window Window to test for modal exclusion
1313 *
1314 * @return true if the window is modal excluded, false otherwise. If
1315 * the modal exclusion isn't supported by the current Toolkit, false
1316 * is returned
1317 *
1318 * @see sun.awt.SunToolkit#isModalExcludedSupported
1319 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1320 *
1321 * @since 1.5
1322 */
1323 public static boolean isModalExcluded(Window window)
1324 {
1325 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1326 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1327 }
1328 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1329 }
1330
1331 /**
1332 * Overridden in XToolkit and WToolkit
1333 */
1334 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1335 return (modalityType == Dialog.ModalityType.MODELESS) ||
1336 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1337 }
1338
1339 /**
1340 * Overridden in XToolkit and WToolkit
1341 */
1342 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1343 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1344 }
1345
1346 ///////////////////////////////////////////////////////////////////////////
1347 //
1348 // The following is used by the Java Plug-in to coordinate dialog modality
1349 // between containing applications (browsers, ActiveX containers etc) and
1350 // the AWT.
1351 //
1352 ///////////////////////////////////////////////////////////////////////////
1353
1354 private ModalityListenerList modalityListeners = new ModalityListenerList();
1355
1356 public void addModalityListener(ModalityListener listener) {
1357 modalityListeners.add(listener);
1358 }
1359
1360 public void removeModalityListener(ModalityListener listener) {
1361 modalityListeners.remove(listener);
1362 }
1363
1364 public void notifyModalityPushed(Dialog dialog) {
1365 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1366 }
1367
1368 public void notifyModalityPopped(Dialog dialog) {
1369 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1370 }
1371
1372 final void notifyModalityChange(int id, Dialog source) {
1373 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1374 ev.dispatch();
1375 }
1376
1377 static class ModalityListenerList implements ModalityListener {
1378
1379 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1380
1381 void add(ModalityListener listener) {
1382 listeners.addElement(listener);
1383 }
1384
1385 void remove(ModalityListener listener) {
1386 listeners.removeElement(listener);
1387 }
1388
1389 public void modalityPushed(ModalityEvent ev) {
1390 Iterator<ModalityListener> it = listeners.iterator();
1391 while (it.hasNext()) {
1392 it.next().modalityPushed(ev);
1393 }
1394 }
1395
1396 public void modalityPopped(ModalityEvent ev) {
1397 Iterator<ModalityListener> it = listeners.iterator();
1398 while (it.hasNext()) {
1399 it.next().modalityPopped(ev);
1400 }
1401 }
1402 } // end of class ModalityListenerList
1403
1404 ///////////////////////////////////////////////////////////////////////////
1405 // End Plug-in code
1406 ///////////////////////////////////////////////////////////////////////////
1407
1408 public static boolean isLightweightOrUnknown(Component comp) {
1409 if (comp.isLightweight()
1410 || !(getDefaultToolkit() instanceof SunToolkit))
1411 {
1412 return true;
1413 }
1414 return !(comp instanceof Button
1415 || comp instanceof Canvas
1416 || comp instanceof Checkbox
1417 || comp instanceof Choice
1418 || comp instanceof Label
1419 || comp instanceof java.awt.List
1420 || comp instanceof Panel
1421 || comp instanceof Scrollbar
1422 || comp instanceof ScrollPane
1423 || comp instanceof TextArea
1424 || comp instanceof TextField
1425 || comp instanceof Window);
1426 }
1427
1428 @SuppressWarnings("serial")
1429 public static class OperationTimedOut extends RuntimeException {
1430 public OperationTimedOut(String msg) {
1431 super(msg);
1432 }
1433 public OperationTimedOut() {
1434 }
1435 }
1436
1437 @SuppressWarnings("serial")
1438 public static class InfiniteLoop extends RuntimeException {
1439 }
1440
1441 @SuppressWarnings("serial")
1442 public static class IllegalThreadException extends RuntimeException {
1443 public IllegalThreadException(String msg) {
1444 super(msg);
1445 }
1446 public IllegalThreadException() {
1447 }
1448 }
1449
1450 public static final int DEFAULT_WAIT_TIME = 10000;
1451 private static final int MAX_ITERS = 20;
1452 private static final int MIN_ITERS = 0;
1453 private static final int MINIMAL_EDELAY = 0;
1454
1455 /**
1456 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1457 */
1458 public void realSync() throws OperationTimedOut, InfiniteLoop {
1459 realSync(DEFAULT_WAIT_TIME);
1460 }
1461
1462 /**
1463 * Forces toolkit to synchronize with the native windowing
1464 * sub-system, flushing all pending work and waiting for all the
1465 * events to be processed. This method guarantees that after
1466 * return no additional Java events will be generated, unless
1467 * cause by user. Obviously, the method cannot be used on the
1468 * event dispatch thread (EDT). In case it nevertheless gets
1469 * invoked on this thread, the method throws the
1470 * IllegalThreadException runtime exception.
1471 *
1472 * <p> This method allows to write tests without explicit timeouts
1473 * or wait for some event. Example:
1474 * <code>
1475 * Frame f = ...;
1476 * f.setVisible(true);
1477 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1478 * </code>
1479 *
1480 * <p> After realSync, <code>f</code> will be completely visible
1481 * on the screen, its getLocationOnScreen will be returning the
1482 * right result and it will be the focus owner.
1483 *
1484 * <p> Another example:
1485 * <code>
1486 * b.requestFocus();
1487 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1488 * </code>
1489 *
1490 * <p> After realSync, <code>b</code> will be focus owner.
1491 *
1492 * <p> Notice that realSync isn't guaranteed to work if recurring
1493 * actions occur, such as if during processing of some event
1494 * another request which may generate some events occurs. By
1495 * default, sync tries to perform as much as {@value MAX_ITERS}
1496 * cycles of event processing, allowing for roughly {@value
1497 * MAX_ITERS} additional requests.
1498 *
1499 * <p> For example, requestFocus() generates native request, which
1500 * generates one or two Java focus events, which then generate a
1501 * serie of paint events, a serie of Java focus events, which then
1502 * generate a serie of paint events which then are processed -
1503 * three cycles, minimum.
1504 *
1505 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1506 */
1507 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1508 {
1509 if (EventQueue.isDispatchThread()) {
1510 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1511 }
1512 int bigLoop = 0;
1513 do {
1514 // Let's do sync first
1515 sync();
1516
1517 // During the wait process, when we were processing incoming
1518 // events, we could have made some new request, which can
1519 // generate new events. Example: MapNotify/XSetInputFocus.
1520 // Therefore, we dispatch them as long as there is something
1521 // to dispatch.
1522 int iters = 0;
1523 while (iters < MIN_ITERS) {
1524 syncNativeQueue(timeout);
1525 iters++;
1526 }
1527 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1528 iters++;
1529 }
1530 if (iters >= MAX_ITERS) {
1531 throw new InfiniteLoop();
1532 }
1533
1534 // native requests were dispatched by X/Window Manager or Windows
1535 // Moreover, we processed them all on Toolkit thread
1536 // Now wait while EDT processes them.
1537 //
1538 // During processing of some events (focus, for example),
1539 // some other events could have been generated. So, after
1540 // waitForIdle, we may end up with full EventQueue
1541 iters = 0;
1542 while (iters < MIN_ITERS) {
1543 waitForIdle(timeout);
1544 iters++;
1545 }
1546 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1547 iters++;
1548 }
1549 if (iters >= MAX_ITERS) {
1550 throw new InfiniteLoop();
1551 }
1552
1553 bigLoop++;
1554 // Again, for Java events, it was simple to check for new Java
1555 // events by checking event queue, but what if Java events
1556 // resulted in native requests? Therefor, check native events again.
1557 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1558 }
1559
1560 /**
1561 * Platform toolkits need to implement this method to perform the
1562 * sync of the native queue. The method should wait until native
1563 * requests are processed, all native events are processed and
1564 * corresponding Java events are generated. Should return
1565 * <code>true</code> if some events were processed,
1566 * <code>false</code> otherwise.
1567 */
1568 protected abstract boolean syncNativeQueue(final long timeout);
1569
1570 private boolean eventDispatched = false;
1571 private boolean queueEmpty = false;
1572 private final Object waitLock = "Wait Lock";
1573
1574 private boolean isEQEmpty() {
1575 EventQueue queue = getSystemEventQueueImpl();
1576 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1577 }
1578
1579 /**
1580 * Waits for the Java event queue to empty. Ensures that all
1581 * events are processed (including paint events), and that if
1582 * recursive events were generated, they are also processed.
1583 * Should return <code>true</code> if more processing is
1584 * necessary, <code>false</code> otherwise.
1585 */
1586 @SuppressWarnings("serial")
1587 protected final boolean waitForIdle(final long timeout) {
1588 flushPendingEvents();
1589 boolean queueWasEmpty = isEQEmpty();
1590 queueEmpty = false;
1591 eventDispatched = false;
1592 synchronized(waitLock) {
1593 postEvent(AppContext.getAppContext(),
1594 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1595 public void dispatch() {
1596 // Here we block EDT. It could have some
1597 // events, it should have dispatched them by
1598 // now. So native requests could have been
1599 // generated. First, dispatch them. Then,
1600 // flush Java events again.
1601 int iters = 0;
1602 while (iters < MIN_ITERS) {
1603 syncNativeQueue(timeout);
1604 iters++;
1605 }
1606 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1607 iters++;
1608 }
1609 flushPendingEvents();
1610
1611 synchronized(waitLock) {
1612 queueEmpty = isEQEmpty();
1613 eventDispatched = true;
1614 waitLock.notifyAll();
1615 }
1616 }
1617 });
1618 try {
1619 while (!eventDispatched) {
1620 waitLock.wait();
1621 }
1622 } catch (InterruptedException ie) {
1623 return false;
1624 }
1625 }
1626
1627 try {
1628 Thread.sleep(MINIMAL_EDELAY);
1629 } catch (InterruptedException ie) {
1630 throw new RuntimeException("Interrupted");
1631 }
1632
1633 flushPendingEvents();
1634
1635 // Lock to force write-cache flush for queueEmpty.
1636 synchronized (waitLock) {
1637 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1638 }
1639 }
1640
1641 /**
1642 * Grabs the mouse input for the given window. The window must be
1643 * visible. The window or its children do not receive any
1644 * additional mouse events besides those targeted to them. All
1645 * other events will be dispatched as before - to the respective
1646 * targets. This Window will receive UngrabEvent when automatic
1647 * ungrab is about to happen. The event can be listened to by
1648 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1649 * UngrabEvent class for the list of conditions when ungrab is
1650 * about to happen.
1651 * @see UngrabEvent
1652 */
1653 public abstract void grab(Window w);
1654
1655 /**
1656 * Forces ungrab. No event will be sent.
1657 */
1658 public abstract void ungrab(Window w);
1659
1660
1661 /**
1662 * Locates the splash screen library in a platform dependent way and closes
1663 * the splash screen. Should be invoked on first top-level frame display.
1664 * @see java.awt.SplashScreen
1665 * @since 1.6
1666 */
1667 public static native void closeSplashScreen();
1668
1669 /* The following methods and variables are to support retrieving
1670 * desktop text anti-aliasing settings
1671 */
1672
1673 /* Need an instance method because setDesktopProperty(..) is protected. */
1674 private void fireDesktopFontPropertyChanges() {
1675 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1676 SunToolkit.getDesktopFontHints());
1677 }
1678
1679 private static boolean checkedSystemAAFontSettings;
1680 private static boolean useSystemAAFontSettings;
1681 private static boolean lastExtraCondition = true;
1682 private static RenderingHints desktopFontHints;
1683
1684 /* Since Swing is the reason for this "extra condition" logic its
1685 * worth documenting it in some detail.
1686 * First, a goal is for Swing and applications to both retrieve and
1687 * use the same desktop property value so that there is complete
1688 * consistency between the settings used by JDK's Swing implementation
1689 * and 3rd party custom Swing components, custom L&Fs and any general
1690 * text rendering that wants to be consistent with these.
1691 * But by default on Solaris & Linux Swing will not use AA text over
1692 * remote X11 display (unless Xrender can be used which is TBD and may not
1693 * always be available anyway) as that is a noticeable performance hit.
1694 * So there needs to be a way to express that extra condition so that
1695 * it is seen by all clients of the desktop property API.
1696 * If this were the only condition it could be handled here as it would
1697 * be the same for any L&F and could reasonably be considered to be
1698 * a static behaviour of those systems.
1699 * But GTK currently has an additional test based on locale which is
1700 * not applied by Metal. So mixing GTK in a few locales with Metal
1701 * would mean the last one wins.
1702 * This could be stored per-app context which would work
1703 * for different applets, but wouldn't help for a single application
1704 * using GTK and some other L&F concurrently.
1705 * But it is expected this will be addressed within GTK and the font
1706 * system so is a temporary and somewhat unlikely harmless corner case.
1707 */
1708 public static void setAAFontSettingsCondition(boolean extraCondition) {
1709 if (extraCondition != lastExtraCondition) {
1710 lastExtraCondition = extraCondition;
1711 if (checkedSystemAAFontSettings) {
1712 /* Someone already asked for this info, under a different
1713 * condition.
1714 * We'll force re-evaluation instead of replicating the
1715 * logic, then notify any listeners of any change.
1716 */
1717 checkedSystemAAFontSettings = false;
1718 Toolkit tk = Toolkit.getDefaultToolkit();
1719 if (tk instanceof SunToolkit) {
1720 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1721 }
1722 }
1723 }
1724 }
1725
1726 /* "false", "off", ""default" aren't explicitly tested, they
1727 * just fall through to produce a null return which all are equated to
1728 * "false".
1729 */
1730 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1731 Object aaHint = null;
1732 hintname = hintname.toLowerCase(Locale.ENGLISH);
1733 if (hintname.equals("on")) {
1734 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1735 } else if (hintname.equals("gasp")) {
1736 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1737 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1738 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1739 } else if (hintname.equals("lcd_hbgr")) {
1740 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1741 } else if (hintname.equals("lcd_vrgb")) {
1742 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1743 } else if (hintname.equals("lcd_vbgr")) {
1744 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1745 }
1746 if (aaHint != null) {
1747 RenderingHints map = new RenderingHints(null);
1748 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1749 return map;
1750 } else {
1751 return null;
1752 }
1753 }
1754
1755 /* This method determines whether to use the system font settings,
1756 * or ignore them if a L&F has specified they should be ignored, or
1757 * to override both of these with a system property specified value.
1758 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1759 * system property isn't applied as desktop properties are considered
1760 * to be inapplicable in that case. In that headless case although
1761 * this method will return "true" the toolkit will return a null map.
1762 */
1763 private static boolean useSystemAAFontSettings() {
1764 if (!checkedSystemAAFontSettings) {
1765 useSystemAAFontSettings = true; /* initially set this true */
1766 String systemAAFonts = null;
1767 Toolkit tk = Toolkit.getDefaultToolkit();
1768 if (tk instanceof SunToolkit) {
1769 systemAAFonts =
1770 AccessController.doPrivileged(
1771 new GetPropertyAction("awt.useSystemAAFontSettings"));
1772 }
1773 if (systemAAFonts != null) {
1774 useSystemAAFontSettings =
1775 Boolean.valueOf(systemAAFonts).booleanValue();
1776 /* If it is anything other than "true", then it may be
1777 * a hint name , or it may be "off, "default", etc.
1778 */
1779 if (!useSystemAAFontSettings) {
1780 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1781 }
1782 }
1783 /* If its still true, apply the extra condition */
1784 if (useSystemAAFontSettings) {
1785 useSystemAAFontSettings = lastExtraCondition;
1786 }
1787 checkedSystemAAFontSettings = true;
1788 }
1789 return useSystemAAFontSettings;
1790 }
1791
1792 /* A variable defined for the convenience of JDK code */
1793 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1794
1795 /* Overridden by subclasses to return platform/desktop specific values */
1796 protected RenderingHints getDesktopAAHints() {
1797 return null;
1798 }
1799
1800 /* Subclass desktop property loading methods call this which
1801 * in turn calls the appropriate subclass implementation of
1802 * getDesktopAAHints() when system settings are being used.
1803 * Its public rather than protected because subclasses may delegate
1804 * to a helper class.
1805 */
1806 public static RenderingHints getDesktopFontHints() {
1807 if (useSystemAAFontSettings()) {
1808 Toolkit tk = Toolkit.getDefaultToolkit();
1809 if (tk instanceof SunToolkit) {
1810 Object map = ((SunToolkit)tk).getDesktopAAHints();
1811 return (RenderingHints)map;
1812 } else { /* Headless Toolkit */
1813 return null;
1814 }
1815 } else if (desktopFontHints != null) {
1816 /* cloning not necessary as the return value is cloned later, but
1817 * its harmless.
1818 */
1819 return (RenderingHints)(desktopFontHints.clone());
1820 } else {
1821 return null;
1822 }
1823 }
1824
1825
1826 public abstract boolean isDesktopSupported();
1827
1828 /*
1829 * consumeNextKeyTyped() method is not currently used,
1830 * however Swing could use it in the future.
1831 */
1832 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1833 try {
1834 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1835 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1836 getCurrentKeyboardFocusManager(),
1837 keyEvent);
1838 } catch (ClassCastException cce) {
1839 cce.printStackTrace();
1840 }
1841 }
1842
1843 protected static void dumpPeers(final PlatformLogger aLog) {
1844 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1845 }
1846
1847 /**
1848 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1849 * @return Window ancestor of the component or component by itself if it is Window;
1850 * null, if component is not a part of window hierarchy
1851 */
1852 public static Window getContainingWindow(Component comp) {
1853 while (comp != null && !(comp instanceof Window)) {
1854 comp = comp.getParent();
1855 }
1856 return (Window)comp;
1857 }
1858
1859 private static Boolean sunAwtDisableMixing = null;
1860
1861 /**
1862 * Returns the value of "sun.awt.disableMixing" property. Default
1863 * value is {@code false}.
1864 */
1865 public synchronized static boolean getSunAwtDisableMixing() {
1866 if (sunAwtDisableMixing == null) {
1867 sunAwtDisableMixing = AccessController.doPrivileged(
1868 new GetBooleanAction("sun.awt.disableMixing"));
1869 }
1870 return sunAwtDisableMixing.booleanValue();
1871 }
1872
1873 /**
1874 * Returns true if the native GTK libraries are available. The
1875 * default implementation returns false, but UNIXToolkit overrides this
1876 * method to provide a more specific answer.
1877 */
1878 public boolean isNativeGTKAvailable() {
1879 return false;
1880 }
1881
1882 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1883
1884 public synchronized void setWindowDeactivationTime(Window w, long time) {
1885 AppContext ctx = getAppContext(w);
1886 if (ctx == null) {
1887 return;
1888 }
1889 @SuppressWarnings("unchecked")
1890 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1891 if (map == null) {
1892 map = new WeakHashMap<Window, Long>();
1893 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1894 }
1895 map.put(w, time);
1896 }
1897
1898 public synchronized long getWindowDeactivationTime(Window w) {
1899 AppContext ctx = getAppContext(w);
1900 if (ctx == null) {
1901 return -1;
1902 }
1903 @SuppressWarnings("unchecked")
1904 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1905 if (map == null) {
1906 return -1;
1907 }
1908 Long time = map.get(w);
1909 return time == null ? -1 : time;
1910 }
1911
1912 // Cosntant alpha
1913 public boolean isWindowOpacitySupported() {
1914 return false;
1915 }
1916
1917 // Shaping
1918 public boolean isWindowShapingSupported() {
1919 return false;
1920 }
1921
1922 // Per-pixel alpha
1923 public boolean isWindowTranslucencySupported() {
1924 return false;
1925 }
1926
1927 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1928 return false;
1929 }
1930
1931 /**
1932 * Returns true if swing backbuffer should be translucent.
1933 */
1934 public boolean isSwingBackbufferTranslucencySupported() {
1935 return false;
1936 }
1937
1938 /**
1939 * Returns whether or not a containing top level window for the passed
1940 * component is
1941 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1942 *
1943 * @param c a Component which toplevel's to check
1944 * @return {@code true} if the passed component is not null and has a
1945 * containing toplevel window which is opaque (so per-pixel translucency
1946 * is not enabled), {@code false} otherwise
1947 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1948 */
1949 public static boolean isContainingTopLevelOpaque(Component c) {
1950 Window w = getContainingWindow(c);
1951 return w != null && w.isOpaque();
1952 }
1953
1954 /**
1955 * Returns whether or not a containing top level window for the passed
1956 * component is
1957 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1958 *
1959 * @param c a Component which toplevel's to check
1960 * @return {@code true} if the passed component is not null and has a
1961 * containing toplevel window which has opacity less than
1962 * 1.0f (which means that it is translucent), {@code false} otherwise
1963 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1964 */
1965 public static boolean isContainingTopLevelTranslucent(Component c) {
1966 Window w = getContainingWindow(c);
1967 return w != null && w.getOpacity() < 1.0f;
1968 }
1969
1970 /**
1971 * Returns whether the native system requires using the peer.updateWindow()
1972 * method to update the contents of a non-opaque window, or if usual
1973 * painting procedures are sufficient. The default return value covers
1974 * the X11 systems. On MS Windows this method is overriden in WToolkit
1975 * to return true.
1976 */
1977 public boolean needUpdateWindow() {
1978 return false;
1979 }
1980
1981 /**
1982 * Descendants of the SunToolkit should override and put their own logic here.
1983 */
1984 public int getNumberOfButtons(){
1985 return 3;
1986 }
1987
1988 /**
1989 * Checks that the given object implements/extends the given
1990 * interface/class.
1991 *
1992 * Note that using the instanceof operator causes a class to be loaded.
1993 * Using this method doesn't load a class and it can be used instead of
1994 * the instanceof operator for performance reasons.
1995 *
1996 * @param obj Object to be checked
1997 * @param type The name of the interface/class. Must be
1998 * fully-qualified interface/class name.
1999 * @return true, if this object implements/extends the given
2000 * interface/class, false, otherwise, or if obj or type is null
2001 */
2002 public static boolean isInstanceOf(Object obj, String type) {
2003 if (obj == null) return false;
2004 if (type == null) return false;
2005
2006 return isInstanceOf(obj.getClass(), type);
2007 }
2008
2009 private static boolean isInstanceOf(Class<?> cls, String type) {
2010 if (cls == null) return false;
2011
2012 if (cls.getName().equals(type)) {
2013 return true;
2014 }
2015
2016 for (Class<?> c : cls.getInterfaces()) {
2017 if (c.getName().equals(type)) {
2018 return true;
2019 }
2020 }
2021 return isInstanceOf(cls.getSuperclass(), type);
2022 }
2023
2024 protected static LightweightFrame getLightweightFrame(Component c) {
2025 for (; c != null; c = c.getParent()) {
2026 if (c instanceof LightweightFrame) {
2027 return (LightweightFrame)c;
2028 }
2029 if (c instanceof Window) {
2030 // Don't traverse owner windows
2031 return null;
2032 }
2033 }
2034 return null;
2035 }
2036
2037 ///////////////////////////////////////////////////////////////////////////
2038 //
2039 // The following methods help set and identify whether a particular
2040 // AWTEvent object was produced by the system or by user code. As of this
2041 // writing the only consumer is the Java Plug-In, although this information
2042 // could be useful to more clients and probably should be formalized in
2043 // the public API.
2044 //
2045 ///////////////////////////////////////////////////////////////////////////
2046
2047 public static void setSystemGenerated(AWTEvent e) {
2048 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2049 }
2050
2051 public static boolean isSystemGenerated(AWTEvent e) {
2052 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2053 }
2054
2055 } // class SunToolkit
2056
2057
2058 /*
2059 * PostEventQueue is a Thread that runs in the same AppContext as the
2060 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2061 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2062 * events to this queue, which then calls EventQueue.postEvent().
2063 *
2064 * We do this because EventQueue.postEvent() may be overridden by client
2065 * code, and we mustn't ever call client code from the toolkit thread.
2066 */
2067 class PostEventQueue {
2068 private EventQueueItem queueHead = null;
2069 private EventQueueItem queueTail = null;
2070 private final EventQueue eventQueue;
2071
2072 private Thread flushThread = null;
2073
2074 PostEventQueue(EventQueue eq) {
2075 eventQueue = eq;
2076 }
2077
2078 /*
2079 * Continually post pending AWTEvents to the Java EventQueue. The method
2080 * is synchronized to ensure the flush is completed before a new event
2081 * can be posted to this queue.
2082 *
2083 * 7177040: The method couldn't be wholly synchronized because of calls
2084 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2085 * potentially lead to deadlock
2086 */
2087 public void flush() {
2088
2089 Thread newThread = Thread.currentThread();
2090
2091 try {
2092 EventQueueItem tempQueue;
2093 synchronized (this) {
2094 // Avoid method recursion
2095 if (newThread == flushThread) {
2096 return;
2097 }
2098 // Wait for other threads' flushing
2099 while (flushThread != null) {
2100 wait();
2101 }
2102 // Skip everything if queue is empty
2103 if (queueHead == null) {
2104 return;
2105 }
2106 // Remember flushing thread
2107 flushThread = newThread;
2108
2109 tempQueue = queueHead;
2110 queueHead = queueTail = null;
2111 }
2112 try {
2113 while (tempQueue != null) {
2114 eventQueue.postEvent(tempQueue.event);
2115 tempQueue = tempQueue.next;
2116 }
2117 }
2118 finally {
2119 // Only the flushing thread can get here
2120 synchronized (this) {
2121 // Forget flushing thread, inform other pending threads
2122 flushThread = null;
2123 notifyAll();
2124 }
2125 }
2126 }
2127 catch (InterruptedException e) {
2128 // Couldn't allow exception go up, so at least recover the flag
2129 newThread.interrupt();
2130 }
2131 }
2132
2133 /*
2134 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2135 */
2136 void postEvent(AWTEvent event) {
2137 EventQueueItem item = new EventQueueItem(event);
2138
2139 synchronized (this) {
2140 if (queueHead == null) {
2141 queueHead = queueTail = item;
2142 } else {
2143 queueTail.next = item;
2144 queueTail = item;
2145 }
2146 }
2147 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2148 }
2149 } // class PostEventQueue