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