1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.io.File;
40 import java.io.IOException;
41 import java.io.InputStream;
42 import java.net.URL;
43 import java.util.*;
44 import java.util.concurrent.TimeUnit;
45 import java.util.concurrent.locks.Condition;
46 import java.util.concurrent.locks.Lock;
47 import java.util.concurrent.locks.ReentrantLock;
48
49 import sun.security.util.SecurityConstants;
50 import sun.util.logging.PlatformLogger;
51 import sun.misc.SoftCache;
52 import sun.font.FontDesignMetrics;
53 import sun.awt.im.InputContext;
54 import sun.awt.image.*;
55 import sun.security.action.GetPropertyAction;
56 import sun.security.action.GetBooleanAction;
57 import java.lang.reflect.InvocationTargetException;
58 import java.security.AccessController;
59
60 public abstract class SunToolkit extends Toolkit
61 implements WindowClosingSupport, WindowClosingListener,
62 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 || GraphicsEnvironment.isHeadless()) {
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 (!GraphicsEnvironment.isHeadless()) {
462 if (!setAppContext(target, appContext)) {
463 // Target is not a Component/MenuComponent, use the private Map
464 // instead.
465 appContextMap.put(target, appContext);
466 }
467 }
468 }
469
470 /*
471 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
472 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
473 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
474 * not be called under another lock since it locks the EventQueue.
475 * See bugids 4632918, 4526597.
476 */
477 public static void postEvent(AppContext appContext, AWTEvent event) {
478 if (event == null) {
479 throw new NullPointerException();
480 }
481
482 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
483 if (sea != null && sea.isSequencedEvent(event)) {
484 AWTEvent nested = sea.getNested(event);
485 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
486 nested instanceof TimedWindowEvent)
487 {
488 TimedWindowEvent twe = (TimedWindowEvent)nested;
489 ((SunToolkit)Toolkit.getDefaultToolkit()).
490 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
491 }
492 }
493
494 // All events posted via this method are system-generated.
495 // Placing the following call here reduces considerably the
496 // number of places throughout the toolkit that would
497 // otherwise have to be modified to precisely identify
498 // system-generated events.
499 setSystemGenerated(event);
500 AppContext eventContext = targetToAppContext(event.getSource());
501 if (eventContext != null && !eventContext.equals(appContext)) {
502 throw new RuntimeException("Event posted on wrong app context : " + event);
503 }
504 PostEventQueue postEventQueue =
505 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
506 if (postEventQueue != null) {
507 postEventQueue.postEvent(event);
508 }
509 }
510
511 /*
512 * Post AWTEvent of high priority.
513 */
514 public static void postPriorityEvent(final AWTEvent e) {
515 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
516 public void run() {
517 AWTAccessor.getAWTEventAccessor().setPosted(e);
518 ((Component)e.getSource()).dispatchEvent(e);
519 }
520 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
521 postEvent(targetToAppContext(e.getSource()), pe);
522 }
523
524 /*
525 * Flush any pending events which haven't been posted to the AWT
526 * EventQueue yet.
527 */
528 public static void flushPendingEvents() {
529 AppContext appContext = AppContext.getAppContext();
530 flushPendingEvents(appContext);
531 }
532
533 /*
534 * Flush the PostEventQueue for the right AppContext.
535 * The default flushPendingEvents only flushes the thread-local context,
536 * which is not always correct, c.f. 3746956
537 */
538 public static void flushPendingEvents(AppContext appContext) {
539 PostEventQueue postEventQueue =
540 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
541 if (postEventQueue != null) {
542 postEventQueue.flush();
543 }
544 }
545
546 /*
547 * Execute a chunk of code on the Java event handler thread for the
548 * given target. Does not wait for the execution to occur before
549 * returning to the caller.
550 */
551 public static void executeOnEventHandlerThread(Object target,
552 Runnable runnable) {
553 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
554 }
555
556 /*
557 * Fixed 5064013: the InvocationEvent time should be equals
558 * the time of the ActionEvent
559 */
560 @SuppressWarnings("serial")
561 public static void executeOnEventHandlerThread(Object target,
562 Runnable runnable,
563 final long when) {
564 executeOnEventHandlerThread(
565 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
566 public long getWhen() {
567 return when;
568 }
569 });
570 }
571
572 /*
573 * Execute a chunk of code on the Java event handler thread for the
574 * given target. Does not wait for the execution to occur before
575 * returning to the caller.
576 */
577 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
578 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
579 }
580
581 /*
582 * Execute a chunk of code on the Java event handler thread. The
583 * method takes into account provided AppContext and sets
584 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
585 * event. See 6451487 for detailes.
586 * Does not wait for the execution to occur before returning to
587 * the caller.
588 */
589 public static void invokeLaterOnAppContext(
590 AppContext appContext, Runnable dispatcher)
591 {
592 postEvent(appContext,
593 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
594 PeerEvent.PRIORITY_EVENT));
595 }
596
597 /*
598 * Execute a chunk of code on the Java event handler thread for the
599 * given target. Waits for the execution to occur before returning
600 * to the caller.
601 */
602 public static void executeOnEDTAndWait(Object target, Runnable runnable)
603 throws InterruptedException, InvocationTargetException
604 {
605 if (EventQueue.isDispatchThread()) {
606 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
607 }
608
609 class AWTInvocationLock {}
610 Object lock = new AWTInvocationLock();
611
612 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
613
614 synchronized (lock) {
615 executeOnEventHandlerThread(event);
616 while(!event.isDispatched()) {
617 lock.wait();
618 }
619 }
620
621 Throwable eventThrowable = event.getThrowable();
622 if (eventThrowable != null) {
623 throw new InvocationTargetException(eventThrowable);
624 }
625 }
626
627 /*
628 * Returns true if the calling thread is the event dispatch thread
629 * contained within AppContext which associated with the given target.
630 * Use this call to ensure that a given task is being executed
631 * (or not being) on the event dispatch thread for the given target.
632 */
633 public static boolean isDispatchThreadForAppContext(Object target) {
634 AppContext appContext = targetToAppContext(target);
635 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
636
637 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
638 return accessor.isDispatchThreadImpl(eq);
639 }
640
641 public Dimension getScreenSize() {
642 return new Dimension(getScreenWidth(), getScreenHeight());
643 }
644 protected abstract int getScreenWidth();
645 protected abstract int getScreenHeight();
646
647 @SuppressWarnings("deprecation")
648 public FontMetrics getFontMetrics(Font font) {
649 return FontDesignMetrics.getMetrics(font);
650 }
651
652 @SuppressWarnings("deprecation")
653 public String[] getFontList() {
654 String[] hardwiredFontList = {
655 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
656 Font.DIALOG_INPUT
657
658 // -- Obsolete font names from 1.0.2. It was decided that
659 // -- getFontList should not return these old names:
660 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
661 };
662 return hardwiredFontList;
663 }
664
665 public PanelPeer createPanel(Panel target) {
666 return (PanelPeer)createComponent(target);
667 }
668
669 public CanvasPeer createCanvas(Canvas target) {
670 return (CanvasPeer)createComponent(target);
671 }
672
673 /**
674 * Disables erasing of background on the canvas before painting if
675 * this is supported by the current toolkit. It is recommended to
676 * call this method early, before the Canvas becomes displayable,
677 * because some Toolkit implementations do not support changing
678 * this property once the Canvas becomes displayable.
679 */
680 public void disableBackgroundErase(Canvas canvas) {
681 disableBackgroundEraseImpl(canvas);
682 }
683
684 /**
685 * Disables the native erasing of the background on the given
686 * component before painting if this is supported by the current
687 * toolkit. This only has an effect for certain components such as
688 * Canvas, Panel and Window. It is recommended to call this method
689 * early, before the Component becomes displayable, because some
690 * Toolkit implementations do not support changing this property
691 * once the Component becomes displayable.
692 */
693 public void disableBackgroundErase(Component component) {
694 disableBackgroundEraseImpl(component);
695 }
696
697 private void disableBackgroundEraseImpl(Component component) {
698 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
699 }
700
701 /**
702 * Returns the value of "sun.awt.noerasebackground" property. Default
703 * value is {@code false}.
704 */
705 public static boolean getSunAwtNoerasebackground() {
706 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
707 }
708
709 /**
710 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
711 * value is {@code false}.
712 */
713 public static boolean getSunAwtErasebackgroundonresize() {
714 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
715 }
716
717
718 static final SoftCache imgCache = new SoftCache();
719
720 static Image getImageFromHash(Toolkit tk, URL url) {
721 checkPermissions(url);
722 synchronized (imgCache) {
723 Image img = (Image)imgCache.get(url);
724 if (img == null) {
725 try {
726 img = tk.createImage(new URLImageSource(url));
727 imgCache.put(url, img);
728 } catch (Exception e) {
729 }
730 }
731 return img;
732 }
733 }
734
735 static Image getImageFromHash(Toolkit tk,
736 String filename) {
737 checkPermissions(filename);
738 synchronized (imgCache) {
739 Image img = (Image)imgCache.get(filename);
740 if (img == null) {
741 try {
742 img = tk.createImage(new FileImageSource(filename));
743 imgCache.put(filename, img);
744 } catch (Exception e) {
745 }
746 }
747 return img;
748 }
749 }
750
751 public Image getImage(String filename) {
752 return getImageFromHash(this, filename);
753 }
754
755 public Image getImage(URL url) {
756 return getImageFromHash(this, url);
757 }
758
759 protected Image getImageWithResolutionVariant(String fileName,
760 String resolutionVariantName) {
761 synchronized (imgCache) {
762 Image image = getImageFromHash(this, fileName);
763 if (image instanceof MultiResolutionImage) {
764 return image;
765 }
766 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
767 image = createImageWithResolutionVariant(image, resolutionVariant);
768 imgCache.put(fileName, image);
769 return image;
770 }
771 }
772
773 protected Image getImageWithResolutionVariant(URL url,
774 URL resolutionVariantURL) {
775 synchronized (imgCache) {
776 Image image = getImageFromHash(this, url);
777 if (image instanceof MultiResolutionImage) {
778 return image;
779 }
780 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
781 image = createImageWithResolutionVariant(image, resolutionVariant);
782 imgCache.put(url, image);
783 return image;
784 }
785 }
786
787
788 public Image createImage(String filename) {
789 checkPermissions(filename);
790 return createImage(new FileImageSource(filename));
791 }
792
793 public Image createImage(URL url) {
794 checkPermissions(url);
795 return createImage(new URLImageSource(url));
796 }
797
798 public Image createImage(byte[] data, int offset, int length) {
799 return createImage(new ByteArrayImageSource(data, offset, length));
800 }
801
802 public Image createImage(ImageProducer producer) {
803 return new ToolkitImage(producer);
804 }
805
806 public static Image createImageWithResolutionVariant(Image image,
807 Image resolutionVariant) {
808 return new MultiResolutionToolkitImage(image, resolutionVariant);
809 }
810
811 public int checkImage(Image img, int w, int h, ImageObserver o) {
812 if (!(img instanceof ToolkitImage)) {
813 return ImageObserver.ALLBITS;
814 }
815
816 ToolkitImage tkimg = (ToolkitImage)img;
817 int repbits;
818 if (w == 0 || h == 0) {
819 repbits = ImageObserver.ALLBITS;
820 } else {
821 repbits = tkimg.getImageRep().check(o);
822 }
823 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
824 }
825
826 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
827 if (w == 0 || h == 0) {
828 return true;
829 }
830
831 // Must be a ToolkitImage
832 if (!(img instanceof ToolkitImage)) {
833 return true;
834 }
835
836 ToolkitImage tkimg = (ToolkitImage)img;
837 if (tkimg.hasError()) {
838 if (o != null) {
839 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
840 -1, -1, -1, -1);
841 }
842 return false;
843 }
844 ImageRepresentation ir = tkimg.getImageRep();
845 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
846 }
847
848 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
849 ToolkitImage rvImage = getResolutionVariant(img);
850 // Ignore the resolution variant in case of error
851 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
852 checkImage(rvImage, 2 * w, 2 * h, MultiResolutionToolkitImage.
853 getResolutionVariantObserver(
854 img, o, w, h, 2 * w, 2 * h));
855 }
856
857 private boolean prepareResolutionVariant(Image img, int w, int h,
858 ImageObserver o) {
859
860 ToolkitImage rvImage = getResolutionVariant(img);
861 // Ignore the resolution variant in case of error
862 return rvImage == null || rvImage.hasError() || prepareImage(
863 rvImage, 2 * w, 2 * h,
864 MultiResolutionToolkitImage.getResolutionVariantObserver(
865 img, o, w, h, 2 * w, 2 * h));
866 }
867
868 private static ToolkitImage getResolutionVariant(Image image) {
869 if (image instanceof MultiResolutionToolkitImage) {
870 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
871 getResolutionVariant();
872 if (resolutionVariant instanceof ToolkitImage) {
873 return (ToolkitImage) resolutionVariant;
874 }
875 }
876 return null;
877 }
878
879 protected static boolean imageCached(Object key) {
880 return imgCache.containsKey(key);
881 }
882
883 protected static boolean imageExists(String filename) {
884 checkPermissions(filename);
885 return filename != null && new File(filename).exists();
886 }
887
888 @SuppressWarnings("try")
889 protected static boolean imageExists(URL url) {
890 checkPermissions(url);
891 if (url != null) {
892 try (InputStream is = url.openStream()) {
893 return true;
894 }catch(IOException e){
895 return false;
896 }
897 }
898 return false;
899 }
900
901 private static void checkPermissions(String filename) {
902 SecurityManager security = System.getSecurityManager();
903 if (security != null) {
904 security.checkRead(filename);
905 }
906 }
907
908 private static void checkPermissions(URL url) {
909 SecurityManager sm = System.getSecurityManager();
910 if (sm != null) {
911 try {
912 java.security.Permission perm =
913 url.openConnection().getPermission();
914 if (perm != null) {
915 try {
916 sm.checkPermission(perm);
917 } catch (SecurityException se) {
918 // fallback to checkRead/checkConnect for pre 1.2
919 // security managers
920 if ((perm instanceof java.io.FilePermission) &&
921 perm.getActions().indexOf("read") != -1) {
922 sm.checkRead(perm.getName());
923 } else if ((perm instanceof
924 java.net.SocketPermission) &&
925 perm.getActions().indexOf("connect") != -1) {
926 sm.checkConnect(url.getHost(), url.getPort());
927 } else {
928 throw se;
929 }
930 }
931 }
932 } catch (java.io.IOException ioe) {
933 sm.checkConnect(url.getHost(), url.getPort());
934 }
935 }
936 }
937
938 /**
939 * Scans {@code imageList} for best-looking image of specified dimensions.
940 * Image can be scaled and/or padded with transparency.
941 */
942 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
943 if (width == 0 || height == 0) {
944 return null;
945 }
946 Image bestImage = null;
947 int bestWidth = 0;
948 int bestHeight = 0;
949 double bestSimilarity = 3; //Impossibly high value
950 double bestScaleFactor = 0;
951 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
952 //Iterate imageList looking for best matching image.
953 //'Similarity' measure is defined as good scale factor and small insets.
954 //best possible similarity is 0 (no scale, no insets).
955 //It's found while the experiments that good-looking result is achieved
956 //with scale factors x1, x3/4, x2/3, xN, x1/N.
957 Image im = i.next();
958 if (im == null) {
959 continue;
960 }
961 if (im instanceof ToolkitImage) {
962 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
963 ir.reconstruct(ImageObserver.ALLBITS);
964 }
965 int iw;
966 int ih;
967 try {
968 iw = im.getWidth(null);
969 ih = im.getHeight(null);
970 } catch (Exception e){
971 continue;
972 }
973 if (iw > 0 && ih > 0) {
974 //Calc scale factor
975 double scaleFactor = Math.min((double)width / (double)iw,
976 (double)height / (double)ih);
977 //Calculate scaled image dimensions
978 //adjusting scale factor to nearest "good" value
979 int adjw = 0;
980 int adjh = 0;
981 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
982 if (scaleFactor >= 2) {
983 //Need to enlarge image more than twice
984 //Round down scale factor to multiply by integer value
985 scaleFactor = Math.floor(scaleFactor);
986 adjw = iw * (int)scaleFactor;
987 adjh = ih * (int)scaleFactor;
988 scaleMeasure = 1.0 - 0.5 / scaleFactor;
989 } else if (scaleFactor >= 1) {
990 //Don't scale
991 scaleFactor = 1.0;
992 adjw = iw;
993 adjh = ih;
994 scaleMeasure = 0;
995 } else if (scaleFactor >= 0.75) {
996 //Multiply by 3/4
997 scaleFactor = 0.75;
998 adjw = iw * 3 / 4;
999 adjh = ih * 3 / 4;
1000 scaleMeasure = 0.3;
1001 } else if (scaleFactor >= 0.6666) {
1002 //Multiply by 2/3
1003 scaleFactor = 0.6666;
1004 adjw = iw * 2 / 3;
1005 adjh = ih * 2 / 3;
1006 scaleMeasure = 0.33;
1007 } else {
1008 //Multiply size by 1/scaleDivider
1009 //where scaleDivider is minimum possible integer
1010 //larger than 1/scaleFactor
1011 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1012 scaleFactor = 1.0 / scaleDivider;
1013 adjw = (int)Math.round((double)iw / scaleDivider);
1014 adjh = (int)Math.round((double)ih / scaleDivider);
1015 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1016 }
1017 double similarity = ((double)width - (double)adjw) / (double)width +
1018 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1019 scaleMeasure; //Large rescale is bad
1020 if (similarity < bestSimilarity) {
1021 bestSimilarity = similarity;
1022 bestScaleFactor = scaleFactor;
1023 bestImage = im;
1024 bestWidth = adjw;
1025 bestHeight = adjh;
1026 }
1027 if (similarity == 0) break;
1028 }
1029 }
1030 if (bestImage == null) {
1031 //No images were found, possibly all are broken
1032 return null;
1033 }
1034 BufferedImage bimage =
1035 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1036 Graphics2D g = bimage.createGraphics();
1037 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1038 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1039 try {
1040 int x = (width - bestWidth) / 2;
1041 int y = (height - bestHeight) / 2;
1042 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1043 } finally {
1044 g.dispose();
1045 }
1046 return bimage;
1047 }
1048
1049 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1050 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1051 if (bimage == null) {
1052 return null;
1053 }
1054 Raster raster = bimage.getRaster();
1055 DataBuffer buffer = raster.getDataBuffer();
1056 return (DataBufferInt)buffer;
1057 }
1058
1059 protected EventQueue getSystemEventQueueImpl() {
1060 return getSystemEventQueueImplPP();
1061 }
1062
1063 // Package private implementation
1064 static EventQueue getSystemEventQueueImplPP() {
1065 return getSystemEventQueueImplPP(AppContext.getAppContext());
1066 }
1067
1068 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1069 EventQueue theEventQueue =
1070 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1071 return theEventQueue;
1072 }
1073
1074 /**
1075 * Give native peers the ability to query the native container
1076 * given a native component (eg the direct parent may be lightweight).
1077 */
1078 public static Container getNativeContainer(Component c) {
1079 return Toolkit.getNativeContainer(c);
1080 }
1081
1082 /**
1083 * Gives native peers the ability to query the closest HW component.
1084 * If the given component is heavyweight, then it returns this. Otherwise,
1085 * it goes one level up in the hierarchy and tests next component.
1086 */
1087 public static Component getHeavyweightComponent(Component c) {
1088 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1089 c = AWTAccessor.getComponentAccessor().getParent(c);
1090 }
1091 return c;
1092 }
1093
1094 /**
1095 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1096 */
1097 public int getFocusAcceleratorKeyMask() {
1098 return InputEvent.ALT_MASK;
1099 }
1100
1101 /**
1102 * Tests whether specified key modifiers mask can be used to enter a printable
1103 * character. This is a default implementation of this method, which reflects
1104 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1105 * characters from the extended character set (like euro sign or math symbols)
1106 */
1107 public boolean isPrintableCharacterModifiersMask(int mods) {
1108 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1109 }
1110
1111 /**
1112 * Returns whether popup is allowed to be shown above the task bar.
1113 * This is a default implementation of this method, which checks
1114 * corresponding security permission.
1115 */
1116 public boolean canPopupOverlapTaskBar() {
1117 boolean result = true;
1118 try {
1119 SecurityManager sm = System.getSecurityManager();
1120 if (sm != null) {
1121 sm.checkPermission(
1122 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1123 }
1124 } catch (SecurityException se) {
1125 // There is no permission to show popups over the task bar
1126 result = false;
1127 }
1128 return result;
1129 }
1130
1131 /**
1132 * Returns a new input method window, with behavior as specified in
1133 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1134 * If the inputContext is not null, the window should return it from its
1135 * getInputContext() method. The window needs to implement
1136 * sun.awt.im.InputMethodWindow.
1137 * <p>
1138 * SunToolkit subclasses can override this method to return better input
1139 * method windows.
1140 */
1141 public Window createInputMethodWindow(String title, InputContext context) {
1142 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1143 }
1144
1145 /**
1146 * Returns whether enableInputMethods should be set to true for peered
1147 * TextComponent instances on this platform. False by default.
1148 */
1149 public boolean enableInputMethodsForTextComponent() {
1150 return false;
1151 }
1152
1153 private static Locale startupLocale = null;
1154
1155 /**
1156 * Returns the locale in which the runtime was started.
1157 */
1158 public static Locale getStartupLocale() {
1159 if (startupLocale == null) {
1160 String language, region, country, variant;
1161 language = AccessController.doPrivileged(
1162 new GetPropertyAction("user.language", "en"));
1163 // for compatibility, check for old user.region property
1164 region = AccessController.doPrivileged(
1165 new GetPropertyAction("user.region"));
1166 if (region != null) {
1167 // region can be of form country, country_variant, or _variant
1168 int i = region.indexOf('_');
1169 if (i >= 0) {
1170 country = region.substring(0, i);
1171 variant = region.substring(i + 1);
1172 } else {
1173 country = region;
1174 variant = "";
1175 }
1176 } else {
1177 country = AccessController.doPrivileged(
1178 new GetPropertyAction("user.country", ""));
1179 variant = AccessController.doPrivileged(
1180 new GetPropertyAction("user.variant", ""));
1181 }
1182 startupLocale = new Locale(language, country, variant);
1183 }
1184 return startupLocale;
1185 }
1186
1187 /**
1188 * Returns the default keyboard locale of the underlying operating system
1189 */
1190 public Locale getDefaultKeyboardLocale() {
1191 return getStartupLocale();
1192 }
1193
1194 private static String dataTransfererClassName = null;
1195
1196 protected static void setDataTransfererClassName(String className) {
1197 dataTransfererClassName = className;
1198 }
1199
1200 public static String getDataTransfererClassName() {
1201 if (dataTransfererClassName == null) {
1202 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1203 }
1204 return dataTransfererClassName;
1205 }
1206
1207 // Support for window closing event notifications
1208 private transient WindowClosingListener windowClosingListener = null;
1209 /**
1210 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1211 */
1212 public WindowClosingListener getWindowClosingListener() {
1213 return windowClosingListener;
1214 }
1215 /**
1216 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1217 */
1218 public void setWindowClosingListener(WindowClosingListener wcl) {
1219 windowClosingListener = wcl;
1220 }
1221
1222 /**
1223 * @see sun.awt.WindowClosingListener#windowClosingNotify
1224 */
1225 public RuntimeException windowClosingNotify(WindowEvent event) {
1226 if (windowClosingListener != null) {
1227 return windowClosingListener.windowClosingNotify(event);
1228 } else {
1229 return null;
1230 }
1231 }
1232 /**
1233 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1234 */
1235 public RuntimeException windowClosingDelivered(WindowEvent event) {
1236 if (windowClosingListener != null) {
1237 return windowClosingListener.windowClosingDelivered(event);
1238 } else {
1239 return null;
1240 }
1241 }
1242
1243 private static DefaultMouseInfoPeer mPeer = null;
1244
1245 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1246 if (mPeer == null) {
1247 mPeer = new DefaultMouseInfoPeer();
1248 }
1249 return mPeer;
1250 }
1251
1252
1253 /**
1254 * Returns whether default toolkit needs the support of the xembed
1255 * from embedding host(if any).
1256 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1257 */
1258 public static boolean needsXEmbed() {
1259 String noxembed = AccessController.
1260 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1261 if ("true".equals(noxembed)) {
1262 return false;
1263 }
1264
1265 Toolkit tk = Toolkit.getDefaultToolkit();
1266 if (tk instanceof SunToolkit) {
1267 // SunToolkit descendants should override this method to specify
1268 // concrete behavior
1269 return ((SunToolkit)tk).needsXEmbedImpl();
1270 } else {
1271 // Non-SunToolkit doubtly might support XEmbed
1272 return false;
1273 }
1274 }
1275
1276 /**
1277 * Returns whether this toolkit needs the support of the xembed
1278 * from embedding host(if any).
1279 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1280 */
1281 protected boolean needsXEmbedImpl() {
1282 return false;
1283 }
1284
1285 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1286
1287 /**
1288 * Returns whether the XEmbed server feature is requested by
1289 * developer. If true, Toolkit should return an
1290 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1291 */
1292 protected final boolean isXEmbedServerRequested() {
1293 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1294 }
1295
1296 /**
1297 * Returns whether the modal exclusion API is supported by the current toolkit.
1298 * When it isn't supported, calling <code>setModalExcluded</code> has no
1299 * effect, and <code>isModalExcluded</code> returns false for all windows.
1300 *
1301 * @return true if modal exclusion is supported by the toolkit, false otherwise
1302 *
1303 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1304 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1305 *
1306 * @since 1.5
1307 */
1308 public static boolean isModalExcludedSupported()
1309 {
1310 Toolkit tk = Toolkit.getDefaultToolkit();
1311 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1312 }
1313 /*
1314 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1315 *
1316 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1317 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1318 *
1319 * @since 1.5
1320 */
1321 protected boolean isModalExcludedSupportedImpl()
1322 {
1323 return false;
1324 }
1325
1326 /*
1327 * Sets this window to be excluded from being modally blocked. When the
1328 * toolkit supports modal exclusion and this method is called, input
1329 * events, focus transfer and z-order will continue to work for the
1330 * window, it's owned windows and child components, even in the
1331 * presence of a modal dialog.
1332 * For details on which <code>Window</code>s are normally blocked
1333 * by modal dialog, see {@link java.awt.Dialog}.
1334 * Invoking this method when the modal exclusion API is not supported by
1335 * the current toolkit has no effect.
1336 * @param window Window to be marked as not modally blocked
1337 * @see java.awt.Dialog
1338 * @see java.awt.Dialog#setModal(boolean)
1339 * @see sun.awt.SunToolkit#isModalExcludedSupported
1340 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1341 */
1342 public static void setModalExcluded(Window window)
1343 {
1344 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1345 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1346 }
1347 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1348 }
1349
1350 /*
1351 * Returns whether the specified window is blocked by modal dialogs.
1352 * If the modal exclusion API isn't supported by the current toolkit,
1353 * it returns false for all windows.
1354 *
1355 * @param window Window to test for modal exclusion
1356 *
1357 * @return true if the window is modal excluded, false otherwise. If
1358 * the modal exclusion isn't supported by the current Toolkit, false
1359 * is returned
1360 *
1361 * @see sun.awt.SunToolkit#isModalExcludedSupported
1362 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1363 *
1364 * @since 1.5
1365 */
1366 public static boolean isModalExcluded(Window window)
1367 {
1368 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1369 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1370 }
1371 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1372 }
1373
1374 /**
1375 * Overridden in XToolkit and WToolkit
1376 */
1377 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1378 return (modalityType == Dialog.ModalityType.MODELESS) ||
1379 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1380 }
1381
1382 /**
1383 * Overridden in XToolkit and WToolkit
1384 */
1385 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1386 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1387 }
1388
1389 ///////////////////////////////////////////////////////////////////////////
1390 //
1391 // The following is used by the Java Plug-in to coordinate dialog modality
1392 // between containing applications (browsers, ActiveX containers etc) and
1393 // the AWT.
1394 //
1395 ///////////////////////////////////////////////////////////////////////////
1396
1397 private ModalityListenerList modalityListeners = new ModalityListenerList();
1398
1399 public void addModalityListener(ModalityListener listener) {
1400 modalityListeners.add(listener);
1401 }
1402
1403 public void removeModalityListener(ModalityListener listener) {
1404 modalityListeners.remove(listener);
1405 }
1406
1407 public void notifyModalityPushed(Dialog dialog) {
1408 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1409 }
1410
1411 public void notifyModalityPopped(Dialog dialog) {
1412 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1413 }
1414
1415 final void notifyModalityChange(int id, Dialog source) {
1416 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1417 ev.dispatch();
1418 }
1419
1420 static class ModalityListenerList implements ModalityListener {
1421
1422 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1423
1424 void add(ModalityListener listener) {
1425 listeners.addElement(listener);
1426 }
1427
1428 void remove(ModalityListener listener) {
1429 listeners.removeElement(listener);
1430 }
1431
1432 public void modalityPushed(ModalityEvent ev) {
1433 Iterator<ModalityListener> it = listeners.iterator();
1434 while (it.hasNext()) {
1435 it.next().modalityPushed(ev);
1436 }
1437 }
1438
1439 public void modalityPopped(ModalityEvent ev) {
1440 Iterator<ModalityListener> it = listeners.iterator();
1441 while (it.hasNext()) {
1442 it.next().modalityPopped(ev);
1443 }
1444 }
1445 } // end of class ModalityListenerList
1446
1447 ///////////////////////////////////////////////////////////////////////////
1448 // End Plug-in code
1449 ///////////////////////////////////////////////////////////////////////////
1450
1451 public static boolean isLightweightOrUnknown(Component comp) {
1452 if (comp.isLightweight()
1453 || !(getDefaultToolkit() instanceof SunToolkit))
1454 {
1455 return true;
1456 }
1457 return !(comp instanceof Button
1458 || comp instanceof Canvas
1459 || comp instanceof Checkbox
1460 || comp instanceof Choice
1461 || comp instanceof Label
1462 || comp instanceof java.awt.List
1463 || comp instanceof Panel
1464 || comp instanceof Scrollbar
1465 || comp instanceof ScrollPane
1466 || comp instanceof TextArea
1467 || comp instanceof TextField
1468 || comp instanceof Window);
1469 }
1470
1471 @SuppressWarnings("serial")
1472 public static class OperationTimedOut extends RuntimeException {
1473 public OperationTimedOut(String msg) {
1474 super(msg);
1475 }
1476 public OperationTimedOut() {
1477 }
1478 }
1479
1480 @SuppressWarnings("serial")
1481 public static class InfiniteLoop extends RuntimeException {
1482 }
1483
1484 @SuppressWarnings("serial")
1485 public static class IllegalThreadException extends RuntimeException {
1486 public IllegalThreadException(String msg) {
1487 super(msg);
1488 }
1489 public IllegalThreadException() {
1490 }
1491 }
1492
1493 public static final int DEFAULT_WAIT_TIME = 10000;
1494 private static final int MAX_ITERS = 20;
1495 private static final int MIN_ITERS = 0;
1496 private static final int MINIMAL_EDELAY = 0;
1497
1498 /**
1499 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1500 */
1501 public void realSync() throws OperationTimedOut, InfiniteLoop {
1502 realSync(DEFAULT_WAIT_TIME);
1503 }
1504
1505 /**
1506 * Forces toolkit to synchronize with the native windowing
1507 * sub-system, flushing all pending work and waiting for all the
1508 * events to be processed. This method guarantees that after
1509 * return no additional Java events will be generated, unless
1510 * cause by user. Obviously, the method cannot be used on the
1511 * event dispatch thread (EDT). In case it nevertheless gets
1512 * invoked on this thread, the method throws the
1513 * IllegalThreadException runtime exception.
1514 *
1515 * <p> This method allows to write tests without explicit timeouts
1516 * or wait for some event. Example:
1517 * <code>
1518 * Frame f = ...;
1519 * f.setVisible(true);
1520 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1521 * </code>
1522 *
1523 * <p> After realSync, <code>f</code> will be completely visible
1524 * on the screen, its getLocationOnScreen will be returning the
1525 * right result and it will be the focus owner.
1526 *
1527 * <p> Another example:
1528 * <code>
1529 * b.requestFocus();
1530 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1531 * </code>
1532 *
1533 * <p> After realSync, <code>b</code> will be focus owner.
1534 *
1535 * <p> Notice that realSync isn't guaranteed to work if recurring
1536 * actions occur, such as if during processing of some event
1537 * another request which may generate some events occurs. By
1538 * default, sync tries to perform as much as {@value MAX_ITERS}
1539 * cycles of event processing, allowing for roughly {@value
1540 * MAX_ITERS} additional requests.
1541 *
1542 * <p> For example, requestFocus() generates native request, which
1543 * generates one or two Java focus events, which then generate a
1544 * serie of paint events, a serie of Java focus events, which then
1545 * generate a serie of paint events which then are processed -
1546 * three cycles, minimum.
1547 *
1548 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1549 */
1550 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1551 {
1552 if (EventQueue.isDispatchThread()) {
1553 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1554 }
1555 int bigLoop = 0;
1556 do {
1557 // Let's do sync first
1558 sync();
1559
1560 // During the wait process, when we were processing incoming
1561 // events, we could have made some new request, which can
1562 // generate new events. Example: MapNotify/XSetInputFocus.
1563 // Therefore, we dispatch them as long as there is something
1564 // to dispatch.
1565 int iters = 0;
1566 while (iters < MIN_ITERS) {
1567 syncNativeQueue(timeout);
1568 iters++;
1569 }
1570 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1571 iters++;
1572 }
1573 if (iters >= MAX_ITERS) {
1574 throw new InfiniteLoop();
1575 }
1576
1577 // native requests were dispatched by X/Window Manager or Windows
1578 // Moreover, we processed them all on Toolkit thread
1579 // Now wait while EDT processes them.
1580 //
1581 // During processing of some events (focus, for example),
1582 // some other events could have been generated. So, after
1583 // waitForIdle, we may end up with full EventQueue
1584 iters = 0;
1585 while (iters < MIN_ITERS) {
1586 waitForIdle(timeout);
1587 iters++;
1588 }
1589 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1590 iters++;
1591 }
1592 if (iters >= MAX_ITERS) {
1593 throw new InfiniteLoop();
1594 }
1595
1596 bigLoop++;
1597 // Again, for Java events, it was simple to check for new Java
1598 // events by checking event queue, but what if Java events
1599 // resulted in native requests? Therefor, check native events again.
1600 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1601 }
1602
1603 /**
1604 * Platform toolkits need to implement this method to perform the
1605 * sync of the native queue. The method should wait until native
1606 * requests are processed, all native events are processed and
1607 * corresponding Java events are generated. Should return
1608 * <code>true</code> if some events were processed,
1609 * <code>false</code> otherwise.
1610 */
1611 protected abstract boolean syncNativeQueue(final long timeout);
1612
1613 private boolean eventDispatched = false;
1614 private boolean queueEmpty = false;
1615 private final Object waitLock = "Wait Lock";
1616
1617 private boolean isEQEmpty() {
1618 EventQueue queue = getSystemEventQueueImpl();
1619 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1620 }
1621
1622 /**
1623 * Waits for the Java event queue to empty. Ensures that all
1624 * events are processed (including paint events), and that if
1625 * recursive events were generated, they are also processed.
1626 * Should return <code>true</code> if more processing is
1627 * necessary, <code>false</code> otherwise.
1628 */
1629 @SuppressWarnings("serial")
1630 protected final boolean waitForIdle(final long timeout) {
1631 flushPendingEvents();
1632 boolean queueWasEmpty = isEQEmpty();
1633 queueEmpty = false;
1634 eventDispatched = false;
1635 synchronized(waitLock) {
1636 postEvent(AppContext.getAppContext(),
1637 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1638 public void dispatch() {
1639 // Here we block EDT. It could have some
1640 // events, it should have dispatched them by
1641 // now. So native requests could have been
1642 // generated. First, dispatch them. Then,
1643 // flush Java events again.
1644 int iters = 0;
1645 while (iters < MIN_ITERS) {
1646 syncNativeQueue(timeout);
1647 iters++;
1648 }
1649 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1650 iters++;
1651 }
1652 flushPendingEvents();
1653
1654 synchronized(waitLock) {
1655 queueEmpty = isEQEmpty();
1656 eventDispatched = true;
1657 waitLock.notifyAll();
1658 }
1659 }
1660 });
1661 try {
1662 while (!eventDispatched) {
1663 waitLock.wait();
1664 }
1665 } catch (InterruptedException ie) {
1666 return false;
1667 }
1668 }
1669
1670 try {
1671 Thread.sleep(MINIMAL_EDELAY);
1672 } catch (InterruptedException ie) {
1673 throw new RuntimeException("Interrupted");
1674 }
1675
1676 flushPendingEvents();
1677
1678 // Lock to force write-cache flush for queueEmpty.
1679 synchronized (waitLock) {
1680 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1681 }
1682 }
1683
1684 /**
1685 * Grabs the mouse input for the given window. The window must be
1686 * visible. The window or its children do not receive any
1687 * additional mouse events besides those targeted to them. All
1688 * other events will be dispatched as before - to the respective
1689 * targets. This Window will receive UngrabEvent when automatic
1690 * ungrab is about to happen. The event can be listened to by
1691 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1692 * UngrabEvent class for the list of conditions when ungrab is
1693 * about to happen.
1694 * @see UngrabEvent
1695 */
1696 public abstract void grab(Window w);
1697
1698 /**
1699 * Forces ungrab. No event will be sent.
1700 */
1701 public abstract void ungrab(Window w);
1702
1703
1704 /**
1705 * Locates the splash screen library in a platform dependent way and closes
1706 * the splash screen. Should be invoked on first top-level frame display.
1707 * @see java.awt.SplashScreen
1708 * @since 1.6
1709 */
1710 public static native void closeSplashScreen();
1711
1712 /* The following methods and variables are to support retrieving
1713 * desktop text anti-aliasing settings
1714 */
1715
1716 /* Need an instance method because setDesktopProperty(..) is protected. */
1717 private void fireDesktopFontPropertyChanges() {
1718 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1719 SunToolkit.getDesktopFontHints());
1720 }
1721
1722 private static boolean checkedSystemAAFontSettings;
1723 private static boolean useSystemAAFontSettings;
1724 private static boolean lastExtraCondition = true;
1725 private static RenderingHints desktopFontHints;
1726
1727 /* Since Swing is the reason for this "extra condition" logic its
1728 * worth documenting it in some detail.
1729 * First, a goal is for Swing and applications to both retrieve and
1730 * use the same desktop property value so that there is complete
1731 * consistency between the settings used by JDK's Swing implementation
1732 * and 3rd party custom Swing components, custom L&Fs and any general
1733 * text rendering that wants to be consistent with these.
1734 * But by default on Solaris & Linux Swing will not use AA text over
1735 * remote X11 display (unless Xrender can be used which is TBD and may not
1736 * always be available anyway) as that is a noticeable performance hit.
1737 * So there needs to be a way to express that extra condition so that
1738 * it is seen by all clients of the desktop property API.
1739 * If this were the only condition it could be handled here as it would
1740 * be the same for any L&F and could reasonably be considered to be
1741 * a static behaviour of those systems.
1742 * But GTK currently has an additional test based on locale which is
1743 * not applied by Metal. So mixing GTK in a few locales with Metal
1744 * would mean the last one wins.
1745 * This could be stored per-app context which would work
1746 * for different applets, but wouldn't help for a single application
1747 * using GTK and some other L&F concurrently.
1748 * But it is expected this will be addressed within GTK and the font
1749 * system so is a temporary and somewhat unlikely harmless corner case.
1750 */
1751 public static void setAAFontSettingsCondition(boolean extraCondition) {
1752 if (extraCondition != lastExtraCondition) {
1753 lastExtraCondition = extraCondition;
1754 if (checkedSystemAAFontSettings) {
1755 /* Someone already asked for this info, under a different
1756 * condition.
1757 * We'll force re-evaluation instead of replicating the
1758 * logic, then notify any listeners of any change.
1759 */
1760 checkedSystemAAFontSettings = false;
1761 Toolkit tk = Toolkit.getDefaultToolkit();
1762 if (tk instanceof SunToolkit) {
1763 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1764 }
1765 }
1766 }
1767 }
1768
1769 /* "false", "off", ""default" aren't explicitly tested, they
1770 * just fall through to produce a null return which all are equated to
1771 * "false".
1772 */
1773 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1774 Object aaHint = null;
1775 hintname = hintname.toLowerCase(Locale.ENGLISH);
1776 if (hintname.equals("on")) {
1777 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1778 } else if (hintname.equals("gasp")) {
1779 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1780 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1781 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1782 } else if (hintname.equals("lcd_hbgr")) {
1783 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1784 } else if (hintname.equals("lcd_vrgb")) {
1785 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1786 } else if (hintname.equals("lcd_vbgr")) {
1787 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1788 }
1789 if (aaHint != null) {
1790 RenderingHints map = new RenderingHints(null);
1791 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1792 return map;
1793 } else {
1794 return null;
1795 }
1796 }
1797
1798 /* This method determines whether to use the system font settings,
1799 * or ignore them if a L&F has specified they should be ignored, or
1800 * to override both of these with a system property specified value.
1801 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1802 * system property isn't applied as desktop properties are considered
1803 * to be inapplicable in that case. In that headless case although
1804 * this method will return "true" the toolkit will return a null map.
1805 */
1806 private static boolean useSystemAAFontSettings() {
1807 if (!checkedSystemAAFontSettings) {
1808 useSystemAAFontSettings = true; /* initially set this true */
1809 String systemAAFonts = null;
1810 Toolkit tk = Toolkit.getDefaultToolkit();
1811 if (tk instanceof SunToolkit) {
1812 systemAAFonts =
1813 AccessController.doPrivileged(
1814 new GetPropertyAction("awt.useSystemAAFontSettings"));
1815 }
1816 if (systemAAFonts != null) {
1817 useSystemAAFontSettings =
1818 Boolean.valueOf(systemAAFonts).booleanValue();
1819 /* If it is anything other than "true", then it may be
1820 * a hint name , or it may be "off, "default", etc.
1821 */
1822 if (!useSystemAAFontSettings) {
1823 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1824 }
1825 }
1826 /* If its still true, apply the extra condition */
1827 if (useSystemAAFontSettings) {
1828 useSystemAAFontSettings = lastExtraCondition;
1829 }
1830 checkedSystemAAFontSettings = true;
1831 }
1832 return useSystemAAFontSettings;
1833 }
1834
1835 /* A variable defined for the convenience of JDK code */
1836 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1837
1838 /* Overridden by subclasses to return platform/desktop specific values */
1839 protected RenderingHints getDesktopAAHints() {
1840 return null;
1841 }
1842
1843 /* Subclass desktop property loading methods call this which
1844 * in turn calls the appropriate subclass implementation of
1845 * getDesktopAAHints() when system settings are being used.
1846 * Its public rather than protected because subclasses may delegate
1847 * to a helper class.
1848 */
1849 public static RenderingHints getDesktopFontHints() {
1850 if (useSystemAAFontSettings()) {
1851 Toolkit tk = Toolkit.getDefaultToolkit();
1852 if (tk instanceof SunToolkit) {
1853 Object map = ((SunToolkit)tk).getDesktopAAHints();
1854 return (RenderingHints)map;
1855 } else { /* Headless Toolkit */
1856 return null;
1857 }
1858 } else if (desktopFontHints != null) {
1859 /* cloning not necessary as the return value is cloned later, but
1860 * its harmless.
1861 */
1862 return (RenderingHints)(desktopFontHints.clone());
1863 } else {
1864 return null;
1865 }
1866 }
1867
1868
1869 public abstract boolean isDesktopSupported();
1870
1871 /*
1872 * consumeNextKeyTyped() method is not currently used,
1873 * however Swing could use it in the future.
1874 */
1875 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1876 try {
1877 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1878 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1879 getCurrentKeyboardFocusManager(),
1880 keyEvent);
1881 } catch (ClassCastException cce) {
1882 cce.printStackTrace();
1883 }
1884 }
1885
1886 protected static void dumpPeers(final PlatformLogger aLog) {
1887 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1888 }
1889
1890 /**
1891 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1892 * @return Window ancestor of the component or component by itself if it is Window;
1893 * null, if component is not a part of window hierarchy
1894 */
1895 public static Window getContainingWindow(Component comp) {
1896 while (comp != null && !(comp instanceof Window)) {
1897 comp = comp.getParent();
1898 }
1899 return (Window)comp;
1900 }
1901
1902 private static Boolean sunAwtDisableMixing = null;
1903
1904 /**
1905 * Returns the value of "sun.awt.disableMixing" property. Default
1906 * value is {@code false}.
1907 */
1908 public synchronized static boolean getSunAwtDisableMixing() {
1909 if (sunAwtDisableMixing == null) {
1910 sunAwtDisableMixing = AccessController.doPrivileged(
1911 new GetBooleanAction("sun.awt.disableMixing"));
1912 }
1913 return sunAwtDisableMixing.booleanValue();
1914 }
1915
1916 /**
1917 * Returns true if the native GTK libraries are available. The
1918 * default implementation returns false, but UNIXToolkit overrides this
1919 * method to provide a more specific answer.
1920 */
1921 public boolean isNativeGTKAvailable() {
1922 return false;
1923 }
1924
1925 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1926
1927 public synchronized void setWindowDeactivationTime(Window w, long time) {
1928 AppContext ctx = getAppContext(w);
1929 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1930 if (map == null) {
1931 map = new WeakHashMap<Window, Long>();
1932 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1933 }
1934 map.put(w, time);
1935 }
1936
1937 public synchronized long getWindowDeactivationTime(Window w) {
1938 AppContext ctx = getAppContext(w);
1939 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1940 if (map == null) {
1941 return -1;
1942 }
1943 Long time = map.get(w);
1944 return time == null ? -1 : time;
1945 }
1946
1947 // Cosntant alpha
1948 public boolean isWindowOpacitySupported() {
1949 return false;
1950 }
1951
1952 // Shaping
1953 public boolean isWindowShapingSupported() {
1954 return false;
1955 }
1956
1957 // Per-pixel alpha
1958 public boolean isWindowTranslucencySupported() {
1959 return false;
1960 }
1961
1962 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1963 return false;
1964 }
1965
1966 /**
1967 * Returns true if swing backbuffer should be translucent.
1968 */
1969 public boolean isSwingBackbufferTranslucencySupported() {
1970 return false;
1971 }
1972
1973 /**
1974 * Returns whether or not a containing top level window for the passed
1975 * component is
1976 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1977 *
1978 * @param c a Component which toplevel's to check
1979 * @return {@code true} if the passed component is not null and has a
1980 * containing toplevel window which is opaque (so per-pixel translucency
1981 * is not enabled), {@code false} otherwise
1982 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1983 */
1984 public static boolean isContainingTopLevelOpaque(Component c) {
1985 Window w = getContainingWindow(c);
1986 return w != null && w.isOpaque();
1987 }
1988
1989 /**
1990 * Returns whether or not a containing top level window for the passed
1991 * component is
1992 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1993 *
1994 * @param c a Component which toplevel's to check
1995 * @return {@code true} if the passed component is not null and has a
1996 * containing toplevel window which has opacity less than
1997 * 1.0f (which means that it is translucent), {@code false} otherwise
1998 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1999 */
2000 public static boolean isContainingTopLevelTranslucent(Component c) {
2001 Window w = getContainingWindow(c);
2002 return w != null && w.getOpacity() < 1.0f;
2003 }
2004
2005 /**
2006 * Returns whether the native system requires using the peer.updateWindow()
2007 * method to update the contents of a non-opaque window, or if usual
2008 * painting procedures are sufficient. The default return value covers
2009 * the X11 systems. On MS Windows this method is overriden in WToolkit
2010 * to return true.
2011 */
2012 public boolean needUpdateWindow() {
2013 return false;
2014 }
2015
2016 /**
2017 * Descendants of the SunToolkit should override and put their own logic here.
2018 */
2019 public int getNumberOfButtons(){
2020 return 3;
2021 }
2022
2023 /**
2024 * Checks that the given object implements/extends the given
2025 * interface/class.
2026 *
2027 * Note that using the instanceof operator causes a class to be loaded.
2028 * Using this method doesn't load a class and it can be used instead of
2029 * the instanceof operator for performance reasons.
2030 *
2031 * @param obj Object to be checked
2032 * @param type The name of the interface/class. Must be
2033 * fully-qualified interface/class name.
2034 * @return true, if this object implements/extends the given
2035 * interface/class, false, otherwise, or if obj or type is null
2036 */
2037 public static boolean isInstanceOf(Object obj, String type) {
2038 if (obj == null) return false;
2039 if (type == null) return false;
2040
2041 return isInstanceOf(obj.getClass(), type);
2042 }
2043
2044 private static boolean isInstanceOf(Class<?> cls, String type) {
2045 if (cls == null) return false;
2046
2047 if (cls.getName().equals(type)) {
2048 return true;
2049 }
2050
2051 for (Class<?> c : cls.getInterfaces()) {
2052 if (c.getName().equals(type)) {
2053 return true;
2054 }
2055 }
2056 return isInstanceOf(cls.getSuperclass(), type);
2057 }
2058
2059 ///////////////////////////////////////////////////////////////////////////
2060 //
2061 // The following methods help set and identify whether a particular
2062 // AWTEvent object was produced by the system or by user code. As of this
2063 // writing the only consumer is the Java Plug-In, although this information
2064 // could be useful to more clients and probably should be formalized in
2065 // the public API.
2066 //
2067 ///////////////////////////////////////////////////////////////////////////
2068
2069 public static void setSystemGenerated(AWTEvent e) {
2070 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2071 }
2072
2073 public static boolean isSystemGenerated(AWTEvent e) {
2074 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2075 }
2076
2077 } // class SunToolkit
2078
2079
2080 /*
2081 * PostEventQueue is a Thread that runs in the same AppContext as the
2082 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2083 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2084 * events to this queue, which then calls EventQueue.postEvent().
2085 *
2086 * We do this because EventQueue.postEvent() may be overridden by client
2087 * code, and we mustn't ever call client code from the toolkit thread.
2088 */
2089 class PostEventQueue {
2090 private EventQueueItem queueHead = null;
2091 private EventQueueItem queueTail = null;
2092 private final EventQueue eventQueue;
2093
2094 private Thread flushThread = null;
2095
2096 PostEventQueue(EventQueue eq) {
2097 eventQueue = eq;
2098 }
2099
2100 /*
2101 * Continually post pending AWTEvents to the Java EventQueue. The method
2102 * is synchronized to ensure the flush is completed before a new event
2103 * can be posted to this queue.
2104 *
2105 * 7177040: The method couldn't be wholly synchronized because of calls
2106 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2107 * potentially lead to deadlock
2108 */
2109 public void flush() {
2110
2111 Thread newThread = Thread.currentThread();
2112
2113 try {
2114 EventQueueItem tempQueue;
2115 synchronized (this) {
2116 // Avoid method recursion
2117 if (newThread == flushThread) {
2118 return;
2119 }
2120 // Wait for other threads' flushing
2121 while (flushThread != null) {
2122 wait();
2123 }
2124 // Skip everything if queue is empty
2125 if (queueHead == null) {
2126 return;
2127 }
2128 // Remember flushing thread
2129 flushThread = newThread;
2130
2131 tempQueue = queueHead;
2132 queueHead = queueTail = null;
2133 }
2134 try {
2135 while (tempQueue != null) {
2136 eventQueue.postEvent(tempQueue.event);
2137 tempQueue = tempQueue.next;
2138 }
2139 }
2140 finally {
2141 // Only the flushing thread can get here
2142 synchronized (this) {
2143 // Forget flushing thread, inform other pending threads
2144 flushThread = null;
2145 notifyAll();
2146 }
2147 }
2148 }
2149 catch (InterruptedException e) {
2150 // Couldn't allow exception go up, so at least recover the flag
2151 newThread.interrupt();
2152 }
2153 }
2154
2155 /*
2156 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2157 */
2158 void postEvent(AWTEvent event) {
2159 EventQueueItem item = new EventQueueItem(event);
2160
2161 synchronized (this) {
2162 if (queueHead == null) {
2163 queueHead = queueTail = item;
2164 } else {
2165 queueTail.next = item;
2166 queueTail = item;
2167 }
2168 }
2169 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2170 }
2171 } // class PostEventQueue