1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.net.URL;
40 import java.util.*;
41 import java.util.concurrent.TimeUnit;
42 import java.util.concurrent.locks.Condition;
43 import java.util.concurrent.locks.Lock;
44 import java.util.concurrent.locks.ReentrantLock;
45
46 import sun.security.util.SecurityConstants;
47 import sun.util.logging.PlatformLogger;
48 import sun.misc.SoftCache;
49 import sun.font.FontDesignMetrics;
50 import sun.awt.im.InputContext;
51 import sun.awt.image.*;
52 import sun.security.action.GetPropertyAction;
53 import sun.security.action.GetBooleanAction;
54 import java.lang.reflect.Field;
55 import java.lang.reflect.Method;
56 import java.lang.reflect.InvocationTargetException;
57 import java.security.AccessController;
58 import java.security.PrivilegedAction;
59 import java.security.PrivilegedActionException;
60 import java.security.PrivilegedExceptionAction;
61
62 public abstract class SunToolkit extends Toolkit
63 implements WindowClosingSupport, WindowClosingListener,
64 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
65
66 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunToolkit");
67
68 /* Load debug settings for native code */
69 static {
70 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
71 DebugSettings.init();
72 }
73 };
74
75 /**
76 * Special mask for the UngrabEvent events, in addition to the
77 * public masks defined in AWTEvent. Should be used as the mask
78 * value for Toolkit.addAWTEventListener.
79 */
80 public static final int GRAB_EVENT_MASK = 0x80000000;
81
82 private static Method wakeupMethod;
83 /* The key to put()/get() the PostEventQueue into/from the AppContext.
84 */
85 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
86
87 /**
88 * Number of buttons.
89 * By default it's taken from the system. If system value does not
90 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
91 */
92 protected static int numberOfButtons = 0;
93
94
95 /* XFree standard mention 24 buttons as maximum:
96 * http://www.xfree86.org/current/mouse.4.html
97 * We workaround systems supporting more than 24 buttons.
98 * Otherwise, we have to use long type values as masks
99 * which leads to API change.
100 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
101 * the 4-bytes limit for the int type. (CR 6799099)
102 * One more bit is reserved for FIRST_HIGH_BIT.
103 */
104 public final static int MAX_BUTTONS_SUPPORTED = 20;
105
106 private static void initEQ(AppContext appContext) {
107 EventQueue eventQueue;
108
109 String eqName = System.getProperty("AWT.EventQueueClass",
110 "java.awt.EventQueue");
111
112 try {
113 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
114 } catch (Exception e) {
115 e.printStackTrace();
116 System.err.println("Failed loading " + eqName + ": " + e);
117 eventQueue = new EventQueue();
118 }
119 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
120
121 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
122 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
123 }
124
125 public SunToolkit() {
126 // 7122796: Always create an EQ for the main AppContext
127 initEQ(AppContext.getMainAppContext());
128 }
129
130 public boolean useBufferPerWindow() {
131 return false;
132 }
133
134 public abstract WindowPeer createWindow(Window target)
135 throws HeadlessException;
136
137 public abstract FramePeer createFrame(Frame target)
138 throws HeadlessException;
139
140 public abstract DialogPeer createDialog(Dialog target)
141 throws HeadlessException;
142
143 public abstract ButtonPeer createButton(Button target)
144 throws HeadlessException;
145
146 public abstract TextFieldPeer createTextField(TextField target)
147 throws HeadlessException;
148
149 public abstract ChoicePeer createChoice(Choice target)
150 throws HeadlessException;
151
152 public abstract LabelPeer createLabel(Label target)
153 throws HeadlessException;
154
155 public abstract ListPeer createList(java.awt.List target)
156 throws HeadlessException;
157
158 public abstract CheckboxPeer createCheckbox(Checkbox target)
159 throws HeadlessException;
160
161 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
162 throws HeadlessException;
163
164 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
165 throws HeadlessException;
166
167 public abstract TextAreaPeer createTextArea(TextArea target)
168 throws HeadlessException;
169
170 public abstract FileDialogPeer createFileDialog(FileDialog target)
171 throws HeadlessException;
172
173 public abstract MenuBarPeer createMenuBar(MenuBar target)
174 throws HeadlessException;
175
176 public abstract MenuPeer createMenu(Menu target)
177 throws HeadlessException;
178
179 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
180 throws HeadlessException;
181
182 public abstract MenuItemPeer createMenuItem(MenuItem target)
183 throws HeadlessException;
184
185 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
186 CheckboxMenuItem target)
187 throws HeadlessException;
188
189 public abstract DragSourceContextPeer createDragSourceContextPeer(
190 DragGestureEvent dge)
191 throws InvalidDnDOperationException;
192
193 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
194 throws HeadlessException, AWTException;
195
196 public abstract SystemTrayPeer createSystemTray(SystemTray target);
197
198 public abstract boolean isTraySupported();
199
200 public abstract FontPeer getFontPeer(String name, int style);
201
202 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
203 throws AWTException;
204
205 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
206 throws HeadlessException;
207
208 /**
209 * The AWT lock is typically only used on Unix platforms to synchronize
210 * access to Xlib, OpenGL, etc. However, these methods are implemented
211 * in SunToolkit so that they can be called from shared code (e.g.
212 * from the OGL pipeline) or from the X11 pipeline regardless of whether
213 * XToolkit or MToolkit is currently in use. There are native macros
214 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
215 * methods is changed, make sure it is compatible with the native macros.
216 *
217 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
218 * used in place of:
219 * synchronized (getAWTLock()) {
220 * ...
221 * }
222 *
223 * By factoring these methods out specially, we are able to change the
224 * implementation of these methods (e.g. use more advanced locking
225 * mechanisms) without impacting calling code.
226 *
227 * Sample usage:
228 * private void doStuffWithXlib() {
229 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
230 * SunToolkit.awtLock();
231 * try {
232 * ...
233 * XlibWrapper.XDoStuff();
234 * } finally {
235 * SunToolkit.awtUnlock();
236 * }
237 * }
238 */
239
240 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
241 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
242
243 public static final void awtLock() {
244 AWT_LOCK.lock();
245 }
246
247 public static final boolean awtTryLock() {
248 return AWT_LOCK.tryLock();
249 }
250
251 public static final void awtUnlock() {
252 AWT_LOCK.unlock();
253 }
254
255 public static final void awtLockWait()
256 throws InterruptedException
257 {
258 AWT_LOCK_COND.await();
259 }
260
261 public static final void awtLockWait(long timeout)
262 throws InterruptedException
263 {
264 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
265 }
266
267 public static final void awtLockNotify() {
268 AWT_LOCK_COND.signal();
269 }
270
271 public static final void awtLockNotifyAll() {
272 AWT_LOCK_COND.signalAll();
273 }
274
275 public static final boolean isAWTLockHeldByCurrentThread() {
276 return AWT_LOCK.isHeldByCurrentThread();
277 }
278
279 /*
280 * Create a new AppContext, along with its EventQueue, for a
281 * new ThreadGroup. Browser code, for example, would use this
282 * method to create an AppContext & EventQueue for an Applet.
283 */
284 public static AppContext createNewAppContext() {
285 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
286 // Create appContext before initialization of EventQueue, so all
287 // the calls to AppContext.getAppContext() from EventQueue ctor
288 // return correct values
289 AppContext appContext = new AppContext(threadGroup);
290
291 initEQ(appContext);
292
293 return appContext;
294 }
295
296 public static Field getField(final Class klass, final String fieldName) {
297 return AccessController.doPrivileged(new PrivilegedAction<Field>() {
298 public Field run() {
299 try {
300 Field field = klass.getDeclaredField(fieldName);
301 assert (field != null);
302 field.setAccessible(true);
303 return field;
304 } catch (SecurityException e) {
305 assert false;
306 } catch (NoSuchFieldException e) {
307 assert false;
308 }
309 return null;
310 }//run
311 });
312 }
313
314 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
315 if (wakeupMethod == null){
316 wakeupMethod = (Method)AccessController.doPrivileged(new PrivilegedAction(){
317 public Object run(){
318 try {
319 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} );
320 if (method != null) {
321 method.setAccessible(true);
322 }
323 return method;
324 } catch (NoSuchMethodException e) {
325 assert false;
326 } catch (SecurityException e) {
327 assert false;
328 }
329 return null;
330 }//run
331 });
332 }
333 try{
334 if (wakeupMethod != null){
335 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)});
336 }
337 } catch (InvocationTargetException e){
338 assert false;
339 } catch (IllegalAccessException e) {
340 assert false;
341 }
342 }
343
344 /*
345 * Fetch the peer associated with the given target (as specified
346 * in the peer creation method). This can be used to determine
347 * things like what the parent peer is. If the target is null
348 * or the target can't be found (either because the a peer was
349 * never created for it or the peer was disposed), a null will
350 * be returned.
351 */
352 protected static Object targetToPeer(Object target) {
353 if (target != null && !GraphicsEnvironment.isHeadless()) {
354 return AWTAutoShutdown.getInstance().getPeer(target);
355 }
356 return null;
357 }
358
359 protected static void targetCreatedPeer(Object target, Object peer) {
360 if (target != null && peer != null &&
361 !GraphicsEnvironment.isHeadless())
362 {
363 AWTAutoShutdown.getInstance().registerPeer(target, peer);
364 }
365 }
366
367 protected static void targetDisposedPeer(Object target, Object peer) {
368 if (target != null && peer != null &&
369 !GraphicsEnvironment.isHeadless())
370 {
371 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
372 }
373 }
374
375 // Maps from non-Component/MenuComponent to AppContext.
376 // WeakHashMap<Component,AppContext>
377 private static final Map appContextMap =
378 Collections.synchronizedMap(new WeakHashMap());
379
380 /**
381 * Sets the appContext field of target. If target is not a Component or
382 * MenuComponent, this returns false.
383 */
384 private static boolean setAppContext(Object target,
385 AppContext context) {
386 if (target instanceof Component) {
387 AWTAccessor.getComponentAccessor().
388 setAppContext((Component)target, context);
389 } else if (target instanceof MenuComponent) {
390 AWTAccessor.getMenuComponentAccessor().
391 setAppContext((MenuComponent)target, context);
392 } else {
393 return false;
394 }
395 return true;
396 }
397
398 /**
399 * Returns the appContext field for target. If target is not a
400 * Component or MenuComponent this returns null.
401 */
402 private static AppContext getAppContext(Object target) {
403 if (target instanceof Component) {
404 return AWTAccessor.getComponentAccessor().
405 getAppContext((Component)target);
406 } else if (target instanceof MenuComponent) {
407 return AWTAccessor.getMenuComponentAccessor().
408 getAppContext((MenuComponent)target);
409 } else {
410 return null;
411 }
412 }
413
414 /*
415 * Fetch the AppContext associated with the given target.
416 * This can be used to determine things like which EventQueue
417 * to use for posting events to a Component. If the target is
418 * null or the target can't be found, a null with be returned.
419 */
420 public static AppContext targetToAppContext(Object target) {
421 if (target == null || GraphicsEnvironment.isHeadless()) {
422 return null;
423 }
424 AppContext context = getAppContext(target);
425 if (context == null) {
426 // target is not a Component/MenuComponent, try the
427 // appContextMap.
428 context = (AppContext)appContextMap.get(target);
429 }
430 return context;
431 }
432
433 /**
434 * Sets the synchronous status of focus requests on lightweight
435 * components in the specified window to the specified value.
436 * If the boolean parameter is <code>true</code> then the focus
437 * requests on lightweight components will be performed
438 * synchronously, if it is <code>false</code>, then asynchronously.
439 * By default, all windows have their lightweight request status
440 * set to asynchronous.
441 * <p>
442 * The application can only set the status of lightweight focus
443 * requests to synchronous for any of its windows if it doesn't
444 * perform focus transfers between different heavyweight containers.
445 * In this case the observable focus behaviour is the same as with
446 * asynchronous status.
447 * <p>
448 * If the application performs focus transfer between different
449 * heavyweight containers and sets the lightweight focus request
450 * status to synchronous for any of its windows, then further focus
451 * behaviour is unspecified.
452 * <p>
453 * @param w window for which the lightweight focus request status
454 * should be set
455 * @param status the value of lightweight focus request status
456 */
457
458 public static void setLWRequestStatus(Window changed,boolean status){
459 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
460 };
461
462 public static void checkAndSetPolicy(Container cont) {
463 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
464 getCurrentKeyboardFocusManager().
465 getDefaultFocusTraversalPolicy();
466
467 cont.setFocusTraversalPolicy(defaultPolicy);
468 }
469
470 private static FocusTraversalPolicy createLayoutPolicy() {
471 FocusTraversalPolicy policy = null;
472 try {
473 Class layoutPolicyClass =
474 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
475 policy = (FocusTraversalPolicy) layoutPolicyClass.newInstance();
476 }
477 catch (ClassNotFoundException e) {
478 assert false;
479 }
480 catch (InstantiationException e) {
481 assert false;
482 }
483 catch (IllegalAccessException e) {
484 assert false;
485 }
486
487 return policy;
488 }
489
490 /*
491 * Insert a mapping from target to AppContext, for later retrieval
492 * via targetToAppContext() above.
493 */
494 public static void insertTargetMapping(Object target, AppContext appContext) {
495 if (!GraphicsEnvironment.isHeadless()) {
496 if (!setAppContext(target, appContext)) {
497 // Target is not a Component/MenuComponent, use the private Map
498 // instead.
499 appContextMap.put(target, appContext);
500 }
501 }
502 }
503
504 /*
505 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
506 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
507 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
508 * not be called under another lock since it locks the EventQueue.
509 * See bugids 4632918, 4526597.
510 */
511 public static void postEvent(AppContext appContext, AWTEvent event) {
512 if (event == null) {
513 throw new NullPointerException();
514 }
515 // All events posted via this method are system-generated.
516 // Placing the following call here reduces considerably the
517 // number of places throughout the toolkit that would
518 // otherwise have to be modified to precisely identify
519 // system-generated events.
520 setSystemGenerated(event);
521 AppContext eventContext = targetToAppContext(event.getSource());
522 if (eventContext != null && !eventContext.equals(appContext)) {
523 log.fine("Event posted on wrong app context : " + event);
524 }
525 PostEventQueue postEventQueue =
526 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
527 if (postEventQueue != null) {
528 postEventQueue.postEvent(event);
529 }
530 }
531
532 /*
533 * Post AWTEvent of high priority.
534 */
535 public static void postPriorityEvent(final AWTEvent e) {
536 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
537 public void run() {
538 AWTAccessor.getAWTEventAccessor().setPosted(e);
539 ((Component)e.getSource()).dispatchEvent(e);
540 }
541 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
542 postEvent(targetToAppContext(e.getSource()), pe);
543 }
544
545 protected static final Lock flushLock = new ReentrantLock();
546 private static boolean isFlushingPendingEvents = false;
547
548 /*
549 * Flush any pending events which haven't been posted to the AWT
550 * EventQueue yet.
551 */
552 public static void flushPendingEvents() {
553 flushLock.lock();
554 try {
555 // Don't call flushPendingEvents() recursively
556 if (!isFlushingPendingEvents) {
557 isFlushingPendingEvents = true;
558 AppContext appContext = AppContext.getAppContext();
559 PostEventQueue postEventQueue =
560 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
561 if (postEventQueue != null) {
562 postEventQueue.flush();
563 }
564 }
565 } finally {
566 isFlushingPendingEvents = false;
567 flushLock.unlock();
568 }
569 }
570
571 public static boolean isPostEventQueueEmpty() {
572 AppContext appContext = AppContext.getAppContext();
573 PostEventQueue postEventQueue =
574 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
575 if (postEventQueue != null) {
576 return postEventQueue.noEvents();
577 } else {
578 return true;
579 }
580 }
581
582 /*
583 * Execute a chunk of code on the Java event handler thread for the
584 * given target. Does not wait for the execution to occur before
585 * returning to the caller.
586 */
587 public static void executeOnEventHandlerThread(Object target,
588 Runnable runnable) {
589 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
590 }
591
592 /*
593 * Fixed 5064013: the InvocationEvent time should be equals
594 * the time of the ActionEvent
595 */
596 public static void executeOnEventHandlerThread(Object target,
597 Runnable runnable,
598 final long when) {
599 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT){
600 public long getWhen(){
601 return when;
602 }
603 });
604 }
605
606 /*
607 * Execute a chunk of code on the Java event handler thread for the
608 * given target. Does not wait for the execution to occur before
609 * returning to the caller.
610 */
611 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
612 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
613 }
614
615 /*
616 * Execute a chunk of code on the Java event handler thread. The
617 * method takes into account provided AppContext and sets
618 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
619 * event. See 6451487 for detailes.
620 * Does not wait for the execution to occur before returning to
621 * the caller.
622 */
623 public static void invokeLaterOnAppContext(
624 AppContext appContext, Runnable dispatcher)
625 {
626 postEvent(appContext,
627 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
628 PeerEvent.PRIORITY_EVENT));
629 }
630
631 /*
632 * Execute a chunk of code on the Java event handler thread for the
633 * given target. Waits for the execution to occur before returning
634 * to the caller.
635 */
636 public static void executeOnEDTAndWait(Object target, Runnable runnable)
637 throws InterruptedException, InvocationTargetException
638 {
639 if (EventQueue.isDispatchThread()) {
640 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
641 }
642
643 class AWTInvocationLock {}
644 Object lock = new AWTInvocationLock();
645
646 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
647
648 synchronized (lock) {
649 executeOnEventHandlerThread(event);
650 while(!event.isDispatched()) {
651 lock.wait();
652 }
653 }
654
655 Throwable eventThrowable = event.getThrowable();
656 if (eventThrowable != null) {
657 throw new InvocationTargetException(eventThrowable);
658 }
659 }
660
661 /*
662 * Returns true if the calling thread is the event dispatch thread
663 * contained within AppContext which associated with the given target.
664 * Use this call to ensure that a given task is being executed
665 * (or not being) on the event dispatch thread for the given target.
666 */
667 public static boolean isDispatchThreadForAppContext(Object target) {
668 AppContext appContext = targetToAppContext(target);
669 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
670
671 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
672 return accessor.isDispatchThreadImpl(eq);
673 }
674
675 public Dimension getScreenSize() {
676 return new Dimension(getScreenWidth(), getScreenHeight());
677 }
678 protected abstract int getScreenWidth();
679 protected abstract int getScreenHeight();
680
681 public FontMetrics getFontMetrics(Font font) {
682 return FontDesignMetrics.getMetrics(font);
683 }
684
685 public String[] getFontList() {
686 String[] hardwiredFontList = {
687 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
688 Font.DIALOG_INPUT
689
690 // -- Obsolete font names from 1.0.2. It was decided that
691 // -- getFontList should not return these old names:
692 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
693 };
694 return hardwiredFontList;
695 }
696
697 public PanelPeer createPanel(Panel target) {
698 return (PanelPeer)createComponent(target);
699 }
700
701 public CanvasPeer createCanvas(Canvas target) {
702 return (CanvasPeer)createComponent(target);
703 }
704
705 /**
706 * Disables erasing of background on the canvas before painting if
707 * this is supported by the current toolkit. It is recommended to
708 * call this method early, before the Canvas becomes displayable,
709 * because some Toolkit implementations do not support changing
710 * this property once the Canvas becomes displayable.
711 */
712 public void disableBackgroundErase(Canvas canvas) {
713 disableBackgroundEraseImpl(canvas);
714 }
715
716 /**
717 * Disables the native erasing of the background on the given
718 * component before painting if this is supported by the current
719 * toolkit. This only has an effect for certain components such as
720 * Canvas, Panel and Window. It is recommended to call this method
721 * early, before the Component becomes displayable, because some
722 * Toolkit implementations do not support changing this property
723 * once the Component becomes displayable.
724 */
725 public void disableBackgroundErase(Component component) {
726 disableBackgroundEraseImpl(component);
727 }
728
729 private void disableBackgroundEraseImpl(Component component) {
730 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
731 }
732
733 /**
734 * Returns the value of "sun.awt.noerasebackground" property. Default
735 * value is {@code false}.
736 */
737 public static boolean getSunAwtNoerasebackground() {
738 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
739 }
740
741 /**
742 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
743 * value is {@code false}.
744 */
745 public static boolean getSunAwtErasebackgroundonresize() {
746 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
747 }
748
749
750 static final SoftCache imgCache = new SoftCache();
751
752 static Image getImageFromHash(Toolkit tk, URL url) {
753 SecurityManager sm = System.getSecurityManager();
754 if (sm != null) {
755 try {
756 java.security.Permission perm =
757 url.openConnection().getPermission();
758 if (perm != null) {
759 try {
760 sm.checkPermission(perm);
761 } catch (SecurityException se) {
762 // fallback to checkRead/checkConnect for pre 1.2
763 // security managers
764 if ((perm instanceof java.io.FilePermission) &&
765 perm.getActions().indexOf("read") != -1) {
766 sm.checkRead(perm.getName());
767 } else if ((perm instanceof
768 java.net.SocketPermission) &&
769 perm.getActions().indexOf("connect") != -1) {
770 sm.checkConnect(url.getHost(), url.getPort());
771 } else {
772 throw se;
773 }
774 }
775 }
776 } catch (java.io.IOException ioe) {
777 sm.checkConnect(url.getHost(), url.getPort());
778 }
779 }
780 synchronized (imgCache) {
781 Image img = (Image)imgCache.get(url);
782 if (img == null) {
783 try {
784 img = tk.createImage(new URLImageSource(url));
785 imgCache.put(url, img);
786 } catch (Exception e) {
787 }
788 }
789 return img;
790 }
791 }
792
793 static Image getImageFromHash(Toolkit tk,
794 String filename) {
795 SecurityManager security = System.getSecurityManager();
796 if (security != null) {
797 security.checkRead(filename);
798 }
799 synchronized (imgCache) {
800 Image img = (Image)imgCache.get(filename);
801 if (img == null) {
802 try {
803 img = tk.createImage(new FileImageSource(filename));
804 imgCache.put(filename, img);
805 } catch (Exception e) {
806 }
807 }
808 return img;
809 }
810 }
811
812 public Image getImage(String filename) {
813 return getImageFromHash(this, filename);
814 }
815
816 public Image getImage(URL url) {
817 return getImageFromHash(this, url);
818 }
819
820 public Image createImage(String filename) {
821 SecurityManager security = System.getSecurityManager();
822 if (security != null) {
823 security.checkRead(filename);
824 }
825 return createImage(new FileImageSource(filename));
826 }
827
828 public Image createImage(URL url) {
829 SecurityManager sm = System.getSecurityManager();
830 if (sm != null) {
831 try {
832 java.security.Permission perm =
833 url.openConnection().getPermission();
834 if (perm != null) {
835 try {
836 sm.checkPermission(perm);
837 } catch (SecurityException se) {
838 // fallback to checkRead/checkConnect for pre 1.2
839 // security managers
840 if ((perm instanceof java.io.FilePermission) &&
841 perm.getActions().indexOf("read") != -1) {
842 sm.checkRead(perm.getName());
843 } else if ((perm instanceof
844 java.net.SocketPermission) &&
845 perm.getActions().indexOf("connect") != -1) {
846 sm.checkConnect(url.getHost(), url.getPort());
847 } else {
848 throw se;
849 }
850 }
851 }
852 } catch (java.io.IOException ioe) {
853 sm.checkConnect(url.getHost(), url.getPort());
854 }
855 }
856 return createImage(new URLImageSource(url));
857 }
858
859 public Image createImage(byte[] data, int offset, int length) {
860 return createImage(new ByteArrayImageSource(data, offset, length));
861 }
862
863 public Image createImage(ImageProducer producer) {
864 return new ToolkitImage(producer);
865 }
866
867 public int checkImage(Image img, int w, int h, ImageObserver o) {
868 if (!(img instanceof ToolkitImage)) {
869 return ImageObserver.ALLBITS;
870 }
871
872 ToolkitImage tkimg = (ToolkitImage)img;
873 int repbits;
874 if (w == 0 || h == 0) {
875 repbits = ImageObserver.ALLBITS;
876 } else {
877 repbits = tkimg.getImageRep().check(o);
878 }
879 return tkimg.check(o) | repbits;
880 }
881
882 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
883 if (w == 0 || h == 0) {
884 return true;
885 }
886
887 // Must be a ToolkitImage
888 if (!(img instanceof ToolkitImage)) {
889 return true;
890 }
891
892 ToolkitImage tkimg = (ToolkitImage)img;
893 if (tkimg.hasError()) {
894 if (o != null) {
895 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
896 -1, -1, -1, -1);
897 }
898 return false;
899 }
900 ImageRepresentation ir = tkimg.getImageRep();
901 return ir.prepare(o);
902 }
903
904 /**
905 * Scans {@code imageList} for best-looking image of specified dimensions.
906 * Image can be scaled and/or padded with transparency.
907 */
908 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
909 if (width == 0 || height == 0) {
910 return null;
911 }
912 Image bestImage = null;
913 int bestWidth = 0;
914 int bestHeight = 0;
915 double bestSimilarity = 3; //Impossibly high value
916 double bestScaleFactor = 0;
917 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
918 //Iterate imageList looking for best matching image.
919 //'Similarity' measure is defined as good scale factor and small insets.
920 //best possible similarity is 0 (no scale, no insets).
921 //It's found while the experiments that good-looking result is achieved
922 //with scale factors x1, x3/4, x2/3, xN, x1/N.
923 Image im = i.next();
924 if (im == null) {
925 if (log.isLoggable(PlatformLogger.FINER)) {
926 log.finer("SunToolkit.getScaledIconImage: " +
927 "Skipping the image passed into Java because it's null.");
928 }
929 continue;
930 }
931 if (im instanceof ToolkitImage) {
932 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
933 ir.reconstruct(ImageObserver.ALLBITS);
934 }
935 int iw;
936 int ih;
937 try {
938 iw = im.getWidth(null);
939 ih = im.getHeight(null);
940 } catch (Exception e){
941 if (log.isLoggable(PlatformLogger.FINER)) {
942 log.finer("SunToolkit.getScaledIconImage: " +
943 "Perhaps the image passed into Java is broken. Skipping this icon.");
944 }
945 continue;
946 }
947 if (iw > 0 && ih > 0) {
948 //Calc scale factor
949 double scaleFactor = Math.min((double)width / (double)iw,
950 (double)height / (double)ih);
951 //Calculate scaled image dimensions
952 //adjusting scale factor to nearest "good" value
953 int adjw = 0;
954 int adjh = 0;
955 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
956 if (scaleFactor >= 2) {
957 //Need to enlarge image more than twice
958 //Round down scale factor to multiply by integer value
959 scaleFactor = Math.floor(scaleFactor);
960 adjw = iw * (int)scaleFactor;
961 adjh = ih * (int)scaleFactor;
962 scaleMeasure = 1.0 - 0.5 / scaleFactor;
963 } else if (scaleFactor >= 1) {
964 //Don't scale
965 scaleFactor = 1.0;
966 adjw = iw;
967 adjh = ih;
968 scaleMeasure = 0;
969 } else if (scaleFactor >= 0.75) {
970 //Multiply by 3/4
971 scaleFactor = 0.75;
972 adjw = iw * 3 / 4;
973 adjh = ih * 3 / 4;
974 scaleMeasure = 0.3;
975 } else if (scaleFactor >= 0.6666) {
976 //Multiply by 2/3
977 scaleFactor = 0.6666;
978 adjw = iw * 2 / 3;
979 adjh = ih * 2 / 3;
980 scaleMeasure = 0.33;
981 } else {
982 //Multiply size by 1/scaleDivider
983 //where scaleDivider is minimum possible integer
984 //larger than 1/scaleFactor
985 double scaleDivider = Math.ceil(1.0 / scaleFactor);
986 scaleFactor = 1.0 / scaleDivider;
987 adjw = (int)Math.round((double)iw / scaleDivider);
988 adjh = (int)Math.round((double)ih / scaleDivider);
989 scaleMeasure = 1.0 - 1.0 / scaleDivider;
990 }
991 double similarity = ((double)width - (double)adjw) / (double)width +
992 ((double)height - (double)adjh) / (double)height + //Large padding is bad
993 scaleMeasure; //Large rescale is bad
994 if (similarity < bestSimilarity) {
995 bestSimilarity = similarity;
996 bestScaleFactor = scaleFactor;
997 bestImage = im;
998 bestWidth = adjw;
999 bestHeight = adjh;
1000 }
1001 if (similarity == 0) break;
1002 }
1003 }
1004 if (bestImage == null) {
1005 //No images were found, possibly all are broken
1006 return null;
1007 }
1008 BufferedImage bimage =
1009 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1010 Graphics2D g = bimage.createGraphics();
1011 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1012 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1013 try {
1014 int x = (width - bestWidth) / 2;
1015 int y = (height - bestHeight) / 2;
1016 if (log.isLoggable(PlatformLogger.FINER)) {
1017 log.finer("WWindowPeer.getScaledIconData() result : " +
1018 "w : " + width + " h : " + height +
1019 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1020 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1021 " adjW : " + bestWidth + " adjH : " + bestHeight +
1022 " x : " + x + " y : " + y);
1023 }
1024 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1025 } finally {
1026 g.dispose();
1027 }
1028 return bimage;
1029 }
1030
1031 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1032 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1033 if (bimage == null) {
1034 if (log.isLoggable(PlatformLogger.FINER)) {
1035 log.finer("SunToolkit.getScaledIconData: " +
1036 "Perhaps the image passed into Java is broken. Skipping this icon.");
1037 }
1038 return null;
1039 }
1040 Raster raster = bimage.getRaster();
1041 DataBuffer buffer = raster.getDataBuffer();
1042 return (DataBufferInt)buffer;
1043 }
1044
1045 protected EventQueue getSystemEventQueueImpl() {
1046 return getSystemEventQueueImplPP();
1047 }
1048
1049 // Package private implementation
1050 static EventQueue getSystemEventQueueImplPP() {
1051 return getSystemEventQueueImplPP(AppContext.getAppContext());
1052 }
1053
1054 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1055 EventQueue theEventQueue =
1056 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1057 return theEventQueue;
1058 }
1059
1060 /**
1061 * Give native peers the ability to query the native container
1062 * given a native component (eg the direct parent may be lightweight).
1063 */
1064 public static Container getNativeContainer(Component c) {
1065 return Toolkit.getNativeContainer(c);
1066 }
1067
1068 /**
1069 * Gives native peers the ability to query the closest HW component.
1070 * If the given component is heavyweight, then it returns this. Otherwise,
1071 * it goes one level up in the hierarchy and tests next component.
1072 */
1073 public static Component getHeavyweightComponent(Component c) {
1074 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1075 c = AWTAccessor.getComponentAccessor().getParent(c);
1076 }
1077 return c;
1078 }
1079
1080 /**
1081 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1082 */
1083 public int getFocusAcceleratorKeyMask() {
1084 return InputEvent.ALT_MASK;
1085 }
1086
1087 /**
1088 * Tests whether specified key modifiers mask can be used to enter a printable
1089 * character. This is a default implementation of this method, which reflects
1090 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1091 * characters from the extended character set (like euro sign or math symbols)
1092 */
1093 public boolean isPrintableCharacterModifiersMask(int mods) {
1094 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1095 }
1096
1097 /**
1098 * Returns whether popup is allowed to be shown above the task bar.
1099 * This is a default implementation of this method, which checks
1100 * corresponding security permission.
1101 */
1102 public boolean canPopupOverlapTaskBar() {
1103 boolean result = true;
1104 try {
1105 SecurityManager sm = System.getSecurityManager();
1106 if (sm != null) {
1107 sm.checkPermission(
1108 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1109 }
1110 } catch (SecurityException se) {
1111 // There is no permission to show popups over the task bar
1112 result = false;
1113 }
1114 return result;
1115 }
1116
1117 /**
1118 * Returns a new input method window, with behavior as specified in
1119 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1120 * If the inputContext is not null, the window should return it from its
1121 * getInputContext() method. The window needs to implement
1122 * sun.awt.im.InputMethodWindow.
1123 * <p>
1124 * SunToolkit subclasses can override this method to return better input
1125 * method windows.
1126 */
1127 public Window createInputMethodWindow(String title, InputContext context) {
1128 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1129 }
1130
1131 /**
1132 * Returns whether enableInputMethods should be set to true for peered
1133 * TextComponent instances on this platform. False by default.
1134 */
1135 public boolean enableInputMethodsForTextComponent() {
1136 return false;
1137 }
1138
1139 private static Locale startupLocale = null;
1140
1141 /**
1142 * Returns the locale in which the runtime was started.
1143 */
1144 public static Locale getStartupLocale() {
1145 if (startupLocale == null) {
1146 String language, region, country, variant;
1147 language = (String) AccessController.doPrivileged(
1148 new GetPropertyAction("user.language", "en"));
1149 // for compatibility, check for old user.region property
1150 region = (String) AccessController.doPrivileged(
1151 new GetPropertyAction("user.region"));
1152 if (region != null) {
1153 // region can be of form country, country_variant, or _variant
1154 int i = region.indexOf('_');
1155 if (i >= 0) {
1156 country = region.substring(0, i);
1157 variant = region.substring(i + 1);
1158 } else {
1159 country = region;
1160 variant = "";
1161 }
1162 } else {
1163 country = (String) AccessController.doPrivileged(
1164 new GetPropertyAction("user.country", ""));
1165 variant = (String) AccessController.doPrivileged(
1166 new GetPropertyAction("user.variant", ""));
1167 }
1168 startupLocale = new Locale(language, country, variant);
1169 }
1170 return startupLocale;
1171 }
1172
1173 /**
1174 * Returns the default keyboard locale of the underlying operating system
1175 */
1176 public Locale getDefaultKeyboardLocale() {
1177 return getStartupLocale();
1178 }
1179
1180 private static String dataTransfererClassName = null;
1181
1182 protected static void setDataTransfererClassName(String className) {
1183 dataTransfererClassName = className;
1184 }
1185
1186 public static String getDataTransfererClassName() {
1187 if (dataTransfererClassName == null) {
1188 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1189 }
1190 return dataTransfererClassName;
1191 }
1192
1193 // Support for window closing event notifications
1194 private transient WindowClosingListener windowClosingListener = null;
1195 /**
1196 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1197 */
1198 public WindowClosingListener getWindowClosingListener() {
1199 return windowClosingListener;
1200 }
1201 /**
1202 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1203 */
1204 public void setWindowClosingListener(WindowClosingListener wcl) {
1205 windowClosingListener = wcl;
1206 }
1207
1208 /**
1209 * @see sun.awt.WindowClosingListener#windowClosingNotify
1210 */
1211 public RuntimeException windowClosingNotify(WindowEvent event) {
1212 if (windowClosingListener != null) {
1213 return windowClosingListener.windowClosingNotify(event);
1214 } else {
1215 return null;
1216 }
1217 }
1218 /**
1219 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1220 */
1221 public RuntimeException windowClosingDelivered(WindowEvent event) {
1222 if (windowClosingListener != null) {
1223 return windowClosingListener.windowClosingDelivered(event);
1224 } else {
1225 return null;
1226 }
1227 }
1228
1229 private static DefaultMouseInfoPeer mPeer = null;
1230
1231 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1232 if (mPeer == null) {
1233 mPeer = new DefaultMouseInfoPeer();
1234 }
1235 return mPeer;
1236 }
1237
1238
1239 /**
1240 * Returns whether default toolkit needs the support of the xembed
1241 * from embedding host(if any).
1242 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1243 */
1244 public static boolean needsXEmbed() {
1245 String noxembed = (String) AccessController.
1246 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1247 if ("true".equals(noxembed)) {
1248 return false;
1249 }
1250
1251 Toolkit tk = Toolkit.getDefaultToolkit();
1252 if (tk instanceof SunToolkit) {
1253 // SunToolkit descendants should override this method to specify
1254 // concrete behavior
1255 return ((SunToolkit)tk).needsXEmbedImpl();
1256 } else {
1257 // Non-SunToolkit doubtly might support XEmbed
1258 return false;
1259 }
1260 }
1261
1262 /**
1263 * Returns whether this toolkit needs the support of the xembed
1264 * from embedding host(if any).
1265 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1266 */
1267 protected boolean needsXEmbedImpl() {
1268 return false;
1269 }
1270
1271 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1272
1273 /**
1274 * Returns whether the XEmbed server feature is requested by
1275 * developer. If true, Toolkit should return an
1276 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1277 */
1278 protected final boolean isXEmbedServerRequested() {
1279 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1280 }
1281
1282 /**
1283 * Returns whether the modal exclusion API is supported by the current toolkit.
1284 * When it isn't supported, calling <code>setModalExcluded</code> has no
1285 * effect, and <code>isModalExcluded</code> returns false for all windows.
1286 *
1287 * @return true if modal exclusion is supported by the toolkit, false otherwise
1288 *
1289 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1290 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1291 *
1292 * @since 1.5
1293 */
1294 public static boolean isModalExcludedSupported()
1295 {
1296 Toolkit tk = Toolkit.getDefaultToolkit();
1297 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1298 }
1299 /*
1300 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1301 *
1302 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1303 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1304 *
1305 * @since 1.5
1306 */
1307 protected boolean isModalExcludedSupportedImpl()
1308 {
1309 return false;
1310 }
1311
1312 /*
1313 * Sets this window to be excluded from being modally blocked. When the
1314 * toolkit supports modal exclusion and this method is called, input
1315 * events, focus transfer and z-order will continue to work for the
1316 * window, it's owned windows and child components, even in the
1317 * presence of a modal dialog.
1318 * For details on which <code>Window</code>s are normally blocked
1319 * by modal dialog, see {@link java.awt.Dialog}.
1320 * Invoking this method when the modal exclusion API is not supported by
1321 * the current toolkit has no effect.
1322 * @param window Window to be marked as not modally blocked
1323 * @see java.awt.Dialog
1324 * @see java.awt.Dialog#setModal(boolean)
1325 * @see sun.awt.SunToolkit#isModalExcludedSupported
1326 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1327 */
1328 public static void setModalExcluded(Window window)
1329 {
1330 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1331 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1332 }
1333 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1334 }
1335
1336 /*
1337 * Returns whether the specified window is blocked by modal dialogs.
1338 * If the modal exclusion API isn't supported by the current toolkit,
1339 * it returns false for all windows.
1340 *
1341 * @param window Window to test for modal exclusion
1342 *
1343 * @return true if the window is modal excluded, false otherwise. If
1344 * the modal exclusion isn't supported by the current Toolkit, false
1345 * is returned
1346 *
1347 * @see sun.awt.SunToolkit#isModalExcludedSupported
1348 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1349 *
1350 * @since 1.5
1351 */
1352 public static boolean isModalExcluded(Window window)
1353 {
1354 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1355 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1356 }
1357 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1358 }
1359
1360 /**
1361 * Overridden in XToolkit and WToolkit
1362 */
1363 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1364 return (modalityType == Dialog.ModalityType.MODELESS) ||
1365 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1366 }
1367
1368 /**
1369 * Overridden in XToolkit and WToolkit
1370 */
1371 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1372 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1373 }
1374
1375 ///////////////////////////////////////////////////////////////////////////
1376 //
1377 // The following is used by the Java Plug-in to coordinate dialog modality
1378 // between containing applications (browsers, ActiveX containers etc) and
1379 // the AWT.
1380 //
1381 ///////////////////////////////////////////////////////////////////////////
1382
1383 private ModalityListenerList modalityListeners = new ModalityListenerList();
1384
1385 public void addModalityListener(ModalityListener listener) {
1386 modalityListeners.add(listener);
1387 }
1388
1389 public void removeModalityListener(ModalityListener listener) {
1390 modalityListeners.remove(listener);
1391 }
1392
1393 public void notifyModalityPushed(Dialog dialog) {
1394 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1395 }
1396
1397 public void notifyModalityPopped(Dialog dialog) {
1398 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1399 }
1400
1401 final void notifyModalityChange(int id, Dialog source) {
1402 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1403 ev.dispatch();
1404 }
1405
1406 static class ModalityListenerList implements ModalityListener {
1407
1408 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1409
1410 void add(ModalityListener listener) {
1411 listeners.addElement(listener);
1412 }
1413
1414 void remove(ModalityListener listener) {
1415 listeners.removeElement(listener);
1416 }
1417
1418 public void modalityPushed(ModalityEvent ev) {
1419 Iterator<ModalityListener> it = listeners.iterator();
1420 while (it.hasNext()) {
1421 it.next().modalityPushed(ev);
1422 }
1423 }
1424
1425 public void modalityPopped(ModalityEvent ev) {
1426 Iterator<ModalityListener> it = listeners.iterator();
1427 while (it.hasNext()) {
1428 it.next().modalityPopped(ev);
1429 }
1430 }
1431 } // end of class ModalityListenerList
1432
1433 ///////////////////////////////////////////////////////////////////////////
1434 // End Plug-in code
1435 ///////////////////////////////////////////////////////////////////////////
1436
1437 public static boolean isLightweightOrUnknown(Component comp) {
1438 if (comp.isLightweight()
1439 || !(getDefaultToolkit() instanceof SunToolkit))
1440 {
1441 return true;
1442 }
1443 return !(comp instanceof Button
1444 || comp instanceof Canvas
1445 || comp instanceof Checkbox
1446 || comp instanceof Choice
1447 || comp instanceof Label
1448 || comp instanceof java.awt.List
1449 || comp instanceof Panel
1450 || comp instanceof Scrollbar
1451 || comp instanceof ScrollPane
1452 || comp instanceof TextArea
1453 || comp instanceof TextField
1454 || comp instanceof Window);
1455 }
1456
1457 public static Method getMethod(final Class clz, final String methodName, final Class[] params) {
1458 Method res = null;
1459 try {
1460 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1461 public Method run() throws Exception {
1462 Method m = clz.getDeclaredMethod(methodName, params);
1463 m.setAccessible(true);
1464 return m;
1465 }
1466 });
1467 } catch (PrivilegedActionException ex) {
1468 ex.printStackTrace();
1469 }
1470 return res;
1471 }
1472
1473 public static class OperationTimedOut extends RuntimeException {
1474 public OperationTimedOut(String msg) {
1475 super(msg);
1476 }
1477 public OperationTimedOut() {
1478 }
1479 }
1480 public static class InfiniteLoop extends RuntimeException {
1481 }
1482
1483 public static class IllegalThreadException extends RuntimeException {
1484 public IllegalThreadException(String msg) {
1485 super(msg);
1486 }
1487 public IllegalThreadException() {
1488 }
1489 }
1490
1491 public static final int DEFAULT_WAIT_TIME = 10000;
1492 private static final int MAX_ITERS = 20;
1493 private static final int MIN_ITERS = 0;
1494 private static final int MINIMAL_EDELAY = 0;
1495
1496 /**
1497 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1498 */
1499 public void realSync() throws OperationTimedOut, InfiniteLoop {
1500 realSync(DEFAULT_WAIT_TIME);
1501 }
1502
1503 /**
1504 * Forces toolkit to synchronize with the native windowing
1505 * sub-system, flushing all pending work and waiting for all the
1506 * events to be processed. This method guarantees that after
1507 * return no additional Java events will be generated, unless
1508 * cause by user. Obviously, the method cannot be used on the
1509 * event dispatch thread (EDT). In case it nevertheless gets
1510 * invoked on this thread, the method throws the
1511 * IllegalThreadException runtime exception.
1512 *
1513 * <p> This method allows to write tests without explicit timeouts
1514 * or wait for some event. Example:
1515 * <code>
1516 * Frame f = ...;
1517 * f.setVisible(true);
1518 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1519 * </code>
1520 *
1521 * <p> After realSync, <code>f</code> will be completely visible
1522 * on the screen, its getLocationOnScreen will be returning the
1523 * right result and it will be the focus owner.
1524 *
1525 * <p> Another example:
1526 * <code>
1527 * b.requestFocus();
1528 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1529 * </code>
1530 *
1531 * <p> After realSync, <code>b</code> will be focus owner.
1532 *
1533 * <p> Notice that realSync isn't guaranteed to work if recurring
1534 * actions occur, such as if during processing of some event
1535 * another request which may generate some events occurs. By
1536 * default, sync tries to perform as much as {@value MAX_ITERS}
1537 * cycles of event processing, allowing for roughly {@value
1538 * MAX_ITERS} additional requests.
1539 *
1540 * <p> For example, requestFocus() generates native request, which
1541 * generates one or two Java focus events, which then generate a
1542 * serie of paint events, a serie of Java focus events, which then
1543 * generate a serie of paint events which then are processed -
1544 * three cycles, minimum.
1545 *
1546 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1547 */
1548 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1549 {
1550 if (EventQueue.isDispatchThread()) {
1551 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1552 }
1553 int bigLoop = 0;
1554 do {
1555 // Let's do sync first
1556 sync();
1557
1558 // During the wait process, when we were processing incoming
1559 // events, we could have made some new request, which can
1560 // generate new events. Example: MapNotify/XSetInputFocus.
1561 // Therefore, we dispatch them as long as there is something
1562 // to dispatch.
1563 int iters = 0;
1564 while (iters < MIN_ITERS) {
1565 syncNativeQueue(timeout);
1566 iters++;
1567 }
1568 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1569 iters++;
1570 }
1571 if (iters >= MAX_ITERS) {
1572 throw new InfiniteLoop();
1573 }
1574
1575 // native requests were dispatched by X/Window Manager or Windows
1576 // Moreover, we processed them all on Toolkit thread
1577 // Now wait while EDT processes them.
1578 //
1579 // During processing of some events (focus, for example),
1580 // some other events could have been generated. So, after
1581 // waitForIdle, we may end up with full EventQueue
1582 iters = 0;
1583 while (iters < MIN_ITERS) {
1584 waitForIdle(timeout);
1585 iters++;
1586 }
1587 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1588 iters++;
1589 }
1590 if (iters >= MAX_ITERS) {
1591 throw new InfiniteLoop();
1592 }
1593
1594 bigLoop++;
1595 // Again, for Java events, it was simple to check for new Java
1596 // events by checking event queue, but what if Java events
1597 // resulted in native requests? Therefor, check native events again.
1598 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1599 }
1600
1601 /**
1602 * Platform toolkits need to implement this method to perform the
1603 * sync of the native queue. The method should wait until native
1604 * requests are processed, all native events are processed and
1605 * corresponding Java events are generated. Should return
1606 * <code>true</code> if some events were processed,
1607 * <code>false</code> otherwise.
1608 */
1609 protected abstract boolean syncNativeQueue(final long timeout);
1610
1611 private boolean eventDispatched = false;
1612 private boolean queueEmpty = false;
1613 private final Object waitLock = "Wait Lock";
1614
1615 static Method eqNoEvents;
1616
1617 private boolean isEQEmpty() {
1618 EventQueue queue = getSystemEventQueueImpl();
1619 synchronized(SunToolkit.class) {
1620 if (eqNoEvents == null) {
1621 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1622 }
1623 }
1624 try {
1625 return (Boolean)eqNoEvents.invoke(queue);
1626 } catch (Exception e) {
1627 e.printStackTrace();
1628 return false;
1629 }
1630 }
1631
1632 /**
1633 * Waits for the Java event queue to empty. Ensures that all
1634 * events are processed (including paint events), and that if
1635 * recursive events were generated, they are also processed.
1636 * Should return <code>true</code> if more processing is
1637 * necessary, <code>false</code> otherwise.
1638 */
1639 protected final boolean waitForIdle(final long timeout) {
1640 flushPendingEvents();
1641 boolean queueWasEmpty = isEQEmpty();
1642 queueEmpty = false;
1643 eventDispatched = false;
1644 synchronized(waitLock) {
1645 postEvent(AppContext.getAppContext(),
1646 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1647 public void dispatch() {
1648 // Here we block EDT. It could have some
1649 // events, it should have dispatched them by
1650 // now. So native requests could have been
1651 // generated. First, dispatch them. Then,
1652 // flush Java events again.
1653 int iters = 0;
1654 while (iters < MIN_ITERS) {
1655 syncNativeQueue(timeout);
1656 iters++;
1657 }
1658 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1659 iters++;
1660 }
1661 flushPendingEvents();
1662
1663 synchronized(waitLock) {
1664 queueEmpty = isEQEmpty();
1665 eventDispatched = true;
1666 waitLock.notifyAll();
1667 }
1668 }
1669 });
1670 try {
1671 while (!eventDispatched) {
1672 waitLock.wait();
1673 }
1674 } catch (InterruptedException ie) {
1675 return false;
1676 }
1677 }
1678
1679 try {
1680 Thread.sleep(MINIMAL_EDELAY);
1681 } catch (InterruptedException ie) {
1682 throw new RuntimeException("Interrupted");
1683 }
1684
1685 flushPendingEvents();
1686
1687 // Lock to force write-cache flush for queueEmpty.
1688 synchronized (waitLock) {
1689 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1690 }
1691 }
1692
1693 /**
1694 * Grabs the mouse input for the given window. The window must be
1695 * visible. The window or its children do not receive any
1696 * additional mouse events besides those targeted to them. All
1697 * other events will be dispatched as before - to the respective
1698 * targets. This Window will receive UngrabEvent when automatic
1699 * ungrab is about to happen. The event can be listened to by
1700 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1701 * UngrabEvent class for the list of conditions when ungrab is
1702 * about to happen.
1703 * @see UngrabEvent
1704 */
1705 public abstract void grab(Window w);
1706
1707 /**
1708 * Forces ungrab. No event will be sent.
1709 */
1710 public abstract void ungrab(Window w);
1711
1712
1713 /**
1714 * Locates the splash screen library in a platform dependent way and closes
1715 * the splash screen. Should be invoked on first top-level frame display.
1716 * @see java.awt.SplashScreen
1717 * @since 1.6
1718 */
1719 public static native void closeSplashScreen();
1720
1721 /* The following methods and variables are to support retrieving
1722 * desktop text anti-aliasing settings
1723 */
1724
1725 /* Need an instance method because setDesktopProperty(..) is protected. */
1726 private void fireDesktopFontPropertyChanges() {
1727 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1728 SunToolkit.getDesktopFontHints());
1729 }
1730
1731 private static boolean checkedSystemAAFontSettings;
1732 private static boolean useSystemAAFontSettings;
1733 private static boolean lastExtraCondition = true;
1734 private static RenderingHints desktopFontHints;
1735
1736 /* Since Swing is the reason for this "extra condition" logic its
1737 * worth documenting it in some detail.
1738 * First, a goal is for Swing and applications to both retrieve and
1739 * use the same desktop property value so that there is complete
1740 * consistency between the settings used by JDK's Swing implementation
1741 * and 3rd party custom Swing components, custom L&Fs and any general
1742 * text rendering that wants to be consistent with these.
1743 * But by default on Solaris & Linux Swing will not use AA text over
1744 * remote X11 display (unless Xrender can be used which is TBD and may not
1745 * always be available anyway) as that is a noticeable performance hit.
1746 * So there needs to be a way to express that extra condition so that
1747 * it is seen by all clients of the desktop property API.
1748 * If this were the only condition it could be handled here as it would
1749 * be the same for any L&F and could reasonably be considered to be
1750 * a static behaviour of those systems.
1751 * But GTK currently has an additional test based on locale which is
1752 * not applied by Metal. So mixing GTK in a few locales with Metal
1753 * would mean the last one wins.
1754 * This could be stored per-app context which would work
1755 * for different applets, but wouldn't help for a single application
1756 * using GTK and some other L&F concurrently.
1757 * But it is expected this will be addressed within GTK and the font
1758 * system so is a temporary and somewhat unlikely harmless corner case.
1759 */
1760 public static void setAAFontSettingsCondition(boolean extraCondition) {
1761 if (extraCondition != lastExtraCondition) {
1762 lastExtraCondition = extraCondition;
1763 if (checkedSystemAAFontSettings) {
1764 /* Someone already asked for this info, under a different
1765 * condition.
1766 * We'll force re-evaluation instead of replicating the
1767 * logic, then notify any listeners of any change.
1768 */
1769 checkedSystemAAFontSettings = false;
1770 Toolkit tk = Toolkit.getDefaultToolkit();
1771 if (tk instanceof SunToolkit) {
1772 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1773 }
1774 }
1775 }
1776 }
1777
1778 /* "false", "off", ""default" aren't explicitly tested, they
1779 * just fall through to produce a null return which all are equated to
1780 * "false".
1781 */
1782 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1783 Object aaHint = null;
1784 hintname = hintname.toLowerCase(Locale.ENGLISH);
1785 if (hintname.equals("on")) {
1786 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1787 } else if (hintname.equals("gasp")) {
1788 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1789 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1790 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1791 } else if (hintname.equals("lcd_hbgr")) {
1792 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1793 } else if (hintname.equals("lcd_vrgb")) {
1794 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1795 } else if (hintname.equals("lcd_vbgr")) {
1796 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1797 }
1798 if (aaHint != null) {
1799 RenderingHints map = new RenderingHints(null);
1800 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1801 return map;
1802 } else {
1803 return null;
1804 }
1805 }
1806
1807 /* This method determines whether to use the system font settings,
1808 * or ignore them if a L&F has specified they should be ignored, or
1809 * to override both of these with a system property specified value.
1810 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1811 * system property isn't applied as desktop properties are considered
1812 * to be inapplicable in that case. In that headless case although
1813 * this method will return "true" the toolkit will return a null map.
1814 */
1815 private static boolean useSystemAAFontSettings() {
1816 if (!checkedSystemAAFontSettings) {
1817 useSystemAAFontSettings = true; /* initially set this true */
1818 String systemAAFonts = null;
1819 Toolkit tk = Toolkit.getDefaultToolkit();
1820 if (tk instanceof SunToolkit) {
1821 systemAAFonts =
1822 (String)AccessController.doPrivileged(
1823 new GetPropertyAction("awt.useSystemAAFontSettings"));
1824 }
1825 if (systemAAFonts != null) {
1826 useSystemAAFontSettings =
1827 Boolean.valueOf(systemAAFonts).booleanValue();
1828 /* If it is anything other than "true", then it may be
1829 * a hint name , or it may be "off, "default", etc.
1830 */
1831 if (!useSystemAAFontSettings) {
1832 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1833 }
1834 }
1835 /* If its still true, apply the extra condition */
1836 if (useSystemAAFontSettings) {
1837 useSystemAAFontSettings = lastExtraCondition;
1838 }
1839 checkedSystemAAFontSettings = true;
1840 }
1841 return useSystemAAFontSettings;
1842 }
1843
1844 /* A variable defined for the convenience of JDK code */
1845 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1846
1847 /* Overridden by subclasses to return platform/desktop specific values */
1848 protected RenderingHints getDesktopAAHints() {
1849 return null;
1850 }
1851
1852 /* Subclass desktop property loading methods call this which
1853 * in turn calls the appropriate subclass implementation of
1854 * getDesktopAAHints() when system settings are being used.
1855 * Its public rather than protected because subclasses may delegate
1856 * to a helper class.
1857 */
1858 public static RenderingHints getDesktopFontHints() {
1859 if (useSystemAAFontSettings()) {
1860 Toolkit tk = Toolkit.getDefaultToolkit();
1861 if (tk instanceof SunToolkit) {
1862 Object map = ((SunToolkit)tk).getDesktopAAHints();
1863 return (RenderingHints)map;
1864 } else { /* Headless Toolkit */
1865 return null;
1866 }
1867 } else if (desktopFontHints != null) {
1868 /* cloning not necessary as the return value is cloned later, but
1869 * its harmless.
1870 */
1871 return (RenderingHints)(desktopFontHints.clone());
1872 } else {
1873 return null;
1874 }
1875 }
1876
1877
1878 public abstract boolean isDesktopSupported();
1879
1880 /*
1881 * consumeNextKeyTyped() method is not currently used,
1882 * however Swing could use it in the future.
1883 */
1884 private static Method consumeNextKeyTypedMethod = null;
1885 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1886 if (consumeNextKeyTypedMethod == null) {
1887 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1888 "consumeNextKeyTyped",
1889 new Class[] {KeyEvent.class});
1890 }
1891 try {
1892 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1893 keyEvent);
1894 } catch (IllegalAccessException iae) {
1895 iae.printStackTrace();
1896 } catch (InvocationTargetException ite) {
1897 ite.printStackTrace();
1898 }
1899 }
1900
1901 protected static void dumpPeers(final PlatformLogger aLog) {
1902 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1903 }
1904
1905 /**
1906 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1907 * @return Window ancestor of the component or component by itself if it is Window;
1908 * null, if component is not a part of window hierarchy
1909 */
1910 public static Window getContainingWindow(Component comp) {
1911 while (comp != null && !(comp instanceof Window)) {
1912 comp = comp.getParent();
1913 }
1914 return (Window)comp;
1915 }
1916
1917 /**
1918 * Returns the value of the system property indicated by the specified key.
1919 */
1920 public static String getSystemProperty(final String key) {
1921 return (String)AccessController.doPrivileged(new PrivilegedAction() {
1922 public Object run() {
1923 return System.getProperty(key);
1924 }
1925 });
1926 }
1927
1928 /**
1929 * Returns the boolean value of the system property indicated by the specified key.
1930 */
1931 protected static Boolean getBooleanSystemProperty(String key) {
1932 return Boolean.valueOf(AccessController.
1933 doPrivileged(new GetBooleanAction(key)));
1934 }
1935
1936 private static Boolean sunAwtDisableMixing = null;
1937
1938 /**
1939 * Returns the value of "sun.awt.disableMixing" property. Default
1940 * value is {@code false}.
1941 */
1942 public synchronized static boolean getSunAwtDisableMixing() {
1943 if (sunAwtDisableMixing == null) {
1944 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1945 }
1946 return sunAwtDisableMixing.booleanValue();
1947 }
1948
1949 /**
1950 * Returns true if the native GTK libraries are available. The
1951 * default implementation returns false, but UNIXToolkit overrides this
1952 * method to provide a more specific answer.
1953 */
1954 public boolean isNativeGTKAvailable() {
1955 return false;
1956 }
1957
1958 // Cosntant alpha
1959 public boolean isWindowOpacitySupported() {
1960 return false;
1961 }
1962
1963 // Shaping
1964 public boolean isWindowShapingSupported() {
1965 return false;
1966 }
1967
1968 // Per-pixel alpha
1969 public boolean isWindowTranslucencySupported() {
1970 return false;
1971 }
1972
1973 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1974 return false;
1975 }
1976
1977 /**
1978 * Returns true if swing backbuffer should be translucent.
1979 */
1980 public boolean isSwingBackbufferTranslucencySupported() {
1981 return false;
1982 }
1983
1984 /**
1985 * Returns whether or not a containing top level window for the passed
1986 * component is
1987 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1988 *
1989 * @param c a Component which toplevel's to check
1990 * @return {@code true} if the passed component is not null and has a
1991 * containing toplevel window which is opaque (so per-pixel translucency
1992 * is not enabled), {@code false} otherwise
1993 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1994 */
1995 public static boolean isContainingTopLevelOpaque(Component c) {
1996 Window w = getContainingWindow(c);
1997 return w != null && w.isOpaque();
1998 }
1999
2000 /**
2001 * Returns whether or not a containing top level window for the passed
2002 * component is
2003 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2004 *
2005 * @param c a Component which toplevel's to check
2006 * @return {@code true} if the passed component is not null and has a
2007 * containing toplevel window which has opacity less than
2008 * 1.0f (which means that it is translucent), {@code false} otherwise
2009 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2010 */
2011 public static boolean isContainingTopLevelTranslucent(Component c) {
2012 Window w = getContainingWindow(c);
2013 return w != null && ((Window)w).getOpacity() < 1.0f;
2014 }
2015
2016 /**
2017 * Returns whether the native system requires using the peer.updateWindow()
2018 * method to update the contents of a non-opaque window, or if usual
2019 * painting procedures are sufficient. The default return value covers
2020 * the X11 systems. On MS Windows this method is overriden in WToolkit
2021 * to return true.
2022 */
2023 public boolean needUpdateWindow() {
2024 return false;
2025 }
2026
2027 /**
2028 * Descendants of the SunToolkit should override and put their own logic here.
2029 */
2030 public int getNumberOfButtons(){
2031 return 3;
2032 }
2033
2034 /**
2035 * Checks that the given object implements/extends the given
2036 * interface/class.
2037 *
2038 * Note that using the instanceof operator causes a class to be loaded.
2039 * Using this method doesn't load a class and it can be used instead of
2040 * the instanceof operator for performance reasons.
2041 *
2042 * @param obj Object to be checked
2043 * @param type The name of the interface/class. Must be
2044 * fully-qualified interface/class name.
2045 * @return true, if this object implements/extends the given
2046 * interface/class, false, otherwise, or if obj or type is null
2047 */
2048 public static boolean isInstanceOf(Object obj, String type) {
2049 if (obj == null) return false;
2050 if (type == null) return false;
2051
2052 return isInstanceOf(obj.getClass(), type);
2053 }
2054
2055 private static boolean isInstanceOf(Class cls, String type) {
2056 if (cls == null) return false;
2057
2058 if (cls.getName().equals(type)) {
2059 return true;
2060 }
2061
2062 for (Class c : cls.getInterfaces()) {
2063 if (c.getName().equals(type)) {
2064 return true;
2065 }
2066 }
2067 return isInstanceOf(cls.getSuperclass(), type);
2068 }
2069
2070 ///////////////////////////////////////////////////////////////////////////
2071 //
2072 // The following methods help set and identify whether a particular
2073 // AWTEvent object was produced by the system or by user code. As of this
2074 // writing the only consumer is the Java Plug-In, although this information
2075 // could be useful to more clients and probably should be formalized in
2076 // the public API.
2077 //
2078 ///////////////////////////////////////////////////////////////////////////
2079
2080 public static void setSystemGenerated(AWTEvent e) {
2081 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2082 }
2083
2084 public static boolean isSystemGenerated(AWTEvent e) {
2085 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2086 }
2087
2088 } // class SunToolkit
2089
2090
2091 /*
2092 * PostEventQueue is a Thread that runs in the same AppContext as the
2093 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2094 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2095 * events to this queue, which then calls EventQueue.postEvent().
2096 *
2097 * We do this because EventQueue.postEvent() may be overridden by client
2098 * code, and we mustn't ever call client code from the toolkit thread.
2099 */
2100 class PostEventQueue {
2101 private EventQueueItem queueHead = null;
2102 private EventQueueItem queueTail = null;
2103 private final EventQueue eventQueue;
2104
2105 // For the case when queue is cleared but events are not posted
2106 private volatile boolean isFlushing = false;
2107
2108 PostEventQueue(EventQueue eq) {
2109 eventQueue = eq;
2110 }
2111
2112 public synchronized boolean noEvents() {
2113 return queueHead == null && !isFlushing;
2114 }
2115
2116 /*
2117 * Continually post pending AWTEvents to the Java EventQueue. The method
2118 * is synchronized to ensure the flush is completed before a new event
2119 * can be posted to this queue.
2120 *
2121 * 7177040: The method couldn't be wholly synchronized because of calls
2122 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2123 * potentially lead to deadlock
2124 */
2125 public void flush() {
2126 EventQueueItem tempQueue;
2127 synchronized (this) {
2128 tempQueue = queueHead;
2129 queueHead = queueTail = null;
2130 isFlushing = (tempQueue != null);
2131 }
2132 try {
2133 while (tempQueue != null) {
2134 eventQueue.postEvent(tempQueue.event);
2135 tempQueue = tempQueue.next;
2136 }
2137 }
2138 finally {
2139 isFlushing = false;
2140 }
2141 }
2142
2143 /*
2144 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2145 */
2146 void postEvent(AWTEvent event) {
2147 EventQueueItem item = new EventQueueItem(event);
2148
2149 synchronized (this) {
2150 if (queueHead == null) {
2151 queueHead = queueTail = item;
2152 } else {
2153 queueTail.next = item;
2154 queueTail = item;
2155 }
2156 }
2157 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2158 }
2159 } // class PostEventQueue