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 import sun.util.logging.PlatformLogger;
46 import sun.misc.SoftCache;
47 import sun.font.FontDesignMetrics;
48 import sun.awt.im.InputContext;
49 import sun.awt.image.*;
50 import sun.security.action.GetPropertyAction;
51 import sun.security.action.GetBooleanAction;
52 import java.lang.reflect.Field;
53 import java.lang.reflect.Method;
54 import java.lang.reflect.Constructor;
55 import java.lang.reflect.InvocationTargetException;
56 import java.security.AccessController;
57 import java.security.PrivilegedAction;
58 import java.security.PrivilegedActionException;
59 import java.security.PrivilegedExceptionAction;
60
61 public abstract class SunToolkit extends Toolkit
62 implements WindowClosingSupport, WindowClosingListener,
63 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
64
65 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunToolkit");
66
67 /* Load debug settings for native code */
68 static {
69 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
70 DebugSettings.init();
71 }
72 };
73
74 /**
75 * Special mask for the UngrabEvent events, in addition to the
76 * public masks defined in AWTEvent. Should be used as the mask
77 * value for Toolkit.addAWTEventListener.
78 */
79 public static final int GRAB_EVENT_MASK = 0x80000000;
80
81 private static Method wakeupMethod;
82 /* The key to put()/get() the PostEventQueue into/from the AppContext.
83 */
84 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
85
86 /**
87 * Number of buttons.
88 * By default it's taken from the system. If system value does not
89 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
90 */
91 protected static int numberOfButtons = 0;
92
93
94 /* XFree standard mention 24 buttons as maximum:
95 * http://www.xfree86.org/current/mouse.4.html
96 * We workaround systems supporting more than 24 buttons.
97 * Otherwise, we have to use long type values as masks
98 * which leads to API change.
99 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
100 * the 4-bytes limit for the int type. (CR 6799099)
101 * One more bit is reserved for FIRST_HIGH_BIT.
102 */
103 public final static int MAX_BUTTONS_SUPPORTED = 20;
104
105 private static void initEQ(AppContext appContext) {
106 EventQueue eventQueue;
107
108 String eqName = System.getProperty("AWT.EventQueueClass",
109 "java.awt.EventQueue");
110
111 try {
112 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
113 } catch (Exception e) {
114 e.printStackTrace();
115 System.err.println("Failed loading " + eqName + ": " + e);
116 eventQueue = new EventQueue();
117 }
118 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
119
120 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
121 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
122 }
123
124 public SunToolkit() {
125 // 7122796: Always create an EQ for the main AppContext
126 initEQ(AppContext.getMainAppContext());
127 }
128
129 public boolean useBufferPerWindow() {
130 return false;
131 }
132
133 public abstract WindowPeer createWindow(Window target)
134 throws HeadlessException;
135
136 public abstract FramePeer createFrame(Frame target)
137 throws HeadlessException;
138
139 public abstract DialogPeer createDialog(Dialog target)
140 throws HeadlessException;
141
142 public abstract ButtonPeer createButton(Button target)
143 throws HeadlessException;
144
145 public abstract TextFieldPeer createTextField(TextField target)
146 throws HeadlessException;
147
148 public abstract ChoicePeer createChoice(Choice target)
149 throws HeadlessException;
150
151 public abstract LabelPeer createLabel(Label target)
152 throws HeadlessException;
153
154 public abstract ListPeer createList(java.awt.List target)
155 throws HeadlessException;
156
157 public abstract CheckboxPeer createCheckbox(Checkbox target)
158 throws HeadlessException;
159
160 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
161 throws HeadlessException;
162
163 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
164 throws HeadlessException;
165
166 public abstract TextAreaPeer createTextArea(TextArea target)
167 throws HeadlessException;
168
169 public abstract FileDialogPeer createFileDialog(FileDialog target)
170 throws HeadlessException;
171
172 public abstract MenuBarPeer createMenuBar(MenuBar target)
173 throws HeadlessException;
174
175 public abstract MenuPeer createMenu(Menu target)
176 throws HeadlessException;
177
178 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
179 throws HeadlessException;
180
181 public abstract MenuItemPeer createMenuItem(MenuItem target)
182 throws HeadlessException;
183
184 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
185 CheckboxMenuItem target)
186 throws HeadlessException;
187
188 public abstract DragSourceContextPeer createDragSourceContextPeer(
189 DragGestureEvent dge)
190 throws InvalidDnDOperationException;
191
192 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
193 throws HeadlessException, AWTException;
194
195 public abstract SystemTrayPeer createSystemTray(SystemTray target);
196
197 public abstract boolean isTraySupported();
198
199 @SuppressWarnings("deprecation")
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 createKeyboardFocusManagerPeer(KeyboardFocusManager manager)
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 = AccessController.doPrivileged(new PrivilegedAction<Method>() {
317 public Method 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<Object, AppContext> appContextMap =
378 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
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 = 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, boolean isSwingCont)
463 {
464 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager
465 .getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy();
466
467 String toolkitName = Toolkit.getDefaultToolkit().getClass().getName();
468 // if this is not XAWT then use default policy
469 // because Swing change it
470 if (!"sun.awt.X11.XToolkit".equals(toolkitName)) {
471 cont.setFocusTraversalPolicy(defaultPolicy);
472 return;
473 }
474
475 String policyName = defaultPolicy.getClass().getName();
476
477 if (DefaultFocusTraversalPolicy.class != defaultPolicy.getClass()) {
478 // Policy was changed
479 // Check if it is awt policy or swing policy
480 // If it is Swing policy we shouldn't use it in AWT frames
481 // If it is AWT policy we shouldn't use it in Swing frames
482 // Otherwise we should use this policy
483 if (policyName.startsWith("java.awt.")) {
484 // AWT
485 if (isSwingCont) {
486 // Can't use AWT policy in Swing windows - should use Swing's one.
487 defaultPolicy = createLayoutPolicy();
488 } else {
489 // New awt policy.
490 }
491 } else if (policyName.startsWith("javax.swing.")) {
492 if (isSwingCont) {
493 // New Swing's policy
494 } else {
495 defaultPolicy = new DefaultFocusTraversalPolicy();
496 }
497 }
498 } else {
499 // Policy is default, use different default policy for swing
500 if (isSwingCont) {
501 defaultPolicy = createLayoutPolicy();
502 }
503 }
504 cont.setFocusTraversalPolicy(defaultPolicy);
505 }
506
507 private static FocusTraversalPolicy createLayoutPolicy() {
508 FocusTraversalPolicy policy = null;
509 try {
510 Class<?> layoutPolicyClass =
511 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
512 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
513 }
514 catch (ClassNotFoundException e) {
515 assert false;
516 }
517 catch (InstantiationException e) {
518 assert false;
519 }
520 catch (IllegalAccessException e) {
521 assert false;
522 }
523
524 return policy;
525 }
526
527 /*
528 * Insert a mapping from target to AppContext, for later retrieval
529 * via targetToAppContext() above.
530 */
531 public static void insertTargetMapping(Object target, AppContext appContext) {
532 if (!GraphicsEnvironment.isHeadless()) {
533 if (!setAppContext(target, appContext)) {
534 // Target is not a Component/MenuComponent, use the private Map
535 // instead.
536 appContextMap.put(target, appContext);
537 }
538 }
539 }
540
541 /*
542 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
543 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
544 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
545 * not be called under another lock since it locks the EventQueue.
546 * See bugids 4632918, 4526597.
547 */
548 public static void postEvent(AppContext appContext, AWTEvent event) {
549 if (event == null) {
550 throw new NullPointerException();
551 }
552 // All events posted via this method are system-generated.
553 // Placing the following call here reduces considerably the
554 // number of places throughout the toolkit that would
555 // otherwise have to be modified to precisely identify
556 // system-generated events.
557 setSystemGenerated(event);
558 AppContext eventContext = targetToAppContext(event.getSource());
559 if (eventContext != null && !eventContext.equals(appContext)) {
560 log.fine("Event posted on wrong app context : " + event);
561 }
562 PostEventQueue postEventQueue =
563 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
564 if (postEventQueue != null) {
565 postEventQueue.postEvent(event);
566 }
567 }
568
569 /*
570 * Post AWTEvent of high priority.
571 */
572 public static void postPriorityEvent(final AWTEvent e) {
573 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
574 public void run() {
575 AWTAccessor.getAWTEventAccessor().setPosted(e);
576 ((Component)e.getSource()).dispatchEvent(e);
577 }
578 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
579 postEvent(targetToAppContext(e.getSource()), pe);
580 }
581
582 protected static final Lock flushLock = new ReentrantLock();
583 private static boolean isFlushingPendingEvents = false;
584
585 /*
586 * Flush any pending events which haven't been posted to the AWT
587 * EventQueue yet.
588 */
589 public static void flushPendingEvents() {
590 flushLock.lock();
591 try {
592 // Don't call flushPendingEvents() recursively
593 if (!isFlushingPendingEvents) {
594 isFlushingPendingEvents = true;
595 AppContext appContext = AppContext.getAppContext();
596 PostEventQueue postEventQueue =
597 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
598 if (postEventQueue != null) {
599 postEventQueue.flush();
600 }
601 }
602 } finally {
603 isFlushingPendingEvents = false;
604 flushLock.unlock();
605 }
606 }
607
608 public static boolean isPostEventQueueEmpty() {
609 AppContext appContext = AppContext.getAppContext();
610 PostEventQueue postEventQueue =
611 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
612 if (postEventQueue != null) {
613 return postEventQueue.noEvents();
614 } else {
615 return true;
616 }
617 }
618
619 /*
620 * Execute a chunk of code on the Java event handler thread for the
621 * given target. Does not wait for the execution to occur before
622 * returning to the caller.
623 */
624 public static void executeOnEventHandlerThread(Object target,
625 Runnable runnable) {
626 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
627 }
628
629 /*
630 * Fixed 5064013: the InvocationEvent time should be equals
631 * the time of the ActionEvent
632 */
633 @SuppressWarnings("serial")
634 public static void executeOnEventHandlerThread(Object target,
635 Runnable runnable,
636 final long when) {
637 executeOnEventHandlerThread(
638 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
639 public long getWhen() {
640 return when;
641 }
642 });
643 }
644
645 /*
646 * Execute a chunk of code on the Java event handler thread for the
647 * given target. Does not wait for the execution to occur before
648 * returning to the caller.
649 */
650 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
651 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
652 }
653
654 /*
655 * Execute a chunk of code on the Java event handler thread. The
656 * method takes into account provided AppContext and sets
657 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
658 * event. See 6451487 for detailes.
659 * Does not wait for the execution to occur before returning to
660 * the caller.
661 */
662 public static void invokeLaterOnAppContext(
663 AppContext appContext, Runnable dispatcher)
664 {
665 postEvent(appContext,
666 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
667 PeerEvent.PRIORITY_EVENT));
668 }
669
670 /*
671 * Execute a chunk of code on the Java event handler thread for the
672 * given target. Waits for the execution to occur before returning
673 * to the caller.
674 */
675 public static void executeOnEDTAndWait(Object target, Runnable runnable)
676 throws InterruptedException, InvocationTargetException
677 {
678 if (EventQueue.isDispatchThread()) {
679 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
680 }
681
682 class AWTInvocationLock {}
683 Object lock = new AWTInvocationLock();
684
685 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
686
687 synchronized (lock) {
688 executeOnEventHandlerThread(event);
689 while(!event.isDispatched()) {
690 lock.wait();
691 }
692 }
693
694 Throwable eventThrowable = event.getThrowable();
695 if (eventThrowable != null) {
696 throw new InvocationTargetException(eventThrowable);
697 }
698 }
699
700 /*
701 * Returns true if the calling thread is the event dispatch thread
702 * contained within AppContext which associated with the given target.
703 * Use this call to ensure that a given task is being executed
704 * (or not being) on the event dispatch thread for the given target.
705 */
706 public static boolean isDispatchThreadForAppContext(Object target) {
707 AppContext appContext = targetToAppContext(target);
708 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
709
710 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
711 return accessor.isDispatchThreadImpl(eq);
712 }
713
714 public Dimension getScreenSize() {
715 return new Dimension(getScreenWidth(), getScreenHeight());
716 }
717 protected abstract int getScreenWidth();
718 protected abstract int getScreenHeight();
719
720 @SuppressWarnings("deprecation")
721 public FontMetrics getFontMetrics(Font font) {
722 return FontDesignMetrics.getMetrics(font);
723 }
724
725 @SuppressWarnings("deprecation")
726 public String[] getFontList() {
727 String[] hardwiredFontList = {
728 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
729 Font.DIALOG_INPUT
730
731 // -- Obsolete font names from 1.0.2. It was decided that
732 // -- getFontList should not return these old names:
733 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
734 };
735 return hardwiredFontList;
736 }
737
738 public PanelPeer createPanel(Panel target) {
739 return (PanelPeer)createComponent(target);
740 }
741
742 public CanvasPeer createCanvas(Canvas target) {
743 return (CanvasPeer)createComponent(target);
744 }
745
746 /**
747 * Disables erasing of background on the canvas before painting if
748 * this is supported by the current toolkit. It is recommended to
749 * call this method early, before the Canvas becomes displayable,
750 * because some Toolkit implementations do not support changing
751 * this property once the Canvas becomes displayable.
752 */
753 public void disableBackgroundErase(Canvas canvas) {
754 disableBackgroundEraseImpl(canvas);
755 }
756
757 /**
758 * Disables the native erasing of the background on the given
759 * component before painting if this is supported by the current
760 * toolkit. This only has an effect for certain components such as
761 * Canvas, Panel and Window. It is recommended to call this method
762 * early, before the Component becomes displayable, because some
763 * Toolkit implementations do not support changing this property
764 * once the Component becomes displayable.
765 */
766 public void disableBackgroundErase(Component component) {
767 disableBackgroundEraseImpl(component);
768 }
769
770 private void disableBackgroundEraseImpl(Component component) {
771 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
772 }
773
774 /**
775 * Returns the value of "sun.awt.noerasebackground" property. Default
776 * value is {@code false}.
777 */
778 public static boolean getSunAwtNoerasebackground() {
779 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
780 }
781
782 /**
783 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
784 * value is {@code false}.
785 */
786 public static boolean getSunAwtErasebackgroundonresize() {
787 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
788 }
789
790
791 static final SoftCache imgCache = new SoftCache();
792
793 static Image getImageFromHash(Toolkit tk, URL url) {
794 SecurityManager sm = System.getSecurityManager();
795 if (sm != null) {
796 try {
797 java.security.Permission perm =
798 url.openConnection().getPermission();
799 if (perm != null) {
800 try {
801 sm.checkPermission(perm);
802 } catch (SecurityException se) {
803 // fallback to checkRead/checkConnect for pre 1.2
804 // security managers
805 if ((perm instanceof java.io.FilePermission) &&
806 perm.getActions().indexOf("read") != -1) {
807 sm.checkRead(perm.getName());
808 } else if ((perm instanceof
809 java.net.SocketPermission) &&
810 perm.getActions().indexOf("connect") != -1) {
811 sm.checkConnect(url.getHost(), url.getPort());
812 } else {
813 throw se;
814 }
815 }
816 }
817 } catch (java.io.IOException ioe) {
818 sm.checkConnect(url.getHost(), url.getPort());
819 }
820 }
821 synchronized (imgCache) {
822 Image img = (Image)imgCache.get(url);
823 if (img == null) {
824 try {
825 img = tk.createImage(new URLImageSource(url));
826 imgCache.put(url, img);
827 } catch (Exception e) {
828 }
829 }
830 return img;
831 }
832 }
833
834 static Image getImageFromHash(Toolkit tk,
835 String filename) {
836 SecurityManager security = System.getSecurityManager();
837 if (security != null) {
838 security.checkRead(filename);
839 }
840 synchronized (imgCache) {
841 Image img = (Image)imgCache.get(filename);
842 if (img == null) {
843 try {
844 img = tk.createImage(new FileImageSource(filename));
845 imgCache.put(filename, img);
846 } catch (Exception e) {
847 }
848 }
849 return img;
850 }
851 }
852
853 public Image getImage(String filename) {
854 return getImageFromHash(this, filename);
855 }
856
857 public Image getImage(URL url) {
858 return getImageFromHash(this, url);
859 }
860
861 public Image createImage(String filename) {
862 SecurityManager security = System.getSecurityManager();
863 if (security != null) {
864 security.checkRead(filename);
865 }
866 return createImage(new FileImageSource(filename));
867 }
868
869 public Image createImage(URL url) {
870 SecurityManager sm = System.getSecurityManager();
871 if (sm != null) {
872 try {
873 java.security.Permission perm =
874 url.openConnection().getPermission();
875 if (perm != null) {
876 try {
877 sm.checkPermission(perm);
878 } catch (SecurityException se) {
879 // fallback to checkRead/checkConnect for pre 1.2
880 // security managers
881 if ((perm instanceof java.io.FilePermission) &&
882 perm.getActions().indexOf("read") != -1) {
883 sm.checkRead(perm.getName());
884 } else if ((perm instanceof
885 java.net.SocketPermission) &&
886 perm.getActions().indexOf("connect") != -1) {
887 sm.checkConnect(url.getHost(), url.getPort());
888 } else {
889 throw se;
890 }
891 }
892 }
893 } catch (java.io.IOException ioe) {
894 sm.checkConnect(url.getHost(), url.getPort());
895 }
896 }
897 return createImage(new URLImageSource(url));
898 }
899
900 public Image createImage(byte[] data, int offset, int length) {
901 return createImage(new ByteArrayImageSource(data, offset, length));
902 }
903
904 public Image createImage(ImageProducer producer) {
905 return new ToolkitImage(producer);
906 }
907
908 public int checkImage(Image img, int w, int h, ImageObserver o) {
909 if (!(img instanceof ToolkitImage)) {
910 return ImageObserver.ALLBITS;
911 }
912
913 ToolkitImage tkimg = (ToolkitImage)img;
914 int repbits;
915 if (w == 0 || h == 0) {
916 repbits = ImageObserver.ALLBITS;
917 } else {
918 repbits = tkimg.getImageRep().check(o);
919 }
920 return tkimg.check(o) | repbits;
921 }
922
923 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
924 if (w == 0 || h == 0) {
925 return true;
926 }
927
928 // Must be a ToolkitImage
929 if (!(img instanceof ToolkitImage)) {
930 return true;
931 }
932
933 ToolkitImage tkimg = (ToolkitImage)img;
934 if (tkimg.hasError()) {
935 if (o != null) {
936 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
937 -1, -1, -1, -1);
938 }
939 return false;
940 }
941 ImageRepresentation ir = tkimg.getImageRep();
942 return ir.prepare(o);
943 }
944
945 /**
946 * Scans {@code imageList} for best-looking image of specified dimensions.
947 * Image can be scaled and/or padded with transparency.
948 */
949 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
950 if (width == 0 || height == 0) {
951 return null;
952 }
953 Image bestImage = null;
954 int bestWidth = 0;
955 int bestHeight = 0;
956 double bestSimilarity = 3; //Impossibly high value
957 double bestScaleFactor = 0;
958 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
959 //Iterate imageList looking for best matching image.
960 //'Similarity' measure is defined as good scale factor and small insets.
961 //best possible similarity is 0 (no scale, no insets).
962 //It's found while the experiments that good-looking result is achieved
963 //with scale factors x1, x3/4, x2/3, xN, x1/N.
964 Image im = i.next();
965 if (im == null) {
966 if (log.isLoggable(PlatformLogger.FINER)) {
967 log.finer("SunToolkit.getScaledIconImage: " +
968 "Skipping the image passed into Java because it's null.");
969 }
970 continue;
971 }
972 if (im instanceof ToolkitImage) {
973 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
974 ir.reconstruct(ImageObserver.ALLBITS);
975 }
976 int iw;
977 int ih;
978 try {
979 iw = im.getWidth(null);
980 ih = im.getHeight(null);
981 } catch (Exception e){
982 if (log.isLoggable(PlatformLogger.FINER)) {
983 log.finer("SunToolkit.getScaledIconImage: " +
984 "Perhaps the image passed into Java is broken. Skipping this icon.");
985 }
986 continue;
987 }
988 if (iw > 0 && ih > 0) {
989 //Calc scale factor
990 double scaleFactor = Math.min((double)width / (double)iw,
991 (double)height / (double)ih);
992 //Calculate scaled image dimensions
993 //adjusting scale factor to nearest "good" value
994 int adjw = 0;
995 int adjh = 0;
996 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
997 if (scaleFactor >= 2) {
998 //Need to enlarge image more than twice
999 //Round down scale factor to multiply by integer value
1000 scaleFactor = Math.floor(scaleFactor);
1001 adjw = iw * (int)scaleFactor;
1002 adjh = ih * (int)scaleFactor;
1003 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1004 } else if (scaleFactor >= 1) {
1005 //Don't scale
1006 scaleFactor = 1.0;
1007 adjw = iw;
1008 adjh = ih;
1009 scaleMeasure = 0;
1010 } else if (scaleFactor >= 0.75) {
1011 //Multiply by 3/4
1012 scaleFactor = 0.75;
1013 adjw = iw * 3 / 4;
1014 adjh = ih * 3 / 4;
1015 scaleMeasure = 0.3;
1016 } else if (scaleFactor >= 0.6666) {
1017 //Multiply by 2/3
1018 scaleFactor = 0.6666;
1019 adjw = iw * 2 / 3;
1020 adjh = ih * 2 / 3;
1021 scaleMeasure = 0.33;
1022 } else {
1023 //Multiply size by 1/scaleDivider
1024 //where scaleDivider is minimum possible integer
1025 //larger than 1/scaleFactor
1026 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1027 scaleFactor = 1.0 / scaleDivider;
1028 adjw = (int)Math.round((double)iw / scaleDivider);
1029 adjh = (int)Math.round((double)ih / scaleDivider);
1030 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1031 }
1032 double similarity = ((double)width - (double)adjw) / (double)width +
1033 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1034 scaleMeasure; //Large rescale is bad
1035 if (similarity < bestSimilarity) {
1036 bestSimilarity = similarity;
1037 bestScaleFactor = scaleFactor;
1038 bestImage = im;
1039 bestWidth = adjw;
1040 bestHeight = adjh;
1041 }
1042 if (similarity == 0) break;
1043 }
1044 }
1045 if (bestImage == null) {
1046 //No images were found, possibly all are broken
1047 return null;
1048 }
1049 BufferedImage bimage =
1050 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1051 Graphics2D g = bimage.createGraphics();
1052 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1053 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1054 try {
1055 int x = (width - bestWidth) / 2;
1056 int y = (height - bestHeight) / 2;
1057 if (log.isLoggable(PlatformLogger.FINER)) {
1058 log.finer("WWindowPeer.getScaledIconData() result : " +
1059 "w : " + width + " h : " + height +
1060 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1061 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1062 " adjW : " + bestWidth + " adjH : " + bestHeight +
1063 " x : " + x + " y : " + y);
1064 }
1065 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1066 } finally {
1067 g.dispose();
1068 }
1069 return bimage;
1070 }
1071
1072 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1073 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1074 if (bimage == null) {
1075 if (log.isLoggable(PlatformLogger.FINER)) {
1076 log.finer("SunToolkit.getScaledIconData: " +
1077 "Perhaps the image passed into Java is broken. Skipping this icon.");
1078 }
1079 return null;
1080 }
1081 Raster raster = bimage.getRaster();
1082 DataBuffer buffer = raster.getDataBuffer();
1083 return (DataBufferInt)buffer;
1084 }
1085
1086 protected EventQueue getSystemEventQueueImpl() {
1087 return getSystemEventQueueImplPP();
1088 }
1089
1090 // Package private implementation
1091 static EventQueue getSystemEventQueueImplPP() {
1092 return getSystemEventQueueImplPP(AppContext.getAppContext());
1093 }
1094
1095 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1096 EventQueue theEventQueue =
1097 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1098 return theEventQueue;
1099 }
1100
1101 /**
1102 * Give native peers the ability to query the native container
1103 * given a native component (eg the direct parent may be lightweight).
1104 */
1105 public static Container getNativeContainer(Component c) {
1106 return Toolkit.getNativeContainer(c);
1107 }
1108
1109 /**
1110 * Gives native peers the ability to query the closest HW component.
1111 * If the given component is heavyweight, then it returns this. Otherwise,
1112 * it goes one level up in the hierarchy and tests next component.
1113 */
1114 public static Component getHeavyweightComponent(Component c) {
1115 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1116 c = AWTAccessor.getComponentAccessor().getParent(c);
1117 }
1118 return c;
1119 }
1120
1121 /**
1122 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1123 */
1124 public int getFocusAcceleratorKeyMask() {
1125 return InputEvent.ALT_MASK;
1126 }
1127
1128 /**
1129 * Tests whether specified key modifiers mask can be used to enter a printable
1130 * character. This is a default implementation of this method, which reflects
1131 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1132 * characters from the extended character set (like euro sign or math symbols)
1133 */
1134 public boolean isPrintableCharacterModifiersMask(int mods) {
1135 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1136 }
1137
1138 /**
1139 * Returns a new input method window, with behavior as specified in
1140 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1141 * If the inputContext is not null, the window should return it from its
1142 * getInputContext() method. The window needs to implement
1143 * sun.awt.im.InputMethodWindow.
1144 * <p>
1145 * SunToolkit subclasses can override this method to return better input
1146 * method windows.
1147 */
1148 public Window createInputMethodWindow(String title, InputContext context) {
1149 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1150 }
1151
1152 /**
1153 * Returns whether enableInputMethods should be set to true for peered
1154 * TextComponent instances on this platform. False by default.
1155 */
1156 public boolean enableInputMethodsForTextComponent() {
1157 return false;
1158 }
1159
1160 private static Locale startupLocale = null;
1161
1162 /**
1163 * Returns the locale in which the runtime was started.
1164 */
1165 public static Locale getStartupLocale() {
1166 if (startupLocale == null) {
1167 String language, region, country, variant;
1168 language = AccessController.doPrivileged(
1169 new GetPropertyAction("user.language", "en"));
1170 // for compatibility, check for old user.region property
1171 region = AccessController.doPrivileged(
1172 new GetPropertyAction("user.region"));
1173 if (region != null) {
1174 // region can be of form country, country_variant, or _variant
1175 int i = region.indexOf('_');
1176 if (i >= 0) {
1177 country = region.substring(0, i);
1178 variant = region.substring(i + 1);
1179 } else {
1180 country = region;
1181 variant = "";
1182 }
1183 } else {
1184 country = AccessController.doPrivileged(
1185 new GetPropertyAction("user.country", ""));
1186 variant = AccessController.doPrivileged(
1187 new GetPropertyAction("user.variant", ""));
1188 }
1189 startupLocale = new Locale(language, country, variant);
1190 }
1191 return startupLocale;
1192 }
1193
1194 /**
1195 * Returns the default keyboard locale of the underlying operating system
1196 */
1197 public Locale getDefaultKeyboardLocale() {
1198 return getStartupLocale();
1199 }
1200
1201 private static String dataTransfererClassName = null;
1202
1203 protected static void setDataTransfererClassName(String className) {
1204 dataTransfererClassName = className;
1205 }
1206
1207 public static String getDataTransfererClassName() {
1208 if (dataTransfererClassName == null) {
1209 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1210 }
1211 return dataTransfererClassName;
1212 }
1213
1214 // Support for window closing event notifications
1215 private transient WindowClosingListener windowClosingListener = null;
1216 /**
1217 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1218 */
1219 public WindowClosingListener getWindowClosingListener() {
1220 return windowClosingListener;
1221 }
1222 /**
1223 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1224 */
1225 public void setWindowClosingListener(WindowClosingListener wcl) {
1226 windowClosingListener = wcl;
1227 }
1228
1229 /**
1230 * @see sun.awt.WindowClosingListener#windowClosingNotify
1231 */
1232 public RuntimeException windowClosingNotify(WindowEvent event) {
1233 if (windowClosingListener != null) {
1234 return windowClosingListener.windowClosingNotify(event);
1235 } else {
1236 return null;
1237 }
1238 }
1239 /**
1240 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1241 */
1242 public RuntimeException windowClosingDelivered(WindowEvent event) {
1243 if (windowClosingListener != null) {
1244 return windowClosingListener.windowClosingDelivered(event);
1245 } else {
1246 return null;
1247 }
1248 }
1249
1250 private static DefaultMouseInfoPeer mPeer = null;
1251
1252 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1253 if (mPeer == null) {
1254 mPeer = new DefaultMouseInfoPeer();
1255 }
1256 return mPeer;
1257 }
1258
1259
1260 /**
1261 * Returns whether default toolkit needs the support of the xembed
1262 * from embedding host(if any).
1263 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1264 */
1265 public static boolean needsXEmbed() {
1266 String noxembed = AccessController.
1267 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1268 if ("true".equals(noxembed)) {
1269 return false;
1270 }
1271
1272 Toolkit tk = Toolkit.getDefaultToolkit();
1273 if (tk instanceof SunToolkit) {
1274 // SunToolkit descendants should override this method to specify
1275 // concrete behavior
1276 return ((SunToolkit)tk).needsXEmbedImpl();
1277 } else {
1278 // Non-SunToolkit doubtly might support XEmbed
1279 return false;
1280 }
1281 }
1282
1283 /**
1284 * Returns whether this toolkit needs the support of the xembed
1285 * from embedding host(if any).
1286 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1287 */
1288 protected boolean needsXEmbedImpl() {
1289 return false;
1290 }
1291
1292 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1293
1294 /**
1295 * Returns whether the XEmbed server feature is requested by
1296 * developer. If true, Toolkit should return an
1297 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1298 */
1299 protected final boolean isXEmbedServerRequested() {
1300 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1301 }
1302
1303 /**
1304 * Returns whether the modal exclusion API is supported by the current toolkit.
1305 * When it isn't supported, calling <code>setModalExcluded</code> has no
1306 * effect, and <code>isModalExcluded</code> returns false for all windows.
1307 *
1308 * @return true if modal exclusion is supported by the toolkit, false otherwise
1309 *
1310 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1311 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1312 *
1313 * @since 1.5
1314 */
1315 public static boolean isModalExcludedSupported()
1316 {
1317 Toolkit tk = Toolkit.getDefaultToolkit();
1318 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1319 }
1320 /*
1321 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1322 *
1323 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1324 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1325 *
1326 * @since 1.5
1327 */
1328 protected boolean isModalExcludedSupportedImpl()
1329 {
1330 return false;
1331 }
1332
1333 /*
1334 * Sets this window to be excluded from being modally blocked. When the
1335 * toolkit supports modal exclusion and this method is called, input
1336 * events, focus transfer and z-order will continue to work for the
1337 * window, it's owned windows and child components, even in the
1338 * presence of a modal dialog.
1339 * For details on which <code>Window</code>s are normally blocked
1340 * by modal dialog, see {@link java.awt.Dialog}.
1341 * Invoking this method when the modal exclusion API is not supported by
1342 * the current toolkit has no effect.
1343 * @param window Window to be marked as not modally blocked
1344 * @see java.awt.Dialog
1345 * @see java.awt.Dialog#setModal(boolean)
1346 * @see sun.awt.SunToolkit#isModalExcludedSupported
1347 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1348 */
1349 public static void setModalExcluded(Window window)
1350 {
1351 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1352 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1353 }
1354 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1355 }
1356
1357 /*
1358 * Returns whether the specified window is blocked by modal dialogs.
1359 * If the modal exclusion API isn't supported by the current toolkit,
1360 * it returns false for all windows.
1361 *
1362 * @param window Window to test for modal exclusion
1363 *
1364 * @return true if the window is modal excluded, false otherwise. If
1365 * the modal exclusion isn't supported by the current Toolkit, false
1366 * is returned
1367 *
1368 * @see sun.awt.SunToolkit#isModalExcludedSupported
1369 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1370 *
1371 * @since 1.5
1372 */
1373 public static boolean isModalExcluded(Window window)
1374 {
1375 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1376 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1377 }
1378 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1379 }
1380
1381 /**
1382 * Overridden in XToolkit and WToolkit
1383 */
1384 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1385 return (modalityType == Dialog.ModalityType.MODELESS) ||
1386 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1387 }
1388
1389 /**
1390 * Overridden in XToolkit and WToolkit
1391 */
1392 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1393 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1394 }
1395
1396 ///////////////////////////////////////////////////////////////////////////
1397 //
1398 // The following is used by the Java Plug-in to coordinate dialog modality
1399 // between containing applications (browsers, ActiveX containers etc) and
1400 // the AWT.
1401 //
1402 ///////////////////////////////////////////////////////////////////////////
1403
1404 private ModalityListenerList modalityListeners = new ModalityListenerList();
1405
1406 public void addModalityListener(ModalityListener listener) {
1407 modalityListeners.add(listener);
1408 }
1409
1410 public void removeModalityListener(ModalityListener listener) {
1411 modalityListeners.remove(listener);
1412 }
1413
1414 public void notifyModalityPushed(Dialog dialog) {
1415 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1416 }
1417
1418 public void notifyModalityPopped(Dialog dialog) {
1419 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1420 }
1421
1422 final void notifyModalityChange(int id, Dialog source) {
1423 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1424 ev.dispatch();
1425 }
1426
1427 static class ModalityListenerList implements ModalityListener {
1428
1429 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1430
1431 void add(ModalityListener listener) {
1432 listeners.addElement(listener);
1433 }
1434
1435 void remove(ModalityListener listener) {
1436 listeners.removeElement(listener);
1437 }
1438
1439 public void modalityPushed(ModalityEvent ev) {
1440 Iterator<ModalityListener> it = listeners.iterator();
1441 while (it.hasNext()) {
1442 it.next().modalityPushed(ev);
1443 }
1444 }
1445
1446 public void modalityPopped(ModalityEvent ev) {
1447 Iterator<ModalityListener> it = listeners.iterator();
1448 while (it.hasNext()) {
1449 it.next().modalityPopped(ev);
1450 }
1451 }
1452 } // end of class ModalityListenerList
1453
1454 ///////////////////////////////////////////////////////////////////////////
1455 // End Plug-in code
1456 ///////////////////////////////////////////////////////////////////////////
1457
1458 public static boolean isLightweightOrUnknown(Component comp) {
1459 if (comp.isLightweight()
1460 || !(getDefaultToolkit() instanceof SunToolkit))
1461 {
1462 return true;
1463 }
1464 return !(comp instanceof Button
1465 || comp instanceof Canvas
1466 || comp instanceof Checkbox
1467 || comp instanceof Choice
1468 || comp instanceof Label
1469 || comp instanceof java.awt.List
1470 || comp instanceof Panel
1471 || comp instanceof Scrollbar
1472 || comp instanceof ScrollPane
1473 || comp instanceof TextArea
1474 || comp instanceof TextField
1475 || comp instanceof Window);
1476 }
1477
1478 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) {
1479 Method res = null;
1480 try {
1481 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1482 public Method run() throws Exception {
1483 Method m = clz.getDeclaredMethod(methodName, params);
1484 m.setAccessible(true);
1485 return m;
1486 }
1487 });
1488 } catch (PrivilegedActionException ex) {
1489 ex.printStackTrace();
1490 }
1491 return res;
1492 }
1493
1494 @SuppressWarnings("serial")
1495 public static class OperationTimedOut extends RuntimeException {
1496 public OperationTimedOut(String msg) {
1497 super(msg);
1498 }
1499 public OperationTimedOut() {
1500 }
1501 }
1502
1503 @SuppressWarnings("serial")
1504 public static class InfiniteLoop extends RuntimeException {
1505 }
1506
1507 @SuppressWarnings("serial")
1508 public static class IllegalThreadException extends RuntimeException {
1509 public IllegalThreadException(String msg) {
1510 super(msg);
1511 }
1512 public IllegalThreadException() {
1513 }
1514 }
1515
1516 public static final int DEFAULT_WAIT_TIME = 10000;
1517 private static final int MAX_ITERS = 20;
1518 private static final int MIN_ITERS = 0;
1519 private static final int MINIMAL_EDELAY = 0;
1520
1521 /**
1522 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1523 */
1524 public void realSync() throws OperationTimedOut, InfiniteLoop {
1525 realSync(DEFAULT_WAIT_TIME);
1526 }
1527
1528 /**
1529 * Forces toolkit to synchronize with the native windowing
1530 * sub-system, flushing all pending work and waiting for all the
1531 * events to be processed. This method guarantees that after
1532 * return no additional Java events will be generated, unless
1533 * cause by user. Obviously, the method cannot be used on the
1534 * event dispatch thread (EDT). In case it nevertheless gets
1535 * invoked on this thread, the method throws the
1536 * IllegalThreadException runtime exception.
1537 *
1538 * <p> This method allows to write tests without explicit timeouts
1539 * or wait for some event. Example:
1540 * <code>
1541 * Frame f = ...;
1542 * f.setVisible(true);
1543 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1544 * </code>
1545 *
1546 * <p> After realSync, <code>f</code> will be completely visible
1547 * on the screen, its getLocationOnScreen will be returning the
1548 * right result and it will be the focus owner.
1549 *
1550 * <p> Another example:
1551 * <code>
1552 * b.requestFocus();
1553 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1554 * </code>
1555 *
1556 * <p> After realSync, <code>b</code> will be focus owner.
1557 *
1558 * <p> Notice that realSync isn't guaranteed to work if recurring
1559 * actions occur, such as if during processing of some event
1560 * another request which may generate some events occurs. By
1561 * default, sync tries to perform as much as {@value MAX_ITERS}
1562 * cycles of event processing, allowing for roughly {@value
1563 * MAX_ITERS} additional requests.
1564 *
1565 * <p> For example, requestFocus() generates native request, which
1566 * generates one or two Java focus events, which then generate a
1567 * serie of paint events, a serie of Java focus events, which then
1568 * generate a serie of paint events which then are processed -
1569 * three cycles, minimum.
1570 *
1571 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1572 */
1573 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1574 {
1575 if (EventQueue.isDispatchThread()) {
1576 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1577 }
1578 int bigLoop = 0;
1579 do {
1580 // Let's do sync first
1581 sync();
1582
1583 // During the wait process, when we were processing incoming
1584 // events, we could have made some new request, which can
1585 // generate new events. Example: MapNotify/XSetInputFocus.
1586 // Therefore, we dispatch them as long as there is something
1587 // to dispatch.
1588 int iters = 0;
1589 while (iters < MIN_ITERS) {
1590 syncNativeQueue(timeout);
1591 iters++;
1592 }
1593 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1594 iters++;
1595 }
1596 if (iters >= MAX_ITERS) {
1597 throw new InfiniteLoop();
1598 }
1599
1600 // native requests were dispatched by X/Window Manager or Windows
1601 // Moreover, we processed them all on Toolkit thread
1602 // Now wait while EDT processes them.
1603 //
1604 // During processing of some events (focus, for example),
1605 // some other events could have been generated. So, after
1606 // waitForIdle, we may end up with full EventQueue
1607 iters = 0;
1608 while (iters < MIN_ITERS) {
1609 waitForIdle(timeout);
1610 iters++;
1611 }
1612 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1613 iters++;
1614 }
1615 if (iters >= MAX_ITERS) {
1616 throw new InfiniteLoop();
1617 }
1618
1619 bigLoop++;
1620 // Again, for Java events, it was simple to check for new Java
1621 // events by checking event queue, but what if Java events
1622 // resulted in native requests? Therefor, check native events again.
1623 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1624 }
1625
1626 /**
1627 * Platform toolkits need to implement this method to perform the
1628 * sync of the native queue. The method should wait until native
1629 * requests are processed, all native events are processed and
1630 * corresponding Java events are generated. Should return
1631 * <code>true</code> if some events were processed,
1632 * <code>false</code> otherwise.
1633 */
1634 protected abstract boolean syncNativeQueue(final long timeout);
1635
1636 private boolean eventDispatched = false;
1637 private boolean queueEmpty = false;
1638 private final Object waitLock = "Wait Lock";
1639
1640 static Method eqNoEvents;
1641
1642 private boolean isEQEmpty() {
1643 EventQueue queue = getSystemEventQueueImpl();
1644 synchronized(SunToolkit.class) {
1645 if (eqNoEvents == null) {
1646 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1647 }
1648 }
1649 try {
1650 return (Boolean)eqNoEvents.invoke(queue);
1651 } catch (Exception e) {
1652 e.printStackTrace();
1653 return false;
1654 }
1655 }
1656
1657 /**
1658 * Waits for the Java event queue to empty. Ensures that all
1659 * events are processed (including paint events), and that if
1660 * recursive events were generated, they are also processed.
1661 * Should return <code>true</code> if more processing is
1662 * necessary, <code>false</code> otherwise.
1663 */
1664 @SuppressWarnings("serial")
1665 protected final boolean waitForIdle(final long timeout) {
1666 flushPendingEvents();
1667 boolean queueWasEmpty = isEQEmpty();
1668 queueEmpty = false;
1669 eventDispatched = false;
1670 synchronized(waitLock) {
1671 postEvent(AppContext.getAppContext(),
1672 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1673 public void dispatch() {
1674 // Here we block EDT. It could have some
1675 // events, it should have dispatched them by
1676 // now. So native requests could have been
1677 // generated. First, dispatch them. Then,
1678 // flush Java events again.
1679 int iters = 0;
1680 while (iters < MIN_ITERS) {
1681 syncNativeQueue(timeout);
1682 iters++;
1683 }
1684 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1685 iters++;
1686 }
1687 flushPendingEvents();
1688
1689 synchronized(waitLock) {
1690 queueEmpty = isEQEmpty();
1691 eventDispatched = true;
1692 waitLock.notifyAll();
1693 }
1694 }
1695 });
1696 try {
1697 while (!eventDispatched) {
1698 waitLock.wait();
1699 }
1700 } catch (InterruptedException ie) {
1701 return false;
1702 }
1703 }
1704
1705 try {
1706 Thread.sleep(MINIMAL_EDELAY);
1707 } catch (InterruptedException ie) {
1708 throw new RuntimeException("Interrupted");
1709 }
1710
1711 flushPendingEvents();
1712
1713 // Lock to force write-cache flush for queueEmpty.
1714 synchronized (waitLock) {
1715 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1716 }
1717 }
1718
1719 /**
1720 * Grabs the mouse input for the given window. The window must be
1721 * visible. The window or its children do not receive any
1722 * additional mouse events besides those targeted to them. All
1723 * other events will be dispatched as before - to the respective
1724 * targets. This Window will receive UngrabEvent when automatic
1725 * ungrab is about to happen. The event can be listened to by
1726 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1727 * UngrabEvent class for the list of conditions when ungrab is
1728 * about to happen.
1729 * @see UngrabEvent
1730 */
1731 public abstract void grab(Window w);
1732
1733 /**
1734 * Forces ungrab. No event will be sent.
1735 */
1736 public abstract void ungrab(Window w);
1737
1738
1739 /**
1740 * Locates the splash screen library in a platform dependent way and closes
1741 * the splash screen. Should be invoked on first top-level frame display.
1742 * @see java.awt.SplashScreen
1743 * @since 1.6
1744 */
1745 public static native void closeSplashScreen();
1746
1747 /* The following methods and variables are to support retrieving
1748 * desktop text anti-aliasing settings
1749 */
1750
1751 /* Need an instance method because setDesktopProperty(..) is protected. */
1752 private void fireDesktopFontPropertyChanges() {
1753 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1754 SunToolkit.getDesktopFontHints());
1755 }
1756
1757 private static boolean checkedSystemAAFontSettings;
1758 private static boolean useSystemAAFontSettings;
1759 private static boolean lastExtraCondition = true;
1760 private static RenderingHints desktopFontHints;
1761
1762 /* Since Swing is the reason for this "extra condition" logic its
1763 * worth documenting it in some detail.
1764 * First, a goal is for Swing and applications to both retrieve and
1765 * use the same desktop property value so that there is complete
1766 * consistency between the settings used by JDK's Swing implementation
1767 * and 3rd party custom Swing components, custom L&Fs and any general
1768 * text rendering that wants to be consistent with these.
1769 * But by default on Solaris & Linux Swing will not use AA text over
1770 * remote X11 display (unless Xrender can be used which is TBD and may not
1771 * always be available anyway) as that is a noticeable performance hit.
1772 * So there needs to be a way to express that extra condition so that
1773 * it is seen by all clients of the desktop property API.
1774 * If this were the only condition it could be handled here as it would
1775 * be the same for any L&F and could reasonably be considered to be
1776 * a static behaviour of those systems.
1777 * But GTK currently has an additional test based on locale which is
1778 * not applied by Metal. So mixing GTK in a few locales with Metal
1779 * would mean the last one wins.
1780 * This could be stored per-app context which would work
1781 * for different applets, but wouldn't help for a single application
1782 * using GTK and some other L&F concurrently.
1783 * But it is expected this will be addressed within GTK and the font
1784 * system so is a temporary and somewhat unlikely harmless corner case.
1785 */
1786 public static void setAAFontSettingsCondition(boolean extraCondition) {
1787 if (extraCondition != lastExtraCondition) {
1788 lastExtraCondition = extraCondition;
1789 if (checkedSystemAAFontSettings) {
1790 /* Someone already asked for this info, under a different
1791 * condition.
1792 * We'll force re-evaluation instead of replicating the
1793 * logic, then notify any listeners of any change.
1794 */
1795 checkedSystemAAFontSettings = false;
1796 Toolkit tk = Toolkit.getDefaultToolkit();
1797 if (tk instanceof SunToolkit) {
1798 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1799 }
1800 }
1801 }
1802 }
1803
1804 /* "false", "off", ""default" aren't explicitly tested, they
1805 * just fall through to produce a null return which all are equated to
1806 * "false".
1807 */
1808 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1809 Object aaHint = null;
1810 hintname = hintname.toLowerCase(Locale.ENGLISH);
1811 if (hintname.equals("on")) {
1812 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1813 } else if (hintname.equals("gasp")) {
1814 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1815 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1816 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1817 } else if (hintname.equals("lcd_hbgr")) {
1818 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1819 } else if (hintname.equals("lcd_vrgb")) {
1820 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1821 } else if (hintname.equals("lcd_vbgr")) {
1822 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1823 }
1824 if (aaHint != null) {
1825 RenderingHints map = new RenderingHints(null);
1826 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1827 return map;
1828 } else {
1829 return null;
1830 }
1831 }
1832
1833 /* This method determines whether to use the system font settings,
1834 * or ignore them if a L&F has specified they should be ignored, or
1835 * to override both of these with a system property specified value.
1836 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1837 * system property isn't applied as desktop properties are considered
1838 * to be inapplicable in that case. In that headless case although
1839 * this method will return "true" the toolkit will return a null map.
1840 */
1841 private static boolean useSystemAAFontSettings() {
1842 if (!checkedSystemAAFontSettings) {
1843 useSystemAAFontSettings = true; /* initially set this true */
1844 String systemAAFonts = null;
1845 Toolkit tk = Toolkit.getDefaultToolkit();
1846 if (tk instanceof SunToolkit) {
1847 systemAAFonts =
1848 AccessController.doPrivileged(
1849 new GetPropertyAction("awt.useSystemAAFontSettings"));
1850 }
1851 if (systemAAFonts != null) {
1852 useSystemAAFontSettings =
1853 Boolean.valueOf(systemAAFonts).booleanValue();
1854 /* If it is anything other than "true", then it may be
1855 * a hint name , or it may be "off, "default", etc.
1856 */
1857 if (!useSystemAAFontSettings) {
1858 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1859 }
1860 }
1861 /* If its still true, apply the extra condition */
1862 if (useSystemAAFontSettings) {
1863 useSystemAAFontSettings = lastExtraCondition;
1864 }
1865 checkedSystemAAFontSettings = true;
1866 }
1867 return useSystemAAFontSettings;
1868 }
1869
1870 /* A variable defined for the convenience of JDK code */
1871 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1872
1873 /* Overridden by subclasses to return platform/desktop specific values */
1874 protected RenderingHints getDesktopAAHints() {
1875 return null;
1876 }
1877
1878 /* Subclass desktop property loading methods call this which
1879 * in turn calls the appropriate subclass implementation of
1880 * getDesktopAAHints() when system settings are being used.
1881 * Its public rather than protected because subclasses may delegate
1882 * to a helper class.
1883 */
1884 public static RenderingHints getDesktopFontHints() {
1885 if (useSystemAAFontSettings()) {
1886 Toolkit tk = Toolkit.getDefaultToolkit();
1887 if (tk instanceof SunToolkit) {
1888 Object map = ((SunToolkit)tk).getDesktopAAHints();
1889 return (RenderingHints)map;
1890 } else { /* Headless Toolkit */
1891 return null;
1892 }
1893 } else if (desktopFontHints != null) {
1894 /* cloning not necessary as the return value is cloned later, but
1895 * its harmless.
1896 */
1897 return (RenderingHints)(desktopFontHints.clone());
1898 } else {
1899 return null;
1900 }
1901 }
1902
1903
1904 public abstract boolean isDesktopSupported();
1905
1906 /*
1907 * consumeNextKeyTyped() method is not currently used,
1908 * however Swing could use it in the future.
1909 */
1910 private static Method consumeNextKeyTypedMethod = null;
1911 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1912 if (consumeNextKeyTypedMethod == null) {
1913 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1914 "consumeNextKeyTyped",
1915 new Class<?>[] {KeyEvent.class});
1916 }
1917 try {
1918 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1919 keyEvent);
1920 } catch (IllegalAccessException iae) {
1921 iae.printStackTrace();
1922 } catch (InvocationTargetException ite) {
1923 ite.printStackTrace();
1924 }
1925 }
1926
1927 protected static void dumpPeers(final PlatformLogger aLog) {
1928 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1929 }
1930
1931 /**
1932 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1933 * @return Window ancestor of the component or component by itself if it is Window;
1934 * null, if component is not a part of window hierarchy
1935 */
1936 public static Window getContainingWindow(Component comp) {
1937 while (comp != null && !(comp instanceof Window)) {
1938 comp = comp.getParent();
1939 }
1940 return (Window)comp;
1941 }
1942
1943 /**
1944 * Returns the value of the system property indicated by the specified key.
1945 */
1946 public static String getSystemProperty(final String key) {
1947 return AccessController.doPrivileged(new PrivilegedAction<String>() {
1948 public String run() {
1949 return System.getProperty(key);
1950 }
1951 });
1952 }
1953
1954 /**
1955 * Returns the boolean value of the system property indicated by the specified key.
1956 */
1957 protected static Boolean getBooleanSystemProperty(String key) {
1958 return AccessController.doPrivileged(new GetBooleanAction(key));
1959 }
1960
1961 private static Boolean sunAwtDisableMixing = null;
1962
1963 /**
1964 * Returns the value of "sun.awt.disableMixing" property. Default
1965 * value is {@code false}.
1966 */
1967 public synchronized static boolean getSunAwtDisableMixing() {
1968 if (sunAwtDisableMixing == null) {
1969 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1970 }
1971 return sunAwtDisableMixing.booleanValue();
1972 }
1973
1974 /**
1975 * Returns true if the native GTK libraries are available. The
1976 * default implementation returns false, but UNIXToolkit overrides this
1977 * method to provide a more specific answer.
1978 */
1979 public boolean isNativeGTKAvailable() {
1980 return false;
1981 }
1982
1983 // Cosntant alpha
1984 public boolean isWindowOpacitySupported() {
1985 return false;
1986 }
1987
1988 // Shaping
1989 public boolean isWindowShapingSupported() {
1990 return false;
1991 }
1992
1993 // Per-pixel alpha
1994 public boolean isWindowTranslucencySupported() {
1995 return false;
1996 }
1997
1998 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1999 return false;
2000 }
2001
2002 /**
2003 * Returns whether or not a containing top level window for the passed
2004 * component is
2005 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
2006 *
2007 * @param c a Component which toplevel's to check
2008 * @return {@code true} if the passed component is not null and has a
2009 * containing toplevel window which is opaque (so per-pixel translucency
2010 * is not enabled), {@code false} otherwise
2011 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
2012 */
2013 public static boolean isContainingTopLevelOpaque(Component c) {
2014 Window w = getContainingWindow(c);
2015 return w != null && w.isOpaque();
2016 }
2017
2018 /**
2019 * Returns whether or not a containing top level window for the passed
2020 * component is
2021 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2022 *
2023 * @param c a Component which toplevel's to check
2024 * @return {@code true} if the passed component is not null and has a
2025 * containing toplevel window which has opacity less than
2026 * 1.0f (which means that it is translucent), {@code false} otherwise
2027 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2028 */
2029 public static boolean isContainingTopLevelTranslucent(Component c) {
2030 Window w = getContainingWindow(c);
2031 return w != null && w.getOpacity() < 1.0f;
2032 }
2033
2034 /**
2035 * Returns whether the native system requires using the peer.updateWindow()
2036 * method to update the contents of a non-opaque window, or if usual
2037 * painting procedures are sufficient. The default return value covers
2038 * the X11 systems. On MS Windows this method is overriden in WToolkit
2039 * to return true.
2040 */
2041 public boolean needUpdateWindow() {
2042 return false;
2043 }
2044
2045 /**
2046 * Descendants of the SunToolkit should override and put their own logic here.
2047 */
2048 public int getNumberOfButtons(){
2049 return 3;
2050 }
2051
2052 /**
2053 * Checks that the given object implements/extends the given
2054 * interface/class.
2055 *
2056 * Note that using the instanceof operator causes a class to be loaded.
2057 * Using this method doesn't load a class and it can be used instead of
2058 * the instanceof operator for performance reasons.
2059 *
2060 * @param obj Object to be checked
2061 * @param type The name of the interface/class. Must be
2062 * fully-qualified interface/class name.
2063 * @return true, if this object implements/extends the given
2064 * interface/class, false, otherwise, or if obj or type is null
2065 */
2066 public static boolean isInstanceOf(Object obj, String type) {
2067 if (obj == null) return false;
2068 if (type == null) return false;
2069
2070 return isInstanceOf(obj.getClass(), type);
2071 }
2072
2073 private static boolean isInstanceOf(Class<?> cls, String type) {
2074 if (cls == null) return false;
2075
2076 if (cls.getName().equals(type)) {
2077 return true;
2078 }
2079
2080 for (Class<?> c : cls.getInterfaces()) {
2081 if (c.getName().equals(type)) {
2082 return true;
2083 }
2084 }
2085 return isInstanceOf(cls.getSuperclass(), type);
2086 }
2087
2088 ///////////////////////////////////////////////////////////////////////////
2089 //
2090 // The following methods help set and identify whether a particular
2091 // AWTEvent object was produced by the system or by user code. As of this
2092 // writing the only consumer is the Java Plug-In, although this information
2093 // could be useful to more clients and probably should be formalized in
2094 // the public API.
2095 //
2096 ///////////////////////////////////////////////////////////////////////////
2097
2098 public static void setSystemGenerated(AWTEvent e) {
2099 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2100 }
2101
2102 public static boolean isSystemGenerated(AWTEvent e) {
2103 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2104 }
2105
2106 } // class SunToolkit
2107
2108
2109 /*
2110 * PostEventQueue is a Thread that runs in the same AppContext as the
2111 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2112 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2113 * events to this queue, which then calls EventQueue.postEvent().
2114 *
2115 * We do this because EventQueue.postEvent() may be overridden by client
2116 * code, and we mustn't ever call client code from the toolkit thread.
2117 */
2118 class PostEventQueue {
2119 private EventQueueItem queueHead = null;
2120 private EventQueueItem queueTail = null;
2121 private final EventQueue eventQueue;
2122
2123 PostEventQueue(EventQueue eq) {
2124 eventQueue = eq;
2125 }
2126
2127 public synchronized boolean noEvents() {
2128 return queueHead == null;
2129 }
2130
2131 /*
2132 * Continually post pending AWTEvents to the Java EventQueue. The method
2133 * is synchronized to ensure the flush is completed before a new event
2134 * can be posted to this queue.
2135 */
2136 public synchronized void flush() {
2137 EventQueueItem tempQueue = queueHead;
2138 queueHead = queueTail = null;
2139 while (tempQueue != null) {
2140 eventQueue.postEvent(tempQueue.event);
2141 tempQueue = tempQueue.next;
2142 }
2143 }
2144
2145 /*
2146 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2147 */
2148 void postEvent(AWTEvent event) {
2149 EventQueueItem item = new EventQueueItem(event);
2150
2151 synchronized (this) {
2152 if (queueHead == null) {
2153 queueHead = queueTail = item;
2154 } else {
2155 queueTail.next = item;
2156 queueTail = item;
2157 }
2158 }
2159 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2160 }
2161 } // class PostEventQueue