1 /*
2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.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 @SuppressWarnings("deprecation")
201 public abstract FontPeer getFontPeer(String name, int style);
202
203 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
204 throws AWTException;
205
206 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
207 throws HeadlessException;
208
209 /**
210 * The AWT lock is typically only used on Unix platforms to synchronize
211 * access to Xlib, OpenGL, etc. However, these methods are implemented
212 * in SunToolkit so that they can be called from shared code (e.g.
213 * from the OGL pipeline) or from the X11 pipeline regardless of whether
214 * XToolkit or MToolkit is currently in use. There are native macros
215 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
216 * methods is changed, make sure it is compatible with the native macros.
217 *
218 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
219 * used in place of:
220 * synchronized (getAWTLock()) {
221 * ...
222 * }
223 *
224 * By factoring these methods out specially, we are able to change the
225 * implementation of these methods (e.g. use more advanced locking
226 * mechanisms) without impacting calling code.
227 *
228 * Sample usage:
229 * private void doStuffWithXlib() {
230 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
231 * SunToolkit.awtLock();
232 * try {
233 * ...
234 * XlibWrapper.XDoStuff();
235 * } finally {
236 * SunToolkit.awtUnlock();
237 * }
238 * }
239 */
240
241 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
242 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
243
244 public static final void awtLock() {
245 AWT_LOCK.lock();
246 }
247
248 public static final boolean awtTryLock() {
249 return AWT_LOCK.tryLock();
250 }
251
252 public static final void awtUnlock() {
253 AWT_LOCK.unlock();
254 }
255
256 public static final void awtLockWait()
257 throws InterruptedException
258 {
259 AWT_LOCK_COND.await();
260 }
261
262 public static final void awtLockWait(long timeout)
263 throws InterruptedException
264 {
265 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
266 }
267
268 public static final void awtLockNotify() {
269 AWT_LOCK_COND.signal();
270 }
271
272 public static final void awtLockNotifyAll() {
273 AWT_LOCK_COND.signalAll();
274 }
275
276 public static final boolean isAWTLockHeldByCurrentThread() {
277 return AWT_LOCK.isHeldByCurrentThread();
278 }
279
280 /*
281 * Create a new AppContext, along with its EventQueue, for a
282 * new ThreadGroup. Browser code, for example, would use this
283 * method to create an AppContext & EventQueue for an Applet.
284 */
285 public static AppContext createNewAppContext() {
286 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
287 // Create appContext before initialization of EventQueue, so all
288 // the calls to AppContext.getAppContext() from EventQueue ctor
289 // return correct values
290 AppContext appContext = new AppContext(threadGroup);
291
292 initEQ(appContext);
293
294 return appContext;
295 }
296
297 public static Field getField(final Class<?> klass, final String fieldName) {
298 return AccessController.doPrivileged(new PrivilegedAction<Field>() {
299 public Field run() {
300 try {
301 Field field = klass.getDeclaredField(fieldName);
302 assert (field != null);
303 field.setAccessible(true);
304 return field;
305 } catch (SecurityException e) {
306 assert false;
307 } catch (NoSuchFieldException e) {
308 assert false;
309 }
310 return null;
311 }//run
312 });
313 }
314
315 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
316 if (wakeupMethod == null){
317 wakeupMethod = AccessController.doPrivileged(new PrivilegedAction<Method>() {
318 public Method run() {
319 try {
320 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} );
321 if (method != null) {
322 method.setAccessible(true);
323 }
324 return method;
325 } catch (NoSuchMethodException e) {
326 assert false;
327 } catch (SecurityException e) {
328 assert false;
329 }
330 return null;
331 }//run
332 });
333 }
334 try{
335 if (wakeupMethod != null){
336 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)});
337 }
338 } catch (InvocationTargetException e){
339 assert false;
340 } catch (IllegalAccessException e) {
341 assert false;
342 }
343 }
344
345 /*
346 * Fetch the peer associated with the given target (as specified
347 * in the peer creation method). This can be used to determine
348 * things like what the parent peer is. If the target is null
349 * or the target can't be found (either because the a peer was
350 * never created for it or the peer was disposed), a null will
351 * be returned.
352 */
353 protected static Object targetToPeer(Object target) {
354 if (target != null && !GraphicsEnvironment.isHeadless()) {
355 return AWTAutoShutdown.getInstance().getPeer(target);
356 }
357 return null;
358 }
359
360 protected static void targetCreatedPeer(Object target, Object peer) {
361 if (target != null && peer != null &&
362 !GraphicsEnvironment.isHeadless())
363 {
364 AWTAutoShutdown.getInstance().registerPeer(target, peer);
365 }
366 }
367
368 protected static void targetDisposedPeer(Object target, Object peer) {
369 if (target != null && peer != null &&
370 !GraphicsEnvironment.isHeadless())
371 {
372 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
373 }
374 }
375
376 // Maps from non-Component/MenuComponent to AppContext.
377 // WeakHashMap<Component,AppContext>
378 private static final Map<Object, AppContext> appContextMap =
379 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
380
381 /**
382 * Sets the appContext field of target. If target is not a Component or
383 * MenuComponent, this returns false.
384 */
385 private static boolean setAppContext(Object target,
386 AppContext context) {
387 if (target instanceof Component) {
388 AWTAccessor.getComponentAccessor().
389 setAppContext((Component)target, context);
390 } else if (target instanceof MenuComponent) {
391 AWTAccessor.getMenuComponentAccessor().
392 setAppContext((MenuComponent)target, context);
393 } else {
394 return false;
395 }
396 return true;
397 }
398
399 /**
400 * Returns the appContext field for target. If target is not a
401 * Component or MenuComponent this returns null.
402 */
403 private static AppContext getAppContext(Object target) {
404 if (target instanceof Component) {
405 return AWTAccessor.getComponentAccessor().
406 getAppContext((Component)target);
407 } else if (target instanceof MenuComponent) {
408 return AWTAccessor.getMenuComponentAccessor().
409 getAppContext((MenuComponent)target);
410 } else {
411 return null;
412 }
413 }
414
415 /*
416 * Fetch the AppContext associated with the given target.
417 * This can be used to determine things like which EventQueue
418 * to use for posting events to a Component. If the target is
419 * null or the target can't be found, a null with be returned.
420 */
421 public static AppContext targetToAppContext(Object target) {
422 if (target == null || GraphicsEnvironment.isHeadless()) {
423 return null;
424 }
425 AppContext context = getAppContext(target);
426 if (context == null) {
427 // target is not a Component/MenuComponent, try the
428 // appContextMap.
429 context = appContextMap.get(target);
430 }
431 return context;
432 }
433
434 /**
435 * Sets the synchronous status of focus requests on lightweight
436 * components in the specified window to the specified value.
437 * If the boolean parameter is <code>true</code> then the focus
438 * requests on lightweight components will be performed
439 * synchronously, if it is <code>false</code>, then asynchronously.
440 * By default, all windows have their lightweight request status
441 * set to asynchronous.
442 * <p>
443 * The application can only set the status of lightweight focus
444 * requests to synchronous for any of its windows if it doesn't
445 * perform focus transfers between different heavyweight containers.
446 * In this case the observable focus behaviour is the same as with
447 * asynchronous status.
448 * <p>
449 * If the application performs focus transfer between different
450 * heavyweight containers and sets the lightweight focus request
451 * status to synchronous for any of its windows, then further focus
452 * behaviour is unspecified.
453 * <p>
454 * @param w window for which the lightweight focus request status
455 * should be set
456 * @param status the value of lightweight focus request status
457 */
458
459 public static void setLWRequestStatus(Window changed,boolean status){
460 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
461 };
462
463 public static void checkAndSetPolicy(Container cont) {
464 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
465 getCurrentKeyboardFocusManager().
466 getDefaultFocusTraversalPolicy();
467
468 cont.setFocusTraversalPolicy(defaultPolicy);
469 }
470
471 private static FocusTraversalPolicy createLayoutPolicy() {
472 FocusTraversalPolicy policy = null;
473 try {
474 Class<?> layoutPolicyClass =
475 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
476 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
477 }
478 catch (ClassNotFoundException e) {
479 assert false;
480 }
481 catch (InstantiationException e) {
482 assert false;
483 }
484 catch (IllegalAccessException e) {
485 assert false;
486 }
487
488 return policy;
489 }
490
491 /*
492 * Insert a mapping from target to AppContext, for later retrieval
493 * via targetToAppContext() above.
494 */
495 public static void insertTargetMapping(Object target, AppContext appContext) {
496 if (!GraphicsEnvironment.isHeadless()) {
497 if (!setAppContext(target, appContext)) {
498 // Target is not a Component/MenuComponent, use the private Map
499 // instead.
500 appContextMap.put(target, appContext);
501 }
502 }
503 }
504
505 /*
506 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
507 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
508 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
509 * not be called under another lock since it locks the EventQueue.
510 * See bugids 4632918, 4526597.
511 */
512 public static void postEvent(AppContext appContext, AWTEvent event) {
513 if (event == null) {
514 throw new NullPointerException();
515 }
516 // All events posted via this method are system-generated.
517 // Placing the following call here reduces considerably the
518 // number of places throughout the toolkit that would
519 // otherwise have to be modified to precisely identify
520 // system-generated events.
521 setSystemGenerated(event);
522 AppContext eventContext = targetToAppContext(event.getSource());
523 if (eventContext != null && !eventContext.equals(appContext)) {
524 log.fine("Event posted on wrong app context : " + event);
525 }
526 PostEventQueue postEventQueue =
527 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
528 if (postEventQueue != null) {
529 postEventQueue.postEvent(event);
530 }
531 }
532
533 /*
534 * Post AWTEvent of high priority.
535 */
536 public static void postPriorityEvent(final AWTEvent e) {
537 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
538 public void run() {
539 AWTAccessor.getAWTEventAccessor().setPosted(e);
540 ((Component)e.getSource()).dispatchEvent(e);
541 }
542 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
543 postEvent(targetToAppContext(e.getSource()), pe);
544 }
545
546 protected static final Lock flushLock = new ReentrantLock();
547 private static boolean isFlushingPendingEvents = false;
548
549 /*
550 * Flush any pending events which haven't been posted to the AWT
551 * EventQueue yet.
552 */
553 public static void flushPendingEvents() {
554 flushLock.lock();
555 try {
556 // Don't call flushPendingEvents() recursively
557 if (!isFlushingPendingEvents) {
558 isFlushingPendingEvents = true;
559 AppContext appContext = AppContext.getAppContext();
560 PostEventQueue postEventQueue =
561 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
562 if (postEventQueue != null) {
563 postEventQueue.flush();
564 }
565 }
566 } finally {
567 isFlushingPendingEvents = false;
568 flushLock.unlock();
569 }
570 }
571
572 public static boolean isPostEventQueueEmpty() {
573 AppContext appContext = AppContext.getAppContext();
574 PostEventQueue postEventQueue =
575 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
576 if (postEventQueue != null) {
577 return postEventQueue.noEvents();
578 } else {
579 return true;
580 }
581 }
582
583 /*
584 * Execute a chunk of code on the Java event handler thread for the
585 * given target. Does not wait for the execution to occur before
586 * returning to the caller.
587 */
588 public static void executeOnEventHandlerThread(Object target,
589 Runnable runnable) {
590 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
591 }
592
593 /*
594 * Fixed 5064013: the InvocationEvent time should be equals
595 * the time of the ActionEvent
596 */
597 @SuppressWarnings("serial")
598 public static void executeOnEventHandlerThread(Object target,
599 Runnable runnable,
600 final long when) {
601 executeOnEventHandlerThread(
602 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
603 public long getWhen() {
604 return when;
605 }
606 });
607 }
608
609 /*
610 * Execute a chunk of code on the Java event handler thread for the
611 * given target. Does not wait for the execution to occur before
612 * returning to the caller.
613 */
614 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
615 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
616 }
617
618 /*
619 * Execute a chunk of code on the Java event handler thread. The
620 * method takes into account provided AppContext and sets
621 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
622 * event. See 6451487 for detailes.
623 * Does not wait for the execution to occur before returning to
624 * the caller.
625 */
626 public static void invokeLaterOnAppContext(
627 AppContext appContext, Runnable dispatcher)
628 {
629 postEvent(appContext,
630 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
631 PeerEvent.PRIORITY_EVENT));
632 }
633
634 /*
635 * Execute a chunk of code on the Java event handler thread for the
636 * given target. Waits for the execution to occur before returning
637 * to the caller.
638 */
639 public static void executeOnEDTAndWait(Object target, Runnable runnable)
640 throws InterruptedException, InvocationTargetException
641 {
642 if (EventQueue.isDispatchThread()) {
643 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
644 }
645
646 class AWTInvocationLock {}
647 Object lock = new AWTInvocationLock();
648
649 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
650
651 synchronized (lock) {
652 executeOnEventHandlerThread(event);
653 while(!event.isDispatched()) {
654 lock.wait();
655 }
656 }
657
658 Throwable eventThrowable = event.getThrowable();
659 if (eventThrowable != null) {
660 throw new InvocationTargetException(eventThrowable);
661 }
662 }
663
664 /*
665 * Returns true if the calling thread is the event dispatch thread
666 * contained within AppContext which associated with the given target.
667 * Use this call to ensure that a given task is being executed
668 * (or not being) on the event dispatch thread for the given target.
669 */
670 public static boolean isDispatchThreadForAppContext(Object target) {
671 AppContext appContext = targetToAppContext(target);
672 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
673
674 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
675 return accessor.isDispatchThreadImpl(eq);
676 }
677
678 public Dimension getScreenSize() {
679 return new Dimension(getScreenWidth(), getScreenHeight());
680 }
681 protected abstract int getScreenWidth();
682 protected abstract int getScreenHeight();
683
684 @SuppressWarnings("deprecation")
685 public FontMetrics getFontMetrics(Font font) {
686 return FontDesignMetrics.getMetrics(font);
687 }
688
689 @SuppressWarnings("deprecation")
690 public String[] getFontList() {
691 String[] hardwiredFontList = {
692 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
693 Font.DIALOG_INPUT
694
695 // -- Obsolete font names from 1.0.2. It was decided that
696 // -- getFontList should not return these old names:
697 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
698 };
699 return hardwiredFontList;
700 }
701
702 public PanelPeer createPanel(Panel target) {
703 return (PanelPeer)createComponent(target);
704 }
705
706 public CanvasPeer createCanvas(Canvas target) {
707 return (CanvasPeer)createComponent(target);
708 }
709
710 /**
711 * Disables erasing of background on the canvas before painting if
712 * this is supported by the current toolkit. It is recommended to
713 * call this method early, before the Canvas becomes displayable,
714 * because some Toolkit implementations do not support changing
715 * this property once the Canvas becomes displayable.
716 */
717 public void disableBackgroundErase(Canvas canvas) {
718 disableBackgroundEraseImpl(canvas);
719 }
720
721 /**
722 * Disables the native erasing of the background on the given
723 * component before painting if this is supported by the current
724 * toolkit. This only has an effect for certain components such as
725 * Canvas, Panel and Window. It is recommended to call this method
726 * early, before the Component becomes displayable, because some
727 * Toolkit implementations do not support changing this property
728 * once the Component becomes displayable.
729 */
730 public void disableBackgroundErase(Component component) {
731 disableBackgroundEraseImpl(component);
732 }
733
734 private void disableBackgroundEraseImpl(Component component) {
735 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
736 }
737
738 /**
739 * Returns the value of "sun.awt.noerasebackground" property. Default
740 * value is {@code false}.
741 */
742 public static boolean getSunAwtNoerasebackground() {
743 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
744 }
745
746 /**
747 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
748 * value is {@code false}.
749 */
750 public static boolean getSunAwtErasebackgroundonresize() {
751 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
752 }
753
754
755 static final SoftCache imgCache = new SoftCache();
756
757 static Image getImageFromHash(Toolkit tk, URL url) {
758 SecurityManager sm = System.getSecurityManager();
759 if (sm != null) {
760 try {
761 java.security.Permission perm =
762 url.openConnection().getPermission();
763 if (perm != null) {
764 try {
765 sm.checkPermission(perm);
766 } catch (SecurityException se) {
767 // fallback to checkRead/checkConnect for pre 1.2
768 // security managers
769 if ((perm instanceof java.io.FilePermission) &&
770 perm.getActions().indexOf("read") != -1) {
771 sm.checkRead(perm.getName());
772 } else if ((perm instanceof
773 java.net.SocketPermission) &&
774 perm.getActions().indexOf("connect") != -1) {
775 sm.checkConnect(url.getHost(), url.getPort());
776 } else {
777 throw se;
778 }
779 }
780 }
781 } catch (java.io.IOException ioe) {
782 sm.checkConnect(url.getHost(), url.getPort());
783 }
784 }
785 synchronized (imgCache) {
786 Image img = (Image)imgCache.get(url);
787 if (img == null) {
788 try {
789 img = tk.createImage(new URLImageSource(url));
790 imgCache.put(url, img);
791 } catch (Exception e) {
792 }
793 }
794 return img;
795 }
796 }
797
798 static Image getImageFromHash(Toolkit tk,
799 String filename) {
800 SecurityManager security = System.getSecurityManager();
801 if (security != null) {
802 security.checkRead(filename);
803 }
804 synchronized (imgCache) {
805 Image img = (Image)imgCache.get(filename);
806 if (img == null) {
807 try {
808 img = tk.createImage(new FileImageSource(filename));
809 imgCache.put(filename, img);
810 } catch (Exception e) {
811 }
812 }
813 return img;
814 }
815 }
816
817 public Image getImage(String filename) {
818 return getImageFromHash(this, filename);
819 }
820
821 public Image getImage(URL url) {
822 return getImageFromHash(this, url);
823 }
824
825 public Image createImage(String filename) {
826 SecurityManager security = System.getSecurityManager();
827 if (security != null) {
828 security.checkRead(filename);
829 }
830 return createImage(new FileImageSource(filename));
831 }
832
833 public Image createImage(URL url) {
834 SecurityManager sm = System.getSecurityManager();
835 if (sm != null) {
836 try {
837 java.security.Permission perm =
838 url.openConnection().getPermission();
839 if (perm != null) {
840 try {
841 sm.checkPermission(perm);
842 } catch (SecurityException se) {
843 // fallback to checkRead/checkConnect for pre 1.2
844 // security managers
845 if ((perm instanceof java.io.FilePermission) &&
846 perm.getActions().indexOf("read") != -1) {
847 sm.checkRead(perm.getName());
848 } else if ((perm instanceof
849 java.net.SocketPermission) &&
850 perm.getActions().indexOf("connect") != -1) {
851 sm.checkConnect(url.getHost(), url.getPort());
852 } else {
853 throw se;
854 }
855 }
856 }
857 } catch (java.io.IOException ioe) {
858 sm.checkConnect(url.getHost(), url.getPort());
859 }
860 }
861 return createImage(new URLImageSource(url));
862 }
863
864 public Image createImage(byte[] data, int offset, int length) {
865 return createImage(new ByteArrayImageSource(data, offset, length));
866 }
867
868 public Image createImage(ImageProducer producer) {
869 return new ToolkitImage(producer);
870 }
871
872 public int checkImage(Image img, int w, int h, ImageObserver o) {
873 if (!(img instanceof ToolkitImage)) {
874 return ImageObserver.ALLBITS;
875 }
876
877 ToolkitImage tkimg = (ToolkitImage)img;
878 int repbits;
879 if (w == 0 || h == 0) {
880 repbits = ImageObserver.ALLBITS;
881 } else {
882 repbits = tkimg.getImageRep().check(o);
883 }
884 return tkimg.check(o) | repbits;
885 }
886
887 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
888 if (w == 0 || h == 0) {
889 return true;
890 }
891
892 // Must be a ToolkitImage
893 if (!(img instanceof ToolkitImage)) {
894 return true;
895 }
896
897 ToolkitImage tkimg = (ToolkitImage)img;
898 if (tkimg.hasError()) {
899 if (o != null) {
900 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
901 -1, -1, -1, -1);
902 }
903 return false;
904 }
905 ImageRepresentation ir = tkimg.getImageRep();
906 return ir.prepare(o);
907 }
908
909 /**
910 * Scans {@code imageList} for best-looking image of specified dimensions.
911 * Image can be scaled and/or padded with transparency.
912 */
913 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
914 if (width == 0 || height == 0) {
915 return null;
916 }
917 Image bestImage = null;
918 int bestWidth = 0;
919 int bestHeight = 0;
920 double bestSimilarity = 3; //Impossibly high value
921 double bestScaleFactor = 0;
922 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
923 //Iterate imageList looking for best matching image.
924 //'Similarity' measure is defined as good scale factor and small insets.
925 //best possible similarity is 0 (no scale, no insets).
926 //It's found while the experiments that good-looking result is achieved
927 //with scale factors x1, x3/4, x2/3, xN, x1/N.
928 Image im = i.next();
929 if (im == null) {
930 if (log.isLoggable(PlatformLogger.FINER)) {
931 log.finer("SunToolkit.getScaledIconImage: " +
932 "Skipping the image passed into Java because it's null.");
933 }
934 continue;
935 }
936 if (im instanceof ToolkitImage) {
937 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
938 ir.reconstruct(ImageObserver.ALLBITS);
939 }
940 int iw;
941 int ih;
942 try {
943 iw = im.getWidth(null);
944 ih = im.getHeight(null);
945 } catch (Exception e){
946 if (log.isLoggable(PlatformLogger.FINER)) {
947 log.finer("SunToolkit.getScaledIconImage: " +
948 "Perhaps the image passed into Java is broken. Skipping this icon.");
949 }
950 continue;
951 }
952 if (iw > 0 && ih > 0) {
953 //Calc scale factor
954 double scaleFactor = Math.min((double)width / (double)iw,
955 (double)height / (double)ih);
956 //Calculate scaled image dimensions
957 //adjusting scale factor to nearest "good" value
958 int adjw = 0;
959 int adjh = 0;
960 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
961 if (scaleFactor >= 2) {
962 //Need to enlarge image more than twice
963 //Round down scale factor to multiply by integer value
964 scaleFactor = Math.floor(scaleFactor);
965 adjw = iw * (int)scaleFactor;
966 adjh = ih * (int)scaleFactor;
967 scaleMeasure = 1.0 - 0.5 / scaleFactor;
968 } else if (scaleFactor >= 1) {
969 //Don't scale
970 scaleFactor = 1.0;
971 adjw = iw;
972 adjh = ih;
973 scaleMeasure = 0;
974 } else if (scaleFactor >= 0.75) {
975 //Multiply by 3/4
976 scaleFactor = 0.75;
977 adjw = iw * 3 / 4;
978 adjh = ih * 3 / 4;
979 scaleMeasure = 0.3;
980 } else if (scaleFactor >= 0.6666) {
981 //Multiply by 2/3
982 scaleFactor = 0.6666;
983 adjw = iw * 2 / 3;
984 adjh = ih * 2 / 3;
985 scaleMeasure = 0.33;
986 } else {
987 //Multiply size by 1/scaleDivider
988 //where scaleDivider is minimum possible integer
989 //larger than 1/scaleFactor
990 double scaleDivider = Math.ceil(1.0 / scaleFactor);
991 scaleFactor = 1.0 / scaleDivider;
992 adjw = (int)Math.round((double)iw / scaleDivider);
993 adjh = (int)Math.round((double)ih / scaleDivider);
994 scaleMeasure = 1.0 - 1.0 / scaleDivider;
995 }
996 double similarity = ((double)width - (double)adjw) / (double)width +
997 ((double)height - (double)adjh) / (double)height + //Large padding is bad
998 scaleMeasure; //Large rescale is bad
999 if (similarity < bestSimilarity) {
1000 bestSimilarity = similarity;
1001 bestScaleFactor = scaleFactor;
1002 bestImage = im;
1003 bestWidth = adjw;
1004 bestHeight = adjh;
1005 }
1006 if (similarity == 0) break;
1007 }
1008 }
1009 if (bestImage == null) {
1010 //No images were found, possibly all are broken
1011 return null;
1012 }
1013 BufferedImage bimage =
1014 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1015 Graphics2D g = bimage.createGraphics();
1016 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1017 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1018 try {
1019 int x = (width - bestWidth) / 2;
1020 int y = (height - bestHeight) / 2;
1021 if (log.isLoggable(PlatformLogger.FINER)) {
1022 log.finer("WWindowPeer.getScaledIconData() result : " +
1023 "w : " + width + " h : " + height +
1024 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1025 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1026 " adjW : " + bestWidth + " adjH : " + bestHeight +
1027 " x : " + x + " y : " + y);
1028 }
1029 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1030 } finally {
1031 g.dispose();
1032 }
1033 return bimage;
1034 }
1035
1036 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1037 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1038 if (bimage == null) {
1039 if (log.isLoggable(PlatformLogger.FINER)) {
1040 log.finer("SunToolkit.getScaledIconData: " +
1041 "Perhaps the image passed into Java is broken. Skipping this icon.");
1042 }
1043 return null;
1044 }
1045 Raster raster = bimage.getRaster();
1046 DataBuffer buffer = raster.getDataBuffer();
1047 return (DataBufferInt)buffer;
1048 }
1049
1050 protected EventQueue getSystemEventQueueImpl() {
1051 return getSystemEventQueueImplPP();
1052 }
1053
1054 // Package private implementation
1055 static EventQueue getSystemEventQueueImplPP() {
1056 return getSystemEventQueueImplPP(AppContext.getAppContext());
1057 }
1058
1059 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1060 EventQueue theEventQueue =
1061 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1062 return theEventQueue;
1063 }
1064
1065 /**
1066 * Give native peers the ability to query the native container
1067 * given a native component (eg the direct parent may be lightweight).
1068 */
1069 public static Container getNativeContainer(Component c) {
1070 return Toolkit.getNativeContainer(c);
1071 }
1072
1073 /**
1074 * Gives native peers the ability to query the closest HW component.
1075 * If the given component is heavyweight, then it returns this. Otherwise,
1076 * it goes one level up in the hierarchy and tests next component.
1077 */
1078 public static Component getHeavyweightComponent(Component c) {
1079 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1080 c = AWTAccessor.getComponentAccessor().getParent(c);
1081 }
1082 return c;
1083 }
1084
1085 /**
1086 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1087 */
1088 public int getFocusAcceleratorKeyMask() {
1089 return InputEvent.ALT_MASK;
1090 }
1091
1092 /**
1093 * Tests whether specified key modifiers mask can be used to enter a printable
1094 * character. This is a default implementation of this method, which reflects
1095 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1096 * characters from the extended character set (like euro sign or math symbols)
1097 */
1098 public boolean isPrintableCharacterModifiersMask(int mods) {
1099 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1100 }
1101
1102 /**
1103 * Returns whether popup is allowed to be shown above the task bar.
1104 * This is a default implementation of this method, which checks
1105 * corresponding security permission.
1106 */
1107 public boolean canPopupOverlapTaskBar() {
1108 boolean result = true;
1109 try {
1110 SecurityManager sm = System.getSecurityManager();
1111 if (sm != null) {
1112 sm.checkPermission(
1113 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1114 }
1115 } catch (SecurityException se) {
1116 // There is no permission to show popups over the task bar
1117 result = false;
1118 }
1119 return result;
1120 }
1121
1122 /**
1123 * Returns a new input method window, with behavior as specified in
1124 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1125 * If the inputContext is not null, the window should return it from its
1126 * getInputContext() method. The window needs to implement
1127 * sun.awt.im.InputMethodWindow.
1128 * <p>
1129 * SunToolkit subclasses can override this method to return better input
1130 * method windows.
1131 */
1132 public Window createInputMethodWindow(String title, InputContext context) {
1133 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1134 }
1135
1136 /**
1137 * Returns whether enableInputMethods should be set to true for peered
1138 * TextComponent instances on this platform. False by default.
1139 */
1140 public boolean enableInputMethodsForTextComponent() {
1141 return false;
1142 }
1143
1144 private static Locale startupLocale = null;
1145
1146 /**
1147 * Returns the locale in which the runtime was started.
1148 */
1149 public static Locale getStartupLocale() {
1150 if (startupLocale == null) {
1151 String language, region, country, variant;
1152 language = AccessController.doPrivileged(
1153 new GetPropertyAction("user.language", "en"));
1154 // for compatibility, check for old user.region property
1155 region = AccessController.doPrivileged(
1156 new GetPropertyAction("user.region"));
1157 if (region != null) {
1158 // region can be of form country, country_variant, or _variant
1159 int i = region.indexOf('_');
1160 if (i >= 0) {
1161 country = region.substring(0, i);
1162 variant = region.substring(i + 1);
1163 } else {
1164 country = region;
1165 variant = "";
1166 }
1167 } else {
1168 country = AccessController.doPrivileged(
1169 new GetPropertyAction("user.country", ""));
1170 variant = AccessController.doPrivileged(
1171 new GetPropertyAction("user.variant", ""));
1172 }
1173 startupLocale = new Locale(language, country, variant);
1174 }
1175 return startupLocale;
1176 }
1177
1178 /**
1179 * Returns the default keyboard locale of the underlying operating system
1180 */
1181 public Locale getDefaultKeyboardLocale() {
1182 return getStartupLocale();
1183 }
1184
1185 private static String dataTransfererClassName = null;
1186
1187 protected static void setDataTransfererClassName(String className) {
1188 dataTransfererClassName = className;
1189 }
1190
1191 public static String getDataTransfererClassName() {
1192 if (dataTransfererClassName == null) {
1193 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1194 }
1195 return dataTransfererClassName;
1196 }
1197
1198 // Support for window closing event notifications
1199 private transient WindowClosingListener windowClosingListener = null;
1200 /**
1201 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1202 */
1203 public WindowClosingListener getWindowClosingListener() {
1204 return windowClosingListener;
1205 }
1206 /**
1207 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1208 */
1209 public void setWindowClosingListener(WindowClosingListener wcl) {
1210 windowClosingListener = wcl;
1211 }
1212
1213 /**
1214 * @see sun.awt.WindowClosingListener#windowClosingNotify
1215 */
1216 public RuntimeException windowClosingNotify(WindowEvent event) {
1217 if (windowClosingListener != null) {
1218 return windowClosingListener.windowClosingNotify(event);
1219 } else {
1220 return null;
1221 }
1222 }
1223 /**
1224 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1225 */
1226 public RuntimeException windowClosingDelivered(WindowEvent event) {
1227 if (windowClosingListener != null) {
1228 return windowClosingListener.windowClosingDelivered(event);
1229 } else {
1230 return null;
1231 }
1232 }
1233
1234 private static DefaultMouseInfoPeer mPeer = null;
1235
1236 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1237 if (mPeer == null) {
1238 mPeer = new DefaultMouseInfoPeer();
1239 }
1240 return mPeer;
1241 }
1242
1243
1244 /**
1245 * Returns whether default toolkit needs the support of the xembed
1246 * from embedding host(if any).
1247 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1248 */
1249 public static boolean needsXEmbed() {
1250 String noxembed = AccessController.
1251 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1252 if ("true".equals(noxembed)) {
1253 return false;
1254 }
1255
1256 Toolkit tk = Toolkit.getDefaultToolkit();
1257 if (tk instanceof SunToolkit) {
1258 // SunToolkit descendants should override this method to specify
1259 // concrete behavior
1260 return ((SunToolkit)tk).needsXEmbedImpl();
1261 } else {
1262 // Non-SunToolkit doubtly might support XEmbed
1263 return false;
1264 }
1265 }
1266
1267 /**
1268 * Returns whether this toolkit needs the support of the xembed
1269 * from embedding host(if any).
1270 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1271 */
1272 protected boolean needsXEmbedImpl() {
1273 return false;
1274 }
1275
1276 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1277
1278 /**
1279 * Returns whether the XEmbed server feature is requested by
1280 * developer. If true, Toolkit should return an
1281 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1282 */
1283 protected final boolean isXEmbedServerRequested() {
1284 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1285 }
1286
1287 /**
1288 * Returns whether the modal exclusion API is supported by the current toolkit.
1289 * When it isn't supported, calling <code>setModalExcluded</code> has no
1290 * effect, and <code>isModalExcluded</code> returns false for all windows.
1291 *
1292 * @return true if modal exclusion is supported by the toolkit, false otherwise
1293 *
1294 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1295 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1296 *
1297 * @since 1.5
1298 */
1299 public static boolean isModalExcludedSupported()
1300 {
1301 Toolkit tk = Toolkit.getDefaultToolkit();
1302 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1303 }
1304 /*
1305 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1306 *
1307 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1308 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1309 *
1310 * @since 1.5
1311 */
1312 protected boolean isModalExcludedSupportedImpl()
1313 {
1314 return false;
1315 }
1316
1317 /*
1318 * Sets this window to be excluded from being modally blocked. When the
1319 * toolkit supports modal exclusion and this method is called, input
1320 * events, focus transfer and z-order will continue to work for the
1321 * window, it's owned windows and child components, even in the
1322 * presence of a modal dialog.
1323 * For details on which <code>Window</code>s are normally blocked
1324 * by modal dialog, see {@link java.awt.Dialog}.
1325 * Invoking this method when the modal exclusion API is not supported by
1326 * the current toolkit has no effect.
1327 * @param window Window to be marked as not modally blocked
1328 * @see java.awt.Dialog
1329 * @see java.awt.Dialog#setModal(boolean)
1330 * @see sun.awt.SunToolkit#isModalExcludedSupported
1331 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1332 */
1333 public static void setModalExcluded(Window window)
1334 {
1335 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1336 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1337 }
1338 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1339 }
1340
1341 /*
1342 * Returns whether the specified window is blocked by modal dialogs.
1343 * If the modal exclusion API isn't supported by the current toolkit,
1344 * it returns false for all windows.
1345 *
1346 * @param window Window to test for modal exclusion
1347 *
1348 * @return true if the window is modal excluded, false otherwise. If
1349 * the modal exclusion isn't supported by the current Toolkit, false
1350 * is returned
1351 *
1352 * @see sun.awt.SunToolkit#isModalExcludedSupported
1353 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1354 *
1355 * @since 1.5
1356 */
1357 public static boolean isModalExcluded(Window window)
1358 {
1359 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1360 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1361 }
1362 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1363 }
1364
1365 /**
1366 * Overridden in XToolkit and WToolkit
1367 */
1368 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1369 return (modalityType == Dialog.ModalityType.MODELESS) ||
1370 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1371 }
1372
1373 /**
1374 * Overridden in XToolkit and WToolkit
1375 */
1376 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1377 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1378 }
1379
1380 ///////////////////////////////////////////////////////////////////////////
1381 //
1382 // The following is used by the Java Plug-in to coordinate dialog modality
1383 // between containing applications (browsers, ActiveX containers etc) and
1384 // the AWT.
1385 //
1386 ///////////////////////////////////////////////////////////////////////////
1387
1388 private ModalityListenerList modalityListeners = new ModalityListenerList();
1389
1390 public void addModalityListener(ModalityListener listener) {
1391 modalityListeners.add(listener);
1392 }
1393
1394 public void removeModalityListener(ModalityListener listener) {
1395 modalityListeners.remove(listener);
1396 }
1397
1398 public void notifyModalityPushed(Dialog dialog) {
1399 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1400 }
1401
1402 public void notifyModalityPopped(Dialog dialog) {
1403 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1404 }
1405
1406 final void notifyModalityChange(int id, Dialog source) {
1407 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1408 ev.dispatch();
1409 }
1410
1411 static class ModalityListenerList implements ModalityListener {
1412
1413 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1414
1415 void add(ModalityListener listener) {
1416 listeners.addElement(listener);
1417 }
1418
1419 void remove(ModalityListener listener) {
1420 listeners.removeElement(listener);
1421 }
1422
1423 public void modalityPushed(ModalityEvent ev) {
1424 Iterator<ModalityListener> it = listeners.iterator();
1425 while (it.hasNext()) {
1426 it.next().modalityPushed(ev);
1427 }
1428 }
1429
1430 public void modalityPopped(ModalityEvent ev) {
1431 Iterator<ModalityListener> it = listeners.iterator();
1432 while (it.hasNext()) {
1433 it.next().modalityPopped(ev);
1434 }
1435 }
1436 } // end of class ModalityListenerList
1437
1438 ///////////////////////////////////////////////////////////////////////////
1439 // End Plug-in code
1440 ///////////////////////////////////////////////////////////////////////////
1441
1442 public static boolean isLightweightOrUnknown(Component comp) {
1443 if (comp.isLightweight()
1444 || !(getDefaultToolkit() instanceof SunToolkit))
1445 {
1446 return true;
1447 }
1448 return !(comp instanceof Button
1449 || comp instanceof Canvas
1450 || comp instanceof Checkbox
1451 || comp instanceof Choice
1452 || comp instanceof Label
1453 || comp instanceof java.awt.List
1454 || comp instanceof Panel
1455 || comp instanceof Scrollbar
1456 || comp instanceof ScrollPane
1457 || comp instanceof TextArea
1458 || comp instanceof TextField
1459 || comp instanceof Window);
1460 }
1461
1462 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) {
1463 Method res = null;
1464 try {
1465 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1466 public Method run() throws Exception {
1467 Method m = clz.getDeclaredMethod(methodName, params);
1468 m.setAccessible(true);
1469 return m;
1470 }
1471 });
1472 } catch (PrivilegedActionException ex) {
1473 ex.printStackTrace();
1474 }
1475 return res;
1476 }
1477
1478 @SuppressWarnings("serial")
1479 public static class OperationTimedOut extends RuntimeException {
1480 public OperationTimedOut(String msg) {
1481 super(msg);
1482 }
1483 public OperationTimedOut() {
1484 }
1485 }
1486
1487 @SuppressWarnings("serial")
1488 public static class InfiniteLoop extends RuntimeException {
1489 }
1490
1491 @SuppressWarnings("serial")
1492 public static class IllegalThreadException extends RuntimeException {
1493 public IllegalThreadException(String msg) {
1494 super(msg);
1495 }
1496 public IllegalThreadException() {
1497 }
1498 }
1499
1500 public static final int DEFAULT_WAIT_TIME = 10000;
1501 private static final int MAX_ITERS = 20;
1502 private static final int MIN_ITERS = 0;
1503 private static final int MINIMAL_EDELAY = 0;
1504
1505 /**
1506 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1507 */
1508 public void realSync() throws OperationTimedOut, InfiniteLoop {
1509 realSync(DEFAULT_WAIT_TIME);
1510 }
1511
1512 /**
1513 * Forces toolkit to synchronize with the native windowing
1514 * sub-system, flushing all pending work and waiting for all the
1515 * events to be processed. This method guarantees that after
1516 * return no additional Java events will be generated, unless
1517 * cause by user. Obviously, the method cannot be used on the
1518 * event dispatch thread (EDT). In case it nevertheless gets
1519 * invoked on this thread, the method throws the
1520 * IllegalThreadException runtime exception.
1521 *
1522 * <p> This method allows to write tests without explicit timeouts
1523 * or wait for some event. Example:
1524 * <code>
1525 * Frame f = ...;
1526 * f.setVisible(true);
1527 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1528 * </code>
1529 *
1530 * <p> After realSync, <code>f</code> will be completely visible
1531 * on the screen, its getLocationOnScreen will be returning the
1532 * right result and it will be the focus owner.
1533 *
1534 * <p> Another example:
1535 * <code>
1536 * b.requestFocus();
1537 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1538 * </code>
1539 *
1540 * <p> After realSync, <code>b</code> will be focus owner.
1541 *
1542 * <p> Notice that realSync isn't guaranteed to work if recurring
1543 * actions occur, such as if during processing of some event
1544 * another request which may generate some events occurs. By
1545 * default, sync tries to perform as much as {@value MAX_ITERS}
1546 * cycles of event processing, allowing for roughly {@value
1547 * MAX_ITERS} additional requests.
1548 *
1549 * <p> For example, requestFocus() generates native request, which
1550 * generates one or two Java focus events, which then generate a
1551 * serie of paint events, a serie of Java focus events, which then
1552 * generate a serie of paint events which then are processed -
1553 * three cycles, minimum.
1554 *
1555 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1556 */
1557 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1558 {
1559 if (EventQueue.isDispatchThread()) {
1560 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1561 }
1562 int bigLoop = 0;
1563 do {
1564 // Let's do sync first
1565 sync();
1566
1567 // During the wait process, when we were processing incoming
1568 // events, we could have made some new request, which can
1569 // generate new events. Example: MapNotify/XSetInputFocus.
1570 // Therefore, we dispatch them as long as there is something
1571 // to dispatch.
1572 int iters = 0;
1573 while (iters < MIN_ITERS) {
1574 syncNativeQueue(timeout);
1575 iters++;
1576 }
1577 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1578 iters++;
1579 }
1580 if (iters >= MAX_ITERS) {
1581 throw new InfiniteLoop();
1582 }
1583
1584 // native requests were dispatched by X/Window Manager or Windows
1585 // Moreover, we processed them all on Toolkit thread
1586 // Now wait while EDT processes them.
1587 //
1588 // During processing of some events (focus, for example),
1589 // some other events could have been generated. So, after
1590 // waitForIdle, we may end up with full EventQueue
1591 iters = 0;
1592 while (iters < MIN_ITERS) {
1593 waitForIdle(timeout);
1594 iters++;
1595 }
1596 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1597 iters++;
1598 }
1599 if (iters >= MAX_ITERS) {
1600 throw new InfiniteLoop();
1601 }
1602
1603 bigLoop++;
1604 // Again, for Java events, it was simple to check for new Java
1605 // events by checking event queue, but what if Java events
1606 // resulted in native requests? Therefor, check native events again.
1607 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1608 }
1609
1610 /**
1611 * Platform toolkits need to implement this method to perform the
1612 * sync of the native queue. The method should wait until native
1613 * requests are processed, all native events are processed and
1614 * corresponding Java events are generated. Should return
1615 * <code>true</code> if some events were processed,
1616 * <code>false</code> otherwise.
1617 */
1618 protected abstract boolean syncNativeQueue(final long timeout);
1619
1620 private boolean eventDispatched = false;
1621 private boolean queueEmpty = false;
1622 private final Object waitLock = "Wait Lock";
1623
1624 static Method eqNoEvents;
1625
1626 private boolean isEQEmpty() {
1627 EventQueue queue = getSystemEventQueueImpl();
1628 synchronized(SunToolkit.class) {
1629 if (eqNoEvents == null) {
1630 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1631 }
1632 }
1633 try {
1634 return (Boolean)eqNoEvents.invoke(queue);
1635 } catch (Exception e) {
1636 e.printStackTrace();
1637 return false;
1638 }
1639 }
1640
1641 /**
1642 * Waits for the Java event queue to empty. Ensures that all
1643 * events are processed (including paint events), and that if
1644 * recursive events were generated, they are also processed.
1645 * Should return <code>true</code> if more processing is
1646 * necessary, <code>false</code> otherwise.
1647 */
1648 @SuppressWarnings("serial")
1649 protected final boolean waitForIdle(final long timeout) {
1650 flushPendingEvents();
1651 boolean queueWasEmpty = isEQEmpty();
1652 queueEmpty = false;
1653 eventDispatched = false;
1654 synchronized(waitLock) {
1655 postEvent(AppContext.getAppContext(),
1656 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1657 public void dispatch() {
1658 // Here we block EDT. It could have some
1659 // events, it should have dispatched them by
1660 // now. So native requests could have been
1661 // generated. First, dispatch them. Then,
1662 // flush Java events again.
1663 int iters = 0;
1664 while (iters < MIN_ITERS) {
1665 syncNativeQueue(timeout);
1666 iters++;
1667 }
1668 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1669 iters++;
1670 }
1671 flushPendingEvents();
1672
1673 synchronized(waitLock) {
1674 queueEmpty = isEQEmpty();
1675 eventDispatched = true;
1676 waitLock.notifyAll();
1677 }
1678 }
1679 });
1680 try {
1681 while (!eventDispatched) {
1682 waitLock.wait();
1683 }
1684 } catch (InterruptedException ie) {
1685 return false;
1686 }
1687 }
1688
1689 try {
1690 Thread.sleep(MINIMAL_EDELAY);
1691 } catch (InterruptedException ie) {
1692 throw new RuntimeException("Interrupted");
1693 }
1694
1695 flushPendingEvents();
1696
1697 // Lock to force write-cache flush for queueEmpty.
1698 synchronized (waitLock) {
1699 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1700 }
1701 }
1702
1703 /**
1704 * Grabs the mouse input for the given window. The window must be
1705 * visible. The window or its children do not receive any
1706 * additional mouse events besides those targeted to them. All
1707 * other events will be dispatched as before - to the respective
1708 * targets. This Window will receive UngrabEvent when automatic
1709 * ungrab is about to happen. The event can be listened to by
1710 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1711 * UngrabEvent class for the list of conditions when ungrab is
1712 * about to happen.
1713 * @see UngrabEvent
1714 */
1715 public abstract void grab(Window w);
1716
1717 /**
1718 * Forces ungrab. No event will be sent.
1719 */
1720 public abstract void ungrab(Window w);
1721
1722
1723 /**
1724 * Locates the splash screen library in a platform dependent way and closes
1725 * the splash screen. Should be invoked on first top-level frame display.
1726 * @see java.awt.SplashScreen
1727 * @since 1.6
1728 */
1729 public static native void closeSplashScreen();
1730
1731 /* The following methods and variables are to support retrieving
1732 * desktop text anti-aliasing settings
1733 */
1734
1735 /* Need an instance method because setDesktopProperty(..) is protected. */
1736 private void fireDesktopFontPropertyChanges() {
1737 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1738 SunToolkit.getDesktopFontHints());
1739 }
1740
1741 private static boolean checkedSystemAAFontSettings;
1742 private static boolean useSystemAAFontSettings;
1743 private static boolean lastExtraCondition = true;
1744 private static RenderingHints desktopFontHints;
1745
1746 /* Since Swing is the reason for this "extra condition" logic its
1747 * worth documenting it in some detail.
1748 * First, a goal is for Swing and applications to both retrieve and
1749 * use the same desktop property value so that there is complete
1750 * consistency between the settings used by JDK's Swing implementation
1751 * and 3rd party custom Swing components, custom L&Fs and any general
1752 * text rendering that wants to be consistent with these.
1753 * But by default on Solaris & Linux Swing will not use AA text over
1754 * remote X11 display (unless Xrender can be used which is TBD and may not
1755 * always be available anyway) as that is a noticeable performance hit.
1756 * So there needs to be a way to express that extra condition so that
1757 * it is seen by all clients of the desktop property API.
1758 * If this were the only condition it could be handled here as it would
1759 * be the same for any L&F and could reasonably be considered to be
1760 * a static behaviour of those systems.
1761 * But GTK currently has an additional test based on locale which is
1762 * not applied by Metal. So mixing GTK in a few locales with Metal
1763 * would mean the last one wins.
1764 * This could be stored per-app context which would work
1765 * for different applets, but wouldn't help for a single application
1766 * using GTK and some other L&F concurrently.
1767 * But it is expected this will be addressed within GTK and the font
1768 * system so is a temporary and somewhat unlikely harmless corner case.
1769 */
1770 public static void setAAFontSettingsCondition(boolean extraCondition) {
1771 if (extraCondition != lastExtraCondition) {
1772 lastExtraCondition = extraCondition;
1773 if (checkedSystemAAFontSettings) {
1774 /* Someone already asked for this info, under a different
1775 * condition.
1776 * We'll force re-evaluation instead of replicating the
1777 * logic, then notify any listeners of any change.
1778 */
1779 checkedSystemAAFontSettings = false;
1780 Toolkit tk = Toolkit.getDefaultToolkit();
1781 if (tk instanceof SunToolkit) {
1782 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1783 }
1784 }
1785 }
1786 }
1787
1788 /* "false", "off", ""default" aren't explicitly tested, they
1789 * just fall through to produce a null return which all are equated to
1790 * "false".
1791 */
1792 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1793 Object aaHint = null;
1794 hintname = hintname.toLowerCase(Locale.ENGLISH);
1795 if (hintname.equals("on")) {
1796 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1797 } else if (hintname.equals("gasp")) {
1798 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1799 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1800 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1801 } else if (hintname.equals("lcd_hbgr")) {
1802 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1803 } else if (hintname.equals("lcd_vrgb")) {
1804 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1805 } else if (hintname.equals("lcd_vbgr")) {
1806 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1807 }
1808 if (aaHint != null) {
1809 RenderingHints map = new RenderingHints(null);
1810 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1811 return map;
1812 } else {
1813 return null;
1814 }
1815 }
1816
1817 /* This method determines whether to use the system font settings,
1818 * or ignore them if a L&F has specified they should be ignored, or
1819 * to override both of these with a system property specified value.
1820 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1821 * system property isn't applied as desktop properties are considered
1822 * to be inapplicable in that case. In that headless case although
1823 * this method will return "true" the toolkit will return a null map.
1824 */
1825 private static boolean useSystemAAFontSettings() {
1826 if (!checkedSystemAAFontSettings) {
1827 useSystemAAFontSettings = true; /* initially set this true */
1828 String systemAAFonts = null;
1829 Toolkit tk = Toolkit.getDefaultToolkit();
1830 if (tk instanceof SunToolkit) {
1831 systemAAFonts =
1832 AccessController.doPrivileged(
1833 new GetPropertyAction("awt.useSystemAAFontSettings"));
1834 }
1835 if (systemAAFonts != null) {
1836 useSystemAAFontSettings =
1837 Boolean.valueOf(systemAAFonts).booleanValue();
1838 /* If it is anything other than "true", then it may be
1839 * a hint name , or it may be "off, "default", etc.
1840 */
1841 if (!useSystemAAFontSettings) {
1842 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1843 }
1844 }
1845 /* If its still true, apply the extra condition */
1846 if (useSystemAAFontSettings) {
1847 useSystemAAFontSettings = lastExtraCondition;
1848 }
1849 checkedSystemAAFontSettings = true;
1850 }
1851 return useSystemAAFontSettings;
1852 }
1853
1854 /* A variable defined for the convenience of JDK code */
1855 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1856
1857 /* Overridden by subclasses to return platform/desktop specific values */
1858 protected RenderingHints getDesktopAAHints() {
1859 return null;
1860 }
1861
1862 /* Subclass desktop property loading methods call this which
1863 * in turn calls the appropriate subclass implementation of
1864 * getDesktopAAHints() when system settings are being used.
1865 * Its public rather than protected because subclasses may delegate
1866 * to a helper class.
1867 */
1868 public static RenderingHints getDesktopFontHints() {
1869 if (useSystemAAFontSettings()) {
1870 Toolkit tk = Toolkit.getDefaultToolkit();
1871 if (tk instanceof SunToolkit) {
1872 Object map = ((SunToolkit)tk).getDesktopAAHints();
1873 return (RenderingHints)map;
1874 } else { /* Headless Toolkit */
1875 return null;
1876 }
1877 } else if (desktopFontHints != null) {
1878 /* cloning not necessary as the return value is cloned later, but
1879 * its harmless.
1880 */
1881 return (RenderingHints)(desktopFontHints.clone());
1882 } else {
1883 return null;
1884 }
1885 }
1886
1887
1888 public abstract boolean isDesktopSupported();
1889
1890 /*
1891 * consumeNextKeyTyped() method is not currently used,
1892 * however Swing could use it in the future.
1893 */
1894 private static Method consumeNextKeyTypedMethod = null;
1895 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1896 if (consumeNextKeyTypedMethod == null) {
1897 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1898 "consumeNextKeyTyped",
1899 new Class<?>[] {KeyEvent.class});
1900 }
1901 try {
1902 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1903 keyEvent);
1904 } catch (IllegalAccessException iae) {
1905 iae.printStackTrace();
1906 } catch (InvocationTargetException ite) {
1907 ite.printStackTrace();
1908 }
1909 }
1910
1911 protected static void dumpPeers(final PlatformLogger aLog) {
1912 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1913 }
1914
1915 /**
1916 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1917 * @return Window ancestor of the component or component by itself if it is Window;
1918 * null, if component is not a part of window hierarchy
1919 */
1920 public static Window getContainingWindow(Component comp) {
1921 while (comp != null && !(comp instanceof Window)) {
1922 comp = comp.getParent();
1923 }
1924 return (Window)comp;
1925 }
1926
1927 /**
1928 * Returns the value of the system property indicated by the specified key.
1929 */
1930 public static String getSystemProperty(final String key) {
1931 return AccessController.doPrivileged(new PrivilegedAction<String>() {
1932 public String run() {
1933 return System.getProperty(key);
1934 }
1935 });
1936 }
1937
1938 /**
1939 * Returns the boolean value of the system property indicated by the specified key.
1940 */
1941 protected static Boolean getBooleanSystemProperty(String key) {
1942 return AccessController.doPrivileged(new GetBooleanAction(key));
1943 }
1944
1945 private static Boolean sunAwtDisableMixing = null;
1946
1947 /**
1948 * Returns the value of "sun.awt.disableMixing" property. Default
1949 * value is {@code false}.
1950 */
1951 public synchronized static boolean getSunAwtDisableMixing() {
1952 if (sunAwtDisableMixing == null) {
1953 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1954 }
1955 return sunAwtDisableMixing.booleanValue();
1956 }
1957
1958 /**
1959 * Returns true if the native GTK libraries are available. The
1960 * default implementation returns false, but UNIXToolkit overrides this
1961 * method to provide a more specific answer.
1962 */
1963 public boolean isNativeGTKAvailable() {
1964 return false;
1965 }
1966
1967 // Cosntant alpha
1968 public boolean isWindowOpacitySupported() {
1969 return false;
1970 }
1971
1972 // Shaping
1973 public boolean isWindowShapingSupported() {
1974 return false;
1975 }
1976
1977 // Per-pixel alpha
1978 public boolean isWindowTranslucencySupported() {
1979 return false;
1980 }
1981
1982 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1983 return false;
1984 }
1985
1986 /**
1987 * Returns true if swing backbuffer should be translucent.
1988 */
1989 public boolean isSwingBackbufferTranslucencySupported() {
1990 return false;
1991 }
1992
1993 /**
1994 * Returns whether or not a containing top level window for the passed
1995 * component is
1996 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1997 *
1998 * @param c a Component which toplevel's to check
1999 * @return {@code true} if the passed component is not null and has a
2000 * containing toplevel window which is opaque (so per-pixel translucency
2001 * is not enabled), {@code false} otherwise
2002 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
2003 */
2004 public static boolean isContainingTopLevelOpaque(Component c) {
2005 Window w = getContainingWindow(c);
2006 return w != null && w.isOpaque();
2007 }
2008
2009 /**
2010 * Returns whether or not a containing top level window for the passed
2011 * component is
2012 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2013 *
2014 * @param c a Component which toplevel's to check
2015 * @return {@code true} if the passed component is not null and has a
2016 * containing toplevel window which has opacity less than
2017 * 1.0f (which means that it is translucent), {@code false} otherwise
2018 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2019 */
2020 public static boolean isContainingTopLevelTranslucent(Component c) {
2021 Window w = getContainingWindow(c);
2022 return w != null && w.getOpacity() < 1.0f;
2023 }
2024
2025 /**
2026 * Returns whether the native system requires using the peer.updateWindow()
2027 * method to update the contents of a non-opaque window, or if usual
2028 * painting procedures are sufficient. The default return value covers
2029 * the X11 systems. On MS Windows this method is overriden in WToolkit
2030 * to return true.
2031 */
2032 public boolean needUpdateWindow() {
2033 return false;
2034 }
2035
2036 /**
2037 * Descendants of the SunToolkit should override and put their own logic here.
2038 */
2039 public int getNumberOfButtons(){
2040 return 3;
2041 }
2042
2043 /**
2044 * Checks that the given object implements/extends the given
2045 * interface/class.
2046 *
2047 * Note that using the instanceof operator causes a class to be loaded.
2048 * Using this method doesn't load a class and it can be used instead of
2049 * the instanceof operator for performance reasons.
2050 *
2051 * @param obj Object to be checked
2052 * @param type The name of the interface/class. Must be
2053 * fully-qualified interface/class name.
2054 * @return true, if this object implements/extends the given
2055 * interface/class, false, otherwise, or if obj or type is null
2056 */
2057 public static boolean isInstanceOf(Object obj, String type) {
2058 if (obj == null) return false;
2059 if (type == null) return false;
2060
2061 return isInstanceOf(obj.getClass(), type);
2062 }
2063
2064 private static boolean isInstanceOf(Class<?> cls, String type) {
2065 if (cls == null) return false;
2066
2067 if (cls.getName().equals(type)) {
2068 return true;
2069 }
2070
2071 for (Class<?> c : cls.getInterfaces()) {
2072 if (c.getName().equals(type)) {
2073 return true;
2074 }
2075 }
2076 return isInstanceOf(cls.getSuperclass(), type);
2077 }
2078
2079 ///////////////////////////////////////////////////////////////////////////
2080 //
2081 // The following methods help set and identify whether a particular
2082 // AWTEvent object was produced by the system or by user code. As of this
2083 // writing the only consumer is the Java Plug-In, although this information
2084 // could be useful to more clients and probably should be formalized in
2085 // the public API.
2086 //
2087 ///////////////////////////////////////////////////////////////////////////
2088
2089 public static void setSystemGenerated(AWTEvent e) {
2090 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2091 }
2092
2093 public static boolean isSystemGenerated(AWTEvent e) {
2094 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2095 }
2096
2097 } // class SunToolkit
2098
2099
2100 /*
2101 * PostEventQueue is a Thread that runs in the same AppContext as the
2102 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2103 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2104 * events to this queue, which then calls EventQueue.postEvent().
2105 *
2106 * We do this because EventQueue.postEvent() may be overridden by client
2107 * code, and we mustn't ever call client code from the toolkit thread.
2108 */
2109 class PostEventQueue {
2110 private EventQueueItem queueHead = null;
2111 private EventQueueItem queueTail = null;
2112 private final EventQueue eventQueue;
2113
2114 // For the case when queue is cleared but events are not posted
2115 private volatile boolean isFlushing = false;
2116
2117 PostEventQueue(EventQueue eq) {
2118 eventQueue = eq;
2119 }
2120
2121 public synchronized boolean noEvents() {
2122 return queueHead == null && !isFlushing;
2123 }
2124
2125 /*
2126 * Continually post pending AWTEvents to the Java EventQueue. The method
2127 * is synchronized to ensure the flush is completed before a new event
2128 * can be posted to this queue.
2129 *
2130 * 7177040: The method couldn't be wholly synchronized because of calls
2131 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2132 * potentially lead to deadlock
2133 */
2134 public void flush() {
2135 EventQueueItem tempQueue;
2136 synchronized (this) {
2137 tempQueue = queueHead;
2138 queueHead = queueTail = null;
2139 isFlushing = true;
2140 }
2141 try {
2142 while (tempQueue != null) {
2143 eventQueue.postEvent(tempQueue.event);
2144 tempQueue = tempQueue.next;
2145 }
2146 }
2147 finally {
2148 isFlushing = false;
2149 }
2150 }
2151
2152 /*
2153 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2154 */
2155 void postEvent(AWTEvent event) {
2156 EventQueueItem item = new EventQueueItem(event);
2157
2158 synchronized (this) {
2159 if (queueHead == null) {
2160 queueHead = queueTail = item;
2161 } else {
2162 queueTail.next = item;
2163 queueTail = item;
2164 }
2165 }
2166 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2167 }
2168 } // class PostEventQueue