1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.net.URL;
40 import java.util.*;
41 import java.util.concurrent.TimeUnit;
42 import java.util.concurrent.locks.Condition;
43 import java.util.concurrent.locks.Lock;
44 import java.util.concurrent.locks.ReentrantLock;
45
46 import sun.security.util.SecurityConstants;
47 import sun.util.logging.PlatformLogger;
48 import sun.misc.SoftCache;
49 import sun.font.FontDesignMetrics;
50 import sun.awt.im.InputContext;
51 import sun.awt.image.*;
52 import sun.security.action.GetPropertyAction;
53 import sun.security.action.GetBooleanAction;
54 import java.lang.reflect.Field;
55 import java.lang.reflect.Method;
56 import java.lang.reflect.Constructor;
57 import java.lang.reflect.InvocationTargetException;
58 import java.security.AccessController;
59 import java.security.PrivilegedAction;
60 import java.security.PrivilegedActionException;
61 import java.security.PrivilegedExceptionAction;
62
63 public abstract class SunToolkit extends Toolkit
64 implements WindowClosingSupport, WindowClosingListener,
65 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
66
67 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunToolkit");
68
69 /* Load debug settings for native code */
70 static {
71 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
72 DebugSettings.init();
73 }
74 };
75
76 /**
77 * Special mask for the UngrabEvent events, in addition to the
78 * public masks defined in AWTEvent. Should be used as the mask
79 * value for Toolkit.addAWTEventListener.
80 */
81 public static final int GRAB_EVENT_MASK = 0x80000000;
82
83 private static Method wakeupMethod;
84 /* The key to put()/get() the PostEventQueue into/from the AppContext.
85 */
86 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
87
88 /**
89 * Number of buttons.
90 * By default it's taken from the system. If system value does not
91 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
92 */
93 protected static int numberOfButtons = 0;
94
95
96 /* XFree standard mention 24 buttons as maximum:
97 * http://www.xfree86.org/current/mouse.4.html
98 * We workaround systems supporting more than 24 buttons.
99 * Otherwise, we have to use long type values as masks
100 * which leads to API change.
101 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
102 * the 4-bytes limit for the int type. (CR 6799099)
103 * One more bit is reserved for FIRST_HIGH_BIT.
104 */
105 public final static int MAX_BUTTONS_SUPPORTED = 20;
106
107 private static void initEQ(AppContext appContext) {
108 EventQueue eventQueue;
109
110 String eqName = System.getProperty("AWT.EventQueueClass",
111 "java.awt.EventQueue");
112
113 try {
114 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
115 } catch (Exception e) {
116 e.printStackTrace();
117 System.err.println("Failed loading " + eqName + ": " + e);
118 eventQueue = new EventQueue();
119 }
120 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
121
122 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
123 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
124 }
125
126 public SunToolkit() {
127 // 7122796: Always create an EQ for the main AppContext
128 initEQ(AppContext.getMainAppContext());
129 }
130
131 public boolean useBufferPerWindow() {
132 return false;
133 }
134
135 public abstract WindowPeer createWindow(Window target)
136 throws HeadlessException;
137
138 public abstract FramePeer createFrame(Frame target)
139 throws HeadlessException;
140
141 public abstract DialogPeer createDialog(Dialog target)
142 throws HeadlessException;
143
144 public abstract ButtonPeer createButton(Button target)
145 throws HeadlessException;
146
147 public abstract TextFieldPeer createTextField(TextField target)
148 throws HeadlessException;
149
150 public abstract ChoicePeer createChoice(Choice target)
151 throws HeadlessException;
152
153 public abstract LabelPeer createLabel(Label target)
154 throws HeadlessException;
155
156 public abstract ListPeer createList(java.awt.List target)
157 throws HeadlessException;
158
159 public abstract CheckboxPeer createCheckbox(Checkbox target)
160 throws HeadlessException;
161
162 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
163 throws HeadlessException;
164
165 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
166 throws HeadlessException;
167
168 public abstract TextAreaPeer createTextArea(TextArea target)
169 throws HeadlessException;
170
171 public abstract FileDialogPeer createFileDialog(FileDialog target)
172 throws HeadlessException;
173
174 public abstract MenuBarPeer createMenuBar(MenuBar target)
175 throws HeadlessException;
176
177 public abstract MenuPeer createMenu(Menu target)
178 throws HeadlessException;
179
180 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
181 throws HeadlessException;
182
183 public abstract MenuItemPeer createMenuItem(MenuItem target)
184 throws HeadlessException;
185
186 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
187 CheckboxMenuItem target)
188 throws HeadlessException;
189
190 public abstract DragSourceContextPeer createDragSourceContextPeer(
191 DragGestureEvent dge)
192 throws InvalidDnDOperationException;
193
194 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
195 throws HeadlessException, AWTException;
196
197 public abstract SystemTrayPeer createSystemTray(SystemTray target);
198
199 public abstract boolean isTraySupported();
200
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 createKeyboardFocusManagerPeer(KeyboardFocusManager manager)
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 = (Method)AccessController.doPrivileged(new PrivilegedAction(){
318 public Object 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 appContextMap =
379 Collections.synchronizedMap(new WeakHashMap());
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 = (AppContext)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 int flushNestingLevel = 0;
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 ++flushNestingLevel;
558 if (flushNestingLevel == 1) {
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 --flushNestingLevel;
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 public static void executeOnEventHandlerThread(Object target,
598 Runnable runnable,
599 final long when) {
600 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT){
601 public long getWhen(){
602 return when;
603 }
604 });
605 }
606
607 /*
608 * Execute a chunk of code on the Java event handler thread for the
609 * given target. Does not wait for the execution to occur before
610 * returning to the caller.
611 */
612 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
613 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
614 }
615
616 /*
617 * Execute a chunk of code on the Java event handler thread. The
618 * method takes into account provided AppContext and sets
619 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
620 * event. See 6451487 for detailes.
621 * Does not wait for the execution to occur before returning to
622 * the caller.
623 */
624 public static void invokeLaterOnAppContext(
625 AppContext appContext, Runnable dispatcher)
626 {
627 postEvent(appContext,
628 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
629 PeerEvent.PRIORITY_EVENT));
630 }
631
632 /*
633 * Execute a chunk of code on the Java event handler thread for the
634 * given target. Waits for the execution to occur before returning
635 * to the caller.
636 */
637 public static void executeOnEDTAndWait(Object target, Runnable runnable)
638 throws InterruptedException, InvocationTargetException
639 {
640 if (EventQueue.isDispatchThread()) {
641 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
642 }
643
644 class AWTInvocationLock {}
645 Object lock = new AWTInvocationLock();
646
647 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
648
649 synchronized (lock) {
650 executeOnEventHandlerThread(event);
651 while(!event.isDispatched()) {
652 lock.wait();
653 }
654 }
655
656 Throwable eventThrowable = event.getThrowable();
657 if (eventThrowable != null) {
658 throw new InvocationTargetException(eventThrowable);
659 }
660 }
661
662 /*
663 * Returns true if the calling thread is the event dispatch thread
664 * contained within AppContext which associated with the given target.
665 * Use this call to ensure that a given task is being executed
666 * (or not being) on the event dispatch thread for the given target.
667 */
668 public static boolean isDispatchThreadForAppContext(Object target) {
669 AppContext appContext = targetToAppContext(target);
670 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
671
672 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
673 return accessor.isDispatchThreadImpl(eq);
674 }
675
676 public Dimension getScreenSize() {
677 return new Dimension(getScreenWidth(), getScreenHeight());
678 }
679 protected abstract int getScreenWidth();
680 protected abstract int getScreenHeight();
681
682 public FontMetrics getFontMetrics(Font font) {
683 return FontDesignMetrics.getMetrics(font);
684 }
685
686 public String[] getFontList() {
687 String[] hardwiredFontList = {
688 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
689 Font.DIALOG_INPUT
690
691 // -- Obsolete font names from 1.0.2. It was decided that
692 // -- getFontList should not return these old names:
693 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
694 };
695 return hardwiredFontList;
696 }
697
698 public PanelPeer createPanel(Panel target) {
699 return (PanelPeer)createComponent(target);
700 }
701
702 public CanvasPeer createCanvas(Canvas target) {
703 return (CanvasPeer)createComponent(target);
704 }
705
706 /**
707 * Disables erasing of background on the canvas before painting if
708 * this is supported by the current toolkit. It is recommended to
709 * call this method early, before the Canvas becomes displayable,
710 * because some Toolkit implementations do not support changing
711 * this property once the Canvas becomes displayable.
712 */
713 public void disableBackgroundErase(Canvas canvas) {
714 disableBackgroundEraseImpl(canvas);
715 }
716
717 /**
718 * Disables the native erasing of the background on the given
719 * component before painting if this is supported by the current
720 * toolkit. This only has an effect for certain components such as
721 * Canvas, Panel and Window. It is recommended to call this method
722 * early, before the Component becomes displayable, because some
723 * Toolkit implementations do not support changing this property
724 * once the Component becomes displayable.
725 */
726 public void disableBackgroundErase(Component component) {
727 disableBackgroundEraseImpl(component);
728 }
729
730 private void disableBackgroundEraseImpl(Component component) {
731 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
732 }
733
734 /**
735 * Returns the value of "sun.awt.noerasebackground" property. Default
736 * value is {@code false}.
737 */
738 public static boolean getSunAwtNoerasebackground() {
739 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
740 }
741
742 /**
743 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
744 * value is {@code false}.
745 */
746 public static boolean getSunAwtErasebackgroundonresize() {
747 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
748 }
749
750
751 static final SoftCache imgCache = new SoftCache();
752
753 static Image getImageFromHash(Toolkit tk, URL url) {
754 SecurityManager sm = System.getSecurityManager();
755 if (sm != null) {
756 try {
757 java.security.Permission perm =
758 url.openConnection().getPermission();
759 if (perm != null) {
760 try {
761 sm.checkPermission(perm);
762 } catch (SecurityException se) {
763 // fallback to checkRead/checkConnect for pre 1.2
764 // security managers
765 if ((perm instanceof java.io.FilePermission) &&
766 perm.getActions().indexOf("read") != -1) {
767 sm.checkRead(perm.getName());
768 } else if ((perm instanceof
769 java.net.SocketPermission) &&
770 perm.getActions().indexOf("connect") != -1) {
771 sm.checkConnect(url.getHost(), url.getPort());
772 } else {
773 throw se;
774 }
775 }
776 }
777 } catch (java.io.IOException ioe) {
778 sm.checkConnect(url.getHost(), url.getPort());
779 }
780 }
781 synchronized (imgCache) {
782 Image img = (Image)imgCache.get(url);
783 if (img == null) {
784 try {
785 img = tk.createImage(new URLImageSource(url));
786 imgCache.put(url, img);
787 } catch (Exception e) {
788 }
789 }
790 return img;
791 }
792 }
793
794 static Image getImageFromHash(Toolkit tk,
795 String filename) {
796 SecurityManager security = System.getSecurityManager();
797 if (security != null) {
798 security.checkRead(filename);
799 }
800 synchronized (imgCache) {
801 Image img = (Image)imgCache.get(filename);
802 if (img == null) {
803 try {
804 img = tk.createImage(new FileImageSource(filename));
805 imgCache.put(filename, img);
806 } catch (Exception e) {
807 }
808 }
809 return img;
810 }
811 }
812
813 public Image getImage(String filename) {
814 return getImageFromHash(this, filename);
815 }
816
817 public Image getImage(URL url) {
818 return getImageFromHash(this, url);
819 }
820
821 public Image createImage(String filename) {
822 SecurityManager security = System.getSecurityManager();
823 if (security != null) {
824 security.checkRead(filename);
825 }
826 return createImage(new FileImageSource(filename));
827 }
828
829 public Image createImage(URL url) {
830 SecurityManager sm = System.getSecurityManager();
831 if (sm != null) {
832 try {
833 java.security.Permission perm =
834 url.openConnection().getPermission();
835 if (perm != null) {
836 try {
837 sm.checkPermission(perm);
838 } catch (SecurityException se) {
839 // fallback to checkRead/checkConnect for pre 1.2
840 // security managers
841 if ((perm instanceof java.io.FilePermission) &&
842 perm.getActions().indexOf("read") != -1) {
843 sm.checkRead(perm.getName());
844 } else if ((perm instanceof
845 java.net.SocketPermission) &&
846 perm.getActions().indexOf("connect") != -1) {
847 sm.checkConnect(url.getHost(), url.getPort());
848 } else {
849 throw se;
850 }
851 }
852 }
853 } catch (java.io.IOException ioe) {
854 sm.checkConnect(url.getHost(), url.getPort());
855 }
856 }
857 return createImage(new URLImageSource(url));
858 }
859
860 public Image createImage(byte[] data, int offset, int length) {
861 return createImage(new ByteArrayImageSource(data, offset, length));
862 }
863
864 public Image createImage(ImageProducer producer) {
865 return new ToolkitImage(producer);
866 }
867
868 public int checkImage(Image img, int w, int h, ImageObserver o) {
869 if (!(img instanceof ToolkitImage)) {
870 return ImageObserver.ALLBITS;
871 }
872
873 ToolkitImage tkimg = (ToolkitImage)img;
874 int repbits;
875 if (w == 0 || h == 0) {
876 repbits = ImageObserver.ALLBITS;
877 } else {
878 repbits = tkimg.getImageRep().check(o);
879 }
880 return tkimg.check(o) | repbits;
881 }
882
883 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
884 if (w == 0 || h == 0) {
885 return true;
886 }
887
888 // Must be a ToolkitImage
889 if (!(img instanceof ToolkitImage)) {
890 return true;
891 }
892
893 ToolkitImage tkimg = (ToolkitImage)img;
894 if (tkimg.hasError()) {
895 if (o != null) {
896 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
897 -1, -1, -1, -1);
898 }
899 return false;
900 }
901 ImageRepresentation ir = tkimg.getImageRep();
902 return ir.prepare(o);
903 }
904
905 /**
906 * Scans {@code imageList} for best-looking image of specified dimensions.
907 * Image can be scaled and/or padded with transparency.
908 */
909 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
910 if (width == 0 || height == 0) {
911 return null;
912 }
913 Image bestImage = null;
914 int bestWidth = 0;
915 int bestHeight = 0;
916 double bestSimilarity = 3; //Impossibly high value
917 double bestScaleFactor = 0;
918 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
919 //Iterate imageList looking for best matching image.
920 //'Similarity' measure is defined as good scale factor and small insets.
921 //best possible similarity is 0 (no scale, no insets).
922 //It's found while the experiments that good-looking result is achieved
923 //with scale factors x1, x3/4, x2/3, xN, x1/N.
924 Image im = i.next();
925 if (im == null) {
926 if (log.isLoggable(PlatformLogger.FINER)) {
927 log.finer("SunToolkit.getScaledIconImage: " +
928 "Skipping the image passed into Java because it's null.");
929 }
930 continue;
931 }
932 if (im instanceof ToolkitImage) {
933 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
934 ir.reconstruct(ImageObserver.ALLBITS);
935 }
936 int iw;
937 int ih;
938 try {
939 iw = im.getWidth(null);
940 ih = im.getHeight(null);
941 } catch (Exception e){
942 if (log.isLoggable(PlatformLogger.FINER)) {
943 log.finer("SunToolkit.getScaledIconImage: " +
944 "Perhaps the image passed into Java is broken. Skipping this icon.");
945 }
946 continue;
947 }
948 if (iw > 0 && ih > 0) {
949 //Calc scale factor
950 double scaleFactor = Math.min((double)width / (double)iw,
951 (double)height / (double)ih);
952 //Calculate scaled image dimensions
953 //adjusting scale factor to nearest "good" value
954 int adjw = 0;
955 int adjh = 0;
956 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
957 if (scaleFactor >= 2) {
958 //Need to enlarge image more than twice
959 //Round down scale factor to multiply by integer value
960 scaleFactor = Math.floor(scaleFactor);
961 adjw = iw * (int)scaleFactor;
962 adjh = ih * (int)scaleFactor;
963 scaleMeasure = 1.0 - 0.5 / scaleFactor;
964 } else if (scaleFactor >= 1) {
965 //Don't scale
966 scaleFactor = 1.0;
967 adjw = iw;
968 adjh = ih;
969 scaleMeasure = 0;
970 } else if (scaleFactor >= 0.75) {
971 //Multiply by 3/4
972 scaleFactor = 0.75;
973 adjw = iw * 3 / 4;
974 adjh = ih * 3 / 4;
975 scaleMeasure = 0.3;
976 } else if (scaleFactor >= 0.6666) {
977 //Multiply by 2/3
978 scaleFactor = 0.6666;
979 adjw = iw * 2 / 3;
980 adjh = ih * 2 / 3;
981 scaleMeasure = 0.33;
982 } else {
983 //Multiply size by 1/scaleDivider
984 //where scaleDivider is minimum possible integer
985 //larger than 1/scaleFactor
986 double scaleDivider = Math.ceil(1.0 / scaleFactor);
987 scaleFactor = 1.0 / scaleDivider;
988 adjw = (int)Math.round((double)iw / scaleDivider);
989 adjh = (int)Math.round((double)ih / scaleDivider);
990 scaleMeasure = 1.0 - 1.0 / scaleDivider;
991 }
992 double similarity = ((double)width - (double)adjw) / (double)width +
993 ((double)height - (double)adjh) / (double)height + //Large padding is bad
994 scaleMeasure; //Large rescale is bad
995 if (similarity < bestSimilarity) {
996 bestSimilarity = similarity;
997 bestScaleFactor = scaleFactor;
998 bestImage = im;
999 bestWidth = adjw;
1000 bestHeight = adjh;
1001 }
1002 if (similarity == 0) break;
1003 }
1004 }
1005 if (bestImage == null) {
1006 //No images were found, possibly all are broken
1007 return null;
1008 }
1009 BufferedImage bimage =
1010 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1011 Graphics2D g = bimage.createGraphics();
1012 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1013 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1014 try {
1015 int x = (width - bestWidth) / 2;
1016 int y = (height - bestHeight) / 2;
1017 if (log.isLoggable(PlatformLogger.FINER)) {
1018 log.finer("WWindowPeer.getScaledIconData() result : " +
1019 "w : " + width + " h : " + height +
1020 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1021 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1022 " adjW : " + bestWidth + " adjH : " + bestHeight +
1023 " x : " + x + " y : " + y);
1024 }
1025 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1026 } finally {
1027 g.dispose();
1028 }
1029 return bimage;
1030 }
1031
1032 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1033 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1034 if (bimage == null) {
1035 if (log.isLoggable(PlatformLogger.FINER)) {
1036 log.finer("SunToolkit.getScaledIconData: " +
1037 "Perhaps the image passed into Java is broken. Skipping this icon.");
1038 }
1039 return null;
1040 }
1041 Raster raster = bimage.getRaster();
1042 DataBuffer buffer = raster.getDataBuffer();
1043 return (DataBufferInt)buffer;
1044 }
1045
1046 protected EventQueue getSystemEventQueueImpl() {
1047 return getSystemEventQueueImplPP();
1048 }
1049
1050 // Package private implementation
1051 static EventQueue getSystemEventQueueImplPP() {
1052 return getSystemEventQueueImplPP(AppContext.getAppContext());
1053 }
1054
1055 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1056 EventQueue theEventQueue =
1057 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1058 return theEventQueue;
1059 }
1060
1061 /**
1062 * Give native peers the ability to query the native container
1063 * given a native component (eg the direct parent may be lightweight).
1064 */
1065 public static Container getNativeContainer(Component c) {
1066 return Toolkit.getNativeContainer(c);
1067 }
1068
1069 /**
1070 * Gives native peers the ability to query the closest HW component.
1071 * If the given component is heavyweight, then it returns this. Otherwise,
1072 * it goes one level up in the hierarchy and tests next component.
1073 */
1074 public static Component getHeavyweightComponent(Component c) {
1075 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1076 c = AWTAccessor.getComponentAccessor().getParent(c);
1077 }
1078 return c;
1079 }
1080
1081 /**
1082 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1083 */
1084 public int getFocusAcceleratorKeyMask() {
1085 return InputEvent.ALT_MASK;
1086 }
1087
1088 /**
1089 * Tests whether specified key modifiers mask can be used to enter a printable
1090 * character. This is a default implementation of this method, which reflects
1091 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1092 * characters from the extended character set (like euro sign or math symbols)
1093 */
1094 public boolean isPrintableCharacterModifiersMask(int mods) {
1095 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1096 }
1097
1098 /**
1099 * Returns whether popup is allowed to be shown above the task bar.
1100 * This is a default implementation of this method, which checks
1101 * corresponding security permission.
1102 */
1103 public boolean canPopupOverlapTaskBar() {
1104 boolean result = true;
1105 try {
1106 SecurityManager sm = System.getSecurityManager();
1107 if (sm != null) {
1108 sm.checkPermission(
1109 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1110 }
1111 } catch (SecurityException se) {
1112 // There is no permission to show popups over the task bar
1113 result = false;
1114 }
1115 return result;
1116 }
1117
1118 /**
1119 * Returns a new input method window, with behavior as specified in
1120 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1121 * If the inputContext is not null, the window should return it from its
1122 * getInputContext() method. The window needs to implement
1123 * sun.awt.im.InputMethodWindow.
1124 * <p>
1125 * SunToolkit subclasses can override this method to return better input
1126 * method windows.
1127 */
1128 public Window createInputMethodWindow(String title, InputContext context) {
1129 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1130 }
1131
1132 /**
1133 * Returns whether enableInputMethods should be set to true for peered
1134 * TextComponent instances on this platform. False by default.
1135 */
1136 public boolean enableInputMethodsForTextComponent() {
1137 return false;
1138 }
1139
1140 private static Locale startupLocale = null;
1141
1142 /**
1143 * Returns the locale in which the runtime was started.
1144 */
1145 public static Locale getStartupLocale() {
1146 if (startupLocale == null) {
1147 String language, region, country, variant;
1148 language = (String) AccessController.doPrivileged(
1149 new GetPropertyAction("user.language", "en"));
1150 // for compatibility, check for old user.region property
1151 region = (String) AccessController.doPrivileged(
1152 new GetPropertyAction("user.region"));
1153 if (region != null) {
1154 // region can be of form country, country_variant, or _variant
1155 int i = region.indexOf('_');
1156 if (i >= 0) {
1157 country = region.substring(0, i);
1158 variant = region.substring(i + 1);
1159 } else {
1160 country = region;
1161 variant = "";
1162 }
1163 } else {
1164 country = (String) AccessController.doPrivileged(
1165 new GetPropertyAction("user.country", ""));
1166 variant = (String) AccessController.doPrivileged(
1167 new GetPropertyAction("user.variant", ""));
1168 }
1169 startupLocale = new Locale(language, country, variant);
1170 }
1171 return startupLocale;
1172 }
1173
1174 /**
1175 * Returns the default keyboard locale of the underlying operating system
1176 */
1177 public Locale getDefaultKeyboardLocale() {
1178 return getStartupLocale();
1179 }
1180
1181 private static String dataTransfererClassName = null;
1182
1183 protected static void setDataTransfererClassName(String className) {
1184 dataTransfererClassName = className;
1185 }
1186
1187 public static String getDataTransfererClassName() {
1188 if (dataTransfererClassName == null) {
1189 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1190 }
1191 return dataTransfererClassName;
1192 }
1193
1194 // Support for window closing event notifications
1195 private transient WindowClosingListener windowClosingListener = null;
1196 /**
1197 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1198 */
1199 public WindowClosingListener getWindowClosingListener() {
1200 return windowClosingListener;
1201 }
1202 /**
1203 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1204 */
1205 public void setWindowClosingListener(WindowClosingListener wcl) {
1206 windowClosingListener = wcl;
1207 }
1208
1209 /**
1210 * @see sun.awt.WindowClosingListener#windowClosingNotify
1211 */
1212 public RuntimeException windowClosingNotify(WindowEvent event) {
1213 if (windowClosingListener != null) {
1214 return windowClosingListener.windowClosingNotify(event);
1215 } else {
1216 return null;
1217 }
1218 }
1219 /**
1220 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1221 */
1222 public RuntimeException windowClosingDelivered(WindowEvent event) {
1223 if (windowClosingListener != null) {
1224 return windowClosingListener.windowClosingDelivered(event);
1225 } else {
1226 return null;
1227 }
1228 }
1229
1230 private static DefaultMouseInfoPeer mPeer = null;
1231
1232 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1233 if (mPeer == null) {
1234 mPeer = new DefaultMouseInfoPeer();
1235 }
1236 return mPeer;
1237 }
1238
1239
1240 /**
1241 * Returns whether default toolkit needs the support of the xembed
1242 * from embedding host(if any).
1243 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1244 */
1245 public static boolean needsXEmbed() {
1246 String noxembed = (String) AccessController.
1247 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1248 if ("true".equals(noxembed)) {
1249 return false;
1250 }
1251
1252 Toolkit tk = Toolkit.getDefaultToolkit();
1253 if (tk instanceof SunToolkit) {
1254 // SunToolkit descendants should override this method to specify
1255 // concrete behavior
1256 return ((SunToolkit)tk).needsXEmbedImpl();
1257 } else {
1258 // Non-SunToolkit doubtly might support XEmbed
1259 return false;
1260 }
1261 }
1262
1263 /**
1264 * Returns whether this toolkit needs the support of the xembed
1265 * from embedding host(if any).
1266 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1267 */
1268 protected boolean needsXEmbedImpl() {
1269 return false;
1270 }
1271
1272 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1273
1274 /**
1275 * Returns whether the XEmbed server feature is requested by
1276 * developer. If true, Toolkit should return an
1277 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1278 */
1279 protected final boolean isXEmbedServerRequested() {
1280 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1281 }
1282
1283 /**
1284 * Returns whether the modal exclusion API is supported by the current toolkit.
1285 * When it isn't supported, calling <code>setModalExcluded</code> has no
1286 * effect, and <code>isModalExcluded</code> returns false for all windows.
1287 *
1288 * @return true if modal exclusion is supported by the toolkit, false otherwise
1289 *
1290 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1291 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1292 *
1293 * @since 1.5
1294 */
1295 public static boolean isModalExcludedSupported()
1296 {
1297 Toolkit tk = Toolkit.getDefaultToolkit();
1298 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1299 }
1300 /*
1301 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1302 *
1303 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1304 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1305 *
1306 * @since 1.5
1307 */
1308 protected boolean isModalExcludedSupportedImpl()
1309 {
1310 return false;
1311 }
1312
1313 /*
1314 * Sets this window to be excluded from being modally blocked. When the
1315 * toolkit supports modal exclusion and this method is called, input
1316 * events, focus transfer and z-order will continue to work for the
1317 * window, it's owned windows and child components, even in the
1318 * presence of a modal dialog.
1319 * For details on which <code>Window</code>s are normally blocked
1320 * by modal dialog, see {@link java.awt.Dialog}.
1321 * Invoking this method when the modal exclusion API is not supported by
1322 * the current toolkit has no effect.
1323 * @param window Window to be marked as not modally blocked
1324 * @see java.awt.Dialog
1325 * @see java.awt.Dialog#setModal(boolean)
1326 * @see sun.awt.SunToolkit#isModalExcludedSupported
1327 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1328 */
1329 public static void setModalExcluded(Window window)
1330 {
1331 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1332 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1333 }
1334 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1335 }
1336
1337 /*
1338 * Returns whether the specified window is blocked by modal dialogs.
1339 * If the modal exclusion API isn't supported by the current toolkit,
1340 * it returns false for all windows.
1341 *
1342 * @param window Window to test for modal exclusion
1343 *
1344 * @return true if the window is modal excluded, false otherwise. If
1345 * the modal exclusion isn't supported by the current Toolkit, false
1346 * is returned
1347 *
1348 * @see sun.awt.SunToolkit#isModalExcludedSupported
1349 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1350 *
1351 * @since 1.5
1352 */
1353 public static boolean isModalExcluded(Window window)
1354 {
1355 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1356 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1357 }
1358 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1359 }
1360
1361 /**
1362 * Overridden in XToolkit and WToolkit
1363 */
1364 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1365 return (modalityType == Dialog.ModalityType.MODELESS) ||
1366 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1367 }
1368
1369 /**
1370 * Overridden in XToolkit and WToolkit
1371 */
1372 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1373 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1374 }
1375
1376 ///////////////////////////////////////////////////////////////////////////
1377 //
1378 // The following is used by the Java Plug-in to coordinate dialog modality
1379 // between containing applications (browsers, ActiveX containers etc) and
1380 // the AWT.
1381 //
1382 ///////////////////////////////////////////////////////////////////////////
1383
1384 private ModalityListenerList modalityListeners = new ModalityListenerList();
1385
1386 public void addModalityListener(ModalityListener listener) {
1387 modalityListeners.add(listener);
1388 }
1389
1390 public void removeModalityListener(ModalityListener listener) {
1391 modalityListeners.remove(listener);
1392 }
1393
1394 public void notifyModalityPushed(Dialog dialog) {
1395 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1396 }
1397
1398 public void notifyModalityPopped(Dialog dialog) {
1399 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1400 }
1401
1402 final void notifyModalityChange(int id, Dialog source) {
1403 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1404 ev.dispatch();
1405 }
1406
1407 static class ModalityListenerList implements ModalityListener {
1408
1409 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1410
1411 void add(ModalityListener listener) {
1412 listeners.addElement(listener);
1413 }
1414
1415 void remove(ModalityListener listener) {
1416 listeners.removeElement(listener);
1417 }
1418
1419 public void modalityPushed(ModalityEvent ev) {
1420 Iterator<ModalityListener> it = listeners.iterator();
1421 while (it.hasNext()) {
1422 it.next().modalityPushed(ev);
1423 }
1424 }
1425
1426 public void modalityPopped(ModalityEvent ev) {
1427 Iterator<ModalityListener> it = listeners.iterator();
1428 while (it.hasNext()) {
1429 it.next().modalityPopped(ev);
1430 }
1431 }
1432 } // end of class ModalityListenerList
1433
1434 ///////////////////////////////////////////////////////////////////////////
1435 // End Plug-in code
1436 ///////////////////////////////////////////////////////////////////////////
1437
1438 public static boolean isLightweightOrUnknown(Component comp) {
1439 if (comp.isLightweight()
1440 || !(getDefaultToolkit() instanceof SunToolkit))
1441 {
1442 return true;
1443 }
1444 return !(comp instanceof Button
1445 || comp instanceof Canvas
1446 || comp instanceof Checkbox
1447 || comp instanceof Choice
1448 || comp instanceof Label
1449 || comp instanceof java.awt.List
1450 || comp instanceof Panel
1451 || comp instanceof Scrollbar
1452 || comp instanceof ScrollPane
1453 || comp instanceof TextArea
1454 || comp instanceof TextField
1455 || comp instanceof Window);
1456 }
1457
1458 public static Method getMethod(final Class clz, final String methodName, final Class[] params) {
1459 Method res = null;
1460 try {
1461 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1462 public Method run() throws Exception {
1463 Method m = clz.getDeclaredMethod(methodName, params);
1464 m.setAccessible(true);
1465 return m;
1466 }
1467 });
1468 } catch (PrivilegedActionException ex) {
1469 ex.printStackTrace();
1470 }
1471 return res;
1472 }
1473
1474 public static class OperationTimedOut extends RuntimeException {
1475 public OperationTimedOut(String msg) {
1476 super(msg);
1477 }
1478 public OperationTimedOut() {
1479 }
1480 }
1481 public static class InfiniteLoop extends RuntimeException {
1482 }
1483
1484 public static class IllegalThreadException extends RuntimeException {
1485 public IllegalThreadException(String msg) {
1486 super(msg);
1487 }
1488 public IllegalThreadException() {
1489 }
1490 }
1491
1492 public static final int DEFAULT_WAIT_TIME = 10000;
1493 private static final int MAX_ITERS = 20;
1494 private static final int MIN_ITERS = 0;
1495 private static final int MINIMAL_EDELAY = 0;
1496
1497 /**
1498 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1499 */
1500 public void realSync() throws OperationTimedOut, InfiniteLoop {
1501 realSync(DEFAULT_WAIT_TIME);
1502 }
1503
1504 /**
1505 * Forces toolkit to synchronize with the native windowing
1506 * sub-system, flushing all pending work and waiting for all the
1507 * events to be processed. This method guarantees that after
1508 * return no additional Java events will be generated, unless
1509 * cause by user. Obviously, the method cannot be used on the
1510 * event dispatch thread (EDT). In case it nevertheless gets
1511 * invoked on this thread, the method throws the
1512 * IllegalThreadException runtime exception.
1513 *
1514 * <p> This method allows to write tests without explicit timeouts
1515 * or wait for some event. Example:
1516 * <code>
1517 * Frame f = ...;
1518 * f.setVisible(true);
1519 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1520 * </code>
1521 *
1522 * <p> After realSync, <code>f</code> will be completely visible
1523 * on the screen, its getLocationOnScreen will be returning the
1524 * right result and it will be the focus owner.
1525 *
1526 * <p> Another example:
1527 * <code>
1528 * b.requestFocus();
1529 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1530 * </code>
1531 *
1532 * <p> After realSync, <code>b</code> will be focus owner.
1533 *
1534 * <p> Notice that realSync isn't guaranteed to work if recurring
1535 * actions occur, such as if during processing of some event
1536 * another request which may generate some events occurs. By
1537 * default, sync tries to perform as much as {@value MAX_ITERS}
1538 * cycles of event processing, allowing for roughly {@value
1539 * MAX_ITERS} additional requests.
1540 *
1541 * <p> For example, requestFocus() generates native request, which
1542 * generates one or two Java focus events, which then generate a
1543 * serie of paint events, a serie of Java focus events, which then
1544 * generate a serie of paint events which then are processed -
1545 * three cycles, minimum.
1546 *
1547 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1548 */
1549 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1550 {
1551 if (EventQueue.isDispatchThread()) {
1552 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1553 }
1554 int bigLoop = 0;
1555 do {
1556 // Let's do sync first
1557 sync();
1558
1559 // During the wait process, when we were processing incoming
1560 // events, we could have made some new request, which can
1561 // generate new events. Example: MapNotify/XSetInputFocus.
1562 // Therefore, we dispatch them as long as there is something
1563 // to dispatch.
1564 int iters = 0;
1565 while (iters < MIN_ITERS) {
1566 syncNativeQueue(timeout);
1567 iters++;
1568 }
1569 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1570 iters++;
1571 }
1572 if (iters >= MAX_ITERS) {
1573 throw new InfiniteLoop();
1574 }
1575
1576 // native requests were dispatched by X/Window Manager or Windows
1577 // Moreover, we processed them all on Toolkit thread
1578 // Now wait while EDT processes them.
1579 //
1580 // During processing of some events (focus, for example),
1581 // some other events could have been generated. So, after
1582 // waitForIdle, we may end up with full EventQueue
1583 iters = 0;
1584 while (iters < MIN_ITERS) {
1585 waitForIdle(timeout);
1586 iters++;
1587 }
1588 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1589 iters++;
1590 }
1591 if (iters >= MAX_ITERS) {
1592 throw new InfiniteLoop();
1593 }
1594
1595 bigLoop++;
1596 // Again, for Java events, it was simple to check for new Java
1597 // events by checking event queue, but what if Java events
1598 // resulted in native requests? Therefor, check native events again.
1599 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1600 }
1601
1602 /**
1603 * Platform toolkits need to implement this method to perform the
1604 * sync of the native queue. The method should wait until native
1605 * requests are processed, all native events are processed and
1606 * corresponding Java events are generated. Should return
1607 * <code>true</code> if some events were processed,
1608 * <code>false</code> otherwise.
1609 */
1610 protected abstract boolean syncNativeQueue(final long timeout);
1611
1612 private boolean eventDispatched = false;
1613 private boolean queueEmpty = false;
1614 private final Object waitLock = "Wait Lock";
1615
1616 static Method eqNoEvents;
1617
1618 private boolean isEQEmpty() {
1619 EventQueue queue = getSystemEventQueueImpl();
1620 synchronized(SunToolkit.class) {
1621 if (eqNoEvents == null) {
1622 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1623 }
1624 }
1625 try {
1626 return (Boolean)eqNoEvents.invoke(queue);
1627 } catch (Exception e) {
1628 e.printStackTrace();
1629 return false;
1630 }
1631 }
1632
1633 /**
1634 * Waits for the Java event queue to empty. Ensures that all
1635 * events are processed (including paint events), and that if
1636 * recursive events were generated, they are also processed.
1637 * Should return <code>true</code> if more processing is
1638 * necessary, <code>false</code> otherwise.
1639 */
1640 protected final boolean waitForIdle(final long timeout) {
1641 flushPendingEvents();
1642 boolean queueWasEmpty = isEQEmpty();
1643 queueEmpty = false;
1644 eventDispatched = false;
1645 synchronized(waitLock) {
1646 postEvent(AppContext.getAppContext(),
1647 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1648 public void dispatch() {
1649 // Here we block EDT. It could have some
1650 // events, it should have dispatched them by
1651 // now. So native requests could have been
1652 // generated. First, dispatch them. Then,
1653 // flush Java events again.
1654 int iters = 0;
1655 while (iters < MIN_ITERS) {
1656 syncNativeQueue(timeout);
1657 iters++;
1658 }
1659 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1660 iters++;
1661 }
1662 flushPendingEvents();
1663
1664 synchronized(waitLock) {
1665 queueEmpty = isEQEmpty();
1666 eventDispatched = true;
1667 waitLock.notifyAll();
1668 }
1669 }
1670 });
1671 try {
1672 while (!eventDispatched) {
1673 waitLock.wait();
1674 }
1675 } catch (InterruptedException ie) {
1676 return false;
1677 }
1678 }
1679
1680 try {
1681 Thread.sleep(MINIMAL_EDELAY);
1682 } catch (InterruptedException ie) {
1683 throw new RuntimeException("Interrupted");
1684 }
1685
1686 flushPendingEvents();
1687
1688 // Lock to force write-cache flush for queueEmpty.
1689 synchronized (waitLock) {
1690 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1691 }
1692 }
1693
1694 /**
1695 * Grabs the mouse input for the given window. The window must be
1696 * visible. The window or its children do not receive any
1697 * additional mouse events besides those targeted to them. All
1698 * other events will be dispatched as before - to the respective
1699 * targets. This Window will receive UngrabEvent when automatic
1700 * ungrab is about to happen. The event can be listened to by
1701 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1702 * UngrabEvent class for the list of conditions when ungrab is
1703 * about to happen.
1704 * @see UngrabEvent
1705 */
1706 public abstract void grab(Window w);
1707
1708 /**
1709 * Forces ungrab. No event will be sent.
1710 */
1711 public abstract void ungrab(Window w);
1712
1713
1714 /**
1715 * Locates the splash screen library in a platform dependent way and closes
1716 * the splash screen. Should be invoked on first top-level frame display.
1717 * @see java.awt.SplashScreen
1718 * @since 1.6
1719 */
1720 public static native void closeSplashScreen();
1721
1722 /* The following methods and variables are to support retrieving
1723 * desktop text anti-aliasing settings
1724 */
1725
1726 /* Need an instance method because setDesktopProperty(..) is protected. */
1727 private void fireDesktopFontPropertyChanges() {
1728 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1729 SunToolkit.getDesktopFontHints());
1730 }
1731
1732 private static boolean checkedSystemAAFontSettings;
1733 private static boolean useSystemAAFontSettings;
1734 private static boolean lastExtraCondition = true;
1735 private static RenderingHints desktopFontHints;
1736
1737 /* Since Swing is the reason for this "extra condition" logic its
1738 * worth documenting it in some detail.
1739 * First, a goal is for Swing and applications to both retrieve and
1740 * use the same desktop property value so that there is complete
1741 * consistency between the settings used by JDK's Swing implementation
1742 * and 3rd party custom Swing components, custom L&Fs and any general
1743 * text rendering that wants to be consistent with these.
1744 * But by default on Solaris & Linux Swing will not use AA text over
1745 * remote X11 display (unless Xrender can be used which is TBD and may not
1746 * always be available anyway) as that is a noticeable performance hit.
1747 * So there needs to be a way to express that extra condition so that
1748 * it is seen by all clients of the desktop property API.
1749 * If this were the only condition it could be handled here as it would
1750 * be the same for any L&F and could reasonably be considered to be
1751 * a static behaviour of those systems.
1752 * But GTK currently has an additional test based on locale which is
1753 * not applied by Metal. So mixing GTK in a few locales with Metal
1754 * would mean the last one wins.
1755 * This could be stored per-app context which would work
1756 * for different applets, but wouldn't help for a single application
1757 * using GTK and some other L&F concurrently.
1758 * But it is expected this will be addressed within GTK and the font
1759 * system so is a temporary and somewhat unlikely harmless corner case.
1760 */
1761 public static void setAAFontSettingsCondition(boolean extraCondition) {
1762 if (extraCondition != lastExtraCondition) {
1763 lastExtraCondition = extraCondition;
1764 if (checkedSystemAAFontSettings) {
1765 /* Someone already asked for this info, under a different
1766 * condition.
1767 * We'll force re-evaluation instead of replicating the
1768 * logic, then notify any listeners of any change.
1769 */
1770 checkedSystemAAFontSettings = false;
1771 Toolkit tk = Toolkit.getDefaultToolkit();
1772 if (tk instanceof SunToolkit) {
1773 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1774 }
1775 }
1776 }
1777 }
1778
1779 /* "false", "off", ""default" aren't explicitly tested, they
1780 * just fall through to produce a null return which all are equated to
1781 * "false".
1782 */
1783 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1784 Object aaHint = null;
1785 hintname = hintname.toLowerCase(Locale.ENGLISH);
1786 if (hintname.equals("on")) {
1787 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1788 } else if (hintname.equals("gasp")) {
1789 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1790 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1791 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1792 } else if (hintname.equals("lcd_hbgr")) {
1793 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1794 } else if (hintname.equals("lcd_vrgb")) {
1795 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1796 } else if (hintname.equals("lcd_vbgr")) {
1797 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1798 }
1799 if (aaHint != null) {
1800 RenderingHints map = new RenderingHints(null);
1801 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1802 return map;
1803 } else {
1804 return null;
1805 }
1806 }
1807
1808 /* This method determines whether to use the system font settings,
1809 * or ignore them if a L&F has specified they should be ignored, or
1810 * to override both of these with a system property specified value.
1811 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1812 * system property isn't applied as desktop properties are considered
1813 * to be inapplicable in that case. In that headless case although
1814 * this method will return "true" the toolkit will return a null map.
1815 */
1816 private static boolean useSystemAAFontSettings() {
1817 if (!checkedSystemAAFontSettings) {
1818 useSystemAAFontSettings = true; /* initially set this true */
1819 String systemAAFonts = null;
1820 Toolkit tk = Toolkit.getDefaultToolkit();
1821 if (tk instanceof SunToolkit) {
1822 systemAAFonts =
1823 (String)AccessController.doPrivileged(
1824 new GetPropertyAction("awt.useSystemAAFontSettings"));
1825 }
1826 if (systemAAFonts != null) {
1827 useSystemAAFontSettings =
1828 Boolean.valueOf(systemAAFonts).booleanValue();
1829 /* If it is anything other than "true", then it may be
1830 * a hint name , or it may be "off, "default", etc.
1831 */
1832 if (!useSystemAAFontSettings) {
1833 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1834 }
1835 }
1836 /* If its still true, apply the extra condition */
1837 if (useSystemAAFontSettings) {
1838 useSystemAAFontSettings = lastExtraCondition;
1839 }
1840 checkedSystemAAFontSettings = true;
1841 }
1842 return useSystemAAFontSettings;
1843 }
1844
1845 /* A variable defined for the convenience of JDK code */
1846 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1847
1848 /* Overridden by subclasses to return platform/desktop specific values */
1849 protected RenderingHints getDesktopAAHints() {
1850 return null;
1851 }
1852
1853 /* Subclass desktop property loading methods call this which
1854 * in turn calls the appropriate subclass implementation of
1855 * getDesktopAAHints() when system settings are being used.
1856 * Its public rather than protected because subclasses may delegate
1857 * to a helper class.
1858 */
1859 public static RenderingHints getDesktopFontHints() {
1860 if (useSystemAAFontSettings()) {
1861 Toolkit tk = Toolkit.getDefaultToolkit();
1862 if (tk instanceof SunToolkit) {
1863 Object map = ((SunToolkit)tk).getDesktopAAHints();
1864 return (RenderingHints)map;
1865 } else { /* Headless Toolkit */
1866 return null;
1867 }
1868 } else if (desktopFontHints != null) {
1869 /* cloning not necessary as the return value is cloned later, but
1870 * its harmless.
1871 */
1872 return (RenderingHints)(desktopFontHints.clone());
1873 } else {
1874 return null;
1875 }
1876 }
1877
1878
1879 public abstract boolean isDesktopSupported();
1880
1881 /*
1882 * consumeNextKeyTyped() method is not currently used,
1883 * however Swing could use it in the future.
1884 */
1885 private static Method consumeNextKeyTypedMethod = null;
1886 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1887 if (consumeNextKeyTypedMethod == null) {
1888 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1889 "consumeNextKeyTyped",
1890 new Class[] {KeyEvent.class});
1891 }
1892 try {
1893 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1894 keyEvent);
1895 } catch (IllegalAccessException iae) {
1896 iae.printStackTrace();
1897 } catch (InvocationTargetException ite) {
1898 ite.printStackTrace();
1899 }
1900 }
1901
1902 protected static void dumpPeers(final PlatformLogger aLog) {
1903 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1904 }
1905
1906 /**
1907 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1908 * @return Window ancestor of the component or component by itself if it is Window;
1909 * null, if component is not a part of window hierarchy
1910 */
1911 public static Window getContainingWindow(Component comp) {
1912 while (comp != null && !(comp instanceof Window)) {
1913 comp = comp.getParent();
1914 }
1915 return (Window)comp;
1916 }
1917
1918 /**
1919 * Returns the value of the system property indicated by the specified key.
1920 */
1921 public static String getSystemProperty(final String key) {
1922 return (String)AccessController.doPrivileged(new PrivilegedAction() {
1923 public Object run() {
1924 return System.getProperty(key);
1925 }
1926 });
1927 }
1928
1929 /**
1930 * Returns the boolean value of the system property indicated by the specified key.
1931 */
1932 protected static Boolean getBooleanSystemProperty(String key) {
1933 return Boolean.valueOf(AccessController.
1934 doPrivileged(new GetBooleanAction(key)));
1935 }
1936
1937 private static Boolean sunAwtDisableMixing = null;
1938
1939 /**
1940 * Returns the value of "sun.awt.disableMixing" property. Default
1941 * value is {@code false}.
1942 */
1943 public synchronized static boolean getSunAwtDisableMixing() {
1944 if (sunAwtDisableMixing == null) {
1945 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1946 }
1947 return sunAwtDisableMixing.booleanValue();
1948 }
1949
1950 /**
1951 * Returns true if the native GTK libraries are available. The
1952 * default implementation returns false, but UNIXToolkit overrides this
1953 * method to provide a more specific answer.
1954 */
1955 public boolean isNativeGTKAvailable() {
1956 return false;
1957 }
1958
1959 // Cosntant alpha
1960 public boolean isWindowOpacitySupported() {
1961 return false;
1962 }
1963
1964 // Shaping
1965 public boolean isWindowShapingSupported() {
1966 return false;
1967 }
1968
1969 // Per-pixel alpha
1970 public boolean isWindowTranslucencySupported() {
1971 return false;
1972 }
1973
1974 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1975 return false;
1976 }
1977
1978 /**
1979 * Returns true if swing backbuffer should be translucent.
1980 */
1981 public boolean isSwingBackbufferTranslucencySupported() {
1982 return false;
1983 }
1984
1985 /**
1986 * Returns whether or not a containing top level window for the passed
1987 * component is
1988 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1989 *
1990 * @param c a Component which toplevel's to check
1991 * @return {@code true} if the passed component is not null and has a
1992 * containing toplevel window which is opaque (so per-pixel translucency
1993 * is not enabled), {@code false} otherwise
1994 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1995 */
1996 public static boolean isContainingTopLevelOpaque(Component c) {
1997 Window w = getContainingWindow(c);
1998 return w != null && w.isOpaque();
1999 }
2000
2001 /**
2002 * Returns whether or not a containing top level window for the passed
2003 * component is
2004 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2005 *
2006 * @param c a Component which toplevel's to check
2007 * @return {@code true} if the passed component is not null and has a
2008 * containing toplevel window which has opacity less than
2009 * 1.0f (which means that it is translucent), {@code false} otherwise
2010 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2011 */
2012 public static boolean isContainingTopLevelTranslucent(Component c) {
2013 Window w = getContainingWindow(c);
2014 return w != null && ((Window)w).getOpacity() < 1.0f;
2015 }
2016
2017 /**
2018 * Returns whether the native system requires using the peer.updateWindow()
2019 * method to update the contents of a non-opaque window, or if usual
2020 * painting procedures are sufficient. The default return value covers
2021 * the X11 systems. On MS Windows this method is overriden in WToolkit
2022 * to return true.
2023 */
2024 public boolean needUpdateWindow() {
2025 return false;
2026 }
2027
2028 /**
2029 * Descendants of the SunToolkit should override and put their own logic here.
2030 */
2031 public int getNumberOfButtons(){
2032 return 3;
2033 }
2034
2035 /**
2036 * Checks that the given object implements/extends the given
2037 * interface/class.
2038 *
2039 * Note that using the instanceof operator causes a class to be loaded.
2040 * Using this method doesn't load a class and it can be used instead of
2041 * the instanceof operator for performance reasons.
2042 *
2043 * @param obj Object to be checked
2044 * @param type The name of the interface/class. Must be
2045 * fully-qualified interface/class name.
2046 * @return true, if this object implements/extends the given
2047 * interface/class, false, otherwise, or if obj or type is null
2048 */
2049 public static boolean isInstanceOf(Object obj, String type) {
2050 if (obj == null) return false;
2051 if (type == null) return false;
2052
2053 return isInstanceOf(obj.getClass(), type);
2054 }
2055
2056 private static boolean isInstanceOf(Class cls, String type) {
2057 if (cls == null) return false;
2058
2059 if (cls.getName().equals(type)) {
2060 return true;
2061 }
2062
2063 for (Class c : cls.getInterfaces()) {
2064 if (c.getName().equals(type)) {
2065 return true;
2066 }
2067 }
2068 return isInstanceOf(cls.getSuperclass(), type);
2069 }
2070
2071 ///////////////////////////////////////////////////////////////////////////
2072 //
2073 // The following methods help set and identify whether a particular
2074 // AWTEvent object was produced by the system or by user code. As of this
2075 // writing the only consumer is the Java Plug-In, although this information
2076 // could be useful to more clients and probably should be formalized in
2077 // the public API.
2078 //
2079 ///////////////////////////////////////////////////////////////////////////
2080
2081 public static void setSystemGenerated(AWTEvent e) {
2082 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2083 }
2084
2085 public static boolean isSystemGenerated(AWTEvent e) {
2086 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2087 }
2088
2089 } // class SunToolkit
2090
2091
2092 /*
2093 * PostEventQueue is a Thread that runs in the same AppContext as the
2094 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2095 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2096 * events to this queue, which then calls EventQueue.postEvent().
2097 *
2098 * We do this because EventQueue.postEvent() may be overridden by client
2099 * code, and we mustn't ever call client code from the toolkit thread.
2100 */
2101 class PostEventQueue {
2102 private EventQueueItem queueHead = null;
2103 private EventQueueItem queueTail = null;
2104 private final EventQueue eventQueue;
2105
2106 // For the case when queue is cleared but events are not posted
2107 private volatile boolean isFlushing = false;
2108
2109 PostEventQueue(EventQueue eq) {
2110 eventQueue = eq;
2111 }
2112
2113 public synchronized boolean noEvents() {
2114 return queueHead == null && !isFlushing;
2115 }
2116
2117 /*
2118 * Continually post pending AWTEvents to the Java EventQueue. The method
2119 * is synchronized to ensure the flush is completed before a new event
2120 * can be posted to this queue.
2121 *
2122 * 7177040: The method couldn't be wholly synchronized because of calls
2123 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2124 * potentially lead to deadlock
2125 */
2126 public void flush() {
2127 EventQueueItem tempQueue;
2128 synchronized (this) {
2129 tempQueue = queueHead;
2130 queueHead = queueTail = null;
2131 isFlushing = (tempQueue != null);
2132 }
2133 try {
2134 while (tempQueue != null) {
2135 eventQueue.postEvent(tempQueue.event);
2136 tempQueue = tempQueue.next;
2137 }
2138 }
2139 finally {
2140 isFlushing = false;
2141 }
2142 }
2143
2144 /*
2145 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2146 */
2147 void postEvent(AWTEvent event) {
2148 EventQueueItem item = new EventQueueItem(event);
2149
2150 synchronized (this) {
2151 if (queueHead == null) {
2152 queueHead = queueTail = item;
2153 } else {
2154 queueTail.next = item;
2155 queueTail = item;
2156 }
2157 }
2158 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2159 }
2160 } // class PostEventQueue