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 @SuppressWarnings("deprecation")
202 public abstract FontPeer getFontPeer(String name, int style);
203
204 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
205 throws AWTException;
206
207 public abstract KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager)
208 throws HeadlessException;
209
210 /**
211 * The AWT lock is typically only used on Unix platforms to synchronize
212 * access to Xlib, OpenGL, etc. However, these methods are implemented
213 * in SunToolkit so that they can be called from shared code (e.g.
214 * from the OGL pipeline) or from the X11 pipeline regardless of whether
215 * XToolkit or MToolkit is currently in use. There are native macros
216 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
217 * methods is changed, make sure it is compatible with the native macros.
218 *
219 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
220 * used in place of:
221 * synchronized (getAWTLock()) {
222 * ...
223 * }
224 *
225 * By factoring these methods out specially, we are able to change the
226 * implementation of these methods (e.g. use more advanced locking
227 * mechanisms) without impacting calling code.
228 *
229 * Sample usage:
230 * private void doStuffWithXlib() {
231 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
232 * SunToolkit.awtLock();
233 * try {
234 * ...
235 * XlibWrapper.XDoStuff();
236 * } finally {
237 * SunToolkit.awtUnlock();
238 * }
239 * }
240 */
241
242 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
243 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
244
245 public static final void awtLock() {
246 AWT_LOCK.lock();
247 }
248
249 public static final boolean awtTryLock() {
250 return AWT_LOCK.tryLock();
251 }
252
253 public static final void awtUnlock() {
254 AWT_LOCK.unlock();
255 }
256
257 public static final void awtLockWait()
258 throws InterruptedException
259 {
260 AWT_LOCK_COND.await();
261 }
262
263 public static final void awtLockWait(long timeout)
264 throws InterruptedException
265 {
266 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
267 }
268
269 public static final void awtLockNotify() {
270 AWT_LOCK_COND.signal();
271 }
272
273 public static final void awtLockNotifyAll() {
274 AWT_LOCK_COND.signalAll();
275 }
276
277 public static final boolean isAWTLockHeldByCurrentThread() {
278 return AWT_LOCK.isHeldByCurrentThread();
279 }
280
281 /*
282 * Create a new AppContext, along with its EventQueue, for a
283 * new ThreadGroup. Browser code, for example, would use this
284 * method to create an AppContext & EventQueue for an Applet.
285 */
286 public static AppContext createNewAppContext() {
287 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
288 // Create appContext before initialization of EventQueue, so all
289 // the calls to AppContext.getAppContext() from EventQueue ctor
290 // return correct values
291 AppContext appContext = new AppContext(threadGroup);
292
293 initEQ(appContext);
294
295 return appContext;
296 }
297
298 public static Field getField(final Class<?> klass, final String fieldName) {
299 return AccessController.doPrivileged(new PrivilegedAction<Field>() {
300 public Field run() {
301 try {
302 Field field = klass.getDeclaredField(fieldName);
303 assert (field != null);
304 field.setAccessible(true);
305 return field;
306 } catch (SecurityException e) {
307 assert false;
308 } catch (NoSuchFieldException e) {
309 assert false;
310 }
311 return null;
312 }//run
313 });
314 }
315
316 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
317 if (wakeupMethod == null){
318 wakeupMethod = AccessController.doPrivileged(new PrivilegedAction<Method>() {
319 public Method run() {
320 try {
321 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} );
322 if (method != null) {
323 method.setAccessible(true);
324 }
325 return method;
326 } catch (NoSuchMethodException e) {
327 assert false;
328 } catch (SecurityException e) {
329 assert false;
330 }
331 return null;
332 }//run
333 });
334 }
335 try{
336 if (wakeupMethod != null){
337 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)});
338 }
339 } catch (InvocationTargetException e){
340 assert false;
341 } catch (IllegalAccessException e) {
342 assert false;
343 }
344 }
345
346 /*
347 * Fetch the peer associated with the given target (as specified
348 * in the peer creation method). This can be used to determine
349 * things like what the parent peer is. If the target is null
350 * or the target can't be found (either because the a peer was
351 * never created for it or the peer was disposed), a null will
352 * be returned.
353 */
354 protected static Object targetToPeer(Object target) {
355 if (target != null && !GraphicsEnvironment.isHeadless()) {
356 return AWTAutoShutdown.getInstance().getPeer(target);
357 }
358 return null;
359 }
360
361 protected static void targetCreatedPeer(Object target, Object peer) {
362 if (target != null && peer != null &&
363 !GraphicsEnvironment.isHeadless())
364 {
365 AWTAutoShutdown.getInstance().registerPeer(target, peer);
366 }
367 }
368
369 protected static void targetDisposedPeer(Object target, Object peer) {
370 if (target != null && peer != null &&
371 !GraphicsEnvironment.isHeadless())
372 {
373 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
374 }
375 }
376
377 // Maps from non-Component/MenuComponent to AppContext.
378 // WeakHashMap<Component,AppContext>
379 private static final Map<Object, AppContext> appContextMap =
380 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
381
382 /**
383 * Sets the appContext field of target. If target is not a Component or
384 * MenuComponent, this returns false.
385 */
386 private static boolean setAppContext(Object target,
387 AppContext context) {
388 if (target instanceof Component) {
389 AWTAccessor.getComponentAccessor().
390 setAppContext((Component)target, context);
391 } else if (target instanceof MenuComponent) {
392 AWTAccessor.getMenuComponentAccessor().
393 setAppContext((MenuComponent)target, context);
394 } else {
395 return false;
396 }
397 return true;
398 }
399
400 /**
401 * Returns the appContext field for target. If target is not a
402 * Component or MenuComponent this returns null.
403 */
404 private static AppContext getAppContext(Object target) {
405 if (target instanceof Component) {
406 return AWTAccessor.getComponentAccessor().
407 getAppContext((Component)target);
408 } else if (target instanceof MenuComponent) {
409 return AWTAccessor.getMenuComponentAccessor().
410 getAppContext((MenuComponent)target);
411 } else {
412 return null;
413 }
414 }
415
416 /*
417 * Fetch the AppContext associated with the given target.
418 * This can be used to determine things like which EventQueue
419 * to use for posting events to a Component. If the target is
420 * null or the target can't be found, a null with be returned.
421 */
422 public static AppContext targetToAppContext(Object target) {
423 if (target == null || GraphicsEnvironment.isHeadless()) {
424 return null;
425 }
426 AppContext context = getAppContext(target);
427 if (context == null) {
428 // target is not a Component/MenuComponent, try the
429 // appContextMap.
430 context = appContextMap.get(target);
431 }
432 return context;
433 }
434
435 /**
436 * Sets the synchronous status of focus requests on lightweight
437 * components in the specified window to the specified value.
438 * If the boolean parameter is <code>true</code> then the focus
439 * requests on lightweight components will be performed
440 * synchronously, if it is <code>false</code>, then asynchronously.
441 * By default, all windows have their lightweight request status
442 * set to asynchronous.
443 * <p>
444 * The application can only set the status of lightweight focus
445 * requests to synchronous for any of its windows if it doesn't
446 * perform focus transfers between different heavyweight containers.
447 * In this case the observable focus behaviour is the same as with
448 * asynchronous status.
449 * <p>
450 * If the application performs focus transfer between different
451 * heavyweight containers and sets the lightweight focus request
452 * status to synchronous for any of its windows, then further focus
453 * behaviour is unspecified.
454 * <p>
455 * @param w window for which the lightweight focus request status
456 * should be set
457 * @param status the value of lightweight focus request status
458 */
459
460 public static void setLWRequestStatus(Window changed,boolean status){
461 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
462 };
463
464 public static void checkAndSetPolicy(Container cont, boolean isSwingCont)
465 {
466 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager
467 .getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy();
468
469 String toolkitName = Toolkit.getDefaultToolkit().getClass().getName();
470 // if this is not XAWT then use default policy
471 // because Swing change it
472 if (!"sun.awt.X11.XToolkit".equals(toolkitName)) {
473 cont.setFocusTraversalPolicy(defaultPolicy);
474 return;
475 }
476
477 String policyName = defaultPolicy.getClass().getName();
478
479 if (DefaultFocusTraversalPolicy.class != defaultPolicy.getClass()) {
480 // Policy was changed
481 // Check if it is awt policy or swing policy
482 // If it is Swing policy we shouldn't use it in AWT frames
483 // If it is AWT policy we shouldn't use it in Swing frames
484 // Otherwise we should use this policy
485 if (policyName.startsWith("java.awt.")) {
486 // AWT
487 if (isSwingCont) {
488 // Can't use AWT policy in Swing windows - should use Swing's one.
489 defaultPolicy = createLayoutPolicy();
490 } else {
491 // New awt policy.
492 }
493 } else if (policyName.startsWith("javax.swing.")) {
494 if (isSwingCont) {
495 // New Swing's policy
496 } else {
497 defaultPolicy = new DefaultFocusTraversalPolicy();
498 }
499 }
500 } else {
501 // Policy is default, use different default policy for swing
502 if (isSwingCont) {
503 defaultPolicy = createLayoutPolicy();
504 }
505 }
506 cont.setFocusTraversalPolicy(defaultPolicy);
507 }
508
509 private static FocusTraversalPolicy createLayoutPolicy() {
510 FocusTraversalPolicy policy = null;
511 try {
512 Class<?> layoutPolicyClass =
513 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
514 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
515 }
516 catch (ClassNotFoundException e) {
517 assert false;
518 }
519 catch (InstantiationException e) {
520 assert false;
521 }
522 catch (IllegalAccessException e) {
523 assert false;
524 }
525
526 return policy;
527 }
528
529 /*
530 * Insert a mapping from target to AppContext, for later retrieval
531 * via targetToAppContext() above.
532 */
533 public static void insertTargetMapping(Object target, AppContext appContext) {
534 if (!GraphicsEnvironment.isHeadless()) {
535 if (!setAppContext(target, appContext)) {
536 // Target is not a Component/MenuComponent, use the private Map
537 // instead.
538 appContextMap.put(target, appContext);
539 }
540 }
541 }
542
543 /*
544 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
545 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
546 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
547 * not be called under another lock since it locks the EventQueue.
548 * See bugids 4632918, 4526597.
549 */
550 public static void postEvent(AppContext appContext, AWTEvent event) {
551 if (event == null) {
552 throw new NullPointerException();
553 }
554 // All events posted via this method are system-generated.
555 // Placing the following call here reduces considerably the
556 // number of places throughout the toolkit that would
557 // otherwise have to be modified to precisely identify
558 // system-generated events.
559 setSystemGenerated(event);
560 AppContext eventContext = targetToAppContext(event.getSource());
561 if (eventContext != null && !eventContext.equals(appContext)) {
562 log.fine("Event posted on wrong app context : " + event);
563 }
564 PostEventQueue postEventQueue =
565 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
566 if (postEventQueue != null) {
567 postEventQueue.postEvent(event);
568 }
569 }
570
571 /*
572 * Post AWTEvent of high priority.
573 */
574 public static void postPriorityEvent(final AWTEvent e) {
575 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
576 public void run() {
577 AWTAccessor.getAWTEventAccessor().setPosted(e);
578 ((Component)e.getSource()).dispatchEvent(e);
579 }
580 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
581 postEvent(targetToAppContext(e.getSource()), pe);
582 }
583
584 protected static final Lock flushLock = new ReentrantLock();
585 private static boolean isFlushingPendingEvents = false;
586
587 /*
588 * Flush any pending events which haven't been posted to the AWT
589 * EventQueue yet.
590 */
591 public static void flushPendingEvents() {
592 flushLock.lock();
593 try {
594 // Don't call flushPendingEvents() recursively
595 if (!isFlushingPendingEvents) {
596 isFlushingPendingEvents = true;
597 AppContext appContext = AppContext.getAppContext();
598 PostEventQueue postEventQueue =
599 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
600 if (postEventQueue != null) {
601 postEventQueue.flush();
602 }
603 }
604 } finally {
605 isFlushingPendingEvents = false;
606 flushLock.unlock();
607 }
608 }
609
610 public static boolean isPostEventQueueEmpty() {
611 AppContext appContext = AppContext.getAppContext();
612 PostEventQueue postEventQueue =
613 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
614 if (postEventQueue != null) {
615 return postEventQueue.noEvents();
616 } else {
617 return true;
618 }
619 }
620
621 /*
622 * Execute a chunk of code on the Java event handler thread for the
623 * given target. Does not wait for the execution to occur before
624 * returning to the caller.
625 */
626 public static void executeOnEventHandlerThread(Object target,
627 Runnable runnable) {
628 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
629 }
630
631 /*
632 * Fixed 5064013: the InvocationEvent time should be equals
633 * the time of the ActionEvent
634 */
635 @SuppressWarnings("serial")
636 public static void executeOnEventHandlerThread(Object target,
637 Runnable runnable,
638 final long when) {
639 executeOnEventHandlerThread(
640 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
641 public long getWhen() {
642 return when;
643 }
644 });
645 }
646
647 /*
648 * Execute a chunk of code on the Java event handler thread for the
649 * given target. Does not wait for the execution to occur before
650 * returning to the caller.
651 */
652 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
653 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
654 }
655
656 /*
657 * Execute a chunk of code on the Java event handler thread. The
658 * method takes into account provided AppContext and sets
659 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
660 * event. See 6451487 for detailes.
661 * Does not wait for the execution to occur before returning to
662 * the caller.
663 */
664 public static void invokeLaterOnAppContext(
665 AppContext appContext, Runnable dispatcher)
666 {
667 postEvent(appContext,
668 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
669 PeerEvent.PRIORITY_EVENT));
670 }
671
672 /*
673 * Execute a chunk of code on the Java event handler thread for the
674 * given target. Waits for the execution to occur before returning
675 * to the caller.
676 */
677 public static void executeOnEDTAndWait(Object target, Runnable runnable)
678 throws InterruptedException, InvocationTargetException
679 {
680 if (EventQueue.isDispatchThread()) {
681 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
682 }
683
684 class AWTInvocationLock {}
685 Object lock = new AWTInvocationLock();
686
687 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
688
689 synchronized (lock) {
690 executeOnEventHandlerThread(event);
691 while(!event.isDispatched()) {
692 lock.wait();
693 }
694 }
695
696 Throwable eventThrowable = event.getThrowable();
697 if (eventThrowable != null) {
698 throw new InvocationTargetException(eventThrowable);
699 }
700 }
701
702 /*
703 * Returns true if the calling thread is the event dispatch thread
704 * contained within AppContext which associated with the given target.
705 * Use this call to ensure that a given task is being executed
706 * (or not being) on the event dispatch thread for the given target.
707 */
708 public static boolean isDispatchThreadForAppContext(Object target) {
709 AppContext appContext = targetToAppContext(target);
710 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
711
712 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
713 return accessor.isDispatchThreadImpl(eq);
714 }
715
716 public Dimension getScreenSize() {
717 return new Dimension(getScreenWidth(), getScreenHeight());
718 }
719 protected abstract int getScreenWidth();
720 protected abstract int getScreenHeight();
721
722 @SuppressWarnings("deprecation")
723 public FontMetrics getFontMetrics(Font font) {
724 return FontDesignMetrics.getMetrics(font);
725 }
726
727 @SuppressWarnings("deprecation")
728 public String[] getFontList() {
729 String[] hardwiredFontList = {
730 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
731 Font.DIALOG_INPUT
732
733 // -- Obsolete font names from 1.0.2. It was decided that
734 // -- getFontList should not return these old names:
735 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
736 };
737 return hardwiredFontList;
738 }
739
740 public PanelPeer createPanel(Panel target) {
741 return (PanelPeer)createComponent(target);
742 }
743
744 public CanvasPeer createCanvas(Canvas target) {
745 return (CanvasPeer)createComponent(target);
746 }
747
748 /**
749 * Disables erasing of background on the canvas before painting if
750 * this is supported by the current toolkit. It is recommended to
751 * call this method early, before the Canvas becomes displayable,
752 * because some Toolkit implementations do not support changing
753 * this property once the Canvas becomes displayable.
754 */
755 public void disableBackgroundErase(Canvas canvas) {
756 disableBackgroundEraseImpl(canvas);
757 }
758
759 /**
760 * Disables the native erasing of the background on the given
761 * component before painting if this is supported by the current
762 * toolkit. This only has an effect for certain components such as
763 * Canvas, Panel and Window. It is recommended to call this method
764 * early, before the Component becomes displayable, because some
765 * Toolkit implementations do not support changing this property
766 * once the Component becomes displayable.
767 */
768 public void disableBackgroundErase(Component component) {
769 disableBackgroundEraseImpl(component);
770 }
771
772 private void disableBackgroundEraseImpl(Component component) {
773 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
774 }
775
776 /**
777 * Returns the value of "sun.awt.noerasebackground" property. Default
778 * value is {@code false}.
779 */
780 public static boolean getSunAwtNoerasebackground() {
781 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
782 }
783
784 /**
785 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
786 * value is {@code false}.
787 */
788 public static boolean getSunAwtErasebackgroundonresize() {
789 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
790 }
791
792
793 static final SoftCache imgCache = new SoftCache();
794
795 static Image getImageFromHash(Toolkit tk, URL url) {
796 SecurityManager sm = System.getSecurityManager();
797 if (sm != null) {
798 try {
799 java.security.Permission perm =
800 url.openConnection().getPermission();
801 if (perm != null) {
802 try {
803 sm.checkPermission(perm);
804 } catch (SecurityException se) {
805 // fallback to checkRead/checkConnect for pre 1.2
806 // security managers
807 if ((perm instanceof java.io.FilePermission) &&
808 perm.getActions().indexOf("read") != -1) {
809 sm.checkRead(perm.getName());
810 } else if ((perm instanceof
811 java.net.SocketPermission) &&
812 perm.getActions().indexOf("connect") != -1) {
813 sm.checkConnect(url.getHost(), url.getPort());
814 } else {
815 throw se;
816 }
817 }
818 }
819 } catch (java.io.IOException ioe) {
820 sm.checkConnect(url.getHost(), url.getPort());
821 }
822 }
823 synchronized (imgCache) {
824 Image img = (Image)imgCache.get(url);
825 if (img == null) {
826 try {
827 img = tk.createImage(new URLImageSource(url));
828 imgCache.put(url, img);
829 } catch (Exception e) {
830 }
831 }
832 return img;
833 }
834 }
835
836 static Image getImageFromHash(Toolkit tk,
837 String filename) {
838 SecurityManager security = System.getSecurityManager();
839 if (security != null) {
840 security.checkRead(filename);
841 }
842 synchronized (imgCache) {
843 Image img = (Image)imgCache.get(filename);
844 if (img == null) {
845 try {
846 img = tk.createImage(new FileImageSource(filename));
847 imgCache.put(filename, img);
848 } catch (Exception e) {
849 }
850 }
851 return img;
852 }
853 }
854
855 public Image getImage(String filename) {
856 return getImageFromHash(this, filename);
857 }
858
859 public Image getImage(URL url) {
860 return getImageFromHash(this, url);
861 }
862
863 public Image createImage(String filename) {
864 SecurityManager security = System.getSecurityManager();
865 if (security != null) {
866 security.checkRead(filename);
867 }
868 return createImage(new FileImageSource(filename));
869 }
870
871 public Image createImage(URL url) {
872 SecurityManager sm = System.getSecurityManager();
873 if (sm != null) {
874 try {
875 java.security.Permission perm =
876 url.openConnection().getPermission();
877 if (perm != null) {
878 try {
879 sm.checkPermission(perm);
880 } catch (SecurityException se) {
881 // fallback to checkRead/checkConnect for pre 1.2
882 // security managers
883 if ((perm instanceof java.io.FilePermission) &&
884 perm.getActions().indexOf("read") != -1) {
885 sm.checkRead(perm.getName());
886 } else if ((perm instanceof
887 java.net.SocketPermission) &&
888 perm.getActions().indexOf("connect") != -1) {
889 sm.checkConnect(url.getHost(), url.getPort());
890 } else {
891 throw se;
892 }
893 }
894 }
895 } catch (java.io.IOException ioe) {
896 sm.checkConnect(url.getHost(), url.getPort());
897 }
898 }
899 return createImage(new URLImageSource(url));
900 }
901
902 public Image createImage(byte[] data, int offset, int length) {
903 return createImage(new ByteArrayImageSource(data, offset, length));
904 }
905
906 public Image createImage(ImageProducer producer) {
907 return new ToolkitImage(producer);
908 }
909
910 public int checkImage(Image img, int w, int h, ImageObserver o) {
911 if (!(img instanceof ToolkitImage)) {
912 return ImageObserver.ALLBITS;
913 }
914
915 ToolkitImage tkimg = (ToolkitImage)img;
916 int repbits;
917 if (w == 0 || h == 0) {
918 repbits = ImageObserver.ALLBITS;
919 } else {
920 repbits = tkimg.getImageRep().check(o);
921 }
922 return tkimg.check(o) | repbits;
923 }
924
925 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
926 if (w == 0 || h == 0) {
927 return true;
928 }
929
930 // Must be a ToolkitImage
931 if (!(img instanceof ToolkitImage)) {
932 return true;
933 }
934
935 ToolkitImage tkimg = (ToolkitImage)img;
936 if (tkimg.hasError()) {
937 if (o != null) {
938 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
939 -1, -1, -1, -1);
940 }
941 return false;
942 }
943 ImageRepresentation ir = tkimg.getImageRep();
944 return ir.prepare(o);
945 }
946
947 /**
948 * Scans {@code imageList} for best-looking image of specified dimensions.
949 * Image can be scaled and/or padded with transparency.
950 */
951 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
952 if (width == 0 || height == 0) {
953 return null;
954 }
955 Image bestImage = null;
956 int bestWidth = 0;
957 int bestHeight = 0;
958 double bestSimilarity = 3; //Impossibly high value
959 double bestScaleFactor = 0;
960 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
961 //Iterate imageList looking for best matching image.
962 //'Similarity' measure is defined as good scale factor and small insets.
963 //best possible similarity is 0 (no scale, no insets).
964 //It's found while the experiments that good-looking result is achieved
965 //with scale factors x1, x3/4, x2/3, xN, x1/N.
966 Image im = i.next();
967 if (im == null) {
968 if (log.isLoggable(PlatformLogger.FINER)) {
969 log.finer("SunToolkit.getScaledIconImage: " +
970 "Skipping the image passed into Java because it's null.");
971 }
972 continue;
973 }
974 if (im instanceof ToolkitImage) {
975 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
976 ir.reconstruct(ImageObserver.ALLBITS);
977 }
978 int iw;
979 int ih;
980 try {
981 iw = im.getWidth(null);
982 ih = im.getHeight(null);
983 } catch (Exception e){
984 if (log.isLoggable(PlatformLogger.FINER)) {
985 log.finer("SunToolkit.getScaledIconImage: " +
986 "Perhaps the image passed into Java is broken. Skipping this icon.");
987 }
988 continue;
989 }
990 if (iw > 0 && ih > 0) {
991 //Calc scale factor
992 double scaleFactor = Math.min((double)width / (double)iw,
993 (double)height / (double)ih);
994 //Calculate scaled image dimensions
995 //adjusting scale factor to nearest "good" value
996 int adjw = 0;
997 int adjh = 0;
998 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
999 if (scaleFactor >= 2) {
1000 //Need to enlarge image more than twice
1001 //Round down scale factor to multiply by integer value
1002 scaleFactor = Math.floor(scaleFactor);
1003 adjw = iw * (int)scaleFactor;
1004 adjh = ih * (int)scaleFactor;
1005 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1006 } else if (scaleFactor >= 1) {
1007 //Don't scale
1008 scaleFactor = 1.0;
1009 adjw = iw;
1010 adjh = ih;
1011 scaleMeasure = 0;
1012 } else if (scaleFactor >= 0.75) {
1013 //Multiply by 3/4
1014 scaleFactor = 0.75;
1015 adjw = iw * 3 / 4;
1016 adjh = ih * 3 / 4;
1017 scaleMeasure = 0.3;
1018 } else if (scaleFactor >= 0.6666) {
1019 //Multiply by 2/3
1020 scaleFactor = 0.6666;
1021 adjw = iw * 2 / 3;
1022 adjh = ih * 2 / 3;
1023 scaleMeasure = 0.33;
1024 } else {
1025 //Multiply size by 1/scaleDivider
1026 //where scaleDivider is minimum possible integer
1027 //larger than 1/scaleFactor
1028 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1029 scaleFactor = 1.0 / scaleDivider;
1030 adjw = (int)Math.round((double)iw / scaleDivider);
1031 adjh = (int)Math.round((double)ih / scaleDivider);
1032 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1033 }
1034 double similarity = ((double)width - (double)adjw) / (double)width +
1035 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1036 scaleMeasure; //Large rescale is bad
1037 if (similarity < bestSimilarity) {
1038 bestSimilarity = similarity;
1039 bestScaleFactor = scaleFactor;
1040 bestImage = im;
1041 bestWidth = adjw;
1042 bestHeight = adjh;
1043 }
1044 if (similarity == 0) break;
1045 }
1046 }
1047 if (bestImage == null) {
1048 //No images were found, possibly all are broken
1049 return null;
1050 }
1051 BufferedImage bimage =
1052 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1053 Graphics2D g = bimage.createGraphics();
1054 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1055 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1056 try {
1057 int x = (width - bestWidth) / 2;
1058 int y = (height - bestHeight) / 2;
1059 if (log.isLoggable(PlatformLogger.FINER)) {
1060 log.finer("WWindowPeer.getScaledIconData() result : " +
1061 "w : " + width + " h : " + height +
1062 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1063 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1064 " adjW : " + bestWidth + " adjH : " + bestHeight +
1065 " x : " + x + " y : " + y);
1066 }
1067 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1068 } finally {
1069 g.dispose();
1070 }
1071 return bimage;
1072 }
1073
1074 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1075 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1076 if (bimage == null) {
1077 if (log.isLoggable(PlatformLogger.FINER)) {
1078 log.finer("SunToolkit.getScaledIconData: " +
1079 "Perhaps the image passed into Java is broken. Skipping this icon.");
1080 }
1081 return null;
1082 }
1083 Raster raster = bimage.getRaster();
1084 DataBuffer buffer = raster.getDataBuffer();
1085 return (DataBufferInt)buffer;
1086 }
1087
1088 protected EventQueue getSystemEventQueueImpl() {
1089 return getSystemEventQueueImplPP();
1090 }
1091
1092 // Package private implementation
1093 static EventQueue getSystemEventQueueImplPP() {
1094 return getSystemEventQueueImplPP(AppContext.getAppContext());
1095 }
1096
1097 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1098 EventQueue theEventQueue =
1099 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1100 return theEventQueue;
1101 }
1102
1103 /**
1104 * Give native peers the ability to query the native container
1105 * given a native component (eg the direct parent may be lightweight).
1106 */
1107 public static Container getNativeContainer(Component c) {
1108 return Toolkit.getNativeContainer(c);
1109 }
1110
1111 /**
1112 * Gives native peers the ability to query the closest HW component.
1113 * If the given component is heavyweight, then it returns this. Otherwise,
1114 * it goes one level up in the hierarchy and tests next component.
1115 */
1116 public static Component getHeavyweightComponent(Component c) {
1117 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1118 c = AWTAccessor.getComponentAccessor().getParent(c);
1119 }
1120 return c;
1121 }
1122
1123 /**
1124 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1125 */
1126 public int getFocusAcceleratorKeyMask() {
1127 return InputEvent.ALT_MASK;
1128 }
1129
1130 /**
1131 * Tests whether specified key modifiers mask can be used to enter a printable
1132 * character. This is a default implementation of this method, which reflects
1133 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1134 * characters from the extended character set (like euro sign or math symbols)
1135 */
1136 public boolean isPrintableCharacterModifiersMask(int mods) {
1137 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1138 }
1139
1140 /**
1141 * Returns whether popup is allowed to be shown above the task bar.
1142 * This is a default implementation of this method, which checks
1143 * corresponding security permission.
1144 */
1145 public boolean canPopupOverlapTaskBar() {
1146 boolean result = true;
1147 try {
1148 SecurityManager sm = System.getSecurityManager();
1149 if (sm != null) {
1150 sm.checkPermission(
1151 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1152 }
1153 } catch (SecurityException se) {
1154 // There is no permission to show popups over the task bar
1155 result = false;
1156 }
1157 return result;
1158 }
1159
1160 /**
1161 * Returns a new input method window, with behavior as specified in
1162 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1163 * If the inputContext is not null, the window should return it from its
1164 * getInputContext() method. The window needs to implement
1165 * sun.awt.im.InputMethodWindow.
1166 * <p>
1167 * SunToolkit subclasses can override this method to return better input
1168 * method windows.
1169 */
1170 public Window createInputMethodWindow(String title, InputContext context) {
1171 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1172 }
1173
1174 /**
1175 * Returns whether enableInputMethods should be set to true for peered
1176 * TextComponent instances on this platform. False by default.
1177 */
1178 public boolean enableInputMethodsForTextComponent() {
1179 return false;
1180 }
1181
1182 private static Locale startupLocale = null;
1183
1184 /**
1185 * Returns the locale in which the runtime was started.
1186 */
1187 public static Locale getStartupLocale() {
1188 if (startupLocale == null) {
1189 String language, region, country, variant;
1190 language = AccessController.doPrivileged(
1191 new GetPropertyAction("user.language", "en"));
1192 // for compatibility, check for old user.region property
1193 region = AccessController.doPrivileged(
1194 new GetPropertyAction("user.region"));
1195 if (region != null) {
1196 // region can be of form country, country_variant, or _variant
1197 int i = region.indexOf('_');
1198 if (i >= 0) {
1199 country = region.substring(0, i);
1200 variant = region.substring(i + 1);
1201 } else {
1202 country = region;
1203 variant = "";
1204 }
1205 } else {
1206 country = AccessController.doPrivileged(
1207 new GetPropertyAction("user.country", ""));
1208 variant = AccessController.doPrivileged(
1209 new GetPropertyAction("user.variant", ""));
1210 }
1211 startupLocale = new Locale(language, country, variant);
1212 }
1213 return startupLocale;
1214 }
1215
1216 /**
1217 * Returns the default keyboard locale of the underlying operating system
1218 */
1219 public Locale getDefaultKeyboardLocale() {
1220 return getStartupLocale();
1221 }
1222
1223 private static String dataTransfererClassName = null;
1224
1225 protected static void setDataTransfererClassName(String className) {
1226 dataTransfererClassName = className;
1227 }
1228
1229 public static String getDataTransfererClassName() {
1230 if (dataTransfererClassName == null) {
1231 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1232 }
1233 return dataTransfererClassName;
1234 }
1235
1236 // Support for window closing event notifications
1237 private transient WindowClosingListener windowClosingListener = null;
1238 /**
1239 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1240 */
1241 public WindowClosingListener getWindowClosingListener() {
1242 return windowClosingListener;
1243 }
1244 /**
1245 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1246 */
1247 public void setWindowClosingListener(WindowClosingListener wcl) {
1248 windowClosingListener = wcl;
1249 }
1250
1251 /**
1252 * @see sun.awt.WindowClosingListener#windowClosingNotify
1253 */
1254 public RuntimeException windowClosingNotify(WindowEvent event) {
1255 if (windowClosingListener != null) {
1256 return windowClosingListener.windowClosingNotify(event);
1257 } else {
1258 return null;
1259 }
1260 }
1261 /**
1262 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1263 */
1264 public RuntimeException windowClosingDelivered(WindowEvent event) {
1265 if (windowClosingListener != null) {
1266 return windowClosingListener.windowClosingDelivered(event);
1267 } else {
1268 return null;
1269 }
1270 }
1271
1272 private static DefaultMouseInfoPeer mPeer = null;
1273
1274 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1275 if (mPeer == null) {
1276 mPeer = new DefaultMouseInfoPeer();
1277 }
1278 return mPeer;
1279 }
1280
1281
1282 /**
1283 * Returns whether default toolkit needs the support of the xembed
1284 * from embedding host(if any).
1285 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1286 */
1287 public static boolean needsXEmbed() {
1288 String noxembed = AccessController.
1289 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1290 if ("true".equals(noxembed)) {
1291 return false;
1292 }
1293
1294 Toolkit tk = Toolkit.getDefaultToolkit();
1295 if (tk instanceof SunToolkit) {
1296 // SunToolkit descendants should override this method to specify
1297 // concrete behavior
1298 return ((SunToolkit)tk).needsXEmbedImpl();
1299 } else {
1300 // Non-SunToolkit doubtly might support XEmbed
1301 return false;
1302 }
1303 }
1304
1305 /**
1306 * Returns whether this toolkit needs the support of the xembed
1307 * from embedding host(if any).
1308 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1309 */
1310 protected boolean needsXEmbedImpl() {
1311 return false;
1312 }
1313
1314 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1315
1316 /**
1317 * Returns whether the XEmbed server feature is requested by
1318 * developer. If true, Toolkit should return an
1319 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1320 */
1321 protected final boolean isXEmbedServerRequested() {
1322 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1323 }
1324
1325 /**
1326 * Returns whether the modal exclusion API is supported by the current toolkit.
1327 * When it isn't supported, calling <code>setModalExcluded</code> has no
1328 * effect, and <code>isModalExcluded</code> returns false for all windows.
1329 *
1330 * @return true if modal exclusion is supported by the toolkit, false otherwise
1331 *
1332 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1333 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1334 *
1335 * @since 1.5
1336 */
1337 public static boolean isModalExcludedSupported()
1338 {
1339 Toolkit tk = Toolkit.getDefaultToolkit();
1340 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1341 }
1342 /*
1343 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1344 *
1345 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1346 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1347 *
1348 * @since 1.5
1349 */
1350 protected boolean isModalExcludedSupportedImpl()
1351 {
1352 return false;
1353 }
1354
1355 /*
1356 * Sets this window to be excluded from being modally blocked. When the
1357 * toolkit supports modal exclusion and this method is called, input
1358 * events, focus transfer and z-order will continue to work for the
1359 * window, it's owned windows and child components, even in the
1360 * presence of a modal dialog.
1361 * For details on which <code>Window</code>s are normally blocked
1362 * by modal dialog, see {@link java.awt.Dialog}.
1363 * Invoking this method when the modal exclusion API is not supported by
1364 * the current toolkit has no effect.
1365 * @param window Window to be marked as not modally blocked
1366 * @see java.awt.Dialog
1367 * @see java.awt.Dialog#setModal(boolean)
1368 * @see sun.awt.SunToolkit#isModalExcludedSupported
1369 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1370 */
1371 public static void setModalExcluded(Window window)
1372 {
1373 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1374 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1375 }
1376 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1377 }
1378
1379 /*
1380 * Returns whether the specified window is blocked by modal dialogs.
1381 * If the modal exclusion API isn't supported by the current toolkit,
1382 * it returns false for all windows.
1383 *
1384 * @param window Window to test for modal exclusion
1385 *
1386 * @return true if the window is modal excluded, false otherwise. If
1387 * the modal exclusion isn't supported by the current Toolkit, false
1388 * is returned
1389 *
1390 * @see sun.awt.SunToolkit#isModalExcludedSupported
1391 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1392 *
1393 * @since 1.5
1394 */
1395 public static boolean isModalExcluded(Window window)
1396 {
1397 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1398 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1399 }
1400 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1401 }
1402
1403 /**
1404 * Overridden in XToolkit and WToolkit
1405 */
1406 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1407 return (modalityType == Dialog.ModalityType.MODELESS) ||
1408 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1409 }
1410
1411 /**
1412 * Overridden in XToolkit and WToolkit
1413 */
1414 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1415 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1416 }
1417
1418 ///////////////////////////////////////////////////////////////////////////
1419 //
1420 // The following is used by the Java Plug-in to coordinate dialog modality
1421 // between containing applications (browsers, ActiveX containers etc) and
1422 // the AWT.
1423 //
1424 ///////////////////////////////////////////////////////////////////////////
1425
1426 private ModalityListenerList modalityListeners = new ModalityListenerList();
1427
1428 public void addModalityListener(ModalityListener listener) {
1429 modalityListeners.add(listener);
1430 }
1431
1432 public void removeModalityListener(ModalityListener listener) {
1433 modalityListeners.remove(listener);
1434 }
1435
1436 public void notifyModalityPushed(Dialog dialog) {
1437 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1438 }
1439
1440 public void notifyModalityPopped(Dialog dialog) {
1441 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1442 }
1443
1444 final void notifyModalityChange(int id, Dialog source) {
1445 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1446 ev.dispatch();
1447 }
1448
1449 static class ModalityListenerList implements ModalityListener {
1450
1451 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1452
1453 void add(ModalityListener listener) {
1454 listeners.addElement(listener);
1455 }
1456
1457 void remove(ModalityListener listener) {
1458 listeners.removeElement(listener);
1459 }
1460
1461 public void modalityPushed(ModalityEvent ev) {
1462 Iterator<ModalityListener> it = listeners.iterator();
1463 while (it.hasNext()) {
1464 it.next().modalityPushed(ev);
1465 }
1466 }
1467
1468 public void modalityPopped(ModalityEvent ev) {
1469 Iterator<ModalityListener> it = listeners.iterator();
1470 while (it.hasNext()) {
1471 it.next().modalityPopped(ev);
1472 }
1473 }
1474 } // end of class ModalityListenerList
1475
1476 ///////////////////////////////////////////////////////////////////////////
1477 // End Plug-in code
1478 ///////////////////////////////////////////////////////////////////////////
1479
1480 public static boolean isLightweightOrUnknown(Component comp) {
1481 if (comp.isLightweight()
1482 || !(getDefaultToolkit() instanceof SunToolkit))
1483 {
1484 return true;
1485 }
1486 return !(comp instanceof Button
1487 || comp instanceof Canvas
1488 || comp instanceof Checkbox
1489 || comp instanceof Choice
1490 || comp instanceof Label
1491 || comp instanceof java.awt.List
1492 || comp instanceof Panel
1493 || comp instanceof Scrollbar
1494 || comp instanceof ScrollPane
1495 || comp instanceof TextArea
1496 || comp instanceof TextField
1497 || comp instanceof Window);
1498 }
1499
1500 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) {
1501 Method res = null;
1502 try {
1503 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1504 public Method run() throws Exception {
1505 Method m = clz.getDeclaredMethod(methodName, params);
1506 m.setAccessible(true);
1507 return m;
1508 }
1509 });
1510 } catch (PrivilegedActionException ex) {
1511 ex.printStackTrace();
1512 }
1513 return res;
1514 }
1515
1516 @SuppressWarnings("serial")
1517 public static class OperationTimedOut extends RuntimeException {
1518 public OperationTimedOut(String msg) {
1519 super(msg);
1520 }
1521 public OperationTimedOut() {
1522 }
1523 }
1524
1525 @SuppressWarnings("serial")
1526 public static class InfiniteLoop extends RuntimeException {
1527 }
1528
1529 @SuppressWarnings("serial")
1530 public static class IllegalThreadException extends RuntimeException {
1531 public IllegalThreadException(String msg) {
1532 super(msg);
1533 }
1534 public IllegalThreadException() {
1535 }
1536 }
1537
1538 public static final int DEFAULT_WAIT_TIME = 10000;
1539 private static final int MAX_ITERS = 20;
1540 private static final int MIN_ITERS = 0;
1541 private static final int MINIMAL_EDELAY = 0;
1542
1543 /**
1544 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1545 */
1546 public void realSync() throws OperationTimedOut, InfiniteLoop {
1547 realSync(DEFAULT_WAIT_TIME);
1548 }
1549
1550 /**
1551 * Forces toolkit to synchronize with the native windowing
1552 * sub-system, flushing all pending work and waiting for all the
1553 * events to be processed. This method guarantees that after
1554 * return no additional Java events will be generated, unless
1555 * cause by user. Obviously, the method cannot be used on the
1556 * event dispatch thread (EDT). In case it nevertheless gets
1557 * invoked on this thread, the method throws the
1558 * IllegalThreadException runtime exception.
1559 *
1560 * <p> This method allows to write tests without explicit timeouts
1561 * or wait for some event. Example:
1562 * <code>
1563 * Frame f = ...;
1564 * f.setVisible(true);
1565 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1566 * </code>
1567 *
1568 * <p> After realSync, <code>f</code> will be completely visible
1569 * on the screen, its getLocationOnScreen will be returning the
1570 * right result and it will be the focus owner.
1571 *
1572 * <p> Another example:
1573 * <code>
1574 * b.requestFocus();
1575 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1576 * </code>
1577 *
1578 * <p> After realSync, <code>b</code> will be focus owner.
1579 *
1580 * <p> Notice that realSync isn't guaranteed to work if recurring
1581 * actions occur, such as if during processing of some event
1582 * another request which may generate some events occurs. By
1583 * default, sync tries to perform as much as {@value MAX_ITERS}
1584 * cycles of event processing, allowing for roughly {@value
1585 * MAX_ITERS} additional requests.
1586 *
1587 * <p> For example, requestFocus() generates native request, which
1588 * generates one or two Java focus events, which then generate a
1589 * serie of paint events, a serie of Java focus events, which then
1590 * generate a serie of paint events which then are processed -
1591 * three cycles, minimum.
1592 *
1593 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1594 */
1595 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1596 {
1597 if (EventQueue.isDispatchThread()) {
1598 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1599 }
1600 int bigLoop = 0;
1601 do {
1602 // Let's do sync first
1603 sync();
1604
1605 // During the wait process, when we were processing incoming
1606 // events, we could have made some new request, which can
1607 // generate new events. Example: MapNotify/XSetInputFocus.
1608 // Therefore, we dispatch them as long as there is something
1609 // to dispatch.
1610 int iters = 0;
1611 while (iters < MIN_ITERS) {
1612 syncNativeQueue(timeout);
1613 iters++;
1614 }
1615 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1616 iters++;
1617 }
1618 if (iters >= MAX_ITERS) {
1619 throw new InfiniteLoop();
1620 }
1621
1622 // native requests were dispatched by X/Window Manager or Windows
1623 // Moreover, we processed them all on Toolkit thread
1624 // Now wait while EDT processes them.
1625 //
1626 // During processing of some events (focus, for example),
1627 // some other events could have been generated. So, after
1628 // waitForIdle, we may end up with full EventQueue
1629 iters = 0;
1630 while (iters < MIN_ITERS) {
1631 waitForIdle(timeout);
1632 iters++;
1633 }
1634 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1635 iters++;
1636 }
1637 if (iters >= MAX_ITERS) {
1638 throw new InfiniteLoop();
1639 }
1640
1641 bigLoop++;
1642 // Again, for Java events, it was simple to check for new Java
1643 // events by checking event queue, but what if Java events
1644 // resulted in native requests? Therefor, check native events again.
1645 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1646 }
1647
1648 /**
1649 * Platform toolkits need to implement this method to perform the
1650 * sync of the native queue. The method should wait until native
1651 * requests are processed, all native events are processed and
1652 * corresponding Java events are generated. Should return
1653 * <code>true</code> if some events were processed,
1654 * <code>false</code> otherwise.
1655 */
1656 protected abstract boolean syncNativeQueue(final long timeout);
1657
1658 private boolean eventDispatched = false;
1659 private boolean queueEmpty = false;
1660 private final Object waitLock = "Wait Lock";
1661
1662 static Method eqNoEvents;
1663
1664 private boolean isEQEmpty() {
1665 EventQueue queue = getSystemEventQueueImpl();
1666 synchronized(SunToolkit.class) {
1667 if (eqNoEvents == null) {
1668 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1669 }
1670 }
1671 try {
1672 return (Boolean)eqNoEvents.invoke(queue);
1673 } catch (Exception e) {
1674 e.printStackTrace();
1675 return false;
1676 }
1677 }
1678
1679 /**
1680 * Waits for the Java event queue to empty. Ensures that all
1681 * events are processed (including paint events), and that if
1682 * recursive events were generated, they are also processed.
1683 * Should return <code>true</code> if more processing is
1684 * necessary, <code>false</code> otherwise.
1685 */
1686 @SuppressWarnings("serial")
1687 protected final boolean waitForIdle(final long timeout) {
1688 flushPendingEvents();
1689 boolean queueWasEmpty = isEQEmpty();
1690 queueEmpty = false;
1691 eventDispatched = false;
1692 synchronized(waitLock) {
1693 postEvent(AppContext.getAppContext(),
1694 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1695 public void dispatch() {
1696 // Here we block EDT. It could have some
1697 // events, it should have dispatched them by
1698 // now. So native requests could have been
1699 // generated. First, dispatch them. Then,
1700 // flush Java events again.
1701 int iters = 0;
1702 while (iters < MIN_ITERS) {
1703 syncNativeQueue(timeout);
1704 iters++;
1705 }
1706 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1707 iters++;
1708 }
1709 flushPendingEvents();
1710
1711 synchronized(waitLock) {
1712 queueEmpty = isEQEmpty();
1713 eventDispatched = true;
1714 waitLock.notifyAll();
1715 }
1716 }
1717 });
1718 try {
1719 while (!eventDispatched) {
1720 waitLock.wait();
1721 }
1722 } catch (InterruptedException ie) {
1723 return false;
1724 }
1725 }
1726
1727 try {
1728 Thread.sleep(MINIMAL_EDELAY);
1729 } catch (InterruptedException ie) {
1730 throw new RuntimeException("Interrupted");
1731 }
1732
1733 flushPendingEvents();
1734
1735 // Lock to force write-cache flush for queueEmpty.
1736 synchronized (waitLock) {
1737 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1738 }
1739 }
1740
1741 /**
1742 * Grabs the mouse input for the given window. The window must be
1743 * visible. The window or its children do not receive any
1744 * additional mouse events besides those targeted to them. All
1745 * other events will be dispatched as before - to the respective
1746 * targets. This Window will receive UngrabEvent when automatic
1747 * ungrab is about to happen. The event can be listened to by
1748 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1749 * UngrabEvent class for the list of conditions when ungrab is
1750 * about to happen.
1751 * @see UngrabEvent
1752 */
1753 public abstract void grab(Window w);
1754
1755 /**
1756 * Forces ungrab. No event will be sent.
1757 */
1758 public abstract void ungrab(Window w);
1759
1760
1761 /**
1762 * Locates the splash screen library in a platform dependent way and closes
1763 * the splash screen. Should be invoked on first top-level frame display.
1764 * @see java.awt.SplashScreen
1765 * @since 1.6
1766 */
1767 public static native void closeSplashScreen();
1768
1769 /* The following methods and variables are to support retrieving
1770 * desktop text anti-aliasing settings
1771 */
1772
1773 /* Need an instance method because setDesktopProperty(..) is protected. */
1774 private void fireDesktopFontPropertyChanges() {
1775 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1776 SunToolkit.getDesktopFontHints());
1777 }
1778
1779 private static boolean checkedSystemAAFontSettings;
1780 private static boolean useSystemAAFontSettings;
1781 private static boolean lastExtraCondition = true;
1782 private static RenderingHints desktopFontHints;
1783
1784 /* Since Swing is the reason for this "extra condition" logic its
1785 * worth documenting it in some detail.
1786 * First, a goal is for Swing and applications to both retrieve and
1787 * use the same desktop property value so that there is complete
1788 * consistency between the settings used by JDK's Swing implementation
1789 * and 3rd party custom Swing components, custom L&Fs and any general
1790 * text rendering that wants to be consistent with these.
1791 * But by default on Solaris & Linux Swing will not use AA text over
1792 * remote X11 display (unless Xrender can be used which is TBD and may not
1793 * always be available anyway) as that is a noticeable performance hit.
1794 * So there needs to be a way to express that extra condition so that
1795 * it is seen by all clients of the desktop property API.
1796 * If this were the only condition it could be handled here as it would
1797 * be the same for any L&F and could reasonably be considered to be
1798 * a static behaviour of those systems.
1799 * But GTK currently has an additional test based on locale which is
1800 * not applied by Metal. So mixing GTK in a few locales with Metal
1801 * would mean the last one wins.
1802 * This could be stored per-app context which would work
1803 * for different applets, but wouldn't help for a single application
1804 * using GTK and some other L&F concurrently.
1805 * But it is expected this will be addressed within GTK and the font
1806 * system so is a temporary and somewhat unlikely harmless corner case.
1807 */
1808 public static void setAAFontSettingsCondition(boolean extraCondition) {
1809 if (extraCondition != lastExtraCondition) {
1810 lastExtraCondition = extraCondition;
1811 if (checkedSystemAAFontSettings) {
1812 /* Someone already asked for this info, under a different
1813 * condition.
1814 * We'll force re-evaluation instead of replicating the
1815 * logic, then notify any listeners of any change.
1816 */
1817 checkedSystemAAFontSettings = false;
1818 Toolkit tk = Toolkit.getDefaultToolkit();
1819 if (tk instanceof SunToolkit) {
1820 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1821 }
1822 }
1823 }
1824 }
1825
1826 /* "false", "off", ""default" aren't explicitly tested, they
1827 * just fall through to produce a null return which all are equated to
1828 * "false".
1829 */
1830 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1831 Object aaHint = null;
1832 hintname = hintname.toLowerCase(Locale.ENGLISH);
1833 if (hintname.equals("on")) {
1834 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1835 } else if (hintname.equals("gasp")) {
1836 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1837 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1838 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1839 } else if (hintname.equals("lcd_hbgr")) {
1840 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1841 } else if (hintname.equals("lcd_vrgb")) {
1842 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1843 } else if (hintname.equals("lcd_vbgr")) {
1844 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1845 }
1846 if (aaHint != null) {
1847 RenderingHints map = new RenderingHints(null);
1848 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1849 return map;
1850 } else {
1851 return null;
1852 }
1853 }
1854
1855 /* This method determines whether to use the system font settings,
1856 * or ignore them if a L&F has specified they should be ignored, or
1857 * to override both of these with a system property specified value.
1858 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1859 * system property isn't applied as desktop properties are considered
1860 * to be inapplicable in that case. In that headless case although
1861 * this method will return "true" the toolkit will return a null map.
1862 */
1863 private static boolean useSystemAAFontSettings() {
1864 if (!checkedSystemAAFontSettings) {
1865 useSystemAAFontSettings = true; /* initially set this true */
1866 String systemAAFonts = null;
1867 Toolkit tk = Toolkit.getDefaultToolkit();
1868 if (tk instanceof SunToolkit) {
1869 systemAAFonts =
1870 AccessController.doPrivileged(
1871 new GetPropertyAction("awt.useSystemAAFontSettings"));
1872 }
1873 if (systemAAFonts != null) {
1874 useSystemAAFontSettings =
1875 Boolean.valueOf(systemAAFonts).booleanValue();
1876 /* If it is anything other than "true", then it may be
1877 * a hint name , or it may be "off, "default", etc.
1878 */
1879 if (!useSystemAAFontSettings) {
1880 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1881 }
1882 }
1883 /* If its still true, apply the extra condition */
1884 if (useSystemAAFontSettings) {
1885 useSystemAAFontSettings = lastExtraCondition;
1886 }
1887 checkedSystemAAFontSettings = true;
1888 }
1889 return useSystemAAFontSettings;
1890 }
1891
1892 /* A variable defined for the convenience of JDK code */
1893 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1894
1895 /* Overridden by subclasses to return platform/desktop specific values */
1896 protected RenderingHints getDesktopAAHints() {
1897 return null;
1898 }
1899
1900 /* Subclass desktop property loading methods call this which
1901 * in turn calls the appropriate subclass implementation of
1902 * getDesktopAAHints() when system settings are being used.
1903 * Its public rather than protected because subclasses may delegate
1904 * to a helper class.
1905 */
1906 public static RenderingHints getDesktopFontHints() {
1907 if (useSystemAAFontSettings()) {
1908 Toolkit tk = Toolkit.getDefaultToolkit();
1909 if (tk instanceof SunToolkit) {
1910 Object map = ((SunToolkit)tk).getDesktopAAHints();
1911 return (RenderingHints)map;
1912 } else { /* Headless Toolkit */
1913 return null;
1914 }
1915 } else if (desktopFontHints != null) {
1916 /* cloning not necessary as the return value is cloned later, but
1917 * its harmless.
1918 */
1919 return (RenderingHints)(desktopFontHints.clone());
1920 } else {
1921 return null;
1922 }
1923 }
1924
1925
1926 public abstract boolean isDesktopSupported();
1927
1928 /*
1929 * consumeNextKeyTyped() method is not currently used,
1930 * however Swing could use it in the future.
1931 */
1932 private static Method consumeNextKeyTypedMethod = null;
1933 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1934 if (consumeNextKeyTypedMethod == null) {
1935 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1936 "consumeNextKeyTyped",
1937 new Class<?>[] {KeyEvent.class});
1938 }
1939 try {
1940 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1941 keyEvent);
1942 } catch (IllegalAccessException iae) {
1943 iae.printStackTrace();
1944 } catch (InvocationTargetException ite) {
1945 ite.printStackTrace();
1946 }
1947 }
1948
1949 protected static void dumpPeers(final PlatformLogger aLog) {
1950 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1951 }
1952
1953 /**
1954 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1955 * @return Window ancestor of the component or component by itself if it is Window;
1956 * null, if component is not a part of window hierarchy
1957 */
1958 public static Window getContainingWindow(Component comp) {
1959 while (comp != null && !(comp instanceof Window)) {
1960 comp = comp.getParent();
1961 }
1962 return (Window)comp;
1963 }
1964
1965 /**
1966 * Returns the value of the system property indicated by the specified key.
1967 */
1968 public static String getSystemProperty(final String key) {
1969 return AccessController.doPrivileged(new PrivilegedAction<String>() {
1970 public String run() {
1971 return System.getProperty(key);
1972 }
1973 });
1974 }
1975
1976 /**
1977 * Returns the boolean value of the system property indicated by the specified key.
1978 */
1979 protected static Boolean getBooleanSystemProperty(String key) {
1980 return AccessController.doPrivileged(new GetBooleanAction(key));
1981 }
1982
1983 private static Boolean sunAwtDisableMixing = null;
1984
1985 /**
1986 * Returns the value of "sun.awt.disableMixing" property. Default
1987 * value is {@code false}.
1988 */
1989 public synchronized static boolean getSunAwtDisableMixing() {
1990 if (sunAwtDisableMixing == null) {
1991 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1992 }
1993 return sunAwtDisableMixing.booleanValue();
1994 }
1995
1996 /**
1997 * Returns true if the native GTK libraries are available. The
1998 * default implementation returns false, but UNIXToolkit overrides this
1999 * method to provide a more specific answer.
2000 */
2001 public boolean isNativeGTKAvailable() {
2002 return false;
2003 }
2004
2005 // Cosntant alpha
2006 public boolean isWindowOpacitySupported() {
2007 return false;
2008 }
2009
2010 // Shaping
2011 public boolean isWindowShapingSupported() {
2012 return false;
2013 }
2014
2015 // Per-pixel alpha
2016 public boolean isWindowTranslucencySupported() {
2017 return false;
2018 }
2019
2020 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
2021 return false;
2022 }
2023
2024 /**
2025 * Returns whether or not a containing top level window for the passed
2026 * component is
2027 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
2028 *
2029 * @param c a Component which toplevel's to check
2030 * @return {@code true} if the passed component is not null and has a
2031 * containing toplevel window which is opaque (so per-pixel translucency
2032 * is not enabled), {@code false} otherwise
2033 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
2034 */
2035 public static boolean isContainingTopLevelOpaque(Component c) {
2036 Window w = getContainingWindow(c);
2037 return w != null && w.isOpaque();
2038 }
2039
2040 /**
2041 * Returns whether or not a containing top level window for the passed
2042 * component is
2043 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2044 *
2045 * @param c a Component which toplevel's to check
2046 * @return {@code true} if the passed component is not null and has a
2047 * containing toplevel window which has opacity less than
2048 * 1.0f (which means that it is translucent), {@code false} otherwise
2049 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2050 */
2051 public static boolean isContainingTopLevelTranslucent(Component c) {
2052 Window w = getContainingWindow(c);
2053 return w != null && w.getOpacity() < 1.0f;
2054 }
2055
2056 /**
2057 * Returns whether the native system requires using the peer.updateWindow()
2058 * method to update the contents of a non-opaque window, or if usual
2059 * painting procedures are sufficient. The default return value covers
2060 * the X11 systems. On MS Windows this method is overriden in WToolkit
2061 * to return true.
2062 */
2063 public boolean needUpdateWindow() {
2064 return false;
2065 }
2066
2067 /**
2068 * Descendants of the SunToolkit should override and put their own logic here.
2069 */
2070 public int getNumberOfButtons(){
2071 return 3;
2072 }
2073
2074 /**
2075 * Checks that the given object implements/extends the given
2076 * interface/class.
2077 *
2078 * Note that using the instanceof operator causes a class to be loaded.
2079 * Using this method doesn't load a class and it can be used instead of
2080 * the instanceof operator for performance reasons.
2081 *
2082 * @param obj Object to be checked
2083 * @param type The name of the interface/class. Must be
2084 * fully-qualified interface/class name.
2085 * @return true, if this object implements/extends the given
2086 * interface/class, false, otherwise, or if obj or type is null
2087 */
2088 public static boolean isInstanceOf(Object obj, String type) {
2089 if (obj == null) return false;
2090 if (type == null) return false;
2091
2092 return isInstanceOf(obj.getClass(), type);
2093 }
2094
2095 private static boolean isInstanceOf(Class<?> cls, String type) {
2096 if (cls == null) return false;
2097
2098 if (cls.getName().equals(type)) {
2099 return true;
2100 }
2101
2102 for (Class<?> c : cls.getInterfaces()) {
2103 if (c.getName().equals(type)) {
2104 return true;
2105 }
2106 }
2107 return isInstanceOf(cls.getSuperclass(), type);
2108 }
2109
2110 ///////////////////////////////////////////////////////////////////////////
2111 //
2112 // The following methods help set and identify whether a particular
2113 // AWTEvent object was produced by the system or by user code. As of this
2114 // writing the only consumer is the Java Plug-In, although this information
2115 // could be useful to more clients and probably should be formalized in
2116 // the public API.
2117 //
2118 ///////////////////////////////////////////////////////////////////////////
2119
2120 public static void setSystemGenerated(AWTEvent e) {
2121 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2122 }
2123
2124 public static boolean isSystemGenerated(AWTEvent e) {
2125 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2126 }
2127
2128 } // class SunToolkit
2129
2130
2131 /*
2132 * PostEventQueue is a Thread that runs in the same AppContext as the
2133 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2134 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2135 * events to this queue, which then calls EventQueue.postEvent().
2136 *
2137 * We do this because EventQueue.postEvent() may be overridden by client
2138 * code, and we mustn't ever call client code from the toolkit thread.
2139 */
2140 class PostEventQueue {
2141 private EventQueueItem queueHead = null;
2142 private EventQueueItem queueTail = null;
2143 private final EventQueue eventQueue;
2144
2145 PostEventQueue(EventQueue eq) {
2146 eventQueue = eq;
2147 }
2148
2149 public synchronized boolean noEvents() {
2150 return queueHead == null;
2151 }
2152
2153 /*
2154 * Continually post pending AWTEvents to the Java EventQueue. The method
2155 * is synchronized to ensure the flush is completed before a new event
2156 * can be posted to this queue.
2157 */
2158 public synchronized void flush() {
2159 EventQueueItem tempQueue = queueHead;
2160 queueHead = queueTail = null;
2161 while (tempQueue != null) {
2162 eventQueue.postEvent(tempQueue.event);
2163 tempQueue = tempQueue.next;
2164 }
2165 }
2166
2167 /*
2168 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2169 */
2170 void postEvent(AWTEvent event) {
2171 EventQueueItem item = new EventQueueItem(event);
2172
2173 synchronized (this) {
2174 if (queueHead == null) {
2175 queueHead = queueTail = item;
2176 } else {
2177 queueTail.next = item;
2178 queueTail = item;
2179 }
2180 }
2181 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2182 }
2183 } // class PostEventQueue