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