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 public SunToolkit() {
105 Runnable initEQ = new Runnable() {
106 public void run () {
107 EventQueue eventQueue;
108
109 String eqName = System.getProperty("AWT.EventQueueClass",
110 "java.awt.EventQueue");
111
112 try {
113 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
114 } catch (Exception e) {
115 e.printStackTrace();
116 System.err.println("Failed loading " + eqName + ": " + e);
117 eventQueue = new EventQueue();
118 }
119 AppContext appContext = AppContext.getAppContext();
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
127 initEQ.run();
128 }
129
130 public boolean useBufferPerWindow() {
131 return false;
132 }
133
134 public abstract WindowPeer createWindow(Window target)
135 throws HeadlessException;
136
137 public abstract FramePeer createFrame(Frame target)
138 throws HeadlessException;
139
140 public abstract DialogPeer createDialog(Dialog target)
141 throws HeadlessException;
142
143 public abstract ButtonPeer createButton(Button target)
144 throws HeadlessException;
145
146 public abstract TextFieldPeer createTextField(TextField target)
147 throws HeadlessException;
148
149 public abstract ChoicePeer createChoice(Choice target)
150 throws HeadlessException;
151
152 public abstract LabelPeer createLabel(Label target)
153 throws HeadlessException;
154
155 public abstract ListPeer createList(java.awt.List target)
156 throws HeadlessException;
157
158 public abstract CheckboxPeer createCheckbox(Checkbox target)
159 throws HeadlessException;
160
161 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
162 throws HeadlessException;
163
164 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
165 throws HeadlessException;
166
167 public abstract TextAreaPeer createTextArea(TextArea target)
168 throws HeadlessException;
169
170 public abstract FileDialogPeer createFileDialog(FileDialog target)
171 throws HeadlessException;
172
173 public abstract MenuBarPeer createMenuBar(MenuBar target)
174 throws HeadlessException;
175
176 public abstract MenuPeer createMenu(Menu target)
177 throws HeadlessException;
178
179 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
180 throws HeadlessException;
181
182 public abstract MenuItemPeer createMenuItem(MenuItem target)
183 throws HeadlessException;
184
185 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
186 CheckboxMenuItem target)
187 throws HeadlessException;
188
189 public abstract DragSourceContextPeer createDragSourceContextPeer(
190 DragGestureEvent dge)
191 throws InvalidDnDOperationException;
192
193 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
194 throws HeadlessException, AWTException;
195
196 public abstract SystemTrayPeer createSystemTray(SystemTray target);
197
198 public abstract boolean isTraySupported();
199
200 public abstract FontPeer getFontPeer(String name, int style);
201
202 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
203 throws AWTException;
204
205 public abstract KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager)
206 throws HeadlessException;
207
208 /**
209 * The AWT lock is typically only used on Unix platforms to synchronize
210 * access to Xlib, OpenGL, etc. However, these methods are implemented
211 * in SunToolkit so that they can be called from shared code (e.g.
212 * from the OGL pipeline) or from the X11 pipeline regardless of whether
213 * XToolkit or MToolkit is currently in use. There are native macros
214 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
215 * methods is changed, make sure it is compatible with the native macros.
216 *
217 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
218 * used in place of:
219 * synchronized (getAWTLock()) {
220 * ...
221 * }
222 *
223 * By factoring these methods out specially, we are able to change the
224 * implementation of these methods (e.g. use more advanced locking
225 * mechanisms) without impacting calling code.
226 *
227 * Sample usage:
228 * private void doStuffWithXlib() {
229 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
230 * SunToolkit.awtLock();
231 * try {
232 * ...
233 * XlibWrapper.XDoStuff();
234 * } finally {
235 * SunToolkit.awtUnlock();
236 * }
237 * }
238 */
239
240 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
241 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
242
243 public static final void awtLock() {
244 AWT_LOCK.lock();
245 }
246
247 public static final boolean awtTryLock() {
248 return AWT_LOCK.tryLock();
249 }
250
251 public static final void awtUnlock() {
252 AWT_LOCK.unlock();
253 }
254
255 public static final void awtLockWait()
256 throws InterruptedException
257 {
258 AWT_LOCK_COND.await();
259 }
260
261 public static final void awtLockWait(long timeout)
262 throws InterruptedException
263 {
264 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
265 }
266
267 public static final void awtLockNotify() {
268 AWT_LOCK_COND.signal();
269 }
270
271 public static final void awtLockNotifyAll() {
272 AWT_LOCK_COND.signalAll();
273 }
274
275 public static final boolean isAWTLockHeldByCurrentThread() {
276 return AWT_LOCK.isHeldByCurrentThread();
277 }
278
279 /*
280 * Create a new AppContext, along with its EventQueue, for a
281 * new ThreadGroup. Browser code, for example, would use this
282 * method to create an AppContext & EventQueue for an Applet.
283 */
284 public static AppContext createNewAppContext() {
285 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
286 // Create appContext before initialization of EventQueue, so all
287 // the calls to AppContext.getAppContext() from EventQueue ctor
288 // return correct values
289 AppContext appContext = new AppContext(threadGroup);
290
291 EventQueue eventQueue;
292 String eqName = System.getProperty("AWT.EventQueueClass",
293 "java.awt.EventQueue");
294 try {
295 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
296 } catch (Exception e) {
297 System.err.println("Failed loading " + eqName + ": " + e);
298 eventQueue = new EventQueue();
299 }
300 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
301
302 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
303 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
304
305 return appContext;
306 }
307
308 public static Field getField(final Class klass, final String fieldName) {
309 return AccessController.doPrivileged(new PrivilegedAction<Field>() {
310 public Field run() {
311 try {
312 Field field = klass.getDeclaredField(fieldName);
313 assert (field != null);
314 field.setAccessible(true);
315 return field;
316 } catch (SecurityException e) {
317 assert false;
318 } catch (NoSuchFieldException e) {
319 assert false;
320 }
321 return null;
322 }//run
323 });
324 }
325
326 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
327 if (wakeupMethod == null){
328 wakeupMethod = (Method)AccessController.doPrivileged(new PrivilegedAction(){
329 public Object run(){
330 try {
331 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} );
332 if (method != null) {
333 method.setAccessible(true);
334 }
335 return method;
336 } catch (NoSuchMethodException e) {
337 assert false;
338 } catch (SecurityException e) {
339 assert false;
340 }
341 return null;
342 }//run
343 });
344 }
345 try{
346 if (wakeupMethod != null){
347 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)});
348 }
349 } catch (InvocationTargetException e){
350 assert false;
351 } catch (IllegalAccessException e) {
352 assert false;
353 }
354 }
355
356 /*
357 * Fetch the peer associated with the given target (as specified
358 * in the peer creation method). This can be used to determine
359 * things like what the parent peer is. If the target is null
360 * or the target can't be found (either because the a peer was
361 * never created for it or the peer was disposed), a null will
362 * be returned.
363 */
364 protected static Object targetToPeer(Object target) {
365 if (target != null && !GraphicsEnvironment.isHeadless()) {
366 return AWTAutoShutdown.getInstance().getPeer(target);
367 }
368 return null;
369 }
370
371 protected static void targetCreatedPeer(Object target, Object peer) {
372 if (target != null && peer != null &&
373 !GraphicsEnvironment.isHeadless())
374 {
375 AWTAutoShutdown.getInstance().registerPeer(target, peer);
376 }
377 }
378
379 protected static void targetDisposedPeer(Object target, Object peer) {
380 if (target != null && peer != null &&
381 !GraphicsEnvironment.isHeadless())
382 {
383 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
384 }
385 }
386
387 // Maps from non-Component/MenuComponent to AppContext.
388 // WeakHashMap<Component,AppContext>
389 private static final Map appContextMap =
390 Collections.synchronizedMap(new WeakHashMap());
391
392 /**
393 * Sets the appContext field of target. If target is not a Component or
394 * MenuComponent, this returns false.
395 */
396 private static boolean setAppContext(Object target,
397 AppContext context) {
398 if (target instanceof Component) {
399 AWTAccessor.getComponentAccessor().
400 setAppContext((Component)target, context);
401 } else if (target instanceof MenuComponent) {
402 AWTAccessor.getMenuComponentAccessor().
403 setAppContext((MenuComponent)target, context);
404 } else {
405 return false;
406 }
407 return true;
408 }
409
410 /**
411 * Returns the appContext field for target. If target is not a
412 * Component or MenuComponent this returns null.
413 */
414 private static AppContext getAppContext(Object target) {
415 if (target instanceof Component) {
416 return AWTAccessor.getComponentAccessor().
417 getAppContext((Component)target);
418 } else if (target instanceof MenuComponent) {
419 return AWTAccessor.getMenuComponentAccessor().
420 getAppContext((MenuComponent)target);
421 } else {
422 return null;
423 }
424 }
425
426 /*
427 * Fetch the AppContext associated with the given target.
428 * This can be used to determine things like which EventQueue
429 * to use for posting events to a Component. If the target is
430 * null or the target can't be found, a null with be returned.
431 */
432 public static AppContext targetToAppContext(Object target) {
433 if (target == null || GraphicsEnvironment.isHeadless()) {
434 return null;
435 }
436 AppContext context = getAppContext(target);
437 if (context == null) {
438 // target is not a Component/MenuComponent, try the
439 // appContextMap.
440 context = (AppContext)appContextMap.get(target);
441 }
442 return context;
443 }
444
445 /**
446 * Sets the synchronous status of focus requests on lightweight
447 * components in the specified window to the specified value.
448 * If the boolean parameter is <code>true</code> then the focus
449 * requests on lightweight components will be performed
450 * synchronously, if it is <code>false</code>, then asynchronously.
451 * By default, all windows have their lightweight request status
452 * set to asynchronous.
453 * <p>
454 * The application can only set the status of lightweight focus
455 * requests to synchronous for any of its windows if it doesn't
456 * perform focus transfers between different heavyweight containers.
457 * In this case the observable focus behaviour is the same as with
458 * asynchronous status.
459 * <p>
460 * If the application performs focus transfer between different
461 * heavyweight containers and sets the lightweight focus request
462 * status to synchronous for any of its windows, then further focus
463 * behaviour is unspecified.
464 * <p>
465 * @param w window for which the lightweight focus request status
466 * should be set
467 * @param status the value of lightweight focus request status
468 */
469
470 public static void setLWRequestStatus(Window changed,boolean status){
471 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
472 };
473
474 public static void checkAndSetPolicy(Container cont, boolean isSwingCont)
475 {
476 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager
477 .getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy();
478
479 String toolkitName = Toolkit.getDefaultToolkit().getClass().getName();
480 // if this is not XAWT then use default policy
481 // because Swing change it
482 if (!"sun.awt.X11.XToolkit".equals(toolkitName)) {
483 cont.setFocusTraversalPolicy(defaultPolicy);
484 return;
485 }
486
487 String policyName = defaultPolicy.getClass().getName();
488
489 if (DefaultFocusTraversalPolicy.class != defaultPolicy.getClass()) {
490 // Policy was changed
491 // Check if it is awt policy or swing policy
492 // If it is Swing policy we shouldn't use it in AWT frames
493 // If it is AWT policy we shouldn't use it in Swing frames
494 // Otherwise we should use this policy
495 if (policyName.startsWith("java.awt.")) {
496 // AWT
497 if (isSwingCont) {
498 // Can't use AWT policy in Swing windows - should use Swing's one.
499 defaultPolicy = createLayoutPolicy();
500 } else {
501 // New awt policy.
502 }
503 } else if (policyName.startsWith("javax.swing.")) {
504 if (isSwingCont) {
505 // New Swing's policy
506 } else {
507 defaultPolicy = new DefaultFocusTraversalPolicy();
508 }
509 }
510 } else {
511 // Policy is default, use different default policy for swing
512 if (isSwingCont) {
513 defaultPolicy = createLayoutPolicy();
514 }
515 }
516 cont.setFocusTraversalPolicy(defaultPolicy);
517 }
518
519 private static FocusTraversalPolicy createLayoutPolicy() {
520 FocusTraversalPolicy policy = null;
521 try {
522 Class layoutPolicyClass =
523 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
524 policy = (FocusTraversalPolicy) layoutPolicyClass.newInstance();
525 }
526 catch (ClassNotFoundException e) {
527 assert false;
528 }
529 catch (InstantiationException e) {
530 assert false;
531 }
532 catch (IllegalAccessException e) {
533 assert false;
534 }
535
536 return policy;
537 }
538
539 /*
540 * Insert a mapping from target to AppContext, for later retrieval
541 * via targetToAppContext() above.
542 */
543 public static void insertTargetMapping(Object target, AppContext appContext) {
544 if (!GraphicsEnvironment.isHeadless()) {
545 if (!setAppContext(target, appContext)) {
546 // Target is not a Component/MenuComponent, use the private Map
547 // instead.
548 appContextMap.put(target, appContext);
549 }
550 }
551 }
552
553 /*
554 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
555 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
556 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
557 * not be called under another lock since it locks the EventQueue.
558 * See bugids 4632918, 4526597.
559 */
560 public static void postEvent(AppContext appContext, AWTEvent event) {
561 if (event == null) {
562 throw new NullPointerException();
563 }
564 // All events posted via this method are system-generated.
565 // Placing the following call here reduces considerably the
566 // number of places throughout the toolkit that would
567 // otherwise have to be modified to precisely identify
568 // system-generated events.
569 setSystemGenerated(event);
570 AppContext eventContext = targetToAppContext(event.getSource());
571 if (eventContext != null && !eventContext.equals(appContext)) {
572 log.fine("Event posted on wrong app context : " + event);
573 }
574 PostEventQueue postEventQueue =
575 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
576 if (postEventQueue != null) {
577 postEventQueue.postEvent(event);
578 }
579 }
580
581 /*
582 * Post AWTEvent of high priority.
583 */
584 public static void postPriorityEvent(final AWTEvent e) {
585 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
586 public void run() {
587 AWTAccessor.getAWTEventAccessor().setPosted(e);
588 ((Component)e.getSource()).dispatchEvent(e);
589 }
590 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
591 postEvent(targetToAppContext(e.getSource()), pe);
592 }
593
594 private static final Lock flushLock = new ReentrantLock();
595 private static boolean isFlushingPendingEvents = false;
596
597 /*
598 * Flush any pending events which haven't been posted to the AWT
599 * EventQueue yet.
600 */
601 public static void flushPendingEvents() {
602 flushLock.lock();
603 try {
604 // Don't call flushPendingEvents() recursively
605 if (!isFlushingPendingEvents) {
606 isFlushingPendingEvents = true;
607 AppContext appContext = AppContext.getAppContext();
608 PostEventQueue postEventQueue =
609 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
610 if (postEventQueue != null) {
611 postEventQueue.flush();
612 }
613 }
614 } finally {
615 isFlushingPendingEvents = false;
616 flushLock.unlock();
617 }
618 }
619
620 public static boolean isPostEventQueueEmpty() {
621 AppContext appContext = AppContext.getAppContext();
622 PostEventQueue postEventQueue =
623 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
624 if (postEventQueue != null) {
625 return postEventQueue.noEvents();
626 } else {
627 return true;
628 }
629 }
630
631 /*
632 * Execute a chunk of code on the Java event handler thread for the
633 * given target. Does not wait for the execution to occur before
634 * returning to the caller.
635 */
636 public static void executeOnEventHandlerThread(Object target,
637 Runnable runnable) {
638 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
639 }
640
641 /*
642 * Fixed 5064013: the InvocationEvent time should be equals
643 * the time of the ActionEvent
644 */
645 public static void executeOnEventHandlerThread(Object target,
646 Runnable runnable,
647 final long when) {
648 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT){
649 public long getWhen(){
650 return when;
651 }
652 });
653 }
654
655 /*
656 * Execute a chunk of code on the Java event handler thread for the
657 * given target. Does not wait for the execution to occur before
658 * returning to the caller.
659 */
660 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
661 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
662 }
663
664 /*
665 * Execute a chunk of code on the Java event handler thread. The
666 * method takes into account provided AppContext and sets
667 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
668 * event. See 6451487 for detailes.
669 * Does not wait for the execution to occur before returning to
670 * the caller.
671 */
672 public static void invokeLaterOnAppContext(
673 AppContext appContext, Runnable dispatcher)
674 {
675 postEvent(appContext,
676 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
677 PeerEvent.PRIORITY_EVENT));
678 }
679
680 /*
681 * Execute a chunk of code on the Java event handler thread for the
682 * given target. Waits for the execution to occur before returning
683 * to the caller.
684 */
685 public static void executeOnEDTAndWait(Object target, Runnable runnable)
686 throws InterruptedException, InvocationTargetException
687 {
688 if (EventQueue.isDispatchThread()) {
689 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
690 }
691
692 class AWTInvocationLock {}
693 Object lock = new AWTInvocationLock();
694
695 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
696
697 synchronized (lock) {
698 executeOnEventHandlerThread(event);
699 while(!event.isDispatched()) {
700 lock.wait();
701 }
702 }
703
704 Throwable eventThrowable = event.getThrowable();
705 if (eventThrowable != null) {
706 throw new InvocationTargetException(eventThrowable);
707 }
708 }
709
710 /*
711 * Returns true if the calling thread is the event dispatch thread
712 * contained within AppContext which associated with the given target.
713 * Use this call to ensure that a given task is being executed
714 * (or not being) on the event dispatch thread for the given target.
715 */
716 public static boolean isDispatchThreadForAppContext(Object target) {
717 AppContext appContext = targetToAppContext(target);
718 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
719
720 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
721 return accessor.isDispatchThreadImpl(eq);
722 }
723
724 public Dimension getScreenSize() {
725 return new Dimension(getScreenWidth(), getScreenHeight());
726 }
727 protected abstract int getScreenWidth();
728 protected abstract int getScreenHeight();
729
730 public FontMetrics getFontMetrics(Font font) {
731 return FontDesignMetrics.getMetrics(font);
732 }
733
734 public String[] getFontList() {
735 String[] hardwiredFontList = {
736 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
737 Font.DIALOG_INPUT
738
739 // -- Obsolete font names from 1.0.2. It was decided that
740 // -- getFontList should not return these old names:
741 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
742 };
743 return hardwiredFontList;
744 }
745
746 public PanelPeer createPanel(Panel target) {
747 return (PanelPeer)createComponent(target);
748 }
749
750 public CanvasPeer createCanvas(Canvas target) {
751 return (CanvasPeer)createComponent(target);
752 }
753
754 /**
755 * Disables erasing of background on the canvas before painting if
756 * this is supported by the current toolkit. It is recommended to
757 * call this method early, before the Canvas becomes displayable,
758 * because some Toolkit implementations do not support changing
759 * this property once the Canvas becomes displayable.
760 */
761 public void disableBackgroundErase(Canvas canvas) {
762 disableBackgroundEraseImpl(canvas);
763 }
764
765 /**
766 * Disables the native erasing of the background on the given
767 * component before painting if this is supported by the current
768 * toolkit. This only has an effect for certain components such as
769 * Canvas, Panel and Window. It is recommended to call this method
770 * early, before the Component becomes displayable, because some
771 * Toolkit implementations do not support changing this property
772 * once the Component becomes displayable.
773 */
774 public void disableBackgroundErase(Component component) {
775 disableBackgroundEraseImpl(component);
776 }
777
778 private void disableBackgroundEraseImpl(Component component) {
779 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
780 }
781
782 /**
783 * Returns the value of "sun.awt.noerasebackground" property. Default
784 * value is {@code false}.
785 */
786 public static boolean getSunAwtNoerasebackground() {
787 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
788 }
789
790 /**
791 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
792 * value is {@code false}.
793 */
794 public static boolean getSunAwtErasebackgroundonresize() {
795 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
796 }
797
798
799 static final SoftCache imgCache = new SoftCache();
800
801 static Image getImageFromHash(Toolkit tk, URL url) {
802 SecurityManager sm = System.getSecurityManager();
803 if (sm != null) {
804 try {
805 java.security.Permission perm =
806 url.openConnection().getPermission();
807 if (perm != null) {
808 try {
809 sm.checkPermission(perm);
810 } catch (SecurityException se) {
811 // fallback to checkRead/checkConnect for pre 1.2
812 // security managers
813 if ((perm instanceof java.io.FilePermission) &&
814 perm.getActions().indexOf("read") != -1) {
815 sm.checkRead(perm.getName());
816 } else if ((perm instanceof
817 java.net.SocketPermission) &&
818 perm.getActions().indexOf("connect") != -1) {
819 sm.checkConnect(url.getHost(), url.getPort());
820 } else {
821 throw se;
822 }
823 }
824 }
825 } catch (java.io.IOException ioe) {
826 sm.checkConnect(url.getHost(), url.getPort());
827 }
828 }
829 synchronized (imgCache) {
830 Image img = (Image)imgCache.get(url);
831 if (img == null) {
832 try {
833 img = tk.createImage(new URLImageSource(url));
834 imgCache.put(url, img);
835 } catch (Exception e) {
836 }
837 }
838 return img;
839 }
840 }
841
842 static Image getImageFromHash(Toolkit tk,
843 String filename) {
844 SecurityManager security = System.getSecurityManager();
845 if (security != null) {
846 security.checkRead(filename);
847 }
848 synchronized (imgCache) {
849 Image img = (Image)imgCache.get(filename);
850 if (img == null) {
851 try {
852 img = tk.createImage(new FileImageSource(filename));
853 imgCache.put(filename, img);
854 } catch (Exception e) {
855 }
856 }
857 return img;
858 }
859 }
860
861 public Image getImage(String filename) {
862 return getImageFromHash(this, filename);
863 }
864
865 public Image getImage(URL url) {
866 return getImageFromHash(this, url);
867 }
868
869 public Image createImage(String filename) {
870 SecurityManager security = System.getSecurityManager();
871 if (security != null) {
872 security.checkRead(filename);
873 }
874 return createImage(new FileImageSource(filename));
875 }
876
877 public Image createImage(URL url) {
878 SecurityManager sm = System.getSecurityManager();
879 if (sm != null) {
880 try {
881 java.security.Permission perm =
882 url.openConnection().getPermission();
883 if (perm != null) {
884 try {
885 sm.checkPermission(perm);
886 } catch (SecurityException se) {
887 // fallback to checkRead/checkConnect for pre 1.2
888 // security managers
889 if ((perm instanceof java.io.FilePermission) &&
890 perm.getActions().indexOf("read") != -1) {
891 sm.checkRead(perm.getName());
892 } else if ((perm instanceof
893 java.net.SocketPermission) &&
894 perm.getActions().indexOf("connect") != -1) {
895 sm.checkConnect(url.getHost(), url.getPort());
896 } else {
897 throw se;
898 }
899 }
900 }
901 } catch (java.io.IOException ioe) {
902 sm.checkConnect(url.getHost(), url.getPort());
903 }
904 }
905 return createImage(new URLImageSource(url));
906 }
907
908 public Image createImage(byte[] data, int offset, int length) {
909 return createImage(new ByteArrayImageSource(data, offset, length));
910 }
911
912 public Image createImage(ImageProducer producer) {
913 return new ToolkitImage(producer);
914 }
915
916 public int checkImage(Image img, int w, int h, ImageObserver o) {
917 if (!(img instanceof ToolkitImage)) {
918 return ImageObserver.ALLBITS;
919 }
920
921 ToolkitImage tkimg = (ToolkitImage)img;
922 int repbits;
923 if (w == 0 || h == 0) {
924 repbits = ImageObserver.ALLBITS;
925 } else {
926 repbits = tkimg.getImageRep().check(o);
927 }
928 return tkimg.check(o) | repbits;
929 }
930
931 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
932 if (w == 0 || h == 0) {
933 return true;
934 }
935
936 // Must be a ToolkitImage
937 if (!(img instanceof ToolkitImage)) {
938 return true;
939 }
940
941 ToolkitImage tkimg = (ToolkitImage)img;
942 if (tkimg.hasError()) {
943 if (o != null) {
944 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
945 -1, -1, -1, -1);
946 }
947 return false;
948 }
949 ImageRepresentation ir = tkimg.getImageRep();
950 return ir.prepare(o);
951 }
952
953 /**
954 * Scans {@code imageList} for best-looking image of specified dimensions.
955 * Image can be scaled and/or padded with transparency.
956 */
957 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
958 if (width == 0 || height == 0) {
959 return null;
960 }
961 Image bestImage = null;
962 int bestWidth = 0;
963 int bestHeight = 0;
964 double bestSimilarity = 3; //Impossibly high value
965 double bestScaleFactor = 0;
966 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
967 //Iterate imageList looking for best matching image.
968 //'Similarity' measure is defined as good scale factor and small insets.
969 //best possible similarity is 0 (no scale, no insets).
970 //It's found while the experiments that good-looking result is achieved
971 //with scale factors x1, x3/4, x2/3, xN, x1/N.
972 Image im = i.next();
973 if (im == null) {
974 if (log.isLoggable(PlatformLogger.FINER)) {
975 log.finer("SunToolkit.getScaledIconImage: " +
976 "Skipping the image passed into Java because it's null.");
977 }
978 continue;
979 }
980 if (im instanceof ToolkitImage) {
981 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
982 ir.reconstruct(ImageObserver.ALLBITS);
983 }
984 int iw;
985 int ih;
986 try {
987 iw = im.getWidth(null);
988 ih = im.getHeight(null);
989 } catch (Exception e){
990 if (log.isLoggable(PlatformLogger.FINER)) {
991 log.finer("SunToolkit.getScaledIconImage: " +
992 "Perhaps the image passed into Java is broken. Skipping this icon.");
993 }
994 continue;
995 }
996 if (iw > 0 && ih > 0) {
997 //Calc scale factor
998 double scaleFactor = Math.min((double)width / (double)iw,
999 (double)height / (double)ih);
1000 //Calculate scaled image dimensions
1001 //adjusting scale factor to nearest "good" value
1002 int adjw = 0;
1003 int adjh = 0;
1004 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
1005 if (scaleFactor >= 2) {
1006 //Need to enlarge image more than twice
1007 //Round down scale factor to multiply by integer value
1008 scaleFactor = Math.floor(scaleFactor);
1009 adjw = iw * (int)scaleFactor;
1010 adjh = ih * (int)scaleFactor;
1011 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1012 } else if (scaleFactor >= 1) {
1013 //Don't scale
1014 scaleFactor = 1.0;
1015 adjw = iw;
1016 adjh = ih;
1017 scaleMeasure = 0;
1018 } else if (scaleFactor >= 0.75) {
1019 //Multiply by 3/4
1020 scaleFactor = 0.75;
1021 adjw = iw * 3 / 4;
1022 adjh = ih * 3 / 4;
1023 scaleMeasure = 0.3;
1024 } else if (scaleFactor >= 0.6666) {
1025 //Multiply by 2/3
1026 scaleFactor = 0.6666;
1027 adjw = iw * 2 / 3;
1028 adjh = ih * 2 / 3;
1029 scaleMeasure = 0.33;
1030 } else {
1031 //Multiply size by 1/scaleDivider
1032 //where scaleDivider is minimum possible integer
1033 //larger than 1/scaleFactor
1034 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1035 scaleFactor = 1.0 / scaleDivider;
1036 adjw = (int)Math.round((double)iw / scaleDivider);
1037 adjh = (int)Math.round((double)ih / scaleDivider);
1038 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1039 }
1040 double similarity = ((double)width - (double)adjw) / (double)width +
1041 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1042 scaleMeasure; //Large rescale is bad
1043 if (similarity < bestSimilarity) {
1044 bestSimilarity = similarity;
1045 bestScaleFactor = scaleFactor;
1046 bestImage = im;
1047 bestWidth = adjw;
1048 bestHeight = adjh;
1049 }
1050 if (similarity == 0) break;
1051 }
1052 }
1053 if (bestImage == null) {
1054 //No images were found, possibly all are broken
1055 return null;
1056 }
1057 BufferedImage bimage =
1058 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1059 Graphics2D g = bimage.createGraphics();
1060 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1061 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1062 try {
1063 int x = (width - bestWidth) / 2;
1064 int y = (height - bestHeight) / 2;
1065 if (log.isLoggable(PlatformLogger.FINER)) {
1066 log.finer("WWindowPeer.getScaledIconData() result : " +
1067 "w : " + width + " h : " + height +
1068 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) +
1069 " sim : " + bestSimilarity + " sf : " + bestScaleFactor +
1070 " adjW : " + bestWidth + " adjH : " + bestHeight +
1071 " x : " + x + " y : " + y);
1072 }
1073 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1074 } finally {
1075 g.dispose();
1076 }
1077 return bimage;
1078 }
1079
1080 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1081 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1082 if (bimage == null) {
1083 if (log.isLoggable(PlatformLogger.FINER)) {
1084 log.finer("SunToolkit.getScaledIconData: " +
1085 "Perhaps the image passed into Java is broken. Skipping this icon.");
1086 }
1087 return null;
1088 }
1089 Raster raster = bimage.getRaster();
1090 DataBuffer buffer = raster.getDataBuffer();
1091 return (DataBufferInt)buffer;
1092 }
1093
1094 protected EventQueue getSystemEventQueueImpl() {
1095 return getSystemEventQueueImplPP();
1096 }
1097
1098 // Package private implementation
1099 static EventQueue getSystemEventQueueImplPP() {
1100 return getSystemEventQueueImplPP(AppContext.getAppContext());
1101 }
1102
1103 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1104 EventQueue theEventQueue =
1105 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1106 return theEventQueue;
1107 }
1108
1109 /**
1110 * Give native peers the ability to query the native container
1111 * given a native component (eg the direct parent may be lightweight).
1112 */
1113 public static Container getNativeContainer(Component c) {
1114 return Toolkit.getNativeContainer(c);
1115 }
1116
1117 /**
1118 * Gives native peers the ability to query the closest HW component.
1119 * If the given component is heavyweight, then it returns this. Otherwise,
1120 * it goes one level up in the hierarchy and tests next component.
1121 */
1122 public static Component getHeavyweightComponent(Component c) {
1123 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1124 c = AWTAccessor.getComponentAccessor().getParent(c);
1125 }
1126 return c;
1127 }
1128
1129 /**
1130 * Returns a new input method window, with behavior as specified in
1131 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1132 * If the inputContext is not null, the window should return it from its
1133 * getInputContext() method. The window needs to implement
1134 * sun.awt.im.InputMethodWindow.
1135 * <p>
1136 * SunToolkit subclasses can override this method to return better input
1137 * method windows.
1138 */
1139 public Window createInputMethodWindow(String title, InputContext context) {
1140 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1141 }
1142
1143 /**
1144 * Returns whether enableInputMethods should be set to true for peered
1145 * TextComponent instances on this platform. False by default.
1146 */
1147 public boolean enableInputMethodsForTextComponent() {
1148 return false;
1149 }
1150
1151 private static Locale startupLocale = null;
1152
1153 /**
1154 * Returns the locale in which the runtime was started.
1155 */
1156 public static Locale getStartupLocale() {
1157 if (startupLocale == null) {
1158 String language, region, country, variant;
1159 language = (String) AccessController.doPrivileged(
1160 new GetPropertyAction("user.language", "en"));
1161 // for compatibility, check for old user.region property
1162 region = (String) AccessController.doPrivileged(
1163 new GetPropertyAction("user.region"));
1164 if (region != null) {
1165 // region can be of form country, country_variant, or _variant
1166 int i = region.indexOf('_');
1167 if (i >= 0) {
1168 country = region.substring(0, i);
1169 variant = region.substring(i + 1);
1170 } else {
1171 country = region;
1172 variant = "";
1173 }
1174 } else {
1175 country = (String) AccessController.doPrivileged(
1176 new GetPropertyAction("user.country", ""));
1177 variant = (String) AccessController.doPrivileged(
1178 new GetPropertyAction("user.variant", ""));
1179 }
1180 startupLocale = new Locale(language, country, variant);
1181 }
1182 return startupLocale;
1183 }
1184
1185 /**
1186 * Returns the default keyboard locale of the underlying operating system
1187 */
1188 public Locale getDefaultKeyboardLocale() {
1189 return getStartupLocale();
1190 }
1191
1192 private static String dataTransfererClassName = null;
1193
1194 protected static void setDataTransfererClassName(String className) {
1195 dataTransfererClassName = className;
1196 }
1197
1198 public static String getDataTransfererClassName() {
1199 if (dataTransfererClassName == null) {
1200 Toolkit.getDefaultToolkit(); // transferer set during toolkit init
1201 }
1202 return dataTransfererClassName;
1203 }
1204
1205 // Support for window closing event notifications
1206 private transient WindowClosingListener windowClosingListener = null;
1207 /**
1208 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1209 */
1210 public WindowClosingListener getWindowClosingListener() {
1211 return windowClosingListener;
1212 }
1213 /**
1214 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1215 */
1216 public void setWindowClosingListener(WindowClosingListener wcl) {
1217 windowClosingListener = wcl;
1218 }
1219
1220 /**
1221 * @see sun.awt.WindowClosingListener#windowClosingNotify
1222 */
1223 public RuntimeException windowClosingNotify(WindowEvent event) {
1224 if (windowClosingListener != null) {
1225 return windowClosingListener.windowClosingNotify(event);
1226 } else {
1227 return null;
1228 }
1229 }
1230 /**
1231 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1232 */
1233 public RuntimeException windowClosingDelivered(WindowEvent event) {
1234 if (windowClosingListener != null) {
1235 return windowClosingListener.windowClosingDelivered(event);
1236 } else {
1237 return null;
1238 }
1239 }
1240
1241 private static DefaultMouseInfoPeer mPeer = null;
1242
1243 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1244 if (mPeer == null) {
1245 mPeer = new DefaultMouseInfoPeer();
1246 }
1247 return mPeer;
1248 }
1249
1250
1251 /**
1252 * Returns whether default toolkit needs the support of the xembed
1253 * from embedding host(if any).
1254 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1255 */
1256 public static boolean needsXEmbed() {
1257 String noxembed = (String) AccessController.
1258 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1259 if ("true".equals(noxembed)) {
1260 return false;
1261 }
1262
1263 Toolkit tk = Toolkit.getDefaultToolkit();
1264 if (tk instanceof SunToolkit) {
1265 // SunToolkit descendants should override this method to specify
1266 // concrete behavior
1267 return ((SunToolkit)tk).needsXEmbedImpl();
1268 } else {
1269 // Non-SunToolkit doubtly might support XEmbed
1270 return false;
1271 }
1272 }
1273
1274 /**
1275 * Returns whether this toolkit needs the support of the xembed
1276 * from embedding host(if any).
1277 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1278 */
1279 protected boolean needsXEmbedImpl() {
1280 return false;
1281 }
1282
1283 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1284
1285 /**
1286 * Returns whether the XEmbed server feature is requested by
1287 * developer. If true, Toolkit should return an
1288 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1289 */
1290 protected final boolean isXEmbedServerRequested() {
1291 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1292 }
1293
1294 /**
1295 * Returns whether the modal exclusion API is supported by the current toolkit.
1296 * When it isn't supported, calling <code>setModalExcluded</code> has no
1297 * effect, and <code>isModalExcluded</code> returns false for all windows.
1298 *
1299 * @return true if modal exclusion is supported by the toolkit, false otherwise
1300 *
1301 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1302 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1303 *
1304 * @since 1.5
1305 */
1306 public static boolean isModalExcludedSupported()
1307 {
1308 Toolkit tk = Toolkit.getDefaultToolkit();
1309 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1310 }
1311 /*
1312 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1313 *
1314 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1315 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1316 *
1317 * @since 1.5
1318 */
1319 protected boolean isModalExcludedSupportedImpl()
1320 {
1321 return false;
1322 }
1323
1324 /*
1325 * Sets this window to be excluded from being modally blocked. When the
1326 * toolkit supports modal exclusion and this method is called, input
1327 * events, focus transfer and z-order will continue to work for the
1328 * window, it's owned windows and child components, even in the
1329 * presence of a modal dialog.
1330 * For details on which <code>Window</code>s are normally blocked
1331 * by modal dialog, see {@link java.awt.Dialog}.
1332 * Invoking this method when the modal exclusion API is not supported by
1333 * the current toolkit has no effect.
1334 * @param window Window to be marked as not modally blocked
1335 * @see java.awt.Dialog
1336 * @see java.awt.Dialog#setModal(boolean)
1337 * @see sun.awt.SunToolkit#isModalExcludedSupported
1338 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1339 */
1340 public static void setModalExcluded(Window window)
1341 {
1342 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1343 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1344 }
1345 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1346 }
1347
1348 /*
1349 * Returns whether the specified window is blocked by modal dialogs.
1350 * If the modal exclusion API isn't supported by the current toolkit,
1351 * it returns false for all windows.
1352 *
1353 * @param window Window to test for modal exclusion
1354 *
1355 * @return true if the window is modal excluded, false otherwise. If
1356 * the modal exclusion isn't supported by the current Toolkit, false
1357 * is returned
1358 *
1359 * @see sun.awt.SunToolkit#isModalExcludedSupported
1360 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1361 *
1362 * @since 1.5
1363 */
1364 public static boolean isModalExcluded(Window window)
1365 {
1366 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1367 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1368 }
1369 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1370 }
1371
1372 /**
1373 * Overridden in XToolkit and WToolkit
1374 */
1375 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1376 return (modalityType == Dialog.ModalityType.MODELESS) ||
1377 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1378 }
1379
1380 /**
1381 * Overridden in XToolkit and WToolkit
1382 */
1383 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1384 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1385 }
1386
1387 ///////////////////////////////////////////////////////////////////////////
1388 //
1389 // The following is used by the Java Plug-in to coordinate dialog modality
1390 // between containing applications (browsers, ActiveX containers etc) and
1391 // the AWT.
1392 //
1393 ///////////////////////////////////////////////////////////////////////////
1394
1395 private ModalityListenerList modalityListeners = new ModalityListenerList();
1396
1397 public void addModalityListener(ModalityListener listener) {
1398 modalityListeners.add(listener);
1399 }
1400
1401 public void removeModalityListener(ModalityListener listener) {
1402 modalityListeners.remove(listener);
1403 }
1404
1405 public void notifyModalityPushed(Dialog dialog) {
1406 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1407 }
1408
1409 public void notifyModalityPopped(Dialog dialog) {
1410 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1411 }
1412
1413 final void notifyModalityChange(int id, Dialog source) {
1414 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1415 ev.dispatch();
1416 }
1417
1418 static class ModalityListenerList implements ModalityListener {
1419
1420 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1421
1422 void add(ModalityListener listener) {
1423 listeners.addElement(listener);
1424 }
1425
1426 void remove(ModalityListener listener) {
1427 listeners.removeElement(listener);
1428 }
1429
1430 public void modalityPushed(ModalityEvent ev) {
1431 Iterator<ModalityListener> it = listeners.iterator();
1432 while (it.hasNext()) {
1433 it.next().modalityPushed(ev);
1434 }
1435 }
1436
1437 public void modalityPopped(ModalityEvent ev) {
1438 Iterator<ModalityListener> it = listeners.iterator();
1439 while (it.hasNext()) {
1440 it.next().modalityPopped(ev);
1441 }
1442 }
1443 } // end of class ModalityListenerList
1444
1445 ///////////////////////////////////////////////////////////////////////////
1446 // End Plug-in code
1447 ///////////////////////////////////////////////////////////////////////////
1448
1449 public static boolean isLightweightOrUnknown(Component comp) {
1450 if (comp.isLightweight()
1451 || !(getDefaultToolkit() instanceof SunToolkit))
1452 {
1453 return true;
1454 }
1455 return !(comp instanceof Button
1456 || comp instanceof Canvas
1457 || comp instanceof Checkbox
1458 || comp instanceof Choice
1459 || comp instanceof Label
1460 || comp instanceof java.awt.List
1461 || comp instanceof Panel
1462 || comp instanceof Scrollbar
1463 || comp instanceof ScrollPane
1464 || comp instanceof TextArea
1465 || comp instanceof TextField
1466 || comp instanceof Window);
1467 }
1468
1469 public static Method getMethod(final Class clz, final String methodName, final Class[] params) {
1470 Method res = null;
1471 try {
1472 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() {
1473 public Method run() throws Exception {
1474 Method m = clz.getDeclaredMethod(methodName, params);
1475 m.setAccessible(true);
1476 return m;
1477 }
1478 });
1479 } catch (PrivilegedActionException ex) {
1480 ex.printStackTrace();
1481 }
1482 return res;
1483 }
1484
1485 public static class OperationTimedOut extends RuntimeException {
1486 public OperationTimedOut(String msg) {
1487 super(msg);
1488 }
1489 public OperationTimedOut() {
1490 }
1491 }
1492 public static class InfiniteLoop extends RuntimeException {
1493 }
1494
1495 public static class IllegalThreadException extends RuntimeException {
1496 public IllegalThreadException(String msg) {
1497 super(msg);
1498 }
1499 public IllegalThreadException() {
1500 }
1501 }
1502
1503 public static final int DEFAULT_WAIT_TIME = 10000;
1504 private static final int MAX_ITERS = 20;
1505 private static final int MIN_ITERS = 0;
1506 private static final int MINIMAL_EDELAY = 0;
1507
1508 /**
1509 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1510 */
1511 public void realSync() throws OperationTimedOut, InfiniteLoop {
1512 realSync(DEFAULT_WAIT_TIME);
1513 }
1514
1515 /**
1516 * Forces toolkit to synchronize with the native windowing
1517 * sub-system, flushing all pending work and waiting for all the
1518 * events to be processed. This method guarantees that after
1519 * return no additional Java events will be generated, unless
1520 * cause by user. Obviously, the method cannot be used on the
1521 * event dispatch thread (EDT). In case it nevertheless gets
1522 * invoked on this thread, the method throws the
1523 * IllegalThreadException runtime exception.
1524 *
1525 * <p> This method allows to write tests without explicit timeouts
1526 * or wait for some event. Example:
1527 * <code>
1528 * Frame f = ...;
1529 * f.setVisible(true);
1530 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1531 * </code>
1532 *
1533 * <p> After realSync, <code>f</code> will be completely visible
1534 * on the screen, its getLocationOnScreen will be returning the
1535 * right result and it will be the focus owner.
1536 *
1537 * <p> Another example:
1538 * <code>
1539 * b.requestFocus();
1540 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1541 * </code>
1542 *
1543 * <p> After realSync, <code>b</code> will be focus owner.
1544 *
1545 * <p> Notice that realSync isn't guaranteed to work if recurring
1546 * actions occur, such as if during processing of some event
1547 * another request which may generate some events occurs. By
1548 * default, sync tries to perform as much as {@value MAX_ITERS}
1549 * cycles of event processing, allowing for roughly {@value
1550 * MAX_ITERS} additional requests.
1551 *
1552 * <p> For example, requestFocus() generates native request, which
1553 * generates one or two Java focus events, which then generate a
1554 * serie of paint events, a serie of Java focus events, which then
1555 * generate a serie of paint events which then are processed -
1556 * three cycles, minimum.
1557 *
1558 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1559 */
1560 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1561 {
1562 if (EventQueue.isDispatchThread()) {
1563 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1564 }
1565 int bigLoop = 0;
1566 do {
1567 // Let's do sync first
1568 sync();
1569
1570 // During the wait process, when we were processing incoming
1571 // events, we could have made some new request, which can
1572 // generate new events. Example: MapNotify/XSetInputFocus.
1573 // Therefore, we dispatch them as long as there is something
1574 // to dispatch.
1575 int iters = 0;
1576 while (iters < MIN_ITERS) {
1577 syncNativeQueue(timeout);
1578 iters++;
1579 }
1580 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1581 iters++;
1582 }
1583 if (iters >= MAX_ITERS) {
1584 throw new InfiniteLoop();
1585 }
1586
1587 // native requests were dispatched by X/Window Manager or Windows
1588 // Moreover, we processed them all on Toolkit thread
1589 // Now wait while EDT processes them.
1590 //
1591 // During processing of some events (focus, for example),
1592 // some other events could have been generated. So, after
1593 // waitForIdle, we may end up with full EventQueue
1594 iters = 0;
1595 while (iters < MIN_ITERS) {
1596 waitForIdle(timeout);
1597 iters++;
1598 }
1599 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1600 iters++;
1601 }
1602 if (iters >= MAX_ITERS) {
1603 throw new InfiniteLoop();
1604 }
1605
1606 bigLoop++;
1607 // Again, for Java events, it was simple to check for new Java
1608 // events by checking event queue, but what if Java events
1609 // resulted in native requests? Therefor, check native events again.
1610 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1611 }
1612
1613 /**
1614 * Platform toolkits need to implement this method to perform the
1615 * sync of the native queue. The method should wait until native
1616 * requests are processed, all native events are processed and
1617 * corresponding Java events are generated. Should return
1618 * <code>true</code> if some events were processed,
1619 * <code>false</code> otherwise.
1620 */
1621 protected abstract boolean syncNativeQueue(final long timeout);
1622
1623 private boolean eventDispatched = false;
1624 private boolean queueEmpty = false;
1625 private final Object waitLock = "Wait Lock";
1626
1627 static Method eqNoEvents;
1628
1629 private boolean isEQEmpty() {
1630 EventQueue queue = getSystemEventQueueImpl();
1631 synchronized(SunToolkit.class) {
1632 if (eqNoEvents == null) {
1633 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null);
1634 }
1635 }
1636 try {
1637 return (Boolean)eqNoEvents.invoke(queue);
1638 } catch (Exception e) {
1639 e.printStackTrace();
1640 return false;
1641 }
1642 }
1643
1644 /**
1645 * Waits for the Java event queue to empty. Ensures that all
1646 * events are processed (including paint events), and that if
1647 * recursive events were generated, they are also processed.
1648 * Should return <code>true</code> if more processing is
1649 * necessary, <code>false</code> otherwise.
1650 */
1651 protected final boolean waitForIdle(final long timeout) {
1652 flushPendingEvents();
1653 boolean queueWasEmpty = isEQEmpty();
1654 queueEmpty = false;
1655 eventDispatched = false;
1656 synchronized(waitLock) {
1657 postEvent(AppContext.getAppContext(),
1658 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1659 public void dispatch() {
1660 // Here we block EDT. It could have some
1661 // events, it should have dispatched them by
1662 // now. So native requests could have been
1663 // generated. First, dispatch them. Then,
1664 // flush Java events again.
1665 int iters = 0;
1666 while (iters < MIN_ITERS) {
1667 syncNativeQueue(timeout);
1668 iters++;
1669 }
1670 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1671 iters++;
1672 }
1673 flushPendingEvents();
1674
1675 synchronized(waitLock) {
1676 queueEmpty = isEQEmpty();
1677 eventDispatched = true;
1678 waitLock.notifyAll();
1679 }
1680 }
1681 });
1682 try {
1683 while (!eventDispatched) {
1684 waitLock.wait();
1685 }
1686 } catch (InterruptedException ie) {
1687 return false;
1688 }
1689 }
1690
1691 try {
1692 Thread.sleep(MINIMAL_EDELAY);
1693 } catch (InterruptedException ie) {
1694 throw new RuntimeException("Interrupted");
1695 }
1696
1697 flushPendingEvents();
1698
1699 // Lock to force write-cache flush for queueEmpty.
1700 synchronized (waitLock) {
1701 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1702 }
1703 }
1704
1705 /**
1706 * Grabs the mouse input for the given window. The window must be
1707 * visible. The window or its children do not receive any
1708 * additional mouse events besides those targeted to them. All
1709 * other events will be dispatched as before - to the respective
1710 * targets. This Window will receive UngrabEvent when automatic
1711 * ungrab is about to happen. The event can be listened to by
1712 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1713 * UngrabEvent class for the list of conditions when ungrab is
1714 * about to happen.
1715 * @see UngrabEvent
1716 */
1717 public abstract void grab(Window w);
1718
1719 /**
1720 * Forces ungrab. No event will be sent.
1721 */
1722 public abstract void ungrab(Window w);
1723
1724
1725 /**
1726 * Locates the splash screen library in a platform dependent way and closes
1727 * the splash screen. Should be invoked on first top-level frame display.
1728 * @see java.awt.SplashScreen
1729 * @since 1.6
1730 */
1731 public static native void closeSplashScreen();
1732
1733 /* The following methods and variables are to support retrieving
1734 * desktop text anti-aliasing settings
1735 */
1736
1737 /* Need an instance method because setDesktopProperty(..) is protected. */
1738 private void fireDesktopFontPropertyChanges() {
1739 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1740 SunToolkit.getDesktopFontHints());
1741 }
1742
1743 private static boolean checkedSystemAAFontSettings;
1744 private static boolean useSystemAAFontSettings;
1745 private static boolean lastExtraCondition = true;
1746 private static RenderingHints desktopFontHints;
1747
1748 /* Since Swing is the reason for this "extra condition" logic its
1749 * worth documenting it in some detail.
1750 * First, a goal is for Swing and applications to both retrieve and
1751 * use the same desktop property value so that there is complete
1752 * consistency between the settings used by JDK's Swing implementation
1753 * and 3rd party custom Swing components, custom L&Fs and any general
1754 * text rendering that wants to be consistent with these.
1755 * But by default on Solaris & Linux Swing will not use AA text over
1756 * remote X11 display (unless Xrender can be used which is TBD and may not
1757 * always be available anyway) as that is a noticeable performance hit.
1758 * So there needs to be a way to express that extra condition so that
1759 * it is seen by all clients of the desktop property API.
1760 * If this were the only condition it could be handled here as it would
1761 * be the same for any L&F and could reasonably be considered to be
1762 * a static behaviour of those systems.
1763 * But GTK currently has an additional test based on locale which is
1764 * not applied by Metal. So mixing GTK in a few locales with Metal
1765 * would mean the last one wins.
1766 * This could be stored per-app context which would work
1767 * for different applets, but wouldn't help for a single application
1768 * using GTK and some other L&F concurrently.
1769 * But it is expected this will be addressed within GTK and the font
1770 * system so is a temporary and somewhat unlikely harmless corner case.
1771 */
1772 public static void setAAFontSettingsCondition(boolean extraCondition) {
1773 if (extraCondition != lastExtraCondition) {
1774 lastExtraCondition = extraCondition;
1775 if (checkedSystemAAFontSettings) {
1776 /* Someone already asked for this info, under a different
1777 * condition.
1778 * We'll force re-evaluation instead of replicating the
1779 * logic, then notify any listeners of any change.
1780 */
1781 checkedSystemAAFontSettings = false;
1782 Toolkit tk = Toolkit.getDefaultToolkit();
1783 if (tk instanceof SunToolkit) {
1784 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1785 }
1786 }
1787 }
1788 }
1789
1790 /* "false", "off", ""default" aren't explicitly tested, they
1791 * just fall through to produce a null return which all are equated to
1792 * "false".
1793 */
1794 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1795 Object aaHint = null;
1796 hintname = hintname.toLowerCase(Locale.ENGLISH);
1797 if (hintname.equals("on")) {
1798 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1799 } else if (hintname.equals("gasp")) {
1800 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1801 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1802 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1803 } else if (hintname.equals("lcd_hbgr")) {
1804 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1805 } else if (hintname.equals("lcd_vrgb")) {
1806 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1807 } else if (hintname.equals("lcd_vbgr")) {
1808 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1809 }
1810 if (aaHint != null) {
1811 RenderingHints map = new RenderingHints(null);
1812 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1813 return map;
1814 } else {
1815 return null;
1816 }
1817 }
1818
1819 /* This method determines whether to use the system font settings,
1820 * or ignore them if a L&F has specified they should be ignored, or
1821 * to override both of these with a system property specified value.
1822 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1823 * system property isn't applied as desktop properties are considered
1824 * to be inapplicable in that case. In that headless case although
1825 * this method will return "true" the toolkit will return a null map.
1826 */
1827 private static boolean useSystemAAFontSettings() {
1828 if (!checkedSystemAAFontSettings) {
1829 useSystemAAFontSettings = true; /* initially set this true */
1830 String systemAAFonts = null;
1831 Toolkit tk = Toolkit.getDefaultToolkit();
1832 if (tk instanceof SunToolkit) {
1833 systemAAFonts =
1834 (String)AccessController.doPrivileged(
1835 new GetPropertyAction("awt.useSystemAAFontSettings"));
1836 }
1837 if (systemAAFonts != null) {
1838 useSystemAAFontSettings =
1839 Boolean.valueOf(systemAAFonts).booleanValue();
1840 /* If it is anything other than "true", then it may be
1841 * a hint name , or it may be "off, "default", etc.
1842 */
1843 if (!useSystemAAFontSettings) {
1844 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1845 }
1846 }
1847 /* If its still true, apply the extra condition */
1848 if (useSystemAAFontSettings) {
1849 useSystemAAFontSettings = lastExtraCondition;
1850 }
1851 checkedSystemAAFontSettings = true;
1852 }
1853 return useSystemAAFontSettings;
1854 }
1855
1856 /* A variable defined for the convenience of JDK code */
1857 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1858
1859 /* Overridden by subclasses to return platform/desktop specific values */
1860 protected RenderingHints getDesktopAAHints() {
1861 return null;
1862 }
1863
1864 /* Subclass desktop property loading methods call this which
1865 * in turn calls the appropriate subclass implementation of
1866 * getDesktopAAHints() when system settings are being used.
1867 * Its public rather than protected because subclasses may delegate
1868 * to a helper class.
1869 */
1870 public static RenderingHints getDesktopFontHints() {
1871 if (useSystemAAFontSettings()) {
1872 Toolkit tk = Toolkit.getDefaultToolkit();
1873 if (tk instanceof SunToolkit) {
1874 Object map = ((SunToolkit)tk).getDesktopAAHints();
1875 return (RenderingHints)map;
1876 } else { /* Headless Toolkit */
1877 return null;
1878 }
1879 } else if (desktopFontHints != null) {
1880 /* cloning not necessary as the return value is cloned later, but
1881 * its harmless.
1882 */
1883 return (RenderingHints)(desktopFontHints.clone());
1884 } else {
1885 return null;
1886 }
1887 }
1888
1889
1890 public abstract boolean isDesktopSupported();
1891
1892 /*
1893 * consumeNextKeyTyped() method is not currently used,
1894 * however Swing could use it in the future.
1895 */
1896 private static Method consumeNextKeyTypedMethod = null;
1897 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1898 if (consumeNextKeyTypedMethod == null) {
1899 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class,
1900 "consumeNextKeyTyped",
1901 new Class[] {KeyEvent.class});
1902 }
1903 try {
1904 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(),
1905 keyEvent);
1906 } catch (IllegalAccessException iae) {
1907 iae.printStackTrace();
1908 } catch (InvocationTargetException ite) {
1909 ite.printStackTrace();
1910 }
1911 }
1912
1913 protected static void dumpPeers(final PlatformLogger aLog) {
1914 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1915 }
1916
1917 /**
1918 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1919 * @return Window ancestor of the component or component by itself if it is Window;
1920 * null, if component is not a part of window hierarchy
1921 */
1922 public static Window getContainingWindow(Component comp) {
1923 while (comp != null && !(comp instanceof Window)) {
1924 comp = comp.getParent();
1925 }
1926 return (Window)comp;
1927 }
1928
1929 /**
1930 * Returns the value of the system property indicated by the specified key.
1931 */
1932 public static String getSystemProperty(final String key) {
1933 return (String)AccessController.doPrivileged(new PrivilegedAction() {
1934 public Object run() {
1935 return System.getProperty(key);
1936 }
1937 });
1938 }
1939
1940 /**
1941 * Returns the boolean value of the system property indicated by the specified key.
1942 */
1943 protected static Boolean getBooleanSystemProperty(String key) {
1944 return Boolean.valueOf(AccessController.
1945 doPrivileged(new GetBooleanAction(key)));
1946 }
1947
1948 private static Boolean sunAwtDisableMixing = null;
1949
1950 /**
1951 * Returns the value of "sun.awt.disableMixing" property. Default
1952 * value is {@code false}.
1953 */
1954 public synchronized static boolean getSunAwtDisableMixing() {
1955 if (sunAwtDisableMixing == null) {
1956 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing");
1957 }
1958 return sunAwtDisableMixing.booleanValue();
1959 }
1960
1961 /**
1962 * Returns true if the native GTK libraries are available. The
1963 * default implementation returns false, but UNIXToolkit overrides this
1964 * method to provide a more specific answer.
1965 */
1966 public boolean isNativeGTKAvailable() {
1967 return false;
1968 }
1969
1970 // Cosntant alpha
1971 public boolean isWindowOpacitySupported() {
1972 return false;
1973 }
1974
1975 // Shaping
1976 public boolean isWindowShapingSupported() {
1977 return false;
1978 }
1979
1980 // Per-pixel alpha
1981 public boolean isWindowTranslucencySupported() {
1982 return false;
1983 }
1984
1985 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1986 return false;
1987 }
1988
1989 /**
1990 * Returns whether or not a containing top level window for the passed
1991 * component is
1992 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1993 *
1994 * @param c a Component which toplevel's to check
1995 * @return {@code true} if the passed component is not null and has a
1996 * containing toplevel window which is opaque (so per-pixel translucency
1997 * is not enabled), {@code false} otherwise
1998 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1999 */
2000 public static boolean isContainingTopLevelOpaque(Component c) {
2001 Window w = getContainingWindow(c);
2002 return w != null && w.isOpaque();
2003 }
2004
2005 /**
2006 * Returns whether or not a containing top level window for the passed
2007 * component is
2008 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2009 *
2010 * @param c a Component which toplevel's to check
2011 * @return {@code true} if the passed component is not null and has a
2012 * containing toplevel window which has opacity less than
2013 * 1.0f (which means that it is translucent), {@code false} otherwise
2014 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2015 */
2016 public static boolean isContainingTopLevelTranslucent(Component c) {
2017 Window w = getContainingWindow(c);
2018 return w != null && ((Window)w).getOpacity() < 1.0f;
2019 }
2020
2021 /**
2022 * Returns whether the native system requires using the peer.updateWindow()
2023 * method to update the contents of a non-opaque window, or if usual
2024 * painting procedures are sufficient. The default return value covers
2025 * the X11 systems. On MS Windows this method is overriden in WToolkit
2026 * to return true.
2027 */
2028 public boolean needUpdateWindow() {
2029 return false;
2030 }
2031
2032 /**
2033 * Descendants of the SunToolkit should override and put their own logic here.
2034 */
2035 public int getNumberOfButtons(){
2036 return 3;
2037 }
2038
2039 /**
2040 * Checks that the given object implements/extends the given
2041 * interface/class.
2042 *
2043 * Note that using the instanceof operator causes a class to be loaded.
2044 * Using this method doesn't load a class and it can be used instead of
2045 * the instanceof operator for performance reasons.
2046 *
2047 * @param obj Object to be checked
2048 * @param type The name of the interface/class. Must be
2049 * fully-qualified interface/class name.
2050 * @return true, if this object implements/extends the given
2051 * interface/class, false, otherwise, or if obj or type is null
2052 */
2053 public static boolean isInstanceOf(Object obj, String type) {
2054 if (obj == null) return false;
2055 if (type == null) return false;
2056
2057 return isInstanceOf(obj.getClass(), type);
2058 }
2059
2060 private static boolean isInstanceOf(Class cls, String type) {
2061 if (cls == null) return false;
2062
2063 if (cls.getName().equals(type)) {
2064 return true;
2065 }
2066
2067 for (Class c : cls.getInterfaces()) {
2068 if (c.getName().equals(type)) {
2069 return true;
2070 }
2071 }
2072 return isInstanceOf(cls.getSuperclass(), type);
2073 }
2074
2075 ///////////////////////////////////////////////////////////////////////////
2076 //
2077 // The following methods help set and identify whether a particular
2078 // AWTEvent object was produced by the system or by user code. As of this
2079 // writing the only consumer is the Java Plug-In, although this information
2080 // could be useful to more clients and probably should be formalized in
2081 // the public API.
2082 //
2083 ///////////////////////////////////////////////////////////////////////////
2084
2085 public static void setSystemGenerated(AWTEvent e) {
2086 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2087 }
2088
2089 public static boolean isSystemGenerated(AWTEvent e) {
2090 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2091 }
2092
2093 } // class SunToolkit
2094
2095
2096 /*
2097 * PostEventQueue is a Thread that runs in the same AppContext as the
2098 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2099 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2100 * events to this queue, which then calls EventQueue.postEvent().
2101 *
2102 * We do this because EventQueue.postEvent() may be overridden by client
2103 * code, and we mustn't ever call client code from the toolkit thread.
2104 */
2105 class PostEventQueue {
2106 private EventQueueItem queueHead = null;
2107 private EventQueueItem queueTail = null;
2108 private final EventQueue eventQueue;
2109
2110 PostEventQueue(EventQueue eq) {
2111 eventQueue = eq;
2112 }
2113
2114 public synchronized boolean noEvents() {
2115 return queueHead == null;
2116 }
2117
2118 /*
2119 * Continually post pending AWTEvents to the Java EventQueue. The method
2120 * is synchronized to ensure the flush is completed before a new event
2121 * can be posted to this queue.
2122 */
2123 public synchronized void flush() {
2124 EventQueueItem tempQueue = queueHead;
2125 queueHead = queueTail = null;
2126 while (tempQueue != null) {
2127 eventQueue.postEvent(tempQueue.event);
2128 tempQueue = tempQueue.next;
2129 }
2130 }
2131
2132 /*
2133 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2134 */
2135 void postEvent(AWTEvent event) {
2136 EventQueueItem item = new EventQueueItem(event);
2137
2138 synchronized (this) {
2139 if (queueHead == null) {
2140 queueHead = queueTail = item;
2141 } else {
2142 queueTail.next = item;
2143 queueTail = item;
2144 }
2145 }
2146 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2147 }
2148 } // class PostEventQueue