1 /*
2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package sun.awt;
27
28 import java.awt.*;
29 import static java.awt.RenderingHints.*;
30 import java.awt.dnd.*;
31 import java.awt.dnd.peer.DragSourceContextPeer;
32 import java.awt.peer.*;
33 import java.awt.event.WindowEvent;
34 import java.awt.event.KeyEvent;
35 import java.awt.image.*;
36 import java.awt.TrayIcon;
37 import java.awt.SystemTray;
38 import java.awt.event.InputEvent;
39 import java.io.File;
40 import java.io.IOException;
41 import java.io.InputStream;
42 import java.net.URL;
43 import java.util.*;
44 import java.util.concurrent.TimeUnit;
45 import java.util.concurrent.locks.Condition;
46 import java.util.concurrent.locks.Lock;
47 import java.util.concurrent.locks.ReentrantLock;
48
49 import sun.awt.datatransfer.DataTransferer;
50 import sun.util.logging.PlatformLogger;
51 import sun.misc.SoftCache;
52 import sun.font.FontDesignMetrics;
53 import sun.awt.im.InputContext;
54 import sun.awt.image.*;
55 import sun.security.action.GetPropertyAction;
56 import sun.security.action.GetBooleanAction;
57 import java.lang.reflect.InvocationTargetException;
58 import java.security.AccessController;
59
60 public abstract class SunToolkit extends Toolkit
61 implements WindowClosingSupport, WindowClosingListener,
62 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
63
64 // 8014718: logging has been removed from 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 /* The key to put()/get() the PostEventQueue into/from the AppContext.
81 */
82 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
83
84 /**
85 * Number of buttons.
86 * By default it's taken from the system. If system value does not
87 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
88 */
89 protected static int numberOfButtons = 0;
90
91
92 /* XFree standard mention 24 buttons as maximum:
93 * http://www.xfree86.org/current/mouse.4.html
94 * We workaround systems supporting more than 24 buttons.
95 * Otherwise, we have to use long type values as masks
96 * which leads to API change.
97 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
98 * the 4-bytes limit for the int type. (CR 6799099)
99 * One more bit is reserved for FIRST_HIGH_BIT.
100 */
101 public final static int MAX_BUTTONS_SUPPORTED = 20;
102
103 /**
104 * Creates and initializes EventQueue instance for the specified
105 * AppContext.
106 * Note that event queue must be created from createNewAppContext()
107 * only in order to ensure that EventQueue constructor obtains
108 * the correct AppContext.
109 * @param appContext AppContext to associate with the event queue
110 */
111 private static void initEQ(AppContext appContext) {
112 EventQueue eventQueue;
113
114 String eqName = System.getProperty("AWT.EventQueueClass",
115 "java.awt.EventQueue");
116
117 try {
118 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
119 } catch (Exception e) {
120 e.printStackTrace();
121 System.err.println("Failed loading " + eqName + ": " + e);
122 eventQueue = new EventQueue();
123 }
124 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
125
126 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
127 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
128 }
129
130 public SunToolkit() {
131 }
132
133 public boolean useBufferPerWindow() {
134 return false;
135 }
136
137 public abstract WindowPeer createWindow(Window target)
138 throws HeadlessException;
139
140 public abstract FramePeer createFrame(Frame target)
141 throws HeadlessException;
142
143 public abstract FramePeer createLightweightFrame(LightweightFrame target)
144 throws HeadlessException;
145
146 public abstract DialogPeer createDialog(Dialog target)
147 throws HeadlessException;
148
149 public abstract ButtonPeer createButton(Button target)
150 throws HeadlessException;
151
152 public abstract TextFieldPeer createTextField(TextField target)
153 throws HeadlessException;
154
155 public abstract ChoicePeer createChoice(Choice target)
156 throws HeadlessException;
157
158 public abstract LabelPeer createLabel(Label target)
159 throws HeadlessException;
160
161 public abstract ListPeer createList(java.awt.List target)
162 throws HeadlessException;
163
164 public abstract CheckboxPeer createCheckbox(Checkbox target)
165 throws HeadlessException;
166
167 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
168 throws HeadlessException;
169
170 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
171 throws HeadlessException;
172
173 public abstract TextAreaPeer createTextArea(TextArea target)
174 throws HeadlessException;
175
176 public abstract FileDialogPeer createFileDialog(FileDialog target)
177 throws HeadlessException;
178
179 public abstract MenuBarPeer createMenuBar(MenuBar target)
180 throws HeadlessException;
181
182 public abstract MenuPeer createMenu(Menu target)
183 throws HeadlessException;
184
185 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
186 throws HeadlessException;
187
188 public abstract MenuItemPeer createMenuItem(MenuItem target)
189 throws HeadlessException;
190
191 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
192 CheckboxMenuItem target)
193 throws HeadlessException;
194
195 public abstract DragSourceContextPeer createDragSourceContextPeer(
196 DragGestureEvent dge)
197 throws InvalidDnDOperationException;
198
199 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
200 throws HeadlessException, AWTException;
201
202 public abstract SystemTrayPeer createSystemTray(SystemTray target);
203
204 public abstract boolean isTraySupported();
205
206 public abstract DataTransferer getDataTransferer();
207
208 @SuppressWarnings("deprecation")
209 public abstract FontPeer getFontPeer(String name, int style);
210
211 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
212 throws AWTException;
213
214 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
215 throws HeadlessException;
216
217 /**
218 * The AWT lock is typically only used on Unix platforms to synchronize
219 * access to Xlib, OpenGL, etc. However, these methods are implemented
220 * in SunToolkit so that they can be called from shared code (e.g.
221 * from the OGL pipeline) or from the X11 pipeline regardless of whether
222 * XToolkit or MToolkit is currently in use. There are native macros
223 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
224 * methods is changed, make sure it is compatible with the native macros.
225 *
226 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
227 * used in place of:
228 * synchronized (getAWTLock()) {
229 * ...
230 * }
231 *
232 * By factoring these methods out specially, we are able to change the
233 * implementation of these methods (e.g. use more advanced locking
234 * mechanisms) without impacting calling code.
235 *
236 * Sample usage:
237 * private void doStuffWithXlib() {
238 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
239 * SunToolkit.awtLock();
240 * try {
241 * ...
242 * XlibWrapper.XDoStuff();
243 * } finally {
244 * SunToolkit.awtUnlock();
245 * }
246 * }
247 */
248
249 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
250 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
251
252 public static final void awtLock() {
253 AWT_LOCK.lock();
254 }
255
256 public static final boolean awtTryLock() {
257 return AWT_LOCK.tryLock();
258 }
259
260 public static final void awtUnlock() {
261 AWT_LOCK.unlock();
262 }
263
264 public static final void awtLockWait()
265 throws InterruptedException
266 {
267 AWT_LOCK_COND.await();
268 }
269
270 public static final void awtLockWait(long timeout)
271 throws InterruptedException
272 {
273 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
274 }
275
276 public static final void awtLockNotify() {
277 AWT_LOCK_COND.signal();
278 }
279
280 public static final void awtLockNotifyAll() {
281 AWT_LOCK_COND.signalAll();
282 }
283
284 public static final boolean isAWTLockHeldByCurrentThread() {
285 return AWT_LOCK.isHeldByCurrentThread();
286 }
287
288 /*
289 * Create a new AppContext, along with its EventQueue, for a
290 * new ThreadGroup. Browser code, for example, would use this
291 * method to create an AppContext & EventQueue for an Applet.
292 */
293 public static AppContext createNewAppContext() {
294 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
295 return createNewAppContext(threadGroup);
296 }
297
298 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
299 // Create appContext before initialization of EventQueue, so all
300 // the calls to AppContext.getAppContext() from EventQueue ctor
301 // return correct values
302 AppContext appContext = new AppContext(threadGroup);
303 initEQ(appContext);
304
305 return appContext;
306 }
307
308 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
309 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
310 }
311
312 /*
313 * Fetch the peer associated with the given target (as specified
314 * in the peer creation method). This can be used to determine
315 * things like what the parent peer is. If the target is null
316 * or the target can't be found (either because the a peer was
317 * never created for it or the peer was disposed), a null will
318 * be returned.
319 */
320 protected static Object targetToPeer(Object target) {
321 if (target != null && !GraphicsEnvironment.isHeadless()) {
322 return AWTAutoShutdown.getInstance().getPeer(target);
323 }
324 return null;
325 }
326
327 protected static void targetCreatedPeer(Object target, Object peer) {
328 if (target != null && peer != null &&
329 !GraphicsEnvironment.isHeadless())
330 {
331 AWTAutoShutdown.getInstance().registerPeer(target, peer);
332 }
333 }
334
335 protected static void targetDisposedPeer(Object target, Object peer) {
336 if (target != null && peer != null &&
337 !GraphicsEnvironment.isHeadless())
338 {
339 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
340 }
341 }
342
343 // Maps from non-Component/MenuComponent to AppContext.
344 // WeakHashMap<Component,AppContext>
345 private static final Map<Object, AppContext> appContextMap =
346 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
347
348 /**
349 * Sets the appContext field of target. If target is not a Component or
350 * MenuComponent, this returns false.
351 */
352 private static boolean setAppContext(Object target,
353 AppContext context) {
354 if (target instanceof Component) {
355 AWTAccessor.getComponentAccessor().
356 setAppContext((Component)target, context);
357 } else if (target instanceof MenuComponent) {
358 AWTAccessor.getMenuComponentAccessor().
359 setAppContext((MenuComponent)target, context);
360 } else {
361 return false;
362 }
363 return true;
364 }
365
366 /**
367 * Returns the appContext field for target. If target is not a
368 * Component or MenuComponent this returns null.
369 */
370 private static AppContext getAppContext(Object target) {
371 if (target instanceof Component) {
372 return AWTAccessor.getComponentAccessor().
373 getAppContext((Component)target);
374 } else if (target instanceof MenuComponent) {
375 return AWTAccessor.getMenuComponentAccessor().
376 getAppContext((MenuComponent)target);
377 } else {
378 return null;
379 }
380 }
381
382 /*
383 * Fetch the AppContext associated with the given target.
384 * This can be used to determine things like which EventQueue
385 * to use for posting events to a Component. If the target is
386 * null or the target can't be found, a null with be returned.
387 */
388 public static AppContext targetToAppContext(Object target) {
389 if (target == null || GraphicsEnvironment.isHeadless()) {
390 return null;
391 }
392 AppContext context = getAppContext(target);
393 if (context == null) {
394 // target is not a Component/MenuComponent, try the
395 // appContextMap.
396 context = appContextMap.get(target);
397 }
398 return context;
399 }
400
401 /**
402 * Sets the synchronous status of focus requests on lightweight
403 * components in the specified window to the specified value.
404 * If the boolean parameter is <code>true</code> then the focus
405 * requests on lightweight components will be performed
406 * synchronously, if it is <code>false</code>, then asynchronously.
407 * By default, all windows have their lightweight request status
408 * set to asynchronous.
409 * <p>
410 * The application can only set the status of lightweight focus
411 * requests to synchronous for any of its windows if it doesn't
412 * perform focus transfers between different heavyweight containers.
413 * In this case the observable focus behaviour is the same as with
414 * asynchronous status.
415 * <p>
416 * If the application performs focus transfer between different
417 * heavyweight containers and sets the lightweight focus request
418 * status to synchronous for any of its windows, then further focus
419 * behaviour is unspecified.
420 * <p>
421 * @param w window for which the lightweight focus request status
422 * should be set
423 * @param status the value of lightweight focus request status
424 */
425
426 public static void setLWRequestStatus(Window changed,boolean status){
427 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
428 };
429
430 public static void checkAndSetPolicy(Container cont) {
431 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
432 getCurrentKeyboardFocusManager().
433 getDefaultFocusTraversalPolicy();
434
435 cont.setFocusTraversalPolicy(defaultPolicy);
436 }
437
438 private static FocusTraversalPolicy createLayoutPolicy() {
439 FocusTraversalPolicy policy = null;
440 try {
441 Class<?> layoutPolicyClass =
442 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
443 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
444 }
445 catch (ClassNotFoundException e) {
446 assert false;
447 }
448 catch (InstantiationException e) {
449 assert false;
450 }
451 catch (IllegalAccessException e) {
452 assert false;
453 }
454
455 return policy;
456 }
457
458 /*
459 * Insert a mapping from target to AppContext, for later retrieval
460 * via targetToAppContext() above.
461 */
462 public static void insertTargetMapping(Object target, AppContext appContext) {
463 if (!GraphicsEnvironment.isHeadless()) {
464 if (!setAppContext(target, appContext)) {
465 // Target is not a Component/MenuComponent, use the private Map
466 // instead.
467 appContextMap.put(target, appContext);
468 }
469 }
470 }
471
472 /*
473 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
474 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
475 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
476 * not be called under another lock since it locks the EventQueue.
477 * See bugids 4632918, 4526597.
478 */
479 public static void postEvent(AppContext appContext, AWTEvent event) {
480 if (event == null) {
481 throw new NullPointerException();
482 }
483
484 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
485 if (sea != null && sea.isSequencedEvent(event)) {
486 AWTEvent nested = sea.getNested(event);
487 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
488 nested instanceof TimedWindowEvent)
489 {
490 TimedWindowEvent twe = (TimedWindowEvent)nested;
491 ((SunToolkit)Toolkit.getDefaultToolkit()).
492 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
493 }
494 }
495
496 // All events posted via this method are system-generated.
497 // Placing the following call here reduces considerably the
498 // number of places throughout the toolkit that would
499 // otherwise have to be modified to precisely identify
500 // system-generated events.
501 setSystemGenerated(event);
502 AppContext eventContext = targetToAppContext(event.getSource());
503 if (eventContext != null && !eventContext.equals(appContext)) {
504 throw new RuntimeException("Event posted on wrong app context : " + event);
505 }
506 PostEventQueue postEventQueue =
507 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
508 if (postEventQueue != null) {
509 postEventQueue.postEvent(event);
510 }
511 }
512
513 /*
514 * Post AWTEvent of high priority.
515 */
516 public static void postPriorityEvent(final AWTEvent e) {
517 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
518 public void run() {
519 AWTAccessor.getAWTEventAccessor().setPosted(e);
520 ((Component)e.getSource()).dispatchEvent(e);
521 }
522 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
523 postEvent(targetToAppContext(e.getSource()), pe);
524 }
525
526 /*
527 * Flush any pending events which haven't been posted to the AWT
528 * EventQueue yet.
529 */
530 public static void flushPendingEvents() {
531 AppContext appContext = AppContext.getAppContext();
532 flushPendingEvents(appContext);
533 }
534
535 /*
536 * Flush the PostEventQueue for the right AppContext.
537 * The default flushPendingEvents only flushes the thread-local context,
538 * which is not always correct, c.f. 3746956
539 */
540 public static void flushPendingEvents(AppContext appContext) {
541 PostEventQueue postEventQueue =
542 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
543 if (postEventQueue != null) {
544 postEventQueue.flush();
545 }
546 }
547
548 /*
549 * Execute a chunk of code on the Java event handler thread for the
550 * given target. Does not wait for the execution to occur before
551 * returning to the caller.
552 */
553 public static void executeOnEventHandlerThread(Object target,
554 Runnable runnable) {
555 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
556 }
557
558 /*
559 * Fixed 5064013: the InvocationEvent time should be equals
560 * the time of the ActionEvent
561 */
562 @SuppressWarnings("serial")
563 public static void executeOnEventHandlerThread(Object target,
564 Runnable runnable,
565 final long when) {
566 executeOnEventHandlerThread(
567 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
568 public long getWhen() {
569 return when;
570 }
571 });
572 }
573
574 /*
575 * Execute a chunk of code on the Java event handler thread for the
576 * given target. Does not wait for the execution to occur before
577 * returning to the caller.
578 */
579 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
580 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
581 }
582
583 /*
584 * Execute a chunk of code on the Java event handler thread. The
585 * method takes into account provided AppContext and sets
586 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
587 * event. See 6451487 for detailes.
588 * Does not wait for the execution to occur before returning to
589 * the caller.
590 */
591 public static void invokeLaterOnAppContext(
592 AppContext appContext, Runnable dispatcher)
593 {
594 postEvent(appContext,
595 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
596 PeerEvent.PRIORITY_EVENT));
597 }
598
599 /*
600 * Execute a chunk of code on the Java event handler thread for the
601 * given target. Waits for the execution to occur before returning
602 * to the caller.
603 */
604 public static void executeOnEDTAndWait(Object target, Runnable runnable)
605 throws InterruptedException, InvocationTargetException
606 {
607 if (EventQueue.isDispatchThread()) {
608 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
609 }
610
611 class AWTInvocationLock {}
612 Object lock = new AWTInvocationLock();
613
614 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
615
616 synchronized (lock) {
617 executeOnEventHandlerThread(event);
618 while(!event.isDispatched()) {
619 lock.wait();
620 }
621 }
622
623 Throwable eventThrowable = event.getThrowable();
624 if (eventThrowable != null) {
625 throw new InvocationTargetException(eventThrowable);
626 }
627 }
628
629 /*
630 * Returns true if the calling thread is the event dispatch thread
631 * contained within AppContext which associated with the given target.
632 * Use this call to ensure that a given task is being executed
633 * (or not being) on the event dispatch thread for the given target.
634 */
635 public static boolean isDispatchThreadForAppContext(Object target) {
636 AppContext appContext = targetToAppContext(target);
637 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
638
639 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
640 return accessor.isDispatchThreadImpl(eq);
641 }
642
643 public Dimension getScreenSize() {
644 return new Dimension(getScreenWidth(), getScreenHeight());
645 }
646 protected abstract int getScreenWidth();
647 protected abstract int getScreenHeight();
648
649 @SuppressWarnings("deprecation")
650 public FontMetrics getFontMetrics(Font font) {
651 return FontDesignMetrics.getMetrics(font);
652 }
653
654 @SuppressWarnings("deprecation")
655 public String[] getFontList() {
656 String[] hardwiredFontList = {
657 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
658 Font.DIALOG_INPUT
659
660 // -- Obsolete font names from 1.0.2. It was decided that
661 // -- getFontList should not return these old names:
662 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
663 };
664 return hardwiredFontList;
665 }
666
667 public PanelPeer createPanel(Panel target) {
668 return (PanelPeer)createComponent(target);
669 }
670
671 public CanvasPeer createCanvas(Canvas target) {
672 return (CanvasPeer)createComponent(target);
673 }
674
675 /**
676 * Disables erasing of background on the canvas before painting if
677 * this is supported by the current toolkit. It is recommended to
678 * call this method early, before the Canvas becomes displayable,
679 * because some Toolkit implementations do not support changing
680 * this property once the Canvas becomes displayable.
681 */
682 public void disableBackgroundErase(Canvas canvas) {
683 disableBackgroundEraseImpl(canvas);
684 }
685
686 /**
687 * Disables the native erasing of the background on the given
688 * component before painting if this is supported by the current
689 * toolkit. This only has an effect for certain components such as
690 * Canvas, Panel and Window. It is recommended to call this method
691 * early, before the Component becomes displayable, because some
692 * Toolkit implementations do not support changing this property
693 * once the Component becomes displayable.
694 */
695 public void disableBackgroundErase(Component component) {
696 disableBackgroundEraseImpl(component);
697 }
698
699 private void disableBackgroundEraseImpl(Component component) {
700 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
701 }
702
703 /**
704 * Returns the value of "sun.awt.noerasebackground" property. Default
705 * value is {@code false}.
706 */
707 public static boolean getSunAwtNoerasebackground() {
708 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
709 }
710
711 /**
712 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
713 * value is {@code false}.
714 */
715 public static boolean getSunAwtErasebackgroundonresize() {
716 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
717 }
718
719
720 static final SoftCache imgCache = new SoftCache();
721
722 static Image getImageFromHash(Toolkit tk, URL url) {
723 checkPermissions(url);
724 synchronized (imgCache) {
725 Image img = (Image)imgCache.get(url);
726 if (img == null) {
727 try {
728 img = tk.createImage(new URLImageSource(url));
729 imgCache.put(url, img);
730 } catch (Exception e) {
731 }
732 }
733 return img;
734 }
735 }
736
737 static Image getImageFromHash(Toolkit tk,
738 String filename) {
739 checkPermissions(filename);
740 synchronized (imgCache) {
741 Image img = (Image)imgCache.get(filename);
742 if (img == null) {
743 try {
744 img = tk.createImage(new FileImageSource(filename));
745 imgCache.put(filename, img);
746 } catch (Exception e) {
747 }
748 }
749 return img;
750 }
751 }
752
753 public Image getImage(String filename) {
754 return getImageFromHash(this, filename);
755 }
756
757 public Image getImage(URL url) {
758 return getImageFromHash(this, url);
759 }
760
761 protected Image getImageWithResolutionVariant(String fileName,
762 String resolutionVariantName) {
763 synchronized (imgCache) {
764 Image image = getImageFromHash(this, fileName);
765 if (image instanceof MultiResolutionImage) {
766 return image;
767 }
768 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
769 image = createImageWithResolutionVariant(image, resolutionVariant);
770 imgCache.put(fileName, image);
771 return image;
772 }
773 }
774
775 protected Image getImageWithResolutionVariant(URL url,
776 URL resolutionVariantURL) {
777 synchronized (imgCache) {
778 Image image = getImageFromHash(this, url);
779 if (image instanceof MultiResolutionImage) {
780 return image;
781 }
782 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
783 image = createImageWithResolutionVariant(image, resolutionVariant);
784 imgCache.put(url, image);
785 return image;
786 }
787 }
788
789
790 public Image createImage(String filename) {
791 checkPermissions(filename);
792 return createImage(new FileImageSource(filename));
793 }
794
795 public Image createImage(URL url) {
796 checkPermissions(url);
797 return createImage(new URLImageSource(url));
798 }
799
800 public Image createImage(byte[] data, int offset, int length) {
801 return createImage(new ByteArrayImageSource(data, offset, length));
802 }
803
804 public Image createImage(ImageProducer producer) {
805 return new ToolkitImage(producer);
806 }
807
808 public static Image createImageWithResolutionVariant(Image image,
809 Image resolutionVariant) {
810 return new MultiResolutionToolkitImage(image, resolutionVariant);
811 }
812
813 public int checkImage(Image img, int w, int h, ImageObserver o) {
814 if (!(img instanceof ToolkitImage)) {
815 return ImageObserver.ALLBITS;
816 }
817
818 ToolkitImage tkimg = (ToolkitImage)img;
819 int repbits;
820 if (w == 0 || h == 0) {
821 repbits = ImageObserver.ALLBITS;
822 } else {
823 repbits = tkimg.getImageRep().check(o);
824 }
825 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
826 }
827
828 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
829 if (w == 0 || h == 0) {
830 return true;
831 }
832
833 // Must be a ToolkitImage
834 if (!(img instanceof ToolkitImage)) {
835 return true;
836 }
837
838 ToolkitImage tkimg = (ToolkitImage)img;
839 if (tkimg.hasError()) {
840 if (o != null) {
841 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
842 -1, -1, -1, -1);
843 }
844 return false;
845 }
846 ImageRepresentation ir = tkimg.getImageRep();
847 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
848 }
849
850 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
851 ToolkitImage rvImage = getResolutionVariant(img);
852 // Ignore the resolution variant in case of error
853 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
854 checkImage(rvImage, 2 * w, 2 * h, MultiResolutionToolkitImage.
855 getResolutionVariantObserver(
856 img, o, w, h, 2 * w, 2 * h));
857 }
858
859 private boolean prepareResolutionVariant(Image img, int w, int h,
860 ImageObserver o) {
861
862 ToolkitImage rvImage = getResolutionVariant(img);
863 // Ignore the resolution variant in case of error
864 return rvImage == null || rvImage.hasError() || prepareImage(
865 rvImage, 2 * w, 2 * h,
866 MultiResolutionToolkitImage.getResolutionVariantObserver(
867 img, o, w, h, 2 * w, 2 * h));
868 }
869
870 private static ToolkitImage getResolutionVariant(Image image) {
871 if (image instanceof MultiResolutionToolkitImage) {
872 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
873 getResolutionVariant();
874 if (resolutionVariant instanceof ToolkitImage) {
875 return (ToolkitImage) resolutionVariant;
876 }
877 }
878 return null;
879 }
880
881 protected static boolean imageCached(Object key) {
882 return imgCache.containsKey(key);
883 }
884
885 protected static boolean imageExists(String filename) {
886 checkPermissions(filename);
887 return filename != null && new File(filename).exists();
888 }
889
890 @SuppressWarnings("try")
891 protected static boolean imageExists(URL url) {
892 checkPermissions(url);
893 if (url != null) {
894 try (InputStream is = url.openStream()) {
895 return true;
896 }catch(IOException e){
897 return false;
898 }
899 }
900 return false;
901 }
902
903 private static void checkPermissions(String filename) {
904 SecurityManager security = System.getSecurityManager();
905 if (security != null) {
906 security.checkRead(filename);
907 }
908 }
909
910 private static void checkPermissions(URL url) {
911 SecurityManager sm = System.getSecurityManager();
912 if (sm != null) {
913 try {
914 java.security.Permission perm =
915 url.openConnection().getPermission();
916 if (perm != null) {
917 try {
918 sm.checkPermission(perm);
919 } catch (SecurityException se) {
920 // fallback to checkRead/checkConnect for pre 1.2
921 // security managers
922 if ((perm instanceof java.io.FilePermission) &&
923 perm.getActions().indexOf("read") != -1) {
924 sm.checkRead(perm.getName());
925 } else if ((perm instanceof
926 java.net.SocketPermission) &&
927 perm.getActions().indexOf("connect") != -1) {
928 sm.checkConnect(url.getHost(), url.getPort());
929 } else {
930 throw se;
931 }
932 }
933 }
934 } catch (java.io.IOException ioe) {
935 sm.checkConnect(url.getHost(), url.getPort());
936 }
937 }
938 }
939
940 /**
941 * Scans {@code imageList} for best-looking image of specified dimensions.
942 * Image can be scaled and/or padded with transparency.
943 */
944 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
945 if (width == 0 || height == 0) {
946 return null;
947 }
948 Image bestImage = null;
949 int bestWidth = 0;
950 int bestHeight = 0;
951 double bestSimilarity = 3; //Impossibly high value
952 double bestScaleFactor = 0;
953 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
954 //Iterate imageList looking for best matching image.
955 //'Similarity' measure is defined as good scale factor and small insets.
956 //best possible similarity is 0 (no scale, no insets).
957 //It's found while the experiments that good-looking result is achieved
958 //with scale factors x1, x3/4, x2/3, xN, x1/N.
959 Image im = i.next();
960 if (im == null) {
961 continue;
962 }
963 if (im instanceof ToolkitImage) {
964 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
965 ir.reconstruct(ImageObserver.ALLBITS);
966 }
967 int iw;
968 int ih;
969 try {
970 iw = im.getWidth(null);
971 ih = im.getHeight(null);
972 } catch (Exception e){
973 continue;
974 }
975 if (iw > 0 && ih > 0) {
976 //Calc scale factor
977 double scaleFactor = Math.min((double)width / (double)iw,
978 (double)height / (double)ih);
979 //Calculate scaled image dimensions
980 //adjusting scale factor to nearest "good" value
981 int adjw = 0;
982 int adjh = 0;
983 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
984 if (scaleFactor >= 2) {
985 //Need to enlarge image more than twice
986 //Round down scale factor to multiply by integer value
987 scaleFactor = Math.floor(scaleFactor);
988 adjw = iw * (int)scaleFactor;
989 adjh = ih * (int)scaleFactor;
990 scaleMeasure = 1.0 - 0.5 / scaleFactor;
991 } else if (scaleFactor >= 1) {
992 //Don't scale
993 scaleFactor = 1.0;
994 adjw = iw;
995 adjh = ih;
996 scaleMeasure = 0;
997 } else if (scaleFactor >= 0.75) {
998 //Multiply by 3/4
999 scaleFactor = 0.75;
1000 adjw = iw * 3 / 4;
1001 adjh = ih * 3 / 4;
1002 scaleMeasure = 0.3;
1003 } else if (scaleFactor >= 0.6666) {
1004 //Multiply by 2/3
1005 scaleFactor = 0.6666;
1006 adjw = iw * 2 / 3;
1007 adjh = ih * 2 / 3;
1008 scaleMeasure = 0.33;
1009 } else {
1010 //Multiply size by 1/scaleDivider
1011 //where scaleDivider is minimum possible integer
1012 //larger than 1/scaleFactor
1013 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1014 scaleFactor = 1.0 / scaleDivider;
1015 adjw = (int)Math.round((double)iw / scaleDivider);
1016 adjh = (int)Math.round((double)ih / scaleDivider);
1017 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1018 }
1019 double similarity = ((double)width - (double)adjw) / (double)width +
1020 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1021 scaleMeasure; //Large rescale is bad
1022 if (similarity < bestSimilarity) {
1023 bestSimilarity = similarity;
1024 bestScaleFactor = scaleFactor;
1025 bestImage = im;
1026 bestWidth = adjw;
1027 bestHeight = adjh;
1028 }
1029 if (similarity == 0) break;
1030 }
1031 }
1032 if (bestImage == null) {
1033 //No images were found, possibly all are broken
1034 return null;
1035 }
1036 BufferedImage bimage =
1037 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1038 Graphics2D g = bimage.createGraphics();
1039 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1040 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1041 try {
1042 int x = (width - bestWidth) / 2;
1043 int y = (height - bestHeight) / 2;
1044 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1045 } finally {
1046 g.dispose();
1047 }
1048 return bimage;
1049 }
1050
1051 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1052 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1053 if (bimage == null) {
1054 return null;
1055 }
1056 Raster raster = bimage.getRaster();
1057 DataBuffer buffer = raster.getDataBuffer();
1058 return (DataBufferInt)buffer;
1059 }
1060
1061 protected EventQueue getSystemEventQueueImpl() {
1062 return getSystemEventQueueImplPP();
1063 }
1064
1065 // Package private implementation
1066 static EventQueue getSystemEventQueueImplPP() {
1067 return getSystemEventQueueImplPP(AppContext.getAppContext());
1068 }
1069
1070 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1071 EventQueue theEventQueue =
1072 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1073 return theEventQueue;
1074 }
1075
1076 /**
1077 * Give native peers the ability to query the native container
1078 * given a native component (eg the direct parent may be lightweight).
1079 */
1080 public static Container getNativeContainer(Component c) {
1081 return Toolkit.getNativeContainer(c);
1082 }
1083
1084 /**
1085 * Gives native peers the ability to query the closest HW component.
1086 * If the given component is heavyweight, then it returns this. Otherwise,
1087 * it goes one level up in the hierarchy and tests next component.
1088 */
1089 public static Component getHeavyweightComponent(Component c) {
1090 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1091 c = AWTAccessor.getComponentAccessor().getParent(c);
1092 }
1093 return c;
1094 }
1095
1096 /**
1097 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1098 */
1099 public int getFocusAcceleratorKeyMask() {
1100 return InputEvent.ALT_MASK;
1101 }
1102
1103 /**
1104 * Tests whether specified key modifiers mask can be used to enter a printable
1105 * character. This is a default implementation of this method, which reflects
1106 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1107 * characters from the extended character set (like euro sign or math symbols)
1108 */
1109 public boolean isPrintableCharacterModifiersMask(int mods) {
1110 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1111 }
1112
1113 /**
1114 * Returns whether popup is allowed to be shown above the task bar.
1115 * This is a default implementation of this method, which checks
1116 * corresponding security permission.
1117 */
1118 public boolean canPopupOverlapTaskBar() {
1119 boolean result = true;
1120 try {
1121 SecurityManager sm = System.getSecurityManager();
1122 if (sm != null) {
1123 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1124 }
1125 } catch (SecurityException se) {
1126 // There is no permission to show popups over the task bar
1127 result = false;
1128 }
1129 return result;
1130 }
1131
1132 /**
1133 * Returns a new input method window, with behavior as specified in
1134 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1135 * If the inputContext is not null, the window should return it from its
1136 * getInputContext() method. The window needs to implement
1137 * sun.awt.im.InputMethodWindow.
1138 * <p>
1139 * SunToolkit subclasses can override this method to return better input
1140 * method windows.
1141 */
1142 public Window createInputMethodWindow(String title, InputContext context) {
1143 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1144 }
1145
1146 /**
1147 * Returns whether enableInputMethods should be set to true for peered
1148 * TextComponent instances on this platform. False by default.
1149 */
1150 public boolean enableInputMethodsForTextComponent() {
1151 return false;
1152 }
1153
1154 private static Locale startupLocale = null;
1155
1156 /**
1157 * Returns the locale in which the runtime was started.
1158 */
1159 public static Locale getStartupLocale() {
1160 if (startupLocale == null) {
1161 String language, region, country, variant;
1162 language = AccessController.doPrivileged(
1163 new GetPropertyAction("user.language", "en"));
1164 // for compatibility, check for old user.region property
1165 region = AccessController.doPrivileged(
1166 new GetPropertyAction("user.region"));
1167 if (region != null) {
1168 // region can be of form country, country_variant, or _variant
1169 int i = region.indexOf('_');
1170 if (i >= 0) {
1171 country = region.substring(0, i);
1172 variant = region.substring(i + 1);
1173 } else {
1174 country = region;
1175 variant = "";
1176 }
1177 } else {
1178 country = AccessController.doPrivileged(
1179 new GetPropertyAction("user.country", ""));
1180 variant = AccessController.doPrivileged(
1181 new GetPropertyAction("user.variant", ""));
1182 }
1183 startupLocale = new Locale(language, country, variant);
1184 }
1185 return startupLocale;
1186 }
1187
1188 /**
1189 * Returns the default keyboard locale of the underlying operating system
1190 */
1191 public Locale getDefaultKeyboardLocale() {
1192 return getStartupLocale();
1193 }
1194
1195 // Support for window closing event notifications
1196 private transient WindowClosingListener windowClosingListener = null;
1197 /**
1198 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1199 */
1200 public WindowClosingListener getWindowClosingListener() {
1201 return windowClosingListener;
1202 }
1203 /**
1204 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1205 */
1206 public void setWindowClosingListener(WindowClosingListener wcl) {
1207 windowClosingListener = wcl;
1208 }
1209
1210 /**
1211 * @see sun.awt.WindowClosingListener#windowClosingNotify
1212 */
1213 public RuntimeException windowClosingNotify(WindowEvent event) {
1214 if (windowClosingListener != null) {
1215 return windowClosingListener.windowClosingNotify(event);
1216 } else {
1217 return null;
1218 }
1219 }
1220 /**
1221 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1222 */
1223 public RuntimeException windowClosingDelivered(WindowEvent event) {
1224 if (windowClosingListener != null) {
1225 return windowClosingListener.windowClosingDelivered(event);
1226 } else {
1227 return null;
1228 }
1229 }
1230
1231 private static DefaultMouseInfoPeer mPeer = null;
1232
1233 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1234 if (mPeer == null) {
1235 mPeer = new DefaultMouseInfoPeer();
1236 }
1237 return mPeer;
1238 }
1239
1240
1241 /**
1242 * Returns whether default toolkit needs the support of the xembed
1243 * from embedding host(if any).
1244 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1245 */
1246 public static boolean needsXEmbed() {
1247 String noxembed = AccessController.
1248 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1249 if ("true".equals(noxembed)) {
1250 return false;
1251 }
1252
1253 Toolkit tk = Toolkit.getDefaultToolkit();
1254 if (tk instanceof SunToolkit) {
1255 // SunToolkit descendants should override this method to specify
1256 // concrete behavior
1257 return ((SunToolkit)tk).needsXEmbedImpl();
1258 } else {
1259 // Non-SunToolkit doubtly might support XEmbed
1260 return false;
1261 }
1262 }
1263
1264 /**
1265 * Returns whether this toolkit needs the support of the xembed
1266 * from embedding host(if any).
1267 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1268 */
1269 protected boolean needsXEmbedImpl() {
1270 return false;
1271 }
1272
1273 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1274
1275 /**
1276 * Returns whether the XEmbed server feature is requested by
1277 * developer. If true, Toolkit should return an
1278 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1279 */
1280 protected final boolean isXEmbedServerRequested() {
1281 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1282 }
1283
1284 /**
1285 * Returns whether the modal exclusion API is supported by the current toolkit.
1286 * When it isn't supported, calling <code>setModalExcluded</code> has no
1287 * effect, and <code>isModalExcluded</code> returns false for all windows.
1288 *
1289 * @return true if modal exclusion is supported by the toolkit, false otherwise
1290 *
1291 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1292 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1293 *
1294 * @since 1.5
1295 */
1296 public static boolean isModalExcludedSupported()
1297 {
1298 Toolkit tk = Toolkit.getDefaultToolkit();
1299 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1300 }
1301 /*
1302 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1303 *
1304 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1305 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1306 *
1307 * @since 1.5
1308 */
1309 protected boolean isModalExcludedSupportedImpl()
1310 {
1311 return false;
1312 }
1313
1314 /*
1315 * Sets this window to be excluded from being modally blocked. When the
1316 * toolkit supports modal exclusion and this method is called, input
1317 * events, focus transfer and z-order will continue to work for the
1318 * window, it's owned windows and child components, even in the
1319 * presence of a modal dialog.
1320 * For details on which <code>Window</code>s are normally blocked
1321 * by modal dialog, see {@link java.awt.Dialog}.
1322 * Invoking this method when the modal exclusion API is not supported by
1323 * the current toolkit has no effect.
1324 * @param window Window to be marked as not modally blocked
1325 * @see java.awt.Dialog
1326 * @see java.awt.Dialog#setModal(boolean)
1327 * @see sun.awt.SunToolkit#isModalExcludedSupported
1328 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1329 */
1330 public static void setModalExcluded(Window window)
1331 {
1332 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1333 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1334 }
1335 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1336 }
1337
1338 /*
1339 * Returns whether the specified window is blocked by modal dialogs.
1340 * If the modal exclusion API isn't supported by the current toolkit,
1341 * it returns false for all windows.
1342 *
1343 * @param window Window to test for modal exclusion
1344 *
1345 * @return true if the window is modal excluded, false otherwise. If
1346 * the modal exclusion isn't supported by the current Toolkit, false
1347 * is returned
1348 *
1349 * @see sun.awt.SunToolkit#isModalExcludedSupported
1350 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1351 *
1352 * @since 1.5
1353 */
1354 public static boolean isModalExcluded(Window window)
1355 {
1356 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1357 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1358 }
1359 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1360 }
1361
1362 /**
1363 * Overridden in XToolkit and WToolkit
1364 */
1365 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1366 return (modalityType == Dialog.ModalityType.MODELESS) ||
1367 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1368 }
1369
1370 /**
1371 * Overridden in XToolkit and WToolkit
1372 */
1373 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1374 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1375 }
1376
1377 ///////////////////////////////////////////////////////////////////////////
1378 //
1379 // The following is used by the Java Plug-in to coordinate dialog modality
1380 // between containing applications (browsers, ActiveX containers etc) and
1381 // the AWT.
1382 //
1383 ///////////////////////////////////////////////////////////////////////////
1384
1385 private ModalityListenerList modalityListeners = new ModalityListenerList();
1386
1387 public void addModalityListener(ModalityListener listener) {
1388 modalityListeners.add(listener);
1389 }
1390
1391 public void removeModalityListener(ModalityListener listener) {
1392 modalityListeners.remove(listener);
1393 }
1394
1395 public void notifyModalityPushed(Dialog dialog) {
1396 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1397 }
1398
1399 public void notifyModalityPopped(Dialog dialog) {
1400 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1401 }
1402
1403 final void notifyModalityChange(int id, Dialog source) {
1404 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1405 ev.dispatch();
1406 }
1407
1408 static class ModalityListenerList implements ModalityListener {
1409
1410 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1411
1412 void add(ModalityListener listener) {
1413 listeners.addElement(listener);
1414 }
1415
1416 void remove(ModalityListener listener) {
1417 listeners.removeElement(listener);
1418 }
1419
1420 public void modalityPushed(ModalityEvent ev) {
1421 Iterator<ModalityListener> it = listeners.iterator();
1422 while (it.hasNext()) {
1423 it.next().modalityPushed(ev);
1424 }
1425 }
1426
1427 public void modalityPopped(ModalityEvent ev) {
1428 Iterator<ModalityListener> it = listeners.iterator();
1429 while (it.hasNext()) {
1430 it.next().modalityPopped(ev);
1431 }
1432 }
1433 } // end of class ModalityListenerList
1434
1435 ///////////////////////////////////////////////////////////////////////////
1436 // End Plug-in code
1437 ///////////////////////////////////////////////////////////////////////////
1438
1439 public static boolean isLightweightOrUnknown(Component comp) {
1440 if (comp.isLightweight()
1441 || !(getDefaultToolkit() instanceof SunToolkit))
1442 {
1443 return true;
1444 }
1445 return !(comp instanceof Button
1446 || comp instanceof Canvas
1447 || comp instanceof Checkbox
1448 || comp instanceof Choice
1449 || comp instanceof Label
1450 || comp instanceof java.awt.List
1451 || comp instanceof Panel
1452 || comp instanceof Scrollbar
1453 || comp instanceof ScrollPane
1454 || comp instanceof TextArea
1455 || comp instanceof TextField
1456 || comp instanceof Window);
1457 }
1458
1459 @SuppressWarnings("serial")
1460 public static class OperationTimedOut extends RuntimeException {
1461 public OperationTimedOut(String msg) {
1462 super(msg);
1463 }
1464 public OperationTimedOut() {
1465 }
1466 }
1467
1468 @SuppressWarnings("serial")
1469 public static class InfiniteLoop extends RuntimeException {
1470 }
1471
1472 @SuppressWarnings("serial")
1473 public static class IllegalThreadException extends RuntimeException {
1474 public IllegalThreadException(String msg) {
1475 super(msg);
1476 }
1477 public IllegalThreadException() {
1478 }
1479 }
1480
1481 public static final int DEFAULT_WAIT_TIME = 10000;
1482 private static final int MAX_ITERS = 20;
1483 private static final int MIN_ITERS = 0;
1484 private static final int MINIMAL_EDELAY = 0;
1485
1486 /**
1487 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1488 */
1489 public void realSync() throws OperationTimedOut, InfiniteLoop {
1490 realSync(DEFAULT_WAIT_TIME);
1491 }
1492
1493 /**
1494 * Forces toolkit to synchronize with the native windowing
1495 * sub-system, flushing all pending work and waiting for all the
1496 * events to be processed. This method guarantees that after
1497 * return no additional Java events will be generated, unless
1498 * cause by user. Obviously, the method cannot be used on the
1499 * event dispatch thread (EDT). In case it nevertheless gets
1500 * invoked on this thread, the method throws the
1501 * IllegalThreadException runtime exception.
1502 *
1503 * <p> This method allows to write tests without explicit timeouts
1504 * or wait for some event. Example:
1505 * <code>
1506 * Frame f = ...;
1507 * f.setVisible(true);
1508 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1509 * </code>
1510 *
1511 * <p> After realSync, <code>f</code> will be completely visible
1512 * on the screen, its getLocationOnScreen will be returning the
1513 * right result and it will be the focus owner.
1514 *
1515 * <p> Another example:
1516 * <code>
1517 * b.requestFocus();
1518 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1519 * </code>
1520 *
1521 * <p> After realSync, <code>b</code> will be focus owner.
1522 *
1523 * <p> Notice that realSync isn't guaranteed to work if recurring
1524 * actions occur, such as if during processing of some event
1525 * another request which may generate some events occurs. By
1526 * default, sync tries to perform as much as {@value MAX_ITERS}
1527 * cycles of event processing, allowing for roughly {@value
1528 * MAX_ITERS} additional requests.
1529 *
1530 * <p> For example, requestFocus() generates native request, which
1531 * generates one or two Java focus events, which then generate a
1532 * serie of paint events, a serie of Java focus events, which then
1533 * generate a serie of paint events which then are processed -
1534 * three cycles, minimum.
1535 *
1536 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1537 */
1538 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1539 {
1540 if (EventQueue.isDispatchThread()) {
1541 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1542 }
1543 int bigLoop = 0;
1544 do {
1545 // Let's do sync first
1546 sync();
1547
1548 // During the wait process, when we were processing incoming
1549 // events, we could have made some new request, which can
1550 // generate new events. Example: MapNotify/XSetInputFocus.
1551 // Therefore, we dispatch them as long as there is something
1552 // to dispatch.
1553 int iters = 0;
1554 while (iters < MIN_ITERS) {
1555 syncNativeQueue(timeout);
1556 iters++;
1557 }
1558 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1559 iters++;
1560 }
1561 if (iters >= MAX_ITERS) {
1562 throw new InfiniteLoop();
1563 }
1564
1565 // native requests were dispatched by X/Window Manager or Windows
1566 // Moreover, we processed them all on Toolkit thread
1567 // Now wait while EDT processes them.
1568 //
1569 // During processing of some events (focus, for example),
1570 // some other events could have been generated. So, after
1571 // waitForIdle, we may end up with full EventQueue
1572 iters = 0;
1573 while (iters < MIN_ITERS) {
1574 waitForIdle(timeout);
1575 iters++;
1576 }
1577 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1578 iters++;
1579 }
1580 if (iters >= MAX_ITERS) {
1581 throw new InfiniteLoop();
1582 }
1583
1584 bigLoop++;
1585 // Again, for Java events, it was simple to check for new Java
1586 // events by checking event queue, but what if Java events
1587 // resulted in native requests? Therefor, check native events again.
1588 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1589 }
1590
1591 /**
1592 * Platform toolkits need to implement this method to perform the
1593 * sync of the native queue. The method should wait until native
1594 * requests are processed, all native events are processed and
1595 * corresponding Java events are generated. Should return
1596 * <code>true</code> if some events were processed,
1597 * <code>false</code> otherwise.
1598 */
1599 protected abstract boolean syncNativeQueue(final long timeout);
1600
1601 private boolean eventDispatched = false;
1602 private boolean queueEmpty = false;
1603 private final Object waitLock = "Wait Lock";
1604
1605 private boolean isEQEmpty() {
1606 EventQueue queue = getSystemEventQueueImpl();
1607 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1608 }
1609
1610 /**
1611 * Waits for the Java event queue to empty. Ensures that all
1612 * events are processed (including paint events), and that if
1613 * recursive events were generated, they are also processed.
1614 * Should return <code>true</code> if more processing is
1615 * necessary, <code>false</code> otherwise.
1616 */
1617 @SuppressWarnings("serial")
1618 protected final boolean waitForIdle(final long timeout) {
1619 flushPendingEvents();
1620 boolean queueWasEmpty = isEQEmpty();
1621 queueEmpty = false;
1622 eventDispatched = false;
1623 synchronized(waitLock) {
1624 postEvent(AppContext.getAppContext(),
1625 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1626 public void dispatch() {
1627 // Here we block EDT. It could have some
1628 // events, it should have dispatched them by
1629 // now. So native requests could have been
1630 // generated. First, dispatch them. Then,
1631 // flush Java events again.
1632 int iters = 0;
1633 while (iters < MIN_ITERS) {
1634 syncNativeQueue(timeout);
1635 iters++;
1636 }
1637 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1638 iters++;
1639 }
1640 flushPendingEvents();
1641
1642 synchronized(waitLock) {
1643 queueEmpty = isEQEmpty();
1644 eventDispatched = true;
1645 waitLock.notifyAll();
1646 }
1647 }
1648 });
1649 try {
1650 while (!eventDispatched) {
1651 waitLock.wait();
1652 }
1653 } catch (InterruptedException ie) {
1654 return false;
1655 }
1656 }
1657
1658 try {
1659 Thread.sleep(MINIMAL_EDELAY);
1660 } catch (InterruptedException ie) {
1661 throw new RuntimeException("Interrupted");
1662 }
1663
1664 flushPendingEvents();
1665
1666 // Lock to force write-cache flush for queueEmpty.
1667 synchronized (waitLock) {
1668 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1669 }
1670 }
1671
1672 /**
1673 * Grabs the mouse input for the given window. The window must be
1674 * visible. The window or its children do not receive any
1675 * additional mouse events besides those targeted to them. All
1676 * other events will be dispatched as before - to the respective
1677 * targets. This Window will receive UngrabEvent when automatic
1678 * ungrab is about to happen. The event can be listened to by
1679 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1680 * UngrabEvent class for the list of conditions when ungrab is
1681 * about to happen.
1682 * @see UngrabEvent
1683 */
1684 public abstract void grab(Window w);
1685
1686 /**
1687 * Forces ungrab. No event will be sent.
1688 */
1689 public abstract void ungrab(Window w);
1690
1691
1692 /**
1693 * Locates the splash screen library in a platform dependent way and closes
1694 * the splash screen. Should be invoked on first top-level frame display.
1695 * @see java.awt.SplashScreen
1696 * @since 1.6
1697 */
1698 public static native void closeSplashScreen();
1699
1700 /* The following methods and variables are to support retrieving
1701 * desktop text anti-aliasing settings
1702 */
1703
1704 /* Need an instance method because setDesktopProperty(..) is protected. */
1705 private void fireDesktopFontPropertyChanges() {
1706 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1707 SunToolkit.getDesktopFontHints());
1708 }
1709
1710 private static boolean checkedSystemAAFontSettings;
1711 private static boolean useSystemAAFontSettings;
1712 private static boolean lastExtraCondition = true;
1713 private static RenderingHints desktopFontHints;
1714
1715 /* Since Swing is the reason for this "extra condition" logic its
1716 * worth documenting it in some detail.
1717 * First, a goal is for Swing and applications to both retrieve and
1718 * use the same desktop property value so that there is complete
1719 * consistency between the settings used by JDK's Swing implementation
1720 * and 3rd party custom Swing components, custom L&Fs and any general
1721 * text rendering that wants to be consistent with these.
1722 * But by default on Solaris & Linux Swing will not use AA text over
1723 * remote X11 display (unless Xrender can be used which is TBD and may not
1724 * always be available anyway) as that is a noticeable performance hit.
1725 * So there needs to be a way to express that extra condition so that
1726 * it is seen by all clients of the desktop property API.
1727 * If this were the only condition it could be handled here as it would
1728 * be the same for any L&F and could reasonably be considered to be
1729 * a static behaviour of those systems.
1730 * But GTK currently has an additional test based on locale which is
1731 * not applied by Metal. So mixing GTK in a few locales with Metal
1732 * would mean the last one wins.
1733 * This could be stored per-app context which would work
1734 * for different applets, but wouldn't help for a single application
1735 * using GTK and some other L&F concurrently.
1736 * But it is expected this will be addressed within GTK and the font
1737 * system so is a temporary and somewhat unlikely harmless corner case.
1738 */
1739 public static void setAAFontSettingsCondition(boolean extraCondition) {
1740 if (extraCondition != lastExtraCondition) {
1741 lastExtraCondition = extraCondition;
1742 if (checkedSystemAAFontSettings) {
1743 /* Someone already asked for this info, under a different
1744 * condition.
1745 * We'll force re-evaluation instead of replicating the
1746 * logic, then notify any listeners of any change.
1747 */
1748 checkedSystemAAFontSettings = false;
1749 Toolkit tk = Toolkit.getDefaultToolkit();
1750 if (tk instanceof SunToolkit) {
1751 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1752 }
1753 }
1754 }
1755 }
1756
1757 /* "false", "off", ""default" aren't explicitly tested, they
1758 * just fall through to produce a null return which all are equated to
1759 * "false".
1760 */
1761 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1762 Object aaHint = null;
1763 hintname = hintname.toLowerCase(Locale.ENGLISH);
1764 if (hintname.equals("on")) {
1765 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1766 } else if (hintname.equals("gasp")) {
1767 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1768 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1769 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1770 } else if (hintname.equals("lcd_hbgr")) {
1771 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1772 } else if (hintname.equals("lcd_vrgb")) {
1773 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1774 } else if (hintname.equals("lcd_vbgr")) {
1775 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1776 }
1777 if (aaHint != null) {
1778 RenderingHints map = new RenderingHints(null);
1779 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1780 return map;
1781 } else {
1782 return null;
1783 }
1784 }
1785
1786 /* This method determines whether to use the system font settings,
1787 * or ignore them if a L&F has specified they should be ignored, or
1788 * to override both of these with a system property specified value.
1789 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1790 * system property isn't applied as desktop properties are considered
1791 * to be inapplicable in that case. In that headless case although
1792 * this method will return "true" the toolkit will return a null map.
1793 */
1794 private static boolean useSystemAAFontSettings() {
1795 if (!checkedSystemAAFontSettings) {
1796 useSystemAAFontSettings = true; /* initially set this true */
1797 String systemAAFonts = null;
1798 Toolkit tk = Toolkit.getDefaultToolkit();
1799 if (tk instanceof SunToolkit) {
1800 systemAAFonts =
1801 AccessController.doPrivileged(
1802 new GetPropertyAction("awt.useSystemAAFontSettings"));
1803 }
1804 if (systemAAFonts != null) {
1805 useSystemAAFontSettings =
1806 Boolean.valueOf(systemAAFonts).booleanValue();
1807 /* If it is anything other than "true", then it may be
1808 * a hint name , or it may be "off, "default", etc.
1809 */
1810 if (!useSystemAAFontSettings) {
1811 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1812 }
1813 }
1814 /* If its still true, apply the extra condition */
1815 if (useSystemAAFontSettings) {
1816 useSystemAAFontSettings = lastExtraCondition;
1817 }
1818 checkedSystemAAFontSettings = true;
1819 }
1820 return useSystemAAFontSettings;
1821 }
1822
1823 /* A variable defined for the convenience of JDK code */
1824 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1825
1826 /* Overridden by subclasses to return platform/desktop specific values */
1827 protected RenderingHints getDesktopAAHints() {
1828 return null;
1829 }
1830
1831 /* Subclass desktop property loading methods call this which
1832 * in turn calls the appropriate subclass implementation of
1833 * getDesktopAAHints() when system settings are being used.
1834 * Its public rather than protected because subclasses may delegate
1835 * to a helper class.
1836 */
1837 public static RenderingHints getDesktopFontHints() {
1838 if (useSystemAAFontSettings()) {
1839 Toolkit tk = Toolkit.getDefaultToolkit();
1840 if (tk instanceof SunToolkit) {
1841 Object map = ((SunToolkit)tk).getDesktopAAHints();
1842 return (RenderingHints)map;
1843 } else { /* Headless Toolkit */
1844 return null;
1845 }
1846 } else if (desktopFontHints != null) {
1847 /* cloning not necessary as the return value is cloned later, but
1848 * its harmless.
1849 */
1850 return (RenderingHints)(desktopFontHints.clone());
1851 } else {
1852 return null;
1853 }
1854 }
1855
1856
1857 public abstract boolean isDesktopSupported();
1858
1859 /*
1860 * consumeNextKeyTyped() method is not currently used,
1861 * however Swing could use it in the future.
1862 */
1863 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1864 try {
1865 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1866 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1867 getCurrentKeyboardFocusManager(),
1868 keyEvent);
1869 } catch (ClassCastException cce) {
1870 cce.printStackTrace();
1871 }
1872 }
1873
1874 protected static void dumpPeers(final PlatformLogger aLog) {
1875 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1876 }
1877
1878 /**
1879 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1880 * @return Window ancestor of the component or component by itself if it is Window;
1881 * null, if component is not a part of window hierarchy
1882 */
1883 public static Window getContainingWindow(Component comp) {
1884 while (comp != null && !(comp instanceof Window)) {
1885 comp = comp.getParent();
1886 }
1887 return (Window)comp;
1888 }
1889
1890 private static Boolean sunAwtDisableMixing = null;
1891
1892 /**
1893 * Returns the value of "sun.awt.disableMixing" property. Default
1894 * value is {@code false}.
1895 */
1896 public synchronized static boolean getSunAwtDisableMixing() {
1897 if (sunAwtDisableMixing == null) {
1898 sunAwtDisableMixing = AccessController.doPrivileged(
1899 new GetBooleanAction("sun.awt.disableMixing"));
1900 }
1901 return sunAwtDisableMixing.booleanValue();
1902 }
1903
1904 /**
1905 * Returns true if the native GTK libraries are available. The
1906 * default implementation returns false, but UNIXToolkit overrides this
1907 * method to provide a more specific answer.
1908 */
1909 public boolean isNativeGTKAvailable() {
1910 return false;
1911 }
1912
1913 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1914
1915 public synchronized void setWindowDeactivationTime(Window w, long time) {
1916 AppContext ctx = getAppContext(w);
1917 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1918 if (map == null) {
1919 map = new WeakHashMap<Window, Long>();
1920 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1921 }
1922 map.put(w, time);
1923 }
1924
1925 public synchronized long getWindowDeactivationTime(Window w) {
1926 AppContext ctx = getAppContext(w);
1927 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1928 if (map == null) {
1929 return -1;
1930 }
1931 Long time = map.get(w);
1932 return time == null ? -1 : time;
1933 }
1934
1935 // Cosntant alpha
1936 public boolean isWindowOpacitySupported() {
1937 return false;
1938 }
1939
1940 // Shaping
1941 public boolean isWindowShapingSupported() {
1942 return false;
1943 }
1944
1945 // Per-pixel alpha
1946 public boolean isWindowTranslucencySupported() {
1947 return false;
1948 }
1949
1950 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1951 return false;
1952 }
1953
1954 /**
1955 * Returns true if swing backbuffer should be translucent.
1956 */
1957 public boolean isSwingBackbufferTranslucencySupported() {
1958 return false;
1959 }
1960
1961 /**
1962 * Returns whether or not a containing top level window for the passed
1963 * component is
1964 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1965 *
1966 * @param c a Component which toplevel's to check
1967 * @return {@code true} if the passed component is not null and has a
1968 * containing toplevel window which is opaque (so per-pixel translucency
1969 * is not enabled), {@code false} otherwise
1970 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1971 */
1972 public static boolean isContainingTopLevelOpaque(Component c) {
1973 Window w = getContainingWindow(c);
1974 return w != null && w.isOpaque();
1975 }
1976
1977 /**
1978 * Returns whether or not a containing top level window for the passed
1979 * component is
1980 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1981 *
1982 * @param c a Component which toplevel's to check
1983 * @return {@code true} if the passed component is not null and has a
1984 * containing toplevel window which has opacity less than
1985 * 1.0f (which means that it is translucent), {@code false} otherwise
1986 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1987 */
1988 public static boolean isContainingTopLevelTranslucent(Component c) {
1989 Window w = getContainingWindow(c);
1990 return w != null && w.getOpacity() < 1.0f;
1991 }
1992
1993 /**
1994 * Returns whether the native system requires using the peer.updateWindow()
1995 * method to update the contents of a non-opaque window, or if usual
1996 * painting procedures are sufficient. The default return value covers
1997 * the X11 systems. On MS Windows this method is overriden in WToolkit
1998 * to return true.
1999 */
2000 public boolean needUpdateWindow() {
2001 return false;
2002 }
2003
2004 /**
2005 * Descendants of the SunToolkit should override and put their own logic here.
2006 */
2007 public int getNumberOfButtons(){
2008 return 3;
2009 }
2010
2011 /**
2012 * Checks that the given object implements/extends the given
2013 * interface/class.
2014 *
2015 * Note that using the instanceof operator causes a class to be loaded.
2016 * Using this method doesn't load a class and it can be used instead of
2017 * the instanceof operator for performance reasons.
2018 *
2019 * @param obj Object to be checked
2020 * @param type The name of the interface/class. Must be
2021 * fully-qualified interface/class name.
2022 * @return true, if this object implements/extends the given
2023 * interface/class, false, otherwise, or if obj or type is null
2024 */
2025 public static boolean isInstanceOf(Object obj, String type) {
2026 if (obj == null) return false;
2027 if (type == null) return false;
2028
2029 return isInstanceOf(obj.getClass(), type);
2030 }
2031
2032 private static boolean isInstanceOf(Class<?> cls, String type) {
2033 if (cls == null) return false;
2034
2035 if (cls.getName().equals(type)) {
2036 return true;
2037 }
2038
2039 for (Class<?> c : cls.getInterfaces()) {
2040 if (c.getName().equals(type)) {
2041 return true;
2042 }
2043 }
2044 return isInstanceOf(cls.getSuperclass(), type);
2045 }
2046
2047 ///////////////////////////////////////////////////////////////////////////
2048 //
2049 // The following methods help set and identify whether a particular
2050 // AWTEvent object was produced by the system or by user code. As of this
2051 // writing the only consumer is the Java Plug-In, although this information
2052 // could be useful to more clients and probably should be formalized in
2053 // the public API.
2054 //
2055 ///////////////////////////////////////////////////////////////////////////
2056
2057 public static void setSystemGenerated(AWTEvent e) {
2058 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2059 }
2060
2061 public static boolean isSystemGenerated(AWTEvent e) {
2062 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2063 }
2064
2065 } // class SunToolkit
2066
2067
2068 /*
2069 * PostEventQueue is a Thread that runs in the same AppContext as the
2070 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2071 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2072 * events to this queue, which then calls EventQueue.postEvent().
2073 *
2074 * We do this because EventQueue.postEvent() may be overridden by client
2075 * code, and we mustn't ever call client code from the toolkit thread.
2076 */
2077 class PostEventQueue {
2078 private EventQueueItem queueHead = null;
2079 private EventQueueItem queueTail = null;
2080 private final EventQueue eventQueue;
2081
2082 private Thread flushThread = null;
2083
2084 PostEventQueue(EventQueue eq) {
2085 eventQueue = eq;
2086 }
2087
2088 /*
2089 * Continually post pending AWTEvents to the Java EventQueue. The method
2090 * is synchronized to ensure the flush is completed before a new event
2091 * can be posted to this queue.
2092 *
2093 * 7177040: The method couldn't be wholly synchronized because of calls
2094 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2095 * potentially lead to deadlock
2096 */
2097 public void flush() {
2098
2099 Thread newThread = Thread.currentThread();
2100
2101 try {
2102 EventQueueItem tempQueue;
2103 synchronized (this) {
2104 // Avoid method recursion
2105 if (newThread == flushThread) {
2106 return;
2107 }
2108 // Wait for other threads' flushing
2109 while (flushThread != null) {
2110 wait();
2111 }
2112 // Skip everything if queue is empty
2113 if (queueHead == null) {
2114 return;
2115 }
2116 // Remember flushing thread
2117 flushThread = newThread;
2118
2119 tempQueue = queueHead;
2120 queueHead = queueTail = null;
2121 }
2122 try {
2123 while (tempQueue != null) {
2124 eventQueue.postEvent(tempQueue.event);
2125 tempQueue = tempQueue.next;
2126 }
2127 }
2128 finally {
2129 // Only the flushing thread can get here
2130 synchronized (this) {
2131 // Forget flushing thread, inform other pending threads
2132 flushThread = null;
2133 notifyAll();
2134 }
2135 }
2136 }
2137 catch (InterruptedException e) {
2138 // Couldn't allow exception go up, so at least recover the flag
2139 newThread.interrupt();
2140 }
2141 }
2142
2143 /*
2144 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2145 */
2146 void postEvent(AWTEvent event) {
2147 EventQueueItem item = new EventQueueItem(event);
2148
2149 synchronized (this) {
2150 if (queueHead == null) {
2151 queueHead = queueTail = item;
2152 } else {
2153 queueTail.next = item;
2154 queueTail = item;
2155 }
2156 }
2157 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2158 }
2159 } // class PostEventQueue