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.security.PrivilegedAction;
44 import java.util.*;
45 import java.util.concurrent.TimeUnit;
46 import java.util.concurrent.locks.Condition;
47 import java.util.concurrent.locks.Lock;
48 import java.util.concurrent.locks.ReentrantLock;
49
50 import sun.awt.datatransfer.DataTransferer;
51 import sun.util.logging.PlatformLogger;
52 import sun.misc.SoftCache;
53 import sun.font.FontDesignMetrics;
54 import sun.awt.im.InputContext;
55 import sun.awt.image.*;
56 import sun.security.action.GetPropertyAction;
57 import sun.security.action.GetBooleanAction;
58 import java.lang.reflect.InvocationTargetException;
59 import java.security.AccessController;
60
61 public abstract class SunToolkit extends Toolkit
62 implements WindowClosingSupport, WindowClosingListener,
63 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
64
65 // 8014718: logging has been removed from SunToolkit
66
67 /* Load debug settings for native code */
68 static {
69 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
70 DebugSettings.init();
71 }
72 };
73
74 /**
75 * Special mask for the UngrabEvent events, in addition to the
76 * public masks defined in AWTEvent. Should be used as the mask
77 * value for Toolkit.addAWTEventListener.
78 */
79 public static final int GRAB_EVENT_MASK = 0x80000000;
80
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 /**
105 * Creates and initializes EventQueue instance for the specified
106 * AppContext.
107 * Note that event queue must be created from createNewAppContext()
108 * only in order to ensure that EventQueue constructor obtains
109 * the correct AppContext.
110 * @param appContext AppContext to associate with the event queue
111 */
112 private static void initEQ(AppContext appContext) {
113 EventQueue eventQueue;
114
115 String eqName = System.getProperty("AWT.EventQueueClass",
116 "java.awt.EventQueue");
117
118 try {
119 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
120 } catch (Exception e) {
121 e.printStackTrace();
122 System.err.println("Failed loading " + eqName + ": " + e);
123 eventQueue = new EventQueue();
124 }
125 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
126
127 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
128 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
129 }
130
131 public SunToolkit() {
132 }
133
134 public boolean useBufferPerWindow() {
135 return false;
136 }
137
138 public abstract WindowPeer createWindow(Window target)
139 throws HeadlessException;
140
141 public abstract FramePeer createFrame(Frame target)
142 throws HeadlessException;
143
144 public abstract FramePeer createLightweightFrame(LightweightFrame target)
145 throws HeadlessException;
146
147 public abstract DialogPeer createDialog(Dialog target)
148 throws HeadlessException;
149
150 public abstract ButtonPeer createButton(Button target)
151 throws HeadlessException;
152
153 public abstract TextFieldPeer createTextField(TextField target)
154 throws HeadlessException;
155
156 public abstract ChoicePeer createChoice(Choice target)
157 throws HeadlessException;
158
159 public abstract LabelPeer createLabel(Label target)
160 throws HeadlessException;
161
162 public abstract ListPeer createList(java.awt.List target)
163 throws HeadlessException;
164
165 public abstract CheckboxPeer createCheckbox(Checkbox target)
166 throws HeadlessException;
167
168 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
169 throws HeadlessException;
170
171 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
172 throws HeadlessException;
173
174 public abstract TextAreaPeer createTextArea(TextArea target)
175 throws HeadlessException;
176
177 public abstract FileDialogPeer createFileDialog(FileDialog target)
178 throws HeadlessException;
179
180 public abstract MenuBarPeer createMenuBar(MenuBar target)
181 throws HeadlessException;
182
183 public abstract MenuPeer createMenu(Menu target)
184 throws HeadlessException;
185
186 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
187 throws HeadlessException;
188
189 public abstract MenuItemPeer createMenuItem(MenuItem target)
190 throws HeadlessException;
191
192 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
193 CheckboxMenuItem target)
194 throws HeadlessException;
195
196 public abstract DragSourceContextPeer createDragSourceContextPeer(
197 DragGestureEvent dge)
198 throws InvalidDnDOperationException;
199
200 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
201 throws HeadlessException, AWTException;
202
203 public abstract SystemTrayPeer createSystemTray(SystemTray target);
204
205 public abstract boolean isTraySupported();
206
207 public abstract DataTransferer getDataTransferer();
208
209 @SuppressWarnings("deprecation")
210 public abstract FontPeer getFontPeer(String name, int style);
211
212 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
213 throws AWTException;
214
215 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
216 throws HeadlessException;
217
218 /**
219 * The AWT lock is typically only used on Unix platforms to synchronize
220 * access to Xlib, OpenGL, etc. However, these methods are implemented
221 * in SunToolkit so that they can be called from shared code (e.g.
222 * from the OGL pipeline) or from the X11 pipeline regardless of whether
223 * XToolkit or MToolkit is currently in use. There are native macros
224 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
225 * methods is changed, make sure it is compatible with the native macros.
226 *
227 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
228 * used in place of:
229 * synchronized (getAWTLock()) {
230 * ...
231 * }
232 *
233 * By factoring these methods out specially, we are able to change the
234 * implementation of these methods (e.g. use more advanced locking
235 * mechanisms) without impacting calling code.
236 *
237 * Sample usage:
238 * private void doStuffWithXlib() {
239 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
240 * SunToolkit.awtLock();
241 * try {
242 * ...
243 * XlibWrapper.XDoStuff();
244 * } finally {
245 * SunToolkit.awtUnlock();
246 * }
247 * }
248 */
249
250 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
251 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
252
253 public static final void awtLock() {
254 AWT_LOCK.lock();
255 }
256
257 public static final boolean awtTryLock() {
258 return AWT_LOCK.tryLock();
259 }
260
261 public static final void awtUnlock() {
262 AWT_LOCK.unlock();
263 }
264
265 public static final void awtLockWait()
266 throws InterruptedException
267 {
268 AWT_LOCK_COND.await();
269 }
270
271 public static final void awtLockWait(long timeout)
272 throws InterruptedException
273 {
274 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
275 }
276
277 public static final void awtLockNotify() {
278 AWT_LOCK_COND.signal();
279 }
280
281 public static final void awtLockNotifyAll() {
282 AWT_LOCK_COND.signalAll();
283 }
284
285 public static final boolean isAWTLockHeldByCurrentThread() {
286 return AWT_LOCK.isHeldByCurrentThread();
287 }
288
289 /*
290 * Create a new AppContext, along with its EventQueue, for a
291 * new ThreadGroup. Browser code, for example, would use this
292 * method to create an AppContext & EventQueue for an Applet.
293 */
294 public static AppContext createNewAppContext() {
295 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
296 return createNewAppContext(threadGroup);
297 }
298
299 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
300 // Create appContext before initialization of EventQueue, so all
301 // the calls to AppContext.getAppContext() from EventQueue ctor
302 // return correct values
303 AppContext appContext = new AppContext(threadGroup);
304 initEQ(appContext);
305
306 return appContext;
307 }
308
309 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
310 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
311 }
312
313 /*
314 * Fetch the peer associated with the given target (as specified
315 * in the peer creation method). This can be used to determine
316 * things like what the parent peer is. If the target is null
317 * or the target can't be found (either because the a peer was
318 * never created for it or the peer was disposed), a null will
319 * be returned.
320 */
321 protected static Object targetToPeer(Object target) {
322 if (target != null && !GraphicsEnvironment.isHeadless()) {
323 return AWTAutoShutdown.getInstance().getPeer(target);
324 }
325 return null;
326 }
327
328 protected static void targetCreatedPeer(Object target, Object peer) {
329 if (target != null && peer != null &&
330 !GraphicsEnvironment.isHeadless())
331 {
332 AWTAutoShutdown.getInstance().registerPeer(target, peer);
333 }
334 }
335
336 protected static void targetDisposedPeer(Object target, Object peer) {
337 if (target != null && peer != null &&
338 !GraphicsEnvironment.isHeadless())
339 {
340 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
341 }
342 }
343
344 // Maps from non-Component/MenuComponent to AppContext.
345 // WeakHashMap<Component,AppContext>
346 private static final Map<Object, AppContext> appContextMap =
347 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
348
349 /**
350 * Sets the appContext field of target. If target is not a Component or
351 * MenuComponent, this returns false.
352 */
353 private static boolean setAppContext(Object target,
354 AppContext context) {
355 if (target instanceof Component) {
356 AWTAccessor.getComponentAccessor().
357 setAppContext((Component)target, context);
358 } else if (target instanceof MenuComponent) {
359 AWTAccessor.getMenuComponentAccessor().
360 setAppContext((MenuComponent)target, context);
361 } else {
362 return false;
363 }
364 return true;
365 }
366
367 /**
368 * Returns the appContext field for target. If target is not a
369 * Component or MenuComponent this returns null.
370 */
371 private static AppContext getAppContext(Object target) {
372 if (target instanceof Component) {
373 return AWTAccessor.getComponentAccessor().
374 getAppContext((Component)target);
375 } else if (target instanceof MenuComponent) {
376 return AWTAccessor.getMenuComponentAccessor().
377 getAppContext((MenuComponent)target);
378 } else {
379 return null;
380 }
381 }
382
383 /*
384 * Fetch the AppContext associated with the given target.
385 * This can be used to determine things like which EventQueue
386 * to use for posting events to a Component. If the target is
387 * null or the target can't be found, a null with be returned.
388 */
389 public static AppContext targetToAppContext(Object target) {
390 if (target == null || GraphicsEnvironment.isHeadless()) {
391 return null;
392 }
393 AppContext context = getAppContext(target);
394 if (context == null) {
395 // target is not a Component/MenuComponent, try the
396 // appContextMap.
397 context = appContextMap.get(target);
398 }
399 return context;
400 }
401
402 /**
403 * Sets the synchronous status of focus requests on lightweight
404 * components in the specified window to the specified value.
405 * If the boolean parameter is <code>true</code> then the focus
406 * requests on lightweight components will be performed
407 * synchronously, if it is <code>false</code>, then asynchronously.
408 * By default, all windows have their lightweight request status
409 * set to asynchronous.
410 * <p>
411 * The application can only set the status of lightweight focus
412 * requests to synchronous for any of its windows if it doesn't
413 * perform focus transfers between different heavyweight containers.
414 * In this case the observable focus behaviour is the same as with
415 * asynchronous status.
416 * <p>
417 * If the application performs focus transfer between different
418 * heavyweight containers and sets the lightweight focus request
419 * status to synchronous for any of its windows, then further focus
420 * behaviour is unspecified.
421 * <p>
422 * @param w window for which the lightweight focus request status
423 * should be set
424 * @param status the value of lightweight focus request status
425 */
426
427 public static void setLWRequestStatus(Window changed,boolean status){
428 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
429 };
430
431 public static void checkAndSetPolicy(Container cont) {
432 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
433 getCurrentKeyboardFocusManager().
434 getDefaultFocusTraversalPolicy();
435
436 cont.setFocusTraversalPolicy(defaultPolicy);
437 }
438
439 private static FocusTraversalPolicy createLayoutPolicy() {
440 FocusTraversalPolicy policy = null;
441 try {
442 Class<?> layoutPolicyClass =
443 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
444 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
445 }
446 catch (ClassNotFoundException e) {
447 assert false;
448 }
449 catch (InstantiationException e) {
450 assert false;
451 }
452 catch (IllegalAccessException e) {
453 assert false;
454 }
455
456 return policy;
457 }
458
459 /*
460 * Insert a mapping from target to AppContext, for later retrieval
461 * via targetToAppContext() above.
462 */
463 public static void insertTargetMapping(Object target, AppContext appContext) {
464 if (!GraphicsEnvironment.isHeadless()) {
465 if (!setAppContext(target, appContext)) {
466 // Target is not a Component/MenuComponent, use the private Map
467 // instead.
468 appContextMap.put(target, appContext);
469 }
470 }
471 }
472
473 /*
474 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
475 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
476 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
477 * not be called under another lock since it locks the EventQueue.
478 * See bugids 4632918, 4526597.
479 */
480 public static void postEvent(AppContext appContext, AWTEvent event) {
481 if (event == null) {
482 throw new NullPointerException();
483 }
484
485 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
486 if (sea != null && sea.isSequencedEvent(event)) {
487 AWTEvent nested = sea.getNested(event);
488 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
489 nested instanceof TimedWindowEvent)
490 {
491 TimedWindowEvent twe = (TimedWindowEvent)nested;
492 ((SunToolkit)Toolkit.getDefaultToolkit()).
493 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
494 }
495 }
496
497 // All events posted via this method are system-generated.
498 // Placing the following call here reduces considerably the
499 // number of places throughout the toolkit that would
500 // otherwise have to be modified to precisely identify
501 // system-generated events.
502 setSystemGenerated(event);
503 AppContext eventContext = targetToAppContext(event.getSource());
504 if (eventContext != null && !eventContext.equals(appContext)) {
505 throw new RuntimeException("Event posted on wrong app context : " + event);
506 }
507 PostEventQueue postEventQueue =
508 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
509 if (postEventQueue != null) {
510 postEventQueue.postEvent(event);
511 }
512 }
513
514 /*
515 * Post AWTEvent of high priority.
516 */
517 public static void postPriorityEvent(final AWTEvent e) {
518 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
519 public void run() {
520 AWTAccessor.getAWTEventAccessor().setPosted(e);
521 ((Component)e.getSource()).dispatchEvent(e);
522 }
523 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
524 postEvent(targetToAppContext(e.getSource()), pe);
525 }
526
527 /*
528 * Flush any pending events which haven't been posted to the AWT
529 * EventQueue yet.
530 */
531 public static void flushPendingEvents() {
532 AppContext appContext = AppContext.getAppContext();
533 flushPendingEvents(appContext);
534 }
535
536 /*
537 * Flush the PostEventQueue for the right AppContext.
538 * The default flushPendingEvents only flushes the thread-local context,
539 * which is not always correct, c.f. 3746956
540 */
541 public static void flushPendingEvents(AppContext appContext) {
542 PostEventQueue postEventQueue =
543 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
544 if (postEventQueue != null) {
545 postEventQueue.flush();
546 }
547 }
548
549 /*
550 * Execute a chunk of code on the Java event handler thread for the
551 * given target. Does not wait for the execution to occur before
552 * returning to the caller.
553 */
554 public static void executeOnEventHandlerThread(Object target,
555 Runnable runnable) {
556 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
557 }
558
559 /*
560 * Fixed 5064013: the InvocationEvent time should be equals
561 * the time of the ActionEvent
562 */
563 @SuppressWarnings("serial")
564 public static void executeOnEventHandlerThread(Object target,
565 Runnable runnable,
566 final long when) {
567 executeOnEventHandlerThread(
568 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
569 public long getWhen() {
570 return when;
571 }
572 });
573 }
574
575 /*
576 * Execute a chunk of code on the Java event handler thread for the
577 * given target. Does not wait for the execution to occur before
578 * returning to the caller.
579 */
580 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
581 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
582 }
583
584 /*
585 * Execute a chunk of code on the Java event handler thread. The
586 * method takes into account provided AppContext and sets
587 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
588 * event. See 6451487 for detailes.
589 * Does not wait for the execution to occur before returning to
590 * the caller.
591 */
592 public static void invokeLaterOnAppContext(
593 AppContext appContext, Runnable dispatcher)
594 {
595 postEvent(appContext,
596 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
597 PeerEvent.PRIORITY_EVENT));
598 }
599
600 /*
601 * Execute a chunk of code on the Java event handler thread for the
602 * given target. Waits for the execution to occur before returning
603 * to the caller.
604 */
605 public static void executeOnEDTAndWait(Object target, Runnable runnable)
606 throws InterruptedException, InvocationTargetException
607 {
608 if (EventQueue.isDispatchThread()) {
609 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
610 }
611
612 class AWTInvocationLock {}
613 Object lock = new AWTInvocationLock();
614
615 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
616
617 synchronized (lock) {
618 executeOnEventHandlerThread(event);
619 while(!event.isDispatched()) {
620 lock.wait();
621 }
622 }
623
624 Throwable eventThrowable = event.getThrowable();
625 if (eventThrowable != null) {
626 throw new InvocationTargetException(eventThrowable);
627 }
628 }
629
630 /*
631 * Returns true if the calling thread is the event dispatch thread
632 * contained within AppContext which associated with the given target.
633 * Use this call to ensure that a given task is being executed
634 * (or not being) on the event dispatch thread for the given target.
635 */
636 public static boolean isDispatchThreadForAppContext(Object target) {
637 AppContext appContext = targetToAppContext(target);
638 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
639
640 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
641 return accessor.isDispatchThreadImpl(eq);
642 }
643
644 public Dimension getScreenSize() {
645 return new Dimension(getScreenWidth(), getScreenHeight());
646 }
647 protected abstract int getScreenWidth();
648 protected abstract int getScreenHeight();
649
650 @SuppressWarnings("deprecation")
651 public FontMetrics getFontMetrics(Font font) {
652 return FontDesignMetrics.getMetrics(font);
653 }
654
655 @SuppressWarnings("deprecation")
656 public String[] getFontList() {
657 String[] hardwiredFontList = {
658 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
659 Font.DIALOG_INPUT
660
661 // -- Obsolete font names from 1.0.2. It was decided that
662 // -- getFontList should not return these old names:
663 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
664 };
665 return hardwiredFontList;
666 }
667
668 public PanelPeer createPanel(Panel target) {
669 return (PanelPeer)createComponent(target);
670 }
671
672 public CanvasPeer createCanvas(Canvas target) {
673 return (CanvasPeer)createComponent(target);
674 }
675
676 /**
677 * Disables erasing of background on the canvas before painting if
678 * this is supported by the current toolkit. It is recommended to
679 * call this method early, before the Canvas becomes displayable,
680 * because some Toolkit implementations do not support changing
681 * this property once the Canvas becomes displayable.
682 */
683 public void disableBackgroundErase(Canvas canvas) {
684 disableBackgroundEraseImpl(canvas);
685 }
686
687 /**
688 * Disables the native erasing of the background on the given
689 * component before painting if this is supported by the current
690 * toolkit. This only has an effect for certain components such as
691 * Canvas, Panel and Window. It is recommended to call this method
692 * early, before the Component becomes displayable, because some
693 * Toolkit implementations do not support changing this property
694 * once the Component becomes displayable.
695 */
696 public void disableBackgroundErase(Component component) {
697 disableBackgroundEraseImpl(component);
698 }
699
700 private void disableBackgroundEraseImpl(Component component) {
701 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
702 }
703
704 /**
705 * Returns the value of "sun.awt.noerasebackground" property. Default
706 * value is {@code false}.
707 */
708 public static boolean getSunAwtNoerasebackground() {
709 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
710 }
711
712 /**
713 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
714 * value is {@code false}.
715 */
716 public static boolean getSunAwtErasebackgroundonresize() {
717 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
718 }
719
720
721 static final SoftCache imgCache = new SoftCache();
722
723 static Image getImageFromHash(Toolkit tk, URL url) {
724 checkPermissions(url);
725 synchronized (imgCache) {
726 Image img = (Image)imgCache.get(url);
727 if (img == null) {
728 try {
729 img = tk.createImage(new URLImageSource(url));
730 imgCache.put(url, img);
731 } catch (Exception e) {
732 }
733 }
734 return img;
735 }
736 }
737
738 static Image getImageFromHash(Toolkit tk,
739 String filename) {
740 checkPermissions(filename);
741 synchronized (imgCache) {
742 Image img = (Image)imgCache.get(filename);
743 if (img == null) {
744 try {
745 img = tk.createImage(new FileImageSource(filename));
746 imgCache.put(filename, img);
747 } catch (Exception e) {
748 }
749 }
750 return img;
751 }
752 }
753
754 public Image getImage(String filename) {
755 return getImageFromHash(this, filename);
756 }
757
758 public Image getImage(URL url) {
759 return getImageFromHash(this, url);
760 }
761
762 protected Image getImageWithResolutionVariant(String fileName,
763 String resolutionVariantName) {
764 synchronized (imgCache) {
765 Image image = getImageFromHash(this, fileName);
766 if (image instanceof MultiResolutionImage) {
767 return image;
768 }
769 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
770 image = createImageWithResolutionVariant(image, resolutionVariant);
771 imgCache.put(fileName, image);
772 return image;
773 }
774 }
775
776 protected Image getImageWithResolutionVariant(URL url,
777 URL resolutionVariantURL) {
778 synchronized (imgCache) {
779 Image image = getImageFromHash(this, url);
780 if (image instanceof MultiResolutionImage) {
781 return image;
782 }
783 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
784 image = createImageWithResolutionVariant(image, resolutionVariant);
785 imgCache.put(url, image);
786 return image;
787 }
788 }
789
790
791 public Image createImage(String filename) {
792 checkPermissions(filename);
793 return createImage(new FileImageSource(filename));
794 }
795
796 public Image createImage(URL url) {
797 checkPermissions(url);
798 return createImage(new URLImageSource(url));
799 }
800
801 public Image createImage(byte[] data, int offset, int length) {
802 return createImage(new ByteArrayImageSource(data, offset, length));
803 }
804
805 public Image createImage(ImageProducer producer) {
806 return new ToolkitImage(producer);
807 }
808
809 public static Image createImageWithResolutionVariant(Image image,
810 Image resolutionVariant) {
811 return new MultiResolutionToolkitImage(image, resolutionVariant);
812 }
813
814 public int checkImage(Image img, int w, int h, ImageObserver o) {
815 if (!(img instanceof ToolkitImage)) {
816 return ImageObserver.ALLBITS;
817 }
818
819 ToolkitImage tkimg = (ToolkitImage)img;
820 int repbits;
821 if (w == 0 || h == 0) {
822 repbits = ImageObserver.ALLBITS;
823 } else {
824 repbits = tkimg.getImageRep().check(o);
825 }
826 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
827 }
828
829 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
830 if (w == 0 || h == 0) {
831 return true;
832 }
833
834 // Must be a ToolkitImage
835 if (!(img instanceof ToolkitImage)) {
836 return true;
837 }
838
839 ToolkitImage tkimg = (ToolkitImage)img;
840 if (tkimg.hasError()) {
841 if (o != null) {
842 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
843 -1, -1, -1, -1);
844 }
845 return false;
846 }
847 ImageRepresentation ir = tkimg.getImageRep();
848 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
849 }
850
851 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
852 ToolkitImage rvImage = getResolutionVariant(img);
853 int rvw = getRVSize(w);
854 int rvh = getRVSize(h);
855 // Ignore the resolution variant in case of error
856 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
857 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
858 getResolutionVariantObserver(
859 img, o, w, h, rvw, rvh, true));
860 }
861
862 private boolean prepareResolutionVariant(Image img, int w, int h,
863 ImageObserver o) {
864
865 ToolkitImage rvImage = getResolutionVariant(img);
866 int rvw = getRVSize(w);
867 int rvh = getRVSize(h);
868 // Ignore the resolution variant in case of error
869 return rvImage == null || rvImage.hasError() || prepareImage(
870 rvImage, rvw, rvh,
871 MultiResolutionToolkitImage.getResolutionVariantObserver(
872 img, o, w, h, rvw, rvh, true));
873 }
874
875 private static int getRVSize(int size){
876 return size == -1 ? -1 : size;
877 }
878
879 private static ToolkitImage getResolutionVariant(Image image) {
880 if (image instanceof MultiResolutionToolkitImage) {
881 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
882 getResolutionVariant();
883 if (resolutionVariant instanceof ToolkitImage) {
884 return (ToolkitImage) resolutionVariant;
885 }
886 }
887 return null;
888 }
889
890 protected static boolean imageCached(Object key) {
891 return imgCache.containsKey(key);
892 }
893
894 protected static boolean imageExists(String filename) {
895 checkPermissions(filename);
896 return filename != null && new File(filename).exists();
897 }
898
899 @SuppressWarnings("try")
900 protected static boolean imageExists(URL url) {
901 checkPermissions(url);
902 if (url != null) {
903 try (InputStream is = url.openStream()) {
904 return true;
905 }catch(IOException e){
906 return false;
907 }
908 }
909 return false;
910 }
911
912 private static void checkPermissions(String filename) {
913 SecurityManager security = System.getSecurityManager();
914 if (security != null) {
915 security.checkRead(filename);
916 }
917 }
918
919 private static void checkPermissions(URL url) {
920 SecurityManager sm = System.getSecurityManager();
921 if (sm != null) {
922 try {
923 java.security.Permission perm =
924 url.openConnection().getPermission();
925 if (perm != null) {
926 try {
927 sm.checkPermission(perm);
928 } catch (SecurityException se) {
929 // fallback to checkRead/checkConnect for pre 1.2
930 // security managers
931 if ((perm instanceof java.io.FilePermission) &&
932 perm.getActions().indexOf("read") != -1) {
933 sm.checkRead(perm.getName());
934 } else if ((perm instanceof
935 java.net.SocketPermission) &&
936 perm.getActions().indexOf("connect") != -1) {
937 sm.checkConnect(url.getHost(), url.getPort());
938 } else {
939 throw se;
940 }
941 }
942 }
943 } catch (java.io.IOException ioe) {
944 sm.checkConnect(url.getHost(), url.getPort());
945 }
946 }
947 }
948
949 /**
950 * Scans {@code imageList} for best-looking image of specified dimensions.
951 * Image can be scaled and/or padded with transparency.
952 */
953 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
954 if (width == 0 || height == 0) {
955 return null;
956 }
957 Image bestImage = null;
958 int bestWidth = 0;
959 int bestHeight = 0;
960 double bestSimilarity = 3; //Impossibly high value
961 double bestScaleFactor = 0;
962 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
963 //Iterate imageList looking for best matching image.
964 //'Similarity' measure is defined as good scale factor and small insets.
965 //best possible similarity is 0 (no scale, no insets).
966 //It's found while the experiments that good-looking result is achieved
967 //with scale factors x1, x3/4, x2/3, xN, x1/N.
968 Image im = i.next();
969 if (im == null) {
970 continue;
971 }
972 if (im instanceof ToolkitImage) {
973 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
974 ir.reconstruct(ImageObserver.ALLBITS);
975 }
976 int iw;
977 int ih;
978 try {
979 iw = im.getWidth(null);
980 ih = im.getHeight(null);
981 } catch (Exception e){
982 continue;
983 }
984 if (iw > 0 && ih > 0) {
985 //Calc scale factor
986 double scaleFactor = Math.min((double)width / (double)iw,
987 (double)height / (double)ih);
988 //Calculate scaled image dimensions
989 //adjusting scale factor to nearest "good" value
990 int adjw = 0;
991 int adjh = 0;
992 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
993 if (scaleFactor >= 2) {
994 //Need to enlarge image more than twice
995 //Round down scale factor to multiply by integer value
996 scaleFactor = Math.floor(scaleFactor);
997 adjw = iw * (int)scaleFactor;
998 adjh = ih * (int)scaleFactor;
999 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1000 } else if (scaleFactor >= 1) {
1001 //Don't scale
1002 scaleFactor = 1.0;
1003 adjw = iw;
1004 adjh = ih;
1005 scaleMeasure = 0;
1006 } else if (scaleFactor >= 0.75) {
1007 //Multiply by 3/4
1008 scaleFactor = 0.75;
1009 adjw = iw * 3 / 4;
1010 adjh = ih * 3 / 4;
1011 scaleMeasure = 0.3;
1012 } else if (scaleFactor >= 0.6666) {
1013 //Multiply by 2/3
1014 scaleFactor = 0.6666;
1015 adjw = iw * 2 / 3;
1016 adjh = ih * 2 / 3;
1017 scaleMeasure = 0.33;
1018 } else {
1019 //Multiply size by 1/scaleDivider
1020 //where scaleDivider is minimum possible integer
1021 //larger than 1/scaleFactor
1022 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1023 scaleFactor = 1.0 / scaleDivider;
1024 adjw = (int)Math.round((double)iw / scaleDivider);
1025 adjh = (int)Math.round((double)ih / scaleDivider);
1026 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1027 }
1028 double similarity = ((double)width - (double)adjw) / (double)width +
1029 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1030 scaleMeasure; //Large rescale is bad
1031 if (similarity < bestSimilarity) {
1032 bestSimilarity = similarity;
1033 bestScaleFactor = scaleFactor;
1034 bestImage = im;
1035 bestWidth = adjw;
1036 bestHeight = adjh;
1037 }
1038 if (similarity == 0) break;
1039 }
1040 }
1041 if (bestImage == null) {
1042 //No images were found, possibly all are broken
1043 return null;
1044 }
1045 BufferedImage bimage =
1046 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1047 Graphics2D g = bimage.createGraphics();
1048 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1049 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1050 try {
1051 int x = (width - bestWidth) / 2;
1052 int y = (height - bestHeight) / 2;
1053 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1054 } finally {
1055 g.dispose();
1056 }
1057 return bimage;
1058 }
1059
1060 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1061 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1062 if (bimage == null) {
1063 return null;
1064 }
1065 Raster raster = bimage.getRaster();
1066 DataBuffer buffer = raster.getDataBuffer();
1067 return (DataBufferInt)buffer;
1068 }
1069
1070 protected EventQueue getSystemEventQueueImpl() {
1071 return getSystemEventQueueImplPP();
1072 }
1073
1074 // Package private implementation
1075 static EventQueue getSystemEventQueueImplPP() {
1076 return getSystemEventQueueImplPP(AppContext.getAppContext());
1077 }
1078
1079 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1080 EventQueue theEventQueue =
1081 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1082 return theEventQueue;
1083 }
1084
1085 /**
1086 * Give native peers the ability to query the native container
1087 * given a native component (eg the direct parent may be lightweight).
1088 */
1089 public static Container getNativeContainer(Component c) {
1090 return Toolkit.getNativeContainer(c);
1091 }
1092
1093 /**
1094 * Gives native peers the ability to query the closest HW component.
1095 * If the given component is heavyweight, then it returns this. Otherwise,
1096 * it goes one level up in the hierarchy and tests next component.
1097 */
1098 public static Component getHeavyweightComponent(Component c) {
1099 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1100 c = AWTAccessor.getComponentAccessor().getParent(c);
1101 }
1102 return c;
1103 }
1104
1105 /**
1106 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1107 */
1108 public int getFocusAcceleratorKeyMask() {
1109 return InputEvent.ALT_MASK;
1110 }
1111
1112 /**
1113 * Tests whether specified key modifiers mask can be used to enter a printable
1114 * character. This is a default implementation of this method, which reflects
1115 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1116 * characters from the extended character set (like euro sign or math symbols)
1117 */
1118 public boolean isPrintableCharacterModifiersMask(int mods) {
1119 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1120 }
1121
1122 /**
1123 * Returns whether popup is allowed to be shown above the task bar.
1124 * This is a default implementation of this method, which checks
1125 * corresponding security permission.
1126 */
1127 public boolean canPopupOverlapTaskBar() {
1128 boolean result = true;
1129 try {
1130 SecurityManager sm = System.getSecurityManager();
1131 if (sm != null) {
1132 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1133 }
1134 } catch (SecurityException se) {
1135 // There is no permission to show popups over the task bar
1136 result = false;
1137 }
1138 return result;
1139 }
1140
1141 /**
1142 * Returns a new input method window, with behavior as specified in
1143 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1144 * If the inputContext is not null, the window should return it from its
1145 * getInputContext() method. The window needs to implement
1146 * sun.awt.im.InputMethodWindow.
1147 * <p>
1148 * SunToolkit subclasses can override this method to return better input
1149 * method windows.
1150 */
1151 public Window createInputMethodWindow(String title, InputContext context) {
1152 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1153 }
1154
1155 /**
1156 * Returns whether enableInputMethods should be set to true for peered
1157 * TextComponent instances on this platform. False by default.
1158 */
1159 public boolean enableInputMethodsForTextComponent() {
1160 return false;
1161 }
1162
1163 private static Locale startupLocale = null;
1164
1165 /**
1166 * Returns the locale in which the runtime was started.
1167 */
1168 public static Locale getStartupLocale() {
1169 if (startupLocale == null) {
1170 String language, region, country, variant;
1171 language = AccessController.doPrivileged(
1172 new GetPropertyAction("user.language", "en"));
1173 // for compatibility, check for old user.region property
1174 region = AccessController.doPrivileged(
1175 new GetPropertyAction("user.region"));
1176 if (region != null) {
1177 // region can be of form country, country_variant, or _variant
1178 int i = region.indexOf('_');
1179 if (i >= 0) {
1180 country = region.substring(0, i);
1181 variant = region.substring(i + 1);
1182 } else {
1183 country = region;
1184 variant = "";
1185 }
1186 } else {
1187 country = AccessController.doPrivileged(
1188 new GetPropertyAction("user.country", ""));
1189 variant = AccessController.doPrivileged(
1190 new GetPropertyAction("user.variant", ""));
1191 }
1192 startupLocale = new Locale(language, country, variant);
1193 }
1194 return startupLocale;
1195 }
1196
1197 /**
1198 * Returns the default keyboard locale of the underlying operating system
1199 */
1200 public Locale getDefaultKeyboardLocale() {
1201 return getStartupLocale();
1202 }
1203
1204 // Support for window closing event notifications
1205 private transient WindowClosingListener windowClosingListener = null;
1206 /**
1207 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1208 */
1209 public WindowClosingListener getWindowClosingListener() {
1210 return windowClosingListener;
1211 }
1212 /**
1213 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1214 */
1215 public void setWindowClosingListener(WindowClosingListener wcl) {
1216 windowClosingListener = wcl;
1217 }
1218
1219 /**
1220 * @see sun.awt.WindowClosingListener#windowClosingNotify
1221 */
1222 public RuntimeException windowClosingNotify(WindowEvent event) {
1223 if (windowClosingListener != null) {
1224 return windowClosingListener.windowClosingNotify(event);
1225 } else {
1226 return null;
1227 }
1228 }
1229 /**
1230 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1231 */
1232 public RuntimeException windowClosingDelivered(WindowEvent event) {
1233 if (windowClosingListener != null) {
1234 return windowClosingListener.windowClosingDelivered(event);
1235 } else {
1236 return null;
1237 }
1238 }
1239
1240 private static DefaultMouseInfoPeer mPeer = null;
1241
1242 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1243 if (mPeer == null) {
1244 mPeer = new DefaultMouseInfoPeer();
1245 }
1246 return mPeer;
1247 }
1248
1249
1250 /**
1251 * Returns whether default toolkit needs the support of the xembed
1252 * from embedding host(if any).
1253 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1254 */
1255 public static boolean needsXEmbed() {
1256 String noxembed = AccessController.
1257 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1258 if ("true".equals(noxembed)) {
1259 return false;
1260 }
1261
1262 Toolkit tk = Toolkit.getDefaultToolkit();
1263 if (tk instanceof SunToolkit) {
1264 // SunToolkit descendants should override this method to specify
1265 // concrete behavior
1266 return ((SunToolkit)tk).needsXEmbedImpl();
1267 } else {
1268 // Non-SunToolkit doubtly might support XEmbed
1269 return false;
1270 }
1271 }
1272
1273 /**
1274 * Returns whether this toolkit needs the support of the xembed
1275 * from embedding host(if any).
1276 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1277 */
1278 protected boolean needsXEmbedImpl() {
1279 return false;
1280 }
1281
1282 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1283
1284 /**
1285 * Returns whether the XEmbed server feature is requested by
1286 * developer. If true, Toolkit should return an
1287 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1288 */
1289 protected final boolean isXEmbedServerRequested() {
1290 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1291 }
1292
1293 /**
1294 * Returns whether the modal exclusion API is supported by the current toolkit.
1295 * When it isn't supported, calling <code>setModalExcluded</code> has no
1296 * effect, and <code>isModalExcluded</code> returns false for all windows.
1297 *
1298 * @return true if modal exclusion is supported by the toolkit, false otherwise
1299 *
1300 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1301 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1302 *
1303 * @since 1.5
1304 */
1305 public static boolean isModalExcludedSupported()
1306 {
1307 Toolkit tk = Toolkit.getDefaultToolkit();
1308 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1309 }
1310 /*
1311 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1312 *
1313 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1314 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1315 *
1316 * @since 1.5
1317 */
1318 protected boolean isModalExcludedSupportedImpl()
1319 {
1320 return false;
1321 }
1322
1323 /*
1324 * Sets this window to be excluded from being modally blocked. When the
1325 * toolkit supports modal exclusion and this method is called, input
1326 * events, focus transfer and z-order will continue to work for the
1327 * window, it's owned windows and child components, even in the
1328 * presence of a modal dialog.
1329 * For details on which <code>Window</code>s are normally blocked
1330 * by modal dialog, see {@link java.awt.Dialog}.
1331 * Invoking this method when the modal exclusion API is not supported by
1332 * the current toolkit has no effect.
1333 * @param window Window to be marked as not modally blocked
1334 * @see java.awt.Dialog
1335 * @see java.awt.Dialog#setModal(boolean)
1336 * @see sun.awt.SunToolkit#isModalExcludedSupported
1337 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1338 */
1339 public static void setModalExcluded(Window window)
1340 {
1341 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1342 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1343 }
1344 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1345 }
1346
1347 /*
1348 * Returns whether the specified window is blocked by modal dialogs.
1349 * If the modal exclusion API isn't supported by the current toolkit,
1350 * it returns false for all windows.
1351 *
1352 * @param window Window to test for modal exclusion
1353 *
1354 * @return true if the window is modal excluded, false otherwise. If
1355 * the modal exclusion isn't supported by the current Toolkit, false
1356 * is returned
1357 *
1358 * @see sun.awt.SunToolkit#isModalExcludedSupported
1359 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1360 *
1361 * @since 1.5
1362 */
1363 public static boolean isModalExcluded(Window window)
1364 {
1365 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1366 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1367 }
1368 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1369 }
1370
1371 /**
1372 * Overridden in XToolkit and WToolkit
1373 */
1374 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1375 return (modalityType == Dialog.ModalityType.MODELESS) ||
1376 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1377 }
1378
1379 /**
1380 * Overridden in XToolkit and WToolkit
1381 */
1382 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1383 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1384 }
1385
1386 ///////////////////////////////////////////////////////////////////////////
1387 //
1388 // The following is used by the Java Plug-in to coordinate dialog modality
1389 // between containing applications (browsers, ActiveX containers etc) and
1390 // the AWT.
1391 //
1392 ///////////////////////////////////////////////////////////////////////////
1393
1394 private ModalityListenerList modalityListeners = new ModalityListenerList();
1395
1396 public void addModalityListener(ModalityListener listener) {
1397 modalityListeners.add(listener);
1398 }
1399
1400 public void removeModalityListener(ModalityListener listener) {
1401 modalityListeners.remove(listener);
1402 }
1403
1404 public void notifyModalityPushed(Dialog dialog) {
1405 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1406 }
1407
1408 public void notifyModalityPopped(Dialog dialog) {
1409 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1410 }
1411
1412 final void notifyModalityChange(int id, Dialog source) {
1413 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1414 ev.dispatch();
1415 }
1416
1417 static class ModalityListenerList implements ModalityListener {
1418
1419 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1420
1421 void add(ModalityListener listener) {
1422 listeners.addElement(listener);
1423 }
1424
1425 void remove(ModalityListener listener) {
1426 listeners.removeElement(listener);
1427 }
1428
1429 public void modalityPushed(ModalityEvent ev) {
1430 Iterator<ModalityListener> it = listeners.iterator();
1431 while (it.hasNext()) {
1432 it.next().modalityPushed(ev);
1433 }
1434 }
1435
1436 public void modalityPopped(ModalityEvent ev) {
1437 Iterator<ModalityListener> it = listeners.iterator();
1438 while (it.hasNext()) {
1439 it.next().modalityPopped(ev);
1440 }
1441 }
1442 } // end of class ModalityListenerList
1443
1444 ///////////////////////////////////////////////////////////////////////////
1445 // End Plug-in code
1446 ///////////////////////////////////////////////////////////////////////////
1447
1448 public static boolean isLightweightOrUnknown(Component comp) {
1449 if (comp.isLightweight()
1450 || !(getDefaultToolkit() instanceof SunToolkit))
1451 {
1452 return true;
1453 }
1454 return !(comp instanceof Button
1455 || comp instanceof Canvas
1456 || comp instanceof Checkbox
1457 || comp instanceof Choice
1458 || comp instanceof Label
1459 || comp instanceof java.awt.List
1460 || comp instanceof Panel
1461 || comp instanceof Scrollbar
1462 || comp instanceof ScrollPane
1463 || comp instanceof TextArea
1464 || comp instanceof TextField
1465 || comp instanceof Window);
1466 }
1467
1468 @SuppressWarnings("serial")
1469 public static class OperationTimedOut extends RuntimeException {
1470 public OperationTimedOut(String msg) {
1471 super(msg);
1472 }
1473 public OperationTimedOut() {
1474 }
1475 }
1476
1477 @SuppressWarnings("serial")
1478 public static class InfiniteLoop extends RuntimeException {
1479 }
1480
1481 @SuppressWarnings("serial")
1482 public static class IllegalThreadException extends RuntimeException {
1483 public IllegalThreadException(String msg) {
1484 super(msg);
1485 }
1486 public IllegalThreadException() {
1487 }
1488 }
1489
1490 public static final int DEFAULT_WAIT_TIME = 10000;
1491 private static final int MAX_ITERS = 20;
1492 private static final int MIN_ITERS = 0;
1493 private static final int MINIMAL_EDELAY = 0;
1494
1495 /**
1496 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1497 */
1498 public void realSync() throws OperationTimedOut, InfiniteLoop {
1499 realSync(DEFAULT_WAIT_TIME);
1500 }
1501
1502 /**
1503 * Forces toolkit to synchronize with the native windowing
1504 * sub-system, flushing all pending work and waiting for all the
1505 * events to be processed. This method guarantees that after
1506 * return no additional Java events will be generated, unless
1507 * cause by user. Obviously, the method cannot be used on the
1508 * event dispatch thread (EDT). In case it nevertheless gets
1509 * invoked on this thread, the method throws the
1510 * IllegalThreadException runtime exception.
1511 *
1512 * <p> This method allows to write tests without explicit timeouts
1513 * or wait for some event. Example:
1514 * <code>
1515 * Frame f = ...;
1516 * f.setVisible(true);
1517 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1518 * </code>
1519 *
1520 * <p> After realSync, <code>f</code> will be completely visible
1521 * on the screen, its getLocationOnScreen will be returning the
1522 * right result and it will be the focus owner.
1523 *
1524 * <p> Another example:
1525 * <code>
1526 * b.requestFocus();
1527 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1528 * </code>
1529 *
1530 * <p> After realSync, <code>b</code> will be focus owner.
1531 *
1532 * <p> Notice that realSync isn't guaranteed to work if recurring
1533 * actions occur, such as if during processing of some event
1534 * another request which may generate some events occurs. By
1535 * default, sync tries to perform as much as {@value MAX_ITERS}
1536 * cycles of event processing, allowing for roughly {@value
1537 * MAX_ITERS} additional requests.
1538 *
1539 * <p> For example, requestFocus() generates native request, which
1540 * generates one or two Java focus events, which then generate a
1541 * serie of paint events, a serie of Java focus events, which then
1542 * generate a serie of paint events which then are processed -
1543 * three cycles, minimum.
1544 *
1545 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1546 */
1547 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1548 {
1549 if (EventQueue.isDispatchThread()) {
1550 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1551 }
1552 int bigLoop = 0;
1553 do {
1554 // Let's do sync first
1555 sync();
1556
1557 // During the wait process, when we were processing incoming
1558 // events, we could have made some new request, which can
1559 // generate new events. Example: MapNotify/XSetInputFocus.
1560 // Therefore, we dispatch them as long as there is something
1561 // to dispatch.
1562 int iters = 0;
1563 while (iters < MIN_ITERS) {
1564 syncNativeQueue(timeout);
1565 iters++;
1566 }
1567 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1568 iters++;
1569 }
1570 if (iters >= MAX_ITERS) {
1571 throw new InfiniteLoop();
1572 }
1573
1574 // native requests were dispatched by X/Window Manager or Windows
1575 // Moreover, we processed them all on Toolkit thread
1576 // Now wait while EDT processes them.
1577 //
1578 // During processing of some events (focus, for example),
1579 // some other events could have been generated. So, after
1580 // waitForIdle, we may end up with full EventQueue
1581 iters = 0;
1582 while (iters < MIN_ITERS) {
1583 waitForIdle(timeout);
1584 iters++;
1585 }
1586 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1587 iters++;
1588 }
1589 if (iters >= MAX_ITERS) {
1590 throw new InfiniteLoop();
1591 }
1592
1593 bigLoop++;
1594 // Again, for Java events, it was simple to check for new Java
1595 // events by checking event queue, but what if Java events
1596 // resulted in native requests? Therefor, check native events again.
1597 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1598 }
1599
1600 /**
1601 * Platform toolkits need to implement this method to perform the
1602 * sync of the native queue. The method should wait until native
1603 * requests are processed, all native events are processed and
1604 * corresponding Java events are generated. Should return
1605 * <code>true</code> if some events were processed,
1606 * <code>false</code> otherwise.
1607 */
1608 protected abstract boolean syncNativeQueue(final long timeout);
1609
1610 private boolean eventDispatched = false;
1611 private boolean queueEmpty = false;
1612 private final Object waitLock = "Wait Lock";
1613
1614 private boolean isEQEmpty() {
1615 EventQueue queue = getSystemEventQueueImpl();
1616 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1617 }
1618
1619 /**
1620 * Waits for the Java event queue to empty. Ensures that all
1621 * events are processed (including paint events), and that if
1622 * recursive events were generated, they are also processed.
1623 * Should return <code>true</code> if more processing is
1624 * necessary, <code>false</code> otherwise.
1625 */
1626 @SuppressWarnings("serial")
1627 protected final boolean waitForIdle(final long timeout) {
1628 flushPendingEvents();
1629 boolean queueWasEmpty = isEQEmpty();
1630 queueEmpty = false;
1631 eventDispatched = false;
1632 synchronized(waitLock) {
1633 postEvent(AppContext.getAppContext(),
1634 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1635 public void dispatch() {
1636 // Here we block EDT. It could have some
1637 // events, it should have dispatched them by
1638 // now. So native requests could have been
1639 // generated. First, dispatch them. Then,
1640 // flush Java events again.
1641 int iters = 0;
1642 while (iters < MIN_ITERS) {
1643 syncNativeQueue(timeout);
1644 iters++;
1645 }
1646 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1647 iters++;
1648 }
1649 flushPendingEvents();
1650
1651 synchronized(waitLock) {
1652 queueEmpty = isEQEmpty();
1653 eventDispatched = true;
1654 waitLock.notifyAll();
1655 }
1656 }
1657 });
1658 try {
1659 while (!eventDispatched) {
1660 waitLock.wait();
1661 }
1662 } catch (InterruptedException ie) {
1663 return false;
1664 }
1665 }
1666
1667 try {
1668 Thread.sleep(MINIMAL_EDELAY);
1669 } catch (InterruptedException ie) {
1670 throw new RuntimeException("Interrupted");
1671 }
1672
1673 flushPendingEvents();
1674
1675 // Lock to force write-cache flush for queueEmpty.
1676 synchronized (waitLock) {
1677 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1678 }
1679 }
1680
1681 /**
1682 * Grabs the mouse input for the given window. The window must be
1683 * visible. The window or its children do not receive any
1684 * additional mouse events besides those targeted to them. All
1685 * other events will be dispatched as before - to the respective
1686 * targets. This Window will receive UngrabEvent when automatic
1687 * ungrab is about to happen. The event can be listened to by
1688 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1689 * UngrabEvent class for the list of conditions when ungrab is
1690 * about to happen.
1691 * @see UngrabEvent
1692 */
1693 public abstract void grab(Window w);
1694
1695 /**
1696 * Forces ungrab. No event will be sent.
1697 */
1698 public abstract void ungrab(Window w);
1699
1700
1701 /**
1702 * Locates the splash screen library in a platform dependent way and closes
1703 * the splash screen. Should be invoked on first top-level frame display.
1704 * @see java.awt.SplashScreen
1705 * @since 1.6
1706 */
1707 public static native void closeSplashScreen();
1708
1709 /* The following methods and variables are to support retrieving
1710 * desktop text anti-aliasing settings
1711 */
1712
1713 /* Need an instance method because setDesktopProperty(..) is protected. */
1714 private void fireDesktopFontPropertyChanges() {
1715 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1716 SunToolkit.getDesktopFontHints());
1717 }
1718
1719 private static boolean checkedSystemAAFontSettings;
1720 private static boolean useSystemAAFontSettings;
1721 private static boolean lastExtraCondition = true;
1722 private static RenderingHints desktopFontHints;
1723
1724 /* Since Swing is the reason for this "extra condition" logic its
1725 * worth documenting it in some detail.
1726 * First, a goal is for Swing and applications to both retrieve and
1727 * use the same desktop property value so that there is complete
1728 * consistency between the settings used by JDK's Swing implementation
1729 * and 3rd party custom Swing components, custom L&Fs and any general
1730 * text rendering that wants to be consistent with these.
1731 * But by default on Solaris & Linux Swing will not use AA text over
1732 * remote X11 display (unless Xrender can be used which is TBD and may not
1733 * always be available anyway) as that is a noticeable performance hit.
1734 * So there needs to be a way to express that extra condition so that
1735 * it is seen by all clients of the desktop property API.
1736 * If this were the only condition it could be handled here as it would
1737 * be the same for any L&F and could reasonably be considered to be
1738 * a static behaviour of those systems.
1739 * But GTK currently has an additional test based on locale which is
1740 * not applied by Metal. So mixing GTK in a few locales with Metal
1741 * would mean the last one wins.
1742 * This could be stored per-app context which would work
1743 * for different applets, but wouldn't help for a single application
1744 * using GTK and some other L&F concurrently.
1745 * But it is expected this will be addressed within GTK and the font
1746 * system so is a temporary and somewhat unlikely harmless corner case.
1747 */
1748 public static void setAAFontSettingsCondition(boolean extraCondition) {
1749 if (extraCondition != lastExtraCondition) {
1750 lastExtraCondition = extraCondition;
1751 if (checkedSystemAAFontSettings) {
1752 /* Someone already asked for this info, under a different
1753 * condition.
1754 * We'll force re-evaluation instead of replicating the
1755 * logic, then notify any listeners of any change.
1756 */
1757 checkedSystemAAFontSettings = false;
1758 Toolkit tk = Toolkit.getDefaultToolkit();
1759 if (tk instanceof SunToolkit) {
1760 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1761 }
1762 }
1763 }
1764 }
1765
1766 /* "false", "off", ""default" aren't explicitly tested, they
1767 * just fall through to produce a null return which all are equated to
1768 * "false".
1769 */
1770 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1771 Object aaHint = null;
1772 hintname = hintname.toLowerCase(Locale.ENGLISH);
1773 if (hintname.equals("on")) {
1774 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1775 } else if (hintname.equals("gasp")) {
1776 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1777 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1778 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1779 } else if (hintname.equals("lcd_hbgr")) {
1780 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1781 } else if (hintname.equals("lcd_vrgb")) {
1782 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1783 } else if (hintname.equals("lcd_vbgr")) {
1784 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1785 }
1786 if (aaHint != null) {
1787 RenderingHints map = new RenderingHints(null);
1788 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1789 return map;
1790 } else {
1791 return null;
1792 }
1793 }
1794
1795 /* This method determines whether to use the system font settings,
1796 * or ignore them if a L&F has specified they should be ignored, or
1797 * to override both of these with a system property specified value.
1798 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1799 * system property isn't applied as desktop properties are considered
1800 * to be inapplicable in that case. In that headless case although
1801 * this method will return "true" the toolkit will return a null map.
1802 */
1803 private static boolean useSystemAAFontSettings() {
1804 if (!checkedSystemAAFontSettings) {
1805 useSystemAAFontSettings = true; /* initially set this true */
1806 String systemAAFonts = null;
1807 Toolkit tk = Toolkit.getDefaultToolkit();
1808 if (tk instanceof SunToolkit) {
1809 systemAAFonts =
1810 AccessController.doPrivileged(
1811 new GetPropertyAction("awt.useSystemAAFontSettings"));
1812 }
1813 if (systemAAFonts != null) {
1814 useSystemAAFontSettings =
1815 Boolean.valueOf(systemAAFonts).booleanValue();
1816 /* If it is anything other than "true", then it may be
1817 * a hint name , or it may be "off, "default", etc.
1818 */
1819 if (!useSystemAAFontSettings) {
1820 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1821 }
1822 }
1823 /* If its still true, apply the extra condition */
1824 if (useSystemAAFontSettings) {
1825 useSystemAAFontSettings = lastExtraCondition;
1826 }
1827 checkedSystemAAFontSettings = true;
1828 }
1829 return useSystemAAFontSettings;
1830 }
1831
1832 /* A variable defined for the convenience of JDK code */
1833 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1834
1835 /* Overridden by subclasses to return platform/desktop specific values */
1836 protected RenderingHints getDesktopAAHints() {
1837 return null;
1838 }
1839
1840 /* Subclass desktop property loading methods call this which
1841 * in turn calls the appropriate subclass implementation of
1842 * getDesktopAAHints() when system settings are being used.
1843 * Its public rather than protected because subclasses may delegate
1844 * to a helper class.
1845 */
1846 public static RenderingHints getDesktopFontHints() {
1847 if (useSystemAAFontSettings()) {
1848 Toolkit tk = Toolkit.getDefaultToolkit();
1849 if (tk instanceof SunToolkit) {
1850 Object map = ((SunToolkit)tk).getDesktopAAHints();
1851 return (RenderingHints)map;
1852 } else { /* Headless Toolkit */
1853 return null;
1854 }
1855 } else if (desktopFontHints != null) {
1856 /* cloning not necessary as the return value is cloned later, but
1857 * its harmless.
1858 */
1859 return (RenderingHints)(desktopFontHints.clone());
1860 } else {
1861 return null;
1862 }
1863 }
1864
1865
1866 public abstract boolean isDesktopSupported();
1867
1868 /*
1869 * consumeNextKeyTyped() method is not currently used,
1870 * however Swing could use it in the future.
1871 */
1872 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1873 try {
1874 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1875 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1876 getCurrentKeyboardFocusManager(),
1877 keyEvent);
1878 } catch (ClassCastException cce) {
1879 cce.printStackTrace();
1880 }
1881 }
1882
1883 protected static void dumpPeers(final PlatformLogger aLog) {
1884 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1885 }
1886
1887 /**
1888 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1889 * @return Window ancestor of the component or component by itself if it is Window;
1890 * null, if component is not a part of window hierarchy
1891 */
1892 public static Window getContainingWindow(Component comp) {
1893 while (comp != null && !(comp instanceof Window)) {
1894 comp = comp.getParent();
1895 }
1896 return (Window)comp;
1897 }
1898
1899 private static Boolean sunAwtDisableMixing = null;
1900
1901 /**
1902 * Returns the value of "sun.awt.disableMixing" property. Default
1903 * value is {@code false}.
1904 */
1905 public synchronized static boolean getSunAwtDisableMixing() {
1906 if (sunAwtDisableMixing == null) {
1907 sunAwtDisableMixing = AccessController.doPrivileged(
1908 new GetBooleanAction("sun.awt.disableMixing"));
1909 }
1910 return sunAwtDisableMixing.booleanValue();
1911 }
1912
1913 /**
1914 * Returns true if the native GTK libraries are available. The
1915 * default implementation returns false, but UNIXToolkit overrides this
1916 * method to provide a more specific answer.
1917 */
1918 public boolean isNativeGTKAvailable() {
1919 return false;
1920 }
1921
1922 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1923
1924 public synchronized void setWindowDeactivationTime(Window w, long time) {
1925 AppContext ctx = getAppContext(w);
1926 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1927 if (map == null) {
1928 map = new WeakHashMap<Window, Long>();
1929 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1930 }
1931 map.put(w, time);
1932 }
1933
1934 public synchronized long getWindowDeactivationTime(Window w) {
1935 AppContext ctx = getAppContext(w);
1936 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1937 if (map == null) {
1938 return -1;
1939 }
1940 Long time = map.get(w);
1941 return time == null ? -1 : time;
1942 }
1943
1944 // Cosntant alpha
1945 public boolean isWindowOpacitySupported() {
1946 return false;
1947 }
1948
1949 // Shaping
1950 public boolean isWindowShapingSupported() {
1951 return false;
1952 }
1953
1954 // Per-pixel alpha
1955 public boolean isWindowTranslucencySupported() {
1956 return false;
1957 }
1958
1959 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1960 return false;
1961 }
1962
1963 /**
1964 * Returns true if swing backbuffer should be translucent.
1965 */
1966 public boolean isSwingBackbufferTranslucencySupported() {
1967 return false;
1968 }
1969
1970 /**
1971 * Returns whether or not a containing top level window for the passed
1972 * component is
1973 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1974 *
1975 * @param c a Component which toplevel's to check
1976 * @return {@code true} if the passed component is not null and has a
1977 * containing toplevel window which is opaque (so per-pixel translucency
1978 * is not enabled), {@code false} otherwise
1979 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1980 */
1981 public static boolean isContainingTopLevelOpaque(Component c) {
1982 Window w = getContainingWindow(c);
1983 return w != null && w.isOpaque();
1984 }
1985
1986 /**
1987 * Returns whether or not a containing top level window for the passed
1988 * component is
1989 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1990 *
1991 * @param c a Component which toplevel's to check
1992 * @return {@code true} if the passed component is not null and has a
1993 * containing toplevel window which has opacity less than
1994 * 1.0f (which means that it is translucent), {@code false} otherwise
1995 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1996 */
1997 public static boolean isContainingTopLevelTranslucent(Component c) {
1998 Window w = getContainingWindow(c);
1999 return w != null && w.getOpacity() < 1.0f;
2000 }
2001
2002 /**
2003 * Returns whether the native system requires using the peer.updateWindow()
2004 * method to update the contents of a non-opaque window, or if usual
2005 * painting procedures are sufficient. The default return value covers
2006 * the X11 systems. On MS Windows this method is overriden in WToolkit
2007 * to return true.
2008 */
2009 public boolean needUpdateWindow() {
2010 return false;
2011 }
2012
2013 /**
2014 * Descendants of the SunToolkit should override and put their own logic here.
2015 */
2016 public int getNumberOfButtons(){
2017 return 3;
2018 }
2019
2020 /**
2021 * Checks that the given object implements/extends the given
2022 * interface/class.
2023 *
2024 * Note that using the instanceof operator causes a class to be loaded.
2025 * Using this method doesn't load a class and it can be used instead of
2026 * the instanceof operator for performance reasons.
2027 *
2028 * @param obj Object to be checked
2029 * @param type The name of the interface/class. Must be
2030 * fully-qualified interface/class name.
2031 * @return true, if this object implements/extends the given
2032 * interface/class, false, otherwise, or if obj or type is null
2033 */
2034 public static boolean isInstanceOf(Object obj, String type) {
2035 if (obj == null) return false;
2036 if (type == null) return false;
2037
2038 return isInstanceOf(obj.getClass(), type);
2039 }
2040
2041 private static boolean isInstanceOf(Class<?> cls, String type) {
2042 if (cls == null) return false;
2043
2044 if (cls.getName().equals(type)) {
2045 return true;
2046 }
2047
2048 for (Class<?> c : cls.getInterfaces()) {
2049 if (c.getName().equals(type)) {
2050 return true;
2051 }
2052 }
2053 return isInstanceOf(cls.getSuperclass(), type);
2054 }
2055
2056 ///////////////////////////////////////////////////////////////////////////
2057 //
2058 // The following methods help set and identify whether a particular
2059 // AWTEvent object was produced by the system or by user code. As of this
2060 // writing the only consumer is the Java Plug-In, although this information
2061 // could be useful to more clients and probably should be formalized in
2062 // the public API.
2063 //
2064 ///////////////////////////////////////////////////////////////////////////
2065
2066 public static void setSystemGenerated(AWTEvent e) {
2067 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2068 }
2069
2070 public static boolean isSystemGenerated(AWTEvent e) {
2071 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2072 }
2073
2074 } // class SunToolkit
2075
2076
2077 /*
2078 * PostEventQueue is a Thread that runs in the same AppContext as the
2079 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2080 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2081 * events to this queue, which then calls EventQueue.postEvent().
2082 *
2083 * We do this because EventQueue.postEvent() may be overridden by client
2084 * code, and we mustn't ever call client code from the toolkit thread.
2085 */
2086 class PostEventQueue {
2087 private EventQueueItem queueHead = null;
2088 private EventQueueItem queueTail = null;
2089 private final EventQueue eventQueue;
2090
2091 private Thread flushThread = null;
2092
2093 PostEventQueue(EventQueue eq) {
2094 eventQueue = eq;
2095 }
2096
2097 /*
2098 * Continually post pending AWTEvents to the Java EventQueue. The method
2099 * is synchronized to ensure the flush is completed before a new event
2100 * can be posted to this queue.
2101 *
2102 * 7177040: The method couldn't be wholly synchronized because of calls
2103 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2104 * potentially lead to deadlock
2105 */
2106 public void flush() {
2107
2108 Thread newThread = Thread.currentThread();
2109
2110 try {
2111 EventQueueItem tempQueue;
2112 synchronized (this) {
2113 // Avoid method recursion
2114 if (newThread == flushThread) {
2115 return;
2116 }
2117 // Wait for other threads' flushing
2118 while (flushThread != null) {
2119 wait();
2120 }
2121 // Skip everything if queue is empty
2122 if (queueHead == null) {
2123 return;
2124 }
2125 // Remember flushing thread
2126 flushThread = newThread;
2127
2128 tempQueue = queueHead;
2129 queueHead = queueTail = null;
2130 }
2131 try {
2132 while (tempQueue != null) {
2133 eventQueue.postEvent(tempQueue.event);
2134 tempQueue = tempQueue.next;
2135 }
2136 }
2137 finally {
2138 // Only the flushing thread can get here
2139 synchronized (this) {
2140 // Forget flushing thread, inform other pending threads
2141 flushThread = null;
2142 notifyAll();
2143 }
2144 }
2145 }
2146 catch (InterruptedException e) {
2147 // Couldn't allow exception go up, so at least recover the flag
2148 newThread.interrupt();
2149 }
2150 }
2151
2152 /*
2153 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2154 */
2155 void postEvent(AWTEvent event) {
2156 EventQueueItem item = new EventQueueItem(event);
2157
2158 synchronized (this) {
2159 if (queueHead == null) {
2160 queueHead = queueTail = item;
2161 } else {
2162 queueTail.next = item;
2163 queueTail = item;
2164 }
2165 }
2166 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2167 }
2168 } // class PostEventQueue