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.security.util.SecurityConstants;
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.net.util.URLUtil;
57 import sun.security.action.GetPropertyAction;
58 import sun.security.action.GetBooleanAction;
59 import java.lang.reflect.InvocationTargetException;
60 import java.security.AccessController;
61
62 public abstract class SunToolkit extends Toolkit
63 implements WindowClosingSupport, WindowClosingListener,
64 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider {
65
66 // 8014718: logging has been removed from SunToolkit
67
68 /* Load debug settings for native code */
69 static {
70 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) {
71 DebugSettings.init();
72 }
73 touchKeyboardAutoShowIsEnabled = Boolean.valueOf(
74 AccessController.doPrivileged(new GetPropertyAction(
75 "awt.touchKeyboardAutoShowIsEnabled", "true")));
76 };
77
78 /**
79 * Special mask for the UngrabEvent events, in addition to the
80 * public masks defined in AWTEvent. Should be used as the mask
81 * value for Toolkit.addAWTEventListener.
82 */
83 public static final int GRAB_EVENT_MASK = 0x80000000;
84
85 /* The key to put()/get() the PostEventQueue into/from the AppContext.
86 */
87 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
88
89 /**
90 * Number of buttons.
91 * By default it's taken from the system. If system value does not
92 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
93 */
94 protected static int numberOfButtons = 0;
95
96
97 /* XFree standard mention 24 buttons as maximum:
98 * http://www.xfree86.org/current/mouse.4.html
99 * We workaround systems supporting more than 24 buttons.
100 * Otherwise, we have to use long type values as masks
101 * which leads to API change.
102 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
103 * the 4-bytes limit for the int type. (CR 6799099)
104 * One more bit is reserved for FIRST_HIGH_BIT.
105 */
106 public final static int MAX_BUTTONS_SUPPORTED = 20;
107
108 /**
109 * Creates and initializes EventQueue instance for the specified
110 * AppContext.
111 * Note that event queue must be created from createNewAppContext()
112 * only in order to ensure that EventQueue constructor obtains
113 * the correct AppContext.
114 * @param appContext AppContext to associate with the event queue
115 */
116 private static void initEQ(AppContext appContext) {
117 EventQueue eventQueue;
118
119 String eqName = System.getProperty("AWT.EventQueueClass",
120 "java.awt.EventQueue");
121
122 try {
123 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
124 } catch (Exception e) {
125 e.printStackTrace();
126 System.err.println("Failed loading " + eqName + ": " + e);
127 eventQueue = new EventQueue();
128 }
129 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
130
131 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
132 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
133 }
134
135 public SunToolkit() {
136 }
137
138 public boolean useBufferPerWindow() {
139 return false;
140 }
141
142 public abstract WindowPeer createWindow(Window target)
143 throws HeadlessException;
144
145 public abstract FramePeer createFrame(Frame target)
146 throws HeadlessException;
147
148 public abstract FramePeer createLightweightFrame(LightweightFrame target)
149 throws HeadlessException;
150
151 public abstract DialogPeer createDialog(Dialog target)
152 throws HeadlessException;
153
154 public abstract ButtonPeer createButton(Button target)
155 throws HeadlessException;
156
157 public abstract TextFieldPeer createTextField(TextField target)
158 throws HeadlessException;
159
160 public abstract ChoicePeer createChoice(Choice target)
161 throws HeadlessException;
162
163 public abstract LabelPeer createLabel(Label target)
164 throws HeadlessException;
165
166 public abstract ListPeer createList(java.awt.List target)
167 throws HeadlessException;
168
169 public abstract CheckboxPeer createCheckbox(Checkbox target)
170 throws HeadlessException;
171
172 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
173 throws HeadlessException;
174
175 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
176 throws HeadlessException;
177
178 public abstract TextAreaPeer createTextArea(TextArea target)
179 throws HeadlessException;
180
181 public abstract FileDialogPeer createFileDialog(FileDialog target)
182 throws HeadlessException;
183
184 public abstract MenuBarPeer createMenuBar(MenuBar target)
185 throws HeadlessException;
186
187 public abstract MenuPeer createMenu(Menu target)
188 throws HeadlessException;
189
190 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
191 throws HeadlessException;
192
193 public abstract MenuItemPeer createMenuItem(MenuItem target)
194 throws HeadlessException;
195
196 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
197 CheckboxMenuItem target)
198 throws HeadlessException;
199
200 public abstract DragSourceContextPeer createDragSourceContextPeer(
201 DragGestureEvent dge)
202 throws InvalidDnDOperationException;
203
204 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
205 throws HeadlessException, AWTException;
206
207 public abstract SystemTrayPeer createSystemTray(SystemTray target);
208
209 public abstract boolean isTraySupported();
210
211 @SuppressWarnings("deprecation")
212 public abstract FontPeer getFontPeer(String name, int style);
213
214 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
215 throws AWTException;
216
217 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
218 throws HeadlessException;
219
220 /**
221 * The AWT lock is typically only used on Unix platforms to synchronize
222 * access to Xlib, OpenGL, etc. However, these methods are implemented
223 * in SunToolkit so that they can be called from shared code (e.g.
224 * from the OGL pipeline) or from the X11 pipeline regardless of whether
225 * XToolkit or MToolkit is currently in use. There are native macros
226 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
227 * methods is changed, make sure it is compatible with the native macros.
228 *
229 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
230 * used in place of:
231 * synchronized (getAWTLock()) {
232 * ...
233 * }
234 *
235 * By factoring these methods out specially, we are able to change the
236 * implementation of these methods (e.g. use more advanced locking
237 * mechanisms) without impacting calling code.
238 *
239 * Sample usage:
240 * private void doStuffWithXlib() {
241 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
242 * SunToolkit.awtLock();
243 * try {
244 * ...
245 * XlibWrapper.XDoStuff();
246 * } finally {
247 * SunToolkit.awtUnlock();
248 * }
249 * }
250 */
251
252 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
253 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
254
255 public static final void awtLock() {
256 AWT_LOCK.lock();
257 }
258
259 public static final boolean awtTryLock() {
260 return AWT_LOCK.tryLock();
261 }
262
263 public static final void awtUnlock() {
264 AWT_LOCK.unlock();
265 }
266
267 public static final void awtLockWait()
268 throws InterruptedException
269 {
270 AWT_LOCK_COND.await();
271 }
272
273 public static final void awtLockWait(long timeout)
274 throws InterruptedException
275 {
276 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
277 }
278
279 public static final void awtLockNotify() {
280 AWT_LOCK_COND.signal();
281 }
282
283 public static final void awtLockNotifyAll() {
284 AWT_LOCK_COND.signalAll();
285 }
286
287 public static final boolean isAWTLockHeldByCurrentThread() {
288 return AWT_LOCK.isHeldByCurrentThread();
289 }
290
291 /*
292 * Create a new AppContext, along with its EventQueue, for a
293 * new ThreadGroup. Browser code, for example, would use this
294 * method to create an AppContext & EventQueue for an Applet.
295 */
296 public static AppContext createNewAppContext() {
297 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
298 return createNewAppContext(threadGroup);
299 }
300
301 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
302 // Create appContext before initialization of EventQueue, so all
303 // the calls to AppContext.getAppContext() from EventQueue ctor
304 // return correct values
305 AppContext appContext = new AppContext(threadGroup);
306 initEQ(appContext);
307
308 return appContext;
309 }
310
311 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
312 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
313 }
314
315 /*
316 * Fetch the peer associated with the given target (as specified
317 * in the peer creation method). This can be used to determine
318 * things like what the parent peer is. If the target is null
319 * or the target can't be found (either because the a peer was
320 * never created for it or the peer was disposed), a null will
321 * be returned.
322 */
323 protected static Object targetToPeer(Object target) {
324 if (target != null && !GraphicsEnvironment.isHeadless()) {
325 return AWTAutoShutdown.getInstance().getPeer(target);
326 }
327 return null;
328 }
329
330 protected static void targetCreatedPeer(Object target, Object peer) {
331 if (target != null && peer != null &&
332 !GraphicsEnvironment.isHeadless())
333 {
334 AWTAutoShutdown.getInstance().registerPeer(target, peer);
335 }
336 }
337
338 protected static void targetDisposedPeer(Object target, Object peer) {
339 if (target != null && peer != null &&
340 !GraphicsEnvironment.isHeadless())
341 {
342 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
343 }
344 }
345
346 // Maps from non-Component/MenuComponent to AppContext.
347 // WeakHashMap<Component,AppContext>
348 private static final Map<Object, AppContext> appContextMap =
349 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
350
351 /**
352 * Sets the appContext field of target. If target is not a Component or
353 * MenuComponent, this returns false.
354 */
355 private static boolean setAppContext(Object target,
356 AppContext context) {
357 if (target instanceof Component) {
358 AWTAccessor.getComponentAccessor().
359 setAppContext((Component)target, context);
360 } else if (target instanceof MenuComponent) {
361 AWTAccessor.getMenuComponentAccessor().
362 setAppContext((MenuComponent)target, context);
363 } else {
364 return false;
365 }
366 return true;
367 }
368
369 /**
370 * Returns the appContext field for target. If target is not a
371 * Component or MenuComponent this returns null.
372 */
373 private static AppContext getAppContext(Object target) {
374 if (target instanceof Component) {
375 return AWTAccessor.getComponentAccessor().
376 getAppContext((Component)target);
377 } else if (target instanceof MenuComponent) {
378 return AWTAccessor.getMenuComponentAccessor().
379 getAppContext((MenuComponent)target);
380 } else {
381 return null;
382 }
383 }
384
385 /*
386 * Fetch the AppContext associated with the given target.
387 * This can be used to determine things like which EventQueue
388 * to use for posting events to a Component. If the target is
389 * null or the target can't be found, a null with be returned.
390 */
391 public static AppContext targetToAppContext(Object target) {
392 if (target == null) {
393 return null;
394 }
395 AppContext context = getAppContext(target);
396 if (context == null) {
397 // target is not a Component/MenuComponent, try the
398 // appContextMap.
399 context = appContextMap.get(target);
400 }
401 return context;
402 }
403
404 /**
405 * Sets the synchronous status of focus requests on lightweight
406 * components in the specified window to the specified value.
407 * If the boolean parameter is <code>true</code> then the focus
408 * requests on lightweight components will be performed
409 * synchronously, if it is <code>false</code>, then asynchronously.
410 * By default, all windows have their lightweight request status
411 * set to asynchronous.
412 * <p>
413 * The application can only set the status of lightweight focus
414 * requests to synchronous for any of its windows if it doesn't
415 * perform focus transfers between different heavyweight containers.
416 * In this case the observable focus behaviour is the same as with
417 * asynchronous status.
418 * <p>
419 * If the application performs focus transfer between different
420 * heavyweight containers and sets the lightweight focus request
421 * status to synchronous for any of its windows, then further focus
422 * behaviour is unspecified.
423 * <p>
424 * @param w window for which the lightweight focus request status
425 * should be set
426 * @param status the value of lightweight focus request status
427 */
428
429 public static void setLWRequestStatus(Window changed,boolean status){
430 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
431 };
432
433 public static void checkAndSetPolicy(Container cont) {
434 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
435 getCurrentKeyboardFocusManager().
436 getDefaultFocusTraversalPolicy();
437
438 cont.setFocusTraversalPolicy(defaultPolicy);
439 }
440
441 private static FocusTraversalPolicy createLayoutPolicy() {
442 FocusTraversalPolicy policy = null;
443 try {
444 Class<?> layoutPolicyClass =
445 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
446 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
447 }
448 catch (ClassNotFoundException e) {
449 assert false;
450 }
451 catch (InstantiationException e) {
452 assert false;
453 }
454 catch (IllegalAccessException e) {
455 assert false;
456 }
457
458 return policy;
459 }
460
461 /*
462 * Insert a mapping from target to AppContext, for later retrieval
463 * via targetToAppContext() above.
464 */
465 public static void insertTargetMapping(Object target, AppContext appContext) {
466 if (!setAppContext(target, appContext)) {
467 // Target is not a Component/MenuComponent, use the private Map
468 // instead.
469 appContextMap.put(target, appContext);
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 fileImgCache = new SoftCache();
722
723 static final SoftCache urlImgCache = new SoftCache();
724
725 static Image getImageFromHash(Toolkit tk, URL url) {
726 checkPermissions(url);
727 synchronized (urlImgCache) {
728 String key = url.toString();
729 Image img = (Image)urlImgCache.get(key);
730 if (img == null) {
731 try {
732 img = tk.createImage(new URLImageSource(url));
733 urlImgCache.put(key, img);
734 } catch (Exception e) {
735 }
736 }
737 return img;
738 }
739 }
740
741 static Image getImageFromHash(Toolkit tk,
742 String filename) {
743 checkPermissions(filename);
744 synchronized (fileImgCache) {
745 Image img = (Image)fileImgCache.get(filename);
746 if (img == null) {
747 try {
748 img = tk.createImage(new FileImageSource(filename));
749 fileImgCache.put(filename, img);
750 } catch (Exception e) {
751 }
752 }
753 return img;
754 }
755 }
756
757 public Image getImage(String filename) {
758 return getImageFromHash(this, filename);
759 }
760
761 public Image getImage(URL url) {
762 return getImageFromHash(this, url);
763 }
764
765 protected Image getImageWithResolutionVariant(String fileName,
766 String resolutionVariantName) {
767 synchronized (fileImgCache) {
768 Image image = getImageFromHash(this, fileName);
769 if (image instanceof MultiResolutionImage) {
770 return image;
771 }
772 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
773 image = createImageWithResolutionVariant(image, resolutionVariant);
774 fileImgCache.put(fileName, image);
775 return image;
776 }
777 }
778
779 protected Image getImageWithResolutionVariant(URL url,
780 URL resolutionVariantURL) {
781 synchronized (urlImgCache) {
782 Image image = getImageFromHash(this, url);
783 if (image instanceof MultiResolutionImage) {
784 return image;
785 }
786 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
787 image = createImageWithResolutionVariant(image, resolutionVariant);
788 String key = url.toString();
789 urlImgCache.put(key, image);
790 return image;
791 }
792 }
793
794
795 public Image createImage(String filename) {
796 checkPermissions(filename);
797 return createImage(new FileImageSource(filename));
798 }
799
800 public Image createImage(URL url) {
801 checkPermissions(url);
802 return createImage(new URLImageSource(url));
803 }
804
805 public Image createImage(byte[] data, int offset, int length) {
806 return createImage(new ByteArrayImageSource(data, offset, length));
807 }
808
809 public Image createImage(ImageProducer producer) {
810 return new ToolkitImage(producer);
811 }
812
813 public static Image createImageWithResolutionVariant(Image image,
814 Image resolutionVariant) {
815 return new MultiResolutionToolkitImage(image, resolutionVariant);
816 }
817
818 public int checkImage(Image img, int w, int h, ImageObserver o) {
819 if (!(img instanceof ToolkitImage)) {
820 return ImageObserver.ALLBITS;
821 }
822
823 ToolkitImage tkimg = (ToolkitImage)img;
824 int repbits;
825 if (w == 0 || h == 0) {
826 repbits = ImageObserver.ALLBITS;
827 } else {
828 repbits = tkimg.getImageRep().check(o);
829 }
830 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
831 }
832
833 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
834 if (w == 0 || h == 0) {
835 return true;
836 }
837
838 // Must be a ToolkitImage
839 if (!(img instanceof ToolkitImage)) {
840 return true;
841 }
842
843 ToolkitImage tkimg = (ToolkitImage)img;
844 if (tkimg.hasError()) {
845 if (o != null) {
846 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
847 -1, -1, -1, -1);
848 }
849 return false;
850 }
851 ImageRepresentation ir = tkimg.getImageRep();
852 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
853 }
854
855 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
856 ToolkitImage rvImage = getResolutionVariant(img);
857 int rvw = getRVSize(w);
858 int rvh = getRVSize(h);
859 // Ignore the resolution variant in case of error
860 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
861 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
862 getResolutionVariantObserver(
863 img, o, w, h, rvw, rvh, true));
864 }
865
866 private boolean prepareResolutionVariant(Image img, int w, int h,
867 ImageObserver o) {
868
869 ToolkitImage rvImage = getResolutionVariant(img);
870 int rvw = getRVSize(w);
871 int rvh = getRVSize(h);
872 // Ignore the resolution variant in case of error
873 return rvImage == null || rvImage.hasError() || prepareImage(
874 rvImage, rvw, rvh,
875 MultiResolutionToolkitImage.getResolutionVariantObserver(
876 img, o, w, h, rvw, rvh, true));
877 }
878
879 private static int getRVSize(int size){
880 return size == -1 ? -1 : 2 * size;
881 }
882
883 private static ToolkitImage getResolutionVariant(Image image) {
884 if (image instanceof MultiResolutionToolkitImage) {
885 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
886 getResolutionVariant();
887 if (resolutionVariant instanceof ToolkitImage) {
888 return (ToolkitImage) resolutionVariant;
889 }
890 }
891 return null;
892 }
893
894 protected static boolean imageCached(String fileName) {
895 return fileImgCache.containsKey(fileName);
896 }
897
898 protected static boolean imageCached(URL url) {
899 String key = url.toString();
900 return urlImgCache.containsKey(key);
901 }
902
903 protected static boolean imageExists(String filename) {
904 if (filename != null) {
905 checkPermissions(filename);
906 return new File(filename).exists();
907 }
908 return false;
909 }
910
911 @SuppressWarnings("try")
912 protected static boolean imageExists(URL url) {
913 if (url != null) {
914 checkPermissions(url);
915 try (InputStream is = url.openStream()) {
916 return true;
917 }catch(IOException e){
918 return false;
919 }
920 }
921 return false;
922 }
923
924 private static void checkPermissions(String filename) {
925 SecurityManager security = System.getSecurityManager();
926 if (security != null) {
927 security.checkRead(filename);
928 }
929 }
930
931 private static void checkPermissions(URL url) {
932 SecurityManager sm = System.getSecurityManager();
933 if (sm != null) {
934 try {
935 java.security.Permission perm =
936 URLUtil.getConnectPermission(url);
937 if (perm != null) {
938 try {
939 sm.checkPermission(perm);
940 } catch (SecurityException se) {
941 // fallback to checkRead/checkConnect for pre 1.2
942 // security managers
943 if ((perm instanceof java.io.FilePermission) &&
944 perm.getActions().indexOf("read") != -1) {
945 sm.checkRead(perm.getName());
946 } else if ((perm instanceof
947 java.net.SocketPermission) &&
948 perm.getActions().indexOf("connect") != -1) {
949 sm.checkConnect(url.getHost(), url.getPort());
950 } else {
951 throw se;
952 }
953 }
954 }
955 } catch (java.io.IOException ioe) {
956 sm.checkConnect(url.getHost(), url.getPort());
957 }
958 }
959 }
960
961 /**
962 * Scans {@code imageList} for best-looking image of specified dimensions.
963 * Image can be scaled and/or padded with transparency.
964 */
965 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
966 if (width == 0 || height == 0) {
967 return null;
968 }
969 Image bestImage = null;
970 int bestWidth = 0;
971 int bestHeight = 0;
972 double bestSimilarity = 3; //Impossibly high value
973 double bestScaleFactor = 0;
974 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
975 //Iterate imageList looking for best matching image.
976 //'Similarity' measure is defined as good scale factor and small insets.
977 //best possible similarity is 0 (no scale, no insets).
978 //It's found while the experiments that good-looking result is achieved
979 //with scale factors x1, x3/4, x2/3, xN, x1/N.
980 Image im = i.next();
981 if (im == null) {
982 continue;
983 }
984 if (im instanceof ToolkitImage) {
985 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
986 ir.reconstruct(ImageObserver.ALLBITS);
987 }
988 int iw;
989 int ih;
990 try {
991 iw = im.getWidth(null);
992 ih = im.getHeight(null);
993 } catch (Exception e){
994 continue;
995 }
996 if (iw > 0 && ih > 0) {
997 //Calc scale factor
998 double scaleFactor = Math.min((double)width / (double)iw,
999 (double)height / (double)ih);
1000 //Calculate scaled image dimensions
1001 //adjusting scale factor to nearest "good" value
1002 int adjw = 0;
1003 int adjh = 0;
1004 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
1005 if (scaleFactor >= 2) {
1006 //Need to enlarge image more than twice
1007 //Round down scale factor to multiply by integer value
1008 scaleFactor = Math.floor(scaleFactor);
1009 adjw = iw * (int)scaleFactor;
1010 adjh = ih * (int)scaleFactor;
1011 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1012 } else if (scaleFactor >= 1) {
1013 //Don't scale
1014 scaleFactor = 1.0;
1015 adjw = iw;
1016 adjh = ih;
1017 scaleMeasure = 0;
1018 } else if (scaleFactor >= 0.75) {
1019 //Multiply by 3/4
1020 scaleFactor = 0.75;
1021 adjw = iw * 3 / 4;
1022 adjh = ih * 3 / 4;
1023 scaleMeasure = 0.3;
1024 } else if (scaleFactor >= 0.6666) {
1025 //Multiply by 2/3
1026 scaleFactor = 0.6666;
1027 adjw = iw * 2 / 3;
1028 adjh = ih * 2 / 3;
1029 scaleMeasure = 0.33;
1030 } else {
1031 //Multiply size by 1/scaleDivider
1032 //where scaleDivider is minimum possible integer
1033 //larger than 1/scaleFactor
1034 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1035 scaleFactor = 1.0 / scaleDivider;
1036 adjw = (int)Math.round((double)iw / scaleDivider);
1037 adjh = (int)Math.round((double)ih / scaleDivider);
1038 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1039 }
1040 double similarity = ((double)width - (double)adjw) / (double)width +
1041 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1042 scaleMeasure; //Large rescale is bad
1043 if (similarity < bestSimilarity) {
1044 bestSimilarity = similarity;
1045 bestScaleFactor = scaleFactor;
1046 bestImage = im;
1047 bestWidth = adjw;
1048 bestHeight = adjh;
1049 }
1050 if (similarity == 0) break;
1051 }
1052 }
1053 if (bestImage == null) {
1054 //No images were found, possibly all are broken
1055 return null;
1056 }
1057 BufferedImage bimage =
1058 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1059 Graphics2D g = bimage.createGraphics();
1060 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1061 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1062 try {
1063 int x = (width - bestWidth) / 2;
1064 int y = (height - bestHeight) / 2;
1065 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1066 } finally {
1067 g.dispose();
1068 }
1069 return bimage;
1070 }
1071
1072 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1073 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1074 if (bimage == null) {
1075 return null;
1076 }
1077 Raster raster = bimage.getRaster();
1078 DataBuffer buffer = raster.getDataBuffer();
1079 return (DataBufferInt)buffer;
1080 }
1081
1082 protected EventQueue getSystemEventQueueImpl() {
1083 return getSystemEventQueueImplPP();
1084 }
1085
1086 // Package private implementation
1087 static EventQueue getSystemEventQueueImplPP() {
1088 return getSystemEventQueueImplPP(AppContext.getAppContext());
1089 }
1090
1091 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1092 EventQueue theEventQueue =
1093 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1094 return theEventQueue;
1095 }
1096
1097 /**
1098 * Give native peers the ability to query the native container
1099 * given a native component (eg the direct parent may be lightweight).
1100 */
1101 public static Container getNativeContainer(Component c) {
1102 return Toolkit.getNativeContainer(c);
1103 }
1104
1105 /**
1106 * Gives native peers the ability to query the closest HW component.
1107 * If the given component is heavyweight, then it returns this. Otherwise,
1108 * it goes one level up in the hierarchy and tests next component.
1109 */
1110 public static Component getHeavyweightComponent(Component c) {
1111 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1112 c = AWTAccessor.getComponentAccessor().getParent(c);
1113 }
1114 return c;
1115 }
1116
1117 /**
1118 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1119 */
1120 public int getFocusAcceleratorKeyMask() {
1121 return InputEvent.ALT_MASK;
1122 }
1123
1124 /**
1125 * Tests whether specified key modifiers mask can be used to enter a printable
1126 * character. This is a default implementation of this method, which reflects
1127 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1128 * characters from the extended character set (like euro sign or math symbols)
1129 */
1130 public boolean isPrintableCharacterModifiersMask(int mods) {
1131 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1132 }
1133
1134 /**
1135 * Returns whether popup is allowed to be shown above the task bar.
1136 * This is a default implementation of this method, which checks
1137 * corresponding security permission.
1138 */
1139 public boolean canPopupOverlapTaskBar() {
1140 boolean result = true;
1141 try {
1142 SecurityManager sm = System.getSecurityManager();
1143 if (sm != null) {
1144 sm.checkPermission(
1145 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1146 }
1147 } catch (SecurityException se) {
1148 // There is no permission to show popups over the task bar
1149 result = false;
1150 }
1151 return result;
1152 }
1153
1154 /**
1155 * Returns a new input method window, with behavior as specified in
1156 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1157 * If the inputContext is not null, the window should return it from its
1158 * getInputContext() method. The window needs to implement
1159 * sun.awt.im.InputMethodWindow.
1160 * <p>
1161 * SunToolkit subclasses can override this method to return better input
1162 * method windows.
1163 */
1164 public Window createInputMethodWindow(String title, InputContext context) {
1165 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1166 }
1167
1168 /**
1169 * Returns whether enableInputMethods should be set to true for peered
1170 * TextComponent instances on this platform. False by default.
1171 */
1172 public boolean enableInputMethodsForTextComponent() {
1173 return false;
1174 }
1175
1176 private static Locale startupLocale = null;
1177
1178 /**
1179 * Returns the locale in which the runtime was started.
1180 */
1181 public static Locale getStartupLocale() {
1182 if (startupLocale == null) {
1183 String language, region, country, variant;
1184 language = AccessController.doPrivileged(
1185 new GetPropertyAction("user.language", "en"));
1186 // for compatibility, check for old user.region property
1187 region = AccessController.doPrivileged(
1188 new GetPropertyAction("user.region"));
1189 if (region != null) {
1190 // region can be of form country, country_variant, or _variant
1191 int i = region.indexOf('_');
1192 if (i >= 0) {
1193 country = region.substring(0, i);
1194 variant = region.substring(i + 1);
1195 } else {
1196 country = region;
1197 variant = "";
1198 }
1199 } else {
1200 country = AccessController.doPrivileged(
1201 new GetPropertyAction("user.country", ""));
1202 variant = AccessController.doPrivileged(
1203 new GetPropertyAction("user.variant", ""));
1204 }
1205 startupLocale = new Locale(language, country, variant);
1206 }
1207 return startupLocale;
1208 }
1209
1210 /**
1211 * Returns the default keyboard locale of the underlying operating system
1212 */
1213 public Locale getDefaultKeyboardLocale() {
1214 return getStartupLocale();
1215 }
1216
1217 // Support for window closing event notifications
1218 private transient WindowClosingListener windowClosingListener = null;
1219 /**
1220 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1221 */
1222 public WindowClosingListener getWindowClosingListener() {
1223 return windowClosingListener;
1224 }
1225 /**
1226 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1227 */
1228 public void setWindowClosingListener(WindowClosingListener wcl) {
1229 windowClosingListener = wcl;
1230 }
1231
1232 /**
1233 * @see sun.awt.WindowClosingListener#windowClosingNotify
1234 */
1235 public RuntimeException windowClosingNotify(WindowEvent event) {
1236 if (windowClosingListener != null) {
1237 return windowClosingListener.windowClosingNotify(event);
1238 } else {
1239 return null;
1240 }
1241 }
1242 /**
1243 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1244 */
1245 public RuntimeException windowClosingDelivered(WindowEvent event) {
1246 if (windowClosingListener != null) {
1247 return windowClosingListener.windowClosingDelivered(event);
1248 } else {
1249 return null;
1250 }
1251 }
1252
1253 private static DefaultMouseInfoPeer mPeer = null;
1254
1255 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1256 if (mPeer == null) {
1257 mPeer = new DefaultMouseInfoPeer();
1258 }
1259 return mPeer;
1260 }
1261
1262
1263 /**
1264 * Returns whether default toolkit needs the support of the xembed
1265 * from embedding host(if any).
1266 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1267 */
1268 public static boolean needsXEmbed() {
1269 String noxembed = AccessController.
1270 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1271 if ("true".equals(noxembed)) {
1272 return false;
1273 }
1274
1275 Toolkit tk = Toolkit.getDefaultToolkit();
1276 if (tk instanceof SunToolkit) {
1277 // SunToolkit descendants should override this method to specify
1278 // concrete behavior
1279 return ((SunToolkit)tk).needsXEmbedImpl();
1280 } else {
1281 // Non-SunToolkit doubtly might support XEmbed
1282 return false;
1283 }
1284 }
1285
1286 /**
1287 * Returns whether this toolkit needs the support of the xembed
1288 * from embedding host(if any).
1289 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1290 */
1291 protected boolean needsXEmbedImpl() {
1292 return false;
1293 }
1294
1295 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1296
1297 /**
1298 * Returns whether the XEmbed server feature is requested by
1299 * developer. If true, Toolkit should return an
1300 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1301 */
1302 protected final boolean isXEmbedServerRequested() {
1303 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1304 }
1305
1306 /**
1307 * Returns whether the modal exclusion API is supported by the current toolkit.
1308 * When it isn't supported, calling <code>setModalExcluded</code> has no
1309 * effect, and <code>isModalExcluded</code> returns false for all windows.
1310 *
1311 * @return true if modal exclusion is supported by the toolkit, false otherwise
1312 *
1313 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1314 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1315 *
1316 * @since 1.5
1317 */
1318 public static boolean isModalExcludedSupported()
1319 {
1320 Toolkit tk = Toolkit.getDefaultToolkit();
1321 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1322 }
1323 /*
1324 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1325 *
1326 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1327 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1328 *
1329 * @since 1.5
1330 */
1331 protected boolean isModalExcludedSupportedImpl()
1332 {
1333 return false;
1334 }
1335
1336 /*
1337 * Sets this window to be excluded from being modally blocked. When the
1338 * toolkit supports modal exclusion and this method is called, input
1339 * events, focus transfer and z-order will continue to work for the
1340 * window, it's owned windows and child components, even in the
1341 * presence of a modal dialog.
1342 * For details on which <code>Window</code>s are normally blocked
1343 * by modal dialog, see {@link java.awt.Dialog}.
1344 * Invoking this method when the modal exclusion API is not supported by
1345 * the current toolkit has no effect.
1346 * @param window Window to be marked as not modally blocked
1347 * @see java.awt.Dialog
1348 * @see java.awt.Dialog#setModal(boolean)
1349 * @see sun.awt.SunToolkit#isModalExcludedSupported
1350 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1351 */
1352 public static void setModalExcluded(Window window)
1353 {
1354 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1355 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1356 }
1357 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1358 }
1359
1360 /*
1361 * Returns whether the specified window is blocked by modal dialogs.
1362 * If the modal exclusion API isn't supported by the current toolkit,
1363 * it returns false for all windows.
1364 *
1365 * @param window Window to test for modal exclusion
1366 *
1367 * @return true if the window is modal excluded, false otherwise. If
1368 * the modal exclusion isn't supported by the current Toolkit, false
1369 * is returned
1370 *
1371 * @see sun.awt.SunToolkit#isModalExcludedSupported
1372 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1373 *
1374 * @since 1.5
1375 */
1376 public static boolean isModalExcluded(Window window)
1377 {
1378 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1379 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1380 }
1381 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1382 }
1383
1384 /**
1385 * Overridden in XToolkit and WToolkit
1386 */
1387 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1388 return (modalityType == Dialog.ModalityType.MODELESS) ||
1389 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1390 }
1391
1392 /**
1393 * Overridden in XToolkit and WToolkit
1394 */
1395 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1396 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1397 }
1398
1399 ///////////////////////////////////////////////////////////////////////////
1400 //
1401 // The following is used by the Java Plug-in to coordinate dialog modality
1402 // between containing applications (browsers, ActiveX containers etc) and
1403 // the AWT.
1404 //
1405 ///////////////////////////////////////////////////////////////////////////
1406
1407 private ModalityListenerList modalityListeners = new ModalityListenerList();
1408
1409 public void addModalityListener(ModalityListener listener) {
1410 modalityListeners.add(listener);
1411 }
1412
1413 public void removeModalityListener(ModalityListener listener) {
1414 modalityListeners.remove(listener);
1415 }
1416
1417 public void notifyModalityPushed(Dialog dialog) {
1418 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1419 }
1420
1421 public void notifyModalityPopped(Dialog dialog) {
1422 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1423 }
1424
1425 final void notifyModalityChange(int id, Dialog source) {
1426 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1427 ev.dispatch();
1428 }
1429
1430 static class ModalityListenerList implements ModalityListener {
1431
1432 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1433
1434 void add(ModalityListener listener) {
1435 listeners.addElement(listener);
1436 }
1437
1438 void remove(ModalityListener listener) {
1439 listeners.removeElement(listener);
1440 }
1441
1442 public void modalityPushed(ModalityEvent ev) {
1443 Iterator<ModalityListener> it = listeners.iterator();
1444 while (it.hasNext()) {
1445 it.next().modalityPushed(ev);
1446 }
1447 }
1448
1449 public void modalityPopped(ModalityEvent ev) {
1450 Iterator<ModalityListener> it = listeners.iterator();
1451 while (it.hasNext()) {
1452 it.next().modalityPopped(ev);
1453 }
1454 }
1455 } // end of class ModalityListenerList
1456
1457 ///////////////////////////////////////////////////////////////////////////
1458 // End Plug-in code
1459 ///////////////////////////////////////////////////////////////////////////
1460
1461 public static boolean isLightweightOrUnknown(Component comp) {
1462 if (comp.isLightweight()
1463 || !(getDefaultToolkit() instanceof SunToolkit))
1464 {
1465 return true;
1466 }
1467 return !(comp instanceof Button
1468 || comp instanceof Canvas
1469 || comp instanceof Checkbox
1470 || comp instanceof Choice
1471 || comp instanceof Label
1472 || comp instanceof java.awt.List
1473 || comp instanceof Panel
1474 || comp instanceof Scrollbar
1475 || comp instanceof ScrollPane
1476 || comp instanceof TextArea
1477 || comp instanceof TextField
1478 || comp instanceof Window);
1479 }
1480
1481 @SuppressWarnings("serial")
1482 public static class OperationTimedOut extends RuntimeException {
1483 public OperationTimedOut(String msg) {
1484 super(msg);
1485 }
1486 public OperationTimedOut() {
1487 }
1488 }
1489
1490 @SuppressWarnings("serial")
1491 public static class InfiniteLoop extends RuntimeException {
1492 }
1493
1494 @SuppressWarnings("serial")
1495 public static class IllegalThreadException extends RuntimeException {
1496 public IllegalThreadException(String msg) {
1497 super(msg);
1498 }
1499 public IllegalThreadException() {
1500 }
1501 }
1502
1503 public static final int DEFAULT_WAIT_TIME = 10000;
1504 private static final int MAX_ITERS = 20;
1505 private static final int MIN_ITERS = 0;
1506 private static final int MINIMAL_EDELAY = 0;
1507
1508 /**
1509 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1510 */
1511 public void realSync() throws OperationTimedOut, InfiniteLoop {
1512 realSync(DEFAULT_WAIT_TIME);
1513 }
1514
1515 /**
1516 * Forces toolkit to synchronize with the native windowing
1517 * sub-system, flushing all pending work and waiting for all the
1518 * events to be processed. This method guarantees that after
1519 * return no additional Java events will be generated, unless
1520 * cause by user. Obviously, the method cannot be used on the
1521 * event dispatch thread (EDT). In case it nevertheless gets
1522 * invoked on this thread, the method throws the
1523 * IllegalThreadException runtime exception.
1524 *
1525 * <p> This method allows to write tests without explicit timeouts
1526 * or wait for some event. Example:
1527 * <code>
1528 * Frame f = ...;
1529 * f.setVisible(true);
1530 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1531 * </code>
1532 *
1533 * <p> After realSync, <code>f</code> will be completely visible
1534 * on the screen, its getLocationOnScreen will be returning the
1535 * right result and it will be the focus owner.
1536 *
1537 * <p> Another example:
1538 * <code>
1539 * b.requestFocus();
1540 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1541 * </code>
1542 *
1543 * <p> After realSync, <code>b</code> will be focus owner.
1544 *
1545 * <p> Notice that realSync isn't guaranteed to work if recurring
1546 * actions occur, such as if during processing of some event
1547 * another request which may generate some events occurs. By
1548 * default, sync tries to perform as much as {@value MAX_ITERS}
1549 * cycles of event processing, allowing for roughly {@value
1550 * MAX_ITERS} additional requests.
1551 *
1552 * <p> For example, requestFocus() generates native request, which
1553 * generates one or two Java focus events, which then generate a
1554 * serie of paint events, a serie of Java focus events, which then
1555 * generate a serie of paint events which then are processed -
1556 * three cycles, minimum.
1557 *
1558 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1559 */
1560 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1561 {
1562 if (EventQueue.isDispatchThread()) {
1563 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1564 }
1565 int bigLoop = 0;
1566 do {
1567 // Let's do sync first
1568 sync();
1569
1570 // During the wait process, when we were processing incoming
1571 // events, we could have made some new request, which can
1572 // generate new events. Example: MapNotify/XSetInputFocus.
1573 // Therefore, we dispatch them as long as there is something
1574 // to dispatch.
1575 int iters = 0;
1576 while (iters < MIN_ITERS) {
1577 syncNativeQueue(timeout);
1578 iters++;
1579 }
1580 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1581 iters++;
1582 }
1583 if (iters >= MAX_ITERS) {
1584 throw new InfiniteLoop();
1585 }
1586
1587 // native requests were dispatched by X/Window Manager or Windows
1588 // Moreover, we processed them all on Toolkit thread
1589 // Now wait while EDT processes them.
1590 //
1591 // During processing of some events (focus, for example),
1592 // some other events could have been generated. So, after
1593 // waitForIdle, we may end up with full EventQueue
1594 iters = 0;
1595 while (iters < MIN_ITERS) {
1596 waitForIdle(timeout);
1597 iters++;
1598 }
1599 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1600 iters++;
1601 }
1602 if (iters >= MAX_ITERS) {
1603 throw new InfiniteLoop();
1604 }
1605
1606 bigLoop++;
1607 // Again, for Java events, it was simple to check for new Java
1608 // events by checking event queue, but what if Java events
1609 // resulted in native requests? Therefor, check native events again.
1610 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1611 }
1612
1613 /**
1614 * Platform toolkits need to implement this method to perform the
1615 * sync of the native queue. The method should wait until native
1616 * requests are processed, all native events are processed and
1617 * corresponding Java events are generated. Should return
1618 * <code>true</code> if some events were processed,
1619 * <code>false</code> otherwise.
1620 */
1621 protected abstract boolean syncNativeQueue(final long timeout);
1622
1623 private boolean eventDispatched = false;
1624 private boolean queueEmpty = false;
1625 private final Object waitLock = "Wait Lock";
1626
1627 private boolean isEQEmpty() {
1628 EventQueue queue = getSystemEventQueueImpl();
1629 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1630 }
1631
1632 /**
1633 * Waits for the Java event queue to empty. Ensures that all
1634 * events are processed (including paint events), and that if
1635 * recursive events were generated, they are also processed.
1636 * Should return <code>true</code> if more processing is
1637 * necessary, <code>false</code> otherwise.
1638 */
1639 @SuppressWarnings("serial")
1640 protected final boolean waitForIdle(final long timeout) {
1641 flushPendingEvents();
1642 boolean queueWasEmpty = isEQEmpty();
1643 queueEmpty = false;
1644 eventDispatched = false;
1645 synchronized(waitLock) {
1646 postEvent(AppContext.getAppContext(),
1647 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1648 public void dispatch() {
1649 // Here we block EDT. It could have some
1650 // events, it should have dispatched them by
1651 // now. So native requests could have been
1652 // generated. First, dispatch them. Then,
1653 // flush Java events again.
1654 int iters = 0;
1655 while (iters < MIN_ITERS) {
1656 syncNativeQueue(timeout);
1657 iters++;
1658 }
1659 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1660 iters++;
1661 }
1662 flushPendingEvents();
1663
1664 synchronized(waitLock) {
1665 queueEmpty = isEQEmpty();
1666 eventDispatched = true;
1667 waitLock.notifyAll();
1668 }
1669 }
1670 });
1671 try {
1672 while (!eventDispatched) {
1673 waitLock.wait();
1674 }
1675 } catch (InterruptedException ie) {
1676 return false;
1677 }
1678 }
1679
1680 try {
1681 Thread.sleep(MINIMAL_EDELAY);
1682 } catch (InterruptedException ie) {
1683 throw new RuntimeException("Interrupted");
1684 }
1685
1686 flushPendingEvents();
1687
1688 // Lock to force write-cache flush for queueEmpty.
1689 synchronized (waitLock) {
1690 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1691 }
1692 }
1693
1694 /**
1695 * Grabs the mouse input for the given window. The window must be
1696 * visible. The window or its children do not receive any
1697 * additional mouse events besides those targeted to them. All
1698 * other events will be dispatched as before - to the respective
1699 * targets. This Window will receive UngrabEvent when automatic
1700 * ungrab is about to happen. The event can be listened to by
1701 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1702 * UngrabEvent class for the list of conditions when ungrab is
1703 * about to happen.
1704 * @see UngrabEvent
1705 */
1706 public abstract void grab(Window w);
1707
1708 /**
1709 * Forces ungrab. No event will be sent.
1710 */
1711 public abstract void ungrab(Window w);
1712
1713 public void showOrHideTouchKeyboard(Component comp, AWTEvent e) {}
1714
1715 private static boolean touchKeyboardAutoShowIsEnabled;
1716
1717 public static boolean isTouchKeyboardAutoShowEnabled() {
1718 return touchKeyboardAutoShowIsEnabled;
1719 }
1720
1721 /**
1722 * Locates the splash screen library in a platform dependent way and closes
1723 * the splash screen. Should be invoked on first top-level frame display.
1724 * @see java.awt.SplashScreen
1725 * @since 1.6
1726 */
1727 public static native void closeSplashScreen();
1728
1729 /* The following methods and variables are to support retrieving
1730 * desktop text anti-aliasing settings
1731 */
1732
1733 /* Need an instance method because setDesktopProperty(..) is protected. */
1734 private void fireDesktopFontPropertyChanges() {
1735 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1736 SunToolkit.getDesktopFontHints());
1737 }
1738
1739 private static boolean checkedSystemAAFontSettings;
1740 private static boolean useSystemAAFontSettings;
1741 private static boolean lastExtraCondition = true;
1742 private static RenderingHints desktopFontHints;
1743
1744 /* Since Swing is the reason for this "extra condition" logic its
1745 * worth documenting it in some detail.
1746 * First, a goal is for Swing and applications to both retrieve and
1747 * use the same desktop property value so that there is complete
1748 * consistency between the settings used by JDK's Swing implementation
1749 * and 3rd party custom Swing components, custom L&Fs and any general
1750 * text rendering that wants to be consistent with these.
1751 * But by default on Solaris & Linux Swing will not use AA text over
1752 * remote X11 display (unless Xrender can be used which is TBD and may not
1753 * always be available anyway) as that is a noticeable performance hit.
1754 * So there needs to be a way to express that extra condition so that
1755 * it is seen by all clients of the desktop property API.
1756 * If this were the only condition it could be handled here as it would
1757 * be the same for any L&F and could reasonably be considered to be
1758 * a static behaviour of those systems.
1759 * But GTK currently has an additional test based on locale which is
1760 * not applied by Metal. So mixing GTK in a few locales with Metal
1761 * would mean the last one wins.
1762 * This could be stored per-app context which would work
1763 * for different applets, but wouldn't help for a single application
1764 * using GTK and some other L&F concurrently.
1765 * But it is expected this will be addressed within GTK and the font
1766 * system so is a temporary and somewhat unlikely harmless corner case.
1767 */
1768 public static void setAAFontSettingsCondition(boolean extraCondition) {
1769 if (extraCondition != lastExtraCondition) {
1770 lastExtraCondition = extraCondition;
1771 if (checkedSystemAAFontSettings) {
1772 /* Someone already asked for this info, under a different
1773 * condition.
1774 * We'll force re-evaluation instead of replicating the
1775 * logic, then notify any listeners of any change.
1776 */
1777 checkedSystemAAFontSettings = false;
1778 Toolkit tk = Toolkit.getDefaultToolkit();
1779 if (tk instanceof SunToolkit) {
1780 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1781 }
1782 }
1783 }
1784 }
1785
1786 /* "false", "off", ""default" aren't explicitly tested, they
1787 * just fall through to produce a null return which all are equated to
1788 * "false".
1789 */
1790 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1791 Object aaHint = null;
1792 hintname = hintname.toLowerCase(Locale.ENGLISH);
1793 if (hintname.equals("on")) {
1794 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1795 } else if (hintname.equals("gasp")) {
1796 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1797 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1798 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1799 } else if (hintname.equals("lcd_hbgr")) {
1800 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1801 } else if (hintname.equals("lcd_vrgb")) {
1802 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1803 } else if (hintname.equals("lcd_vbgr")) {
1804 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1805 }
1806 if (aaHint != null) {
1807 RenderingHints map = new RenderingHints(null);
1808 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1809 return map;
1810 } else {
1811 return null;
1812 }
1813 }
1814
1815 /* This method determines whether to use the system font settings,
1816 * or ignore them if a L&F has specified they should be ignored, or
1817 * to override both of these with a system property specified value.
1818 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1819 * system property isn't applied as desktop properties are considered
1820 * to be inapplicable in that case. In that headless case although
1821 * this method will return "true" the toolkit will return a null map.
1822 */
1823 private static boolean useSystemAAFontSettings() {
1824 if (!checkedSystemAAFontSettings) {
1825 useSystemAAFontSettings = true; /* initially set this true */
1826 String systemAAFonts = null;
1827 Toolkit tk = Toolkit.getDefaultToolkit();
1828 if (tk instanceof SunToolkit) {
1829 systemAAFonts =
1830 AccessController.doPrivileged(
1831 new GetPropertyAction("awt.useSystemAAFontSettings"));
1832 }
1833 if (systemAAFonts != null) {
1834 useSystemAAFontSettings =
1835 Boolean.valueOf(systemAAFonts).booleanValue();
1836 /* If it is anything other than "true", then it may be
1837 * a hint name , or it may be "off, "default", etc.
1838 */
1839 if (!useSystemAAFontSettings) {
1840 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1841 }
1842 }
1843 /* If its still true, apply the extra condition */
1844 if (useSystemAAFontSettings) {
1845 useSystemAAFontSettings = lastExtraCondition;
1846 }
1847 checkedSystemAAFontSettings = true;
1848 }
1849 return useSystemAAFontSettings;
1850 }
1851
1852 /* A variable defined for the convenience of JDK code */
1853 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1854
1855 /* Overridden by subclasses to return platform/desktop specific values */
1856 protected RenderingHints getDesktopAAHints() {
1857 return null;
1858 }
1859
1860 /* Subclass desktop property loading methods call this which
1861 * in turn calls the appropriate subclass implementation of
1862 * getDesktopAAHints() when system settings are being used.
1863 * Its public rather than protected because subclasses may delegate
1864 * to a helper class.
1865 */
1866 public static RenderingHints getDesktopFontHints() {
1867 if (useSystemAAFontSettings()) {
1868 Toolkit tk = Toolkit.getDefaultToolkit();
1869 if (tk instanceof SunToolkit) {
1870 Object map = ((SunToolkit)tk).getDesktopAAHints();
1871 return (RenderingHints)map;
1872 } else { /* Headless Toolkit */
1873 return null;
1874 }
1875 } else if (desktopFontHints != null) {
1876 /* cloning not necessary as the return value is cloned later, but
1877 * its harmless.
1878 */
1879 return (RenderingHints)(desktopFontHints.clone());
1880 } else {
1881 return null;
1882 }
1883 }
1884
1885
1886 public abstract boolean isDesktopSupported();
1887
1888 /*
1889 * consumeNextKeyTyped() method is not currently used,
1890 * however Swing could use it in the future.
1891 */
1892 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1893 try {
1894 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1895 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1896 getCurrentKeyboardFocusManager(),
1897 keyEvent);
1898 } catch (ClassCastException cce) {
1899 cce.printStackTrace();
1900 }
1901 }
1902
1903 protected static void dumpPeers(final PlatformLogger aLog) {
1904 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1905 }
1906
1907 /**
1908 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1909 * @return Window ancestor of the component or component by itself if it is Window;
1910 * null, if component is not a part of window hierarchy
1911 */
1912 public static Window getContainingWindow(Component comp) {
1913 while (comp != null && !(comp instanceof Window)) {
1914 comp = comp.getParent();
1915 }
1916 return (Window)comp;
1917 }
1918
1919 private static Boolean sunAwtDisableMixing = null;
1920
1921 /**
1922 * Returns the value of "sun.awt.disableMixing" property. Default
1923 * value is {@code false}.
1924 */
1925 public synchronized static boolean getSunAwtDisableMixing() {
1926 if (sunAwtDisableMixing == null) {
1927 sunAwtDisableMixing = AccessController.doPrivileged(
1928 new GetBooleanAction("sun.awt.disableMixing"));
1929 }
1930 return sunAwtDisableMixing.booleanValue();
1931 }
1932
1933 /**
1934 * Returns true if the native GTK libraries are available. The
1935 * default implementation returns false, but UNIXToolkit overrides this
1936 * method to provide a more specific answer.
1937 */
1938 public boolean isNativeGTKAvailable() {
1939 return false;
1940 }
1941
1942 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1943
1944 public synchronized void setWindowDeactivationTime(Window w, long time) {
1945 AppContext ctx = getAppContext(w);
1946 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1947 if (map == null) {
1948 map = new WeakHashMap<Window, Long>();
1949 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1950 }
1951 map.put(w, time);
1952 }
1953
1954 public synchronized long getWindowDeactivationTime(Window w) {
1955 AppContext ctx = getAppContext(w);
1956 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1957 if (map == null) {
1958 return -1;
1959 }
1960 Long time = map.get(w);
1961 return time == null ? -1 : time;
1962 }
1963
1964 // Cosntant alpha
1965 public boolean isWindowOpacitySupported() {
1966 return false;
1967 }
1968
1969 // Shaping
1970 public boolean isWindowShapingSupported() {
1971 return false;
1972 }
1973
1974 // Per-pixel alpha
1975 public boolean isWindowTranslucencySupported() {
1976 return false;
1977 }
1978
1979 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1980 return false;
1981 }
1982
1983 /**
1984 * Returns true if swing backbuffer should be translucent.
1985 */
1986 public boolean isSwingBackbufferTranslucencySupported() {
1987 return false;
1988 }
1989
1990 /**
1991 * Returns whether or not a containing top level window for the passed
1992 * component is
1993 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1994 *
1995 * @param c a Component which toplevel's to check
1996 * @return {@code true} if the passed component is not null and has a
1997 * containing toplevel window which is opaque (so per-pixel translucency
1998 * is not enabled), {@code false} otherwise
1999 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
2000 */
2001 public static boolean isContainingTopLevelOpaque(Component c) {
2002 Window w = getContainingWindow(c);
2003 return w != null && w.isOpaque();
2004 }
2005
2006 /**
2007 * Returns whether or not a containing top level window for the passed
2008 * component is
2009 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2010 *
2011 * @param c a Component which toplevel's to check
2012 * @return {@code true} if the passed component is not null and has a
2013 * containing toplevel window which has opacity less than
2014 * 1.0f (which means that it is translucent), {@code false} otherwise
2015 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2016 */
2017 public static boolean isContainingTopLevelTranslucent(Component c) {
2018 Window w = getContainingWindow(c);
2019 return w != null && w.getOpacity() < 1.0f;
2020 }
2021
2022 /**
2023 * Returns whether the native system requires using the peer.updateWindow()
2024 * method to update the contents of a non-opaque window, or if usual
2025 * painting procedures are sufficient. The default return value covers
2026 * the X11 systems. On MS Windows this method is overriden in WToolkit
2027 * to return true.
2028 */
2029 public boolean needUpdateWindow() {
2030 return false;
2031 }
2032
2033 /**
2034 * Descendants of the SunToolkit should override and put their own logic here.
2035 */
2036 public int getNumberOfButtons(){
2037 return 3;
2038 }
2039
2040 /**
2041 * Checks that the given object implements/extends the given
2042 * interface/class.
2043 *
2044 * Note that using the instanceof operator causes a class to be loaded.
2045 * Using this method doesn't load a class and it can be used instead of
2046 * the instanceof operator for performance reasons.
2047 *
2048 * @param obj Object to be checked
2049 * @param type The name of the interface/class. Must be
2050 * fully-qualified interface/class name.
2051 * @return true, if this object implements/extends the given
2052 * interface/class, false, otherwise, or if obj or type is null
2053 */
2054 public static boolean isInstanceOf(Object obj, String type) {
2055 if (obj == null) return false;
2056 if (type == null) return false;
2057
2058 return isInstanceOf(obj.getClass(), type);
2059 }
2060
2061 private static boolean isInstanceOf(Class<?> cls, String type) {
2062 if (cls == null) return false;
2063
2064 if (cls.getName().equals(type)) {
2065 return true;
2066 }
2067
2068 for (Class<?> c : cls.getInterfaces()) {
2069 if (c.getName().equals(type)) {
2070 return true;
2071 }
2072 }
2073 return isInstanceOf(cls.getSuperclass(), type);
2074 }
2075
2076 protected static LightweightFrame getLightweightFrame(Component c) {
2077 for (; c != null; c = c.getParent()) {
2078 if (c instanceof LightweightFrame) {
2079 return (LightweightFrame)c;
2080 }
2081 if (c instanceof Window) {
2082 // Don't traverse owner windows
2083 return null;
2084 }
2085 }
2086 return null;
2087 }
2088
2089 ///////////////////////////////////////////////////////////////////////////
2090 //
2091 // The following methods help set and identify whether a particular
2092 // AWTEvent object was produced by the system or by user code. As of this
2093 // writing the only consumer is the Java Plug-In, although this information
2094 // could be useful to more clients and probably should be formalized in
2095 // the public API.
2096 //
2097 ///////////////////////////////////////////////////////////////////////////
2098
2099 public static void setSystemGenerated(AWTEvent e) {
2100 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2101 }
2102
2103 public static boolean isSystemGenerated(AWTEvent e) {
2104 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2105 }
2106
2107 } // class SunToolkit
2108
2109
2110 /*
2111 * PostEventQueue is a Thread that runs in the same AppContext as the
2112 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2113 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2114 * events to this queue, which then calls EventQueue.postEvent().
2115 *
2116 * We do this because EventQueue.postEvent() may be overridden by client
2117 * code, and we mustn't ever call client code from the toolkit thread.
2118 */
2119 class PostEventQueue {
2120 private EventQueueItem queueHead = null;
2121 private EventQueueItem queueTail = null;
2122 private final EventQueue eventQueue;
2123
2124 private Thread flushThread = null;
2125
2126 PostEventQueue(EventQueue eq) {
2127 eventQueue = eq;
2128 }
2129
2130 /*
2131 * Continually post pending AWTEvents to the Java EventQueue. The method
2132 * is synchronized to ensure the flush is completed before a new event
2133 * can be posted to this queue.
2134 *
2135 * 7177040: The method couldn't be wholly synchronized because of calls
2136 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2137 * potentially lead to deadlock
2138 */
2139 public void flush() {
2140
2141 Thread newThread = Thread.currentThread();
2142
2143 try {
2144 EventQueueItem tempQueue;
2145 synchronized (this) {
2146 // Avoid method recursion
2147 if (newThread == flushThread) {
2148 return;
2149 }
2150 // Wait for other threads' flushing
2151 while (flushThread != null) {
2152 wait();
2153 }
2154 // Skip everything if queue is empty
2155 if (queueHead == null) {
2156 return;
2157 }
2158 // Remember flushing thread
2159 flushThread = newThread;
2160
2161 tempQueue = queueHead;
2162 queueHead = queueTail = null;
2163 }
2164 try {
2165 while (tempQueue != null) {
2166 eventQueue.postEvent(tempQueue.event);
2167 tempQueue = tempQueue.next;
2168 }
2169 }
2170 finally {
2171 // Only the flushing thread can get here
2172 synchronized (this) {
2173 // Forget flushing thread, inform other pending threads
2174 flushThread = null;
2175 notifyAll();
2176 }
2177 }
2178 }
2179 catch (InterruptedException e) {
2180 // Couldn't allow exception go up, so at least recover the flag
2181 newThread.interrupt();
2182 }
2183 }
2184
2185 /*
2186 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2187 */
2188 void postEvent(AWTEvent event) {
2189 EventQueueItem item = new EventQueueItem(event);
2190
2191 synchronized (this) {
2192 if (queueHead == null) {
2193 queueHead = queueTail = item;
2194 } else {
2195 queueTail.next = item;
2196 queueTail = item;
2197 }
2198 }
2199 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2200 }
2201 } // class PostEventQueue