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 };
74
75 /**
76 * Special mask for the UngrabEvent events, in addition to the
77 * public masks defined in AWTEvent. Should be used as the mask
78 * value for Toolkit.addAWTEventListener.
79 */
80 public static final int GRAB_EVENT_MASK = 0x80000000;
81
82 /* The key to put()/get() the PostEventQueue into/from the AppContext.
83 */
84 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue";
85
86 /**
87 * Number of buttons.
88 * By default it's taken from the system. If system value does not
89 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value.
90 */
91 protected static int numberOfButtons = 0;
92
93
94 /* XFree standard mention 24 buttons as maximum:
95 * http://www.xfree86.org/current/mouse.4.html
96 * We workaround systems supporting more than 24 buttons.
97 * Otherwise, we have to use long type values as masks
98 * which leads to API change.
99 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to
100 * the 4-bytes limit for the int type. (CR 6799099)
101 * One more bit is reserved for FIRST_HIGH_BIT.
102 */
103 public final static int MAX_BUTTONS_SUPPORTED = 20;
104
105 /**
106 * Creates and initializes EventQueue instance for the specified
107 * AppContext.
108 * Note that event queue must be created from createNewAppContext()
109 * only in order to ensure that EventQueue constructor obtains
110 * the correct AppContext.
111 * @param appContext AppContext to associate with the event queue
112 */
113 private static void initEQ(AppContext appContext) {
114 EventQueue eventQueue;
115
116 String eqName = System.getProperty("AWT.EventQueueClass",
117 "java.awt.EventQueue");
118
119 try {
120 eventQueue = (EventQueue)Class.forName(eqName).newInstance();
121 } catch (Exception e) {
122 e.printStackTrace();
123 System.err.println("Failed loading " + eqName + ": " + e);
124 eventQueue = new EventQueue();
125 }
126 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue);
127
128 PostEventQueue postEventQueue = new PostEventQueue(eventQueue);
129 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue);
130 }
131
132 public SunToolkit() {
133 }
134
135 public boolean useBufferPerWindow() {
136 return false;
137 }
138
139 public abstract WindowPeer createWindow(Window target)
140 throws HeadlessException;
141
142 public abstract FramePeer createFrame(Frame target)
143 throws HeadlessException;
144
145 public abstract FramePeer createLightweightFrame(LightweightFrame target)
146 throws HeadlessException;
147
148 public abstract DialogPeer createDialog(Dialog target)
149 throws HeadlessException;
150
151 public abstract ButtonPeer createButton(Button target)
152 throws HeadlessException;
153
154 public abstract TextFieldPeer createTextField(TextField target)
155 throws HeadlessException;
156
157 public abstract ChoicePeer createChoice(Choice target)
158 throws HeadlessException;
159
160 public abstract LabelPeer createLabel(Label target)
161 throws HeadlessException;
162
163 public abstract ListPeer createList(java.awt.List target)
164 throws HeadlessException;
165
166 public abstract CheckboxPeer createCheckbox(Checkbox target)
167 throws HeadlessException;
168
169 public abstract ScrollbarPeer createScrollbar(Scrollbar target)
170 throws HeadlessException;
171
172 public abstract ScrollPanePeer createScrollPane(ScrollPane target)
173 throws HeadlessException;
174
175 public abstract TextAreaPeer createTextArea(TextArea target)
176 throws HeadlessException;
177
178 public abstract FileDialogPeer createFileDialog(FileDialog target)
179 throws HeadlessException;
180
181 public abstract MenuBarPeer createMenuBar(MenuBar target)
182 throws HeadlessException;
183
184 public abstract MenuPeer createMenu(Menu target)
185 throws HeadlessException;
186
187 public abstract PopupMenuPeer createPopupMenu(PopupMenu target)
188 throws HeadlessException;
189
190 public abstract MenuItemPeer createMenuItem(MenuItem target)
191 throws HeadlessException;
192
193 public abstract CheckboxMenuItemPeer createCheckboxMenuItem(
194 CheckboxMenuItem target)
195 throws HeadlessException;
196
197 public abstract DragSourceContextPeer createDragSourceContextPeer(
198 DragGestureEvent dge)
199 throws InvalidDnDOperationException;
200
201 public abstract TrayIconPeer createTrayIcon(TrayIcon target)
202 throws HeadlessException, AWTException;
203
204 public abstract SystemTrayPeer createSystemTray(SystemTray target);
205
206 public abstract boolean isTraySupported();
207
208 @SuppressWarnings("deprecation")
209 public abstract FontPeer getFontPeer(String name, int style);
210
211 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen)
212 throws AWTException;
213
214 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer()
215 throws HeadlessException;
216
217 /**
218 * The AWT lock is typically only used on Unix platforms to synchronize
219 * access to Xlib, OpenGL, etc. However, these methods are implemented
220 * in SunToolkit so that they can be called from shared code (e.g.
221 * from the OGL pipeline) or from the X11 pipeline regardless of whether
222 * XToolkit or MToolkit is currently in use. There are native macros
223 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these
224 * methods is changed, make sure it is compatible with the native macros.
225 *
226 * Note: The following methods (awtLock(), awtUnlock(), etc) should be
227 * used in place of:
228 * synchronized (getAWTLock()) {
229 * ...
230 * }
231 *
232 * By factoring these methods out specially, we are able to change the
233 * implementation of these methods (e.g. use more advanced locking
234 * mechanisms) without impacting calling code.
235 *
236 * Sample usage:
237 * private void doStuffWithXlib() {
238 * assert !SunToolkit.isAWTLockHeldByCurrentThread();
239 * SunToolkit.awtLock();
240 * try {
241 * ...
242 * XlibWrapper.XDoStuff();
243 * } finally {
244 * SunToolkit.awtUnlock();
245 * }
246 * }
247 */
248
249 private static final ReentrantLock AWT_LOCK = new ReentrantLock();
250 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition();
251
252 public static final void awtLock() {
253 AWT_LOCK.lock();
254 }
255
256 public static final boolean awtTryLock() {
257 return AWT_LOCK.tryLock();
258 }
259
260 public static final void awtUnlock() {
261 AWT_LOCK.unlock();
262 }
263
264 public static final void awtLockWait()
265 throws InterruptedException
266 {
267 AWT_LOCK_COND.await();
268 }
269
270 public static final void awtLockWait(long timeout)
271 throws InterruptedException
272 {
273 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS);
274 }
275
276 public static final void awtLockNotify() {
277 AWT_LOCK_COND.signal();
278 }
279
280 public static final void awtLockNotifyAll() {
281 AWT_LOCK_COND.signalAll();
282 }
283
284 public static final boolean isAWTLockHeldByCurrentThread() {
285 return AWT_LOCK.isHeldByCurrentThread();
286 }
287
288 /*
289 * Create a new AppContext, along with its EventQueue, for a
290 * new ThreadGroup. Browser code, for example, would use this
291 * method to create an AppContext & EventQueue for an Applet.
292 */
293 public static AppContext createNewAppContext() {
294 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
295 return createNewAppContext(threadGroup);
296 }
297
298 static final AppContext createNewAppContext(ThreadGroup threadGroup) {
299 // Create appContext before initialization of EventQueue, so all
300 // the calls to AppContext.getAppContext() from EventQueue ctor
301 // return correct values
302 AppContext appContext = new AppContext(threadGroup);
303 initEQ(appContext);
304
305 return appContext;
306 }
307
308 static void wakeupEventQueue(EventQueue q, boolean isShutdown){
309 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown);
310 }
311
312 /*
313 * Fetch the peer associated with the given target (as specified
314 * in the peer creation method). This can be used to determine
315 * things like what the parent peer is. If the target is null
316 * or the target can't be found (either because the a peer was
317 * never created for it or the peer was disposed), a null will
318 * be returned.
319 */
320 protected static Object targetToPeer(Object target) {
321 if (target != null && !GraphicsEnvironment.isHeadless()) {
322 return AWTAutoShutdown.getInstance().getPeer(target);
323 }
324 return null;
325 }
326
327 protected static void targetCreatedPeer(Object target, Object peer) {
328 if (target != null && peer != null &&
329 !GraphicsEnvironment.isHeadless())
330 {
331 AWTAutoShutdown.getInstance().registerPeer(target, peer);
332 }
333 }
334
335 protected static void targetDisposedPeer(Object target, Object peer) {
336 if (target != null && peer != null &&
337 !GraphicsEnvironment.isHeadless())
338 {
339 AWTAutoShutdown.getInstance().unregisterPeer(target, peer);
340 }
341 }
342
343 // Maps from non-Component/MenuComponent to AppContext.
344 // WeakHashMap<Component,AppContext>
345 private static final Map<Object, AppContext> appContextMap =
346 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>());
347
348 /**
349 * Sets the appContext field of target. If target is not a Component or
350 * MenuComponent, this returns false.
351 */
352 private static boolean setAppContext(Object target,
353 AppContext context) {
354 if (target instanceof Component) {
355 AWTAccessor.getComponentAccessor().
356 setAppContext((Component)target, context);
357 } else if (target instanceof MenuComponent) {
358 AWTAccessor.getMenuComponentAccessor().
359 setAppContext((MenuComponent)target, context);
360 } else {
361 return false;
362 }
363 return true;
364 }
365
366 /**
367 * Returns the appContext field for target. If target is not a
368 * Component or MenuComponent this returns null.
369 */
370 private static AppContext getAppContext(Object target) {
371 if (target instanceof Component) {
372 return AWTAccessor.getComponentAccessor().
373 getAppContext((Component)target);
374 } else if (target instanceof MenuComponent) {
375 return AWTAccessor.getMenuComponentAccessor().
376 getAppContext((MenuComponent)target);
377 } else {
378 return null;
379 }
380 }
381
382 /*
383 * Fetch the AppContext associated with the given target.
384 * This can be used to determine things like which EventQueue
385 * to use for posting events to a Component. If the target is
386 * null or the target can't be found, a null with be returned.
387 */
388 public static AppContext targetToAppContext(Object target) {
389 if (target == null) {
390 return null;
391 }
392 AppContext context = getAppContext(target);
393 if (context == null) {
394 // target is not a Component/MenuComponent, try the
395 // appContextMap.
396 context = appContextMap.get(target);
397 }
398 return context;
399 }
400
401 /**
402 * Sets the synchronous status of focus requests on lightweight
403 * components in the specified window to the specified value.
404 * If the boolean parameter is <code>true</code> then the focus
405 * requests on lightweight components will be performed
406 * synchronously, if it is <code>false</code>, then asynchronously.
407 * By default, all windows have their lightweight request status
408 * set to asynchronous.
409 * <p>
410 * The application can only set the status of lightweight focus
411 * requests to synchronous for any of its windows if it doesn't
412 * perform focus transfers between different heavyweight containers.
413 * In this case the observable focus behaviour is the same as with
414 * asynchronous status.
415 * <p>
416 * If the application performs focus transfer between different
417 * heavyweight containers and sets the lightweight focus request
418 * status to synchronous for any of its windows, then further focus
419 * behaviour is unspecified.
420 * <p>
421 * @param w window for which the lightweight focus request status
422 * should be set
423 * @param status the value of lightweight focus request status
424 */
425
426 public static void setLWRequestStatus(Window changed,boolean status){
427 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status);
428 };
429
430 public static void checkAndSetPolicy(Container cont) {
431 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager.
432 getCurrentKeyboardFocusManager().
433 getDefaultFocusTraversalPolicy();
434
435 cont.setFocusTraversalPolicy(defaultPolicy);
436 }
437
438 private static FocusTraversalPolicy createLayoutPolicy() {
439 FocusTraversalPolicy policy = null;
440 try {
441 Class<?> layoutPolicyClass =
442 Class.forName("javax.swing.LayoutFocusTraversalPolicy");
443 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance();
444 }
445 catch (ClassNotFoundException e) {
446 assert false;
447 }
448 catch (InstantiationException e) {
449 assert false;
450 }
451 catch (IllegalAccessException e) {
452 assert false;
453 }
454
455 return policy;
456 }
457
458 /*
459 * Insert a mapping from target to AppContext, for later retrieval
460 * via targetToAppContext() above.
461 */
462 public static void insertTargetMapping(Object target, AppContext appContext) {
463 if (!setAppContext(target, appContext)) {
464 // Target is not a Component/MenuComponent, use the private Map
465 // instead.
466 appContextMap.put(target, appContext);
467 }
468 }
469
470 /*
471 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue
472 * to avoid possibly calling client code (EventQueueSubclass.postEvent())
473 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should
474 * not be called under another lock since it locks the EventQueue.
475 * See bugids 4632918, 4526597.
476 */
477 public static void postEvent(AppContext appContext, AWTEvent event) {
478 if (event == null) {
479 throw new NullPointerException();
480 }
481
482 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor();
483 if (sea != null && sea.isSequencedEvent(event)) {
484 AWTEvent nested = sea.getNested(event);
485 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS &&
486 nested instanceof TimedWindowEvent)
487 {
488 TimedWindowEvent twe = (TimedWindowEvent)nested;
489 ((SunToolkit)Toolkit.getDefaultToolkit()).
490 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen());
491 }
492 }
493
494 // All events posted via this method are system-generated.
495 // Placing the following call here reduces considerably the
496 // number of places throughout the toolkit that would
497 // otherwise have to be modified to precisely identify
498 // system-generated events.
499 setSystemGenerated(event);
500 AppContext eventContext = targetToAppContext(event.getSource());
501 if (eventContext != null && !eventContext.equals(appContext)) {
502 throw new RuntimeException("Event posted on wrong app context : " + event);
503 }
504 PostEventQueue postEventQueue =
505 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
506 if (postEventQueue != null) {
507 postEventQueue.postEvent(event);
508 }
509 }
510
511 /*
512 * Post AWTEvent of high priority.
513 */
514 public static void postPriorityEvent(final AWTEvent e) {
515 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() {
516 public void run() {
517 AWTAccessor.getAWTEventAccessor().setPosted(e);
518 ((Component)e.getSource()).dispatchEvent(e);
519 }
520 }, PeerEvent.ULTIMATE_PRIORITY_EVENT);
521 postEvent(targetToAppContext(e.getSource()), pe);
522 }
523
524 /*
525 * Flush any pending events which haven't been posted to the AWT
526 * EventQueue yet.
527 */
528 public static void flushPendingEvents() {
529 AppContext appContext = AppContext.getAppContext();
530 flushPendingEvents(appContext);
531 }
532
533 /*
534 * Flush the PostEventQueue for the right AppContext.
535 * The default flushPendingEvents only flushes the thread-local context,
536 * which is not always correct, c.f. 3746956
537 */
538 public static void flushPendingEvents(AppContext appContext) {
539 PostEventQueue postEventQueue =
540 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY);
541 if (postEventQueue != null) {
542 postEventQueue.flush();
543 }
544 }
545
546 /*
547 * Execute a chunk of code on the Java event handler thread for the
548 * given target. Does not wait for the execution to occur before
549 * returning to the caller.
550 */
551 public static void executeOnEventHandlerThread(Object target,
552 Runnable runnable) {
553 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT));
554 }
555
556 /*
557 * Fixed 5064013: the InvocationEvent time should be equals
558 * the time of the ActionEvent
559 */
560 @SuppressWarnings("serial")
561 public static void executeOnEventHandlerThread(Object target,
562 Runnable runnable,
563 final long when) {
564 executeOnEventHandlerThread(
565 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) {
566 public long getWhen() {
567 return when;
568 }
569 });
570 }
571
572 /*
573 * Execute a chunk of code on the Java event handler thread for the
574 * given target. Does not wait for the execution to occur before
575 * returning to the caller.
576 */
577 public static void executeOnEventHandlerThread(PeerEvent peerEvent) {
578 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent);
579 }
580
581 /*
582 * Execute a chunk of code on the Java event handler thread. The
583 * method takes into account provided AppContext and sets
584 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the
585 * event. See 6451487 for detailes.
586 * Does not wait for the execution to occur before returning to
587 * the caller.
588 */
589 public static void invokeLaterOnAppContext(
590 AppContext appContext, Runnable dispatcher)
591 {
592 postEvent(appContext,
593 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher,
594 PeerEvent.PRIORITY_EVENT));
595 }
596
597 /*
598 * Execute a chunk of code on the Java event handler thread for the
599 * given target. Waits for the execution to occur before returning
600 * to the caller.
601 */
602 public static void executeOnEDTAndWait(Object target, Runnable runnable)
603 throws InterruptedException, InvocationTargetException
604 {
605 if (EventQueue.isDispatchThread()) {
606 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread");
607 }
608
609 class AWTInvocationLock {}
610 Object lock = new AWTInvocationLock();
611
612 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT);
613
614 synchronized (lock) {
615 executeOnEventHandlerThread(event);
616 while(!event.isDispatched()) {
617 lock.wait();
618 }
619 }
620
621 Throwable eventThrowable = event.getThrowable();
622 if (eventThrowable != null) {
623 throw new InvocationTargetException(eventThrowable);
624 }
625 }
626
627 /*
628 * Returns true if the calling thread is the event dispatch thread
629 * contained within AppContext which associated with the given target.
630 * Use this call to ensure that a given task is being executed
631 * (or not being) on the event dispatch thread for the given target.
632 */
633 public static boolean isDispatchThreadForAppContext(Object target) {
634 AppContext appContext = targetToAppContext(target);
635 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
636
637 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor();
638 return accessor.isDispatchThreadImpl(eq);
639 }
640
641 public Dimension getScreenSize() {
642 return new Dimension(getScreenWidth(), getScreenHeight());
643 }
644 protected abstract int getScreenWidth();
645 protected abstract int getScreenHeight();
646
647 @SuppressWarnings("deprecation")
648 public FontMetrics getFontMetrics(Font font) {
649 return FontDesignMetrics.getMetrics(font);
650 }
651
652 @SuppressWarnings("deprecation")
653 public String[] getFontList() {
654 String[] hardwiredFontList = {
655 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED,
656 Font.DIALOG_INPUT
657
658 // -- Obsolete font names from 1.0.2. It was decided that
659 // -- getFontList should not return these old names:
660 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats"
661 };
662 return hardwiredFontList;
663 }
664
665 public PanelPeer createPanel(Panel target) {
666 return (PanelPeer)createComponent(target);
667 }
668
669 public CanvasPeer createCanvas(Canvas target) {
670 return (CanvasPeer)createComponent(target);
671 }
672
673 /**
674 * Disables erasing of background on the canvas before painting if
675 * this is supported by the current toolkit. It is recommended to
676 * call this method early, before the Canvas becomes displayable,
677 * because some Toolkit implementations do not support changing
678 * this property once the Canvas becomes displayable.
679 */
680 public void disableBackgroundErase(Canvas canvas) {
681 disableBackgroundEraseImpl(canvas);
682 }
683
684 /**
685 * Disables the native erasing of the background on the given
686 * component before painting if this is supported by the current
687 * toolkit. This only has an effect for certain components such as
688 * Canvas, Panel and Window. It is recommended to call this method
689 * early, before the Component becomes displayable, because some
690 * Toolkit implementations do not support changing this property
691 * once the Component becomes displayable.
692 */
693 public void disableBackgroundErase(Component component) {
694 disableBackgroundEraseImpl(component);
695 }
696
697 private void disableBackgroundEraseImpl(Component component) {
698 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true);
699 }
700
701 /**
702 * Returns the value of "sun.awt.noerasebackground" property. Default
703 * value is {@code false}.
704 */
705 public static boolean getSunAwtNoerasebackground() {
706 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground"));
707 }
708
709 /**
710 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default
711 * value is {@code false}.
712 */
713 public static boolean getSunAwtErasebackgroundonresize() {
714 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize"));
715 }
716
717
718 static final SoftCache imgCache = new SoftCache();
719
720 static Image getImageFromHash(Toolkit tk, URL url) {
721 checkPermissions(url);
722 synchronized (imgCache) {
723 Image img = (Image)imgCache.get(url);
724 if (img == null) {
725 try {
726 img = tk.createImage(new URLImageSource(url));
727 imgCache.put(url, img);
728 } catch (Exception e) {
729 }
730 }
731 return img;
732 }
733 }
734
735 static Image getImageFromHash(Toolkit tk,
736 String filename) {
737 checkPermissions(filename);
738 synchronized (imgCache) {
739 Image img = (Image)imgCache.get(filename);
740 if (img == null) {
741 try {
742 img = tk.createImage(new FileImageSource(filename));
743 imgCache.put(filename, img);
744 } catch (Exception e) {
745 }
746 }
747 return img;
748 }
749 }
750
751 public Image getImage(String filename) {
752 return getImageFromHash(this, filename);
753 }
754
755 public Image getImage(URL url) {
756 return getImageFromHash(this, url);
757 }
758
759 protected Image getImageWithResolutionVariant(String fileName,
760 String resolutionVariantName) {
761 synchronized (imgCache) {
762 Image image = getImageFromHash(this, fileName);
763 if (image instanceof MultiResolutionImage) {
764 return image;
765 }
766 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
767 image = createImageWithResolutionVariant(image, resolutionVariant);
768 imgCache.put(fileName, image);
769 return image;
770 }
771 }
772
773 protected Image getImageWithResolutionVariant(URL url,
774 URL resolutionVariantURL) {
775 synchronized (imgCache) {
776 Image image = getImageFromHash(this, url);
777 if (image instanceof MultiResolutionImage) {
778 return image;
779 }
780 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
781 image = createImageWithResolutionVariant(image, resolutionVariant);
782 imgCache.put(url, image);
783 return image;
784 }
785 }
786
787
788 public Image createImage(String filename) {
789 checkPermissions(filename);
790 return createImage(new FileImageSource(filename));
791 }
792
793 public Image createImage(URL url) {
794 checkPermissions(url);
795 return createImage(new URLImageSource(url));
796 }
797
798 public Image createImage(byte[] data, int offset, int length) {
799 return createImage(new ByteArrayImageSource(data, offset, length));
800 }
801
802 public Image createImage(ImageProducer producer) {
803 return new ToolkitImage(producer);
804 }
805
806 public static Image createImageWithResolutionVariant(Image image,
807 Image resolutionVariant) {
808 return new MultiResolutionToolkitImage(image, resolutionVariant);
809 }
810
811 public int checkImage(Image img, int w, int h, ImageObserver o) {
812 if (!(img instanceof ToolkitImage)) {
813 return ImageObserver.ALLBITS;
814 }
815
816 ToolkitImage tkimg = (ToolkitImage)img;
817 int repbits;
818 if (w == 0 || h == 0) {
819 repbits = ImageObserver.ALLBITS;
820 } else {
821 repbits = tkimg.getImageRep().check(o);
822 }
823 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
824 }
825
826 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
827 if (w == 0 || h == 0) {
828 return true;
829 }
830
831 // Must be a ToolkitImage
832 if (!(img instanceof ToolkitImage)) {
833 return true;
834 }
835
836 ToolkitImage tkimg = (ToolkitImage)img;
837 if (tkimg.hasError()) {
838 if (o != null) {
839 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
840 -1, -1, -1, -1);
841 }
842 return false;
843 }
844 ImageRepresentation ir = tkimg.getImageRep();
845 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
846 }
847
848 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
849 ToolkitImage rvImage = getResolutionVariant(img);
850 int rvw = getRVSize(w);
851 int rvh = getRVSize(h);
852 // Ignore the resolution variant in case of error
853 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
854 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
855 getResolutionVariantObserver(
856 img, o, w, h, rvw, rvh, true));
857 }
858
859 private boolean prepareResolutionVariant(Image img, int w, int h,
860 ImageObserver o) {
861
862 ToolkitImage rvImage = getResolutionVariant(img);
863 int rvw = getRVSize(w);
864 int rvh = getRVSize(h);
865 // Ignore the resolution variant in case of error
866 return rvImage == null || rvImage.hasError() || prepareImage(
867 rvImage, rvw, rvh,
868 MultiResolutionToolkitImage.getResolutionVariantObserver(
869 img, o, w, h, rvw, rvh, true));
870 }
871
872 private static int getRVSize(int size){
873 return size == -1 ? -1 : 2 * size;
874 }
875
876 private static ToolkitImage getResolutionVariant(Image image) {
877 if (image instanceof MultiResolutionToolkitImage) {
878 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
879 getResolutionVariant();
880 if (resolutionVariant instanceof ToolkitImage) {
881 return (ToolkitImage) resolutionVariant;
882 }
883 }
884 return null;
885 }
886
887 protected static boolean imageCached(Object key) {
888 return imgCache.containsKey(key);
889 }
890
891 protected static boolean imageExists(String filename) {
892 if (filename != null) {
893 checkPermissions(filename);
894 return new File(filename).exists();
895 }
896 return false;
897 }
898
899 @SuppressWarnings("try")
900 protected static boolean imageExists(URL url) {
901 if (url != null) {
902 checkPermissions(url);
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 URLUtil.getConnectPermission(url);
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(
1133 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1134 }
1135 } catch (SecurityException se) {
1136 // There is no permission to show popups over the task bar
1137 result = false;
1138 }
1139 return result;
1140 }
1141
1142 /**
1143 * Returns a new input method window, with behavior as specified in
1144 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1145 * If the inputContext is not null, the window should return it from its
1146 * getInputContext() method. The window needs to implement
1147 * sun.awt.im.InputMethodWindow.
1148 * <p>
1149 * SunToolkit subclasses can override this method to return better input
1150 * method windows.
1151 */
1152 public Window createInputMethodWindow(String title, InputContext context) {
1153 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1154 }
1155
1156 /**
1157 * Returns whether enableInputMethods should be set to true for peered
1158 * TextComponent instances on this platform. False by default.
1159 */
1160 public boolean enableInputMethodsForTextComponent() {
1161 return false;
1162 }
1163
1164 private static Locale startupLocale = null;
1165
1166 /**
1167 * Returns the locale in which the runtime was started.
1168 */
1169 public static Locale getStartupLocale() {
1170 if (startupLocale == null) {
1171 String language, region, country, variant;
1172 language = AccessController.doPrivileged(
1173 new GetPropertyAction("user.language", "en"));
1174 // for compatibility, check for old user.region property
1175 region = AccessController.doPrivileged(
1176 new GetPropertyAction("user.region"));
1177 if (region != null) {
1178 // region can be of form country, country_variant, or _variant
1179 int i = region.indexOf('_');
1180 if (i >= 0) {
1181 country = region.substring(0, i);
1182 variant = region.substring(i + 1);
1183 } else {
1184 country = region;
1185 variant = "";
1186 }
1187 } else {
1188 country = AccessController.doPrivileged(
1189 new GetPropertyAction("user.country", ""));
1190 variant = AccessController.doPrivileged(
1191 new GetPropertyAction("user.variant", ""));
1192 }
1193 startupLocale = new Locale(language, country, variant);
1194 }
1195 return startupLocale;
1196 }
1197
1198 /**
1199 * Returns the default keyboard locale of the underlying operating system
1200 */
1201 public Locale getDefaultKeyboardLocale() {
1202 return getStartupLocale();
1203 }
1204
1205 // Support for window closing event notifications
1206 private transient WindowClosingListener windowClosingListener = null;
1207 /**
1208 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1209 */
1210 public WindowClosingListener getWindowClosingListener() {
1211 return windowClosingListener;
1212 }
1213 /**
1214 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1215 */
1216 public void setWindowClosingListener(WindowClosingListener wcl) {
1217 windowClosingListener = wcl;
1218 }
1219
1220 /**
1221 * @see sun.awt.WindowClosingListener#windowClosingNotify
1222 */
1223 public RuntimeException windowClosingNotify(WindowEvent event) {
1224 if (windowClosingListener != null) {
1225 return windowClosingListener.windowClosingNotify(event);
1226 } else {
1227 return null;
1228 }
1229 }
1230 /**
1231 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1232 */
1233 public RuntimeException windowClosingDelivered(WindowEvent event) {
1234 if (windowClosingListener != null) {
1235 return windowClosingListener.windowClosingDelivered(event);
1236 } else {
1237 return null;
1238 }
1239 }
1240
1241 private static DefaultMouseInfoPeer mPeer = null;
1242
1243 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1244 if (mPeer == null) {
1245 mPeer = new DefaultMouseInfoPeer();
1246 }
1247 return mPeer;
1248 }
1249
1250
1251 /**
1252 * Returns whether default toolkit needs the support of the xembed
1253 * from embedding host(if any).
1254 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1255 */
1256 public static boolean needsXEmbed() {
1257 String noxembed = AccessController.
1258 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1259 if ("true".equals(noxembed)) {
1260 return false;
1261 }
1262
1263 Toolkit tk = Toolkit.getDefaultToolkit();
1264 if (tk instanceof SunToolkit) {
1265 // SunToolkit descendants should override this method to specify
1266 // concrete behavior
1267 return ((SunToolkit)tk).needsXEmbedImpl();
1268 } else {
1269 // Non-SunToolkit doubtly might support XEmbed
1270 return false;
1271 }
1272 }
1273
1274 /**
1275 * Returns whether this toolkit needs the support of the xembed
1276 * from embedding host(if any).
1277 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1278 */
1279 protected boolean needsXEmbedImpl() {
1280 return false;
1281 }
1282
1283 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1284
1285 /**
1286 * Returns whether the XEmbed server feature is requested by
1287 * developer. If true, Toolkit should return an
1288 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1289 */
1290 protected final boolean isXEmbedServerRequested() {
1291 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1292 }
1293
1294 /**
1295 * Returns whether the modal exclusion API is supported by the current toolkit.
1296 * When it isn't supported, calling <code>setModalExcluded</code> has no
1297 * effect, and <code>isModalExcluded</code> returns false for all windows.
1298 *
1299 * @return true if modal exclusion is supported by the toolkit, false otherwise
1300 *
1301 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1302 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1303 *
1304 * @since 1.5
1305 */
1306 public static boolean isModalExcludedSupported()
1307 {
1308 Toolkit tk = Toolkit.getDefaultToolkit();
1309 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1310 }
1311 /*
1312 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1313 *
1314 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1315 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1316 *
1317 * @since 1.5
1318 */
1319 protected boolean isModalExcludedSupportedImpl()
1320 {
1321 return false;
1322 }
1323
1324 /*
1325 * Sets this window to be excluded from being modally blocked. When the
1326 * toolkit supports modal exclusion and this method is called, input
1327 * events, focus transfer and z-order will continue to work for the
1328 * window, it's owned windows and child components, even in the
1329 * presence of a modal dialog.
1330 * For details on which <code>Window</code>s are normally blocked
1331 * by modal dialog, see {@link java.awt.Dialog}.
1332 * Invoking this method when the modal exclusion API is not supported by
1333 * the current toolkit has no effect.
1334 * @param window Window to be marked as not modally blocked
1335 * @see java.awt.Dialog
1336 * @see java.awt.Dialog#setModal(boolean)
1337 * @see sun.awt.SunToolkit#isModalExcludedSupported
1338 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1339 */
1340 public static void setModalExcluded(Window window)
1341 {
1342 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1343 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1344 }
1345 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1346 }
1347
1348 /*
1349 * Returns whether the specified window is blocked by modal dialogs.
1350 * If the modal exclusion API isn't supported by the current toolkit,
1351 * it returns false for all windows.
1352 *
1353 * @param window Window to test for modal exclusion
1354 *
1355 * @return true if the window is modal excluded, false otherwise. If
1356 * the modal exclusion isn't supported by the current Toolkit, false
1357 * is returned
1358 *
1359 * @see sun.awt.SunToolkit#isModalExcludedSupported
1360 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1361 *
1362 * @since 1.5
1363 */
1364 public static boolean isModalExcluded(Window window)
1365 {
1366 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1367 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1368 }
1369 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1370 }
1371
1372 /**
1373 * Overridden in XToolkit and WToolkit
1374 */
1375 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1376 return (modalityType == Dialog.ModalityType.MODELESS) ||
1377 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1378 }
1379
1380 /**
1381 * Overridden in XToolkit and WToolkit
1382 */
1383 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1384 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1385 }
1386
1387 ///////////////////////////////////////////////////////////////////////////
1388 //
1389 // The following is used by the Java Plug-in to coordinate dialog modality
1390 // between containing applications (browsers, ActiveX containers etc) and
1391 // the AWT.
1392 //
1393 ///////////////////////////////////////////////////////////////////////////
1394
1395 private ModalityListenerList modalityListeners = new ModalityListenerList();
1396
1397 public void addModalityListener(ModalityListener listener) {
1398 modalityListeners.add(listener);
1399 }
1400
1401 public void removeModalityListener(ModalityListener listener) {
1402 modalityListeners.remove(listener);
1403 }
1404
1405 public void notifyModalityPushed(Dialog dialog) {
1406 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1407 }
1408
1409 public void notifyModalityPopped(Dialog dialog) {
1410 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1411 }
1412
1413 final void notifyModalityChange(int id, Dialog source) {
1414 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1415 ev.dispatch();
1416 }
1417
1418 static class ModalityListenerList implements ModalityListener {
1419
1420 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1421
1422 void add(ModalityListener listener) {
1423 listeners.addElement(listener);
1424 }
1425
1426 void remove(ModalityListener listener) {
1427 listeners.removeElement(listener);
1428 }
1429
1430 public void modalityPushed(ModalityEvent ev) {
1431 Iterator<ModalityListener> it = listeners.iterator();
1432 while (it.hasNext()) {
1433 it.next().modalityPushed(ev);
1434 }
1435 }
1436
1437 public void modalityPopped(ModalityEvent ev) {
1438 Iterator<ModalityListener> it = listeners.iterator();
1439 while (it.hasNext()) {
1440 it.next().modalityPopped(ev);
1441 }
1442 }
1443 } // end of class ModalityListenerList
1444
1445 ///////////////////////////////////////////////////////////////////////////
1446 // End Plug-in code
1447 ///////////////////////////////////////////////////////////////////////////
1448
1449 public static boolean isLightweightOrUnknown(Component comp) {
1450 if (comp.isLightweight()
1451 || !(getDefaultToolkit() instanceof SunToolkit))
1452 {
1453 return true;
1454 }
1455 return !(comp instanceof Button
1456 || comp instanceof Canvas
1457 || comp instanceof Checkbox
1458 || comp instanceof Choice
1459 || comp instanceof Label
1460 || comp instanceof java.awt.List
1461 || comp instanceof Panel
1462 || comp instanceof Scrollbar
1463 || comp instanceof ScrollPane
1464 || comp instanceof TextArea
1465 || comp instanceof TextField
1466 || comp instanceof Window);
1467 }
1468
1469 @SuppressWarnings("serial")
1470 public static class OperationTimedOut extends RuntimeException {
1471 public OperationTimedOut(String msg) {
1472 super(msg);
1473 }
1474 public OperationTimedOut() {
1475 }
1476 }
1477
1478 @SuppressWarnings("serial")
1479 public static class InfiniteLoop extends RuntimeException {
1480 }
1481
1482 @SuppressWarnings("serial")
1483 public static class IllegalThreadException extends RuntimeException {
1484 public IllegalThreadException(String msg) {
1485 super(msg);
1486 }
1487 public IllegalThreadException() {
1488 }
1489 }
1490
1491 public static final int DEFAULT_WAIT_TIME = 10000;
1492 private static final int MAX_ITERS = 20;
1493 private static final int MIN_ITERS = 0;
1494 private static final int MINIMAL_EDELAY = 0;
1495
1496 /**
1497 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1498 */
1499 public void realSync() throws OperationTimedOut, InfiniteLoop {
1500 realSync(DEFAULT_WAIT_TIME);
1501 }
1502
1503 /**
1504 * Forces toolkit to synchronize with the native windowing
1505 * sub-system, flushing all pending work and waiting for all the
1506 * events to be processed. This method guarantees that after
1507 * return no additional Java events will be generated, unless
1508 * cause by user. Obviously, the method cannot be used on the
1509 * event dispatch thread (EDT). In case it nevertheless gets
1510 * invoked on this thread, the method throws the
1511 * IllegalThreadException runtime exception.
1512 *
1513 * <p> This method allows to write tests without explicit timeouts
1514 * or wait for some event. Example:
1515 * <code>
1516 * Frame f = ...;
1517 * f.setVisible(true);
1518 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1519 * </code>
1520 *
1521 * <p> After realSync, <code>f</code> will be completely visible
1522 * on the screen, its getLocationOnScreen will be returning the
1523 * right result and it will be the focus owner.
1524 *
1525 * <p> Another example:
1526 * <code>
1527 * b.requestFocus();
1528 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1529 * </code>
1530 *
1531 * <p> After realSync, <code>b</code> will be focus owner.
1532 *
1533 * <p> Notice that realSync isn't guaranteed to work if recurring
1534 * actions occur, such as if during processing of some event
1535 * another request which may generate some events occurs. By
1536 * default, sync tries to perform as much as {@value MAX_ITERS}
1537 * cycles of event processing, allowing for roughly {@value
1538 * MAX_ITERS} additional requests.
1539 *
1540 * <p> For example, requestFocus() generates native request, which
1541 * generates one or two Java focus events, which then generate a
1542 * serie of paint events, a serie of Java focus events, which then
1543 * generate a serie of paint events which then are processed -
1544 * three cycles, minimum.
1545 *
1546 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1547 */
1548 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1549 {
1550 if (EventQueue.isDispatchThread()) {
1551 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1552 }
1553 int bigLoop = 0;
1554 do {
1555 // Let's do sync first
1556 sync();
1557
1558 // During the wait process, when we were processing incoming
1559 // events, we could have made some new request, which can
1560 // generate new events. Example: MapNotify/XSetInputFocus.
1561 // Therefore, we dispatch them as long as there is something
1562 // to dispatch.
1563 int iters = 0;
1564 while (iters < MIN_ITERS) {
1565 syncNativeQueue(timeout);
1566 iters++;
1567 }
1568 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1569 iters++;
1570 }
1571 if (iters >= MAX_ITERS) {
1572 throw new InfiniteLoop();
1573 }
1574
1575 // native requests were dispatched by X/Window Manager or Windows
1576 // Moreover, we processed them all on Toolkit thread
1577 // Now wait while EDT processes them.
1578 //
1579 // During processing of some events (focus, for example),
1580 // some other events could have been generated. So, after
1581 // waitForIdle, we may end up with full EventQueue
1582 iters = 0;
1583 while (iters < MIN_ITERS) {
1584 waitForIdle(timeout);
1585 iters++;
1586 }
1587 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1588 iters++;
1589 }
1590 if (iters >= MAX_ITERS) {
1591 throw new InfiniteLoop();
1592 }
1593
1594 bigLoop++;
1595 // Again, for Java events, it was simple to check for new Java
1596 // events by checking event queue, but what if Java events
1597 // resulted in native requests? Therefor, check native events again.
1598 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1599 }
1600
1601 /**
1602 * Platform toolkits need to implement this method to perform the
1603 * sync of the native queue. The method should wait until native
1604 * requests are processed, all native events are processed and
1605 * corresponding Java events are generated. Should return
1606 * <code>true</code> if some events were processed,
1607 * <code>false</code> otherwise.
1608 */
1609 protected abstract boolean syncNativeQueue(final long timeout);
1610
1611 private boolean eventDispatched = false;
1612 private boolean queueEmpty = false;
1613 private final Object waitLock = "Wait Lock";
1614
1615 private boolean isEQEmpty() {
1616 EventQueue queue = getSystemEventQueueImpl();
1617 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1618 }
1619
1620 /**
1621 * Waits for the Java event queue to empty. Ensures that all
1622 * events are processed (including paint events), and that if
1623 * recursive events were generated, they are also processed.
1624 * Should return <code>true</code> if more processing is
1625 * necessary, <code>false</code> otherwise.
1626 */
1627 @SuppressWarnings("serial")
1628 protected final boolean waitForIdle(final long timeout) {
1629 flushPendingEvents();
1630 boolean queueWasEmpty = isEQEmpty();
1631 queueEmpty = false;
1632 eventDispatched = false;
1633 synchronized(waitLock) {
1634 postEvent(AppContext.getAppContext(),
1635 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1636 public void dispatch() {
1637 // Here we block EDT. It could have some
1638 // events, it should have dispatched them by
1639 // now. So native requests could have been
1640 // generated. First, dispatch them. Then,
1641 // flush Java events again.
1642 int iters = 0;
1643 while (iters < MIN_ITERS) {
1644 syncNativeQueue(timeout);
1645 iters++;
1646 }
1647 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1648 iters++;
1649 }
1650 flushPendingEvents();
1651
1652 synchronized(waitLock) {
1653 queueEmpty = isEQEmpty();
1654 eventDispatched = true;
1655 waitLock.notifyAll();
1656 }
1657 }
1658 });
1659 try {
1660 while (!eventDispatched) {
1661 waitLock.wait();
1662 }
1663 } catch (InterruptedException ie) {
1664 return false;
1665 }
1666 }
1667
1668 try {
1669 Thread.sleep(MINIMAL_EDELAY);
1670 } catch (InterruptedException ie) {
1671 throw new RuntimeException("Interrupted");
1672 }
1673
1674 flushPendingEvents();
1675
1676 // Lock to force write-cache flush for queueEmpty.
1677 synchronized (waitLock) {
1678 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1679 }
1680 }
1681
1682 /**
1683 * Grabs the mouse input for the given window. The window must be
1684 * visible. The window or its children do not receive any
1685 * additional mouse events besides those targeted to them. All
1686 * other events will be dispatched as before - to the respective
1687 * targets. This Window will receive UngrabEvent when automatic
1688 * ungrab is about to happen. The event can be listened to by
1689 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1690 * UngrabEvent class for the list of conditions when ungrab is
1691 * about to happen.
1692 * @see UngrabEvent
1693 */
1694 public abstract void grab(Window w);
1695
1696 /**
1697 * Forces ungrab. No event will be sent.
1698 */
1699 public abstract void ungrab(Window w);
1700
1701
1702 /**
1703 * Locates the splash screen library in a platform dependent way and closes
1704 * the splash screen. Should be invoked on first top-level frame display.
1705 * @see java.awt.SplashScreen
1706 * @since 1.6
1707 */
1708 public static native void closeSplashScreen();
1709
1710 /* The following methods and variables are to support retrieving
1711 * desktop text anti-aliasing settings
1712 */
1713
1714 /* Need an instance method because setDesktopProperty(..) is protected. */
1715 private void fireDesktopFontPropertyChanges() {
1716 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1717 SunToolkit.getDesktopFontHints());
1718 }
1719
1720 private static boolean checkedSystemAAFontSettings;
1721 private static boolean useSystemAAFontSettings;
1722 private static boolean lastExtraCondition = true;
1723 private static RenderingHints desktopFontHints;
1724
1725 /* Since Swing is the reason for this "extra condition" logic its
1726 * worth documenting it in some detail.
1727 * First, a goal is for Swing and applications to both retrieve and
1728 * use the same desktop property value so that there is complete
1729 * consistency between the settings used by JDK's Swing implementation
1730 * and 3rd party custom Swing components, custom L&Fs and any general
1731 * text rendering that wants to be consistent with these.
1732 * But by default on Solaris & Linux Swing will not use AA text over
1733 * remote X11 display (unless Xrender can be used which is TBD and may not
1734 * always be available anyway) as that is a noticeable performance hit.
1735 * So there needs to be a way to express that extra condition so that
1736 * it is seen by all clients of the desktop property API.
1737 * If this were the only condition it could be handled here as it would
1738 * be the same for any L&F and could reasonably be considered to be
1739 * a static behaviour of those systems.
1740 * But GTK currently has an additional test based on locale which is
1741 * not applied by Metal. So mixing GTK in a few locales with Metal
1742 * would mean the last one wins.
1743 * This could be stored per-app context which would work
1744 * for different applets, but wouldn't help for a single application
1745 * using GTK and some other L&F concurrently.
1746 * But it is expected this will be addressed within GTK and the font
1747 * system so is a temporary and somewhat unlikely harmless corner case.
1748 */
1749 public static void setAAFontSettingsCondition(boolean extraCondition) {
1750 if (extraCondition != lastExtraCondition) {
1751 lastExtraCondition = extraCondition;
1752 if (checkedSystemAAFontSettings) {
1753 /* Someone already asked for this info, under a different
1754 * condition.
1755 * We'll force re-evaluation instead of replicating the
1756 * logic, then notify any listeners of any change.
1757 */
1758 checkedSystemAAFontSettings = false;
1759 Toolkit tk = Toolkit.getDefaultToolkit();
1760 if (tk instanceof SunToolkit) {
1761 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1762 }
1763 }
1764 }
1765 }
1766
1767 /* "false", "off", ""default" aren't explicitly tested, they
1768 * just fall through to produce a null return which all are equated to
1769 * "false".
1770 */
1771 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1772 Object aaHint = null;
1773 hintname = hintname.toLowerCase(Locale.ENGLISH);
1774 if (hintname.equals("on")) {
1775 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1776 } else if (hintname.equals("gasp")) {
1777 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1778 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1779 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1780 } else if (hintname.equals("lcd_hbgr")) {
1781 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1782 } else if (hintname.equals("lcd_vrgb")) {
1783 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1784 } else if (hintname.equals("lcd_vbgr")) {
1785 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1786 }
1787 if (aaHint != null) {
1788 RenderingHints map = new RenderingHints(null);
1789 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1790 return map;
1791 } else {
1792 return null;
1793 }
1794 }
1795
1796 /* This method determines whether to use the system font settings,
1797 * or ignore them if a L&F has specified they should be ignored, or
1798 * to override both of these with a system property specified value.
1799 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1800 * system property isn't applied as desktop properties are considered
1801 * to be inapplicable in that case. In that headless case although
1802 * this method will return "true" the toolkit will return a null map.
1803 */
1804 private static boolean useSystemAAFontSettings() {
1805 if (!checkedSystemAAFontSettings) {
1806 useSystemAAFontSettings = true; /* initially set this true */
1807 String systemAAFonts = null;
1808 Toolkit tk = Toolkit.getDefaultToolkit();
1809 if (tk instanceof SunToolkit) {
1810 systemAAFonts =
1811 AccessController.doPrivileged(
1812 new GetPropertyAction("awt.useSystemAAFontSettings"));
1813 }
1814 if (systemAAFonts != null) {
1815 useSystemAAFontSettings =
1816 Boolean.valueOf(systemAAFonts).booleanValue();
1817 /* If it is anything other than "true", then it may be
1818 * a hint name , or it may be "off, "default", etc.
1819 */
1820 if (!useSystemAAFontSettings) {
1821 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1822 }
1823 }
1824 /* If its still true, apply the extra condition */
1825 if (useSystemAAFontSettings) {
1826 useSystemAAFontSettings = lastExtraCondition;
1827 }
1828 checkedSystemAAFontSettings = true;
1829 }
1830 return useSystemAAFontSettings;
1831 }
1832
1833 /* A variable defined for the convenience of JDK code */
1834 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1835
1836 /* Overridden by subclasses to return platform/desktop specific values */
1837 protected RenderingHints getDesktopAAHints() {
1838 return null;
1839 }
1840
1841 /* Subclass desktop property loading methods call this which
1842 * in turn calls the appropriate subclass implementation of
1843 * getDesktopAAHints() when system settings are being used.
1844 * Its public rather than protected because subclasses may delegate
1845 * to a helper class.
1846 */
1847 public static RenderingHints getDesktopFontHints() {
1848 if (useSystemAAFontSettings()) {
1849 Toolkit tk = Toolkit.getDefaultToolkit();
1850 if (tk instanceof SunToolkit) {
1851 Object map = ((SunToolkit)tk).getDesktopAAHints();
1852 return (RenderingHints)map;
1853 } else { /* Headless Toolkit */
1854 return null;
1855 }
1856 } else if (desktopFontHints != null) {
1857 /* cloning not necessary as the return value is cloned later, but
1858 * its harmless.
1859 */
1860 return (RenderingHints)(desktopFontHints.clone());
1861 } else {
1862 return null;
1863 }
1864 }
1865
1866
1867 public abstract boolean isDesktopSupported();
1868
1869 /*
1870 * consumeNextKeyTyped() method is not currently used,
1871 * however Swing could use it in the future.
1872 */
1873 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1874 try {
1875 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1876 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1877 getCurrentKeyboardFocusManager(),
1878 keyEvent);
1879 } catch (ClassCastException cce) {
1880 cce.printStackTrace();
1881 }
1882 }
1883
1884 protected static void dumpPeers(final PlatformLogger aLog) {
1885 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1886 }
1887
1888 /**
1889 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1890 * @return Window ancestor of the component or component by itself if it is Window;
1891 * null, if component is not a part of window hierarchy
1892 */
1893 public static Window getContainingWindow(Component comp) {
1894 while (comp != null && !(comp instanceof Window)) {
1895 comp = comp.getParent();
1896 }
1897 return (Window)comp;
1898 }
1899
1900 private static Boolean sunAwtDisableMixing = null;
1901
1902 /**
1903 * Returns the value of "sun.awt.disableMixing" property. Default
1904 * value is {@code false}.
1905 */
1906 public synchronized static boolean getSunAwtDisableMixing() {
1907 if (sunAwtDisableMixing == null) {
1908 sunAwtDisableMixing = AccessController.doPrivileged(
1909 new GetBooleanAction("sun.awt.disableMixing"));
1910 }
1911 return sunAwtDisableMixing.booleanValue();
1912 }
1913
1914 /**
1915 * Returns true if the native GTK libraries are available. The
1916 * default implementation returns false, but UNIXToolkit overrides this
1917 * method to provide a more specific answer.
1918 */
1919 public boolean isNativeGTKAvailable() {
1920 return false;
1921 }
1922
1923 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1924
1925 public synchronized void setWindowDeactivationTime(Window w, long time) {
1926 AppContext ctx = getAppContext(w);
1927 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1928 if (map == null) {
1929 map = new WeakHashMap<Window, Long>();
1930 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1931 }
1932 map.put(w, time);
1933 }
1934
1935 public synchronized long getWindowDeactivationTime(Window w) {
1936 AppContext ctx = getAppContext(w);
1937 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1938 if (map == null) {
1939 return -1;
1940 }
1941 Long time = map.get(w);
1942 return time == null ? -1 : time;
1943 }
1944
1945 // Cosntant alpha
1946 public boolean isWindowOpacitySupported() {
1947 return false;
1948 }
1949
1950 // Shaping
1951 public boolean isWindowShapingSupported() {
1952 return false;
1953 }
1954
1955 // Per-pixel alpha
1956 public boolean isWindowTranslucencySupported() {
1957 return false;
1958 }
1959
1960 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1961 return false;
1962 }
1963
1964 /**
1965 * Returns true if swing backbuffer should be translucent.
1966 */
1967 public boolean isSwingBackbufferTranslucencySupported() {
1968 return false;
1969 }
1970
1971 /**
1972 * Returns whether or not a containing top level window for the passed
1973 * component is
1974 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1975 *
1976 * @param c a Component which toplevel's to check
1977 * @return {@code true} if the passed component is not null and has a
1978 * containing toplevel window which is opaque (so per-pixel translucency
1979 * is not enabled), {@code false} otherwise
1980 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1981 */
1982 public static boolean isContainingTopLevelOpaque(Component c) {
1983 Window w = getContainingWindow(c);
1984 return w != null && w.isOpaque();
1985 }
1986
1987 /**
1988 * Returns whether or not a containing top level window for the passed
1989 * component is
1990 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
1991 *
1992 * @param c a Component which toplevel's to check
1993 * @return {@code true} if the passed component is not null and has a
1994 * containing toplevel window which has opacity less than
1995 * 1.0f (which means that it is translucent), {@code false} otherwise
1996 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
1997 */
1998 public static boolean isContainingTopLevelTranslucent(Component c) {
1999 Window w = getContainingWindow(c);
2000 return w != null && w.getOpacity() < 1.0f;
2001 }
2002
2003 /**
2004 * Returns whether the native system requires using the peer.updateWindow()
2005 * method to update the contents of a non-opaque window, or if usual
2006 * painting procedures are sufficient. The default return value covers
2007 * the X11 systems. On MS Windows this method is overriden in WToolkit
2008 * to return true.
2009 */
2010 public boolean needUpdateWindow() {
2011 return false;
2012 }
2013
2014 /**
2015 * Descendants of the SunToolkit should override and put their own logic here.
2016 */
2017 public int getNumberOfButtons(){
2018 return 3;
2019 }
2020
2021 /**
2022 * Checks that the given object implements/extends the given
2023 * interface/class.
2024 *
2025 * Note that using the instanceof operator causes a class to be loaded.
2026 * Using this method doesn't load a class and it can be used instead of
2027 * the instanceof operator for performance reasons.
2028 *
2029 * @param obj Object to be checked
2030 * @param type The name of the interface/class. Must be
2031 * fully-qualified interface/class name.
2032 * @return true, if this object implements/extends the given
2033 * interface/class, false, otherwise, or if obj or type is null
2034 */
2035 public static boolean isInstanceOf(Object obj, String type) {
2036 if (obj == null) return false;
2037 if (type == null) return false;
2038
2039 return isInstanceOf(obj.getClass(), type);
2040 }
2041
2042 private static boolean isInstanceOf(Class<?> cls, String type) {
2043 if (cls == null) return false;
2044
2045 if (cls.getName().equals(type)) {
2046 return true;
2047 }
2048
2049 for (Class<?> c : cls.getInterfaces()) {
2050 if (c.getName().equals(type)) {
2051 return true;
2052 }
2053 }
2054 return isInstanceOf(cls.getSuperclass(), type);
2055 }
2056
2057 protected static LightweightFrame getLightweightFrame(Component c) {
2058 for (; c != null; c = c.getParent()) {
2059 if (c instanceof LightweightFrame) {
2060 return (LightweightFrame)c;
2061 }
2062 if (c instanceof Window) {
2063 // Don't traverse owner windows
2064 return null;
2065 }
2066 }
2067 return null;
2068 }
2069
2070 ///////////////////////////////////////////////////////////////////////////
2071 //
2072 // The following methods help set and identify whether a particular
2073 // AWTEvent object was produced by the system or by user code. As of this
2074 // writing the only consumer is the Java Plug-In, although this information
2075 // could be useful to more clients and probably should be formalized in
2076 // the public API.
2077 //
2078 ///////////////////////////////////////////////////////////////////////////
2079
2080 public static void setSystemGenerated(AWTEvent e) {
2081 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2082 }
2083
2084 public static boolean isSystemGenerated(AWTEvent e) {
2085 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2086 }
2087
2088 } // class SunToolkit
2089
2090
2091 /*
2092 * PostEventQueue is a Thread that runs in the same AppContext as the
2093 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2094 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2095 * events to this queue, which then calls EventQueue.postEvent().
2096 *
2097 * We do this because EventQueue.postEvent() may be overridden by client
2098 * code, and we mustn't ever call client code from the toolkit thread.
2099 */
2100 class PostEventQueue {
2101 private EventQueueItem queueHead = null;
2102 private EventQueueItem queueTail = null;
2103 private final EventQueue eventQueue;
2104
2105 private Thread flushThread = null;
2106
2107 PostEventQueue(EventQueue eq) {
2108 eventQueue = eq;
2109 }
2110
2111 /*
2112 * Continually post pending AWTEvents to the Java EventQueue. The method
2113 * is synchronized to ensure the flush is completed before a new event
2114 * can be posted to this queue.
2115 *
2116 * 7177040: The method couldn't be wholly synchronized because of calls
2117 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2118 * potentially lead to deadlock
2119 */
2120 public void flush() {
2121
2122 Thread newThread = Thread.currentThread();
2123
2124 try {
2125 EventQueueItem tempQueue;
2126 synchronized (this) {
2127 // Avoid method recursion
2128 if (newThread == flushThread) {
2129 return;
2130 }
2131 // Wait for other threads' flushing
2132 while (flushThread != null) {
2133 wait();
2134 }
2135 // Skip everything if queue is empty
2136 if (queueHead == null) {
2137 return;
2138 }
2139 // Remember flushing thread
2140 flushThread = newThread;
2141
2142 tempQueue = queueHead;
2143 queueHead = queueTail = null;
2144 }
2145 try {
2146 while (tempQueue != null) {
2147 eventQueue.postEvent(tempQueue.event);
2148 tempQueue = tempQueue.next;
2149 }
2150 }
2151 finally {
2152 // Only the flushing thread can get here
2153 synchronized (this) {
2154 // Forget flushing thread, inform other pending threads
2155 flushThread = null;
2156 notifyAll();
2157 }
2158 }
2159 }
2160 catch (InterruptedException e) {
2161 // Couldn't allow exception go up, so at least recover the flag
2162 newThread.interrupt();
2163 }
2164 }
2165
2166 /*
2167 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2168 */
2169 void postEvent(AWTEvent event) {
2170 EventQueueItem item = new EventQueueItem(event);
2171
2172 synchronized (this) {
2173 if (queueHead == null) {
2174 queueHead = queueTail = item;
2175 } else {
2176 queueTail.next = item;
2177 queueTail = item;
2178 }
2179 }
2180 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2181 }
2182 } // class PostEventQueue