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 fileImgCache = new SoftCache();
719
720 static final SoftCache urlImgCache = new SoftCache();
721
722 static Image getImageFromHash(Toolkit tk, URL url) {
723 checkPermissions(url);
724 synchronized (urlImgCache) {
725 String key = url.toString();
726 Image img = (Image)urlImgCache.get(key);
727 if (img == null) {
728 try {
729 img = tk.createImage(new URLImageSource(url));
730 urlImgCache.put(key, img);
731 } catch (Exception e) {
732 }
733 }
734 return img;
735 }
736 }
737
738 static Image getImageFromHash(Toolkit tk,
739 String filename) {
740 checkPermissions(filename);
741 synchronized (fileImgCache) {
742 Image img = (Image)fileImgCache.get(filename);
743 if (img == null) {
744 try {
745 img = tk.createImage(new FileImageSource(filename));
746 fileImgCache.put(filename, img);
747 } catch (Exception e) {
748 }
749 }
750 return img;
751 }
752 }
753
754 public Image getImage(String filename) {
755 return getImageFromHash(this, filename);
756 }
757
758 public Image getImage(URL url) {
759 return getImageFromHash(this, url);
760 }
761
762 protected Image getImageWithResolutionVariant(String fileName,
763 String resolutionVariantName) {
764 synchronized (fileImgCache) {
765 Image image = getImageFromHash(this, fileName);
766 if (image instanceof MultiResolutionImage) {
767 return image;
768 }
769 Image resolutionVariant = getImageFromHash(this, resolutionVariantName);
770 image = createImageWithResolutionVariant(image, resolutionVariant);
771 fileImgCache.put(fileName, image);
772 return image;
773 }
774 }
775
776 protected Image getImageWithResolutionVariant(URL url,
777 URL resolutionVariantURL) {
778 synchronized (urlImgCache) {
779 Image image = getImageFromHash(this, url);
780 if (image instanceof MultiResolutionImage) {
781 return image;
782 }
783 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL);
784 image = createImageWithResolutionVariant(image, resolutionVariant);
785 String key = url.toString();
786 urlImgCache.put(key, image);
787 return image;
788 }
789 }
790
791
792 public Image createImage(String filename) {
793 checkPermissions(filename);
794 return createImage(new FileImageSource(filename));
795 }
796
797 public Image createImage(URL url) {
798 checkPermissions(url);
799 return createImage(new URLImageSource(url));
800 }
801
802 public Image createImage(byte[] data, int offset, int length) {
803 return createImage(new ByteArrayImageSource(data, offset, length));
804 }
805
806 public Image createImage(ImageProducer producer) {
807 return new ToolkitImage(producer);
808 }
809
810 public static Image createImageWithResolutionVariant(Image image,
811 Image resolutionVariant) {
812 return new MultiResolutionToolkitImage(image, resolutionVariant);
813 }
814
815 public int checkImage(Image img, int w, int h, ImageObserver o) {
816 if (!(img instanceof ToolkitImage)) {
817 return ImageObserver.ALLBITS;
818 }
819
820 ToolkitImage tkimg = (ToolkitImage)img;
821 int repbits;
822 if (w == 0 || h == 0) {
823 repbits = ImageObserver.ALLBITS;
824 } else {
825 repbits = tkimg.getImageRep().check(o);
826 }
827 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o);
828 }
829
830 public boolean prepareImage(Image img, int w, int h, ImageObserver o) {
831 if (w == 0 || h == 0) {
832 return true;
833 }
834
835 // Must be a ToolkitImage
836 if (!(img instanceof ToolkitImage)) {
837 return true;
838 }
839
840 ToolkitImage tkimg = (ToolkitImage)img;
841 if (tkimg.hasError()) {
842 if (o != null) {
843 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT,
844 -1, -1, -1, -1);
845 }
846 return false;
847 }
848 ImageRepresentation ir = tkimg.getImageRep();
849 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o);
850 }
851
852 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) {
853 ToolkitImage rvImage = getResolutionVariant(img);
854 int rvw = getRVSize(w);
855 int rvh = getRVSize(h);
856 // Ignore the resolution variant in case of error
857 return (rvImage == null || rvImage.hasError()) ? 0xFFFF :
858 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage.
859 getResolutionVariantObserver(
860 img, o, w, h, rvw, rvh, true));
861 }
862
863 private boolean prepareResolutionVariant(Image img, int w, int h,
864 ImageObserver o) {
865
866 ToolkitImage rvImage = getResolutionVariant(img);
867 int rvw = getRVSize(w);
868 int rvh = getRVSize(h);
869 // Ignore the resolution variant in case of error
870 return rvImage == null || rvImage.hasError() || prepareImage(
871 rvImage, rvw, rvh,
872 MultiResolutionToolkitImage.getResolutionVariantObserver(
873 img, o, w, h, rvw, rvh, true));
874 }
875
876 private static int getRVSize(int size){
877 return size == -1 ? -1 : 2 * size;
878 }
879
880 private static ToolkitImage getResolutionVariant(Image image) {
881 if (image instanceof MultiResolutionToolkitImage) {
882 Image resolutionVariant = ((MultiResolutionToolkitImage) image).
883 getResolutionVariant();
884 if (resolutionVariant instanceof ToolkitImage) {
885 return (ToolkitImage) resolutionVariant;
886 }
887 }
888 return null;
889 }
890
891 protected static boolean imageCached(String fileName) {
892 return fileImgCache.containsKey(fileName);
893 }
894
895 protected static boolean imageCached(URL url) {
896 String key = url.toString();
897 return urlImgCache.containsKey(key);
898 }
899
900 protected static boolean imageExists(String filename) {
901 if (filename != null) {
902 checkPermissions(filename);
903 return new File(filename).exists();
904 }
905 return false;
906 }
907
908 @SuppressWarnings("try")
909 protected static boolean imageExists(URL url) {
910 if (url != null) {
911 checkPermissions(url);
912 try (InputStream is = url.openStream()) {
913 return true;
914 }catch(IOException e){
915 return false;
916 }
917 }
918 return false;
919 }
920
921 private static void checkPermissions(String filename) {
922 SecurityManager security = System.getSecurityManager();
923 if (security != null) {
924 security.checkRead(filename);
925 }
926 }
927
928 private static void checkPermissions(URL url) {
929 SecurityManager sm = System.getSecurityManager();
930 if (sm != null) {
931 try {
932 java.security.Permission perm =
933 URLUtil.getConnectPermission(url);
934 if (perm != null) {
935 try {
936 sm.checkPermission(perm);
937 } catch (SecurityException se) {
938 // fallback to checkRead/checkConnect for pre 1.2
939 // security managers
940 if ((perm instanceof java.io.FilePermission) &&
941 perm.getActions().indexOf("read") != -1) {
942 sm.checkRead(perm.getName());
943 } else if ((perm instanceof
944 java.net.SocketPermission) &&
945 perm.getActions().indexOf("connect") != -1) {
946 sm.checkConnect(url.getHost(), url.getPort());
947 } else {
948 throw se;
949 }
950 }
951 }
952 } catch (java.io.IOException ioe) {
953 sm.checkConnect(url.getHost(), url.getPort());
954 }
955 }
956 }
957
958 /**
959 * Scans {@code imageList} for best-looking image of specified dimensions.
960 * Image can be scaled and/or padded with transparency.
961 */
962 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) {
963 if (width == 0 || height == 0) {
964 return null;
965 }
966 Image bestImage = null;
967 int bestWidth = 0;
968 int bestHeight = 0;
969 double bestSimilarity = 3; //Impossibly high value
970 double bestScaleFactor = 0;
971 for (Iterator<Image> i = imageList.iterator();i.hasNext();) {
972 //Iterate imageList looking for best matching image.
973 //'Similarity' measure is defined as good scale factor and small insets.
974 //best possible similarity is 0 (no scale, no insets).
975 //It's found while the experiments that good-looking result is achieved
976 //with scale factors x1, x3/4, x2/3, xN, x1/N.
977 Image im = i.next();
978 if (im == null) {
979 continue;
980 }
981 if (im instanceof ToolkitImage) {
982 ImageRepresentation ir = ((ToolkitImage)im).getImageRep();
983 ir.reconstruct(ImageObserver.ALLBITS);
984 }
985 int iw;
986 int ih;
987 try {
988 iw = im.getWidth(null);
989 ih = im.getHeight(null);
990 } catch (Exception e){
991 continue;
992 }
993 if (iw > 0 && ih > 0) {
994 //Calc scale factor
995 double scaleFactor = Math.min((double)width / (double)iw,
996 (double)height / (double)ih);
997 //Calculate scaled image dimensions
998 //adjusting scale factor to nearest "good" value
999 int adjw = 0;
1000 int adjh = 0;
1001 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad
1002 if (scaleFactor >= 2) {
1003 //Need to enlarge image more than twice
1004 //Round down scale factor to multiply by integer value
1005 scaleFactor = Math.floor(scaleFactor);
1006 adjw = iw * (int)scaleFactor;
1007 adjh = ih * (int)scaleFactor;
1008 scaleMeasure = 1.0 - 0.5 / scaleFactor;
1009 } else if (scaleFactor >= 1) {
1010 //Don't scale
1011 scaleFactor = 1.0;
1012 adjw = iw;
1013 adjh = ih;
1014 scaleMeasure = 0;
1015 } else if (scaleFactor >= 0.75) {
1016 //Multiply by 3/4
1017 scaleFactor = 0.75;
1018 adjw = iw * 3 / 4;
1019 adjh = ih * 3 / 4;
1020 scaleMeasure = 0.3;
1021 } else if (scaleFactor >= 0.6666) {
1022 //Multiply by 2/3
1023 scaleFactor = 0.6666;
1024 adjw = iw * 2 / 3;
1025 adjh = ih * 2 / 3;
1026 scaleMeasure = 0.33;
1027 } else {
1028 //Multiply size by 1/scaleDivider
1029 //where scaleDivider is minimum possible integer
1030 //larger than 1/scaleFactor
1031 double scaleDivider = Math.ceil(1.0 / scaleFactor);
1032 scaleFactor = 1.0 / scaleDivider;
1033 adjw = (int)Math.round((double)iw / scaleDivider);
1034 adjh = (int)Math.round((double)ih / scaleDivider);
1035 scaleMeasure = 1.0 - 1.0 / scaleDivider;
1036 }
1037 double similarity = ((double)width - (double)adjw) / (double)width +
1038 ((double)height - (double)adjh) / (double)height + //Large padding is bad
1039 scaleMeasure; //Large rescale is bad
1040 if (similarity < bestSimilarity) {
1041 bestSimilarity = similarity;
1042 bestScaleFactor = scaleFactor;
1043 bestImage = im;
1044 bestWidth = adjw;
1045 bestHeight = adjh;
1046 }
1047 if (similarity == 0) break;
1048 }
1049 }
1050 if (bestImage == null) {
1051 //No images were found, possibly all are broken
1052 return null;
1053 }
1054 BufferedImage bimage =
1055 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
1056 Graphics2D g = bimage.createGraphics();
1057 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
1058 RenderingHints.VALUE_INTERPOLATION_BILINEAR);
1059 try {
1060 int x = (width - bestWidth) / 2;
1061 int y = (height - bestHeight) / 2;
1062 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null);
1063 } finally {
1064 g.dispose();
1065 }
1066 return bimage;
1067 }
1068
1069 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) {
1070 BufferedImage bimage = getScaledIconImage(imageList, width, height);
1071 if (bimage == null) {
1072 return null;
1073 }
1074 Raster raster = bimage.getRaster();
1075 DataBuffer buffer = raster.getDataBuffer();
1076 return (DataBufferInt)buffer;
1077 }
1078
1079 protected EventQueue getSystemEventQueueImpl() {
1080 return getSystemEventQueueImplPP();
1081 }
1082
1083 // Package private implementation
1084 static EventQueue getSystemEventQueueImplPP() {
1085 return getSystemEventQueueImplPP(AppContext.getAppContext());
1086 }
1087
1088 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) {
1089 EventQueue theEventQueue =
1090 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY);
1091 return theEventQueue;
1092 }
1093
1094 /**
1095 * Give native peers the ability to query the native container
1096 * given a native component (eg the direct parent may be lightweight).
1097 */
1098 public static Container getNativeContainer(Component c) {
1099 return Toolkit.getNativeContainer(c);
1100 }
1101
1102 /**
1103 * Gives native peers the ability to query the closest HW component.
1104 * If the given component is heavyweight, then it returns this. Otherwise,
1105 * it goes one level up in the hierarchy and tests next component.
1106 */
1107 public static Component getHeavyweightComponent(Component c) {
1108 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) {
1109 c = AWTAccessor.getComponentAccessor().getParent(c);
1110 }
1111 return c;
1112 }
1113
1114 /**
1115 * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
1116 */
1117 public int getFocusAcceleratorKeyMask() {
1118 return InputEvent.ALT_MASK;
1119 }
1120
1121 /**
1122 * Tests whether specified key modifiers mask can be used to enter a printable
1123 * character. This is a default implementation of this method, which reflects
1124 * the way things work on Windows: here, pressing ctrl + alt allows user to enter
1125 * characters from the extended character set (like euro sign or math symbols)
1126 */
1127 public boolean isPrintableCharacterModifiersMask(int mods) {
1128 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK));
1129 }
1130
1131 /**
1132 * Returns whether popup is allowed to be shown above the task bar.
1133 * This is a default implementation of this method, which checks
1134 * corresponding security permission.
1135 */
1136 public boolean canPopupOverlapTaskBar() {
1137 boolean result = true;
1138 try {
1139 SecurityManager sm = System.getSecurityManager();
1140 if (sm != null) {
1141 sm.checkPermission(
1142 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION);
1143 }
1144 } catch (SecurityException se) {
1145 // There is no permission to show popups over the task bar
1146 result = false;
1147 }
1148 return result;
1149 }
1150
1151 /**
1152 * Returns a new input method window, with behavior as specified in
1153 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}.
1154 * If the inputContext is not null, the window should return it from its
1155 * getInputContext() method. The window needs to implement
1156 * sun.awt.im.InputMethodWindow.
1157 * <p>
1158 * SunToolkit subclasses can override this method to return better input
1159 * method windows.
1160 */
1161 public Window createInputMethodWindow(String title, InputContext context) {
1162 return new sun.awt.im.SimpleInputMethodWindow(title, context);
1163 }
1164
1165 /**
1166 * Returns whether enableInputMethods should be set to true for peered
1167 * TextComponent instances on this platform. False by default.
1168 */
1169 public boolean enableInputMethodsForTextComponent() {
1170 return false;
1171 }
1172
1173 private static Locale startupLocale = null;
1174
1175 /**
1176 * Returns the locale in which the runtime was started.
1177 */
1178 public static Locale getStartupLocale() {
1179 if (startupLocale == null) {
1180 String language, region, country, variant;
1181 language = AccessController.doPrivileged(
1182 new GetPropertyAction("user.language", "en"));
1183 // for compatibility, check for old user.region property
1184 region = AccessController.doPrivileged(
1185 new GetPropertyAction("user.region"));
1186 if (region != null) {
1187 // region can be of form country, country_variant, or _variant
1188 int i = region.indexOf('_');
1189 if (i >= 0) {
1190 country = region.substring(0, i);
1191 variant = region.substring(i + 1);
1192 } else {
1193 country = region;
1194 variant = "";
1195 }
1196 } else {
1197 country = AccessController.doPrivileged(
1198 new GetPropertyAction("user.country", ""));
1199 variant = AccessController.doPrivileged(
1200 new GetPropertyAction("user.variant", ""));
1201 }
1202 startupLocale = new Locale(language, country, variant);
1203 }
1204 return startupLocale;
1205 }
1206
1207 /**
1208 * Returns the default keyboard locale of the underlying operating system
1209 */
1210 public Locale getDefaultKeyboardLocale() {
1211 return getStartupLocale();
1212 }
1213
1214 // Support for window closing event notifications
1215 private transient WindowClosingListener windowClosingListener = null;
1216 /**
1217 * @see sun.awt.WindowClosingSupport#getWindowClosingListener
1218 */
1219 public WindowClosingListener getWindowClosingListener() {
1220 return windowClosingListener;
1221 }
1222 /**
1223 * @see sun.awt.WindowClosingSupport#setWindowClosingListener
1224 */
1225 public void setWindowClosingListener(WindowClosingListener wcl) {
1226 windowClosingListener = wcl;
1227 }
1228
1229 /**
1230 * @see sun.awt.WindowClosingListener#windowClosingNotify
1231 */
1232 public RuntimeException windowClosingNotify(WindowEvent event) {
1233 if (windowClosingListener != null) {
1234 return windowClosingListener.windowClosingNotify(event);
1235 } else {
1236 return null;
1237 }
1238 }
1239 /**
1240 * @see sun.awt.WindowClosingListener#windowClosingDelivered
1241 */
1242 public RuntimeException windowClosingDelivered(WindowEvent event) {
1243 if (windowClosingListener != null) {
1244 return windowClosingListener.windowClosingDelivered(event);
1245 } else {
1246 return null;
1247 }
1248 }
1249
1250 private static DefaultMouseInfoPeer mPeer = null;
1251
1252 protected synchronized MouseInfoPeer getMouseInfoPeer() {
1253 if (mPeer == null) {
1254 mPeer = new DefaultMouseInfoPeer();
1255 }
1256 return mPeer;
1257 }
1258
1259
1260 /**
1261 * Returns whether default toolkit needs the support of the xembed
1262 * from embedding host(if any).
1263 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1264 */
1265 public static boolean needsXEmbed() {
1266 String noxembed = AccessController.
1267 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false"));
1268 if ("true".equals(noxembed)) {
1269 return false;
1270 }
1271
1272 Toolkit tk = Toolkit.getDefaultToolkit();
1273 if (tk instanceof SunToolkit) {
1274 // SunToolkit descendants should override this method to specify
1275 // concrete behavior
1276 return ((SunToolkit)tk).needsXEmbedImpl();
1277 } else {
1278 // Non-SunToolkit doubtly might support XEmbed
1279 return false;
1280 }
1281 }
1282
1283 /**
1284 * Returns whether this toolkit needs the support of the xembed
1285 * from embedding host(if any).
1286 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise
1287 */
1288 protected boolean needsXEmbedImpl() {
1289 return false;
1290 }
1291
1292 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null;
1293
1294 /**
1295 * Returns whether the XEmbed server feature is requested by
1296 * developer. If true, Toolkit should return an
1297 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer.
1298 */
1299 protected final boolean isXEmbedServerRequested() {
1300 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver"));
1301 }
1302
1303 /**
1304 * Returns whether the modal exclusion API is supported by the current toolkit.
1305 * When it isn't supported, calling <code>setModalExcluded</code> has no
1306 * effect, and <code>isModalExcluded</code> returns false for all windows.
1307 *
1308 * @return true if modal exclusion is supported by the toolkit, false otherwise
1309 *
1310 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1311 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1312 *
1313 * @since 1.5
1314 */
1315 public static boolean isModalExcludedSupported()
1316 {
1317 Toolkit tk = Toolkit.getDefaultToolkit();
1318 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE);
1319 }
1320 /*
1321 * Default implementation for isModalExcludedSupportedImpl(), returns false.
1322 *
1323 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl
1324 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl
1325 *
1326 * @since 1.5
1327 */
1328 protected boolean isModalExcludedSupportedImpl()
1329 {
1330 return false;
1331 }
1332
1333 /*
1334 * Sets this window to be excluded from being modally blocked. When the
1335 * toolkit supports modal exclusion and this method is called, input
1336 * events, focus transfer and z-order will continue to work for the
1337 * window, it's owned windows and child components, even in the
1338 * presence of a modal dialog.
1339 * For details on which <code>Window</code>s are normally blocked
1340 * by modal dialog, see {@link java.awt.Dialog}.
1341 * Invoking this method when the modal exclusion API is not supported by
1342 * the current toolkit has no effect.
1343 * @param window Window to be marked as not modally blocked
1344 * @see java.awt.Dialog
1345 * @see java.awt.Dialog#setModal(boolean)
1346 * @see sun.awt.SunToolkit#isModalExcludedSupported
1347 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window)
1348 */
1349 public static void setModalExcluded(Window window)
1350 {
1351 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1352 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1353 }
1354 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE);
1355 }
1356
1357 /*
1358 * Returns whether the specified window is blocked by modal dialogs.
1359 * If the modal exclusion API isn't supported by the current toolkit,
1360 * it returns false for all windows.
1361 *
1362 * @param window Window to test for modal exclusion
1363 *
1364 * @return true if the window is modal excluded, false otherwise. If
1365 * the modal exclusion isn't supported by the current Toolkit, false
1366 * is returned
1367 *
1368 * @see sun.awt.SunToolkit#isModalExcludedSupported
1369 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window)
1370 *
1371 * @since 1.5
1372 */
1373 public static boolean isModalExcluded(Window window)
1374 {
1375 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) {
1376 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE;
1377 }
1378 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0;
1379 }
1380
1381 /**
1382 * Overridden in XToolkit and WToolkit
1383 */
1384 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
1385 return (modalityType == Dialog.ModalityType.MODELESS) ||
1386 (modalityType == Dialog.ModalityType.APPLICATION_MODAL);
1387 }
1388
1389 /**
1390 * Overridden in XToolkit and WToolkit
1391 */
1392 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
1393 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE);
1394 }
1395
1396 ///////////////////////////////////////////////////////////////////////////
1397 //
1398 // The following is used by the Java Plug-in to coordinate dialog modality
1399 // between containing applications (browsers, ActiveX containers etc) and
1400 // the AWT.
1401 //
1402 ///////////////////////////////////////////////////////////////////////////
1403
1404 private ModalityListenerList modalityListeners = new ModalityListenerList();
1405
1406 public void addModalityListener(ModalityListener listener) {
1407 modalityListeners.add(listener);
1408 }
1409
1410 public void removeModalityListener(ModalityListener listener) {
1411 modalityListeners.remove(listener);
1412 }
1413
1414 public void notifyModalityPushed(Dialog dialog) {
1415 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog);
1416 }
1417
1418 public void notifyModalityPopped(Dialog dialog) {
1419 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog);
1420 }
1421
1422 final void notifyModalityChange(int id, Dialog source) {
1423 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id);
1424 ev.dispatch();
1425 }
1426
1427 static class ModalityListenerList implements ModalityListener {
1428
1429 Vector<ModalityListener> listeners = new Vector<ModalityListener>();
1430
1431 void add(ModalityListener listener) {
1432 listeners.addElement(listener);
1433 }
1434
1435 void remove(ModalityListener listener) {
1436 listeners.removeElement(listener);
1437 }
1438
1439 public void modalityPushed(ModalityEvent ev) {
1440 Iterator<ModalityListener> it = listeners.iterator();
1441 while (it.hasNext()) {
1442 it.next().modalityPushed(ev);
1443 }
1444 }
1445
1446 public void modalityPopped(ModalityEvent ev) {
1447 Iterator<ModalityListener> it = listeners.iterator();
1448 while (it.hasNext()) {
1449 it.next().modalityPopped(ev);
1450 }
1451 }
1452 } // end of class ModalityListenerList
1453
1454 ///////////////////////////////////////////////////////////////////////////
1455 // End Plug-in code
1456 ///////////////////////////////////////////////////////////////////////////
1457
1458 public static boolean isLightweightOrUnknown(Component comp) {
1459 if (comp.isLightweight()
1460 || !(getDefaultToolkit() instanceof SunToolkit))
1461 {
1462 return true;
1463 }
1464 return !(comp instanceof Button
1465 || comp instanceof Canvas
1466 || comp instanceof Checkbox
1467 || comp instanceof Choice
1468 || comp instanceof Label
1469 || comp instanceof java.awt.List
1470 || comp instanceof Panel
1471 || comp instanceof Scrollbar
1472 || comp instanceof ScrollPane
1473 || comp instanceof TextArea
1474 || comp instanceof TextField
1475 || comp instanceof Window);
1476 }
1477
1478 @SuppressWarnings("serial")
1479 public static class OperationTimedOut extends RuntimeException {
1480 public OperationTimedOut(String msg) {
1481 super(msg);
1482 }
1483 public OperationTimedOut() {
1484 }
1485 }
1486
1487 @SuppressWarnings("serial")
1488 public static class InfiniteLoop extends RuntimeException {
1489 }
1490
1491 @SuppressWarnings("serial")
1492 public static class IllegalThreadException extends RuntimeException {
1493 public IllegalThreadException(String msg) {
1494 super(msg);
1495 }
1496 public IllegalThreadException() {
1497 }
1498 }
1499
1500 public static final int DEFAULT_WAIT_TIME = 10000;
1501 private static final int MAX_ITERS = 20;
1502 private static final int MIN_ITERS = 0;
1503 private static final int MINIMAL_EDELAY = 0;
1504
1505 /**
1506 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME).
1507 */
1508 public void realSync() throws OperationTimedOut, InfiniteLoop {
1509 realSync(DEFAULT_WAIT_TIME);
1510 }
1511
1512 /**
1513 * Forces toolkit to synchronize with the native windowing
1514 * sub-system, flushing all pending work and waiting for all the
1515 * events to be processed. This method guarantees that after
1516 * return no additional Java events will be generated, unless
1517 * cause by user. Obviously, the method cannot be used on the
1518 * event dispatch thread (EDT). In case it nevertheless gets
1519 * invoked on this thread, the method throws the
1520 * IllegalThreadException runtime exception.
1521 *
1522 * <p> This method allows to write tests without explicit timeouts
1523 * or wait for some event. Example:
1524 * <code>
1525 * Frame f = ...;
1526 * f.setVisible(true);
1527 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1528 * </code>
1529 *
1530 * <p> After realSync, <code>f</code> will be completely visible
1531 * on the screen, its getLocationOnScreen will be returning the
1532 * right result and it will be the focus owner.
1533 *
1534 * <p> Another example:
1535 * <code>
1536 * b.requestFocus();
1537 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync();
1538 * </code>
1539 *
1540 * <p> After realSync, <code>b</code> will be focus owner.
1541 *
1542 * <p> Notice that realSync isn't guaranteed to work if recurring
1543 * actions occur, such as if during processing of some event
1544 * another request which may generate some events occurs. By
1545 * default, sync tries to perform as much as {@value MAX_ITERS}
1546 * cycles of event processing, allowing for roughly {@value
1547 * MAX_ITERS} additional requests.
1548 *
1549 * <p> For example, requestFocus() generates native request, which
1550 * generates one or two Java focus events, which then generate a
1551 * serie of paint events, a serie of Java focus events, which then
1552 * generate a serie of paint events which then are processed -
1553 * three cycles, minimum.
1554 *
1555 * @param timeout the maximum time to wait in milliseconds, negative means "forever".
1556 */
1557 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop
1558 {
1559 if (EventQueue.isDispatchThread()) {
1560 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT).");
1561 }
1562 int bigLoop = 0;
1563 do {
1564 // Let's do sync first
1565 sync();
1566
1567 // During the wait process, when we were processing incoming
1568 // events, we could have made some new request, which can
1569 // generate new events. Example: MapNotify/XSetInputFocus.
1570 // Therefore, we dispatch them as long as there is something
1571 // to dispatch.
1572 int iters = 0;
1573 while (iters < MIN_ITERS) {
1574 syncNativeQueue(timeout);
1575 iters++;
1576 }
1577 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1578 iters++;
1579 }
1580 if (iters >= MAX_ITERS) {
1581 throw new InfiniteLoop();
1582 }
1583
1584 // native requests were dispatched by X/Window Manager or Windows
1585 // Moreover, we processed them all on Toolkit thread
1586 // Now wait while EDT processes them.
1587 //
1588 // During processing of some events (focus, for example),
1589 // some other events could have been generated. So, after
1590 // waitForIdle, we may end up with full EventQueue
1591 iters = 0;
1592 while (iters < MIN_ITERS) {
1593 waitForIdle(timeout);
1594 iters++;
1595 }
1596 while (waitForIdle(timeout) && iters < MAX_ITERS) {
1597 iters++;
1598 }
1599 if (iters >= MAX_ITERS) {
1600 throw new InfiniteLoop();
1601 }
1602
1603 bigLoop++;
1604 // Again, for Java events, it was simple to check for new Java
1605 // events by checking event queue, but what if Java events
1606 // resulted in native requests? Therefor, check native events again.
1607 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS);
1608 }
1609
1610 /**
1611 * Platform toolkits need to implement this method to perform the
1612 * sync of the native queue. The method should wait until native
1613 * requests are processed, all native events are processed and
1614 * corresponding Java events are generated. Should return
1615 * <code>true</code> if some events were processed,
1616 * <code>false</code> otherwise.
1617 */
1618 protected abstract boolean syncNativeQueue(final long timeout);
1619
1620 private boolean eventDispatched = false;
1621 private boolean queueEmpty = false;
1622 private final Object waitLock = "Wait Lock";
1623
1624 private boolean isEQEmpty() {
1625 EventQueue queue = getSystemEventQueueImpl();
1626 return AWTAccessor.getEventQueueAccessor().noEvents(queue);
1627 }
1628
1629 /**
1630 * Waits for the Java event queue to empty. Ensures that all
1631 * events are processed (including paint events), and that if
1632 * recursive events were generated, they are also processed.
1633 * Should return <code>true</code> if more processing is
1634 * necessary, <code>false</code> otherwise.
1635 */
1636 @SuppressWarnings("serial")
1637 protected final boolean waitForIdle(final long timeout) {
1638 flushPendingEvents();
1639 boolean queueWasEmpty = isEQEmpty();
1640 queueEmpty = false;
1641 eventDispatched = false;
1642 synchronized(waitLock) {
1643 postEvent(AppContext.getAppContext(),
1644 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) {
1645 public void dispatch() {
1646 // Here we block EDT. It could have some
1647 // events, it should have dispatched them by
1648 // now. So native requests could have been
1649 // generated. First, dispatch them. Then,
1650 // flush Java events again.
1651 int iters = 0;
1652 while (iters < MIN_ITERS) {
1653 syncNativeQueue(timeout);
1654 iters++;
1655 }
1656 while (syncNativeQueue(timeout) && iters < MAX_ITERS) {
1657 iters++;
1658 }
1659 flushPendingEvents();
1660
1661 synchronized(waitLock) {
1662 queueEmpty = isEQEmpty();
1663 eventDispatched = true;
1664 waitLock.notifyAll();
1665 }
1666 }
1667 });
1668 try {
1669 while (!eventDispatched) {
1670 waitLock.wait();
1671 }
1672 } catch (InterruptedException ie) {
1673 return false;
1674 }
1675 }
1676
1677 try {
1678 Thread.sleep(MINIMAL_EDELAY);
1679 } catch (InterruptedException ie) {
1680 throw new RuntimeException("Interrupted");
1681 }
1682
1683 flushPendingEvents();
1684
1685 // Lock to force write-cache flush for queueEmpty.
1686 synchronized (waitLock) {
1687 return !(queueEmpty && isEQEmpty() && queueWasEmpty);
1688 }
1689 }
1690
1691 /**
1692 * Grabs the mouse input for the given window. The window must be
1693 * visible. The window or its children do not receive any
1694 * additional mouse events besides those targeted to them. All
1695 * other events will be dispatched as before - to the respective
1696 * targets. This Window will receive UngrabEvent when automatic
1697 * ungrab is about to happen. The event can be listened to by
1698 * installing AWTEventListener with WINDOW_EVENT_MASK. See
1699 * UngrabEvent class for the list of conditions when ungrab is
1700 * about to happen.
1701 * @see UngrabEvent
1702 */
1703 public abstract void grab(Window w);
1704
1705 /**
1706 * Forces ungrab. No event will be sent.
1707 */
1708 public abstract void ungrab(Window w);
1709
1710
1711 /**
1712 * Locates the splash screen library in a platform dependent way and closes
1713 * the splash screen. Should be invoked on first top-level frame display.
1714 * @see java.awt.SplashScreen
1715 * @since 1.6
1716 */
1717 public static native void closeSplashScreen();
1718
1719 /* The following methods and variables are to support retrieving
1720 * desktop text anti-aliasing settings
1721 */
1722
1723 /* Need an instance method because setDesktopProperty(..) is protected. */
1724 private void fireDesktopFontPropertyChanges() {
1725 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS,
1726 SunToolkit.getDesktopFontHints());
1727 }
1728
1729 private static boolean checkedSystemAAFontSettings;
1730 private static boolean useSystemAAFontSettings;
1731 private static boolean lastExtraCondition = true;
1732 private static RenderingHints desktopFontHints;
1733
1734 /* Since Swing is the reason for this "extra condition" logic its
1735 * worth documenting it in some detail.
1736 * First, a goal is for Swing and applications to both retrieve and
1737 * use the same desktop property value so that there is complete
1738 * consistency between the settings used by JDK's Swing implementation
1739 * and 3rd party custom Swing components, custom L&Fs and any general
1740 * text rendering that wants to be consistent with these.
1741 * But by default on Solaris & Linux Swing will not use AA text over
1742 * remote X11 display (unless Xrender can be used which is TBD and may not
1743 * always be available anyway) as that is a noticeable performance hit.
1744 * So there needs to be a way to express that extra condition so that
1745 * it is seen by all clients of the desktop property API.
1746 * If this were the only condition it could be handled here as it would
1747 * be the same for any L&F and could reasonably be considered to be
1748 * a static behaviour of those systems.
1749 * But GTK currently has an additional test based on locale which is
1750 * not applied by Metal. So mixing GTK in a few locales with Metal
1751 * would mean the last one wins.
1752 * This could be stored per-app context which would work
1753 * for different applets, but wouldn't help for a single application
1754 * using GTK and some other L&F concurrently.
1755 * But it is expected this will be addressed within GTK and the font
1756 * system so is a temporary and somewhat unlikely harmless corner case.
1757 */
1758 public static void setAAFontSettingsCondition(boolean extraCondition) {
1759 if (extraCondition != lastExtraCondition) {
1760 lastExtraCondition = extraCondition;
1761 if (checkedSystemAAFontSettings) {
1762 /* Someone already asked for this info, under a different
1763 * condition.
1764 * We'll force re-evaluation instead of replicating the
1765 * logic, then notify any listeners of any change.
1766 */
1767 checkedSystemAAFontSettings = false;
1768 Toolkit tk = Toolkit.getDefaultToolkit();
1769 if (tk instanceof SunToolkit) {
1770 ((SunToolkit)tk).fireDesktopFontPropertyChanges();
1771 }
1772 }
1773 }
1774 }
1775
1776 /* "false", "off", ""default" aren't explicitly tested, they
1777 * just fall through to produce a null return which all are equated to
1778 * "false".
1779 */
1780 private static RenderingHints getDesktopAAHintsByName(String hintname) {
1781 Object aaHint = null;
1782 hintname = hintname.toLowerCase(Locale.ENGLISH);
1783 if (hintname.equals("on")) {
1784 aaHint = VALUE_TEXT_ANTIALIAS_ON;
1785 } else if (hintname.equals("gasp")) {
1786 aaHint = VALUE_TEXT_ANTIALIAS_GASP;
1787 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) {
1788 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB;
1789 } else if (hintname.equals("lcd_hbgr")) {
1790 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR;
1791 } else if (hintname.equals("lcd_vrgb")) {
1792 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB;
1793 } else if (hintname.equals("lcd_vbgr")) {
1794 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR;
1795 }
1796 if (aaHint != null) {
1797 RenderingHints map = new RenderingHints(null);
1798 map.put(KEY_TEXT_ANTIALIASING, aaHint);
1799 return map;
1800 } else {
1801 return null;
1802 }
1803 }
1804
1805 /* This method determines whether to use the system font settings,
1806 * or ignore them if a L&F has specified they should be ignored, or
1807 * to override both of these with a system property specified value.
1808 * If the toolkit isn't a SunToolkit, (eg may be headless) then that
1809 * system property isn't applied as desktop properties are considered
1810 * to be inapplicable in that case. In that headless case although
1811 * this method will return "true" the toolkit will return a null map.
1812 */
1813 private static boolean useSystemAAFontSettings() {
1814 if (!checkedSystemAAFontSettings) {
1815 useSystemAAFontSettings = true; /* initially set this true */
1816 String systemAAFonts = null;
1817 Toolkit tk = Toolkit.getDefaultToolkit();
1818 if (tk instanceof SunToolkit) {
1819 systemAAFonts =
1820 AccessController.doPrivileged(
1821 new GetPropertyAction("awt.useSystemAAFontSettings"));
1822 }
1823 if (systemAAFonts != null) {
1824 useSystemAAFontSettings =
1825 Boolean.valueOf(systemAAFonts).booleanValue();
1826 /* If it is anything other than "true", then it may be
1827 * a hint name , or it may be "off, "default", etc.
1828 */
1829 if (!useSystemAAFontSettings) {
1830 desktopFontHints = getDesktopAAHintsByName(systemAAFonts);
1831 }
1832 }
1833 /* If its still true, apply the extra condition */
1834 if (useSystemAAFontSettings) {
1835 useSystemAAFontSettings = lastExtraCondition;
1836 }
1837 checkedSystemAAFontSettings = true;
1838 }
1839 return useSystemAAFontSettings;
1840 }
1841
1842 /* A variable defined for the convenience of JDK code */
1843 public static final String DESKTOPFONTHINTS = "awt.font.desktophints";
1844
1845 /* Overridden by subclasses to return platform/desktop specific values */
1846 protected RenderingHints getDesktopAAHints() {
1847 return null;
1848 }
1849
1850 /* Subclass desktop property loading methods call this which
1851 * in turn calls the appropriate subclass implementation of
1852 * getDesktopAAHints() when system settings are being used.
1853 * Its public rather than protected because subclasses may delegate
1854 * to a helper class.
1855 */
1856 public static RenderingHints getDesktopFontHints() {
1857 if (useSystemAAFontSettings()) {
1858 Toolkit tk = Toolkit.getDefaultToolkit();
1859 if (tk instanceof SunToolkit) {
1860 Object map = ((SunToolkit)tk).getDesktopAAHints();
1861 return (RenderingHints)map;
1862 } else { /* Headless Toolkit */
1863 return null;
1864 }
1865 } else if (desktopFontHints != null) {
1866 /* cloning not necessary as the return value is cloned later, but
1867 * its harmless.
1868 */
1869 return (RenderingHints)(desktopFontHints.clone());
1870 } else {
1871 return null;
1872 }
1873 }
1874
1875
1876 public abstract boolean isDesktopSupported();
1877
1878 /*
1879 * consumeNextKeyTyped() method is not currently used,
1880 * however Swing could use it in the future.
1881 */
1882 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) {
1883 try {
1884 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped(
1885 (DefaultKeyboardFocusManager)KeyboardFocusManager.
1886 getCurrentKeyboardFocusManager(),
1887 keyEvent);
1888 } catch (ClassCastException cce) {
1889 cce.printStackTrace();
1890 }
1891 }
1892
1893 protected static void dumpPeers(final PlatformLogger aLog) {
1894 AWTAutoShutdown.getInstance().dumpPeers(aLog);
1895 }
1896
1897 /**
1898 * Returns the <code>Window</code> ancestor of the component <code>comp</code>.
1899 * @return Window ancestor of the component or component by itself if it is Window;
1900 * null, if component is not a part of window hierarchy
1901 */
1902 public static Window getContainingWindow(Component comp) {
1903 while (comp != null && !(comp instanceof Window)) {
1904 comp = comp.getParent();
1905 }
1906 return (Window)comp;
1907 }
1908
1909 private static Boolean sunAwtDisableMixing = null;
1910
1911 /**
1912 * Returns the value of "sun.awt.disableMixing" property. Default
1913 * value is {@code false}.
1914 */
1915 public synchronized static boolean getSunAwtDisableMixing() {
1916 if (sunAwtDisableMixing == null) {
1917 sunAwtDisableMixing = AccessController.doPrivileged(
1918 new GetBooleanAction("sun.awt.disableMixing"));
1919 }
1920 return sunAwtDisableMixing.booleanValue();
1921 }
1922
1923 /**
1924 * Returns true if the native GTK libraries are available. The
1925 * default implementation returns false, but UNIXToolkit overrides this
1926 * method to provide a more specific answer.
1927 */
1928 public boolean isNativeGTKAvailable() {
1929 return false;
1930 }
1931
1932 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object();
1933
1934 public synchronized void setWindowDeactivationTime(Window w, long time) {
1935 AppContext ctx = getAppContext(w);
1936 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1937 if (map == null) {
1938 map = new WeakHashMap<Window, Long>();
1939 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map);
1940 }
1941 map.put(w, time);
1942 }
1943
1944 public synchronized long getWindowDeactivationTime(Window w) {
1945 AppContext ctx = getAppContext(w);
1946 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY);
1947 if (map == null) {
1948 return -1;
1949 }
1950 Long time = map.get(w);
1951 return time == null ? -1 : time;
1952 }
1953
1954 // Cosntant alpha
1955 public boolean isWindowOpacitySupported() {
1956 return false;
1957 }
1958
1959 // Shaping
1960 public boolean isWindowShapingSupported() {
1961 return false;
1962 }
1963
1964 // Per-pixel alpha
1965 public boolean isWindowTranslucencySupported() {
1966 return false;
1967 }
1968
1969 public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
1970 return false;
1971 }
1972
1973 /**
1974 * Returns true if swing backbuffer should be translucent.
1975 */
1976 public boolean isSwingBackbufferTranslucencySupported() {
1977 return false;
1978 }
1979
1980 /**
1981 * Returns whether or not a containing top level window for the passed
1982 * component is
1983 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}.
1984 *
1985 * @param c a Component which toplevel's to check
1986 * @return {@code true} if the passed component is not null and has a
1987 * containing toplevel window which is opaque (so per-pixel translucency
1988 * is not enabled), {@code false} otherwise
1989 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT
1990 */
1991 public static boolean isContainingTopLevelOpaque(Component c) {
1992 Window w = getContainingWindow(c);
1993 return w != null && w.isOpaque();
1994 }
1995
1996 /**
1997 * Returns whether or not a containing top level window for the passed
1998 * component is
1999 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}.
2000 *
2001 * @param c a Component which toplevel's to check
2002 * @return {@code true} if the passed component is not null and has a
2003 * containing toplevel window which has opacity less than
2004 * 1.0f (which means that it is translucent), {@code false} otherwise
2005 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT
2006 */
2007 public static boolean isContainingTopLevelTranslucent(Component c) {
2008 Window w = getContainingWindow(c);
2009 return w != null && w.getOpacity() < 1.0f;
2010 }
2011
2012 /**
2013 * Returns whether the native system requires using the peer.updateWindow()
2014 * method to update the contents of a non-opaque window, or if usual
2015 * painting procedures are sufficient. The default return value covers
2016 * the X11 systems. On MS Windows this method is overriden in WToolkit
2017 * to return true.
2018 */
2019 public boolean needUpdateWindow() {
2020 return false;
2021 }
2022
2023 /**
2024 * Descendants of the SunToolkit should override and put their own logic here.
2025 */
2026 public int getNumberOfButtons(){
2027 return 3;
2028 }
2029
2030 /**
2031 * Checks that the given object implements/extends the given
2032 * interface/class.
2033 *
2034 * Note that using the instanceof operator causes a class to be loaded.
2035 * Using this method doesn't load a class and it can be used instead of
2036 * the instanceof operator for performance reasons.
2037 *
2038 * @param obj Object to be checked
2039 * @param type The name of the interface/class. Must be
2040 * fully-qualified interface/class name.
2041 * @return true, if this object implements/extends the given
2042 * interface/class, false, otherwise, or if obj or type is null
2043 */
2044 public static boolean isInstanceOf(Object obj, String type) {
2045 if (obj == null) return false;
2046 if (type == null) return false;
2047
2048 return isInstanceOf(obj.getClass(), type);
2049 }
2050
2051 private static boolean isInstanceOf(Class<?> cls, String type) {
2052 if (cls == null) return false;
2053
2054 if (cls.getName().equals(type)) {
2055 return true;
2056 }
2057
2058 for (Class<?> c : cls.getInterfaces()) {
2059 if (c.getName().equals(type)) {
2060 return true;
2061 }
2062 }
2063 return isInstanceOf(cls.getSuperclass(), type);
2064 }
2065
2066 protected static LightweightFrame getLightweightFrame(Component c) {
2067 for (; c != null; c = c.getParent()) {
2068 if (c instanceof LightweightFrame) {
2069 return (LightweightFrame)c;
2070 }
2071 if (c instanceof Window) {
2072 // Don't traverse owner windows
2073 return null;
2074 }
2075 }
2076 return null;
2077 }
2078
2079 ///////////////////////////////////////////////////////////////////////////
2080 //
2081 // The following methods help set and identify whether a particular
2082 // AWTEvent object was produced by the system or by user code. As of this
2083 // writing the only consumer is the Java Plug-In, although this information
2084 // could be useful to more clients and probably should be formalized in
2085 // the public API.
2086 //
2087 ///////////////////////////////////////////////////////////////////////////
2088
2089 public static void setSystemGenerated(AWTEvent e) {
2090 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e);
2091 }
2092
2093 public static boolean isSystemGenerated(AWTEvent e) {
2094 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e);
2095 }
2096
2097 } // class SunToolkit
2098
2099
2100 /*
2101 * PostEventQueue is a Thread that runs in the same AppContext as the
2102 * Java EventQueue. It is a queue of AWTEvents to be posted to the
2103 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts
2104 * events to this queue, which then calls EventQueue.postEvent().
2105 *
2106 * We do this because EventQueue.postEvent() may be overridden by client
2107 * code, and we mustn't ever call client code from the toolkit thread.
2108 */
2109 class PostEventQueue {
2110 private EventQueueItem queueHead = null;
2111 private EventQueueItem queueTail = null;
2112 private final EventQueue eventQueue;
2113
2114 private Thread flushThread = null;
2115
2116 PostEventQueue(EventQueue eq) {
2117 eventQueue = eq;
2118 }
2119
2120 /*
2121 * Continually post pending AWTEvents to the Java EventQueue. The method
2122 * is synchronized to ensure the flush is completed before a new event
2123 * can be posted to this queue.
2124 *
2125 * 7177040: The method couldn't be wholly synchronized because of calls
2126 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could
2127 * potentially lead to deadlock
2128 */
2129 public void flush() {
2130
2131 Thread newThread = Thread.currentThread();
2132
2133 try {
2134 EventQueueItem tempQueue;
2135 synchronized (this) {
2136 // Avoid method recursion
2137 if (newThread == flushThread) {
2138 return;
2139 }
2140 // Wait for other threads' flushing
2141 while (flushThread != null) {
2142 wait();
2143 }
2144 // Skip everything if queue is empty
2145 if (queueHead == null) {
2146 return;
2147 }
2148 // Remember flushing thread
2149 flushThread = newThread;
2150
2151 tempQueue = queueHead;
2152 queueHead = queueTail = null;
2153 }
2154 try {
2155 while (tempQueue != null) {
2156 eventQueue.postEvent(tempQueue.event);
2157 tempQueue = tempQueue.next;
2158 }
2159 }
2160 finally {
2161 // Only the flushing thread can get here
2162 synchronized (this) {
2163 // Forget flushing thread, inform other pending threads
2164 flushThread = null;
2165 notifyAll();
2166 }
2167 }
2168 }
2169 catch (InterruptedException e) {
2170 // Couldn't allow exception go up, so at least recover the flag
2171 newThread.interrupt();
2172 }
2173 }
2174
2175 /*
2176 * Enqueue an AWTEvent to be posted to the Java EventQueue.
2177 */
2178 void postEvent(AWTEvent event) {
2179 EventQueueItem item = new EventQueueItem(event);
2180
2181 synchronized (this) {
2182 if (queueHead == null) {
2183 queueHead = queueTail = item;
2184 } else {
2185 queueTail.next = item;
2186 queueTail = item;
2187 }
2188 }
2189 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance());
2190 }
2191 } // class PostEventQueue