1 /* 2 * Copyright (c) 1997, 2016, 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 java.awt.event.InputEvent; 30 import java.awt.event.KeyEvent; 31 import java.awt.event.WindowEvent; 32 import java.awt.image.BufferedImage; 33 import java.awt.image.DataBuffer; 34 import java.awt.image.DataBufferInt; 35 import java.awt.image.ImageObserver; 36 import java.awt.image.ImageProducer; 37 import java.awt.image.Raster; 38 import java.awt.peer.FramePeer; 39 import java.awt.peer.KeyboardFocusManagerPeer; 40 import java.awt.peer.MouseInfoPeer; 41 import java.awt.peer.SystemTrayPeer; 42 import java.awt.peer.TrayIconPeer; 43 import java.io.File; 44 import java.io.IOException; 45 import java.io.InputStream; 46 import java.lang.reflect.InvocationTargetException; 47 import java.net.URL; 48 import java.security.AccessController; 49 import java.util.Collections; 50 import java.util.Iterator; 51 import java.util.Locale; 52 import java.util.Map; 53 import java.util.Vector; 54 import java.util.WeakHashMap; 55 import java.util.concurrent.TimeUnit; 56 import java.util.concurrent.locks.Condition; 57 import java.util.concurrent.locks.ReentrantLock; 58 59 import sun.awt.im.InputContext; 60 import sun.awt.image.ByteArrayImageSource; 61 import sun.awt.image.FileImageSource; 62 import sun.awt.image.ImageRepresentation; 63 import java.awt.image.MultiResolutionImage; 64 import sun.awt.image.MultiResolutionToolkitImage; 65 import sun.awt.image.ToolkitImage; 66 import sun.awt.image.URLImageSource; 67 import sun.font.FontDesignMetrics; 68 import sun.misc.SoftCache; 69 import sun.net.util.URLUtil; 70 import sun.security.action.GetBooleanAction; 71 import sun.security.action.GetPropertyAction; 72 import sun.util.logging.PlatformLogger; 73 74 import static java.awt.RenderingHints.*; 75 76 public abstract class SunToolkit extends Toolkit 77 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 78 79 // 8014718: logging has been removed from SunToolkit 80 81 /* Load debug settings for native code */ 82 static { 83 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) { 84 DebugSettings.init(); 85 } 86 }; 87 88 /** 89 * Special mask for the UngrabEvent events, in addition to the 90 * public masks defined in AWTEvent. Should be used as the mask 91 * value for Toolkit.addAWTEventListener. 92 */ 93 public static final int GRAB_EVENT_MASK = 0x80000000; 94 95 /* The key to put()/get() the PostEventQueue into/from the AppContext. 96 */ 97 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 98 99 /** 100 * Number of buttons. 101 * By default it's taken from the system. If system value does not 102 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 103 */ 104 protected static int numberOfButtons = 0; 105 106 107 /* XFree standard mention 24 buttons as maximum: 108 * http://www.xfree86.org/current/mouse.4.html 109 * We workaround systems supporting more than 24 buttons. 110 * Otherwise, we have to use long type values as masks 111 * which leads to API change. 112 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 113 * the 4-bytes limit for the int type. (CR 6799099) 114 * One more bit is reserved for FIRST_HIGH_BIT. 115 */ 116 public static final int MAX_BUTTONS_SUPPORTED = 20; 117 118 /** 119 * Creates and initializes EventQueue instance for the specified 120 * AppContext. 121 * Note that event queue must be created from createNewAppContext() 122 * only in order to ensure that EventQueue constructor obtains 123 * the correct AppContext. 124 * @param appContext AppContext to associate with the event queue 125 */ 126 private static void initEQ(AppContext appContext) { 127 EventQueue eventQueue = new EventQueue(); 128 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 129 130 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 131 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 132 } 133 134 public SunToolkit() { 135 } 136 137 public boolean useBufferPerWindow() { 138 return false; 139 } 140 141 public abstract FramePeer createLightweightFrame(LightweightFrame target) 142 throws HeadlessException; 143 144 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 145 throws HeadlessException, AWTException; 146 147 public abstract SystemTrayPeer createSystemTray(SystemTray target); 148 149 public abstract boolean isTraySupported(); 150 151 @Override 152 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer() 153 throws HeadlessException; 154 155 /** 156 * The AWT lock is typically only used on Unix platforms to synchronize 157 * access to Xlib, OpenGL, etc. However, these methods are implemented 158 * in SunToolkit so that they can be called from shared code (e.g. 159 * from the OGL pipeline) or from the X11 pipeline regardless of whether 160 * XToolkit or MToolkit is currently in use. There are native macros 161 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 162 * methods is changed, make sure it is compatible with the native macros. 163 * 164 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 165 * used in place of: 166 * synchronized (getAWTLock()) { 167 * ... 168 * } 169 * 170 * By factoring these methods out specially, we are able to change the 171 * implementation of these methods (e.g. use more advanced locking 172 * mechanisms) without impacting calling code. 173 * 174 * Sample usage: 175 * private void doStuffWithXlib() { 176 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 177 * SunToolkit.awtLock(); 178 * try { 179 * ... 180 * XlibWrapper.XDoStuff(); 181 * } finally { 182 * SunToolkit.awtUnlock(); 183 * } 184 * } 185 */ 186 187 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 188 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 189 190 public static final void awtLock() { 191 AWT_LOCK.lock(); 192 } 193 194 public static final boolean awtTryLock() { 195 return AWT_LOCK.tryLock(); 196 } 197 198 public static final void awtUnlock() { 199 AWT_LOCK.unlock(); 200 } 201 202 public static final void awtLockWait() 203 throws InterruptedException 204 { 205 AWT_LOCK_COND.await(); 206 } 207 208 public static final void awtLockWait(long timeout) 209 throws InterruptedException 210 { 211 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 212 } 213 214 public static final void awtLockNotify() { 215 AWT_LOCK_COND.signal(); 216 } 217 218 public static final void awtLockNotifyAll() { 219 AWT_LOCK_COND.signalAll(); 220 } 221 222 public static final boolean isAWTLockHeldByCurrentThread() { 223 return AWT_LOCK.isHeldByCurrentThread(); 224 } 225 226 /* 227 * Create a new AppContext, along with its EventQueue, for a 228 * new ThreadGroup. Browser code, for example, would use this 229 * method to create an AppContext & EventQueue for an Applet. 230 */ 231 public static AppContext createNewAppContext() { 232 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 233 return createNewAppContext(threadGroup); 234 } 235 236 static final AppContext createNewAppContext(ThreadGroup threadGroup) { 237 // Create appContext before initialization of EventQueue, so all 238 // the calls to AppContext.getAppContext() from EventQueue ctor 239 // return correct values 240 AppContext appContext = new AppContext(threadGroup); 241 initEQ(appContext); 242 243 return appContext; 244 } 245 246 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 247 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown); 248 } 249 250 /* 251 * Fetch the peer associated with the given target (as specified 252 * in the peer creation method). This can be used to determine 253 * things like what the parent peer is. If the target is null 254 * or the target can't be found (either because the a peer was 255 * never created for it or the peer was disposed), a null will 256 * be returned. 257 */ 258 protected static Object targetToPeer(Object target) { 259 if (target != null && !GraphicsEnvironment.isHeadless()) { 260 return AWTAutoShutdown.getInstance().getPeer(target); 261 } 262 return null; 263 } 264 265 protected static void targetCreatedPeer(Object target, Object peer) { 266 if (target != null && peer != null && 267 !GraphicsEnvironment.isHeadless()) 268 { 269 AWTAutoShutdown.getInstance().registerPeer(target, peer); 270 } 271 } 272 273 protected static void targetDisposedPeer(Object target, Object peer) { 274 if (target != null && peer != null && 275 !GraphicsEnvironment.isHeadless()) 276 { 277 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 278 } 279 } 280 281 // Maps from non-Component/MenuComponent to AppContext. 282 // WeakHashMap<Component,AppContext> 283 private static final Map<Object, AppContext> appContextMap = 284 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>()); 285 286 /** 287 * Sets the appContext field of target. If target is not a Component or 288 * MenuComponent, this returns false. 289 */ 290 private static boolean setAppContext(Object target, 291 AppContext context) { 292 if (target instanceof Component) { 293 AWTAccessor.getComponentAccessor(). 294 setAppContext((Component)target, context); 295 } else if (target instanceof MenuComponent) { 296 AWTAccessor.getMenuComponentAccessor(). 297 setAppContext((MenuComponent)target, context); 298 } else { 299 return false; 300 } 301 return true; 302 } 303 304 /** 305 * Returns the appContext field for target. If target is not a 306 * Component or MenuComponent this returns null. 307 */ 308 private static AppContext getAppContext(Object target) { 309 if (target instanceof Component) { 310 return AWTAccessor.getComponentAccessor(). 311 getAppContext((Component)target); 312 } else if (target instanceof MenuComponent) { 313 return AWTAccessor.getMenuComponentAccessor(). 314 getAppContext((MenuComponent)target); 315 } else { 316 return null; 317 } 318 } 319 320 /* 321 * Fetch the AppContext associated with the given target. 322 * This can be used to determine things like which EventQueue 323 * to use for posting events to a Component. If the target is 324 * null or the target can't be found, a null with be returned. 325 */ 326 public static AppContext targetToAppContext(Object target) { 327 if (target == null) { 328 return null; 329 } 330 AppContext context = getAppContext(target); 331 if (context == null) { 332 // target is not a Component/MenuComponent, try the 333 // appContextMap. 334 context = appContextMap.get(target); 335 } 336 return context; 337 } 338 339 /** 340 * Sets the synchronous status of focus requests on lightweight 341 * components in the specified window to the specified value. 342 * If the boolean parameter is {@code true} then the focus 343 * requests on lightweight components will be performed 344 * synchronously, if it is {@code false}, then asynchronously. 345 * By default, all windows have their lightweight request status 346 * set to asynchronous. 347 * <p> 348 * The application can only set the status of lightweight focus 349 * requests to synchronous for any of its windows if it doesn't 350 * perform focus transfers between different heavyweight containers. 351 * In this case the observable focus behaviour is the same as with 352 * asynchronous status. 353 * <p> 354 * If the application performs focus transfer between different 355 * heavyweight containers and sets the lightweight focus request 356 * status to synchronous for any of its windows, then further focus 357 * behaviour is unspecified. 358 * <p> 359 * @param changed the window for which the lightweight focus request 360 * status should be set 361 * @param status the value of lightweight focus request status 362 */ 363 364 public static void setLWRequestStatus(Window changed,boolean status){ 365 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 366 }; 367 368 public static void checkAndSetPolicy(Container cont) { 369 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager. 370 getCurrentKeyboardFocusManager(). 371 getDefaultFocusTraversalPolicy(); 372 373 cont.setFocusTraversalPolicy(defaultPolicy); 374 } 375 376 private static FocusTraversalPolicy createLayoutPolicy() { 377 FocusTraversalPolicy policy = null; 378 try { 379 Class<?> layoutPolicyClass = 380 Class.forName("javax.swing.LayoutFocusTraversalPolicy"); 381 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance(); 382 } 383 catch (ClassNotFoundException e) { 384 assert false; 385 } 386 catch (InstantiationException e) { 387 assert false; 388 } 389 catch (IllegalAccessException e) { 390 assert false; 391 } 392 393 return policy; 394 } 395 396 /* 397 * Insert a mapping from target to AppContext, for later retrieval 398 * via targetToAppContext() above. 399 */ 400 public static void insertTargetMapping(Object target, AppContext appContext) { 401 if (!setAppContext(target, appContext)) { 402 // Target is not a Component/MenuComponent, use the private Map 403 // instead. 404 appContextMap.put(target, appContext); 405 } 406 } 407 408 /* 409 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 410 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 411 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 412 * not be called under another lock since it locks the EventQueue. 413 * See bugids 4632918, 4526597. 414 */ 415 public static void postEvent(AppContext appContext, AWTEvent event) { 416 if (event == null) { 417 throw new NullPointerException(); 418 } 419 420 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor(); 421 if (sea != null && sea.isSequencedEvent(event)) { 422 AWTEvent nested = sea.getNested(event); 423 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS && 424 nested instanceof TimedWindowEvent) 425 { 426 TimedWindowEvent twe = (TimedWindowEvent)nested; 427 ((SunToolkit)Toolkit.getDefaultToolkit()). 428 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen()); 429 } 430 } 431 432 // All events posted via this method are system-generated. 433 // Placing the following call here reduces considerably the 434 // number of places throughout the toolkit that would 435 // otherwise have to be modified to precisely identify 436 // system-generated events. 437 setSystemGenerated(event); 438 AppContext eventContext = targetToAppContext(event.getSource()); 439 if (eventContext != null && !eventContext.equals(appContext)) { 440 throw new RuntimeException("Event posted on wrong app context : " + event); 441 } 442 PostEventQueue postEventQueue = 443 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 444 if (postEventQueue != null) { 445 postEventQueue.postEvent(event); 446 } 447 } 448 449 /* 450 * Post AWTEvent of high priority. 451 */ 452 public static void postPriorityEvent(final AWTEvent e) { 453 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 454 @Override 455 public void run() { 456 AWTAccessor.getAWTEventAccessor().setPosted(e); 457 ((Component)e.getSource()).dispatchEvent(e); 458 } 459 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 460 postEvent(targetToAppContext(e.getSource()), pe); 461 } 462 463 /* 464 * Flush any pending events which haven't been posted to the AWT 465 * EventQueue yet. 466 */ 467 public static void flushPendingEvents() { 468 AppContext appContext = AppContext.getAppContext(); 469 flushPendingEvents(appContext); 470 } 471 472 /* 473 * Flush the PostEventQueue for the right AppContext. 474 * The default flushPendingEvents only flushes the thread-local context, 475 * which is not always correct, c.f. 3746956 476 */ 477 public static void flushPendingEvents(AppContext appContext) { 478 PostEventQueue postEventQueue = 479 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 480 if (postEventQueue != null) { 481 postEventQueue.flush(); 482 } 483 } 484 485 /* 486 * Execute a chunk of code on the Java event handler thread for the 487 * given target. Does not wait for the execution to occur before 488 * returning to the caller. 489 */ 490 public static void executeOnEventHandlerThread(Object target, 491 Runnable runnable) { 492 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 493 } 494 495 /* 496 * Fixed 5064013: the InvocationEvent time should be equals 497 * the time of the ActionEvent 498 */ 499 @SuppressWarnings("serial") 500 public static void executeOnEventHandlerThread(Object target, 501 Runnable runnable, 502 final long when) { 503 executeOnEventHandlerThread( 504 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 505 @Override 506 public long getWhen() { 507 return when; 508 } 509 }); 510 } 511 512 /* 513 * Execute a chunk of code on the Java event handler thread for the 514 * given target. Does not wait for the execution to occur before 515 * returning to the caller. 516 */ 517 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 518 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 519 } 520 521 /* 522 * Execute a chunk of code on the Java event handler thread. The 523 * method takes into account provided AppContext and sets 524 * {@code SunToolkit.getDefaultToolkit()} as a target of the 525 * event. See 6451487 for detailes. 526 * Does not wait for the execution to occur before returning to 527 * the caller. 528 */ 529 public static void invokeLaterOnAppContext( 530 AppContext appContext, Runnable dispatcher) 531 { 532 postEvent(appContext, 533 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 534 PeerEvent.PRIORITY_EVENT)); 535 } 536 537 /* 538 * Execute a chunk of code on the Java event handler thread for the 539 * given target. Waits for the execution to occur before returning 540 * to the caller. 541 */ 542 public static void executeOnEDTAndWait(Object target, Runnable runnable) 543 throws InterruptedException, InvocationTargetException 544 { 545 if (EventQueue.isDispatchThread()) { 546 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 547 } 548 549 class AWTInvocationLock {} 550 Object lock = new AWTInvocationLock(); 551 552 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 553 554 synchronized (lock) { 555 executeOnEventHandlerThread(event); 556 while(!event.isDispatched()) { 557 lock.wait(); 558 } 559 } 560 561 Throwable eventThrowable = event.getThrowable(); 562 if (eventThrowable != null) { 563 throw new InvocationTargetException(eventThrowable); 564 } 565 } 566 567 /* 568 * Returns true if the calling thread is the event dispatch thread 569 * contained within AppContext which associated with the given target. 570 * Use this call to ensure that a given task is being executed 571 * (or not being) on the event dispatch thread for the given target. 572 */ 573 public static boolean isDispatchThreadForAppContext(Object target) { 574 AppContext appContext = targetToAppContext(target); 575 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 576 577 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 578 return accessor.isDispatchThreadImpl(eq); 579 } 580 581 @Override 582 public Dimension getScreenSize() { 583 return new Dimension(getScreenWidth(), getScreenHeight()); 584 } 585 protected abstract int getScreenWidth(); 586 protected abstract int getScreenHeight(); 587 588 @Override 589 @SuppressWarnings("deprecation") 590 public FontMetrics getFontMetrics(Font font) { 591 return FontDesignMetrics.getMetrics(font); 592 } 593 594 @Override 595 @SuppressWarnings("deprecation") 596 public String[] getFontList() { 597 String[] hardwiredFontList = { 598 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 599 Font.DIALOG_INPUT 600 601 // -- Obsolete font names from 1.0.2. It was decided that 602 // -- getFontList should not return these old names: 603 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 604 }; 605 return hardwiredFontList; 606 } 607 608 /** 609 * Disables erasing of background on the canvas before painting if 610 * this is supported by the current toolkit. It is recommended to 611 * call this method early, before the Canvas becomes displayable, 612 * because some Toolkit implementations do not support changing 613 * this property once the Canvas becomes displayable. 614 */ 615 public void disableBackgroundErase(Canvas canvas) { 616 disableBackgroundEraseImpl(canvas); 617 } 618 619 /** 620 * Disables the native erasing of the background on the given 621 * component before painting if this is supported by the current 622 * toolkit. This only has an effect for certain components such as 623 * Canvas, Panel and Window. It is recommended to call this method 624 * early, before the Component becomes displayable, because some 625 * Toolkit implementations do not support changing this property 626 * once the Component becomes displayable. 627 */ 628 public void disableBackgroundErase(Component component) { 629 disableBackgroundEraseImpl(component); 630 } 631 632 private void disableBackgroundEraseImpl(Component component) { 633 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 634 } 635 636 /** 637 * Returns the value of "sun.awt.noerasebackground" property. Default 638 * value is {@code false}. 639 */ 640 public static boolean getSunAwtNoerasebackground() { 641 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 642 } 643 644 /** 645 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 646 * value is {@code false}. 647 */ 648 public static boolean getSunAwtErasebackgroundonresize() { 649 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 650 } 651 652 653 @SuppressWarnings("deprecation") 654 static final SoftCache fileImgCache = new SoftCache(); 655 656 @SuppressWarnings("deprecation") 657 static final SoftCache urlImgCache = new SoftCache(); 658 659 static Image getImageFromHash(Toolkit tk, URL url) { 660 checkPermissions(url); 661 synchronized (urlImgCache) { 662 String key = (url == null) ? null : url.toString(); 663 Image img = (Image)urlImgCache.get(key); 664 if (img == null) { 665 try { 666 img = tk.createImage(new URLImageSource(url)); 667 urlImgCache.put(key, img); 668 } catch (Exception e) { 669 } 670 } 671 return img; 672 } 673 } 674 675 static Image getImageFromHash(Toolkit tk, 676 String filename) { 677 checkPermissions(filename); 678 synchronized (fileImgCache) { 679 Image img = (Image)fileImgCache.get(filename); 680 if (img == null) { 681 try { 682 img = tk.createImage(new FileImageSource(filename)); 683 fileImgCache.put(filename, img); 684 } catch (Exception e) { 685 } 686 } 687 return img; 688 } 689 } 690 691 @Override 692 public Image getImage(String filename) { 693 return getImageFromHash(this, filename); 694 } 695 696 @Override 697 public Image getImage(URL url) { 698 return getImageFromHash(this, url); 699 } 700 701 protected Image getImageWithResolutionVariant(String fileName, 702 String resolutionVariantName) { 703 synchronized (fileImgCache) { 704 Image image = getImageFromHash(this, fileName); 705 if (image instanceof MultiResolutionImage) { 706 return image; 707 } 708 Image resolutionVariant = getImageFromHash(this, resolutionVariantName); 709 image = createImageWithResolutionVariant(image, resolutionVariant); 710 fileImgCache.put(fileName, image); 711 return image; 712 } 713 } 714 715 protected Image getImageWithResolutionVariant(URL url, 716 URL resolutionVariantURL) { 717 synchronized (urlImgCache) { 718 Image image = getImageFromHash(this, url); 719 if (image instanceof MultiResolutionImage) { 720 return image; 721 } 722 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL); 723 image = createImageWithResolutionVariant(image, resolutionVariant); 724 String key = url.toString(); 725 urlImgCache.put(key, image); 726 return image; 727 } 728 } 729 730 731 @Override 732 public Image createImage(String filename) { 733 checkPermissions(filename); 734 return createImage(new FileImageSource(filename)); 735 } 736 737 @Override 738 public Image createImage(URL url) { 739 checkPermissions(url); 740 return createImage(new URLImageSource(url)); 741 } 742 743 @Override 744 public Image createImage(byte[] data, int offset, int length) { 745 return createImage(new ByteArrayImageSource(data, offset, length)); 746 } 747 748 @Override 749 public Image createImage(ImageProducer producer) { 750 return new ToolkitImage(producer); 751 } 752 753 public static Image createImageWithResolutionVariant(Image image, 754 Image resolutionVariant) { 755 return new MultiResolutionToolkitImage(image, resolutionVariant); 756 } 757 758 @Override 759 public int checkImage(Image img, int w, int h, ImageObserver o) { 760 if (!(img instanceof ToolkitImage)) { 761 return ImageObserver.ALLBITS; 762 } 763 764 ToolkitImage tkimg = (ToolkitImage)img; 765 int repbits; 766 if (w == 0 || h == 0) { 767 repbits = ImageObserver.ALLBITS; 768 } else { 769 repbits = tkimg.getImageRep().check(o); 770 } 771 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o); 772 } 773 774 @Override 775 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 776 if (w == 0 || h == 0) { 777 return true; 778 } 779 780 // Must be a ToolkitImage 781 if (!(img instanceof ToolkitImage)) { 782 return true; 783 } 784 785 ToolkitImage tkimg = (ToolkitImage)img; 786 if (tkimg.hasError()) { 787 if (o != null) { 788 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 789 -1, -1, -1, -1); 790 } 791 return false; 792 } 793 ImageRepresentation ir = tkimg.getImageRep(); 794 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o); 795 } 796 797 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) { 798 ToolkitImage rvImage = getResolutionVariant(img); 799 int rvw = getRVSize(w); 800 int rvh = getRVSize(h); 801 // Ignore the resolution variant in case of error 802 return (rvImage == null || rvImage.hasError()) ? 0xFFFF : 803 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage. 804 getResolutionVariantObserver( 805 img, o, w, h, rvw, rvh, true)); 806 } 807 808 private boolean prepareResolutionVariant(Image img, int w, int h, 809 ImageObserver o) { 810 811 ToolkitImage rvImage = getResolutionVariant(img); 812 int rvw = getRVSize(w); 813 int rvh = getRVSize(h); 814 // Ignore the resolution variant in case of error 815 return rvImage == null || rvImage.hasError() || prepareImage( 816 rvImage, rvw, rvh, 817 MultiResolutionToolkitImage.getResolutionVariantObserver( 818 img, o, w, h, rvw, rvh, true)); 819 } 820 821 private static int getRVSize(int size){ 822 return size == -1 ? -1 : 2 * size; 823 } 824 825 private static ToolkitImage getResolutionVariant(Image image) { 826 if (image instanceof MultiResolutionToolkitImage) { 827 Image resolutionVariant = ((MultiResolutionToolkitImage) image). 828 getResolutionVariant(); 829 if (resolutionVariant instanceof ToolkitImage) { 830 return (ToolkitImage) resolutionVariant; 831 } 832 } 833 return null; 834 } 835 836 protected static boolean imageCached(String fileName) { 837 return fileImgCache.containsKey(fileName); 838 } 839 840 protected static boolean imageCached(URL url) { 841 String key = url.toString(); 842 return urlImgCache.containsKey(key); 843 } 844 845 protected static boolean imageExists(String filename) { 846 if (filename != null) { 847 checkPermissions(filename); 848 return new File(filename).exists(); 849 } 850 return false; 851 } 852 853 @SuppressWarnings("try") 854 protected static boolean imageExists(URL url) { 855 if (url != null) { 856 checkPermissions(url); 857 try (InputStream is = url.openStream()) { 858 return true; 859 }catch(IOException e){ 860 return false; 861 } 862 } 863 return false; 864 } 865 866 private static void checkPermissions(String filename) { 867 SecurityManager security = System.getSecurityManager(); 868 if (security != null) { 869 security.checkRead(filename); 870 } 871 } 872 873 private static void checkPermissions(URL url) { 874 SecurityManager sm = System.getSecurityManager(); 875 if (sm != null) { 876 try { 877 java.security.Permission perm = 878 URLUtil.getConnectPermission(url); 879 if (perm != null) { 880 try { 881 sm.checkPermission(perm); 882 } catch (SecurityException se) { 883 // fallback to checkRead/checkConnect for pre 1.2 884 // security managers 885 if ((perm instanceof java.io.FilePermission) && 886 perm.getActions().indexOf("read") != -1) { 887 sm.checkRead(perm.getName()); 888 } else if ((perm instanceof 889 java.net.SocketPermission) && 890 perm.getActions().indexOf("connect") != -1) { 891 sm.checkConnect(url.getHost(), url.getPort()); 892 } else { 893 throw se; 894 } 895 } 896 } 897 } catch (java.io.IOException ioe) { 898 sm.checkConnect(url.getHost(), url.getPort()); 899 } 900 } 901 } 902 903 /** 904 * Scans {@code imageList} for best-looking image of specified dimensions. 905 * Image can be scaled and/or padded with transparency. 906 */ 907 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) { 908 if (width == 0 || height == 0) { 909 return null; 910 } 911 Image bestImage = null; 912 int bestWidth = 0; 913 int bestHeight = 0; 914 double bestSimilarity = 3; //Impossibly high value 915 double bestScaleFactor = 0; 916 for (Iterator<Image> i = imageList.iterator();i.hasNext();) { 917 //Iterate imageList looking for best matching image. 918 //'Similarity' measure is defined as good scale factor and small insets. 919 //best possible similarity is 0 (no scale, no insets). 920 //It's found while the experiments that good-looking result is achieved 921 //with scale factors x1, x3/4, x2/3, xN, x1/N. 922 Image im = i.next(); 923 if (im == null) { 924 continue; 925 } 926 if (im instanceof ToolkitImage) { 927 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 928 ir.reconstruct(ImageObserver.ALLBITS); 929 } 930 int iw; 931 int ih; 932 try { 933 iw = im.getWidth(null); 934 ih = im.getHeight(null); 935 } catch (Exception e){ 936 continue; 937 } 938 if (iw > 0 && ih > 0) { 939 //Calc scale factor 940 double scaleFactor = Math.min((double)width / (double)iw, 941 (double)height / (double)ih); 942 //Calculate scaled image dimensions 943 //adjusting scale factor to nearest "good" value 944 int adjw = 0; 945 int adjh = 0; 946 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 947 if (scaleFactor >= 2) { 948 //Need to enlarge image more than twice 949 //Round down scale factor to multiply by integer value 950 scaleFactor = Math.floor(scaleFactor); 951 adjw = iw * (int)scaleFactor; 952 adjh = ih * (int)scaleFactor; 953 scaleMeasure = 1.0 - 0.5 / scaleFactor; 954 } else if (scaleFactor >= 1) { 955 //Don't scale 956 scaleFactor = 1.0; 957 adjw = iw; 958 adjh = ih; 959 scaleMeasure = 0; 960 } else if (scaleFactor >= 0.75) { 961 //Multiply by 3/4 962 scaleFactor = 0.75; 963 adjw = iw * 3 / 4; 964 adjh = ih * 3 / 4; 965 scaleMeasure = 0.3; 966 } else if (scaleFactor >= 0.6666) { 967 //Multiply by 2/3 968 scaleFactor = 0.6666; 969 adjw = iw * 2 / 3; 970 adjh = ih * 2 / 3; 971 scaleMeasure = 0.33; 972 } else { 973 //Multiply size by 1/scaleDivider 974 //where scaleDivider is minimum possible integer 975 //larger than 1/scaleFactor 976 double scaleDivider = Math.ceil(1.0 / scaleFactor); 977 scaleFactor = 1.0 / scaleDivider; 978 adjw = (int)Math.round((double)iw / scaleDivider); 979 adjh = (int)Math.round((double)ih / scaleDivider); 980 scaleMeasure = 1.0 - 1.0 / scaleDivider; 981 } 982 double similarity = ((double)width - (double)adjw) / (double)width + 983 ((double)height - (double)adjh) / (double)height + //Large padding is bad 984 scaleMeasure; //Large rescale is bad 985 if (similarity < bestSimilarity) { 986 bestSimilarity = similarity; 987 bestScaleFactor = scaleFactor; 988 bestImage = im; 989 bestWidth = adjw; 990 bestHeight = adjh; 991 } 992 if (similarity == 0) break; 993 } 994 } 995 if (bestImage == null) { 996 //No images were found, possibly all are broken 997 return null; 998 } 999 BufferedImage bimage = 1000 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 1001 Graphics2D g = bimage.createGraphics(); 1002 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 1003 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 1004 try { 1005 int x = (width - bestWidth) / 2; 1006 int y = (height - bestHeight) / 2; 1007 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 1008 } finally { 1009 g.dispose(); 1010 } 1011 return bimage; 1012 } 1013 1014 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1015 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1016 if (bimage == null) { 1017 return null; 1018 } 1019 Raster raster = bimage.getRaster(); 1020 DataBuffer buffer = raster.getDataBuffer(); 1021 return (DataBufferInt)buffer; 1022 } 1023 1024 @Override 1025 protected EventQueue getSystemEventQueueImpl() { 1026 return getSystemEventQueueImplPP(); 1027 } 1028 1029 // Package private implementation 1030 static EventQueue getSystemEventQueueImplPP() { 1031 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1032 } 1033 1034 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1035 EventQueue theEventQueue = 1036 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1037 return theEventQueue; 1038 } 1039 1040 /** 1041 * Give native peers the ability to query the native container 1042 * given a native component (eg the direct parent may be lightweight). 1043 */ 1044 public static Container getNativeContainer(Component c) { 1045 return Toolkit.getNativeContainer(c); 1046 } 1047 1048 /** 1049 * Gives native peers the ability to query the closest HW component. 1050 * If the given component is heavyweight, then it returns this. Otherwise, 1051 * it goes one level up in the hierarchy and tests next component. 1052 */ 1053 public static Component getHeavyweightComponent(Component c) { 1054 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1055 c = AWTAccessor.getComponentAccessor().getParent(c); 1056 } 1057 return c; 1058 } 1059 1060 /** 1061 * Returns key modifiers used by Swing to set up a focus accelerator key stroke. 1062 */ 1063 public int getFocusAcceleratorKeyMask() { 1064 return InputEvent.ALT_MASK; 1065 } 1066 1067 /** 1068 * Tests whether specified key modifiers mask can be used to enter a printable 1069 * character. This is a default implementation of this method, which reflects 1070 * the way things work on Windows: here, pressing ctrl + alt allows user to enter 1071 * characters from the extended character set (like euro sign or math symbols) 1072 */ 1073 public boolean isPrintableCharacterModifiersMask(int mods) { 1074 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK)); 1075 } 1076 1077 /** 1078 * Returns whether popup is allowed to be shown above the task bar. 1079 * This is a default implementation of this method, which checks 1080 * corresponding security permission. 1081 */ 1082 public boolean canPopupOverlapTaskBar() { 1083 boolean result = true; 1084 try { 1085 SecurityManager sm = System.getSecurityManager(); 1086 if (sm != null) { 1087 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION); 1088 } 1089 } catch (SecurityException se) { 1090 // There is no permission to show popups over the task bar 1091 result = false; 1092 } 1093 return result; 1094 } 1095 1096 /** 1097 * Returns a new input method window, with behavior as specified in 1098 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1099 * If the inputContext is not null, the window should return it from its 1100 * getInputContext() method. The window needs to implement 1101 * sun.awt.im.InputMethodWindow. 1102 * <p> 1103 * SunToolkit subclasses can override this method to return better input 1104 * method windows. 1105 */ 1106 @Override 1107 public Window createInputMethodWindow(String title, InputContext context) { 1108 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1109 } 1110 1111 /** 1112 * Returns whether enableInputMethods should be set to true for peered 1113 * TextComponent instances on this platform. False by default. 1114 */ 1115 @Override 1116 public boolean enableInputMethodsForTextComponent() { 1117 return false; 1118 } 1119 1120 private static Locale startupLocale = null; 1121 1122 /** 1123 * Returns the locale in which the runtime was started. 1124 */ 1125 public static Locale getStartupLocale() { 1126 if (startupLocale == null) { 1127 String language, region, country, variant; 1128 language = AccessController.doPrivileged( 1129 new GetPropertyAction("user.language", "en")); 1130 // for compatibility, check for old user.region property 1131 region = AccessController.doPrivileged( 1132 new GetPropertyAction("user.region")); 1133 if (region != null) { 1134 // region can be of form country, country_variant, or _variant 1135 int i = region.indexOf('_'); 1136 if (i >= 0) { 1137 country = region.substring(0, i); 1138 variant = region.substring(i + 1); 1139 } else { 1140 country = region; 1141 variant = ""; 1142 } 1143 } else { 1144 country = AccessController.doPrivileged( 1145 new GetPropertyAction("user.country", "")); 1146 variant = AccessController.doPrivileged( 1147 new GetPropertyAction("user.variant", "")); 1148 } 1149 startupLocale = new Locale(language, country, variant); 1150 } 1151 return startupLocale; 1152 } 1153 1154 /** 1155 * Returns the default keyboard locale of the underlying operating system 1156 */ 1157 @Override 1158 public Locale getDefaultKeyboardLocale() { 1159 return getStartupLocale(); 1160 } 1161 1162 /** 1163 * Returns whether default toolkit needs the support of the xembed 1164 * from embedding host(if any). 1165 * @return {@code true}, if XEmbed is needed, {@code false} otherwise 1166 */ 1167 public static boolean needsXEmbed() { 1168 String noxembed = AccessController. 1169 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1170 if ("true".equals(noxembed)) { 1171 return false; 1172 } 1173 1174 Toolkit tk = Toolkit.getDefaultToolkit(); 1175 if (tk instanceof SunToolkit) { 1176 // SunToolkit descendants should override this method to specify 1177 // concrete behavior 1178 return ((SunToolkit)tk).needsXEmbedImpl(); 1179 } else { 1180 // Non-SunToolkit doubtly might support XEmbed 1181 return false; 1182 } 1183 } 1184 1185 /** 1186 * Returns whether this toolkit needs the support of the xembed 1187 * from embedding host(if any). 1188 * @return {@code true}, if XEmbed is needed, {@code false} otherwise 1189 */ 1190 protected boolean needsXEmbedImpl() { 1191 return false; 1192 } 1193 1194 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1195 1196 /** 1197 * Returns whether the XEmbed server feature is requested by 1198 * developer. If true, Toolkit should return an 1199 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1200 */ 1201 protected final boolean isXEmbedServerRequested() { 1202 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1203 } 1204 1205 /** 1206 * Returns whether the modal exclusion API is supported by the current toolkit. 1207 * When it isn't supported, calling {@code setModalExcluded} has no 1208 * effect, and {@code isModalExcluded} returns false for all windows. 1209 * 1210 * @return true if modal exclusion is supported by the toolkit, false otherwise 1211 * 1212 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1213 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1214 * 1215 * @since 1.5 1216 */ 1217 public static boolean isModalExcludedSupported() 1218 { 1219 Toolkit tk = Toolkit.getDefaultToolkit(); 1220 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1221 } 1222 /* 1223 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1224 * 1225 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1226 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1227 * 1228 * @since 1.5 1229 */ 1230 protected boolean isModalExcludedSupportedImpl() 1231 { 1232 return false; 1233 } 1234 1235 /* 1236 * Sets this window to be excluded from being modally blocked. When the 1237 * toolkit supports modal exclusion and this method is called, input 1238 * events, focus transfer and z-order will continue to work for the 1239 * window, it's owned windows and child components, even in the 1240 * presence of a modal dialog. 1241 * For details on which {@code Window}s are normally blocked 1242 * by modal dialog, see {@link java.awt.Dialog}. 1243 * Invoking this method when the modal exclusion API is not supported by 1244 * the current toolkit has no effect. 1245 * @param window Window to be marked as not modally blocked 1246 * @see java.awt.Dialog 1247 * @see java.awt.Dialog#setModal(boolean) 1248 * @see sun.awt.SunToolkit#isModalExcludedSupported 1249 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1250 */ 1251 public static void setModalExcluded(Window window) 1252 { 1253 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1254 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1255 } 1256 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1257 } 1258 1259 /* 1260 * Returns whether the specified window is blocked by modal dialogs. 1261 * If the modal exclusion API isn't supported by the current toolkit, 1262 * it returns false for all windows. 1263 * 1264 * @param window Window to test for modal exclusion 1265 * 1266 * @return true if the window is modal excluded, false otherwise. If 1267 * the modal exclusion isn't supported by the current Toolkit, false 1268 * is returned 1269 * 1270 * @see sun.awt.SunToolkit#isModalExcludedSupported 1271 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1272 * 1273 * @since 1.5 1274 */ 1275 public static boolean isModalExcluded(Window window) 1276 { 1277 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1278 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1279 } 1280 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1281 } 1282 1283 /** 1284 * Overridden in XToolkit and WToolkit 1285 */ 1286 @Override 1287 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1288 return (modalityType == Dialog.ModalityType.MODELESS) || 1289 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1290 } 1291 1292 /** 1293 * Overridden in XToolkit and WToolkit 1294 */ 1295 @Override 1296 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1297 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1298 } 1299 1300 /////////////////////////////////////////////////////////////////////////// 1301 // 1302 // The following is used by the Java Plug-in to coordinate dialog modality 1303 // between containing applications (browsers, ActiveX containers etc) and 1304 // the AWT. 1305 // 1306 /////////////////////////////////////////////////////////////////////////// 1307 1308 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1309 1310 public void addModalityListener(ModalityListener listener) { 1311 modalityListeners.add(listener); 1312 } 1313 1314 public void removeModalityListener(ModalityListener listener) { 1315 modalityListeners.remove(listener); 1316 } 1317 1318 public void notifyModalityPushed(Dialog dialog) { 1319 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1320 } 1321 1322 public void notifyModalityPopped(Dialog dialog) { 1323 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1324 } 1325 1326 final void notifyModalityChange(int id, Dialog source) { 1327 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1328 ev.dispatch(); 1329 } 1330 1331 static class ModalityListenerList implements ModalityListener { 1332 1333 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1334 1335 void add(ModalityListener listener) { 1336 listeners.addElement(listener); 1337 } 1338 1339 void remove(ModalityListener listener) { 1340 listeners.removeElement(listener); 1341 } 1342 1343 @Override 1344 public void modalityPushed(ModalityEvent ev) { 1345 Iterator<ModalityListener> it = listeners.iterator(); 1346 while (it.hasNext()) { 1347 it.next().modalityPushed(ev); 1348 } 1349 } 1350 1351 @Override 1352 public void modalityPopped(ModalityEvent ev) { 1353 Iterator<ModalityListener> it = listeners.iterator(); 1354 while (it.hasNext()) { 1355 it.next().modalityPopped(ev); 1356 } 1357 } 1358 } // end of class ModalityListenerList 1359 1360 /////////////////////////////////////////////////////////////////////////// 1361 // End Plug-in code 1362 /////////////////////////////////////////////////////////////////////////// 1363 1364 public static boolean isLightweightOrUnknown(Component comp) { 1365 if (comp.isLightweight() 1366 || !(getDefaultToolkit() instanceof SunToolkit)) 1367 { 1368 return true; 1369 } 1370 return !(comp instanceof Button 1371 || comp instanceof Canvas 1372 || comp instanceof Checkbox 1373 || comp instanceof Choice 1374 || comp instanceof Label 1375 || comp instanceof java.awt.List 1376 || comp instanceof Panel 1377 || comp instanceof Scrollbar 1378 || comp instanceof ScrollPane 1379 || comp instanceof TextArea 1380 || comp instanceof TextField 1381 || comp instanceof Window); 1382 } 1383 1384 @SuppressWarnings("serial") 1385 public static class OperationTimedOut extends RuntimeException { 1386 public OperationTimedOut(String msg) { 1387 super(msg); 1388 } 1389 public OperationTimedOut() { 1390 } 1391 } 1392 1393 @SuppressWarnings("serial") 1394 public static class InfiniteLoop extends RuntimeException { 1395 } 1396 1397 @SuppressWarnings("serial") 1398 public static class IllegalThreadException extends RuntimeException { 1399 public IllegalThreadException(String msg) { 1400 super(msg); 1401 } 1402 public IllegalThreadException() { 1403 } 1404 } 1405 1406 public static final int DEFAULT_WAIT_TIME = 10000; 1407 private static final int MAX_ITERS = 20; 1408 private static final int MIN_ITERS = 0; 1409 private static final int MINIMAL_EDELAY = 0; 1410 1411 /** 1412 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1413 */ 1414 public void realSync() throws OperationTimedOut, InfiniteLoop { 1415 realSync(DEFAULT_WAIT_TIME); 1416 } 1417 1418 /** 1419 * Forces toolkit to synchronize with the native windowing 1420 * sub-system, flushing all pending work and waiting for all the 1421 * events to be processed. This method guarantees that after 1422 * return no additional Java events will be generated, unless 1423 * cause by user. Obviously, the method cannot be used on the 1424 * event dispatch thread (EDT). In case it nevertheless gets 1425 * invoked on this thread, the method throws the 1426 * IllegalThreadException runtime exception. 1427 * 1428 * <p> This method allows to write tests without explicit timeouts 1429 * or wait for some event. Example: 1430 * <pre>{@code 1431 * Frame f = ...; 1432 * f.setVisible(true); 1433 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1434 * }</pre> 1435 * 1436 * <p> After realSync, {@code f} will be completely visible 1437 * on the screen, its getLocationOnScreen will be returning the 1438 * right result and it will be the focus owner. 1439 * 1440 * <p> Another example: 1441 * <pre>{@code 1442 * b.requestFocus(); 1443 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1444 * }</pre> 1445 * 1446 * <p> After realSync, {@code b} will be focus owner. 1447 * 1448 * <p> Notice that realSync isn't guaranteed to work if recurring 1449 * actions occur, such as if during processing of some event 1450 * another request which may generate some events occurs. By 1451 * default, sync tries to perform as much as {@value #MAX_ITERS} 1452 * cycles of event processing, allowing for roughly {@value 1453 * #MAX_ITERS} additional requests. 1454 * 1455 * <p> For example, requestFocus() generates native request, which 1456 * generates one or two Java focus events, which then generate a 1457 * serie of paint events, a serie of Java focus events, which then 1458 * generate a serie of paint events which then are processed - 1459 * three cycles, minimum. 1460 * 1461 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1462 */ 1463 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1464 { 1465 if (EventQueue.isDispatchThread()) { 1466 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1467 } 1468 int bigLoop = 0; 1469 do { 1470 // Let's do sync first 1471 sync(); 1472 1473 // During the wait process, when we were processing incoming 1474 // events, we could have made some new request, which can 1475 // generate new events. Example: MapNotify/XSetInputFocus. 1476 // Therefore, we dispatch them as long as there is something 1477 // to dispatch. 1478 int iters = 0; 1479 while (iters < MIN_ITERS) { 1480 syncNativeQueue(timeout); 1481 iters++; 1482 } 1483 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1484 iters++; 1485 } 1486 if (iters >= MAX_ITERS) { 1487 throw new InfiniteLoop(); 1488 } 1489 1490 // native requests were dispatched by X/Window Manager or Windows 1491 // Moreover, we processed them all on Toolkit thread 1492 // Now wait while EDT processes them. 1493 // 1494 // During processing of some events (focus, for example), 1495 // some other events could have been generated. So, after 1496 // waitForIdle, we may end up with full EventQueue 1497 iters = 0; 1498 while (iters < MIN_ITERS) { 1499 waitForIdle(timeout); 1500 iters++; 1501 } 1502 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1503 iters++; 1504 } 1505 if (iters >= MAX_ITERS) { 1506 throw new InfiniteLoop(); 1507 } 1508 1509 bigLoop++; 1510 // Again, for Java events, it was simple to check for new Java 1511 // events by checking event queue, but what if Java events 1512 // resulted in native requests? Therefor, check native events again. 1513 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1514 } 1515 1516 /** 1517 * Platform toolkits need to implement this method to perform the 1518 * sync of the native queue. The method should wait until native 1519 * requests are processed, all native events are processed and 1520 * corresponding Java events are generated. Should return 1521 * {@code true} if some events were processed, 1522 * {@code false} otherwise. 1523 */ 1524 protected abstract boolean syncNativeQueue(final long timeout); 1525 1526 private boolean eventDispatched = false; 1527 private boolean queueEmpty = false; 1528 private final Object waitLock = "Wait Lock"; 1529 1530 private boolean isEQEmpty() { 1531 EventQueue queue = getSystemEventQueueImpl(); 1532 return AWTAccessor.getEventQueueAccessor().noEvents(queue); 1533 } 1534 1535 /** 1536 * Waits for the Java event queue to empty. Ensures that all 1537 * events are processed (including paint events), and that if 1538 * recursive events were generated, they are also processed. 1539 * Should return {@code true} if more processing is 1540 * necessary, {@code false} otherwise. 1541 */ 1542 @SuppressWarnings("serial") 1543 protected final boolean waitForIdle(final long timeout) { 1544 flushPendingEvents(); 1545 boolean queueWasEmpty = isEQEmpty(); 1546 queueEmpty = false; 1547 eventDispatched = false; 1548 synchronized(waitLock) { 1549 postEvent(AppContext.getAppContext(), 1550 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1551 @Override 1552 public void dispatch() { 1553 // Here we block EDT. It could have some 1554 // events, it should have dispatched them by 1555 // now. So native requests could have been 1556 // generated. First, dispatch them. Then, 1557 // flush Java events again. 1558 int iters = 0; 1559 while (iters < MIN_ITERS) { 1560 syncNativeQueue(timeout); 1561 iters++; 1562 } 1563 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1564 iters++; 1565 } 1566 flushPendingEvents(); 1567 1568 synchronized(waitLock) { 1569 queueEmpty = isEQEmpty(); 1570 eventDispatched = true; 1571 waitLock.notifyAll(); 1572 } 1573 } 1574 }); 1575 try { 1576 while (!eventDispatched) { 1577 waitLock.wait(); 1578 } 1579 } catch (InterruptedException ie) { 1580 return false; 1581 } 1582 } 1583 1584 try { 1585 Thread.sleep(MINIMAL_EDELAY); 1586 } catch (InterruptedException ie) { 1587 throw new RuntimeException("Interrupted"); 1588 } 1589 1590 flushPendingEvents(); 1591 1592 // Lock to force write-cache flush for queueEmpty. 1593 synchronized (waitLock) { 1594 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1595 } 1596 } 1597 1598 /** 1599 * Grabs the mouse input for the given window. The window must be 1600 * visible. The window or its children do not receive any 1601 * additional mouse events besides those targeted to them. All 1602 * other events will be dispatched as before - to the respective 1603 * targets. This Window will receive UngrabEvent when automatic 1604 * ungrab is about to happen. The event can be listened to by 1605 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1606 * UngrabEvent class for the list of conditions when ungrab is 1607 * about to happen. 1608 * @see UngrabEvent 1609 */ 1610 public abstract void grab(Window w); 1611 1612 /** 1613 * Forces ungrab. No event will be sent. 1614 */ 1615 public abstract void ungrab(Window w); 1616 1617 1618 /** 1619 * Locates the splash screen library in a platform dependent way and closes 1620 * the splash screen. Should be invoked on first top-level frame display. 1621 * @see java.awt.SplashScreen 1622 * @since 1.6 1623 */ 1624 public static native void closeSplashScreen(); 1625 1626 /* The following methods and variables are to support retrieving 1627 * desktop text anti-aliasing settings 1628 */ 1629 1630 /* Need an instance method because setDesktopProperty(..) is protected. */ 1631 private void fireDesktopFontPropertyChanges() { 1632 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1633 SunToolkit.getDesktopFontHints()); 1634 } 1635 1636 private static boolean checkedSystemAAFontSettings; 1637 private static boolean useSystemAAFontSettings; 1638 private static boolean lastExtraCondition = true; 1639 private static RenderingHints desktopFontHints; 1640 1641 /* Since Swing is the reason for this "extra condition" logic its 1642 * worth documenting it in some detail. 1643 * First, a goal is for Swing and applications to both retrieve and 1644 * use the same desktop property value so that there is complete 1645 * consistency between the settings used by JDK's Swing implementation 1646 * and 3rd party custom Swing components, custom L&Fs and any general 1647 * text rendering that wants to be consistent with these. 1648 * But by default on Solaris & Linux Swing will not use AA text over 1649 * remote X11 display (unless Xrender can be used which is TBD and may not 1650 * always be available anyway) as that is a noticeable performance hit. 1651 * So there needs to be a way to express that extra condition so that 1652 * it is seen by all clients of the desktop property API. 1653 * If this were the only condition it could be handled here as it would 1654 * be the same for any L&F and could reasonably be considered to be 1655 * a static behaviour of those systems. 1656 * But GTK currently has an additional test based on locale which is 1657 * not applied by Metal. So mixing GTK in a few locales with Metal 1658 * would mean the last one wins. 1659 * This could be stored per-app context which would work 1660 * for different applets, but wouldn't help for a single application 1661 * using GTK and some other L&F concurrently. 1662 * But it is expected this will be addressed within GTK and the font 1663 * system so is a temporary and somewhat unlikely harmless corner case. 1664 */ 1665 public static void setAAFontSettingsCondition(boolean extraCondition) { 1666 if (extraCondition != lastExtraCondition) { 1667 lastExtraCondition = extraCondition; 1668 if (checkedSystemAAFontSettings) { 1669 /* Someone already asked for this info, under a different 1670 * condition. 1671 * We'll force re-evaluation instead of replicating the 1672 * logic, then notify any listeners of any change. 1673 */ 1674 checkedSystemAAFontSettings = false; 1675 Toolkit tk = Toolkit.getDefaultToolkit(); 1676 if (tk instanceof SunToolkit) { 1677 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1678 } 1679 } 1680 } 1681 } 1682 1683 /* "false", "off", ""default" aren't explicitly tested, they 1684 * just fall through to produce a null return which all are equated to 1685 * "false". 1686 */ 1687 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1688 Object aaHint = null; 1689 hintname = hintname.toLowerCase(Locale.ENGLISH); 1690 if (hintname.equals("on")) { 1691 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1692 } else if (hintname.equals("gasp")) { 1693 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1694 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1695 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1696 } else if (hintname.equals("lcd_hbgr")) { 1697 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1698 } else if (hintname.equals("lcd_vrgb")) { 1699 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1700 } else if (hintname.equals("lcd_vbgr")) { 1701 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1702 } 1703 if (aaHint != null) { 1704 RenderingHints map = new RenderingHints(null); 1705 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1706 return map; 1707 } else { 1708 return null; 1709 } 1710 } 1711 1712 /* This method determines whether to use the system font settings, 1713 * or ignore them if a L&F has specified they should be ignored, or 1714 * to override both of these with a system property specified value. 1715 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1716 * system property isn't applied as desktop properties are considered 1717 * to be inapplicable in that case. In that headless case although 1718 * this method will return "true" the toolkit will return a null map. 1719 */ 1720 private static boolean useSystemAAFontSettings() { 1721 if (!checkedSystemAAFontSettings) { 1722 useSystemAAFontSettings = true; /* initially set this true */ 1723 String systemAAFonts = null; 1724 Toolkit tk = Toolkit.getDefaultToolkit(); 1725 if (tk instanceof SunToolkit) { 1726 systemAAFonts = 1727 AccessController.doPrivileged( 1728 new GetPropertyAction("awt.useSystemAAFontSettings")); 1729 } 1730 if (systemAAFonts != null) { 1731 useSystemAAFontSettings = 1732 Boolean.valueOf(systemAAFonts).booleanValue(); 1733 /* If it is anything other than "true", then it may be 1734 * a hint name , or it may be "off, "default", etc. 1735 */ 1736 if (!useSystemAAFontSettings) { 1737 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1738 } 1739 } 1740 /* If its still true, apply the extra condition */ 1741 if (useSystemAAFontSettings) { 1742 useSystemAAFontSettings = lastExtraCondition; 1743 } 1744 checkedSystemAAFontSettings = true; 1745 } 1746 return useSystemAAFontSettings; 1747 } 1748 1749 /* A variable defined for the convenience of JDK code */ 1750 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1751 1752 /* Overridden by subclasses to return platform/desktop specific values */ 1753 protected RenderingHints getDesktopAAHints() { 1754 return null; 1755 } 1756 1757 /* Subclass desktop property loading methods call this which 1758 * in turn calls the appropriate subclass implementation of 1759 * getDesktopAAHints() when system settings are being used. 1760 * Its public rather than protected because subclasses may delegate 1761 * to a helper class. 1762 */ 1763 public static RenderingHints getDesktopFontHints() { 1764 if (useSystemAAFontSettings()) { 1765 Toolkit tk = Toolkit.getDefaultToolkit(); 1766 if (tk instanceof SunToolkit) { 1767 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1768 return (RenderingHints)map; 1769 } else { /* Headless Toolkit */ 1770 return null; 1771 } 1772 } else if (desktopFontHints != null) { 1773 /* cloning not necessary as the return value is cloned later, but 1774 * its harmless. 1775 */ 1776 return (RenderingHints)(desktopFontHints.clone()); 1777 } else { 1778 return null; 1779 } 1780 } 1781 1782 1783 public abstract boolean isDesktopSupported(); 1784 public abstract boolean isTaskbarSupported(); 1785 1786 /* 1787 * consumeNextKeyTyped() method is not currently used, 1788 * however Swing could use it in the future. 1789 */ 1790 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1791 try { 1792 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped( 1793 (DefaultKeyboardFocusManager)KeyboardFocusManager. 1794 getCurrentKeyboardFocusManager(), 1795 keyEvent); 1796 } catch (ClassCastException cce) { 1797 cce.printStackTrace(); 1798 } 1799 } 1800 1801 protected static void dumpPeers(final PlatformLogger aLog) { 1802 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1803 } 1804 1805 /** 1806 * Returns the {@code Window} ancestor of the component {@code comp}. 1807 * @return Window ancestor of the component or component by itself if it is Window; 1808 * null, if component is not a part of window hierarchy 1809 */ 1810 public static Window getContainingWindow(Component comp) { 1811 while (comp != null && !(comp instanceof Window)) { 1812 comp = comp.getParent(); 1813 } 1814 return (Window)comp; 1815 } 1816 1817 private static Boolean sunAwtDisableMixing = null; 1818 1819 /** 1820 * Returns the value of "sun.awt.disableMixing" property. Default 1821 * value is {@code false}. 1822 */ 1823 public static synchronized boolean getSunAwtDisableMixing() { 1824 if (sunAwtDisableMixing == null) { 1825 sunAwtDisableMixing = AccessController.doPrivileged( 1826 new GetBooleanAction("sun.awt.disableMixing")); 1827 } 1828 return sunAwtDisableMixing.booleanValue(); 1829 } 1830 1831 /** 1832 * Returns true if the native GTK libraries are available. The 1833 * default implementation returns false, but UNIXToolkit overrides this 1834 * method to provide a more specific answer. 1835 */ 1836 public boolean isNativeGTKAvailable() { 1837 return false; 1838 } 1839 1840 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object(); 1841 1842 public synchronized void setWindowDeactivationTime(Window w, long time) { 1843 AppContext ctx = getAppContext(w); 1844 if (ctx == null) { 1845 return; 1846 } 1847 @SuppressWarnings("unchecked") 1848 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1849 if (map == null) { 1850 map = new WeakHashMap<Window, Long>(); 1851 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map); 1852 } 1853 map.put(w, time); 1854 } 1855 1856 public synchronized long getWindowDeactivationTime(Window w) { 1857 AppContext ctx = getAppContext(w); 1858 if (ctx == null) { 1859 return -1; 1860 } 1861 @SuppressWarnings("unchecked") 1862 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1863 if (map == null) { 1864 return -1; 1865 } 1866 Long time = map.get(w); 1867 return time == null ? -1 : time; 1868 } 1869 1870 // Cosntant alpha 1871 public boolean isWindowOpacitySupported() { 1872 return false; 1873 } 1874 1875 // Shaping 1876 public boolean isWindowShapingSupported() { 1877 return false; 1878 } 1879 1880 // Per-pixel alpha 1881 public boolean isWindowTranslucencySupported() { 1882 return false; 1883 } 1884 1885 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1886 return false; 1887 } 1888 1889 /** 1890 * Returns true if swing backbuffer should be translucent. 1891 */ 1892 public boolean isSwingBackbufferTranslucencySupported() { 1893 return false; 1894 } 1895 1896 /** 1897 * Returns whether or not a containing top level window for the passed 1898 * component is 1899 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1900 * 1901 * @param c a Component which toplevel's to check 1902 * @return {@code true} if the passed component is not null and has a 1903 * containing toplevel window which is opaque (so per-pixel translucency 1904 * is not enabled), {@code false} otherwise 1905 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 1906 */ 1907 public static boolean isContainingTopLevelOpaque(Component c) { 1908 Window w = getContainingWindow(c); 1909 return w != null && w.isOpaque(); 1910 } 1911 1912 /** 1913 * Returns whether or not a containing top level window for the passed 1914 * component is 1915 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 1916 * 1917 * @param c a Component which toplevel's to check 1918 * @return {@code true} if the passed component is not null and has a 1919 * containing toplevel window which has opacity less than 1920 * 1.0f (which means that it is translucent), {@code false} otherwise 1921 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 1922 */ 1923 public static boolean isContainingTopLevelTranslucent(Component c) { 1924 Window w = getContainingWindow(c); 1925 return w != null && w.getOpacity() < 1.0f; 1926 } 1927 1928 /** 1929 * Returns whether the native system requires using the peer.updateWindow() 1930 * method to update the contents of a non-opaque window, or if usual 1931 * painting procedures are sufficient. The default return value covers 1932 * the X11 systems. On MS Windows this method is overriden in WToolkit 1933 * to return true. 1934 */ 1935 public boolean needUpdateWindow() { 1936 return false; 1937 } 1938 1939 /** 1940 * Descendants of the SunToolkit should override and put their own logic here. 1941 */ 1942 public int getNumberOfButtons(){ 1943 return 3; 1944 } 1945 1946 /** 1947 * Checks that the given object implements/extends the given 1948 * interface/class. 1949 * 1950 * Note that using the instanceof operator causes a class to be loaded. 1951 * Using this method doesn't load a class and it can be used instead of 1952 * the instanceof operator for performance reasons. 1953 * 1954 * @param obj Object to be checked 1955 * @param type The name of the interface/class. Must be 1956 * fully-qualified interface/class name. 1957 * @return true, if this object implements/extends the given 1958 * interface/class, false, otherwise, or if obj or type is null 1959 */ 1960 public static boolean isInstanceOf(Object obj, String type) { 1961 if (obj == null) return false; 1962 if (type == null) return false; 1963 1964 return isInstanceOf(obj.getClass(), type); 1965 } 1966 1967 private static boolean isInstanceOf(Class<?> cls, String type) { 1968 if (cls == null) return false; 1969 1970 if (cls.getName().equals(type)) { 1971 return true; 1972 } 1973 1974 for (Class<?> c : cls.getInterfaces()) { 1975 if (c.getName().equals(type)) { 1976 return true; 1977 } 1978 } 1979 return isInstanceOf(cls.getSuperclass(), type); 1980 } 1981 1982 protected static LightweightFrame getLightweightFrame(Component c) { 1983 for (; c != null; c = c.getParent()) { 1984 if (c instanceof LightweightFrame) { 1985 return (LightweightFrame)c; 1986 } 1987 if (c instanceof Window) { 1988 // Don't traverse owner windows 1989 return null; 1990 } 1991 } 1992 return null; 1993 } 1994 1995 /////////////////////////////////////////////////////////////////////////// 1996 // 1997 // The following methods help set and identify whether a particular 1998 // AWTEvent object was produced by the system or by user code. As of this 1999 // writing the only consumer is the Java Plug-In, although this information 2000 // could be useful to more clients and probably should be formalized in 2001 // the public API. 2002 // 2003 /////////////////////////////////////////////////////////////////////////// 2004 2005 public static void setSystemGenerated(AWTEvent e) { 2006 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2007 } 2008 2009 public static boolean isSystemGenerated(AWTEvent e) { 2010 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2011 } 2012 2013 } // class SunToolkit 2014 2015 2016 /* 2017 * PostEventQueue is a Thread that runs in the same AppContext as the 2018 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2019 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2020 * events to this queue, which then calls EventQueue.postEvent(). 2021 * 2022 * We do this because EventQueue.postEvent() may be overridden by client 2023 * code, and we mustn't ever call client code from the toolkit thread. 2024 */ 2025 class PostEventQueue { 2026 private EventQueueItem queueHead = null; 2027 private EventQueueItem queueTail = null; 2028 private final EventQueue eventQueue; 2029 2030 private Thread flushThread = null; 2031 2032 PostEventQueue(EventQueue eq) { 2033 eventQueue = eq; 2034 } 2035 2036 /* 2037 * Continually post pending AWTEvents to the Java EventQueue. The method 2038 * is synchronized to ensure the flush is completed before a new event 2039 * can be posted to this queue. 2040 * 2041 * 7177040: The method couldn't be wholly synchronized because of calls 2042 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could 2043 * potentially lead to deadlock 2044 */ 2045 public void flush() { 2046 2047 Thread newThread = Thread.currentThread(); 2048 2049 try { 2050 EventQueueItem tempQueue; 2051 synchronized (this) { 2052 // Avoid method recursion 2053 if (newThread == flushThread) { 2054 return; 2055 } 2056 // Wait for other threads' flushing 2057 while (flushThread != null) { 2058 wait(); 2059 } 2060 // Skip everything if queue is empty 2061 if (queueHead == null) { 2062 return; 2063 } 2064 // Remember flushing thread 2065 flushThread = newThread; 2066 2067 tempQueue = queueHead; 2068 queueHead = queueTail = null; 2069 } 2070 try { 2071 while (tempQueue != null) { 2072 eventQueue.postEvent(tempQueue.event); 2073 tempQueue = tempQueue.next; 2074 } 2075 } 2076 finally { 2077 // Only the flushing thread can get here 2078 synchronized (this) { 2079 // Forget flushing thread, inform other pending threads 2080 flushThread = null; 2081 notifyAll(); 2082 } 2083 } 2084 } 2085 catch (InterruptedException e) { 2086 // Couldn't allow exception go up, so at least recover the flag 2087 newThread.interrupt(); 2088 } 2089 } 2090 2091 /* 2092 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2093 */ 2094 void postEvent(AWTEvent event) { 2095 EventQueueItem item = new EventQueueItem(event); 2096 2097 synchronized (this) { 2098 if (queueHead == null) { 2099 queueHead = queueTail = item; 2100 } else { 2101 queueTail.next = item; 2102 queueTail = item; 2103 } 2104 } 2105 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2106 } 2107 } // class PostEventQueue