1 /* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.awt; 27 28 import java.awt.*; 29 import static java.awt.RenderingHints.*; 30 import java.awt.dnd.*; 31 import java.awt.dnd.peer.DragSourceContextPeer; 32 import java.awt.peer.*; 33 import java.awt.event.WindowEvent; 34 import java.awt.event.KeyEvent; 35 import java.awt.image.*; 36 import java.awt.TrayIcon; 37 import java.awt.SystemTray; 38 import java.awt.event.InputEvent; 39 import java.io.File; 40 import java.io.IOException; 41 import java.io.InputStream; 42 import java.net.URL; 43 import java.security.PrivilegedAction; 44 import java.util.*; 45 import java.util.concurrent.TimeUnit; 46 import java.util.concurrent.locks.Condition; 47 import java.util.concurrent.locks.Lock; 48 import java.util.concurrent.locks.ReentrantLock; 49 50 import sun.awt.datatransfer.DataTransferer; 51 import sun.util.logging.PlatformLogger; 52 import sun.misc.SoftCache; 53 import sun.font.FontDesignMetrics; 54 import sun.awt.im.InputContext; 55 import sun.awt.image.*; 56 import sun.security.action.GetPropertyAction; 57 import sun.security.action.GetBooleanAction; 58 import java.lang.reflect.InvocationTargetException; 59 import java.security.AccessController; 60 61 public abstract class SunToolkit extends Toolkit 62 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 63 64 // 8014718: logging has been removed from SunToolkit 65 66 /* Load debug settings for native code */ 67 static { 68 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) { 69 DebugSettings.init(); 70 } 71 }; 72 73 /** 74 * Special mask for the UngrabEvent events, in addition to the 75 * public masks defined in AWTEvent. Should be used as the mask 76 * value for Toolkit.addAWTEventListener. 77 */ 78 public static final int GRAB_EVENT_MASK = 0x80000000; 79 80 /* The key to put()/get() the PostEventQueue into/from the AppContext. 81 */ 82 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 83 84 /** 85 * Number of buttons. 86 * By default it's taken from the system. If system value does not 87 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 88 */ 89 protected static int numberOfButtons = 0; 90 91 92 /* XFree standard mention 24 buttons as maximum: 93 * http://www.xfree86.org/current/mouse.4.html 94 * We workaround systems supporting more than 24 buttons. 95 * Otherwise, we have to use long type values as masks 96 * which leads to API change. 97 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 98 * the 4-bytes limit for the int type. (CR 6799099) 99 * One more bit is reserved for FIRST_HIGH_BIT. 100 */ 101 public final static int MAX_BUTTONS_SUPPORTED = 20; 102 103 /** 104 * Creates and initializes EventQueue instance for the specified 105 * AppContext. 106 * Note that event queue must be created from createNewAppContext() 107 * only in order to ensure that EventQueue constructor obtains 108 * the correct AppContext. 109 * @param appContext AppContext to associate with the event queue 110 */ 111 private static void initEQ(AppContext appContext) { 112 EventQueue eventQueue; 113 114 String eqName = System.getProperty("AWT.EventQueueClass", 115 "java.awt.EventQueue"); 116 117 try { 118 eventQueue = (EventQueue)Class.forName(eqName).newInstance(); 119 } catch (Exception e) { 120 e.printStackTrace(); 121 System.err.println("Failed loading " + eqName + ": " + e); 122 eventQueue = new EventQueue(); 123 } 124 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 125 126 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 127 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 128 } 129 130 public SunToolkit() { 131 } 132 133 public boolean useBufferPerWindow() { 134 return false; 135 } 136 137 public abstract WindowPeer createWindow(Window target) 138 throws HeadlessException; 139 140 public abstract FramePeer createFrame(Frame target) 141 throws HeadlessException; 142 143 public abstract FramePeer createLightweightFrame(LightweightFrame target) 144 throws HeadlessException; 145 146 public abstract DialogPeer createDialog(Dialog target) 147 throws HeadlessException; 148 149 public abstract ButtonPeer createButton(Button target) 150 throws HeadlessException; 151 152 public abstract TextFieldPeer createTextField(TextField target) 153 throws HeadlessException; 154 155 public abstract ChoicePeer createChoice(Choice target) 156 throws HeadlessException; 157 158 public abstract LabelPeer createLabel(Label target) 159 throws HeadlessException; 160 161 public abstract ListPeer createList(java.awt.List target) 162 throws HeadlessException; 163 164 public abstract CheckboxPeer createCheckbox(Checkbox target) 165 throws HeadlessException; 166 167 public abstract ScrollbarPeer createScrollbar(Scrollbar target) 168 throws HeadlessException; 169 170 public abstract ScrollPanePeer createScrollPane(ScrollPane target) 171 throws HeadlessException; 172 173 public abstract TextAreaPeer createTextArea(TextArea target) 174 throws HeadlessException; 175 176 public abstract FileDialogPeer createFileDialog(FileDialog target) 177 throws HeadlessException; 178 179 public abstract MenuBarPeer createMenuBar(MenuBar target) 180 throws HeadlessException; 181 182 public abstract MenuPeer createMenu(Menu target) 183 throws HeadlessException; 184 185 public abstract PopupMenuPeer createPopupMenu(PopupMenu target) 186 throws HeadlessException; 187 188 public abstract MenuItemPeer createMenuItem(MenuItem target) 189 throws HeadlessException; 190 191 public abstract CheckboxMenuItemPeer createCheckboxMenuItem( 192 CheckboxMenuItem target) 193 throws HeadlessException; 194 195 public abstract DragSourceContextPeer createDragSourceContextPeer( 196 DragGestureEvent dge) 197 throws InvalidDnDOperationException; 198 199 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 200 throws HeadlessException, AWTException; 201 202 public abstract SystemTrayPeer createSystemTray(SystemTray target); 203 204 public abstract boolean isTraySupported(); 205 206 @SuppressWarnings("deprecation") 207 public abstract FontPeer getFontPeer(String name, int style); 208 209 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen) 210 throws AWTException; 211 212 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer() 213 throws HeadlessException; 214 215 /** 216 * The AWT lock is typically only used on Unix platforms to synchronize 217 * access to Xlib, OpenGL, etc. However, these methods are implemented 218 * in SunToolkit so that they can be called from shared code (e.g. 219 * from the OGL pipeline) or from the X11 pipeline regardless of whether 220 * XToolkit or MToolkit is currently in use. There are native macros 221 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 222 * methods is changed, make sure it is compatible with the native macros. 223 * 224 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 225 * used in place of: 226 * synchronized (getAWTLock()) { 227 * ... 228 * } 229 * 230 * By factoring these methods out specially, we are able to change the 231 * implementation of these methods (e.g. use more advanced locking 232 * mechanisms) without impacting calling code. 233 * 234 * Sample usage: 235 * private void doStuffWithXlib() { 236 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 237 * SunToolkit.awtLock(); 238 * try { 239 * ... 240 * XlibWrapper.XDoStuff(); 241 * } finally { 242 * SunToolkit.awtUnlock(); 243 * } 244 * } 245 */ 246 247 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 248 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 249 250 public static final void awtLock() { 251 AWT_LOCK.lock(); 252 } 253 254 public static final boolean awtTryLock() { 255 return AWT_LOCK.tryLock(); 256 } 257 258 public static final void awtUnlock() { 259 AWT_LOCK.unlock(); 260 } 261 262 public static final void awtLockWait() 263 throws InterruptedException 264 { 265 AWT_LOCK_COND.await(); 266 } 267 268 public static final void awtLockWait(long timeout) 269 throws InterruptedException 270 { 271 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 272 } 273 274 public static final void awtLockNotify() { 275 AWT_LOCK_COND.signal(); 276 } 277 278 public static final void awtLockNotifyAll() { 279 AWT_LOCK_COND.signalAll(); 280 } 281 282 public static final boolean isAWTLockHeldByCurrentThread() { 283 return AWT_LOCK.isHeldByCurrentThread(); 284 } 285 286 /* 287 * Create a new AppContext, along with its EventQueue, for a 288 * new ThreadGroup. Browser code, for example, would use this 289 * method to create an AppContext & EventQueue for an Applet. 290 */ 291 public static AppContext createNewAppContext() { 292 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 293 return createNewAppContext(threadGroup); 294 } 295 296 static final AppContext createNewAppContext(ThreadGroup threadGroup) { 297 // Create appContext before initialization of EventQueue, so all 298 // the calls to AppContext.getAppContext() from EventQueue ctor 299 // return correct values 300 AppContext appContext = new AppContext(threadGroup); 301 initEQ(appContext); 302 303 return appContext; 304 } 305 306 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 307 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown); 308 } 309 310 /* 311 * Fetch the peer associated with the given target (as specified 312 * in the peer creation method). This can be used to determine 313 * things like what the parent peer is. If the target is null 314 * or the target can't be found (either because the a peer was 315 * never created for it or the peer was disposed), a null will 316 * be returned. 317 */ 318 protected static Object targetToPeer(Object target) { 319 if (target != null && !GraphicsEnvironment.isHeadless()) { 320 return AWTAutoShutdown.getInstance().getPeer(target); 321 } 322 return null; 323 } 324 325 protected static void targetCreatedPeer(Object target, Object peer) { 326 if (target != null && peer != null && 327 !GraphicsEnvironment.isHeadless()) 328 { 329 AWTAutoShutdown.getInstance().registerPeer(target, peer); 330 } 331 } 332 333 protected static void targetDisposedPeer(Object target, Object peer) { 334 if (target != null && peer != null && 335 !GraphicsEnvironment.isHeadless()) 336 { 337 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 338 } 339 } 340 341 // Maps from non-Component/MenuComponent to AppContext. 342 // WeakHashMap<Component,AppContext> 343 private static final Map<Object, AppContext> appContextMap = 344 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>()); 345 346 /** 347 * Sets the appContext field of target. If target is not a Component or 348 * MenuComponent, this returns false. 349 */ 350 private static boolean setAppContext(Object target, 351 AppContext context) { 352 if (target instanceof Component) { 353 AWTAccessor.getComponentAccessor(). 354 setAppContext((Component)target, context); 355 } else if (target instanceof MenuComponent) { 356 AWTAccessor.getMenuComponentAccessor(). 357 setAppContext((MenuComponent)target, context); 358 } else { 359 return false; 360 } 361 return true; 362 } 363 364 /** 365 * Returns the appContext field for target. If target is not a 366 * Component or MenuComponent this returns null. 367 */ 368 private static AppContext getAppContext(Object target) { 369 if (target instanceof Component) { 370 return AWTAccessor.getComponentAccessor(). 371 getAppContext((Component)target); 372 } else if (target instanceof MenuComponent) { 373 return AWTAccessor.getMenuComponentAccessor(). 374 getAppContext((MenuComponent)target); 375 } else { 376 return null; 377 } 378 } 379 380 /* 381 * Fetch the AppContext associated with the given target. 382 * This can be used to determine things like which EventQueue 383 * to use for posting events to a Component. If the target is 384 * null or the target can't be found, a null with be returned. 385 */ 386 public static AppContext targetToAppContext(Object target) { 387 if (target == null) { 388 return null; 389 } 390 AppContext context = getAppContext(target); 391 if (context == null) { 392 // target is not a Component/MenuComponent, try the 393 // appContextMap. 394 context = appContextMap.get(target); 395 } 396 return context; 397 } 398 399 /** 400 * Sets the synchronous status of focus requests on lightweight 401 * components in the specified window to the specified value. 402 * If the boolean parameter is <code>true</code> then the focus 403 * requests on lightweight components will be performed 404 * synchronously, if it is <code>false</code>, then asynchronously. 405 * By default, all windows have their lightweight request status 406 * set to asynchronous. 407 * <p> 408 * The application can only set the status of lightweight focus 409 * requests to synchronous for any of its windows if it doesn't 410 * perform focus transfers between different heavyweight containers. 411 * In this case the observable focus behaviour is the same as with 412 * asynchronous status. 413 * <p> 414 * If the application performs focus transfer between different 415 * heavyweight containers and sets the lightweight focus request 416 * status to synchronous for any of its windows, then further focus 417 * behaviour is unspecified. 418 * <p> 419 * @param w window for which the lightweight focus request status 420 * should be set 421 * @param status the value of lightweight focus request status 422 */ 423 424 public static void setLWRequestStatus(Window changed,boolean status){ 425 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 426 }; 427 428 public static void checkAndSetPolicy(Container cont) { 429 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager. 430 getCurrentKeyboardFocusManager(). 431 getDefaultFocusTraversalPolicy(); 432 433 cont.setFocusTraversalPolicy(defaultPolicy); 434 } 435 436 private static FocusTraversalPolicy createLayoutPolicy() { 437 FocusTraversalPolicy policy = null; 438 try { 439 Class<?> layoutPolicyClass = 440 Class.forName("javax.swing.LayoutFocusTraversalPolicy"); 441 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance(); 442 } 443 catch (ClassNotFoundException e) { 444 assert false; 445 } 446 catch (InstantiationException e) { 447 assert false; 448 } 449 catch (IllegalAccessException e) { 450 assert false; 451 } 452 453 return policy; 454 } 455 456 /* 457 * Insert a mapping from target to AppContext, for later retrieval 458 * via targetToAppContext() above. 459 */ 460 public static void insertTargetMapping(Object target, AppContext appContext) { 461 if (!setAppContext(target, appContext)) { 462 // Target is not a Component/MenuComponent, use the private Map 463 // instead. 464 appContextMap.put(target, appContext); 465 } 466 } 467 468 /* 469 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 470 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 471 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 472 * not be called under another lock since it locks the EventQueue. 473 * See bugids 4632918, 4526597. 474 */ 475 public static void postEvent(AppContext appContext, AWTEvent event) { 476 if (event == null) { 477 throw new NullPointerException(); 478 } 479 480 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor(); 481 if (sea != null && sea.isSequencedEvent(event)) { 482 AWTEvent nested = sea.getNested(event); 483 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS && 484 nested instanceof TimedWindowEvent) 485 { 486 TimedWindowEvent twe = (TimedWindowEvent)nested; 487 ((SunToolkit)Toolkit.getDefaultToolkit()). 488 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen()); 489 } 490 } 491 492 // All events posted via this method are system-generated. 493 // Placing the following call here reduces considerably the 494 // number of places throughout the toolkit that would 495 // otherwise have to be modified to precisely identify 496 // system-generated events. 497 setSystemGenerated(event); 498 AppContext eventContext = targetToAppContext(event.getSource()); 499 if (eventContext != null && !eventContext.equals(appContext)) { 500 throw new RuntimeException("Event posted on wrong app context : " + event); 501 } 502 PostEventQueue postEventQueue = 503 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 504 if (postEventQueue != null) { 505 postEventQueue.postEvent(event); 506 } 507 } 508 509 /* 510 * Post AWTEvent of high priority. 511 */ 512 public static void postPriorityEvent(final AWTEvent e) { 513 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 514 public void run() { 515 AWTAccessor.getAWTEventAccessor().setPosted(e); 516 ((Component)e.getSource()).dispatchEvent(e); 517 } 518 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 519 postEvent(targetToAppContext(e.getSource()), pe); 520 } 521 522 /* 523 * Flush any pending events which haven't been posted to the AWT 524 * EventQueue yet. 525 */ 526 public static void flushPendingEvents() { 527 AppContext appContext = AppContext.getAppContext(); 528 flushPendingEvents(appContext); 529 } 530 531 /* 532 * Flush the PostEventQueue for the right AppContext. 533 * The default flushPendingEvents only flushes the thread-local context, 534 * which is not always correct, c.f. 3746956 535 */ 536 public static void flushPendingEvents(AppContext appContext) { 537 PostEventQueue postEventQueue = 538 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 539 if (postEventQueue != null) { 540 postEventQueue.flush(); 541 } 542 } 543 544 /* 545 * Execute a chunk of code on the Java event handler thread for the 546 * given target. Does not wait for the execution to occur before 547 * returning to the caller. 548 */ 549 public static void executeOnEventHandlerThread(Object target, 550 Runnable runnable) { 551 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 552 } 553 554 /* 555 * Fixed 5064013: the InvocationEvent time should be equals 556 * the time of the ActionEvent 557 */ 558 @SuppressWarnings("serial") 559 public static void executeOnEventHandlerThread(Object target, 560 Runnable runnable, 561 final long when) { 562 executeOnEventHandlerThread( 563 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 564 public long getWhen() { 565 return when; 566 } 567 }); 568 } 569 570 /* 571 * Execute a chunk of code on the Java event handler thread for the 572 * given target. Does not wait for the execution to occur before 573 * returning to the caller. 574 */ 575 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 576 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 577 } 578 579 /* 580 * Execute a chunk of code on the Java event handler thread. The 581 * method takes into account provided AppContext and sets 582 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the 583 * event. See 6451487 for detailes. 584 * Does not wait for the execution to occur before returning to 585 * the caller. 586 */ 587 public static void invokeLaterOnAppContext( 588 AppContext appContext, Runnable dispatcher) 589 { 590 postEvent(appContext, 591 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 592 PeerEvent.PRIORITY_EVENT)); 593 } 594 595 /* 596 * Execute a chunk of code on the Java event handler thread for the 597 * given target. Waits for the execution to occur before returning 598 * to the caller. 599 */ 600 public static void executeOnEDTAndWait(Object target, Runnable runnable) 601 throws InterruptedException, InvocationTargetException 602 { 603 if (EventQueue.isDispatchThread()) { 604 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 605 } 606 607 class AWTInvocationLock {} 608 Object lock = new AWTInvocationLock(); 609 610 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 611 612 synchronized (lock) { 613 executeOnEventHandlerThread(event); 614 while(!event.isDispatched()) { 615 lock.wait(); 616 } 617 } 618 619 Throwable eventThrowable = event.getThrowable(); 620 if (eventThrowable != null) { 621 throw new InvocationTargetException(eventThrowable); 622 } 623 } 624 625 /* 626 * Returns true if the calling thread is the event dispatch thread 627 * contained within AppContext which associated with the given target. 628 * Use this call to ensure that a given task is being executed 629 * (or not being) on the event dispatch thread for the given target. 630 */ 631 public static boolean isDispatchThreadForAppContext(Object target) { 632 AppContext appContext = targetToAppContext(target); 633 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 634 635 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 636 return accessor.isDispatchThreadImpl(eq); 637 } 638 639 public Dimension getScreenSize() { 640 return new Dimension(getScreenWidth(), getScreenHeight()); 641 } 642 protected abstract int getScreenWidth(); 643 protected abstract int getScreenHeight(); 644 645 @SuppressWarnings("deprecation") 646 public FontMetrics getFontMetrics(Font font) { 647 return FontDesignMetrics.getMetrics(font); 648 } 649 650 @SuppressWarnings("deprecation") 651 public String[] getFontList() { 652 String[] hardwiredFontList = { 653 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 654 Font.DIALOG_INPUT 655 656 // -- Obsolete font names from 1.0.2. It was decided that 657 // -- getFontList should not return these old names: 658 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 659 }; 660 return hardwiredFontList; 661 } 662 663 public PanelPeer createPanel(Panel target) { 664 return (PanelPeer)createComponent(target); 665 } 666 667 public CanvasPeer createCanvas(Canvas target) { 668 return (CanvasPeer)createComponent(target); 669 } 670 671 /** 672 * Disables erasing of background on the canvas before painting if 673 * this is supported by the current toolkit. It is recommended to 674 * call this method early, before the Canvas becomes displayable, 675 * because some Toolkit implementations do not support changing 676 * this property once the Canvas becomes displayable. 677 */ 678 public void disableBackgroundErase(Canvas canvas) { 679 disableBackgroundEraseImpl(canvas); 680 } 681 682 /** 683 * Disables the native erasing of the background on the given 684 * component before painting if this is supported by the current 685 * toolkit. This only has an effect for certain components such as 686 * Canvas, Panel and Window. It is recommended to call this method 687 * early, before the Component becomes displayable, because some 688 * Toolkit implementations do not support changing this property 689 * once the Component becomes displayable. 690 */ 691 public void disableBackgroundErase(Component component) { 692 disableBackgroundEraseImpl(component); 693 } 694 695 private void disableBackgroundEraseImpl(Component component) { 696 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 697 } 698 699 /** 700 * Returns the value of "sun.awt.noerasebackground" property. Default 701 * value is {@code false}. 702 */ 703 public static boolean getSunAwtNoerasebackground() { 704 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 705 } 706 707 /** 708 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 709 * value is {@code false}. 710 */ 711 public static boolean getSunAwtErasebackgroundonresize() { 712 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 713 } 714 715 716 static final SoftCache imgCache = new SoftCache(); 717 718 static Image getImageFromHash(Toolkit tk, URL url) { 719 checkPermissions(url); 720 synchronized (imgCache) { 721 Image img = (Image)imgCache.get(url); 722 if (img == null) { 723 try { 724 img = tk.createImage(new URLImageSource(url)); 725 imgCache.put(url, img); 726 } catch (Exception e) { 727 } 728 } 729 return img; 730 } 731 } 732 733 static Image getImageFromHash(Toolkit tk, 734 String filename) { 735 checkPermissions(filename); 736 synchronized (imgCache) { 737 Image img = (Image)imgCache.get(filename); 738 if (img == null) { 739 try { 740 img = tk.createImage(new FileImageSource(filename)); 741 imgCache.put(filename, img); 742 } catch (Exception e) { 743 } 744 } 745 return img; 746 } 747 } 748 749 public Image getImage(String filename) { 750 return getImageFromHash(this, filename); 751 } 752 753 public Image getImage(URL url) { 754 return getImageFromHash(this, url); 755 } 756 757 protected Image getImageWithResolutionVariant(String fileName, 758 String resolutionVariantName) { 759 synchronized (imgCache) { 760 Image image = getImageFromHash(this, fileName); 761 if (image instanceof MultiResolutionImage) { 762 return image; 763 } 764 Image resolutionVariant = getImageFromHash(this, resolutionVariantName); 765 image = createImageWithResolutionVariant(image, resolutionVariant); 766 imgCache.put(fileName, image); 767 return image; 768 } 769 } 770 771 protected Image getImageWithResolutionVariant(URL url, 772 URL resolutionVariantURL) { 773 synchronized (imgCache) { 774 Image image = getImageFromHash(this, url); 775 if (image instanceof MultiResolutionImage) { 776 return image; 777 } 778 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL); 779 image = createImageWithResolutionVariant(image, resolutionVariant); 780 imgCache.put(url, image); 781 return image; 782 } 783 } 784 785 786 public Image createImage(String filename) { 787 checkPermissions(filename); 788 return createImage(new FileImageSource(filename)); 789 } 790 791 public Image createImage(URL url) { 792 checkPermissions(url); 793 return createImage(new URLImageSource(url)); 794 } 795 796 public Image createImage(byte[] data, int offset, int length) { 797 return createImage(new ByteArrayImageSource(data, offset, length)); 798 } 799 800 public Image createImage(ImageProducer producer) { 801 return new ToolkitImage(producer); 802 } 803 804 public static Image createImageWithResolutionVariant(Image image, 805 Image resolutionVariant) { 806 return new MultiResolutionToolkitImage(image, resolutionVariant); 807 } 808 809 public int checkImage(Image img, int w, int h, ImageObserver o) { 810 if (!(img instanceof ToolkitImage)) { 811 return ImageObserver.ALLBITS; 812 } 813 814 ToolkitImage tkimg = (ToolkitImage)img; 815 int repbits; 816 if (w == 0 || h == 0) { 817 repbits = ImageObserver.ALLBITS; 818 } else { 819 repbits = tkimg.getImageRep().check(o); 820 } 821 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o); 822 } 823 824 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 825 if (w == 0 || h == 0) { 826 return true; 827 } 828 829 // Must be a ToolkitImage 830 if (!(img instanceof ToolkitImage)) { 831 return true; 832 } 833 834 ToolkitImage tkimg = (ToolkitImage)img; 835 if (tkimg.hasError()) { 836 if (o != null) { 837 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 838 -1, -1, -1, -1); 839 } 840 return false; 841 } 842 ImageRepresentation ir = tkimg.getImageRep(); 843 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o); 844 } 845 846 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) { 847 ToolkitImage rvImage = getResolutionVariant(img); 848 int rvw = getRVSize(w); 849 int rvh = getRVSize(h); 850 // Ignore the resolution variant in case of error 851 return (rvImage == null || rvImage.hasError()) ? 0xFFFF : 852 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage. 853 getResolutionVariantObserver( 854 img, o, w, h, rvw, rvh, true)); 855 } 856 857 private boolean prepareResolutionVariant(Image img, int w, int h, 858 ImageObserver o) { 859 860 ToolkitImage rvImage = getResolutionVariant(img); 861 int rvw = getRVSize(w); 862 int rvh = getRVSize(h); 863 // Ignore the resolution variant in case of error 864 return rvImage == null || rvImage.hasError() || prepareImage( 865 rvImage, rvw, rvh, 866 MultiResolutionToolkitImage.getResolutionVariantObserver( 867 img, o, w, h, rvw, rvh, true)); 868 } 869 870 private static int getRVSize(int size){ 871 return size == -1 ? -1 : 2 * size; 872 } 873 874 private static ToolkitImage getResolutionVariant(Image image) { 875 if (image instanceof MultiResolutionToolkitImage) { 876 Image resolutionVariant = ((MultiResolutionToolkitImage) image). 877 getResolutionVariant(); 878 if (resolutionVariant instanceof ToolkitImage) { 879 return (ToolkitImage) resolutionVariant; 880 } 881 } 882 return null; 883 } 884 885 protected static boolean imageCached(Object key) { 886 return imgCache.containsKey(key); 887 } 888 889 protected static boolean imageExists(String filename) { 890 checkPermissions(filename); 891 return filename != null && new File(filename).exists(); 892 } 893 894 @SuppressWarnings("try") 895 protected static boolean imageExists(URL url) { 896 checkPermissions(url); 897 if (url != null) { 898 try (InputStream is = url.openStream()) { 899 return true; 900 }catch(IOException e){ 901 return false; 902 } 903 } 904 return false; 905 } 906 907 private static void checkPermissions(String filename) { 908 SecurityManager security = System.getSecurityManager(); 909 if (security != null) { 910 security.checkRead(filename); 911 } 912 } 913 914 private static void checkPermissions(URL url) { 915 SecurityManager sm = System.getSecurityManager(); 916 if (sm != null) { 917 try { 918 java.security.Permission perm = 919 url.openConnection().getPermission(); 920 if (perm != null) { 921 try { 922 sm.checkPermission(perm); 923 } catch (SecurityException se) { 924 // fallback to checkRead/checkConnect for pre 1.2 925 // security managers 926 if ((perm instanceof java.io.FilePermission) && 927 perm.getActions().indexOf("read") != -1) { 928 sm.checkRead(perm.getName()); 929 } else if ((perm instanceof 930 java.net.SocketPermission) && 931 perm.getActions().indexOf("connect") != -1) { 932 sm.checkConnect(url.getHost(), url.getPort()); 933 } else { 934 throw se; 935 } 936 } 937 } 938 } catch (java.io.IOException ioe) { 939 sm.checkConnect(url.getHost(), url.getPort()); 940 } 941 } 942 } 943 944 /** 945 * Scans {@code imageList} for best-looking image of specified dimensions. 946 * Image can be scaled and/or padded with transparency. 947 */ 948 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) { 949 if (width == 0 || height == 0) { 950 return null; 951 } 952 Image bestImage = null; 953 int bestWidth = 0; 954 int bestHeight = 0; 955 double bestSimilarity = 3; //Impossibly high value 956 double bestScaleFactor = 0; 957 for (Iterator<Image> i = imageList.iterator();i.hasNext();) { 958 //Iterate imageList looking for best matching image. 959 //'Similarity' measure is defined as good scale factor and small insets. 960 //best possible similarity is 0 (no scale, no insets). 961 //It's found while the experiments that good-looking result is achieved 962 //with scale factors x1, x3/4, x2/3, xN, x1/N. 963 Image im = i.next(); 964 if (im == null) { 965 continue; 966 } 967 if (im instanceof ToolkitImage) { 968 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 969 ir.reconstruct(ImageObserver.ALLBITS); 970 } 971 int iw; 972 int ih; 973 try { 974 iw = im.getWidth(null); 975 ih = im.getHeight(null); 976 } catch (Exception e){ 977 continue; 978 } 979 if (iw > 0 && ih > 0) { 980 //Calc scale factor 981 double scaleFactor = Math.min((double)width / (double)iw, 982 (double)height / (double)ih); 983 //Calculate scaled image dimensions 984 //adjusting scale factor to nearest "good" value 985 int adjw = 0; 986 int adjh = 0; 987 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 988 if (scaleFactor >= 2) { 989 //Need to enlarge image more than twice 990 //Round down scale factor to multiply by integer value 991 scaleFactor = Math.floor(scaleFactor); 992 adjw = iw * (int)scaleFactor; 993 adjh = ih * (int)scaleFactor; 994 scaleMeasure = 1.0 - 0.5 / scaleFactor; 995 } else if (scaleFactor >= 1) { 996 //Don't scale 997 scaleFactor = 1.0; 998 adjw = iw; 999 adjh = ih; 1000 scaleMeasure = 0; 1001 } else if (scaleFactor >= 0.75) { 1002 //Multiply by 3/4 1003 scaleFactor = 0.75; 1004 adjw = iw * 3 / 4; 1005 adjh = ih * 3 / 4; 1006 scaleMeasure = 0.3; 1007 } else if (scaleFactor >= 0.6666) { 1008 //Multiply by 2/3 1009 scaleFactor = 0.6666; 1010 adjw = iw * 2 / 3; 1011 adjh = ih * 2 / 3; 1012 scaleMeasure = 0.33; 1013 } else { 1014 //Multiply size by 1/scaleDivider 1015 //where scaleDivider is minimum possible integer 1016 //larger than 1/scaleFactor 1017 double scaleDivider = Math.ceil(1.0 / scaleFactor); 1018 scaleFactor = 1.0 / scaleDivider; 1019 adjw = (int)Math.round((double)iw / scaleDivider); 1020 adjh = (int)Math.round((double)ih / scaleDivider); 1021 scaleMeasure = 1.0 - 1.0 / scaleDivider; 1022 } 1023 double similarity = ((double)width - (double)adjw) / (double)width + 1024 ((double)height - (double)adjh) / (double)height + //Large padding is bad 1025 scaleMeasure; //Large rescale is bad 1026 if (similarity < bestSimilarity) { 1027 bestSimilarity = similarity; 1028 bestScaleFactor = scaleFactor; 1029 bestImage = im; 1030 bestWidth = adjw; 1031 bestHeight = adjh; 1032 } 1033 if (similarity == 0) break; 1034 } 1035 } 1036 if (bestImage == null) { 1037 //No images were found, possibly all are broken 1038 return null; 1039 } 1040 BufferedImage bimage = 1041 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 1042 Graphics2D g = bimage.createGraphics(); 1043 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 1044 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 1045 try { 1046 int x = (width - bestWidth) / 2; 1047 int y = (height - bestHeight) / 2; 1048 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 1049 } finally { 1050 g.dispose(); 1051 } 1052 return bimage; 1053 } 1054 1055 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1056 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1057 if (bimage == null) { 1058 return null; 1059 } 1060 Raster raster = bimage.getRaster(); 1061 DataBuffer buffer = raster.getDataBuffer(); 1062 return (DataBufferInt)buffer; 1063 } 1064 1065 protected EventQueue getSystemEventQueueImpl() { 1066 return getSystemEventQueueImplPP(); 1067 } 1068 1069 // Package private implementation 1070 static EventQueue getSystemEventQueueImplPP() { 1071 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1072 } 1073 1074 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1075 EventQueue theEventQueue = 1076 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1077 return theEventQueue; 1078 } 1079 1080 /** 1081 * Give native peers the ability to query the native container 1082 * given a native component (eg the direct parent may be lightweight). 1083 */ 1084 public static Container getNativeContainer(Component c) { 1085 return Toolkit.getNativeContainer(c); 1086 } 1087 1088 /** 1089 * Gives native peers the ability to query the closest HW component. 1090 * If the given component is heavyweight, then it returns this. Otherwise, 1091 * it goes one level up in the hierarchy and tests next component. 1092 */ 1093 public static Component getHeavyweightComponent(Component c) { 1094 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1095 c = AWTAccessor.getComponentAccessor().getParent(c); 1096 } 1097 return c; 1098 } 1099 1100 /** 1101 * Returns key modifiers used by Swing to set up a focus accelerator key stroke. 1102 */ 1103 public int getFocusAcceleratorKeyMask() { 1104 return InputEvent.ALT_MASK; 1105 } 1106 1107 /** 1108 * Tests whether specified key modifiers mask can be used to enter a printable 1109 * character. This is a default implementation of this method, which reflects 1110 * the way things work on Windows: here, pressing ctrl + alt allows user to enter 1111 * characters from the extended character set (like euro sign or math symbols) 1112 */ 1113 public boolean isPrintableCharacterModifiersMask(int mods) { 1114 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK)); 1115 } 1116 1117 /** 1118 * Returns whether popup is allowed to be shown above the task bar. 1119 * This is a default implementation of this method, which checks 1120 * corresponding security permission. 1121 */ 1122 public boolean canPopupOverlapTaskBar() { 1123 boolean result = true; 1124 try { 1125 SecurityManager sm = System.getSecurityManager(); 1126 if (sm != null) { 1127 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION); 1128 } 1129 } catch (SecurityException se) { 1130 // There is no permission to show popups over the task bar 1131 result = false; 1132 } 1133 return result; 1134 } 1135 1136 /** 1137 * Returns a new input method window, with behavior as specified in 1138 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1139 * If the inputContext is not null, the window should return it from its 1140 * getInputContext() method. The window needs to implement 1141 * sun.awt.im.InputMethodWindow. 1142 * <p> 1143 * SunToolkit subclasses can override this method to return better input 1144 * method windows. 1145 */ 1146 public Window createInputMethodWindow(String title, InputContext context) { 1147 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1148 } 1149 1150 /** 1151 * Returns whether enableInputMethods should be set to true for peered 1152 * TextComponent instances on this platform. False by default. 1153 */ 1154 public boolean enableInputMethodsForTextComponent() { 1155 return false; 1156 } 1157 1158 private static Locale startupLocale = null; 1159 1160 /** 1161 * Returns the locale in which the runtime was started. 1162 */ 1163 public static Locale getStartupLocale() { 1164 if (startupLocale == null) { 1165 String language, region, country, variant; 1166 language = AccessController.doPrivileged( 1167 new GetPropertyAction("user.language", "en")); 1168 // for compatibility, check for old user.region property 1169 region = AccessController.doPrivileged( 1170 new GetPropertyAction("user.region")); 1171 if (region != null) { 1172 // region can be of form country, country_variant, or _variant 1173 int i = region.indexOf('_'); 1174 if (i >= 0) { 1175 country = region.substring(0, i); 1176 variant = region.substring(i + 1); 1177 } else { 1178 country = region; 1179 variant = ""; 1180 } 1181 } else { 1182 country = AccessController.doPrivileged( 1183 new GetPropertyAction("user.country", "")); 1184 variant = AccessController.doPrivileged( 1185 new GetPropertyAction("user.variant", "")); 1186 } 1187 startupLocale = new Locale(language, country, variant); 1188 } 1189 return startupLocale; 1190 } 1191 1192 /** 1193 * Returns the default keyboard locale of the underlying operating system 1194 */ 1195 public Locale getDefaultKeyboardLocale() { 1196 return getStartupLocale(); 1197 } 1198 1199 private static DefaultMouseInfoPeer mPeer = null; 1200 1201 protected synchronized MouseInfoPeer getMouseInfoPeer() { 1202 if (mPeer == null) { 1203 mPeer = new DefaultMouseInfoPeer(); 1204 } 1205 return mPeer; 1206 } 1207 1208 1209 /** 1210 * Returns whether default toolkit needs the support of the xembed 1211 * from embedding host(if any). 1212 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1213 */ 1214 public static boolean needsXEmbed() { 1215 String noxembed = AccessController. 1216 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1217 if ("true".equals(noxembed)) { 1218 return false; 1219 } 1220 1221 Toolkit tk = Toolkit.getDefaultToolkit(); 1222 if (tk instanceof SunToolkit) { 1223 // SunToolkit descendants should override this method to specify 1224 // concrete behavior 1225 return ((SunToolkit)tk).needsXEmbedImpl(); 1226 } else { 1227 // Non-SunToolkit doubtly might support XEmbed 1228 return false; 1229 } 1230 } 1231 1232 /** 1233 * Returns whether this toolkit needs the support of the xembed 1234 * from embedding host(if any). 1235 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1236 */ 1237 protected boolean needsXEmbedImpl() { 1238 return false; 1239 } 1240 1241 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1242 1243 /** 1244 * Returns whether the XEmbed server feature is requested by 1245 * developer. If true, Toolkit should return an 1246 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1247 */ 1248 protected final boolean isXEmbedServerRequested() { 1249 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1250 } 1251 1252 /** 1253 * Returns whether the modal exclusion API is supported by the current toolkit. 1254 * When it isn't supported, calling <code>setModalExcluded</code> has no 1255 * effect, and <code>isModalExcluded</code> returns false for all windows. 1256 * 1257 * @return true if modal exclusion is supported by the toolkit, false otherwise 1258 * 1259 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1260 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1261 * 1262 * @since 1.5 1263 */ 1264 public static boolean isModalExcludedSupported() 1265 { 1266 Toolkit tk = Toolkit.getDefaultToolkit(); 1267 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1268 } 1269 /* 1270 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1271 * 1272 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1273 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1274 * 1275 * @since 1.5 1276 */ 1277 protected boolean isModalExcludedSupportedImpl() 1278 { 1279 return false; 1280 } 1281 1282 /* 1283 * Sets this window to be excluded from being modally blocked. When the 1284 * toolkit supports modal exclusion and this method is called, input 1285 * events, focus transfer and z-order will continue to work for the 1286 * window, it's owned windows and child components, even in the 1287 * presence of a modal dialog. 1288 * For details on which <code>Window</code>s are normally blocked 1289 * by modal dialog, see {@link java.awt.Dialog}. 1290 * Invoking this method when the modal exclusion API is not supported by 1291 * the current toolkit has no effect. 1292 * @param window Window to be marked as not modally blocked 1293 * @see java.awt.Dialog 1294 * @see java.awt.Dialog#setModal(boolean) 1295 * @see sun.awt.SunToolkit#isModalExcludedSupported 1296 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1297 */ 1298 public static void setModalExcluded(Window window) 1299 { 1300 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1301 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1302 } 1303 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1304 } 1305 1306 /* 1307 * Returns whether the specified window is blocked by modal dialogs. 1308 * If the modal exclusion API isn't supported by the current toolkit, 1309 * it returns false for all windows. 1310 * 1311 * @param window Window to test for modal exclusion 1312 * 1313 * @return true if the window is modal excluded, false otherwise. If 1314 * the modal exclusion isn't supported by the current Toolkit, false 1315 * is returned 1316 * 1317 * @see sun.awt.SunToolkit#isModalExcludedSupported 1318 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1319 * 1320 * @since 1.5 1321 */ 1322 public static boolean isModalExcluded(Window window) 1323 { 1324 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1325 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1326 } 1327 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1328 } 1329 1330 /** 1331 * Overridden in XToolkit and WToolkit 1332 */ 1333 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1334 return (modalityType == Dialog.ModalityType.MODELESS) || 1335 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1336 } 1337 1338 /** 1339 * Overridden in XToolkit and WToolkit 1340 */ 1341 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1342 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1343 } 1344 1345 /////////////////////////////////////////////////////////////////////////// 1346 // 1347 // The following is used by the Java Plug-in to coordinate dialog modality 1348 // between containing applications (browsers, ActiveX containers etc) and 1349 // the AWT. 1350 // 1351 /////////////////////////////////////////////////////////////////////////// 1352 1353 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1354 1355 public void addModalityListener(ModalityListener listener) { 1356 modalityListeners.add(listener); 1357 } 1358 1359 public void removeModalityListener(ModalityListener listener) { 1360 modalityListeners.remove(listener); 1361 } 1362 1363 public void notifyModalityPushed(Dialog dialog) { 1364 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1365 } 1366 1367 public void notifyModalityPopped(Dialog dialog) { 1368 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1369 } 1370 1371 final void notifyModalityChange(int id, Dialog source) { 1372 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1373 ev.dispatch(); 1374 } 1375 1376 static class ModalityListenerList implements ModalityListener { 1377 1378 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1379 1380 void add(ModalityListener listener) { 1381 listeners.addElement(listener); 1382 } 1383 1384 void remove(ModalityListener listener) { 1385 listeners.removeElement(listener); 1386 } 1387 1388 public void modalityPushed(ModalityEvent ev) { 1389 Iterator<ModalityListener> it = listeners.iterator(); 1390 while (it.hasNext()) { 1391 it.next().modalityPushed(ev); 1392 } 1393 } 1394 1395 public void modalityPopped(ModalityEvent ev) { 1396 Iterator<ModalityListener> it = listeners.iterator(); 1397 while (it.hasNext()) { 1398 it.next().modalityPopped(ev); 1399 } 1400 } 1401 } // end of class ModalityListenerList 1402 1403 /////////////////////////////////////////////////////////////////////////// 1404 // End Plug-in code 1405 /////////////////////////////////////////////////////////////////////////// 1406 1407 public static boolean isLightweightOrUnknown(Component comp) { 1408 if (comp.isLightweight() 1409 || !(getDefaultToolkit() instanceof SunToolkit)) 1410 { 1411 return true; 1412 } 1413 return !(comp instanceof Button 1414 || comp instanceof Canvas 1415 || comp instanceof Checkbox 1416 || comp instanceof Choice 1417 || comp instanceof Label 1418 || comp instanceof java.awt.List 1419 || comp instanceof Panel 1420 || comp instanceof Scrollbar 1421 || comp instanceof ScrollPane 1422 || comp instanceof TextArea 1423 || comp instanceof TextField 1424 || comp instanceof Window); 1425 } 1426 1427 @SuppressWarnings("serial") 1428 public static class OperationTimedOut extends RuntimeException { 1429 public OperationTimedOut(String msg) { 1430 super(msg); 1431 } 1432 public OperationTimedOut() { 1433 } 1434 } 1435 1436 @SuppressWarnings("serial") 1437 public static class InfiniteLoop extends RuntimeException { 1438 } 1439 1440 @SuppressWarnings("serial") 1441 public static class IllegalThreadException extends RuntimeException { 1442 public IllegalThreadException(String msg) { 1443 super(msg); 1444 } 1445 public IllegalThreadException() { 1446 } 1447 } 1448 1449 public static final int DEFAULT_WAIT_TIME = 10000; 1450 private static final int MAX_ITERS = 20; 1451 private static final int MIN_ITERS = 0; 1452 private static final int MINIMAL_EDELAY = 0; 1453 1454 /** 1455 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1456 */ 1457 public void realSync() throws OperationTimedOut, InfiniteLoop { 1458 realSync(DEFAULT_WAIT_TIME); 1459 } 1460 1461 /** 1462 * Forces toolkit to synchronize with the native windowing 1463 * sub-system, flushing all pending work and waiting for all the 1464 * events to be processed. This method guarantees that after 1465 * return no additional Java events will be generated, unless 1466 * cause by user. Obviously, the method cannot be used on the 1467 * event dispatch thread (EDT). In case it nevertheless gets 1468 * invoked on this thread, the method throws the 1469 * IllegalThreadException runtime exception. 1470 * 1471 * <p> This method allows to write tests without explicit timeouts 1472 * or wait for some event. Example: 1473 * <code> 1474 * Frame f = ...; 1475 * f.setVisible(true); 1476 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1477 * </code> 1478 * 1479 * <p> After realSync, <code>f</code> will be completely visible 1480 * on the screen, its getLocationOnScreen will be returning the 1481 * right result and it will be the focus owner. 1482 * 1483 * <p> Another example: 1484 * <code> 1485 * b.requestFocus(); 1486 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1487 * </code> 1488 * 1489 * <p> After realSync, <code>b</code> will be focus owner. 1490 * 1491 * <p> Notice that realSync isn't guaranteed to work if recurring 1492 * actions occur, such as if during processing of some event 1493 * another request which may generate some events occurs. By 1494 * default, sync tries to perform as much as {@value MAX_ITERS} 1495 * cycles of event processing, allowing for roughly {@value 1496 * MAX_ITERS} additional requests. 1497 * 1498 * <p> For example, requestFocus() generates native request, which 1499 * generates one or two Java focus events, which then generate a 1500 * serie of paint events, a serie of Java focus events, which then 1501 * generate a serie of paint events which then are processed - 1502 * three cycles, minimum. 1503 * 1504 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1505 */ 1506 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1507 { 1508 if (EventQueue.isDispatchThread()) { 1509 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1510 } 1511 int bigLoop = 0; 1512 do { 1513 // Let's do sync first 1514 sync(); 1515 1516 // During the wait process, when we were processing incoming 1517 // events, we could have made some new request, which can 1518 // generate new events. Example: MapNotify/XSetInputFocus. 1519 // Therefore, we dispatch them as long as there is something 1520 // to dispatch. 1521 int iters = 0; 1522 while (iters < MIN_ITERS) { 1523 syncNativeQueue(timeout); 1524 iters++; 1525 } 1526 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1527 iters++; 1528 } 1529 if (iters >= MAX_ITERS) { 1530 throw new InfiniteLoop(); 1531 } 1532 1533 // native requests were dispatched by X/Window Manager or Windows 1534 // Moreover, we processed them all on Toolkit thread 1535 // Now wait while EDT processes them. 1536 // 1537 // During processing of some events (focus, for example), 1538 // some other events could have been generated. So, after 1539 // waitForIdle, we may end up with full EventQueue 1540 iters = 0; 1541 while (iters < MIN_ITERS) { 1542 waitForIdle(timeout); 1543 iters++; 1544 } 1545 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1546 iters++; 1547 } 1548 if (iters >= MAX_ITERS) { 1549 throw new InfiniteLoop(); 1550 } 1551 1552 bigLoop++; 1553 // Again, for Java events, it was simple to check for new Java 1554 // events by checking event queue, but what if Java events 1555 // resulted in native requests? Therefor, check native events again. 1556 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1557 } 1558 1559 /** 1560 * Platform toolkits need to implement this method to perform the 1561 * sync of the native queue. The method should wait until native 1562 * requests are processed, all native events are processed and 1563 * corresponding Java events are generated. Should return 1564 * <code>true</code> if some events were processed, 1565 * <code>false</code> otherwise. 1566 */ 1567 protected abstract boolean syncNativeQueue(final long timeout); 1568 1569 private boolean eventDispatched = false; 1570 private boolean queueEmpty = false; 1571 private final Object waitLock = "Wait Lock"; 1572 1573 private boolean isEQEmpty() { 1574 EventQueue queue = getSystemEventQueueImpl(); 1575 return AWTAccessor.getEventQueueAccessor().noEvents(queue); 1576 } 1577 1578 /** 1579 * Waits for the Java event queue to empty. Ensures that all 1580 * events are processed (including paint events), and that if 1581 * recursive events were generated, they are also processed. 1582 * Should return <code>true</code> if more processing is 1583 * necessary, <code>false</code> otherwise. 1584 */ 1585 @SuppressWarnings("serial") 1586 protected final boolean waitForIdle(final long timeout) { 1587 flushPendingEvents(); 1588 boolean queueWasEmpty = isEQEmpty(); 1589 queueEmpty = false; 1590 eventDispatched = false; 1591 synchronized(waitLock) { 1592 postEvent(AppContext.getAppContext(), 1593 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1594 public void dispatch() { 1595 // Here we block EDT. It could have some 1596 // events, it should have dispatched them by 1597 // now. So native requests could have been 1598 // generated. First, dispatch them. Then, 1599 // flush Java events again. 1600 int iters = 0; 1601 while (iters < MIN_ITERS) { 1602 syncNativeQueue(timeout); 1603 iters++; 1604 } 1605 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1606 iters++; 1607 } 1608 flushPendingEvents(); 1609 1610 synchronized(waitLock) { 1611 queueEmpty = isEQEmpty(); 1612 eventDispatched = true; 1613 waitLock.notifyAll(); 1614 } 1615 } 1616 }); 1617 try { 1618 while (!eventDispatched) { 1619 waitLock.wait(); 1620 } 1621 } catch (InterruptedException ie) { 1622 return false; 1623 } 1624 } 1625 1626 try { 1627 Thread.sleep(MINIMAL_EDELAY); 1628 } catch (InterruptedException ie) { 1629 throw new RuntimeException("Interrupted"); 1630 } 1631 1632 flushPendingEvents(); 1633 1634 // Lock to force write-cache flush for queueEmpty. 1635 synchronized (waitLock) { 1636 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1637 } 1638 } 1639 1640 /** 1641 * Grabs the mouse input for the given window. The window must be 1642 * visible. The window or its children do not receive any 1643 * additional mouse events besides those targeted to them. All 1644 * other events will be dispatched as before - to the respective 1645 * targets. This Window will receive UngrabEvent when automatic 1646 * ungrab is about to happen. The event can be listened to by 1647 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1648 * UngrabEvent class for the list of conditions when ungrab is 1649 * about to happen. 1650 * @see UngrabEvent 1651 */ 1652 public abstract void grab(Window w); 1653 1654 /** 1655 * Forces ungrab. No event will be sent. 1656 */ 1657 public abstract void ungrab(Window w); 1658 1659 1660 /** 1661 * Locates the splash screen library in a platform dependent way and closes 1662 * the splash screen. Should be invoked on first top-level frame display. 1663 * @see java.awt.SplashScreen 1664 * @since 1.6 1665 */ 1666 public static native void closeSplashScreen(); 1667 1668 /* The following methods and variables are to support retrieving 1669 * desktop text anti-aliasing settings 1670 */ 1671 1672 /* Need an instance method because setDesktopProperty(..) is protected. */ 1673 private void fireDesktopFontPropertyChanges() { 1674 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1675 SunToolkit.getDesktopFontHints()); 1676 } 1677 1678 private static boolean checkedSystemAAFontSettings; 1679 private static boolean useSystemAAFontSettings; 1680 private static boolean lastExtraCondition = true; 1681 private static RenderingHints desktopFontHints; 1682 1683 /* Since Swing is the reason for this "extra condition" logic its 1684 * worth documenting it in some detail. 1685 * First, a goal is for Swing and applications to both retrieve and 1686 * use the same desktop property value so that there is complete 1687 * consistency between the settings used by JDK's Swing implementation 1688 * and 3rd party custom Swing components, custom L&Fs and any general 1689 * text rendering that wants to be consistent with these. 1690 * But by default on Solaris & Linux Swing will not use AA text over 1691 * remote X11 display (unless Xrender can be used which is TBD and may not 1692 * always be available anyway) as that is a noticeable performance hit. 1693 * So there needs to be a way to express that extra condition so that 1694 * it is seen by all clients of the desktop property API. 1695 * If this were the only condition it could be handled here as it would 1696 * be the same for any L&F and could reasonably be considered to be 1697 * a static behaviour of those systems. 1698 * But GTK currently has an additional test based on locale which is 1699 * not applied by Metal. So mixing GTK in a few locales with Metal 1700 * would mean the last one wins. 1701 * This could be stored per-app context which would work 1702 * for different applets, but wouldn't help for a single application 1703 * using GTK and some other L&F concurrently. 1704 * But it is expected this will be addressed within GTK and the font 1705 * system so is a temporary and somewhat unlikely harmless corner case. 1706 */ 1707 public static void setAAFontSettingsCondition(boolean extraCondition) { 1708 if (extraCondition != lastExtraCondition) { 1709 lastExtraCondition = extraCondition; 1710 if (checkedSystemAAFontSettings) { 1711 /* Someone already asked for this info, under a different 1712 * condition. 1713 * We'll force re-evaluation instead of replicating the 1714 * logic, then notify any listeners of any change. 1715 */ 1716 checkedSystemAAFontSettings = false; 1717 Toolkit tk = Toolkit.getDefaultToolkit(); 1718 if (tk instanceof SunToolkit) { 1719 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1720 } 1721 } 1722 } 1723 } 1724 1725 /* "false", "off", ""default" aren't explicitly tested, they 1726 * just fall through to produce a null return which all are equated to 1727 * "false". 1728 */ 1729 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1730 Object aaHint = null; 1731 hintname = hintname.toLowerCase(Locale.ENGLISH); 1732 if (hintname.equals("on")) { 1733 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1734 } else if (hintname.equals("gasp")) { 1735 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1736 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1737 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1738 } else if (hintname.equals("lcd_hbgr")) { 1739 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1740 } else if (hintname.equals("lcd_vrgb")) { 1741 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1742 } else if (hintname.equals("lcd_vbgr")) { 1743 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1744 } 1745 if (aaHint != null) { 1746 RenderingHints map = new RenderingHints(null); 1747 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1748 return map; 1749 } else { 1750 return null; 1751 } 1752 } 1753 1754 /* This method determines whether to use the system font settings, 1755 * or ignore them if a L&F has specified they should be ignored, or 1756 * to override both of these with a system property specified value. 1757 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1758 * system property isn't applied as desktop properties are considered 1759 * to be inapplicable in that case. In that headless case although 1760 * this method will return "true" the toolkit will return a null map. 1761 */ 1762 private static boolean useSystemAAFontSettings() { 1763 if (!checkedSystemAAFontSettings) { 1764 useSystemAAFontSettings = true; /* initially set this true */ 1765 String systemAAFonts = null; 1766 Toolkit tk = Toolkit.getDefaultToolkit(); 1767 if (tk instanceof SunToolkit) { 1768 systemAAFonts = 1769 AccessController.doPrivileged( 1770 new GetPropertyAction("awt.useSystemAAFontSettings")); 1771 } 1772 if (systemAAFonts != null) { 1773 useSystemAAFontSettings = 1774 Boolean.valueOf(systemAAFonts).booleanValue(); 1775 /* If it is anything other than "true", then it may be 1776 * a hint name , or it may be "off, "default", etc. 1777 */ 1778 if (!useSystemAAFontSettings) { 1779 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1780 } 1781 } 1782 /* If its still true, apply the extra condition */ 1783 if (useSystemAAFontSettings) { 1784 useSystemAAFontSettings = lastExtraCondition; 1785 } 1786 checkedSystemAAFontSettings = true; 1787 } 1788 return useSystemAAFontSettings; 1789 } 1790 1791 /* A variable defined for the convenience of JDK code */ 1792 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1793 1794 /* Overridden by subclasses to return platform/desktop specific values */ 1795 protected RenderingHints getDesktopAAHints() { 1796 return null; 1797 } 1798 1799 /* Subclass desktop property loading methods call this which 1800 * in turn calls the appropriate subclass implementation of 1801 * getDesktopAAHints() when system settings are being used. 1802 * Its public rather than protected because subclasses may delegate 1803 * to a helper class. 1804 */ 1805 public static RenderingHints getDesktopFontHints() { 1806 if (useSystemAAFontSettings()) { 1807 Toolkit tk = Toolkit.getDefaultToolkit(); 1808 if (tk instanceof SunToolkit) { 1809 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1810 return (RenderingHints)map; 1811 } else { /* Headless Toolkit */ 1812 return null; 1813 } 1814 } else if (desktopFontHints != null) { 1815 /* cloning not necessary as the return value is cloned later, but 1816 * its harmless. 1817 */ 1818 return (RenderingHints)(desktopFontHints.clone()); 1819 } else { 1820 return null; 1821 } 1822 } 1823 1824 1825 public abstract boolean isDesktopSupported(); 1826 1827 /* 1828 * consumeNextKeyTyped() method is not currently used, 1829 * however Swing could use it in the future. 1830 */ 1831 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1832 try { 1833 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped( 1834 (DefaultKeyboardFocusManager)KeyboardFocusManager. 1835 getCurrentKeyboardFocusManager(), 1836 keyEvent); 1837 } catch (ClassCastException cce) { 1838 cce.printStackTrace(); 1839 } 1840 } 1841 1842 protected static void dumpPeers(final PlatformLogger aLog) { 1843 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1844 } 1845 1846 /** 1847 * Returns the <code>Window</code> ancestor of the component <code>comp</code>. 1848 * @return Window ancestor of the component or component by itself if it is Window; 1849 * null, if component is not a part of window hierarchy 1850 */ 1851 public static Window getContainingWindow(Component comp) { 1852 while (comp != null && !(comp instanceof Window)) { 1853 comp = comp.getParent(); 1854 } 1855 return (Window)comp; 1856 } 1857 1858 private static Boolean sunAwtDisableMixing = null; 1859 1860 /** 1861 * Returns the value of "sun.awt.disableMixing" property. Default 1862 * value is {@code false}. 1863 */ 1864 public synchronized static boolean getSunAwtDisableMixing() { 1865 if (sunAwtDisableMixing == null) { 1866 sunAwtDisableMixing = AccessController.doPrivileged( 1867 new GetBooleanAction("sun.awt.disableMixing")); 1868 } 1869 return sunAwtDisableMixing.booleanValue(); 1870 } 1871 1872 /** 1873 * Returns true if the native GTK libraries are available. The 1874 * default implementation returns false, but UNIXToolkit overrides this 1875 * method to provide a more specific answer. 1876 */ 1877 public boolean isNativeGTKAvailable() { 1878 return false; 1879 } 1880 1881 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object(); 1882 1883 public synchronized void setWindowDeactivationTime(Window w, long time) { 1884 AppContext ctx = getAppContext(w); 1885 if (ctx == null) { 1886 return; 1887 } 1888 @SuppressWarnings("unchecked") 1889 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1890 if (map == null) { 1891 map = new WeakHashMap<Window, Long>(); 1892 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map); 1893 } 1894 map.put(w, time); 1895 } 1896 1897 public synchronized long getWindowDeactivationTime(Window w) { 1898 AppContext ctx = getAppContext(w); 1899 if (ctx == null) { 1900 return -1; 1901 } 1902 @SuppressWarnings("unchecked") 1903 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1904 if (map == null) { 1905 return -1; 1906 } 1907 Long time = map.get(w); 1908 return time == null ? -1 : time; 1909 } 1910 1911 // Cosntant alpha 1912 public boolean isWindowOpacitySupported() { 1913 return false; 1914 } 1915 1916 // Shaping 1917 public boolean isWindowShapingSupported() { 1918 return false; 1919 } 1920 1921 // Per-pixel alpha 1922 public boolean isWindowTranslucencySupported() { 1923 return false; 1924 } 1925 1926 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1927 return false; 1928 } 1929 1930 /** 1931 * Returns true if swing backbuffer should be translucent. 1932 */ 1933 public boolean isSwingBackbufferTranslucencySupported() { 1934 return false; 1935 } 1936 1937 /** 1938 * Returns whether or not a containing top level window for the passed 1939 * component is 1940 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1941 * 1942 * @param c a Component which toplevel's to check 1943 * @return {@code true} if the passed component is not null and has a 1944 * containing toplevel window which is opaque (so per-pixel translucency 1945 * is not enabled), {@code false} otherwise 1946 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 1947 */ 1948 public static boolean isContainingTopLevelOpaque(Component c) { 1949 Window w = getContainingWindow(c); 1950 return w != null && w.isOpaque(); 1951 } 1952 1953 /** 1954 * Returns whether or not a containing top level window for the passed 1955 * component is 1956 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 1957 * 1958 * @param c a Component which toplevel's to check 1959 * @return {@code true} if the passed component is not null and has a 1960 * containing toplevel window which has opacity less than 1961 * 1.0f (which means that it is translucent), {@code false} otherwise 1962 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 1963 */ 1964 public static boolean isContainingTopLevelTranslucent(Component c) { 1965 Window w = getContainingWindow(c); 1966 return w != null && w.getOpacity() < 1.0f; 1967 } 1968 1969 /** 1970 * Returns whether the native system requires using the peer.updateWindow() 1971 * method to update the contents of a non-opaque window, or if usual 1972 * painting procedures are sufficient. The default return value covers 1973 * the X11 systems. On MS Windows this method is overriden in WToolkit 1974 * to return true. 1975 */ 1976 public boolean needUpdateWindow() { 1977 return false; 1978 } 1979 1980 /** 1981 * Descendants of the SunToolkit should override and put their own logic here. 1982 */ 1983 public int getNumberOfButtons(){ 1984 return 3; 1985 } 1986 1987 /** 1988 * Checks that the given object implements/extends the given 1989 * interface/class. 1990 * 1991 * Note that using the instanceof operator causes a class to be loaded. 1992 * Using this method doesn't load a class and it can be used instead of 1993 * the instanceof operator for performance reasons. 1994 * 1995 * @param obj Object to be checked 1996 * @param type The name of the interface/class. Must be 1997 * fully-qualified interface/class name. 1998 * @return true, if this object implements/extends the given 1999 * interface/class, false, otherwise, or if obj or type is null 2000 */ 2001 public static boolean isInstanceOf(Object obj, String type) { 2002 if (obj == null) return false; 2003 if (type == null) return false; 2004 2005 return isInstanceOf(obj.getClass(), type); 2006 } 2007 2008 private static boolean isInstanceOf(Class<?> cls, String type) { 2009 if (cls == null) return false; 2010 2011 if (cls.getName().equals(type)) { 2012 return true; 2013 } 2014 2015 for (Class<?> c : cls.getInterfaces()) { 2016 if (c.getName().equals(type)) { 2017 return true; 2018 } 2019 } 2020 return isInstanceOf(cls.getSuperclass(), type); 2021 } 2022 2023 protected static LightweightFrame getLightweightFrame(Component c) { 2024 for (; c != null; c = c.getParent()) { 2025 if (c instanceof LightweightFrame) { 2026 return (LightweightFrame)c; 2027 } 2028 if (c instanceof Window) { 2029 // Don't traverse owner windows 2030 return null; 2031 } 2032 } 2033 return null; 2034 } 2035 2036 /////////////////////////////////////////////////////////////////////////// 2037 // 2038 // The following methods help set and identify whether a particular 2039 // AWTEvent object was produced by the system or by user code. As of this 2040 // writing the only consumer is the Java Plug-In, although this information 2041 // could be useful to more clients and probably should be formalized in 2042 // the public API. 2043 // 2044 /////////////////////////////////////////////////////////////////////////// 2045 2046 public static void setSystemGenerated(AWTEvent e) { 2047 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2048 } 2049 2050 public static boolean isSystemGenerated(AWTEvent e) { 2051 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2052 } 2053 2054 } // class SunToolkit 2055 2056 2057 /* 2058 * PostEventQueue is a Thread that runs in the same AppContext as the 2059 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2060 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2061 * events to this queue, which then calls EventQueue.postEvent(). 2062 * 2063 * We do this because EventQueue.postEvent() may be overridden by client 2064 * code, and we mustn't ever call client code from the toolkit thread. 2065 */ 2066 class PostEventQueue { 2067 private EventQueueItem queueHead = null; 2068 private EventQueueItem queueTail = null; 2069 private final EventQueue eventQueue; 2070 2071 private Thread flushThread = null; 2072 2073 PostEventQueue(EventQueue eq) { 2074 eventQueue = eq; 2075 } 2076 2077 /* 2078 * Continually post pending AWTEvents to the Java EventQueue. The method 2079 * is synchronized to ensure the flush is completed before a new event 2080 * can be posted to this queue. 2081 * 2082 * 7177040: The method couldn't be wholly synchronized because of calls 2083 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could 2084 * potentially lead to deadlock 2085 */ 2086 public void flush() { 2087 2088 Thread newThread = Thread.currentThread(); 2089 2090 try { 2091 EventQueueItem tempQueue; 2092 synchronized (this) { 2093 // Avoid method recursion 2094 if (newThread == flushThread) { 2095 return; 2096 } 2097 // Wait for other threads' flushing 2098 while (flushThread != null) { 2099 wait(); 2100 } 2101 // Skip everything if queue is empty 2102 if (queueHead == null) { 2103 return; 2104 } 2105 // Remember flushing thread 2106 flushThread = newThread; 2107 2108 tempQueue = queueHead; 2109 queueHead = queueTail = null; 2110 } 2111 try { 2112 while (tempQueue != null) { 2113 eventQueue.postEvent(tempQueue.event); 2114 tempQueue = tempQueue.next; 2115 } 2116 } 2117 finally { 2118 // Only the flushing thread can get here 2119 synchronized (this) { 2120 // Forget flushing thread, inform other pending threads 2121 flushThread = null; 2122 notifyAll(); 2123 } 2124 } 2125 } 2126 catch (InterruptedException e) { 2127 // Couldn't allow exception go up, so at least recover the flag 2128 newThread.interrupt(); 2129 } 2130 } 2131 2132 /* 2133 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2134 */ 2135 void postEvent(AWTEvent event) { 2136 EventQueueItem item = new EventQueueItem(event); 2137 2138 synchronized (this) { 2139 if (queueHead == null) { 2140 queueHead = queueTail = item; 2141 } else { 2142 queueTail.next = item; 2143 queueTail = item; 2144 } 2145 } 2146 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2147 } 2148 } // class PostEventQueue