1 /* 2 * Copyright (c) 1997, 2011, 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.net.URL; 39 import java.util.*; 40 import java.util.concurrent.TimeUnit; 41 import java.util.concurrent.locks.Condition; 42 import java.util.concurrent.locks.Lock; 43 import java.util.concurrent.locks.ReentrantLock; 44 import sun.util.logging.PlatformLogger; 45 import sun.misc.SoftCache; 46 import sun.font.FontDesignMetrics; 47 import sun.awt.im.InputContext; 48 import sun.awt.image.*; 49 import sun.security.action.GetPropertyAction; 50 import sun.security.action.GetBooleanAction; 51 import java.lang.reflect.Field; 52 import java.lang.reflect.Method; 53 import java.lang.reflect.Constructor; 54 import java.lang.reflect.InvocationTargetException; 55 import java.security.AccessController; 56 import java.security.PrivilegedAction; 57 import java.security.PrivilegedActionException; 58 import java.security.PrivilegedExceptionAction; 59 60 public abstract class SunToolkit extends Toolkit 61 implements WindowClosingSupport, WindowClosingListener, 62 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 63 64 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.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 private static Method wakeupMethod; 81 /* The key to put()/get() the PostEventQueue into/from the AppContext. 82 */ 83 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 84 85 /** 86 * Number of buttons. 87 * By default it's taken from the system. If system value does not 88 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 89 */ 90 protected static int numberOfButtons = 0; 91 92 93 /* XFree standard mention 24 buttons as maximum: 94 * http://www.xfree86.org/current/mouse.4.html 95 * We workaround systems supporting more than 24 buttons. 96 * Otherwise, we have to use long type values as masks 97 * which leads to API change. 98 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 99 * the 4-bytes limit for the int type. (CR 6799099) 100 * One more bit is reserved for FIRST_HIGH_BIT. 101 */ 102 public final static int MAX_BUTTONS_SUPPORTED = 20; 103 104 private static void initEQ(AppContext appContext) { 105 EventQueue eventQueue; 106 107 String eqName = System.getProperty("AWT.EventQueueClass", 108 "java.awt.EventQueue"); 109 110 try { 111 eventQueue = (EventQueue)Class.forName(eqName).newInstance(); 112 } catch (Exception e) { 113 e.printStackTrace(); 114 System.err.println("Failed loading " + eqName + ": " + e); 115 eventQueue = new EventQueue(); 116 } 117 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 118 119 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 120 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 121 } 122 123 public SunToolkit() { 124 // 7122796: Always create an EQ for the main AppContext 125 initEQ(AppContext.getMainAppContext()); 126 } 127 128 public boolean useBufferPerWindow() { 129 return false; 130 } 131 132 public abstract WindowPeer createWindow(Window target) 133 throws HeadlessException; 134 135 public abstract FramePeer createFrame(Frame target) 136 throws HeadlessException; 137 138 public abstract DialogPeer createDialog(Dialog target) 139 throws HeadlessException; 140 141 public abstract ButtonPeer createButton(Button target) 142 throws HeadlessException; 143 144 public abstract TextFieldPeer createTextField(TextField target) 145 throws HeadlessException; 146 147 public abstract ChoicePeer createChoice(Choice target) 148 throws HeadlessException; 149 150 public abstract LabelPeer createLabel(Label target) 151 throws HeadlessException; 152 153 public abstract ListPeer createList(java.awt.List target) 154 throws HeadlessException; 155 156 public abstract CheckboxPeer createCheckbox(Checkbox target) 157 throws HeadlessException; 158 159 public abstract ScrollbarPeer createScrollbar(Scrollbar target) 160 throws HeadlessException; 161 162 public abstract ScrollPanePeer createScrollPane(ScrollPane target) 163 throws HeadlessException; 164 165 public abstract TextAreaPeer createTextArea(TextArea target) 166 throws HeadlessException; 167 168 public abstract FileDialogPeer createFileDialog(FileDialog target) 169 throws HeadlessException; 170 171 public abstract MenuBarPeer createMenuBar(MenuBar target) 172 throws HeadlessException; 173 174 public abstract MenuPeer createMenu(Menu target) 175 throws HeadlessException; 176 177 public abstract PopupMenuPeer createPopupMenu(PopupMenu target) 178 throws HeadlessException; 179 180 public abstract MenuItemPeer createMenuItem(MenuItem target) 181 throws HeadlessException; 182 183 public abstract CheckboxMenuItemPeer createCheckboxMenuItem( 184 CheckboxMenuItem target) 185 throws HeadlessException; 186 187 public abstract DragSourceContextPeer createDragSourceContextPeer( 188 DragGestureEvent dge) 189 throws InvalidDnDOperationException; 190 191 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 192 throws HeadlessException, AWTException; 193 194 public abstract SystemTrayPeer createSystemTray(SystemTray target); 195 196 public abstract boolean isTraySupported(); 197 198 @SuppressWarnings("deprecation") 199 public abstract FontPeer getFontPeer(String name, int style); 200 201 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen) 202 throws AWTException; 203 204 public abstract KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager) 205 throws HeadlessException; 206 207 /** 208 * The AWT lock is typically only used on Unix platforms to synchronize 209 * access to Xlib, OpenGL, etc. However, these methods are implemented 210 * in SunToolkit so that they can be called from shared code (e.g. 211 * from the OGL pipeline) or from the X11 pipeline regardless of whether 212 * XToolkit or MToolkit is currently in use. There are native macros 213 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 214 * methods is changed, make sure it is compatible with the native macros. 215 * 216 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 217 * used in place of: 218 * synchronized (getAWTLock()) { 219 * ... 220 * } 221 * 222 * By factoring these methods out specially, we are able to change the 223 * implementation of these methods (e.g. use more advanced locking 224 * mechanisms) without impacting calling code. 225 * 226 * Sample usage: 227 * private void doStuffWithXlib() { 228 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 229 * SunToolkit.awtLock(); 230 * try { 231 * ... 232 * XlibWrapper.XDoStuff(); 233 * } finally { 234 * SunToolkit.awtUnlock(); 235 * } 236 * } 237 */ 238 239 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 240 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 241 242 public static final void awtLock() { 243 AWT_LOCK.lock(); 244 } 245 246 public static final boolean awtTryLock() { 247 return AWT_LOCK.tryLock(); 248 } 249 250 public static final void awtUnlock() { 251 AWT_LOCK.unlock(); 252 } 253 254 public static final void awtLockWait() 255 throws InterruptedException 256 { 257 AWT_LOCK_COND.await(); 258 } 259 260 public static final void awtLockWait(long timeout) 261 throws InterruptedException 262 { 263 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 264 } 265 266 public static final void awtLockNotify() { 267 AWT_LOCK_COND.signal(); 268 } 269 270 public static final void awtLockNotifyAll() { 271 AWT_LOCK_COND.signalAll(); 272 } 273 274 public static final boolean isAWTLockHeldByCurrentThread() { 275 return AWT_LOCK.isHeldByCurrentThread(); 276 } 277 278 /* 279 * Create a new AppContext, along with its EventQueue, for a 280 * new ThreadGroup. Browser code, for example, would use this 281 * method to create an AppContext & EventQueue for an Applet. 282 */ 283 public static AppContext createNewAppContext() { 284 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 285 // Create appContext before initialization of EventQueue, so all 286 // the calls to AppContext.getAppContext() from EventQueue ctor 287 // return correct values 288 AppContext appContext = new AppContext(threadGroup); 289 290 initEQ(appContext); 291 292 return appContext; 293 } 294 295 public static Field getField(final Class<?> klass, final String fieldName) { 296 return AccessController.doPrivileged(new PrivilegedAction<Field>() { 297 public Field run() { 298 try { 299 Field field = klass.getDeclaredField(fieldName); 300 assert (field != null); 301 field.setAccessible(true); 302 return field; 303 } catch (SecurityException e) { 304 assert false; 305 } catch (NoSuchFieldException e) { 306 assert false; 307 } 308 return null; 309 }//run 310 }); 311 } 312 313 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 314 if (wakeupMethod == null){ 315 wakeupMethod = AccessController.doPrivileged(new PrivilegedAction<Method>() { 316 public Method run() { 317 try { 318 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} ); 319 if (method != null) { 320 method.setAccessible(true); 321 } 322 return method; 323 } catch (NoSuchMethodException e) { 324 assert false; 325 } catch (SecurityException e) { 326 assert false; 327 } 328 return null; 329 }//run 330 }); 331 } 332 try{ 333 if (wakeupMethod != null){ 334 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)}); 335 } 336 } catch (InvocationTargetException e){ 337 assert false; 338 } catch (IllegalAccessException e) { 339 assert false; 340 } 341 } 342 343 /* 344 * Fetch the peer associated with the given target (as specified 345 * in the peer creation method). This can be used to determine 346 * things like what the parent peer is. If the target is null 347 * or the target can't be found (either because the a peer was 348 * never created for it or the peer was disposed), a null will 349 * be returned. 350 */ 351 protected static Object targetToPeer(Object target) { 352 if (target != null && !GraphicsEnvironment.isHeadless()) { 353 return AWTAutoShutdown.getInstance().getPeer(target); 354 } 355 return null; 356 } 357 358 protected static void targetCreatedPeer(Object target, Object peer) { 359 if (target != null && peer != null && 360 !GraphicsEnvironment.isHeadless()) 361 { 362 AWTAutoShutdown.getInstance().registerPeer(target, peer); 363 } 364 } 365 366 protected static void targetDisposedPeer(Object target, Object peer) { 367 if (target != null && peer != null && 368 !GraphicsEnvironment.isHeadless()) 369 { 370 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 371 } 372 } 373 374 // Maps from non-Component/MenuComponent to AppContext. 375 // WeakHashMap<Component,AppContext> 376 private static final Map<Object, AppContext> appContextMap = 377 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>()); 378 379 /** 380 * Sets the appContext field of target. If target is not a Component or 381 * MenuComponent, this returns false. 382 */ 383 private static boolean setAppContext(Object target, 384 AppContext context) { 385 if (target instanceof Component) { 386 AWTAccessor.getComponentAccessor(). 387 setAppContext((Component)target, context); 388 } else if (target instanceof MenuComponent) { 389 AWTAccessor.getMenuComponentAccessor(). 390 setAppContext((MenuComponent)target, context); 391 } else { 392 return false; 393 } 394 return true; 395 } 396 397 /** 398 * Returns the appContext field for target. If target is not a 399 * Component or MenuComponent this returns null. 400 */ 401 private static AppContext getAppContext(Object target) { 402 if (target instanceof Component) { 403 return AWTAccessor.getComponentAccessor(). 404 getAppContext((Component)target); 405 } else if (target instanceof MenuComponent) { 406 return AWTAccessor.getMenuComponentAccessor(). 407 getAppContext((MenuComponent)target); 408 } else { 409 return null; 410 } 411 } 412 413 /* 414 * Fetch the AppContext associated with the given target. 415 * This can be used to determine things like which EventQueue 416 * to use for posting events to a Component. If the target is 417 * null or the target can't be found, a null with be returned. 418 */ 419 public static AppContext targetToAppContext(Object target) { 420 if (target == null || GraphicsEnvironment.isHeadless()) { 421 return null; 422 } 423 AppContext context = getAppContext(target); 424 if (context == null) { 425 // target is not a Component/MenuComponent, try the 426 // appContextMap. 427 context = appContextMap.get(target); 428 } 429 return context; 430 } 431 432 /** 433 * Sets the synchronous status of focus requests on lightweight 434 * components in the specified window to the specified value. 435 * If the boolean parameter is <code>true</code> then the focus 436 * requests on lightweight components will be performed 437 * synchronously, if it is <code>false</code>, then asynchronously. 438 * By default, all windows have their lightweight request status 439 * set to asynchronous. 440 * <p> 441 * The application can only set the status of lightweight focus 442 * requests to synchronous for any of its windows if it doesn't 443 * perform focus transfers between different heavyweight containers. 444 * In this case the observable focus behaviour is the same as with 445 * asynchronous status. 446 * <p> 447 * If the application performs focus transfer between different 448 * heavyweight containers and sets the lightweight focus request 449 * status to synchronous for any of its windows, then further focus 450 * behaviour is unspecified. 451 * <p> 452 * @param w window for which the lightweight focus request status 453 * should be set 454 * @param status the value of lightweight focus request status 455 */ 456 457 public static void setLWRequestStatus(Window changed,boolean status){ 458 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 459 }; 460 461 public static void checkAndSetPolicy(Container cont, boolean isSwingCont) 462 { 463 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager 464 .getCurrentKeyboardFocusManager().getDefaultFocusTraversalPolicy(); 465 466 String toolkitName = Toolkit.getDefaultToolkit().getClass().getName(); 467 // if this is not XAWT then use default policy 468 // because Swing change it 469 if (!"sun.awt.X11.XToolkit".equals(toolkitName)) { 470 cont.setFocusTraversalPolicy(defaultPolicy); 471 return; 472 } 473 474 String policyName = defaultPolicy.getClass().getName(); 475 476 if (DefaultFocusTraversalPolicy.class != defaultPolicy.getClass()) { 477 // Policy was changed 478 // Check if it is awt policy or swing policy 479 // If it is Swing policy we shouldn't use it in AWT frames 480 // If it is AWT policy we shouldn't use it in Swing frames 481 // Otherwise we should use this policy 482 if (policyName.startsWith("java.awt.")) { 483 // AWT 484 if (isSwingCont) { 485 // Can't use AWT policy in Swing windows - should use Swing's one. 486 defaultPolicy = createLayoutPolicy(); 487 } else { 488 // New awt policy. 489 } 490 } else if (policyName.startsWith("javax.swing.")) { 491 if (isSwingCont) { 492 // New Swing's policy 493 } else { 494 defaultPolicy = new DefaultFocusTraversalPolicy(); 495 } 496 } 497 } else { 498 // Policy is default, use different default policy for swing 499 if (isSwingCont) { 500 defaultPolicy = createLayoutPolicy(); 501 } 502 } 503 cont.setFocusTraversalPolicy(defaultPolicy); 504 } 505 506 private static FocusTraversalPolicy createLayoutPolicy() { 507 FocusTraversalPolicy policy = null; 508 try { 509 Class<?> layoutPolicyClass = 510 Class.forName("javax.swing.LayoutFocusTraversalPolicy"); 511 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance(); 512 } 513 catch (ClassNotFoundException e) { 514 assert false; 515 } 516 catch (InstantiationException e) { 517 assert false; 518 } 519 catch (IllegalAccessException e) { 520 assert false; 521 } 522 523 return policy; 524 } 525 526 /* 527 * Insert a mapping from target to AppContext, for later retrieval 528 * via targetToAppContext() above. 529 */ 530 public static void insertTargetMapping(Object target, AppContext appContext) { 531 if (!GraphicsEnvironment.isHeadless()) { 532 if (!setAppContext(target, appContext)) { 533 // Target is not a Component/MenuComponent, use the private Map 534 // instead. 535 appContextMap.put(target, appContext); 536 } 537 } 538 } 539 540 /* 541 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 542 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 543 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 544 * not be called under another lock since it locks the EventQueue. 545 * See bugids 4632918, 4526597. 546 */ 547 public static void postEvent(AppContext appContext, AWTEvent event) { 548 if (event == null) { 549 throw new NullPointerException(); 550 } 551 // All events posted via this method are system-generated. 552 // Placing the following call here reduces considerably the 553 // number of places throughout the toolkit that would 554 // otherwise have to be modified to precisely identify 555 // system-generated events. 556 setSystemGenerated(event); 557 AppContext eventContext = targetToAppContext(event.getSource()); 558 if (eventContext != null && !eventContext.equals(appContext)) { 559 log.fine("Event posted on wrong app context : " + event); 560 } 561 PostEventQueue postEventQueue = 562 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 563 if (postEventQueue != null) { 564 postEventQueue.postEvent(event); 565 } 566 } 567 568 /* 569 * Post AWTEvent of high priority. 570 */ 571 public static void postPriorityEvent(final AWTEvent e) { 572 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 573 public void run() { 574 AWTAccessor.getAWTEventAccessor().setPosted(e); 575 ((Component)e.getSource()).dispatchEvent(e); 576 } 577 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 578 postEvent(targetToAppContext(e.getSource()), pe); 579 } 580 581 private static final Lock flushLock = new ReentrantLock(); 582 private static boolean isFlushingPendingEvents = false; 583 584 /* 585 * Flush any pending events which haven't been posted to the AWT 586 * EventQueue yet. 587 */ 588 public static void flushPendingEvents() { 589 flushLock.lock(); 590 try { 591 // Don't call flushPendingEvents() recursively 592 if (!isFlushingPendingEvents) { 593 isFlushingPendingEvents = true; 594 AppContext appContext = AppContext.getAppContext(); 595 PostEventQueue postEventQueue = 596 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 597 if (postEventQueue != null) { 598 postEventQueue.flush(); 599 } 600 } 601 } finally { 602 isFlushingPendingEvents = false; 603 flushLock.unlock(); 604 } 605 } 606 607 public static boolean isPostEventQueueEmpty() { 608 AppContext appContext = AppContext.getAppContext(); 609 PostEventQueue postEventQueue = 610 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 611 if (postEventQueue != null) { 612 return postEventQueue.noEvents(); 613 } else { 614 return true; 615 } 616 } 617 618 /* 619 * Execute a chunk of code on the Java event handler thread for the 620 * given target. Does not wait for the execution to occur before 621 * returning to the caller. 622 */ 623 public static void executeOnEventHandlerThread(Object target, 624 Runnable runnable) { 625 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 626 } 627 628 /* 629 * Fixed 5064013: the InvocationEvent time should be equals 630 * the time of the ActionEvent 631 */ 632 @SuppressWarnings("serial") 633 public static void executeOnEventHandlerThread(Object target, 634 Runnable runnable, 635 final long when) { 636 executeOnEventHandlerThread( 637 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 638 public long getWhen() { 639 return when; 640 } 641 }); 642 } 643 644 /* 645 * Execute a chunk of code on the Java event handler thread for the 646 * given target. Does not wait for the execution to occur before 647 * returning to the caller. 648 */ 649 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 650 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 651 } 652 653 /* 654 * Execute a chunk of code on the Java event handler thread. The 655 * method takes into account provided AppContext and sets 656 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the 657 * event. See 6451487 for detailes. 658 * Does not wait for the execution to occur before returning to 659 * the caller. 660 */ 661 public static void invokeLaterOnAppContext( 662 AppContext appContext, Runnable dispatcher) 663 { 664 postEvent(appContext, 665 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 666 PeerEvent.PRIORITY_EVENT)); 667 } 668 669 /* 670 * Execute a chunk of code on the Java event handler thread for the 671 * given target. Waits for the execution to occur before returning 672 * to the caller. 673 */ 674 public static void executeOnEDTAndWait(Object target, Runnable runnable) 675 throws InterruptedException, InvocationTargetException 676 { 677 if (EventQueue.isDispatchThread()) { 678 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 679 } 680 681 class AWTInvocationLock {} 682 Object lock = new AWTInvocationLock(); 683 684 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 685 686 synchronized (lock) { 687 executeOnEventHandlerThread(event); 688 while(!event.isDispatched()) { 689 lock.wait(); 690 } 691 } 692 693 Throwable eventThrowable = event.getThrowable(); 694 if (eventThrowable != null) { 695 throw new InvocationTargetException(eventThrowable); 696 } 697 } 698 699 /* 700 * Returns true if the calling thread is the event dispatch thread 701 * contained within AppContext which associated with the given target. 702 * Use this call to ensure that a given task is being executed 703 * (or not being) on the event dispatch thread for the given target. 704 */ 705 public static boolean isDispatchThreadForAppContext(Object target) { 706 AppContext appContext = targetToAppContext(target); 707 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 708 709 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 710 return accessor.isDispatchThreadImpl(eq); 711 } 712 713 public Dimension getScreenSize() { 714 return new Dimension(getScreenWidth(), getScreenHeight()); 715 } 716 protected abstract int getScreenWidth(); 717 protected abstract int getScreenHeight(); 718 719 @SuppressWarnings("deprecation") 720 public FontMetrics getFontMetrics(Font font) { 721 return FontDesignMetrics.getMetrics(font); 722 } 723 724 @SuppressWarnings("deprecation") 725 public String[] getFontList() { 726 String[] hardwiredFontList = { 727 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 728 Font.DIALOG_INPUT 729 730 // -- Obsolete font names from 1.0.2. It was decided that 731 // -- getFontList should not return these old names: 732 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 733 }; 734 return hardwiredFontList; 735 } 736 737 public PanelPeer createPanel(Panel target) { 738 return (PanelPeer)createComponent(target); 739 } 740 741 public CanvasPeer createCanvas(Canvas target) { 742 return (CanvasPeer)createComponent(target); 743 } 744 745 /** 746 * Disables erasing of background on the canvas before painting if 747 * this is supported by the current toolkit. It is recommended to 748 * call this method early, before the Canvas becomes displayable, 749 * because some Toolkit implementations do not support changing 750 * this property once the Canvas becomes displayable. 751 */ 752 public void disableBackgroundErase(Canvas canvas) { 753 disableBackgroundEraseImpl(canvas); 754 } 755 756 /** 757 * Disables the native erasing of the background on the given 758 * component before painting if this is supported by the current 759 * toolkit. This only has an effect for certain components such as 760 * Canvas, Panel and Window. It is recommended to call this method 761 * early, before the Component becomes displayable, because some 762 * Toolkit implementations do not support changing this property 763 * once the Component becomes displayable. 764 */ 765 public void disableBackgroundErase(Component component) { 766 disableBackgroundEraseImpl(component); 767 } 768 769 private void disableBackgroundEraseImpl(Component component) { 770 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 771 } 772 773 /** 774 * Returns the value of "sun.awt.noerasebackground" property. Default 775 * value is {@code false}. 776 */ 777 public static boolean getSunAwtNoerasebackground() { 778 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 779 } 780 781 /** 782 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 783 * value is {@code false}. 784 */ 785 public static boolean getSunAwtErasebackgroundonresize() { 786 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 787 } 788 789 790 static final SoftCache imgCache = new SoftCache(); 791 792 static Image getImageFromHash(Toolkit tk, URL url) { 793 SecurityManager sm = System.getSecurityManager(); 794 if (sm != null) { 795 try { 796 java.security.Permission perm = 797 url.openConnection().getPermission(); 798 if (perm != null) { 799 try { 800 sm.checkPermission(perm); 801 } catch (SecurityException se) { 802 // fallback to checkRead/checkConnect for pre 1.2 803 // security managers 804 if ((perm instanceof java.io.FilePermission) && 805 perm.getActions().indexOf("read") != -1) { 806 sm.checkRead(perm.getName()); 807 } else if ((perm instanceof 808 java.net.SocketPermission) && 809 perm.getActions().indexOf("connect") != -1) { 810 sm.checkConnect(url.getHost(), url.getPort()); 811 } else { 812 throw se; 813 } 814 } 815 } 816 } catch (java.io.IOException ioe) { 817 sm.checkConnect(url.getHost(), url.getPort()); 818 } 819 } 820 synchronized (imgCache) { 821 Image img = (Image)imgCache.get(url); 822 if (img == null) { 823 try { 824 img = tk.createImage(new URLImageSource(url)); 825 imgCache.put(url, img); 826 } catch (Exception e) { 827 } 828 } 829 return img; 830 } 831 } 832 833 static Image getImageFromHash(Toolkit tk, 834 String filename) { 835 SecurityManager security = System.getSecurityManager(); 836 if (security != null) { 837 security.checkRead(filename); 838 } 839 synchronized (imgCache) { 840 Image img = (Image)imgCache.get(filename); 841 if (img == null) { 842 try { 843 img = tk.createImage(new FileImageSource(filename)); 844 imgCache.put(filename, img); 845 } catch (Exception e) { 846 } 847 } 848 return img; 849 } 850 } 851 852 public Image getImage(String filename) { 853 return getImageFromHash(this, filename); 854 } 855 856 public Image getImage(URL url) { 857 return getImageFromHash(this, url); 858 } 859 860 public Image createImage(String filename) { 861 SecurityManager security = System.getSecurityManager(); 862 if (security != null) { 863 security.checkRead(filename); 864 } 865 return createImage(new FileImageSource(filename)); 866 } 867 868 public Image createImage(URL url) { 869 SecurityManager sm = System.getSecurityManager(); 870 if (sm != null) { 871 try { 872 java.security.Permission perm = 873 url.openConnection().getPermission(); 874 if (perm != null) { 875 try { 876 sm.checkPermission(perm); 877 } catch (SecurityException se) { 878 // fallback to checkRead/checkConnect for pre 1.2 879 // security managers 880 if ((perm instanceof java.io.FilePermission) && 881 perm.getActions().indexOf("read") != -1) { 882 sm.checkRead(perm.getName()); 883 } else if ((perm instanceof 884 java.net.SocketPermission) && 885 perm.getActions().indexOf("connect") != -1) { 886 sm.checkConnect(url.getHost(), url.getPort()); 887 } else { 888 throw se; 889 } 890 } 891 } 892 } catch (java.io.IOException ioe) { 893 sm.checkConnect(url.getHost(), url.getPort()); 894 } 895 } 896 return createImage(new URLImageSource(url)); 897 } 898 899 public Image createImage(byte[] data, int offset, int length) { 900 return createImage(new ByteArrayImageSource(data, offset, length)); 901 } 902 903 public Image createImage(ImageProducer producer) { 904 return new ToolkitImage(producer); 905 } 906 907 public int checkImage(Image img, int w, int h, ImageObserver o) { 908 if (!(img instanceof ToolkitImage)) { 909 return ImageObserver.ALLBITS; 910 } 911 912 ToolkitImage tkimg = (ToolkitImage)img; 913 int repbits; 914 if (w == 0 || h == 0) { 915 repbits = ImageObserver.ALLBITS; 916 } else { 917 repbits = tkimg.getImageRep().check(o); 918 } 919 return tkimg.check(o) | repbits; 920 } 921 922 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 923 if (w == 0 || h == 0) { 924 return true; 925 } 926 927 // Must be a ToolkitImage 928 if (!(img instanceof ToolkitImage)) { 929 return true; 930 } 931 932 ToolkitImage tkimg = (ToolkitImage)img; 933 if (tkimg.hasError()) { 934 if (o != null) { 935 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 936 -1, -1, -1, -1); 937 } 938 return false; 939 } 940 ImageRepresentation ir = tkimg.getImageRep(); 941 return ir.prepare(o); 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 if (log.isLoggable(PlatformLogger.FINER)) { 966 log.finer("SunToolkit.getScaledIconImage: " + 967 "Skipping the image passed into Java because it's null."); 968 } 969 continue; 970 } 971 if (im instanceof ToolkitImage) { 972 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 973 ir.reconstruct(ImageObserver.ALLBITS); 974 } 975 int iw; 976 int ih; 977 try { 978 iw = im.getWidth(null); 979 ih = im.getHeight(null); 980 } catch (Exception e){ 981 if (log.isLoggable(PlatformLogger.FINER)) { 982 log.finer("SunToolkit.getScaledIconImage: " + 983 "Perhaps the image passed into Java is broken. Skipping this icon."); 984 } 985 continue; 986 } 987 if (iw > 0 && ih > 0) { 988 //Calc scale factor 989 double scaleFactor = Math.min((double)width / (double)iw, 990 (double)height / (double)ih); 991 //Calculate scaled image dimensions 992 //adjusting scale factor to nearest "good" value 993 int adjw = 0; 994 int adjh = 0; 995 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 996 if (scaleFactor >= 2) { 997 //Need to enlarge image more than twice 998 //Round down scale factor to multiply by integer value 999 scaleFactor = Math.floor(scaleFactor); 1000 adjw = iw * (int)scaleFactor; 1001 adjh = ih * (int)scaleFactor; 1002 scaleMeasure = 1.0 - 0.5 / scaleFactor; 1003 } else if (scaleFactor >= 1) { 1004 //Don't scale 1005 scaleFactor = 1.0; 1006 adjw = iw; 1007 adjh = ih; 1008 scaleMeasure = 0; 1009 } else if (scaleFactor >= 0.75) { 1010 //Multiply by 3/4 1011 scaleFactor = 0.75; 1012 adjw = iw * 3 / 4; 1013 adjh = ih * 3 / 4; 1014 scaleMeasure = 0.3; 1015 } else if (scaleFactor >= 0.6666) { 1016 //Multiply by 2/3 1017 scaleFactor = 0.6666; 1018 adjw = iw * 2 / 3; 1019 adjh = ih * 2 / 3; 1020 scaleMeasure = 0.33; 1021 } else { 1022 //Multiply size by 1/scaleDivider 1023 //where scaleDivider is minimum possible integer 1024 //larger than 1/scaleFactor 1025 double scaleDivider = Math.ceil(1.0 / scaleFactor); 1026 scaleFactor = 1.0 / scaleDivider; 1027 adjw = (int)Math.round((double)iw / scaleDivider); 1028 adjh = (int)Math.round((double)ih / scaleDivider); 1029 scaleMeasure = 1.0 - 1.0 / scaleDivider; 1030 } 1031 double similarity = ((double)width - (double)adjw) / (double)width + 1032 ((double)height - (double)adjh) / (double)height + //Large padding is bad 1033 scaleMeasure; //Large rescale is bad 1034 if (similarity < bestSimilarity) { 1035 bestSimilarity = similarity; 1036 bestScaleFactor = scaleFactor; 1037 bestImage = im; 1038 bestWidth = adjw; 1039 bestHeight = adjh; 1040 } 1041 if (similarity == 0) break; 1042 } 1043 } 1044 if (bestImage == null) { 1045 //No images were found, possibly all are broken 1046 return null; 1047 } 1048 BufferedImage bimage = 1049 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 1050 Graphics2D g = bimage.createGraphics(); 1051 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 1052 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 1053 try { 1054 int x = (width - bestWidth) / 2; 1055 int y = (height - bestHeight) / 2; 1056 if (log.isLoggable(PlatformLogger.FINER)) { 1057 log.finer("WWindowPeer.getScaledIconData() result : " + 1058 "w : " + width + " h : " + height + 1059 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) + 1060 " sim : " + bestSimilarity + " sf : " + bestScaleFactor + 1061 " adjW : " + bestWidth + " adjH : " + bestHeight + 1062 " x : " + x + " y : " + y); 1063 } 1064 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 1065 } finally { 1066 g.dispose(); 1067 } 1068 return bimage; 1069 } 1070 1071 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1072 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1073 if (bimage == null) { 1074 if (log.isLoggable(PlatformLogger.FINER)) { 1075 log.finer("SunToolkit.getScaledIconData: " + 1076 "Perhaps the image passed into Java is broken. Skipping this icon."); 1077 } 1078 return null; 1079 } 1080 Raster raster = bimage.getRaster(); 1081 DataBuffer buffer = raster.getDataBuffer(); 1082 return (DataBufferInt)buffer; 1083 } 1084 1085 protected EventQueue getSystemEventQueueImpl() { 1086 return getSystemEventQueueImplPP(); 1087 } 1088 1089 // Package private implementation 1090 static EventQueue getSystemEventQueueImplPP() { 1091 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1092 } 1093 1094 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1095 EventQueue theEventQueue = 1096 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1097 return theEventQueue; 1098 } 1099 1100 /** 1101 * Give native peers the ability to query the native container 1102 * given a native component (eg the direct parent may be lightweight). 1103 */ 1104 public static Container getNativeContainer(Component c) { 1105 return Toolkit.getNativeContainer(c); 1106 } 1107 1108 /** 1109 * Gives native peers the ability to query the closest HW component. 1110 * If the given component is heavyweight, then it returns this. Otherwise, 1111 * it goes one level up in the hierarchy and tests next component. 1112 */ 1113 public static Component getHeavyweightComponent(Component c) { 1114 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1115 c = AWTAccessor.getComponentAccessor().getParent(c); 1116 } 1117 return c; 1118 } 1119 1120 /** 1121 * Returns a new input method window, with behavior as specified in 1122 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1123 * If the inputContext is not null, the window should return it from its 1124 * getInputContext() method. The window needs to implement 1125 * sun.awt.im.InputMethodWindow. 1126 * <p> 1127 * SunToolkit subclasses can override this method to return better input 1128 * method windows. 1129 */ 1130 public Window createInputMethodWindow(String title, InputContext context) { 1131 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1132 } 1133 1134 /** 1135 * Returns whether enableInputMethods should be set to true for peered 1136 * TextComponent instances on this platform. False by default. 1137 */ 1138 public boolean enableInputMethodsForTextComponent() { 1139 return false; 1140 } 1141 1142 private static Locale startupLocale = null; 1143 1144 /** 1145 * Returns the locale in which the runtime was started. 1146 */ 1147 public static Locale getStartupLocale() { 1148 if (startupLocale == null) { 1149 String language, region, country, variant; 1150 language = AccessController.doPrivileged( 1151 new GetPropertyAction("user.language", "en")); 1152 // for compatibility, check for old user.region property 1153 region = AccessController.doPrivileged( 1154 new GetPropertyAction("user.region")); 1155 if (region != null) { 1156 // region can be of form country, country_variant, or _variant 1157 int i = region.indexOf('_'); 1158 if (i >= 0) { 1159 country = region.substring(0, i); 1160 variant = region.substring(i + 1); 1161 } else { 1162 country = region; 1163 variant = ""; 1164 } 1165 } else { 1166 country = AccessController.doPrivileged( 1167 new GetPropertyAction("user.country", "")); 1168 variant = AccessController.doPrivileged( 1169 new GetPropertyAction("user.variant", "")); 1170 } 1171 startupLocale = new Locale(language, country, variant); 1172 } 1173 return startupLocale; 1174 } 1175 1176 /** 1177 * Returns the default keyboard locale of the underlying operating system 1178 */ 1179 public Locale getDefaultKeyboardLocale() { 1180 return getStartupLocale(); 1181 } 1182 1183 private static String dataTransfererClassName = null; 1184 1185 protected static void setDataTransfererClassName(String className) { 1186 dataTransfererClassName = className; 1187 } 1188 1189 public static String getDataTransfererClassName() { 1190 if (dataTransfererClassName == null) { 1191 Toolkit.getDefaultToolkit(); // transferer set during toolkit init 1192 } 1193 return dataTransfererClassName; 1194 } 1195 1196 // Support for window closing event notifications 1197 private transient WindowClosingListener windowClosingListener = null; 1198 /** 1199 * @see sun.awt.WindowClosingSupport#getWindowClosingListener 1200 */ 1201 public WindowClosingListener getWindowClosingListener() { 1202 return windowClosingListener; 1203 } 1204 /** 1205 * @see sun.awt.WindowClosingSupport#setWindowClosingListener 1206 */ 1207 public void setWindowClosingListener(WindowClosingListener wcl) { 1208 windowClosingListener = wcl; 1209 } 1210 1211 /** 1212 * @see sun.awt.WindowClosingListener#windowClosingNotify 1213 */ 1214 public RuntimeException windowClosingNotify(WindowEvent event) { 1215 if (windowClosingListener != null) { 1216 return windowClosingListener.windowClosingNotify(event); 1217 } else { 1218 return null; 1219 } 1220 } 1221 /** 1222 * @see sun.awt.WindowClosingListener#windowClosingDelivered 1223 */ 1224 public RuntimeException windowClosingDelivered(WindowEvent event) { 1225 if (windowClosingListener != null) { 1226 return windowClosingListener.windowClosingDelivered(event); 1227 } else { 1228 return null; 1229 } 1230 } 1231 1232 private static DefaultMouseInfoPeer mPeer = null; 1233 1234 protected synchronized MouseInfoPeer getMouseInfoPeer() { 1235 if (mPeer == null) { 1236 mPeer = new DefaultMouseInfoPeer(); 1237 } 1238 return mPeer; 1239 } 1240 1241 1242 /** 1243 * Returns whether default toolkit needs the support of the xembed 1244 * from embedding host(if any). 1245 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1246 */ 1247 public static boolean needsXEmbed() { 1248 String noxembed = AccessController. 1249 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1250 if ("true".equals(noxembed)) { 1251 return false; 1252 } 1253 1254 Toolkit tk = Toolkit.getDefaultToolkit(); 1255 if (tk instanceof SunToolkit) { 1256 // SunToolkit descendants should override this method to specify 1257 // concrete behavior 1258 return ((SunToolkit)tk).needsXEmbedImpl(); 1259 } else { 1260 // Non-SunToolkit doubtly might support XEmbed 1261 return false; 1262 } 1263 } 1264 1265 /** 1266 * Returns whether this toolkit needs the support of the xembed 1267 * from embedding host(if any). 1268 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1269 */ 1270 protected boolean needsXEmbedImpl() { 1271 return false; 1272 } 1273 1274 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1275 1276 /** 1277 * Returns whether the XEmbed server feature is requested by 1278 * developer. If true, Toolkit should return an 1279 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1280 */ 1281 protected final boolean isXEmbedServerRequested() { 1282 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1283 } 1284 1285 /** 1286 * Returns whether the modal exclusion API is supported by the current toolkit. 1287 * When it isn't supported, calling <code>setModalExcluded</code> has no 1288 * effect, and <code>isModalExcluded</code> returns false for all windows. 1289 * 1290 * @return true if modal exclusion is supported by the toolkit, false otherwise 1291 * 1292 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1293 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1294 * 1295 * @since 1.5 1296 */ 1297 public static boolean isModalExcludedSupported() 1298 { 1299 Toolkit tk = Toolkit.getDefaultToolkit(); 1300 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1301 } 1302 /* 1303 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1304 * 1305 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1306 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1307 * 1308 * @since 1.5 1309 */ 1310 protected boolean isModalExcludedSupportedImpl() 1311 { 1312 return false; 1313 } 1314 1315 /* 1316 * Sets this window to be excluded from being modally blocked. When the 1317 * toolkit supports modal exclusion and this method is called, input 1318 * events, focus transfer and z-order will continue to work for the 1319 * window, it's owned windows and child components, even in the 1320 * presence of a modal dialog. 1321 * For details on which <code>Window</code>s are normally blocked 1322 * by modal dialog, see {@link java.awt.Dialog}. 1323 * Invoking this method when the modal exclusion API is not supported by 1324 * the current toolkit has no effect. 1325 * @param window Window to be marked as not modally blocked 1326 * @see java.awt.Dialog 1327 * @see java.awt.Dialog#setModal(boolean) 1328 * @see sun.awt.SunToolkit#isModalExcludedSupported 1329 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1330 */ 1331 public static void setModalExcluded(Window window) 1332 { 1333 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1334 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1335 } 1336 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1337 } 1338 1339 /* 1340 * Returns whether the specified window is blocked by modal dialogs. 1341 * If the modal exclusion API isn't supported by the current toolkit, 1342 * it returns false for all windows. 1343 * 1344 * @param window Window to test for modal exclusion 1345 * 1346 * @return true if the window is modal excluded, false otherwise. If 1347 * the modal exclusion isn't supported by the current Toolkit, false 1348 * is returned 1349 * 1350 * @see sun.awt.SunToolkit#isModalExcludedSupported 1351 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1352 * 1353 * @since 1.5 1354 */ 1355 public static boolean isModalExcluded(Window window) 1356 { 1357 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1358 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1359 } 1360 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1361 } 1362 1363 /** 1364 * Overridden in XToolkit and WToolkit 1365 */ 1366 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1367 return (modalityType == Dialog.ModalityType.MODELESS) || 1368 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1369 } 1370 1371 /** 1372 * Overridden in XToolkit and WToolkit 1373 */ 1374 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1375 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1376 } 1377 1378 /////////////////////////////////////////////////////////////////////////// 1379 // 1380 // The following is used by the Java Plug-in to coordinate dialog modality 1381 // between containing applications (browsers, ActiveX containers etc) and 1382 // the AWT. 1383 // 1384 /////////////////////////////////////////////////////////////////////////// 1385 1386 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1387 1388 public void addModalityListener(ModalityListener listener) { 1389 modalityListeners.add(listener); 1390 } 1391 1392 public void removeModalityListener(ModalityListener listener) { 1393 modalityListeners.remove(listener); 1394 } 1395 1396 public void notifyModalityPushed(Dialog dialog) { 1397 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1398 } 1399 1400 public void notifyModalityPopped(Dialog dialog) { 1401 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1402 } 1403 1404 final void notifyModalityChange(int id, Dialog source) { 1405 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1406 ev.dispatch(); 1407 } 1408 1409 static class ModalityListenerList implements ModalityListener { 1410 1411 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1412 1413 void add(ModalityListener listener) { 1414 listeners.addElement(listener); 1415 } 1416 1417 void remove(ModalityListener listener) { 1418 listeners.removeElement(listener); 1419 } 1420 1421 public void modalityPushed(ModalityEvent ev) { 1422 Iterator<ModalityListener> it = listeners.iterator(); 1423 while (it.hasNext()) { 1424 it.next().modalityPushed(ev); 1425 } 1426 } 1427 1428 public void modalityPopped(ModalityEvent ev) { 1429 Iterator<ModalityListener> it = listeners.iterator(); 1430 while (it.hasNext()) { 1431 it.next().modalityPopped(ev); 1432 } 1433 } 1434 } // end of class ModalityListenerList 1435 1436 /////////////////////////////////////////////////////////////////////////// 1437 // End Plug-in code 1438 /////////////////////////////////////////////////////////////////////////// 1439 1440 public static boolean isLightweightOrUnknown(Component comp) { 1441 if (comp.isLightweight() 1442 || !(getDefaultToolkit() instanceof SunToolkit)) 1443 { 1444 return true; 1445 } 1446 return !(comp instanceof Button 1447 || comp instanceof Canvas 1448 || comp instanceof Checkbox 1449 || comp instanceof Choice 1450 || comp instanceof Label 1451 || comp instanceof java.awt.List 1452 || comp instanceof Panel 1453 || comp instanceof Scrollbar 1454 || comp instanceof ScrollPane 1455 || comp instanceof TextArea 1456 || comp instanceof TextField 1457 || comp instanceof Window); 1458 } 1459 1460 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) { 1461 Method res = null; 1462 try { 1463 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() { 1464 public Method run() throws Exception { 1465 Method m = clz.getDeclaredMethod(methodName, params); 1466 m.setAccessible(true); 1467 return m; 1468 } 1469 }); 1470 } catch (PrivilegedActionException ex) { 1471 ex.printStackTrace(); 1472 } 1473 return res; 1474 } 1475 1476 @SuppressWarnings("serial") 1477 public static class OperationTimedOut extends RuntimeException { 1478 public OperationTimedOut(String msg) { 1479 super(msg); 1480 } 1481 public OperationTimedOut() { 1482 } 1483 } 1484 1485 @SuppressWarnings("serial") 1486 public static class InfiniteLoop extends RuntimeException { 1487 } 1488 1489 @SuppressWarnings("serial") 1490 public static class IllegalThreadException extends RuntimeException { 1491 public IllegalThreadException(String msg) { 1492 super(msg); 1493 } 1494 public IllegalThreadException() { 1495 } 1496 } 1497 1498 public static final int DEFAULT_WAIT_TIME = 10000; 1499 private static final int MAX_ITERS = 20; 1500 private static final int MIN_ITERS = 0; 1501 private static final int MINIMAL_EDELAY = 0; 1502 1503 /** 1504 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1505 */ 1506 public void realSync() throws OperationTimedOut, InfiniteLoop { 1507 realSync(DEFAULT_WAIT_TIME); 1508 } 1509 1510 /** 1511 * Forces toolkit to synchronize with the native windowing 1512 * sub-system, flushing all pending work and waiting for all the 1513 * events to be processed. This method guarantees that after 1514 * return no additional Java events will be generated, unless 1515 * cause by user. Obviously, the method cannot be used on the 1516 * event dispatch thread (EDT). In case it nevertheless gets 1517 * invoked on this thread, the method throws the 1518 * IllegalThreadException runtime exception. 1519 * 1520 * <p> This method allows to write tests without explicit timeouts 1521 * or wait for some event. Example: 1522 * <code> 1523 * Frame f = ...; 1524 * f.setVisible(true); 1525 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1526 * </code> 1527 * 1528 * <p> After realSync, <code>f</code> will be completely visible 1529 * on the screen, its getLocationOnScreen will be returning the 1530 * right result and it will be the focus owner. 1531 * 1532 * <p> Another example: 1533 * <code> 1534 * b.requestFocus(); 1535 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1536 * </code> 1537 * 1538 * <p> After realSync, <code>b</code> will be focus owner. 1539 * 1540 * <p> Notice that realSync isn't guaranteed to work if recurring 1541 * actions occur, such as if during processing of some event 1542 * another request which may generate some events occurs. By 1543 * default, sync tries to perform as much as {@value MAX_ITERS} 1544 * cycles of event processing, allowing for roughly {@value 1545 * MAX_ITERS} additional requests. 1546 * 1547 * <p> For example, requestFocus() generates native request, which 1548 * generates one or two Java focus events, which then generate a 1549 * serie of paint events, a serie of Java focus events, which then 1550 * generate a serie of paint events which then are processed - 1551 * three cycles, minimum. 1552 * 1553 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1554 */ 1555 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1556 { 1557 if (EventQueue.isDispatchThread()) { 1558 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1559 } 1560 int bigLoop = 0; 1561 do { 1562 // Let's do sync first 1563 sync(); 1564 1565 // During the wait process, when we were processing incoming 1566 // events, we could have made some new request, which can 1567 // generate new events. Example: MapNotify/XSetInputFocus. 1568 // Therefore, we dispatch them as long as there is something 1569 // to dispatch. 1570 int iters = 0; 1571 while (iters < MIN_ITERS) { 1572 syncNativeQueue(timeout); 1573 iters++; 1574 } 1575 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1576 iters++; 1577 } 1578 if (iters >= MAX_ITERS) { 1579 throw new InfiniteLoop(); 1580 } 1581 1582 // native requests were dispatched by X/Window Manager or Windows 1583 // Moreover, we processed them all on Toolkit thread 1584 // Now wait while EDT processes them. 1585 // 1586 // During processing of some events (focus, for example), 1587 // some other events could have been generated. So, after 1588 // waitForIdle, we may end up with full EventQueue 1589 iters = 0; 1590 while (iters < MIN_ITERS) { 1591 waitForIdle(timeout); 1592 iters++; 1593 } 1594 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1595 iters++; 1596 } 1597 if (iters >= MAX_ITERS) { 1598 throw new InfiniteLoop(); 1599 } 1600 1601 bigLoop++; 1602 // Again, for Java events, it was simple to check for new Java 1603 // events by checking event queue, but what if Java events 1604 // resulted in native requests? Therefor, check native events again. 1605 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1606 } 1607 1608 /** 1609 * Platform toolkits need to implement this method to perform the 1610 * sync of the native queue. The method should wait until native 1611 * requests are processed, all native events are processed and 1612 * corresponding Java events are generated. Should return 1613 * <code>true</code> if some events were processed, 1614 * <code>false</code> otherwise. 1615 */ 1616 protected abstract boolean syncNativeQueue(final long timeout); 1617 1618 private boolean eventDispatched = false; 1619 private boolean queueEmpty = false; 1620 private final Object waitLock = "Wait Lock"; 1621 1622 static Method eqNoEvents; 1623 1624 private boolean isEQEmpty() { 1625 EventQueue queue = getSystemEventQueueImpl(); 1626 synchronized(SunToolkit.class) { 1627 if (eqNoEvents == null) { 1628 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null); 1629 } 1630 } 1631 try { 1632 return (Boolean)eqNoEvents.invoke(queue); 1633 } catch (Exception e) { 1634 e.printStackTrace(); 1635 return false; 1636 } 1637 } 1638 1639 /** 1640 * Waits for the Java event queue to empty. Ensures that all 1641 * events are processed (including paint events), and that if 1642 * recursive events were generated, they are also processed. 1643 * Should return <code>true</code> if more processing is 1644 * necessary, <code>false</code> otherwise. 1645 */ 1646 @SuppressWarnings("serial") 1647 protected final boolean waitForIdle(final long timeout) { 1648 flushPendingEvents(); 1649 boolean queueWasEmpty = isEQEmpty(); 1650 queueEmpty = false; 1651 eventDispatched = false; 1652 synchronized(waitLock) { 1653 postEvent(AppContext.getAppContext(), 1654 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1655 public void dispatch() { 1656 // Here we block EDT. It could have some 1657 // events, it should have dispatched them by 1658 // now. So native requests could have been 1659 // generated. First, dispatch them. Then, 1660 // flush Java events again. 1661 int iters = 0; 1662 while (iters < MIN_ITERS) { 1663 syncNativeQueue(timeout); 1664 iters++; 1665 } 1666 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1667 iters++; 1668 } 1669 flushPendingEvents(); 1670 1671 synchronized(waitLock) { 1672 queueEmpty = isEQEmpty(); 1673 eventDispatched = true; 1674 waitLock.notifyAll(); 1675 } 1676 } 1677 }); 1678 try { 1679 while (!eventDispatched) { 1680 waitLock.wait(); 1681 } 1682 } catch (InterruptedException ie) { 1683 return false; 1684 } 1685 } 1686 1687 try { 1688 Thread.sleep(MINIMAL_EDELAY); 1689 } catch (InterruptedException ie) { 1690 throw new RuntimeException("Interrupted"); 1691 } 1692 1693 flushPendingEvents(); 1694 1695 // Lock to force write-cache flush for queueEmpty. 1696 synchronized (waitLock) { 1697 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1698 } 1699 } 1700 1701 /** 1702 * Grabs the mouse input for the given window. The window must be 1703 * visible. The window or its children do not receive any 1704 * additional mouse events besides those targeted to them. All 1705 * other events will be dispatched as before - to the respective 1706 * targets. This Window will receive UngrabEvent when automatic 1707 * ungrab is about to happen. The event can be listened to by 1708 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1709 * UngrabEvent class for the list of conditions when ungrab is 1710 * about to happen. 1711 * @see UngrabEvent 1712 */ 1713 public abstract void grab(Window w); 1714 1715 /** 1716 * Forces ungrab. No event will be sent. 1717 */ 1718 public abstract void ungrab(Window w); 1719 1720 1721 /** 1722 * Locates the splash screen library in a platform dependent way and closes 1723 * the splash screen. Should be invoked on first top-level frame display. 1724 * @see java.awt.SplashScreen 1725 * @since 1.6 1726 */ 1727 public static native void closeSplashScreen(); 1728 1729 /* The following methods and variables are to support retrieving 1730 * desktop text anti-aliasing settings 1731 */ 1732 1733 /* Need an instance method because setDesktopProperty(..) is protected. */ 1734 private void fireDesktopFontPropertyChanges() { 1735 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1736 SunToolkit.getDesktopFontHints()); 1737 } 1738 1739 private static boolean checkedSystemAAFontSettings; 1740 private static boolean useSystemAAFontSettings; 1741 private static boolean lastExtraCondition = true; 1742 private static RenderingHints desktopFontHints; 1743 1744 /* Since Swing is the reason for this "extra condition" logic its 1745 * worth documenting it in some detail. 1746 * First, a goal is for Swing and applications to both retrieve and 1747 * use the same desktop property value so that there is complete 1748 * consistency between the settings used by JDK's Swing implementation 1749 * and 3rd party custom Swing components, custom L&Fs and any general 1750 * text rendering that wants to be consistent with these. 1751 * But by default on Solaris & Linux Swing will not use AA text over 1752 * remote X11 display (unless Xrender can be used which is TBD and may not 1753 * always be available anyway) as that is a noticeable performance hit. 1754 * So there needs to be a way to express that extra condition so that 1755 * it is seen by all clients of the desktop property API. 1756 * If this were the only condition it could be handled here as it would 1757 * be the same for any L&F and could reasonably be considered to be 1758 * a static behaviour of those systems. 1759 * But GTK currently has an additional test based on locale which is 1760 * not applied by Metal. So mixing GTK in a few locales with Metal 1761 * would mean the last one wins. 1762 * This could be stored per-app context which would work 1763 * for different applets, but wouldn't help for a single application 1764 * using GTK and some other L&F concurrently. 1765 * But it is expected this will be addressed within GTK and the font 1766 * system so is a temporary and somewhat unlikely harmless corner case. 1767 */ 1768 public static void setAAFontSettingsCondition(boolean extraCondition) { 1769 if (extraCondition != lastExtraCondition) { 1770 lastExtraCondition = extraCondition; 1771 if (checkedSystemAAFontSettings) { 1772 /* Someone already asked for this info, under a different 1773 * condition. 1774 * We'll force re-evaluation instead of replicating the 1775 * logic, then notify any listeners of any change. 1776 */ 1777 checkedSystemAAFontSettings = false; 1778 Toolkit tk = Toolkit.getDefaultToolkit(); 1779 if (tk instanceof SunToolkit) { 1780 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1781 } 1782 } 1783 } 1784 } 1785 1786 /* "false", "off", ""default" aren't explicitly tested, they 1787 * just fall through to produce a null return which all are equated to 1788 * "false". 1789 */ 1790 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1791 Object aaHint = null; 1792 hintname = hintname.toLowerCase(Locale.ENGLISH); 1793 if (hintname.equals("on")) { 1794 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1795 } else if (hintname.equals("gasp")) { 1796 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1797 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1798 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1799 } else if (hintname.equals("lcd_hbgr")) { 1800 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1801 } else if (hintname.equals("lcd_vrgb")) { 1802 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1803 } else if (hintname.equals("lcd_vbgr")) { 1804 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1805 } 1806 if (aaHint != null) { 1807 RenderingHints map = new RenderingHints(null); 1808 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1809 return map; 1810 } else { 1811 return null; 1812 } 1813 } 1814 1815 /* This method determines whether to use the system font settings, 1816 * or ignore them if a L&F has specified they should be ignored, or 1817 * to override both of these with a system property specified value. 1818 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1819 * system property isn't applied as desktop properties are considered 1820 * to be inapplicable in that case. In that headless case although 1821 * this method will return "true" the toolkit will return a null map. 1822 */ 1823 private static boolean useSystemAAFontSettings() { 1824 if (!checkedSystemAAFontSettings) { 1825 useSystemAAFontSettings = true; /* initially set this true */ 1826 String systemAAFonts = null; 1827 Toolkit tk = Toolkit.getDefaultToolkit(); 1828 if (tk instanceof SunToolkit) { 1829 systemAAFonts = 1830 AccessController.doPrivileged( 1831 new GetPropertyAction("awt.useSystemAAFontSettings")); 1832 } 1833 if (systemAAFonts != null) { 1834 useSystemAAFontSettings = 1835 Boolean.valueOf(systemAAFonts).booleanValue(); 1836 /* If it is anything other than "true", then it may be 1837 * a hint name , or it may be "off, "default", etc. 1838 */ 1839 if (!useSystemAAFontSettings) { 1840 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1841 } 1842 } 1843 /* If its still true, apply the extra condition */ 1844 if (useSystemAAFontSettings) { 1845 useSystemAAFontSettings = lastExtraCondition; 1846 } 1847 checkedSystemAAFontSettings = true; 1848 } 1849 return useSystemAAFontSettings; 1850 } 1851 1852 /* A variable defined for the convenience of JDK code */ 1853 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1854 1855 /* Overridden by subclasses to return platform/desktop specific values */ 1856 protected RenderingHints getDesktopAAHints() { 1857 return null; 1858 } 1859 1860 /* Subclass desktop property loading methods call this which 1861 * in turn calls the appropriate subclass implementation of 1862 * getDesktopAAHints() when system settings are being used. 1863 * Its public rather than protected because subclasses may delegate 1864 * to a helper class. 1865 */ 1866 public static RenderingHints getDesktopFontHints() { 1867 if (useSystemAAFontSettings()) { 1868 Toolkit tk = Toolkit.getDefaultToolkit(); 1869 if (tk instanceof SunToolkit) { 1870 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1871 return (RenderingHints)map; 1872 } else { /* Headless Toolkit */ 1873 return null; 1874 } 1875 } else if (desktopFontHints != null) { 1876 /* cloning not necessary as the return value is cloned later, but 1877 * its harmless. 1878 */ 1879 return (RenderingHints)(desktopFontHints.clone()); 1880 } else { 1881 return null; 1882 } 1883 } 1884 1885 1886 public abstract boolean isDesktopSupported(); 1887 1888 /* 1889 * consumeNextKeyTyped() method is not currently used, 1890 * however Swing could use it in the future. 1891 */ 1892 private static Method consumeNextKeyTypedMethod = null; 1893 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1894 if (consumeNextKeyTypedMethod == null) { 1895 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class, 1896 "consumeNextKeyTyped", 1897 new Class<?>[] {KeyEvent.class}); 1898 } 1899 try { 1900 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(), 1901 keyEvent); 1902 } catch (IllegalAccessException iae) { 1903 iae.printStackTrace(); 1904 } catch (InvocationTargetException ite) { 1905 ite.printStackTrace(); 1906 } 1907 } 1908 1909 protected static void dumpPeers(final PlatformLogger aLog) { 1910 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1911 } 1912 1913 /** 1914 * Returns the <code>Window</code> ancestor of the component <code>comp</code>. 1915 * @return Window ancestor of the component or component by itself if it is Window; 1916 * null, if component is not a part of window hierarchy 1917 */ 1918 public static Window getContainingWindow(Component comp) { 1919 while (comp != null && !(comp instanceof Window)) { 1920 comp = comp.getParent(); 1921 } 1922 return (Window)comp; 1923 } 1924 1925 /** 1926 * Returns the value of the system property indicated by the specified key. 1927 */ 1928 public static String getSystemProperty(final String key) { 1929 return AccessController.doPrivileged(new PrivilegedAction<String>() { 1930 public String run() { 1931 return System.getProperty(key); 1932 } 1933 }); 1934 } 1935 1936 /** 1937 * Returns the boolean value of the system property indicated by the specified key. 1938 */ 1939 protected static Boolean getBooleanSystemProperty(String key) { 1940 return AccessController.doPrivileged(new GetBooleanAction(key)); 1941 } 1942 1943 private static Boolean sunAwtDisableMixing = null; 1944 1945 /** 1946 * Returns the value of "sun.awt.disableMixing" property. Default 1947 * value is {@code false}. 1948 */ 1949 public synchronized static boolean getSunAwtDisableMixing() { 1950 if (sunAwtDisableMixing == null) { 1951 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing"); 1952 } 1953 return sunAwtDisableMixing.booleanValue(); 1954 } 1955 1956 /** 1957 * Returns true if the native GTK libraries are available. The 1958 * default implementation returns false, but UNIXToolkit overrides this 1959 * method to provide a more specific answer. 1960 */ 1961 public boolean isNativeGTKAvailable() { 1962 return false; 1963 } 1964 1965 // Cosntant alpha 1966 public boolean isWindowOpacitySupported() { 1967 return false; 1968 } 1969 1970 // Shaping 1971 public boolean isWindowShapingSupported() { 1972 return false; 1973 } 1974 1975 // Per-pixel alpha 1976 public boolean isWindowTranslucencySupported() { 1977 return false; 1978 } 1979 1980 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1981 return false; 1982 } 1983 1984 /** 1985 * Returns whether or not a containing top level window for the passed 1986 * component is 1987 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1988 * 1989 * @param c a Component which toplevel's to check 1990 * @return {@code true} if the passed component is not null and has a 1991 * containing toplevel window which is opaque (so per-pixel translucency 1992 * is not enabled), {@code false} otherwise 1993 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 1994 */ 1995 public static boolean isContainingTopLevelOpaque(Component c) { 1996 Window w = getContainingWindow(c); 1997 return w != null && w.isOpaque(); 1998 } 1999 2000 /** 2001 * Returns whether or not a containing top level window for the passed 2002 * component is 2003 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 2004 * 2005 * @param c a Component which toplevel's to check 2006 * @return {@code true} if the passed component is not null and has a 2007 * containing toplevel window which has opacity less than 2008 * 1.0f (which means that it is translucent), {@code false} otherwise 2009 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 2010 */ 2011 public static boolean isContainingTopLevelTranslucent(Component c) { 2012 Window w = getContainingWindow(c); 2013 return w != null && w.getOpacity() < 1.0f; 2014 } 2015 2016 /** 2017 * Returns whether the native system requires using the peer.updateWindow() 2018 * method to update the contents of a non-opaque window, or if usual 2019 * painting procedures are sufficient. The default return value covers 2020 * the X11 systems. On MS Windows this method is overriden in WToolkit 2021 * to return true. 2022 */ 2023 public boolean needUpdateWindow() { 2024 return false; 2025 } 2026 2027 /** 2028 * Descendants of the SunToolkit should override and put their own logic here. 2029 */ 2030 public int getNumberOfButtons(){ 2031 return 3; 2032 } 2033 2034 /** 2035 * Checks that the given object implements/extends the given 2036 * interface/class. 2037 * 2038 * Note that using the instanceof operator causes a class to be loaded. 2039 * Using this method doesn't load a class and it can be used instead of 2040 * the instanceof operator for performance reasons. 2041 * 2042 * @param obj Object to be checked 2043 * @param type The name of the interface/class. Must be 2044 * fully-qualified interface/class name. 2045 * @return true, if this object implements/extends the given 2046 * interface/class, false, otherwise, or if obj or type is null 2047 */ 2048 public static boolean isInstanceOf(Object obj, String type) { 2049 if (obj == null) return false; 2050 if (type == null) return false; 2051 2052 return isInstanceOf(obj.getClass(), type); 2053 } 2054 2055 private static boolean isInstanceOf(Class<?> cls, String type) { 2056 if (cls == null) return false; 2057 2058 if (cls.getName().equals(type)) { 2059 return true; 2060 } 2061 2062 for (Class<?> c : cls.getInterfaces()) { 2063 if (c.getName().equals(type)) { 2064 return true; 2065 } 2066 } 2067 return isInstanceOf(cls.getSuperclass(), type); 2068 } 2069 2070 /////////////////////////////////////////////////////////////////////////// 2071 // 2072 // The following methods help set and identify whether a particular 2073 // AWTEvent object was produced by the system or by user code. As of this 2074 // writing the only consumer is the Java Plug-In, although this information 2075 // could be useful to more clients and probably should be formalized in 2076 // the public API. 2077 // 2078 /////////////////////////////////////////////////////////////////////////// 2079 2080 public static void setSystemGenerated(AWTEvent e) { 2081 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2082 } 2083 2084 public static boolean isSystemGenerated(AWTEvent e) { 2085 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2086 } 2087 2088 } // class SunToolkit 2089 2090 2091 /* 2092 * PostEventQueue is a Thread that runs in the same AppContext as the 2093 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2094 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2095 * events to this queue, which then calls EventQueue.postEvent(). 2096 * 2097 * We do this because EventQueue.postEvent() may be overridden by client 2098 * code, and we mustn't ever call client code from the toolkit thread. 2099 */ 2100 class PostEventQueue { 2101 private EventQueueItem queueHead = null; 2102 private EventQueueItem queueTail = null; 2103 private final EventQueue eventQueue; 2104 2105 PostEventQueue(EventQueue eq) { 2106 eventQueue = eq; 2107 } 2108 2109 public synchronized boolean noEvents() { 2110 return queueHead == null; 2111 } 2112 2113 /* 2114 * Continually post pending AWTEvents to the Java EventQueue. The method 2115 * is synchronized to ensure the flush is completed before a new event 2116 * can be posted to this queue. 2117 */ 2118 public synchronized void flush() { 2119 EventQueueItem tempQueue = queueHead; 2120 queueHead = queueTail = null; 2121 while (tempQueue != null) { 2122 eventQueue.postEvent(tempQueue.event); 2123 tempQueue = tempQueue.next; 2124 } 2125 } 2126 2127 /* 2128 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2129 */ 2130 void postEvent(AWTEvent event) { 2131 EventQueueItem item = new EventQueueItem(event); 2132 2133 synchronized (this) { 2134 if (queueHead == null) { 2135 queueHead = queueTail = item; 2136 } else { 2137 queueTail.next = item; 2138 queueTail = item; 2139 } 2140 } 2141 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2142 } 2143 } // class PostEventQueue