1 /* 2 * Copyright (c) 1997, 2012, 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.net.URL; 40 import java.util.*; 41 import java.util.concurrent.TimeUnit; 42 import java.util.concurrent.locks.Condition; 43 import java.util.concurrent.locks.Lock; 44 import java.util.concurrent.locks.ReentrantLock; 45 46 import sun.security.util.SecurityConstants; 47 import sun.util.logging.PlatformLogger; 48 import sun.misc.SoftCache; 49 import sun.font.FontDesignMetrics; 50 import sun.awt.im.InputContext; 51 import sun.awt.image.*; 52 import sun.security.action.GetPropertyAction; 53 import sun.security.action.GetBooleanAction; 54 import java.lang.reflect.Field; 55 import java.lang.reflect.Method; 56 import java.lang.reflect.Constructor; 57 import java.lang.reflect.InvocationTargetException; 58 import java.security.AccessController; 59 import java.security.PrivilegedAction; 60 import java.security.PrivilegedActionException; 61 import java.security.PrivilegedExceptionAction; 62 63 public abstract class SunToolkit extends Toolkit 64 implements WindowClosingSupport, WindowClosingListener, 65 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 66 67 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunToolkit"); 68 69 /* Load debug settings for native code */ 70 static { 71 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) { 72 DebugSettings.init(); 73 } 74 }; 75 76 /** 77 * Special mask for the UngrabEvent events, in addition to the 78 * public masks defined in AWTEvent. Should be used as the mask 79 * value for Toolkit.addAWTEventListener. 80 */ 81 public static final int GRAB_EVENT_MASK = 0x80000000; 82 83 private static Method wakeupMethod; 84 /* The key to put()/get() the PostEventQueue into/from the AppContext. 85 */ 86 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 87 88 /** 89 * Number of buttons. 90 * By default it's taken from the system. If system value does not 91 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 92 */ 93 protected static int numberOfButtons = 0; 94 95 96 /* XFree standard mention 24 buttons as maximum: 97 * http://www.xfree86.org/current/mouse.4.html 98 * We workaround systems supporting more than 24 buttons. 99 * Otherwise, we have to use long type values as masks 100 * which leads to API change. 101 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 102 * the 4-bytes limit for the int type. (CR 6799099) 103 * One more bit is reserved for FIRST_HIGH_BIT. 104 */ 105 public final static int MAX_BUTTONS_SUPPORTED = 20; 106 107 private static void initEQ(AppContext appContext) { 108 EventQueue eventQueue; 109 110 String eqName = System.getProperty("AWT.EventQueueClass", 111 "java.awt.EventQueue"); 112 113 try { 114 eventQueue = (EventQueue)Class.forName(eqName).newInstance(); 115 } catch (Exception e) { 116 e.printStackTrace(); 117 System.err.println("Failed loading " + eqName + ": " + e); 118 eventQueue = new EventQueue(); 119 } 120 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 121 122 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 123 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 124 } 125 126 public SunToolkit() { 127 // 7122796: Always create an EQ for the main AppContext 128 initEQ(AppContext.getMainAppContext()); 129 } 130 131 public boolean useBufferPerWindow() { 132 return false; 133 } 134 135 public abstract WindowPeer createWindow(Window target) 136 throws HeadlessException; 137 138 public abstract FramePeer createFrame(Frame target) 139 throws HeadlessException; 140 141 public abstract DialogPeer createDialog(Dialog target) 142 throws HeadlessException; 143 144 public abstract ButtonPeer createButton(Button target) 145 throws HeadlessException; 146 147 public abstract TextFieldPeer createTextField(TextField target) 148 throws HeadlessException; 149 150 public abstract ChoicePeer createChoice(Choice target) 151 throws HeadlessException; 152 153 public abstract LabelPeer createLabel(Label target) 154 throws HeadlessException; 155 156 public abstract ListPeer createList(java.awt.List target) 157 throws HeadlessException; 158 159 public abstract CheckboxPeer createCheckbox(Checkbox target) 160 throws HeadlessException; 161 162 public abstract ScrollbarPeer createScrollbar(Scrollbar target) 163 throws HeadlessException; 164 165 public abstract ScrollPanePeer createScrollPane(ScrollPane target) 166 throws HeadlessException; 167 168 public abstract TextAreaPeer createTextArea(TextArea target) 169 throws HeadlessException; 170 171 public abstract FileDialogPeer createFileDialog(FileDialog target) 172 throws HeadlessException; 173 174 public abstract MenuBarPeer createMenuBar(MenuBar target) 175 throws HeadlessException; 176 177 public abstract MenuPeer createMenu(Menu target) 178 throws HeadlessException; 179 180 public abstract PopupMenuPeer createPopupMenu(PopupMenu target) 181 throws HeadlessException; 182 183 public abstract MenuItemPeer createMenuItem(MenuItem target) 184 throws HeadlessException; 185 186 public abstract CheckboxMenuItemPeer createCheckboxMenuItem( 187 CheckboxMenuItem target) 188 throws HeadlessException; 189 190 public abstract DragSourceContextPeer createDragSourceContextPeer( 191 DragGestureEvent dge) 192 throws InvalidDnDOperationException; 193 194 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 195 throws HeadlessException, AWTException; 196 197 public abstract SystemTrayPeer createSystemTray(SystemTray target); 198 199 public abstract boolean isTraySupported(); 200 201 @SuppressWarnings("deprecation") 202 public abstract FontPeer getFontPeer(String name, int style); 203 204 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen) 205 throws AWTException; 206 207 public abstract KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager) 208 throws HeadlessException; 209 210 /** 211 * The AWT lock is typically only used on Unix platforms to synchronize 212 * access to Xlib, OpenGL, etc. However, these methods are implemented 213 * in SunToolkit so that they can be called from shared code (e.g. 214 * from the OGL pipeline) or from the X11 pipeline regardless of whether 215 * XToolkit or MToolkit is currently in use. There are native macros 216 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 217 * methods is changed, make sure it is compatible with the native macros. 218 * 219 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 220 * used in place of: 221 * synchronized (getAWTLock()) { 222 * ... 223 * } 224 * 225 * By factoring these methods out specially, we are able to change the 226 * implementation of these methods (e.g. use more advanced locking 227 * mechanisms) without impacting calling code. 228 * 229 * Sample usage: 230 * private void doStuffWithXlib() { 231 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 232 * SunToolkit.awtLock(); 233 * try { 234 * ... 235 * XlibWrapper.XDoStuff(); 236 * } finally { 237 * SunToolkit.awtUnlock(); 238 * } 239 * } 240 */ 241 242 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 243 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 244 245 public static final void awtLock() { 246 AWT_LOCK.lock(); 247 } 248 249 public static final boolean awtTryLock() { 250 return AWT_LOCK.tryLock(); 251 } 252 253 public static final void awtUnlock() { 254 AWT_LOCK.unlock(); 255 } 256 257 public static final void awtLockWait() 258 throws InterruptedException 259 { 260 AWT_LOCK_COND.await(); 261 } 262 263 public static final void awtLockWait(long timeout) 264 throws InterruptedException 265 { 266 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 267 } 268 269 public static final void awtLockNotify() { 270 AWT_LOCK_COND.signal(); 271 } 272 273 public static final void awtLockNotifyAll() { 274 AWT_LOCK_COND.signalAll(); 275 } 276 277 public static final boolean isAWTLockHeldByCurrentThread() { 278 return AWT_LOCK.isHeldByCurrentThread(); 279 } 280 281 /* 282 * Create a new AppContext, along with its EventQueue, for a 283 * new ThreadGroup. Browser code, for example, would use this 284 * method to create an AppContext & EventQueue for an Applet. 285 */ 286 public static AppContext createNewAppContext() { 287 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 288 // Create appContext before initialization of EventQueue, so all 289 // the calls to AppContext.getAppContext() from EventQueue ctor 290 // return correct values 291 AppContext appContext = new AppContext(threadGroup); 292 293 initEQ(appContext); 294 295 return appContext; 296 } 297 298 public static Field getField(final Class<?> klass, final String fieldName) { 299 return AccessController.doPrivileged(new PrivilegedAction<Field>() { 300 public Field run() { 301 try { 302 Field field = klass.getDeclaredField(fieldName); 303 assert (field != null); 304 field.setAccessible(true); 305 return field; 306 } catch (SecurityException e) { 307 assert false; 308 } catch (NoSuchFieldException e) { 309 assert false; 310 } 311 return null; 312 }//run 313 }); 314 } 315 316 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 317 if (wakeupMethod == null){ 318 wakeupMethod = AccessController.doPrivileged(new PrivilegedAction<Method>() { 319 public Method run() { 320 try { 321 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} ); 322 if (method != null) { 323 method.setAccessible(true); 324 } 325 return method; 326 } catch (NoSuchMethodException e) { 327 assert false; 328 } catch (SecurityException e) { 329 assert false; 330 } 331 return null; 332 }//run 333 }); 334 } 335 try{ 336 if (wakeupMethod != null){ 337 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)}); 338 } 339 } catch (InvocationTargetException e){ 340 assert false; 341 } catch (IllegalAccessException e) { 342 assert false; 343 } 344 } 345 346 /* 347 * Fetch the peer associated with the given target (as specified 348 * in the peer creation method). This can be used to determine 349 * things like what the parent peer is. If the target is null 350 * or the target can't be found (either because the a peer was 351 * never created for it or the peer was disposed), a null will 352 * be returned. 353 */ 354 protected static Object targetToPeer(Object target) { 355 if (target != null && !GraphicsEnvironment.isHeadless()) { 356 return AWTAutoShutdown.getInstance().getPeer(target); 357 } 358 return null; 359 } 360 361 protected static void targetCreatedPeer(Object target, Object peer) { 362 if (target != null && peer != null && 363 !GraphicsEnvironment.isHeadless()) 364 { 365 AWTAutoShutdown.getInstance().registerPeer(target, peer); 366 } 367 } 368 369 protected static void targetDisposedPeer(Object target, Object peer) { 370 if (target != null && peer != null && 371 !GraphicsEnvironment.isHeadless()) 372 { 373 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 374 } 375 } 376 377 // Maps from non-Component/MenuComponent to AppContext. 378 // WeakHashMap<Component,AppContext> 379 private static final Map<Object, AppContext> appContextMap = 380 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>()); 381 382 /** 383 * Sets the appContext field of target. If target is not a Component or 384 * MenuComponent, this returns false. 385 */ 386 private static boolean setAppContext(Object target, 387 AppContext context) { 388 if (target instanceof Component) { 389 AWTAccessor.getComponentAccessor(). 390 setAppContext((Component)target, context); 391 } else if (target instanceof MenuComponent) { 392 AWTAccessor.getMenuComponentAccessor(). 393 setAppContext((MenuComponent)target, context); 394 } else { 395 return false; 396 } 397 return true; 398 } 399 400 /** 401 * Returns the appContext field for target. If target is not a 402 * Component or MenuComponent this returns null. 403 */ 404 private static AppContext getAppContext(Object target) { 405 if (target instanceof Component) { 406 return AWTAccessor.getComponentAccessor(). 407 getAppContext((Component)target); 408 } else if (target instanceof MenuComponent) { 409 return AWTAccessor.getMenuComponentAccessor(). 410 getAppContext((MenuComponent)target); 411 } else { 412 return null; 413 } 414 } 415 416 /* 417 * Fetch the AppContext associated with the given target. 418 * This can be used to determine things like which EventQueue 419 * to use for posting events to a Component. If the target is 420 * null or the target can't be found, a null with be returned. 421 */ 422 public static AppContext targetToAppContext(Object target) { 423 if (target == null || GraphicsEnvironment.isHeadless()) { 424 return null; 425 } 426 AppContext context = getAppContext(target); 427 if (context == null) { 428 // target is not a Component/MenuComponent, try the 429 // appContextMap. 430 context = appContextMap.get(target); 431 } 432 return context; 433 } 434 435 /** 436 * Sets the synchronous status of focus requests on lightweight 437 * components in the specified window to the specified value. 438 * If the boolean parameter is <code>true</code> then the focus 439 * requests on lightweight components will be performed 440 * synchronously, if it is <code>false</code>, then asynchronously. 441 * By default, all windows have their lightweight request status 442 * set to asynchronous. 443 * <p> 444 * The application can only set the status of lightweight focus 445 * requests to synchronous for any of its windows if it doesn't 446 * perform focus transfers between different heavyweight containers. 447 * In this case the observable focus behaviour is the same as with 448 * asynchronous status. 449 * <p> 450 * If the application performs focus transfer between different 451 * heavyweight containers and sets the lightweight focus request 452 * status to synchronous for any of its windows, then further focus 453 * behaviour is unspecified. 454 * <p> 455 * @param w window for which the lightweight focus request status 456 * should be set 457 * @param status the value of lightweight focus request status 458 */ 459 460 public static void setLWRequestStatus(Window changed,boolean status){ 461 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 462 }; 463 464 public static void checkAndSetPolicy(Container cont) { 465 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager. 466 getCurrentKeyboardFocusManager(). 467 getDefaultFocusTraversalPolicy(); 468 469 cont.setFocusTraversalPolicy(defaultPolicy); 470 } 471 472 private static FocusTraversalPolicy createLayoutPolicy() { 473 FocusTraversalPolicy policy = null; 474 try { 475 Class<?> layoutPolicyClass = 476 Class.forName("javax.swing.LayoutFocusTraversalPolicy"); 477 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance(); 478 } 479 catch (ClassNotFoundException e) { 480 assert false; 481 } 482 catch (InstantiationException e) { 483 assert false; 484 } 485 catch (IllegalAccessException e) { 486 assert false; 487 } 488 489 return policy; 490 } 491 492 /* 493 * Insert a mapping from target to AppContext, for later retrieval 494 * via targetToAppContext() above. 495 */ 496 public static void insertTargetMapping(Object target, AppContext appContext) { 497 if (!GraphicsEnvironment.isHeadless()) { 498 if (!setAppContext(target, appContext)) { 499 // Target is not a Component/MenuComponent, use the private Map 500 // instead. 501 appContextMap.put(target, appContext); 502 } 503 } 504 } 505 506 /* 507 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 508 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 509 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 510 * not be called under another lock since it locks the EventQueue. 511 * See bugids 4632918, 4526597. 512 */ 513 public static void postEvent(AppContext appContext, AWTEvent event) { 514 if (event == null) { 515 throw new NullPointerException(); 516 } 517 // All events posted via this method are system-generated. 518 // Placing the following call here reduces considerably the 519 // number of places throughout the toolkit that would 520 // otherwise have to be modified to precisely identify 521 // system-generated events. 522 setSystemGenerated(event); 523 AppContext eventContext = targetToAppContext(event.getSource()); 524 if (eventContext != null && !eventContext.equals(appContext)) { 525 log.fine("Event posted on wrong app context : " + event); 526 } 527 PostEventQueue postEventQueue = 528 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 529 if (postEventQueue != null) { 530 postEventQueue.postEvent(event); 531 } 532 } 533 534 /* 535 * Post AWTEvent of high priority. 536 */ 537 public static void postPriorityEvent(final AWTEvent e) { 538 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 539 public void run() { 540 AWTAccessor.getAWTEventAccessor().setPosted(e); 541 ((Component)e.getSource()).dispatchEvent(e); 542 } 543 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 544 postEvent(targetToAppContext(e.getSource()), pe); 545 } 546 547 protected static final Lock flushLock = new ReentrantLock(); 548 private static boolean isFlushingPendingEvents = false; 549 550 /* 551 * Flush any pending events which haven't been posted to the AWT 552 * EventQueue yet. 553 */ 554 public static void flushPendingEvents() { 555 flushLock.lock(); 556 try { 557 // Don't call flushPendingEvents() recursively 558 if (!isFlushingPendingEvents) { 559 isFlushingPendingEvents = true; 560 AppContext appContext = AppContext.getAppContext(); 561 PostEventQueue postEventQueue = 562 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 563 if (postEventQueue != null) { 564 postEventQueue.flush(); 565 } 566 } 567 } finally { 568 isFlushingPendingEvents = false; 569 flushLock.unlock(); 570 } 571 } 572 573 public static boolean isPostEventQueueEmpty() { 574 AppContext appContext = AppContext.getAppContext(); 575 PostEventQueue postEventQueue = 576 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 577 if (postEventQueue != null) { 578 return postEventQueue.noEvents(); 579 } else { 580 return true; 581 } 582 } 583 584 /* 585 * Execute a chunk of code on the Java event handler thread for the 586 * given target. Does not wait for the execution to occur before 587 * returning to the caller. 588 */ 589 public static void executeOnEventHandlerThread(Object target, 590 Runnable runnable) { 591 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 592 } 593 594 /* 595 * Fixed 5064013: the InvocationEvent time should be equals 596 * the time of the ActionEvent 597 */ 598 @SuppressWarnings("serial") 599 public static void executeOnEventHandlerThread(Object target, 600 Runnable runnable, 601 final long when) { 602 executeOnEventHandlerThread( 603 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 604 public long getWhen() { 605 return when; 606 } 607 }); 608 } 609 610 /* 611 * Execute a chunk of code on the Java event handler thread for the 612 * given target. Does not wait for the execution to occur before 613 * returning to the caller. 614 */ 615 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 616 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 617 } 618 619 /* 620 * Execute a chunk of code on the Java event handler thread. The 621 * method takes into account provided AppContext and sets 622 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the 623 * event. See 6451487 for detailes. 624 * Does not wait for the execution to occur before returning to 625 * the caller. 626 */ 627 public static void invokeLaterOnAppContext( 628 AppContext appContext, Runnable dispatcher) 629 { 630 postEvent(appContext, 631 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 632 PeerEvent.PRIORITY_EVENT)); 633 } 634 635 /* 636 * Execute a chunk of code on the Java event handler thread for the 637 * given target. Waits for the execution to occur before returning 638 * to the caller. 639 */ 640 public static void executeOnEDTAndWait(Object target, Runnable runnable) 641 throws InterruptedException, InvocationTargetException 642 { 643 if (EventQueue.isDispatchThread()) { 644 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 645 } 646 647 class AWTInvocationLock {} 648 Object lock = new AWTInvocationLock(); 649 650 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 651 652 synchronized (lock) { 653 executeOnEventHandlerThread(event); 654 while(!event.isDispatched()) { 655 lock.wait(); 656 } 657 } 658 659 Throwable eventThrowable = event.getThrowable(); 660 if (eventThrowable != null) { 661 throw new InvocationTargetException(eventThrowable); 662 } 663 } 664 665 /* 666 * Returns true if the calling thread is the event dispatch thread 667 * contained within AppContext which associated with the given target. 668 * Use this call to ensure that a given task is being executed 669 * (or not being) on the event dispatch thread for the given target. 670 */ 671 public static boolean isDispatchThreadForAppContext(Object target) { 672 AppContext appContext = targetToAppContext(target); 673 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 674 675 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 676 return accessor.isDispatchThreadImpl(eq); 677 } 678 679 public Dimension getScreenSize() { 680 return new Dimension(getScreenWidth(), getScreenHeight()); 681 } 682 protected abstract int getScreenWidth(); 683 protected abstract int getScreenHeight(); 684 685 @SuppressWarnings("deprecation") 686 public FontMetrics getFontMetrics(Font font) { 687 return FontDesignMetrics.getMetrics(font); 688 } 689 690 @SuppressWarnings("deprecation") 691 public String[] getFontList() { 692 String[] hardwiredFontList = { 693 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 694 Font.DIALOG_INPUT 695 696 // -- Obsolete font names from 1.0.2. It was decided that 697 // -- getFontList should not return these old names: 698 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 699 }; 700 return hardwiredFontList; 701 } 702 703 public PanelPeer createPanel(Panel target) { 704 return (PanelPeer)createComponent(target); 705 } 706 707 public CanvasPeer createCanvas(Canvas target) { 708 return (CanvasPeer)createComponent(target); 709 } 710 711 /** 712 * Disables erasing of background on the canvas before painting if 713 * this is supported by the current toolkit. It is recommended to 714 * call this method early, before the Canvas becomes displayable, 715 * because some Toolkit implementations do not support changing 716 * this property once the Canvas becomes displayable. 717 */ 718 public void disableBackgroundErase(Canvas canvas) { 719 disableBackgroundEraseImpl(canvas); 720 } 721 722 /** 723 * Disables the native erasing of the background on the given 724 * component before painting if this is supported by the current 725 * toolkit. This only has an effect for certain components such as 726 * Canvas, Panel and Window. It is recommended to call this method 727 * early, before the Component becomes displayable, because some 728 * Toolkit implementations do not support changing this property 729 * once the Component becomes displayable. 730 */ 731 public void disableBackgroundErase(Component component) { 732 disableBackgroundEraseImpl(component); 733 } 734 735 private void disableBackgroundEraseImpl(Component component) { 736 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 737 } 738 739 /** 740 * Returns the value of "sun.awt.noerasebackground" property. Default 741 * value is {@code false}. 742 */ 743 public static boolean getSunAwtNoerasebackground() { 744 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 745 } 746 747 /** 748 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 749 * value is {@code false}. 750 */ 751 public static boolean getSunAwtErasebackgroundonresize() { 752 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 753 } 754 755 756 static final SoftCache imgCache = new SoftCache(); 757 758 static Image getImageFromHash(Toolkit tk, URL url) { 759 SecurityManager sm = System.getSecurityManager(); 760 if (sm != null) { 761 try { 762 java.security.Permission perm = 763 url.openConnection().getPermission(); 764 if (perm != null) { 765 try { 766 sm.checkPermission(perm); 767 } catch (SecurityException se) { 768 // fallback to checkRead/checkConnect for pre 1.2 769 // security managers 770 if ((perm instanceof java.io.FilePermission) && 771 perm.getActions().indexOf("read") != -1) { 772 sm.checkRead(perm.getName()); 773 } else if ((perm instanceof 774 java.net.SocketPermission) && 775 perm.getActions().indexOf("connect") != -1) { 776 sm.checkConnect(url.getHost(), url.getPort()); 777 } else { 778 throw se; 779 } 780 } 781 } 782 } catch (java.io.IOException ioe) { 783 sm.checkConnect(url.getHost(), url.getPort()); 784 } 785 } 786 synchronized (imgCache) { 787 Image img = (Image)imgCache.get(url); 788 if (img == null) { 789 try { 790 img = tk.createImage(new URLImageSource(url)); 791 imgCache.put(url, img); 792 } catch (Exception e) { 793 } 794 } 795 return img; 796 } 797 } 798 799 static Image getImageFromHash(Toolkit tk, 800 String filename) { 801 SecurityManager security = System.getSecurityManager(); 802 if (security != null) { 803 security.checkRead(filename); 804 } 805 synchronized (imgCache) { 806 Image img = (Image)imgCache.get(filename); 807 if (img == null) { 808 try { 809 img = tk.createImage(new FileImageSource(filename)); 810 imgCache.put(filename, img); 811 } catch (Exception e) { 812 } 813 } 814 return img; 815 } 816 } 817 818 public Image getImage(String filename) { 819 return getImageFromHash(this, filename); 820 } 821 822 public Image getImage(URL url) { 823 return getImageFromHash(this, url); 824 } 825 826 public Image createImage(String filename) { 827 SecurityManager security = System.getSecurityManager(); 828 if (security != null) { 829 security.checkRead(filename); 830 } 831 return createImage(new FileImageSource(filename)); 832 } 833 834 public Image createImage(URL url) { 835 SecurityManager sm = System.getSecurityManager(); 836 if (sm != null) { 837 try { 838 java.security.Permission perm = 839 url.openConnection().getPermission(); 840 if (perm != null) { 841 try { 842 sm.checkPermission(perm); 843 } catch (SecurityException se) { 844 // fallback to checkRead/checkConnect for pre 1.2 845 // security managers 846 if ((perm instanceof java.io.FilePermission) && 847 perm.getActions().indexOf("read") != -1) { 848 sm.checkRead(perm.getName()); 849 } else if ((perm instanceof 850 java.net.SocketPermission) && 851 perm.getActions().indexOf("connect") != -1) { 852 sm.checkConnect(url.getHost(), url.getPort()); 853 } else { 854 throw se; 855 } 856 } 857 } 858 } catch (java.io.IOException ioe) { 859 sm.checkConnect(url.getHost(), url.getPort()); 860 } 861 } 862 return createImage(new URLImageSource(url)); 863 } 864 865 public Image createImage(byte[] data, int offset, int length) { 866 return createImage(new ByteArrayImageSource(data, offset, length)); 867 } 868 869 public Image createImage(ImageProducer producer) { 870 return new ToolkitImage(producer); 871 } 872 873 public int checkImage(Image img, int w, int h, ImageObserver o) { 874 if (!(img instanceof ToolkitImage)) { 875 return ImageObserver.ALLBITS; 876 } 877 878 ToolkitImage tkimg = (ToolkitImage)img; 879 int repbits; 880 if (w == 0 || h == 0) { 881 repbits = ImageObserver.ALLBITS; 882 } else { 883 repbits = tkimg.getImageRep().check(o); 884 } 885 return tkimg.check(o) | repbits; 886 } 887 888 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 889 if (w == 0 || h == 0) { 890 return true; 891 } 892 893 // Must be a ToolkitImage 894 if (!(img instanceof ToolkitImage)) { 895 return true; 896 } 897 898 ToolkitImage tkimg = (ToolkitImage)img; 899 if (tkimg.hasError()) { 900 if (o != null) { 901 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 902 -1, -1, -1, -1); 903 } 904 return false; 905 } 906 ImageRepresentation ir = tkimg.getImageRep(); 907 return ir.prepare(o); 908 } 909 910 /** 911 * Scans {@code imageList} for best-looking image of specified dimensions. 912 * Image can be scaled and/or padded with transparency. 913 */ 914 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) { 915 if (width == 0 || height == 0) { 916 return null; 917 } 918 Image bestImage = null; 919 int bestWidth = 0; 920 int bestHeight = 0; 921 double bestSimilarity = 3; //Impossibly high value 922 double bestScaleFactor = 0; 923 for (Iterator<Image> i = imageList.iterator();i.hasNext();) { 924 //Iterate imageList looking for best matching image. 925 //'Similarity' measure is defined as good scale factor and small insets. 926 //best possible similarity is 0 (no scale, no insets). 927 //It's found while the experiments that good-looking result is achieved 928 //with scale factors x1, x3/4, x2/3, xN, x1/N. 929 Image im = i.next(); 930 if (im == null) { 931 if (log.isLoggable(PlatformLogger.FINER)) { 932 log.finer("SunToolkit.getScaledIconImage: " + 933 "Skipping the image passed into Java because it's null."); 934 } 935 continue; 936 } 937 if (im instanceof ToolkitImage) { 938 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 939 ir.reconstruct(ImageObserver.ALLBITS); 940 } 941 int iw; 942 int ih; 943 try { 944 iw = im.getWidth(null); 945 ih = im.getHeight(null); 946 } catch (Exception e){ 947 if (log.isLoggable(PlatformLogger.FINER)) { 948 log.finer("SunToolkit.getScaledIconImage: " + 949 "Perhaps the image passed into Java is broken. Skipping this icon."); 950 } 951 continue; 952 } 953 if (iw > 0 && ih > 0) { 954 //Calc scale factor 955 double scaleFactor = Math.min((double)width / (double)iw, 956 (double)height / (double)ih); 957 //Calculate scaled image dimensions 958 //adjusting scale factor to nearest "good" value 959 int adjw = 0; 960 int adjh = 0; 961 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 962 if (scaleFactor >= 2) { 963 //Need to enlarge image more than twice 964 //Round down scale factor to multiply by integer value 965 scaleFactor = Math.floor(scaleFactor); 966 adjw = iw * (int)scaleFactor; 967 adjh = ih * (int)scaleFactor; 968 scaleMeasure = 1.0 - 0.5 / scaleFactor; 969 } else if (scaleFactor >= 1) { 970 //Don't scale 971 scaleFactor = 1.0; 972 adjw = iw; 973 adjh = ih; 974 scaleMeasure = 0; 975 } else if (scaleFactor >= 0.75) { 976 //Multiply by 3/4 977 scaleFactor = 0.75; 978 adjw = iw * 3 / 4; 979 adjh = ih * 3 / 4; 980 scaleMeasure = 0.3; 981 } else if (scaleFactor >= 0.6666) { 982 //Multiply by 2/3 983 scaleFactor = 0.6666; 984 adjw = iw * 2 / 3; 985 adjh = ih * 2 / 3; 986 scaleMeasure = 0.33; 987 } else { 988 //Multiply size by 1/scaleDivider 989 //where scaleDivider is minimum possible integer 990 //larger than 1/scaleFactor 991 double scaleDivider = Math.ceil(1.0 / scaleFactor); 992 scaleFactor = 1.0 / scaleDivider; 993 adjw = (int)Math.round((double)iw / scaleDivider); 994 adjh = (int)Math.round((double)ih / scaleDivider); 995 scaleMeasure = 1.0 - 1.0 / scaleDivider; 996 } 997 double similarity = ((double)width - (double)adjw) / (double)width + 998 ((double)height - (double)adjh) / (double)height + //Large padding is bad 999 scaleMeasure; //Large rescale is bad 1000 if (similarity < bestSimilarity) { 1001 bestSimilarity = similarity; 1002 bestScaleFactor = scaleFactor; 1003 bestImage = im; 1004 bestWidth = adjw; 1005 bestHeight = adjh; 1006 } 1007 if (similarity == 0) break; 1008 } 1009 } 1010 if (bestImage == null) { 1011 //No images were found, possibly all are broken 1012 return null; 1013 } 1014 BufferedImage bimage = 1015 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 1016 Graphics2D g = bimage.createGraphics(); 1017 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 1018 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 1019 try { 1020 int x = (width - bestWidth) / 2; 1021 int y = (height - bestHeight) / 2; 1022 if (log.isLoggable(PlatformLogger.FINER)) { 1023 log.finer("WWindowPeer.getScaledIconData() result : " + 1024 "w : " + width + " h : " + height + 1025 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) + 1026 " sim : " + bestSimilarity + " sf : " + bestScaleFactor + 1027 " adjW : " + bestWidth + " adjH : " + bestHeight + 1028 " x : " + x + " y : " + y); 1029 } 1030 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 1031 } finally { 1032 g.dispose(); 1033 } 1034 return bimage; 1035 } 1036 1037 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1038 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1039 if (bimage == null) { 1040 if (log.isLoggable(PlatformLogger.FINER)) { 1041 log.finer("SunToolkit.getScaledIconData: " + 1042 "Perhaps the image passed into Java is broken. Skipping this icon."); 1043 } 1044 return null; 1045 } 1046 Raster raster = bimage.getRaster(); 1047 DataBuffer buffer = raster.getDataBuffer(); 1048 return (DataBufferInt)buffer; 1049 } 1050 1051 protected EventQueue getSystemEventQueueImpl() { 1052 return getSystemEventQueueImplPP(); 1053 } 1054 1055 // Package private implementation 1056 static EventQueue getSystemEventQueueImplPP() { 1057 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1058 } 1059 1060 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1061 EventQueue theEventQueue = 1062 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1063 return theEventQueue; 1064 } 1065 1066 /** 1067 * Give native peers the ability to query the native container 1068 * given a native component (eg the direct parent may be lightweight). 1069 */ 1070 public static Container getNativeContainer(Component c) { 1071 return Toolkit.getNativeContainer(c); 1072 } 1073 1074 /** 1075 * Gives native peers the ability to query the closest HW component. 1076 * If the given component is heavyweight, then it returns this. Otherwise, 1077 * it goes one level up in the hierarchy and tests next component. 1078 */ 1079 public static Component getHeavyweightComponent(Component c) { 1080 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1081 c = AWTAccessor.getComponentAccessor().getParent(c); 1082 } 1083 return c; 1084 } 1085 1086 /** 1087 * Returns key modifiers used by Swing to set up a focus accelerator key stroke. 1088 */ 1089 public int getFocusAcceleratorKeyMask() { 1090 return InputEvent.ALT_MASK; 1091 } 1092 1093 /** 1094 * Tests whether specified key modifiers mask can be used to enter a printable 1095 * character. This is a default implementation of this method, which reflects 1096 * the way things work on Windows: here, pressing ctrl + alt allows user to enter 1097 * characters from the extended character set (like euro sign or math symbols) 1098 */ 1099 public boolean isPrintableCharacterModifiersMask(int mods) { 1100 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK)); 1101 } 1102 1103 /** 1104 * Returns whether popup is allowed to be shown above the task bar. 1105 * This is a default implementation of this method, which checks 1106 * corresponding security permission. 1107 */ 1108 public boolean canPopupOverlapTaskBar() { 1109 boolean result = true; 1110 try { 1111 SecurityManager sm = System.getSecurityManager(); 1112 if (sm != null) { 1113 sm.checkPermission( 1114 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION); 1115 } 1116 } catch (SecurityException se) { 1117 // There is no permission to show popups over the task bar 1118 result = false; 1119 } 1120 return result; 1121 } 1122 1123 /** 1124 * Returns a new input method window, with behavior as specified in 1125 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1126 * If the inputContext is not null, the window should return it from its 1127 * getInputContext() method. The window needs to implement 1128 * sun.awt.im.InputMethodWindow. 1129 * <p> 1130 * SunToolkit subclasses can override this method to return better input 1131 * method windows. 1132 */ 1133 public Window createInputMethodWindow(String title, InputContext context) { 1134 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1135 } 1136 1137 /** 1138 * Returns whether enableInputMethods should be set to true for peered 1139 * TextComponent instances on this platform. False by default. 1140 */ 1141 public boolean enableInputMethodsForTextComponent() { 1142 return false; 1143 } 1144 1145 private static Locale startupLocale = null; 1146 1147 /** 1148 * Returns the locale in which the runtime was started. 1149 */ 1150 public static Locale getStartupLocale() { 1151 if (startupLocale == null) { 1152 String language, region, country, variant; 1153 language = AccessController.doPrivileged( 1154 new GetPropertyAction("user.language", "en")); 1155 // for compatibility, check for old user.region property 1156 region = AccessController.doPrivileged( 1157 new GetPropertyAction("user.region")); 1158 if (region != null) { 1159 // region can be of form country, country_variant, or _variant 1160 int i = region.indexOf('_'); 1161 if (i >= 0) { 1162 country = region.substring(0, i); 1163 variant = region.substring(i + 1); 1164 } else { 1165 country = region; 1166 variant = ""; 1167 } 1168 } else { 1169 country = AccessController.doPrivileged( 1170 new GetPropertyAction("user.country", "")); 1171 variant = AccessController.doPrivileged( 1172 new GetPropertyAction("user.variant", "")); 1173 } 1174 startupLocale = new Locale(language, country, variant); 1175 } 1176 return startupLocale; 1177 } 1178 1179 /** 1180 * Returns the default keyboard locale of the underlying operating system 1181 */ 1182 public Locale getDefaultKeyboardLocale() { 1183 return getStartupLocale(); 1184 } 1185 1186 private static String dataTransfererClassName = null; 1187 1188 protected static void setDataTransfererClassName(String className) { 1189 dataTransfererClassName = className; 1190 } 1191 1192 public static String getDataTransfererClassName() { 1193 if (dataTransfererClassName == null) { 1194 Toolkit.getDefaultToolkit(); // transferer set during toolkit init 1195 } 1196 return dataTransfererClassName; 1197 } 1198 1199 // Support for window closing event notifications 1200 private transient WindowClosingListener windowClosingListener = null; 1201 /** 1202 * @see sun.awt.WindowClosingSupport#getWindowClosingListener 1203 */ 1204 public WindowClosingListener getWindowClosingListener() { 1205 return windowClosingListener; 1206 } 1207 /** 1208 * @see sun.awt.WindowClosingSupport#setWindowClosingListener 1209 */ 1210 public void setWindowClosingListener(WindowClosingListener wcl) { 1211 windowClosingListener = wcl; 1212 } 1213 1214 /** 1215 * @see sun.awt.WindowClosingListener#windowClosingNotify 1216 */ 1217 public RuntimeException windowClosingNotify(WindowEvent event) { 1218 if (windowClosingListener != null) { 1219 return windowClosingListener.windowClosingNotify(event); 1220 } else { 1221 return null; 1222 } 1223 } 1224 /** 1225 * @see sun.awt.WindowClosingListener#windowClosingDelivered 1226 */ 1227 public RuntimeException windowClosingDelivered(WindowEvent event) { 1228 if (windowClosingListener != null) { 1229 return windowClosingListener.windowClosingDelivered(event); 1230 } else { 1231 return null; 1232 } 1233 } 1234 1235 private static DefaultMouseInfoPeer mPeer = null; 1236 1237 protected synchronized MouseInfoPeer getMouseInfoPeer() { 1238 if (mPeer == null) { 1239 mPeer = new DefaultMouseInfoPeer(); 1240 } 1241 return mPeer; 1242 } 1243 1244 1245 /** 1246 * Returns whether default toolkit needs the support of the xembed 1247 * from embedding host(if any). 1248 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1249 */ 1250 public static boolean needsXEmbed() { 1251 String noxembed = AccessController. 1252 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1253 if ("true".equals(noxembed)) { 1254 return false; 1255 } 1256 1257 Toolkit tk = Toolkit.getDefaultToolkit(); 1258 if (tk instanceof SunToolkit) { 1259 // SunToolkit descendants should override this method to specify 1260 // concrete behavior 1261 return ((SunToolkit)tk).needsXEmbedImpl(); 1262 } else { 1263 // Non-SunToolkit doubtly might support XEmbed 1264 return false; 1265 } 1266 } 1267 1268 /** 1269 * Returns whether this toolkit needs the support of the xembed 1270 * from embedding host(if any). 1271 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1272 */ 1273 protected boolean needsXEmbedImpl() { 1274 return false; 1275 } 1276 1277 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1278 1279 /** 1280 * Returns whether the XEmbed server feature is requested by 1281 * developer. If true, Toolkit should return an 1282 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1283 */ 1284 protected final boolean isXEmbedServerRequested() { 1285 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1286 } 1287 1288 /** 1289 * Returns whether the modal exclusion API is supported by the current toolkit. 1290 * When it isn't supported, calling <code>setModalExcluded</code> has no 1291 * effect, and <code>isModalExcluded</code> returns false for all windows. 1292 * 1293 * @return true if modal exclusion is supported by the toolkit, false otherwise 1294 * 1295 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1296 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1297 * 1298 * @since 1.5 1299 */ 1300 public static boolean isModalExcludedSupported() 1301 { 1302 Toolkit tk = Toolkit.getDefaultToolkit(); 1303 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1304 } 1305 /* 1306 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1307 * 1308 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1309 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1310 * 1311 * @since 1.5 1312 */ 1313 protected boolean isModalExcludedSupportedImpl() 1314 { 1315 return false; 1316 } 1317 1318 /* 1319 * Sets this window to be excluded from being modally blocked. When the 1320 * toolkit supports modal exclusion and this method is called, input 1321 * events, focus transfer and z-order will continue to work for the 1322 * window, it's owned windows and child components, even in the 1323 * presence of a modal dialog. 1324 * For details on which <code>Window</code>s are normally blocked 1325 * by modal dialog, see {@link java.awt.Dialog}. 1326 * Invoking this method when the modal exclusion API is not supported by 1327 * the current toolkit has no effect. 1328 * @param window Window to be marked as not modally blocked 1329 * @see java.awt.Dialog 1330 * @see java.awt.Dialog#setModal(boolean) 1331 * @see sun.awt.SunToolkit#isModalExcludedSupported 1332 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1333 */ 1334 public static void setModalExcluded(Window window) 1335 { 1336 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1337 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1338 } 1339 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1340 } 1341 1342 /* 1343 * Returns whether the specified window is blocked by modal dialogs. 1344 * If the modal exclusion API isn't supported by the current toolkit, 1345 * it returns false for all windows. 1346 * 1347 * @param window Window to test for modal exclusion 1348 * 1349 * @return true if the window is modal excluded, false otherwise. If 1350 * the modal exclusion isn't supported by the current Toolkit, false 1351 * is returned 1352 * 1353 * @see sun.awt.SunToolkit#isModalExcludedSupported 1354 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1355 * 1356 * @since 1.5 1357 */ 1358 public static boolean isModalExcluded(Window window) 1359 { 1360 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1361 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1362 } 1363 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1364 } 1365 1366 /** 1367 * Overridden in XToolkit and WToolkit 1368 */ 1369 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1370 return (modalityType == Dialog.ModalityType.MODELESS) || 1371 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1372 } 1373 1374 /** 1375 * Overridden in XToolkit and WToolkit 1376 */ 1377 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1378 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1379 } 1380 1381 /////////////////////////////////////////////////////////////////////////// 1382 // 1383 // The following is used by the Java Plug-in to coordinate dialog modality 1384 // between containing applications (browsers, ActiveX containers etc) and 1385 // the AWT. 1386 // 1387 /////////////////////////////////////////////////////////////////////////// 1388 1389 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1390 1391 public void addModalityListener(ModalityListener listener) { 1392 modalityListeners.add(listener); 1393 } 1394 1395 public void removeModalityListener(ModalityListener listener) { 1396 modalityListeners.remove(listener); 1397 } 1398 1399 public void notifyModalityPushed(Dialog dialog) { 1400 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1401 } 1402 1403 public void notifyModalityPopped(Dialog dialog) { 1404 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1405 } 1406 1407 final void notifyModalityChange(int id, Dialog source) { 1408 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1409 ev.dispatch(); 1410 } 1411 1412 static class ModalityListenerList implements ModalityListener { 1413 1414 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1415 1416 void add(ModalityListener listener) { 1417 listeners.addElement(listener); 1418 } 1419 1420 void remove(ModalityListener listener) { 1421 listeners.removeElement(listener); 1422 } 1423 1424 public void modalityPushed(ModalityEvent ev) { 1425 Iterator<ModalityListener> it = listeners.iterator(); 1426 while (it.hasNext()) { 1427 it.next().modalityPushed(ev); 1428 } 1429 } 1430 1431 public void modalityPopped(ModalityEvent ev) { 1432 Iterator<ModalityListener> it = listeners.iterator(); 1433 while (it.hasNext()) { 1434 it.next().modalityPopped(ev); 1435 } 1436 } 1437 } // end of class ModalityListenerList 1438 1439 /////////////////////////////////////////////////////////////////////////// 1440 // End Plug-in code 1441 /////////////////////////////////////////////////////////////////////////// 1442 1443 public static boolean isLightweightOrUnknown(Component comp) { 1444 if (comp.isLightweight() 1445 || !(getDefaultToolkit() instanceof SunToolkit)) 1446 { 1447 return true; 1448 } 1449 return !(comp instanceof Button 1450 || comp instanceof Canvas 1451 || comp instanceof Checkbox 1452 || comp instanceof Choice 1453 || comp instanceof Label 1454 || comp instanceof java.awt.List 1455 || comp instanceof Panel 1456 || comp instanceof Scrollbar 1457 || comp instanceof ScrollPane 1458 || comp instanceof TextArea 1459 || comp instanceof TextField 1460 || comp instanceof Window); 1461 } 1462 1463 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) { 1464 Method res = null; 1465 try { 1466 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() { 1467 public Method run() throws Exception { 1468 Method m = clz.getDeclaredMethod(methodName, params); 1469 m.setAccessible(true); 1470 return m; 1471 } 1472 }); 1473 } catch (PrivilegedActionException ex) { 1474 ex.printStackTrace(); 1475 } 1476 return res; 1477 } 1478 1479 @SuppressWarnings("serial") 1480 public static class OperationTimedOut extends RuntimeException { 1481 public OperationTimedOut(String msg) { 1482 super(msg); 1483 } 1484 public OperationTimedOut() { 1485 } 1486 } 1487 1488 @SuppressWarnings("serial") 1489 public static class InfiniteLoop extends RuntimeException { 1490 } 1491 1492 @SuppressWarnings("serial") 1493 public static class IllegalThreadException extends RuntimeException { 1494 public IllegalThreadException(String msg) { 1495 super(msg); 1496 } 1497 public IllegalThreadException() { 1498 } 1499 } 1500 1501 public static final int DEFAULT_WAIT_TIME = 10000; 1502 private static final int MAX_ITERS = 20; 1503 private static final int MIN_ITERS = 0; 1504 private static final int MINIMAL_EDELAY = 0; 1505 1506 /** 1507 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1508 */ 1509 public void realSync() throws OperationTimedOut, InfiniteLoop { 1510 realSync(DEFAULT_WAIT_TIME); 1511 } 1512 1513 /** 1514 * Forces toolkit to synchronize with the native windowing 1515 * sub-system, flushing all pending work and waiting for all the 1516 * events to be processed. This method guarantees that after 1517 * return no additional Java events will be generated, unless 1518 * cause by user. Obviously, the method cannot be used on the 1519 * event dispatch thread (EDT). In case it nevertheless gets 1520 * invoked on this thread, the method throws the 1521 * IllegalThreadException runtime exception. 1522 * 1523 * <p> This method allows to write tests without explicit timeouts 1524 * or wait for some event. Example: 1525 * <code> 1526 * Frame f = ...; 1527 * f.setVisible(true); 1528 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1529 * </code> 1530 * 1531 * <p> After realSync, <code>f</code> will be completely visible 1532 * on the screen, its getLocationOnScreen will be returning the 1533 * right result and it will be the focus owner. 1534 * 1535 * <p> Another example: 1536 * <code> 1537 * b.requestFocus(); 1538 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1539 * </code> 1540 * 1541 * <p> After realSync, <code>b</code> will be focus owner. 1542 * 1543 * <p> Notice that realSync isn't guaranteed to work if recurring 1544 * actions occur, such as if during processing of some event 1545 * another request which may generate some events occurs. By 1546 * default, sync tries to perform as much as {@value MAX_ITERS} 1547 * cycles of event processing, allowing for roughly {@value 1548 * MAX_ITERS} additional requests. 1549 * 1550 * <p> For example, requestFocus() generates native request, which 1551 * generates one or two Java focus events, which then generate a 1552 * serie of paint events, a serie of Java focus events, which then 1553 * generate a serie of paint events which then are processed - 1554 * three cycles, minimum. 1555 * 1556 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1557 */ 1558 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1559 { 1560 if (EventQueue.isDispatchThread()) { 1561 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1562 } 1563 int bigLoop = 0; 1564 do { 1565 // Let's do sync first 1566 sync(); 1567 1568 // During the wait process, when we were processing incoming 1569 // events, we could have made some new request, which can 1570 // generate new events. Example: MapNotify/XSetInputFocus. 1571 // Therefore, we dispatch them as long as there is something 1572 // to dispatch. 1573 int iters = 0; 1574 while (iters < MIN_ITERS) { 1575 syncNativeQueue(timeout); 1576 iters++; 1577 } 1578 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1579 iters++; 1580 } 1581 if (iters >= MAX_ITERS) { 1582 throw new InfiniteLoop(); 1583 } 1584 1585 // native requests were dispatched by X/Window Manager or Windows 1586 // Moreover, we processed them all on Toolkit thread 1587 // Now wait while EDT processes them. 1588 // 1589 // During processing of some events (focus, for example), 1590 // some other events could have been generated. So, after 1591 // waitForIdle, we may end up with full EventQueue 1592 iters = 0; 1593 while (iters < MIN_ITERS) { 1594 waitForIdle(timeout); 1595 iters++; 1596 } 1597 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1598 iters++; 1599 } 1600 if (iters >= MAX_ITERS) { 1601 throw new InfiniteLoop(); 1602 } 1603 1604 bigLoop++; 1605 // Again, for Java events, it was simple to check for new Java 1606 // events by checking event queue, but what if Java events 1607 // resulted in native requests? Therefor, check native events again. 1608 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1609 } 1610 1611 /** 1612 * Platform toolkits need to implement this method to perform the 1613 * sync of the native queue. The method should wait until native 1614 * requests are processed, all native events are processed and 1615 * corresponding Java events are generated. Should return 1616 * <code>true</code> if some events were processed, 1617 * <code>false</code> otherwise. 1618 */ 1619 protected abstract boolean syncNativeQueue(final long timeout); 1620 1621 private boolean eventDispatched = false; 1622 private boolean queueEmpty = false; 1623 private final Object waitLock = "Wait Lock"; 1624 1625 static Method eqNoEvents; 1626 1627 private boolean isEQEmpty() { 1628 EventQueue queue = getSystemEventQueueImpl(); 1629 synchronized(SunToolkit.class) { 1630 if (eqNoEvents == null) { 1631 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null); 1632 } 1633 } 1634 try { 1635 return (Boolean)eqNoEvents.invoke(queue); 1636 } catch (Exception e) { 1637 e.printStackTrace(); 1638 return false; 1639 } 1640 } 1641 1642 /** 1643 * Waits for the Java event queue to empty. Ensures that all 1644 * events are processed (including paint events), and that if 1645 * recursive events were generated, they are also processed. 1646 * Should return <code>true</code> if more processing is 1647 * necessary, <code>false</code> otherwise. 1648 */ 1649 @SuppressWarnings("serial") 1650 protected final boolean waitForIdle(final long timeout) { 1651 flushPendingEvents(); 1652 boolean queueWasEmpty = isEQEmpty(); 1653 queueEmpty = false; 1654 eventDispatched = false; 1655 synchronized(waitLock) { 1656 postEvent(AppContext.getAppContext(), 1657 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1658 public void dispatch() { 1659 // Here we block EDT. It could have some 1660 // events, it should have dispatched them by 1661 // now. So native requests could have been 1662 // generated. First, dispatch them. Then, 1663 // flush Java events again. 1664 int iters = 0; 1665 while (iters < MIN_ITERS) { 1666 syncNativeQueue(timeout); 1667 iters++; 1668 } 1669 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1670 iters++; 1671 } 1672 flushPendingEvents(); 1673 1674 synchronized(waitLock) { 1675 queueEmpty = isEQEmpty(); 1676 eventDispatched = true; 1677 waitLock.notifyAll(); 1678 } 1679 } 1680 }); 1681 try { 1682 while (!eventDispatched) { 1683 waitLock.wait(); 1684 } 1685 } catch (InterruptedException ie) { 1686 return false; 1687 } 1688 } 1689 1690 try { 1691 Thread.sleep(MINIMAL_EDELAY); 1692 } catch (InterruptedException ie) { 1693 throw new RuntimeException("Interrupted"); 1694 } 1695 1696 flushPendingEvents(); 1697 1698 // Lock to force write-cache flush for queueEmpty. 1699 synchronized (waitLock) { 1700 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1701 } 1702 } 1703 1704 /** 1705 * Grabs the mouse input for the given window. The window must be 1706 * visible. The window or its children do not receive any 1707 * additional mouse events besides those targeted to them. All 1708 * other events will be dispatched as before - to the respective 1709 * targets. This Window will receive UngrabEvent when automatic 1710 * ungrab is about to happen. The event can be listened to by 1711 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1712 * UngrabEvent class for the list of conditions when ungrab is 1713 * about to happen. 1714 * @see UngrabEvent 1715 */ 1716 public abstract void grab(Window w); 1717 1718 /** 1719 * Forces ungrab. No event will be sent. 1720 */ 1721 public abstract void ungrab(Window w); 1722 1723 1724 /** 1725 * Locates the splash screen library in a platform dependent way and closes 1726 * the splash screen. Should be invoked on first top-level frame display. 1727 * @see java.awt.SplashScreen 1728 * @since 1.6 1729 */ 1730 public static native void closeSplashScreen(); 1731 1732 /* The following methods and variables are to support retrieving 1733 * desktop text anti-aliasing settings 1734 */ 1735 1736 /* Need an instance method because setDesktopProperty(..) is protected. */ 1737 private void fireDesktopFontPropertyChanges() { 1738 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1739 SunToolkit.getDesktopFontHints()); 1740 } 1741 1742 private static boolean checkedSystemAAFontSettings; 1743 private static boolean useSystemAAFontSettings; 1744 private static boolean lastExtraCondition = true; 1745 private static RenderingHints desktopFontHints; 1746 1747 /* Since Swing is the reason for this "extra condition" logic its 1748 * worth documenting it in some detail. 1749 * First, a goal is for Swing and applications to both retrieve and 1750 * use the same desktop property value so that there is complete 1751 * consistency between the settings used by JDK's Swing implementation 1752 * and 3rd party custom Swing components, custom L&Fs and any general 1753 * text rendering that wants to be consistent with these. 1754 * But by default on Solaris & Linux Swing will not use AA text over 1755 * remote X11 display (unless Xrender can be used which is TBD and may not 1756 * always be available anyway) as that is a noticeable performance hit. 1757 * So there needs to be a way to express that extra condition so that 1758 * it is seen by all clients of the desktop property API. 1759 * If this were the only condition it could be handled here as it would 1760 * be the same for any L&F and could reasonably be considered to be 1761 * a static behaviour of those systems. 1762 * But GTK currently has an additional test based on locale which is 1763 * not applied by Metal. So mixing GTK in a few locales with Metal 1764 * would mean the last one wins. 1765 * This could be stored per-app context which would work 1766 * for different applets, but wouldn't help for a single application 1767 * using GTK and some other L&F concurrently. 1768 * But it is expected this will be addressed within GTK and the font 1769 * system so is a temporary and somewhat unlikely harmless corner case. 1770 */ 1771 public static void setAAFontSettingsCondition(boolean extraCondition) { 1772 if (extraCondition != lastExtraCondition) { 1773 lastExtraCondition = extraCondition; 1774 if (checkedSystemAAFontSettings) { 1775 /* Someone already asked for this info, under a different 1776 * condition. 1777 * We'll force re-evaluation instead of replicating the 1778 * logic, then notify any listeners of any change. 1779 */ 1780 checkedSystemAAFontSettings = false; 1781 Toolkit tk = Toolkit.getDefaultToolkit(); 1782 if (tk instanceof SunToolkit) { 1783 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1784 } 1785 } 1786 } 1787 } 1788 1789 /* "false", "off", ""default" aren't explicitly tested, they 1790 * just fall through to produce a null return which all are equated to 1791 * "false". 1792 */ 1793 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1794 Object aaHint = null; 1795 hintname = hintname.toLowerCase(Locale.ENGLISH); 1796 if (hintname.equals("on")) { 1797 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1798 } else if (hintname.equals("gasp")) { 1799 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1800 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1801 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1802 } else if (hintname.equals("lcd_hbgr")) { 1803 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1804 } else if (hintname.equals("lcd_vrgb")) { 1805 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1806 } else if (hintname.equals("lcd_vbgr")) { 1807 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1808 } 1809 if (aaHint != null) { 1810 RenderingHints map = new RenderingHints(null); 1811 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1812 return map; 1813 } else { 1814 return null; 1815 } 1816 } 1817 1818 /* This method determines whether to use the system font settings, 1819 * or ignore them if a L&F has specified they should be ignored, or 1820 * to override both of these with a system property specified value. 1821 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1822 * system property isn't applied as desktop properties are considered 1823 * to be inapplicable in that case. In that headless case although 1824 * this method will return "true" the toolkit will return a null map. 1825 */ 1826 private static boolean useSystemAAFontSettings() { 1827 if (!checkedSystemAAFontSettings) { 1828 useSystemAAFontSettings = true; /* initially set this true */ 1829 String systemAAFonts = null; 1830 Toolkit tk = Toolkit.getDefaultToolkit(); 1831 if (tk instanceof SunToolkit) { 1832 systemAAFonts = 1833 AccessController.doPrivileged( 1834 new GetPropertyAction("awt.useSystemAAFontSettings")); 1835 } 1836 if (systemAAFonts != null) { 1837 useSystemAAFontSettings = 1838 Boolean.valueOf(systemAAFonts).booleanValue(); 1839 /* If it is anything other than "true", then it may be 1840 * a hint name , or it may be "off, "default", etc. 1841 */ 1842 if (!useSystemAAFontSettings) { 1843 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1844 } 1845 } 1846 /* If its still true, apply the extra condition */ 1847 if (useSystemAAFontSettings) { 1848 useSystemAAFontSettings = lastExtraCondition; 1849 } 1850 checkedSystemAAFontSettings = true; 1851 } 1852 return useSystemAAFontSettings; 1853 } 1854 1855 /* A variable defined for the convenience of JDK code */ 1856 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1857 1858 /* Overridden by subclasses to return platform/desktop specific values */ 1859 protected RenderingHints getDesktopAAHints() { 1860 return null; 1861 } 1862 1863 /* Subclass desktop property loading methods call this which 1864 * in turn calls the appropriate subclass implementation of 1865 * getDesktopAAHints() when system settings are being used. 1866 * Its public rather than protected because subclasses may delegate 1867 * to a helper class. 1868 */ 1869 public static RenderingHints getDesktopFontHints() { 1870 if (useSystemAAFontSettings()) { 1871 Toolkit tk = Toolkit.getDefaultToolkit(); 1872 if (tk instanceof SunToolkit) { 1873 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1874 return (RenderingHints)map; 1875 } else { /* Headless Toolkit */ 1876 return null; 1877 } 1878 } else if (desktopFontHints != null) { 1879 /* cloning not necessary as the return value is cloned later, but 1880 * its harmless. 1881 */ 1882 return (RenderingHints)(desktopFontHints.clone()); 1883 } else { 1884 return null; 1885 } 1886 } 1887 1888 1889 public abstract boolean isDesktopSupported(); 1890 1891 /* 1892 * consumeNextKeyTyped() method is not currently used, 1893 * however Swing could use it in the future. 1894 */ 1895 private static Method consumeNextKeyTypedMethod = null; 1896 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1897 if (consumeNextKeyTypedMethod == null) { 1898 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class, 1899 "consumeNextKeyTyped", 1900 new Class<?>[] {KeyEvent.class}); 1901 } 1902 try { 1903 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(), 1904 keyEvent); 1905 } catch (IllegalAccessException iae) { 1906 iae.printStackTrace(); 1907 } catch (InvocationTargetException ite) { 1908 ite.printStackTrace(); 1909 } 1910 } 1911 1912 protected static void dumpPeers(final PlatformLogger aLog) { 1913 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1914 } 1915 1916 /** 1917 * Returns the <code>Window</code> ancestor of the component <code>comp</code>. 1918 * @return Window ancestor of the component or component by itself if it is Window; 1919 * null, if component is not a part of window hierarchy 1920 */ 1921 public static Window getContainingWindow(Component comp) { 1922 while (comp != null && !(comp instanceof Window)) { 1923 comp = comp.getParent(); 1924 } 1925 return (Window)comp; 1926 } 1927 1928 /** 1929 * Returns the value of the system property indicated by the specified key. 1930 */ 1931 public static String getSystemProperty(final String key) { 1932 return AccessController.doPrivileged(new PrivilegedAction<String>() { 1933 public String run() { 1934 return System.getProperty(key); 1935 } 1936 }); 1937 } 1938 1939 /** 1940 * Returns the boolean value of the system property indicated by the specified key. 1941 */ 1942 protected static Boolean getBooleanSystemProperty(String key) { 1943 return AccessController.doPrivileged(new GetBooleanAction(key)); 1944 } 1945 1946 private static Boolean sunAwtDisableMixing = null; 1947 1948 /** 1949 * Returns the value of "sun.awt.disableMixing" property. Default 1950 * value is {@code false}. 1951 */ 1952 public synchronized static boolean getSunAwtDisableMixing() { 1953 if (sunAwtDisableMixing == null) { 1954 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing"); 1955 } 1956 return sunAwtDisableMixing.booleanValue(); 1957 } 1958 1959 /** 1960 * Returns true if the native GTK libraries are available. The 1961 * default implementation returns false, but UNIXToolkit overrides this 1962 * method to provide a more specific answer. 1963 */ 1964 public boolean isNativeGTKAvailable() { 1965 return false; 1966 } 1967 1968 // Cosntant alpha 1969 public boolean isWindowOpacitySupported() { 1970 return false; 1971 } 1972 1973 // Shaping 1974 public boolean isWindowShapingSupported() { 1975 return false; 1976 } 1977 1978 // Per-pixel alpha 1979 public boolean isWindowTranslucencySupported() { 1980 return false; 1981 } 1982 1983 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1984 return false; 1985 } 1986 1987 /** 1988 * Returns true if swing backbuffer should be translucent. 1989 */ 1990 public boolean isSwingBackbufferTranslucencySupported() { 1991 return false; 1992 } 1993 1994 /** 1995 * Returns whether or not a containing top level window for the passed 1996 * component is 1997 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1998 * 1999 * @param c a Component which toplevel's to check 2000 * @return {@code true} if the passed component is not null and has a 2001 * containing toplevel window which is opaque (so per-pixel translucency 2002 * is not enabled), {@code false} otherwise 2003 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 2004 */ 2005 public static boolean isContainingTopLevelOpaque(Component c) { 2006 Window w = getContainingWindow(c); 2007 return w != null && w.isOpaque(); 2008 } 2009 2010 /** 2011 * Returns whether or not a containing top level window for the passed 2012 * component is 2013 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 2014 * 2015 * @param c a Component which toplevel's to check 2016 * @return {@code true} if the passed component is not null and has a 2017 * containing toplevel window which has opacity less than 2018 * 1.0f (which means that it is translucent), {@code false} otherwise 2019 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 2020 */ 2021 public static boolean isContainingTopLevelTranslucent(Component c) { 2022 Window w = getContainingWindow(c); 2023 return w != null && w.getOpacity() < 1.0f; 2024 } 2025 2026 /** 2027 * Returns whether the native system requires using the peer.updateWindow() 2028 * method to update the contents of a non-opaque window, or if usual 2029 * painting procedures are sufficient. The default return value covers 2030 * the X11 systems. On MS Windows this method is overriden in WToolkit 2031 * to return true. 2032 */ 2033 public boolean needUpdateWindow() { 2034 return false; 2035 } 2036 2037 /** 2038 * Descendants of the SunToolkit should override and put their own logic here. 2039 */ 2040 public int getNumberOfButtons(){ 2041 return 3; 2042 } 2043 2044 /** 2045 * Checks that the given object implements/extends the given 2046 * interface/class. 2047 * 2048 * Note that using the instanceof operator causes a class to be loaded. 2049 * Using this method doesn't load a class and it can be used instead of 2050 * the instanceof operator for performance reasons. 2051 * 2052 * @param obj Object to be checked 2053 * @param type The name of the interface/class. Must be 2054 * fully-qualified interface/class name. 2055 * @return true, if this object implements/extends the given 2056 * interface/class, false, otherwise, or if obj or type is null 2057 */ 2058 public static boolean isInstanceOf(Object obj, String type) { 2059 if (obj == null) return false; 2060 if (type == null) return false; 2061 2062 return isInstanceOf(obj.getClass(), type); 2063 } 2064 2065 private static boolean isInstanceOf(Class<?> cls, String type) { 2066 if (cls == null) return false; 2067 2068 if (cls.getName().equals(type)) { 2069 return true; 2070 } 2071 2072 for (Class<?> c : cls.getInterfaces()) { 2073 if (c.getName().equals(type)) { 2074 return true; 2075 } 2076 } 2077 return isInstanceOf(cls.getSuperclass(), type); 2078 } 2079 2080 /////////////////////////////////////////////////////////////////////////// 2081 // 2082 // The following methods help set and identify whether a particular 2083 // AWTEvent object was produced by the system or by user code. As of this 2084 // writing the only consumer is the Java Plug-In, although this information 2085 // could be useful to more clients and probably should be formalized in 2086 // the public API. 2087 // 2088 /////////////////////////////////////////////////////////////////////////// 2089 2090 public static void setSystemGenerated(AWTEvent e) { 2091 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2092 } 2093 2094 public static boolean isSystemGenerated(AWTEvent e) { 2095 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2096 } 2097 2098 } // class SunToolkit 2099 2100 2101 /* 2102 * PostEventQueue is a Thread that runs in the same AppContext as the 2103 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2104 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2105 * events to this queue, which then calls EventQueue.postEvent(). 2106 * 2107 * We do this because EventQueue.postEvent() may be overridden by client 2108 * code, and we mustn't ever call client code from the toolkit thread. 2109 */ 2110 class PostEventQueue { 2111 private EventQueueItem queueHead = null; 2112 private EventQueueItem queueTail = null; 2113 private final EventQueue eventQueue; 2114 2115 // For the case when queue is cleared but events are not posted 2116 private volatile boolean isFlushing = false; 2117 2118 PostEventQueue(EventQueue eq) { 2119 eventQueue = eq; 2120 } 2121 2122 public synchronized boolean noEvents() { 2123 return queueHead == null && !isFlushing; 2124 } 2125 2126 /* 2127 * Continually post pending AWTEvents to the Java EventQueue. The method 2128 * is synchronized to ensure the flush is completed before a new event 2129 * can be posted to this queue. 2130 * 2131 * 7177040: The method couldn't be wholly synchronized because of calls 2132 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could 2133 * potentially lead to deadlock 2134 */ 2135 public void flush() { 2136 EventQueueItem tempQueue; 2137 synchronized (this) { 2138 tempQueue = queueHead; 2139 queueHead = queueTail = null; 2140 isFlushing = true; 2141 } 2142 try { 2143 while (tempQueue != null) { 2144 eventQueue.postEvent(tempQueue.event); 2145 tempQueue = tempQueue.next; 2146 } 2147 } 2148 finally { 2149 isFlushing = false; 2150 } 2151 } 2152 2153 /* 2154 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2155 */ 2156 void postEvent(AWTEvent event) { 2157 EventQueueItem item = new EventQueueItem(event); 2158 2159 synchronized (this) { 2160 if (queueHead == null) { 2161 queueHead = queueTail = item; 2162 } else { 2163 queueTail.next = item; 2164 queueTail = item; 2165 } 2166 } 2167 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2168 } 2169 } // class PostEventQueue