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