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