1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package sun.awt; 27 28 import java.awt.*; 29 import static java.awt.RenderingHints.*; 30 import java.awt.dnd.*; 31 import java.awt.dnd.peer.DragSourceContextPeer; 32 import java.awt.peer.*; 33 import java.awt.event.WindowEvent; 34 import java.awt.event.KeyEvent; 35 import java.awt.image.*; 36 import java.awt.TrayIcon; 37 import java.awt.SystemTray; 38 import java.awt.event.InputEvent; 39 import java.net.URL; 40 import java.util.*; 41 import java.util.concurrent.TimeUnit; 42 import java.util.concurrent.locks.Condition; 43 import java.util.concurrent.locks.Lock; 44 import java.util.concurrent.locks.ReentrantLock; 45 46 import sun.security.util.SecurityConstants; 47 import sun.util.logging.PlatformLogger; 48 import sun.misc.SoftCache; 49 import sun.font.FontDesignMetrics; 50 import sun.awt.im.InputContext; 51 import sun.awt.image.*; 52 import sun.security.action.GetPropertyAction; 53 import sun.security.action.GetBooleanAction; 54 import java.lang.reflect.Field; 55 import java.lang.reflect.Method; 56 import java.lang.reflect.Constructor; 57 import java.lang.reflect.InvocationTargetException; 58 import java.security.AccessController; 59 import java.security.PrivilegedAction; 60 import java.security.PrivilegedActionException; 61 import java.security.PrivilegedExceptionAction; 62 63 public abstract class SunToolkit extends Toolkit 64 implements WindowClosingSupport, WindowClosingListener, 65 ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 66 67 private static final PlatformLogger log = PlatformLogger.getLogger("sun.awt.SunToolkit"); 68 69 /* Load debug settings for native code */ 70 static { 71 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) { 72 DebugSettings.init(); 73 } 74 }; 75 76 /** 77 * Special mask for the UngrabEvent events, in addition to the 78 * public masks defined in AWTEvent. Should be used as the mask 79 * value for Toolkit.addAWTEventListener. 80 */ 81 public static final int GRAB_EVENT_MASK = 0x80000000; 82 83 private static Method wakeupMethod; 84 /* The key to put()/get() the PostEventQueue into/from the AppContext. 85 */ 86 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 87 88 /** 89 * Number of buttons. 90 * By default it's taken from the system. If system value does not 91 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 92 */ 93 protected static int numberOfButtons = 0; 94 95 96 /* XFree standard mention 24 buttons as maximum: 97 * http://www.xfree86.org/current/mouse.4.html 98 * We workaround systems supporting more than 24 buttons. 99 * Otherwise, we have to use long type values as masks 100 * which leads to API change. 101 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 102 * the 4-bytes limit for the int type. (CR 6799099) 103 * One more bit is reserved for FIRST_HIGH_BIT. 104 */ 105 public final static int MAX_BUTTONS_SUPPORTED = 20; 106 107 private static void initEQ(AppContext appContext) { 108 EventQueue eventQueue; 109 110 String eqName = System.getProperty("AWT.EventQueueClass", 111 "java.awt.EventQueue"); 112 113 try { 114 eventQueue = (EventQueue)Class.forName(eqName).newInstance(); 115 } catch (Exception e) { 116 e.printStackTrace(); 117 System.err.println("Failed loading " + eqName + ": " + e); 118 eventQueue = new EventQueue(); 119 } 120 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 121 122 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 123 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 124 } 125 126 public SunToolkit() { 127 // 7122796: Always create an EQ for the main AppContext 128 initEQ(AppContext.getMainAppContext()); 129 } 130 131 public boolean useBufferPerWindow() { 132 return false; 133 } 134 135 public abstract WindowPeer createWindow(Window target) 136 throws HeadlessException; 137 138 public abstract FramePeer createFrame(Frame target) 139 throws HeadlessException; 140 141 public abstract DialogPeer createDialog(Dialog target) 142 throws HeadlessException; 143 144 public abstract ButtonPeer createButton(Button target) 145 throws HeadlessException; 146 147 public abstract TextFieldPeer createTextField(TextField target) 148 throws HeadlessException; 149 150 public abstract ChoicePeer createChoice(Choice target) 151 throws HeadlessException; 152 153 public abstract LabelPeer createLabel(Label target) 154 throws HeadlessException; 155 156 public abstract ListPeer createList(java.awt.List target) 157 throws HeadlessException; 158 159 public abstract CheckboxPeer createCheckbox(Checkbox target) 160 throws HeadlessException; 161 162 public abstract ScrollbarPeer createScrollbar(Scrollbar target) 163 throws HeadlessException; 164 165 public abstract ScrollPanePeer createScrollPane(ScrollPane target) 166 throws HeadlessException; 167 168 public abstract TextAreaPeer createTextArea(TextArea target) 169 throws HeadlessException; 170 171 public abstract FileDialogPeer createFileDialog(FileDialog target) 172 throws HeadlessException; 173 174 public abstract MenuBarPeer createMenuBar(MenuBar target) 175 throws HeadlessException; 176 177 public abstract MenuPeer createMenu(Menu target) 178 throws HeadlessException; 179 180 public abstract PopupMenuPeer createPopupMenu(PopupMenu target) 181 throws HeadlessException; 182 183 public abstract MenuItemPeer createMenuItem(MenuItem target) 184 throws HeadlessException; 185 186 public abstract CheckboxMenuItemPeer createCheckboxMenuItem( 187 CheckboxMenuItem target) 188 throws HeadlessException; 189 190 public abstract DragSourceContextPeer createDragSourceContextPeer( 191 DragGestureEvent dge) 192 throws InvalidDnDOperationException; 193 194 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 195 throws HeadlessException, AWTException; 196 197 public abstract SystemTrayPeer createSystemTray(SystemTray target); 198 199 public abstract boolean isTraySupported(); 200 201 @SuppressWarnings("deprecation") 202 public abstract FontPeer getFontPeer(String name, int style); 203 204 public abstract RobotPeer createRobot(Robot target, GraphicsDevice screen) 205 throws AWTException; 206 207 public abstract KeyboardFocusManagerPeer createKeyboardFocusManagerPeer(KeyboardFocusManager manager) 208 throws HeadlessException; 209 210 /** 211 * The AWT lock is typically only used on Unix platforms to synchronize 212 * access to Xlib, OpenGL, etc. However, these methods are implemented 213 * in SunToolkit so that they can be called from shared code (e.g. 214 * from the OGL pipeline) or from the X11 pipeline regardless of whether 215 * XToolkit or MToolkit is currently in use. There are native macros 216 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 217 * methods is changed, make sure it is compatible with the native macros. 218 * 219 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 220 * used in place of: 221 * synchronized (getAWTLock()) { 222 * ... 223 * } 224 * 225 * By factoring these methods out specially, we are able to change the 226 * implementation of these methods (e.g. use more advanced locking 227 * mechanisms) without impacting calling code. 228 * 229 * Sample usage: 230 * private void doStuffWithXlib() { 231 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 232 * SunToolkit.awtLock(); 233 * try { 234 * ... 235 * XlibWrapper.XDoStuff(); 236 * } finally { 237 * SunToolkit.awtUnlock(); 238 * } 239 * } 240 */ 241 242 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 243 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 244 245 public static final void awtLock() { 246 AWT_LOCK.lock(); 247 } 248 249 public static final boolean awtTryLock() { 250 return AWT_LOCK.tryLock(); 251 } 252 253 public static final void awtUnlock() { 254 AWT_LOCK.unlock(); 255 } 256 257 public static final void awtLockWait() 258 throws InterruptedException 259 { 260 AWT_LOCK_COND.await(); 261 } 262 263 public static final void awtLockWait(long timeout) 264 throws InterruptedException 265 { 266 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 267 } 268 269 public static final void awtLockNotify() { 270 AWT_LOCK_COND.signal(); 271 } 272 273 public static final void awtLockNotifyAll() { 274 AWT_LOCK_COND.signalAll(); 275 } 276 277 public static final boolean isAWTLockHeldByCurrentThread() { 278 return AWT_LOCK.isHeldByCurrentThread(); 279 } 280 281 /* 282 * Create a new AppContext, along with its EventQueue, for a 283 * new ThreadGroup. Browser code, for example, would use this 284 * method to create an AppContext & EventQueue for an Applet. 285 */ 286 public static AppContext createNewAppContext() { 287 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 288 // Create appContext before initialization of EventQueue, so all 289 // the calls to AppContext.getAppContext() from EventQueue ctor 290 // return correct values 291 AppContext appContext = new AppContext(threadGroup); 292 293 initEQ(appContext); 294 295 return appContext; 296 } 297 298 public static Field getField(final Class<?> klass, final String fieldName) { 299 return AccessController.doPrivileged(new PrivilegedAction<Field>() { 300 public Field run() { 301 try { 302 Field field = klass.getDeclaredField(fieldName); 303 assert (field != null); 304 field.setAccessible(true); 305 return field; 306 } catch (SecurityException e) { 307 assert false; 308 } catch (NoSuchFieldException e) { 309 assert false; 310 } 311 return null; 312 }//run 313 }); 314 } 315 316 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 317 if (wakeupMethod == null){ 318 wakeupMethod = AccessController.doPrivileged(new PrivilegedAction<Method>() { 319 public Method run() { 320 try { 321 Method method = EventQueue.class.getDeclaredMethod("wakeup",new Class [] {Boolean.TYPE} ); 322 if (method != null) { 323 method.setAccessible(true); 324 } 325 return method; 326 } catch (NoSuchMethodException e) { 327 assert false; 328 } catch (SecurityException e) { 329 assert false; 330 } 331 return null; 332 }//run 333 }); 334 } 335 try{ 336 if (wakeupMethod != null){ 337 wakeupMethod.invoke(q, new Object[]{Boolean.valueOf(isShutdown)}); 338 } 339 } catch (InvocationTargetException e){ 340 assert false; 341 } catch (IllegalAccessException e) { 342 assert false; 343 } 344 } 345 346 /* 347 * Fetch the peer associated with the given target (as specified 348 * in the peer creation method). This can be used to determine 349 * things like what the parent peer is. If the target is null 350 * or the target can't be found (either because the a peer was 351 * never created for it or the peer was disposed), a null will 352 * be returned. 353 */ 354 protected static Object targetToPeer(Object target) { 355 if (target != null && !GraphicsEnvironment.isHeadless()) { 356 return AWTAutoShutdown.getInstance().getPeer(target); 357 } 358 return null; 359 } 360 361 protected static void targetCreatedPeer(Object target, Object peer) { 362 if (target != null && peer != null && 363 !GraphicsEnvironment.isHeadless()) 364 { 365 AWTAutoShutdown.getInstance().registerPeer(target, peer); 366 } 367 } 368 369 protected static void targetDisposedPeer(Object target, Object peer) { 370 if (target != null && peer != null && 371 !GraphicsEnvironment.isHeadless()) 372 { 373 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 374 } 375 } 376 377 // Maps from non-Component/MenuComponent to AppContext. 378 // WeakHashMap<Component,AppContext> 379 private static final Map<Object, AppContext> appContextMap = 380 Collections.synchronizedMap(new WeakHashMap<Object, AppContext>()); 381 382 /** 383 * Sets the appContext field of target. If target is not a Component or 384 * MenuComponent, this returns false. 385 */ 386 private static boolean setAppContext(Object target, 387 AppContext context) { 388 if (target instanceof Component) { 389 AWTAccessor.getComponentAccessor(). 390 setAppContext((Component)target, context); 391 } else if (target instanceof MenuComponent) { 392 AWTAccessor.getMenuComponentAccessor(). 393 setAppContext((MenuComponent)target, context); 394 } else { 395 return false; 396 } 397 return true; 398 } 399 400 /** 401 * Returns the appContext field for target. If target is not a 402 * Component or MenuComponent this returns null. 403 */ 404 private static AppContext getAppContext(Object target) { 405 if (target instanceof Component) { 406 return AWTAccessor.getComponentAccessor(). 407 getAppContext((Component)target); 408 } else if (target instanceof MenuComponent) { 409 return AWTAccessor.getMenuComponentAccessor(). 410 getAppContext((MenuComponent)target); 411 } else { 412 return null; 413 } 414 } 415 416 /* 417 * Fetch the AppContext associated with the given target. 418 * This can be used to determine things like which EventQueue 419 * to use for posting events to a Component. If the target is 420 * null or the target can't be found, a null with be returned. 421 */ 422 public static AppContext targetToAppContext(Object target) { 423 if (target == null || GraphicsEnvironment.isHeadless()) { 424 return null; 425 } 426 AppContext context = getAppContext(target); 427 if (context == null) { 428 // target is not a Component/MenuComponent, try the 429 // appContextMap. 430 context = appContextMap.get(target); 431 } 432 return context; 433 } 434 435 /** 436 * Sets the synchronous status of focus requests on lightweight 437 * components in the specified window to the specified value. 438 * If the boolean parameter is <code>true</code> then the focus 439 * requests on lightweight components will be performed 440 * synchronously, if it is <code>false</code>, then asynchronously. 441 * By default, all windows have their lightweight request status 442 * set to asynchronous. 443 * <p> 444 * The application can only set the status of lightweight focus 445 * requests to synchronous for any of its windows if it doesn't 446 * perform focus transfers between different heavyweight containers. 447 * In this case the observable focus behaviour is the same as with 448 * asynchronous status. 449 * <p> 450 * If the application performs focus transfer between different 451 * heavyweight containers and sets the lightweight focus request 452 * status to synchronous for any of its windows, then further focus 453 * behaviour is unspecified. 454 * <p> 455 * @param w window for which the lightweight focus request status 456 * should be set 457 * @param status the value of lightweight focus request status 458 */ 459 460 public static void setLWRequestStatus(Window changed,boolean status){ 461 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 462 }; 463 464 public static void checkAndSetPolicy(Container cont) { 465 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager. 466 getCurrentKeyboardFocusManager(). 467 getDefaultFocusTraversalPolicy(); 468 469 cont.setFocusTraversalPolicy(defaultPolicy); 470 } 471 472 private static FocusTraversalPolicy createLayoutPolicy() { 473 FocusTraversalPolicy policy = null; 474 try { 475 Class<?> layoutPolicyClass = 476 Class.forName("javax.swing.LayoutFocusTraversalPolicy"); 477 policy = (FocusTraversalPolicy)layoutPolicyClass.newInstance(); 478 } 479 catch (ClassNotFoundException e) { 480 assert false; 481 } 482 catch (InstantiationException e) { 483 assert false; 484 } 485 catch (IllegalAccessException e) { 486 assert false; 487 } 488 489 return policy; 490 } 491 492 /* 493 * Insert a mapping from target to AppContext, for later retrieval 494 * via targetToAppContext() above. 495 */ 496 public static void insertTargetMapping(Object target, AppContext appContext) { 497 if (!GraphicsEnvironment.isHeadless()) { 498 if (!setAppContext(target, appContext)) { 499 // Target is not a Component/MenuComponent, use the private Map 500 // instead. 501 appContextMap.put(target, appContext); 502 } 503 } 504 } 505 506 /* 507 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 508 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 509 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 510 * not be called under another lock since it locks the EventQueue. 511 * See bugids 4632918, 4526597. 512 */ 513 public static void postEvent(AppContext appContext, AWTEvent event) { 514 if (event == null) { 515 throw new NullPointerException(); 516 } 517 // All events posted via this method are system-generated. 518 // Placing the following call here reduces considerably the 519 // number of places throughout the toolkit that would 520 // otherwise have to be modified to precisely identify 521 // system-generated events. 522 setSystemGenerated(event); 523 AppContext eventContext = targetToAppContext(event.getSource()); 524 if (eventContext != null && !eventContext.equals(appContext)) { 525 log.fine("Event posted on wrong app context : " + event); 526 } 527 PostEventQueue postEventQueue = 528 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 529 if (postEventQueue != null) { 530 postEventQueue.postEvent(event); 531 } 532 } 533 534 /* 535 * Post AWTEvent of high priority. 536 */ 537 public static void postPriorityEvent(final AWTEvent e) { 538 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 539 public void run() { 540 AWTAccessor.getAWTEventAccessor().setPosted(e); 541 ((Component)e.getSource()).dispatchEvent(e); 542 } 543 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 544 postEvent(targetToAppContext(e.getSource()), pe); 545 } 546 547 /* 548 * Flush any pending events which haven't been posted to the AWT 549 * EventQueue yet. 550 */ 551 public static void flushPendingEvents() { 552 AppContext appContext = AppContext.getAppContext(); 553 flushPendingEvents(appContext); 554 } 555 556 /* 557 * Flush the PostEventQueue for the right AppContext. 558 * The default flushPendingEvents only flushes the thread-local context, 559 * which is not always correct, c.f. 3746956 560 */ 561 public static void flushPendingEvents(AppContext appContext) { 562 PostEventQueue postEventQueue = 563 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 564 if (postEventQueue != null) { 565 postEventQueue.flush(); 566 } 567 } 568 569 /* 570 * Execute a chunk of code on the Java event handler thread for the 571 * given target. Does not wait for the execution to occur before 572 * returning to the caller. 573 */ 574 public static void executeOnEventHandlerThread(Object target, 575 Runnable runnable) { 576 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 577 } 578 579 /* 580 * Fixed 5064013: the InvocationEvent time should be equals 581 * the time of the ActionEvent 582 */ 583 @SuppressWarnings("serial") 584 public static void executeOnEventHandlerThread(Object target, 585 Runnable runnable, 586 final long when) { 587 executeOnEventHandlerThread( 588 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 589 public long getWhen() { 590 return when; 591 } 592 }); 593 } 594 595 /* 596 * Execute a chunk of code on the Java event handler thread for the 597 * given target. Does not wait for the execution to occur before 598 * returning to the caller. 599 */ 600 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 601 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 602 } 603 604 /* 605 * Execute a chunk of code on the Java event handler thread. The 606 * method takes into account provided AppContext and sets 607 * <code>SunToolkit.getDefaultToolkit()</code> as a target of the 608 * event. See 6451487 for detailes. 609 * Does not wait for the execution to occur before returning to 610 * the caller. 611 */ 612 public static void invokeLaterOnAppContext( 613 AppContext appContext, Runnable dispatcher) 614 { 615 postEvent(appContext, 616 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 617 PeerEvent.PRIORITY_EVENT)); 618 } 619 620 /* 621 * Execute a chunk of code on the Java event handler thread for the 622 * given target. Waits for the execution to occur before returning 623 * to the caller. 624 */ 625 public static void executeOnEDTAndWait(Object target, Runnable runnable) 626 throws InterruptedException, InvocationTargetException 627 { 628 if (EventQueue.isDispatchThread()) { 629 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 630 } 631 632 class AWTInvocationLock {} 633 Object lock = new AWTInvocationLock(); 634 635 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 636 637 synchronized (lock) { 638 executeOnEventHandlerThread(event); 639 while(!event.isDispatched()) { 640 lock.wait(); 641 } 642 } 643 644 Throwable eventThrowable = event.getThrowable(); 645 if (eventThrowable != null) { 646 throw new InvocationTargetException(eventThrowable); 647 } 648 } 649 650 /* 651 * Returns true if the calling thread is the event dispatch thread 652 * contained within AppContext which associated with the given target. 653 * Use this call to ensure that a given task is being executed 654 * (or not being) on the event dispatch thread for the given target. 655 */ 656 public static boolean isDispatchThreadForAppContext(Object target) { 657 AppContext appContext = targetToAppContext(target); 658 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 659 660 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 661 return accessor.isDispatchThreadImpl(eq); 662 } 663 664 public Dimension getScreenSize() { 665 return new Dimension(getScreenWidth(), getScreenHeight()); 666 } 667 protected abstract int getScreenWidth(); 668 protected abstract int getScreenHeight(); 669 670 @SuppressWarnings("deprecation") 671 public FontMetrics getFontMetrics(Font font) { 672 return FontDesignMetrics.getMetrics(font); 673 } 674 675 @SuppressWarnings("deprecation") 676 public String[] getFontList() { 677 String[] hardwiredFontList = { 678 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 679 Font.DIALOG_INPUT 680 681 // -- Obsolete font names from 1.0.2. It was decided that 682 // -- getFontList should not return these old names: 683 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 684 }; 685 return hardwiredFontList; 686 } 687 688 public PanelPeer createPanel(Panel target) { 689 return (PanelPeer)createComponent(target); 690 } 691 692 public CanvasPeer createCanvas(Canvas target) { 693 return (CanvasPeer)createComponent(target); 694 } 695 696 /** 697 * Disables erasing of background on the canvas before painting if 698 * this is supported by the current toolkit. It is recommended to 699 * call this method early, before the Canvas becomes displayable, 700 * because some Toolkit implementations do not support changing 701 * this property once the Canvas becomes displayable. 702 */ 703 public void disableBackgroundErase(Canvas canvas) { 704 disableBackgroundEraseImpl(canvas); 705 } 706 707 /** 708 * Disables the native erasing of the background on the given 709 * component before painting if this is supported by the current 710 * toolkit. This only has an effect for certain components such as 711 * Canvas, Panel and Window. It is recommended to call this method 712 * early, before the Component becomes displayable, because some 713 * Toolkit implementations do not support changing this property 714 * once the Component becomes displayable. 715 */ 716 public void disableBackgroundErase(Component component) { 717 disableBackgroundEraseImpl(component); 718 } 719 720 private void disableBackgroundEraseImpl(Component component) { 721 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 722 } 723 724 /** 725 * Returns the value of "sun.awt.noerasebackground" property. Default 726 * value is {@code false}. 727 */ 728 public static boolean getSunAwtNoerasebackground() { 729 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 730 } 731 732 /** 733 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 734 * value is {@code false}. 735 */ 736 public static boolean getSunAwtErasebackgroundonresize() { 737 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 738 } 739 740 741 static final SoftCache imgCache = new SoftCache(); 742 743 static Image getImageFromHash(Toolkit tk, URL url) { 744 SecurityManager sm = System.getSecurityManager(); 745 if (sm != null) { 746 try { 747 java.security.Permission perm = 748 url.openConnection().getPermission(); 749 if (perm != null) { 750 try { 751 sm.checkPermission(perm); 752 } catch (SecurityException se) { 753 // fallback to checkRead/checkConnect for pre 1.2 754 // security managers 755 if ((perm instanceof java.io.FilePermission) && 756 perm.getActions().indexOf("read") != -1) { 757 sm.checkRead(perm.getName()); 758 } else if ((perm instanceof 759 java.net.SocketPermission) && 760 perm.getActions().indexOf("connect") != -1) { 761 sm.checkConnect(url.getHost(), url.getPort()); 762 } else { 763 throw se; 764 } 765 } 766 } 767 } catch (java.io.IOException ioe) { 768 sm.checkConnect(url.getHost(), url.getPort()); 769 } 770 } 771 synchronized (imgCache) { 772 Image img = (Image)imgCache.get(url); 773 if (img == null) { 774 try { 775 img = tk.createImage(new URLImageSource(url)); 776 imgCache.put(url, img); 777 } catch (Exception e) { 778 } 779 } 780 return img; 781 } 782 } 783 784 static Image getImageFromHash(Toolkit tk, 785 String filename) { 786 SecurityManager security = System.getSecurityManager(); 787 if (security != null) { 788 security.checkRead(filename); 789 } 790 synchronized (imgCache) { 791 Image img = (Image)imgCache.get(filename); 792 if (img == null) { 793 try { 794 img = tk.createImage(new FileImageSource(filename)); 795 imgCache.put(filename, img); 796 } catch (Exception e) { 797 } 798 } 799 return img; 800 } 801 } 802 803 public Image getImage(String filename) { 804 return getImageFromHash(this, filename); 805 } 806 807 public Image getImage(URL url) { 808 return getImageFromHash(this, url); 809 } 810 811 public Image createImage(String filename) { 812 SecurityManager security = System.getSecurityManager(); 813 if (security != null) { 814 security.checkRead(filename); 815 } 816 return createImage(new FileImageSource(filename)); 817 } 818 819 public Image createImage(URL url) { 820 SecurityManager sm = System.getSecurityManager(); 821 if (sm != null) { 822 try { 823 java.security.Permission perm = 824 url.openConnection().getPermission(); 825 if (perm != null) { 826 try { 827 sm.checkPermission(perm); 828 } catch (SecurityException se) { 829 // fallback to checkRead/checkConnect for pre 1.2 830 // security managers 831 if ((perm instanceof java.io.FilePermission) && 832 perm.getActions().indexOf("read") != -1) { 833 sm.checkRead(perm.getName()); 834 } else if ((perm instanceof 835 java.net.SocketPermission) && 836 perm.getActions().indexOf("connect") != -1) { 837 sm.checkConnect(url.getHost(), url.getPort()); 838 } else { 839 throw se; 840 } 841 } 842 } 843 } catch (java.io.IOException ioe) { 844 sm.checkConnect(url.getHost(), url.getPort()); 845 } 846 } 847 return createImage(new URLImageSource(url)); 848 } 849 850 public Image createImage(byte[] data, int offset, int length) { 851 return createImage(new ByteArrayImageSource(data, offset, length)); 852 } 853 854 public Image createImage(ImageProducer producer) { 855 return new ToolkitImage(producer); 856 } 857 858 public int checkImage(Image img, int w, int h, ImageObserver o) { 859 if (!(img instanceof ToolkitImage)) { 860 return ImageObserver.ALLBITS; 861 } 862 863 ToolkitImage tkimg = (ToolkitImage)img; 864 int repbits; 865 if (w == 0 || h == 0) { 866 repbits = ImageObserver.ALLBITS; 867 } else { 868 repbits = tkimg.getImageRep().check(o); 869 } 870 return tkimg.check(o) | repbits; 871 } 872 873 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 874 if (w == 0 || h == 0) { 875 return true; 876 } 877 878 // Must be a ToolkitImage 879 if (!(img instanceof ToolkitImage)) { 880 return true; 881 } 882 883 ToolkitImage tkimg = (ToolkitImage)img; 884 if (tkimg.hasError()) { 885 if (o != null) { 886 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 887 -1, -1, -1, -1); 888 } 889 return false; 890 } 891 ImageRepresentation ir = tkimg.getImageRep(); 892 return ir.prepare(o); 893 } 894 895 /** 896 * Scans {@code imageList} for best-looking image of specified dimensions. 897 * Image can be scaled and/or padded with transparency. 898 */ 899 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) { 900 if (width == 0 || height == 0) { 901 return null; 902 } 903 Image bestImage = null; 904 int bestWidth = 0; 905 int bestHeight = 0; 906 double bestSimilarity = 3; //Impossibly high value 907 double bestScaleFactor = 0; 908 for (Iterator<Image> i = imageList.iterator();i.hasNext();) { 909 //Iterate imageList looking for best matching image. 910 //'Similarity' measure is defined as good scale factor and small insets. 911 //best possible similarity is 0 (no scale, no insets). 912 //It's found while the experiments that good-looking result is achieved 913 //with scale factors x1, x3/4, x2/3, xN, x1/N. 914 Image im = i.next(); 915 if (im == null) { 916 if (log.isLoggable(PlatformLogger.FINER)) { 917 log.finer("SunToolkit.getScaledIconImage: " + 918 "Skipping the image passed into Java because it's null."); 919 } 920 continue; 921 } 922 if (im instanceof ToolkitImage) { 923 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 924 ir.reconstruct(ImageObserver.ALLBITS); 925 } 926 int iw; 927 int ih; 928 try { 929 iw = im.getWidth(null); 930 ih = im.getHeight(null); 931 } catch (Exception e){ 932 if (log.isLoggable(PlatformLogger.FINER)) { 933 log.finer("SunToolkit.getScaledIconImage: " + 934 "Perhaps the image passed into Java is broken. Skipping this icon."); 935 } 936 continue; 937 } 938 if (iw > 0 && ih > 0) { 939 //Calc scale factor 940 double scaleFactor = Math.min((double)width / (double)iw, 941 (double)height / (double)ih); 942 //Calculate scaled image dimensions 943 //adjusting scale factor to nearest "good" value 944 int adjw = 0; 945 int adjh = 0; 946 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 947 if (scaleFactor >= 2) { 948 //Need to enlarge image more than twice 949 //Round down scale factor to multiply by integer value 950 scaleFactor = Math.floor(scaleFactor); 951 adjw = iw * (int)scaleFactor; 952 adjh = ih * (int)scaleFactor; 953 scaleMeasure = 1.0 - 0.5 / scaleFactor; 954 } else if (scaleFactor >= 1) { 955 //Don't scale 956 scaleFactor = 1.0; 957 adjw = iw; 958 adjh = ih; 959 scaleMeasure = 0; 960 } else if (scaleFactor >= 0.75) { 961 //Multiply by 3/4 962 scaleFactor = 0.75; 963 adjw = iw * 3 / 4; 964 adjh = ih * 3 / 4; 965 scaleMeasure = 0.3; 966 } else if (scaleFactor >= 0.6666) { 967 //Multiply by 2/3 968 scaleFactor = 0.6666; 969 adjw = iw * 2 / 3; 970 adjh = ih * 2 / 3; 971 scaleMeasure = 0.33; 972 } else { 973 //Multiply size by 1/scaleDivider 974 //where scaleDivider is minimum possible integer 975 //larger than 1/scaleFactor 976 double scaleDivider = Math.ceil(1.0 / scaleFactor); 977 scaleFactor = 1.0 / scaleDivider; 978 adjw = (int)Math.round((double)iw / scaleDivider); 979 adjh = (int)Math.round((double)ih / scaleDivider); 980 scaleMeasure = 1.0 - 1.0 / scaleDivider; 981 } 982 double similarity = ((double)width - (double)adjw) / (double)width + 983 ((double)height - (double)adjh) / (double)height + //Large padding is bad 984 scaleMeasure; //Large rescale is bad 985 if (similarity < bestSimilarity) { 986 bestSimilarity = similarity; 987 bestScaleFactor = scaleFactor; 988 bestImage = im; 989 bestWidth = adjw; 990 bestHeight = adjh; 991 } 992 if (similarity == 0) break; 993 } 994 } 995 if (bestImage == null) { 996 //No images were found, possibly all are broken 997 return null; 998 } 999 BufferedImage bimage = 1000 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 1001 Graphics2D g = bimage.createGraphics(); 1002 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 1003 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 1004 try { 1005 int x = (width - bestWidth) / 2; 1006 int y = (height - bestHeight) / 2; 1007 if (log.isLoggable(PlatformLogger.FINER)) { 1008 log.finer("WWindowPeer.getScaledIconData() result : " + 1009 "w : " + width + " h : " + height + 1010 " iW : " + bestImage.getWidth(null) + " iH : " + bestImage.getHeight(null) + 1011 " sim : " + bestSimilarity + " sf : " + bestScaleFactor + 1012 " adjW : " + bestWidth + " adjH : " + bestHeight + 1013 " x : " + x + " y : " + y); 1014 } 1015 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 1016 } finally { 1017 g.dispose(); 1018 } 1019 return bimage; 1020 } 1021 1022 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1023 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1024 if (bimage == null) { 1025 if (log.isLoggable(PlatformLogger.FINER)) { 1026 log.finer("SunToolkit.getScaledIconData: " + 1027 "Perhaps the image passed into Java is broken. Skipping this icon."); 1028 } 1029 return null; 1030 } 1031 Raster raster = bimage.getRaster(); 1032 DataBuffer buffer = raster.getDataBuffer(); 1033 return (DataBufferInt)buffer; 1034 } 1035 1036 protected EventQueue getSystemEventQueueImpl() { 1037 return getSystemEventQueueImplPP(); 1038 } 1039 1040 // Package private implementation 1041 static EventQueue getSystemEventQueueImplPP() { 1042 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1043 } 1044 1045 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1046 EventQueue theEventQueue = 1047 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1048 return theEventQueue; 1049 } 1050 1051 /** 1052 * Give native peers the ability to query the native container 1053 * given a native component (eg the direct parent may be lightweight). 1054 */ 1055 public static Container getNativeContainer(Component c) { 1056 return Toolkit.getNativeContainer(c); 1057 } 1058 1059 /** 1060 * Gives native peers the ability to query the closest HW component. 1061 * If the given component is heavyweight, then it returns this. Otherwise, 1062 * it goes one level up in the hierarchy and tests next component. 1063 */ 1064 public static Component getHeavyweightComponent(Component c) { 1065 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1066 c = AWTAccessor.getComponentAccessor().getParent(c); 1067 } 1068 return c; 1069 } 1070 1071 /** 1072 * Returns key modifiers used by Swing to set up a focus accelerator key stroke. 1073 */ 1074 public int getFocusAcceleratorKeyMask() { 1075 return InputEvent.ALT_MASK; 1076 } 1077 1078 /** 1079 * Tests whether specified key modifiers mask can be used to enter a printable 1080 * character. This is a default implementation of this method, which reflects 1081 * the way things work on Windows: here, pressing ctrl + alt allows user to enter 1082 * characters from the extended character set (like euro sign or math symbols) 1083 */ 1084 public boolean isPrintableCharacterModifiersMask(int mods) { 1085 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK)); 1086 } 1087 1088 /** 1089 * Returns whether popup is allowed to be shown above the task bar. 1090 * This is a default implementation of this method, which checks 1091 * corresponding security permission. 1092 */ 1093 public boolean canPopupOverlapTaskBar() { 1094 boolean result = true; 1095 try { 1096 SecurityManager sm = System.getSecurityManager(); 1097 if (sm != null) { 1098 sm.checkPermission( 1099 SecurityConstants.AWT.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION); 1100 } 1101 } catch (SecurityException se) { 1102 // There is no permission to show popups over the task bar 1103 result = false; 1104 } 1105 return result; 1106 } 1107 1108 /** 1109 * Returns a new input method window, with behavior as specified in 1110 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1111 * If the inputContext is not null, the window should return it from its 1112 * getInputContext() method. The window needs to implement 1113 * sun.awt.im.InputMethodWindow. 1114 * <p> 1115 * SunToolkit subclasses can override this method to return better input 1116 * method windows. 1117 */ 1118 public Window createInputMethodWindow(String title, InputContext context) { 1119 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1120 } 1121 1122 /** 1123 * Returns whether enableInputMethods should be set to true for peered 1124 * TextComponent instances on this platform. False by default. 1125 */ 1126 public boolean enableInputMethodsForTextComponent() { 1127 return false; 1128 } 1129 1130 private static Locale startupLocale = null; 1131 1132 /** 1133 * Returns the locale in which the runtime was started. 1134 */ 1135 public static Locale getStartupLocale() { 1136 if (startupLocale == null) { 1137 String language, region, country, variant; 1138 language = AccessController.doPrivileged( 1139 new GetPropertyAction("user.language", "en")); 1140 // for compatibility, check for old user.region property 1141 region = AccessController.doPrivileged( 1142 new GetPropertyAction("user.region")); 1143 if (region != null) { 1144 // region can be of form country, country_variant, or _variant 1145 int i = region.indexOf('_'); 1146 if (i >= 0) { 1147 country = region.substring(0, i); 1148 variant = region.substring(i + 1); 1149 } else { 1150 country = region; 1151 variant = ""; 1152 } 1153 } else { 1154 country = AccessController.doPrivileged( 1155 new GetPropertyAction("user.country", "")); 1156 variant = AccessController.doPrivileged( 1157 new GetPropertyAction("user.variant", "")); 1158 } 1159 startupLocale = new Locale(language, country, variant); 1160 } 1161 return startupLocale; 1162 } 1163 1164 /** 1165 * Returns the default keyboard locale of the underlying operating system 1166 */ 1167 public Locale getDefaultKeyboardLocale() { 1168 return getStartupLocale(); 1169 } 1170 1171 private static String dataTransfererClassName = null; 1172 1173 protected static void setDataTransfererClassName(String className) { 1174 dataTransfererClassName = className; 1175 } 1176 1177 public static String getDataTransfererClassName() { 1178 if (dataTransfererClassName == null) { 1179 Toolkit.getDefaultToolkit(); // transferer set during toolkit init 1180 } 1181 return dataTransfererClassName; 1182 } 1183 1184 // Support for window closing event notifications 1185 private transient WindowClosingListener windowClosingListener = null; 1186 /** 1187 * @see sun.awt.WindowClosingSupport#getWindowClosingListener 1188 */ 1189 public WindowClosingListener getWindowClosingListener() { 1190 return windowClosingListener; 1191 } 1192 /** 1193 * @see sun.awt.WindowClosingSupport#setWindowClosingListener 1194 */ 1195 public void setWindowClosingListener(WindowClosingListener wcl) { 1196 windowClosingListener = wcl; 1197 } 1198 1199 /** 1200 * @see sun.awt.WindowClosingListener#windowClosingNotify 1201 */ 1202 public RuntimeException windowClosingNotify(WindowEvent event) { 1203 if (windowClosingListener != null) { 1204 return windowClosingListener.windowClosingNotify(event); 1205 } else { 1206 return null; 1207 } 1208 } 1209 /** 1210 * @see sun.awt.WindowClosingListener#windowClosingDelivered 1211 */ 1212 public RuntimeException windowClosingDelivered(WindowEvent event) { 1213 if (windowClosingListener != null) { 1214 return windowClosingListener.windowClosingDelivered(event); 1215 } else { 1216 return null; 1217 } 1218 } 1219 1220 private static DefaultMouseInfoPeer mPeer = null; 1221 1222 protected synchronized MouseInfoPeer getMouseInfoPeer() { 1223 if (mPeer == null) { 1224 mPeer = new DefaultMouseInfoPeer(); 1225 } 1226 return mPeer; 1227 } 1228 1229 1230 /** 1231 * Returns whether default toolkit needs the support of the xembed 1232 * from embedding host(if any). 1233 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1234 */ 1235 public static boolean needsXEmbed() { 1236 String noxembed = AccessController. 1237 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1238 if ("true".equals(noxembed)) { 1239 return false; 1240 } 1241 1242 Toolkit tk = Toolkit.getDefaultToolkit(); 1243 if (tk instanceof SunToolkit) { 1244 // SunToolkit descendants should override this method to specify 1245 // concrete behavior 1246 return ((SunToolkit)tk).needsXEmbedImpl(); 1247 } else { 1248 // Non-SunToolkit doubtly might support XEmbed 1249 return false; 1250 } 1251 } 1252 1253 /** 1254 * Returns whether this toolkit needs the support of the xembed 1255 * from embedding host(if any). 1256 * @return <code>true</code>, if XEmbed is needed, <code>false</code> otherwise 1257 */ 1258 protected boolean needsXEmbedImpl() { 1259 return false; 1260 } 1261 1262 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1263 1264 /** 1265 * Returns whether the XEmbed server feature is requested by 1266 * developer. If true, Toolkit should return an 1267 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1268 */ 1269 protected final boolean isXEmbedServerRequested() { 1270 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1271 } 1272 1273 /** 1274 * Returns whether the modal exclusion API is supported by the current toolkit. 1275 * When it isn't supported, calling <code>setModalExcluded</code> has no 1276 * effect, and <code>isModalExcluded</code> returns false for all windows. 1277 * 1278 * @return true if modal exclusion is supported by the toolkit, false otherwise 1279 * 1280 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1281 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1282 * 1283 * @since 1.5 1284 */ 1285 public static boolean isModalExcludedSupported() 1286 { 1287 Toolkit tk = Toolkit.getDefaultToolkit(); 1288 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1289 } 1290 /* 1291 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1292 * 1293 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1294 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1295 * 1296 * @since 1.5 1297 */ 1298 protected boolean isModalExcludedSupportedImpl() 1299 { 1300 return false; 1301 } 1302 1303 /* 1304 * Sets this window to be excluded from being modally blocked. When the 1305 * toolkit supports modal exclusion and this method is called, input 1306 * events, focus transfer and z-order will continue to work for the 1307 * window, it's owned windows and child components, even in the 1308 * presence of a modal dialog. 1309 * For details on which <code>Window</code>s are normally blocked 1310 * by modal dialog, see {@link java.awt.Dialog}. 1311 * Invoking this method when the modal exclusion API is not supported by 1312 * the current toolkit has no effect. 1313 * @param window Window to be marked as not modally blocked 1314 * @see java.awt.Dialog 1315 * @see java.awt.Dialog#setModal(boolean) 1316 * @see sun.awt.SunToolkit#isModalExcludedSupported 1317 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1318 */ 1319 public static void setModalExcluded(Window window) 1320 { 1321 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1322 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1323 } 1324 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1325 } 1326 1327 /* 1328 * Returns whether the specified window is blocked by modal dialogs. 1329 * If the modal exclusion API isn't supported by the current toolkit, 1330 * it returns false for all windows. 1331 * 1332 * @param window Window to test for modal exclusion 1333 * 1334 * @return true if the window is modal excluded, false otherwise. If 1335 * the modal exclusion isn't supported by the current Toolkit, false 1336 * is returned 1337 * 1338 * @see sun.awt.SunToolkit#isModalExcludedSupported 1339 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1340 * 1341 * @since 1.5 1342 */ 1343 public static boolean isModalExcluded(Window window) 1344 { 1345 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1346 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1347 } 1348 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1349 } 1350 1351 /** 1352 * Overridden in XToolkit and WToolkit 1353 */ 1354 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1355 return (modalityType == Dialog.ModalityType.MODELESS) || 1356 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1357 } 1358 1359 /** 1360 * Overridden in XToolkit and WToolkit 1361 */ 1362 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1363 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1364 } 1365 1366 /////////////////////////////////////////////////////////////////////////// 1367 // 1368 // The following is used by the Java Plug-in to coordinate dialog modality 1369 // between containing applications (browsers, ActiveX containers etc) and 1370 // the AWT. 1371 // 1372 /////////////////////////////////////////////////////////////////////////// 1373 1374 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1375 1376 public void addModalityListener(ModalityListener listener) { 1377 modalityListeners.add(listener); 1378 } 1379 1380 public void removeModalityListener(ModalityListener listener) { 1381 modalityListeners.remove(listener); 1382 } 1383 1384 public void notifyModalityPushed(Dialog dialog) { 1385 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1386 } 1387 1388 public void notifyModalityPopped(Dialog dialog) { 1389 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1390 } 1391 1392 final void notifyModalityChange(int id, Dialog source) { 1393 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1394 ev.dispatch(); 1395 } 1396 1397 static class ModalityListenerList implements ModalityListener { 1398 1399 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1400 1401 void add(ModalityListener listener) { 1402 listeners.addElement(listener); 1403 } 1404 1405 void remove(ModalityListener listener) { 1406 listeners.removeElement(listener); 1407 } 1408 1409 public void modalityPushed(ModalityEvent ev) { 1410 Iterator<ModalityListener> it = listeners.iterator(); 1411 while (it.hasNext()) { 1412 it.next().modalityPushed(ev); 1413 } 1414 } 1415 1416 public void modalityPopped(ModalityEvent ev) { 1417 Iterator<ModalityListener> it = listeners.iterator(); 1418 while (it.hasNext()) { 1419 it.next().modalityPopped(ev); 1420 } 1421 } 1422 } // end of class ModalityListenerList 1423 1424 /////////////////////////////////////////////////////////////////////////// 1425 // End Plug-in code 1426 /////////////////////////////////////////////////////////////////////////// 1427 1428 public static boolean isLightweightOrUnknown(Component comp) { 1429 if (comp.isLightweight() 1430 || !(getDefaultToolkit() instanceof SunToolkit)) 1431 { 1432 return true; 1433 } 1434 return !(comp instanceof Button 1435 || comp instanceof Canvas 1436 || comp instanceof Checkbox 1437 || comp instanceof Choice 1438 || comp instanceof Label 1439 || comp instanceof java.awt.List 1440 || comp instanceof Panel 1441 || comp instanceof Scrollbar 1442 || comp instanceof ScrollPane 1443 || comp instanceof TextArea 1444 || comp instanceof TextField 1445 || comp instanceof Window); 1446 } 1447 1448 public static Method getMethod(final Class<?> clz, final String methodName, final Class[] params) { 1449 Method res = null; 1450 try { 1451 res = AccessController.doPrivileged(new PrivilegedExceptionAction<Method>() { 1452 public Method run() throws Exception { 1453 Method m = clz.getDeclaredMethod(methodName, params); 1454 m.setAccessible(true); 1455 return m; 1456 } 1457 }); 1458 } catch (PrivilegedActionException ex) { 1459 ex.printStackTrace(); 1460 } 1461 return res; 1462 } 1463 1464 @SuppressWarnings("serial") 1465 public static class OperationTimedOut extends RuntimeException { 1466 public OperationTimedOut(String msg) { 1467 super(msg); 1468 } 1469 public OperationTimedOut() { 1470 } 1471 } 1472 1473 @SuppressWarnings("serial") 1474 public static class InfiniteLoop extends RuntimeException { 1475 } 1476 1477 @SuppressWarnings("serial") 1478 public static class IllegalThreadException extends RuntimeException { 1479 public IllegalThreadException(String msg) { 1480 super(msg); 1481 } 1482 public IllegalThreadException() { 1483 } 1484 } 1485 1486 public static final int DEFAULT_WAIT_TIME = 10000; 1487 private static final int MAX_ITERS = 20; 1488 private static final int MIN_ITERS = 0; 1489 private static final int MINIMAL_EDELAY = 0; 1490 1491 /** 1492 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1493 */ 1494 public void realSync() throws OperationTimedOut, InfiniteLoop { 1495 realSync(DEFAULT_WAIT_TIME); 1496 } 1497 1498 /** 1499 * Forces toolkit to synchronize with the native windowing 1500 * sub-system, flushing all pending work and waiting for all the 1501 * events to be processed. This method guarantees that after 1502 * return no additional Java events will be generated, unless 1503 * cause by user. Obviously, the method cannot be used on the 1504 * event dispatch thread (EDT). In case it nevertheless gets 1505 * invoked on this thread, the method throws the 1506 * IllegalThreadException runtime exception. 1507 * 1508 * <p> This method allows to write tests without explicit timeouts 1509 * or wait for some event. Example: 1510 * <code> 1511 * Frame f = ...; 1512 * f.setVisible(true); 1513 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1514 * </code> 1515 * 1516 * <p> After realSync, <code>f</code> will be completely visible 1517 * on the screen, its getLocationOnScreen will be returning the 1518 * right result and it will be the focus owner. 1519 * 1520 * <p> Another example: 1521 * <code> 1522 * b.requestFocus(); 1523 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1524 * </code> 1525 * 1526 * <p> After realSync, <code>b</code> will be focus owner. 1527 * 1528 * <p> Notice that realSync isn't guaranteed to work if recurring 1529 * actions occur, such as if during processing of some event 1530 * another request which may generate some events occurs. By 1531 * default, sync tries to perform as much as {@value MAX_ITERS} 1532 * cycles of event processing, allowing for roughly {@value 1533 * MAX_ITERS} additional requests. 1534 * 1535 * <p> For example, requestFocus() generates native request, which 1536 * generates one or two Java focus events, which then generate a 1537 * serie of paint events, a serie of Java focus events, which then 1538 * generate a serie of paint events which then are processed - 1539 * three cycles, minimum. 1540 * 1541 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1542 */ 1543 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1544 { 1545 if (EventQueue.isDispatchThread()) { 1546 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1547 } 1548 int bigLoop = 0; 1549 do { 1550 // Let's do sync first 1551 sync(); 1552 1553 // During the wait process, when we were processing incoming 1554 // events, we could have made some new request, which can 1555 // generate new events. Example: MapNotify/XSetInputFocus. 1556 // Therefore, we dispatch them as long as there is something 1557 // to dispatch. 1558 int iters = 0; 1559 while (iters < MIN_ITERS) { 1560 syncNativeQueue(timeout); 1561 iters++; 1562 } 1563 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1564 iters++; 1565 } 1566 if (iters >= MAX_ITERS) { 1567 throw new InfiniteLoop(); 1568 } 1569 1570 // native requests were dispatched by X/Window Manager or Windows 1571 // Moreover, we processed them all on Toolkit thread 1572 // Now wait while EDT processes them. 1573 // 1574 // During processing of some events (focus, for example), 1575 // some other events could have been generated. So, after 1576 // waitForIdle, we may end up with full EventQueue 1577 iters = 0; 1578 while (iters < MIN_ITERS) { 1579 waitForIdle(timeout); 1580 iters++; 1581 } 1582 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1583 iters++; 1584 } 1585 if (iters >= MAX_ITERS) { 1586 throw new InfiniteLoop(); 1587 } 1588 1589 bigLoop++; 1590 // Again, for Java events, it was simple to check for new Java 1591 // events by checking event queue, but what if Java events 1592 // resulted in native requests? Therefor, check native events again. 1593 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1594 } 1595 1596 /** 1597 * Platform toolkits need to implement this method to perform the 1598 * sync of the native queue. The method should wait until native 1599 * requests are processed, all native events are processed and 1600 * corresponding Java events are generated. Should return 1601 * <code>true</code> if some events were processed, 1602 * <code>false</code> otherwise. 1603 */ 1604 protected abstract boolean syncNativeQueue(final long timeout); 1605 1606 private boolean eventDispatched = false; 1607 private boolean queueEmpty = false; 1608 private final Object waitLock = "Wait Lock"; 1609 1610 static Method eqNoEvents; 1611 1612 private boolean isEQEmpty() { 1613 EventQueue queue = getSystemEventQueueImpl(); 1614 synchronized(SunToolkit.class) { 1615 if (eqNoEvents == null) { 1616 eqNoEvents = getMethod(java.awt.EventQueue.class, "noEvents", null); 1617 } 1618 } 1619 try { 1620 return (Boolean)eqNoEvents.invoke(queue); 1621 } catch (Exception e) { 1622 e.printStackTrace(); 1623 return false; 1624 } 1625 } 1626 1627 /** 1628 * Waits for the Java event queue to empty. Ensures that all 1629 * events are processed (including paint events), and that if 1630 * recursive events were generated, they are also processed. 1631 * Should return <code>true</code> if more processing is 1632 * necessary, <code>false</code> otherwise. 1633 */ 1634 @SuppressWarnings("serial") 1635 protected final boolean waitForIdle(final long timeout) { 1636 flushPendingEvents(); 1637 boolean queueWasEmpty = isEQEmpty(); 1638 queueEmpty = false; 1639 eventDispatched = false; 1640 synchronized(waitLock) { 1641 postEvent(AppContext.getAppContext(), 1642 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1643 public void dispatch() { 1644 // Here we block EDT. It could have some 1645 // events, it should have dispatched them by 1646 // now. So native requests could have been 1647 // generated. First, dispatch them. Then, 1648 // flush Java events again. 1649 int iters = 0; 1650 while (iters < MIN_ITERS) { 1651 syncNativeQueue(timeout); 1652 iters++; 1653 } 1654 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1655 iters++; 1656 } 1657 flushPendingEvents(); 1658 1659 synchronized(waitLock) { 1660 queueEmpty = isEQEmpty(); 1661 eventDispatched = true; 1662 waitLock.notifyAll(); 1663 } 1664 } 1665 }); 1666 try { 1667 while (!eventDispatched) { 1668 waitLock.wait(); 1669 } 1670 } catch (InterruptedException ie) { 1671 return false; 1672 } 1673 } 1674 1675 try { 1676 Thread.sleep(MINIMAL_EDELAY); 1677 } catch (InterruptedException ie) { 1678 throw new RuntimeException("Interrupted"); 1679 } 1680 1681 flushPendingEvents(); 1682 1683 // Lock to force write-cache flush for queueEmpty. 1684 synchronized (waitLock) { 1685 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1686 } 1687 } 1688 1689 /** 1690 * Grabs the mouse input for the given window. The window must be 1691 * visible. The window or its children do not receive any 1692 * additional mouse events besides those targeted to them. All 1693 * other events will be dispatched as before - to the respective 1694 * targets. This Window will receive UngrabEvent when automatic 1695 * ungrab is about to happen. The event can be listened to by 1696 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1697 * UngrabEvent class for the list of conditions when ungrab is 1698 * about to happen. 1699 * @see UngrabEvent 1700 */ 1701 public abstract void grab(Window w); 1702 1703 /** 1704 * Forces ungrab. No event will be sent. 1705 */ 1706 public abstract void ungrab(Window w); 1707 1708 1709 /** 1710 * Locates the splash screen library in a platform dependent way and closes 1711 * the splash screen. Should be invoked on first top-level frame display. 1712 * @see java.awt.SplashScreen 1713 * @since 1.6 1714 */ 1715 public static native void closeSplashScreen(); 1716 1717 /* The following methods and variables are to support retrieving 1718 * desktop text anti-aliasing settings 1719 */ 1720 1721 /* Need an instance method because setDesktopProperty(..) is protected. */ 1722 private void fireDesktopFontPropertyChanges() { 1723 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1724 SunToolkit.getDesktopFontHints()); 1725 } 1726 1727 private static boolean checkedSystemAAFontSettings; 1728 private static boolean useSystemAAFontSettings; 1729 private static boolean lastExtraCondition = true; 1730 private static RenderingHints desktopFontHints; 1731 1732 /* Since Swing is the reason for this "extra condition" logic its 1733 * worth documenting it in some detail. 1734 * First, a goal is for Swing and applications to both retrieve and 1735 * use the same desktop property value so that there is complete 1736 * consistency between the settings used by JDK's Swing implementation 1737 * and 3rd party custom Swing components, custom L&Fs and any general 1738 * text rendering that wants to be consistent with these. 1739 * But by default on Solaris & Linux Swing will not use AA text over 1740 * remote X11 display (unless Xrender can be used which is TBD and may not 1741 * always be available anyway) as that is a noticeable performance hit. 1742 * So there needs to be a way to express that extra condition so that 1743 * it is seen by all clients of the desktop property API. 1744 * If this were the only condition it could be handled here as it would 1745 * be the same for any L&F and could reasonably be considered to be 1746 * a static behaviour of those systems. 1747 * But GTK currently has an additional test based on locale which is 1748 * not applied by Metal. So mixing GTK in a few locales with Metal 1749 * would mean the last one wins. 1750 * This could be stored per-app context which would work 1751 * for different applets, but wouldn't help for a single application 1752 * using GTK and some other L&F concurrently. 1753 * But it is expected this will be addressed within GTK and the font 1754 * system so is a temporary and somewhat unlikely harmless corner case. 1755 */ 1756 public static void setAAFontSettingsCondition(boolean extraCondition) { 1757 if (extraCondition != lastExtraCondition) { 1758 lastExtraCondition = extraCondition; 1759 if (checkedSystemAAFontSettings) { 1760 /* Someone already asked for this info, under a different 1761 * condition. 1762 * We'll force re-evaluation instead of replicating the 1763 * logic, then notify any listeners of any change. 1764 */ 1765 checkedSystemAAFontSettings = false; 1766 Toolkit tk = Toolkit.getDefaultToolkit(); 1767 if (tk instanceof SunToolkit) { 1768 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1769 } 1770 } 1771 } 1772 } 1773 1774 /* "false", "off", ""default" aren't explicitly tested, they 1775 * just fall through to produce a null return which all are equated to 1776 * "false". 1777 */ 1778 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1779 Object aaHint = null; 1780 hintname = hintname.toLowerCase(Locale.ENGLISH); 1781 if (hintname.equals("on")) { 1782 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1783 } else if (hintname.equals("gasp")) { 1784 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1785 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1786 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1787 } else if (hintname.equals("lcd_hbgr")) { 1788 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1789 } else if (hintname.equals("lcd_vrgb")) { 1790 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1791 } else if (hintname.equals("lcd_vbgr")) { 1792 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1793 } 1794 if (aaHint != null) { 1795 RenderingHints map = new RenderingHints(null); 1796 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1797 return map; 1798 } else { 1799 return null; 1800 } 1801 } 1802 1803 /* This method determines whether to use the system font settings, 1804 * or ignore them if a L&F has specified they should be ignored, or 1805 * to override both of these with a system property specified value. 1806 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1807 * system property isn't applied as desktop properties are considered 1808 * to be inapplicable in that case. In that headless case although 1809 * this method will return "true" the toolkit will return a null map. 1810 */ 1811 private static boolean useSystemAAFontSettings() { 1812 if (!checkedSystemAAFontSettings) { 1813 useSystemAAFontSettings = true; /* initially set this true */ 1814 String systemAAFonts = null; 1815 Toolkit tk = Toolkit.getDefaultToolkit(); 1816 if (tk instanceof SunToolkit) { 1817 systemAAFonts = 1818 AccessController.doPrivileged( 1819 new GetPropertyAction("awt.useSystemAAFontSettings")); 1820 } 1821 if (systemAAFonts != null) { 1822 useSystemAAFontSettings = 1823 Boolean.valueOf(systemAAFonts).booleanValue(); 1824 /* If it is anything other than "true", then it may be 1825 * a hint name , or it may be "off, "default", etc. 1826 */ 1827 if (!useSystemAAFontSettings) { 1828 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1829 } 1830 } 1831 /* If its still true, apply the extra condition */ 1832 if (useSystemAAFontSettings) { 1833 useSystemAAFontSettings = lastExtraCondition; 1834 } 1835 checkedSystemAAFontSettings = true; 1836 } 1837 return useSystemAAFontSettings; 1838 } 1839 1840 /* A variable defined for the convenience of JDK code */ 1841 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1842 1843 /* Overridden by subclasses to return platform/desktop specific values */ 1844 protected RenderingHints getDesktopAAHints() { 1845 return null; 1846 } 1847 1848 /* Subclass desktop property loading methods call this which 1849 * in turn calls the appropriate subclass implementation of 1850 * getDesktopAAHints() when system settings are being used. 1851 * Its public rather than protected because subclasses may delegate 1852 * to a helper class. 1853 */ 1854 public static RenderingHints getDesktopFontHints() { 1855 if (useSystemAAFontSettings()) { 1856 Toolkit tk = Toolkit.getDefaultToolkit(); 1857 if (tk instanceof SunToolkit) { 1858 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1859 return (RenderingHints)map; 1860 } else { /* Headless Toolkit */ 1861 return null; 1862 } 1863 } else if (desktopFontHints != null) { 1864 /* cloning not necessary as the return value is cloned later, but 1865 * its harmless. 1866 */ 1867 return (RenderingHints)(desktopFontHints.clone()); 1868 } else { 1869 return null; 1870 } 1871 } 1872 1873 1874 public abstract boolean isDesktopSupported(); 1875 1876 /* 1877 * consumeNextKeyTyped() method is not currently used, 1878 * however Swing could use it in the future. 1879 */ 1880 private static Method consumeNextKeyTypedMethod = null; 1881 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1882 if (consumeNextKeyTypedMethod == null) { 1883 consumeNextKeyTypedMethod = getMethod(DefaultKeyboardFocusManager.class, 1884 "consumeNextKeyTyped", 1885 new Class<?>[] {KeyEvent.class}); 1886 } 1887 try { 1888 consumeNextKeyTypedMethod.invoke(KeyboardFocusManager.getCurrentKeyboardFocusManager(), 1889 keyEvent); 1890 } catch (IllegalAccessException iae) { 1891 iae.printStackTrace(); 1892 } catch (InvocationTargetException ite) { 1893 ite.printStackTrace(); 1894 } 1895 } 1896 1897 protected static void dumpPeers(final PlatformLogger aLog) { 1898 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1899 } 1900 1901 /** 1902 * Returns the <code>Window</code> ancestor of the component <code>comp</code>. 1903 * @return Window ancestor of the component or component by itself if it is Window; 1904 * null, if component is not a part of window hierarchy 1905 */ 1906 public static Window getContainingWindow(Component comp) { 1907 while (comp != null && !(comp instanceof Window)) { 1908 comp = comp.getParent(); 1909 } 1910 return (Window)comp; 1911 } 1912 1913 /** 1914 * Returns the value of the system property indicated by the specified key. 1915 */ 1916 public static String getSystemProperty(final String key) { 1917 return AccessController.doPrivileged(new PrivilegedAction<String>() { 1918 public String run() { 1919 return System.getProperty(key); 1920 } 1921 }); 1922 } 1923 1924 /** 1925 * Returns the boolean value of the system property indicated by the specified key. 1926 */ 1927 protected static Boolean getBooleanSystemProperty(String key) { 1928 return AccessController.doPrivileged(new GetBooleanAction(key)); 1929 } 1930 1931 private static Boolean sunAwtDisableMixing = null; 1932 1933 /** 1934 * Returns the value of "sun.awt.disableMixing" property. Default 1935 * value is {@code false}. 1936 */ 1937 public synchronized static boolean getSunAwtDisableMixing() { 1938 if (sunAwtDisableMixing == null) { 1939 sunAwtDisableMixing = getBooleanSystemProperty("sun.awt.disableMixing"); 1940 } 1941 return sunAwtDisableMixing.booleanValue(); 1942 } 1943 1944 /** 1945 * Returns true if the native GTK libraries are available. The 1946 * default implementation returns false, but UNIXToolkit overrides this 1947 * method to provide a more specific answer. 1948 */ 1949 public boolean isNativeGTKAvailable() { 1950 return false; 1951 } 1952 1953 // Cosntant alpha 1954 public boolean isWindowOpacitySupported() { 1955 return false; 1956 } 1957 1958 // Shaping 1959 public boolean isWindowShapingSupported() { 1960 return false; 1961 } 1962 1963 // Per-pixel alpha 1964 public boolean isWindowTranslucencySupported() { 1965 return false; 1966 } 1967 1968 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1969 return false; 1970 } 1971 1972 /** 1973 * Returns true if swing backbuffer should be translucent. 1974 */ 1975 public boolean isSwingBackbufferTranslucencySupported() { 1976 return false; 1977 } 1978 1979 /** 1980 * Returns whether or not a containing top level window for the passed 1981 * component is 1982 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1983 * 1984 * @param c a Component which toplevel's to check 1985 * @return {@code true} if the passed component is not null and has a 1986 * containing toplevel window which is opaque (so per-pixel translucency 1987 * is not enabled), {@code false} otherwise 1988 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 1989 */ 1990 public static boolean isContainingTopLevelOpaque(Component c) { 1991 Window w = getContainingWindow(c); 1992 return w != null && w.isOpaque(); 1993 } 1994 1995 /** 1996 * Returns whether or not a containing top level window for the passed 1997 * component is 1998 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 1999 * 2000 * @param c a Component which toplevel's to check 2001 * @return {@code true} if the passed component is not null and has a 2002 * containing toplevel window which has opacity less than 2003 * 1.0f (which means that it is translucent), {@code false} otherwise 2004 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 2005 */ 2006 public static boolean isContainingTopLevelTranslucent(Component c) { 2007 Window w = getContainingWindow(c); 2008 return w != null && w.getOpacity() < 1.0f; 2009 } 2010 2011 /** 2012 * Returns whether the native system requires using the peer.updateWindow() 2013 * method to update the contents of a non-opaque window, or if usual 2014 * painting procedures are sufficient. The default return value covers 2015 * the X11 systems. On MS Windows this method is overriden in WToolkit 2016 * to return true. 2017 */ 2018 public boolean needUpdateWindow() { 2019 return false; 2020 } 2021 2022 /** 2023 * Descendants of the SunToolkit should override and put their own logic here. 2024 */ 2025 public int getNumberOfButtons(){ 2026 return 3; 2027 } 2028 2029 /** 2030 * Checks that the given object implements/extends the given 2031 * interface/class. 2032 * 2033 * Note that using the instanceof operator causes a class to be loaded. 2034 * Using this method doesn't load a class and it can be used instead of 2035 * the instanceof operator for performance reasons. 2036 * 2037 * @param obj Object to be checked 2038 * @param type The name of the interface/class. Must be 2039 * fully-qualified interface/class name. 2040 * @return true, if this object implements/extends the given 2041 * interface/class, false, otherwise, or if obj or type is null 2042 */ 2043 public static boolean isInstanceOf(Object obj, String type) { 2044 if (obj == null) return false; 2045 if (type == null) return false; 2046 2047 return isInstanceOf(obj.getClass(), type); 2048 } 2049 2050 private static boolean isInstanceOf(Class<?> cls, String type) { 2051 if (cls == null) return false; 2052 2053 if (cls.getName().equals(type)) { 2054 return true; 2055 } 2056 2057 for (Class<?> c : cls.getInterfaces()) { 2058 if (c.getName().equals(type)) { 2059 return true; 2060 } 2061 } 2062 return isInstanceOf(cls.getSuperclass(), type); 2063 } 2064 2065 /////////////////////////////////////////////////////////////////////////// 2066 // 2067 // The following methods help set and identify whether a particular 2068 // AWTEvent object was produced by the system or by user code. As of this 2069 // writing the only consumer is the Java Plug-In, although this information 2070 // could be useful to more clients and probably should be formalized in 2071 // the public API. 2072 // 2073 /////////////////////////////////////////////////////////////////////////// 2074 2075 public static void setSystemGenerated(AWTEvent e) { 2076 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2077 } 2078 2079 public static boolean isSystemGenerated(AWTEvent e) { 2080 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2081 } 2082 2083 } // class SunToolkit 2084 2085 2086 /* 2087 * PostEventQueue is a Thread that runs in the same AppContext as the 2088 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2089 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2090 * events to this queue, which then calls EventQueue.postEvent(). 2091 * 2092 * We do this because EventQueue.postEvent() may be overridden by client 2093 * code, and we mustn't ever call client code from the toolkit thread. 2094 */ 2095 class PostEventQueue { 2096 private EventQueueItem queueHead = null; 2097 private EventQueueItem queueTail = null; 2098 private final EventQueue eventQueue; 2099 2100 // For synchronization of flush() method call 2101 private boolean isFlushing = false; 2102 2103 // For elimination of recursion of flush() method call 2104 private final ThreadLocal<Boolean> isThreadLocalFlushing = new ThreadLocal<>(); 2105 2106 PostEventQueue(EventQueue eq) { 2107 eventQueue = eq; 2108 } 2109 2110 /* 2111 * Continually post pending AWTEvents to the Java EventQueue. The method 2112 * is synchronized to ensure the flush is completed before a new event 2113 * can be posted to this queue. 2114 * 2115 * 7177040: The method couldn't be wholly synchronized because of calls 2116 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could 2117 * potentially lead to deadlock 2118 */ 2119 public void flush() { 2120 Boolean b = isThreadLocalFlushing.get(); 2121 if (b != null && b) { 2122 return; 2123 } 2124 2125 isThreadLocalFlushing.set(true); 2126 try { 2127 EventQueueItem tempQueue; 2128 synchronized (this) { 2129 while (isFlushing) { 2130 wait(); 2131 } 2132 isFlushing = (queueHead != null); 2133 2134 tempQueue = queueHead; 2135 queueHead = queueTail = null; 2136 } 2137 while (tempQueue != null) { 2138 eventQueue.postEvent(tempQueue.event); 2139 tempQueue = tempQueue.next; 2140 } 2141 } 2142 catch (InterruptedException e) { 2143 } 2144 finally { 2145 synchronized (this) { 2146 isFlushing = false; 2147 notifyAll(); 2148 } 2149 } 2150 isThreadLocalFlushing.set(false); 2151 } 2152 2153 /* 2154 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2155 */ 2156 void postEvent(AWTEvent event) { 2157 EventQueueItem item = new EventQueueItem(event); 2158 2159 synchronized (this) { 2160 if (queueHead == null) { 2161 queueHead = queueTail = item; 2162 } else { 2163 queueTail.next = item; 2164 queueTail = item; 2165 } 2166 } 2167 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2168 } 2169 } // class PostEventQueue