1 /* 2 * Copyright (c) 1997, 2016, 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 java.awt.event.InputEvent; 30 import java.awt.event.KeyEvent; 31 import java.awt.event.WindowEvent; 32 import java.awt.image.BufferedImage; 33 import java.awt.image.ColorModel; 34 import java.awt.image.DataBuffer; 35 import java.awt.image.DataBufferInt; 36 import java.awt.image.ImageObserver; 37 import java.awt.image.ImageProducer; 38 import java.awt.image.Raster; 39 import java.awt.peer.FramePeer; 40 import java.awt.peer.KeyboardFocusManagerPeer; 41 import java.awt.peer.MouseInfoPeer; 42 import java.awt.peer.SystemTrayPeer; 43 import java.awt.peer.TrayIconPeer; 44 import java.io.File; 45 import java.io.IOException; 46 import java.io.InputStream; 47 import java.lang.reflect.InvocationTargetException; 48 import java.net.URL; 49 import java.security.AccessController; 50 import java.util.ArrayList; 51 import java.util.Collections; 52 import java.util.Iterator; 53 import java.util.Locale; 54 import java.util.Map; 55 import java.util.Vector; 56 import java.util.WeakHashMap; 57 import java.util.concurrent.TimeUnit; 58 import java.util.concurrent.locks.Condition; 59 import java.util.concurrent.locks.ReentrantLock; 60 61 import sun.awt.im.InputContext; 62 import sun.awt.image.ByteArrayImageSource; 63 import sun.awt.image.FileImageSource; 64 import sun.awt.image.ImageRepresentation; 65 import java.awt.image.MultiResolutionImage; 66 import sun.awt.image.MultiResolutionToolkitImage; 67 import sun.awt.image.ToolkitImage; 68 import sun.awt.image.URLImageSource; 69 import sun.font.FontDesignMetrics; 70 import sun.net.util.URLUtil; 71 import sun.security.action.GetBooleanAction; 72 import sun.security.action.GetPropertyAction; 73 import sun.util.logging.PlatformLogger; 74 75 import static java.awt.RenderingHints.*; 76 77 public abstract class SunToolkit extends Toolkit 78 implements ComponentFactory, InputMethodSupport, KeyboardFocusManagerPeerProvider { 79 80 // 8014718: logging has been removed from SunToolkit 81 82 /* Load debug settings for native code */ 83 static { 84 if (AccessController.doPrivileged(new GetBooleanAction("sun.awt.nativedebug"))) { DebugSettings.init()85 DebugSettings.init(); 86 } 87 touchKeyboardAutoShowIsEnabled = Boolean.valueOf( 88 GetPropertyAction.privilegedGetProperty( 89 "awt.touchKeyboardAutoShowIsEnabled", "true")); 90 }; 91 92 /** 93 * Special mask for the UngrabEvent events, in addition to the 94 * public masks defined in AWTEvent. Should be used as the mask 95 * value for Toolkit.addAWTEventListener. 96 */ 97 public static final int GRAB_EVENT_MASK = 0x80000000; 98 99 /* The key to put()/get() the PostEventQueue into/from the AppContext. 100 */ 101 private static final String POST_EVENT_QUEUE_KEY = "PostEventQueue"; 102 103 /** 104 * Number of buttons. 105 * By default it's taken from the system. If system value does not 106 * fit into int type range, use our own MAX_BUTTONS_SUPPORT value. 107 */ 108 protected static int numberOfButtons = 0; 109 110 111 /* XFree standard mention 24 buttons as maximum: 112 * http://www.xfree86.org/current/mouse.4.html 113 * We workaround systems supporting more than 24 buttons. 114 * Otherwise, we have to use long type values as masks 115 * which leads to API change. 116 * InputEvent.BUTTON_DOWN_MASK may contain only 21 masks due to 117 * the 4-bytes limit for the int type. (CR 6799099) 118 * One more bit is reserved for FIRST_HIGH_BIT. 119 */ 120 public static final int MAX_BUTTONS_SUPPORTED = 20; 121 122 /** 123 * Creates and initializes EventQueue instance for the specified 124 * AppContext. 125 * Note that event queue must be created from createNewAppContext() 126 * only in order to ensure that EventQueue constructor obtains 127 * the correct AppContext. 128 * @param appContext AppContext to associate with the event queue 129 */ initEQ(AppContext appContext)130 private static void initEQ(AppContext appContext) { 131 EventQueue eventQueue = new EventQueue(); 132 appContext.put(AppContext.EVENT_QUEUE_KEY, eventQueue); 133 134 PostEventQueue postEventQueue = new PostEventQueue(eventQueue); 135 appContext.put(POST_EVENT_QUEUE_KEY, postEventQueue); 136 } 137 SunToolkit()138 public SunToolkit() { 139 } 140 useBufferPerWindow()141 public boolean useBufferPerWindow() { 142 return false; 143 } 144 createLightweightFrame(LightweightFrame target)145 public abstract FramePeer createLightweightFrame(LightweightFrame target) 146 throws HeadlessException; 147 createTrayIcon(TrayIcon target)148 public abstract TrayIconPeer createTrayIcon(TrayIcon target) 149 throws HeadlessException, AWTException; 150 createSystemTray(SystemTray target)151 public abstract SystemTrayPeer createSystemTray(SystemTray target); 152 isTraySupported()153 public abstract boolean isTraySupported(); 154 155 @Override getKeyboardFocusManagerPeer()156 public abstract KeyboardFocusManagerPeer getKeyboardFocusManagerPeer() 157 throws HeadlessException; 158 159 /** 160 * The AWT lock is typically only used on Unix platforms to synchronize 161 * access to Xlib, OpenGL, etc. However, these methods are implemented 162 * in SunToolkit so that they can be called from shared code (e.g. 163 * from the OGL pipeline) or from the X11 pipeline regardless of whether 164 * XToolkit or MToolkit is currently in use. There are native macros 165 * (such as AWT_LOCK) defined in awt.h, so if the implementation of these 166 * methods is changed, make sure it is compatible with the native macros. 167 * 168 * Note: The following methods (awtLock(), awtUnlock(), etc) should be 169 * used in place of: 170 * synchronized (getAWTLock()) { 171 * ... 172 * } 173 * 174 * By factoring these methods out specially, we are able to change the 175 * implementation of these methods (e.g. use more advanced locking 176 * mechanisms) without impacting calling code. 177 * 178 * Sample usage: 179 * private void doStuffWithXlib() { 180 * assert !SunToolkit.isAWTLockHeldByCurrentThread(); 181 * SunToolkit.awtLock(); 182 * try { 183 * ... 184 * XlibWrapper.XDoStuff(); 185 * } finally { 186 * SunToolkit.awtUnlock(); 187 * } 188 * } 189 */ 190 191 private static final ReentrantLock AWT_LOCK = new ReentrantLock(); 192 private static final Condition AWT_LOCK_COND = AWT_LOCK.newCondition(); 193 awtLock()194 public static final void awtLock() { 195 AWT_LOCK.lock(); 196 } 197 awtTryLock()198 public static final boolean awtTryLock() { 199 return AWT_LOCK.tryLock(); 200 } 201 awtUnlock()202 public static final void awtUnlock() { 203 AWT_LOCK.unlock(); 204 } 205 awtLockWait()206 public static final void awtLockWait() 207 throws InterruptedException 208 { 209 AWT_LOCK_COND.await(); 210 } 211 awtLockWait(long timeout)212 public static final void awtLockWait(long timeout) 213 throws InterruptedException 214 { 215 AWT_LOCK_COND.await(timeout, TimeUnit.MILLISECONDS); 216 } 217 awtLockNotify()218 public static final void awtLockNotify() { 219 AWT_LOCK_COND.signal(); 220 } 221 awtLockNotifyAll()222 public static final void awtLockNotifyAll() { 223 AWT_LOCK_COND.signalAll(); 224 } 225 isAWTLockHeldByCurrentThread()226 public static final boolean isAWTLockHeldByCurrentThread() { 227 return AWT_LOCK.isHeldByCurrentThread(); 228 } 229 230 /* 231 * Create a new AppContext, along with its EventQueue, for a 232 * new ThreadGroup. Browser code, for example, would use this 233 * method to create an AppContext & EventQueue for an Applet. 234 */ createNewAppContext()235 public static AppContext createNewAppContext() { 236 ThreadGroup threadGroup = Thread.currentThread().getThreadGroup(); 237 return createNewAppContext(threadGroup); 238 } 239 createNewAppContext(ThreadGroup threadGroup)240 static final AppContext createNewAppContext(ThreadGroup threadGroup) { 241 // Create appContext before initialization of EventQueue, so all 242 // the calls to AppContext.getAppContext() from EventQueue ctor 243 // return correct values 244 AppContext appContext = new AppContext(threadGroup); 245 initEQ(appContext); 246 247 return appContext; 248 } 249 wakeupEventQueue(EventQueue q, boolean isShutdown)250 static void wakeupEventQueue(EventQueue q, boolean isShutdown){ 251 AWTAccessor.getEventQueueAccessor().wakeup(q, isShutdown); 252 } 253 254 /* 255 * Fetch the peer associated with the given target (as specified 256 * in the peer creation method). This can be used to determine 257 * things like what the parent peer is. If the target is null 258 * or the target can't be found (either because the a peer was 259 * never created for it or the peer was disposed), a null will 260 * be returned. 261 */ targetToPeer(Object target)262 protected static Object targetToPeer(Object target) { 263 if (target != null && !GraphicsEnvironment.isHeadless()) { 264 return AWTAutoShutdown.getInstance().getPeer(target); 265 } 266 return null; 267 } 268 targetCreatedPeer(Object target, Object peer)269 protected static void targetCreatedPeer(Object target, Object peer) { 270 if (target != null && peer != null && 271 !GraphicsEnvironment.isHeadless()) 272 { 273 AWTAutoShutdown.getInstance().registerPeer(target, peer); 274 } 275 } 276 targetDisposedPeer(Object target, Object peer)277 protected static void targetDisposedPeer(Object target, Object peer) { 278 if (target != null && peer != null && 279 !GraphicsEnvironment.isHeadless()) 280 { 281 AWTAutoShutdown.getInstance().unregisterPeer(target, peer); 282 } 283 } 284 285 // Maps from non-Component/MenuComponent to AppContext. 286 // WeakHashMap<Component,AppContext> 287 private static final Map<Object, AppContext> appContextMap = 288 Collections.synchronizedMap(new WeakIdentityHashMap<Object, AppContext>()); 289 290 /** 291 * Sets the appContext field of target. If target is not a Component or 292 * MenuComponent, this returns false. 293 */ setAppContext(Object target, AppContext context)294 private static boolean setAppContext(Object target, 295 AppContext context) { 296 if (target instanceof Component) { 297 AWTAccessor.getComponentAccessor(). 298 setAppContext((Component)target, context); 299 } else if (target instanceof MenuComponent) { 300 AWTAccessor.getMenuComponentAccessor(). 301 setAppContext((MenuComponent)target, context); 302 } else { 303 return false; 304 } 305 return true; 306 } 307 308 /** 309 * Returns the appContext field for target. If target is not a 310 * Component or MenuComponent this returns null. 311 */ getAppContext(Object target)312 private static AppContext getAppContext(Object target) { 313 if (target instanceof Component) { 314 return AWTAccessor.getComponentAccessor(). 315 getAppContext((Component)target); 316 } else if (target instanceof MenuComponent) { 317 return AWTAccessor.getMenuComponentAccessor(). 318 getAppContext((MenuComponent)target); 319 } else { 320 return null; 321 } 322 } 323 324 /* 325 * Fetch the AppContext associated with the given target. 326 * This can be used to determine things like which EventQueue 327 * to use for posting events to a Component. If the target is 328 * null or the target can't be found, a null with be returned. 329 */ targetToAppContext(Object target)330 public static AppContext targetToAppContext(Object target) { 331 if (target == null) { 332 return null; 333 } 334 AppContext context = getAppContext(target); 335 if (context == null) { 336 // target is not a Component/MenuComponent, try the 337 // appContextMap. 338 context = appContextMap.get(target); 339 } 340 return context; 341 } 342 343 /** 344 * Sets the synchronous status of focus requests on lightweight 345 * components in the specified window to the specified value. 346 * If the boolean parameter is {@code true} then the focus 347 * requests on lightweight components will be performed 348 * synchronously, if it is {@code false}, then asynchronously. 349 * By default, all windows have their lightweight request status 350 * set to asynchronous. 351 * <p> 352 * The application can only set the status of lightweight focus 353 * requests to synchronous for any of its windows if it doesn't 354 * perform focus transfers between different heavyweight containers. 355 * In this case the observable focus behaviour is the same as with 356 * asynchronous status. 357 * <p> 358 * If the application performs focus transfer between different 359 * heavyweight containers and sets the lightweight focus request 360 * status to synchronous for any of its windows, then further focus 361 * behaviour is unspecified. 362 * <p> 363 * @param changed the window for which the lightweight focus request 364 * status should be set 365 * @param status the value of lightweight focus request status 366 */ 367 setLWRequestStatus(Window changed,boolean status)368 public static void setLWRequestStatus(Window changed,boolean status){ 369 AWTAccessor.getWindowAccessor().setLWRequestStatus(changed, status); 370 }; 371 checkAndSetPolicy(Container cont)372 public static void checkAndSetPolicy(Container cont) { 373 FocusTraversalPolicy defaultPolicy = KeyboardFocusManager. 374 getCurrentKeyboardFocusManager(). 375 getDefaultFocusTraversalPolicy(); 376 377 cont.setFocusTraversalPolicy(defaultPolicy); 378 } 379 380 /* 381 * Insert a mapping from target to AppContext, for later retrieval 382 * via targetToAppContext() above. 383 */ insertTargetMapping(Object target, AppContext appContext)384 public static void insertTargetMapping(Object target, AppContext appContext) { 385 if (!setAppContext(target, appContext)) { 386 // Target is not a Component/MenuComponent, use the private Map 387 // instead. 388 appContextMap.put(target, appContext); 389 } 390 } 391 392 /* 393 * Post an AWTEvent to the Java EventQueue, using the PostEventQueue 394 * to avoid possibly calling client code (EventQueueSubclass.postEvent()) 395 * on the toolkit (AWT-Windows/AWT-Motif) thread. This function should 396 * not be called under another lock since it locks the EventQueue. 397 * See bugids 4632918, 4526597. 398 */ postEvent(AppContext appContext, AWTEvent event)399 public static void postEvent(AppContext appContext, AWTEvent event) { 400 if (event == null) { 401 throw new NullPointerException(); 402 } 403 404 AWTAccessor.SequencedEventAccessor sea = AWTAccessor.getSequencedEventAccessor(); 405 if (sea != null && sea.isSequencedEvent(event)) { 406 AWTEvent nested = sea.getNested(event); 407 if (nested.getID() == WindowEvent.WINDOW_LOST_FOCUS && 408 nested instanceof TimedWindowEvent) 409 { 410 TimedWindowEvent twe = (TimedWindowEvent)nested; 411 ((SunToolkit)Toolkit.getDefaultToolkit()). 412 setWindowDeactivationTime((Window)twe.getSource(), twe.getWhen()); 413 } 414 } 415 416 // All events posted via this method are system-generated. 417 // Placing the following call here reduces considerably the 418 // number of places throughout the toolkit that would 419 // otherwise have to be modified to precisely identify 420 // system-generated events. 421 setSystemGenerated(event); 422 AppContext eventContext = targetToAppContext(event.getSource()); 423 if (eventContext != null && !eventContext.equals(appContext)) { 424 throw new RuntimeException("Event posted on wrong app context : " + event); 425 } 426 PostEventQueue postEventQueue = 427 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 428 if (postEventQueue != null) { 429 postEventQueue.postEvent(event); 430 } 431 } 432 433 /* 434 * Post AWTEvent of high priority. 435 */ postPriorityEvent(final AWTEvent e)436 public static void postPriorityEvent(final AWTEvent e) { 437 PeerEvent pe = new PeerEvent(Toolkit.getDefaultToolkit(), new Runnable() { 438 @Override 439 public void run() { 440 AWTAccessor.getAWTEventAccessor().setPosted(e); 441 ((Component)e.getSource()).dispatchEvent(e); 442 } 443 }, PeerEvent.ULTIMATE_PRIORITY_EVENT); 444 postEvent(targetToAppContext(e.getSource()), pe); 445 } 446 447 /* 448 * Flush any pending events which haven't been posted to the AWT 449 * EventQueue yet. 450 */ flushPendingEvents()451 public static void flushPendingEvents() { 452 AppContext appContext = AppContext.getAppContext(); 453 flushPendingEvents(appContext); 454 } 455 456 /* 457 * Flush the PostEventQueue for the right AppContext. 458 * The default flushPendingEvents only flushes the thread-local context, 459 * which is not always correct, c.f. 3746956 460 */ flushPendingEvents(AppContext appContext)461 public static void flushPendingEvents(AppContext appContext) { 462 PostEventQueue postEventQueue = 463 (PostEventQueue)appContext.get(POST_EVENT_QUEUE_KEY); 464 if (postEventQueue != null) { 465 postEventQueue.flush(); 466 } 467 } 468 469 /* 470 * Execute a chunk of code on the Java event handler thread for the 471 * given target. Does not wait for the execution to occur before 472 * returning to the caller. 473 */ executeOnEventHandlerThread(Object target, Runnable runnable)474 public static void executeOnEventHandlerThread(Object target, 475 Runnable runnable) { 476 executeOnEventHandlerThread(new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT)); 477 } 478 479 /* 480 * Fixed 5064013: the InvocationEvent time should be equals 481 * the time of the ActionEvent 482 */ 483 @SuppressWarnings("serial") executeOnEventHandlerThread(Object target, Runnable runnable, final long when)484 public static void executeOnEventHandlerThread(Object target, 485 Runnable runnable, 486 final long when) { 487 executeOnEventHandlerThread( 488 new PeerEvent(target, runnable, PeerEvent.PRIORITY_EVENT) { 489 @Override 490 public long getWhen() { 491 return when; 492 } 493 }); 494 } 495 496 /* 497 * Execute a chunk of code on the Java event handler thread for the 498 * given target. Does not wait for the execution to occur before 499 * returning to the caller. 500 */ executeOnEventHandlerThread(PeerEvent peerEvent)501 public static void executeOnEventHandlerThread(PeerEvent peerEvent) { 502 postEvent(targetToAppContext(peerEvent.getSource()), peerEvent); 503 } 504 505 /* 506 * Execute a chunk of code on the Java event handler thread. The 507 * method takes into account provided AppContext and sets 508 * {@code SunToolkit.getDefaultToolkit()} as a target of the 509 * event. See 6451487 for detailes. 510 * Does not wait for the execution to occur before returning to 511 * the caller. 512 */ invokeLaterOnAppContext( AppContext appContext, Runnable dispatcher)513 public static void invokeLaterOnAppContext( 514 AppContext appContext, Runnable dispatcher) 515 { 516 postEvent(appContext, 517 new PeerEvent(Toolkit.getDefaultToolkit(), dispatcher, 518 PeerEvent.PRIORITY_EVENT)); 519 } 520 521 /* 522 * Execute a chunk of code on the Java event handler thread for the 523 * given target. Waits for the execution to occur before returning 524 * to the caller. 525 */ executeOnEDTAndWait(Object target, Runnable runnable)526 public static void executeOnEDTAndWait(Object target, Runnable runnable) 527 throws InterruptedException, InvocationTargetException 528 { 529 if (EventQueue.isDispatchThread()) { 530 throw new Error("Cannot call executeOnEDTAndWait from any event dispatcher thread"); 531 } 532 533 class AWTInvocationLock {} 534 Object lock = new AWTInvocationLock(); 535 536 PeerEvent event = new PeerEvent(target, runnable, lock, true, PeerEvent.PRIORITY_EVENT); 537 538 synchronized (lock) { 539 executeOnEventHandlerThread(event); 540 while(!event.isDispatched()) { 541 lock.wait(); 542 } 543 } 544 545 Throwable eventThrowable = event.getThrowable(); 546 if (eventThrowable != null) { 547 throw new InvocationTargetException(eventThrowable); 548 } 549 } 550 551 /* 552 * Returns true if the calling thread is the event dispatch thread 553 * contained within AppContext which associated with the given target. 554 * Use this call to ensure that a given task is being executed 555 * (or not being) on the event dispatch thread for the given target. 556 */ isDispatchThreadForAppContext(Object target)557 public static boolean isDispatchThreadForAppContext(Object target) { 558 AppContext appContext = targetToAppContext(target); 559 EventQueue eq = (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 560 561 AWTAccessor.EventQueueAccessor accessor = AWTAccessor.getEventQueueAccessor(); 562 return accessor.isDispatchThreadImpl(eq); 563 } 564 565 @Override getScreenSize()566 public Dimension getScreenSize() { 567 return GraphicsEnvironment.getLocalGraphicsEnvironment() 568 .getDefaultScreenDevice().getDefaultConfiguration() 569 .getBounds().getSize(); 570 } 571 572 @Override getColorModel()573 public ColorModel getColorModel() throws HeadlessException { 574 return GraphicsEnvironment.getLocalGraphicsEnvironment() 575 .getDefaultScreenDevice().getDefaultConfiguration() 576 .getColorModel(); 577 } 578 579 @Override 580 @SuppressWarnings("deprecation") getFontMetrics(Font font)581 public FontMetrics getFontMetrics(Font font) { 582 return FontDesignMetrics.getMetrics(font); 583 } 584 585 @Override 586 @SuppressWarnings("deprecation") getFontList()587 public String[] getFontList() { 588 String[] hardwiredFontList = { 589 Font.DIALOG, Font.SANS_SERIF, Font.SERIF, Font.MONOSPACED, 590 Font.DIALOG_INPUT 591 592 // -- Obsolete font names from 1.0.2. It was decided that 593 // -- getFontList should not return these old names: 594 // "Helvetica", "TimesRoman", "Courier", "ZapfDingbats" 595 }; 596 return hardwiredFontList; 597 } 598 599 /** 600 * Disables erasing of background on the canvas before painting if 601 * this is supported by the current toolkit. It is recommended to 602 * call this method early, before the Canvas becomes displayable, 603 * because some Toolkit implementations do not support changing 604 * this property once the Canvas becomes displayable. 605 */ disableBackgroundErase(Canvas canvas)606 public void disableBackgroundErase(Canvas canvas) { 607 disableBackgroundEraseImpl(canvas); 608 } 609 610 /** 611 * Disables the native erasing of the background on the given 612 * component before painting if this is supported by the current 613 * toolkit. This only has an effect for certain components such as 614 * Canvas, Panel and Window. It is recommended to call this method 615 * early, before the Component becomes displayable, because some 616 * Toolkit implementations do not support changing this property 617 * once the Component becomes displayable. 618 */ disableBackgroundErase(Component component)619 public void disableBackgroundErase(Component component) { 620 disableBackgroundEraseImpl(component); 621 } 622 disableBackgroundEraseImpl(Component component)623 private void disableBackgroundEraseImpl(Component component) { 624 AWTAccessor.getComponentAccessor().setBackgroundEraseDisabled(component, true); 625 } 626 627 /** 628 * Returns the value of "sun.awt.noerasebackground" property. Default 629 * value is {@code false}. 630 */ getSunAwtNoerasebackground()631 public static boolean getSunAwtNoerasebackground() { 632 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.noerasebackground")); 633 } 634 635 /** 636 * Returns the value of "sun.awt.erasebackgroundonresize" property. Default 637 * value is {@code false}. 638 */ getSunAwtErasebackgroundonresize()639 public static boolean getSunAwtErasebackgroundonresize() { 640 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.erasebackgroundonresize")); 641 } 642 643 644 @SuppressWarnings("deprecation") 645 static final SoftCache fileImgCache = new SoftCache(); 646 647 @SuppressWarnings("deprecation") 648 static final SoftCache urlImgCache = new SoftCache(); 649 getImageFromHash(Toolkit tk, URL url)650 static Image getImageFromHash(Toolkit tk, URL url) { 651 checkPermissions(url); 652 synchronized (urlImgCache) { 653 String key = url.toString(); 654 Image img = (Image)urlImgCache.get(key); 655 if (img == null) { 656 try { 657 img = tk.createImage(new URLImageSource(url)); 658 urlImgCache.put(key, img); 659 } catch (Exception e) { 660 } 661 } 662 return img; 663 } 664 } 665 getImageFromHash(Toolkit tk, String filename)666 static Image getImageFromHash(Toolkit tk, 667 String filename) { 668 checkPermissions(filename); 669 synchronized (fileImgCache) { 670 Image img = (Image)fileImgCache.get(filename); 671 if (img == null) { 672 try { 673 img = tk.createImage(new FileImageSource(filename)); 674 fileImgCache.put(filename, img); 675 } catch (Exception e) { 676 } 677 } 678 return img; 679 } 680 } 681 682 @Override getImage(String filename)683 public Image getImage(String filename) { 684 return getImageFromHash(this, filename); 685 } 686 687 @Override getImage(URL url)688 public Image getImage(URL url) { 689 return getImageFromHash(this, url); 690 } 691 getImageWithResolutionVariant(String fileName, String resolutionVariantName)692 protected Image getImageWithResolutionVariant(String fileName, 693 String resolutionVariantName) { 694 synchronized (fileImgCache) { 695 Image image = getImageFromHash(this, fileName); 696 if (image instanceof MultiResolutionImage) { 697 return image; 698 } 699 Image resolutionVariant = getImageFromHash(this, resolutionVariantName); 700 image = createImageWithResolutionVariant(image, resolutionVariant); 701 fileImgCache.put(fileName, image); 702 return image; 703 } 704 } 705 getImageWithResolutionVariant(URL url, URL resolutionVariantURL)706 protected Image getImageWithResolutionVariant(URL url, 707 URL resolutionVariantURL) { 708 synchronized (urlImgCache) { 709 Image image = getImageFromHash(this, url); 710 if (image instanceof MultiResolutionImage) { 711 return image; 712 } 713 Image resolutionVariant = getImageFromHash(this, resolutionVariantURL); 714 image = createImageWithResolutionVariant(image, resolutionVariant); 715 String key = url.toString(); 716 urlImgCache.put(key, image); 717 return image; 718 } 719 } 720 721 722 @Override createImage(String filename)723 public Image createImage(String filename) { 724 checkPermissions(filename); 725 return createImage(new FileImageSource(filename)); 726 } 727 728 @Override createImage(URL url)729 public Image createImage(URL url) { 730 checkPermissions(url); 731 return createImage(new URLImageSource(url)); 732 } 733 734 @Override createImage(byte[] data, int offset, int length)735 public Image createImage(byte[] data, int offset, int length) { 736 return createImage(new ByteArrayImageSource(data, offset, length)); 737 } 738 739 @Override createImage(ImageProducer producer)740 public Image createImage(ImageProducer producer) { 741 return new ToolkitImage(producer); 742 } 743 createImageWithResolutionVariant(Image image, Image resolutionVariant)744 public static Image createImageWithResolutionVariant(Image image, 745 Image resolutionVariant) { 746 return new MultiResolutionToolkitImage(image, resolutionVariant); 747 } 748 749 @Override checkImage(Image img, int w, int h, ImageObserver o)750 public int checkImage(Image img, int w, int h, ImageObserver o) { 751 if (!(img instanceof ToolkitImage)) { 752 return ImageObserver.ALLBITS; 753 } 754 755 ToolkitImage tkimg = (ToolkitImage)img; 756 int repbits; 757 if (w == 0 || h == 0) { 758 repbits = ImageObserver.ALLBITS; 759 } else { 760 repbits = tkimg.getImageRep().check(o); 761 } 762 return (tkimg.check(o) | repbits) & checkResolutionVariant(img, w, h, o); 763 } 764 765 @Override prepareImage(Image img, int w, int h, ImageObserver o)766 public boolean prepareImage(Image img, int w, int h, ImageObserver o) { 767 if (w == 0 || h == 0) { 768 return true; 769 } 770 771 // Must be a ToolkitImage 772 if (!(img instanceof ToolkitImage)) { 773 return true; 774 } 775 776 ToolkitImage tkimg = (ToolkitImage)img; 777 if (tkimg.hasError()) { 778 if (o != null) { 779 o.imageUpdate(img, ImageObserver.ERROR|ImageObserver.ABORT, 780 -1, -1, -1, -1); 781 } 782 return false; 783 } 784 ImageRepresentation ir = tkimg.getImageRep(); 785 return ir.prepare(o) & prepareResolutionVariant(img, w, h, o); 786 } 787 checkResolutionVariant(Image img, int w, int h, ImageObserver o)788 private int checkResolutionVariant(Image img, int w, int h, ImageObserver o) { 789 ToolkitImage rvImage = getResolutionVariant(img); 790 int rvw = getRVSize(w); 791 int rvh = getRVSize(h); 792 // Ignore the resolution variant in case of error 793 return (rvImage == null || rvImage.hasError()) ? 0xFFFF : 794 checkImage(rvImage, rvw, rvh, MultiResolutionToolkitImage. 795 getResolutionVariantObserver( 796 img, o, w, h, rvw, rvh, true)); 797 } 798 prepareResolutionVariant(Image img, int w, int h, ImageObserver o)799 private boolean prepareResolutionVariant(Image img, int w, int h, 800 ImageObserver o) { 801 802 ToolkitImage rvImage = getResolutionVariant(img); 803 int rvw = getRVSize(w); 804 int rvh = getRVSize(h); 805 // Ignore the resolution variant in case of error 806 return rvImage == null || rvImage.hasError() || prepareImage( 807 rvImage, rvw, rvh, 808 MultiResolutionToolkitImage.getResolutionVariantObserver( 809 img, o, w, h, rvw, rvh, true)); 810 } 811 getRVSize(int size)812 private static int getRVSize(int size){ 813 return size == -1 ? -1 : 2 * size; 814 } 815 getResolutionVariant(Image image)816 private static ToolkitImage getResolutionVariant(Image image) { 817 if (image instanceof MultiResolutionToolkitImage) { 818 Image resolutionVariant = ((MultiResolutionToolkitImage) image). 819 getResolutionVariant(); 820 if (resolutionVariant instanceof ToolkitImage) { 821 return (ToolkitImage) resolutionVariant; 822 } 823 } 824 return null; 825 } 826 imageCached(String fileName)827 protected static boolean imageCached(String fileName) { 828 return fileImgCache.containsKey(fileName); 829 } 830 imageCached(URL url)831 protected static boolean imageCached(URL url) { 832 String key = url.toString(); 833 return urlImgCache.containsKey(key); 834 } 835 imageExists(String filename)836 protected static boolean imageExists(String filename) { 837 if (filename != null) { 838 checkPermissions(filename); 839 return new File(filename).exists(); 840 } 841 return false; 842 } 843 844 @SuppressWarnings("try") imageExists(URL url)845 protected static boolean imageExists(URL url) { 846 if (url != null) { 847 checkPermissions(url); 848 try (InputStream is = url.openStream()) { 849 return true; 850 }catch(IOException e){ 851 return false; 852 } 853 } 854 return false; 855 } 856 checkPermissions(String filename)857 private static void checkPermissions(String filename) { 858 SecurityManager security = System.getSecurityManager(); 859 if (security != null) { 860 security.checkRead(filename); 861 } 862 } 863 checkPermissions(URL url)864 private static void checkPermissions(URL url) { 865 SecurityManager sm = System.getSecurityManager(); 866 if (sm != null) { 867 try { 868 java.security.Permission perm = 869 URLUtil.getConnectPermission(url); 870 if (perm != null) { 871 sm.checkPermission(perm); 872 } 873 } catch (java.io.IOException ioe) { 874 sm.checkConnect(url.getHost(), url.getPort()); 875 } 876 } 877 } 878 879 /** 880 * Scans {@code imageList} for best-looking image of specified dimensions. 881 * Image can be scaled and/or padded with transparency. 882 */ getScaledIconImage(java.util.List<Image> imageList, int width, int height)883 public static BufferedImage getScaledIconImage(java.util.List<Image> imageList, int width, int height) { 884 if (width == 0 || height == 0) { 885 return null; 886 } 887 java.util.List<Image> multiResAndnormalImages = new ArrayList<>(imageList.size()); 888 for (Image image : imageList) { 889 if ((image instanceof MultiResolutionImage)) { 890 Image im = ((MultiResolutionImage) image).getResolutionVariant(width, height); 891 multiResAndnormalImages.add(im); 892 } else { 893 multiResAndnormalImages.add(image); 894 } 895 } 896 Image bestImage = null; 897 int bestWidth = 0; 898 int bestHeight = 0; 899 double bestSimilarity = 3; //Impossibly high value 900 double bestScaleFactor = 0; 901 for (Iterator<Image> i = multiResAndnormalImages.iterator();i.hasNext();) { 902 //Iterate imageList looking for best matching image. 903 //'Similarity' measure is defined as good scale factor and small insets. 904 //best possible similarity is 0 (no scale, no insets). 905 //It's found while the experiments that good-looking result is achieved 906 //with scale factors x1, x3/4, x2/3, xN, x1/N. 907 Image im = i.next(); 908 if (im == null) { 909 continue; 910 } 911 if (im instanceof ToolkitImage) { 912 ImageRepresentation ir = ((ToolkitImage)im).getImageRep(); 913 ir.reconstruct(ImageObserver.ALLBITS); 914 } 915 int iw; 916 int ih; 917 try { 918 iw = im.getWidth(null); 919 ih = im.getHeight(null); 920 } catch (Exception e){ 921 continue; 922 } 923 if (iw > 0 && ih > 0) { 924 //Calc scale factor 925 double scaleFactor = Math.min((double)width / (double)iw, 926 (double)height / (double)ih); 927 //Calculate scaled image dimensions 928 //adjusting scale factor to nearest "good" value 929 int adjw = 0; 930 int adjh = 0; 931 double scaleMeasure = 1; //0 - best (no) scale, 1 - impossibly bad 932 if (scaleFactor >= 2) { 933 //Need to enlarge image more than twice 934 //Round down scale factor to multiply by integer value 935 scaleFactor = Math.floor(scaleFactor); 936 adjw = iw * (int)scaleFactor; 937 adjh = ih * (int)scaleFactor; 938 scaleMeasure = 1.0 - 0.5 / scaleFactor; 939 } else if (scaleFactor >= 1) { 940 //Don't scale 941 scaleFactor = 1.0; 942 adjw = iw; 943 adjh = ih; 944 scaleMeasure = 0; 945 } else if (scaleFactor >= 0.75) { 946 //Multiply by 3/4 947 scaleFactor = 0.75; 948 adjw = iw * 3 / 4; 949 adjh = ih * 3 / 4; 950 scaleMeasure = 0.3; 951 } else if (scaleFactor >= 0.6666) { 952 //Multiply by 2/3 953 scaleFactor = 0.6666; 954 adjw = iw * 2 / 3; 955 adjh = ih * 2 / 3; 956 scaleMeasure = 0.33; 957 } else { 958 //Multiply size by 1/scaleDivider 959 //where scaleDivider is minimum possible integer 960 //larger than 1/scaleFactor 961 double scaleDivider = Math.ceil(1.0 / scaleFactor); 962 scaleFactor = 1.0 / scaleDivider; 963 adjw = (int)Math.round((double)iw / scaleDivider); 964 adjh = (int)Math.round((double)ih / scaleDivider); 965 scaleMeasure = 1.0 - 1.0 / scaleDivider; 966 } 967 double similarity = ((double)width - (double)adjw) / (double)width + 968 ((double)height - (double)adjh) / (double)height + //Large padding is bad 969 scaleMeasure; //Large rescale is bad 970 if (similarity < bestSimilarity) { 971 bestSimilarity = similarity; 972 bestScaleFactor = scaleFactor; 973 bestImage = im; 974 bestWidth = adjw; 975 bestHeight = adjh; 976 } 977 if (similarity == 0) break; 978 } 979 } 980 if (bestImage == null) { 981 //No images were found, possibly all are broken 982 return null; 983 } 984 BufferedImage bimage = 985 new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); 986 Graphics2D g = bimage.createGraphics(); 987 g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, 988 RenderingHints.VALUE_INTERPOLATION_BILINEAR); 989 try { 990 int x = (width - bestWidth) / 2; 991 int y = (height - bestHeight) / 2; 992 g.drawImage(bestImage, x, y, bestWidth, bestHeight, null); 993 } finally { 994 g.dispose(); 995 } 996 return bimage; 997 } 998 getScaledIconData(java.util.List<Image> imageList, int width, int height)999 public static DataBufferInt getScaledIconData(java.util.List<Image> imageList, int width, int height) { 1000 BufferedImage bimage = getScaledIconImage(imageList, width, height); 1001 if (bimage == null) { 1002 return null; 1003 } 1004 Raster raster = bimage.getRaster(); 1005 DataBuffer buffer = raster.getDataBuffer(); 1006 return (DataBufferInt)buffer; 1007 } 1008 1009 @Override getSystemEventQueueImpl()1010 protected EventQueue getSystemEventQueueImpl() { 1011 return getSystemEventQueueImplPP(); 1012 } 1013 1014 // Package private implementation getSystemEventQueueImplPP()1015 static EventQueue getSystemEventQueueImplPP() { 1016 return getSystemEventQueueImplPP(AppContext.getAppContext()); 1017 } 1018 getSystemEventQueueImplPP(AppContext appContext)1019 public static EventQueue getSystemEventQueueImplPP(AppContext appContext) { 1020 EventQueue theEventQueue = 1021 (EventQueue)appContext.get(AppContext.EVENT_QUEUE_KEY); 1022 return theEventQueue; 1023 } 1024 1025 /** 1026 * Give native peers the ability to query the native container 1027 * given a native component (eg the direct parent may be lightweight). 1028 */ getNativeContainer(Component c)1029 public static Container getNativeContainer(Component c) { 1030 return Toolkit.getNativeContainer(c); 1031 } 1032 1033 /** 1034 * Gives native peers the ability to query the closest HW component. 1035 * If the given component is heavyweight, then it returns this. Otherwise, 1036 * it goes one level up in the hierarchy and tests next component. 1037 */ getHeavyweightComponent(Component c)1038 public static Component getHeavyweightComponent(Component c) { 1039 while (c != null && AWTAccessor.getComponentAccessor().isLightweight(c)) { 1040 c = AWTAccessor.getComponentAccessor().getParent(c); 1041 } 1042 return c; 1043 } 1044 1045 /** 1046 * Returns key modifiers used by Swing to set up a focus accelerator key stroke. 1047 */ 1048 @SuppressWarnings("deprecation") getFocusAcceleratorKeyMask()1049 public int getFocusAcceleratorKeyMask() { 1050 return InputEvent.ALT_MASK; 1051 } 1052 1053 /** 1054 * Tests whether specified key modifiers mask can be used to enter a printable 1055 * character. This is a default implementation of this method, which reflects 1056 * the way things work on Windows: here, pressing ctrl + alt allows user to enter 1057 * characters from the extended character set (like euro sign or math symbols) 1058 */ 1059 @SuppressWarnings("deprecation") isPrintableCharacterModifiersMask(int mods)1060 public boolean isPrintableCharacterModifiersMask(int mods) { 1061 return ((mods & InputEvent.ALT_MASK) == (mods & InputEvent.CTRL_MASK)); 1062 } 1063 1064 /** 1065 * Returns whether popup is allowed to be shown above the task bar. 1066 * This is a default implementation of this method, which checks 1067 * corresponding security permission. 1068 */ canPopupOverlapTaskBar()1069 public boolean canPopupOverlapTaskBar() { 1070 boolean result = true; 1071 try { 1072 SecurityManager sm = System.getSecurityManager(); 1073 if (sm != null) { 1074 sm.checkPermission(AWTPermissions.SET_WINDOW_ALWAYS_ON_TOP_PERMISSION); 1075 } 1076 } catch (SecurityException se) { 1077 // There is no permission to show popups over the task bar 1078 result = false; 1079 } 1080 return result; 1081 } 1082 1083 /** 1084 * Returns a new input method window, with behavior as specified in 1085 * {@link java.awt.im.spi.InputMethodContext#createInputMethodWindow}. 1086 * If the inputContext is not null, the window should return it from its 1087 * getInputContext() method. The window needs to implement 1088 * sun.awt.im.InputMethodWindow. 1089 * <p> 1090 * SunToolkit subclasses can override this method to return better input 1091 * method windows. 1092 */ 1093 @Override createInputMethodWindow(String title, InputContext context)1094 public Window createInputMethodWindow(String title, InputContext context) { 1095 return new sun.awt.im.SimpleInputMethodWindow(title, context); 1096 } 1097 1098 /** 1099 * Returns whether enableInputMethods should be set to true for peered 1100 * TextComponent instances on this platform. False by default. 1101 */ 1102 @Override enableInputMethodsForTextComponent()1103 public boolean enableInputMethodsForTextComponent() { 1104 return false; 1105 } 1106 1107 private static Locale startupLocale = null; 1108 1109 /** 1110 * Returns the locale in which the runtime was started. 1111 */ getStartupLocale()1112 public static Locale getStartupLocale() { 1113 if (startupLocale == null) { 1114 String language, region, country, variant; 1115 language = AccessController.doPrivileged( 1116 new GetPropertyAction("user.language", "en")); 1117 // for compatibility, check for old user.region property 1118 region = AccessController.doPrivileged( 1119 new GetPropertyAction("user.region")); 1120 if (region != null) { 1121 // region can be of form country, country_variant, or _variant 1122 int i = region.indexOf('_'); 1123 if (i >= 0) { 1124 country = region.substring(0, i); 1125 variant = region.substring(i + 1); 1126 } else { 1127 country = region; 1128 variant = ""; 1129 } 1130 } else { 1131 country = AccessController.doPrivileged( 1132 new GetPropertyAction("user.country", "")); 1133 variant = AccessController.doPrivileged( 1134 new GetPropertyAction("user.variant", "")); 1135 } 1136 startupLocale = new Locale(language, country, variant); 1137 } 1138 return startupLocale; 1139 } 1140 1141 /** 1142 * Returns the default keyboard locale of the underlying operating system 1143 */ 1144 @Override getDefaultKeyboardLocale()1145 public Locale getDefaultKeyboardLocale() { 1146 return getStartupLocale(); 1147 } 1148 1149 /** 1150 * Returns whether default toolkit needs the support of the xembed 1151 * from embedding host(if any). 1152 * @return {@code true}, if XEmbed is needed, {@code false} otherwise 1153 */ needsXEmbed()1154 public static boolean needsXEmbed() { 1155 String noxembed = AccessController. 1156 doPrivileged(new GetPropertyAction("sun.awt.noxembed", "false")); 1157 if ("true".equals(noxembed)) { 1158 return false; 1159 } 1160 1161 Toolkit tk = Toolkit.getDefaultToolkit(); 1162 if (tk instanceof SunToolkit) { 1163 // SunToolkit descendants should override this method to specify 1164 // concrete behavior 1165 return ((SunToolkit)tk).needsXEmbedImpl(); 1166 } else { 1167 // Non-SunToolkit doubtly might support XEmbed 1168 return false; 1169 } 1170 } 1171 1172 /** 1173 * Returns whether this toolkit needs the support of the xembed 1174 * from embedding host(if any). 1175 * @return {@code true}, if XEmbed is needed, {@code false} otherwise 1176 */ needsXEmbedImpl()1177 protected boolean needsXEmbedImpl() { 1178 return false; 1179 } 1180 1181 private static Dialog.ModalExclusionType DEFAULT_MODAL_EXCLUSION_TYPE = null; 1182 1183 /** 1184 * Returns whether the XEmbed server feature is requested by 1185 * developer. If true, Toolkit should return an 1186 * XEmbed-server-enabled CanvasPeer instead of the ordinary CanvasPeer. 1187 */ isXEmbedServerRequested()1188 protected final boolean isXEmbedServerRequested() { 1189 return AccessController.doPrivileged(new GetBooleanAction("sun.awt.xembedserver")); 1190 } 1191 1192 /** 1193 * Returns whether the modal exclusion API is supported by the current toolkit. 1194 * When it isn't supported, calling {@code setModalExcluded} has no 1195 * effect, and {@code isModalExcluded} returns false for all windows. 1196 * 1197 * @return true if modal exclusion is supported by the toolkit, false otherwise 1198 * 1199 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1200 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1201 * 1202 * @since 1.5 1203 */ isModalExcludedSupported()1204 public static boolean isModalExcludedSupported() 1205 { 1206 Toolkit tk = Toolkit.getDefaultToolkit(); 1207 return tk.isModalExclusionTypeSupported(DEFAULT_MODAL_EXCLUSION_TYPE); 1208 } 1209 /* 1210 * Default implementation for isModalExcludedSupportedImpl(), returns false. 1211 * 1212 * @see sun.awt.windows.WToolkit#isModalExcludeSupportedImpl 1213 * @see sun.awt.X11.XToolkit#isModalExcludeSupportedImpl 1214 * 1215 * @since 1.5 1216 */ isModalExcludedSupportedImpl()1217 protected boolean isModalExcludedSupportedImpl() 1218 { 1219 return false; 1220 } 1221 1222 /* 1223 * Sets this window to be excluded from being modally blocked. When the 1224 * toolkit supports modal exclusion and this method is called, input 1225 * events, focus transfer and z-order will continue to work for the 1226 * window, it's owned windows and child components, even in the 1227 * presence of a modal dialog. 1228 * For details on which {@code Window}s are normally blocked 1229 * by modal dialog, see {@link java.awt.Dialog}. 1230 * Invoking this method when the modal exclusion API is not supported by 1231 * the current toolkit has no effect. 1232 * @param window Window to be marked as not modally blocked 1233 * @see java.awt.Dialog 1234 * @see java.awt.Dialog#setModal(boolean) 1235 * @see sun.awt.SunToolkit#isModalExcludedSupported 1236 * @see sun.awt.SunToolkit#isModalExcluded(java.awt.Window) 1237 */ setModalExcluded(Window window)1238 public static void setModalExcluded(Window window) 1239 { 1240 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1241 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1242 } 1243 window.setModalExclusionType(DEFAULT_MODAL_EXCLUSION_TYPE); 1244 } 1245 1246 /* 1247 * Returns whether the specified window is blocked by modal dialogs. 1248 * If the modal exclusion API isn't supported by the current toolkit, 1249 * it returns false for all windows. 1250 * 1251 * @param window Window to test for modal exclusion 1252 * 1253 * @return true if the window is modal excluded, false otherwise. If 1254 * the modal exclusion isn't supported by the current Toolkit, false 1255 * is returned 1256 * 1257 * @see sun.awt.SunToolkit#isModalExcludedSupported 1258 * @see sun.awt.SunToolkit#setModalExcluded(java.awt.Window) 1259 * 1260 * @since 1.5 1261 */ isModalExcluded(Window window)1262 public static boolean isModalExcluded(Window window) 1263 { 1264 if (DEFAULT_MODAL_EXCLUSION_TYPE == null) { 1265 DEFAULT_MODAL_EXCLUSION_TYPE = Dialog.ModalExclusionType.APPLICATION_EXCLUDE; 1266 } 1267 return window.getModalExclusionType().compareTo(DEFAULT_MODAL_EXCLUSION_TYPE) >= 0; 1268 } 1269 1270 /** 1271 * Overridden in XToolkit and WToolkit 1272 */ 1273 @Override isModalityTypeSupported(Dialog.ModalityType modalityType)1274 public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) { 1275 return (modalityType == Dialog.ModalityType.MODELESS) || 1276 (modalityType == Dialog.ModalityType.APPLICATION_MODAL); 1277 } 1278 1279 /** 1280 * Overridden in XToolkit and WToolkit 1281 */ 1282 @Override isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType)1283 public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) { 1284 return (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE); 1285 } 1286 1287 /////////////////////////////////////////////////////////////////////////// 1288 // 1289 // The following is used by the Java Plug-in to coordinate dialog modality 1290 // between containing applications (browsers, ActiveX containers etc) and 1291 // the AWT. 1292 // 1293 /////////////////////////////////////////////////////////////////////////// 1294 1295 private ModalityListenerList modalityListeners = new ModalityListenerList(); 1296 addModalityListener(ModalityListener listener)1297 public void addModalityListener(ModalityListener listener) { 1298 modalityListeners.add(listener); 1299 } 1300 removeModalityListener(ModalityListener listener)1301 public void removeModalityListener(ModalityListener listener) { 1302 modalityListeners.remove(listener); 1303 } 1304 notifyModalityPushed(Dialog dialog)1305 public void notifyModalityPushed(Dialog dialog) { 1306 notifyModalityChange(ModalityEvent.MODALITY_PUSHED, dialog); 1307 } 1308 notifyModalityPopped(Dialog dialog)1309 public void notifyModalityPopped(Dialog dialog) { 1310 notifyModalityChange(ModalityEvent.MODALITY_POPPED, dialog); 1311 } 1312 notifyModalityChange(int id, Dialog source)1313 final void notifyModalityChange(int id, Dialog source) { 1314 ModalityEvent ev = new ModalityEvent(source, modalityListeners, id); 1315 ev.dispatch(); 1316 } 1317 1318 static class ModalityListenerList implements ModalityListener { 1319 1320 Vector<ModalityListener> listeners = new Vector<ModalityListener>(); 1321 add(ModalityListener listener)1322 void add(ModalityListener listener) { 1323 listeners.addElement(listener); 1324 } 1325 remove(ModalityListener listener)1326 void remove(ModalityListener listener) { 1327 listeners.removeElement(listener); 1328 } 1329 1330 @Override modalityPushed(ModalityEvent ev)1331 public void modalityPushed(ModalityEvent ev) { 1332 Iterator<ModalityListener> it = listeners.iterator(); 1333 while (it.hasNext()) { 1334 it.next().modalityPushed(ev); 1335 } 1336 } 1337 1338 @Override modalityPopped(ModalityEvent ev)1339 public void modalityPopped(ModalityEvent ev) { 1340 Iterator<ModalityListener> it = listeners.iterator(); 1341 while (it.hasNext()) { 1342 it.next().modalityPopped(ev); 1343 } 1344 } 1345 } // end of class ModalityListenerList 1346 1347 /////////////////////////////////////////////////////////////////////////// 1348 // End Plug-in code 1349 /////////////////////////////////////////////////////////////////////////// 1350 isLightweightOrUnknown(Component comp)1351 public static boolean isLightweightOrUnknown(Component comp) { 1352 if (comp.isLightweight() 1353 || !(getDefaultToolkit() instanceof SunToolkit)) 1354 { 1355 return true; 1356 } 1357 return !(comp instanceof Button 1358 || comp instanceof Canvas 1359 || comp instanceof Checkbox 1360 || comp instanceof Choice 1361 || comp instanceof Label 1362 || comp instanceof java.awt.List 1363 || comp instanceof Panel 1364 || comp instanceof Scrollbar 1365 || comp instanceof ScrollPane 1366 || comp instanceof TextArea 1367 || comp instanceof TextField 1368 || comp instanceof Window); 1369 } 1370 1371 @SuppressWarnings("serial") 1372 public static class OperationTimedOut extends RuntimeException { OperationTimedOut(String msg)1373 public OperationTimedOut(String msg) { 1374 super(msg); 1375 } OperationTimedOut()1376 public OperationTimedOut() { 1377 } 1378 } 1379 1380 @SuppressWarnings("serial") 1381 public static class InfiniteLoop extends RuntimeException { 1382 } 1383 1384 @SuppressWarnings("serial") 1385 public static class IllegalThreadException extends RuntimeException { IllegalThreadException(String msg)1386 public IllegalThreadException(String msg) { 1387 super(msg); 1388 } IllegalThreadException()1389 public IllegalThreadException() { 1390 } 1391 } 1392 1393 public static final int DEFAULT_WAIT_TIME = 10000; 1394 private static final int MAX_ITERS = 20; 1395 private static final int MIN_ITERS = 0; 1396 private static final int MINIMAL_EDELAY = 0; 1397 1398 /** 1399 * Parameterless version of realsync which uses default timout (see DEFAUL_WAIT_TIME). 1400 */ realSync()1401 public void realSync() throws OperationTimedOut, InfiniteLoop { 1402 realSync(DEFAULT_WAIT_TIME); 1403 } 1404 1405 /** 1406 * Forces toolkit to synchronize with the native windowing 1407 * sub-system, flushing all pending work and waiting for all the 1408 * events to be processed. This method guarantees that after 1409 * return no additional Java events will be generated, unless 1410 * cause by user. Obviously, the method cannot be used on the 1411 * event dispatch thread (EDT). In case it nevertheless gets 1412 * invoked on this thread, the method throws the 1413 * IllegalThreadException runtime exception. 1414 * 1415 * <p> This method allows to write tests without explicit timeouts 1416 * or wait for some event. Example: 1417 * <pre>{@code 1418 * Frame f = ...; 1419 * f.setVisible(true); 1420 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1421 * }</pre> 1422 * 1423 * <p> After realSync, {@code f} will be completely visible 1424 * on the screen, its getLocationOnScreen will be returning the 1425 * right result and it will be the focus owner. 1426 * 1427 * <p> Another example: 1428 * <pre>{@code 1429 * b.requestFocus(); 1430 * ((SunToolkit)Toolkit.getDefaultToolkit()).realSync(); 1431 * }</pre> 1432 * 1433 * <p> After realSync, {@code b} will be focus owner. 1434 * 1435 * <p> Notice that realSync isn't guaranteed to work if recurring 1436 * actions occur, such as if during processing of some event 1437 * another request which may generate some events occurs. By 1438 * default, sync tries to perform as much as {@value #MAX_ITERS} 1439 * cycles of event processing, allowing for roughly {@value 1440 * #MAX_ITERS} additional requests. 1441 * 1442 * <p> For example, requestFocus() generates native request, which 1443 * generates one or two Java focus events, which then generate a 1444 * serie of paint events, a serie of Java focus events, which then 1445 * generate a serie of paint events which then are processed - 1446 * three cycles, minimum. 1447 * 1448 * @param timeout the maximum time to wait in milliseconds, negative means "forever". 1449 */ realSync(final long timeout)1450 public void realSync(final long timeout) throws OperationTimedOut, InfiniteLoop 1451 { 1452 if (EventQueue.isDispatchThread()) { 1453 throw new IllegalThreadException("The SunToolkit.realSync() method cannot be used on the event dispatch thread (EDT)."); 1454 } 1455 int bigLoop = 0; 1456 do { 1457 // Let's do sync first 1458 sync(); 1459 1460 // During the wait process, when we were processing incoming 1461 // events, we could have made some new request, which can 1462 // generate new events. Example: MapNotify/XSetInputFocus. 1463 // Therefore, we dispatch them as long as there is something 1464 // to dispatch. 1465 int iters = 0; 1466 while (iters < MIN_ITERS) { 1467 syncNativeQueue(timeout); 1468 iters++; 1469 } 1470 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1471 iters++; 1472 } 1473 if (iters >= MAX_ITERS) { 1474 throw new InfiniteLoop(); 1475 } 1476 1477 // native requests were dispatched by X/Window Manager or Windows 1478 // Moreover, we processed them all on Toolkit thread 1479 // Now wait while EDT processes them. 1480 // 1481 // During processing of some events (focus, for example), 1482 // some other events could have been generated. So, after 1483 // waitForIdle, we may end up with full EventQueue 1484 iters = 0; 1485 while (iters < MIN_ITERS) { 1486 waitForIdle(timeout); 1487 iters++; 1488 } 1489 while (waitForIdle(timeout) && iters < MAX_ITERS) { 1490 iters++; 1491 } 1492 if (iters >= MAX_ITERS) { 1493 throw new InfiniteLoop(); 1494 } 1495 1496 bigLoop++; 1497 // Again, for Java events, it was simple to check for new Java 1498 // events by checking event queue, but what if Java events 1499 // resulted in native requests? Therefor, check native events again. 1500 } while ((syncNativeQueue(timeout) || waitForIdle(timeout)) && bigLoop < MAX_ITERS); 1501 } 1502 1503 /** 1504 * Platform toolkits need to implement this method to perform the 1505 * sync of the native queue. The method should wait until native 1506 * requests are processed, all native events are processed and 1507 * corresponding Java events are generated. Should return 1508 * {@code true} if some events were processed, 1509 * {@code false} otherwise. 1510 */ syncNativeQueue(final long timeout)1511 protected abstract boolean syncNativeQueue(final long timeout); 1512 1513 private boolean eventDispatched; 1514 private boolean queueEmpty; 1515 private final Object waitLock = new Object(); 1516 isEQEmpty()1517 private boolean isEQEmpty() { 1518 EventQueue queue = getSystemEventQueueImpl(); 1519 return AWTAccessor.getEventQueueAccessor().noEvents(queue); 1520 } 1521 1522 /** 1523 * Waits for the Java event queue to empty. Ensures that all 1524 * events are processed (including paint events), and that if 1525 * recursive events were generated, they are also processed. 1526 * Should return {@code true} if more processing is 1527 * necessary, {@code false} otherwise. 1528 */ 1529 @SuppressWarnings("serial") waitForIdle(final long timeout)1530 protected final boolean waitForIdle(final long timeout) { 1531 flushPendingEvents(); 1532 final boolean queueWasEmpty; 1533 synchronized (waitLock) { 1534 queueWasEmpty = isEQEmpty(); 1535 queueEmpty = false; 1536 eventDispatched = false; 1537 postEvent(AppContext.getAppContext(), 1538 new PeerEvent(getSystemEventQueueImpl(), null, PeerEvent.LOW_PRIORITY_EVENT) { 1539 @Override 1540 public void dispatch() { 1541 // Here we block EDT. It could have some 1542 // events, it should have dispatched them by 1543 // now. So native requests could have been 1544 // generated. First, dispatch them. Then, 1545 // flush Java events again. 1546 int iters = 0; 1547 while (iters < MIN_ITERS) { 1548 syncNativeQueue(timeout); 1549 iters++; 1550 } 1551 while (syncNativeQueue(timeout) && iters < MAX_ITERS) { 1552 iters++; 1553 } 1554 flushPendingEvents(); 1555 1556 synchronized(waitLock) { 1557 queueEmpty = isEQEmpty(); 1558 eventDispatched = true; 1559 waitLock.notifyAll(); 1560 } 1561 } 1562 }); 1563 try { 1564 while (!eventDispatched) { 1565 waitLock.wait(); 1566 } 1567 } catch (InterruptedException ie) { 1568 return false; 1569 } 1570 } 1571 1572 try { 1573 Thread.sleep(MINIMAL_EDELAY); 1574 } catch (InterruptedException ie) { 1575 throw new RuntimeException("Interrupted"); 1576 } 1577 1578 flushPendingEvents(); 1579 1580 // Lock to force write-cache flush for queueEmpty. 1581 synchronized (waitLock) { 1582 return !(queueEmpty && isEQEmpty() && queueWasEmpty); 1583 } 1584 } 1585 1586 /** 1587 * Grabs the mouse input for the given window. The window must be 1588 * visible. The window or its children do not receive any 1589 * additional mouse events besides those targeted to them. All 1590 * other events will be dispatched as before - to the respective 1591 * targets. This Window will receive UngrabEvent when automatic 1592 * ungrab is about to happen. The event can be listened to by 1593 * installing AWTEventListener with WINDOW_EVENT_MASK. See 1594 * UngrabEvent class for the list of conditions when ungrab is 1595 * about to happen. 1596 * @see UngrabEvent 1597 */ grab(Window w)1598 public abstract void grab(Window w); 1599 1600 /** 1601 * Forces ungrab. No event will be sent. 1602 */ ungrab(Window w)1603 public abstract void ungrab(Window w); 1604 showOrHideTouchKeyboard(Component comp, AWTEvent e)1605 public void showOrHideTouchKeyboard(Component comp, AWTEvent e) {} 1606 1607 private static boolean touchKeyboardAutoShowIsEnabled; 1608 isTouchKeyboardAutoShowEnabled()1609 public static boolean isTouchKeyboardAutoShowEnabled() { 1610 return touchKeyboardAutoShowIsEnabled; 1611 } 1612 1613 /** 1614 * Locates the splash screen library in a platform dependent way and closes 1615 * the splash screen. Should be invoked on first top-level frame display. 1616 * @see java.awt.SplashScreen 1617 * @since 1.6 1618 */ closeSplashScreen()1619 public static native void closeSplashScreen(); 1620 1621 /* The following methods and variables are to support retrieving 1622 * desktop text anti-aliasing settings 1623 */ 1624 1625 /* Need an instance method because setDesktopProperty(..) is protected. */ fireDesktopFontPropertyChanges()1626 private void fireDesktopFontPropertyChanges() { 1627 setDesktopProperty(SunToolkit.DESKTOPFONTHINTS, 1628 SunToolkit.getDesktopFontHints()); 1629 } 1630 1631 private static boolean checkedSystemAAFontSettings; 1632 private static boolean useSystemAAFontSettings; 1633 private static boolean lastExtraCondition = true; 1634 private static RenderingHints desktopFontHints; 1635 1636 /* Since Swing is the reason for this "extra condition" logic its 1637 * worth documenting it in some detail. 1638 * First, a goal is for Swing and applications to both retrieve and 1639 * use the same desktop property value so that there is complete 1640 * consistency between the settings used by JDK's Swing implementation 1641 * and 3rd party custom Swing components, custom L&Fs and any general 1642 * text rendering that wants to be consistent with these. 1643 * But by default on Solaris & Linux Swing will not use AA text over 1644 * remote X11 display (unless Xrender can be used which is TBD and may not 1645 * always be available anyway) as that is a noticeable performance hit. 1646 * So there needs to be a way to express that extra condition so that 1647 * it is seen by all clients of the desktop property API. 1648 * If this were the only condition it could be handled here as it would 1649 * be the same for any L&F and could reasonably be considered to be 1650 * a static behaviour of those systems. 1651 * But GTK currently has an additional test based on locale which is 1652 * not applied by Metal. So mixing GTK in a few locales with Metal 1653 * would mean the last one wins. 1654 * This could be stored per-app context which would work 1655 * for different applets, but wouldn't help for a single application 1656 * using GTK and some other L&F concurrently. 1657 * But it is expected this will be addressed within GTK and the font 1658 * system so is a temporary and somewhat unlikely harmless corner case. 1659 */ setAAFontSettingsCondition(boolean extraCondition)1660 public static void setAAFontSettingsCondition(boolean extraCondition) { 1661 if (extraCondition != lastExtraCondition) { 1662 lastExtraCondition = extraCondition; 1663 if (checkedSystemAAFontSettings) { 1664 /* Someone already asked for this info, under a different 1665 * condition. 1666 * We'll force re-evaluation instead of replicating the 1667 * logic, then notify any listeners of any change. 1668 */ 1669 checkedSystemAAFontSettings = false; 1670 Toolkit tk = Toolkit.getDefaultToolkit(); 1671 if (tk instanceof SunToolkit) { 1672 ((SunToolkit)tk).fireDesktopFontPropertyChanges(); 1673 } 1674 } 1675 } 1676 } 1677 1678 /* "false", "off", ""default" aren't explicitly tested, they 1679 * just fall through to produce a null return which all are equated to 1680 * "false". 1681 */ getDesktopAAHintsByName(String hintname)1682 private static RenderingHints getDesktopAAHintsByName(String hintname) { 1683 Object aaHint = null; 1684 hintname = hintname.toLowerCase(Locale.ENGLISH); 1685 if (hintname.equals("on")) { 1686 aaHint = VALUE_TEXT_ANTIALIAS_ON; 1687 } else if (hintname.equals("gasp")) { 1688 aaHint = VALUE_TEXT_ANTIALIAS_GASP; 1689 } else if (hintname.equals("lcd") || hintname.equals("lcd_hrgb")) { 1690 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HRGB; 1691 } else if (hintname.equals("lcd_hbgr")) { 1692 aaHint = VALUE_TEXT_ANTIALIAS_LCD_HBGR; 1693 } else if (hintname.equals("lcd_vrgb")) { 1694 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VRGB; 1695 } else if (hintname.equals("lcd_vbgr")) { 1696 aaHint = VALUE_TEXT_ANTIALIAS_LCD_VBGR; 1697 } 1698 if (aaHint != null) { 1699 RenderingHints map = new RenderingHints(null); 1700 map.put(KEY_TEXT_ANTIALIASING, aaHint); 1701 return map; 1702 } else { 1703 return null; 1704 } 1705 } 1706 1707 /* This method determines whether to use the system font settings, 1708 * or ignore them if a L&F has specified they should be ignored, or 1709 * to override both of these with a system property specified value. 1710 * If the toolkit isn't a SunToolkit, (eg may be headless) then that 1711 * system property isn't applied as desktop properties are considered 1712 * to be inapplicable in that case. In that headless case although 1713 * this method will return "true" the toolkit will return a null map. 1714 */ useSystemAAFontSettings()1715 private static boolean useSystemAAFontSettings() { 1716 if (!checkedSystemAAFontSettings) { 1717 useSystemAAFontSettings = true; /* initially set this true */ 1718 String systemAAFonts = null; 1719 Toolkit tk = Toolkit.getDefaultToolkit(); 1720 if (tk instanceof SunToolkit) { 1721 systemAAFonts = 1722 AccessController.doPrivileged( 1723 new GetPropertyAction("awt.useSystemAAFontSettings")); 1724 } 1725 if (systemAAFonts != null) { 1726 useSystemAAFontSettings = 1727 Boolean.valueOf(systemAAFonts).booleanValue(); 1728 /* If it is anything other than "true", then it may be 1729 * a hint name , or it may be "off, "default", etc. 1730 */ 1731 if (!useSystemAAFontSettings) { 1732 desktopFontHints = getDesktopAAHintsByName(systemAAFonts); 1733 } 1734 } 1735 /* If its still true, apply the extra condition */ 1736 if (useSystemAAFontSettings) { 1737 useSystemAAFontSettings = lastExtraCondition; 1738 } 1739 checkedSystemAAFontSettings = true; 1740 } 1741 return useSystemAAFontSettings; 1742 } 1743 1744 /* A variable defined for the convenience of JDK code */ 1745 public static final String DESKTOPFONTHINTS = "awt.font.desktophints"; 1746 1747 /* Overridden by subclasses to return platform/desktop specific values */ getDesktopAAHints()1748 protected RenderingHints getDesktopAAHints() { 1749 return null; 1750 } 1751 1752 /* Subclass desktop property loading methods call this which 1753 * in turn calls the appropriate subclass implementation of 1754 * getDesktopAAHints() when system settings are being used. 1755 * Its public rather than protected because subclasses may delegate 1756 * to a helper class. 1757 */ getDesktopFontHints()1758 public static RenderingHints getDesktopFontHints() { 1759 if (useSystemAAFontSettings()) { 1760 Toolkit tk = Toolkit.getDefaultToolkit(); 1761 if (tk instanceof SunToolkit) { 1762 Object map = ((SunToolkit)tk).getDesktopAAHints(); 1763 return (RenderingHints)map; 1764 } else { /* Headless Toolkit */ 1765 return null; 1766 } 1767 } else if (desktopFontHints != null) { 1768 /* cloning not necessary as the return value is cloned later, but 1769 * its harmless. 1770 */ 1771 return (RenderingHints)(desktopFontHints.clone()); 1772 } else { 1773 return null; 1774 } 1775 } 1776 1777 isDesktopSupported()1778 public abstract boolean isDesktopSupported(); isTaskbarSupported()1779 public abstract boolean isTaskbarSupported(); 1780 1781 /* 1782 * consumeNextKeyTyped() method is not currently used, 1783 * however Swing could use it in the future. 1784 */ consumeNextKeyTyped(KeyEvent keyEvent)1785 public static synchronized void consumeNextKeyTyped(KeyEvent keyEvent) { 1786 try { 1787 AWTAccessor.getDefaultKeyboardFocusManagerAccessor().consumeNextKeyTyped( 1788 (DefaultKeyboardFocusManager)KeyboardFocusManager. 1789 getCurrentKeyboardFocusManager(), 1790 keyEvent); 1791 } catch (ClassCastException cce) { 1792 cce.printStackTrace(); 1793 } 1794 } 1795 dumpPeers(final PlatformLogger aLog)1796 protected static void dumpPeers(final PlatformLogger aLog) { 1797 AWTAutoShutdown.getInstance().dumpPeers(aLog); 1798 } 1799 1800 /** 1801 * Returns the {@code Window} ancestor of the component {@code comp}. 1802 * @return Window ancestor of the component or component by itself if it is Window; 1803 * null, if component is not a part of window hierarchy 1804 */ getContainingWindow(Component comp)1805 public static Window getContainingWindow(Component comp) { 1806 while (comp != null && !(comp instanceof Window)) { 1807 comp = comp.getParent(); 1808 } 1809 return (Window)comp; 1810 } 1811 1812 private static Boolean sunAwtDisableMixing = null; 1813 1814 /** 1815 * Returns the value of "sun.awt.disableMixing" property. Default 1816 * value is {@code false}. 1817 */ getSunAwtDisableMixing()1818 public static synchronized boolean getSunAwtDisableMixing() { 1819 if (sunAwtDisableMixing == null) { 1820 sunAwtDisableMixing = AccessController.doPrivileged( 1821 new GetBooleanAction("sun.awt.disableMixing")); 1822 } 1823 return sunAwtDisableMixing.booleanValue(); 1824 } 1825 1826 /** 1827 * Returns true if the native GTK libraries are available. The 1828 * default implementation returns false, but UNIXToolkit overrides this 1829 * method to provide a more specific answer. 1830 */ isNativeGTKAvailable()1831 public boolean isNativeGTKAvailable() { 1832 return false; 1833 } 1834 1835 private static final Object DEACTIVATION_TIMES_MAP_KEY = new Object(); 1836 setWindowDeactivationTime(Window w, long time)1837 public synchronized void setWindowDeactivationTime(Window w, long time) { 1838 AppContext ctx = getAppContext(w); 1839 if (ctx == null) { 1840 return; 1841 } 1842 @SuppressWarnings("unchecked") 1843 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1844 if (map == null) { 1845 map = new WeakHashMap<Window, Long>(); 1846 ctx.put(DEACTIVATION_TIMES_MAP_KEY, map); 1847 } 1848 map.put(w, time); 1849 } 1850 getWindowDeactivationTime(Window w)1851 public synchronized long getWindowDeactivationTime(Window w) { 1852 AppContext ctx = getAppContext(w); 1853 if (ctx == null) { 1854 return -1; 1855 } 1856 @SuppressWarnings("unchecked") 1857 WeakHashMap<Window, Long> map = (WeakHashMap<Window, Long>)ctx.get(DEACTIVATION_TIMES_MAP_KEY); 1858 if (map == null) { 1859 return -1; 1860 } 1861 Long time = map.get(w); 1862 return time == null ? -1 : time; 1863 } 1864 updateScreenMenuBarUI()1865 public void updateScreenMenuBarUI() { 1866 } 1867 1868 // Cosntant alpha isWindowOpacitySupported()1869 public boolean isWindowOpacitySupported() { 1870 return false; 1871 } 1872 1873 // Shaping isWindowShapingSupported()1874 public boolean isWindowShapingSupported() { 1875 return false; 1876 } 1877 1878 // Per-pixel alpha isWindowTranslucencySupported()1879 public boolean isWindowTranslucencySupported() { 1880 return false; 1881 } 1882 isTranslucencyCapable(GraphicsConfiguration gc)1883 public boolean isTranslucencyCapable(GraphicsConfiguration gc) { 1884 return false; 1885 } 1886 1887 /** 1888 * Returns true if swing backbuffer should be translucent. 1889 */ isSwingBackbufferTranslucencySupported()1890 public boolean isSwingBackbufferTranslucencySupported() { 1891 return false; 1892 } 1893 1894 /** 1895 * Returns whether or not a containing top level window for the passed 1896 * component is 1897 * {@link GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT PERPIXEL_TRANSLUCENT}. 1898 * 1899 * @param c a Component which toplevel's to check 1900 * @return {@code true} if the passed component is not null and has a 1901 * containing toplevel window which is opaque (so per-pixel translucency 1902 * is not enabled), {@code false} otherwise 1903 * @see GraphicsDevice.WindowTranslucency#PERPIXEL_TRANSLUCENT 1904 */ isContainingTopLevelOpaque(Component c)1905 public static boolean isContainingTopLevelOpaque(Component c) { 1906 Window w = getContainingWindow(c); 1907 return w != null && w.isOpaque(); 1908 } 1909 1910 /** 1911 * Returns whether or not a containing top level window for the passed 1912 * component is 1913 * {@link GraphicsDevice.WindowTranslucency#TRANSLUCENT TRANSLUCENT}. 1914 * 1915 * @param c a Component which toplevel's to check 1916 * @return {@code true} if the passed component is not null and has a 1917 * containing toplevel window which has opacity less than 1918 * 1.0f (which means that it is translucent), {@code false} otherwise 1919 * @see GraphicsDevice.WindowTranslucency#TRANSLUCENT 1920 */ isContainingTopLevelTranslucent(Component c)1921 public static boolean isContainingTopLevelTranslucent(Component c) { 1922 Window w = getContainingWindow(c); 1923 return w != null && w.getOpacity() < 1.0f; 1924 } 1925 1926 /** 1927 * Returns whether the native system requires using the peer.updateWindow() 1928 * method to update the contents of a non-opaque window, or if usual 1929 * painting procedures are sufficient. The default return value covers 1930 * the X11 systems. On MS Windows this method is overriden in WToolkit 1931 * to return true. 1932 */ needUpdateWindow()1933 public boolean needUpdateWindow() { 1934 return false; 1935 } 1936 1937 /** 1938 * Descendants of the SunToolkit should override and put their own logic here. 1939 */ getNumberOfButtons()1940 public int getNumberOfButtons(){ 1941 return 3; 1942 } 1943 1944 /** 1945 * Checks that the given object implements/extends the given 1946 * interface/class. 1947 * 1948 * Note that using the instanceof operator causes a class to be loaded. 1949 * Using this method doesn't load a class and it can be used instead of 1950 * the instanceof operator for performance reasons. 1951 * 1952 * @param obj Object to be checked 1953 * @param type The name of the interface/class. Must be 1954 * fully-qualified interface/class name. 1955 * @return true, if this object implements/extends the given 1956 * interface/class, false, otherwise, or if obj or type is null 1957 */ isInstanceOf(Object obj, String type)1958 public static boolean isInstanceOf(Object obj, String type) { 1959 if (obj == null) return false; 1960 if (type == null) return false; 1961 1962 return isInstanceOf(obj.getClass(), type); 1963 } 1964 isInstanceOf(Class<?> cls, String type)1965 private static boolean isInstanceOf(Class<?> cls, String type) { 1966 if (cls == null) return false; 1967 1968 if (cls.getName().equals(type)) { 1969 return true; 1970 } 1971 1972 for (Class<?> c : cls.getInterfaces()) { 1973 if (c.getName().equals(type)) { 1974 return true; 1975 } 1976 } 1977 return isInstanceOf(cls.getSuperclass(), type); 1978 } 1979 getLightweightFrame(Component c)1980 protected static LightweightFrame getLightweightFrame(Component c) { 1981 for (; c != null; c = c.getParent()) { 1982 if (c instanceof LightweightFrame) { 1983 return (LightweightFrame)c; 1984 } 1985 if (c instanceof Window) { 1986 // Don't traverse owner windows 1987 return null; 1988 } 1989 } 1990 return null; 1991 } 1992 1993 /////////////////////////////////////////////////////////////////////////// 1994 // 1995 // The following methods help set and identify whether a particular 1996 // AWTEvent object was produced by the system or by user code. As of this 1997 // writing the only consumer is the Java Plug-In, although this information 1998 // could be useful to more clients and probably should be formalized in 1999 // the public API. 2000 // 2001 /////////////////////////////////////////////////////////////////////////// 2002 setSystemGenerated(AWTEvent e)2003 public static void setSystemGenerated(AWTEvent e) { 2004 AWTAccessor.getAWTEventAccessor().setSystemGenerated(e); 2005 } 2006 isSystemGenerated(AWTEvent e)2007 public static boolean isSystemGenerated(AWTEvent e) { 2008 return AWTAccessor.getAWTEventAccessor().isSystemGenerated(e); 2009 } 2010 2011 } // class SunToolkit 2012 2013 2014 /* 2015 * PostEventQueue is a Thread that runs in the same AppContext as the 2016 * Java EventQueue. It is a queue of AWTEvents to be posted to the 2017 * Java EventQueue. The toolkit Thread (AWT-Windows/AWT-Motif) posts 2018 * events to this queue, which then calls EventQueue.postEvent(). 2019 * 2020 * We do this because EventQueue.postEvent() may be overridden by client 2021 * code, and we mustn't ever call client code from the toolkit thread. 2022 */ 2023 class PostEventQueue { 2024 private EventQueueItem queueHead = null; 2025 private EventQueueItem queueTail = null; 2026 private final EventQueue eventQueue; 2027 2028 private Thread flushThread = null; 2029 PostEventQueue(EventQueue eq)2030 PostEventQueue(EventQueue eq) { 2031 eventQueue = eq; 2032 } 2033 2034 /* 2035 * Continually post pending AWTEvents to the Java EventQueue. The method 2036 * is synchronized to ensure the flush is completed before a new event 2037 * can be posted to this queue. 2038 * 2039 * 7177040: The method couldn't be wholly synchronized because of calls 2040 * of EventQueue.postEvent() that uses pushPopLock, otherwise it could 2041 * potentially lead to deadlock 2042 */ flush()2043 public void flush() { 2044 2045 Thread newThread = Thread.currentThread(); 2046 2047 try { 2048 EventQueueItem tempQueue; 2049 synchronized (this) { 2050 // Avoid method recursion 2051 if (newThread == flushThread) { 2052 return; 2053 } 2054 // Wait for other threads' flushing 2055 while (flushThread != null) { 2056 wait(); 2057 } 2058 // Skip everything if queue is empty 2059 if (queueHead == null) { 2060 return; 2061 } 2062 // Remember flushing thread 2063 flushThread = newThread; 2064 2065 tempQueue = queueHead; 2066 queueHead = queueTail = null; 2067 } 2068 try { 2069 while (tempQueue != null) { 2070 eventQueue.postEvent(tempQueue.event); 2071 tempQueue = tempQueue.next; 2072 } 2073 } 2074 finally { 2075 // Only the flushing thread can get here 2076 synchronized (this) { 2077 // Forget flushing thread, inform other pending threads 2078 flushThread = null; 2079 notifyAll(); 2080 } 2081 } 2082 } 2083 catch (InterruptedException e) { 2084 // Couldn't allow exception go up, so at least recover the flag 2085 newThread.interrupt(); 2086 } 2087 } 2088 2089 /* 2090 * Enqueue an AWTEvent to be posted to the Java EventQueue. 2091 */ postEvent(AWTEvent event)2092 void postEvent(AWTEvent event) { 2093 EventQueueItem item = new EventQueueItem(event); 2094 2095 synchronized (this) { 2096 if (queueHead == null) { 2097 queueHead = queueTail = item; 2098 } else { 2099 queueTail.next = item; 2100 queueTail = item; 2101 } 2102 } 2103 SunToolkit.wakeupEventQueue(eventQueue, event.getSource() == AWTAutoShutdown.getInstance()); 2104 } 2105 } // class PostEventQueue 2106