1 /*
   2  * Copyright (c) 2012, 2013, 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.lwawt.macosx;
  27 
  28 import java.awt.*;
  29 import java.awt.datatransfer.Clipboard;
  30 import java.awt.dnd.*;
  31 import java.awt.dnd.peer.DragSourceContextPeer;
  32 import java.awt.event.InputEvent;
  33 import java.awt.event.InvocationEvent;
  34 import java.awt.event.KeyEvent;
  35 import java.awt.im.InputMethodHighlight;
  36 import java.awt.peer.*;
  37 import java.lang.reflect.*;
  38 import java.security.*;
  39 import java.util.*;
  40 import java.util.concurrent.Callable;
  41 
  42 import sun.awt.*;
  43 import sun.lwawt.*;
  44 import sun.lwawt.LWWindowPeer.PeerType;
  45 import sun.security.action.GetBooleanAction;
  46 
  47 import sun.util.CoreResourceBundleControl;
  48 
  49 
  50 class NamedCursor extends Cursor {
  51     NamedCursor(String name) {
  52         super(name);
  53     }
  54 }
  55 
  56 /**
  57  * Mac OS X Cocoa-based AWT Toolkit.
  58  */
  59 public final class LWCToolkit extends LWToolkit {
  60     // While it is possible to enumerate all mouse devices
  61     // and query them for the number of buttons, the code
  62     // that does it is rather complex. Instead, we opt for
  63     // the easy way and just support up to 5 mouse buttons,
  64     // like Windows.
  65     private static final int BUTTONS = 5;
  66 
  67     private static native void initIDs();
  68 
  69     private static CInputMethodDescriptor sInputMethodDescriptor;
  70 
  71     static {
  72         System.err.flush();
  73         ResourceBundle platformResources = java.security.AccessController.doPrivileged(
  74                 new java.security.PrivilegedAction<ResourceBundle>() {
  75             public ResourceBundle run() {
  76                 ResourceBundle platformResources = null;
  77                 try {
  78                     platformResources =
  79                             ResourceBundle.getBundle("sun.awt.resources.awtosx",
  80                                     CoreResourceBundleControl.getRBControlInstance());
  81                 } catch (MissingResourceException e) {
  82                     // No resource file; defaults will be used.
  83                 }
  84 
  85                 System.loadLibrary("awt");
  86                 System.loadLibrary("fontmanager");
  87                 return platformResources;
  88             }
  89         });
  90 
  91         AWTAccessor.getToolkitAccessor().setPlatformResources(platformResources);
  92 
  93         if (!GraphicsEnvironment.isHeadless()) {
  94             initIDs();
  95         }
  96     }
  97 
  98     public LWCToolkit() {
  99         SunToolkit.setDataTransfererClassName("sun.lwawt.macosx.CDataTransferer");
 100 
 101         areExtraMouseButtonsEnabled = Boolean.parseBoolean(System.getProperty("sun.awt.enableExtraMouseButtons", "true"));
 102         //set system property if not yet assigned
 103         System.setProperty("sun.awt.enableExtraMouseButtons", ""+areExtraMouseButtonsEnabled);
 104     }
 105 
 106     /*
 107      * System colors with default initial values, overwritten by toolkit if system values differ and are available.
 108      */
 109     private final static int NUM_APPLE_COLORS = 3;
 110     public final static int KEYBOARD_FOCUS_COLOR = 0;
 111     public final static int INACTIVE_SELECTION_BACKGROUND_COLOR = 1;
 112     public final static int INACTIVE_SELECTION_FOREGROUND_COLOR = 2;
 113     private static int[] appleColors = {
 114         0xFF808080, // keyboardFocusColor = Color.gray;
 115         0xFFC0C0C0, // secondarySelectedControlColor
 116         0xFF303030, // controlDarkShadowColor
 117     };
 118 
 119     private native void loadNativeColors(final int[] systemColors, final int[] appleColors);
 120 
 121     protected void loadSystemColors(final int[] systemColors) {
 122         if (systemColors == null) return;
 123         loadNativeColors(systemColors, appleColors);
 124     }
 125 
 126     private static class AppleSpecificColor extends Color {
 127         int index;
 128         public AppleSpecificColor(int index) {
 129             super(appleColors[index]);
 130             this.index = index;
 131         }
 132 
 133         public int getRGB() {
 134             return appleColors[index];
 135         }
 136     }
 137 
 138     /**
 139      * Returns Apple specific colors that we may expose going forward.
 140      *
 141      */
 142     public static Color getAppleColor(int color) {
 143         return new AppleSpecificColor(color);
 144     }
 145 
 146     static void systemColorsChanged() {
 147         // This is only called from native code.
 148         EventQueue.invokeLater(new Runnable() {
 149             public void run() {
 150                 AccessController.doPrivileged (new PrivilegedAction<Object>() {
 151                     public Object run() {
 152                         try {
 153                             final Method updateColorsMethod = SystemColor.class.getDeclaredMethod("updateSystemColors", new Class[0]);
 154                             updateColorsMethod.setAccessible(true);
 155                             updateColorsMethod.invoke(null, new Object[0]);
 156                         } catch (final Throwable e) {
 157                             e.printStackTrace();
 158                             // swallow this if something goes horribly wrong
 159                         }
 160                         return null;
 161                     }
 162                 });
 163             }
 164            });
 165     }
 166 
 167     public static LWCToolkit getLWCToolkit() {
 168         return (LWCToolkit)Toolkit.getDefaultToolkit();
 169     }
 170 
 171     @Override
 172     protected PlatformWindow createPlatformWindow(PeerType peerType) {
 173         if (peerType == PeerType.EMBEDDED_FRAME) {
 174             return new CPlatformEmbeddedFrame();
 175         } else if (peerType == PeerType.VIEW_EMBEDDED_FRAME) {
 176             return new CViewPlatformEmbeddedFrame();
 177         } else {
 178             assert (peerType == PeerType.SIMPLEWINDOW || peerType == PeerType.DIALOG || peerType == PeerType.FRAME);
 179             return new CPlatformWindow();
 180         }
 181     }
 182 
 183     @Override
 184     protected SecurityWarningWindow createSecurityWarning(Window ownerWindow, LWWindowPeer ownerPeer) {
 185         return new CWarningWindow(ownerWindow, ownerPeer);
 186     }
 187 
 188     @Override
 189     protected PlatformComponent createPlatformComponent() {
 190         return new CPlatformComponent();
 191     }
 192 
 193     @Override
 194     protected FileDialogPeer createFileDialogPeer(FileDialog target) {
 195         return new CFileDialog(target);
 196     }
 197 
 198     @Override
 199     public MenuPeer createMenu(Menu target) {
 200         MenuPeer peer = new CMenu(target);
 201         targetCreatedPeer(target, peer);
 202         return peer;
 203     }
 204 
 205     @Override
 206     public MenuBarPeer createMenuBar(MenuBar target) {
 207         MenuBarPeer peer = new CMenuBar(target);
 208         targetCreatedPeer(target, peer);
 209         return peer;
 210     }
 211 
 212     @Override
 213     public MenuItemPeer createMenuItem(MenuItem target) {
 214         MenuItemPeer peer = new CMenuItem(target);
 215         targetCreatedPeer(target, peer);
 216         return peer;
 217     }
 218 
 219     @Override
 220     public CheckboxMenuItemPeer createCheckboxMenuItem(CheckboxMenuItem target) {
 221         CheckboxMenuItemPeer peer = new CCheckboxMenuItem(target);
 222         targetCreatedPeer(target, peer);
 223         return peer;
 224     }
 225 
 226     @Override
 227     public PopupMenuPeer createPopupMenu(PopupMenu target) {
 228         PopupMenuPeer peer = new CPopupMenu(target);
 229         targetCreatedPeer(target, peer);
 230         return peer;
 231 
 232     }
 233 
 234     @Override
 235     public SystemTrayPeer createSystemTray(SystemTray target) {
 236         SystemTrayPeer peer = new CSystemTray();
 237         return peer;
 238     }
 239 
 240     @Override
 241     public TrayIconPeer createTrayIcon(TrayIcon target) {
 242         TrayIconPeer peer = new CTrayIcon(target);
 243         targetCreatedPeer(target, peer);
 244         return peer;
 245     }
 246 
 247     @Override
 248     public LWCursorManager getCursorManager() {
 249         return CCursorManager.getInstance();
 250     }
 251 
 252     @Override
 253     public Cursor createCustomCursor(final Image cursor, final Point hotSpot, final String name) throws IndexOutOfBoundsException, HeadlessException {
 254         return new CCustomCursor(cursor, hotSpot, name);
 255     }
 256 
 257     @Override
 258     public Dimension getBestCursorSize(final int preferredWidth, final int preferredHeight) throws HeadlessException {
 259         return CCustomCursor.getBestCursorSize(preferredWidth, preferredHeight);
 260     }
 261 
 262     @Override
 263     protected void platformCleanup() {
 264         // TODO Auto-generated method stub
 265 
 266     }
 267 
 268     @Override
 269     protected void platformInit() {
 270         // TODO Auto-generated method stub
 271 
 272     }
 273 
 274     @Override
 275     protected void platformRunMessage() {
 276         // TODO Auto-generated method stub
 277 
 278     }
 279 
 280     @Override
 281     protected void platformShutdown() {
 282         // TODO Auto-generated method stub
 283 
 284     }
 285 
 286     class OSXPlatformFont extends sun.awt.PlatformFont
 287     {
 288         public OSXPlatformFont(String name, int style)
 289         {
 290             super(name, style);
 291         }
 292         protected char getMissingGlyphCharacter()
 293         {
 294             // Follow up for real implementation
 295             return (char)0xfff8; // see http://developer.apple.com/fonts/LastResortFont/
 296         }
 297     }
 298     public FontPeer getFontPeer(String name, int style) {
 299         return new OSXPlatformFont(name, style);
 300     }
 301 
 302     @Override
 303     protected MouseInfoPeer createMouseInfoPeerImpl() {
 304         return new CMouseInfoPeer();
 305     }
 306 
 307     @Override
 308     protected int getScreenHeight() {
 309         return GraphicsEnvironment.getLocalGraphicsEnvironment()
 310                 .getDefaultScreenDevice().getDefaultConfiguration().getBounds().height;
 311     }
 312 
 313     @Override
 314     protected int getScreenWidth() {
 315         return GraphicsEnvironment.getLocalGraphicsEnvironment()
 316                 .getDefaultScreenDevice().getDefaultConfiguration().getBounds().width;
 317     }
 318 
 319     @Override
 320     protected void initializeDesktopProperties() {
 321         super.initializeDesktopProperties();
 322         Map <Object, Object> fontHints = new HashMap<Object, Object>();
 323         fontHints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 324         fontHints.put(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 325         desktopProperties.put(SunToolkit.DESKTOPFONTHINTS, fontHints);
 326         desktopProperties.put("awt.mouse.numButtons", BUTTONS);
 327 
 328         // These DnD properties must be set, otherwise Swing ends up spewing NPEs
 329         // all over the place. The values came straight off of MToolkit.
 330         desktopProperties.put("DnD.Autoscroll.initialDelay", new Integer(50));
 331         desktopProperties.put("DnD.Autoscroll.interval", new Integer(50));
 332         desktopProperties.put("DnD.Autoscroll.cursorHysteresis", new Integer(5));
 333 
 334         desktopProperties.put("DnD.isDragImageSupported", new Boolean(true));
 335 
 336         // Register DnD cursors
 337         desktopProperties.put("DnD.Cursor.CopyDrop", new NamedCursor("DnD.Cursor.CopyDrop"));
 338         desktopProperties.put("DnD.Cursor.MoveDrop", new NamedCursor("DnD.Cursor.MoveDrop"));
 339         desktopProperties.put("DnD.Cursor.LinkDrop", new NamedCursor("DnD.Cursor.LinkDrop"));
 340         desktopProperties.put("DnD.Cursor.CopyNoDrop", new NamedCursor("DnD.Cursor.CopyNoDrop"));
 341         desktopProperties.put("DnD.Cursor.MoveNoDrop", new NamedCursor("DnD.Cursor.MoveNoDrop"));
 342         desktopProperties.put("DnD.Cursor.LinkNoDrop", new NamedCursor("DnD.Cursor.LinkNoDrop"));
 343 
 344     }
 345 
 346 
 347 /*
 348  * The method returns true if some events were processed during that timeout.
 349  * @see sun.awt.SunToolkit#syncNativeQueue(long)
 350  */
 351     @Override
 352     protected boolean syncNativeQueue(long timeout) {
 353         return nativeSyncQueue(timeout);
 354     }
 355 
 356     @Override
 357     public native void beep();
 358 
 359     @Override
 360     public int getScreenResolution() throws HeadlessException {
 361         return (int) ((CGraphicsDevice) GraphicsEnvironment
 362                 .getLocalGraphicsEnvironment().getDefaultScreenDevice())
 363                 .getXResolution();
 364     }
 365 
 366     @Override
 367     public Insets getScreenInsets(final GraphicsConfiguration gc) {
 368         return ((CGraphicsConfig) gc).getDevice().getScreenInsets();
 369     }
 370 
 371     @Override
 372     public void sync() {
 373         // TODO Auto-generated method stub
 374 
 375     }
 376 
 377     @Override
 378     public RobotPeer createRobot(Robot target, GraphicsDevice screen) {
 379         return new CRobot(target, (CGraphicsDevice)screen);
 380     }
 381 
 382     private native boolean isCapsLockOn();
 383 
 384     /*
 385      * NOTE: Among the keys this method is supposed to check,
 386      * only Caps Lock works as a true locking key with OS X.
 387      * There is no Scroll Lock key on modern Apple keyboards,
 388      * and with a PC keyboard plugged in Scroll Lock is simply
 389      * ignored: no LED lights up if you press it.
 390      * The key located at the same position on Apple keyboards
 391      * as Num Lock on PC keyboards is called Clear, doesn't lock
 392      * anything and is used for entirely different purpose.
 393      */
 394     public boolean getLockingKeyState(int keyCode) throws UnsupportedOperationException {
 395         switch (keyCode) {
 396             case KeyEvent.VK_NUM_LOCK:
 397             case KeyEvent.VK_SCROLL_LOCK:
 398             case KeyEvent.VK_KANA_LOCK:
 399                 throw new UnsupportedOperationException("Toolkit.getLockingKeyState");
 400 
 401             case KeyEvent.VK_CAPS_LOCK:
 402                 return isCapsLockOn();
 403 
 404             default:
 405                 throw new IllegalArgumentException("invalid key for Toolkit.getLockingKeyState");
 406         }
 407     }
 408 
 409     //Is it allowed to generate events assigned to extra mouse buttons.
 410     //Set to true by default.
 411     private static boolean areExtraMouseButtonsEnabled = true;
 412 
 413     public boolean areExtraMouseButtonsEnabled() throws HeadlessException {
 414         return areExtraMouseButtonsEnabled;
 415     }
 416 
 417     public int getNumberOfButtons(){
 418         return BUTTONS;
 419     }
 420 
 421     @Override
 422     public boolean isTraySupported() {
 423         return true;
 424     }
 425 
 426     @Override
 427     public boolean isAlwaysOnTopSupported() {
 428         return true;
 429     }
 430 
 431     // Intended to be called from the LWCToolkit.m only.
 432     private static void installToolkitThreadNameInJava() {
 433         Thread.currentThread().setName(CThreading.APPKIT_THREAD_NAME);
 434     }
 435 
 436     @Override
 437     public boolean isWindowOpacitySupported() {
 438         return true;
 439     }
 440 
 441     @Override
 442     public boolean isFrameStateSupported(int state) throws HeadlessException {
 443         switch (state) {
 444             case Frame.NORMAL:
 445             case Frame.ICONIFIED:
 446             case Frame.MAXIMIZED_BOTH:
 447                 return true;
 448             default:
 449                 return false;
 450         }
 451     }
 452 
 453     /**
 454      * Determines which modifier key is the appropriate accelerator
 455      * key for menu shortcuts.
 456      * <p>
 457      * Menu shortcuts, which are embodied in the
 458      * <code>MenuShortcut</code> class, are handled by the
 459      * <code>MenuBar</code> class.
 460      * <p>
 461      * By default, this method returns <code>Event.CTRL_MASK</code>.
 462      * Toolkit implementations should override this method if the
 463      * <b>Control</b> key isn't the correct key for accelerators.
 464      * @return    the modifier mask on the <code>Event</code> class
 465      *                 that is used for menu shortcuts on this toolkit.
 466      * @see       java.awt.MenuBar
 467      * @see       java.awt.MenuShortcut
 468      * @since     JDK1.1
 469      */
 470     public int getMenuShortcutKeyMask() {
 471         return Event.META_MASK;
 472     }
 473 
 474     @Override
 475     public Image getImage(final String filename) {
 476         final Image nsImage = checkForNSImage(filename);
 477         if (nsImage != null) return nsImage;
 478 
 479         return super.getImage(filename);
 480     }
 481 
 482     static final String nsImagePrefix = "NSImage://";
 483     protected Image checkForNSImage(final String imageName) {
 484         if (imageName == null) return null;
 485         if (!imageName.startsWith(nsImagePrefix)) return null;
 486         return CImage.getCreator().createImageFromName(imageName.substring(nsImagePrefix.length()));
 487     }
 488 
 489     // Thread-safe Object.equals() called from native
 490     public static boolean doEquals(final Object a, final Object b, Component c) {
 491         if (a == b) return true;
 492 
 493         final boolean[] ret = new boolean[1];
 494 
 495         try {  invokeAndWait(new Runnable() { public void run() { synchronized(ret) {
 496             ret[0] = a.equals(b);
 497         }}}, c); } catch (Exception e) { e.printStackTrace(); }
 498 
 499         synchronized(ret) { return ret[0]; }
 500     }
 501 
 502     public static <T> T invokeAndWait(final Callable<T> callable, Component component) throws Exception {
 503         final CallableWrapper<T> wrapper = new CallableWrapper<T>(callable);
 504         invokeAndWait(wrapper, component);
 505         return wrapper.getResult();
 506     }
 507 
 508     static final class CallableWrapper<T> implements Runnable {
 509         final Callable<T> callable;
 510         T object;
 511         Exception e;
 512 
 513         public CallableWrapper(final Callable<T> callable) {
 514             this.callable = callable;
 515         }
 516 
 517         public void run() {
 518             try {
 519                 object = callable.call();
 520             } catch (final Exception e) {
 521                 this.e = e;
 522             }
 523         }
 524 
 525         public T getResult() throws Exception {
 526             if (e != null) throw e;
 527             return object;
 528         }
 529     }
 530 
 531     // Kicks an event over to the appropriate eventqueue and waits for it to finish
 532     // To avoid deadlocking, we manually run the NSRunLoop while waiting
 533     // Any selector invoked using ThreadUtilities performOnMainThread will be processed in doAWTRunLoop
 534     // The InvocationEvent will call LWCToolkit.stopAWTRunLoop() when finished, which will stop our manual runloop
 535     // Does not dispatch native events while in the loop
 536     public static void invokeAndWait(Runnable event, Component component) throws InterruptedException, InvocationTargetException {
 537         final long mediator = createAWTRunLoopMediator();
 538 
 539         InvocationEvent invocationEvent =
 540                 new InvocationEvent(component != null ? component : Toolkit.getDefaultToolkit(), event) {
 541                     @Override
 542                     public void dispatch() {
 543                         try {
 544                             super.dispatch();
 545                         } finally {
 546                             if (mediator != 0) {
 547                                 stopAWTRunLoop(mediator);
 548                             }
 549                         }
 550                     }
 551                 };
 552 
 553         if (component != null) {
 554             AppContext appContext = SunToolkit.targetToAppContext(component);
 555             SunToolkit.postEvent(appContext, invocationEvent);
 556 
 557             // 3746956 - flush events from PostEventQueue to prevent them from getting stuck and causing a deadlock
 558             sun.awt.SunToolkitSubclass.flushPendingEvents(appContext);
 559         } else {
 560             // This should be the equivalent to EventQueue.invokeAndWait
 561             ((LWCToolkit)Toolkit.getDefaultToolkit()).getSystemEventQueueForInvokeAndWait().postEvent(invocationEvent);
 562         }
 563 
 564         doAWTRunLoop(mediator, false);
 565 
 566         Throwable eventException = invocationEvent.getException();
 567         if (eventException != null) {
 568             if (eventException instanceof UndeclaredThrowableException) {
 569                 eventException = ((UndeclaredThrowableException)eventException).getUndeclaredThrowable();
 570             }
 571             throw new InvocationTargetException(eventException);
 572         }
 573     }
 574 
 575     public static void invokeLater(Runnable event, Component component) throws InvocationTargetException {
 576         final InvocationEvent invocationEvent =
 577                 new InvocationEvent(component != null ? component : Toolkit.getDefaultToolkit(), event);
 578 
 579         if (component != null) {
 580             final AppContext appContext = SunToolkit.targetToAppContext(component);
 581             SunToolkit.postEvent(appContext, invocationEvent);
 582 
 583             // 3746956 - flush events from PostEventQueue to prevent them from getting stuck and causing a deadlock
 584             sun.awt.SunToolkitSubclass.flushPendingEvents(appContext);
 585         } else {
 586             // This should be the equivalent to EventQueue.invokeAndWait
 587             ((LWCToolkit)Toolkit.getDefaultToolkit()).getSystemEventQueueForInvokeAndWait().postEvent(invocationEvent);
 588         }
 589 
 590         final Throwable eventException = invocationEvent.getException();
 591         if (eventException == null) return;
 592 
 593         if (eventException instanceof UndeclaredThrowableException) {
 594             throw new InvocationTargetException(((UndeclaredThrowableException)eventException).getUndeclaredThrowable());
 595         }
 596         throw new InvocationTargetException(eventException);
 597     }
 598 
 599     // This exists purely to get around permissions issues with getSystemEventQueueImpl
 600     EventQueue getSystemEventQueueForInvokeAndWait() {
 601         return getSystemEventQueueImpl();
 602     }
 603 
 604 
 605 // DnD support
 606 
 607     public DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException {
 608         DragSourceContextPeer dscp = CDragSourceContextPeer.createDragSourceContextPeer(dge);
 609 
 610         return dscp;
 611     }
 612 
 613     public <T extends DragGestureRecognizer> T createDragGestureRecognizer(Class<T> abstractRecognizerClass, DragSource ds, Component c, int srcActions, DragGestureListener dgl) {
 614         DragGestureRecognizer dgr = null;
 615 
 616         // Create a new mouse drag gesture recognizer if we have a class match:
 617         if (MouseDragGestureRecognizer.class.equals(abstractRecognizerClass))
 618             dgr = new CMouseDragGestureRecognizer(ds, c, srcActions, dgl);
 619 
 620         return (T)dgr;
 621     }
 622 
 623 // InputMethodSupport Method
 624     /**
 625      * Returns the default keyboard locale of the underlying operating system
 626      */
 627     public Locale getDefaultKeyboardLocale() {
 628         Locale locale = CInputMethod.getNativeLocale();
 629 
 630         if (locale == null) {
 631             return super.getDefaultKeyboardLocale();
 632         }
 633 
 634         return locale;
 635     }
 636 
 637     public java.awt.im.spi.InputMethodDescriptor getInputMethodAdapterDescriptor() {
 638         if (sInputMethodDescriptor == null)
 639             sInputMethodDescriptor = new CInputMethodDescriptor();
 640 
 641         return sInputMethodDescriptor;
 642     }
 643 
 644     /**
 645      * Returns a map of visual attributes for thelevel description
 646      * of the given input method highlight, or null if no mapping is found.
 647      * The style field of the input method highlight is ignored. The map
 648      * returned is unmodifiable.
 649      * @param highlight input method highlight
 650      * @return style attribute map, or null
 651      * @since 1.3
 652      */
 653     public Map mapInputMethodHighlight(InputMethodHighlight highlight) {
 654         return CInputMethod.mapInputMethodHighlight(highlight);
 655     }
 656 
 657     /**
 658      * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
 659      */
 660     @Override
 661     public int getFocusAcceleratorKeyMask() {
 662         return InputEvent.CTRL_MASK | InputEvent.ALT_MASK;
 663     }
 664 
 665     /**
 666      * Tests whether specified key modifiers mask can be used to enter a printable
 667      * character.
 668      */
 669     @Override
 670     public boolean isPrintableCharacterModifiersMask(int mods) {
 671         return ((mods & (InputEvent.META_MASK | InputEvent.CTRL_MASK)) == 0);
 672     }
 673 
 674     /**
 675      * Returns whether popup is allowed to be shown above the task bar.
 676      */
 677     @Override
 678     public boolean canPopupOverlapTaskBar() {
 679         return false;
 680     }
 681 
 682     private static Boolean sunAwtDisableCALayers = null;
 683 
 684     /**
 685      * Returns the value of "sun.awt.disableCALayers" property. Default
 686      * value is {@code false}.
 687      */
 688     public synchronized static boolean getSunAwtDisableCALayers() {
 689         if (sunAwtDisableCALayers == null) {
 690             sunAwtDisableCALayers = AccessController.doPrivileged(
 691                 new GetBooleanAction("sun.awt.disableCALayers"));
 692         }
 693         return sunAwtDisableCALayers.booleanValue();
 694     }
 695 
 696 
 697     /*
 698      * Returns true if the application (one of its windows) owns keyboard focus.
 699      */
 700     public native boolean isApplicationActive();
 701 
 702     /************************
 703      * Native methods section
 704      ************************/
 705 
 706     static native long createAWTRunLoopMediator();
 707     /**
 708      * Method to run a nested run-loop. The nested loop is spinned in the javaRunLoop mode, so selectors sent
 709      * by [JNFRunLoop performOnMainThreadWaiting] are processed.
 710      * @param mediator a native pointer to the mediator object created by createAWTRunLoopMediator
 711      * @param processEvents if true - dispatches event while in the nested loop. Used in DnD.
 712      *                      Additional attention is needed when using this feature as we short-circuit normal event
 713      *                      processing which could break Appkit.
 714      *                      (One known example is when the window is resized with the mouse)
 715      *
 716      *                      if false - all events come after exit form the nested loop
 717      */
 718     static native void doAWTRunLoop(long mediator, boolean processEvents);
 719     static native void stopAWTRunLoop(long mediator);
 720 
 721     private native boolean nativeSyncQueue(long timeout);
 722 
 723     @Override
 724     public Clipboard createPlatformClipboard() {
 725         return new CClipboard("System");
 726     }
 727 
 728     @Override
 729     public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
 730         return (exclusionType == null) ||
 731             (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE) ||
 732             (exclusionType == Dialog.ModalExclusionType.APPLICATION_EXCLUDE) ||
 733             (exclusionType == Dialog.ModalExclusionType.TOOLKIT_EXCLUDE);
 734     }
 735 
 736     @Override
 737     public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
 738         //TODO: FileDialog blocks excluded windows...
 739         //TODO: Test: 2 file dialogs, separate AppContexts: a) Dialog 1 blocked, shouldn't be. Frame 4 blocked (shouldn't be).
 740         return (modalityType == null) ||
 741             (modalityType == Dialog.ModalityType.MODELESS) ||
 742             (modalityType == Dialog.ModalityType.DOCUMENT_MODAL) ||
 743             (modalityType == Dialog.ModalityType.APPLICATION_MODAL) ||
 744             (modalityType == Dialog.ModalityType.TOOLKIT_MODAL);
 745     }
 746 
 747     @Override
 748     public boolean isWindowShapingSupported() {
 749         return true;
 750     }
 751 
 752     @Override
 753     public boolean isWindowTranslucencySupported() {
 754         return true;
 755     }
 756 
 757     @Override
 758     public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
 759         return true;
 760     }
 761 
 762     public boolean isSwingBackbufferTranslucencySupported() {
 763         return true;
 764     }
 765 
 766     @Override
 767     public boolean enableInputMethodsForTextComponent() {
 768         return true;
 769     }
 770 }