1 /*
   2  * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.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 class NamedCursor extends Cursor {
  48     NamedCursor(String name) {
  49         super(name);
  50     }
  51 }
  52 
  53 /**
  54  * Mac OS X Cocoa-based AWT Toolkit.
  55  */
  56 public class LWCToolkit extends LWToolkit {
  57     // While it is possible to enumerate all mouse devices
  58     // and query them for the number of buttons, the code
  59     // that does it is rather complex. Instead, we opt for
  60     // the easy way and just support up to 5 mouse buttons,
  61     // like Windows.
  62     private static final int BUTTONS = 5;
  63 
  64     private static native void initIDs();
  65 
  66     static native void executeNextAppKitEvent();
  67 
  68     private static CInputMethodDescriptor sInputMethodDescriptor;
  69 
  70     static {
  71         System.err.flush();
  72         java.security.AccessController.doPrivileged(new java.security.PrivilegedAction<Object>() {
  73             public Object run() {
  74                 System.loadLibrary("awt");
  75                 System.loadLibrary("fontmanager");
  76                 return null;
  77             }
  78         });
  79         if (!GraphicsEnvironment.isHeadless()) {
  80             initIDs();
  81         }
  82     }
  83 
  84     public LWCToolkit() {
  85         SunToolkit.setDataTransfererClassName("sun.lwawt.macosx.CDataTransferer");
  86 
  87         areExtraMouseButtonsEnabled = Boolean.parseBoolean(System.getProperty("sun.awt.enableExtraMouseButtons", "true"));
  88         //set system property if not yet assigned
  89         System.setProperty("sun.awt.enableExtraMouseButtons", ""+areExtraMouseButtonsEnabled);
  90     }
  91 
  92     /*
  93      * System colors with default initial values, overwritten by toolkit if system values differ and are available.
  94      */
  95     private final static int NUM_APPLE_COLORS = 3;
  96     public final static int KEYBOARD_FOCUS_COLOR = 0;
  97     public final static int INACTIVE_SELECTION_BACKGROUND_COLOR = 1;
  98     public final static int INACTIVE_SELECTION_FOREGROUND_COLOR = 2;
  99     private static int[] appleColors = {
 100         0xFF808080, // keyboardFocusColor = Color.gray;
 101         0xFFC0C0C0, // secondarySelectedControlColor
 102         0xFF303030, // controlDarkShadowColor
 103     };
 104 
 105     private native void loadNativeColors(final int[] systemColors, final int[] appleColors);
 106 
 107     protected void loadSystemColors(final int[] systemColors) {
 108         if (systemColors == null) return;
 109         loadNativeColors(systemColors, appleColors);
 110     }
 111 
 112     private static class AppleSpecificColor extends Color {
 113         int index;
 114         public AppleSpecificColor(int index) {
 115             super(appleColors[index]);
 116             this.index = index;
 117         }
 118 
 119         public int getRGB() {
 120             return appleColors[index];
 121         }
 122     }
 123 
 124     /**
 125      * Returns Apple specific colors that we may expose going forward.
 126      *
 127      */
 128     public static Color getAppleColor(int color) {
 129         return new AppleSpecificColor(color);
 130     }
 131 
 132     static void systemColorsChanged() {
 133         // This is only called from native code.
 134         EventQueue.invokeLater(new Runnable() {
 135             public void run() {
 136                 AccessController.doPrivileged (new PrivilegedAction<Object>() {
 137                     public Object run() {
 138                         try {
 139                             final Method updateColorsMethod = SystemColor.class.getDeclaredMethod("updateSystemColors", new Class[0]);
 140                             updateColorsMethod.setAccessible(true);
 141                             updateColorsMethod.invoke(null, new Object[0]);
 142                         } catch (final Throwable e) {
 143                             e.printStackTrace();
 144                             // swallow this if something goes horribly wrong
 145                         }
 146                         return null;
 147                     }
 148                 });
 149             }
 150            });
 151     }
 152 
 153     @Override
 154     protected PlatformWindow createPlatformWindow(PeerType peerType) {
 155         if (peerType == PeerType.EMBEDDEDFRAME) {
 156             return new CPlatformEmbeddedFrame();
 157         } else {
 158             return new CPlatformWindow(peerType);
 159         }
 160     }
 161 
 162     @Override
 163     protected PlatformComponent createPlatformComponent() {
 164         return new CPlatformComponent();
 165     }
 166 
 167     @Override
 168     protected FileDialogPeer createFileDialogPeer(FileDialog target) {
 169         return new CFileDialog(target);
 170     }
 171 
 172     @Override
 173     public MenuPeer createMenu(Menu target) {
 174         MenuPeer peer = new CMenu(target);
 175         targetCreatedPeer(target, peer);
 176         return peer;
 177     }
 178 
 179     @Override
 180     public MenuBarPeer createMenuBar(MenuBar target) {
 181          MenuBarPeer peer = new CMenuBar(target);
 182          targetCreatedPeer(target, peer);
 183              return peer;
 184     }
 185 
 186     @Override
 187     public MenuItemPeer createMenuItem(MenuItem target) {
 188         MenuItemPeer peer = new CMenuItem(target);
 189         targetCreatedPeer(target, peer);
 190         return peer;
 191     }
 192 
 193     @Override
 194     public CheckboxMenuItemPeer createCheckboxMenuItem(CheckboxMenuItem target) {
 195         CheckboxMenuItemPeer peer = new CCheckboxMenuItem(target);
 196         targetCreatedPeer(target, peer);
 197         return peer;
 198     }
 199 
 200     @Override
 201     public PopupMenuPeer createPopupMenu(PopupMenu target) {
 202         PopupMenuPeer peer = new CPopupMenu(target);
 203         targetCreatedPeer(target, peer);
 204         return peer;
 205 
 206     }
 207 
 208     @Override
 209     public SystemTrayPeer createSystemTray(SystemTray target) {
 210         SystemTrayPeer peer = new CSystemTray();
 211         return peer;
 212     }
 213 
 214     @Override
 215     public TrayIconPeer createTrayIcon(TrayIcon target) {
 216         TrayIconPeer peer = new CTrayIcon(target);
 217         targetCreatedPeer(target, peer);
 218         return peer;
 219     }
 220 
 221     @Override
 222     public LWCursorManager getCursorManager() {
 223         return CCursorManager.getInstance();
 224     }
 225 
 226     @Override
 227     public Cursor createCustomCursor(final Image cursor, final Point hotSpot, final String name) throws IndexOutOfBoundsException, HeadlessException {
 228         return new CCustomCursor(cursor, hotSpot, name);
 229     }
 230 
 231     @Override
 232     public Dimension getBestCursorSize(final int preferredWidth, final int preferredHeight) throws HeadlessException {
 233         return CCustomCursor.getBestCursorSize(preferredWidth, preferredHeight);
 234     }
 235 
 236     @Override
 237     protected void platformCleanup() {
 238         // TODO Auto-generated method stub
 239 
 240     }
 241 
 242     @Override
 243     protected void platformInit() {
 244         // TODO Auto-generated method stub
 245 
 246     }
 247 
 248     @Override
 249     protected void platformRunMessage() {
 250         // TODO Auto-generated method stub
 251 
 252     }
 253 
 254     @Override
 255     protected void platformShutdown() {
 256         // TODO Auto-generated method stub
 257 
 258     }
 259 
 260     class OSXPlatformFont extends sun.awt.PlatformFont
 261     {
 262         public OSXPlatformFont(String name, int style)
 263         {
 264             super(name, style);
 265         }
 266         protected char getMissingGlyphCharacter()
 267         {
 268             // Follow up for real implementation
 269             return (char)0xfff8; // see http://developer.apple.com/fonts/LastResortFont/
 270         }
 271     }
 272     public FontPeer getFontPeer(String name, int style) {
 273         return new OSXPlatformFont(name, style);
 274     }
 275 
 276     @Override
 277     protected MouseInfoPeer createMouseInfoPeerImpl() {
 278         return new CMouseInfoPeer();
 279     }
 280 
 281 
 282     @Override
 283     protected int getScreenHeight() {
 284         return GraphicsEnvironment.getLocalGraphicsEnvironment()
 285                 .getDefaultScreenDevice().getDefaultConfiguration().getBounds().height;
 286     }
 287 
 288     @Override
 289     protected int getScreenWidth() {
 290         return GraphicsEnvironment.getLocalGraphicsEnvironment()
 291                 .getDefaultScreenDevice().getDefaultConfiguration().getBounds().width;
 292     }
 293 
 294     @Override
 295     protected void initializeDesktopProperties() {
 296         super.initializeDesktopProperties();
 297         Map <Object, Object> fontHints = new HashMap<Object, Object>();
 298         fontHints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 299         fontHints.put(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
 300         desktopProperties.put(SunToolkit.DESKTOPFONTHINTS, fontHints);
 301         desktopProperties.put("awt.mouse.numButtons", BUTTONS);
 302 
 303         // These DnD properties must be set, otherwise Swing ends up spewing NPEs
 304         // all over the place. The values came straight off of MToolkit.
 305         desktopProperties.put("DnD.Autoscroll.initialDelay", new Integer(50));
 306         desktopProperties.put("DnD.Autoscroll.interval", new Integer(50));
 307         desktopProperties.put("DnD.Autoscroll.cursorHysteresis", new Integer(5));
 308 
 309         desktopProperties.put("DnD.isDragImageSupported", new Boolean(true));
 310 
 311         // Register DnD cursors
 312         desktopProperties.put("DnD.Cursor.CopyDrop", new NamedCursor("DnD.Cursor.CopyDrop"));
 313         desktopProperties.put("DnD.Cursor.MoveDrop", new NamedCursor("DnD.Cursor.MoveDrop"));
 314         desktopProperties.put("DnD.Cursor.LinkDrop", new NamedCursor("DnD.Cursor.LinkDrop"));
 315         desktopProperties.put("DnD.Cursor.CopyNoDrop", new NamedCursor("DnD.Cursor.CopyNoDrop"));
 316         desktopProperties.put("DnD.Cursor.MoveNoDrop", new NamedCursor("DnD.Cursor.MoveNoDrop"));
 317         desktopProperties.put("DnD.Cursor.LinkNoDrop", new NamedCursor("DnD.Cursor.LinkNoDrop"));
 318 
 319     }
 320 
 321 
 322 /*
 323  * The method returns true if some events were processed during that timeout.
 324  * @see sun.awt.SunToolkit#syncNativeQueue(long)
 325  */
 326     @Override
 327     protected boolean syncNativeQueue(long timeout) {
 328         return nativeSyncQueue(timeout);
 329     }
 330 
 331     @Override
 332     public native void beep();
 333 
 334     @Override
 335     public int getScreenResolution() throws HeadlessException {
 336         return ((CGraphicsDevice) GraphicsEnvironment
 337                 .getLocalGraphicsEnvironment().getDefaultScreenDevice()).getScreenResolution();
 338     }
 339 
 340     @Override
 341     public Insets getScreenInsets(final GraphicsConfiguration gc) {
 342         final CGraphicsConfig cgc = (CGraphicsConfig) gc;
 343         final int displayId = cgc.getDevice().getCoreGraphicsScreen();
 344         Rectangle fullScreen, workArea;
 345         final long screen = CWrapper.NSScreen.screenByDisplayId(displayId);
 346         try {
 347             fullScreen = CWrapper.NSScreen.frame(screen).getBounds();
 348             workArea = CWrapper.NSScreen.visibleFrame(screen).getBounds();
 349         } finally {
 350             CWrapper.NSObject.release(screen);
 351         }
 352         // Convert between Cocoa's coordinate system and Java.
 353         int bottom = workArea.y - fullScreen.y;
 354         int top = fullScreen.height - workArea.height - bottom;
 355         int left = workArea.x - fullScreen.x;
 356         int right = fullScreen.width - workArea.width - left;
 357         return  new Insets(top, left, bottom, right);
 358     }
 359 
 360     @Override
 361     public void sync() {
 362         // TODO Auto-generated method stub
 363 
 364     }
 365 
 366     @Override
 367     public RobotPeer createRobot(Robot target, GraphicsDevice screen) {
 368         return new CRobot(target, (CGraphicsDevice)screen);
 369     }
 370 
 371     private native boolean isCapsLockOn();
 372 
 373     /*
 374      * NOTE: Among the keys this method is supposed to check,
 375      * only Caps Lock works as a true locking key with OS X.
 376      * There is no Scroll Lock key on modern Apple keyboards,
 377      * and with a PC keyboard plugged in Scroll Lock is simply
 378      * ignored: no LED lights up if you press it.
 379      * The key located at the same position on Apple keyboards
 380      * as Num Lock on PC keyboards is called Clear, doesn't lock
 381      * anything and is used for entirely different purpose.
 382      */
 383     public boolean getLockingKeyState(int keyCode) throws UnsupportedOperationException {
 384         switch (keyCode) {
 385             case KeyEvent.VK_NUM_LOCK:
 386             case KeyEvent.VK_SCROLL_LOCK:
 387             case KeyEvent.VK_KANA_LOCK:
 388                 throw new UnsupportedOperationException("Toolkit.getLockingKeyState");
 389 
 390             case KeyEvent.VK_CAPS_LOCK:
 391                 return isCapsLockOn();
 392 
 393             default:
 394                 throw new IllegalArgumentException("invalid key for Toolkit.getLockingKeyState");
 395         }
 396     }
 397 
 398     //Is it allowed to generate events assigned to extra mouse buttons.
 399     //Set to true by default.
 400     private static boolean areExtraMouseButtonsEnabled = true;
 401 
 402     public boolean areExtraMouseButtonsEnabled() throws HeadlessException {
 403         return areExtraMouseButtonsEnabled;
 404     }
 405 
 406     public int getNumberOfButtons(){
 407         return BUTTONS;
 408     }
 409 
 410 
 411     @Override
 412     public boolean isTraySupported() {
 413         return true;
 414     }
 415 
 416     @Override
 417     public boolean isAlwaysOnTopSupported() {
 418         return true;
 419     }
 420 
 421     // Intended to be called from the LWCToolkit.m only.
 422     private static void installToolkitThreadNameInJava() {
 423         Thread.currentThread().setName(CThreading.APPKIT_THREAD_NAME);
 424     }
 425 
 426     @Override
 427     public boolean isWindowOpacitySupported() {
 428         return true;
 429     }
 430 
 431     @Override
 432     public boolean isFrameStateSupported(int state) throws HeadlessException {
 433         switch (state) {
 434             case Frame.NORMAL:
 435             case Frame.ICONIFIED:
 436             case Frame.MAXIMIZED_BOTH:
 437                 return true;
 438             default:
 439                 return false;
 440         }
 441     }
 442 
 443     /**
 444      * Determines which modifier key is the appropriate accelerator
 445      * key for menu shortcuts.
 446      * <p>
 447      * Menu shortcuts, which are embodied in the
 448      * <code>MenuShortcut</code> class, are handled by the
 449      * <code>MenuBar</code> class.
 450      * <p>
 451      * By default, this method returns <code>Event.CTRL_MASK</code>.
 452      * Toolkit implementations should override this method if the
 453      * <b>Control</b> key isn't the correct key for accelerators.
 454      * @return    the modifier mask on the <code>Event</code> class
 455      *                 that is used for menu shortcuts on this toolkit.
 456      * @see       java.awt.MenuBar
 457      * @see       java.awt.MenuShortcut
 458      * @since     JDK1.1
 459      */
 460     public int getMenuShortcutKeyMask() {
 461         return Event.META_MASK;
 462     }
 463 
 464     @Override
 465     public Image getImage(final String filename) {
 466         final Image nsImage = checkForNSImage(filename);
 467         if (nsImage != null) return nsImage;
 468 
 469         return super.getImage(filename);
 470     }
 471 
 472     static final String nsImagePrefix = "NSImage://";
 473     protected Image checkForNSImage(final String imageName) {
 474         if (imageName == null) return null;
 475         if (!imageName.startsWith(nsImagePrefix)) return null;
 476         return CImage.getCreator().createImageFromName(imageName.substring(nsImagePrefix.length()));
 477     }
 478 
 479     // Thread-safe Object.equals() called from native
 480     public static boolean doEquals(final Object a, final Object b, Component c) {
 481         if (a == b) return true;
 482 
 483         final boolean[] ret = new boolean[1];
 484 
 485         try {  invokeAndWait(new Runnable() { public void run() { synchronized(ret) {
 486             ret[0] = a.equals(b);
 487         }}}, c); } catch (Exception e) { e.printStackTrace(); }
 488 
 489         synchronized(ret) { return ret[0]; }
 490     }
 491 
 492     // Kicks an event over to the appropriate eventqueue and waits for it to finish
 493     // To avoid deadlocking, we manually run the NSRunLoop while waiting
 494     // Any selector invoked using ThreadUtilities performOnMainThread will be processed in doAWTRunLoop
 495     // The CInvocationEvent will call LWCToolkit.stopAWTRunLoop() when finished, which will stop our manual runloop
 496     public static void invokeAndWait(Runnable event, Component component) throws InterruptedException, InvocationTargetException {
 497         invokeAndWait(event, component, true);
 498     }
 499 
 500     public static <T> T invokeAndWait(final Callable<T> callable, Component component) throws Exception {
 501         final CallableWrapper<T> wrapper = new CallableWrapper<T>(callable);
 502         invokeAndWait(wrapper, component);
 503         return wrapper.getResult();
 504     }
 505 
 506     static final class CallableWrapper<T> implements Runnable {
 507         final Callable<T> callable;
 508         T object;
 509         Exception e;
 510 
 511         public CallableWrapper(final Callable<T> callable) {
 512             this.callable = callable;
 513         }
 514 
 515         public void run() {
 516             try {
 517                 object = callable.call();
 518             } catch (final Exception e) {
 519                 this.e = e;
 520             }
 521         }
 522 
 523         public T getResult() throws Exception {
 524             if (e != null) throw e;
 525             return object;
 526         }
 527     }
 528 
 529     public static void invokeAndWait(Runnable event, Component component, boolean detectDeadlocks) throws InterruptedException, InvocationTargetException {
 530         long mediator = createAWTRunLoopMediator();
 531 
 532         InvocationEvent invocationEvent = new CPeerEvent(event, mediator);
 533 
 534         if (component != null) {
 535             AppContext appContext = SunToolkit.targetToAppContext(component);
 536             SunToolkit.postEvent(appContext, invocationEvent);
 537 
 538             // 3746956 - flush events from PostEventQueue to prevent them from getting stuck and causing a deadlock
 539             sun.awt.SunToolkitSubclass.flushPendingEvents(appContext);
 540         } else {
 541             // This should be the equivalent to EventQueue.invokeAndWait
 542             ((LWCToolkit)Toolkit.getDefaultToolkit()).getSystemEventQueueForInvokeAndWait().postEvent(invocationEvent);
 543         }
 544 
 545         doAWTRunLoop(mediator, true, detectDeadlocks);
 546 
 547         Throwable eventException = invocationEvent.getException();
 548         if (eventException != null) {
 549             if (eventException instanceof UndeclaredThrowableException) {
 550                 eventException = ((UndeclaredThrowableException)eventException).getUndeclaredThrowable();
 551             }
 552             throw new InvocationTargetException(eventException);
 553         }
 554     }
 555 
 556     public static void invokeLater(Runnable event, Component component) throws InvocationTargetException {
 557         final InvocationEvent invocationEvent = new CPeerEvent(event, 0);
 558 
 559         if (component != null) {
 560             final AppContext appContext = SunToolkit.targetToAppContext(component);
 561             SunToolkit.postEvent(appContext, invocationEvent);
 562 
 563             // 3746956 - flush events from PostEventQueue to prevent them from getting stuck and causing a deadlock
 564             sun.awt.SunToolkitSubclass.flushPendingEvents(appContext);
 565         } else {
 566             // This should be the equivalent to EventQueue.invokeAndWait
 567             ((LWCToolkit)Toolkit.getDefaultToolkit()).getSystemEventQueueForInvokeAndWait().postEvent(invocationEvent);
 568         }
 569 
 570         final Throwable eventException = invocationEvent.getException();
 571         if (eventException == null) return;
 572 
 573         if (eventException instanceof UndeclaredThrowableException) {
 574             throw new InvocationTargetException(((UndeclaredThrowableException)eventException).getUndeclaredThrowable());
 575         }
 576         throw new InvocationTargetException(eventException);
 577     }
 578 
 579     // This exists purely to get around permissions issues with getSystemEventQueueImpl
 580     EventQueue getSystemEventQueueForInvokeAndWait() {
 581         return getSystemEventQueueImpl();
 582     }
 583 
 584 
 585 // DnD support
 586 
 587     public DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) throws InvalidDnDOperationException {
 588         DragSourceContextPeer dscp = CDragSourceContextPeer.createDragSourceContextPeer(dge);
 589 
 590         return dscp;
 591     }
 592 
 593     public <T extends DragGestureRecognizer> T createDragGestureRecognizer(Class<T> abstractRecognizerClass, DragSource ds, Component c, int srcActions, DragGestureListener dgl) {
 594         DragGestureRecognizer dgr = null;
 595 
 596         // Create a new mouse drag gesture recognizer if we have a class match:
 597         if (MouseDragGestureRecognizer.class.equals(abstractRecognizerClass))
 598             dgr = new CMouseDragGestureRecognizer(ds, c, srcActions, dgl);
 599 
 600         return (T)dgr;
 601     }
 602 
 603 // InputMethodSupport Method
 604     /**
 605      * Returns the default keyboard locale of the underlying operating system
 606      */
 607     public Locale getDefaultKeyboardLocale() {
 608         Locale locale = CInputMethod.getNativeLocale();
 609 
 610         if (locale == null) {
 611             return super.getDefaultKeyboardLocale();
 612         }
 613 
 614         return locale;
 615     }
 616 
 617     public java.awt.im.spi.InputMethodDescriptor getInputMethodAdapterDescriptor() {
 618         if (sInputMethodDescriptor == null)
 619             sInputMethodDescriptor = new CInputMethodDescriptor();
 620 
 621         return sInputMethodDescriptor;
 622     }
 623 
 624     /**
 625      * Returns a map of visual attributes for thelevel description
 626      * of the given input method highlight, or null if no mapping is found.
 627      * The style field of the input method highlight is ignored. The map
 628      * returned is unmodifiable.
 629      * @param highlight input method highlight
 630      * @return style attribute map, or null
 631      * @since 1.3
 632      */
 633     public Map mapInputMethodHighlight(InputMethodHighlight highlight) {
 634         return CInputMethod.mapInputMethodHighlight(highlight);
 635     }
 636 
 637     /**
 638      * Returns key modifiers used by Swing to set up a focus accelerator key stroke.
 639      */
 640     @Override
 641     public int getFocusAcceleratorKeyMask() {
 642         return InputEvent.CTRL_MASK | InputEvent.ALT_MASK;
 643     }
 644 
 645     /**
 646      * Tests whether specified key modifiers mask can be used to enter a printable
 647      * character.
 648      */
 649     @Override
 650     public boolean isPrintableCharacterModifiersMask(int mods) {
 651         return ((mods & (InputEvent.META_MASK | InputEvent.CTRL_MASK)) == 0);
 652     }
 653 
 654     /**
 655      * Returns whether popup is allowed to be shown above the task bar.
 656      */
 657     @Override
 658     public boolean canPopupOverlapTaskBar() {
 659         return false;
 660     }
 661 
 662     // Extends PeerEvent because we want to pass long an ObjC mediator object and because we want these events to be posted early
 663     // Typically, rather than relying on the notifier to call notifyAll(), we use the mediator to stop the runloop
 664     public static class CPeerEvent extends PeerEvent {
 665         private long _mediator = 0;
 666 
 667         public CPeerEvent(Runnable runnable, long mediator) {
 668             super(Toolkit.getDefaultToolkit(), runnable, null, true, 0);
 669             _mediator = mediator;
 670         }
 671 
 672         public void dispatch() {
 673             try {
 674                 super.dispatch();
 675             } finally {
 676                 if (_mediator != 0) {
 677                     LWCToolkit.stopAWTRunLoop(_mediator);
 678                 }
 679             }
 680         }
 681     }
 682 
 683     // Call through to native methods
 684     public static void doAWTRunLoop(long mediator, boolean awtMode) { doAWTRunLoop(mediator, awtMode, true); }
 685     public static void doAWTRunLoop(long mediator) { doAWTRunLoop(mediator, true); }
 686 
 687     private static Boolean sunAwtDisableCALayers = null;
 688 
 689     /**
 690      * Returns the value of "sun.awt.disableCALayers" property. Default
 691      * value is {@code false}.
 692      */
 693     public synchronized static boolean getSunAwtDisableCALayers() {
 694         if (sunAwtDisableCALayers == null) {
 695             sunAwtDisableCALayers = AccessController.doPrivileged(
 696                 new GetBooleanAction("sun.awt.disableCALayers"));
 697         }
 698         return sunAwtDisableCALayers.booleanValue();
 699     }
 700 
 701 
 702     /*
 703      * Returns true if the application (one of its windows) owns keyboard focus.
 704      */
 705     public native boolean isApplicationActive();
 706 
 707     /************************
 708      * Native methods section
 709      ************************/
 710 
 711     // These are public because they are accessed from WebKitPluginObject in JavaDeploy
 712     // Basic usage:
 713     // createAWTRunLoopMediator. Start client code on another thread. doAWTRunLoop. When client code is finished, stopAWTRunLoop.
 714     public static native long createAWTRunLoopMediator();
 715     public static native void doAWTRunLoop(long mediator, boolean awtMode, boolean detectDeadlocks);
 716     public static native void stopAWTRunLoop(long mediator);
 717 
 718     private native boolean nativeSyncQueue(long timeout);
 719 
 720     @Override
 721     public Clipboard createPlatformClipboard() {
 722         return new CClipboard("System");
 723     }
 724 
 725     @Override
 726     public boolean isModalExclusionTypeSupported(Dialog.ModalExclusionType exclusionType) {
 727         return (exclusionType == null) ||
 728             (exclusionType == Dialog.ModalExclusionType.NO_EXCLUDE) ||
 729             (exclusionType == Dialog.ModalExclusionType.APPLICATION_EXCLUDE) ||
 730             (exclusionType == Dialog.ModalExclusionType.TOOLKIT_EXCLUDE);
 731     }
 732 
 733     @Override
 734     public boolean isModalityTypeSupported(Dialog.ModalityType modalityType) {
 735         //TODO: FileDialog blocks excluded windows...
 736         //TODO: Test: 2 file dialogs, separate AppContexts: a) Dialog 1 blocked, shouldn't be. Frame 4 blocked (shouldn't be).
 737         return (modalityType == null) ||
 738             (modalityType == Dialog.ModalityType.MODELESS) ||
 739             (modalityType == Dialog.ModalityType.DOCUMENT_MODAL) ||
 740             (modalityType == Dialog.ModalityType.APPLICATION_MODAL) ||
 741             (modalityType == Dialog.ModalityType.TOOLKIT_MODAL);
 742     }
 743 
 744     @Override
 745     public boolean isWindowShapingSupported() {
 746         return true;
 747     }
 748 
 749     @Override
 750     public boolean isWindowTranslucencySupported() {
 751         return true;
 752     }
 753 
 754     @Override
 755     public boolean isTranslucencyCapable(GraphicsConfiguration gc) {
 756         return true;
 757     }
 758 
 759     public boolean isSwingBackbufferTranslucencySupported() {
 760         return true;
 761     }
 762 
 763     @Override
 764     public boolean enableInputMethodsForTextComponent() {
 765         return true;
 766     }
 767 }