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;
  27 
  28 import java.awt.*;
  29 import java.awt.event.*;
  30 import java.awt.image.BufferedImage;
  31 import java.awt.peer.*;
  32 import java.util.List;
  33 
  34 import javax.swing.*;
  35 
  36 import sun.awt.*;
  37 import sun.java2d.*;
  38 import sun.java2d.loops.Blit;
  39 import sun.java2d.loops.CompositeType;
  40 import sun.util.logging.PlatformLogger;
  41 
  42 public class LWWindowPeer
  43     extends LWContainerPeer<Window, JComponent>
  44     implements WindowPeer, FramePeer, DialogPeer, FullScreenCapable
  45 {
  46     public static enum PeerType {
  47         SIMPLEWINDOW,
  48         FRAME,
  49         DIALOG,
  50         EMBEDDEDFRAME
  51     }
  52 
  53     private static final PlatformLogger focusLog = PlatformLogger.getLogger("sun.lwawt.focus.LWWindowPeer");
  54 
  55     private PlatformWindow platformWindow;
  56 
  57     // Window bounds reported by the native system (as opposed to
  58     // regular bounds inherited from LWComponentPeer which are
  59     // requested by user and may haven't been applied yet because
  60     // of asynchronous requests to the windowing system)
  61     private int sysX;
  62     private int sysY;
  63     private int sysW;
  64     private int sysH;
  65 
  66     private static final int MINIMUM_WIDTH = 1;
  67     private static final int MINIMUM_HEIGHT = 1;
  68 
  69     private Insets insets = new Insets(0, 0, 0, 0);
  70 
  71     private GraphicsDevice graphicsDevice;
  72     private GraphicsConfiguration graphicsConfig;
  73 
  74     private SurfaceData surfaceData;
  75     private final Object surfaceDataLock = new Object();
  76 
  77     private int backBufferCount;
  78     private BufferCapabilities backBufferCaps;
  79 
  80     // The back buffer is used for two purposes:
  81     // 1. To render all the lightweight peers
  82     // 2. To provide user with a BufferStrategy
  83     // Need to check if a single back buffer can be used for both
  84 // TODO: VolatileImage
  85 //    private VolatileImage backBuffer;
  86     private volatile BufferedImage backBuffer;
  87 
  88     private volatile int windowState = Frame.NORMAL;
  89 
  90     // A peer where the last mouse event came to. Used to generate
  91     // MOUSE_ENTERED/EXITED notifications and by cursor manager to
  92     // find the component under cursor
  93     private static volatile LWComponentPeer lastMouseEventPeer = null;
  94 
  95     // Peers where all dragged/released events should come to,
  96     // depending on what mouse button is being dragged according to Cocoa
  97     private static LWComponentPeer mouseDownTarget[] = new LWComponentPeer[3];
  98 
  99     // A bitmask that indicates what mouse buttons produce MOUSE_CLICKED events
 100     // on MOUSE_RELEASE. Click events are only generated if there were no drag
 101     // events between MOUSE_PRESSED and MOUSE_RELEASED for particular button
 102     private static int mouseClickButtons = 0;
 103 
 104     private volatile boolean isOpaque = true;
 105 
 106     private static final Font DEFAULT_FONT = new Font("Lucida Grande", Font.PLAIN, 13);
 107 
 108     private static LWWindowPeer grabbingWindow;
 109 
 110     private volatile boolean skipNextFocusChange;
 111 
 112     /**
 113      * Current modal blocker or null.
 114      *
 115      * Synchronization: peerTreeLock.
 116      */
 117     private LWWindowPeer blocker;
 118 
 119     public LWWindowPeer(Window target, PlatformComponent platformComponent,
 120                         PlatformWindow platformWindow)
 121     {
 122         super(target, platformComponent);
 123         this.platformWindow = platformWindow;
 124 
 125         Window owner = target.getOwner();
 126         LWWindowPeer ownerPeer = (owner != null) ? (LWWindowPeer)owner.getPeer() : null;
 127         PlatformWindow ownerDelegate = (ownerPeer != null) ? ownerPeer.getPlatformWindow() : null;
 128 
 129         // The delegate.initialize() needs a non-null GC on X11.
 130         GraphicsConfiguration gc = getTarget().getGraphicsConfiguration();
 131         synchronized (getStateLock()) {
 132             // graphicsConfig should be updated according to the real window
 133             // bounds when the window is shown, see 4868278
 134             this.graphicsConfig = gc;
 135         }
 136 
 137         if (!target.isFontSet()) {
 138             target.setFont(DEFAULT_FONT);
 139         }
 140 
 141         if (!target.isBackgroundSet()) {
 142             target.setBackground(SystemColor.window);
 143         } else {
 144             // first we check if user provided alpha for background. This is
 145             // similar to what Apple's Java do.
 146             // Since JDK7 we should rely on setOpacity() only.
 147             // this.opacity = c.getAlpha();
 148         }
 149 
 150         if (!target.isForegroundSet()) {
 151             target.setForeground(SystemColor.windowText);
 152             // we should not call setForeground because it will call a repaint
 153             // which the peer may not be ready to do yet.
 154         }
 155 
 156         platformWindow.initialize(target, this, ownerDelegate);
 157     }
 158 
 159     @Override
 160     void initializeImpl() {
 161         super.initializeImpl();
 162         if (getTarget() instanceof Frame) {
 163             setTitle(((Frame) getTarget()).getTitle());
 164             setState(((Frame) getTarget()).getExtendedState());
 165         } else if (getTarget() instanceof Dialog) {
 166             setTitle(((Dialog) getTarget()).getTitle());
 167         }
 168 
 169         setAlwaysOnTop(getTarget().isAlwaysOnTop());
 170         updateMinimumSize();
 171 
 172         final float opacity = getTarget().getOpacity();
 173         if (opacity < 1.0f) {
 174             setOpacity(opacity);
 175         }
 176 
 177         setOpaque(getTarget().isOpaque());
 178 
 179         updateInsets(platformWindow.getInsets());
 180         if (getSurfaceData() == null) {
 181             replaceSurfaceData();
 182         }
 183     }
 184 
 185     // Just a helper method
 186     public PlatformWindow getPlatformWindow() {
 187         return platformWindow;
 188     }
 189 
 190     @Override
 191     protected LWWindowPeer getWindowPeerOrSelf() {
 192         return this;
 193     }
 194 
 195     @Override
 196     protected void initializeContainerPeer() {
 197         // No-op as LWWindowPeer doesn't have any containerPeer
 198     }
 199 
 200     // ---- PEER METHODS ---- //
 201 
 202     @Override
 203     protected void disposeImpl() {
 204         SurfaceData oldData = getSurfaceData();
 205         synchronized (surfaceDataLock){
 206             surfaceData = null;
 207         }
 208         if (oldData != null) {
 209             oldData.invalidate();
 210         }
 211         if (isGrabbing()) {
 212             ungrab();
 213         }
 214         destroyBuffers();
 215         platformWindow.dispose();
 216         super.disposeImpl();
 217     }
 218 
 219     @Override
 220     protected void setVisibleImpl(final boolean visible) {
 221         super.setVisibleImpl(visible);
 222         // TODO: update graphicsConfig, see 4868278
 223         platformWindow.setVisible(visible);
 224         if (isSimpleWindow()) {
 225             LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
 226                 getInstance(getAppContext());
 227 
 228             if (visible) {
 229                 if (!getTarget().isAutoRequestFocus()) {
 230                     return;
 231                 } else {
 232                     requestWindowFocus(CausedFocusEvent.Cause.ACTIVATION);
 233                 }
 234             // Focus the owner in case this window is focused.
 235             } else if (manager.getCurrentFocusedWindow() == getTarget()) {
 236                 // Transfer focus to the owner.
 237                 LWWindowPeer owner = getOwnerFrameDialog(LWWindowPeer.this);
 238                 if (owner != null) {
 239                     owner.requestWindowFocus(CausedFocusEvent.Cause.ACTIVATION);
 240                 }
 241             }
 242         }
 243     }
 244 
 245     @Override
 246     public GraphicsConfiguration getGraphicsConfiguration() {
 247         return graphicsConfig;
 248     }
 249 
 250     @Override
 251     public boolean updateGraphicsData(GraphicsConfiguration gc) {
 252         setGraphicsConfig(gc);
 253         return false;
 254     }
 255 
 256     protected final Graphics getOnscreenGraphics(Color fg, Color bg, Font f) {
 257         if (getSurfaceData() == null) {
 258             return null;
 259         }
 260         if (fg == null) {
 261             fg = SystemColor.windowText;
 262         }
 263         if (bg == null) {
 264             bg = SystemColor.window;
 265         }
 266         if (f == null) {
 267             f = DEFAULT_FONT;
 268         }
 269         return platformWindow.transformGraphics(new SunGraphics2D(getSurfaceData(), fg, bg, f));
 270     }
 271 
 272     @Override
 273     public void createBuffers(int numBuffers, BufferCapabilities caps)
 274         throws AWTException
 275     {
 276         try {
 277             // Assume this method is never called with numBuffers <= 1, as 0 is
 278             // unsupported, and 1 corresponds to a SingleBufferStrategy which
 279             // doesn't depend on the peer. Screen is considered as a separate
 280             // "buffer", that's why numBuffers - 1
 281             assert numBuffers > 1;
 282 
 283             replaceSurfaceData(numBuffers - 1, caps);
 284         } catch (InvalidPipeException z) {
 285             throw new AWTException(z.toString());
 286         }
 287     }
 288 
 289     @Override
 290     public final Image getBackBuffer() {
 291         synchronized (getStateLock()) {
 292             return backBuffer;
 293         }
 294     }
 295 
 296     @Override
 297     public void flip(int x1, int y1, int x2, int y2,
 298                      BufferCapabilities.FlipContents flipAction)
 299     {
 300         platformWindow.flip(x1, y1, x2, y2, flipAction);
 301     }
 302 
 303     @Override
 304     public final void destroyBuffers() {
 305         final Image oldBB = getBackBuffer();
 306         synchronized (getStateLock()) {
 307             backBuffer = null;
 308         }
 309         if (oldBB != null) {
 310             oldBB.flush();
 311         }
 312     }
 313 
 314     @Override
 315     public void setBounds(int x, int y, int w, int h, int op) {
 316         if ((op & SET_CLIENT_SIZE) != 0) {
 317             // SET_CLIENT_SIZE is only applicable to window peers, so handle it here
 318             // instead of pulling 'insets' field up to LWComponentPeer
 319             // no need to add insets since Window's notion of width and height includes insets.
 320             op &= ~SET_CLIENT_SIZE;
 321             op |= SET_SIZE;
 322         }
 323 
 324         if (w < MINIMUM_WIDTH) {
 325             w = MINIMUM_WIDTH;
 326         }
 327         if (h < MINIMUM_HEIGHT) {
 328             h = MINIMUM_HEIGHT;
 329         }
 330 
 331         // Don't post ComponentMoved/Resized and Paint events
 332         // until we've got a notification from the delegate
 333         setBounds(x, y, w, h, op, false, false);
 334         // Get updated bounds, so we don't have to handle 'op' here manually
 335         Rectangle r = getBounds();
 336         platformWindow.setBounds(r.x, r.y, r.width, r.height);
 337     }
 338 
 339     @Override
 340     public Point getLocationOnScreen() {
 341         return platformWindow.getLocationOnScreen();
 342     }
 343 
 344     /**
 345      * Overridden from LWContainerPeer to return the correct insets.
 346      * Insets are queried from the delegate and are kept up to date by
 347      * requiering when needed (i.e. when the window geometry is changed).
 348      */
 349     @Override
 350     public Insets getInsets() {
 351         synchronized (getStateLock()) {
 352             return insets;
 353         }
 354     }
 355 
 356     @Override
 357     public FontMetrics getFontMetrics(Font f) {
 358         // TODO: check for "use platform metrics" settings
 359         return platformWindow.getFontMetrics(f);
 360     }
 361 
 362     @Override
 363     public void toFront() {
 364         platformWindow.toFront();
 365     }
 366 
 367     @Override
 368     public void toBack() {
 369         platformWindow.toBack();
 370     }
 371 
 372     @Override
 373     public void setZOrder(ComponentPeer above) {
 374         throw new RuntimeException("not implemented");
 375     }
 376 
 377     @Override
 378     public void setAlwaysOnTop(boolean value) {
 379         platformWindow.setAlwaysOnTop(value);
 380     }
 381 
 382     @Override
 383     public void updateFocusableWindowState() {
 384         platformWindow.updateFocusableWindowState();
 385     }
 386 
 387     @Override
 388     public void setModalBlocked(Dialog blocker, boolean blocked) {
 389         synchronized (getPeerTreeLock()) {
 390             this.blocker = blocked ? (LWWindowPeer)blocker.getPeer() : null;
 391         }
 392 
 393         platformWindow.setModalBlocked(blocked);
 394     }
 395 
 396     @Override
 397     public void updateMinimumSize() {
 398         Dimension d = null;
 399         if (getTarget().isMinimumSizeSet()) {
 400             d = getTarget().getMinimumSize();
 401         }
 402         if (d == null) {
 403             d = new Dimension(MINIMUM_WIDTH, MINIMUM_HEIGHT);
 404         }
 405         platformWindow.setMinimumSize(d.width, d.height);
 406     }
 407 
 408     @Override
 409     public void updateIconImages() {
 410         getPlatformWindow().updateIconImages();
 411     }
 412 
 413     @Override
 414     public void setOpacity(float opacity) {
 415         getPlatformWindow().setOpacity(opacity);
 416         repaintPeer();
 417     }
 418 
 419     @Override
 420     public final void setOpaque(final boolean isOpaque) {
 421         if (this.isOpaque != isOpaque) {
 422             this.isOpaque = isOpaque;
 423             getPlatformWindow().setOpaque(isOpaque);
 424             replaceSurfaceData();
 425             repaintPeer();
 426         }
 427     }
 428 
 429     public final boolean isOpaque() {
 430         return isOpaque;
 431     }
 432 
 433     @Override
 434     public void updateWindow() {
 435         flushOffscreenGraphics();
 436     }
 437 
 438     @Override
 439     public void repositionSecurityWarning() {
 440         throw new RuntimeException("not implemented");
 441     }
 442 
 443     // ---- FRAME PEER METHODS ---- //
 444 
 445     @Override // FramePeer and DialogPeer
 446     public void setTitle(String title) {
 447         platformWindow.setTitle(title == null ? "" : title);
 448     }
 449 
 450     @Override
 451     public void setMenuBar(MenuBar mb) {
 452          platformWindow.setMenuBar(mb);
 453     }
 454 
 455     @Override // FramePeer and DialogPeer
 456     public void setResizable(boolean resizable) {
 457         platformWindow.setResizable(resizable);
 458     }
 459 
 460     @Override
 461     public void setState(int state) {
 462         platformWindow.setWindowState(state);
 463     }
 464 
 465     @Override
 466     public int getState() {
 467         return windowState;
 468     }
 469 
 470     @Override
 471     public void setMaximizedBounds(Rectangle bounds) {
 472         // TODO: not implemented
 473     }
 474 
 475     @Override
 476     public void setBoundsPrivate(int x, int y, int width, int height) {
 477         setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
 478     }
 479 
 480     @Override
 481     public Rectangle getBoundsPrivate() {
 482         throw new RuntimeException("not implemented");
 483     }
 484 
 485     // ---- DIALOG PEER METHODS ---- //
 486 
 487     @Override
 488     public void blockWindows(List<Window> windows) {
 489         //TODO: LWX will probably need some collectJavaToplevels to speed this up
 490         for (Window w : windows) {
 491             WindowPeer wp = (WindowPeer)w.getPeer();
 492             if (wp != null) {
 493                 wp.setModalBlocked((Dialog)getTarget(), true);
 494             }
 495         }
 496     }
 497 
 498     // ---- PEER NOTIFICATIONS ---- //
 499 
 500     public void notifyIconify(boolean iconify) {
 501         //The toplevel target is Frame and states are applicable to it.
 502         //Otherwise, the target is Window and it don't have state property.
 503         //Hopefully, no such events are posted in the queue so consider the
 504         //target as Frame in all cases.
 505 
 506         // REMIND: should we send it anyway if the state not changed since last
 507         // time?
 508         WindowEvent iconifyEvent = new WindowEvent(getTarget(),
 509                 iconify ? WindowEvent.WINDOW_ICONIFIED
 510                         : WindowEvent.WINDOW_DEICONIFIED);
 511         postEvent(iconifyEvent);
 512 
 513         int newWindowState = iconify ? Frame.ICONIFIED : Frame.NORMAL;
 514         postWindowStateChangedEvent(newWindowState);
 515 
 516         // REMIND: RepaintManager doesn't repaint iconified windows and
 517         // hence ignores any repaint request during deiconification.
 518         // So, we need to repaint window explicitly when it becomes normal.
 519         if (!iconify) {
 520             repaintPeer();
 521         }
 522     }
 523 
 524     public void notifyZoom(boolean isZoomed) {
 525         if (isDisposed()) {
 526             return;
 527         }
 528 
 529         int newWindowState = isZoomed ? Frame.MAXIMIZED_BOTH : Frame.NORMAL;
 530         postWindowStateChangedEvent(newWindowState);
 531     }
 532 
 533     /**
 534      * Called by the delegate when any part of the window should be repainted.
 535      */
 536     public void notifyExpose(final int x, final int y, final int w, final int h) {
 537         if (isDisposed()) {
 538             return;
 539         }
 540 
 541         // TODO: there's a serious problem with Swing here: it handles
 542         // the exposition internally, so SwingPaintEventDispatcher always
 543         // return null from createPaintEvent(). However, we flush the
 544         // back buffer here unconditionally, so some flickering may appear.
 545         // A possible solution is to split postPaintEvent() into two parts,
 546         // and override that part which is only called after if
 547         // createPaintEvent() returned non-null value and flush the buffer
 548         // from the overridden method
 549         flushOnscreenGraphics();
 550         repaintPeer(new Rectangle(x, y, w, h));
 551     }
 552 
 553     /**
 554      * Called by the delegate when this window is moved/resized by user.
 555      * There's no notifyReshape() in LWComponentPeer as the only
 556      * components which could be resized by user are top-level windows.
 557      */
 558     public final void notifyReshape(int x, int y, int w, int h) {
 559         if (isDisposed()) {
 560             return;
 561         }
 562 
 563         boolean moved = false;
 564         boolean resized = false;
 565         synchronized (getStateLock()) {
 566             moved = (x != sysX) || (y != sysY);
 567             resized = (w != sysW) || (h != sysH);
 568             sysX = x;
 569             sysY = y;
 570             sysW = w;
 571             sysH = h;
 572         }
 573 
 574         // Check if anything changed
 575         if (!moved && !resized) {
 576             return;
 577         }
 578         // First, update peer's bounds
 579         setBounds(x, y, w, h, SET_BOUNDS, false, false);
 580 
 581         // Second, update the graphics config and surface data
 582         checkIfOnNewScreen();
 583         if (resized) {
 584             replaceSurfaceData();
 585             flushOnscreenGraphics();
 586         }
 587 
 588         // Third, COMPONENT_MOVED/COMPONENT_RESIZED events
 589         if (moved) {
 590             handleMove(x, y, true);
 591         }
 592         if (resized) {
 593             handleResize(w, h,true);
 594         }
 595     }
 596 
 597     private void clearBackground(final int w, final int h) {
 598         final Graphics g = getOnscreenGraphics(getForeground(), getBackground(),
 599                                                getFont());
 600         if (g != null) {
 601             try {
 602                 g.clearRect(0, 0, w, h);
 603             } finally {
 604                 g.dispose();
 605             }
 606         }
 607     }
 608 
 609     public void notifyUpdateCursor() {
 610         getLWToolkit().getCursorManager().updateCursorLater(this);
 611     }
 612 
 613     public void notifyActivation(boolean activation) {
 614         changeFocusedWindow(activation);
 615     }
 616 
 617     // MouseDown in non-client area
 618     public void notifyNCMouseDown() {
 619         // Ungrab except for a click on a Dialog with the grabbing owner
 620         if (grabbingWindow != null &&
 621             grabbingWindow != getOwnerFrameDialog(this))
 622         {
 623             grabbingWindow.ungrab();
 624         }
 625     }
 626 
 627     // ---- EVENTS ---- //
 628 
 629     /*
 630      * Called by the delegate to dispatch the event to Java. Event
 631      * coordinates are relative to non-client window are, i.e. the top-left
 632      * point of the client area is (insets.top, insets.left).
 633      */
 634     public void dispatchMouseEvent(int id, long when, int button,
 635                                    int x, int y, int screenX, int screenY,
 636                                    int modifiers, int clickCount, boolean popupTrigger,
 637                                    byte[] bdata)
 638     {
 639         // TODO: fill "bdata" member of AWTEvent
 640         Rectangle r = getBounds();
 641         // findPeerAt() expects parent coordinates
 642         LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 643         LWWindowPeer lastWindowPeer =
 644             (lastMouseEventPeer != null) ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
 645         LWWindowPeer curWindowPeer =
 646             (targetPeer != null) ? targetPeer.getWindowPeerOrSelf() : null;
 647 
 648         if (id == MouseEvent.MOUSE_EXITED) {
 649             // Sometimes we may get MOUSE_EXITED after lastMouseEventPeer is switched
 650             // to a peer from another window. So we must first check if this peer is
 651             // the same as lastWindowPeer
 652             if (lastWindowPeer == this) {
 653                 if (isEnabled()) {
 654                     Point lp = lastMouseEventPeer.windowToLocal(x, y,
 655                                                                 lastWindowPeer);
 656                     postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 657                                              MouseEvent.MOUSE_EXITED, when,
 658                                              modifiers, lp.x, lp.y, screenX,
 659                                              screenY, clickCount, popupTrigger,
 660                                              button));
 661                 }
 662                 lastMouseEventPeer = null;
 663             }
 664         } else {
 665             if (targetPeer != lastMouseEventPeer) {
 666 
 667                 if (id != MouseEvent.MOUSE_DRAGGED || lastMouseEventPeer == null) {
 668                     // lastMouseEventPeer may be null if mouse was out of Java windows
 669                     if (lastMouseEventPeer != null && lastMouseEventPeer.isEnabled()) {
 670                         // Sometimes, MOUSE_EXITED is not sent by delegate (or is sent a bit
 671                         // later), in which case lastWindowPeer is another window
 672                         if (lastWindowPeer != this) {
 673                             Point oldp = lastMouseEventPeer.windowToLocal(x, y, lastWindowPeer);
 674                             // Additionally translate from this to lastWindowPeer coordinates
 675                             Rectangle lr = lastWindowPeer.getBounds();
 676                             oldp.x += r.x - lr.x;
 677                             oldp.y += r.y - lr.y;
 678                             postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 679                                                      MouseEvent.MOUSE_EXITED,
 680                                                      when, modifiers,
 681                                                      oldp.x, oldp.y, screenX, screenY,
 682                                                      clickCount, popupTrigger, button));
 683                         } else {
 684                             Point oldp = lastMouseEventPeer.windowToLocal(x, y, this);
 685                             postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 686                                                      MouseEvent.MOUSE_EXITED,
 687                                                      when, modifiers,
 688                                                      oldp.x, oldp.y, screenX, screenY,
 689                                                      clickCount, popupTrigger, button));
 690                         }
 691                     }
 692                     if (targetPeer != null && targetPeer.isEnabled() && id != MouseEvent.MOUSE_ENTERED) {
 693                         Point newp = targetPeer.windowToLocal(x, y, curWindowPeer);
 694                         postEvent(new MouseEvent(targetPeer.getTarget(),
 695                                                  MouseEvent.MOUSE_ENTERED,
 696                                                  when, modifiers,
 697                                                  newp.x, newp.y, screenX, screenY,
 698                                                  clickCount, popupTrigger, button));
 699                     }
 700                 }
 701                 lastMouseEventPeer = targetPeer;
 702             }
 703             // TODO: fill "bdata" member of AWTEvent
 704 
 705             int eventButtonMask = (button > 0)? MouseEvent.getMaskForButton(button) : 0;
 706             int otherButtonsPressed = modifiers & ~eventButtonMask;
 707 
 708             // For pressed/dragged/released events OS X treats other
 709             // mouse buttons as if they were BUTTON2, so we do the same
 710             int targetIdx = (button > 3) ? MouseEvent.BUTTON2 - 1 : button - 1;
 711 
 712             // MOUSE_ENTERED/EXITED are generated for the components strictly under
 713             // mouse even when dragging. That's why we first update lastMouseEventPeer
 714             // based on initial targetPeer value and only then recalculate targetPeer
 715             // for MOUSE_DRAGGED/RELEASED events
 716             if (id == MouseEvent.MOUSE_PRESSED) {
 717 
 718                 // Ungrab only if this window is not an owned window of the grabbing one.
 719                 if (!isGrabbing() && grabbingWindow != null &&
 720                     grabbingWindow != getOwnerFrameDialog(this))
 721                 {
 722                     grabbingWindow.ungrab();
 723                 }
 724                 if (otherButtonsPressed == 0) {
 725                     mouseClickButtons = eventButtonMask;
 726                 } else {
 727                     mouseClickButtons |= eventButtonMask;
 728                 }
 729 
 730                 mouseDownTarget[targetIdx] = targetPeer;
 731             } else if (id == MouseEvent.MOUSE_DRAGGED) {
 732                 // Cocoa dragged event has the information about which mouse
 733                 // button is being dragged. Use it to determine the peer that
 734                 // should receive the dragged event.
 735                 targetPeer = mouseDownTarget[targetIdx];
 736                 mouseClickButtons &= ~modifiers;
 737             } else if (id == MouseEvent.MOUSE_RELEASED) {
 738                 // TODO: currently, mouse released event goes to the same component
 739                 // that received corresponding mouse pressed event. For most cases,
 740                 // it's OK, however, we need to make sure that our behavior is consistent
 741                 // with 1.6 for cases where component in question have been
 742                 // hidden/removed in between of mouse pressed/released events.
 743                 targetPeer = mouseDownTarget[targetIdx];
 744 
 745                 if ((modifiers & eventButtonMask) == 0) {
 746                     mouseDownTarget[targetIdx] = null;
 747                 }
 748 
 749                 // mouseClickButtons is updated below, after MOUSE_CLICK is sent
 750             }
 751 
 752             // check if we receive mouseEvent from outside the window's bounds
 753             // it can be either mouseDragged or mouseReleased
 754             if (curWindowPeer == null) {
 755                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 756                 curWindowPeer = this;
 757             }
 758             if (targetPeer == null) {
 759                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 760                 targetPeer = this;
 761             }
 762 
 763 
 764             Point lp = targetPeer.windowToLocal(x, y, curWindowPeer);
 765             if (targetPeer.isEnabled()) {
 766                 MouseEvent event = new MouseEvent(targetPeer.getTarget(), id,
 767                                                   when, modifiers, lp.x, lp.y,
 768                                                   screenX, screenY, clickCount,
 769                                                   popupTrigger, button);
 770                 postEvent(event);
 771             }
 772 
 773             if (id == MouseEvent.MOUSE_RELEASED) {
 774                 if ((mouseClickButtons & eventButtonMask) != 0
 775                     && targetPeer.isEnabled()) {
 776                     postEvent(new MouseEvent(targetPeer.getTarget(),
 777                                              MouseEvent.MOUSE_CLICKED,
 778                                              when, modifiers,
 779                                              lp.x, lp.y, screenX, screenY,
 780                                              clickCount, popupTrigger, button));
 781                 }
 782                 mouseClickButtons &= ~eventButtonMask;
 783             }
 784         }
 785         notifyUpdateCursor();
 786     }
 787 
 788     public void dispatchMouseWheelEvent(long when, int x, int y, int modifiers,
 789                                         int scrollType, int scrollAmount,
 790                                         int wheelRotation, double preciseWheelRotation,
 791                                         byte[] bdata)
 792     {
 793         // TODO: could we just use the last mouse event target here?
 794         Rectangle r = getBounds();
 795         // findPeerAt() expects parent coordinates
 796         final LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 797         if (targetPeer == null || !targetPeer.isEnabled()) {
 798             return;
 799         }
 800 
 801         Point lp = targetPeer.windowToLocal(x, y, this);
 802         // TODO: fill "bdata" member of AWTEvent
 803         // TODO: screenX/screenY
 804         postEvent(new MouseWheelEvent(targetPeer.getTarget(),
 805                                       MouseEvent.MOUSE_WHEEL,
 806                                       when, modifiers,
 807                                       lp.x, lp.y,
 808                                       0, 0, /* screenX, Y */
 809                                       0 /* clickCount */, false /* popupTrigger */,
 810                                       scrollType, scrollAmount,
 811                                       wheelRotation, preciseWheelRotation));
 812     }
 813 
 814     /*
 815      * Called by the delegate when a key is pressed.
 816      */
 817     public void dispatchKeyEvent(int id, long when, int modifiers,
 818                                  int keyCode, char keyChar, int keyLocation)
 819     {
 820         LWComponentPeer focusOwner =
 821             LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
 822                 getFocusOwner();
 823 
 824         // Null focus owner may receive key event when
 825         // application hides the focused window upon ESC press
 826         // (AWT transfers/clears the focus owner) and pending ESC release
 827         // may come to already hidden window. This check eliminates NPE.
 828         if (focusOwner != null) {
 829             KeyEvent event =
 830                 new KeyEvent(focusOwner.getTarget(), id, when, modifiers,
 831                              keyCode, keyChar, keyLocation);
 832             focusOwner.postEvent(event);
 833         }
 834     }
 835 
 836 
 837     // ---- UTILITY METHODS ---- //
 838 
 839     private void postWindowStateChangedEvent(int newWindowState) {
 840         if (getTarget() instanceof Frame) {
 841             AWTAccessor.getFrameAccessor().setExtendedState(
 842                     (Frame)getTarget(), newWindowState);
 843         }
 844         WindowEvent stateChangedEvent = new WindowEvent(getTarget(),
 845                 WindowEvent.WINDOW_STATE_CHANGED,
 846                 windowState, newWindowState);
 847         postEvent(stateChangedEvent);
 848         windowState = newWindowState;
 849     }
 850 
 851     private static int getGraphicsConfigScreen(GraphicsConfiguration gc) {
 852         // TODO: this method can be implemented in a more
 853         // efficient way by forwarding to the delegate
 854         GraphicsDevice gd = gc.getDevice();
 855         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 856         GraphicsDevice[] gds = ge.getScreenDevices();
 857         for (int i = 0; i < gds.length; i++) {
 858             if (gds[i] == gd) {
 859                 return i;
 860             }
 861         }
 862         // Should never happen if gc is a screen device config
 863         return 0;
 864     }
 865 
 866     /*
 867      * This method is called when window's graphics config is changed from
 868      * the app code (e.g. when the window is made non-opaque) or when
 869      * the window is moved to another screen by user.
 870      *
 871      * Returns true if the graphics config has been changed, false otherwise.
 872      */
 873     private boolean setGraphicsConfig(GraphicsConfiguration gc) {
 874         synchronized (getStateLock()) {
 875             if (graphicsConfig == gc) {
 876                 return false;
 877             }
 878             // If window's graphics config is changed from the app code, the
 879             // config correspond to the same device as before; when the window
 880             // is moved by user, graphicsDevice is updated in checkIfOnNewScreen().
 881             // In either case, there's nothing to do with screenOn here
 882             graphicsConfig = gc;
 883         }
 884         // SurfaceData is replaced later in updateGraphicsData()
 885         return true;
 886     }
 887 
 888     private void checkIfOnNewScreen() {
 889         GraphicsDevice newGraphicsDevice = platformWindow.getGraphicsDevice();
 890         synchronized (getStateLock()) {
 891             if (graphicsDevice == newGraphicsDevice) {
 892                 return;
 893             }
 894             graphicsDevice = newGraphicsDevice;
 895         }
 896 
 897         // TODO: DisplayChangedListener stuff
 898         final GraphicsConfiguration newGC = newGraphicsDevice.getDefaultConfiguration();
 899 
 900         if (!setGraphicsConfig(newGC)) return;
 901 
 902         SunToolkit.executeOnEventHandlerThread(getTarget(), new Runnable() {
 903             public void run() {
 904                 AWTAccessor.getComponentAccessor().setGraphicsConfiguration(getTarget(), newGC);
 905             }
 906         });
 907     }
 908 
 909     /**
 910      * This method returns a back buffer Graphics to render all the
 911      * peers to. After the peer is painted, the back buffer contents
 912      * should be flushed to the screen. All the target painting
 913      * (Component.paint() method) should be done directly to the screen.
 914      */
 915     protected final Graphics getOffscreenGraphics(Color fg, Color bg, Font f) {
 916         final Image bb = getBackBuffer();
 917         if (bb == null) {
 918             return null;
 919         }
 920         if (fg == null) {
 921             fg = SystemColor.windowText;
 922         }
 923         if (bg == null) {
 924             bg = SystemColor.window;
 925         }
 926         if (f == null) {
 927             f = DEFAULT_FONT;
 928         }
 929         final Graphics2D g = (Graphics2D) bb.getGraphics();
 930         if (g != null) {
 931             g.setColor(fg);
 932             g.setBackground(bg);
 933             g.setFont(f);
 934         }
 935         return g;
 936     }
 937 
 938     /*
 939      * May be called by delegate to provide SD to Java2D code.
 940      */
 941     public SurfaceData getSurfaceData() {
 942         synchronized (surfaceDataLock) {
 943             return surfaceData;
 944         }
 945     }
 946 
 947     private void replaceSurfaceData() {
 948         replaceSurfaceData(backBufferCount, backBufferCaps);
 949     }
 950 
 951     private void replaceSurfaceData(int newBackBufferCount,
 952                                                  BufferCapabilities newBackBufferCaps) {
 953         synchronized (surfaceDataLock) {
 954             final SurfaceData oldData = getSurfaceData();
 955             surfaceData = platformWindow.replaceSurfaceData();
 956             // TODO: volatile image
 957     //        VolatileImage oldBB = backBuffer;
 958             BufferedImage oldBB = backBuffer;
 959             backBufferCount = newBackBufferCount;
 960             backBufferCaps = newBackBufferCaps;
 961             final Rectangle size = getSize();
 962             if (getSurfaceData() != null && oldData != getSurfaceData()) {
 963                 clearBackground(size.width, size.height);
 964             }
 965             blitSurfaceData(oldData, getSurfaceData());
 966 
 967             if (oldData != null && oldData != getSurfaceData()) {
 968                 // TODO: drop oldData for D3D/WGL pipelines
 969                 // This can only happen when this peer is being created
 970                 oldData.flush();
 971             }
 972 
 973             // TODO: volatile image
 974     //        backBuffer = (VolatileImage)delegate.createBackBuffer();
 975             backBuffer = (BufferedImage) platformWindow.createBackBuffer();
 976             if (backBuffer != null) {
 977                 Graphics g = backBuffer.getGraphics();
 978                 try {
 979                     Rectangle r = getBounds();
 980                     g.setColor(getBackground());
 981                     if (g instanceof Graphics2D) {
 982                         ((Graphics2D) g).setComposite(AlphaComposite.Src);
 983                     }
 984                     g.fillRect(0, 0, r.width, r.height);
 985                     if (oldBB != null) {
 986                         // Draw the old back buffer to the new one
 987                         g.drawImage(oldBB, 0, 0, null);
 988                         oldBB.flush();
 989                     }
 990                 } finally {
 991                     g.dispose();
 992                 }
 993             }
 994         }
 995     }
 996 
 997     private void blitSurfaceData(final SurfaceData src, final SurfaceData dst) {
 998         //TODO blit. proof-of-concept
 999         if (src != dst && src != null && dst != null
1000             && !(dst instanceof NullSurfaceData)
1001             && !(src instanceof NullSurfaceData)
1002             && src.getSurfaceType().equals(dst.getSurfaceType())) {
1003             final Rectangle size = getSize();
1004             final Blit blit = Blit.locate(src.getSurfaceType(),
1005                                           CompositeType.Src,
1006                                           dst.getSurfaceType());
1007             if (blit != null) {
1008                 blit.Blit(src, dst, ((Graphics2D) getGraphics()).getComposite(),
1009                           getRegion(), 0, 0, 0, 0, size.width, size.height);
1010             }
1011         }
1012     }
1013 
1014     public int getBackBufferCount() {
1015         return backBufferCount;
1016     }
1017 
1018     public BufferCapabilities getBackBufferCaps() {
1019         return backBufferCaps;
1020     }
1021 
1022     /*
1023      * Request the window insets from the delegate and compares it
1024      * with the current one. This method is mostly called by the
1025      * delegate, e.g. when the window state is changed and insets
1026      * should be recalculated.
1027      *
1028      * This method may be called on the toolkit thread.
1029      */
1030     public boolean updateInsets(Insets newInsets) {
1031         boolean changed = false;
1032         synchronized (getStateLock()) {
1033             changed = (insets.equals(newInsets));
1034             insets = newInsets;
1035         }
1036 
1037         if (changed) {
1038             replaceSurfaceData();
1039             repaintPeer();
1040         }
1041 
1042         return changed;
1043     }
1044 
1045     public static LWWindowPeer getWindowUnderCursor() {
1046         return lastMouseEventPeer != null ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
1047     }
1048 
1049     public static LWComponentPeer<?, ?> getPeerUnderCursor() {
1050         return lastMouseEventPeer;
1051     }
1052 
1053     /*
1054      * Requests platform to set native focus on a frame/dialog.
1055      * In case of a simple window, triggers appropriate java focus change.
1056      */
1057     public boolean requestWindowFocus(CausedFocusEvent.Cause cause) {
1058         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1059             focusLog.fine("requesting native focus to " + this);
1060         }
1061 
1062         if (!focusAllowedFor()) {
1063             focusLog.fine("focus is not allowed");
1064             return false;
1065         }
1066 
1067         if (platformWindow.rejectFocusRequest(cause)) {
1068             return false;
1069         }
1070 
1071         Window currentActive = KeyboardFocusManager.
1072             getCurrentKeyboardFocusManager().getActiveWindow();
1073 
1074         // Make the owner active window.
1075         if (isSimpleWindow()) {
1076             LWWindowPeer owner = getOwnerFrameDialog(this);
1077 
1078             // If owner is not natively active, request native
1079             // activation on it w/o sending events up to java.
1080             if (owner != null && !owner.platformWindow.isActive()) {
1081                 if (focusLog.isLoggable(PlatformLogger.FINE)) {
1082                     focusLog.fine("requesting native focus to the owner " + owner);
1083                 }
1084                 LWWindowPeer currentActivePeer = (currentActive != null ?
1085                     (LWWindowPeer)currentActive.getPeer() : null);
1086 
1087                 // Ensure the opposite is natively active and suppress sending events.
1088                 if (currentActivePeer != null && currentActivePeer.platformWindow.isActive()) {
1089                     if (focusLog.isLoggable(PlatformLogger.FINE)) {
1090                         focusLog.fine("the opposite is " + currentActivePeer);
1091                     }
1092                     currentActivePeer.skipNextFocusChange = true;
1093                 }
1094                 owner.skipNextFocusChange = true;
1095 
1096                 owner.platformWindow.requestWindowFocus();
1097             }
1098 
1099             // DKFM will synthesize all the focus/activation events correctly.
1100             changeFocusedWindow(true);
1101             return true;
1102 
1103         // In case the toplevel is active but not focused, change focus directly,
1104         // as requesting native focus on it will not have effect.
1105         } else if (getTarget() == currentActive && !getTarget().hasFocus()) {
1106 
1107             changeFocusedWindow(true);
1108             return true;
1109         }
1110         return platformWindow.requestWindowFocus();
1111     }
1112 
1113     private boolean focusAllowedFor() {
1114         Window window = getTarget();
1115         // TODO: check if modal blocked
1116         return window.isVisible() && window.isEnabled() && isFocusableWindow();
1117     }
1118 
1119     private boolean isFocusableWindow() {
1120         boolean focusable = getTarget().isFocusableWindow();
1121         if (isSimpleWindow()) {
1122             LWWindowPeer ownerPeer = getOwnerFrameDialog(this);
1123             if (ownerPeer == null) {
1124                 return false;
1125             }
1126             return focusable && ownerPeer.getTarget().isFocusableWindow();
1127         }
1128         return focusable;
1129     }
1130 
1131     public boolean isSimpleWindow() {
1132         Window window = getTarget();
1133         return !(window instanceof Dialog || window instanceof Frame);
1134     }
1135 
1136     /*
1137      * Changes focused window on java level.
1138      */
1139     private void changeFocusedWindow(boolean becomesFocused) {
1140         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1141             focusLog.fine((becomesFocused?"gaining":"loosing") + " focus window: " + this);
1142         }
1143         if (skipNextFocusChange) {
1144             focusLog.fine("skipping focus change");
1145             skipNextFocusChange = false;
1146             return;
1147         }
1148         if (!isFocusableWindow() && becomesFocused) {
1149             focusLog.fine("the window is not focusable");
1150             return;
1151         }
1152         if (becomesFocused) {
1153             synchronized (getPeerTreeLock()) {
1154                 if (blocker != null) {
1155                     if (focusLog.isLoggable(PlatformLogger.FINEST)) {
1156                         focusLog.finest("the window is blocked by " + blocker);
1157                     }
1158                     return;
1159                 }
1160             }
1161         }
1162 
1163         LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
1164             getInstance(getAppContext());
1165 
1166         Window oppositeWindow = becomesFocused ? manager.getCurrentFocusedWindow() : null;
1167 
1168         // Note, the method is not called:
1169         // - when the opposite (gaining focus) window is an owned/owner window.
1170         // - for a simple window in any case.
1171         if (!becomesFocused &&
1172             (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
1173         {
1174             focusLog.fine("ungrabbing on " + grabbingWindow);
1175             // ungrab a simple window if its owner looses activation.
1176             grabbingWindow.ungrab();
1177         }
1178 
1179         manager.setFocusedWindow(becomesFocused ? LWWindowPeer.this : null);
1180 
1181         int eventID = becomesFocused ? WindowEvent.WINDOW_GAINED_FOCUS : WindowEvent.WINDOW_LOST_FOCUS;
1182         WindowEvent windowEvent = new WindowEvent(getTarget(), eventID, oppositeWindow);
1183 
1184         // TODO: wrap in SequencedEvent
1185         postEvent(windowEvent);
1186     }
1187 
1188     static LWWindowPeer getOwnerFrameDialog(LWWindowPeer peer) {
1189         Window owner = (peer != null ? peer.getTarget().getOwner() : null);
1190         while (owner != null && !(owner instanceof Frame || owner instanceof Dialog)) {
1191             owner = owner.getOwner();
1192         }
1193         return owner != null ? (LWWindowPeer)owner.getPeer() : null;
1194     }
1195 
1196     /**
1197      * Returns the foremost modal blocker of this window, or null.
1198      */
1199     public LWWindowPeer getBlocker() {
1200         synchronized (getPeerTreeLock()) {
1201             LWWindowPeer blocker = this.blocker;
1202             if (blocker == null) {
1203                 return null;
1204             }
1205             while (blocker.blocker != null) {
1206                 blocker = blocker.blocker;
1207             }
1208             return blocker;
1209         }
1210     }
1211 
1212     public void enterFullScreenMode() {
1213         platformWindow.enterFullScreenMode();
1214     }
1215 
1216     public void exitFullScreenMode() {
1217         platformWindow.exitFullScreenMode();
1218     }
1219 
1220     public long getLayerPtr() {
1221         return getPlatformWindow().getLayerPtr();
1222     }
1223 
1224     void grab() {
1225         if (grabbingWindow != null && !isGrabbing()) {
1226             grabbingWindow.ungrab();
1227         }
1228         grabbingWindow = this;
1229     }
1230 
1231     void ungrab() {
1232         if (isGrabbing()) {
1233             grabbingWindow = null;
1234             postEvent(new UngrabEvent(getTarget()));
1235         }
1236     }
1237 
1238     private boolean isGrabbing() {
1239         return this == grabbingWindow;
1240     }
1241 
1242     @Override
1243     public String toString() {
1244         return super.toString() + " [target is " + getTarget() + "]";
1245     }
1246 }