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 sun.util.logging.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 int screenOn = -1;
  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 cachedFocusableWindow;
 105 
 106     private volatile boolean isOpaque = true;
 107 
 108     private static final Font DEFAULT_FONT = new Font("Lucida Grande", Font.PLAIN, 13);
 109 
 110     private static LWWindowPeer grabbingWindow;
 111 
 112     private volatile boolean skipNextFocusChange;
 113 
 114     /**
 115      * Current modal blocker or null.
 116      *
 117      * Synchronization: peerTreeLock.
 118      */
 119     private LWWindowPeer blocker;
 120 
 121     public LWWindowPeer(Window target, PlatformComponent platformComponent,
 122                         PlatformWindow platformWindow)
 123     {
 124         super(target, platformComponent);
 125         this.platformWindow = platformWindow;
 126 
 127         Window owner = target.getOwner();
 128         LWWindowPeer ownerPeer = (owner != null) ? (LWWindowPeer)owner.getPeer() : null;
 129         PlatformWindow ownerDelegate = (ownerPeer != null) ? ownerPeer.getPlatformWindow() : null;
 130 
 131         // The delegate.initialize() needs a non-null GC on X11.
 132         GraphicsConfiguration gc = getTarget().getGraphicsConfiguration();
 133         synchronized (getStateLock()) {
 134             // graphicsConfig should be updated according to the real window
 135             // bounds when the window is shown, see 4868278
 136             this.graphicsConfig = gc;
 137         }
 138 
 139         if (!target.isFontSet()) {
 140             target.setFont(DEFAULT_FONT);
 141         }
 142 
 143         if (!target.isBackgroundSet()) {
 144             target.setBackground(SystemColor.window);
 145         } else {
 146             // first we check if user provided alpha for background. This is
 147             // similar to what Apple's Java do.
 148             // Since JDK7 we should rely on setOpacity() only.
 149             // this.opacity = c.getAlpha();
 150             // System.out.println("Delegate assigns alpha (we ignore setOpacity()):"
 151             // +this.opacity);
 152         }
 153 
 154         if (!target.isForegroundSet()) {
 155             target.setForeground(SystemColor.windowText);
 156             // we should not call setForeground because it will call a repaint
 157             // which the peer may not be ready to do yet.
 158         }
 159 
 160         platformWindow.initialize(target, this, ownerDelegate);
 161     }
 162 
 163     @Override
 164     public void initialize() {
 165         if (getTarget() instanceof Frame) {
 166             setTitle(((Frame)getTarget()).getTitle());
 167             setState(((Frame)getTarget()).getExtendedState());
 168         } else if (getTarget() instanceof Dialog) {
 169             setTitle(((Dialog)getTarget()).getTitle());
 170         }
 171 
 172         setAlwaysOnTop(getTarget().isAlwaysOnTop());
 173         updateMinimumSize();
 174 
 175         cachedFocusableWindow = getTarget().isFocusableWindow();
 176 
 177         setOpacity(getTarget().getOpacity());
 178         setOpaque(getTarget().isOpaque());
 179 
 180         super.initialize();
 181 
 182         updateInsets(platformWindow.getInsets());
 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     public void setVisible(final boolean visible) {
 221         if (getSurfaceData() == null) {
 222             replaceSurfaceData();
 223         }
 224 
 225         if (isVisible() == visible) {
 226             return;
 227         }
 228         super.setVisible(visible);
 229 
 230         // TODO: update graphicsConfig, see 4868278
 231         // TODO: don't notify the delegate if our visibility is unchanged
 232 
 233         // it is important to call this method on EDT
 234         // to prevent the deadlocks during the painting of the lightweight delegates
 235         //TODO: WHY? This is a native-system related call. Perhaps NOT calling
 236         // the painting procedure right from the setVisible(), but rather relying
 237         // on the native Expose event (or, scheduling the repainting asynchronously)
 238         // is better?
 239         SwingUtilities.invokeLater(new Runnable() {
 240             @Override
 241             public void run() {
 242                 platformWindow.setVisible(visible);
 243                 if (isSimpleWindow()) {
 244                     LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
 245                         getInstance(getAppContext());
 246 
 247                     if (visible) {
 248                         updateFocusableWindowState();
 249                         changeFocusedWindow(true, true);
 250 
 251                     // Focus the owner in case this window is focused.
 252                     } else if (manager.getCurrentFocusedWindow() == getTarget()) {
 253                         LWWindowPeer owner = getOwnerFrameDialog(LWWindowPeer.this);
 254                         if (owner != null) {
 255                             // KFM will do all the rest.
 256                             owner.changeFocusedWindow(true, false);
 257                         }
 258                     }
 259                 }
 260             }
 261         });
 262     }
 263 
 264     @Override
 265     public GraphicsConfiguration getGraphicsConfiguration() {
 266         return graphicsConfig;
 267     }
 268 
 269     @Override
 270     public boolean updateGraphicsData(GraphicsConfiguration gc) {
 271         setGraphicsConfig(gc);
 272         return false;
 273     }
 274 
 275     protected final Graphics getOnscreenGraphics(Color fg, Color bg, Font f) {
 276         if (getSurfaceData() == null) {
 277             return null;
 278         }
 279         if (fg == null) {
 280             fg = SystemColor.windowText;
 281         }
 282         if (bg == null) {
 283             bg = SystemColor.window;
 284         }
 285         if (f == null) {
 286             f = DEFAULT_FONT;
 287         }
 288         return platformWindow.transformGraphics(new SunGraphics2D(getSurfaceData(), fg, bg, f));
 289     }
 290 
 291     @Override
 292     public void createBuffers(int numBuffers, BufferCapabilities caps)
 293         throws AWTException
 294     {
 295         try {
 296             // Assume this method is never called with numBuffers <= 1, as 0 is
 297             // unsupported, and 1 corresponds to a SingleBufferStrategy which
 298             // doesn't depend on the peer. Screen is considered as a separate
 299             // "buffer", that's why numBuffers - 1
 300             assert numBuffers > 1;
 301 
 302             replaceSurfaceData(numBuffers - 1, caps);
 303         } catch (InvalidPipeException z) {
 304             throw new AWTException(z.toString());
 305         }
 306     }
 307 
 308     @Override
 309     public final Image getBackBuffer() {
 310         synchronized (getStateLock()) {
 311             return backBuffer;
 312         }
 313     }
 314 
 315     @Override
 316     public void flip(int x1, int y1, int x2, int y2,
 317                      BufferCapabilities.FlipContents flipAction)
 318     {
 319         //Note: constraints must be applied. see applyConstrain().
 320         platformWindow.flip(x1, y1, x2, y2, flipAction);
 321     }
 322 
 323     @Override
 324     public final void destroyBuffers() {
 325         final Image oldBB = getBackBuffer();
 326         synchronized (getStateLock()) {
 327             backBuffer = null;
 328         }
 329         if (oldBB != null) {
 330             oldBB.flush();
 331         }
 332     }
 333 
 334     @Override
 335     public void setBounds(int x, int y, int w, int h, int op) {
 336         if ((op & SET_CLIENT_SIZE) != 0) {
 337             // SET_CLIENT_SIZE is only applicable to window peers, so handle it here
 338             // instead of pulling 'insets' field up to LWComponentPeer
 339             // no need to add insets since Window's notion of width and height includes insets.
 340             op &= ~SET_CLIENT_SIZE;
 341             op |= SET_SIZE;
 342         }
 343 
 344         if (w < MINIMUM_WIDTH) {
 345             w = MINIMUM_WIDTH;
 346         }
 347         if (h < MINIMUM_HEIGHT) {
 348             h = MINIMUM_HEIGHT;
 349         }
 350 
 351         // Don't post ComponentMoved/Resized and Paint events
 352         // until we've got a notification from the delegate
 353         setBounds(x, y, w, h, op, false, false);
 354         // Get updated bounds, so we don't have to handle 'op' here manually
 355         Rectangle r = getBounds();
 356         platformWindow.setBounds(r.x, r.y, r.width, r.height);
 357     }
 358 
 359     @Override
 360     public Point getLocationOnScreen() {
 361         return platformWindow.getLocationOnScreen();
 362     }
 363 
 364     /**
 365      * Overridden from LWContainerPeer to return the correct insets.
 366      * Insets are queried from the delegate and are kept up to date by
 367      * requiering when needed (i.e. when the window geometry is changed).
 368      */
 369     @Override
 370     public Insets getInsets() {
 371         synchronized (getStateLock()) {
 372             return insets;
 373         }
 374     }
 375 
 376     @Override
 377     public FontMetrics getFontMetrics(Font f) {
 378         // TODO: check for "use platform metrics" settings
 379         return platformWindow.getFontMetrics(f);
 380     }
 381 
 382     @Override
 383     public void toFront() {
 384         platformWindow.toFront();
 385     }
 386 
 387     @Override
 388     public void toBack() {
 389         platformWindow.toBack();
 390     }
 391 
 392     @Override
 393     public void setZOrder(ComponentPeer above) {
 394         throw new RuntimeException("not implemented");
 395     }
 396 
 397     @Override
 398     public void setAlwaysOnTop(boolean value) {
 399         platformWindow.setAlwaysOnTop(value);
 400     }
 401 
 402     @Override
 403     public void updateFocusableWindowState() {
 404         cachedFocusableWindow = getTarget().isFocusableWindow();
 405         platformWindow.updateFocusableWindowState();
 406     }
 407 
 408     @Override
 409     public void setModalBlocked(Dialog blocker, boolean blocked) {
 410         synchronized (getPeerTreeLock()) {
 411             if(blocked && blocker.getPeer() instanceof LWWindowPeer) {
 412                 this.blocker = (LWWindowPeer)blocker.getPeer();
 413             } else {
 414                 this.blocker = null;
 415             }
 416         }
 417     }
 418 
 419     @Override
 420     public void updateMinimumSize() {
 421         Dimension d = null;
 422         if (getTarget().isMinimumSizeSet()) {
 423             d = getTarget().getMinimumSize();
 424         }
 425         if (d == null) {
 426             d = new Dimension(MINIMUM_WIDTH, MINIMUM_HEIGHT);
 427         }
 428         platformWindow.setMinimumSize(d.width, d.height);
 429     }
 430 
 431     @Override
 432     public void updateIconImages() {
 433         getPlatformWindow().updateIconImages();
 434     }
 435 
 436     @Override
 437     public void setOpacity(float opacity) {
 438         getPlatformWindow().setOpacity(opacity);
 439         repaintPeer();
 440     }
 441 
 442     @Override
 443     public final void setOpaque(final boolean isOpaque) {
 444         if (this.isOpaque != isOpaque) {
 445             this.isOpaque = isOpaque;
 446             getPlatformWindow().setOpaque(isOpaque);
 447             replaceSurfaceData();
 448             repaintPeer();
 449         }
 450     }
 451 
 452     public final boolean isOpaque() {
 453         return isOpaque;
 454     }
 455 
 456     @Override
 457     public void updateWindow() {
 458         flushOffscreenGraphics();
 459     }
 460 
 461     @Override
 462     public void repositionSecurityWarning() {
 463         throw new RuntimeException("not implemented");
 464     }
 465 
 466     // ---- FRAME PEER METHODS ---- //
 467 
 468     @Override // FramePeer and DialogPeer
 469     public void setTitle(String title) {
 470         platformWindow.setTitle(title == null ? "" : title);
 471     }
 472 
 473     @Override
 474     public void setMenuBar(MenuBar mb) {
 475          platformWindow.setMenuBar(mb);
 476     }
 477 
 478     @Override // FramePeer and DialogPeer
 479     public void setResizable(boolean resizable) {
 480         platformWindow.setResizable(resizable);
 481     }
 482 
 483     @Override
 484     public void setState(int state) {
 485         platformWindow.setWindowState(state);
 486     }
 487 
 488     @Override
 489     public int getState() {
 490         return windowState;
 491     }
 492 
 493     @Override
 494     public void setMaximizedBounds(Rectangle bounds) {
 495         // TODO: not implemented
 496     }
 497 
 498     @Override
 499     public void setBoundsPrivate(int x, int y, int width, int height) {
 500         setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
 501     }
 502 
 503     @Override
 504     public Rectangle getBoundsPrivate() {
 505         throw new RuntimeException("not implemented");
 506     }
 507 
 508     // ---- DIALOG PEER METHODS ---- //
 509 
 510     @Override
 511     public void blockWindows(List<Window> windows) {
 512         //TODO: LWX will probably need some collectJavaToplevels to speed this up
 513         for (Window w : windows) {
 514             WindowPeer wp = (WindowPeer)w.getPeer();
 515             if (wp != null) {
 516                 wp.setModalBlocked((Dialog)getTarget(), true);
 517             }
 518         }
 519     }
 520 
 521     // ---- PEER NOTIFICATIONS ---- //
 522 
 523     public void notifyIconify(boolean iconify) {
 524         //The toplevel target is Frame and states are applicable to it.
 525         //Otherwise, the target is Window and it don't have state property.
 526         //Hopefully, no such events are posted in the queue so consider the
 527         //target as Frame in all cases.
 528 
 529         // REMIND: should we send it anyway if the state not changed since last
 530         // time?
 531         WindowEvent iconifyEvent = new WindowEvent(getTarget(),
 532                 iconify ? WindowEvent.WINDOW_ICONIFIED
 533                         : WindowEvent.WINDOW_DEICONIFIED);
 534         postEvent(iconifyEvent);
 535 
 536         int newWindowState = iconify ? Frame.ICONIFIED : Frame.NORMAL;
 537         postWindowStateChangedEvent(newWindowState);
 538 
 539         // REMIND: RepaintManager doesn't repaint iconified windows and
 540         // hence ignores any repaint request during deiconification.
 541         // So, we need to repaint window explicitly when it becomes normal.
 542         if (!iconify) {
 543             repaintPeer();
 544         }
 545     }
 546 
 547     public void notifyZoom(boolean isZoomed) {
 548         int newWindowState = isZoomed ? Frame.MAXIMIZED_BOTH : Frame.NORMAL;
 549         postWindowStateChangedEvent(newWindowState);
 550     }
 551 
 552     /**
 553      * Called by the delegate when any part of the window should be repainted.
 554      */
 555     public void notifyExpose(final int x, final int y, final int w, final int h) {
 556         // TODO: there's a serious problem with Swing here: it handles
 557         // the exposition internally, so SwingPaintEventDispatcher always
 558         // return null from createPaintEvent(). However, we flush the
 559         // back buffer here unconditionally, so some flickering may appear.
 560         // A possible solution is to split postPaintEvent() into two parts,
 561         // and override that part which is only called after if
 562         // createPaintEvent() returned non-null value and flush the buffer
 563         // from the overridden method
 564         flushOnscreenGraphics();
 565         repaintPeer(new Rectangle(x, y, w, h));
 566     }
 567 
 568     /**
 569      * Called by the delegate when this window is moved/resized by user.
 570      * There's no notifyReshape() in LWComponentPeer as the only
 571      * components which could be resized by user are top-level windows.
 572      */
 573     public final void notifyReshape(int x, int y, int w, int h) {
 574         boolean moved = false;
 575         boolean resized = false;
 576         synchronized (getStateLock()) {
 577             moved = (x != sysX) || (y != sysY);
 578             resized = (w != sysW) || (h != sysH);
 579             sysX = x;
 580             sysY = y;
 581             sysW = w;
 582             sysH = h;
 583         }
 584 
 585         // Check if anything changed
 586         if (!moved && !resized) {
 587             return;
 588         }
 589         // First, update peer's bounds
 590         setBounds(x, y, w, h, SET_BOUNDS, false, false);
 591 
 592         // Second, update the graphics config and surface data
 593         checkIfOnNewScreen();
 594         if (resized) {
 595             replaceSurfaceData();
 596             flushOnscreenGraphics();
 597         }
 598 
 599         // Third, COMPONENT_MOVED/COMPONENT_RESIZED events
 600         if (moved) {
 601             handleMove(x, y, true);
 602         }
 603         if (resized) {
 604             handleResize(w, h,true);
 605         }
 606     }
 607 
 608     private void clearBackground(final int w, final int h) {
 609         final Graphics g = getOnscreenGraphics(getForeground(), getBackground(),
 610                                                getFont());
 611         if (g != null) {
 612             try {
 613                 g.clearRect(0, 0, w, h);
 614             } finally {
 615                 g.dispose();
 616             }
 617         }
 618     }
 619 
 620     public void notifyUpdateCursor() {
 621         getLWToolkit().getCursorManager().updateCursorLater(this);
 622     }
 623 
 624     public void notifyActivation(boolean activation) {
 625         changeFocusedWindow(activation, false);
 626     }
 627 
 628     // MouseDown in non-client area
 629     public void notifyNCMouseDown() {
 630         // Ungrab except for a click on a Dialog with the grabbing owner
 631         if (grabbingWindow != null &&
 632             grabbingWindow != getOwnerFrameDialog(this))
 633         {
 634             grabbingWindow.ungrab();
 635         }
 636     }
 637 
 638     // ---- EVENTS ---- //
 639 
 640     /*
 641      * Called by the delegate to dispatch the event to Java. Event
 642      * coordinates are relative to non-client window are, i.e. the top-left
 643      * point of the client area is (insets.top, insets.left).
 644      */
 645     public void dispatchMouseEvent(int id, long when, int button,
 646                                    int x, int y, int screenX, int screenY,
 647                                    int modifiers, int clickCount, boolean popupTrigger,
 648                                    byte[] bdata)
 649     {
 650         // TODO: fill "bdata" member of AWTEvent
 651         Rectangle r = getBounds();
 652         // findPeerAt() expects parent coordinates
 653         LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 654         LWWindowPeer lastWindowPeer =
 655             (lastMouseEventPeer != null) ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
 656         LWWindowPeer curWindowPeer =
 657             (targetPeer != null) ? targetPeer.getWindowPeerOrSelf() : null;
 658 
 659         if (id == MouseEvent.MOUSE_EXITED) {
 660             // Sometimes we may get MOUSE_EXITED after lastMouseEventPeer is switched
 661             // to a peer from another window. So we must first check if this peer is
 662             // the same as lastWindowPeer
 663             if (lastWindowPeer == this) {
 664                 if (isEnabled()) {
 665                     Point lp = lastMouseEventPeer.windowToLocal(x, y,
 666                                                                 lastWindowPeer);
 667                     postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 668                                              MouseEvent.MOUSE_EXITED, when,
 669                                              modifiers, lp.x, lp.y, screenX,
 670                                              screenY, clickCount, popupTrigger,
 671                                              button));
 672                 }
 673                 lastMouseEventPeer = null;
 674             }
 675         } else {
 676             if (targetPeer != lastMouseEventPeer) {
 677                 // lastMouseEventPeer may be null if mouse was out of Java windows
 678                 if (lastMouseEventPeer != null && lastMouseEventPeer.isEnabled()) {
 679                     // Sometimes, MOUSE_EXITED is not sent by delegate (or is sent a bit
 680                     // later), in which case lastWindowPeer is another window
 681                     if (lastWindowPeer != this) {
 682                         Point oldp = lastMouseEventPeer.windowToLocal(x, y, lastWindowPeer);
 683                         // Additionally translate from this to lastWindowPeer coordinates
 684                         Rectangle lr = lastWindowPeer.getBounds();
 685                         oldp.x += r.x - lr.x;
 686                         oldp.y += r.y - lr.y;
 687                         postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 688                                                  MouseEvent.MOUSE_EXITED,
 689                                                  when, modifiers,
 690                                                  oldp.x, oldp.y, screenX, screenY,
 691                                                  clickCount, popupTrigger, button));
 692                     } else {
 693                         Point oldp = lastMouseEventPeer.windowToLocal(x, y, this);
 694                         postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 695                                                  MouseEvent.MOUSE_EXITED,
 696                                                  when, modifiers,
 697                                                  oldp.x, oldp.y, screenX, screenY,
 698                                                  clickCount, popupTrigger, button));
 699                     }
 700                 }
 701                 lastMouseEventPeer = targetPeer;
 702                 if (targetPeer != null && targetPeer.isEnabled() && id != MouseEvent.MOUSE_ENTERED) {
 703                     Point newp = targetPeer.windowToLocal(x, y, curWindowPeer);
 704                     postEvent(new MouseEvent(targetPeer.getTarget(),
 705                                              MouseEvent.MOUSE_ENTERED,
 706                                              when, modifiers,
 707                                              newp.x, newp.y, screenX, screenY,
 708                                              clickCount, popupTrigger, button));
 709                 }
 710             }
 711             // TODO: fill "bdata" member of AWTEvent
 712 
 713             int eventButtonMask = (button > 0)? MouseEvent.getMaskForButton(button) : 0;
 714             int otherButtonsPressed = modifiers & ~eventButtonMask;
 715 
 716             // For pressed/dragged/released events OS X treats other
 717             // mouse buttons as if they were BUTTON2, so we do the same
 718             int targetIdx = (button > 3) ? MouseEvent.BUTTON2 - 1 : button - 1;
 719 
 720             // MOUSE_ENTERED/EXITED are generated for the components strictly under
 721             // mouse even when dragging. That's why we first update lastMouseEventPeer
 722             // based on initial targetPeer value and only then recalculate targetPeer
 723             // for MOUSE_DRAGGED/RELEASED events
 724             if (id == MouseEvent.MOUSE_PRESSED) {
 725 
 726                 // Ungrab only if this window is not an owned window of the grabbing one.
 727                 if (!isGrabbing() && grabbingWindow != null &&
 728                     grabbingWindow != getOwnerFrameDialog(this))
 729                 {
 730                     grabbingWindow.ungrab();
 731                 }
 732                 if (otherButtonsPressed == 0) {
 733                     mouseClickButtons = eventButtonMask;
 734                 } else {
 735                     mouseClickButtons |= eventButtonMask;
 736                 }
 737 
 738                 // The window should be focused on mouse click. If it gets activated by the native platform,
 739                 // this request will be no op. It will take effect when:
 740                 // 1. A simple not focused window is clicked.
 741                 // 2. An active but not focused owner frame/dialog is clicked.
 742                 // The mouse event then will trigger a focus request "in window" to the component, so the window
 743                 // should gain focus before.
 744                 requestWindowFocus(CausedFocusEvent.Cause.MOUSE_EVENT);
 745 
 746                 mouseDownTarget[targetIdx] = targetPeer;
 747             } else if (id == MouseEvent.MOUSE_DRAGGED) {
 748                 // Cocoa dragged event has the information about which mouse
 749                 // button is being dragged. Use it to determine the peer that
 750                 // should receive the dragged event.
 751                 targetPeer = mouseDownTarget[targetIdx];
 752                 mouseClickButtons &= ~modifiers;
 753             } else if (id == MouseEvent.MOUSE_RELEASED) {
 754                 // TODO: currently, mouse released event goes to the same component
 755                 // that received corresponding mouse pressed event. For most cases,
 756                 // it's OK, however, we need to make sure that our behavior is consistent
 757                 // with 1.6 for cases where component in question have been
 758                 // hidden/removed in between of mouse pressed/released events.
 759                 targetPeer = mouseDownTarget[targetIdx];
 760 
 761                 if ((modifiers & eventButtonMask) == 0) {
 762                     mouseDownTarget[targetIdx] = null;
 763                 }
 764 
 765                 // mouseClickButtons is updated below, after MOUSE_CLICK is sent
 766             }
 767 
 768             // check if we receive mouseEvent from outside the window's bounds
 769             // it can be either mouseDragged or mouseReleased
 770             if (curWindowPeer == null) {
 771                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 772                 curWindowPeer = this;
 773             }
 774             if (targetPeer == null) {
 775                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 776                 targetPeer = this;
 777             }
 778 
 779 
 780             Point lp = targetPeer.windowToLocal(x, y, curWindowPeer);
 781             if (targetPeer.isEnabled()) {
 782                 MouseEvent event = new MouseEvent(targetPeer.getTarget(), id,
 783                                                   when, modifiers, lp.x, lp.y,
 784                                                   screenX, screenY, clickCount,
 785                                                   popupTrigger, button);
 786                 postEvent(event);
 787             }
 788 
 789             if (id == MouseEvent.MOUSE_RELEASED) {
 790                 if ((mouseClickButtons & eventButtonMask) != 0
 791                     && targetPeer.isEnabled()) {
 792                     postEvent(new MouseEvent(targetPeer.getTarget(),
 793                                              MouseEvent.MOUSE_CLICKED,
 794                                              when, modifiers,
 795                                              lp.x, lp.y, screenX, screenY,
 796                                              clickCount, popupTrigger, button));
 797                 }
 798                 mouseClickButtons &= ~eventButtonMask;
 799             }
 800 
 801             notifyUpdateCursor();
 802         }
 803     }
 804 
 805     public void dispatchMouseWheelEvent(long when, int x, int y, int modifiers,
 806                                         int scrollType, int scrollAmount,
 807                                         int wheelRotation, double preciseWheelRotation,
 808                                         byte[] bdata)
 809     {
 810         // TODO: could we just use the last mouse event target here?
 811         Rectangle r = getBounds();
 812         // findPeerAt() expects parent coordinates
 813         final LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 814         if (targetPeer == null || !targetPeer.isEnabled()) {
 815             return;
 816         }
 817 
 818         Point lp = targetPeer.windowToLocal(x, y, this);
 819         // TODO: fill "bdata" member of AWTEvent
 820         // TODO: screenX/screenY
 821         postEvent(new MouseWheelEvent(targetPeer.getTarget(),
 822                                       MouseEvent.MOUSE_WHEEL,
 823                                       when, modifiers,
 824                                       lp.x, lp.y,
 825                                       0, 0, /* screenX, Y */
 826                                       0 /* clickCount */, false /* popupTrigger */,
 827                                       scrollType, scrollAmount,
 828                                       wheelRotation, preciseWheelRotation));
 829     }
 830 
 831     /*
 832      * Called by the delegate when a key is pressed.
 833      */
 834     public void dispatchKeyEvent(int id, long when, int modifiers,
 835                                  int keyCode, char keyChar, int keyLocation)
 836     {
 837         LWKeyboardFocusManagerPeer kfmPeer = LWKeyboardFocusManagerPeer.getInstance(getAppContext());
 838 
 839         LWComponentPeer focusOwner = kfmPeer.getFocusOwner();
 840         
 841         if (focusOwner == null) {
 842             focusOwner = kfmPeer.getFocusedWindow();
 843             
 844             if (focusOwner == null) {
 845                 focusOwner = this;
 846             }
 847         }        
 848         focusOwner.postEvent(new KeyEvent(focusOwner.getTarget(), id, when, modifiers,
 849                              keyCode, keyChar, keyLocation));
 850     }
 851 
 852 
 853     // ---- UTILITY METHODS ---- //
 854 
 855     private void postWindowStateChangedEvent(int newWindowState) {
 856         if (getTarget() instanceof Frame) {
 857             AWTAccessor.getFrameAccessor().setExtendedState(
 858                     (Frame)getTarget(), newWindowState);
 859         }
 860         WindowEvent stateChangedEvent = new WindowEvent(getTarget(),
 861                 WindowEvent.WINDOW_STATE_CHANGED,
 862                 windowState, newWindowState);
 863         postEvent(stateChangedEvent);
 864         windowState = newWindowState;
 865     }
 866 
 867     private static int getGraphicsConfigScreen(GraphicsConfiguration gc) {
 868         // TODO: this method can be implemented in a more
 869         // efficient way by forwarding to the delegate
 870         GraphicsDevice gd = gc.getDevice();
 871         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 872         GraphicsDevice[] gds = ge.getScreenDevices();
 873         for (int i = 0; i < gds.length; i++) {
 874             if (gds[i] == gd) {
 875                 return i;
 876             }
 877         }
 878         // Should never happen if gc is a screen device config
 879         return 0;
 880     }
 881 
 882     private static GraphicsConfiguration getScreenGraphicsConfig(int screen) {
 883         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 884         GraphicsDevice[] gds = ge.getScreenDevices();
 885         if (screen >= gds.length) {
 886             // This could happen during device addition/removal. Use
 887             // the default screen device in this case
 888             return ge.getDefaultScreenDevice().getDefaultConfiguration();
 889         }
 890         return gds[screen].getDefaultConfiguration();
 891     }
 892 
 893     /*
 894      * This method is called when window's graphics config is changed from
 895      * the app code (e.g. when the window is made non-opaque) or when
 896      * the window is moved to another screen by user.
 897      *
 898      * Returns true if the graphics config has been changed, false otherwise.
 899      */
 900     private boolean setGraphicsConfig(GraphicsConfiguration gc) {
 901         synchronized (getStateLock()) {
 902             if (graphicsConfig == gc) {
 903                 return false;
 904             }
 905             // If window's graphics config is changed from the app code, the
 906             // config correspond to the same device as before; when the window
 907             // is moved by user, screenOn is updated in checkIfOnNewScreen().
 908             // In either case, there's nothing to do with screenOn here
 909             graphicsConfig = gc;
 910         }
 911         // SurfaceData is replaced later in updateGraphicsData()
 912         return true;
 913     }
 914 
 915     private void checkIfOnNewScreen() {
 916         int windowScreen = platformWindow.getScreenImOn();
 917         synchronized (getStateLock()) {
 918             if (windowScreen == screenOn) {
 919                 return;
 920             }
 921             screenOn = windowScreen;
 922         }
 923 
 924         // TODO: DisplayChangedListener stuff
 925         final GraphicsConfiguration newGC = getScreenGraphicsConfig(windowScreen);
 926         if (!setGraphicsConfig(newGC)) return;
 927 
 928         SunToolkit.executeOnEventHandlerThread(getTarget(), new Runnable() {
 929             public void run() {
 930                 AWTAccessor.getComponentAccessor().setGraphicsConfiguration(getTarget(), newGC);
 931             }
 932         });
 933     }
 934 
 935     /**
 936      * This method returns a back buffer Graphics to render all the
 937      * peers to. After the peer is painted, the back buffer contents
 938      * should be flushed to the screen. All the target painting
 939      * (Component.paint() method) should be done directly to the screen.
 940      */
 941     protected final Graphics getOffscreenGraphics(Color fg, Color bg, Font f) {
 942         final Image bb = getBackBuffer();
 943         if (bb == null) {
 944             return null;
 945         }
 946         if (fg == null) {
 947             fg = SystemColor.windowText;
 948         }
 949         if (bg == null) {
 950             bg = SystemColor.window;
 951         }
 952         if (f == null) {
 953             f = DEFAULT_FONT;
 954         }
 955         final Graphics2D g = (Graphics2D) bb.getGraphics();
 956         if (g != null) {
 957             g.setColor(fg);
 958             g.setBackground(bg);
 959             g.setFont(f);
 960         }
 961         return g;
 962     }
 963 
 964     /*
 965      * May be called by delegate to provide SD to Java2D code.
 966      */
 967     public SurfaceData getSurfaceData() {
 968         synchronized (surfaceDataLock) {
 969             return surfaceData;
 970         }
 971     }
 972 
 973     private void replaceSurfaceData() {
 974         replaceSurfaceData(backBufferCount, backBufferCaps);
 975     }
 976 
 977     private void replaceSurfaceData(int newBackBufferCount,
 978                                                  BufferCapabilities newBackBufferCaps) {
 979         synchronized (surfaceDataLock) {
 980             final SurfaceData oldData = getSurfaceData();
 981             surfaceData = platformWindow.replaceSurfaceData();
 982             // TODO: volatile image
 983     //        VolatileImage oldBB = backBuffer;
 984             BufferedImage oldBB = backBuffer;
 985             backBufferCount = newBackBufferCount;
 986             backBufferCaps = newBackBufferCaps;
 987             final Rectangle size = getSize();
 988             if (getSurfaceData() != null && oldData != getSurfaceData()) {
 989                 clearBackground(size.width, size.height);
 990             }
 991             blitSurfaceData(oldData, getSurfaceData());
 992 
 993             if (oldData != null && oldData != getSurfaceData()) {
 994                 // TODO: drop oldData for D3D/WGL pipelines
 995                 // This can only happen when this peer is being created
 996                 oldData.flush();
 997             }
 998 
 999             // TODO: volatile image
1000     //        backBuffer = (VolatileImage)delegate.createBackBuffer();
1001             backBuffer = (BufferedImage) platformWindow.createBackBuffer();
1002             if (backBuffer != null) {
1003                 Graphics g = backBuffer.getGraphics();
1004                 try {
1005                     Rectangle r = getBounds();
1006                     g.setColor(getBackground());
1007                     g.fillRect(0, 0, r.width, r.height);
1008                     if (oldBB != null) {
1009                         // Draw the old back buffer to the new one
1010                         g.drawImage(oldBB, 0, 0, null);
1011                         oldBB.flush();
1012                     }
1013                 } finally {
1014                     g.dispose();
1015                 }
1016             }
1017         }
1018     }
1019 
1020     private void blitSurfaceData(final SurfaceData src, final SurfaceData dst) {
1021         //TODO blit. proof-of-concept
1022         if (src != dst && src != null && dst != null
1023             && !(dst instanceof NullSurfaceData)
1024             && !(src instanceof NullSurfaceData)
1025             && src.getSurfaceType().equals(dst.getSurfaceType())) {
1026             final Rectangle size = getSize();
1027             final Blit blit = Blit.locate(src.getSurfaceType(),
1028                                           CompositeType.Src,
1029                                           dst.getSurfaceType());
1030             if (blit != null) {
1031                 blit.Blit(src, dst, ((Graphics2D) getGraphics()).getComposite(),
1032                           getRegion(), 0, 0, 0, 0, size.width, size.height);
1033             }
1034         }
1035     }
1036 
1037     public int getBackBufferCount() {
1038         return backBufferCount;
1039     }
1040 
1041     public BufferCapabilities getBackBufferCaps() {
1042         return backBufferCaps;
1043     }
1044 
1045     /*
1046      * Request the window insets from the delegate and compares it
1047      * with the current one. This method is mostly called by the
1048      * delegate, e.g. when the window state is changed and insets
1049      * should be recalculated.
1050      *
1051      * This method may be called on the toolkit thread.
1052      */
1053     public boolean updateInsets(Insets newInsets) {
1054         boolean changed = false;
1055         synchronized (getStateLock()) {
1056             changed = (insets.equals(newInsets));
1057             insets = newInsets;
1058         }
1059 
1060         if (changed) {
1061             replaceSurfaceData();
1062             repaintPeer();
1063         }
1064 
1065         return changed;
1066     }
1067 
1068     public static LWWindowPeer getWindowUnderCursor() {
1069         return lastMouseEventPeer != null ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
1070     }
1071 
1072     public boolean requestWindowFocus(CausedFocusEvent.Cause cause) {
1073         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1074             focusLog.fine("requesting native focus to " + this);
1075         }
1076 
1077         if (!focusAllowedFor()) {
1078             focusLog.fine("focus is not allowed");
1079             return false;
1080         }
1081 
1082         if (platformWindow.rejectFocusRequest(cause)) {
1083             return false;
1084         }
1085 
1086         Window currentActive = KeyboardFocusManager.
1087             getCurrentKeyboardFocusManager().getActiveWindow();
1088 
1089         // Make the owner active window.
1090         if (isSimpleWindow()) {
1091             LWWindowPeer owner = getOwnerFrameDialog(this);
1092 
1093             // If owner is not natively active, request native
1094             // activation on it w/o sending events up to java.
1095             if (owner != null && !owner.platformWindow.isActive()) {
1096                 if (focusLog.isLoggable(PlatformLogger.FINE)) {
1097                     focusLog.fine("requesting native focus to the owner " + owner);
1098                 }
1099                 LWWindowPeer currentActivePeer = (currentActive != null ?
1100                     (LWWindowPeer)currentActive.getPeer() : null);
1101 
1102                 // Ensure the opposite is natively active and suppress sending events.
1103                 if (currentActivePeer != null && currentActivePeer.platformWindow.isActive()) {
1104                     if (focusLog.isLoggable(PlatformLogger.FINE)) {
1105                         focusLog.fine("the opposite is " + currentActivePeer);
1106                     }
1107                     currentActivePeer.skipNextFocusChange = true;
1108                 }
1109                 owner.skipNextFocusChange = true;
1110 
1111                 owner.platformWindow.requestWindowFocus();
1112             }
1113 
1114             // DKFM will synthesize all the focus/activation events correctly.
1115             changeFocusedWindow(true, false);
1116             return true;
1117 
1118         // In case the toplevel is active but not focused, change focus directly,
1119         // as requesting native focus on it will not have effect.
1120         } else if (getTarget() == currentActive && !getTarget().hasFocus()) {
1121 
1122             changeFocusedWindow(true, false);
1123             return true;
1124         }
1125         return platformWindow.requestWindowFocus();
1126     }
1127 
1128     private boolean focusAllowedFor() {
1129         Window window = getTarget();
1130         // TODO: check if modal blocked
1131         return window.isVisible() && window.isEnabled() && window.isFocusableWindow();
1132     }
1133 
1134     public boolean isSimpleWindow() {
1135         Window window = getTarget();
1136         return !(window instanceof Dialog || window instanceof Frame);
1137     }
1138 
1139     /*
1140      * "Delegates" the responsibility of managing focus to keyboard focus manager.
1141      */
1142     private void changeFocusedWindow(boolean becomesFocused, boolean isShowing) {
1143         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1144             focusLog.fine((becomesFocused?"gaining":"loosing") + " focus window: " + this);
1145         }
1146         if (isShowing && !getTarget().isAutoRequestFocus() || skipNextFocusChange) {
1147             focusLog.fine("skipping focus change");
1148             skipNextFocusChange = false;
1149             return;
1150         }
1151 
1152         if (!cachedFocusableWindow) {
1153             return;
1154         }
1155         if (becomesFocused) {
1156             synchronized (getPeerTreeLock()) {
1157                 if (blocker != null) {
1158                     if (focusLog.isLoggable(PlatformLogger.FINEST)) {
1159                         focusLog.finest("the window is blocked by " + blocker);
1160                     }
1161                     return;
1162                 }
1163             }
1164         }
1165 
1166         LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
1167             getInstance(getAppContext());
1168 
1169         Window oppositeWindow = becomesFocused ? manager.getCurrentFocusedWindow() : null;
1170 
1171         // Note, the method is not called:
1172         // - when the opposite (gaining focus) window is an owned/owner window.
1173         // - for a simple window in any case.
1174         if (!becomesFocused &&
1175             (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
1176         {
1177             focusLog.fine("ungrabbing on " + grabbingWindow);
1178             // ungrab a simple window if its owner looses activation.
1179             grabbingWindow.ungrab();
1180         }
1181 
1182         manager.setFocusedWindow(becomesFocused ? LWWindowPeer.this : null);
1183 
1184         int eventID = becomesFocused ? WindowEvent.WINDOW_GAINED_FOCUS : WindowEvent.WINDOW_LOST_FOCUS;
1185         WindowEvent windowEvent = new TimedWindowEvent(getTarget(), eventID, oppositeWindow, System.currentTimeMillis());
1186 
1187         // TODO: wrap in SequencedEvent
1188         postEvent(windowEvent);
1189     }
1190 
1191     private static LWWindowPeer getOwnerFrameDialog(LWWindowPeer peer) {
1192         Window owner = (peer != null ? peer.getTarget().getOwner() : null);
1193         while (owner != null && !(owner instanceof Frame || owner instanceof Dialog)) {
1194             owner = owner.getOwner();
1195         }
1196         return owner != null ? (LWWindowPeer)owner.getPeer() : null;
1197     }
1198 
1199     /**
1200      * Returns the foremost modal blocker of this window, or null.
1201      */
1202     public LWWindowPeer getBlocker() {
1203         synchronized (getPeerTreeLock()) {
1204             LWWindowPeer blocker = this.blocker;
1205             if (blocker == null) {
1206                 return null;
1207             }
1208             while (blocker.blocker != null) {
1209                 blocker = blocker.blocker;
1210             }
1211             return blocker;
1212         }
1213     }
1214 
1215     public void enterFullScreenMode() {
1216         platformWindow.enterFullScreenMode();
1217     }
1218 
1219     public void exitFullScreenMode() {
1220         platformWindow.exitFullScreenMode();
1221     }
1222 
1223     public long getLayerPtr() {
1224         return getPlatformWindow().getLayerPtr();
1225     }
1226 
1227     void grab() {
1228         if (grabbingWindow != null && !isGrabbing()) {
1229             grabbingWindow.ungrab();
1230         }
1231         grabbingWindow = this;
1232     }
1233 
1234     void ungrab() {
1235         if (isGrabbing()) {
1236             grabbingWindow = null;
1237             postEvent(new UngrabEvent(getTarget()));
1238         }
1239     }
1240 
1241     private boolean isGrabbing() {
1242         return this == grabbingWindow;
1243     }
1244 
1245     @Override
1246     public String toString() {
1247         return super.toString() + " [target is " + getTarget() + "]";
1248     }
1249 }