1 /*
   2  * Copyright (c) 2011, 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     private static final int ButtonsDownMask = InputEvent.BUTTON1_DOWN_MASK |
 100                                                InputEvent.BUTTON2_DOWN_MASK |
 101                                                InputEvent.BUTTON3_DOWN_MASK;
 102 
 103 
 104     // A bitmask that indicates what mouse buttons produce MOUSE_CLICKED events
 105     // on MOUSE_RELEASE. Click events are only generated if there were no drag
 106     // events between MOUSE_PRESSED and MOUSE_RELEASED for particular button
 107     private static int mouseClickButtons = 0;
 108 
 109     private volatile boolean cachedFocusableWindow;
 110 
 111     private volatile boolean isOpaque = true;
 112 
 113     private static final Font DEFAULT_FONT = new Font("Lucida Grande", Font.PLAIN, 13);
 114 
 115     private static LWWindowPeer grabbingWindow;
 116 
 117     private volatile boolean skipNextFocusChange;
 118 
 119     /**
 120      * Current modal blocker or null.
 121      *
 122      * Synchronization: peerTreeLock.
 123      */
 124     private LWWindowPeer blocker;
 125 
 126     public LWWindowPeer(Window target, PlatformComponent platformComponent,
 127                         PlatformWindow platformWindow)
 128     {
 129         super(target, platformComponent);
 130         this.platformWindow = platformWindow;
 131 
 132         Window owner = target.getOwner();
 133         LWWindowPeer ownerPeer = (owner != null) ? (LWWindowPeer)owner.getPeer() : null;
 134         PlatformWindow ownerDelegate = (ownerPeer != null) ? ownerPeer.getPlatformWindow() : null;
 135 
 136         // The delegate.initialize() needs a non-null GC on X11.
 137         GraphicsConfiguration gc = getTarget().getGraphicsConfiguration();
 138         synchronized (getStateLock()) {
 139             // graphicsConfig should be updated according to the real window
 140             // bounds when the window is shown, see 4868278
 141             this.graphicsConfig = gc;
 142         }
 143 
 144         if (!target.isFontSet()) {
 145             target.setFont(DEFAULT_FONT);
 146         }
 147 
 148         if (!target.isBackgroundSet()) {
 149             target.setBackground(SystemColor.window);
 150         } else {
 151             // first we check if user provided alpha for background. This is
 152             // similar to what Apple's Java do.
 153             // Since JDK7 we should rely on setOpacity() only.
 154             // this.opacity = c.getAlpha();
 155             // System.out.println("Delegate assigns alpha (we ignore setOpacity()):"
 156             // +this.opacity);
 157         }
 158 
 159         if (!target.isForegroundSet()) {
 160             target.setForeground(SystemColor.windowText);
 161             // we should not call setForeground because it will call a repaint
 162             // which the peer may not be ready to do yet.
 163         }
 164 
 165         platformWindow.initialize(target, this, ownerDelegate);
 166     }
 167 
 168     @Override
 169     public void initialize() {
 170         super.initialize();
 171 
 172         updateInsets(platformWindow.getInsets());
 173 
 174         if (getTarget() instanceof Frame) {
 175             setTitle(((Frame)getTarget()).getTitle());
 176             setState(((Frame)getTarget()).getExtendedState());
 177         } else if (getTarget() instanceof Dialog) {
 178             setTitle(((Dialog)getTarget()).getTitle());
 179         }
 180 
 181         setAlwaysOnTop(getTarget().isAlwaysOnTop());
 182         updateMinimumSize();
 183 
 184         cachedFocusableWindow = getTarget().isFocusableWindow();
 185 
 186         setOpacity(getTarget().getOpacity());
 187         setOpaque(getTarget().isOpaque());
 188 
 189         // Create surface data and back buffer
 190         replaceSurfaceData(1, null);

 191     }
 192 
 193     // Just a helper method
 194     public PlatformWindow getPlatformWindow() {
 195         return platformWindow;
 196     }
 197 
 198     @Override
 199     protected LWWindowPeer getWindowPeerOrSelf() {
 200         return this;
 201     }
 202 
 203     @Override
 204     protected void initializeContainerPeer() {
 205         // No-op as LWWindowPeer doesn't have any containerPeer
 206     }
 207 
 208     // ---- PEER METHODS ---- //
 209 
 210     @Override
 211     protected void disposeImpl() {
 212         SurfaceData oldData = getSurfaceData();
 213         synchronized (surfaceDataLock){
 214             surfaceData = null;
 215         }
 216         if (oldData != null) {
 217             oldData.invalidate();
 218         }
 219         if (isGrabbing()) {
 220             ungrab();
 221         }
 222         destroyBuffers();
 223         platformWindow.dispose();
 224         super.disposeImpl();
 225     }
 226 
 227     @Override
 228     public void setVisible(final boolean visible) {
 229         if (getSurfaceData() == null) {
 230             replaceSurfaceData();
 231         }
 232 
 233         if (isVisible() == visible) {
 234             return;
 235         }
 236         super.setVisible(visible);
 237 
 238         // TODO: update graphicsConfig, see 4868278
 239         // TODO: don't notify the delegate if our visibility is unchanged
 240 
 241         // it is important to call this method on EDT
 242         // to prevent the deadlocks during the painting of the lightweight delegates
 243         //TODO: WHY? This is a native-system related call. Perhaps NOT calling
 244         // the painting procedure right from the setVisible(), but rather relying
 245         // on the native Expose event (or, scheduling the repainting asynchronously)
 246         // is better?
 247         SwingUtilities.invokeLater(new Runnable() {
 248             @Override
 249             public void run() {
 250                 platformWindow.setVisible(visible);
 251                 if (isSimpleWindow()) {
 252                     LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
 253                         getInstance(getAppContext());
 254 
 255                     if (visible) {
 256                         updateFocusableWindowState();
 257                         changeFocusedWindow(true, true);
 258 
 259                     // Focus the owner in case this window is focused.
 260                     } else if (manager.getCurrentFocusedWindow() == getTarget()) {
 261                         LWWindowPeer owner = getOwnerFrameDialog(LWWindowPeer.this);
 262                         if (owner != null) {
 263                             // KFM will do all the rest.
 264                             owner.changeFocusedWindow(true, false);
 265                         }
 266                     }
 267                 }
 268             }
 269         });
 270     }
 271 
 272     @Override
 273     public GraphicsConfiguration getGraphicsConfiguration() {
 274         return graphicsConfig;
 275     }
 276 
 277     @Override
 278     public boolean updateGraphicsData(GraphicsConfiguration gc) {
 279         setGraphicsConfig(gc);
 280         return false;
 281     }
 282 
 283     protected final Graphics getOnscreenGraphics(Color fg, Color bg, Font f) {
 284         if (getSurfaceData() == null) {
 285             return null;
 286         }
 287         if (fg == null) {
 288             fg = SystemColor.windowText;
 289         }
 290         if (bg == null) {
 291             bg = SystemColor.window;
 292         }
 293         if (f == null) {
 294             f = DEFAULT_FONT;
 295         }
 296         return platformWindow.transformGraphics(new SunGraphics2D(getSurfaceData(), fg, bg, f));
 297     }
 298 
 299     @Override
 300     public void createBuffers(int numBuffers, BufferCapabilities caps)
 301         throws AWTException
 302     {
 303         try {
 304             // Assume this method is never called with numBuffers <= 1, as 0 is
 305             // unsupported, and 1 corresponds to a SingleBufferStrategy which
 306             // doesn't depend on the peer. Screen is considered as a separate
 307             // "buffer", that's why numBuffers - 1
 308             assert numBuffers > 1;
 309 
 310             replaceSurfaceData(numBuffers - 1, caps);
 311         } catch (InvalidPipeException z) {
 312             throw new AWTException(z.toString());
 313         }
 314     }
 315 
 316     @Override
 317     public final Image getBackBuffer() {
 318         synchronized (getStateLock()) {
 319             return backBuffer;
 320         }
 321     }
 322 
 323     @Override
 324     public void flip(int x1, int y1, int x2, int y2,
 325                      BufferCapabilities.FlipContents flipAction)
 326     {
 327         platformWindow.flip(x1, y1, x2, y2, flipAction);
 328     }
 329 
 330     @Override
 331     public final void destroyBuffers() {
 332         final Image oldBB = getBackBuffer();
 333         synchronized (getStateLock()) {
 334             backBuffer = null;
 335         }
 336         if (oldBB != null) {
 337             oldBB.flush();
 338         }
 339     }
 340 
 341     @Override
 342     public void setBounds(int x, int y, int w, int h, int op) {
 343         if ((op & SET_CLIENT_SIZE) != 0) {
 344             // SET_CLIENT_SIZE is only applicable to window peers, so handle it here
 345             // instead of pulling 'insets' field up to LWComponentPeer
 346             // no need to add insets since Window's notion of width and height includes insets.
 347             op &= ~SET_CLIENT_SIZE;
 348             op |= SET_SIZE;
 349         }
 350 
 351         if (w < MINIMUM_WIDTH) {
 352             w = MINIMUM_WIDTH;
 353         }
 354         if (h < MINIMUM_HEIGHT) {
 355             h = MINIMUM_HEIGHT;
 356         }
 357 
 358         // Don't post ComponentMoved/Resized and Paint events
 359         // until we've got a notification from the delegate
 360         setBounds(x, y, w, h, op, false, false);
 361         // Get updated bounds, so we don't have to handle 'op' here manually
 362         Rectangle r = getBounds();
 363         platformWindow.setBounds(r.x, r.y, r.width, r.height);
 364     }
 365 
 366     @Override
 367     public Point getLocationOnScreen() {
 368         return platformWindow.getLocationOnScreen();
 369     }
 370 
 371     /**
 372      * Overridden from LWContainerPeer to return the correct insets.
 373      * Insets are queried from the delegate and are kept up to date by
 374      * requiering when needed (i.e. when the window geometry is changed).
 375      */
 376     @Override
 377     public Insets getInsets() {
 378         synchronized (getStateLock()) {
 379             return insets;
 380         }
 381     }
 382 
 383     @Override
 384     public FontMetrics getFontMetrics(Font f) {
 385         // TODO: check for "use platform metrics" settings
 386         return platformWindow.getFontMetrics(f);
 387     }
 388 
 389     @Override
 390     public void toFront() {
 391         platformWindow.toFront();
 392     }
 393 
 394     @Override
 395     public void toBack() {
 396         platformWindow.toBack();
 397     }
 398 
 399     @Override
 400     public void setZOrder(ComponentPeer above) {
 401         throw new RuntimeException("not implemented");
 402     }
 403 
 404     @Override
 405     public void setAlwaysOnTop(boolean value) {
 406         platformWindow.setAlwaysOnTop(value);
 407     }
 408 
 409     @Override
 410     public void updateFocusableWindowState() {
 411         cachedFocusableWindow = getTarget().isFocusableWindow();
 412         platformWindow.updateFocusableWindowState();
 413     }
 414 
 415     @Override
 416     public void setModalBlocked(Dialog blocker, boolean blocked) {
 417         synchronized (getPeerTreeLock()) {
 418             this.blocker = blocked ? (LWWindowPeer)blocker.getPeer() : null;
 419         }
 420     }
 421 
 422     @Override
 423     public void updateMinimumSize() {
 424         Dimension d = null;
 425         if (getTarget().isMinimumSizeSet()) {
 426             d = getTarget().getMinimumSize();
 427         }
 428         if (d == null) {
 429             d = new Dimension(MINIMUM_WIDTH, MINIMUM_HEIGHT);
 430         }
 431         platformWindow.setMinimumSize(d.width, d.height);
 432     }
 433 
 434     @Override
 435     public void updateIconImages() {
 436         getPlatformWindow().updateIconImages();
 437     }
 438 
 439     @Override
 440     public void setOpacity(float opacity) {
 441         getPlatformWindow().setOpacity(opacity);

 442     }
 443 
 444     @Override
 445     public void setOpaque(boolean isOpaque) {
 446         if (this.isOpaque != isOpaque) {
 447             this.isOpaque = isOpaque;
 448             getPlatformWindow().setOpaque(isOpaque);
 449             replaceSurfaceData();

 450         }
 451     }
 452 
 453     public boolean isOpaque() {
 454         return isOpaque;
 455     }
 456 
 457     @Override
 458     public void updateWindow() {
 459         flushOffscreenGraphics();
 460     }
 461 
 462     @Override
 463     public void repositionSecurityWarning() {
 464         throw new RuntimeException("not implemented");
 465     }
 466 
 467     // ---- FRAME PEER METHODS ---- //
 468 
 469     @Override // FramePeer and DialogPeer
 470     public void setTitle(String title) {
 471         platformWindow.setTitle(title == null ? "" : title);
 472     }
 473 
 474     @Override
 475     public void setMenuBar(MenuBar mb) {
 476          platformWindow.setMenuBar(mb);
 477     }
 478 
 479     @Override // FramePeer and DialogPeer
 480     public void setResizable(boolean resizable) {
 481         platformWindow.setResizable(resizable);
 482     }
 483 
 484     @Override
 485     public void setState(int state) {
 486         platformWindow.setWindowState(state);
 487     }
 488 
 489     @Override
 490     public int getState() {
 491         return windowState;
 492     }
 493 
 494     @Override
 495     public void setMaximizedBounds(Rectangle bounds) {
 496         // TODO: not implemented
 497     }
 498 
 499     @Override
 500     public void setBoundsPrivate(int x, int y, int width, int height) {
 501         setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
 502     }
 503 
 504     @Override
 505     public Rectangle getBoundsPrivate() {
 506         throw new RuntimeException("not implemented");
 507     }
 508 
 509     // ---- DIALOG PEER METHODS ---- //
 510 
 511     @Override
 512     public void blockWindows(List<Window> windows) {
 513         //TODO: LWX will probably need some collectJavaToplevels to speed this up
 514         for (Window w : windows) {
 515             WindowPeer wp = (WindowPeer)w.getPeer();
 516             if (wp != null) {
 517                 wp.setModalBlocked((Dialog)getTarget(), true);
 518             }
 519         }
 520     }
 521 
 522     // ---- PEER NOTIFICATIONS ---- //
 523 
 524     public void notifyIconify(boolean iconify) {
 525         //The toplevel target is Frame and states are applicable to it.
 526         //Otherwise, the target is Window and it don't have state property.
 527         //Hopefully, no such events are posted in the queue so consider the
 528         //target as Frame in all cases.
 529 
 530         // REMIND: should we send it anyway if the state not changed since last
 531         // time?
 532         WindowEvent iconifyEvent = new WindowEvent(getTarget(),
 533                 iconify ? WindowEvent.WINDOW_ICONIFIED
 534                         : WindowEvent.WINDOW_DEICONIFIED);
 535         postEvent(iconifyEvent);
 536 
 537         int newWindowState = iconify ? Frame.ICONIFIED : Frame.NORMAL;
 538         postWindowStateChangedEvent(newWindowState);
 539 
 540         // REMIND: RepaintManager doesn't repaint iconified windows and
 541         // hence ignores any repaint request during deiconification.
 542         // So, we need to repaint window explicitly when it becomes normal.
 543         if (!iconify) {
 544             repaintPeer();
 545         }
 546     }
 547 
 548     public void notifyZoom(boolean isZoomed) {
 549         int newWindowState = isZoomed ? Frame.MAXIMIZED_BOTH : Frame.NORMAL;
 550         postWindowStateChangedEvent(newWindowState);
 551     }
 552 
 553     /**
 554      * Called by the delegate when any part of the window should be repainted.
 555      */
 556     public void notifyExpose(final int x, final int y, final int w, final int h) {
 557         // TODO: there's a serious problem with Swing here: it handles
 558         // the exposition internally, so SwingPaintEventDispatcher always
 559         // return null from createPaintEvent(). However, we flush the
 560         // back buffer here unconditionally, so some flickering may appear.
 561         // A possible solution is to split postPaintEvent() into two parts,
 562         // and override that part which is only called after if
 563         // createPaintEvent() returned non-null value and flush the buffer
 564         // from the overridden method
 565         flushOnscreenGraphics();
 566         repaintPeer(new Rectangle(x, y, w, h));
 567     }
 568 
 569     /**
 570      * Called by the delegate when this window is moved/resized by user.
 571      * There's no notifyReshape() in LWComponentPeer as the only
 572      * components which could be resized by user are top-level windows.
 573      */
 574     public final void notifyReshape(int x, int y, int w, int h) {
 575         boolean moved = false;
 576         boolean resized = false;
 577         synchronized (getStateLock()) {
 578             moved = (x != sysX) || (y != sysY);
 579             resized = (w != sysW) || (h != sysH);
 580             sysX = x;
 581             sysY = y;
 582             sysW = w;
 583             sysH = h;
 584         }
 585 
 586         // Check if anything changed
 587         if (!moved && !resized) {
 588             return;
 589         }
 590         // First, update peer's bounds
 591         setBounds(x, y, w, h, SET_BOUNDS, false, false);
 592 
 593         // Second, update the graphics config and surface data
 594         checkIfOnNewScreen();
 595         if (resized) {
 596             replaceSurfaceData();
 597             flushOnscreenGraphics();
 598         }
 599 
 600         // Third, COMPONENT_MOVED/COMPONENT_RESIZED events
 601         if (moved) {
 602             handleMove(x, y, true);
 603         }
 604         if (resized) {
 605             handleResize(w, h,true);
 606         }
 607     }
 608 
 609     private void clearBackground(final int w, final int h) {
 610         final Graphics g = getOnscreenGraphics(getForeground(), getBackground(),
 611                                                getFont());
 612         if (g != null) {
 613             try {
 614                 g.clearRect(0, 0, w, h);
 615             } finally {
 616                 g.dispose();
 617             }
 618         }
 619     }
 620 
 621     public void notifyUpdateCursor() {
 622         getLWToolkit().getCursorManager().updateCursorLater(this);
 623     }
 624 
 625     public void notifyActivation(boolean activation) {
 626         changeFocusedWindow(activation, false);
 627     }
 628 
 629     // MouseDown in non-client area
 630     public void notifyNCMouseDown() {
 631         // Ungrab except for a click on a Dialog with the grabbing owner
 632         if (grabbingWindow != null &&
 633             grabbingWindow != getOwnerFrameDialog(this))
 634         {
 635             grabbingWindow.ungrab();
 636         }
 637     }
 638 
 639     // ---- EVENTS ---- //
 640 
 641     /*
 642      * Called by the delegate to dispatch the event to Java. Event
 643      * coordinates are relative to non-client window are, i.e. the top-left
 644      * point of the client area is (insets.top, insets.left).
 645      */
 646     public void dispatchMouseEvent(int id, long when, int button,
 647                                    int x, int y, int screenX, int screenY,
 648                                    int modifiers, int clickCount, boolean popupTrigger,
 649                                    byte[] bdata)
 650     {
 651         // TODO: fill "bdata" member of AWTEvent
 652         Rectangle r = getBounds();
 653         // findPeerAt() expects parent coordinates
 654         LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 655         LWWindowPeer lastWindowPeer =
 656             (lastMouseEventPeer != null) ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
 657         LWWindowPeer curWindowPeer =
 658             (targetPeer != null) ? targetPeer.getWindowPeerOrSelf() : null;
 659 
 660         if (id == MouseEvent.MOUSE_EXITED) {
 661             // Sometimes we may get MOUSE_EXITED after lastMouseEventPeer is switched
 662             // to a peer from another window. So we must first check if this peer is
 663             // the same as lastWindowPeer
 664             if (lastWindowPeer == this) {
 665                 if (isEnabled()) {
 666                     Point lp = lastMouseEventPeer.windowToLocal(x, y,
 667                                                                 lastWindowPeer);
 668                     postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 669                                              MouseEvent.MOUSE_EXITED, when,
 670                                              modifiers, lp.x, lp.y, screenX,
 671                                              screenY, clickCount, popupTrigger,
 672                                              button));
 673                 }
 674                 lastMouseEventPeer = null;
 675             }
 676         } else {
 677             if (targetPeer != lastMouseEventPeer) {
 678                 // lastMouseEventPeer may be null if mouse was out of Java windows
 679                 if (lastMouseEventPeer != null && lastMouseEventPeer.isEnabled()) {
 680                     // Sometimes, MOUSE_EXITED is not sent by delegate (or is sent a bit
 681                     // later), in which case lastWindowPeer is another window
 682                     if (lastWindowPeer != this) {
 683                         Point oldp = lastMouseEventPeer.windowToLocal(x, y, lastWindowPeer);
 684                         // Additionally translate from this to lastWindowPeer coordinates
 685                         Rectangle lr = lastWindowPeer.getBounds();
 686                         oldp.x += r.x - lr.x;
 687                         oldp.y += r.y - lr.y;
 688                         postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 689                                                  MouseEvent.MOUSE_EXITED,
 690                                                  when, modifiers,
 691                                                  oldp.x, oldp.y, screenX, screenY,
 692                                                  clickCount, popupTrigger, button));
 693                     } else {
 694                         Point oldp = lastMouseEventPeer.windowToLocal(x, y, this);
 695                         postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 696                                                  MouseEvent.MOUSE_EXITED,
 697                                                  when, modifiers,
 698                                                  oldp.x, oldp.y, screenX, screenY,
 699                                                  clickCount, popupTrigger, button));
 700                     }
 701                 }
 702                 lastMouseEventPeer = targetPeer;
 703                 if (targetPeer != null && targetPeer.isEnabled() && id != MouseEvent.MOUSE_ENTERED) {
 704                     Point newp = targetPeer.windowToLocal(x, y, curWindowPeer);
 705                     postEvent(new MouseEvent(targetPeer.getTarget(),
 706                                              MouseEvent.MOUSE_ENTERED,
 707                                              when, modifiers,
 708                                              newp.x, newp.y, screenX, screenY,
 709                                              clickCount, popupTrigger, button));
 710                 }
 711             }
 712             // TODO: fill "bdata" member of AWTEvent
 713 
 714             // For pressed/dragged/released events JDK 1.6 treats other
 715             // mouse buttons as if they were BUTTON2, so we do the same
 716             int eventButtonMask = (button == 0) ? MouseEvent.BUTTON2_DOWN_MASK :
 717                                                   MouseEvent.getMaskForButton(button);
 718             int mouseButtonsPressed = modifiers & ButtonsDownMask;
 719             int otherButtonsPressed = mouseButtonsPressed & ~eventButtonMask;
 720             int targetIdx = (button == 0) ? MouseEvent.BUTTON2 - 1 : button - 1;
 721 
 722             // MOUSE_ENTERED/EXITED are generated for the components strictly under
 723             // mouse even when dragging. That's why we first update lastMouseEventPeer
 724             // based on initial targetPeer value and only then recalculate targetPeer
 725             // for MOUSE_DRAGGED/RELEASED events
 726             if (id == MouseEvent.MOUSE_PRESSED) {
 727 
 728                 // Ungrab only if this window is not an owned window of the grabbing one.
 729                 if (!isGrabbing() && grabbingWindow != null &&
 730                     grabbingWindow != getOwnerFrameDialog(this))
 731                 {
 732                     grabbingWindow.ungrab();
 733                 }
 734                 if (otherButtonsPressed == 0) {
 735                     mouseClickButtons = eventButtonMask;
 736                 } else {
 737                     mouseClickButtons |= eventButtonMask;
 738                 }
 739 
 740                 mouseDownTarget[targetIdx] = targetPeer;
 741             } else if (id == MouseEvent.MOUSE_DRAGGED) {
 742                 // Cocoa dragged event has the information about which mouse
 743                 // button is being dragged. Use it to determine the peer that
 744                 // should receive the dragged event.
 745                 targetPeer = mouseDownTarget[targetIdx];
 746                 mouseClickButtons &= ~mouseButtonsPressed;
 747             } else if (id == MouseEvent.MOUSE_RELEASED) {
 748                 // TODO: currently, mouse released event goes to the same component
 749                 // that received corresponding mouse pressed event. For most cases,
 750                 // it's OK, however, we need to make sure that our behavior is consistent
 751                 // with 1.6 for cases where component in question have been
 752                 // hidden/removed in between of mouse pressed/released events.
 753                 targetPeer = mouseDownTarget[targetIdx];
 754 
 755                 if ((mouseButtonsPressed & eventButtonMask) == 0) {
 756                     mouseDownTarget[targetIdx] = null;
 757                 }
 758 
 759                 // mouseClickButtons is updated below, after MOUSE_CLICK is sent
 760             }
 761 
 762             // check if we receive mouseEvent from outside the window's bounds
 763             // it can be either mouseDragged or mouseReleased
 764             if (curWindowPeer == null) {
 765                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 766                 curWindowPeer = this;
 767             }
 768             if (targetPeer == null) {
 769                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 770                 targetPeer = this;
 771             }
 772 
 773 
 774             Point lp = targetPeer.windowToLocal(x, y, curWindowPeer);
 775             if (targetPeer.isEnabled()) {
 776                 MouseEvent event = new MouseEvent(targetPeer.getTarget(), id,
 777                                                   when, modifiers, lp.x, lp.y,
 778                                                   screenX, screenY, clickCount,
 779                                                   popupTrigger, button);
 780                 postEvent(event);
 781             }
 782 
 783             if (id == MouseEvent.MOUSE_RELEASED) {
 784                 if ((mouseClickButtons & eventButtonMask) != 0
 785                     && targetPeer.isEnabled()) {
 786                     postEvent(new MouseEvent(targetPeer.getTarget(),
 787                                              MouseEvent.MOUSE_CLICKED,
 788                                              when, modifiers,
 789                                              lp.x, lp.y, screenX, screenY,
 790                                              clickCount, popupTrigger, button));
 791                 }
 792                 mouseClickButtons &= ~eventButtonMask;
 793             }
 794 
 795             notifyUpdateCursor();
 796         }
 797     }
 798 
 799     public void dispatchMouseWheelEvent(long when, int x, int y, int modifiers,
 800                                         int scrollType, int scrollAmount,
 801                                         int wheelRotation, double preciseWheelRotation,
 802                                         byte[] bdata)
 803     {
 804         // TODO: could we just use the last mouse event target here?
 805         Rectangle r = getBounds();
 806         // findPeerAt() expects parent coordinates
 807         final LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 808         if (targetPeer == null || !targetPeer.isEnabled()) {
 809             return;
 810         }
 811 
 812         Point lp = targetPeer.windowToLocal(x, y, this);
 813         // TODO: fill "bdata" member of AWTEvent
 814         // TODO: screenX/screenY
 815         postEvent(new MouseWheelEvent(targetPeer.getTarget(),
 816                                       MouseEvent.MOUSE_WHEEL,
 817                                       when, modifiers,
 818                                       lp.x, lp.y,
 819                                       0, 0, /* screenX, Y */
 820                                       0 /* clickCount */, false /* popupTrigger */,
 821                                       scrollType, scrollAmount,
 822                                       wheelRotation, preciseWheelRotation));
 823     }
 824 
 825     /*
 826      * Called by the delegate when a key is pressed.
 827      */
 828     public void dispatchKeyEvent(int id, long when, int modifiers,
 829                                  int keyCode, char keyChar, int keyLocation)
 830     {
 831         LWComponentPeer focusOwner =
 832             LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
 833                 getFocusOwner();
 834 
 835         // Null focus owner may receive key event when
 836         // application hides the focused window upon ESC press
 837         // (AWT transfers/clears the focus owner) and pending ESC release
 838         // may come to already hidden window. This check eliminates NPE.
 839         if (focusOwner != null) {
 840             KeyEvent event =
 841                 new KeyEvent(focusOwner.getTarget(), id, when, modifiers,
 842                              keyCode, keyChar, keyLocation);
 843             focusOwner.postEvent(event);
 844         }
 845     }
 846 
 847 
 848     // ---- UTILITY METHODS ---- //
 849 
 850     private void postWindowStateChangedEvent(int newWindowState) {
 851         if (getTarget() instanceof Frame) {
 852             AWTAccessor.getFrameAccessor().setExtendedState(
 853                     (Frame)getTarget(), newWindowState);
 854         }
 855         WindowEvent stateChangedEvent = new WindowEvent(getTarget(),
 856                 WindowEvent.WINDOW_STATE_CHANGED,
 857                 windowState, newWindowState);
 858         postEvent(stateChangedEvent);
 859         windowState = newWindowState;
 860     }
 861 
 862     private static int getGraphicsConfigScreen(GraphicsConfiguration gc) {
 863         // TODO: this method can be implemented in a more
 864         // efficient way by forwarding to the delegate
 865         GraphicsDevice gd = gc.getDevice();
 866         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 867         GraphicsDevice[] gds = ge.getScreenDevices();
 868         for (int i = 0; i < gds.length; i++) {
 869             if (gds[i] == gd) {
 870                 return i;
 871             }
 872         }
 873         // Should never happen if gc is a screen device config
 874         return 0;
 875     }
 876 
 877     private static GraphicsConfiguration getScreenGraphicsConfig(int screen) {
 878         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 879         GraphicsDevice[] gds = ge.getScreenDevices();
 880         if (screen >= gds.length) {
 881             // This could happen during device addition/removal. Use
 882             // the default screen device in this case
 883             return ge.getDefaultScreenDevice().getDefaultConfiguration();
 884         }
 885         return gds[screen].getDefaultConfiguration();
 886     }
 887 
 888     /*
 889      * This method is called when window's graphics config is changed from
 890      * the app code (e.g. when the window is made non-opaque) or when
 891      * the window is moved to another screen by user.
 892      *
 893      * Returns true if the graphics config has been changed, false otherwise.
 894      */
 895     private boolean setGraphicsConfig(GraphicsConfiguration gc) {
 896         synchronized (getStateLock()) {
 897             if (graphicsConfig == gc) {
 898                 return false;
 899             }
 900             // If window's graphics config is changed from the app code, the
 901             // config correspond to the same device as before; when the window
 902             // is moved by user, screenOn is updated in checkIfOnNewScreen().
 903             // In either case, there's nothing to do with screenOn here
 904             graphicsConfig = gc;
 905         }
 906         // SurfaceData is replaced later in updateGraphicsData()
 907         return true;
 908     }
 909 
 910     private void checkIfOnNewScreen() {
 911         int windowScreen = platformWindow.getScreenImOn();
 912         synchronized (getStateLock()) {
 913             if (windowScreen == screenOn) {
 914                 return;
 915             }
 916             screenOn = windowScreen;
 917         }
 918 
 919         // TODO: DisplayChangedListener stuff
 920         final GraphicsConfiguration newGC = getScreenGraphicsConfig(windowScreen);
 921         if (!setGraphicsConfig(newGC)) return;
 922 
 923         SunToolkit.executeOnEventHandlerThread(getTarget(), new Runnable() {
 924             public void run() {
 925                 AWTAccessor.getComponentAccessor().setGraphicsConfiguration(getTarget(), newGC);
 926             }
 927         });
 928     }
 929 
 930     /**
 931      * This method returns a back buffer Graphics to render all the
 932      * peers to. After the peer is painted, the back buffer contents
 933      * should be flushed to the screen. All the target painting
 934      * (Component.paint() method) should be done directly to the screen.
 935      */
 936     protected final Graphics getOffscreenGraphics(Color fg, Color bg, Font f) {
 937         final Image bb = getBackBuffer();
 938         if (bb == null) {
 939             return null;
 940         }
 941         if (fg == null) {
 942             fg = SystemColor.windowText;
 943         }
 944         if (bg == null) {
 945             bg = SystemColor.window;
 946         }
 947         if (f == null) {
 948             f = DEFAULT_FONT;
 949         }
 950         final Graphics2D g = (Graphics2D) bb.getGraphics();
 951         if (g != null) {
 952             g.setColor(fg);
 953             g.setBackground(bg);
 954             g.setFont(f);
 955         }
 956         return g;
 957     }
 958 
 959     /*
 960      * May be called by delegate to provide SD to Java2D code.
 961      */
 962     public SurfaceData getSurfaceData() {
 963         synchronized (surfaceDataLock) {
 964             return surfaceData;
 965         }
 966     }
 967 
 968     private void replaceSurfaceData() {
 969         replaceSurfaceData(backBufferCount, backBufferCaps);
 970     }
 971 
 972     private void replaceSurfaceData(int newBackBufferCount,
 973                                                  BufferCapabilities newBackBufferCaps) {
 974         synchronized (surfaceDataLock) {
 975             final SurfaceData oldData = getSurfaceData();
 976             surfaceData = platformWindow.replaceSurfaceData();
 977             // TODO: volatile image
 978     //        VolatileImage oldBB = backBuffer;
 979             BufferedImage oldBB = backBuffer;
 980             backBufferCount = newBackBufferCount;
 981             backBufferCaps = newBackBufferCaps;
 982             final Rectangle size = getSize();
 983             if (getSurfaceData() != null && oldData != getSurfaceData()) {
 984                 clearBackground(size.width, size.height);
 985             }
 986             blitSurfaceData(oldData, getSurfaceData());
 987 
 988             if (oldData != null && oldData != getSurfaceData()) {
 989                 // TODO: drop oldData for D3D/WGL pipelines
 990                 // This can only happen when this peer is being created
 991                 oldData.flush();
 992             }
 993 
 994             // TODO: volatile image
 995     //        backBuffer = (VolatileImage)delegate.createBackBuffer();
 996             backBuffer = (BufferedImage) platformWindow.createBackBuffer();
 997             if (backBuffer != null) {
 998                 Graphics g = backBuffer.getGraphics();
 999                 try {
1000                     Rectangle r = getBounds();
1001                     g.setColor(getBackground());
1002                     g.fillRect(0, 0, r.width, r.height);
1003                     if (oldBB != null) {
1004                         // Draw the old back buffer to the new one
1005                         g.drawImage(oldBB, 0, 0, null);
1006                         oldBB.flush();
1007                     }
1008                 } finally {
1009                     g.dispose();
1010                 }
1011             }
1012         }
1013     }
1014 
1015     private void blitSurfaceData(final SurfaceData src, final SurfaceData dst) {
1016         //TODO blit. proof-of-concept
1017         if (src != dst && src != null && dst != null
1018             && !(dst instanceof NullSurfaceData)
1019             && !(src instanceof NullSurfaceData)
1020             && src.getSurfaceType().equals(dst.getSurfaceType())) {
1021             final Rectangle size = getSize();
1022             final Blit blit = Blit.locate(src.getSurfaceType(),
1023                                           CompositeType.Src,
1024                                           dst.getSurfaceType());
1025             if (blit != null) {
1026                 blit.Blit(src, dst, ((Graphics2D) getGraphics()).getComposite(),
1027                           getRegion(), 0, 0, 0, 0, size.width, size.height);
1028             }
1029         }
1030     }
1031 
1032     public int getBackBufferCount() {
1033         return backBufferCount;
1034     }
1035 
1036     public BufferCapabilities getBackBufferCaps() {
1037         return backBufferCaps;
1038     }
1039 
1040     /*
1041      * Request the window insets from the delegate and compares it
1042      * with the current one. This method is mostly called by the
1043      * delegate, e.g. when the window state is changed and insets
1044      * should be recalculated.
1045      *
1046      * This method may be called on the toolkit thread.
1047      */
1048     public boolean updateInsets(Insets newInsets) {
1049         boolean changed = false;
1050         synchronized (getStateLock()) {
1051             changed = (insets.equals(newInsets));
1052             insets = newInsets;
1053         }
1054 
1055         if (changed) {
1056             replaceSurfaceData();

1057         }
1058 
1059         return changed;
1060     }
1061 
1062     public static LWWindowPeer getWindowUnderCursor() {
1063         return lastMouseEventPeer != null ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
1064     }
1065 
1066     public boolean requestWindowFocus(CausedFocusEvent.Cause cause) {
1067         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1068             focusLog.fine("requesting native focus to " + this);
1069         }
1070 
1071         if (!focusAllowedFor()) {
1072             focusLog.fine("focus is not allowed");
1073             return false;
1074         }
1075 
1076         // Cross-app activation requests are not allowed.
1077         if (cause != CausedFocusEvent.Cause.MOUSE_EVENT &&
1078             !((LWToolkit)Toolkit.getDefaultToolkit()).isApplicationActive())
1079         {
1080             focusLog.fine("the app is inactive, so the request is rejected");
1081             return false;
1082         }
1083 
1084         Window currentActive = KeyboardFocusManager.
1085             getCurrentKeyboardFocusManager().getActiveWindow();
1086 
1087         // Make the owner active window.
1088         if (isSimpleWindow()) {
1089             LWWindowPeer owner = getOwnerFrameDialog(this);
1090 
1091             // If owner is not natively active, request native
1092             // activation on it w/o sending events up to java.
1093             if (owner != null && !owner.platformWindow.isActive()) {
1094                 if (focusLog.isLoggable(PlatformLogger.FINE)) {
1095                     focusLog.fine("requesting native focus to the owner " + owner);
1096                 }
1097                 LWWindowPeer currentActivePeer = (currentActive != null ?
1098                     (LWWindowPeer)currentActive.getPeer() : null);
1099 
1100                 // Ensure the opposite is natively active and suppress sending events.
1101                 if (currentActivePeer != null && currentActivePeer.platformWindow.isActive()) {
1102                     if (focusLog.isLoggable(PlatformLogger.FINE)) {
1103                         focusLog.fine("the opposite is " + currentActivePeer);
1104                     }
1105                     currentActivePeer.skipNextFocusChange = true;
1106                 }
1107                 owner.skipNextFocusChange = true;
1108 
1109                 owner.platformWindow.requestWindowFocus();
1110             }
1111 
1112             // DKFM will synthesize all the focus/activation events correctly.
1113             changeFocusedWindow(true, false);
1114             return true;
1115 
1116         // In case the toplevel is active but not focused, change focus directly,
1117         // as requesting native focus on it will not have effect.
1118         } else if (getTarget() == currentActive && !getTarget().hasFocus()) {
1119 
1120             changeFocusedWindow(true, false);
1121             return true;
1122         }
1123         return platformWindow.requestWindowFocus();
1124     }
1125 
1126     private boolean focusAllowedFor() {
1127         Window window = getTarget();
1128         // TODO: check if modal blocked
1129         return window.isVisible() && window.isEnabled() && window.isFocusableWindow();
1130     }
1131 
1132     public boolean isSimpleWindow() {
1133         Window window = getTarget();
1134         return !(window instanceof Dialog || window instanceof Frame);
1135     }
1136 
1137     /*
1138      * "Delegates" the responsibility of managing focus to keyboard focus manager.
1139      */
1140     private void changeFocusedWindow(boolean becomesFocused, boolean isShowing) {
1141         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1142             focusLog.fine((becomesFocused?"gaining":"loosing") + " focus window: " + this);
1143         }
1144         if (isShowing && !getTarget().isAutoRequestFocus() || skipNextFocusChange) {
1145             focusLog.fine("skipping focus change");
1146             skipNextFocusChange = false;
1147             return;
1148         }
1149 
1150         if (!cachedFocusableWindow) {
1151             return;
1152         }
1153         if (becomesFocused) {
1154             synchronized (getPeerTreeLock()) {
1155                 if (blocker != null) {
1156                     if (focusLog.isLoggable(PlatformLogger.FINEST)) {
1157                         focusLog.finest("the window is blocked by " + blocker);
1158                     }
1159                     return;
1160                 }
1161             }
1162         }
1163 
1164         LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
1165             getInstance(getAppContext());
1166 
1167         Window oppositeWindow = becomesFocused ? manager.getCurrentFocusedWindow() : null;
1168 
1169         // Note, the method is not called:
1170         // - when the opposite (gaining focus) window is an owned/owner window.
1171         // - for a simple window in any case.
1172         if (!becomesFocused &&
1173             (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
1174         {
1175             focusLog.fine("ungrabbing on " + grabbingWindow);
1176             // ungrab a simple window if its owner looses activation.
1177             grabbingWindow.ungrab();
1178         }
1179 
1180         manager.setFocusedWindow(becomesFocused ? LWWindowPeer.this : null);
1181 
1182         int eventID = becomesFocused ? WindowEvent.WINDOW_GAINED_FOCUS : WindowEvent.WINDOW_LOST_FOCUS;
1183         WindowEvent windowEvent = new WindowEvent(getTarget(), eventID, oppositeWindow);
1184 
1185         // TODO: wrap in SequencedEvent
1186         postEvent(windowEvent);
1187     }
1188 
1189     private static LWWindowPeer getOwnerFrameDialog(LWWindowPeer peer) {
1190         Window owner = (peer != null ? peer.getTarget().getOwner() : null);
1191         while (owner != null && !(owner instanceof Frame || owner instanceof Dialog)) {
1192             owner = owner.getOwner();
1193         }
1194         return owner != null ? (LWWindowPeer)owner.getPeer() : null;
1195     }
1196 
1197     /**
1198      * Returns the foremost modal blocker of this window, or null.
1199      */
1200     public LWWindowPeer getBlocker() {
1201         synchronized (getPeerTreeLock()) {
1202             LWWindowPeer blocker = this.blocker;
1203             if (blocker == null) {
1204                 return null;
1205             }
1206             while (blocker.blocker != null) {
1207                 blocker = blocker.blocker;
1208             }
1209             return blocker;
1210         }
1211     }
1212 
1213     public void enterFullScreenMode() {
1214         platformWindow.enterFullScreenMode();
1215     }
1216 
1217     public void exitFullScreenMode() {
1218         platformWindow.exitFullScreenMode();
1219     }
1220 
1221     public long getLayerPtr() {
1222         return getPlatformWindow().getLayerPtr();
1223     }
1224 
1225     void grab() {
1226         if (grabbingWindow != null && !isGrabbing()) {
1227             grabbingWindow.ungrab();
1228         }
1229         grabbingWindow = this;
1230     }
1231 
1232     void ungrab() {
1233         if (isGrabbing()) {
1234             grabbingWindow = null;
1235             postEvent(new UngrabEvent(getTarget()));
1236         }
1237     }
1238 
1239     private boolean isGrabbing() {
1240         return this == grabbingWindow;
1241     }
1242 
1243     @Override
1244     public String toString() {
1245         return super.toString() + " [target is " + getTarget() + "]";
1246     }
1247 }
--- EOF ---