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         platformWindow.flip(x1, y1, x2, y2, flipAction);
 320     }
 321 
 322     @Override
 323     public final void destroyBuffers() {
 324         final Image oldBB = getBackBuffer();
 325         synchronized (getStateLock()) {
 326             backBuffer = null;
 327         }
 328         if (oldBB != null) {
 329             oldBB.flush();
 330         }
 331     }
 332 
 333     @Override
 334     public void setBounds(int x, int y, int w, int h, int op) {
 335         if ((op & SET_CLIENT_SIZE) != 0) {
 336             // SET_CLIENT_SIZE is only applicable to window peers, so handle it here
 337             // instead of pulling 'insets' field up to LWComponentPeer
 338             // no need to add insets since Window's notion of width and height includes insets.
 339             op &= ~SET_CLIENT_SIZE;
 340             op |= SET_SIZE;
 341         }
 342 
 343         if (w < MINIMUM_WIDTH) {
 344             w = MINIMUM_WIDTH;
 345         }
 346         if (h < MINIMUM_HEIGHT) {
 347             h = MINIMUM_HEIGHT;
 348         }
 349 
 350         // Don't post ComponentMoved/Resized and Paint events
 351         // until we've got a notification from the delegate
 352         setBounds(x, y, w, h, op, false, false);
 353         // Get updated bounds, so we don't have to handle 'op' here manually
 354         Rectangle r = getBounds();
 355         platformWindow.setBounds(r.x, r.y, r.width, r.height);
 356     }
 357 
 358     @Override
 359     public Point getLocationOnScreen() {
 360         return platformWindow.getLocationOnScreen();
 361     }
 362 
 363     /**
 364      * Overridden from LWContainerPeer to return the correct insets.
 365      * Insets are queried from the delegate and are kept up to date by
 366      * requiering when needed (i.e. when the window geometry is changed).
 367      */
 368     @Override
 369     public Insets getInsets() {
 370         synchronized (getStateLock()) {
 371             return insets;
 372         }
 373     }
 374 
 375     @Override
 376     public FontMetrics getFontMetrics(Font f) {
 377         // TODO: check for "use platform metrics" settings
 378         return platformWindow.getFontMetrics(f);
 379     }
 380 
 381     @Override
 382     public void toFront() {
 383         platformWindow.toFront();
 384     }
 385 
 386     @Override
 387     public void toBack() {
 388         platformWindow.toBack();
 389     }
 390 
 391     @Override
 392     public void setZOrder(ComponentPeer above) {
 393         throw new RuntimeException("not implemented");
 394     }
 395 
 396     @Override
 397     public void setAlwaysOnTop(boolean value) {
 398         platformWindow.setAlwaysOnTop(value);
 399     }
 400 
 401     @Override
 402     public void updateFocusableWindowState() {
 403         cachedFocusableWindow = getTarget().isFocusableWindow();
 404         platformWindow.updateFocusableWindowState();
 405     }
 406 
 407     @Override
 408     public void setModalBlocked(Dialog blocker, boolean blocked) {
 409         synchronized (getPeerTreeLock()) {
 410             this.blocker = blocked ? (LWWindowPeer)blocker.getPeer() : null;
 411         }
 412         
 413         if (blocked) {
 414             platformWindow.modallyBlocked();
 415         } else {
 416             platformWindow.modallyUnblocked();
 417         }
 418     }
 419 
 420     @Override
 421     public void updateMinimumSize() {
 422         Dimension d = null;
 423         if (getTarget().isMinimumSizeSet()) {
 424             d = getTarget().getMinimumSize();
 425         }
 426         if (d == null) {
 427             d = new Dimension(MINIMUM_WIDTH, MINIMUM_HEIGHT);
 428         }
 429         platformWindow.setMinimumSize(d.width, d.height);
 430     }
 431 
 432     @Override
 433     public void updateIconImages() {
 434         getPlatformWindow().updateIconImages();
 435     }
 436 
 437     @Override
 438     public void setOpacity(float opacity) {
 439         getPlatformWindow().setOpacity(opacity);
 440         repaintPeer();
 441     }
 442 
 443     @Override
 444     public final void setOpaque(final boolean isOpaque) {
 445         if (this.isOpaque != isOpaque) {
 446             this.isOpaque = isOpaque;
 447             getPlatformWindow().setOpaque(isOpaque);
 448             replaceSurfaceData();
 449             repaintPeer();
 450         }
 451     }
 452 
 453     public final 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             int eventButtonMask = (button > 0)? MouseEvent.getMaskForButton(button) : 0;
 715             int otherButtonsPressed = modifiers & ~eventButtonMask;
 716 
 717             // For pressed/dragged/released events OS X treats other
 718             // mouse buttons as if they were BUTTON2, so we do the same
 719             int targetIdx = (button > 3) ? MouseEvent.BUTTON2 - 1 : button - 1;
 720 
 721             // MOUSE_ENTERED/EXITED are generated for the components strictly under
 722             // mouse even when dragging. That's why we first update lastMouseEventPeer
 723             // based on initial targetPeer value and only then recalculate targetPeer
 724             // for MOUSE_DRAGGED/RELEASED events
 725             if (id == MouseEvent.MOUSE_PRESSED) {
 726 
 727                 // Ungrab only if this window is not an owned window of the grabbing one.
 728                 if (!isGrabbing() && grabbingWindow != null &&
 729                     grabbingWindow != getOwnerFrameDialog(this))
 730                 {
 731                     grabbingWindow.ungrab();
 732                 }
 733                 if (otherButtonsPressed == 0) {
 734                     mouseClickButtons = eventButtonMask;
 735                 } else {
 736                     mouseClickButtons |= eventButtonMask;
 737                 }
 738 
 739                 mouseDownTarget[targetIdx] = targetPeer;
 740             } else if (id == MouseEvent.MOUSE_DRAGGED) {
 741                 // Cocoa dragged event has the information about which mouse
 742                 // button is being dragged. Use it to determine the peer that
 743                 // should receive the dragged event.
 744                 targetPeer = mouseDownTarget[targetIdx];
 745                 mouseClickButtons &= ~modifiers;
 746             } else if (id == MouseEvent.MOUSE_RELEASED) {
 747                 // TODO: currently, mouse released event goes to the same component
 748                 // that received corresponding mouse pressed event. For most cases,
 749                 // it's OK, however, we need to make sure that our behavior is consistent
 750                 // with 1.6 for cases where component in question have been
 751                 // hidden/removed in between of mouse pressed/released events.
 752                 targetPeer = mouseDownTarget[targetIdx];
 753 
 754                 if ((modifiers & eventButtonMask) == 0) {
 755                     mouseDownTarget[targetIdx] = null;
 756                 }
 757 
 758                 // mouseClickButtons is updated below, after MOUSE_CLICK is sent
 759             }
 760 
 761             // check if we receive mouseEvent from outside the window's bounds
 762             // it can be either mouseDragged or mouseReleased
 763             if (curWindowPeer == null) {
 764                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 765                 curWindowPeer = this;
 766             }
 767             if (targetPeer == null) {
 768                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 769                 targetPeer = this;
 770             }
 771 
 772 
 773             Point lp = targetPeer.windowToLocal(x, y, curWindowPeer);
 774             if (targetPeer.isEnabled()) {
 775                 MouseEvent event = new MouseEvent(targetPeer.getTarget(), id,
 776                                                   when, modifiers, lp.x, lp.y,
 777                                                   screenX, screenY, clickCount,
 778                                                   popupTrigger, button);
 779                 postEvent(event);
 780             }
 781 
 782             if (id == MouseEvent.MOUSE_RELEASED) {
 783                 if ((mouseClickButtons & eventButtonMask) != 0
 784                     && targetPeer.isEnabled()) {
 785                     postEvent(new MouseEvent(targetPeer.getTarget(),
 786                                              MouseEvent.MOUSE_CLICKED,
 787                                              when, modifiers,
 788                                              lp.x, lp.y, screenX, screenY,
 789                                              clickCount, popupTrigger, button));
 790                 }
 791                 mouseClickButtons &= ~eventButtonMask;
 792             }
 793         }
 794         notifyUpdateCursor();
 795     }
 796 
 797     public void dispatchMouseWheelEvent(long when, int x, int y, int modifiers,
 798                                         int scrollType, int scrollAmount,
 799                                         int wheelRotation, double preciseWheelRotation,
 800                                         byte[] bdata)
 801     {
 802         // TODO: could we just use the last mouse event target here?
 803         Rectangle r = getBounds();
 804         // findPeerAt() expects parent coordinates
 805         final LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 806         if (targetPeer == null || !targetPeer.isEnabled()) {
 807             return;
 808         }
 809 
 810         Point lp = targetPeer.windowToLocal(x, y, this);
 811         // TODO: fill "bdata" member of AWTEvent
 812         // TODO: screenX/screenY
 813         postEvent(new MouseWheelEvent(targetPeer.getTarget(),
 814                                       MouseEvent.MOUSE_WHEEL,
 815                                       when, modifiers,
 816                                       lp.x, lp.y,
 817                                       0, 0, /* screenX, Y */
 818                                       0 /* clickCount */, false /* popupTrigger */,
 819                                       scrollType, scrollAmount,
 820                                       wheelRotation, preciseWheelRotation));
 821     }
 822 
 823     /*
 824      * Called by the delegate when a key is pressed.
 825      */
 826     public void dispatchKeyEvent(int id, long when, int modifiers,
 827                                  int keyCode, char keyChar, int keyLocation)
 828     {
 829         LWComponentPeer focusOwner =
 830             LWKeyboardFocusManagerPeer.getInstance(getAppContext()).
 831                 getFocusOwner();
 832 
 833         // Null focus owner may receive key event when
 834         // application hides the focused window upon ESC press
 835         // (AWT transfers/clears the focus owner) and pending ESC release
 836         // may come to already hidden window. This check eliminates NPE.
 837         if (focusOwner != null) {
 838             KeyEvent event =
 839                 new KeyEvent(focusOwner.getTarget(), id, when, modifiers,
 840                              keyCode, keyChar, keyLocation);
 841             focusOwner.postEvent(event);
 842         }
 843     }
 844 
 845 
 846     // ---- UTILITY METHODS ---- //
 847 
 848     private void postWindowStateChangedEvent(int newWindowState) {
 849         if (getTarget() instanceof Frame) {
 850             AWTAccessor.getFrameAccessor().setExtendedState(
 851                     (Frame)getTarget(), newWindowState);
 852         }
 853         WindowEvent stateChangedEvent = new WindowEvent(getTarget(),
 854                 WindowEvent.WINDOW_STATE_CHANGED,
 855                 windowState, newWindowState);
 856         postEvent(stateChangedEvent);
 857         windowState = newWindowState;
 858     }
 859 
 860     private static int getGraphicsConfigScreen(GraphicsConfiguration gc) {
 861         // TODO: this method can be implemented in a more
 862         // efficient way by forwarding to the delegate
 863         GraphicsDevice gd = gc.getDevice();
 864         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 865         GraphicsDevice[] gds = ge.getScreenDevices();
 866         for (int i = 0; i < gds.length; i++) {
 867             if (gds[i] == gd) {
 868                 return i;
 869             }
 870         }
 871         // Should never happen if gc is a screen device config
 872         return 0;
 873     }
 874 
 875     private static GraphicsConfiguration getScreenGraphicsConfig(int screen) {
 876         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 877         GraphicsDevice[] gds = ge.getScreenDevices();
 878         if (screen >= gds.length) {
 879             // This could happen during device addition/removal. Use
 880             // the default screen device in this case
 881             return ge.getDefaultScreenDevice().getDefaultConfiguration();
 882         }
 883         return gds[screen].getDefaultConfiguration();
 884     }
 885 
 886     /*
 887      * This method is called when window's graphics config is changed from
 888      * the app code (e.g. when the window is made non-opaque) or when
 889      * the window is moved to another screen by user.
 890      *
 891      * Returns true if the graphics config has been changed, false otherwise.
 892      */
 893     private boolean setGraphicsConfig(GraphicsConfiguration gc) {
 894         synchronized (getStateLock()) {
 895             if (graphicsConfig == gc) {
 896                 return false;
 897             }
 898             // If window's graphics config is changed from the app code, the
 899             // config correspond to the same device as before; when the window
 900             // is moved by user, screenOn is updated in checkIfOnNewScreen().
 901             // In either case, there's nothing to do with screenOn here
 902             graphicsConfig = gc;
 903         }
 904         // SurfaceData is replaced later in updateGraphicsData()
 905         return true;
 906     }
 907 
 908     private void checkIfOnNewScreen() {
 909         int windowScreen = platformWindow.getScreenImOn();
 910         synchronized (getStateLock()) {
 911             if (windowScreen == screenOn) {
 912                 return;
 913             }
 914             screenOn = windowScreen;
 915         }
 916 
 917         // TODO: DisplayChangedListener stuff
 918         final GraphicsConfiguration newGC = getScreenGraphicsConfig(windowScreen);
 919         if (!setGraphicsConfig(newGC)) return;
 920 
 921         SunToolkit.executeOnEventHandlerThread(getTarget(), new Runnable() {
 922             public void run() {
 923                 AWTAccessor.getComponentAccessor().setGraphicsConfiguration(getTarget(), newGC);
 924             }
 925         });
 926     }
 927 
 928     /**
 929      * This method returns a back buffer Graphics to render all the
 930      * peers to. After the peer is painted, the back buffer contents
 931      * should be flushed to the screen. All the target painting
 932      * (Component.paint() method) should be done directly to the screen.
 933      */
 934     protected final Graphics getOffscreenGraphics(Color fg, Color bg, Font f) {
 935         final Image bb = getBackBuffer();
 936         if (bb == null) {
 937             return null;
 938         }
 939         if (fg == null) {
 940             fg = SystemColor.windowText;
 941         }
 942         if (bg == null) {
 943             bg = SystemColor.window;
 944         }
 945         if (f == null) {
 946             f = DEFAULT_FONT;
 947         }
 948         final Graphics2D g = (Graphics2D) bb.getGraphics();
 949         if (g != null) {
 950             g.setColor(fg);
 951             g.setBackground(bg);
 952             g.setFont(f);
 953         }
 954         return g;
 955     }
 956 
 957     /*
 958      * May be called by delegate to provide SD to Java2D code.
 959      */
 960     public SurfaceData getSurfaceData() {
 961         synchronized (surfaceDataLock) {
 962             return surfaceData;
 963         }
 964     }
 965 
 966     private void replaceSurfaceData() {
 967         replaceSurfaceData(backBufferCount, backBufferCaps);
 968     }
 969 
 970     private void replaceSurfaceData(int newBackBufferCount,
 971                                                  BufferCapabilities newBackBufferCaps) {
 972         synchronized (surfaceDataLock) {
 973             final SurfaceData oldData = getSurfaceData();
 974             surfaceData = platformWindow.replaceSurfaceData();
 975             // TODO: volatile image
 976     //        VolatileImage oldBB = backBuffer;
 977             BufferedImage oldBB = backBuffer;
 978             backBufferCount = newBackBufferCount;
 979             backBufferCaps = newBackBufferCaps;
 980             final Rectangle size = getSize();
 981             if (getSurfaceData() != null && oldData != getSurfaceData()) {
 982                 clearBackground(size.width, size.height);
 983             }
 984             blitSurfaceData(oldData, getSurfaceData());
 985 
 986             if (oldData != null && oldData != getSurfaceData()) {
 987                 // TODO: drop oldData for D3D/WGL pipelines
 988                 // This can only happen when this peer is being created
 989                 oldData.flush();
 990             }
 991 
 992             // TODO: volatile image
 993     //        backBuffer = (VolatileImage)delegate.createBackBuffer();
 994             backBuffer = (BufferedImage) platformWindow.createBackBuffer();
 995             if (backBuffer != null) {
 996                 Graphics g = backBuffer.getGraphics();
 997                 try {
 998                     Rectangle r = getBounds();
 999                     g.setColor(getBackground());
1000                     g.fillRect(0, 0, r.width, r.height);
1001                     if (oldBB != null) {
1002                         // Draw the old back buffer to the new one
1003                         g.drawImage(oldBB, 0, 0, null);
1004                         oldBB.flush();
1005                     }
1006                 } finally {
1007                     g.dispose();
1008                 }
1009             }
1010         }
1011     }
1012 
1013     private void blitSurfaceData(final SurfaceData src, final SurfaceData dst) {
1014         //TODO blit. proof-of-concept
1015         if (src != dst && src != null && dst != null
1016             && !(dst instanceof NullSurfaceData)
1017             && !(src instanceof NullSurfaceData)
1018             && src.getSurfaceType().equals(dst.getSurfaceType())) {
1019             final Rectangle size = getSize();
1020             final Blit blit = Blit.locate(src.getSurfaceType(),
1021                                           CompositeType.Src,
1022                                           dst.getSurfaceType());
1023             if (blit != null) {
1024                 blit.Blit(src, dst, ((Graphics2D) getGraphics()).getComposite(),
1025                           getRegion(), 0, 0, 0, 0, size.width, size.height);
1026             }
1027         }
1028     }
1029 
1030     public int getBackBufferCount() {
1031         return backBufferCount;
1032     }
1033 
1034     public BufferCapabilities getBackBufferCaps() {
1035         return backBufferCaps;
1036     }
1037 
1038     /*
1039      * Request the window insets from the delegate and compares it
1040      * with the current one. This method is mostly called by the
1041      * delegate, e.g. when the window state is changed and insets
1042      * should be recalculated.
1043      *
1044      * This method may be called on the toolkit thread.
1045      */
1046     public boolean updateInsets(Insets newInsets) {
1047         boolean changed = false;
1048         synchronized (getStateLock()) {
1049             changed = (insets.equals(newInsets));
1050             insets = newInsets;
1051         }
1052 
1053         if (changed) {
1054             replaceSurfaceData();
1055             repaintPeer();
1056         }
1057 
1058         return changed;
1059     }
1060 
1061     public static LWWindowPeer getWindowUnderCursor() {
1062         return lastMouseEventPeer != null ? lastMouseEventPeer.getWindowPeerOrSelf() : null;
1063     }
1064 
1065     public static LWComponentPeer<?, ?> getPeerUnderCursor() {
1066         return lastMouseEventPeer;
1067     }
1068 
1069     public boolean requestWindowFocus(CausedFocusEvent.Cause cause) {
1070         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1071             focusLog.fine("requesting native focus to " + this);
1072         }
1073 
1074         if (!focusAllowedFor()) {
1075             focusLog.fine("focus is not allowed");
1076             return false;
1077         }
1078 
1079         if (platformWindow.rejectFocusRequest(cause)) {
1080             return false;
1081         }
1082 
1083         Window currentActive = KeyboardFocusManager.
1084             getCurrentKeyboardFocusManager().getActiveWindow();
1085 
1086         // Make the owner active window.
1087         if (isSimpleWindow()) {
1088             LWWindowPeer owner = getOwnerFrameDialog(this);
1089 
1090             // If owner is not natively active, request native
1091             // activation on it w/o sending events up to java.
1092             if (owner != null && !owner.platformWindow.isActive()) {
1093                 if (focusLog.isLoggable(PlatformLogger.FINE)) {
1094                     focusLog.fine("requesting native focus to the owner " + owner);
1095                 }
1096                 LWWindowPeer currentActivePeer = (currentActive != null ?
1097                     (LWWindowPeer)currentActive.getPeer() : null);
1098 
1099                 // Ensure the opposite is natively active and suppress sending events.
1100                 if (currentActivePeer != null && currentActivePeer.platformWindow.isActive()) {
1101                     if (focusLog.isLoggable(PlatformLogger.FINE)) {
1102                         focusLog.fine("the opposite is " + currentActivePeer);
1103                     }
1104                     currentActivePeer.skipNextFocusChange = true;
1105                 }
1106                 owner.skipNextFocusChange = true;
1107 
1108                 owner.platformWindow.requestWindowFocus();
1109             }
1110 
1111             // DKFM will synthesize all the focus/activation events correctly.
1112             changeFocusedWindow(true, false);
1113             return true;
1114 
1115         // In case the toplevel is active but not focused, change focus directly,
1116         // as requesting native focus on it will not have effect.
1117         } else if (getTarget() == currentActive && !getTarget().hasFocus()) {
1118 
1119             changeFocusedWindow(true, false);
1120             return true;
1121         }
1122         return platformWindow.requestWindowFocus();
1123     }
1124 
1125     private boolean focusAllowedFor() {
1126         Window window = getTarget();
1127         // TODO: check if modal blocked
1128         return window.isVisible() && window.isEnabled() && window.isFocusableWindow();
1129     }
1130 
1131     public boolean isSimpleWindow() {
1132         Window window = getTarget();
1133         return !(window instanceof Dialog || window instanceof Frame);
1134     }
1135 
1136     /*
1137      * "Delegates" the responsibility of managing focus to keyboard focus manager.
1138      */
1139     private void changeFocusedWindow(boolean becomesFocused, boolean isShowing) {
1140         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1141             focusLog.fine((becomesFocused?"gaining":"loosing") + " focus window: " + this);
1142         }
1143         if (isShowing && !getTarget().isAutoRequestFocus() || skipNextFocusChange) {
1144             focusLog.fine("skipping focus change");
1145             skipNextFocusChange = false;
1146             return;
1147         }
1148 
1149         if (!cachedFocusableWindow) {
1150             return;
1151         }
1152         if (becomesFocused) {
1153             synchronized (getPeerTreeLock()) {
1154                 if (blocker != null) {
1155                     if (focusLog.isLoggable(PlatformLogger.FINEST)) {
1156                         focusLog.finest("the window is blocked by " + blocker);
1157                     }
1158                     return;
1159                 }
1160             }
1161         }
1162 
1163         LWKeyboardFocusManagerPeer manager = LWKeyboardFocusManagerPeer.
1164             getInstance(getAppContext());
1165 
1166         Window oppositeWindow = becomesFocused ? manager.getCurrentFocusedWindow() : null;
1167 
1168         // Note, the method is not called:
1169         // - when the opposite (gaining focus) window is an owned/owner window.
1170         // - for a simple window in any case.
1171         if (!becomesFocused &&
1172             (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
1173         {
1174             focusLog.fine("ungrabbing on " + grabbingWindow);
1175             // ungrab a simple window if its owner looses activation.
1176             grabbingWindow.ungrab();
1177         }
1178 
1179         manager.setFocusedWindow(becomesFocused ? LWWindowPeer.this : null);
1180 
1181         int eventID = becomesFocused ? WindowEvent.WINDOW_GAINED_FOCUS : WindowEvent.WINDOW_LOST_FOCUS;
1182         WindowEvent windowEvent = new WindowEvent(getTarget(), eventID, oppositeWindow);
1183 
1184         // TODO: wrap in SequencedEvent
1185         postEvent(windowEvent);
1186     }
1187 
1188     private static LWWindowPeer getOwnerFrameDialog(LWWindowPeer peer) {
1189         Window owner = (peer != null ? peer.getTarget().getOwner() : null);
1190         while (owner != null && !(owner instanceof Frame || owner instanceof Dialog)) {
1191             owner = owner.getOwner();
1192         }
1193         return owner != null ? (LWWindowPeer)owner.getPeer() : null;
1194     }
1195 
1196     /**
1197      * Returns the foremost modal blocker of this window, or null.
1198      */
1199     public LWWindowPeer getBlocker() {
1200         synchronized (getPeerTreeLock()) {
1201             LWWindowPeer blocker = this.blocker;
1202             if (blocker == null) {
1203                 return null;
1204             }
1205             while (blocker.blocker != null) {
1206                 blocker = blocker.blocker;
1207             }
1208             return blocker;
1209         }
1210     }
1211 
1212     public void enterFullScreenMode() {
1213         platformWindow.enterFullScreenMode();
1214     }
1215 
1216     public void exitFullScreenMode() {
1217         platformWindow.exitFullScreenMode();
1218     }
1219 
1220     public long getLayerPtr() {
1221         return getPlatformWindow().getLayerPtr();
1222     }
1223 
1224     void grab() {
1225         if (grabbingWindow != null && !isGrabbing()) {
1226             grabbingWindow.ungrab();
1227         }
1228         grabbingWindow = this;
1229     }
1230 
1231     void ungrab() {
1232         if (isGrabbing()) {
1233             grabbingWindow = null;
1234             postEvent(new UngrabEvent(getTarget()));
1235         }
1236     }
1237 
1238     private boolean isGrabbing() {
1239         return this == grabbingWindow;
1240     }
1241 
1242     @Override
1243     public String toString() {
1244         return super.toString() + " [target is " + getTarget() + "]";
1245     }
1246 }