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.peer.*;
  31 import java.util.List;
  32 
  33 import javax.swing.*;
  34 
  35 import sun.awt.*;
  36 import sun.java2d.*;
  37 import sun.java2d.loops.Blit;
  38 import sun.java2d.loops.CompositeType;
  39 import sun.java2d.pipe.Region;
  40 import sun.util.logging.PlatformLogger;
  41 
  42 public class LWWindowPeer
  43     extends LWContainerPeer<Window, JComponent>
  44     implements WindowPeer, FramePeer, DialogPeer, FullScreenCapable
  45 {
  46     public static enum PeerType {
  47         SIMPLEWINDOW,
  48         FRAME,
  49         DIALOG,
  50         EMBEDDEDFRAME
  51     }
  52 
  53     private static final PlatformLogger focusLog = PlatformLogger.getLogger("sun.lwawt.focus.LWWindowPeer");
  54 
  55     private PlatformWindow platformWindow;
  56 
  57     // Window bounds reported by the native system (as opposed to
  58     // regular bounds inherited from LWComponentPeer which are
  59     // requested by user and may haven't been applied yet because
  60     // of asynchronous requests to the windowing system)
  61     private int sysX;
  62     private int sysY;
  63     private int sysW;
  64     private int sysH;
  65 
  66     private static final int MINIMUM_WIDTH = 1;
  67     private static final int MINIMUM_HEIGHT = 1;
  68 
  69     private Insets insets = new Insets(0, 0, 0, 0);
  70 
  71     private GraphicsDevice graphicsDevice;
  72     private GraphicsConfiguration graphicsConfig;
  73 
  74     private SurfaceData surfaceData;
  75     private final Object surfaceDataLock = new Object();
  76 
  77     private volatile int windowState = Frame.NORMAL;
  78 
  79     // check that the mouse is over the window
  80     private volatile boolean isMouseOver = false;
  81 
  82     // A peer where the last mouse event came to. Used by cursor manager to
  83     // find the component under cursor
  84     private static volatile LWComponentPeer lastCommonMouseEventPeer = null;
  85 
  86     // A peer where the last mouse event came to. Used to generate
  87     // MOUSE_ENTERED/EXITED notifications
  88     private volatile LWComponentPeer lastMouseEventPeer;
  89 
  90     // Peers where all dragged/released events should come to,
  91     // depending on what mouse button is being dragged according to Cocoa
  92     private static LWComponentPeer mouseDownTarget[] = new LWComponentPeer[3];
  93 
  94     // A bitmask that indicates what mouse buttons produce MOUSE_CLICKED events
  95     // on MOUSE_RELEASE. Click events are only generated if there were no drag
  96     // events between MOUSE_PRESSED and MOUSE_RELEASED for particular button
  97     private static int mouseClickButtons = 0;
  98 
  99     private volatile boolean isOpaque = true;
 100 
 101     private static final Font DEFAULT_FONT = new Font("Lucida Grande", Font.PLAIN, 13);
 102 
 103     private static LWWindowPeer grabbingWindow;
 104 
 105     private volatile boolean skipNextFocusChange;
 106 
 107     private static final Color nonOpaqueBackground = new Color(0, 0, 0, 0);
 108 
 109     private volatile boolean textured;
 110 
 111     /**
 112      * Current modal blocker or null.
 113      *
 114      * Synchronization: peerTreeLock.
 115      */
 116     private LWWindowPeer blocker;
 117 
 118     public LWWindowPeer(Window target, PlatformComponent platformComponent,
 119                         PlatformWindow platformWindow)
 120     {
 121         super(target, platformComponent);
 122         this.platformWindow = platformWindow;
 123 
 124         Window owner = target.getOwner();
 125         LWWindowPeer ownerPeer = (owner != null) ? (LWWindowPeer)owner.getPeer() : null;
 126         PlatformWindow ownerDelegate = (ownerPeer != null) ? ownerPeer.getPlatformWindow() : null;
 127 
 128         // The delegate.initialize() needs a non-null GC on X11.
 129         GraphicsConfiguration gc = getTarget().getGraphicsConfiguration();
 130         synchronized (getStateLock()) {
 131             // graphicsConfig should be updated according to the real window
 132             // bounds when the window is shown, see 4868278
 133             this.graphicsConfig = gc;
 134         }
 135 
 136         if (!target.isFontSet()) {
 137             target.setFont(DEFAULT_FONT);
 138         }
 139 
 140         if (!target.isBackgroundSet()) {
 141             target.setBackground(SystemColor.window);
 142         } else {
 143             // first we check if user provided alpha for background. This is
 144             // similar to what Apple's Java do.
 145             // Since JDK7 we should rely on setOpacity() only.
 146             // this.opacity = c.getAlpha();
 147         }
 148 
 149         if (!target.isForegroundSet()) {
 150             target.setForeground(SystemColor.windowText);
 151             // we should not call setForeground because it will call a repaint
 152             // which the peer may not be ready to do yet.
 153         }
 154 
 155         platformWindow.initialize(target, this, ownerDelegate);
 156     }
 157 
 158     @Override
 159     void initializeImpl() {
 160         super.initializeImpl();
 161         if (getTarget() instanceof Frame) {
 162             setTitle(((Frame) getTarget()).getTitle());
 163             setState(((Frame) getTarget()).getExtendedState());
 164         } else if (getTarget() instanceof Dialog) {
 165             setTitle(((Dialog) getTarget()).getTitle());
 166         }
 167 
 168         setAlwaysOnTop(getTarget().isAlwaysOnTop());
 169         updateMinimumSize();
 170 
 171         final Shape shape = getTarget().getShape();
 172         if (shape != null) {
 173             applyShape(Region.getInstance(shape, null));
 174         }
 175 
 176         final float opacity = getTarget().getOpacity();
 177         if (opacity < 1.0f) {
 178             setOpacity(opacity);
 179         }
 180 
 181         setOpaque(getTarget().isOpaque());
 182 
 183         updateInsets(platformWindow.getInsets());
 184         if (getSurfaceData() == null) {
 185             replaceSurfaceData(false);
 186         }
 187     }
 188 
 189     // Just a helper method
 190     public PlatformWindow getPlatformWindow() {
 191         return platformWindow;
 192     }
 193 
 194     @Override
 195     protected LWWindowPeer getWindowPeerOrSelf() {
 196         return this;
 197     }
 198 
 199     @Override
 200     protected void initializeContainerPeer() {
 201         // No-op as LWWindowPeer doesn't have any containerPeer
 202     }
 203 
 204     // ---- PEER METHODS ---- //
 205 
 206     @Override
 207     protected void disposeImpl() {
 208         SurfaceData oldData = getSurfaceData();
 209         synchronized (surfaceDataLock){
 210             surfaceData = null;
 211         }
 212         if (oldData != null) {
 213             oldData.invalidate();
 214         }
 215         if (isGrabbing()) {
 216             ungrab();
 217         }
 218         platformWindow.dispose();
 219         super.disposeImpl();
 220     }
 221 
 222     @Override
 223     protected void setVisibleImpl(final boolean visible) {
 224         super.setVisibleImpl(visible);
 225         // TODO: update graphicsConfig, see 4868278
 226         platformWindow.setVisible(visible);
 227         if (isSimpleWindow()) {
 228             KeyboardFocusManagerPeer kfmPeer = LWKeyboardFocusManagerPeer.getInstance();
 229 
 230             if (visible) {
 231                 if (!getTarget().isAutoRequestFocus()) {
 232                     return;
 233                 } else {
 234                     requestWindowFocus(CausedFocusEvent.Cause.ACTIVATION);
 235                 }
 236             // Focus the owner in case this window is focused.
 237             } else if (kfmPeer.getCurrentFocusedWindow() == getTarget()) {
 238                 // Transfer focus to the owner.
 239                 LWWindowPeer owner = getOwnerFrameDialog(LWWindowPeer.this);
 240                 if (owner != null) {
 241                     owner.requestWindowFocus(CausedFocusEvent.Cause.ACTIVATION);
 242                 }
 243             }
 244         }
 245     }
 246 
 247     @Override
 248     public final GraphicsConfiguration getGraphicsConfiguration() {
 249         synchronized (getStateLock()) {
 250             return graphicsConfig;
 251         }
 252     }
 253 
 254     @Override
 255     public boolean updateGraphicsData(GraphicsConfiguration gc) {
 256         setGraphicsConfig(gc);
 257         return false;
 258     }
 259 
 260     protected final Graphics getOnscreenGraphics(Color fg, Color bg, Font f) {
 261         if (getSurfaceData() == null) {
 262             return null;
 263         }
 264         if (fg == null) {
 265             fg = SystemColor.windowText;
 266         }
 267         if (bg == null) {
 268             bg = SystemColor.window;
 269         }
 270         if (f == null) {
 271             f = DEFAULT_FONT;
 272         }
 273         return platformWindow.transformGraphics(new SunGraphics2D(getSurfaceData(), fg, bg, f));
 274     }
 275 
 276     @Override
 277     public void setBounds(int x, int y, int w, int h, int op) {
 278         if ((op & SET_CLIENT_SIZE) != 0) {
 279             // SET_CLIENT_SIZE is only applicable to window peers, so handle it here
 280             // instead of pulling 'insets' field up to LWComponentPeer
 281             // no need to add insets since Window's notion of width and height includes insets.
 282             op &= ~SET_CLIENT_SIZE;
 283             op |= SET_SIZE;
 284         }
 285 
 286         if (w < MINIMUM_WIDTH) {
 287             w = MINIMUM_WIDTH;
 288         }
 289         if (h < MINIMUM_HEIGHT) {
 290             h = MINIMUM_HEIGHT;
 291         }
 292 
 293         final int maxW = getLWGC().getMaxTextureWidth();
 294         final int maxH = getLWGC().getMaxTextureHeight();
 295 
 296         if (w > maxW) {
 297             w = maxW;
 298         }
 299         if (h > maxH) {
 300             h = maxH;
 301         }
 302 
 303         // Don't post ComponentMoved/Resized and Paint events
 304         // until we've got a notification from the delegate
 305         setBounds(x, y, w, h, op, false, false);
 306         // Get updated bounds, so we don't have to handle 'op' here manually
 307         Rectangle r = getBounds();
 308         platformWindow.setBounds(r.x, r.y, r.width, r.height);
 309     }
 310 
 311     @Override
 312     public Point getLocationOnScreen() {
 313         return platformWindow.getLocationOnScreen();
 314     }
 315 
 316     /**
 317      * Overridden from LWContainerPeer to return the correct insets.
 318      * Insets are queried from the delegate and are kept up to date by
 319      * requiering when needed (i.e. when the window geometry is changed).
 320      */
 321     @Override
 322     public Insets getInsets() {
 323         synchronized (getStateLock()) {
 324             return insets;
 325         }
 326     }
 327 
 328     @Override
 329     public FontMetrics getFontMetrics(Font f) {
 330         // TODO: check for "use platform metrics" settings
 331         return platformWindow.getFontMetrics(f);
 332     }
 333 
 334     @Override
 335     public void toFront() {
 336         platformWindow.toFront();
 337     }
 338 
 339     @Override
 340     public void toBack() {
 341         platformWindow.toBack();
 342     }
 343 
 344     @Override
 345     public void setZOrder(ComponentPeer above) {
 346         throw new RuntimeException("not implemented");
 347     }
 348 
 349     @Override
 350     public void setAlwaysOnTop(boolean value) {
 351         platformWindow.setAlwaysOnTop(value);
 352     }
 353 
 354     @Override
 355     public void updateFocusableWindowState() {
 356         platformWindow.updateFocusableWindowState();
 357     }
 358 
 359     @Override
 360     public void setModalBlocked(Dialog blocker, boolean blocked) {
 361         synchronized (getPeerTreeLock()) {
 362             this.blocker = blocked ? (LWWindowPeer)blocker.getPeer() : null;
 363         }
 364 
 365         platformWindow.setModalBlocked(blocked);
 366     }
 367 
 368     @Override
 369     public void updateMinimumSize() {
 370         final Dimension min;
 371         if (getTarget().isMinimumSizeSet()) {
 372             min = getTarget().getMinimumSize();
 373             min.width = Math.max(min.width, MINIMUM_WIDTH);
 374             min.height = Math.max(min.height, MINIMUM_HEIGHT);
 375         } else {
 376             min = new Dimension(MINIMUM_WIDTH, MINIMUM_HEIGHT);
 377         }
 378 
 379         final Dimension max;
 380         if (getTarget().isMaximumSizeSet()) {
 381             max = getTarget().getMaximumSize();
 382             max.width = Math.min(max.width, getLWGC().getMaxTextureWidth());
 383             max.height = Math.min(max.height, getLWGC().getMaxTextureHeight());
 384         } else {
 385             max = new Dimension(getLWGC().getMaxTextureWidth(),
 386                                 getLWGC().getMaxTextureHeight());
 387         }
 388 
 389         platformWindow.setSizeConstraints(min.width, min.height, max.width, max.height);
 390     }
 391 
 392     @Override
 393     public void updateIconImages() {
 394         getPlatformWindow().updateIconImages();
 395     }
 396 
 397     @Override
 398     public void setOpacity(float opacity) {
 399         getPlatformWindow().setOpacity(opacity);
 400         repaintPeer();
 401     }
 402 
 403     @Override
 404     public final void setOpaque(final boolean isOpaque) {
 405         if (this.isOpaque != isOpaque) {
 406             this.isOpaque = isOpaque;
 407             updateOpaque();
 408         }
 409     }
 410 
 411     private void updateOpaque() {
 412         getPlatformWindow().setOpaque(!isTranslucent());
 413         replaceSurfaceData(false);
 414         repaintPeer();
 415     }
 416 
 417     @Override
 418     public void updateWindow() {
 419     }
 420 
 421     public final boolean isTextured() {
 422         return textured;
 423     }
 424 
 425     public final void setTextured(final boolean isTextured) {
 426         textured = isTextured;
 427     }
 428 
 429     public final boolean isTranslucent() {
 430         synchronized (getStateLock()) {
 431             /*
 432              * Textured window is a special case of translucent window.
 433              * The difference is only in nswindow background. So when we set
 434              * texture property our peer became fully translucent. It doesn't
 435              * fill background, create non opaque backbuffers and layer etc.
 436              */
 437             return !isOpaque || isShaped() || isTextured();
 438         }
 439     }
 440 
 441     @Override
 442     final void applyShapeImpl(final Region shape) {
 443         super.applyShapeImpl(shape);
 444         updateOpaque();
 445     }
 446 
 447     @Override
 448     public void repositionSecurityWarning() {
 449         throw new RuntimeException("not implemented");
 450     }
 451 
 452     // ---- FRAME PEER METHODS ---- //
 453 
 454     @Override // FramePeer and DialogPeer
 455     public void setTitle(String title) {
 456         platformWindow.setTitle(title == null ? "" : title);
 457     }
 458 
 459     @Override
 460     public void setMenuBar(MenuBar mb) {
 461          platformWindow.setMenuBar(mb);
 462     }
 463 
 464     @Override // FramePeer and DialogPeer
 465     public void setResizable(boolean resizable) {
 466         platformWindow.setResizable(resizable);
 467     }
 468 
 469     @Override
 470     public void setState(int state) {
 471         platformWindow.setWindowState(state);
 472     }
 473 
 474     @Override
 475     public int getState() {
 476         return windowState;
 477     }
 478 
 479     @Override
 480     public void setMaximizedBounds(Rectangle bounds) {
 481         // TODO: not implemented
 482     }
 483 
 484     @Override
 485     public void setBoundsPrivate(int x, int y, int width, int height) {
 486         setBounds(x, y, width, height, SET_BOUNDS | NO_EMBEDDED_CHECK);
 487     }
 488 
 489     @Override
 490     public Rectangle getBoundsPrivate() {
 491         throw new RuntimeException("not implemented");
 492     }
 493 
 494     // ---- DIALOG PEER METHODS ---- //
 495 
 496     @Override
 497     public void blockWindows(List<Window> windows) {
 498         //TODO: LWX will probably need some collectJavaToplevels to speed this up
 499         for (Window w : windows) {
 500             WindowPeer wp = (WindowPeer)w.getPeer();
 501             if (wp != null) {
 502                 wp.setModalBlocked((Dialog)getTarget(), true);
 503             }
 504         }
 505     }
 506 
 507     // ---- PEER NOTIFICATIONS ---- //
 508 
 509     public void notifyIconify(boolean iconify) {
 510         //The toplevel target is Frame and states are applicable to it.
 511         //Otherwise, the target is Window and it don't have state property.
 512         //Hopefully, no such events are posted in the queue so consider the
 513         //target as Frame in all cases.
 514 
 515         // REMIND: should we send it anyway if the state not changed since last
 516         // time?
 517         WindowEvent iconifyEvent = new WindowEvent(getTarget(),
 518                 iconify ? WindowEvent.WINDOW_ICONIFIED
 519                         : WindowEvent.WINDOW_DEICONIFIED);
 520         postEvent(iconifyEvent);
 521 
 522         int newWindowState = iconify ? Frame.ICONIFIED : Frame.NORMAL;
 523         postWindowStateChangedEvent(newWindowState);
 524 
 525         // REMIND: RepaintManager doesn't repaint iconified windows and
 526         // hence ignores any repaint request during deiconification.
 527         // So, we need to repaint window explicitly when it becomes normal.
 528         if (!iconify) {
 529             repaintPeer();
 530         }
 531     }
 532 
 533     public void notifyZoom(boolean isZoomed) {
 534         int newWindowState = isZoomed ? Frame.MAXIMIZED_BOTH : Frame.NORMAL;
 535         postWindowStateChangedEvent(newWindowState);
 536     }
 537 
 538     /**
 539      * Called by the {@code PlatformWindow} when any part of the window should
 540      * be repainted.
 541      */
 542     public final void notifyExpose(final Rectangle r) {
 543         repaintPeer(r);
 544     }
 545 
 546     /**
 547      * Called by the {@code PlatformWindow} when this window is moved/resized by
 548      * user. There's no notifyReshape() in LWComponentPeer as the only
 549      * components which could be resized by user are top-level windows.
 550      */
 551     public final void notifyReshape(int x, int y, int w, int h) {
 552         final boolean moved;
 553         final boolean resized;
 554         synchronized (getStateLock()) {
 555             moved = (x != sysX) || (y != sysY);
 556             resized = (w != sysW) || (h != sysH);
 557             sysX = x;
 558             sysY = y;
 559             sysW = w;
 560             sysH = h;
 561         }
 562 
 563         // Check if anything changed
 564         if (!moved && !resized) {
 565             return;
 566         }
 567         // First, update peer's bounds
 568         setBounds(x, y, w, h, SET_BOUNDS, false, false);
 569 
 570         // Second, update the graphics config and surface data
 571         checkIfOnNewScreen();
 572         if (resized) {
 573             replaceSurfaceData();
 574             flushOnscreenGraphics();
 575         }
 576 
 577         // Third, COMPONENT_MOVED/COMPONENT_RESIZED/PAINT events
 578         if (moved) {
 579             handleMove(x, y, true);
 580         }
 581         if (resized) {
 582             handleResize(w, h, true);
 583             repaintPeer();
 584         }
 585     }
 586 
 587     private void clearBackground(final int w, final int h) {
 588         final Graphics g = getOnscreenGraphics(getForeground(), getBackground(),
 589                                                getFont());
 590         if (g != null) {
 591             try {
 592                 if (g instanceof Graphics2D) {
 593                     ((Graphics2D) g).setComposite(AlphaComposite.Src);
 594                 }
 595                 if (isTranslucent()) {
 596                     g.setColor(nonOpaqueBackground);
 597                     g.fillRect(0, 0, w, h);
 598                 }
 599                 if (!isTextured()) {
 600                     if (g instanceof SunGraphics2D) {
 601                         SG2DConstraint((SunGraphics2D) g, getRegion());
 602                     }
 603                     g.setColor(getBackground());
 604                     g.fillRect(0, 0, w, h);
 605                 }
 606             } finally {
 607                 g.dispose();
 608             }
 609         }
 610     }
 611 
 612     public void notifyUpdateCursor() {
 613         getLWToolkit().getCursorManager().updateCursorLater(this);
 614     }
 615 
 616     public void notifyActivation(boolean activation, LWWindowPeer opposite) {
 617         Window oppositeWindow = (opposite == null)? null : opposite.getTarget();
 618         changeFocusedWindow(activation, oppositeWindow);
 619     }
 620 
 621     // MouseDown in non-client area
 622     public void notifyNCMouseDown() {
 623         // Ungrab except for a click on a Dialog with the grabbing owner
 624         if (grabbingWindow != null &&
 625             grabbingWindow != getOwnerFrameDialog(this))
 626         {
 627             grabbingWindow.ungrab();
 628         }
 629     }
 630 
 631     // ---- EVENTS ---- //
 632 
 633     /*
 634      * Called by the delegate to dispatch the event to Java. Event
 635      * coordinates are relative to non-client window are, i.e. the top-left
 636      * point of the client area is (insets.top, insets.left).
 637      */
 638     public void dispatchMouseEvent(int id, long when, int button,
 639                                    int x, int y, int screenX, int screenY,
 640                                    int modifiers, int clickCount, boolean popupTrigger,
 641                                    byte[] bdata)
 642     {
 643         // TODO: fill "bdata" member of AWTEvent
 644         Rectangle r = getBounds();
 645         // findPeerAt() expects parent coordinates
 646         LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 647 
 648         if (id == MouseEvent.MOUSE_EXITED) {
 649             isMouseOver = false;
 650             if (lastMouseEventPeer != null) {
 651                 if (lastMouseEventPeer.isEnabled()) {
 652                     Point lp = lastMouseEventPeer.windowToLocal(x, y,
 653                             this);
 654                     postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 655                             MouseEvent.MOUSE_EXITED, when,
 656                             modifiers, lp.x, lp.y, screenX,
 657                             screenY, clickCount, popupTrigger,
 658                             button));
 659                 }
 660 
 661                 // Sometimes we may get MOUSE_EXITED after lastCommonMouseEventPeer 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 (lastCommonMouseEventPeer != null && lastCommonMouseEventPeer.getWindowPeerOrSelf() == this) {
 665                     lastCommonMouseEventPeer = null;
 666                 }
 667                 lastMouseEventPeer = null;
 668             }
 669         } else if(id == MouseEvent.MOUSE_ENTERED) {
 670             isMouseOver = true;
 671             if (targetPeer != null) {
 672                 if (targetPeer.isEnabled()) {
 673                     Point lp = targetPeer.windowToLocal(x, y, this);
 674                         postEvent(new MouseEvent(targetPeer.getTarget(),
 675                             MouseEvent.MOUSE_ENTERED, when,
 676                             modifiers, lp.x, lp.y, screenX,
 677                             screenY, clickCount, popupTrigger,
 678                             button));
 679                 }
 680                 lastCommonMouseEventPeer = targetPeer;
 681                 lastMouseEventPeer = targetPeer;
 682             }
 683         } else {
 684             PlatformWindow topmostPlatforWindow =
 685                     platformWindow.getTopmostPlatformWindowUnderMouse();
 686 
 687             LWWindowPeer topmostWindowPeer =
 688                     topmostPlatforWindow != null ? topmostPlatforWindow.getPeer() : null;
 689 
 690             // topmostWindowPeer == null condition is added for the backward
 691             // compatibility with applets. It can be removed when the
 692             // getTopmostPlatformWindowUnderMouse() method will be properly
 693             // implemented in CPlatformEmbeddedFrame class
 694             if (topmostWindowPeer == this || topmostWindowPeer == null) {
 695                 generateMouseEnterExitEventsForComponents(when, button, x, y,
 696                         screenX, screenY, modifiers, clickCount, popupTrigger,
 697                         targetPeer);
 698             } else {
 699                 LWComponentPeer topmostTargetPeer =
 700                         topmostWindowPeer != null ? topmostWindowPeer.findPeerAt(r.x + x, r.y + y) : null;
 701                 topmostWindowPeer.generateMouseEnterExitEventsForComponents(when, button, x, y,
 702                         screenX, screenY, modifiers, clickCount, popupTrigger,
 703                         topmostTargetPeer);
 704             }
 705 
 706             // TODO: fill "bdata" member of AWTEvent
 707 
 708             int eventButtonMask = (button > 0)? MouseEvent.getMaskForButton(button) : 0;
 709             int otherButtonsPressed = modifiers & ~eventButtonMask;
 710 
 711             // For pressed/dragged/released events OS X treats other
 712             // mouse buttons as if they were BUTTON2, so we do the same
 713             int targetIdx = (button > 3) ? MouseEvent.BUTTON2 - 1 : button - 1;
 714 
 715             // MOUSE_ENTERED/EXITED are generated for the components strictly under
 716             // mouse even when dragging. That's why we first update lastMouseEventPeer
 717             // based on initial targetPeer value and only then recalculate targetPeer
 718             // for MOUSE_DRAGGED/RELEASED events
 719             if (id == MouseEvent.MOUSE_PRESSED) {
 720 
 721                 // Ungrab only if this window is not an owned window of the grabbing one.
 722                 if (!isGrabbing() && grabbingWindow != null &&
 723                     grabbingWindow != getOwnerFrameDialog(this))
 724                 {
 725                     grabbingWindow.ungrab();
 726                 }
 727                 if (otherButtonsPressed == 0) {
 728                     mouseClickButtons = eventButtonMask;
 729                 } else {
 730                     mouseClickButtons |= eventButtonMask;
 731                 }
 732 
 733                 // The window should be focused on mouse click. If it gets activated by the native platform,
 734                 // this request will be no op. It will take effect when:
 735                 // 1. A simple not focused window is clicked.
 736                 // 2. An active but not focused owner frame/dialog is clicked.
 737                 // The mouse event then will trigger a focus request "in window" to the component, so the window
 738                 // should gain focus before.
 739                 requestWindowFocus(CausedFocusEvent.Cause.MOUSE_EVENT);
 740 
 741                 mouseDownTarget[targetIdx] = targetPeer;
 742             } else if (id == MouseEvent.MOUSE_DRAGGED) {
 743                 // Cocoa dragged event has the information about which mouse
 744                 // button is being dragged. Use it to determine the peer that
 745                 // should receive the dragged event.
 746                 targetPeer = mouseDownTarget[targetIdx];
 747                 mouseClickButtons &= ~modifiers;
 748             } else if (id == MouseEvent.MOUSE_RELEASED) {
 749                 // TODO: currently, mouse released event goes to the same component
 750                 // that received corresponding mouse pressed event. For most cases,
 751                 // it's OK, however, we need to make sure that our behavior is consistent
 752                 // with 1.6 for cases where component in question have been
 753                 // hidden/removed in between of mouse pressed/released events.
 754                 targetPeer = mouseDownTarget[targetIdx];
 755 
 756                 if ((modifiers & eventButtonMask) == 0) {
 757                     mouseDownTarget[targetIdx] = null;
 758                 }
 759 
 760                 // mouseClickButtons is updated below, after MOUSE_CLICK is sent
 761             }
 762 
 763             if (targetPeer == null) {
 764                 //TODO This can happen if this window is invisible. this is correct behavior in this case?
 765                 targetPeer = this;
 766             }
 767 
 768 
 769             Point lp = targetPeer.windowToLocal(x, y, this);
 770             if (targetPeer.isEnabled()) {
 771                 MouseEvent event = new MouseEvent(targetPeer.getTarget(), id,
 772                                                   when, modifiers, lp.x, lp.y,
 773                                                   screenX, screenY, clickCount,
 774                                                   popupTrigger, button);
 775                 postEvent(event);
 776             }
 777 
 778             if (id == MouseEvent.MOUSE_RELEASED) {
 779                 if ((mouseClickButtons & eventButtonMask) != 0
 780                     && targetPeer.isEnabled()) {
 781                     postEvent(new MouseEvent(targetPeer.getTarget(),
 782                                              MouseEvent.MOUSE_CLICKED,
 783                                              when, modifiers,
 784                                              lp.x, lp.y, screenX, screenY,
 785                                              clickCount, popupTrigger, button));
 786                 }
 787                 mouseClickButtons &= ~eventButtonMask;
 788             }
 789         }
 790         notifyUpdateCursor();
 791     }
 792 
 793     private void generateMouseEnterExitEventsForComponents(long when,
 794             int button, int x, int y, int screenX, int screenY,
 795             int modifiers, int clickCount, boolean popupTrigger,
 796             LWComponentPeer targetPeer) {
 797 
 798         if (!isMouseOver || targetPeer == lastMouseEventPeer) {
 799             return;
 800         }
 801 
 802         // Generate Mouse Exit for components
 803         if (lastMouseEventPeer != null && lastMouseEventPeer.isEnabled()) {
 804             Point oldp = lastMouseEventPeer.windowToLocal(x, y, this);
 805             postEvent(new MouseEvent(lastMouseEventPeer.getTarget(),
 806                     MouseEvent.MOUSE_EXITED,
 807                     when, modifiers,
 808                     oldp.x, oldp.y, screenX, screenY,
 809                     clickCount, popupTrigger, button));
 810         }
 811         lastCommonMouseEventPeer = targetPeer;
 812         lastMouseEventPeer = targetPeer;
 813 
 814         // Generate Mouse Enter for components
 815         if (targetPeer != null && targetPeer.isEnabled()) {
 816             Point newp = targetPeer.windowToLocal(x, y, this);
 817             postEvent(new MouseEvent(targetPeer.getTarget(),
 818                     MouseEvent.MOUSE_ENTERED,
 819                     when, modifiers,
 820                     newp.x, newp.y, screenX, screenY,
 821                     clickCount, popupTrigger, button));
 822         }
 823     }
 824 
 825     public void dispatchMouseWheelEvent(long when, int x, int y, int modifiers,
 826                                         int scrollType, int scrollAmount,
 827                                         int wheelRotation, double preciseWheelRotation,
 828                                         byte[] bdata)
 829     {
 830         // TODO: could we just use the last mouse event target here?
 831         Rectangle r = getBounds();
 832         // findPeerAt() expects parent coordinates
 833         final LWComponentPeer targetPeer = findPeerAt(r.x + x, r.y + y);
 834         if (targetPeer == null || !targetPeer.isEnabled()) {
 835             return;
 836         }
 837 
 838         Point lp = targetPeer.windowToLocal(x, y, this);
 839         // TODO: fill "bdata" member of AWTEvent
 840         // TODO: screenX/screenY
 841         postEvent(new MouseWheelEvent(targetPeer.getTarget(),
 842                                       MouseEvent.MOUSE_WHEEL,
 843                                       when, modifiers,
 844                                       lp.x, lp.y,
 845                                       0, 0, /* screenX, Y */
 846                                       0 /* clickCount */, false /* popupTrigger */,
 847                                       scrollType, scrollAmount,
 848                                       wheelRotation, preciseWheelRotation));
 849     }
 850 
 851     /*
 852      * Called by the delegate when a key is pressed.
 853      */
 854     public void dispatchKeyEvent(int id, long when, int modifiers,
 855                                  int keyCode, char keyChar, int keyLocation)
 856     {
 857         LWKeyboardFocusManagerPeer kfmPeer = LWKeyboardFocusManagerPeer.getInstance();
 858         Component focusOwner = kfmPeer.getCurrentFocusOwner();
 859 
 860         if (focusOwner == null) {
 861             focusOwner = kfmPeer.getCurrentFocusedWindow();
 862             if (focusOwner == null) {
 863                 focusOwner = this.getTarget();
 864             }
 865         }
 866         postEvent(new KeyEvent(focusOwner, id, when, modifiers, keyCode, keyChar, keyLocation));
 867     }
 868 
 869 
 870     // ---- UTILITY METHODS ---- //
 871 
 872     private void postWindowStateChangedEvent(int newWindowState) {
 873         if (getTarget() instanceof Frame) {
 874             AWTAccessor.getFrameAccessor().setExtendedState(
 875                     (Frame)getTarget(), newWindowState);
 876         }
 877         WindowEvent stateChangedEvent = new WindowEvent(getTarget(),
 878                 WindowEvent.WINDOW_STATE_CHANGED,
 879                 windowState, newWindowState);
 880         postEvent(stateChangedEvent);
 881         windowState = newWindowState;
 882     }
 883 
 884     private static int getGraphicsConfigScreen(GraphicsConfiguration gc) {
 885         // TODO: this method can be implemented in a more
 886         // efficient way by forwarding to the delegate
 887         GraphicsDevice gd = gc.getDevice();
 888         GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
 889         GraphicsDevice[] gds = ge.getScreenDevices();
 890         for (int i = 0; i < gds.length; i++) {
 891             if (gds[i] == gd) {
 892                 return i;
 893             }
 894         }
 895         // Should never happen if gc is a screen device config
 896         return 0;
 897     }
 898 
 899     /*
 900      * This method is called when window's graphics config is changed from
 901      * the app code (e.g. when the window is made non-opaque) or when
 902      * the window is moved to another screen by user.
 903      *
 904      * Returns true if the graphics config has been changed, false otherwise.
 905      */
 906     private boolean setGraphicsConfig(GraphicsConfiguration gc) {
 907         synchronized (getStateLock()) {
 908             if (graphicsConfig == gc) {
 909                 return false;
 910             }
 911             // If window's graphics config is changed from the app code, the
 912             // config correspond to the same device as before; when the window
 913             // is moved by user, graphicsDevice is updated in checkIfOnNewScreen().
 914             // In either case, there's nothing to do with screenOn here
 915             graphicsConfig = gc;
 916         }
 917         // SurfaceData is replaced later in updateGraphicsData()
 918         return true;
 919     }
 920 
 921     private void checkIfOnNewScreen() {
 922         GraphicsDevice newGraphicsDevice = platformWindow.getGraphicsDevice();
 923         synchronized (getStateLock()) {
 924             if (graphicsDevice == newGraphicsDevice) {
 925                 return;
 926             }
 927             graphicsDevice = newGraphicsDevice;
 928         }
 929 
 930         // TODO: DisplayChangedListener stuff
 931         final GraphicsConfiguration newGC = newGraphicsDevice.getDefaultConfiguration();
 932 
 933         if (!setGraphicsConfig(newGC)) return;
 934 
 935         SunToolkit.executeOnEventHandlerThread(getTarget(), new Runnable() {
 936             public void run() {
 937                 AWTAccessor.getComponentAccessor().setGraphicsConfiguration(getTarget(), newGC);
 938             }
 939         });
 940     }
 941 
 942     /*
 943      * May be called by delegate to provide SD to Java2D code.
 944      */
 945     public SurfaceData getSurfaceData() {
 946         synchronized (surfaceDataLock) {
 947             return surfaceData;
 948         }
 949     }
 950 
 951     private void replaceSurfaceData() {
 952         replaceSurfaceData(true);
 953     }
 954 
 955     private void replaceSurfaceData(final boolean blit) {
 956         synchronized (surfaceDataLock) {
 957             final SurfaceData oldData = getSurfaceData();
 958             surfaceData = platformWindow.replaceSurfaceData();
 959             final Rectangle size = getSize();
 960             if (getSurfaceData() != null && oldData != getSurfaceData()) {
 961                 clearBackground(size.width, size.height);
 962             }
 963 
 964             if (blit) {
 965                 blitSurfaceData(oldData, getSurfaceData());
 966             }
 967 
 968             if (oldData != null && oldData != getSurfaceData()) {
 969                 // TODO: drop oldData for D3D/WGL pipelines
 970                 // This can only happen when this peer is being created
 971                 oldData.flush();
 972             }
 973         }
 974     }
 975 
 976     private void blitSurfaceData(final SurfaceData src, final SurfaceData dst) {
 977         //TODO blit. proof-of-concept
 978         if (src != dst && src != null && dst != null
 979             && !(dst instanceof NullSurfaceData)
 980             && !(src instanceof NullSurfaceData)
 981             && src.getSurfaceType().equals(dst.getSurfaceType())) {
 982             final Rectangle size = getSize();
 983             final Blit blit = Blit.locate(src.getSurfaceType(),
 984                                           CompositeType.Src,
 985                                           dst.getSurfaceType());
 986             if (blit != null) {
 987                 blit.Blit(src, dst, AlphaComposite.Src,
 988                           getRegion(), 0, 0, 0, 0, size.width, size.height);
 989             }
 990         }
 991     }
 992 
 993     /*
 994      * Request the window insets from the delegate and compares it
 995      * with the current one. This method is mostly called by the
 996      * delegate, e.g. when the window state is changed and insets
 997      * should be recalculated.
 998      *
 999      * This method may be called on the toolkit thread.
1000      */
1001     public boolean updateInsets(Insets newInsets) {
1002         boolean changed = false;
1003         synchronized (getStateLock()) {
1004             changed = (insets.equals(newInsets));
1005             insets = newInsets;
1006         }
1007 
1008         if (changed) {
1009             replaceSurfaceData();
1010             repaintPeer();
1011         }
1012 
1013         return changed;
1014     }
1015 
1016     public static LWWindowPeer getWindowUnderCursor() {
1017         return lastCommonMouseEventPeer != null ? lastCommonMouseEventPeer.getWindowPeerOrSelf() : null;
1018     }
1019 
1020     public static LWComponentPeer<?, ?> getPeerUnderCursor() {
1021         return lastCommonMouseEventPeer;
1022     }
1023 
1024     /*
1025      * Requests platform to set native focus on a frame/dialog.
1026      * In case of a simple window, triggers appropriate java focus change.
1027      */
1028     public boolean requestWindowFocus(CausedFocusEvent.Cause cause) {
1029         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1030             focusLog.fine("requesting native focus to " + this);
1031         }
1032 
1033         if (!focusAllowedFor()) {
1034             focusLog.fine("focus is not allowed");
1035             return false;
1036         }
1037 
1038         if (platformWindow.rejectFocusRequest(cause)) {
1039             return false;
1040         }
1041 
1042         Window currentActive = KeyboardFocusManager.
1043             getCurrentKeyboardFocusManager().getActiveWindow();
1044 
1045         Window opposite = LWKeyboardFocusManagerPeer.getInstance().
1046             getCurrentFocusedWindow();
1047 
1048         // Make the owner active window.
1049         if (isSimpleWindow()) {
1050             LWWindowPeer owner = getOwnerFrameDialog(this);
1051 
1052             // If owner is not natively active, request native
1053             // activation on it w/o sending events up to java.
1054             if (owner != null && !owner.platformWindow.isActive()) {
1055                 if (focusLog.isLoggable(PlatformLogger.FINE)) {
1056                     focusLog.fine("requesting native focus to the owner " + owner);
1057                 }
1058                 LWWindowPeer currentActivePeer = (currentActive != null ?
1059                     (LWWindowPeer)currentActive.getPeer() : null);
1060 
1061                 // Ensure the opposite is natively active and suppress sending events.
1062                 if (currentActivePeer != null && currentActivePeer.platformWindow.isActive()) {
1063                     if (focusLog.isLoggable(PlatformLogger.FINE)) {
1064                         focusLog.fine("the opposite is " + currentActivePeer);
1065                     }
1066                     currentActivePeer.skipNextFocusChange = true;
1067                 }
1068                 owner.skipNextFocusChange = true;
1069 
1070                 owner.platformWindow.requestWindowFocus();
1071             }
1072 
1073             // DKFM will synthesize all the focus/activation events correctly.
1074             changeFocusedWindow(true, opposite);
1075             return true;
1076 
1077         // In case the toplevel is active but not focused, change focus directly,
1078         // as requesting native focus on it will not have effect.
1079         } else if (getTarget() == currentActive && !getTarget().hasFocus()) {
1080 
1081             changeFocusedWindow(true, opposite);
1082             return true;
1083         }
1084 
1085         return platformWindow.requestWindowFocus();
1086     }
1087 
1088     private boolean focusAllowedFor() {
1089         Window window = getTarget();
1090         // TODO: check if modal blocked
1091         return window.isVisible() && window.isEnabled() && isFocusableWindow();
1092     }
1093 
1094     private boolean isFocusableWindow() {
1095         boolean focusable = getTarget().isFocusableWindow();
1096         if (isSimpleWindow()) {
1097             LWWindowPeer ownerPeer = getOwnerFrameDialog(this);
1098             if (ownerPeer == null) {
1099                 return false;
1100             }
1101             return focusable && ownerPeer.getTarget().isFocusableWindow();
1102         }
1103         return focusable;
1104     }
1105 
1106     public boolean isSimpleWindow() {
1107         Window window = getTarget();
1108         return !(window instanceof Dialog || window instanceof Frame);
1109     }
1110 
1111     /*
1112      * Changes focused window on java level.
1113      */
1114     private void changeFocusedWindow(boolean becomesFocused, Window opposite) {
1115         if (focusLog.isLoggable(PlatformLogger.FINE)) {
1116             focusLog.fine((becomesFocused?"gaining":"loosing") + " focus window: " + this);
1117         }
1118         if (skipNextFocusChange) {
1119             focusLog.fine("skipping focus change");
1120             skipNextFocusChange = false;
1121             return;
1122         }
1123         if (!isFocusableWindow() && becomesFocused) {
1124             focusLog.fine("the window is not focusable");
1125             return;
1126         }
1127         if (becomesFocused) {
1128             synchronized (getPeerTreeLock()) {
1129                 if (blocker != null) {
1130                     if (focusLog.isLoggable(PlatformLogger.FINEST)) {
1131                         focusLog.finest("the window is blocked by " + blocker);
1132                     }
1133                     return;
1134                 }
1135             }
1136         }
1137 
1138         // Note, the method is not called:
1139         // - when the opposite (gaining focus) window is an owned/owner window.
1140         // - for a simple window in any case.
1141         if (!becomesFocused &&
1142             (isGrabbing() || getOwnerFrameDialog(grabbingWindow) == this))
1143         {
1144             focusLog.fine("ungrabbing on " + grabbingWindow);
1145             // ungrab a simple window if its owner looses activation.
1146             grabbingWindow.ungrab();
1147         }
1148 
1149         KeyboardFocusManagerPeer kfmPeer = LWKeyboardFocusManagerPeer.getInstance();
1150         kfmPeer.setCurrentFocusedWindow(becomesFocused ? getTarget() : null);
1151 
1152         int eventID = becomesFocused ? WindowEvent.WINDOW_GAINED_FOCUS : WindowEvent.WINDOW_LOST_FOCUS;
1153         WindowEvent windowEvent = new TimedWindowEvent(getTarget(), eventID, opposite, System.currentTimeMillis());
1154 
1155         // TODO: wrap in SequencedEvent
1156         postEvent(windowEvent);
1157     }
1158 
1159     static LWWindowPeer getOwnerFrameDialog(LWWindowPeer peer) {
1160         Window owner = (peer != null ? peer.getTarget().getOwner() : null);
1161         while (owner != null && !(owner instanceof Frame || owner instanceof Dialog)) {
1162             owner = owner.getOwner();
1163         }
1164         return owner != null ? (LWWindowPeer)owner.getPeer() : null;
1165     }
1166 
1167     /**
1168      * Returns the foremost modal blocker of this window, or null.
1169      */
1170     public LWWindowPeer getBlocker() {
1171         synchronized (getPeerTreeLock()) {
1172             LWWindowPeer blocker = this.blocker;
1173             if (blocker == null) {
1174                 return null;
1175             }
1176             while (blocker.blocker != null) {
1177                 blocker = blocker.blocker;
1178             }
1179             return blocker;
1180         }
1181     }
1182 
1183     public void enterFullScreenMode() {
1184         platformWindow.enterFullScreenMode();
1185     }
1186 
1187     public void exitFullScreenMode() {
1188         platformWindow.exitFullScreenMode();
1189     }
1190 
1191     public long getLayerPtr() {
1192         return getPlatformWindow().getLayerPtr();
1193     }
1194 
1195     void grab() {
1196         if (grabbingWindow != null && !isGrabbing()) {
1197             grabbingWindow.ungrab();
1198         }
1199         grabbingWindow = this;
1200     }
1201 
1202     void ungrab() {
1203         if (isGrabbing()) {
1204             grabbingWindow = null;
1205             postEvent(new UngrabEvent(getTarget()));
1206         }
1207     }
1208 
1209     private boolean isGrabbing() {
1210         return this == grabbingWindow;
1211     }
1212 
1213     @Override
1214     public String toString() {
1215         return super.toString() + " [target is " + getTarget() + "]";
1216     }
1217 }