Source Code Cross Referenced for MotifDnDDropTargetProtocol.java in  » 6.0-JDK-Platform » solaris » sun » awt » X11 » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Platform » solaris » sun.awt.X11 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


0001:        /*
0002:         * Copyright 2003-2007 Sun Microsystems, Inc.  All Rights Reserved.
0003:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0004:         *
0005:         * This code is free software; you can redistribute it and/or modify it
0006:         * under the terms of the GNU General Public License version 2 only, as
0007:         * published by the Free Software Foundation.  Sun designates this
0008:         * particular file as subject to the "Classpath" exception as provided
0009:         * by Sun in the LICENSE file that accompanied this code.
0010:         *
0011:         * This code is distributed in the hope that it will be useful, but WITHOUT
0012:         * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0013:         * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
0014:         * version 2 for more details (a copy is included in the LICENSE file that
0015:         * accompanied this code).
0016:         *
0017:         * You should have received a copy of the GNU General Public License version
0018:         * 2 along with this work; if not, write to the Free Software Foundation,
0019:         * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0020:         *
0021:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
0022:         * CA 95054 USA or visit www.sun.com if you need additional information or
0023:         * have any questions.
0024:         */
0025:
0026:        package sun.awt.X11;
0027:
0028:        import java.awt.Point;
0029:
0030:        import java.awt.dnd.DnDConstants;
0031:
0032:        import java.awt.event.MouseEvent;
0033:
0034:        import java.io.IOException;
0035:
0036:        import sun.misc.Unsafe;
0037:
0038:        /**
0039:         * XDropTargetProtocol implementation for Motif DnD protocol.
0040:         *
0041:         * @since 1.5
0042:         */
0043:        class MotifDnDDropTargetProtocol extends XDropTargetProtocol {
0044:            private static final Unsafe unsafe = XlibWrapper.unsafe;
0045:
0046:            private long sourceWindow = 0;
0047:            private long sourceWindowMask = 0;
0048:            private int sourceProtocolVersion = 0;
0049:            private int sourceActions = DnDConstants.ACTION_NONE;
0050:            private long[] sourceFormats = null;
0051:            private long sourceAtom = 0;
0052:            private int userAction = DnDConstants.ACTION_NONE;
0053:            private int sourceX = 0;
0054:            private int sourceY = 0;
0055:            private XWindow targetXWindow = null;
0056:            private boolean topLevelLeavePostponed = false;
0057:
0058:            protected MotifDnDDropTargetProtocol(
0059:                    XDropTargetProtocolListener listener) {
0060:                super (listener);
0061:            }
0062:
0063:            /**
0064:             * Creates an instance associated with the specified listener.
0065:             *
0066:             * @throws NullPointerException if listener is <code>null</code>.
0067:             */
0068:            static XDropTargetProtocol createInstance(
0069:                    XDropTargetProtocolListener listener) {
0070:                return new MotifDnDDropTargetProtocol(listener);
0071:            }
0072:
0073:            public String getProtocolName() {
0074:                return XDragAndDropProtocols.MotifDnD;
0075:            }
0076:
0077:            public void registerDropTarget(long window) {
0078:                assert XToolkit.isAWTLockHeldByCurrentThread();
0079:
0080:                MotifDnDConstants.writeDragReceiverInfoStruct(window);
0081:            }
0082:
0083:            public void unregisterDropTarget(long window) {
0084:                assert XToolkit.isAWTLockHeldByCurrentThread();
0085:
0086:                MotifDnDConstants.XA_MOTIF_ATOM_0.DeleteProperty(window);
0087:            }
0088:
0089:            public void registerEmbedderDropSite(long embedder) {
0090:                assert XToolkit.isAWTLockHeldByCurrentThread();
0091:
0092:                boolean overriden = false;
0093:                int version = 0;
0094:                long proxy = 0;
0095:                long newProxy = XDropTargetRegistry.getDnDProxyWindow();
0096:                int status = 0;
0097:                long data = 0;
0098:                int dataSize = MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE;
0099:
0100:                WindowPropertyGetter wpg = new WindowPropertyGetter(embedder,
0101:                        MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO, 0,
0102:                        0xFFFF, false, XlibWrapper.AnyPropertyType);
0103:
0104:                try {
0105:                    status = wpg.execute(XToolkit.IgnoreBadWindowHandler);
0106:
0107:                    /*
0108:                     * DragICCI.h:
0109:                     *
0110:                     * typedef struct _xmDragReceiverInfoStruct{
0111:                     *     BYTE	byte_order;
0112:                     *     BYTE	protocol_version;
0113:                     *     BYTE	drag_protocol_style;
0114:                     *     BYTE	pad1;
0115:                     *     CARD32	proxy_window B32;
0116:                     *     CARD16	num_drop_sites B16;
0117:                     *     CARD16	pad2 B16;
0118:                     *     CARD32	heap_offset B32;
0119:                     * } xmDragReceiverInfoStruct;
0120:                     */
0121:                    if (status == (int) XlibWrapper.Success
0122:                            && wpg.getData() != 0
0123:                            && wpg.getActualType() != 0
0124:                            && wpg.getActualFormat() == 8
0125:                            && wpg.getNumberOfItems() >= MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE) {
0126:
0127:                        overriden = true;
0128:                        data = wpg.getData();
0129:                        dataSize = wpg.getNumberOfItems();
0130:
0131:                        byte byteOrderByte = unsafe.getByte(data);
0132:
0133:                        {
0134:                            int tproxy = unsafe.getInt(data + 4);
0135:                            if (byteOrderByte != MotifDnDConstants
0136:                                    .getByteOrderByte()) {
0137:                                tproxy = MotifDnDConstants.Swapper.swap(tproxy);
0138:                            }
0139:                            proxy = tproxy;
0140:                        }
0141:
0142:                        if (proxy == newProxy) {
0143:                            // Embedder already registered.
0144:                            return;
0145:                        }
0146:
0147:                        {
0148:                            int tproxy = (int) newProxy;
0149:                            if (byteOrderByte != MotifDnDConstants
0150:                                    .getByteOrderByte()) {
0151:                                tproxy = MotifDnDConstants.Swapper.swap(tproxy);
0152:                            }
0153:                            unsafe.putInt(data + 4, tproxy);
0154:                        }
0155:                    } else {
0156:                        data = unsafe.allocateMemory(dataSize);
0157:
0158:                        unsafe.putByte(data, MotifDnDConstants
0159:                                .getByteOrderByte()); /* byte order */
0160:                        unsafe.putByte(data + 1,
0161:                                MotifDnDConstants.MOTIF_DND_PROTOCOL_VERSION); /* protocol version */
0162:                        unsafe.putByte(data + 2,
0163:                                (byte) MotifDnDConstants.MOTIF_DYNAMIC_STYLE); /* protocol style */
0164:                        unsafe.putByte(data + 3, (byte) 0); /* pad */
0165:                        unsafe.putInt(data + 4, (int) newProxy); /* proxy window */
0166:                        unsafe.putShort(data + 8, (short) 0); /* num_drop_sites */
0167:                        unsafe.putShort(data + 10, (short) 0); /* pad */
0168:                        unsafe.putInt(data + 12, dataSize);
0169:                    }
0170:
0171:                    XToolkit
0172:                            .WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler);
0173:                    XlibWrapper.XChangeProperty(XToolkit.getDisplay(),
0174:                            embedder,
0175:                            MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO
0176:                                    .getAtom(),
0177:                            MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO
0178:                                    .getAtom(), 8, XlibWrapper.PropModeReplace,
0179:                            data, dataSize);
0180:                    XToolkit.RESTORE_XERROR_HANDLER();
0181:
0182:                    if (XToolkit.saved_error != null
0183:                            && XToolkit.saved_error.get_error_code() != XlibWrapper.Success) {
0184:                        throw new XException(
0185:                                "Cannot write Motif receiver info property");
0186:                    }
0187:                } finally {
0188:                    if (!overriden) {
0189:                        unsafe.freeMemory(data);
0190:                        data = 0;
0191:                    }
0192:                    wpg.dispose();
0193:                }
0194:
0195:                putEmbedderRegistryEntry(embedder, overriden, version, proxy);
0196:            }
0197:
0198:            public void unregisterEmbedderDropSite(long embedder) {
0199:                assert XToolkit.isAWTLockHeldByCurrentThread();
0200:
0201:                EmbedderRegistryEntry entry = getEmbedderRegistryEntry(embedder);
0202:
0203:                if (entry == null) {
0204:                    return;
0205:                }
0206:
0207:                if (entry.isOverriden()) {
0208:                    int status = 0;
0209:
0210:                    WindowPropertyGetter wpg = new WindowPropertyGetter(
0211:                            embedder,
0212:                            MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO, 0,
0213:                            0xFFFF, false, XlibWrapper.AnyPropertyType);
0214:
0215:                    try {
0216:                        status = wpg.execute(XToolkit.IgnoreBadWindowHandler);
0217:
0218:                        /*
0219:                         * DragICCI.h:
0220:                         *
0221:                         * typedef struct _xmDragReceiverInfoStruct{
0222:                         *     BYTE	byte_order;
0223:                         *     BYTE	protocol_version;
0224:                         *     BYTE	drag_protocol_style;
0225:                         *     BYTE	pad1;
0226:                         *     CARD32	proxy_window B32;
0227:                         *     CARD16	num_drop_sites B16;
0228:                         *     CARD16	pad2 B16;
0229:                         *     CARD32	heap_offset B32;
0230:                         * } xmDragReceiverInfoStruct;
0231:                         */
0232:                        if (status == (int) XlibWrapper.Success
0233:                                && wpg.getData() != 0
0234:                                && wpg.getActualType() != 0
0235:                                && wpg.getActualFormat() == 8
0236:                                && wpg.getNumberOfItems() >= MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE) {
0237:
0238:                            int dataSize = MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE;
0239:                            long data = wpg.getData();
0240:                            byte byteOrderByte = unsafe.getByte(data);
0241:
0242:                            int tproxy = (int) entry.getProxy();
0243:                            if (MotifDnDConstants.getByteOrderByte() != byteOrderByte) {
0244:                                tproxy = MotifDnDConstants.Swapper.swap(tproxy);
0245:                            }
0246:
0247:                            unsafe.putInt(data + 4, tproxy);
0248:
0249:                            XToolkit
0250:                                    .WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler);
0251:                            XlibWrapper
0252:                                    .XChangeProperty(
0253:                                            XToolkit.getDisplay(),
0254:                                            embedder,
0255:                                            MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO
0256:                                                    .getAtom(),
0257:                                            MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO
0258:                                                    .getAtom(), 8,
0259:                                            XlibWrapper.PropModeReplace, data,
0260:                                            dataSize);
0261:                            XToolkit.RESTORE_XERROR_HANDLER();
0262:
0263:                            if (XToolkit.saved_error != null
0264:                                    && XToolkit.saved_error.get_error_code() != XlibWrapper.Success) {
0265:                                throw new XException(
0266:                                        "Cannot write Motif receiver info property");
0267:                            }
0268:                        }
0269:                    } finally {
0270:                        wpg.dispose();
0271:                    }
0272:                } else {
0273:                    MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO
0274:                            .DeleteProperty(embedder);
0275:                }
0276:            }
0277:
0278:            /*
0279:             * Gets and stores in the registry the embedder's Motif DnD drop site info
0280:             * from the embedded.
0281:             */
0282:            public void registerEmbeddedDropSite(long embedded) {
0283:                assert XToolkit.isAWTLockHeldByCurrentThread();
0284:
0285:                boolean overriden = false;
0286:                int version = 0;
0287:                long proxy = 0;
0288:                int status = 0;
0289:
0290:                WindowPropertyGetter wpg = new WindowPropertyGetter(embedded,
0291:                        MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO, 0,
0292:                        0xFFFF, false, XlibWrapper.AnyPropertyType);
0293:
0294:                try {
0295:                    status = wpg.execute(XToolkit.IgnoreBadWindowHandler);
0296:
0297:                    /*
0298:                     * DragICCI.h:
0299:                     *
0300:                     * typedef struct _xmDragReceiverInfoStruct{
0301:                     *     BYTE	byte_order;
0302:                     *     BYTE	protocol_version;
0303:                     *     BYTE	drag_protocol_style;
0304:                     *     BYTE	pad1;
0305:                     *     CARD32	proxy_window B32;
0306:                     *     CARD16	num_drop_sites B16;
0307:                     *     CARD16	pad2 B16;
0308:                     *     CARD32	heap_offset B32;
0309:                     * } xmDragReceiverInfoStruct;
0310:                     */
0311:                    if (status == (int) XlibWrapper.Success
0312:                            && wpg.getData() != 0
0313:                            && wpg.getActualType() != 0
0314:                            && wpg.getActualFormat() == 8
0315:                            && wpg.getNumberOfItems() >= MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE) {
0316:
0317:                        overriden = true;
0318:                        long data = wpg.getData();
0319:
0320:                        byte byteOrderByte = unsafe.getByte(data);
0321:
0322:                        {
0323:                            int tproxy = unsafe.getInt(data + 4);
0324:                            if (byteOrderByte != MotifDnDConstants
0325:                                    .getByteOrderByte()) {
0326:                                tproxy = MotifDnDConstants.Swapper.swap(tproxy);
0327:                            }
0328:                            proxy = tproxy;
0329:                        }
0330:                    }
0331:                } finally {
0332:                    wpg.dispose();
0333:                }
0334:
0335:                putEmbedderRegistryEntry(embedded, overriden, version, proxy);
0336:            }
0337:
0338:            public boolean isProtocolSupported(long window) {
0339:                WindowPropertyGetter wpg = new WindowPropertyGetter(window,
0340:                        MotifDnDConstants.XA_MOTIF_DRAG_RECEIVER_INFO, 0,
0341:                        0xFFFF, false, XlibWrapper.AnyPropertyType);
0342:
0343:                try {
0344:                    int status = wpg.execute(XToolkit.IgnoreBadWindowHandler);
0345:
0346:                    if (status == (int) XlibWrapper.Success
0347:                            && wpg.getData() != 0
0348:                            && wpg.getActualType() != 0
0349:                            && wpg.getActualFormat() == 8
0350:                            && wpg.getNumberOfItems() >= MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE) {
0351:                        return true;
0352:                    } else {
0353:                        return false;
0354:                    }
0355:                } finally {
0356:                    wpg.dispose();
0357:                }
0358:            }
0359:
0360:            private boolean processTopLevelEnter(XClientMessageEvent xclient) {
0361:                assert XToolkit.isAWTLockHeldByCurrentThread();
0362:
0363:                if (targetXWindow != null || sourceWindow != 0) {
0364:                    return false;
0365:                }
0366:
0367:                if (!(XToolkit.windowToXWindow(xclient.get_window()) instanceof  XWindow)
0368:                        && getEmbedderRegistryEntry(xclient.get_window()) == null) {
0369:                    return false;
0370:                }
0371:
0372:                long source_win = 0;
0373:                long source_win_mask = 0;
0374:                int protocol_version = 0;
0375:                long property_atom = 0;
0376:                long[] formats = null;
0377:
0378:                {
0379:                    long data = xclient.get_data();
0380:                    byte eventByteOrder = unsafe.getByte(data + 1);
0381:                    source_win = MotifDnDConstants.Swapper.getInt(data + 8,
0382:                            eventByteOrder);
0383:                    property_atom = MotifDnDConstants.Swapper.getInt(data + 12,
0384:                            eventByteOrder);
0385:                }
0386:
0387:                /* Extract the available data types. */
0388:                {
0389:                    WindowPropertyGetter wpg = new WindowPropertyGetter(
0390:                            source_win, XAtom.get(property_atom), 0, 0xFFFF,
0391:                            false,
0392:                            MotifDnDConstants.XA_MOTIF_DRAG_INITIATOR_INFO
0393:                                    .getAtom());
0394:
0395:                    try {
0396:                        int status = wpg
0397:                                .execute(XToolkit.IgnoreBadWindowHandler);
0398:
0399:                        if (status == XlibWrapper.Success
0400:                                && wpg.getData() != 0
0401:                                && wpg.getActualType() == MotifDnDConstants.XA_MOTIF_DRAG_INITIATOR_INFO
0402:                                        .getAtom()
0403:                                && wpg.getActualFormat() == 8
0404:                                && wpg.getNumberOfItems() == MotifDnDConstants.MOTIF_INITIATOR_INFO_SIZE) {
0405:
0406:                            long data = wpg.getData();
0407:                            byte propertyByteOrder = unsafe.getByte(data);
0408:
0409:                            protocol_version = unsafe.getByte(data + 1);
0410:
0411:                            if (protocol_version != MotifDnDConstants.MOTIF_DND_PROTOCOL_VERSION) {
0412:                                return false;
0413:                            }
0414:
0415:                            int index = MotifDnDConstants.Swapper.getShort(
0416:                                    data + 2, propertyByteOrder);
0417:
0418:                            formats = MotifDnDConstants
0419:                                    .getTargetListForIndex(index);
0420:                        } else {
0421:                            formats = new long[0];
0422:                        }
0423:                    } finally {
0424:                        wpg.dispose();
0425:                    }
0426:                }
0427:
0428:                /* 
0429:                 * Select for StructureNotifyMask to receive DestroyNotify in case of source
0430:                 * crash.
0431:                 */
0432:                XWindowAttributes wattr = new XWindowAttributes();
0433:                try {
0434:                    XToolkit
0435:                            .WITH_XERROR_HANDLER(XToolkit.IgnoreBadWindowHandler);
0436:                    int status = XlibWrapper.XGetWindowAttributes(XToolkit
0437:                            .getDisplay(), source_win, wattr.pData);
0438:
0439:                    XToolkit.RESTORE_XERROR_HANDLER();
0440:
0441:                    if (status == 0
0442:                            || (XToolkit.saved_error != null && XToolkit.saved_error
0443:                                    .get_error_code() != XlibWrapper.Success)) {
0444:                        throw new XException("XGetWindowAttributes failed");
0445:                    }
0446:
0447:                    source_win_mask = wattr.get_your_event_mask();
0448:                } finally {
0449:                    wattr.dispose();
0450:                }
0451:
0452:                XToolkit.WITH_XERROR_HANDLER(XToolkit.IgnoreBadWindowHandler);
0453:                XlibWrapper.XSelectInput(XToolkit.getDisplay(), source_win,
0454:                        source_win_mask | XlibWrapper.StructureNotifyMask);
0455:
0456:                XToolkit.RESTORE_XERROR_HANDLER();
0457:
0458:                if (XToolkit.saved_error != null
0459:                        && XToolkit.saved_error.get_error_code() != XlibWrapper.Success) {
0460:                    throw new XException("XSelectInput failed");
0461:                }
0462:
0463:                sourceWindow = source_win;
0464:                sourceWindowMask = source_win_mask;
0465:                sourceProtocolVersion = protocol_version;
0466:                /* 
0467:                 * TOP_LEVEL_ENTER doesn't communicate the list of supported actions 
0468:                 * They are provided in DRAG_MOTION.
0469:                 */
0470:                sourceActions = DnDConstants.ACTION_NONE;
0471:                sourceFormats = formats;
0472:                sourceAtom = property_atom;
0473:
0474:                return true;
0475:            }
0476:
0477:            private boolean processDragMotion(XClientMessageEvent xclient) {
0478:                long data = xclient.get_data();
0479:                byte eventByteOrder = unsafe.getByte(data + 1);
0480:                byte eventReason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0481:                int x = 0;
0482:                int y = 0;
0483:
0484:                short flags = MotifDnDConstants.Swapper.getShort(data + 2,
0485:                        eventByteOrder);
0486:
0487:                int motif_action = (flags & MotifDnDConstants.MOTIF_DND_ACTION_MASK) >> MotifDnDConstants.MOTIF_DND_ACTION_SHIFT;
0488:                int motif_actions = (flags & MotifDnDConstants.MOTIF_DND_ACTIONS_MASK) >> MotifDnDConstants.MOTIF_DND_ACTIONS_SHIFT;
0489:
0490:                int java_action = MotifDnDConstants
0491:                        .getJavaActionsForMotifActions(motif_action);
0492:                int java_actions = MotifDnDConstants
0493:                        .getJavaActionsForMotifActions(motif_actions);
0494:
0495:                /* Append source window id to the event data, so that we can send the
0496:                   response properly. */
0497:                {
0498:                    int win = (int) sourceWindow;
0499:                    if (eventByteOrder != MotifDnDConstants.getByteOrderByte()) {
0500:                        win = MotifDnDConstants.Swapper.swap(win);
0501:                    }
0502:                    unsafe.putInt(data + 12, win);
0503:                }
0504:
0505:                XWindow xwindow = null;
0506:                {
0507:                    XBaseWindow xbasewindow = XToolkit.windowToXWindow(xclient
0508:                            .get_window());
0509:                    if (xbasewindow instanceof  XWindow) {
0510:                        xwindow = (XWindow) xbasewindow;
0511:                    }
0512:                }
0513:
0514:                if (eventReason == MotifDnDConstants.OPERATION_CHANGED) {
0515:                    /* OPERATION_CHANGED event doesn't provide coordinates, so we use
0516:                       previously stored position and component ref. */
0517:                    x = sourceX;
0518:                    y = sourceY;
0519:
0520:                    if (xwindow == null) {
0521:                        xwindow = targetXWindow;
0522:                    }
0523:                } else {
0524:                    x = MotifDnDConstants.Swapper.getShort(data + 8,
0525:                            eventByteOrder);
0526:                    y = MotifDnDConstants.Swapper.getShort(data + 10,
0527:                            eventByteOrder);
0528:
0529:                    if (xwindow == null) {
0530:                        long receiver = XDropTargetRegistry
0531:                                .getRegistry()
0532:                                .getEmbeddedDropSite(xclient.get_window(), x, y);
0533:
0534:                        if (receiver != 0) {
0535:                            XBaseWindow xbasewindow = XToolkit
0536:                                    .windowToXWindow(receiver);
0537:                            if (xbasewindow instanceof  XWindow) {
0538:                                xwindow = (XWindow) xbasewindow;
0539:                            }
0540:                        }
0541:                    }
0542:
0543:                    if (xwindow != null) {
0544:                        Point p = xwindow.toLocal(x, y);
0545:                        x = p.x;
0546:                        y = p.y;
0547:                    }
0548:                }
0549:
0550:                if (xwindow == null) {
0551:                    if (targetXWindow != null) {
0552:                        notifyProtocolListener(targetXWindow, x, y,
0553:                                DnDConstants.ACTION_NONE, java_actions,
0554:                                xclient, MouseEvent.MOUSE_EXITED);
0555:                    }
0556:                } else {
0557:                    int java_event_id = 0;
0558:
0559:                    if (targetXWindow == null) {
0560:                        java_event_id = MouseEvent.MOUSE_ENTERED;
0561:                    } else {
0562:                        java_event_id = MouseEvent.MOUSE_DRAGGED;
0563:                    }
0564:
0565:                    notifyProtocolListener(xwindow, x, y, java_action,
0566:                            java_actions, xclient, java_event_id);
0567:                }
0568:
0569:                sourceActions = java_actions;
0570:                userAction = java_action;
0571:                sourceX = x;
0572:                sourceY = y;
0573:                targetXWindow = xwindow;
0574:
0575:                return true;
0576:            }
0577:
0578:            private boolean processTopLevelLeave(XClientMessageEvent xclient) {
0579:                assert XToolkit.isAWTLockHeldByCurrentThread();
0580:
0581:                long data = xclient.get_data();
0582:                byte eventByteOrder = unsafe.getByte(data + 1);
0583:
0584:                long source_win = MotifDnDConstants.Swapper.getInt(data + 8,
0585:                        eventByteOrder);
0586:
0587:                /* Ignore Motif DnD messages from all other windows. */
0588:                if (source_win != sourceWindow) {
0589:                    return false;
0590:                }
0591:
0592:                /*
0593:                 * Postpone upcall to java, so that we can abort it in case
0594:                 * if drop immediatelly follows (see BugTraq ID 4395290).
0595:                 * Send a dummy ClientMessage event to guarantee that a postponed java
0596:                 * upcall will be processed. 
0597:                 */
0598:                topLevelLeavePostponed = true;
0599:                {
0600:                    long proxy;
0601:
0602:                    /*
0603:                     * If this is an embedded drop site, the event should go to the
0604:                     * awt_root_window as this is a proxy for all embedded drop sites.
0605:                     * Otherwise the event should go to the event->window, as we don't use
0606:                     * proxies for normal drop sites.  
0607:                     */
0608:                    if (getEmbedderRegistryEntry(xclient.get_window()) != null) {
0609:                        proxy = XDropTargetRegistry.getDnDProxyWindow();
0610:                    } else {
0611:                        proxy = xclient.get_window();
0612:                    }
0613:
0614:                    XClientMessageEvent dummy = new XClientMessageEvent();
0615:
0616:                    try {
0617:                        dummy.set_type(XlibWrapper.ClientMessage);
0618:                        dummy.set_window(xclient.get_window());
0619:                        dummy.set_format(32);
0620:                        dummy.set_message_type(0);
0621:                        dummy.set_data(0, 0);
0622:                        dummy.set_data(1, 0);
0623:                        dummy.set_data(2, 0);
0624:                        dummy.set_data(3, 0);
0625:                        dummy.set_data(4, 0);
0626:                        XlibWrapper.XSendEvent(XToolkit.getDisplay(), proxy,
0627:                                false, XlibWrapper.NoEventMask, dummy.pData);
0628:                    } finally {
0629:                        dummy.dispose();
0630:                    }
0631:                }
0632:                return true;
0633:            }
0634:
0635:            private boolean processDropStart(XClientMessageEvent xclient) {
0636:                long data = xclient.get_data();
0637:                byte eventByteOrder = unsafe.getByte(data + 1);
0638:
0639:                long source_win = MotifDnDConstants.Swapper.getInt(data + 16,
0640:                        eventByteOrder);
0641:
0642:                /* Ignore Motif DnD messages from all other windows. */
0643:                if (source_win != sourceWindow) {
0644:                    return false;
0645:                }
0646:
0647:                long property_atom = MotifDnDConstants.Swapper.getInt(
0648:                        data + 12, eventByteOrder);
0649:
0650:                short flags = MotifDnDConstants.Swapper.getShort(data + 2,
0651:                        eventByteOrder);
0652:
0653:                int motif_action = (flags & MotifDnDConstants.MOTIF_DND_ACTION_MASK) >> MotifDnDConstants.MOTIF_DND_ACTION_SHIFT;
0654:                int motif_actions = (flags & MotifDnDConstants.MOTIF_DND_ACTIONS_MASK) >> MotifDnDConstants.MOTIF_DND_ACTIONS_SHIFT;
0655:
0656:                int java_action = MotifDnDConstants
0657:                        .getJavaActionsForMotifActions(motif_action);
0658:                int java_actions = MotifDnDConstants
0659:                        .getJavaActionsForMotifActions(motif_actions);
0660:
0661:                int x = MotifDnDConstants.Swapper.getShort(data + 8,
0662:                        eventByteOrder);
0663:                int y = MotifDnDConstants.Swapper.getShort(data + 10,
0664:                        eventByteOrder);
0665:
0666:                XWindow xwindow = null;
0667:                {
0668:                    XBaseWindow xbasewindow = XToolkit.windowToXWindow(xclient
0669:                            .get_window());
0670:                    if (xbasewindow instanceof  XWindow) {
0671:                        xwindow = (XWindow) xbasewindow;
0672:                    }
0673:                }
0674:
0675:                if (xwindow == null) {
0676:                    long receiver = XDropTargetRegistry.getRegistry()
0677:                            .getEmbeddedDropSite(xclient.get_window(), x, y);
0678:
0679:                    if (receiver != 0) {
0680:                        XBaseWindow xbasewindow = XToolkit
0681:                                .windowToXWindow(receiver);
0682:                        if (xbasewindow instanceof  XWindow) {
0683:                            xwindow = (XWindow) xbasewindow;
0684:                        }
0685:                    }
0686:                }
0687:
0688:                if (xwindow != null) {
0689:                    Point p = xwindow.toLocal(x, y);
0690:                    x = p.x;
0691:                    y = p.y;
0692:                }
0693:
0694:                if (xwindow != null) {
0695:                    notifyProtocolListener(xwindow, x, y, java_action,
0696:                            java_actions, xclient, MouseEvent.MOUSE_RELEASED);
0697:                } else if (targetXWindow != null) {
0698:                    notifyProtocolListener(targetXWindow, x, y,
0699:                            DnDConstants.ACTION_NONE, java_actions, xclient,
0700:                            MouseEvent.MOUSE_EXITED);
0701:                }
0702:
0703:                return true;
0704:            }
0705:
0706:            public int getMessageType(XClientMessageEvent xclient) {
0707:                if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0708:                        .getAtom()) {
0709:
0710:                    return UNKNOWN_MESSAGE;
0711:                }
0712:
0713:                long data = xclient.get_data();
0714:                byte reason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0715:
0716:                switch (reason) {
0717:                case MotifDnDConstants.TOP_LEVEL_ENTER:
0718:                    return ENTER_MESSAGE;
0719:                case MotifDnDConstants.DRAG_MOTION:
0720:                case MotifDnDConstants.OPERATION_CHANGED:
0721:                    return MOTION_MESSAGE;
0722:                case MotifDnDConstants.TOP_LEVEL_LEAVE:
0723:                    return LEAVE_MESSAGE;
0724:                case MotifDnDConstants.DROP_START:
0725:                    return DROP_MESSAGE;
0726:                default:
0727:                    return UNKNOWN_MESSAGE;
0728:                }
0729:            }
0730:
0731:            protected boolean processClientMessageImpl(
0732:                    XClientMessageEvent xclient) {
0733:                if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0734:                        .getAtom()) {
0735:                    if (topLevelLeavePostponed) {
0736:                        topLevelLeavePostponed = false;
0737:                        cleanup();
0738:                    }
0739:
0740:                    return false;
0741:                }
0742:
0743:                long data = xclient.get_data();
0744:                byte reason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0745:                byte origin = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_SENDER_MASK);
0746:
0747:                if (topLevelLeavePostponed) {
0748:                    topLevelLeavePostponed = false;
0749:                    if (reason != MotifDnDConstants.DROP_START) {
0750:                        cleanup();
0751:                    }
0752:                }
0753:
0754:                /* Only initiator messages should be handled. */
0755:                if (origin != MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR) {
0756:                    return false;
0757:                }
0758:
0759:                switch (reason) {
0760:                case MotifDnDConstants.TOP_LEVEL_ENTER:
0761:                    return processTopLevelEnter(xclient);
0762:                case MotifDnDConstants.DRAG_MOTION:
0763:                case MotifDnDConstants.OPERATION_CHANGED:
0764:                    return processDragMotion(xclient);
0765:                case MotifDnDConstants.TOP_LEVEL_LEAVE:
0766:                    return processTopLevelLeave(xclient);
0767:                case MotifDnDConstants.DROP_START:
0768:                    return processDropStart(xclient);
0769:                default:
0770:                    return false;
0771:                }
0772:            }
0773:
0774:            /*
0775:             * Currently we don't synthesize enter/leave messages for Motif DnD
0776:             * protocol. See comments in XDropTargetProtocol.postProcessClientMessage.
0777:             */
0778:            protected void sendEnterMessageToToplevel(long win,
0779:                    XClientMessageEvent xclient) {
0780:                throw new Error("UNIMPLEMENTED");
0781:            }
0782:
0783:            protected void sendLeaveMessageToToplevel(long win,
0784:                    XClientMessageEvent xclient) {
0785:                throw new Error("UNIMPLEMENTED");
0786:            }
0787:
0788:            public boolean forwardEventToEmbedded(long embedded, long ctxt,
0789:                    int eventID) {
0790:                // UNIMPLEMENTED.
0791:                return false;
0792:            }
0793:
0794:            public boolean isXEmbedSupported() {
0795:                return false;
0796:            }
0797:
0798:            public boolean sendResponse(long ctxt, int eventID, int action) {
0799:                XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
0800:                if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0801:                        .getAtom()) {
0802:                    return false;
0803:                }
0804:
0805:                long data = xclient.get_data();
0806:                byte reason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0807:                byte origin = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_SENDER_MASK);
0808:                byte eventByteOrder = unsafe.getByte(data + 1);
0809:                byte response_reason = (byte) 0;
0810:
0811:                /* Only initiator messages should be handled. */
0812:                if (origin != MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR) {
0813:                    return false;
0814:                }
0815:
0816:                switch (reason) {
0817:                case MotifDnDConstants.TOP_LEVEL_ENTER:
0818:                case MotifDnDConstants.TOP_LEVEL_LEAVE:
0819:                    /* Receiver shouldn't rely to these messages. */
0820:                    return false;
0821:                case MotifDnDConstants.DRAG_MOTION:
0822:                    switch (eventID) {
0823:                    case MouseEvent.MOUSE_ENTERED:
0824:                        response_reason = MotifDnDConstants.DROP_SITE_ENTER;
0825:                        break;
0826:                    case MouseEvent.MOUSE_DRAGGED:
0827:                        response_reason = MotifDnDConstants.DRAG_MOTION;
0828:                        break;
0829:                    case MouseEvent.MOUSE_EXITED:
0830:                        response_reason = MotifDnDConstants.DROP_SITE_LEAVE;
0831:                        break;
0832:                    }
0833:                    break;
0834:                case MotifDnDConstants.OPERATION_CHANGED:
0835:                case MotifDnDConstants.DROP_START:
0836:                    response_reason = reason;
0837:                    break;
0838:                default:
0839:                    // Unknown reason. Shouldn't get here.
0840:                    assert false;
0841:                }
0842:
0843:                XClientMessageEvent msg = new XClientMessageEvent();
0844:
0845:                try {
0846:                    msg.set_type(XlibWrapper.ClientMessage);
0847:                    msg.set_window(MotifDnDConstants.Swapper.getInt(data + 12,
0848:                            eventByteOrder));
0849:                    msg.set_format(8);
0850:                    msg
0851:                            .set_message_type(MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0852:                                    .getAtom());
0853:
0854:                    long responseData = msg.get_data();
0855:
0856:                    unsafe
0857:                            .putByte(
0858:                                    responseData,
0859:                                    (byte) (response_reason | MotifDnDConstants.MOTIF_MESSAGE_FROM_RECEIVER));
0860:                    unsafe.putByte(responseData + 1, MotifDnDConstants
0861:                            .getByteOrderByte());
0862:
0863:                    int response_flags = 0;
0864:
0865:                    if (response_reason != MotifDnDConstants.DROP_SITE_LEAVE) {
0866:                        short flags = MotifDnDConstants.Swapper.getShort(
0867:                                data + 2, eventByteOrder);
0868:                        byte dropSiteStatus = (action == DnDConstants.ACTION_NONE) ? MotifDnDConstants.MOTIF_INVALID_DROP_SITE
0869:                                : MotifDnDConstants.MOTIF_VALID_DROP_SITE;
0870:
0871:                        /* Clear action and drop site status bits. */
0872:                        response_flags = flags
0873:                                & ~MotifDnDConstants.MOTIF_DND_ACTION_MASK
0874:                                & ~MotifDnDConstants.MOTIF_DND_STATUS_MASK;
0875:                        /* Fill in new action and drop site status. */
0876:                        response_flags |= MotifDnDConstants
0877:                                .getMotifActionsForJavaActions(action) << MotifDnDConstants.MOTIF_DND_ACTION_SHIFT;
0878:                        response_flags |= dropSiteStatus << MotifDnDConstants.MOTIF_DND_STATUS_SHIFT;
0879:                    } else {
0880:                        response_flags = 0;
0881:                    }
0882:
0883:                    unsafe.putShort(responseData + 2, (short) response_flags);
0884:
0885:                    /* Write time stamp. */
0886:                    int time = MotifDnDConstants.Swapper.getInt(data + 4,
0887:                            eventByteOrder);
0888:                    unsafe.putInt(responseData + 4, time);
0889:
0890:                    /* Write coordinates. */
0891:                    if (response_reason != MotifDnDConstants.DROP_SITE_LEAVE) {
0892:                        short x = MotifDnDConstants.Swapper.getShort(data + 8,
0893:                                eventByteOrder);
0894:                        short y = MotifDnDConstants.Swapper.getShort(data + 10,
0895:                                eventByteOrder);
0896:                        unsafe.putShort(responseData + 8, x); // x
0897:                        unsafe.putShort(responseData + 10, y); // y
0898:                    } else {
0899:                        unsafe.putShort(responseData + 8, (short) 0); // x
0900:                        unsafe.putShort(responseData + 10, (short) 0); // y
0901:                    }
0902:
0903:                    XToolkit.awtLock();
0904:                    try {
0905:                        XlibWrapper.XSendEvent(XToolkit.getDisplay(), msg
0906:                                .get_window(), false, XlibWrapper.NoEventMask,
0907:                                msg.pData);
0908:                    } finally {
0909:                        XToolkit.awtUnlock();
0910:                    }
0911:                } finally {
0912:                    msg.dispose();
0913:                }
0914:
0915:                return true;
0916:            }
0917:
0918:            public Object getData(long ctxt, long format)
0919:                    throws IllegalArgumentException, IOException {
0920:                XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
0921:
0922:                if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0923:                        .getAtom()) {
0924:                    throw new IllegalArgumentException();
0925:                }
0926:
0927:                long data = xclient.get_data();
0928:                byte reason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0929:                byte origin = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_SENDER_MASK);
0930:                byte eventByteOrder = unsafe.getByte(data + 1);
0931:
0932:                if (origin != MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR) {
0933:                    throw new IOException("Cannot get data: corrupted context");
0934:                }
0935:
0936:                long selatom = 0;
0937:
0938:                switch (reason) {
0939:                case MotifDnDConstants.DRAG_MOTION:
0940:                case MotifDnDConstants.OPERATION_CHANGED:
0941:                    selatom = sourceAtom;
0942:                    break;
0943:                case MotifDnDConstants.DROP_START:
0944:                    selatom = MotifDnDConstants.Swapper.getInt(data + 12,
0945:                            eventByteOrder);
0946:                    break;
0947:                default:
0948:                    throw new IOException(
0949:                            "Cannot get data: invalid message reason");
0950:                }
0951:
0952:                if (selatom == 0) {
0953:                    throw new IOException(
0954:                            "Cannot get data: drag source property atom unavailable");
0955:                }
0956:
0957:                long time_stamp = MotifDnDConstants.Swapper.getInt(data + 4,
0958:                        eventByteOrder);
0959:                XAtom selectionAtom = XAtom.get(selatom);
0960:
0961:                XSelection selection = XSelection.getSelection(selectionAtom);
0962:                if (selection == null) {
0963:                    selection = new XSelection(selectionAtom, null);
0964:                }
0965:
0966:                return selection.getData(format, time_stamp);
0967:            }
0968:
0969:            public boolean sendDropDone(long ctxt, boolean success,
0970:                    int dropAction) {
0971:                XClientMessageEvent xclient = new XClientMessageEvent(ctxt);
0972:
0973:                if (xclient.get_message_type() != MotifDnDConstants.XA_MOTIF_DRAG_AND_DROP_MESSAGE
0974:                        .getAtom()) {
0975:                    return false;
0976:                }
0977:
0978:                long data = xclient.get_data();
0979:                byte reason = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_REASON_MASK);
0980:                byte origin = (byte) (unsafe.getByte(data) & MotifDnDConstants.MOTIF_MESSAGE_SENDER_MASK);
0981:                byte eventByteOrder = unsafe.getByte(data + 1);
0982:
0983:                if (origin != MotifDnDConstants.MOTIF_MESSAGE_FROM_INITIATOR) {
0984:                    return false;
0985:                }
0986:
0987:                if (reason != MotifDnDConstants.DROP_START) {
0988:                    return false;
0989:                }
0990:
0991:                long time_stamp = MotifDnDConstants.Swapper.getInt(data + 4,
0992:                        eventByteOrder);
0993:                long sel_atom = MotifDnDConstants.Swapper.getInt(data + 12,
0994:                        eventByteOrder);
0995:
0996:                long status_atom = 0;
0997:
0998:                if (success) {
0999:                    status_atom = MotifDnDConstants.XA_XmTRANSFER_SUCCESS
1000:                            .getAtom();
1001:                } else {
1002:                    status_atom = MotifDnDConstants.XA_XmTRANSFER_FAILURE
1003:                            .getAtom();
1004:                }
1005:
1006:                XToolkit.awtLock();
1007:                try {
1008:                    XlibWrapper
1009:                            .XConvertSelection(
1010:                                    XToolkit.getDisplay(),
1011:                                    sel_atom,
1012:                                    status_atom,
1013:                                    MotifDnDConstants.XA_MOTIF_ATOM_0.getAtom(),
1014:                                    XWindow.getXAWTRootWindow().getWindow(),
1015:                                    time_stamp);
1016:
1017:                    /*
1018:                     * Flush the buffer to guarantee that the drop completion event is sent 
1019:                     * to the source before the method returns.
1020:                     */
1021:                    XlibWrapper.XFlush(XToolkit.getDisplay());
1022:                } finally {
1023:                    XToolkit.awtUnlock();
1024:                }
1025:
1026:                /* Trick to prevent cleanup() from posting dragExit */
1027:                targetXWindow = null;
1028:
1029:                /* Cannot do cleanup before the drop finishes as we may need
1030:                   source protocol version to send drop finished message. */
1031:                cleanup();
1032:                return true;
1033:            }
1034:
1035:            public final long getSourceWindow() {
1036:                return sourceWindow;
1037:            }
1038:
1039:            /**
1040:             * Reset the state of the object.
1041:             */
1042:            public void cleanup() {
1043:                // Clear the reference to this protocol.
1044:                XDropTargetEventProcessor.reset();
1045:
1046:                if (targetXWindow != null) {
1047:                    notifyProtocolListener(targetXWindow, 0, 0,
1048:                            DnDConstants.ACTION_NONE, sourceActions, null,
1049:                            MouseEvent.MOUSE_EXITED);
1050:                }
1051:
1052:                if (sourceWindow != 0) {
1053:                    XToolkit.awtLock();
1054:                    try {
1055:                        XToolkit
1056:                                .WITH_XERROR_HANDLER(XToolkit.IgnoreBadWindowHandler);
1057:                        XlibWrapper.XSelectInput(XToolkit.getDisplay(),
1058:                                sourceWindow, sourceWindowMask);
1059:                        XToolkit.RESTORE_XERROR_HANDLER();
1060:                    } finally {
1061:                        XToolkit.awtUnlock();
1062:                    }
1063:                }
1064:
1065:                sourceWindow = 0;
1066:                sourceWindowMask = 0;
1067:                sourceProtocolVersion = 0;
1068:                sourceActions = DnDConstants.ACTION_NONE;
1069:                sourceFormats = null;
1070:                sourceAtom = 0;
1071:                userAction = DnDConstants.ACTION_NONE;
1072:                sourceX = 0;
1073:                sourceY = 0;
1074:                targetXWindow = null;
1075:                topLevelLeavePostponed = false;
1076:            }
1077:
1078:            public boolean isDragOverComponent() {
1079:                return targetXWindow != null;
1080:            }
1081:
1082:            private void notifyProtocolListener(XWindow xwindow, int x, int y,
1083:                    int dropAction, int actions, XClientMessageEvent xclient,
1084:                    int eventID) {
1085:                long nativeCtxt = 0;
1086:
1087:                // Make a copy of the passed XClientMessageEvent structure, since
1088:                // the original structure can be freed before this
1089:                // SunDropTargetEvent is dispatched.
1090:                if (xclient != null) {
1091:                    int size = new XClientMessageEvent(nativeCtxt).getSize();
1092:
1093:                    nativeCtxt = unsafe.allocateMemory(size + 4
1094:                            * Native.getLongSize());
1095:
1096:                    unsafe.copyMemory(xclient.pData, nativeCtxt, size);
1097:                }
1098:
1099:                getProtocolListener().handleDropTargetNotification(xwindow, x,
1100:                        y, dropAction, actions, sourceFormats, nativeCtxt,
1101:                        eventID);
1102:            }
1103:        }
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