1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 //#define DND_DEBUG TRUE

    27 

    28 #import "CDropTarget.h"

    29 #import "AWTView.h"

    30 

    31 #import "sun_lwawt_macosx_CDropTarget.h"

    32 #import "java_awt_dnd_DnDConstants.h"

    33 

    34 #import <JavaNativeFoundation/JavaNativeFoundation.h>

    35 #import <JavaRuntimeSupport/JavaRuntimeSupport.h>

    36 #include <objc/objc-runtime.h>

    37 

    38 

    39 #import "CDragSource.h"

    40 #import "CDataTransferer.h"

    41 #import "DnDUtilities.h"

    42 #import "ThreadUtilities.h"

    43 

    44 

    45 static NSInteger        sDraggingSequenceNumber = -1;

    46 static NSDragOperation    sDragOperation;

    47 static NSDragOperation    sUpdateOperation;

    48 static jint                sJavaDropOperation;

    49 static NSPoint            sDraggingLocation;

    50 static BOOL                sDraggingExited;

    51 static BOOL                sDraggingError;

    52 

    53 static NSUInteger        sPasteboardItemsCount = 0;

    54 static NSArray*            sPasteboardTypes = nil;

    55 static NSArray*            sPasteboardData = nil;

    56 static jlongArray        sDraggingFormats = nil;

    57 

    58 static CDropTarget*        sCurrentDropTarget;

    59 

    60 extern JNFClassInfo jc_CDropTargetContextPeer;

    61 

    62 @implementation CDropTarget

    63 

    64 + (CDropTarget *) currentDropTarget {

    65     return sCurrentDropTarget;

    66 }

    67 

    68 - (id)init:(jobject)jdropTarget component:(jobject)jcomponent peer:(jobject)jpeer control:(id)control

    69 {

    70     self = [super init];

    71     DLog2(@"[CDropTarget init]: %@\n", self);

    72 

    73     fView = nil;

    74     fComponent = nil;

    75     fDropTarget = nil;

    76     fDropTargetContextPeer = nil;

    77 

    78 

    79     if (control != nil) {

    80         JNIEnv *env = [ThreadUtilities getJNIEnvUncached];

    81         fComponent = JNFNewGlobalRef(env, jcomponent);

    82         fDropTarget = JNFNewGlobalRef(env, jdropTarget);

    83 

    84         AWTView *awtView = [((NSWindow *) control) contentView];

    85         fView = [awtView retain];

    86         [awtView setDropTarget:self];

    87 

    88 

    89     } else {

    90         // This would be an error.

    91         [self release];

    92         self = nil;

    93     }

    94     return self;

    95 }

    96 

    97 // When [CDropTarget init] is called the ControlModel's fView may not have been set up yet. ControlModel

    98 // (soon after) calls [CDropTarget controlModelControlValid] on the native event thread, once per CDropTarget,

    99 // to let it know it's been set up now.

   100 - (void)controlModelControlValid

   101 {

   102     // 9-30-02 Note: [Radar 3065621]

   103     // List all known pasteboard types here (see AppKit's NSPasteboard.h)

   104     // How to register for non-standard data types remains to be determined.

   105     NSArray* dataTypes = [[NSArray alloc] initWithObjects:

   106         NSStringPboardType,

   107         NSFilenamesPboardType,

   108         NSPostScriptPboardType,

   109         NSTIFFPboardType,

   110         NSRTFPboardType,

   111         NSTabularTextPboardType,

   112         NSFontPboardType,

   113         NSRulerPboardType,

   114         NSFileContentsPboardType,

   115         NSColorPboardType,

   116         NSRTFDPboardType,

   117         NSHTMLPboardType,

   118         NSURLPboardType,

   119         NSPDFPboardType,

   120         NSVCardPboardType,

   121         NSFilesPromisePboardType,

   122         [DnDUtilities javaPboardType],

   123         nil];

   124 

   125     // Enable dragging events over this object:

   126     [fView registerForDraggedTypes:dataTypes];

   127 

   128     [dataTypes release];

   129 }

   130 

   131 - (void)releaseDraggingData

   132 {

   133     DLog2(@"[CDropTarget releaseDraggingData]: %@\n", self);

   134 

   135     // Release any old pasteboard types, data and properties:

   136     [sPasteboardTypes release];

   137     sPasteboardTypes = nil;

   138 

   139     [sPasteboardData release];

   140     sPasteboardData = nil;

   141 

   142     if (sDraggingFormats != NULL) {

   143         JNIEnv *env = [ThreadUtilities getJNIEnv];

   144         JNFDeleteGlobalRef(env, sDraggingFormats);

   145         sDraggingFormats = NULL;

   146     }

   147 

   148     sPasteboardItemsCount = 0;

   149     sDraggingSequenceNumber = -1;

   150 }

   151 

   152 - (void)removeFromView:(JNIEnv *)env

   153 {

   154     DLog2(@"[CDropTarget removeFromView]: %@\n", self);

   155 

   156     // Remove this dragging destination from the view:

   157     [((AWTView *) fView) setDropTarget:nil];

   158 

   159     // Clean up JNI refs

   160     if (fComponent != NULL) {

   161         JNFDeleteGlobalRef(env, fComponent);

   162         fComponent = NULL;

   163     }

   164     if (fDropTarget != NULL) {

   165         JNFDeleteGlobalRef(env, fDropTarget);

   166         fDropTarget = NULL;

   167     }

   168     if (fDropTargetContextPeer != NULL) {

   169         JNFDeleteGlobalRef(env, fDropTargetContextPeer);

   170         fDropTargetContextPeer = NULL;

   171     }

   172 

   173     CFRelease(self);

   174 }

   175 

   176 - (void)dealloc

   177 {

   178     DLog2(@"[CDropTarget dealloc]: %@\n", self);

   179 

   180     [fView release];

   181     fView = nil;

   182 

   183     [super dealloc];

   184 }

   185 //- (void)finalize { [super finalize]; }

   186 

   187 - (NSInteger) getDraggingSequenceNumber

   188 {

   189     return sDraggingSequenceNumber;

   190 }

   191 

   192 // Debugging help:

   193 - (void)dumpPasteboard:(NSPasteboard*)pasteboard

   194 {

   195     NSArray* pasteboardTypes = [pasteboard types];

   196     NSUInteger pasteboardItemsCount = [pasteboardTypes count];

   197     NSUInteger i;

   198 

   199     // For each flavor on the pasteboard show the type, its data, and its property if there is one:

   200     for (i = 0; i < pasteboardItemsCount; i++) {

   201         NSString* pbType = [pasteboardTypes objectAtIndex:i];

   202         CFShow(pbType);

   203 

   204         NSData*    pbData = [pasteboard dataForType:pbType];

   205         CFShow(pbData);

   206 

   207         if ([pbType hasPrefix:@"CorePasteboardFlavorType"] == NO) {

   208             id pbDataProperty = [pasteboard propertyListForType:pbType];

   209             CFShow(pbDataProperty);

   210         }

   211     }

   212 }

   213 

   214 - (BOOL)copyDraggingTypes:(id<NSDraggingInfo>)sender

   215 {

   216     DLog2(@"[CDropTarget copyDraggingTypes]: %@\n", self);

   217     JNIEnv*    env = [ThreadUtilities getJNIEnv];

   218 

   219     // Release any old pasteboard data:

   220     [self releaseDraggingData];

   221 

   222     NSPasteboard* pb = [sender draggingPasteboard];

   223     sPasteboardTypes = [[pb types] retain];

   224     sPasteboardItemsCount = [sPasteboardTypes count];

   225     if (sPasteboardItemsCount == 0)

   226         return FALSE;

   227 

   228     jlongArray formats = (*env)->NewLongArray(env, sPasteboardItemsCount);

   229     if (formats == nil)

   230         return FALSE;

   231 

   232     sDraggingFormats = (jlongArray) JNFNewGlobalRef(env, formats);

   233     (*env)->DeleteLocalRef(env, formats);

   234     if (sDraggingFormats == nil)

   235         return FALSE;

   236 

   237     jboolean isCopy;

   238     jlong* jformats = (*env)->GetLongArrayElements(env, sDraggingFormats, &isCopy);

   239     if (jformats == nil) {

   240         return FALSE;

   241     }

   242 

   243     // Copy all data formats and properties. In case of properties, if they are nil, we need to use

   244     // a special NilProperty since [NSArray addObject] would crash on adding a nil object.

   245     DLog2(@"[CDropTarget copyDraggingTypes]: typesCount = %lu\n", (unsigned long) sPasteboardItemsCount);

   246     NSUInteger i;

   247     for (i = 0; i < sPasteboardItemsCount; i++) {

   248         NSString* pbType = [sPasteboardTypes objectAtIndex:i];

   249         DLog3(@"[CDropTarget copyDraggingTypes]: type[%lu] = %@\n", (unsigned long) i, pbType);

   250 

   251         // 01-10-03 Note: until we need data properties for doing something useful don't copy them.

   252         // They're often copies of their flavor's data and copying them for all available pasteboard flavors

   253         // (which are often auto-translation of one another) can be a significant time/space hit.

   254 

   255         // If this is a remote object type (not a pre-defined format) register it with the pasteboard:

   256         jformats[i] = indexForFormat(pbType);

   257         if (jformats[i] == -1 && [pbType hasPrefix:@"JAVA_DATAFLAVOR:application/x-java-remote-object;"])

   258             jformats[i] = registerFormatWithPasteboard(pbType);

   259     }

   260 

   261     (*env)->ReleaseLongArrayElements(env, sDraggingFormats, jformats, JNI_COMMIT);

   262 

   263     return TRUE;

   264 }

   265 

   266 - (BOOL)copyDraggingData:(id<NSDraggingInfo>)sender

   267 {

   268     DLog2(@"[CDropTarget copyDraggingData]: %@\n", self);

   269 

   270     sPasteboardData = [[NSMutableArray alloc] init];

   271     if (sPasteboardData == nil)

   272         return FALSE;

   273 

   274     // Copy all data items to a safe place since the pasteboard may go away before we'll need them:

   275     NSPasteboard* pb = [sender draggingPasteboard];

   276     NSUInteger i;

   277     for (i = 0; i < sPasteboardItemsCount; i++) {

   278         // Get a type and its data and save the data:

   279         NSString* pbType = [sPasteboardTypes objectAtIndex:i];

   280         // 01-10-03 Note: copying only NS-type data (until Java-specified types can make it through the AppKit)

   281         // would be a good idea since we can't do anything with those CoreFoundation unknown types anyway.

   282         // But I'm worried that it would break something in Fuller so I'm leaving this here as a reminder,

   283         // to be evaluated later.

   284         //id pbData = [pbType hasPrefix:@"NS"] ? [pb dataForType:pbType] : nil; // Copy only NS-type data!

   285         id pbData = [pb dataForType:pbType];

   286 

   287         // If the data is null we can't store it in the array - an exception would be thrown.

   288         // We use the special object NSNull instead which is kosher.

   289         if (pbData == nil)

   290             pbData = [NSNull null];

   291 

   292         [((NSMutableArray*) sPasteboardData) addObject:pbData];

   293     }

   294 

   295     return TRUE;

   296 }

   297 

   298 - (NSData*) getDraggingDataForURL:(NSData*)data

   299 {

   300     NSData* result = nil;

   301 

   302     // Convert data into a property list if possible:

   303     NSPropertyListFormat propertyListFormat;

   304     NSString* errorString = nil;

   305     id propertyList = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable

   306         format:&propertyListFormat errorDescription:&errorString];

   307 

   308     // URL types have only a single URL string in an array:

   309     if (propertyList != nil && errorString == nil && [propertyList isKindOfClass:[NSArray class]]) {

   310         NSArray*  array = (NSArray*) propertyList;

   311         if ([array count] > 0) {

   312             NSString* url = (NSString*) [array objectAtIndex:0];

   313             if (url != nil && [url length] > 0)

   314                 result = [url dataUsingEncoding:[url fastestEncoding]];

   315         }

   316     }

   317 

   318     return result;

   319 }

   320 

   321 - (jobject) copyDraggingDataForFormat:(jlong)format

   322 {

   323     JNIEnv*      env = [ThreadUtilities getJNIEnvUncached]; // Join the main thread by requesting uncached environment

   324 

   325     NSData*      data = nil;

   326 

   327     // Convert the Java format (datatransferer int index) to a pasteboard format (NSString):

   328     NSString* pbType = formatForIndex(format);

   329     if ([sPasteboardTypes containsObject:pbType]) {

   330         NSUInteger dataIndex = [sPasteboardTypes indexOfObject:pbType];

   331         data = [sPasteboardData objectAtIndex:dataIndex];

   332 

   333         if ((id) data == [NSNull null])

   334             data = nil;

   335 

   336         // format == 8 (CF_URL in CDataTransferer): we need a URL-to-String conversion:

   337         else if ([pbType isEqualToString:@"Apple URL pasteboard type"])

   338             data = [self getDraggingDataForURL:data];

   339     }

   340 

   341     // Get NS data:

   342     char* dataBytes = (data != nil) ? (char*) [data bytes] : "Unsupported type";

   343     NSUInteger dataLength = (data != nil) ? [data length] : sizeof("Unsupported type");

   344 

   345     // Create a global byte array:

   346     jbyteArray lbyteArray = (*env)->NewByteArray(env, dataLength);

   347     if (lbyteArray == nil)

   348         return nil;

   349     jbyteArray gbyteArray = (jbyteArray) JNFNewGlobalRef(env, lbyteArray);

   350     (*env)->DeleteLocalRef(env, lbyteArray);

   351     if (gbyteArray == nil)

   352         return nil;

   353 

   354     // Get byte array elements:

   355     jboolean isCopy;

   356     jbyte* jbytes = (*env)->GetByteArrayElements(env, gbyteArray, &isCopy);

   357     if (jbytes == nil)

   358         return nil;

   359 

   360     // Copy data to byte array and release elements:

   361     memcpy(jbytes, dataBytes, dataLength);

   362     (*env)->ReleaseByteArrayElements(env, gbyteArray, jbytes, JNI_COMMIT);

   363 

   364     // In case of an error make sure to return nil:

   365     if ((*env)->ExceptionOccurred(env)) {

   366                 (*env)->ExceptionDescribe(env);

   367         gbyteArray = nil;

   368         }

   369 

   370     return gbyteArray;

   371 }

   372 

   373 - (void)safeReleaseDraggingData:(NSNumber *)arg

   374 {

   375     jlong draggingSequenceNumber = [arg longLongValue];

   376 

   377     // Make sure dragging data is released only if no new drag is under way. If a new drag

   378     // has been initiated it has released the old dragging data already. This has to be called

   379     // on the native event thread - otherwise we'd need to start synchronizing.

   380     if (draggingSequenceNumber == sDraggingSequenceNumber)

   381         [self releaseDraggingData];

   382 }

   383 

   384 - (void)javaDraggingEnded:(jlong)draggingSequenceNumber success:(BOOL)jsuccess action:(jint)jdropaction

   385 {

   386     NSNumber *draggingSequenceNumberID = [NSNumber numberWithLongLong:draggingSequenceNumber];

   387         // Report back actual Swing success, not what AppKit thinks

   388         sDraggingError = !jsuccess;

   389         sDragOperation = [DnDUtilities mapJavaDragOperationToNS:jdropaction];

   390 

   391     // Release dragging data if any when Java's AWT event thread is all finished.

   392     // Make sure dragging data is released on the native event thread.

   393     [ThreadUtilities performOnMainThread:@selector(safeReleaseDraggingData:) onObject:self

   394                               withObject:draggingSequenceNumberID waitUntilDone:NO awtMode:NO];

   395 }

   396 

   397 - (jint)currentJavaActions {

   398     return [DnDUtilities mapNSDragOperationToJava:sUpdateOperation];

   399 }

   400 

   401 /********************************  BEGIN NSDraggingDestination Interface  ********************************/

   402 

   403 

   404 // Private API to calculate the current Java actions

   405 - (void) calculateCurrentSourceActions:(jint *)actions dropAction:(jint *)dropAction

   406 {

   407     // Get the raw (unmodified by keys) source actions

   408     id jrsDrag = objc_lookUpClass("JRSDrag");

   409     if (jrsDrag != nil) {

   410         NSDragOperation rawDragActions = (NSDragOperation) [jrsDrag performSelector:@selector(currentAllowableActions)];

   411         if (rawDragActions != NSDragOperationNone) {

   412             // Both actions and dropAction default to the rawActions

   413             *actions = [DnDUtilities mapNSDragOperationMaskToJava:rawDragActions];

   414             *dropAction = *actions;

   415 

   416             // Get the current key modifiers.

   417             NSUInteger dragModifiers = (NSUInteger) [jrsDrag performSelector:@selector(currentModifiers)];

   418             // Either the drop action is narrowed as per Java rules (MOVE, COPY, LINK, NONE) or by the drag modifiers

   419             if (dragModifiers) {

   420                 // Get the user selected operation based on the drag modifiers, then return the intersection

   421                 NSDragOperation currentOp = [DnDUtilities nsDragOperationForModifiers:dragModifiers];

   422                 NSDragOperation allowedOp = rawDragActions & currentOp;

   423 

   424                 *dropAction = [DnDUtilities mapNSDragOperationToJava:allowedOp];

   425             }

   426         }

   427     }

   428     *dropAction = [DnDUtilities narrowJavaDropActions:*dropAction];

   429 }

   430 

   431 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender

   432 {

   433     DLog2(@"[CDropTarget draggingEntered]: %@\n", self);

   434 

   435     sCurrentDropTarget = self;

   436 

   437     JNIEnv* env = [ThreadUtilities getJNIEnv];

   438     NSInteger draggingSequenceNumber = [sender draggingSequenceNumber];

   439 

   440     // Set the initial drag operation return value:

   441     NSDragOperation dragOp = NSDragOperationNone;

   442         sJavaDropOperation = java_awt_dnd_DnDConstants_ACTION_NONE;

   443 

   444     // We could probably special-case some stuff if drag and drop objects match:

   445     //if ([sender dragSource] == fView)

   446 

   447     if (draggingSequenceNumber != sDraggingSequenceNumber) {

   448         sDraggingSequenceNumber = draggingSequenceNumber;

   449         sDraggingError = FALSE;

   450 

   451         // Delete any drop target context peer left over from a previous drag:

   452         if (fDropTargetContextPeer != NULL) {

   453             JNFDeleteGlobalRef(env, fDropTargetContextPeer);

   454             fDropTargetContextPeer = NULL;

   455         }

   456 

   457         // Look up the CDropTargetContextPeer class:

   458         JNF_STATIC_MEMBER_CACHE(getDropTargetContextPeerMethod, jc_CDropTargetContextPeer, "getDropTargetContextPeer", "()Lsun/lwawt/macosx/CDropTargetContextPeer;");

   459         if (sDraggingError == FALSE) {

   460             // Create a new drop target context peer:

   461             jobject dropTargetContextPeer = JNFCallStaticObjectMethod(env, getDropTargetContextPeerMethod);

   462 

   463             if (dropTargetContextPeer != nil) {

   464                 fDropTargetContextPeer = JNFNewGlobalRef(env, dropTargetContextPeer);

   465                 (*env)->DeleteLocalRef(env, dropTargetContextPeer);

   466             }

   467         }

   468 

   469         // Get dragging types (dragging data is only copied if dropped):

   470         if (sDraggingError == FALSE && [self copyDraggingTypes:sender] == FALSE)

   471             sDraggingError = TRUE;

   472     }

   473 

   474     if (sDraggingError == FALSE) {

   475         sDraggingExited = FALSE;

   476         sDraggingLocation = [sender draggingLocation];

   477         NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];

   478         DLog5(@"+ dragEnter: loc native %f, %f, java %f, %f\n", sDraggingLocation.x, sDraggingLocation.y, javaLocation.x, javaLocation.y);

   479 

   480                 ////////// BEGIN Calculate the current drag actions //////////

   481                 jint actions = java_awt_dnd_DnDConstants_ACTION_NONE;

   482         jint dropAction = actions;

   483 

   484                 [self calculateCurrentSourceActions:&actions dropAction:&dropAction];

   485 

   486                 sJavaDropOperation = dropAction;

   487                 ////////// END Calculate the current drag actions //////////

   488 

   489         jlongArray formats = sDraggingFormats;

   490 

   491         JNF_MEMBER_CACHE(handleEnterMessageMethod, jc_CDropTargetContextPeer, "handleEnterMessage", "(Ljava/awt/Component;IIII[JJ)I");

   492         if (sDraggingError == FALSE) {

   493             // Double-casting self gets rid of 'different size' compiler warning:

   494             actions = JNFCallIntMethod(env, fDropTargetContextPeer, handleEnterMessageMethod, fComponent, (jint) javaLocation.x, (jint) javaLocation.y, dropAction, actions, formats, ptr_to_jlong(self)); // AWT_THREADING Safe (CToolkitThreadBlockedHandler)

   495         }

   496 

   497         if (sDraggingError == FALSE) {

   498             // Initialize drag operation:

   499             sDragOperation = NSDragOperationNone;

   500 

   501             // Map Java actions back to NSDragOperation.

   502             // 1-6-03 Note: if the entry point of this CDropTarget isn't covered by a droppable component

   503             // (as can be the case with lightweight children) we must not return NSDragOperationNone

   504             // since that would prevent dropping into any of the contained drop targets.

   505             // Unfortunately there is no easy way to test this so we just test actions and override them

   506             // with GENERIC if necessary. Proper drag operations will be returned by draggingUpdated: which is

   507             // called right away, taking care of setting the right cursor and snap-back action.

   508             dragOp = ((actions != java_awt_dnd_DnDConstants_ACTION_NONE) ?

   509                 [DnDUtilities mapJavaDragOperationToNS:dropAction] : NSDragOperationGeneric);

   510 

   511             // Remember the dragOp for no-op'd update messages:

   512             sUpdateOperation = dragOp;

   513         }

   514 

   515         // If we are in the same process as the sender, make the sender post the appropriate message

   516         if (sender) {

   517             [[CDragSource currentDragSource] postDragEnter];

   518         }

   519     }

   520 

   521     // 9-11-02 Note: the native event thread would not handle an exception gracefully:

   522     //if (sDraggingError == TRUE)

   523     //    [NSException raise:NSGenericException format:@"[CDropTarget draggingEntered] failed."];

   524 

   525     DLog2(@"[CDropTarget draggingEntered]: returning %lu\n", (unsigned long) dragOp);

   526 

   527     return dragOp;

   528 }

   529 

   530 - (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender

   531 {

   532     //DLog2(@"[CDropTarget draggingUpdated]: %@\n", self);

   533 

   534     sCurrentDropTarget = self;

   535 

   536     // Set the initial drag operation return value:

   537     NSDragOperation dragOp = (sDraggingError == FALSE ? sUpdateOperation : NSDragOperationNone);

   538 

   539     // There are two things we would be interested in:

   540     // a) mouse pointer has moved

   541     // b) drag actions (key modifiers) have changed

   542 

   543     NSPoint draggingLocation = [sender draggingLocation];

   544     JNIEnv* env = [ThreadUtilities getJNIEnv];

   545 

   546     BOOL notifyJava = FALSE;

   547 

   548     // a) mouse pointer has moved:

   549     if (NSEqualPoints(draggingLocation, sDraggingLocation) == FALSE) {

   550         //DLog2(@"[CDropTarget draggingUpdated]: mouse moved, %@\n", self);

   551         sDraggingLocation = draggingLocation;

   552         notifyJava = TRUE;

   553     }

   554 

   555     // b) drag actions (key modifiers) have changed (handleMotionMessage() will do proper notifications):

   556         ////////// BEGIN Calculate the current drag actions //////////

   557         jint actions = java_awt_dnd_DnDConstants_ACTION_NONE;

   558         jint dropAction = actions;

   559 

   560         [self calculateCurrentSourceActions:&actions dropAction:&dropAction];

   561 

   562         if (sJavaDropOperation != dropAction) {

   563             sJavaDropOperation = dropAction;

   564             notifyJava = TRUE;

   565         }

   566         ////////// END Calculate the current drag actions //////////

   567 

   568     jint userAction = dropAction;

   569 

   570     // Should we notify Java things have changed?

   571     if (sDraggingError == FALSE && notifyJava) {

   572         NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];

   573                 // For some reason even after the convertPoint drag events come with the y coordinate reverted

   574                 javaLocation.y = fView.window.frame.size.height - javaLocation.y;

   575         //DLog5(@"  : dragMoved: loc native %f, %f, java %f, %f\n", sDraggingLocation.x, sDraggingLocation.y, javaLocation.x, javaLocation.y);

   576 

   577         jlongArray formats = sDraggingFormats;

   578 

   579         JNF_MEMBER_CACHE(handleMotionMessageMethod, jc_CDropTargetContextPeer, "handleMotionMessage", "(Ljava/awt/Component;IIII[JJ)I");

   580         if (sDraggingError == FALSE) {

   581             DLog3(@"  >> posting handleMotionMessage, point %f, %f", javaLocation.x, javaLocation.y);

   582             userAction = JNFCallIntMethod(env, fDropTargetContextPeer, handleMotionMessageMethod, fComponent, (jint) javaLocation.x, (jint) javaLocation.y, dropAction, actions, formats, ptr_to_jlong(self)); // AWT_THREADING Safe (CToolkitThreadBlockedHandler)

   583         }

   584 

   585         if (sDraggingError == FALSE) {

   586             dragOp = [DnDUtilities mapJavaDragOperationToNS:userAction];

   587 

   588             // Remember the dragOp for no-op'd update messages:

   589             sUpdateOperation = dragOp;

   590         } else {

   591             dragOp = NSDragOperationNone;

   592         }

   593     }

   594 

   595     DLog2(@"[CDropTarget draggingUpdated]: returning %lu\n", (unsigned long) dragOp);

   596 

   597     return dragOp;

   598 }

   599 

   600 - (void)draggingExited:(id<NSDraggingInfo>)sender

   601 {

   602     DLog2(@"[CDropTarget draggingExited]: %@\n", self);

   603 

   604     sCurrentDropTarget = nil;

   605 

   606     JNIEnv* env = [ThreadUtilities getJNIEnv];

   607 

   608     if (sDraggingExited == FALSE && sDraggingError == FALSE) {

   609         JNF_MEMBER_CACHE(handleExitMessageMethod, jc_CDropTargetContextPeer, "handleExitMessage", "(Ljava/awt/Component;J)V");

   610         if (sDraggingError == FALSE) {

   611             DLog3(@"  - dragExit: loc native %f, %f\n", sDraggingLocation.x, sDraggingLocation.y);

   612             JNFCallVoidMethod(env, fDropTargetContextPeer, handleExitMessageMethod, fComponent, ptr_to_jlong(self)); // AWT_THREADING Safe (CToolkitThreadBlockedHandler)

   613             // If we are in the same process as the sender, make the sender post the appropriate message

   614             if (sender) {

   615                 [[CDragSource currentDragSource] postDragExit];

   616             }

   617         }

   618 

   619         // 5-27-03 Note: [Radar 3270455]

   620         // -draggingExited: can be called both by the AppKit and by -performDragOperation: but shouldn't execute

   621         // twice per drop since cleanup code like that in swing/plaf/basic/BasicDropTargetListener would throw NPEs.

   622         sDraggingExited = TRUE;

   623     }

   624 

   625     DLog(@"[CDropTarget draggingExited]: returning.\n");

   626 }

   627 

   628 - (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender

   629 {

   630     DLog2(@"[CDropTarget prepareForDragOperation]: %@\n", self);

   631     DLog2(@"[CDropTarget prepareForDragOperation]: returning %@\n", (sDraggingError ? @"NO" : @"YES"));

   632 

   633     return sDraggingError ? NO : YES;

   634 }

   635 

   636 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender

   637 {

   638     DLog2(@"[CDropTarget performDragOperation]: %@\n", self);

   639 

   640     sCurrentDropTarget = nil;

   641 

   642     JNIEnv* env = [ThreadUtilities getJNIEnv];

   643 

   644     // Now copy dragging data:

   645     if (sDraggingError == FALSE && [self copyDraggingData:sender] == FALSE)

   646         sDraggingError = TRUE;

   647 

   648     if (sDraggingError == FALSE) {

   649         sDraggingLocation = [sender draggingLocation];

   650         NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];

   651 

   652         jint actions = [DnDUtilities mapNSDragOperationMaskToJava:[sender draggingSourceOperationMask]];

   653         jint dropAction = sJavaDropOperation;

   654 

   655         jlongArray formats = sDraggingFormats;

   656 

   657         JNF_MEMBER_CACHE(handleDropMessageMethod, jc_CDropTargetContextPeer, "handleDropMessage", "(Ljava/awt/Component;IIII[JJ)V");

   658 

   659         if (sDraggingError == FALSE) {

   660             JNFCallVoidMethod(env, fDropTargetContextPeer, handleDropMessageMethod, fComponent, (jint) javaLocation.x, (jint) javaLocation.y, dropAction, actions, formats, ptr_to_jlong(self)); // AWT_THREADING Safe (event)

   661         }

   662 

   663         if (sDraggingError == FALSE) {

   664             JNF_MEMBER_CACHE(flushEventsMethod, jc_CDropTargetContextPeer, "flushEvents", "(Ljava/awt/Component;)V");

   665             if (sDraggingError == FALSE) {

   666                 JNFCallVoidMethod(env, fDropTargetContextPeer, flushEventsMethod, fComponent); // AWT_THREADING Safe (AWTRunLoopMode)

   667             }

   668         }

   669     } else {

   670         // 8-19-03 Note: [Radar 3368754]

   671         // draggingExited: is not called after a drop - we must do that here ... but only in case

   672         // of an error, instead of drop(). Otherwise we get twice the cleanup in shared code.

   673         [self draggingExited:sender];

   674     }

   675 

   676 // TODO:BG

   677 //   [(id)sender _setLastDragDestinationOperation:sDragOperation];

   678 

   679 

   680     DLog2(@"[CDropTarget performDragOperation]: returning %@\n", (sDraggingError ? @"NO" : @"YES"));

   681 

   682     return !sDraggingError;

   683 }

   684 

   685 - (void)concludeDragOperation:(id<NSDraggingInfo>)sender

   686 {

   687     sCurrentDropTarget = nil;

   688 

   689     DLog2(@"[CDropTarget concludeDragOperation]: %@\n", self);

   690     DLog(@"[CDropTarget concludeDragOperation]: returning.\n");

   691 }

   692 

   693 // 9-11-02 Note: draggingEnded is not yet implemented by the AppKit.

   694 - (void)draggingEnded:(id<NSDraggingInfo>)sender

   695 {

   696     sCurrentDropTarget = nil;

   697 

   698     DLog2(@"[CDropTarget draggingEnded]: %@\n", self);

   699     DLog(@"[CDropTarget draggingEnded]: returning.\n");

   700 }

   701 

   702 /********************************  END NSDraggingDestination Interface  ********************************/

   703 

   704 @end

   705 

   706 

   707 /*

   708  * Class:     sun_lwawt_macosx_CDropTarget

   709  * Method:    createNativeDropTarget

   710  * Signature: (Ljava/awt/dnd/DropTarget;Ljava/awt/Component;Ljava/awt/peer/ComponentPeer;J)J

   711  */

   712 JNIEXPORT jlong JNICALL Java_sun_lwawt_macosx_CDropTarget_createNativeDropTarget

   713   (JNIEnv *env, jobject jthis, jobject jdroptarget, jobject jcomponent, jobject jpeer, jlong jnativepeer)

   714 {

   715     CDropTarget* dropTarget = nil;

   716 

   717 JNF_COCOA_ENTER(env);

   718     id controlObj = (id) jlong_to_ptr(jnativepeer);

   719     dropTarget = [[CDropTarget alloc] init:jdroptarget component:jcomponent peer:jpeer control:controlObj];

   720 JNF_COCOA_EXIT(env);

   721 

   722     if (dropTarget) {

   723         CFRetain(dropTarget); // GC

   724         [dropTarget release];

   725     }

   726     return ptr_to_jlong(dropTarget);

   727 }

   728 

   729 /*

   730  * Class:     sun_lwawt_macosx_CDropTarget

   731  * Method:    releaseNativeDropTarget

   732  * Signature: (J)V

   733  */

   734 JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTarget_releaseNativeDropTarget

   735   (JNIEnv *env, jobject jthis, jlong nativeDropTargetVal)

   736 {

   737     id dropTarget = (id)jlong_to_ptr(nativeDropTargetVal);

   738 

   739 JNF_COCOA_ENTER(env);

   740     [dropTarget removeFromView:env];

   741 JNF_COCOA_EXIT(env);

   742 }