1 /*
2 * Copyright (c) 2011, 2013, 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 fView = [((AWTView *) control) retain];
85 [fView setDropTarget:self];
86
87
88 } else {
89 // This would be an error.
90 [self release];
91 self = nil;
92 }
93 return self;
94 }
95
96 // When [CDropTarget init] is called the ControlModel's fView may not have been set up yet. ControlModel
97 // (soon after) calls [CDropTarget controlModelControlValid] on the native event thread, once per CDropTarget,
98 // to let it know it's been set up now.
99 - (void)controlModelControlValid
100 {
101 // 9-30-02 Note: [Radar 3065621]
102 // List all known pasteboard types here (see AppKit's NSPasteboard.h)
103 // How to register for non-standard data types remains to be determined.
104 NSArray* dataTypes = [[NSArray alloc] initWithObjects:
105 NSStringPboardType,
106 NSFilenamesPboardType,
107 NSPostScriptPboardType,
108 NSTIFFPboardType,
109 NSPasteboardTypePNG,
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 (NSString*)kUTTypeJPEG,
124 nil];
125
126 // Enable dragging events over this object:
127 [fView registerForDraggedTypes:dataTypes];
128
129 [dataTypes release];
130 }
131
132 - (void)releaseDraggingData
133 {
134 DLog2(@"[CDropTarget releaseDraggingData]: %@\n", self);
135
136 // Release any old pasteboard types, data and properties:
137 [sPasteboardTypes release];
138 sPasteboardTypes = nil;
139
140 [sPasteboardData release];
141 sPasteboardData = nil;
142
143 if (sDraggingFormats != NULL) {
144 JNIEnv *env = [ThreadUtilities getJNIEnv];
145 JNFDeleteGlobalRef(env, sDraggingFormats);
146 sDraggingFormats = NULL;
147 }
148
149 sPasteboardItemsCount = 0;
150 sDraggingSequenceNumber = -1;
151 }
152
153 - (void)removeFromView:(JNIEnv *)env
154 {
155 DLog2(@"[CDropTarget removeFromView]: %@\n", self);
156
157 // Remove this dragging destination from the view:
158 [((AWTView *) fView) setDropTarget:nil];
159
160 // Clean up JNI refs
161 if (fComponent != NULL) {
162 JNFDeleteGlobalRef(env, fComponent);
163 fComponent = NULL;
164 }
165 if (fDropTarget != NULL) {
166 JNFDeleteGlobalRef(env, fDropTarget);
167 fDropTarget = NULL;
168 }
169 if (fDropTargetContextPeer != NULL) {
170 JNFDeleteGlobalRef(env, fDropTargetContextPeer);
171 fDropTargetContextPeer = NULL;
172 }
173
174 CFRelease(self);
175 }
176
177 - (void)dealloc
178 {
179 DLog2(@"[CDropTarget dealloc]: %@\n", self);
180
181 if(sCurrentDropTarget == self) {
182 sCurrentDropTarget = nil;
183 }
184
185 [fView release];
186 fView = nil;
187
188 [super dealloc];
189 }
190 //- (void)finalize { [super finalize]; }
191
192 - (NSInteger) getDraggingSequenceNumber
193 {
194 return sDraggingSequenceNumber;
195 }
196
197 // Debugging help:
198 - (void)dumpPasteboard:(NSPasteboard*)pasteboard
199 {
200 NSArray* pasteboardTypes = [pasteboard types];
201 NSUInteger pasteboardItemsCount = [pasteboardTypes count];
202 NSUInteger i;
203
204 // For each flavor on the pasteboard show the type, its data, and its property if there is one:
205 for (i = 0; i < pasteboardItemsCount; i++) {
206 NSString* pbType = [pasteboardTypes objectAtIndex:i];
207 CFShow(pbType);
208
209 NSData* pbData = [pasteboard dataForType:pbType];
210 CFShow(pbData);
211
212 if ([pbType hasPrefix:@"CorePasteboardFlavorType"] == NO) {
213 id pbDataProperty = [pasteboard propertyListForType:pbType];
214 CFShow(pbDataProperty);
215 }
216 }
217 }
218
219 - (BOOL)copyDraggingTypes:(id<NSDraggingInfo>)sender
220 {
221 DLog2(@"[CDropTarget copyDraggingTypes]: %@\n", self);
222 JNIEnv* env = [ThreadUtilities getJNIEnv];
223
224 // Release any old pasteboard data:
225 [self releaseDraggingData];
226
227 NSPasteboard* pb = [sender draggingPasteboard];
228 sPasteboardTypes = [[pb types] retain];
229 sPasteboardItemsCount = [sPasteboardTypes count];
230 if (sPasteboardItemsCount == 0)
231 return FALSE;
232
233 jlongArray formats = (*env)->NewLongArray(env, sPasteboardItemsCount);
234 if (formats == nil)
235 return FALSE;
236
237 sDraggingFormats = (jlongArray) JNFNewGlobalRef(env, formats);
238 (*env)->DeleteLocalRef(env, formats);
239 if (sDraggingFormats == nil)
240 return FALSE;
241
242 jboolean isCopy;
243 jlong* jformats = (*env)->GetLongArrayElements(env, sDraggingFormats, &isCopy);
244 if (jformats == nil) {
245 return FALSE;
246 }
247
248 // Copy all data formats and properties. In case of properties, if they are nil, we need to use
249 // a special NilProperty since [NSArray addObject] would crash on adding a nil object.
250 DLog2(@"[CDropTarget copyDraggingTypes]: typesCount = %lu\n", (unsigned long) sPasteboardItemsCount);
251 NSUInteger i;
252 for (i = 0; i < sPasteboardItemsCount; i++) {
253 NSString* pbType = [sPasteboardTypes objectAtIndex:i];
254 DLog3(@"[CDropTarget copyDraggingTypes]: type[%lu] = %@\n", (unsigned long) i, pbType);
255
256 // 01-10-03 Note: until we need data properties for doing something useful don't copy them.
257 // They're often copies of their flavor's data and copying them for all available pasteboard flavors
258 // (which are often auto-translation of one another) can be a significant time/space hit.
259
260 // If this is a remote object type (not a pre-defined format) register it with the pasteboard:
261 jformats[i] = indexForFormat(pbType);
262 if (jformats[i] == -1 && [pbType hasPrefix:@"JAVA_DATAFLAVOR:application/x-java-remote-object;"])
263 jformats[i] = registerFormatWithPasteboard(pbType);
264 }
265
266 (*env)->ReleaseLongArrayElements(env, sDraggingFormats, jformats, JNI_COMMIT);
267
268 return TRUE;
269 }
270
271 - (BOOL)copyDraggingData:(id<NSDraggingInfo>)sender
272 {
273 DLog2(@"[CDropTarget copyDraggingData]: %@\n", self);
274
275 sPasteboardData = [[NSMutableArray alloc] init];
276 if (sPasteboardData == nil)
277 return FALSE;
278
279 // Copy all data items to a safe place since the pasteboard may go away before we'll need them:
280 NSPasteboard* pb = [sender draggingPasteboard];
281 NSUInteger i;
282 for (i = 0; i < sPasteboardItemsCount; i++) {
283 // Get a type and its data and save the data:
284 NSString* pbType = [sPasteboardTypes objectAtIndex:i];
285 // 01-10-03 Note: copying only NS-type data (until Java-specified types can make it through the AppKit)
286 // would be a good idea since we can't do anything with those CoreFoundation unknown types anyway.
287 // But I'm worried that it would break something in Fuller so I'm leaving this here as a reminder,
288 // to be evaluated later.
289 //id pbData = [pbType hasPrefix:@"NS"] ? [pb dataForType:pbType] : nil; // Copy only NS-type data!
290 id pbData = [pb dataForType:pbType];
291
292 // If the data is null we can't store it in the array - an exception would be thrown.
293 // We use the special object NSNull instead which is kosher.
294 if (pbData == nil)
295 pbData = [NSNull null];
296
297 [((NSMutableArray*) sPasteboardData) addObject:pbData];
298 }
299
300 return TRUE;
301 }
302
303 - (NSData*) getDraggingDataForURL:(NSData*)data
304 {
305 NSData* result = nil;
306
307 // Convert data into a property list if possible:
308 NSPropertyListFormat propertyListFormat;
309 NSString* errorString = nil;
310 id propertyList = [NSPropertyListSerialization propertyListFromData:data mutabilityOption:NSPropertyListImmutable
311 format:&propertyListFormat errorDescription:&errorString];
312
313 // URL types have only a single URL string in an array:
314 if (propertyList != nil && errorString == nil && [propertyList isKindOfClass:[NSArray class]]) {
315 NSArray* array = (NSArray*) propertyList;
316 if ([array count] > 0) {
317 NSString* url = (NSString*) [array objectAtIndex:0];
318 if (url != nil && [url length] > 0)
319 result = [url dataUsingEncoding:[url fastestEncoding]];
320 }
321 }
322
323 return result;
324 }
325
326 - (jobject) copyDraggingDataForFormat:(jlong)format
327 {
328 JNIEnv* env = [ThreadUtilities getJNIEnvUncached]; // Join the main thread by requesting uncached environment
329
330 NSData* data = nil;
331
332 // Convert the Java format (datatransferer int index) to a pasteboard format (NSString):
333 NSString* pbType = formatForIndex(format);
334 if ([sPasteboardTypes containsObject:pbType]) {
335 NSUInteger dataIndex = [sPasteboardTypes indexOfObject:pbType];
336 data = [sPasteboardData objectAtIndex:dataIndex];
337
338 if ((id) data == [NSNull null])
339 data = nil;
340
341 // format == 8 (CF_URL in CDataTransferer): we need a URL-to-String conversion:
342 else if ([pbType isEqualToString:@"Apple URL pasteboard type"])
343 data = [self getDraggingDataForURL:data];
344 }
345
346 // Get NS data:
347 char* dataBytes = (data != nil) ? (char*) [data bytes] : "Unsupported type";
348 NSUInteger dataLength = (data != nil) ? [data length] : sizeof("Unsupported type");
349
350 // Create a global byte array:
351 jbyteArray lbyteArray = (*env)->NewByteArray(env, dataLength);
352 if (lbyteArray == nil)
353 return nil;
354 jbyteArray gbyteArray = (jbyteArray) JNFNewGlobalRef(env, lbyteArray);
355 (*env)->DeleteLocalRef(env, lbyteArray);
356 if (gbyteArray == nil)
357 return nil;
358
359 // Get byte array elements:
360 jboolean isCopy;
361 jbyte* jbytes = (*env)->GetByteArrayElements(env, gbyteArray, &isCopy);
362 if (jbytes == nil)
363 return nil;
364
365 // Copy data to byte array and release elements:
366 memcpy(jbytes, dataBytes, dataLength);
367 (*env)->ReleaseByteArrayElements(env, gbyteArray, jbytes, JNI_COMMIT);
368
369 // In case of an error make sure to return nil:
370 if ((*env)->ExceptionOccurred(env)) {
371 (*env)->ExceptionDescribe(env);
372 gbyteArray = nil;
373 }
374
375 return gbyteArray;
376 }
377
378 - (void)safeReleaseDraggingData:(NSNumber *)arg
379 {
380 jlong draggingSequenceNumber = [arg longLongValue];
381
382 // Make sure dragging data is released only if no new drag is under way. If a new drag
383 // has been initiated it has released the old dragging data already. This has to be called
384 // on the native event thread - otherwise we'd need to start synchronizing.
385 if (draggingSequenceNumber == sDraggingSequenceNumber)
386 [self releaseDraggingData];
387 }
388
389 - (void)javaDraggingEnded:(jlong)draggingSequenceNumber success:(BOOL)jsuccess action:(jint)jdropaction
390 {
391 NSNumber *draggingSequenceNumberID = [NSNumber numberWithLongLong:draggingSequenceNumber];
392 // Report back actual Swing success, not what AppKit thinks
393 sDraggingError = !jsuccess;
394 sDragOperation = [DnDUtilities mapJavaDragOperationToNS:jdropaction];
395
396 // Release dragging data if any when Java's AWT event thread is all finished.
397 // Make sure dragging data is released on the native event thread.
398 [ThreadUtilities performOnMainThread:@selector(safeReleaseDraggingData:) on:self withObject:draggingSequenceNumberID waitUntilDone:NO];
399 }
400
401 - (jint)currentJavaActions {
402 return [DnDUtilities mapNSDragOperationToJava:sUpdateOperation];
403 }
404
405 /******************************** BEGIN NSDraggingDestination Interface ********************************/
406
407
408 // Private API to calculate the current Java actions
409 - (void) calculateCurrentSourceActions:(jint *)actions dropAction:(jint *)dropAction
410 {
411 // Get the raw (unmodified by keys) source actions
412 id jrsDrag = objc_lookUpClass("JRSDrag");
413 if (jrsDrag != nil) {
414 NSDragOperation rawDragActions = (NSDragOperation) [jrsDrag performSelector:@selector(currentAllowableActions)];
415 if (rawDragActions != NSDragOperationNone) {
416 // Both actions and dropAction default to the rawActions
417 *actions = [DnDUtilities mapNSDragOperationMaskToJava:rawDragActions];
418 *dropAction = *actions;
419
420 // Get the current key modifiers.
421 NSUInteger dragModifiers = (NSUInteger) [jrsDrag performSelector:@selector(currentModifiers)];
422 // Either the drop action is narrowed as per Java rules (MOVE, COPY, LINK, NONE) or by the drag modifiers
423 if (dragModifiers) {
424 // Get the user selected operation based on the drag modifiers, then return the intersection
425 NSDragOperation currentOp = [DnDUtilities nsDragOperationForModifiers:dragModifiers];
426 NSDragOperation allowedOp = rawDragActions & currentOp;
427
428 *dropAction = [DnDUtilities mapNSDragOperationToJava:allowedOp];
429 }
430 }
431 }
432 *dropAction = [DnDUtilities narrowJavaDropActions:*dropAction];
433 }
434
435 - (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender
436 {
437 DLog2(@"[CDropTarget draggingEntered]: %@\n", self);
438
439 sCurrentDropTarget = self;
440
441 JNIEnv* env = [ThreadUtilities getJNIEnv];
442 NSInteger draggingSequenceNumber = [sender draggingSequenceNumber];
443
444 // Set the initial drag operation return value:
445 NSDragOperation dragOp = NSDragOperationNone;
446 sJavaDropOperation = java_awt_dnd_DnDConstants_ACTION_NONE;
447
448 // We could probably special-case some stuff if drag and drop objects match:
449 //if ([sender dragSource] == fView)
450
451 if (draggingSequenceNumber != sDraggingSequenceNumber) {
452 sDraggingSequenceNumber = draggingSequenceNumber;
453 sDraggingError = FALSE;
454
455 // Delete any drop target context peer left over from a previous drag:
456 if (fDropTargetContextPeer != NULL) {
457 JNFDeleteGlobalRef(env, fDropTargetContextPeer);
458 fDropTargetContextPeer = NULL;
459 }
460
461 // Look up the CDropTargetContextPeer class:
462 JNF_STATIC_MEMBER_CACHE(getDropTargetContextPeerMethod, jc_CDropTargetContextPeer, "getDropTargetContextPeer", "()Lsun/lwawt/macosx/CDropTargetContextPeer;");
463 if (sDraggingError == FALSE) {
464 // Create a new drop target context peer:
465 jobject dropTargetContextPeer = JNFCallStaticObjectMethod(env, getDropTargetContextPeerMethod);
466
467 if (dropTargetContextPeer != nil) {
468 fDropTargetContextPeer = JNFNewGlobalRef(env, dropTargetContextPeer);
469 (*env)->DeleteLocalRef(env, dropTargetContextPeer);
470 }
471 }
472
473 // Get dragging types (dragging data is only copied if dropped):
474 if (sDraggingError == FALSE && [self copyDraggingTypes:sender] == FALSE)
475 sDraggingError = TRUE;
476 }
477
478 if (sDraggingError == FALSE) {
479 sDraggingExited = FALSE;
480 sDraggingLocation = [sender draggingLocation];
481 NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];
482 javaLocation.y = fView.window.frame.size.height - javaLocation.y;
483
484 DLog5(@"+ dragEnter: loc native %f, %f, java %f, %f\n", sDraggingLocation.x, sDraggingLocation.y, javaLocation.x, javaLocation.y);
485
486 ////////// BEGIN Calculate the current drag actions //////////
487 jint actions = java_awt_dnd_DnDConstants_ACTION_NONE;
488 jint dropAction = actions;
489
490 [self calculateCurrentSourceActions:&actions dropAction:&dropAction];
491
492 sJavaDropOperation = dropAction;
493 ////////// END Calculate the current drag actions //////////
494
495 jlongArray formats = sDraggingFormats;
496
497 JNF_MEMBER_CACHE(handleEnterMessageMethod, jc_CDropTargetContextPeer, "handleEnterMessage", "(Ljava/awt/Component;IIII[JJ)I");
498 if (sDraggingError == FALSE) {
499 // Double-casting self gets rid of 'different size' compiler warning:
500 // AWT_THREADING Safe (CToolkitThreadBlockedHandler)
501 actions = JNFCallIntMethod(env, fDropTargetContextPeer, handleEnterMessageMethod,
502 fComponent, (jint) javaLocation.x, (jint) javaLocation.y,
503 dropAction, actions, formats, ptr_to_jlong(self));
504 }
505
506 if (sDraggingError == FALSE) {
507 // Initialize drag operation:
508 sDragOperation = NSDragOperationNone;
509
510 // Map Java actions back to NSDragOperation.
511 // 1-6-03 Note: if the entry point of this CDropTarget isn't covered by a droppable component
512 // (as can be the case with lightweight children) we must not return NSDragOperationNone
513 // since that would prevent dropping into any of the contained drop targets.
514 // Unfortunately there is no easy way to test this so we just test actions and override them
515 // with GENERIC if necessary. Proper drag operations will be returned by draggingUpdated: which is
516 // called right away, taking care of setting the right cursor and snap-back action.
517 dragOp = ((actions != java_awt_dnd_DnDConstants_ACTION_NONE) ?
518 [DnDUtilities mapJavaDragOperationToNS:dropAction] : NSDragOperationGeneric);
519
520 // Remember the dragOp for no-op'd update messages:
521 sUpdateOperation = dragOp;
522 }
523 }
524
525 // 9-11-02 Note: the native event thread would not handle an exception gracefully:
526 //if (sDraggingError == TRUE)
527 // [NSException raise:NSGenericException format:@"[CDropTarget draggingEntered] failed."];
528
529 DLog2(@"[CDropTarget draggingEntered]: returning %lu\n", (unsigned long) dragOp);
530
531 return dragOp;
532 }
533
534 - (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender
535 {
536 //DLog2(@"[CDropTarget draggingUpdated]: %@\n", self);
537
538 sCurrentDropTarget = self;
539
540 // Set the initial drag operation return value:
541 NSDragOperation dragOp = (sDraggingError == FALSE ? sUpdateOperation : NSDragOperationNone);
542
543 // There are two things we would be interested in:
544 // a) mouse pointer has moved
545 // b) drag actions (key modifiers) have changed
546
547 NSPoint draggingLocation = [sender draggingLocation];
548 JNIEnv* env = [ThreadUtilities getJNIEnv];
549
550 BOOL notifyJava = FALSE;
551
552 // a) mouse pointer has moved:
553 if (NSEqualPoints(draggingLocation, sDraggingLocation) == FALSE) {
554 //DLog2(@"[CDropTarget draggingUpdated]: mouse moved, %@\n", self);
555 sDraggingLocation = draggingLocation;
556 notifyJava = TRUE;
557 }
558
559 // b) drag actions (key modifiers) have changed (handleMotionMessage() will do proper notifications):
560 ////////// BEGIN Calculate the current drag actions //////////
561 jint actions = java_awt_dnd_DnDConstants_ACTION_NONE;
562 jint dropAction = actions;
563
564 [self calculateCurrentSourceActions:&actions dropAction:&dropAction];
565
566 if (sJavaDropOperation != dropAction) {
567 sJavaDropOperation = dropAction;
568 notifyJava = TRUE;
569 }
570 ////////// END Calculate the current drag actions //////////
571
572 jint userAction = dropAction;
573
574 // Should we notify Java things have changed?
575 if (sDraggingError == FALSE && notifyJava) {
576 NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];
577 javaLocation.y = fView.window.frame.size.height - javaLocation.y;
578 //DLog5(@" : dragMoved: loc native %f, %f, java %f, %f\n", sDraggingLocation.x, sDraggingLocation.y, javaLocation.x, javaLocation.y);
579
580 jlongArray formats = sDraggingFormats;
581
582 JNF_MEMBER_CACHE(handleMotionMessageMethod, jc_CDropTargetContextPeer, "handleMotionMessage", "(Ljava/awt/Component;IIII[JJ)I");
583 if (sDraggingError == FALSE) {
584 DLog3(@" >> posting handleMotionMessage, point %f, %f", javaLocation.x, javaLocation.y);
585 userAction = JNFCallIntMethod(env, fDropTargetContextPeer, handleMotionMessageMethod, fComponent, (jint) javaLocation.x, (jint) javaLocation.y, dropAction, actions, formats, ptr_to_jlong(self)); // AWT_THREADING Safe (CToolkitThreadBlockedHandler)
586 }
587
588 if (sDraggingError == FALSE) {
589 dragOp = [DnDUtilities mapJavaDragOperationToNS:userAction];
590
591 // Remember the dragOp for no-op'd update messages:
592 sUpdateOperation = dragOp;
593 } else {
594 dragOp = NSDragOperationNone;
595 }
596 }
597
598 DLog2(@"[CDropTarget draggingUpdated]: returning %lu\n", (unsigned long) dragOp);
599
600 return dragOp;
601 }
602
603 - (void)draggingExited:(id<NSDraggingInfo>)sender
604 {
605 DLog2(@"[CDropTarget draggingExited]: %@\n", self);
606
607 sCurrentDropTarget = nil;
608
609 JNIEnv* env = [ThreadUtilities getJNIEnv];
610
611 if (sDraggingExited == FALSE && sDraggingError == FALSE) {
612 JNF_MEMBER_CACHE(handleExitMessageMethod, jc_CDropTargetContextPeer, "handleExitMessage", "(Ljava/awt/Component;J)V");
613 if (sDraggingError == FALSE) {
614 DLog3(@" - dragExit: loc native %f, %f\n", sDraggingLocation.x, sDraggingLocation.y);
615 // AWT_THREADING Safe (CToolkitThreadBlockedHandler)
616 JNFCallVoidMethod(env, fDropTargetContextPeer,
617 handleExitMessageMethod, fComponent, ptr_to_jlong(self));
618 }
619
620 // 5-27-03 Note: [Radar 3270455]
621 // -draggingExited: can be called both by the AppKit and by -performDragOperation: but shouldn't execute
622 // twice per drop since cleanup code like that in swing/plaf/basic/BasicDropTargetListener would throw NPEs.
623 sDraggingExited = TRUE;
624 }
625
626 DLog(@"[CDropTarget draggingExited]: returning.\n");
627 }
628
629 - (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender
630 {
631 DLog2(@"[CDropTarget prepareForDragOperation]: %@\n", self);
632 DLog2(@"[CDropTarget prepareForDragOperation]: returning %@\n", (sDraggingError ? @"NO" : @"YES"));
633
634 return sDraggingError ? NO : YES;
635 }
636
637 - (BOOL)performDragOperation:(id<NSDraggingInfo>)sender
638 {
639 DLog2(@"[CDropTarget performDragOperation]: %@\n", self);
640
641 sCurrentDropTarget = nil;
642
643 JNIEnv* env = [ThreadUtilities getJNIEnv];
644
645 // Now copy dragging data:
646 if (sDraggingError == FALSE && [self copyDraggingData:sender] == FALSE)
647 sDraggingError = TRUE;
648
649 if (sDraggingError == FALSE) {
650 sDraggingLocation = [sender draggingLocation];
651 NSPoint javaLocation = [fView convertPoint:sDraggingLocation fromView:nil];
652 // The y coordinate that comes in the NSDraggingInfo seems to be reversed - probably
653 // has to do something with the type of view it comes to.
654 // This is the earliest place where we can correct it.
655 javaLocation.y = fView.window.frame.size.height - javaLocation.y;
656
657 jint actions = [DnDUtilities mapNSDragOperationMaskToJava:[sender draggingSourceOperationMask]];
658 jint dropAction = sJavaDropOperation;
659
660 jlongArray formats = sDraggingFormats;
661
662 JNF_MEMBER_CACHE(handleDropMessageMethod, jc_CDropTargetContextPeer, "handleDropMessage", "(Ljava/awt/Component;IIII[JJ)V");
663
664 if (sDraggingError == FALSE) {
665 JNFCallVoidMethod(env, fDropTargetContextPeer, handleDropMessageMethod, fComponent, (jint) javaLocation.x, (jint) javaLocation.y, dropAction, actions, formats, ptr_to_jlong(self)); // AWT_THREADING Safe (event)
666 }
667
668 if (sDraggingError == FALSE) {
669 JNF_MEMBER_CACHE(flushEventsMethod, jc_CDropTargetContextPeer, "flushEvents", "(Ljava/awt/Component;)V");
670 if (sDraggingError == FALSE) {
671 JNFCallVoidMethod(env, fDropTargetContextPeer, flushEventsMethod, fComponent); // AWT_THREADING Safe (AWTRunLoopMode)
672 }
673 }
674 } else {
675 // 8-19-03 Note: [Radar 3368754]
676 // draggingExited: is not called after a drop - we must do that here ... but only in case
677 // of an error, instead of drop(). Otherwise we get twice the cleanup in shared code.
678 [self draggingExited:sender];
679 }
680
681 // TODO:BG
682 // [(id)sender _setLastDragDestinationOperation:sDragOperation];
683
684
685 DLog2(@"[CDropTarget performDragOperation]: returning %@\n", (sDraggingError ? @"NO" : @"YES"));
686
687 return !sDraggingError;
688 }
689
690 - (void)concludeDragOperation:(id<NSDraggingInfo>)sender
691 {
692 sCurrentDropTarget = nil;
693
694 DLog2(@"[CDropTarget concludeDragOperation]: %@\n", self);
695 DLog(@"[CDropTarget concludeDragOperation]: returning.\n");
696 }
697
698 // 9-11-02 Note: draggingEnded is not yet implemented by the AppKit.
699 - (void)draggingEnded:(id<NSDraggingInfo>)sender
700 {
701 sCurrentDropTarget = nil;
702
703 DLog2(@"[CDropTarget draggingEnded]: %@\n", self);
704 DLog(@"[CDropTarget draggingEnded]: returning.\n");
705 }
706
707 /******************************** END NSDraggingDestination Interface ********************************/
708
709 @end
710
711
712 /*
713 * Class: sun_lwawt_macosx_CDropTarget
714 * Method: createNativeDropTarget
715 * Signature: (Ljava/awt/dnd/DropTarget;Ljava/awt/Component;Ljava/awt/peer/ComponentPeer;J)J
716 */
717 JNIEXPORT jlong JNICALL Java_sun_lwawt_macosx_CDropTarget_createNativeDropTarget
718 (JNIEnv *env, jobject jthis, jobject jdroptarget, jobject jcomponent, jobject jpeer, jlong jnativepeer)
719 {
720 CDropTarget* dropTarget = nil;
721
722 JNF_COCOA_ENTER(env);
723 id controlObj = (id) jlong_to_ptr(jnativepeer);
724 dropTarget = [[CDropTarget alloc] init:jdroptarget component:jcomponent peer:jpeer control:controlObj];
725 JNF_COCOA_EXIT(env);
726
727 if (dropTarget) {
728 CFRetain(dropTarget); // GC
729 [dropTarget release];
730 }
731 return ptr_to_jlong(dropTarget);
732 }
733
734 /*
735 * Class: sun_lwawt_macosx_CDropTarget
736 * Method: releaseNativeDropTarget
737 * Signature: (J)V
738 */
739 JNIEXPORT void JNICALL Java_sun_lwawt_macosx_CDropTarget_releaseNativeDropTarget
740 (JNIEnv *env, jobject jthis, jlong nativeDropTargetVal)
741 {
742 id dropTarget = (id)jlong_to_ptr(nativeDropTargetVal);
743
744 JNF_COCOA_ENTER(env);
745 [dropTarget removeFromView:env];
746 JNF_COCOA_EXIT(env);
747 }