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