1 /* 2 * Copyright (c) 2011, 2014, 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 "java_awt_dnd_DnDConstants.h" 29 30 #import <Cocoa/Cocoa.h> 31 #import <JavaNativeFoundation/JavaNativeFoundation.h> 32 33 #import "AWTEvent.h" 34 #import "AWTView.h" 35 #import "CDataTransferer.h" 36 #import "CDropTarget.h" 37 #import "CDragSource.h" 38 #import "DnDUtilities.h" 39 #import "ThreadUtilities.h" 40 41 42 // When sIsJavaDragging is true Java drag gesture has been recognized and a drag is/has been initialized. 43 // We must stop posting MouseEvent.MOUSE_DRAGGED events for the duration of the drag or all hell will break 44 // loose in shared code - tracking state going haywire. 45 static BOOL sIsJavaDragging; 46 47 48 @interface NSEvent(AWTAdditions) 49 50 + (void)javaDraggingBegin; 51 + (void)javaDraggingEnd; 52 53 @end 54 55 56 @implementation NSEvent(AWTAdditions) 57 58 59 + (void)javaDraggingBegin 60 { 61 sIsJavaDragging = YES; 62 } 63 64 + (void)javaDraggingEnd 65 { 66 // sIsJavaDragging is reset on mouseDown as well. 67 sIsJavaDragging = NO; 68 } 69 @end 70 71 JNF_CLASS_CACHE(DataTransfererClass, "sun/awt/datatransfer/DataTransferer"); 72 JNF_CLASS_CACHE(CDragSourceContextPeerClass, "sun/lwawt/macosx/CDragSourceContextPeer"); 73 JNF_CLASS_CACHE(CImageClass, "sun/lwawt/macosx/CImage"); 74 75 static NSDragOperation sDragOperation; 76 static NSPoint sDraggingLocation; 77 78 static BOOL sNeedsEnter; 79 80 @interface CDragSource () 81 // Updates from the destination to the source 82 - (void) postDragEnter; 83 - (void) postDragExit; 84 // Utility 85 - (NSPoint) mapNSScreenPointToJavaWithOffset:(NSPoint) point; 86 @end 87 88 @implementation CDragSource 89 90 - (id) init:(jobject)jDragSourceContextPeer 91 component:(jobject)jComponent 92 control:(id)control 93 transferable:(jobject)jTransferable 94 triggerEvent:(jobject)jTrigger 95 dragPosX:(jint)dragPosX 96 dragPosY:(jint)dragPosY 97 modifiers:(jint)extModifiers 98 clickCount:(jint)clickCount 99 timeStamp:(jlong)timeStamp 100 dragImage:(jlong)nsDragImagePtr 101 dragImageOffsetX:(jint)jDragImageOffsetX 102 dragImageOffsetY:(jint)jDragImageOffsetY 103 sourceActions:(jint)jSourceActions 104 formats:(jlongArray)jFormats 105 formatMap:(jobject)jFormatMap 106 { 107 self = [super init]; 108 DLog2(@"[CDragSource init]: %@\n", self); 109 110 fView = nil; 111 fComponent = nil; 112 113 // Construct the object if we have a valid model for it: 114 if (control != nil) { 115 fComponent = jComponent; 116 fDragSourceContextPeer = jDragSourceContextPeer; 117 fTransferable = jTransferable; 118 fTriggerEvent = jTrigger; 119 120 if (nsDragImagePtr) { 121 fDragImage = (NSImage*) jlong_to_ptr(nsDragImagePtr); 122 [fDragImage retain]; 123 } 124 125 fDragImageOffset = NSMakePoint(jDragImageOffsetX, jDragImageOffsetY); 126 127 fSourceActions = jSourceActions; 128 fFormats = jFormats; 129 fFormatMap = jFormatMap; 130 131 fTriggerEventTimeStamp = timeStamp; 132 fDragPos = NSMakePoint(dragPosX, dragPosY); 133 fClickCount = clickCount; 134 fModifiers = extModifiers; 135 136 // Set this object as a dragging source: 137 138 fView = [(AWTView *) control retain]; 139 [fView setDragSource:self]; 140 141 // Let AWTEvent know Java drag is getting underway: 142 [NSEvent javaDraggingBegin]; 143 } 144 145 else { 146 [self release]; 147 self = nil; 148 } 149 150 return self; 151 } 152 153 - (void)removeFromView:(JNIEnv *)env 154 { 155 DLog2(@"[CDragSource removeFromView]: %@\n", self); 156 157 // Remove this dragging source from the view: 158 [((AWTView *) fView) setDragSource:nil]; 159 160 // Clean up JNI refs 161 if (fComponent != NULL) { 162 JNFDeleteGlobalRef(env, fComponent); 163 fComponent = NULL; 164 } 165 166 if (fDragSourceContextPeer != NULL) { 167 JNFDeleteGlobalRef(env, fDragSourceContextPeer); 168 fDragSourceContextPeer = NULL; 169 } 170 171 if (fTransferable != NULL) { 172 JNFDeleteGlobalRef(env, fTransferable); 173 fTransferable = NULL; 174 } 175 176 if (fTriggerEvent != NULL) { 177 JNFDeleteGlobalRef(env, fTriggerEvent); 178 fTriggerEvent = NULL; 179 } 180 181 if (fFormats != NULL) { 182 JNFDeleteGlobalRef(env, fFormats); 183 fFormats = NULL; 184 } 185 186 if (fFormatMap != NULL) { 187 JNFDeleteGlobalRef(env, fFormatMap); 188 fFormatMap = NULL; 189 } 190 191 CFRelease(self); // GC 192 } 193 194 - (void)dealloc 195 { 196 DLog2(@"[CDragSource dealloc]: %@\n", self); 197 198 // Delete or release local data: 199 [fView release]; 200 fView = nil; 201 202 [fDragImage release]; 203 fDragImage = nil; 204 205 [super dealloc]; 206 } 207 //- (void)finalize { [super finalize]; } 208 209 210 // Appropriated from Windows' awt_DataTransferer.cpp: 211 // 212 // * NOTE: This returns a JNI Local Ref. Any code that calls must call DeleteLocalRef with the return value. 213 // 214 - (jobject)dataTransferer:(JNIEnv*)env 215 { 216 JNF_STATIC_MEMBER_CACHE(getInstanceMethod, DataTransfererClass, "getInstance", "()Lsun/awt/datatransfer/DataTransferer;"); 217 return JNFCallStaticObjectMethod(env, getInstanceMethod); 218 } 219 220 // Appropriated from Windows' awt_DataTransferer.cpp: 221 // 222 // * NOTE: This returns a JNI Local Ref. Any code that calls must call DeleteLocalRef with the return value. 223 // 224 - (jbyteArray)convertData:(jlong)format 225 { 226 JNIEnv* env = [ThreadUtilities getJNIEnv]; 227 jobject transferer = [self dataTransferer:env]; 228 jbyteArray data = nil; 229 230 if (transferer != NULL) { 231 JNF_MEMBER_CACHE(convertDataMethod, DataTransfererClass, "convertData", "(Ljava/lang/Object;Ljava/awt/datatransfer/Transferable;JLjava/util/Map;Z)[B"); 232 data = JNFCallObjectMethod(env, transferer, convertDataMethod, fComponent, fTransferable, format, fFormatMap, (jboolean) TRUE); 233 } 234 235 return data; 236 } 237 238 239 // Encodes a byte array of zero-terminated filenames into an NSArray of NSStrings representing them. 240 // Borrowed and adapted from awt_DataTransferer.c, convertFileType(). 241 - (id)getFileList:(jbyte *)jbytes dataLength:(jsize)jbytesLength 242 { 243 jsize strings = 0; 244 jsize i; 245 246 // Get number of filenames while making sure to skip over empty strings. 247 for (i = 1; i < jbytesLength; i++) { 248 if (jbytes[i] == '\0' && jbytes[i - 1] != '\0') 249 strings++; 250 } 251 252 // Create the file list to return: 253 NSMutableArray* fileList = [NSMutableArray arrayWithCapacity:strings]; 254 255 for (i = 0; i < jbytesLength; i++) { 256 char* start = (char *) &jbytes[i]; 257 258 // Skip over empty strings: 259 if (start[0] == '\0') { 260 continue; 261 } 262 263 // Update the position marker: 264 i += strlen(start); 265 266 // Add this filename to the file list: 267 NSMutableString* fileName = [NSMutableString stringWithUTF8String:start]; 268 // Decompose the filename 269 CFStringNormalize((CFMutableStringRef)fileName, kCFStringNormalizationFormD); 270 [fileList addObject:fileName]; 271 } 272 273 // 03-01-09 Note: keep this around for debugging. 274 // return [NSArray arrayWithObjects:@"/tmp/foo1", @"/tmp/foo2", nil]; 275 276 return ([fileList count] > 0 ? fileList : nil); 277 } 278 279 280 // Set up the pasteboard for dragging: 281 - (BOOL)declareTypesToPasteboard:(NSPasteboard *)pb withEnv:(JNIEnv *) env { 282 // 9-20-02 Note: leave this here for debugging: 283 //[pb declareTypes: [NSArray arrayWithObject: NSStringPboardType] owner: self]; 284 //return TRUE; 285 286 // Get byte array elements: 287 jboolean isCopy; 288 jlong* jformats = (*env)->GetLongArrayElements(env, fFormats, &isCopy); 289 if (jformats == nil) 290 return FALSE; 291 292 // Allocate storage arrays for dragging types to register with the pasteboard: 293 jsize formatsLength = (*env)->GetArrayLength(env, fFormats); 294 NSMutableArray* pbTypes = [[NSMutableArray alloc] initWithCapacity:formatsLength]; 295 296 // And assume there are no NS-type data: [Radar 3065621] 297 // This is to be able to drop transferables containing only a serialized object flavor, e.g.: 298 // "JAVA_DATAFLAVOR:application/x-java-serialized-object; class=java.awt.Label". 299 BOOL hasNSTypeData = false; 300 301 // Collect all supported types in a pasteboard format into the storage arrays: 302 jsize i; 303 for (i = 0; i < formatsLength; i++) { 304 jlong jformat = jformats[i]; 305 306 if (jformat >= 0) { 307 NSString* type = formatForIndex(jformat); 308 309 // Add element type to the storage array. 310 if (type != nil) { 311 if ([type hasPrefix:@"JAVA_DATAFLAVOR:application/x-java-jvm-local-objectref;"] == false) { 312 [pbTypes addObject:type]; 313 314 // This is a good approximation if not perfect. A conclusive search would 315 // have to be done matching all defined strings in AppKit's commonStrings.h. 316 if ([type hasPrefix:@"NS"] || [type hasPrefix:@"NeXT"]) 317 hasNSTypeData = true; 318 } 319 } 320 } 321 } 322 323 // 1-16-03 Note: [Radar 3065621] 324 // When TransferHandler is used with Swing components it puts only a type like this on the pasteboard: 325 // "JAVA_DATAFLAVOR:application/x-java-jvm-local-objectref; class=java.lang.String" 326 // And there's similar type for serialized object only transferables. 327 // Since our drop targets aren't trained for arbitrary data types yet we need to fake an empty string 328 // which will cause drop target handlers to fire. 329 // KCH - 3550405 If the drag is between Swing components, formatsLength == 0, so expand the check. 330 // Also, use a custom format rather than NSString, since that will prevent random views from accepting the drag 331 if (hasNSTypeData == false && formatsLength >= 0) { 332 [pbTypes addObject:[DnDUtilities javaPboardType]]; 333 } 334 335 (*env)->ReleaseLongArrayElements(env, fFormats, jformats, JNI_ABORT); 336 337 // Declare pasteboard types. If the types array is empty we still want to declare them 338 // as otherwise an old set of types/data would remain on the pasteboard. 339 NSUInteger typesCount = [pbTypes count]; 340 [pb declareTypes:pbTypes owner: self]; 341 342 // KCH - Lame conversion bug between Cocoa and Carbon drag types 343 // If I provide the filenames _right now_, NSFilenamesPboardType is properly converted to CoreDrag flavors 344 // If I try to wait until pasteboard:provideDataForType:, the conversion won't happen 345 // and pasteboard:provideDataForType: won't even get called! (unless I go over a Cocoa app) 346 if ([pbTypes containsObject:NSFilenamesPboardType]) { 347 [self pasteboard:pb provideDataForType:NSFilenamesPboardType]; 348 } 349 350 [pbTypes release]; 351 352 return typesCount > 0 ? TRUE : FALSE; 353 } 354 355 // This is an NSPasteboard callback. In declareTypesToPasteboard:withEnv:, we only declared the types 356 // When the AppKit DnD system actually needs the data, this method will be invoked. 357 // Note that if the transfer is handled entirely from Swing (as in a local-vm drag), this method may never be called. 358 - (void)pasteboard:(NSPasteboard *)pb provideDataForType:(NSString *)type { 359 AWT_ASSERT_APPKIT_THREAD; 360 361 // 9-20-02 Note: leave this here for debugging: 362 //[pb setString: @"Hello, World!" forType: NSStringPboardType]; 363 // return; 364 365 // Set up Java environment: 366 JNIEnv* env = [ThreadUtilities getJNIEnv]; 367 368 id pbData = nil; 369 370 // Collect data in a pasteboard format: 371 jlong jformat = indexForFormat(type); 372 if (jformat >= 0) { 373 // Convert DataTransfer data to a Java byte array: 374 // Note that this will eventually call getTransferData() 375 jbyteArray jdata = [self convertData:jformat]; 376 377 if (jdata != nil) { 378 jboolean isCopy; 379 jsize jdataLength = (*env)->GetArrayLength(env, jdata); 380 jbyte* jbytedata = (*env)->GetByteArrayElements(env, jdata, &isCopy); 381 382 if (jdataLength > 0 && jbytedata != nil) { 383 // Get element data to the storage array. For NSFilenamesPboardType type we use 384 // an NSArray-type data - NSData-type data would cause a crash. 385 if (type != nil) { 386 pbData = ([type isEqualTo:NSFilenamesPboardType]) ? 387 [self getFileList:jbytedata dataLength:jdataLength] : 388 [NSData dataWithBytes:jbytedata length:jdataLength]; 389 } 390 } 391 392 (*env)->ReleaseByteArrayElements(env, jdata, jbytedata, JNI_ABORT); 393 394 (*env)->DeleteLocalRef(env, jdata); 395 } 396 } 397 398 // If we are the custom type that matches local-vm drags, set an empty NSData 399 if ( (pbData == nil) && ([type isEqualTo:[DnDUtilities javaPboardType]]) ) { 400 pbData = [NSData dataWithBytes:"" length:1]; 401 } 402 403 // Add pasteboard data for the type: 404 // Remember, NSFilenamesPboardType's data is NSArray (property list), not NSData! 405 // We must use proper pb accessor depending on the data type. 406 if ([pbData isKindOfClass:[NSArray class]]) 407 [pb setPropertyList:pbData forType:type]; 408 else 409 [pb setData:pbData forType:type]; 410 } 411 412 413 - (void)validateDragImage 414 { 415 // Make a small blank image if we don't have a drag image: 416 if (fDragImage == nil) { 417 // 9-30-02 Note: keep this around for debugging: 418 fDragImage = [[NSImage alloc] initWithSize:NSMakeSize(21, 21)]; 419 NSSize imageSize = [fDragImage size]; 420 421 NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL 422 pixelsWide:imageSize.width pixelsHigh:imageSize.height bitsPerSample:8 samplesPerPixel:4 423 hasAlpha:YES isPlanar:NO colorSpaceName:NSCalibratedRGBColorSpace bytesPerRow:0 bitsPerPixel:32]; 424 425 [fDragImage addRepresentation:imageRep]; 426 fDragImageOffset = NSMakePoint(0, 0); 427 428 [imageRep release]; 429 } 430 } 431 432 - (NSEvent*)nsDragEvent:(BOOL)isDrag 433 { 434 // Get NSView for the drag source: 435 NSWindow* window = [fView window]; 436 437 NSInteger windowNumber = [window windowNumber]; 438 NSGraphicsContext* graphicsContext = [NSGraphicsContext graphicsContextWithWindow:window]; 439 440 // Convert mouse coordinates to NS: 441 NSPoint eventLocation = [fView convertPoint:NSMakePoint(fDragPos.x, fDragPos.y) toView:nil]; 442 eventLocation.y = [[fView window] frame].size.height - eventLocation.y; 443 444 // Convert fTriggerEventTimeStamp to NS - AWTEvent.h defines UTC(nsEvent) as ((jlong)[event timestamp] * 1000): 445 NSTimeInterval timeStamp = fTriggerEventTimeStamp / 1000; 446 447 // Convert fModifiers (extModifiers) to NS: 448 NSEventType mouseButtons = 0; 449 float pressure = 0.0; 450 if (isDrag) { 451 mouseButtons = (NSEventType) [DnDUtilities mapJavaExtModifiersToNSMouseDownButtons:fModifiers]; 452 pressure = 1.0; 453 } else { 454 mouseButtons = (NSEventType) [DnDUtilities mapJavaExtModifiersToNSMouseUpButtons:fModifiers]; 455 } 456 457 // Convert fModifiers (extModifiers) to NS: 458 NSUInteger modifiers = JavaModifiersToNsKeyModifiers(fModifiers, TRUE); 459 460 // Just a dummy value ... 461 NSInteger eventNumber = 0; 462 463 // Make a native autoreleased dragging event: 464 NSEvent* dragEvent = [NSEvent mouseEventWithType:mouseButtons location:eventLocation 465 modifierFlags:modifiers timestamp:timeStamp windowNumber:windowNumber context:graphicsContext 466 eventNumber:eventNumber clickCount:fClickCount pressure:pressure]; 467 468 return dragEvent; 469 } 470 471 - (void)doDrag 472 { 473 AWT_ASSERT_APPKIT_THREAD; 474 475 DLog2(@"[CDragSource doDrag]: %@\n", self); 476 477 // Set up Java environment: 478 JNIEnv *env = [ThreadUtilities getJNIEnv]; 479 480 // Set up the pasteboard: 481 NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSDragPboard]; 482 [self declareTypesToPasteboard:pb withEnv:env]; 483 484 // Make a native autoreleased NS dragging event: 485 NSEvent *dragEvent = [self nsDragEvent:YES]; 486 487 // Get NSView for the drag source: 488 NSView *view = fView; 489 490 // Make sure we have a valid drag image: 491 [self validateDragImage]; 492 NSImage* dragImage = fDragImage; 493 494 // Get drag origin and offset: 495 NSPoint dragOrigin = [dragEvent locationInWindow]; 496 dragOrigin.x += fDragImageOffset.x; 497 dragOrigin.y -= fDragImageOffset.y + [dragImage size].height; 498 499 // Drag offset values don't seem to matter: 500 NSSize dragOffset = NSMakeSize(0, 0); 501 502 // These variables should be set based on the transferable: 503 BOOL isFileDrag = FALSE; 504 BOOL fileDragPromises = FALSE; 505 506 DLog(@"[CDragSource drag]: calling dragImage/File:"); 507 DLog3(@" - drag origin: %f, %f", fDragPos.x, fDragPos.y); 508 DLog5(@" - drag image: %f, %f (%f x %f)", fDragImageOffset.x, fDragImageOffset.y, [dragImage size].width, [dragImage size].height); 509 DLog3(@" - event point (window) %f, %f", [dragEvent locationInWindow].x, [dragEvent locationInWindow].y); 510 DLog3(@" - drag point (view) %f, %f", dragOrigin.x, dragOrigin.y); 511 // Set up the fDragKeyModifier, so we know if the operation has changed 512 // Set up the fDragMouseModifier, so we can |= it later (since CoreDrag doesn't tell us mouse states during a drag) 513 fDragKeyModifiers = [DnDUtilities extractJavaExtKeyModifiersFromJavaExtModifiers:fModifiers]; 514 fDragMouseModifiers = [DnDUtilities extractJavaExtMouseModifiersFromJavaExtModifiers:fModifiers]; 515 516 sNeedsEnter = YES; 517 518 @try { 519 // Data dragging: 520 if (isFileDrag == FALSE) { 521 [view dragImage:dragImage at:dragOrigin offset:dragOffset event:dragEvent pasteboard:pb source:view slideBack:YES]; 522 } else if (fileDragPromises == FALSE) { 523 // File dragging: 524 NSLog(@"[CDragSource drag]: file dragging is unsupported."); 525 NSString* fileName = nil; // This should be set based on the transferable. 526 NSRect fileLocationRect = NSMakeRect(0, 0, 0, 0); // This should be set based on the filename. 527 528 BOOL success = [view dragFile:fileName fromRect:fileLocationRect slideBack:YES event:dragEvent]; 529 if (success == TRUE) { // One would erase dragged file if this was a move operation. 530 } 531 } else { 532 // Promised file dragging: 533 NSLog(@"[CDragSource drag]: file dragging promises are unsupported."); 534 NSArray* fileTypesArray = nil; // This should be set based on the transferable. 535 NSRect fileLocationRect = NSMakeRect(0, 0, 0, 0); // This should be set based on all filenames. 536 537 BOOL success = [view dragPromisedFilesOfTypes:fileTypesArray fromRect:fileLocationRect source:view slideBack:YES event:dragEvent]; 538 if (success == TRUE) { // One would write out the promised files here. 539 } 540 } 541 542 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 543 544 // Convert drag operation to Java: 545 jint dragOp = [DnDUtilities mapNSDragOperationToJava:sDragOperation]; 546 547 // Drag success must acount for DragOperationNone: 548 jboolean success = (dragOp != java_awt_dnd_DnDConstants_ACTION_NONE); 549 550 // We have a problem here... we don't send DragSource dragEnter/Exit messages outside of our own process 551 // because we don't get anything from AppKit/CoreDrag 552 // This means that if you drag outside of the app and drop, even if it's valid, a dragDropFinished is posted without dragEnter 553 // I'm worried that this might confuse Java, so we're going to send a "bogus" dragEnter if necessary (only if the drag succeeded) 554 if (success && sNeedsEnter) { 555 [self postDragEnter]; 556 } 557 558 // DragSourceContextPeer.dragDropFinished() should be called even if there was an error: 559 JNF_MEMBER_CACHE(dragDropFinishedMethod, CDragSourceContextPeerClass, "dragDropFinished", "(ZIII)V"); 560 DLog3(@" -> posting dragDropFinished, point %f, %f", point.x, point.y); 561 JNFCallVoidMethod(env, fDragSourceContextPeer, dragDropFinishedMethod, success, dragOp, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 562 JNF_MEMBER_CACHE(resetHoveringMethod, CDragSourceContextPeerClass, "resetHovering", "()V"); 563 JNFCallVoidMethod(env, fDragSourceContextPeer, resetHoveringMethod); // Hust reset static variable 564 } @finally { 565 sNeedsEnter = NO; 566 } 567 568 // We have to do this, otherwise AppKit doesn't know we're finished dragging. Yup, it's that bad. 569 if ([[[NSRunLoop currentRunLoop] currentMode] isEqualTo:NSEventTrackingRunLoopMode]) { 570 [NSApp postEvent:[self nsDragEvent:NO] atStart:YES]; 571 } 572 573 DLog2(@"[CDragSource doDrag] end: %@\n", self); 574 } 575 576 - (void)drag 577 { 578 AWT_ASSERT_NOT_APPKIT_THREAD; 579 580 [self performSelectorOnMainThread:@selector(doDrag) withObject:nil waitUntilDone:YES]; // AWT_THREADING Safe (called from unique asynchronous thread) 581 } 582 583 /******************************** BEGIN NSDraggingSource Interface ********************************/ 584 585 - (void)draggingOperationChanged:(NSDragOperation)dragOp { 586 //DLog2(@"[CDragSource draggingOperationChanged]: %@\n", self); 587 588 JNIEnv* env = [ThreadUtilities getJNIEnv]; 589 590 jint targetActions = fSourceActions; 591 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 592 593 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 594 DLog3(@" -> posting operationChanged, point %f, %f", point.x, point.y); 595 jint modifiedModifiers = fDragKeyModifiers | fDragMouseModifiers | [DnDUtilities javaKeyModifiersForNSDragOperation:dragOp]; 596 597 JNF_MEMBER_CACHE(operationChangedMethod, CDragSourceContextPeerClass, "operationChanged", "(IIII)V"); 598 JNFCallVoidMethod(env, fDragSourceContextPeer, operationChangedMethod, targetActions, modifiedModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 599 } 600 601 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)localDrag { 602 //DLog2(@"[CDragSource draggingSourceOperationMaskForLocal]: %@\n", self); 603 return [DnDUtilities mapJavaDragOperationToNS:fSourceActions]; 604 } 605 606 /* 9-16-02 Note: we don't support promises yet. 607 - (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination { 608 }*/ 609 610 - (void)draggedImage:(NSImage *)image beganAt:(NSPoint)screenPoint { 611 DLog4(@"[CDragSource draggedImage beganAt]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 612 613 // Initialize static variables: 614 sDragOperation = NSDragOperationNone; 615 sDraggingLocation = screenPoint; 616 } 617 618 - (void)draggedImage:(NSImage *)image endedAt:(NSPoint)screenPoint operation:(NSDragOperation)operation { 619 DLog4(@"[CDragSource draggedImage endedAt:]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 620 621 sDraggingLocation = screenPoint; 622 sDragOperation = operation; 623 } 624 625 - (void)draggedImage:(NSImage *)image movedTo:(NSPoint)screenPoint { 626 //DLog4(@"[CDragSource draggedImage moved]: (%d, %d) %@\n", (int) screenPoint.x, (int) screenPoint.y, self); 627 JNIEnv* env = [ThreadUtilities getJNIEnv]; 628 629 JNF_COCOA_ENTER(env); 630 // There are two things we would be interested in: 631 // a) mouse pointer has moved 632 // b) drag actions (key modifiers) have changed 633 634 BOOL notifyJava = FALSE; 635 636 // a) mouse pointer has moved: 637 if (NSEqualPoints(screenPoint, sDraggingLocation) == FALSE) { 638 //DLog2(@"[CDragSource draggedImage:movedTo]: mouse moved, %@\n", self); 639 notifyJava = TRUE; 640 } 641 642 // b) drag actions (key modifiers) have changed: 643 jint modifiers = NsKeyModifiersToJavaModifiers([NSEvent modifierFlags], YES); 644 if (fDragKeyModifiers != modifiers) { 645 NSDragOperation currentOp = [DnDUtilities nsDragOperationForModifiers:[NSEvent modifierFlags]]; 646 NSDragOperation allowedOp = [DnDUtilities mapJavaDragOperationToNS:fSourceActions] & currentOp; 647 648 fDragKeyModifiers = modifiers; 649 650 if (sDragOperation != allowedOp) { 651 sDragOperation = allowedOp; 652 [self draggingOperationChanged:allowedOp]; 653 } 654 } 655 656 // Should we notify Java things have changed? 657 if (notifyJava) { 658 sDraggingLocation = screenPoint; 659 660 NSPoint point = [self mapNSScreenPointToJavaWithOffset:screenPoint]; 661 662 jint targetActions = fSourceActions; 663 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 664 665 // Motion: dragMotion, dragMouseMoved 666 DLog4(@"[CDragSource draggedImage moved]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 667 668 DLog3(@" -> posting dragMotion, point %f, %f", point.x, point.y); 669 JNF_MEMBER_CACHE(dragMotionMethod, CDragSourceContextPeerClass, "dragMotion", "(IIII)V"); 670 JNFCallVoidMethod(env, fDragSourceContextPeer, dragMotionMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 671 672 DLog3(@" -> posting dragMouseMoved, point %f, %f", point.x, point.y); 673 JNF_MEMBER_CACHE(dragMouseMovedMethod, CDragSourceContextPeerClass, "dragMouseMoved", "(IIII)V"); 674 JNFCallVoidMethod(env, fDragSourceContextPeer, dragMouseMovedMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 675 } 676 JNF_COCOA_EXIT(env); 677 } 678 679 - (BOOL)ignoreModifierKeysWhileDragging { 680 //DLog2(@"[CDragSource ignoreModifierKeysWhileDragging]: %@\n", self); 681 return NO; 682 } 683 684 /******************************** END NSDraggingSource Interface ********************************/ 685 686 687 // postDragEnter and postDragExit are called from CDropTarget when possible and appropriate 688 // Currently only possible if source and target are in the same process 689 - (void) postDragEnter { 690 JNIEnv *env = [ThreadUtilities getJNIEnv]; 691 sNeedsEnter = NO; 692 693 jint targetActions = fSourceActions; 694 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 695 696 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 697 DLog3(@" -> posting dragEnter, point %f, %f", point.x, point.y); 698 JNF_MEMBER_CACHE(dragEnterMethod, CDragSourceContextPeerClass, "dragEnter", "(IIII)V"); 699 JNFCallVoidMethod(env, fDragSourceContextPeer, dragEnterMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 700 } 701 702 - (void) postDragExit { 703 JNIEnv *env = [ThreadUtilities getJNIEnv]; 704 sNeedsEnter = YES; 705 706 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 707 DLog3(@" -> posting dragExit, point %f, %f", point.x, point.y); 708 JNF_MEMBER_CACHE(dragExitMethod, CDragSourceContextPeerClass, "dragExit", "(II)V"); 709 JNFCallVoidMethod(env, fDragSourceContextPeer, dragExitMethod, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 710 } 711 712 713 // Java assumes that the origin is the top-left corner of the screen. 714 // Cocoa assumes that the origin is the bottom-left corner of the screen. 715 // Adjust the y coordinate to account for this. 716 // NOTE: Also need to take into account the 0 screen relative screen coords. 717 // This is because all screen coords in Cocoa are relative to the 0 screen. 718 // Also see +[CWindow convertAWTToCocoaScreenRect] 719 // NSScreen-to-JavaScreen mapping: 720 - (NSPoint) mapNSScreenPointToJavaWithOffset:(NSPoint)screenPoint { 721 NSRect mainR = [[[NSScreen screens] objectAtIndex:0] frame]; 722 NSPoint point = NSMakePoint(screenPoint.x, mainR.size.height - (screenPoint.y)); 723 724 // Adjust the point with the drag image offset to get the real mouse hotspot: 725 // The point should remain in screen coordinates (as per DragSourceEvent.getLocation() documentation) 726 point.x -= fDragImageOffset.x; 727 point.y -= ([fDragImage size].height + fDragImageOffset.y); 728 729 return point; 730 } 731 732 @end