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 "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 74 static NSDragOperation sDragOperation; 75 static NSPoint sDraggingLocation; 76 77 static CDragSource* sCurrentDragSource; 78 static BOOL sNeedsEnter; 79 80 @implementation CDragSource 81 82 + (CDragSource *) currentDragSource { 83 return sCurrentDragSource; 84 } 85 86 - (id)init:(jobject)jdragsourcecontextpeer component:(jobject)jcomponent peer:(jobject)jpeer control:(id)control 87 transferable:(jobject)jtransferable triggerEvent:(jobject)jtrigger 88 dragPosX:(jint)dragPosX dragPosY:(jint)dragPosY modifiers:(jint)extModifiers clickCount:(jint)clickCount 89 timeStamp:(jlong)timeStamp cursor:(jobject)jcursor 90 dragImage:(jlong)jnsdragimage dragImageOffsetX:(jint)jdragimageoffsetx dragImageOffsetY:(jint)jdragimageoffsety 91 sourceActions:(jint)jsourceactions formats:(jlongArray)jformats formatMap:(jobject)jformatmap 92 { 93 self = [super init]; 94 DLog2(@"[CDragSource init]: %@\n", self); 95 96 fView = nil; 97 fComponent = nil; 98 99 // Construct the object if we have a valid model for it: 100 if (control != nil) { 101 JNIEnv *env = [ThreadUtilities getJNIEnv]; 102 fComponent = JNFNewGlobalRef(env, jcomponent); 103 fComponentPeer = JNFNewGlobalRef(env, jpeer); 104 fDragSourceContextPeer = JNFNewGlobalRef(env, jdragsourcecontextpeer); 105 106 fTransferable = JNFNewGlobalRef(env, jtransferable); 107 fTriggerEvent = JNFNewGlobalRef(env, jtrigger); 108 fCursor = JNFNewGlobalRef(env, jcursor); 109 110 fDragImage = (NSImage*) jlong_to_ptr(jnsdragimage); // Double-casting prevents compiler 'different size' warning. 111 [fDragImage retain]; 112 fDragImageOffset = NSMakePoint(jdragimageoffsetx, jdragimageoffsety); 113 114 fSourceActions = jsourceactions; 115 fFormats = JNFNewGlobalRef(env, jformats); 116 fFormatMap = JNFNewGlobalRef(env, jformatmap); 117 118 fTriggerEventTimeStamp = timeStamp; 119 fDragPos = NSMakePoint(dragPosX, dragPosY); 120 fClickCount = clickCount; 121 fModifiers = extModifiers; 122 123 // Set this object as a dragging source: 124 125 AWTView *awtView = [((NSWindow *) control) contentView]; 126 fView = [awtView retain]; 127 [awtView setDragSource:self]; 128 129 // Let AWTEvent know Java drag is getting underway: 130 [NSEvent javaDraggingBegin]; 131 } 132 133 else { 134 [self release]; 135 self = nil; 136 } 137 138 return self; 139 } 140 141 - (void)removeFromView:(JNIEnv *)env 142 { 143 DLog2(@"[CDragSource removeFromView]: %@\n", self); 144 145 // Remove this dragging source from the view: 146 [((AWTView *) fView) setDragSource:nil]; 147 148 // Clean up JNI refs 149 if (fComponent != NULL) { 150 JNFDeleteGlobalRef(env, fComponent); 151 fComponent = NULL; 152 } 153 154 if (fComponentPeer != NULL) { 155 JNFDeleteGlobalRef(env, fComponentPeer); 156 fComponentPeer = NULL; 157 } 158 159 if (fDragSourceContextPeer != NULL) { 160 JNFDeleteGlobalRef(env, fDragSourceContextPeer); 161 fDragSourceContextPeer = NULL; 162 } 163 164 if (fTransferable != NULL) { 165 JNFDeleteGlobalRef(env, fTransferable); 166 fTransferable = NULL; 167 } 168 169 if (fTriggerEvent != NULL) { 170 JNFDeleteGlobalRef(env, fTriggerEvent); 171 fTriggerEvent = NULL; 172 } 173 174 if (fCursor != NULL) { 175 JNFDeleteGlobalRef(env, fCursor); 176 fCursor = NULL; 177 } 178 179 if (fFormats != NULL) { 180 JNFDeleteGlobalRef(env, fFormats); 181 fFormats = NULL; 182 } 183 184 if (fFormatMap != NULL) { 185 JNFDeleteGlobalRef(env, fFormatMap); 186 fFormatMap = NULL; 187 } 188 189 CFRelease(self); // GC 190 } 191 192 - (void)dealloc 193 { 194 DLog2(@"[CDragSource dealloc]: %@\n", self); 195 196 // Delete or release local data: 197 [fView release]; 198 fView = nil; 199 200 [fDragImage release]; 201 fDragImage = nil; 202 203 [super dealloc]; 204 } 205 //- (void)finalize { [super finalize]; } 206 207 208 // Appropriated from Windows' awt_DataTransferer.cpp: 209 // 210 // * NOTE: This returns a JNI Local Ref. Any code that calls must call DeleteLocalRef with the return value. 211 // 212 - (jobject)dataTransferer:(JNIEnv*)env 213 { 214 JNF_STATIC_MEMBER_CACHE(getInstanceMethod, DataTransfererClass, "getInstance", "()Lsun/awt/datatransfer/DataTransferer;"); 215 return JNFCallStaticObjectMethod(env, getInstanceMethod); 216 } 217 218 // Appropriated from Windows' awt_DataTransferer.cpp: 219 // 220 // * NOTE: This returns a JNI Local Ref. Any code that calls must call DeleteLocalRef with the return value. 221 // 222 - (jbyteArray)convertData:(jlong)format 223 { 224 JNIEnv* env = [ThreadUtilities getJNIEnv]; 225 jobject transferer = [self dataTransferer:env]; 226 jbyteArray data = nil; 227 228 if (transferer != NULL) { 229 JNF_MEMBER_CACHE(convertDataMethod, DataTransfererClass, "convertData", "(Ljava/lang/Object;Ljava/awt/datatransfer/Transferable;JLjava/util/Map;Z)[B"); 230 data = JNFCallObjectMethod(env, transferer, convertDataMethod, fComponent, fTransferable, format, fFormatMap, (jboolean) TRUE); 231 } 232 233 return data; 234 } 235 236 237 // Encodes a byte array of zero-terminated filenames into an NSArray of NSStrings representing them. 238 // Borrowed and adapted from awt_DataTransferer.c, convertFileType(). 239 - (id)getFileList:(jbyte *)jbytes dataLength:(jsize)jbytesLength 240 { 241 jsize strings = 0; 242 jsize i; 243 244 // Get number of filenames while making sure to skip over empty strings. 245 for (i = 1; i < jbytesLength; i++) { 246 if (jbytes[i] == '\0' && jbytes[i - 1] != '\0') 247 strings++; 248 } 249 250 // Create the file list to return: 251 NSMutableArray* fileList = [NSMutableArray arrayWithCapacity:strings]; 252 253 for (i = 0; i < jbytesLength; i++) { 254 char* start = (char *) &jbytes[i]; 255 256 // Skip over empty strings: 257 if (start[0] == '\0') { 258 continue; 259 } 260 261 // Update the position marker: 262 i += strlen(start); 263 264 // Add this filename to the file list: 265 NSMutableString* fileName = [NSMutableString stringWithUTF8String:start]; 266 // Decompose the filename 267 CFStringNormalize((CFMutableStringRef)fileName, kCFStringNormalizationFormD); 268 [fileList addObject:fileName]; 269 } 270 271 // 03-01-09 Note: keep this around for debugging. 272 // return [NSArray arrayWithObjects:@"/tmp/foo1", @"/tmp/foo2", nil]; 273 274 return ([fileList count] > 0 ? fileList : nil); 275 } 276 277 278 // Set up the pasteboard for dragging: 279 - (BOOL)declareTypesToPasteboard:(NSPasteboard *)pb withEnv:(JNIEnv *) env { 280 // 9-20-02 Note: leave this here for debugging: 281 //[pb declareTypes: [NSArray arrayWithObject: NSStringPboardType] owner: self]; 282 //return TRUE; 283 284 // Get byte array elements: 285 jboolean isCopy; 286 jlong* jformats = (*env)->GetLongArrayElements(env, fFormats, &isCopy); 287 if (jformats == nil) 288 return FALSE; 289 290 // Allocate storage arrays for dragging types to register with the pasteboard: 291 jsize formatsLength = (*env)->GetArrayLength(env, fFormats); 292 NSMutableArray* pbTypes = [[NSMutableArray alloc] initWithCapacity:formatsLength]; 293 294 // And assume there are no NS-type data: [Radar 3065621] 295 // This is to be able to drop transferables containing only a serialized object flavor, e.g.: 296 // "JAVA_DATAFLAVOR:application/x-java-serialized-object; class=java.awt.Label". 297 BOOL hasNSTypeData = false; 298 299 // Collect all supported types in a pasteboard format into the storage arrays: 300 jsize i; 301 for (i = 0; i < formatsLength; i++) { 302 jlong jformat = jformats[i]; 303 304 if (jformat >= 0) { 305 NSString* type = formatForIndex(jformat); 306 307 // Add element type to the storage array. 308 if (type != nil) { 309 if ([type hasPrefix:@"JAVA_DATAFLAVOR:application/x-java-jvm-local-objectref;"] == false) { 310 [pbTypes addObject:type]; 311 312 // This is a good approximation if not perfect. A conclusive search would 313 // have to be done matching all defined strings in AppKit's commonStrings.h. 314 if ([type hasPrefix:@"NS"] || [type hasPrefix:@"NeXT"]) 315 hasNSTypeData = true; 316 } 317 } 318 } 319 } 320 321 // 1-16-03 Note: [Radar 3065621] 322 // When TransferHandler is used with Swing components it puts only a type like this on the pasteboard: 323 // "JAVA_DATAFLAVOR:application/x-java-jvm-local-objectref; class=java.lang.String" 324 // And there's similar type for serialized object only transferables. 325 // Since our drop targets aren't trained for arbitrary data types yet we need to fake an empty string 326 // which will cause drop target handlers to fire. 327 // KCH - 3550405 If the drag is between Swing components, formatsLength == 0, so expand the check. 328 // Also, use a custom format rather than NSString, since that will prevent random views from accepting the drag 329 if (hasNSTypeData == false && formatsLength >= 0) { 330 [pbTypes addObject:[DnDUtilities javaPboardType]]; 331 } 332 333 (*env)->ReleaseLongArrayElements(env, fFormats, jformats, JNI_ABORT); 334 335 // Declare pasteboard types. If the types array is empty we still want to declare them 336 // as otherwise an old set of types/data would remain on the pasteboard. 337 NSUInteger typesCount = [pbTypes count]; 338 [pb declareTypes:pbTypes owner: self]; 339 340 // KCH - Lame conversion bug between Cocoa and Carbon drag types 341 // If I provide the filenames _right now_, NSFilenamesPboardType is properly converted to CoreDrag flavors 342 // If I try to wait until pasteboard:provideDataForType:, the conversion won't happen 343 // and pasteboard:provideDataForType: won't even get called! (unless I go over a Cocoa app) 344 if ([pbTypes containsObject:NSFilenamesPboardType]) { 345 [self pasteboard:pb provideDataForType:NSFilenamesPboardType]; 346 } 347 348 [pbTypes release]; 349 350 return typesCount > 0 ? TRUE : FALSE; 351 } 352 353 // This is an NSPasteboard callback. In declareTypesToPasteboard:withEnv:, we only declared the types 354 // When the AppKit DnD system actually needs the data, this method will be invoked. 355 // Note that if the transfer is handled entirely from Swing (as in a local-vm drag), this method may never be called. 356 - (void)pasteboard:(NSPasteboard *)pb provideDataForType:(NSString *)type { 357 AWT_ASSERT_APPKIT_THREAD; 358 359 // 9-20-02 Note: leave this here for debugging: 360 //[pb setString: @"Hello, World!" forType: NSStringPboardType]; 361 // return; 362 363 // Set up Java environment: 364 JNIEnv* env = [ThreadUtilities getJNIEnv]; 365 366 id pbData = nil; 367 368 // Collect data in a pasteboard format: 369 jlong jformat = indexForFormat(type); 370 if (jformat >= 0) { 371 // Convert DataTransfer data to a Java byte array: 372 // Note that this will eventually call getTransferData() 373 jbyteArray jdata = [self convertData:jformat]; 374 375 if (jdata != nil) { 376 jboolean isCopy; 377 jsize jdataLength = (*env)->GetArrayLength(env, jdata); 378 jbyte* jbytedata = (*env)->GetByteArrayElements(env, jdata, &isCopy); 379 380 if (jdataLength > 0 && jbytedata != nil) { 381 // Get element data to the storage array. For NSFilenamesPboardType type we use 382 // an NSArray-type data - NSData-type data would cause a crash. 383 if (type != nil) { 384 pbData = ([type isEqualTo:NSFilenamesPboardType]) ? 385 [self getFileList:jbytedata dataLength:jdataLength] : 386 [NSData dataWithBytes:jbytedata length:jdataLength]; 387 } 388 } 389 390 (*env)->ReleaseByteArrayElements(env, jdata, jbytedata, JNI_ABORT); 391 392 (*env)->DeleteLocalRef(env, jdata); 393 } 394 } 395 396 // If we are the custom type that matches local-vm drags, set an empty NSData 397 if ( (pbData == nil) && ([type isEqualTo:[DnDUtilities javaPboardType]]) ) { 398 pbData = [NSData dataWithBytes:"" length:1]; 399 } 400 401 // Add pasteboard data for the type: 402 // Remember, NSFilenamesPboardType's data is NSArray (property list), not NSData! 403 // We must use proper pb accessor depending on the data type. 404 if ([pbData isKindOfClass:[NSArray class]]) 405 [pb setPropertyList:pbData forType:type]; 406 else 407 [pb setData:pbData forType:type]; 408 } 409 410 411 - (void)validateDragImage 412 { 413 // Make a small blank image if we don't have a drag image: 414 if (fDragImage == nil) { 415 // 9-30-02 Note: keep this around for debugging: 416 fDragImage = [[NSImage alloc] initWithSize:NSMakeSize(21, 21)]; 417 NSSize imageSize = [fDragImage size]; 418 419 NSBitmapImageRep *imageRep = [[NSBitmapImageRep alloc] initWithBitmapDataPlanes:NULL 420 pixelsWide:imageSize.width pixelsHigh:imageSize.height bitsPerSample:8 samplesPerPixel:4 421 hasAlpha:YES isPlanar:NO colorSpaceName:NSCalibratedRGBColorSpace bytesPerRow:0 bitsPerPixel:32]; 422 423 [fDragImage addRepresentation:imageRep]; 424 fDragImageOffset = NSMakePoint(0, 0); 425 426 [imageRep release]; 427 } 428 } 429 430 - (NSEvent*)nsDragEvent:(BOOL)isDrag 431 { 432 // Get NSView for the drag source: 433 NSWindow* window = [fView window]; 434 435 NSInteger windowNumber = [window windowNumber]; 436 NSGraphicsContext* graphicsContext = [NSGraphicsContext graphicsContextWithWindow:window]; 437 438 // Convert mouse coordinates to NS: 439 NSPoint location = NSMakePoint(fDragPos.x, fDragPos.y); 440 NSPoint eventLocation = [fView convertPoint:location toView:nil]; 441 442 // Convert fTriggerEventTimeStamp to NS - AWTEvent.h defines UTC(nsEvent) as ((jlong)[event timestamp] * 1000): 443 NSTimeInterval timeStamp = fTriggerEventTimeStamp / 1000; 444 445 // Convert fModifiers (extModifiers) to NS: 446 NSEventType mouseButtons = 0; 447 float pressure = 0.0; 448 if (isDrag) { 449 mouseButtons = (NSEventType) [DnDUtilities mapJavaExtModifiersToNSMouseDownButtons:fModifiers]; 450 pressure = 1.0; 451 } else { 452 mouseButtons = (NSEventType) [DnDUtilities mapJavaExtModifiersToNSMouseUpButtons:fModifiers]; 453 } 454 455 // Convert fModifiers (extModifiers) to NS: 456 NSUInteger modifiers = [DnDUtilities mapJavaExtModifiersToNSKeyModifiers:fModifiers]; 457 458 // Just a dummy value ... 459 NSInteger eventNumber = 0; 460 461 // Make a native autoreleased dragging event: 462 NSEvent* dragEvent = [NSEvent mouseEventWithType:mouseButtons location:eventLocation 463 modifierFlags:modifiers timestamp:timeStamp windowNumber:windowNumber context:graphicsContext 464 eventNumber:eventNumber clickCount:fClickCount pressure:pressure]; 465 466 return dragEvent; 467 } 468 469 - (void)doDrag 470 { 471 AWT_ASSERT_APPKIT_THREAD; 472 473 DLog2(@"[CDragSource doDrag]: %@\n", self); 474 475 // Set up Java environment: 476 JNIEnv *env = [ThreadUtilities getJNIEnv]; 477 478 // Set up the pasteboard: 479 NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSDragPboard]; 480 [self declareTypesToPasteboard:pb withEnv:env]; 481 482 // Make a native autoreleased NS dragging event: 483 NSEvent *dragEvent = [self nsDragEvent:YES]; 484 485 // Get NSView for the drag source: 486 NSView *view = fView; 487 488 // Make sure we have a valid drag image: 489 [self validateDragImage]; 490 NSImage* dragImage = fDragImage; 491 492 // Get drag origin and offset: 493 NSPoint dragOrigin; 494 dragOrigin.x = fDragPos.x; 495 dragOrigin.y = fDragPos.y; 496 dragOrigin = [view convertPoint:[dragEvent locationInWindow] fromView:nil]; 497 dragOrigin.x += fDragImageOffset.x; 498 dragOrigin.y += [dragImage size].height + fDragImageOffset.y; 499 500 // Drag offset values don't seem to matter: 501 NSSize dragOffset = NSMakeSize(0, 0); 502 503 // These variables should be set based on the transferable: 504 BOOL isFileDrag = FALSE; 505 BOOL fileDragPromises = FALSE; 506 507 DLog(@"[CDragSource drag]: calling dragImage/File:"); 508 DLog3(@" - drag origin: %f, %f", fDragPos.x, fDragPos.y); 509 DLog5(@" - drag image: %f, %f (%f x %f)", fDragImageOffset.x, fDragImageOffset.y, [dragImage size].width, [dragImage size].height); 510 DLog3(@" - event point (window) %f, %f", [dragEvent locationInWindow].x, [dragEvent locationInWindow].y); 511 DLog3(@" - drag point (view) %f, %f", dragOrigin.x, dragOrigin.y); 512 513 // Set up the fDragKeyModifier, so we know if the operation has changed 514 // Set up the fDragMouseModifier, so we can |= it later (since CoreDrag doesn't tell us mouse states during a drag) 515 fDragKeyModifiers = [DnDUtilities extractJavaExtKeyModifiersFromJavaExtModifiers:fModifiers]; 516 fDragMouseModifiers = [DnDUtilities extractJavaExtMouseModifiersFromJavaExtModifiers:fModifiers]; 517 518 // Set the current DragSource 519 sCurrentDragSource = self; 520 sNeedsEnter = YES; 521 522 @try { 523 // Data dragging: 524 if (isFileDrag == FALSE) { 525 [view dragImage:dragImage at:dragOrigin offset:dragOffset event:dragEvent pasteboard:pb source:view slideBack:YES]; 526 } else if (fileDragPromises == FALSE) { 527 // File dragging: 528 NSLog(@"[CDragSource drag]: file dragging is unsupported."); 529 NSString* fileName = nil; // This should be set based on the transferable. 530 NSRect fileLocationRect = NSMakeRect(0, 0, 0, 0); // This should be set based on the filename. 531 532 BOOL success = [view dragFile:fileName fromRect:fileLocationRect slideBack:YES event:dragEvent]; 533 if (success == TRUE) { // One would erase dragged file if this was a move operation. 534 } 535 } else { 536 // Promised file dragging: 537 NSLog(@"[CDragSource drag]: file dragging promises are unsupported."); 538 NSArray* fileTypesArray = nil; // This should be set based on the transferable. 539 NSRect fileLocationRect = NSMakeRect(0, 0, 0, 0); // This should be set based on all filenames. 540 541 BOOL success = [view dragPromisedFilesOfTypes:fileTypesArray fromRect:fileLocationRect source:view slideBack:YES event:dragEvent]; 542 if (success == TRUE) { // One would write out the promised files here. 543 } 544 } 545 546 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 547 548 // Convert drag operation to Java: 549 jint dragOp = [DnDUtilities mapNSDragOperationToJava:sDragOperation]; 550 551 // Drag success must acount for DragOperationNone: 552 jboolean success = (dragOp != java_awt_dnd_DnDConstants_ACTION_NONE); 553 554 // We have a problem here... we don't send DragSource dragEnter/Exit messages outside of our own process 555 // because we don't get anything from AppKit/CoreDrag 556 // This means that if you drag outside of the app and drop, even if it's valid, a dragDropFinished is posted without dragEnter 557 // I'm worried that this might confuse Java, so we're going to send a "bogus" dragEnter if necessary (only if the drag succeeded) 558 if (success && sNeedsEnter) { 559 [self postDragEnter]; 560 } 561 562 // DragSourceContextPeer.dragDropFinished() should be called even if there was an error: 563 JNF_MEMBER_CACHE(dragDropFinishedMethod, CDragSourceContextPeerClass, "dragDropFinished", "(ZIII)V"); 564 DLog3(@" -> posting dragDropFinished, point %f, %f", point.x, point.y); 565 JNFCallVoidMethod(env, fDragSourceContextPeer, dragDropFinishedMethod, success, dragOp, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 566 JNF_MEMBER_CACHE(resetHoveringMethod, CDragSourceContextPeerClass, "resetHovering", "()V"); 567 JNFCallVoidMethod(env, fDragSourceContextPeer, resetHoveringMethod); // Hust reset static variable 568 } @finally { 569 // Clear the current DragSource 570 sCurrentDragSource = nil; 571 sNeedsEnter = NO; 572 } 573 574 // We have to do this, otherwise AppKit doesn't know we're finished dragging. Yup, it's that bad. 575 if ([[[NSRunLoop currentRunLoop] currentMode] isEqualTo:NSEventTrackingRunLoopMode]) { 576 [NSApp postEvent:[self nsDragEvent:NO] atStart:YES]; 577 } 578 579 DLog2(@"[CDragSource doDrag] end: %@\n", self); 580 } 581 582 - (void)drag 583 { 584 AWT_ASSERT_NOT_APPKIT_THREAD; 585 586 // Set the drag cursor (or not 3839999) 587 //JNIEnv *env = [ThreadUtilities getJNIEnv]; 588 //jobject gCursor = JNFNewGlobalRef(env, fCursor); 589 //[EventFactory setJavaCursor:gCursor withEnv:env]; 590 591 [self performSelectorOnMainThread:@selector(doDrag) withObject:nil waitUntilDone:YES]; // AWT_THREADING Safe (called from unique asynchronous thread) 592 } 593 594 /******************************** BEGIN NSDraggingSource Interface ********************************/ 595 596 - (void)draggingOperationChanged:(NSDragOperation)dragOp { 597 //DLog2(@"[CDragSource draggingOperationChanged]: %@\n", self); 598 599 JNIEnv* env = [ThreadUtilities getJNIEnv]; 600 601 jint targetActions = fSourceActions; 602 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 603 604 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 605 DLog3(@" -> posting operationChanged, point %f, %f", point.x, point.y); 606 jint modifiedModifiers = fDragKeyModifiers | fDragMouseModifiers | [DnDUtilities javaKeyModifiersForNSDragOperation:dragOp]; 607 608 JNF_MEMBER_CACHE(operationChangedMethod, CDragSourceContextPeerClass, "operationChanged", "(IIII)V"); 609 JNFCallVoidMethod(env, fDragSourceContextPeer, operationChangedMethod, targetActions, modifiedModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 610 } 611 612 - (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)localDrag { 613 //DLog2(@"[CDragSource draggingSourceOperationMaskForLocal]: %@\n", self); 614 return [DnDUtilities mapJavaDragOperationToNS:fSourceActions]; 615 } 616 617 /* 9-16-02 Note: we don't support promises yet. 618 - (NSArray *)namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination { 619 }*/ 620 621 - (void)draggedImage:(NSImage *)image beganAt:(NSPoint)screenPoint { 622 DLog4(@"[CDragSource draggedImage beganAt]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 623 624 // Initialize static variables: 625 sDragOperation = NSDragOperationNone; 626 sDraggingLocation = screenPoint; 627 } 628 629 - (void)draggedImage:(NSImage *)image endedAt:(NSPoint)screenPoint operation:(NSDragOperation)operation { 630 DLog4(@"[CDragSource draggedImage endedAt:]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 631 632 sDraggingLocation = screenPoint; 633 sDragOperation = operation; 634 } 635 636 - (void)draggedImage:(NSImage *)image movedTo:(NSPoint)screenPoint { 637 //DLog4(@"[CDragSource draggedImage moved]: (%d, %d) %@\n", (int) screenPoint.x, (int) screenPoint.y, self); 638 JNIEnv* env = [ThreadUtilities getJNIEnv]; 639 640 JNF_COCOA_ENTER(env); 641 // There are two things we would be interested in: 642 // a) mouse pointer has moved 643 // b) drag actions (key modifiers) have changed 644 645 BOOL notifyJava = FALSE; 646 647 // a) mouse pointer has moved: 648 if (NSEqualPoints(screenPoint, sDraggingLocation) == FALSE) { 649 //DLog2(@"[CDragSource draggedImage:movedTo]: mouse moved, %@\n", self); 650 notifyJava = TRUE; 651 } 652 653 // b) drag actions (key modifiers) have changed: 654 jint modifiers = [DnDUtilities currentJavaExtKeyModifiers]; 655 if (fDragKeyModifiers != modifiers) { 656 NSDragOperation currentOp = [DnDUtilities nsDragOperationForModifiers:[NSEvent modifierFlags]]; 657 NSDragOperation allowedOp = [DnDUtilities mapJavaDragOperationToNS:fSourceActions] & currentOp; 658 659 fDragKeyModifiers = modifiers; 660 661 if (sDragOperation != allowedOp) { 662 sDragOperation = allowedOp; 663 [self draggingOperationChanged:allowedOp]; 664 } 665 } 666 667 // Should we notify Java things have changed? 668 if (notifyJava) { 669 sDraggingLocation = screenPoint; 670 671 NSPoint point = [self mapNSScreenPointToJavaWithOffset:screenPoint]; 672 673 jint targetActions = fSourceActions; 674 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 675 676 // Motion: dragMotion, dragMouseMoved 677 DLog4(@"[CDragSource draggedImage moved]: (%f, %f) %@\n", screenPoint.x, screenPoint.y, self); 678 679 DLog3(@" -> posting dragMotion, point %f, %f", point.x, point.y); 680 JNF_MEMBER_CACHE(dragMotionMethod, CDragSourceContextPeerClass, "dragMotion", "(IIII)V"); 681 JNFCallVoidMethod(env, fDragSourceContextPeer, dragMotionMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 682 683 DLog3(@" -> posting dragMouseMoved, point %f, %f", point.x, point.y); 684 JNF_MEMBER_CACHE(dragMouseMovedMethod, CDragSourceContextPeerClass, "dragMouseMoved", "(IIII)V"); 685 JNFCallVoidMethod(env, fDragSourceContextPeer, dragMouseMovedMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 686 } 687 JNF_COCOA_EXIT(env); 688 } 689 690 - (BOOL)ignoreModifierKeysWhileDragging { 691 //DLog2(@"[CDragSource ignoreModifierKeysWhileDragging]: %@\n", self); 692 return NO; 693 } 694 695 /******************************** END NSDraggingSource Interface ********************************/ 696 697 698 // postDragEnter and postDragExit are called from CDropTarget when possible and appropriate 699 // Currently only possible if source and target are in the same process 700 - (void) postDragEnter { 701 JNIEnv *env = [ThreadUtilities getJNIEnv]; 702 sNeedsEnter = NO; 703 704 jint targetActions = fSourceActions; 705 if ([CDropTarget currentDropTarget]) targetActions = [[CDropTarget currentDropTarget] currentJavaActions]; 706 707 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 708 DLog3(@" -> posting dragEnter, point %f, %f", point.x, point.y); 709 JNF_MEMBER_CACHE(dragEnterMethod, CDragSourceContextPeerClass, "dragEnter", "(IIII)V"); 710 JNFCallVoidMethod(env, fDragSourceContextPeer, dragEnterMethod, targetActions, (jint) fModifiers, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 711 } 712 713 - (void) postDragExit { 714 JNIEnv *env = [ThreadUtilities getJNIEnv]; 715 sNeedsEnter = YES; 716 717 NSPoint point = [self mapNSScreenPointToJavaWithOffset:sDraggingLocation]; 718 DLog3(@" -> posting dragExit, point %f, %f", point.x, point.y); 719 JNF_MEMBER_CACHE(dragExitMethod, CDragSourceContextPeerClass, "dragExit", "(II)V"); 720 JNFCallVoidMethod(env, fDragSourceContextPeer, dragExitMethod, (jint) point.x, (jint) point.y); // AWT_THREADING Safe (event) 721 } 722 723 724 // Java assumes that the origin is the top-left corner of the screen. 725 // Cocoa assumes that the origin is the bottom-left corner of the screen. 726 // Adjust the y coordinate to account for this. 727 // NOTE: Also need to take into account the 0 screen relative screen coords. 728 // This is because all screen coords in Cocoa are relative to the 0 screen. 729 // Also see +[CWindow convertAWTToCocoaScreenRect] 730 // NSScreen-to-JavaScreen mapping: 731 - (NSPoint) mapNSScreenPointToJavaWithOffset:(NSPoint)screenPoint { 732 NSRect mainR = [[[NSScreen screens] objectAtIndex:0] frame]; 733 NSPoint point = NSMakePoint(screenPoint.x, mainR.size.height - (screenPoint.y)); 734 735 // Adjust the point with the drag image offset to get the real mouse hotspot: 736 // The point should remain in screen coordinates (as per DragSourceEvent.getLocation() documentation) 737 point.x -= fDragImageOffset.x; 738 point.y -= ([fDragImage size].height + fDragImageOffset.y); 739 740 return point; 741 } 742 743 @end