1 /* 2 * Copyright (c) 2003, 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 package sun.awt.X11; 27 28 import java.awt.Component; 29 import java.awt.Cursor; 30 import java.awt.Window; 31 32 import java.awt.datatransfer.DataFlavor; 33 import java.awt.datatransfer.Transferable; 34 35 import java.awt.dnd.DnDConstants; 36 import java.awt.dnd.DragGestureEvent; 37 import java.awt.dnd.InvalidDnDOperationException; 38 39 import java.util.*; 40 41 import sun.util.logging.PlatformLogger; 42 43 import sun.awt.dnd.SunDragSourceContextPeer; 44 import sun.awt.dnd.SunDropTargetContextPeer; 45 import sun.awt.SunToolkit; 46 import sun.awt.AWTAccessor; 47 48 /** 49 * The XDragSourceContextPeer class is the class responsible for handling 50 * the interaction between the XDnD/Motif DnD subsystem and Java drag sources. 51 * 52 * @since 1.5 53 */ 54 public final class XDragSourceContextPeer 55 extends SunDragSourceContextPeer implements XDragSourceProtocolListener { 56 private static final PlatformLogger logger = 57 PlatformLogger.getLogger("sun.awt.X11.xembed.xdnd.XDragSourceContextPeer"); 58 59 /* The events selected on the root window when the drag begins. */ 60 private static final int ROOT_EVENT_MASK = (int)XConstants.ButtonMotionMask | 61 (int)XConstants.KeyPressMask | (int)XConstants.KeyReleaseMask; 62 /* The events to be delivered during grab. */ 63 private static final int GRAB_EVENT_MASK = (int)XConstants.ButtonPressMask | 64 (int)XConstants.ButtonMotionMask | (int)XConstants.ButtonReleaseMask; 65 66 /* The event mask of the root window before the drag operation starts. */ 67 private long rootEventMask = 0; 68 private boolean dndInProgress = false; 69 private boolean dragInProgress = false; 70 private long dragRootWindow = 0; 71 72 /* The protocol chosen for the communication with the current drop target. */ 73 private XDragSourceProtocol dragProtocol = null; 74 /* The drop action chosen by the current drop target. */ 75 private int targetAction = DnDConstants.ACTION_NONE; 76 /* The set of drop actions supported by the drag source. */ 77 private int sourceActions = DnDConstants.ACTION_NONE; 78 /* The drop action selected by the drag source based on the modifiers state 79 and the action selected by the current drop target. */ 80 private int sourceAction = DnDConstants.ACTION_NONE; 81 /* The data formats supported by the drag source for the current drag 82 operation. */ 83 private long[] sourceFormats = null; 84 /* The XID of the root subwindow that contains the current target. */ 85 private long targetRootSubwindow = 0; 86 /* The pointer location. */ 87 private int xRoot = 0; 88 private int yRoot = 0; 89 /* Keyboard modifiers state. */ 90 private int eventState = 0; 91 92 /* XEmbed DnD support. We act as a proxy between source and target. */ 93 private long proxyModeSourceWindow = 0; 94 95 /* The singleton instance. */ 96 private static final XDragSourceContextPeer theInstance = 97 new XDragSourceContextPeer(null); 98 99 private XDragSourceContextPeer(DragGestureEvent dge) { 100 super(dge); 101 } 102 103 static XDragSourceProtocolListener getXDragSourceProtocolListener() { 104 return theInstance; 105 } 106 107 static XDragSourceContextPeer createDragSourceContextPeer(DragGestureEvent dge) 108 throws InvalidDnDOperationException { 109 theInstance.setTrigger(dge); 110 return theInstance; 111 } 112 113 @SuppressWarnings("deprecation") 114 protected void startDrag(Transferable transferable, 115 long[] formats, Map<Long, DataFlavor> formatMap) { 116 Component component = getTrigger().getComponent(); 117 Component c = null; 118 XWindowPeer wpeer = null; 119 120 for (c = component; c != null && !(c instanceof Window); 121 c = AWTAccessor.getComponentAccessor().getParent(c)); 122 123 if (c instanceof Window) { 124 wpeer = (XWindowPeer)c.getPeer(); 125 } 126 127 if (wpeer == null) { 128 throw new InvalidDnDOperationException( 129 "Cannot find top-level for the drag source component"); 130 } 131 132 long xcursor = 0; 133 long rootWindow = 0; 134 long dragWindow = 0; 135 long timeStamp = 0; 136 137 /* Retrieve the X cursor for the drag operation. */ 138 { 139 Cursor cursor = getCursor(); 140 if (cursor != null) { 141 xcursor = XGlobalCursorManager.getCursor(cursor); 142 } 143 } 144 145 XToolkit.awtLock(); 146 try { 147 if (proxyModeSourceWindow != 0) { 148 throw new InvalidDnDOperationException("Proxy drag in progress"); 149 } 150 if (dndInProgress) { 151 throw new InvalidDnDOperationException("Drag in progress"); 152 } 153 154 /* Determine the root window for the drag operation. */ 155 { 156 long screen = XlibWrapper.XScreenNumberOfScreen(wpeer.getScreen()); 157 rootWindow = XlibWrapper.RootWindow(XToolkit.getDisplay(), screen); 158 } 159 160 dragWindow = XWindow.getXAWTRootWindow().getWindow(); 161 162 timeStamp = XToolkit.getCurrentServerTime(); 163 164 int dropActions = getDragSourceContext().getSourceActions(); 165 166 Iterator<XDragSourceProtocol> dragProtocols = 167 XDragAndDropProtocols.getDragSourceProtocols(); 168 while (dragProtocols.hasNext()) { 169 XDragSourceProtocol dragProtocol = dragProtocols.next(); 170 try { 171 dragProtocol.initializeDrag(dropActions, transferable, 172 formatMap, formats); 173 } catch (XException xe) { 174 throw (InvalidDnDOperationException) 175 new InvalidDnDOperationException().initCause(xe); 176 } 177 } 178 179 /* Install X grabs. */ 180 { 181 int status; 182 XWindowAttributes wattr = new XWindowAttributes(); 183 try { 184 status = XlibWrapper.XGetWindowAttributes(XToolkit.getDisplay(), 185 rootWindow, wattr.pData); 186 187 if (status == 0) { 188 throw new InvalidDnDOperationException("XGetWindowAttributes failed"); 189 } 190 191 rootEventMask = wattr.get_your_event_mask(); 192 193 XlibWrapper.XSelectInput(XToolkit.getDisplay(), rootWindow, 194 rootEventMask | ROOT_EVENT_MASK); 195 } finally { 196 wattr.dispose(); 197 } 198 199 XBaseWindow.ungrabInput(); 200 201 status = XlibWrapper.XGrabPointer(XToolkit.getDisplay(), rootWindow, 202 0, GRAB_EVENT_MASK, 203 XConstants.GrabModeAsync, 204 XConstants.GrabModeAsync, 205 XConstants.None, xcursor, timeStamp); 206 207 if (status != XConstants.GrabSuccess) { 208 cleanup(timeStamp); 209 throwGrabFailureException("Cannot grab pointer", status); 210 return; 211 } 212 213 status = XlibWrapper.XGrabKeyboard(XToolkit.getDisplay(), rootWindow, 214 0, 215 XConstants.GrabModeAsync, 216 XConstants.GrabModeAsync, 217 timeStamp); 218 219 if (status != XConstants.GrabSuccess) { 220 cleanup(timeStamp); 221 throwGrabFailureException("Cannot grab keyboard", status); 222 return; 223 } 224 } 225 226 /* Update the global state. */ 227 dndInProgress = true; 228 dragInProgress = true; 229 dragRootWindow = rootWindow; 230 sourceActions = dropActions; 231 sourceFormats = formats; 232 } finally { 233 XToolkit.awtUnlock(); 234 } 235 236 /* This implementation doesn't use native context */ 237 setNativeContext(0); 238 239 SunDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(transferable); 240 } 241 242 public long getProxyModeSourceWindow() { 243 return proxyModeSourceWindow; 244 } 245 246 private void setProxyModeSourceWindowImpl(long window) { 247 proxyModeSourceWindow = window; 248 } 249 250 public static void setProxyModeSourceWindow(long window) { 251 theInstance.setProxyModeSourceWindowImpl(window); 252 } 253 254 /** 255 * set cursor 256 */ 257 258 public void setCursor(Cursor c) throws InvalidDnDOperationException { 259 XToolkit.awtLock(); 260 try { 261 super.setCursor(c); 262 } finally { 263 XToolkit.awtUnlock(); 264 } 265 } 266 267 protected void setNativeCursor(long nativeCtxt, Cursor c, int cType) { 268 assert XToolkit.isAWTLockHeldByCurrentThread(); 269 270 if (c == null) { 271 return; 272 } 273 274 long xcursor = XGlobalCursorManager.getCursor(c); 275 276 if (xcursor == 0) { 277 return; 278 } 279 280 XlibWrapper.XChangeActivePointerGrab(XToolkit.getDisplay(), 281 GRAB_EVENT_MASK, 282 xcursor, 283 XConstants.CurrentTime); 284 } 285 286 protected boolean needsBogusExitBeforeDrop() { 287 return false; 288 } 289 290 private void throwGrabFailureException(String msg, int grabStatus) 291 throws InvalidDnDOperationException { 292 String msgCause = ""; 293 switch (grabStatus) { 294 case XConstants.GrabNotViewable: msgCause = "not viewable"; break; 295 case XConstants.AlreadyGrabbed: msgCause = "already grabbed"; break; 296 case XConstants.GrabInvalidTime: msgCause = "invalid time"; break; 297 case XConstants.GrabFrozen: msgCause = "grab frozen"; break; 298 default: msgCause = "unknown failure"; break; 299 } 300 throw new InvalidDnDOperationException(msg + ": " + msgCause); 301 } 302 303 /** 304 * The caller must own awtLock. 305 */ 306 public void cleanup(long time) { 307 if (dndInProgress) { 308 if (dragProtocol != null) { 309 dragProtocol.sendLeaveMessage(time); 310 } 311 312 if (targetAction != DnDConstants.ACTION_NONE) { 313 dragExit(xRoot, yRoot); 314 } 315 316 dragDropFinished(false, DnDConstants.ACTION_NONE, xRoot, yRoot); 317 } 318 319 Iterator<XDragSourceProtocol> dragProtocols = 320 XDragAndDropProtocols.getDragSourceProtocols(); 321 while (dragProtocols.hasNext()) { 322 XDragSourceProtocol dragProtocol = dragProtocols.next(); 323 try { 324 dragProtocol.cleanup(); 325 } catch (XException xe) { 326 // Ignore the exception. 327 } 328 } 329 330 dndInProgress = false; 331 dragInProgress = false; 332 dragRootWindow = 0; 333 sourceFormats = null; 334 sourceActions = DnDConstants.ACTION_NONE; 335 sourceAction = DnDConstants.ACTION_NONE; 336 eventState = 0; 337 xRoot = 0; 338 yRoot = 0; 339 340 cleanupTargetInfo(); 341 342 removeDnDGrab(time); 343 } 344 345 /** 346 * The caller must own awtLock. 347 */ 348 private void cleanupTargetInfo() { 349 targetAction = DnDConstants.ACTION_NONE; 350 dragProtocol = null; 351 targetRootSubwindow = 0; 352 } 353 354 private void removeDnDGrab(long time) { 355 assert XToolkit.isAWTLockHeldByCurrentThread(); 356 357 XlibWrapper.XUngrabPointer(XToolkit.getDisplay(), time); 358 XlibWrapper.XUngrabKeyboard(XToolkit.getDisplay(), time); 359 360 /* Restore the root event mask if it was changed. */ 361 if ((rootEventMask | ROOT_EVENT_MASK) != rootEventMask && 362 dragRootWindow != 0) { 363 364 XlibWrapper.XSelectInput(XToolkit.getDisplay(), 365 dragRootWindow, 366 rootEventMask); 367 } 368 369 rootEventMask = 0; 370 dragRootWindow = 0; 371 } 372 373 private boolean processClientMessage(XClientMessageEvent xclient) { 374 if (dragProtocol != null) { 375 return dragProtocol.processClientMessage(xclient); 376 } 377 return false; 378 } 379 380 /** 381 * Updates the source action according to the specified state. 382 * 383 * @returns true if the source 384 */ 385 private boolean updateSourceAction(int state) { 386 int action = SunDragSourceContextPeer.convertModifiersToDropAction(XWindow.getModifiers(state, 0, 0), 387 sourceActions); 388 if (sourceAction == action) { 389 return false; 390 } 391 sourceAction = action; 392 return true; 393 } 394 395 /** 396 * Returns the client window under the specified root subwindow. 397 */ 398 private static long findClientWindow(long window) { 399 if (XlibUtil.isTrueToplevelWindow(window)) { 400 return window; 401 } 402 403 Set<Long> children = XlibUtil.getChildWindows(window); 404 for (Long child : children) { 405 long win = findClientWindow(child); 406 if (win != 0) { 407 return win; 408 } 409 } 410 411 return 0; 412 } 413 414 private void doUpdateTargetWindow(long subwindow, long time) { 415 long clientWindow = 0; 416 long proxyWindow = 0; 417 XDragSourceProtocol protocol = null; 418 boolean isReceiver = false; 419 420 if (subwindow != 0) { 421 clientWindow = findClientWindow(subwindow); 422 } 423 424 if (clientWindow != 0) { 425 Iterator<XDragSourceProtocol> dragProtocols = 426 XDragAndDropProtocols.getDragSourceProtocols(); 427 while (dragProtocols.hasNext()) { 428 XDragSourceProtocol dragProtocol = dragProtocols.next(); 429 if (dragProtocol.attachTargetWindow(clientWindow, time)) { 430 protocol = dragProtocol; 431 break; 432 } 433 } 434 } 435 436 /* Update the global state. */ 437 dragProtocol = protocol; 438 targetAction = DnDConstants.ACTION_NONE; 439 targetRootSubwindow = subwindow; 440 } 441 442 private void updateTargetWindow(XMotionEvent xmotion) { 443 assert XToolkit.isAWTLockHeldByCurrentThread(); 444 445 int x = xmotion.get_x_root(); 446 int y = xmotion.get_y_root(); 447 long time = xmotion.get_time(); 448 long subwindow = xmotion.get_subwindow(); 449 450 /* 451 * If this event had occurred before the pointer was grabbed, 452 * query the server for the current root subwindow. 453 */ 454 if (xmotion.get_window() != xmotion.get_root()) { 455 XlibWrapper.XQueryPointer(XToolkit.getDisplay(), 456 xmotion.get_root(), 457 XlibWrapper.larg1, // root 458 XlibWrapper.larg2, // subwindow 459 XlibWrapper.larg3, // x_root 460 XlibWrapper.larg4, // y_root 461 XlibWrapper.larg5, // x 462 XlibWrapper.larg6, // y 463 XlibWrapper.larg7); // modifiers 464 subwindow = Native.getLong(XlibWrapper.larg2); 465 } 466 467 if (targetRootSubwindow != subwindow) { 468 if (dragProtocol != null) { 469 dragProtocol.sendLeaveMessage(time); 470 471 /* 472 * Neither Motif DnD nor XDnD provide a mean for the target 473 * to notify the source that the pointer exits the drop site 474 * that occupies the whole top level. 475 * We detect this situation and post dragExit. 476 */ 477 if (targetAction != DnDConstants.ACTION_NONE) { 478 dragExit(x, y); 479 } 480 } 481 482 /* Update the global state. */ 483 doUpdateTargetWindow(subwindow, time); 484 485 if (dragProtocol != null) { 486 dragProtocol.sendEnterMessage(sourceFormats, 487 sourceAction, 488 sourceActions, 489 time); 490 } 491 } 492 } 493 494 /* 495 * DO NOT USE is_hint field of xmotion since it could not be set when we 496 * convert XKeyEvent or XButtonRelease to XMotionEvent. 497 */ 498 private void processMouseMove(XMotionEvent xmotion) { 499 if (!dragInProgress) { 500 return; 501 } 502 if (xRoot != xmotion.get_x_root() || yRoot != xmotion.get_y_root()) { 503 xRoot = xmotion.get_x_root(); 504 yRoot = xmotion.get_y_root(); 505 506 postDragSourceDragEvent(targetAction, 507 XWindow.getModifiers(xmotion.get_state(),0,0), 508 xRoot, yRoot, DISPATCH_MOUSE_MOVED); 509 } 510 511 if (eventState != xmotion.get_state()) { 512 if (updateSourceAction(xmotion.get_state()) && dragProtocol != null) { 513 postDragSourceDragEvent(targetAction, 514 XWindow.getModifiers(xmotion.get_state(),0,0), 515 xRoot, yRoot, DISPATCH_CHANGED); 516 } 517 eventState = xmotion.get_state(); 518 } 519 520 updateTargetWindow(xmotion); 521 522 if (dragProtocol != null) { 523 dragProtocol.sendMoveMessage(xmotion.get_x_root(), 524 xmotion.get_y_root(), 525 sourceAction, sourceActions, 526 xmotion.get_time()); 527 } 528 } 529 530 private void processDrop(XButtonEvent xbutton) { 531 try { 532 dragProtocol.initiateDrop(xbutton.get_x_root(), 533 xbutton.get_y_root(), 534 sourceAction, sourceActions, 535 xbutton.get_time()); 536 } catch (XException e) { 537 cleanup(xbutton.get_time()); 538 } 539 } 540 541 private boolean processProxyModeEvent(XEvent ev) { 542 if (getProxyModeSourceWindow() == 0) { 543 return false; 544 } 545 546 if (ev.get_type() != XConstants.ClientMessage) { 547 return false; 548 } 549 550 if (logger.isLoggable(PlatformLogger.Level.FINEST)) { 551 logger.finest(" proxyModeSourceWindow=" + 552 getProxyModeSourceWindow() + 553 " ev=" + ev); 554 } 555 556 XClientMessageEvent xclient = ev.get_xclient(); 557 558 Iterator<XDragSourceProtocol> dragProtocols = 559 XDragAndDropProtocols.getDragSourceProtocols(); 560 while (dragProtocols.hasNext()) { 561 XDragSourceProtocol dragProtocol = dragProtocols.next(); 562 if (dragProtocol.processProxyModeEvent(xclient, 563 getProxyModeSourceWindow())) { 564 return true; 565 } 566 } 567 568 return false; 569 } 570 571 /** 572 * The caller must own awtLock. 573 * 574 * @returns true if the even was processed and shouldn't be passed along. 575 */ 576 private boolean doProcessEvent(XEvent ev) { 577 assert XToolkit.isAWTLockHeldByCurrentThread(); 578 579 if (processProxyModeEvent(ev)) { 580 return true; 581 } 582 583 if (!dndInProgress) { 584 return false; 585 } 586 587 switch (ev.get_type()) { 588 case XConstants.ClientMessage: { 589 XClientMessageEvent xclient = ev.get_xclient(); 590 return processClientMessage(xclient); 591 } 592 case XConstants.DestroyNotify: { 593 XDestroyWindowEvent xde = ev.get_xdestroywindow(); 594 595 /* Target crashed during drop processing - cleanup. */ 596 if (!dragInProgress && 597 dragProtocol != null && 598 xde.get_window() == dragProtocol.getTargetWindow()) { 599 cleanup(XConstants.CurrentTime); 600 return true; 601 } 602 /* Pass along */ 603 return false; 604 } 605 } 606 607 if (!dragInProgress) { 608 return false; 609 } 610 611 /* Process drag-only messages. */ 612 switch (ev.get_type()) { 613 case XConstants.KeyRelease: 614 case XConstants.KeyPress: { 615 XKeyEvent xkey = ev.get_xkey(); 616 long keysym = XlibWrapper.XKeycodeToKeysym(XToolkit.getDisplay(), 617 xkey.get_keycode(), 0); 618 switch ((int)keysym) { 619 case (int)XKeySymConstants.XK_Escape: { 620 if (ev.get_type() == XConstants.KeyRelease) { 621 cleanup(xkey.get_time()); 622 } 623 break; 624 } 625 case (int)XKeySymConstants.XK_Control_R: 626 case (int)XKeySymConstants.XK_Control_L: 627 case (int)XKeySymConstants.XK_Shift_R: 628 case (int)XKeySymConstants.XK_Shift_L: { 629 XlibWrapper.XQueryPointer(XToolkit.getDisplay(), 630 xkey.get_root(), 631 XlibWrapper.larg1, // root 632 XlibWrapper.larg2, // subwindow 633 XlibWrapper.larg3, // x_root 634 XlibWrapper.larg4, // y_root 635 XlibWrapper.larg5, // x 636 XlibWrapper.larg6, // y 637 XlibWrapper.larg7); // modifiers 638 XMotionEvent xmotion = new XMotionEvent(); 639 try { 640 xmotion.set_type(XConstants.MotionNotify); 641 xmotion.set_serial(xkey.get_serial()); 642 xmotion.set_send_event(xkey.get_send_event()); 643 xmotion.set_display(xkey.get_display()); 644 xmotion.set_window(xkey.get_window()); 645 xmotion.set_root(xkey.get_root()); 646 xmotion.set_subwindow(xkey.get_subwindow()); 647 xmotion.set_time(xkey.get_time()); 648 xmotion.set_x(xkey.get_x()); 649 xmotion.set_y(xkey.get_y()); 650 xmotion.set_x_root(xkey.get_x_root()); 651 xmotion.set_y_root(xkey.get_y_root()); 652 xmotion.set_state((int)Native.getLong(XlibWrapper.larg7)); 653 // we do not use this field, so it's unset for now 654 // xmotion.set_is_hint(???); 655 xmotion.set_same_screen(xkey.get_same_screen()); 656 657 //It's safe to use key event as motion event since we use only their common fields. 658 processMouseMove(xmotion); 659 } finally { 660 xmotion.dispose(); 661 } 662 break; 663 } 664 } 665 return true; 666 } 667 case XConstants.ButtonPress: 668 return true; 669 case XConstants.MotionNotify: 670 processMouseMove(ev.get_xmotion()); 671 return true; 672 case XConstants.ButtonRelease: { 673 XButtonEvent xbutton = ev.get_xbutton(); 674 /* 675 * Ignore the buttons above 20 due to the bit limit for 676 * InputEvent.BUTTON_DOWN_MASK. 677 * One more bit is reserved for FIRST_HIGH_BIT. 678 */ 679 if (xbutton.get_button() > SunToolkit.MAX_BUTTONS_SUPPORTED) { 680 return true; 681 } 682 683 /* 684 * On some X servers it could happen that ButtonRelease coordinates 685 * differ from the latest MotionNotify coordinates, so we need to 686 * process it as a mouse motion. 687 */ 688 XMotionEvent xmotion = new XMotionEvent(); 689 try { 690 xmotion.set_type(XConstants.MotionNotify); 691 xmotion.set_serial(xbutton.get_serial()); 692 xmotion.set_send_event(xbutton.get_send_event()); 693 xmotion.set_display(xbutton.get_display()); 694 xmotion.set_window(xbutton.get_window()); 695 xmotion.set_root(xbutton.get_root()); 696 xmotion.set_subwindow(xbutton.get_subwindow()); 697 xmotion.set_time(xbutton.get_time()); 698 xmotion.set_x(xbutton.get_x()); 699 xmotion.set_y(xbutton.get_y()); 700 xmotion.set_x_root(xbutton.get_x_root()); 701 xmotion.set_y_root(xbutton.get_y_root()); 702 xmotion.set_state(xbutton.get_state()); 703 // we do not use this field, so it's unset for now 704 // xmotion.set_is_hint(???); 705 xmotion.set_same_screen(xbutton.get_same_screen()); 706 707 //It's safe to use key event as motion event since we use only their common fields. 708 processMouseMove(xmotion); 709 } finally { 710 xmotion.dispose(); 711 } 712 if (xbutton.get_button() == XConstants.buttons[0] 713 || xbutton.get_button() == XConstants.buttons[1]) { 714 // drag is initiated with Button1 or Button2 pressed and 715 // ended on release of either of these buttons (as the same 716 // behavior was with our old Motif DnD-based implementation) 717 removeDnDGrab(xbutton.get_time()); 718 dragInProgress = false; 719 if (dragProtocol != null && targetAction != DnDConstants.ACTION_NONE) { 720 /* 721 * ACTION_NONE indicates that either the drop target rejects the 722 * drop or it haven't responded yet. The latter could happen in 723 * case of fast drag, slow target-server connection or slow 724 * drag notifications processing on the target side. 725 */ 726 processDrop(xbutton); 727 } else { 728 cleanup(xbutton.get_time()); 729 } 730 } 731 return true; 732 } 733 } 734 735 return false; 736 } 737 738 static boolean processEvent(XEvent ev) { 739 XToolkit.awtLock(); 740 try { 741 try { 742 return theInstance.doProcessEvent(ev); 743 } catch (XException e) { 744 e.printStackTrace(); 745 return false; 746 } 747 } finally { 748 XToolkit.awtUnlock(); 749 } 750 } 751 752 /* XDragSourceProtocolListener implementation */ 753 754 public void handleDragReply(int action) { 755 // NOTE: we have to use the current pointer location, since 756 // the target didn't specify the coordinates for the reply. 757 handleDragReply(action, xRoot, yRoot); 758 } 759 760 public void handleDragReply(int action, int x, int y) { 761 // NOTE: we have to use the current modifiers state, since 762 // the target didn't specify the modifiers state for the reply. 763 handleDragReply(action, xRoot, yRoot, XWindow.getModifiers(eventState,0,0)); 764 } 765 766 public void handleDragReply(int action, int x, int y, int modifiers) { 767 if (action == DnDConstants.ACTION_NONE && 768 targetAction != DnDConstants.ACTION_NONE) { 769 dragExit(x, y); 770 } else if (action != DnDConstants.ACTION_NONE) { 771 int type = 0; 772 773 if (targetAction == DnDConstants.ACTION_NONE) { 774 type = SunDragSourceContextPeer.DISPATCH_ENTER; 775 } else { 776 type = SunDragSourceContextPeer.DISPATCH_MOTION; 777 } 778 779 // Note that we use the modifiers state a 780 postDragSourceDragEvent(action, modifiers, x, y, type); 781 } 782 783 targetAction = action; 784 } 785 786 public void handleDragFinished() { 787 /* Assume that the drop was successful. */ 788 handleDragFinished(true); 789 } 790 791 public void handleDragFinished(boolean success) { 792 /* Assume that the performed drop action is the latest drop action 793 accepted by the drop target. */ 794 handleDragFinished(true, targetAction); 795 } 796 797 public void handleDragFinished(boolean success, int action) { 798 // NOTE: we have to use the current pointer location, since 799 // the target didn't specify the coordinates for the reply. 800 handleDragFinished(success, action, xRoot, yRoot); 801 } 802 803 public void handleDragFinished(boolean success, int action, int x, int y) { 804 dragDropFinished(success, action, x, y); 805 806 dndInProgress = false; 807 cleanup(XConstants.CurrentTime); 808 } 809 }