1 /* 2 * Copyright (c) 2003, 2015, 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 protected void startDrag(Transferable transferable, 114 long[] formats, Map<Long, DataFlavor> formatMap) { 115 Component component = getTrigger().getComponent(); 116 Component c = null; 117 XWindowPeer wpeer = null; 118 119 for (c = component; c != null && !(c instanceof Window); 120 c = AWTAccessor.getComponentAccessor().getParent(c)); 121 122 if (c instanceof Window) { 123 wpeer = AWTAccessor.getComponentAccessor().getPeer(c); 124 } 125 126 if (wpeer == null) { 127 throw new InvalidDnDOperationException( 128 "Cannot find top-level for the drag source component"); 129 } 130 131 long xcursor = 0; 132 long rootWindow = 0; 133 long dragWindow = 0; 134 long timeStamp = 0; 135 136 /* Retrieve the X cursor for the drag operation. */ 137 { 138 Cursor cursor = getCursor(); 139 if (cursor != null) { 140 xcursor = XGlobalCursorManager.getCursor(cursor); 141 } 142 } 143 144 XToolkit.awtLock(); 145 try { 146 if (proxyModeSourceWindow != 0) { 147 throw new InvalidDnDOperationException("Proxy drag in progress"); 148 } 149 if (dndInProgress) { 150 throw new InvalidDnDOperationException("Drag in progress"); 151 } 152 153 /* Determine the root window for the drag operation. */ 154 { 155 long screen = XlibWrapper.XScreenNumberOfScreen(wpeer.getScreen()); 156 rootWindow = XlibWrapper.RootWindow(XToolkit.getDisplay(), screen); 157 } 158 159 dragWindow = XWindow.getXAWTRootWindow().getWindow(); 160 161 timeStamp = XToolkit.getCurrentServerTime(); 162 163 int dropActions = getDragSourceContext().getSourceActions(); 164 165 Iterator<XDragSourceProtocol> dragProtocols = 166 XDragAndDropProtocols.getDragSourceProtocols(); 167 while (dragProtocols.hasNext()) { 168 XDragSourceProtocol dragProtocol = dragProtocols.next(); 169 try { 170 dragProtocol.initializeDrag(dropActions, transferable, 171 formatMap, formats); 172 } catch (XException xe) { 173 throw (InvalidDnDOperationException) 174 new InvalidDnDOperationException().initCause(xe); 175 } 176 } 177 178 /* Install X grabs. */ 179 { 180 int status; 181 XWindowAttributes wattr = new XWindowAttributes(); 182 try { 183 status = XlibWrapper.XGetWindowAttributes(XToolkit.getDisplay(), 184 rootWindow, wattr.pData); 185 186 if (status == 0) { 187 throw new InvalidDnDOperationException("XGetWindowAttributes failed"); 188 } 189 190 rootEventMask = wattr.get_your_event_mask(); 191 192 XlibWrapper.XSelectInput(XToolkit.getDisplay(), rootWindow, 193 rootEventMask | ROOT_EVENT_MASK); 194 } finally { 195 wattr.dispose(); 196 } 197 198 XBaseWindow.ungrabInput(); 199 200 status = XlibWrapper.XGrabPointer(XToolkit.getDisplay(), rootWindow, 201 0, GRAB_EVENT_MASK, 202 XConstants.GrabModeAsync, 203 XConstants.GrabModeAsync, 204 XConstants.None, xcursor, timeStamp); 205 206 if (status != XConstants.GrabSuccess) { 207 cleanup(timeStamp); 208 throwGrabFailureException("Cannot grab pointer", status); 209 return; 210 } 211 212 status = XlibWrapper.XGrabKeyboard(XToolkit.getDisplay(), rootWindow, 213 0, 214 XConstants.GrabModeAsync, 215 XConstants.GrabModeAsync, 216 timeStamp); 217 218 if (status != XConstants.GrabSuccess) { 219 cleanup(timeStamp); 220 throwGrabFailureException("Cannot grab keyboard", status); 221 return; 222 } 223 } 224 225 /* Update the global state. */ 226 dndInProgress = true; 227 dragInProgress = true; 228 dragRootWindow = rootWindow; 229 sourceActions = dropActions; 230 sourceFormats = formats; 231 } finally { 232 XToolkit.awtUnlock(); 233 } 234 235 /* This implementation doesn't use native context */ 236 setNativeContext(0); 237 238 SunDropTargetContextPeer.setCurrentJVMLocalSourceTransferable(transferable); 239 } 240 241 public long getProxyModeSourceWindow() { 242 return proxyModeSourceWindow; 243 } 244 245 private void setProxyModeSourceWindowImpl(long window) { 246 proxyModeSourceWindow = window; 247 } 248 249 public static void setProxyModeSourceWindow(long window) { 250 theInstance.setProxyModeSourceWindowImpl(window); 251 } 252 253 /** 254 * set cursor 255 */ 256 257 public void setCursor(Cursor c) throws InvalidDnDOperationException { 258 XToolkit.awtLock(); 259 try { 260 super.setCursor(c); 261 } finally { 262 XToolkit.awtUnlock(); 263 } 264 } 265 266 protected void setNativeCursor(long nativeCtxt, Cursor c, int cType) { 267 assert XToolkit.isAWTLockHeldByCurrentThread(); 268 269 if (c == null) { 270 return; 271 } 272 273 long xcursor = XGlobalCursorManager.getCursor(c); 274 275 if (xcursor == 0) { 276 return; 277 } 278 279 XlibWrapper.XChangeActivePointerGrab(XToolkit.getDisplay(), 280 GRAB_EVENT_MASK, 281 xcursor, 282 XConstants.CurrentTime); 283 } 284 285 protected boolean needsBogusExitBeforeDrop() { 286 return false; 287 } 288 289 private void throwGrabFailureException(String msg, int grabStatus) 290 throws InvalidDnDOperationException { 291 String msgCause = ""; 292 switch (grabStatus) { 293 case XConstants.GrabNotViewable: msgCause = "not viewable"; break; 294 case XConstants.AlreadyGrabbed: msgCause = "already grabbed"; break; 295 case XConstants.GrabInvalidTime: msgCause = "invalid time"; break; 296 case XConstants.GrabFrozen: msgCause = "grab frozen"; break; 297 default: msgCause = "unknown failure"; break; 298 } 299 throw new InvalidDnDOperationException(msg + ": " + msgCause); 300 } 301 302 /** 303 * The caller must own awtLock. 304 */ 305 public void cleanup(long time) { 306 if (dndInProgress) { 307 if (dragProtocol != null) { 308 dragProtocol.sendLeaveMessage(time); 309 } 310 311 if (targetAction != DnDConstants.ACTION_NONE) { 312 dragExit(xRoot, yRoot); 313 } 314 315 dragDropFinished(false, DnDConstants.ACTION_NONE, xRoot, yRoot); 316 } 317 318 Iterator<XDragSourceProtocol> dragProtocols = 319 XDragAndDropProtocols.getDragSourceProtocols(); 320 while (dragProtocols.hasNext()) { 321 XDragSourceProtocol dragProtocol = dragProtocols.next(); 322 try { 323 dragProtocol.cleanup(); 324 } catch (XException xe) { 325 // Ignore the exception. 326 } 327 } 328 329 dndInProgress = false; 330 dragInProgress = false; 331 dragRootWindow = 0; 332 sourceFormats = null; 333 sourceActions = DnDConstants.ACTION_NONE; 334 sourceAction = DnDConstants.ACTION_NONE; 335 eventState = 0; 336 xRoot = 0; 337 yRoot = 0; 338 339 cleanupTargetInfo(); 340 341 removeDnDGrab(time); 342 } 343 344 /** 345 * The caller must own awtLock. 346 */ 347 private void cleanupTargetInfo() { 348 targetAction = DnDConstants.ACTION_NONE; 349 dragProtocol = null; 350 targetRootSubwindow = 0; 351 } 352 353 private void removeDnDGrab(long time) { 354 assert XToolkit.isAWTLockHeldByCurrentThread(); 355 356 XlibWrapper.XUngrabPointer(XToolkit.getDisplay(), time); 357 XlibWrapper.XUngrabKeyboard(XToolkit.getDisplay(), time); 358 359 /* Restore the root event mask if it was changed. */ 360 if ((rootEventMask | ROOT_EVENT_MASK) != rootEventMask && 361 dragRootWindow != 0) { 362 363 XlibWrapper.XSelectInput(XToolkit.getDisplay(), 364 dragRootWindow, 365 rootEventMask); 366 } 367 368 rootEventMask = 0; 369 dragRootWindow = 0; 370 } 371 372 private boolean processClientMessage(XClientMessageEvent xclient) { 373 if (dragProtocol != null) { 374 return dragProtocol.processClientMessage(xclient); 375 } 376 return false; 377 } 378 379 /** 380 * Updates the source action according to the specified state. 381 * 382 * @return true if the source 383 */ 384 private boolean updateSourceAction(int state) { 385 int action = SunDragSourceContextPeer.convertModifiersToDropAction(XWindow.getModifiers(state, 0, 0), 386 sourceActions); 387 if (sourceAction == action) { 388 return false; 389 } 390 sourceAction = action; 391 return true; 392 } 393 394 /** 395 * Returns the client window under the specified root subwindow. 396 */ 397 private static long findClientWindow(long window) { 398 if (XlibUtil.isTrueToplevelWindow(window)) { 399 return window; 400 } 401 402 Set<Long> children = XlibUtil.getChildWindows(window); 403 for (Long child : children) { 404 long win = findClientWindow(child); 405 if (win != 0) { 406 return win; 407 } 408 } 409 410 return 0; 411 } 412 413 private void doUpdateTargetWindow(long subwindow, long time) { 414 long clientWindow = 0; 415 long proxyWindow = 0; 416 XDragSourceProtocol protocol = null; 417 boolean isReceiver = false; 418 419 if (subwindow != 0) { 420 clientWindow = findClientWindow(subwindow); 421 } 422 423 if (clientWindow != 0) { 424 Iterator<XDragSourceProtocol> dragProtocols = 425 XDragAndDropProtocols.getDragSourceProtocols(); 426 while (dragProtocols.hasNext()) { 427 XDragSourceProtocol dragProtocol = dragProtocols.next(); 428 if (dragProtocol.attachTargetWindow(clientWindow, time)) { 429 protocol = dragProtocol; 430 break; 431 } 432 } 433 } 434 435 /* Update the global state. */ 436 dragProtocol = protocol; 437 targetAction = DnDConstants.ACTION_NONE; 438 targetRootSubwindow = subwindow; 439 } 440 441 private void updateTargetWindow(XMotionEvent xmotion) { 442 assert XToolkit.isAWTLockHeldByCurrentThread(); 443 444 int x = xmotion.get_x_root(); 445 int y = xmotion.get_y_root(); 446 long time = xmotion.get_time(); 447 long subwindow = xmotion.get_subwindow(); 448 449 /* 450 * If this event had occurred before the pointer was grabbed, 451 * query the server for the current root subwindow. 452 */ 453 if (xmotion.get_window() != xmotion.get_root()) { 454 XlibWrapper.XQueryPointer(XToolkit.getDisplay(), 455 xmotion.get_root(), 456 XlibWrapper.larg1, // root 457 XlibWrapper.larg2, // subwindow 458 XlibWrapper.larg3, // x_root 459 XlibWrapper.larg4, // y_root 460 XlibWrapper.larg5, // x 461 XlibWrapper.larg6, // y 462 XlibWrapper.larg7); // modifiers 463 subwindow = Native.getLong(XlibWrapper.larg2); 464 } 465 466 if (targetRootSubwindow != subwindow) { 467 if (dragProtocol != null) { 468 dragProtocol.sendLeaveMessage(time); 469 470 /* 471 * Neither Motif DnD nor XDnD provide a mean for the target 472 * to notify the source that the pointer exits the drop site 473 * that occupies the whole top level. 474 * We detect this situation and post dragExit. 475 */ 476 if (targetAction != DnDConstants.ACTION_NONE) { 477 dragExit(x, y); 478 } 479 } 480 481 /* Update the global state. */ 482 doUpdateTargetWindow(subwindow, time); 483 484 if (dragProtocol != null) { 485 dragProtocol.sendEnterMessage(sourceFormats, 486 sourceAction, 487 sourceActions, 488 time); 489 } 490 } 491 } 492 493 /* 494 * DO NOT USE is_hint field of xmotion since it could not be set when we 495 * convert XKeyEvent or XButtonRelease to XMotionEvent. 496 */ 497 private void processMouseMove(XMotionEvent xmotion) { 498 if (!dragInProgress) { 499 return; 500 } 501 if (xRoot != xmotion.get_x_root() || yRoot != xmotion.get_y_root()) { 502 xRoot = xmotion.get_x_root(); 503 yRoot = xmotion.get_y_root(); 504 505 postDragSourceDragEvent(targetAction, 506 XWindow.getModifiers(xmotion.get_state(),0,0), 507 xRoot, yRoot, DISPATCH_MOUSE_MOVED); 508 } 509 510 if (eventState != xmotion.get_state()) { 511 if (updateSourceAction(xmotion.get_state()) && dragProtocol != null) { 512 postDragSourceDragEvent(targetAction, 513 XWindow.getModifiers(xmotion.get_state(),0,0), 514 xRoot, yRoot, DISPATCH_CHANGED); 515 } 516 eventState = xmotion.get_state(); 517 } 518 519 updateTargetWindow(xmotion); 520 521 if (dragProtocol != null) { 522 dragProtocol.sendMoveMessage(xmotion.get_x_root(), 523 xmotion.get_y_root(), 524 sourceAction, sourceActions, 525 xmotion.get_time()); 526 } 527 } 528 529 private void processDrop(XButtonEvent xbutton) { 530 try { 531 dragProtocol.initiateDrop(xbutton.get_x_root(), 532 xbutton.get_y_root(), 533 sourceAction, sourceActions, 534 xbutton.get_time()); 535 } catch (XException e) { 536 cleanup(xbutton.get_time()); 537 } 538 } 539 540 private boolean processProxyModeEvent(XEvent ev) { 541 if (getProxyModeSourceWindow() == 0) { 542 return false; 543 } 544 545 if (ev.get_type() != XConstants.ClientMessage) { 546 return false; 547 } 548 549 if (logger.isLoggable(PlatformLogger.Level.FINEST)) { 550 logger.finest(" proxyModeSourceWindow=" + 551 getProxyModeSourceWindow() + 552 " ev=" + ev); 553 } 554 555 XClientMessageEvent xclient = ev.get_xclient(); 556 557 Iterator<XDragSourceProtocol> dragProtocols = 558 XDragAndDropProtocols.getDragSourceProtocols(); 559 while (dragProtocols.hasNext()) { 560 XDragSourceProtocol dragProtocol = dragProtocols.next(); 561 if (dragProtocol.processProxyModeEvent(xclient, 562 getProxyModeSourceWindow())) { 563 return true; 564 } 565 } 566 567 return false; 568 } 569 570 /** 571 * The caller must own awtLock. 572 * 573 * @return true if the event was processed and shouldn't be passed along. 574 */ 575 private boolean doProcessEvent(XEvent ev) { 576 assert XToolkit.isAWTLockHeldByCurrentThread(); 577 578 if (processProxyModeEvent(ev)) { 579 return true; 580 } 581 582 if (!dndInProgress) { 583 return false; 584 } 585 586 switch (ev.get_type()) { 587 case XConstants.ClientMessage: { 588 XClientMessageEvent xclient = ev.get_xclient(); 589 return processClientMessage(xclient); 590 } 591 case XConstants.DestroyNotify: { 592 XDestroyWindowEvent xde = ev.get_xdestroywindow(); 593 594 /* Target crashed during drop processing - cleanup. */ 595 if (!dragInProgress && 596 dragProtocol != null && 597 xde.get_window() == dragProtocol.getTargetWindow()) { 598 cleanup(XConstants.CurrentTime); 599 return true; 600 } 601 /* Pass along */ 602 return false; 603 } 604 } 605 606 if (!dragInProgress) { 607 return false; 608 } 609 610 /* Process drag-only messages. */ 611 switch (ev.get_type()) { 612 case XConstants.KeyRelease: 613 case XConstants.KeyPress: { 614 XKeyEvent xkey = ev.get_xkey(); 615 long keysym = XlibWrapper.XKeycodeToKeysym(XToolkit.getDisplay(), 616 xkey.get_keycode(), 0); 617 switch ((int)keysym) { 618 case (int)XKeySymConstants.XK_Escape: { 619 if (ev.get_type() == XConstants.KeyRelease) { 620 cleanup(xkey.get_time()); 621 } 622 break; 623 } 624 case (int)XKeySymConstants.XK_Control_R: 625 case (int)XKeySymConstants.XK_Control_L: 626 case (int)XKeySymConstants.XK_Shift_R: 627 case (int)XKeySymConstants.XK_Shift_L: { 628 XlibWrapper.XQueryPointer(XToolkit.getDisplay(), 629 xkey.get_root(), 630 XlibWrapper.larg1, // root 631 XlibWrapper.larg2, // subwindow 632 XlibWrapper.larg3, // x_root 633 XlibWrapper.larg4, // y_root 634 XlibWrapper.larg5, // x 635 XlibWrapper.larg6, // y 636 XlibWrapper.larg7); // modifiers 637 XMotionEvent xmotion = new XMotionEvent(); 638 try { 639 xmotion.set_type(XConstants.MotionNotify); 640 xmotion.set_serial(xkey.get_serial()); 641 xmotion.set_send_event(xkey.get_send_event()); 642 xmotion.set_display(xkey.get_display()); 643 xmotion.set_window(xkey.get_window()); 644 xmotion.set_root(xkey.get_root()); 645 xmotion.set_subwindow(xkey.get_subwindow()); 646 xmotion.set_time(xkey.get_time()); 647 xmotion.set_x(xkey.get_x()); 648 xmotion.set_y(xkey.get_y()); 649 xmotion.set_x_root(xkey.get_x_root()); 650 xmotion.set_y_root(xkey.get_y_root()); 651 xmotion.set_state((int)Native.getLong(XlibWrapper.larg7)); 652 // we do not use this field, so it's unset for now 653 // xmotion.set_is_hint(???); 654 xmotion.set_same_screen(xkey.get_same_screen()); 655 656 //It's safe to use key event as motion event since we use only their common fields. 657 processMouseMove(xmotion); 658 } finally { 659 xmotion.dispose(); 660 } 661 break; 662 } 663 } 664 return true; 665 } 666 case XConstants.ButtonPress: 667 return true; 668 case XConstants.MotionNotify: 669 processMouseMove(ev.get_xmotion()); 670 return true; 671 case XConstants.ButtonRelease: { 672 XButtonEvent xbutton = ev.get_xbutton(); 673 /* 674 * Ignore the buttons above 20 due to the bit limit for 675 * InputEvent.BUTTON_DOWN_MASK. 676 * One more bit is reserved for FIRST_HIGH_BIT. 677 */ 678 if (xbutton.get_button() > SunToolkit.MAX_BUTTONS_SUPPORTED) { 679 return true; 680 } 681 682 /* 683 * On some X servers it could happen that ButtonRelease coordinates 684 * differ from the latest MotionNotify coordinates, so we need to 685 * process it as a mouse motion. 686 */ 687 XMotionEvent xmotion = new XMotionEvent(); 688 try { 689 xmotion.set_type(XConstants.MotionNotify); 690 xmotion.set_serial(xbutton.get_serial()); 691 xmotion.set_send_event(xbutton.get_send_event()); 692 xmotion.set_display(xbutton.get_display()); 693 xmotion.set_window(xbutton.get_window()); 694 xmotion.set_root(xbutton.get_root()); 695 xmotion.set_subwindow(xbutton.get_subwindow()); 696 xmotion.set_time(xbutton.get_time()); 697 xmotion.set_x(xbutton.get_x()); 698 xmotion.set_y(xbutton.get_y()); 699 xmotion.set_x_root(xbutton.get_x_root()); 700 xmotion.set_y_root(xbutton.get_y_root()); 701 xmotion.set_state(xbutton.get_state()); 702 // we do not use this field, so it's unset for now 703 // xmotion.set_is_hint(???); 704 xmotion.set_same_screen(xbutton.get_same_screen()); 705 706 //It's safe to use key event as motion event since we use only their common fields. 707 processMouseMove(xmotion); 708 } finally { 709 xmotion.dispose(); 710 } 711 if (xbutton.get_button() == XConstants.buttons[0] 712 || xbutton.get_button() == XConstants.buttons[1]) { 713 // drag is initiated with Button1 or Button2 pressed and 714 // ended on release of either of these buttons (as the same 715 // behavior was with our old Motif DnD-based implementation) 716 removeDnDGrab(xbutton.get_time()); 717 dragInProgress = false; 718 if (dragProtocol != null && targetAction != DnDConstants.ACTION_NONE) { 719 /* 720 * ACTION_NONE indicates that either the drop target rejects the 721 * drop or it haven't responded yet. The latter could happen in 722 * case of fast drag, slow target-server connection or slow 723 * drag notifications processing on the target side. 724 */ 725 processDrop(xbutton); 726 } else { 727 cleanup(xbutton.get_time()); 728 } 729 } 730 return true; 731 } 732 } 733 734 return false; 735 } 736 737 static boolean processEvent(XEvent ev) { 738 XToolkit.awtLock(); 739 try { 740 try { 741 return theInstance.doProcessEvent(ev); 742 } catch (XException e) { 743 e.printStackTrace(); 744 return false; 745 } 746 } finally { 747 XToolkit.awtUnlock(); 748 } 749 } 750 751 /* XDragSourceProtocolListener implementation */ 752 753 public void handleDragReply(int action) { 754 // NOTE: we have to use the current pointer location, since 755 // the target didn't specify the coordinates for the reply. 756 handleDragReply(action, xRoot, yRoot); 757 } 758 759 public void handleDragReply(int action, int x, int y) { 760 // NOTE: we have to use the current modifiers state, since 761 // the target didn't specify the modifiers state for the reply. 762 handleDragReply(action, xRoot, yRoot, XWindow.getModifiers(eventState,0,0)); 763 } 764 765 public void handleDragReply(int action, int x, int y, int modifiers) { 766 if (action == DnDConstants.ACTION_NONE && 767 targetAction != DnDConstants.ACTION_NONE) { 768 dragExit(x, y); 769 } else if (action != DnDConstants.ACTION_NONE) { 770 int type = 0; 771 772 if (targetAction == DnDConstants.ACTION_NONE) { 773 type = SunDragSourceContextPeer.DISPATCH_ENTER; 774 } else { 775 type = SunDragSourceContextPeer.DISPATCH_MOTION; 776 } 777 778 // Note that we use the modifiers state a 779 postDragSourceDragEvent(action, modifiers, x, y, type); 780 } 781 782 targetAction = action; 783 } 784 785 public void handleDragFinished() { 786 /* Assume that the drop was successful. */ 787 handleDragFinished(true); 788 } 789 790 public void handleDragFinished(boolean success) { 791 /* Assume that the performed drop action is the latest drop action 792 accepted by the drop target. */ 793 handleDragFinished(true, targetAction); 794 } 795 796 public void handleDragFinished(boolean success, int action) { 797 // NOTE: we have to use the current pointer location, since 798 // the target didn't specify the coordinates for the reply. 799 handleDragFinished(success, action, xRoot, yRoot); 800 } 801 802 public void handleDragFinished(boolean success, int action, int x, int y) { 803 dragDropFinished(success, action, x, y); 804 805 dndInProgress = false; 806 cleanup(XConstants.CurrentTime); 807 } 808 }