J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.awt.X11; |
| 27 | |
| 28 | import java.awt.dnd.DnDConstants; |
| 29 | |
| 30 | import java.nio.ByteOrder; |
| 31 | |
| 32 | import java.util.Arrays; |
| 33 | |
| 34 | import sun.misc.Unsafe; |
| 35 | |
| 36 | /** |
| 37 | * Motif DnD protocol global constants and convenience routines. |
| 38 | * |
| 39 | * @since 1.5 |
| 40 | */ |
| 41 | class MotifDnDConstants { |
| 42 | // Note that offsets in all native structures below do not depend on the |
| 43 | // architecture. |
| 44 | private static final Unsafe unsafe = XlibWrapper.unsafe; |
| 45 | static final XAtom XA_MOTIF_ATOM_0 = XAtom.get("_MOTIF_ATOM_0"); |
| 46 | static final XAtom XA_MOTIF_DRAG_WINDOW = XAtom.get("_MOTIF_DRAG_WINDOW"); |
| 47 | static final XAtom XA_MOTIF_DRAG_TARGETS = XAtom.get("_MOTIF_DRAG_TARGETS"); |
| 48 | static final XAtom XA_MOTIF_DRAG_INITIATOR_INFO = |
| 49 | XAtom.get("_MOTIF_DRAG_INITIATOR_INFO"); |
| 50 | static final XAtom XA_MOTIF_DRAG_RECEIVER_INFO = |
| 51 | XAtom.get("_MOTIF_DRAG_RECEIVER_INFO"); |
| 52 | static final XAtom XA_MOTIF_DRAG_AND_DROP_MESSAGE = |
| 53 | XAtom.get("_MOTIF_DRAG_AND_DROP_MESSAGE"); |
| 54 | static final XAtom XA_XmTRANSFER_SUCCESS = |
| 55 | XAtom.get("XmTRANSFER_SUCCESS"); |
| 56 | static final XAtom XA_XmTRANSFER_FAILURE = |
| 57 | XAtom.get("XmTRANSFER_FAILURE"); |
| 58 | static final XSelection MotifDnDSelection = |
| 59 | new XSelection(XA_MOTIF_ATOM_0, null); |
| 60 | |
| 61 | public static final byte MOTIF_DND_PROTOCOL_VERSION = 0; |
| 62 | |
| 63 | /* Supported protocol styles */ |
| 64 | public static final int MOTIF_PREFER_PREREGISTER_STYLE = 2; |
| 65 | public static final int MOTIF_PREFER_DYNAMIC_STYLE = 4; |
| 66 | public static final int MOTIF_DYNAMIC_STYLE = 5; |
| 67 | public static final int MOTIF_PREFER_RECEIVER_STYLE = 6; |
| 68 | |
| 69 | /* Info structure sizes */ |
| 70 | public static final int MOTIF_INITIATOR_INFO_SIZE = 8; |
| 71 | public static final int MOTIF_RECEIVER_INFO_SIZE = 16; |
| 72 | |
| 73 | /* Sender/reason message masks */ |
| 74 | public static final byte MOTIF_MESSAGE_REASON_MASK = (byte)0x7F; |
| 75 | public static final byte MOTIF_MESSAGE_SENDER_MASK = (byte)0x80; |
| 76 | public static final byte MOTIF_MESSAGE_FROM_RECEIVER = (byte)0x80; |
| 77 | public static final byte MOTIF_MESSAGE_FROM_INITIATOR = (byte)0; |
| 78 | |
| 79 | /* Message flags masks and shifts */ |
| 80 | public static final int MOTIF_DND_ACTION_MASK = 0x000F; |
| 81 | public static final int MOTIF_DND_ACTION_SHIFT = 0; |
| 82 | public static final int MOTIF_DND_STATUS_MASK = 0x00F0; |
| 83 | public static final int MOTIF_DND_STATUS_SHIFT = 4; |
| 84 | public static final int MOTIF_DND_ACTIONS_MASK = 0x0F00; |
| 85 | public static final int MOTIF_DND_ACTIONS_SHIFT = 8; |
| 86 | |
| 87 | /* message type constants */ |
| 88 | public static final byte TOP_LEVEL_ENTER = 0; |
| 89 | public static final byte TOP_LEVEL_LEAVE = 1; |
| 90 | public static final byte DRAG_MOTION = 2; |
| 91 | public static final byte DROP_SITE_ENTER = 3; |
| 92 | public static final byte DROP_SITE_LEAVE = 4; |
| 93 | public static final byte DROP_START = 5; |
| 94 | public static final byte DROP_FINISH = 6; |
| 95 | public static final byte DRAG_DROP_FINISH = 7; |
| 96 | public static final byte OPERATION_CHANGED = 8; |
| 97 | |
| 98 | /* drop action constants */ |
| 99 | public static final int MOTIF_DND_NOOP = 0; |
| 100 | public static final int MOTIF_DND_MOVE = 1 << 0; |
| 101 | public static final int MOTIF_DND_COPY = 1 << 1; |
| 102 | public static final int MOTIF_DND_LINK = 1 << 2; |
| 103 | |
| 104 | /* drop site status constants */ |
| 105 | public static final byte MOTIF_NO_DROP_SITE = (byte)1; |
| 106 | public static final byte MOTIF_INVALID_DROP_SITE = (byte)2; |
| 107 | public static final byte MOTIF_VALID_DROP_SITE = (byte)3; |
| 108 | |
| 109 | private static long readMotifWindow() throws XException { |
| 110 | long defaultScreenNumber = XlibWrapper.DefaultScreen(XToolkit.getDisplay()); |
| 111 | long defaultRootWindow = |
| 112 | XlibWrapper.RootWindow(XToolkit.getDisplay(), defaultScreenNumber); |
| 113 | |
| 114 | long motifWindow = 0; |
| 115 | |
| 116 | WindowPropertyGetter wpg = new WindowPropertyGetter(defaultRootWindow, |
| 117 | XA_MOTIF_DRAG_WINDOW, |
| 118 | 0, 1, |
| 119 | false, |
| 120 | XlibWrapper.AnyPropertyType); |
| 121 | try { |
| 122 | int status = wpg.execute(XToolkit.IgnoreBadWindowHandler); |
| 123 | |
| 124 | if (status == XlibWrapper.Success && |
| 125 | wpg.getData() != 0 && |
| 126 | wpg.getActualType() == XAtom.XA_WINDOW && |
| 127 | wpg.getActualFormat() == 32 && |
| 128 | wpg.getNumberOfItems() == 1) { |
| 129 | long data = wpg.getData(); |
| 130 | // XID is CARD32. |
| 131 | motifWindow = Native.getLong(data); |
| 132 | } |
| 133 | |
| 134 | return motifWindow; |
| 135 | } finally { |
| 136 | wpg.dispose(); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | private static long createMotifWindow() throws XException { |
| 141 | assert XToolkit.isAWTLockHeldByCurrentThread(); |
| 142 | |
| 143 | long defaultScreenNumber = |
| 144 | XlibWrapper.DefaultScreen(XToolkit.getDisplay()); |
| 145 | long defaultRootWindow = |
| 146 | XlibWrapper.RootWindow(XToolkit.getDisplay(), defaultScreenNumber); |
| 147 | |
| 148 | long motifWindow = 0; |
| 149 | |
| 150 | long displayString = XlibWrapper.XDisplayString(XToolkit.getDisplay()); |
| 151 | |
| 152 | if (displayString == 0) { |
| 153 | throw new XException("XDisplayString returns NULL"); |
| 154 | } |
| 155 | |
| 156 | long newDisplay = XlibWrapper.XOpenDisplay(displayString); |
| 157 | |
| 158 | if (newDisplay == 0) { |
| 159 | throw new XException("XOpenDisplay returns NULL"); |
| 160 | } |
| 161 | |
| 162 | XlibWrapper.XGrabServer(newDisplay); |
| 163 | |
| 164 | try { |
| 165 | XlibWrapper.XSetCloseDownMode(newDisplay, (int)XlibWrapper.RetainPermanent); |
| 166 | |
| 167 | XSetWindowAttributes xwa = new XSetWindowAttributes(); |
| 168 | |
| 169 | try { |
| 170 | xwa.set_override_redirect(true); |
| 171 | xwa.set_event_mask(XlibWrapper.PropertyChangeMask); |
| 172 | |
| 173 | motifWindow = XlibWrapper.XCreateWindow(newDisplay, defaultRootWindow, |
| 174 | -10, -10, 1, 1, 0, 0, |
| 175 | XlibWrapper.InputOnly, |
| 176 | XlibWrapper.CopyFromParent, |
| 177 | (XlibWrapper.CWOverrideRedirect | |
| 178 | XlibWrapper.CWEventMask), |
| 179 | xwa.pData); |
| 180 | |
| 181 | if (motifWindow == 0) { |
| 182 | throw new XException("XCreateWindow returns NULL"); |
| 183 | } |
| 184 | |
| 185 | XlibWrapper.XMapWindow(newDisplay, motifWindow); |
| 186 | |
| 187 | long data = Native.allocateLongArray(1); |
| 188 | |
| 189 | try { |
| 190 | Native.putLong(data, motifWindow); |
| 191 | |
| 192 | XToolkit.WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler); |
| 193 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), |
| 194 | defaultRootWindow, |
| 195 | XA_MOTIF_DRAG_WINDOW.getAtom(), |
| 196 | XAtom.XA_WINDOW, 32, |
| 197 | XlibWrapper.PropModeReplace, |
| 198 | data, 1); |
| 199 | |
| 200 | XToolkit.RESTORE_XERROR_HANDLER(); |
| 201 | |
| 202 | if (XToolkit.saved_error != null && |
| 203 | XToolkit.saved_error.get_error_code() != XlibWrapper.Success) { |
| 204 | throw new XException("Cannot write motif drag window handle."); |
| 205 | } |
| 206 | |
| 207 | return motifWindow; |
| 208 | } finally { |
| 209 | unsafe.freeMemory(data); |
| 210 | } |
| 211 | } finally { |
| 212 | xwa.dispose(); |
| 213 | } |
| 214 | } finally { |
| 215 | XlibWrapper.XUngrabServer(newDisplay); |
| 216 | XlibWrapper.XCloseDisplay(newDisplay); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | private static long getMotifWindow() throws XException { |
| 221 | /* |
| 222 | * Note: it is unsafe to cache the motif drag window handle, as another |
| 223 | * client can change the _MOTIF_DRAG_WINDOW property on the root, the handle |
| 224 | * becomes out-of-sync and all subsequent drag operations will fail. |
| 225 | */ |
| 226 | long motifWindow = readMotifWindow(); |
| 227 | if (motifWindow == 0) { |
| 228 | motifWindow = createMotifWindow(); |
| 229 | } |
| 230 | return motifWindow; |
| 231 | } |
| 232 | |
| 233 | public static final class Swapper { |
| 234 | public static short swap(short s) { |
| 235 | return (short)(((s & 0xFF00) >>> 8) | ((s & 0xFF) << 8)); |
| 236 | } |
| 237 | public static int swap(int i) { |
| 238 | return ((i & 0xFF000000) >>> 24) | ((i & 0x00FF0000) >>> 8) | |
| 239 | ((i & 0x0000FF00) << 8) | ((i & 0x000000FF) << 24); |
| 240 | } |
| 241 | |
| 242 | public static short getShort(long data, byte order) { |
| 243 | short s = unsafe.getShort(data); |
| 244 | if (order != MotifDnDConstants.getByteOrderByte()) { |
| 245 | return swap(s); |
| 246 | } else { |
| 247 | return s; |
| 248 | } |
| 249 | } |
| 250 | public static int getInt(long data, byte order) { |
| 251 | int i = unsafe.getInt(data); |
| 252 | if (order != MotifDnDConstants.getByteOrderByte()) { |
| 253 | return swap(i); |
| 254 | } else { |
| 255 | return i; |
| 256 | } |
| 257 | } |
| 258 | } |
| 259 | |
| 260 | /** |
| 261 | * DragBSI.h: |
| 262 | * |
| 263 | * typedef struct { |
| 264 | * BYTE byte_order; |
| 265 | * BYTE protocol_version; |
| 266 | * CARD16 num_target_lists B16; |
| 267 | * CARD32 heap_offset B32; |
| 268 | * } xmMotifTargetsPropertyRec; |
| 269 | */ |
| 270 | private static long[][] getTargetListTable(long motifWindow) |
| 271 | throws XException { |
| 272 | |
| 273 | WindowPropertyGetter wpg = new WindowPropertyGetter(motifWindow, |
| 274 | XA_MOTIF_DRAG_TARGETS, |
| 275 | 0, 100000L, |
| 276 | false, |
| 277 | XA_MOTIF_DRAG_TARGETS.getAtom()); |
| 278 | try { |
| 279 | int status = wpg.execute(XToolkit.IgnoreBadWindowHandler); |
| 280 | |
| 281 | if (status != XlibWrapper.Success |
| 282 | || wpg.getActualType() != XA_MOTIF_DRAG_TARGETS.getAtom() |
| 283 | || wpg.getData() == 0) { |
| 284 | |
| 285 | return null; |
| 286 | } |
| 287 | |
| 288 | long data = wpg.getData(); |
| 289 | |
| 290 | if (unsafe.getByte(data + 1) != MOTIF_DND_PROTOCOL_VERSION) { |
| 291 | return null; |
| 292 | } |
| 293 | |
| 294 | boolean swapNeeded = unsafe.getByte(data + 0) != getByteOrderByte(); |
| 295 | |
| 296 | short numTargetLists = unsafe.getShort(data + 2); |
| 297 | |
| 298 | if (swapNeeded) { |
| 299 | numTargetLists = Swapper.swap(numTargetLists); |
| 300 | } |
| 301 | |
| 302 | long[][] table = new long[numTargetLists][]; |
| 303 | ByteOrder byteOrder = ByteOrder.nativeOrder(); |
| 304 | if (swapNeeded) { |
| 305 | byteOrder = (byteOrder == ByteOrder.LITTLE_ENDIAN) ? |
| 306 | ByteOrder.BIG_ENDIAN : ByteOrder.LITTLE_ENDIAN; |
| 307 | } |
| 308 | |
| 309 | long bufptr = data + 8; |
| 310 | for (short i = 0; i < numTargetLists; i++) { |
| 311 | short numTargets = unsafe.getShort(bufptr); |
| 312 | bufptr += 2; |
| 313 | if (swapNeeded) { |
| 314 | numTargets = Swapper.swap(numTargets); |
| 315 | } |
| 316 | |
| 317 | table[i] = new long[numTargets]; |
| 318 | |
| 319 | for (short j = 0; j < numTargets; j++) { |
| 320 | // NOTE: cannot use Unsafe.getInt(), since it crashes on |
| 321 | // Solaris/Sparc if the address is not a multiple of 4. |
| 322 | int target = 0; |
| 323 | if (byteOrder == ByteOrder.LITTLE_ENDIAN) { |
| 324 | for (int idx = 0; idx < 4; idx++) { |
| 325 | target |= (unsafe.getByte(bufptr + idx) << 8*idx) |
| 326 | & (0xFF << 8*idx); |
| 327 | } |
| 328 | } else { |
| 329 | for (int idx = 0; idx < 4; idx++) { |
| 330 | target |= (unsafe.getByte(bufptr + idx) << 8*(3-idx)) |
| 331 | & (0xFF << 8*(3-idx)); |
| 332 | } |
| 333 | } |
| 334 | // NOTE: don't need to swap, since we read it in the proper |
| 335 | // order already. |
| 336 | table[i][j] = target; |
| 337 | bufptr += 4; |
| 338 | } |
| 339 | } |
| 340 | return table; |
| 341 | } finally { |
| 342 | wpg.dispose(); |
| 343 | } |
| 344 | } |
| 345 | |
| 346 | private static void putTargetListTable(long motifWindow, long[][] table) |
| 347 | throws XException { |
| 348 | assert XToolkit.isAWTLockHeldByCurrentThread(); |
| 349 | |
| 350 | int tableSize = 8; /* The size of leading xmMotifTargetsPropertyRec. */ |
| 351 | |
| 352 | for (int i = 0; i < table.length; i++) { |
| 353 | tableSize += table[i].length * 4 + 2; |
| 354 | } |
| 355 | |
| 356 | long data = unsafe.allocateMemory(tableSize); |
| 357 | |
| 358 | try { |
| 359 | // BYTE byte_order; |
| 360 | unsafe.putByte(data + 0, getByteOrderByte()); |
| 361 | // BYTE protocol_version; |
| 362 | unsafe.putByte(data + 1, MOTIF_DND_PROTOCOL_VERSION); |
| 363 | // CARD16 num_target_lists B16; |
| 364 | unsafe.putShort(data + 2, (short)table.length); |
| 365 | // CARD32 heap_offset B32; |
| 366 | unsafe.putInt(data + 4, tableSize); |
| 367 | |
| 368 | long bufptr = data + 8; |
| 369 | |
| 370 | for (int i = 0; i < table.length; i++) { |
| 371 | unsafe.putShort(bufptr, (short)table[i].length); |
| 372 | bufptr += 2; |
| 373 | |
| 374 | for (int j = 0; j < table[i].length; j++) { |
| 375 | int target = (int)table[i][j]; |
| 376 | // NOTE: cannot use Unsafe.putInt(), since it crashes on |
| 377 | // Solaris/Sparc if the address is not a multiple of 4. |
| 378 | if (ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN) { |
| 379 | for (int idx = 0; idx < 4; idx++) { |
| 380 | byte b = (byte)((target & (0xFF << (8*idx))) >> (8*idx)); |
| 381 | unsafe.putByte(bufptr + idx, b); |
| 382 | } |
| 383 | } else { |
| 384 | for (int idx = 0; idx < 4; idx++) { |
| 385 | byte b = (byte)((target & (0xFF << (8*idx))) >> (8*idx)); |
| 386 | unsafe.putByte(bufptr + (3-idx), b); |
| 387 | } |
| 388 | } |
| 389 | bufptr += 4; |
| 390 | } |
| 391 | } |
| 392 | |
| 393 | XToolkit.WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler); |
| 394 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), |
| 395 | motifWindow, |
| 396 | XA_MOTIF_DRAG_TARGETS.getAtom(), |
| 397 | XA_MOTIF_DRAG_TARGETS.getAtom(), 8, |
| 398 | XlibWrapper.PropModeReplace, |
| 399 | data, tableSize); |
| 400 | |
| 401 | XToolkit.RESTORE_XERROR_HANDLER(); |
| 402 | |
| 403 | if (XToolkit.saved_error != null && |
| 404 | XToolkit.saved_error.get_error_code() != XlibWrapper.Success) { |
| 405 | |
| 406 | // Create a new motif window and retry. |
| 407 | motifWindow = createMotifWindow(); |
| 408 | |
| 409 | XToolkit.WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler); |
| 410 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), |
| 411 | motifWindow, |
| 412 | XA_MOTIF_DRAG_TARGETS.getAtom(), |
| 413 | XA_MOTIF_DRAG_TARGETS.getAtom(), 8, |
| 414 | XlibWrapper.PropModeReplace, |
| 415 | data, tableSize); |
| 416 | |
| 417 | XToolkit.RESTORE_XERROR_HANDLER(); |
| 418 | |
| 419 | if (XToolkit.saved_error != null && |
| 420 | XToolkit.saved_error.get_error_code() != XlibWrapper.Success) { |
| 421 | throw new XException("Cannot write motif drag targets property."); |
| 422 | } |
| 423 | } |
| 424 | } finally { |
| 425 | unsafe.freeMemory(data); |
| 426 | } |
| 427 | } |
| 428 | |
| 429 | static int getIndexForTargetList(long[] formats) throws XException { |
| 430 | assert XToolkit.isAWTLockHeldByCurrentThread(); |
| 431 | |
| 432 | if (formats.length > 0) { |
| 433 | // Make a defensive copy. |
| 434 | formats = (long[])formats.clone(); |
| 435 | |
| 436 | Arrays.sort(formats); |
| 437 | } |
| 438 | |
| 439 | // NOTE: getMotifWindow() should never be called if the server is |
| 440 | // grabbed. This will lock up the application as it grabs the server |
| 441 | // itself. |
| 442 | // Since we don't grab the server before getMotifWindow(), another |
| 443 | // client might replace motif window after we read it from the root, but |
| 444 | // before we grab the server. |
| 445 | // We cannot resolve this problem, but we believe that this scenario is |
| 446 | // very unlikely to happen. |
| 447 | long motifWindow = getMotifWindow(); |
| 448 | |
| 449 | XlibWrapper.XGrabServer(XToolkit.getDisplay()); |
| 450 | |
| 451 | try { |
| 452 | long[][] table = getTargetListTable(motifWindow); |
| 453 | |
| 454 | if (table != null) { |
| 455 | for (int i = 0; i < table.length; i++) { |
| 456 | boolean equals = true; |
| 457 | if (table[i].length == formats.length) { |
| 458 | for (int j = 0; j < table[i].length; j++) { |
| 459 | if (table[i][j] != formats[j]) { |
| 460 | equals = false; |
| 461 | break; |
| 462 | } |
| 463 | } |
| 464 | } else { |
| 465 | equals = false; |
| 466 | } |
| 467 | |
| 468 | if (equals) { |
| 469 | XlibWrapper.XUngrabServer(XToolkit.getDisplay()); |
| 470 | return i; |
| 471 | } |
| 472 | } |
| 473 | } else { |
| 474 | // Create a new table. |
| 475 | // The first two entries must always be the same. |
| 476 | // (see DragBS.c) |
| 477 | table = new long[2][]; |
| 478 | table[0] = new long[] { 0 }; |
| 479 | table[1] = new long[] { XAtom.XA_STRING }; |
| 480 | } |
| 481 | |
| 482 | /* Index not found - expand the targets table. */ |
| 483 | long[][] new_table = new long[table.length + 1][]; |
| 484 | |
| 485 | /* Copy the old contents to the new table. */ |
| 486 | for (int i = 0; i < table.length; i++) { |
| 487 | new_table[i] = table[i]; |
| 488 | } |
| 489 | |
| 490 | /* Fill in the new entry */ |
| 491 | new_table[new_table.length - 1] = formats; |
| 492 | |
| 493 | putTargetListTable(motifWindow, new_table); |
| 494 | |
| 495 | return new_table.length - 1; |
| 496 | } finally { |
| 497 | XlibWrapper.XUngrabServer(XToolkit.getDisplay()); |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | static long[] getTargetListForIndex(int index) { |
| 502 | long motifWindow = getMotifWindow(); |
| 503 | long[][] table = getTargetListTable(motifWindow); |
| 504 | |
| 505 | if (index < 0 || index >= table.length) { |
| 506 | return new long[0]; |
| 507 | } else { |
| 508 | return table[index]; |
| 509 | } |
| 510 | } |
| 511 | |
| 512 | static byte getByteOrderByte() { |
| 513 | // 'l' - for little endian, 'B' - for big endian. |
| 514 | return ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN ? |
| 515 | (byte)0x6C : (byte)0x42; |
| 516 | } |
| 517 | |
| 518 | static void writeDragInitiatorInfoStruct(long window, int index) throws XException { |
| 519 | assert XToolkit.isAWTLockHeldByCurrentThread(); |
| 520 | |
| 521 | long structData = unsafe.allocateMemory(MOTIF_INITIATOR_INFO_SIZE); |
| 522 | |
| 523 | try { |
| 524 | // BYTE byte_order |
| 525 | unsafe.putByte(structData, getByteOrderByte()); |
| 526 | // BYTE protocol_version |
| 527 | unsafe.putByte(structData + 1, MOTIF_DND_PROTOCOL_VERSION); |
| 528 | // CARD16 protocol_version |
| 529 | unsafe.putShort(structData + 2, (short)index); |
| 530 | // CARD32 icc_handle |
| 531 | unsafe.putInt(structData + 4, (int)XA_MOTIF_ATOM_0.getAtom()); |
| 532 | |
| 533 | XToolkit.WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler); |
| 534 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), window, |
| 535 | XA_MOTIF_ATOM_0.getAtom(), |
| 536 | XA_MOTIF_DRAG_INITIATOR_INFO.getAtom(), |
| 537 | 8, XlibWrapper.PropModeReplace, |
| 538 | structData, MOTIF_INITIATOR_INFO_SIZE); |
| 539 | XToolkit.RESTORE_XERROR_HANDLER(); |
| 540 | |
| 541 | if (XToolkit.saved_error != null && |
| 542 | XToolkit.saved_error.get_error_code() != XlibWrapper.Success) { |
| 543 | throw new XException("Cannot write drag initiator info"); |
| 544 | } |
| 545 | } finally { |
| 546 | unsafe.freeMemory(structData); |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | static void writeDragReceiverInfoStruct(long window) throws XException { |
| 551 | assert XToolkit.isAWTLockHeldByCurrentThread(); |
| 552 | |
| 553 | int dataSize = MotifDnDConstants.MOTIF_RECEIVER_INFO_SIZE; |
| 554 | long data = unsafe.allocateMemory(dataSize); |
| 555 | |
| 556 | try { |
| 557 | unsafe.putByte(data, MotifDnDConstants.getByteOrderByte()); /* byte order */ |
| 558 | unsafe.putByte(data + 1, MotifDnDConstants.MOTIF_DND_PROTOCOL_VERSION); /* protocol version */ |
| 559 | unsafe.putByte(data + 2, (byte)MotifDnDConstants.MOTIF_DYNAMIC_STYLE); /* protocol style */ |
| 560 | unsafe.putByte(data + 3, (byte)0); /* pad */ |
| 561 | unsafe.putInt(data + 4, (int)window); /* proxy window */ |
| 562 | unsafe.putShort(data + 8, (short)0); /* num_drop_sites */ |
| 563 | unsafe.putShort(data + 10, (short)0); /* pad */ |
| 564 | unsafe.putInt(data + 12, dataSize); |
| 565 | |
| 566 | XToolkit.WITH_XERROR_HANDLER(XWM.VerifyChangePropertyHandler); |
| 567 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), window, |
| 568 | XA_MOTIF_DRAG_RECEIVER_INFO.getAtom(), |
| 569 | XA_MOTIF_DRAG_RECEIVER_INFO.getAtom(), |
| 570 | 8, XlibWrapper.PropModeReplace, |
| 571 | data, dataSize); |
| 572 | XToolkit.RESTORE_XERROR_HANDLER(); |
| 573 | |
| 574 | if (XToolkit.saved_error != null && |
| 575 | XToolkit.saved_error.get_error_code() != XlibWrapper.Success) { |
| 576 | throw new XException("Cannot write Motif receiver info property"); |
| 577 | } |
| 578 | } finally { |
| 579 | unsafe.freeMemory(data); |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | public static int getMotifActionsForJavaActions(int javaActions) { |
| 584 | int motifActions = MOTIF_DND_NOOP; |
| 585 | |
| 586 | if ((javaActions & DnDConstants.ACTION_MOVE) != 0) { |
| 587 | motifActions |= MOTIF_DND_MOVE; |
| 588 | } |
| 589 | if ((javaActions & DnDConstants.ACTION_COPY) != 0) { |
| 590 | motifActions |= MOTIF_DND_COPY; |
| 591 | } |
| 592 | if ((javaActions & DnDConstants.ACTION_LINK) != 0) { |
| 593 | motifActions |= MOTIF_DND_LINK; |
| 594 | } |
| 595 | |
| 596 | return motifActions; |
| 597 | } |
| 598 | |
| 599 | public static int getJavaActionsForMotifActions(int motifActions) { |
| 600 | int javaActions = DnDConstants.ACTION_NONE; |
| 601 | |
| 602 | if ((motifActions & MOTIF_DND_MOVE) != 0) { |
| 603 | javaActions |= DnDConstants.ACTION_MOVE; |
| 604 | } |
| 605 | if ((motifActions & MOTIF_DND_COPY) != 0) { |
| 606 | javaActions |= DnDConstants.ACTION_COPY; |
| 607 | } |
| 608 | if ((motifActions & MOTIF_DND_LINK) != 0) { |
| 609 | javaActions |= DnDConstants.ACTION_LINK; |
| 610 | } |
| 611 | |
| 612 | return javaActions; |
| 613 | } |
| 614 | } |