J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2003-2007 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.datatransfer.Transferable; |
| 29 | |
| 30 | import java.io.ByteArrayOutputStream; |
| 31 | import java.io.IOException; |
| 32 | |
| 33 | import java.util.Hashtable; |
| 34 | import java.util.Map; |
| 35 | import java.util.Set; |
| 36 | import java.util.HashSet; |
| 37 | import java.util.Collections; |
| 38 | |
| 39 | import sun.awt.AppContext; |
| 40 | import sun.awt.SunToolkit; |
| 41 | import sun.awt.UNIXToolkit; |
| 42 | |
| 43 | import sun.awt.datatransfer.DataTransferer; |
| 44 | |
| 45 | /** |
| 46 | * A class which interfaces with the X11 selection service. |
| 47 | */ |
| 48 | public class XSelection { |
| 49 | |
| 50 | /* Maps atoms to XSelection instances. */ |
| 51 | private static final Hashtable<XAtom, XSelection> table = new Hashtable<XAtom, XSelection>(); |
| 52 | /* Prevents from parallel selection data request processing. */ |
| 53 | private static final Object lock = new Object(); |
| 54 | /* The property in which the owner should place the requested data. */ |
| 55 | private static final XAtom selectionPropertyAtom = XAtom.get("XAWT_SELECTION"); |
| 56 | /* The maximal length of the property data. */ |
| 57 | public static final long MAX_LENGTH = 1000000; |
| 58 | /* |
| 59 | * The maximum data size for ChangeProperty request. |
| 60 | * 100 is for the structure prepended to the request. |
| 61 | */ |
| 62 | public static final int MAX_PROPERTY_SIZE; |
| 63 | static { |
| 64 | XToolkit.awtLock(); |
| 65 | try { |
| 66 | MAX_PROPERTY_SIZE = |
| 67 | (int)(XlibWrapper.XMaxRequestSize(XToolkit.getDisplay()) * 4 - 100); |
| 68 | } finally { |
| 69 | XToolkit.awtUnlock(); |
| 70 | } |
| 71 | } |
| 72 | /* The selection timeout. */ |
| 73 | private static long SELECTION_TIMEOUT = UNIXToolkit.getDatatransferTimeout(); |
| 74 | |
| 75 | /* The PropertyNotify event handler for incremental data transfer. */ |
| 76 | private static final XEventDispatcher incrementalTransferHandler = |
| 77 | new IncrementalTransferHandler(); |
| 78 | /* The context for the current request - protected with awtLock. */ |
| 79 | private static WindowPropertyGetter propertyGetter = null; |
| 80 | |
| 81 | // The orders of the lock acquisition: |
| 82 | // XClipboard -> XSelection -> awtLock. |
| 83 | // lock -> awtLock. |
| 84 | |
| 85 | /* The X atom for the underlying selection. */ |
| 86 | private final XAtom selectionAtom; |
| 87 | /* |
| 88 | * XClipboard.run() is to be called when we lose ownership. |
| 89 | * XClipbioard.checkChange() is to be called when tracking changes of flavors. |
| 90 | */ |
| 91 | private final XClipboard clipboard; |
| 92 | |
| 93 | /* |
| 94 | * Owner-related variables - protected with synchronized (this). |
| 95 | */ |
| 96 | |
| 97 | /* The contents supplied by the current owner. */ |
| 98 | private Transferable contents = null; |
| 99 | /* The format-to-flavor map for the current owner. */ |
| 100 | private Map formatMap = null; |
| 101 | /* The formats supported by the current owner was set. */ |
| 102 | private long[] formats = null; |
| 103 | /* The AppContext in which the current owner was set. */ |
| 104 | private AppContext appContext = null; |
| 105 | // The X server time of the last XConvertSelection() call; |
| 106 | // protected with 'lock' and awtLock. |
| 107 | private static long lastRequestServerTime; |
| 108 | /* The time at which the current owner was set. */ |
| 109 | private long ownershipTime = 0; |
| 110 | // True if we are the owner of this selection. |
| 111 | private boolean isOwner; |
| 112 | // The property in which the owner should place requested targets |
| 113 | // when tracking changes of available data flavors (practically targets). |
| 114 | private volatile XAtom targetsPropertyAtom; |
| 115 | // A set of these property atoms. |
| 116 | private static volatile Set targetsPropertyAtoms; |
| 117 | // The flag used not to call XConvertSelection() if the previous SelectionNotify |
| 118 | // has not been processed by checkChange(). |
| 119 | private volatile boolean isSelectionNotifyProcessed; |
| 120 | // Time of calling XConvertSelection(). |
| 121 | private long convertSelectionTime; |
| 122 | |
| 123 | |
| 124 | static { |
| 125 | XToolkit.addEventDispatcher(XWindow.getXAWTRootWindow().getWindow(), |
| 126 | new SelectionEventHandler()); |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * Returns the XSelection object for the specified selection atom or |
| 131 | * <code>null</code> if none exists. |
| 132 | */ |
| 133 | static XSelection getSelection(XAtom atom) { |
| 134 | return table.get(atom); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Creates a selection object. |
| 139 | * |
| 140 | * @param atom the selection atom. |
| 141 | * @param clpbrd the corresponding clipoboard |
| 142 | * @exception NullPointerException if atom is <code>null</code>. |
| 143 | */ |
| 144 | public XSelection(XAtom atom, XClipboard clpbrd) { |
| 145 | if (atom == null) { |
| 146 | throw new NullPointerException("Null atom"); |
| 147 | } |
| 148 | selectionAtom = atom; |
| 149 | clipboard = clpbrd; |
| 150 | table.put(selectionAtom, this); |
| 151 | } |
| 152 | |
| 153 | public XAtom getSelectionAtom() { |
| 154 | return selectionAtom; |
| 155 | } |
| 156 | |
| 157 | void initializeSelectionForTrackingChanges() { |
| 158 | targetsPropertyAtom = XAtom.get("XAWT_TARGETS_OF_SELECTION:" + selectionAtom.getName()); |
| 159 | if (targetsPropertyAtoms == null) { |
| 160 | targetsPropertyAtoms = Collections.synchronizedSet(new HashSet(2)); |
| 161 | } |
| 162 | targetsPropertyAtoms.add(Long.valueOf(targetsPropertyAtom.getAtom())); |
| 163 | // for XConvertSelection() to be called for the first time in getTargetsDelayed() |
| 164 | isSelectionNotifyProcessed = true; |
| 165 | } |
| 166 | |
| 167 | void deinitializeSelectionForTrackingChanges() { |
| 168 | if (targetsPropertyAtoms != null && targetsPropertyAtom != null) { |
| 169 | targetsPropertyAtoms.remove(Long.valueOf(targetsPropertyAtom.getAtom())); |
| 170 | } |
| 171 | isSelectionNotifyProcessed = false; |
| 172 | } |
| 173 | |
| 174 | public synchronized boolean setOwner(Transferable contents, Map formatMap, |
| 175 | long[] formats, long time) { |
| 176 | long owner = XWindow.getXAWTRootWindow().getWindow(); |
| 177 | long selection = selectionAtom.getAtom(); |
| 178 | |
| 179 | // ICCCM prescribes that CurrentTime should not be used for SetSelectionOwner. |
| 180 | if (time == XlibWrapper.CurrentTime) { |
| 181 | time = XToolkit.getCurrentServerTime(); |
| 182 | } |
| 183 | |
| 184 | this.contents = contents; |
| 185 | this.formatMap = formatMap; |
| 186 | this.formats = formats; |
| 187 | this.appContext = AppContext.getAppContext(); |
| 188 | this.ownershipTime = time; |
| 189 | |
| 190 | XToolkit.awtLock(); |
| 191 | try { |
| 192 | XlibWrapper.XSetSelectionOwner(XToolkit.getDisplay(), |
| 193 | selection, owner, time); |
| 194 | if (XlibWrapper.XGetSelectionOwner(XToolkit.getDisplay(), |
| 195 | selection) != owner) { |
| 196 | |
| 197 | reset(); |
| 198 | return false; |
| 199 | } |
| 200 | isOwner = true; |
| 201 | if (clipboard != null) { |
| 202 | clipboard.checkChangeHere(contents); |
| 203 | } |
| 204 | return true; |
| 205 | } finally { |
| 206 | XToolkit.awtUnlock(); |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | /** |
| 211 | * Blocks the current thread till SelectionNotify or PropertyNotify (in case of INCR transfer) arrives. |
| 212 | */ |
| 213 | private static void waitForSelectionNotify(WindowPropertyGetter dataGetter) throws InterruptedException { |
| 214 | long startTime = System.currentTimeMillis(); |
| 215 | XToolkit.awtLock(); |
| 216 | try { |
| 217 | do { |
| 218 | DataTransferer.getInstance().processDataConversionRequests(); |
| 219 | XToolkit.awtLockWait(250); |
| 220 | } while (propertyGetter == dataGetter && System.currentTimeMillis() < startTime + SELECTION_TIMEOUT); |
| 221 | } finally { |
| 222 | XToolkit.awtUnlock(); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | /* |
| 227 | * Returns the list of atoms that represent the targets for which an attempt |
| 228 | * to convert the current selection will succeed. |
| 229 | */ |
| 230 | public long[] getTargets(long time) { |
| 231 | if (XToolkit.isToolkitThread()) { |
| 232 | throw new Error("UNIMPLEMENTED"); |
| 233 | } |
| 234 | |
| 235 | long[] formats = null; |
| 236 | |
| 237 | synchronized (lock) { |
| 238 | SELECTION_TIMEOUT = UNIXToolkit.getDatatransferTimeout(); |
| 239 | |
| 240 | WindowPropertyGetter targetsGetter = |
| 241 | new WindowPropertyGetter(XWindow.getXAWTRootWindow().getWindow(), |
| 242 | selectionPropertyAtom, 0, MAX_LENGTH, |
| 243 | true, XlibWrapper.AnyPropertyType); |
| 244 | |
| 245 | try { |
| 246 | XToolkit.awtLock(); |
| 247 | try { |
| 248 | propertyGetter = targetsGetter; |
| 249 | lastRequestServerTime = time; |
| 250 | |
| 251 | XlibWrapper.XConvertSelection(XToolkit.getDisplay(), |
| 252 | getSelectionAtom().getAtom(), |
| 253 | XDataTransferer.TARGETS_ATOM.getAtom(), |
| 254 | selectionPropertyAtom.getAtom(), |
| 255 | XWindow.getXAWTRootWindow().getWindow(), |
| 256 | time); |
| 257 | |
| 258 | // If the owner doesn't respond within the |
| 259 | // SELECTION_TIMEOUT, we report conversion failure. |
| 260 | try { |
| 261 | waitForSelectionNotify(targetsGetter); |
| 262 | } catch (InterruptedException ie) { |
| 263 | return new long[0]; |
| 264 | } finally { |
| 265 | propertyGetter = null; |
| 266 | } |
| 267 | } finally { |
| 268 | XToolkit.awtUnlock(); |
| 269 | } |
| 270 | formats = getFormats(targetsGetter); |
| 271 | } finally { |
| 272 | targetsGetter.dispose(); |
| 273 | } |
| 274 | } |
| 275 | return formats; |
| 276 | } |
| 277 | |
| 278 | private static long[] getFormats(WindowPropertyGetter targetsGetter) { |
| 279 | long[] formats = null; |
| 280 | |
| 281 | if (targetsGetter.isExecuted() && !targetsGetter.isDisposed() && |
| 282 | (targetsGetter.getActualType() == XAtom.XA_ATOM || |
| 283 | targetsGetter.getActualType() == XDataTransferer.TARGETS_ATOM.getAtom()) && |
| 284 | targetsGetter.getActualFormat() == 32) { |
| 285 | |
| 286 | int count = (int)targetsGetter.getNumberOfItems(); |
| 287 | if (count > 0) { |
| 288 | long atoms = targetsGetter.getData(); |
| 289 | formats = new long[count]; |
| 290 | for (int index = 0; index < count; index++) { |
| 291 | formats[index] = |
| 292 | Native.getLong(atoms+index*XAtom.getAtomSize()); |
| 293 | } |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | return formats != null ? formats : new long[0]; |
| 298 | } |
| 299 | |
| 300 | // checkChange() will be called on SelectionNotify |
| 301 | void getTargetsDelayed() { |
| 302 | XToolkit.awtLock(); |
| 303 | try { |
| 304 | long curTime = System.currentTimeMillis(); |
| 305 | if (isSelectionNotifyProcessed || curTime >= convertSelectionTime + SELECTION_TIMEOUT) { |
| 306 | convertSelectionTime = curTime; |
| 307 | XlibWrapper.XConvertSelection(XToolkit.getDisplay(), |
| 308 | getSelectionAtom().getAtom(), |
| 309 | XDataTransferer.TARGETS_ATOM.getAtom(), |
| 310 | targetsPropertyAtom.getAtom(), |
| 311 | XWindow.getXAWTRootWindow().getWindow(), |
| 312 | XlibWrapper.CurrentTime); |
| 313 | isSelectionNotifyProcessed = false; |
| 314 | } |
| 315 | } finally { |
| 316 | XToolkit.awtUnlock(); |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /* |
| 321 | * Requests the selection data in the specified format and returns |
| 322 | * the data provided by the owner. |
| 323 | */ |
| 324 | public byte[] getData(long format, long time) throws IOException { |
| 325 | if (XToolkit.isToolkitThread()) { |
| 326 | throw new Error("UNIMPLEMENTED"); |
| 327 | } |
| 328 | |
| 329 | byte[] data = null; |
| 330 | |
| 331 | synchronized (lock) { |
| 332 | SELECTION_TIMEOUT = UNIXToolkit.getDatatransferTimeout(); |
| 333 | |
| 334 | WindowPropertyGetter dataGetter = |
| 335 | new WindowPropertyGetter(XWindow.getXAWTRootWindow().getWindow(), |
| 336 | selectionPropertyAtom, 0, MAX_LENGTH, |
| 337 | false, // don't delete to handle INCR properly. |
| 338 | XlibWrapper.AnyPropertyType); |
| 339 | |
| 340 | try { |
| 341 | XToolkit.awtLock(); |
| 342 | try { |
| 343 | propertyGetter = dataGetter; |
| 344 | lastRequestServerTime = time; |
| 345 | |
| 346 | XlibWrapper.XConvertSelection(XToolkit.getDisplay(), |
| 347 | getSelectionAtom().getAtom(), |
| 348 | format, |
| 349 | selectionPropertyAtom.getAtom(), |
| 350 | XWindow.getXAWTRootWindow().getWindow(), |
| 351 | time); |
| 352 | |
| 353 | // If the owner doesn't respond within the |
| 354 | // SELECTION_TIMEOUT, we report conversion failure. |
| 355 | try { |
| 356 | waitForSelectionNotify(dataGetter); |
| 357 | } catch (InterruptedException ie) { |
| 358 | return new byte[0]; |
| 359 | } finally { |
| 360 | propertyGetter = null; |
| 361 | } |
| 362 | } finally { |
| 363 | XToolkit.awtUnlock(); |
| 364 | } |
| 365 | if (!dataGetter.isExecuted()) { |
| 366 | throw new IOException("Owner timed out"); |
| 367 | } |
| 368 | |
| 369 | if (dataGetter.isDisposed()) { |
| 370 | throw new IOException("Owner failed to convert data"); |
| 371 | } |
| 372 | |
| 373 | // Handle incremental transfer. |
| 374 | if (dataGetter.getActualType() == |
| 375 | XDataTransferer.INCR_ATOM.getAtom()) { |
| 376 | |
| 377 | if (dataGetter.getActualFormat() != 32) { |
| 378 | throw new IOException("Unsupported INCR format: " + |
| 379 | dataGetter.getActualFormat()); |
| 380 | } |
| 381 | |
| 382 | int count = (int)dataGetter.getNumberOfItems(); |
| 383 | |
| 384 | if (count <= 0) { |
| 385 | throw new IOException("INCR data is missed."); |
| 386 | } |
| 387 | |
| 388 | long ptr = dataGetter.getData(); |
| 389 | |
| 390 | int len = 0; |
| 391 | |
| 392 | { |
| 393 | // Following Xt sources use the last element. |
| 394 | long longLength = Native.getLong(ptr, count-1); |
| 395 | |
| 396 | if (longLength <= 0) { |
| 397 | return new byte[0]; |
| 398 | } |
| 399 | |
| 400 | if (longLength > Integer.MAX_VALUE) { |
| 401 | throw new IOException("Can't handle large data block: " |
| 402 | + longLength + " bytes"); |
| 403 | } |
| 404 | |
| 405 | len = (int)longLength; |
| 406 | } |
| 407 | |
| 408 | dataGetter.dispose(); |
| 409 | |
| 410 | ByteArrayOutputStream dataStream = new ByteArrayOutputStream(len); |
| 411 | |
| 412 | while (true) { |
| 413 | WindowPropertyGetter incrDataGetter = |
| 414 | new WindowPropertyGetter(XWindow.getXAWTRootWindow().getWindow(), |
| 415 | selectionPropertyAtom, |
| 416 | 0, MAX_LENGTH, false, |
| 417 | XlibWrapper.AnyPropertyType); |
| 418 | |
| 419 | try { |
| 420 | XToolkit.awtLock(); |
| 421 | XToolkit.addEventDispatcher(XWindow.getXAWTRootWindow().getWindow(), |
| 422 | incrementalTransferHandler); |
| 423 | |
| 424 | propertyGetter = incrDataGetter; |
| 425 | |
| 426 | try { |
| 427 | XlibWrapper.XDeleteProperty(XToolkit.getDisplay(), |
| 428 | XWindow.getXAWTRootWindow().getWindow(), |
| 429 | selectionPropertyAtom.getAtom()); |
| 430 | |
| 431 | // If the owner doesn't respond within the |
| 432 | // SELECTION_TIMEOUT, we terminate incremental |
| 433 | // transfer. |
| 434 | waitForSelectionNotify(incrDataGetter); |
| 435 | } catch (InterruptedException ie) { |
| 436 | break; |
| 437 | } finally { |
| 438 | propertyGetter = null; |
| 439 | XToolkit.removeEventDispatcher(XWindow.getXAWTRootWindow().getWindow(), |
| 440 | incrementalTransferHandler); |
| 441 | XToolkit.awtUnlock(); |
| 442 | } |
| 443 | |
| 444 | // The owner didn't respond - terminate the transfer. |
| 445 | if (!incrDataGetter.isExecuted()) { |
| 446 | throw new IOException("Owner timed out"); |
| 447 | } |
| 448 | |
| 449 | if (incrDataGetter.isDisposed()) { |
| 450 | throw new IOException("Owner failed to convert data"); |
| 451 | } |
| 452 | |
| 453 | if (incrDataGetter.getActualFormat() != 8) { |
| 454 | throw new IOException("Unsupported data format: " + |
| 455 | incrDataGetter.getActualFormat()); |
| 456 | } |
| 457 | |
| 458 | count = (int)incrDataGetter.getNumberOfItems(); |
| 459 | |
| 460 | if (count == 0) { |
| 461 | break; |
| 462 | } |
| 463 | |
| 464 | if (count > 0) { |
| 465 | ptr = incrDataGetter.getData(); |
| 466 | for (int index = 0; index < count; index++) { |
| 467 | dataStream.write(Native.getByte(ptr + index)); |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | data = dataStream.toByteArray(); |
| 472 | |
| 473 | } finally { |
| 474 | incrDataGetter.dispose(); |
| 475 | } |
| 476 | } |
| 477 | } else { |
| 478 | XToolkit.awtLock(); |
| 479 | try { |
| 480 | XlibWrapper.XDeleteProperty(XToolkit.getDisplay(), |
| 481 | XWindow.getXAWTRootWindow().getWindow(), |
| 482 | selectionPropertyAtom.getAtom()); |
| 483 | } finally { |
| 484 | XToolkit.awtUnlock(); |
| 485 | } |
| 486 | |
| 487 | if (dataGetter.getActualFormat() != 8) { |
| 488 | throw new IOException("Unsupported data format: " + |
| 489 | dataGetter.getActualFormat()); |
| 490 | } |
| 491 | |
| 492 | int count = (int)dataGetter.getNumberOfItems(); |
| 493 | if (count > 0) { |
| 494 | data = new byte[count]; |
| 495 | long ptr = dataGetter.getData(); |
| 496 | for (int index = 0; index < count; index++) { |
| 497 | data[index] = Native.getByte(ptr + index); |
| 498 | } |
| 499 | } |
| 500 | } |
| 501 | } finally { |
| 502 | dataGetter.dispose(); |
| 503 | } |
| 504 | } |
| 505 | |
| 506 | return data != null ? data : new byte[0]; |
| 507 | } |
| 508 | |
| 509 | // To be MT-safe this method should be called under awtLock. |
| 510 | boolean isOwner() { |
| 511 | return isOwner; |
| 512 | } |
| 513 | |
| 514 | public void lostOwnership() { |
| 515 | isOwner = false; |
| 516 | if (clipboard != null) { |
| 517 | clipboard.run(); |
| 518 | } |
| 519 | } |
| 520 | |
| 521 | public synchronized void reset() { |
| 522 | contents = null; |
| 523 | formatMap = null; |
| 524 | formats = null; |
| 525 | appContext = null; |
| 526 | ownershipTime = 0; |
| 527 | } |
| 528 | |
| 529 | // Converts the data to the 'format' and if the conversion succeeded stores |
| 530 | // the data in the 'property' on the 'requestor' window. |
| 531 | // Returns true if the conversion succeeded. |
| 532 | private boolean convertAndStore(long requestor, long format, long property) { |
| 533 | int dataFormat = 8; /* Can choose between 8,16,32. */ |
| 534 | byte[] byteData = null; |
| 535 | long nativeDataPtr = 0; |
| 536 | int count = 0; |
| 537 | |
| 538 | try { |
| 539 | SunToolkit.insertTargetMapping(this, appContext); |
| 540 | |
| 541 | byteData = DataTransferer.getInstance().convertData(this, |
| 542 | contents, |
| 543 | format, |
| 544 | formatMap, |
| 545 | XToolkit.isToolkitThread()); |
| 546 | } catch (IOException ioe) { |
| 547 | return false; |
| 548 | } |
| 549 | |
| 550 | if (byteData == null) { |
| 551 | return false; |
| 552 | } |
| 553 | |
| 554 | count = byteData.length; |
| 555 | |
| 556 | try { |
| 557 | if (count > 0) { |
| 558 | if (count <= MAX_PROPERTY_SIZE) { |
| 559 | nativeDataPtr = Native.toData(byteData); |
| 560 | } else { |
| 561 | // Initiate incremental data transfer. |
| 562 | new IncrementalDataProvider(requestor, property, format, 8, |
| 563 | byteData); |
| 564 | |
| 565 | nativeDataPtr = |
| 566 | XlibWrapper.unsafe.allocateMemory(XAtom.getAtomSize()); |
| 567 | |
| 568 | Native.putLong(nativeDataPtr, (long)count); |
| 569 | |
| 570 | format = XDataTransferer.INCR_ATOM.getAtom(); |
| 571 | dataFormat = 32; |
| 572 | count = 1; |
| 573 | } |
| 574 | |
| 575 | } |
| 576 | |
| 577 | XToolkit.awtLock(); |
| 578 | try { |
| 579 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), requestor, property, |
| 580 | format, dataFormat, |
| 581 | XlibWrapper.PropModeReplace, |
| 582 | nativeDataPtr, count); |
| 583 | } finally { |
| 584 | XToolkit.awtUnlock(); |
| 585 | } |
| 586 | } finally { |
| 587 | if (nativeDataPtr != 0) { |
| 588 | XlibWrapper.unsafe.freeMemory(nativeDataPtr); |
| 589 | nativeDataPtr = 0; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | return true; |
| 594 | } |
| 595 | |
| 596 | private void handleSelectionRequest(XSelectionRequestEvent xsre) { |
| 597 | long property = xsre.get_property(); |
| 598 | long requestor = xsre.get_requestor(); |
| 599 | long requestTime = xsre.get_time(); |
| 600 | long format = xsre.get_target(); |
| 601 | int dataFormat = 0; |
| 602 | boolean conversionSucceeded = false; |
| 603 | |
| 604 | if (ownershipTime != 0 && |
| 605 | (requestTime == XlibWrapper.CurrentTime || |
| 606 | requestTime >= ownershipTime)) { |
| 607 | |
| 608 | property = xsre.get_property(); |
| 609 | |
| 610 | // Handle MULTIPLE requests as per ICCCM. |
| 611 | if (format == XDataTransferer.MULTIPLE_ATOM.getAtom()) { |
| 612 | // The property cannot be 0 for a MULTIPLE request. |
| 613 | if (property != 0) { |
| 614 | // First retrieve the list of requested targets. |
| 615 | WindowPropertyGetter wpg = |
| 616 | new WindowPropertyGetter(requestor, XAtom.get(property), 0, |
| 617 | MAX_LENGTH, false, |
| 618 | XlibWrapper.AnyPropertyType); |
| 619 | try { |
| 620 | wpg.execute(); |
| 621 | |
| 622 | if (wpg.getActualFormat() == 32 && |
| 623 | (wpg.getNumberOfItems() % 2) == 0) { |
| 624 | long count = wpg.getNumberOfItems() / 2; |
| 625 | long pairsPtr = wpg.getData(); |
| 626 | boolean writeBack = false; |
| 627 | for (int i = 0; i < count; i++) { |
| 628 | long target = Native.getLong(pairsPtr, 2*i); |
| 629 | long prop = Native.getLong(pairsPtr, 2*i + 1); |
| 630 | |
| 631 | if (!convertAndStore(requestor, target, prop)) { |
| 632 | // To report failure, we should replace the |
| 633 | // target atom with 0 in the MULTIPLE property. |
| 634 | Native.putLong(pairsPtr, 2*i, 0); |
| 635 | writeBack = true; |
| 636 | } |
| 637 | } |
| 638 | if (writeBack) { |
| 639 | XToolkit.awtLock(); |
| 640 | try { |
| 641 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), requestor, |
| 642 | property, |
| 643 | wpg.getActualType(), |
| 644 | wpg.getActualFormat(), |
| 645 | XlibWrapper.PropModeReplace, |
| 646 | wpg.getData(), |
| 647 | wpg.getNumberOfItems()); |
| 648 | } finally { |
| 649 | XToolkit.awtUnlock(); |
| 650 | } |
| 651 | } |
| 652 | conversionSucceeded = true; |
| 653 | } |
| 654 | } finally { |
| 655 | wpg.dispose(); |
| 656 | } |
| 657 | } |
| 658 | } else { |
| 659 | |
| 660 | // Support for obsolete clients as per ICCCM. |
| 661 | if (property == 0) { |
| 662 | property = format; |
| 663 | } |
| 664 | |
| 665 | if (format == XDataTransferer.TARGETS_ATOM.getAtom()) { |
| 666 | long nativeDataPtr = 0; |
| 667 | int count = 0; |
| 668 | dataFormat = 32; |
| 669 | |
| 670 | // Use a local copy to avoid synchronization. |
| 671 | long[] formatsLocal = formats; |
| 672 | |
| 673 | if (formatsLocal == null) { |
| 674 | throw new IllegalStateException("Not an owner."); |
| 675 | } |
| 676 | |
| 677 | count = formatsLocal.length; |
| 678 | |
| 679 | try { |
| 680 | if (count > 0) { |
| 681 | nativeDataPtr = Native.allocateLongArray(count); |
| 682 | Native.put(nativeDataPtr, formatsLocal); |
| 683 | } |
| 684 | |
| 685 | conversionSucceeded = true; |
| 686 | |
| 687 | XToolkit.awtLock(); |
| 688 | try { |
| 689 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), requestor, |
| 690 | property, format, dataFormat, |
| 691 | XlibWrapper.PropModeReplace, |
| 692 | nativeDataPtr, count); |
| 693 | } finally { |
| 694 | XToolkit.awtUnlock(); |
| 695 | } |
| 696 | } finally { |
| 697 | if (nativeDataPtr != 0) { |
| 698 | XlibWrapper.unsafe.freeMemory(nativeDataPtr); |
| 699 | nativeDataPtr = 0; |
| 700 | } |
| 701 | } |
| 702 | } else { |
| 703 | conversionSucceeded = convertAndStore(requestor, format, |
| 704 | property); |
| 705 | } |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | if (!conversionSucceeded) { |
| 710 | // Zero property indicates conversion failure. |
| 711 | property = 0; |
| 712 | } |
| 713 | |
| 714 | XSelectionEvent xse = new XSelectionEvent(); |
| 715 | try { |
| 716 | xse.set_type((int)XlibWrapper.SelectionNotify); |
| 717 | xse.set_send_event(true); |
| 718 | xse.set_requestor(requestor); |
| 719 | xse.set_selection(selectionAtom.getAtom()); |
| 720 | xse.set_target(format); |
| 721 | xse.set_property(property); |
| 722 | xse.set_time(requestTime); |
| 723 | |
| 724 | XToolkit.awtLock(); |
| 725 | try { |
| 726 | XlibWrapper.XSendEvent(XToolkit.getDisplay(), requestor, false, |
| 727 | XlibWrapper.NoEventMask, xse.pData); |
| 728 | } finally { |
| 729 | XToolkit.awtUnlock(); |
| 730 | } |
| 731 | } finally { |
| 732 | xse.dispose(); |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | private static void checkChange(XSelectionEvent xse) { |
| 737 | if (targetsPropertyAtoms == null || targetsPropertyAtoms.isEmpty()) { |
| 738 | // We are not tracking changes. |
| 739 | return; |
| 740 | } |
| 741 | |
| 742 | long propertyAtom = xse.get_property(); |
| 743 | long[] formats = null; |
| 744 | |
| 745 | if (propertyAtom == XlibWrapper.None) { |
| 746 | // We threat None property atom as "empty selection". |
| 747 | formats = new long[0]; |
| 748 | } else if (!targetsPropertyAtoms.contains(Long.valueOf(propertyAtom))) { |
| 749 | return; |
| 750 | } else { |
| 751 | WindowPropertyGetter targetsGetter = |
| 752 | new WindowPropertyGetter(XWindow.getXAWTRootWindow().getWindow(), |
| 753 | XAtom.get(propertyAtom), 0, MAX_LENGTH, |
| 754 | true, XlibWrapper.AnyPropertyType); |
| 755 | try { |
| 756 | targetsGetter.execute(); |
| 757 | formats = getFormats(targetsGetter); |
| 758 | } finally { |
| 759 | targetsGetter.dispose(); |
| 760 | } |
| 761 | } |
| 762 | |
| 763 | XAtom selectionAtom = XAtom.get(xse.get_selection()); |
| 764 | XSelection selection = getSelection(selectionAtom); |
| 765 | if (selection != null) { |
| 766 | selection.isSelectionNotifyProcessed = true; |
| 767 | if (selection.clipboard != null) { |
| 768 | selection.clipboard.checkChange(formats); |
| 769 | } |
| 770 | } |
| 771 | } |
| 772 | |
| 773 | private static class SelectionEventHandler implements XEventDispatcher { |
| 774 | public void dispatchEvent(XEvent ev) { |
| 775 | switch (ev.get_type()) { |
| 776 | case XlibWrapper.SelectionNotify: { |
| 777 | XSelectionEvent xse = ev.get_xselection(); |
| 778 | checkChange(xse); |
| 779 | XToolkit.awtLock(); |
| 780 | try { |
| 781 | // Ignore the SelectionNotify event if it is not the response to our last request. |
| 782 | if (propertyGetter != null && xse.get_time() == lastRequestServerTime) { |
| 783 | // The property will be None in case of convertion failure. |
| 784 | if (xse.get_property() == selectionPropertyAtom.getAtom()) { |
| 785 | propertyGetter.execute(); |
| 786 | propertyGetter = null; |
| 787 | } else if (xse.get_property() == 0) { |
| 788 | propertyGetter.dispose(); |
| 789 | propertyGetter = null; |
| 790 | } |
| 791 | } |
| 792 | XToolkit.awtLockNotifyAll(); |
| 793 | } finally { |
| 794 | XToolkit.awtUnlock(); |
| 795 | } |
| 796 | break; |
| 797 | } |
| 798 | case XlibWrapper.SelectionRequest: { |
| 799 | XSelectionRequestEvent xsre = ev.get_xselectionrequest(); |
| 800 | long atom = xsre.get_selection(); |
| 801 | XSelection selection = XSelection.getSelection(XAtom.get(atom)); |
| 802 | |
| 803 | if (selection != null) { |
| 804 | selection.handleSelectionRequest(xsre); |
| 805 | } |
| 806 | break; |
| 807 | } |
| 808 | case XlibWrapper.SelectionClear: { |
| 809 | XSelectionClearEvent xsce = ev.get_xselectionclear(); |
| 810 | long atom = xsce.get_selection(); |
| 811 | XSelection selection = XSelection.getSelection(XAtom.get(atom)); |
| 812 | |
| 813 | if (selection != null) { |
| 814 | selection.lostOwnership(); |
| 815 | } |
| 816 | |
| 817 | XToolkit.awtLock(); |
| 818 | try { |
| 819 | XToolkit.awtLockNotifyAll(); |
| 820 | } finally { |
| 821 | XToolkit.awtUnlock(); |
| 822 | } |
| 823 | break; |
| 824 | } |
| 825 | } |
| 826 | } |
| 827 | }; |
| 828 | |
| 829 | private static class IncrementalDataProvider implements XEventDispatcher { |
| 830 | private final long requestor; |
| 831 | private final long property; |
| 832 | private final long target; |
| 833 | private final int format; |
| 834 | private final byte[] data; |
| 835 | private int offset = 0; |
| 836 | |
| 837 | // NOTE: formats other than 8 are not supported. |
| 838 | public IncrementalDataProvider(long requestor, long property, |
| 839 | long target, int format, byte[] data) { |
| 840 | if (format != 8) { |
| 841 | throw new IllegalArgumentException("Unsupported format: " + format); |
| 842 | } |
| 843 | |
| 844 | this.requestor = requestor; |
| 845 | this.property = property; |
| 846 | this.target = target; |
| 847 | this.format = format; |
| 848 | this.data = data; |
| 849 | |
| 850 | XWindowAttributes wattr = new XWindowAttributes(); |
| 851 | try { |
| 852 | XToolkit.awtLock(); |
| 853 | try { |
| 854 | XlibWrapper.XGetWindowAttributes(XToolkit.getDisplay(), requestor, |
| 855 | wattr.pData); |
| 856 | XlibWrapper.XSelectInput(XToolkit.getDisplay(), requestor, |
| 857 | wattr.get_your_event_mask() | |
| 858 | XlibWrapper.PropertyChangeMask); |
| 859 | } finally { |
| 860 | XToolkit.awtUnlock(); |
| 861 | } |
| 862 | } finally { |
| 863 | wattr.dispose(); |
| 864 | } |
| 865 | XToolkit.addEventDispatcher(requestor, this); |
| 866 | } |
| 867 | |
| 868 | public void dispatchEvent(XEvent ev) { |
| 869 | switch (ev.get_type()) { |
| 870 | case XlibWrapper.PropertyNotify: |
| 871 | XPropertyEvent xpe = ev.get_xproperty(); |
| 872 | if (xpe.get_window() == requestor && |
| 873 | xpe.get_state() == XlibWrapper.PropertyDelete && |
| 874 | xpe.get_atom() == property) { |
| 875 | |
| 876 | int count = data.length - offset; |
| 877 | long nativeDataPtr = 0; |
| 878 | if (count > MAX_PROPERTY_SIZE) { |
| 879 | count = MAX_PROPERTY_SIZE; |
| 880 | } |
| 881 | |
| 882 | if (count > 0) { |
| 883 | nativeDataPtr = XlibWrapper.unsafe.allocateMemory(count); |
| 884 | for (int i = 0; i < count; i++) { |
| 885 | Native.putByte(nativeDataPtr+i, data[offset + i]); |
| 886 | } |
| 887 | } else { |
| 888 | assert (count == 0); |
| 889 | // All data has been transferred. |
| 890 | // This zero-length data indicates end of transfer. |
| 891 | XToolkit.removeEventDispatcher(requestor, this); |
| 892 | } |
| 893 | |
| 894 | XToolkit.awtLock(); |
| 895 | try { |
| 896 | XlibWrapper.XChangeProperty(XToolkit.getDisplay(), |
| 897 | requestor, property, |
| 898 | target, format, |
| 899 | XlibWrapper.PropModeReplace, |
| 900 | nativeDataPtr, count); |
| 901 | } finally { |
| 902 | XToolkit.awtUnlock(); |
| 903 | } |
| 904 | if (nativeDataPtr != 0) { |
| 905 | XlibWrapper.unsafe.freeMemory(nativeDataPtr); |
| 906 | nativeDataPtr = 0; |
| 907 | } |
| 908 | |
| 909 | offset += count; |
| 910 | } |
| 911 | } |
| 912 | } |
| 913 | } |
| 914 | |
| 915 | private static class IncrementalTransferHandler implements XEventDispatcher { |
| 916 | public void dispatchEvent(XEvent ev) { |
| 917 | switch (ev.get_type()) { |
| 918 | case XlibWrapper.PropertyNotify: |
| 919 | XPropertyEvent xpe = ev.get_xproperty(); |
| 920 | if (xpe.get_state() == XlibWrapper.PropertyNewValue && |
| 921 | xpe.get_atom() == selectionPropertyAtom.getAtom()) { |
| 922 | XToolkit.awtLock(); |
| 923 | try { |
| 924 | if (propertyGetter != null) { |
| 925 | propertyGetter.execute(); |
| 926 | propertyGetter = null; |
| 927 | } |
| 928 | XToolkit.awtLockNotifyAll(); |
| 929 | } finally { |
| 930 | XToolkit.awtUnlock(); |
| 931 | } |
| 932 | } |
| 933 | break; |
| 934 | } |
| 935 | } |
| 936 | }; |
| 937 | } |