aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/programs/Xserver/hw/nxagent/X/NXproperty.c
blob: 3d08a322838e2a71073049a9ffc89c03fc2f7419 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
/**************************************************************************/
/*                                                                        */
/* Copyright (c) 2001, 2007 NoMachine, http://www.nomachine.com/.         */
/*                                                                        */
/* NXAGENT, NX protocol compression and NX extensions to this software    */
/* are copyright of NoMachine. Redistribution and use of the present      */
/* software is allowed according to terms specified in the file LICENSE   */
/* which comes in the source distribution.                                */
/*                                                                        */
/* Check http://www.nomachine.com/licensing.html for applicability.       */
/*                                                                        */
/* NX and NoMachine are trademarks of NoMachine S.r.l.                    */
/*                                                                        */
/* All rights reserved.                                                   */
/*                                                                        */
/**************************************************************************/

/* $XFree86: xc/programs/Xserver/dix/property.c,v 3.12 2002/02/19 11:09:22 alanh Exp $ */
/***********************************************************

Copyright 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.


Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its 
documentation for any purpose and without fee is hereby granted, 
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in 
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.  

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
SOFTWARE.

******************************************************************/
/* $Xorg: property.c,v 1.4 2001/02/09 02:04:40 xorgcvs Exp $ */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <X11/X.h>
#define NEED_REPLIES
#define NEED_EVENTS
#include <X11/Xproto.h>
#include "windowstr.h"
#include "propertyst.h"
#include "dixstruct.h"
#include "../../dix/dispatch.h"
#include "swaprep.h"
#ifdef XCSECURITY
#define _SECURITY_SERVER
#include <X11/extensions/security.h>
#endif
#ifdef LBX
#include "lbxserve.h"
#include "lbxtags.h"
#endif

#include "Options.h"
#include "Rootless.h"
#include "Client.h"

#if defined(LBX) || defined(LBX_COMPAT)
#if 0 /* no header in X11 environment, not used in X11 environment */
int fWriteToClient(ClientPtr client, int len, char *buf)
{
    return WriteToClient(client, len, buf);
}
#endif
#endif

/*****************************************************************
 * Property Stuff
 *
 *    ChangeProperty, DeleteProperty, GetProperties,
 *    ListProperties
 *
 *   Properties below to windows.  A allocate slots each time
 *   a property is added.  No fancy searching done.
 *
 *****************************************************************/

#ifdef notdef
static void
PrintPropertys(WindowPtr pWin)
{
    PropertyPtr pProp;
    register int j;

    pProp = pWin->userProps;
    while (pProp)
    {
        ErrorF(  "%x %x\n", pProp->propertyName, pProp->type);
        ErrorF("property format: %d\n", pProp->format);
        ErrorF("property data: \n");
        for (j=0; j<(pProp->format/8)*pProp->size; j++)
           ErrorF("%c\n", pProp->data[j]);
        pProp = pProp->next;
    }
}
#endif

int
ProcRotateProperties(ClientPtr client)
{
    int     i, j, delta;
    REQUEST(xRotatePropertiesReq);
    WindowPtr pWin;
    register    Atom * atoms;
    PropertyPtr * props;               /* array of pointer */
    PropertyPtr pProp;
    xEvent event;

    REQUEST_FIXED_SIZE(xRotatePropertiesReq, stuff->nAtoms << 2);
    UpdateCurrentTime();
    pWin = (WindowPtr) SecurityLookupWindow(stuff->window, client,
					    SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    if (!stuff->nAtoms)
	return(Success);
    atoms = (Atom *) & stuff[1];
    props = (PropertyPtr *)ALLOCATE_LOCAL(stuff->nAtoms * sizeof(PropertyPtr));
    if (!props)
	return(BadAlloc);
    for (i = 0; i < stuff->nAtoms; i++)
    {
#ifdef XCSECURITY
	char action = SecurityCheckPropertyAccess(client, pWin, atoms[i],
				SecurityReadAccess|SecurityWriteAccess);
#endif
        if (!ValidAtom(atoms[i])
#ifdef XCSECURITY
	    || (SecurityErrorOperation == action)
#endif
	   )
        {
            DEALLOCATE_LOCAL(props);
	    client->errorValue = atoms[i];
            return BadAtom;
        }
#ifdef XCSECURITY
	if (SecurityIgnoreOperation == action)
        {
            DEALLOCATE_LOCAL(props);
	    return Success;
	}
#endif
        for (j = i + 1; j < stuff->nAtoms; j++)
            if (atoms[j] == atoms[i])
            {
                DEALLOCATE_LOCAL(props);
                return BadMatch;
            }
        pProp = wUserProps (pWin);
        while (pProp)
        {
            if (pProp->propertyName == atoms[i])
                goto found;
	    pProp = pProp->next;
        }
        DEALLOCATE_LOCAL(props);
        return BadMatch;
found: 
        props[i] = pProp;
    }
    delta = stuff->nPositions;

    /* If the rotation is a complete 360 degrees, then moving the properties
	around and generating PropertyNotify events should be skipped. */

    if ( (stuff->nAtoms != 0) && (abs(delta) % stuff->nAtoms) != 0 ) 
    {
	while (delta < 0)                  /* faster if abs value is small */
            delta += stuff->nAtoms;
    	for (i = 0; i < stuff->nAtoms; i++)
 	{
	    /* Generate a PropertyNotify event for each property whose value
		is changed in the order in which they appear in the request. */
 
 	    event.u.u.type = PropertyNotify;
            event.u.property.window = pWin->drawable.id;
    	    event.u.property.state = PropertyNewValue;
	    event.u.property.atom = props[i]->propertyName;	
	    event.u.property.time = currentTime.milliseconds;
	    DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
	
            props[i]->propertyName = atoms[(i + delta) % stuff->nAtoms];
	}
    }
    DEALLOCATE_LOCAL(props);
    return Success;
}

int 
ProcChangeProperty(ClientPtr client)
{	      
    WindowPtr pWin;
    char format, mode;
    unsigned long len;
    int sizeInBytes;
    int totalSize;
    int err;
    REQUEST(xChangePropertyReq);

    REQUEST_AT_LEAST_SIZE(xChangePropertyReq);
    UpdateCurrentTime();
    format = stuff->format;
    mode = stuff->mode;
    if ((mode != PropModeReplace) && (mode != PropModeAppend) &&
	(mode != PropModePrepend))
    {
	client->errorValue = mode;
	return BadValue;
    }
    if ((format != 8) && (format != 16) && (format != 32))
    {
	client->errorValue = format;
        return BadValue;
    }
    len = stuff->nUnits;
    if (len > ((0xffffffff - sizeof(xChangePropertyReq)) >> 2))
	return BadLength;
    sizeInBytes = format>>3;
    totalSize = len * sizeInBytes;
    REQUEST_FIXED_SIZE(xChangePropertyReq, totalSize);

#ifdef NXAGENT_CLIPBOARD
    {
       extern WindowPtr nxagentGetClipboardWindow(Atom, WindowPtr);

       pWin = nxagentGetClipboardWindow(stuff->property, NULL);
    }

    if (pWin == NULL)
#endif
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityWriteAccess);
    if (!pWin)
	return(BadWindow);
    if (!ValidAtom(stuff->property))
    {
	client->errorValue = stuff->property;
	return(BadAtom);
    }
    if (!ValidAtom(stuff->type))
    {
	client->errorValue = stuff->type;
	return(BadAtom);
    }

#ifdef XCSECURITY
    switch (SecurityCheckPropertyAccess(client, pWin, stuff->property,
					SecurityWriteAccess))
    {
	case SecurityErrorOperation:
	    client->errorValue = stuff->property;
	    return BadAtom;
	case SecurityIgnoreOperation:
	    return Success;
    }
#endif

#ifdef NXAGENT_ARTSD
    {
    /* Do not process MCOPGLOBALS property changes,
      they are already set reflecting the server side settings.
      Just return success.
    */
      extern Atom mcop_local_atom;
      if (stuff->property == mcop_local_atom)
        return client->noClientException;
    }
#endif

#ifdef LBX
    err = LbxChangeWindowProperty(client, pWin, stuff->property, stuff->type,
	 (int)format, (int)mode, len, TRUE, (pointer)&stuff[1], TRUE, NULL);
#else
    err = ChangeWindowProperty(pWin, stuff->property, stuff->type, (int)format,
			       (int)mode, len, (pointer)&stuff[1], TRUE);
#endif
    if (err != Success)
	return err;
    else
    {
      if (nxagentOption(Rootless) == 1)
      {
        nxagentExportProperty(pWin, stuff->property, stuff->type, (int) format,
                                  (int) mode, len, (pointer) &stuff[1]);
      }

      nxagentGuessClientHint(client, stuff->property, (char *) &stuff[1]);

      nxagentGuessShadowHint(client, stuff->property);

      return client->noClientException;
    }
}

int
ChangeWindowProperty(WindowPtr pWin, Atom property, Atom type, int format, 
                     int mode, unsigned long len, pointer value, 
                     Bool sendevent)
{
#ifdef LBX
    return LbxChangeWindowProperty(NULL, pWin, property, type,
				   format, mode, len, TRUE, value,
				   sendevent, NULL);
#else
    PropertyPtr pProp;
    xEvent event;
    int sizeInBytes;
    int totalSize;
    pointer data;

    sizeInBytes = format>>3;
    totalSize = len * sizeInBytes;

    /* first see if property already exists */

    pProp = wUserProps (pWin);
    while (pProp)
    {
	if (pProp->propertyName == property)
	    break;
	pProp = pProp->next;
    }
    if (!pProp)   /* just add to list */
    {
	if (!pWin->optional && !MakeWindowOptional (pWin))
	    return(BadAlloc);
        pProp = (PropertyPtr)xalloc(sizeof(PropertyRec));
	if (!pProp)
	    return(BadAlloc);
        data = (pointer)xalloc(totalSize);
	if (!data && len)
	{
	    xfree(pProp);
	    return(BadAlloc);
	}
        pProp->propertyName = property;
        pProp->type = type;
        pProp->format = format;
        pProp->data = data;
	if (len)
	    memmove((char *)data, (char *)value, totalSize);
	pProp->size = len;
        pProp->next = pWin->optional->userProps;
        pWin->optional->userProps = pProp;
    }
    else
    {
	/* To append or prepend to a property the request format and type
		must match those of the already defined property.  The
		existing format and type are irrelevant when using the mode
		"PropModeReplace" since they will be written over. */

        if ((format != pProp->format) && (mode != PropModeReplace))
	    return(BadMatch);
        if ((pProp->type != type) && (mode != PropModeReplace))
            return(BadMatch);
        if (mode == PropModeReplace)
        {
	    if (totalSize != pProp->size * (pProp->format >> 3))
	    {
	    	data = (pointer)xrealloc(pProp->data, totalSize);
	    	if (!data && len)
		    return(BadAlloc);
            	pProp->data = data;
	    }
	    if (len)
		memmove((char *)pProp->data, (char *)value, totalSize);
	    pProp->size = len;
    	    pProp->type = type;
	    pProp->format = format;
	}
	else if (len == 0)
	{
	    /* do nothing */
	}
        else if (mode == PropModeAppend)
        {
	    data = (pointer)xrealloc(pProp->data,
				     sizeInBytes * (len + pProp->size));
	    if (!data)
		return(BadAlloc);
            pProp->data = data;
	    memmove(&((char *)data)[pProp->size * sizeInBytes], 
		    (char *)value,
		  totalSize);
            pProp->size += len;
	}
        else if (mode == PropModePrepend)
        {
            data = (pointer)xalloc(sizeInBytes * (len + pProp->size));
	    if (!data)
		return(BadAlloc);
	    memmove(&((char *)data)[totalSize], (char *)pProp->data, 
		  (int)(pProp->size * sizeInBytes));
            memmove((char *)data, (char *)value, totalSize);
	    xfree(pProp->data);
            pProp->data = data;
            pProp->size += len;
	}
    }
    if (sendevent)
    {
	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->drawable.id;
	event.u.property.state = PropertyNewValue;
	event.u.property.atom = pProp->propertyName;
	event.u.property.time = currentTime.milliseconds;
	DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
    }
    return(Success);
#endif
}

int
DeleteProperty(WindowPtr pWin, Atom propName)
{
    PropertyPtr pProp, prevProp;
    xEvent event;

    if (!(pProp = wUserProps (pWin)))
	return(Success);
    prevProp = (PropertyPtr)NULL;
    while (pProp)
    {
	if (pProp->propertyName == propName)
	    break;
        prevProp = pProp;
	pProp = pProp->next;
    }
    if (pProp) 
    {		    
        if (prevProp == (PropertyPtr)NULL)      /* takes care of head */
        {
            if (!(pWin->optional->userProps = pProp->next))
		CheckWindowOptionalNeed (pWin);
        }
	else
        {
            prevProp->next = pProp->next;
        }
#ifdef LBX
	if (pProp->tag_id)
	    TagDeleteTag(pProp->tag_id);
#endif
	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->drawable.id;
	event.u.property.state = PropertyDelete;
        event.u.property.atom = pProp->propertyName;
	event.u.property.time = currentTime.milliseconds;
	DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
	xfree(pProp->data);
        xfree(pProp);
    }
    return(Success);
}

void
DeleteAllWindowProperties(WindowPtr pWin)
{
    PropertyPtr pProp, pNextProp;
    xEvent event;

    pProp = wUserProps (pWin);
    while (pProp)
    {
#ifdef LBX
	if (pProp->tag_id)
	    TagDeleteTag(pProp->tag_id);
#endif
	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->drawable.id;
	event.u.property.state = PropertyDelete;
	event.u.property.atom = pProp->propertyName;
	event.u.property.time = currentTime.milliseconds;
	DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
	pNextProp = pProp->next;
        xfree(pProp->data);
        xfree(pProp);
	pProp = pNextProp;
    }
}

static int
NullPropertyReply(
    ClientPtr client,
    ATOM propertyType,
    int format,
    xGetPropertyReply *reply)
{
    reply->nItems = 0;
    reply->length = 0;
    reply->bytesAfter = 0;
    reply->propertyType = propertyType;
    reply->format = format;
    WriteReplyToClient(client, sizeof(xGenericReply), reply);
    return(client->noClientException);
}

/*****************
 * GetProperty
 *    If type Any is specified, returns the property from the specified
 *    window regardless of its type.  If a type is specified, returns the
 *    property only if its type equals the specified type.
 *    If delete is True and a property is returned, the property is also
 *    deleted from the window and a PropertyNotify event is generated on the
 *    window.
 *****************/

int
ProcGetProperty(ClientPtr client)
{
    PropertyPtr pProp, prevProp;
    unsigned long n, len, ind;
    WindowPtr pWin;
    xGetPropertyReply reply;
    REQUEST(xGetPropertyReq);

    REQUEST_SIZE_MATCH(xGetPropertyReq);
    if (stuff->delete)
	UpdateCurrentTime();
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityReadAccess);
    if (!pWin)
	return BadWindow;

    if (!ValidAtom(stuff->property))
    {
	client->errorValue = stuff->property;
	return(BadAtom);
    }
    if ((stuff->delete != xTrue) && (stuff->delete != xFalse))
    {
	client->errorValue = stuff->delete;
	return(BadValue);
    }
    if ((stuff->type != AnyPropertyType) && !ValidAtom(stuff->type))
    {
	client->errorValue = stuff->type;
	return(BadAtom);
    }

    pProp = wUserProps (pWin);
    prevProp = (PropertyPtr)NULL;
    while (pProp)
    {
	if (pProp->propertyName == stuff->property) 
	    break;
	prevProp = pProp;
	pProp = pProp->next;
    }

    reply.type = X_Reply;
    reply.sequenceNumber = client->sequence;
    if (!pProp) 
	return NullPropertyReply(client, None, 0, &reply);

#ifdef XCSECURITY
    {
	Mask access_mode = SecurityReadAccess;

	if (stuff->delete)
	    access_mode |= SecurityDestroyAccess;
	switch(SecurityCheckPropertyAccess(client, pWin, stuff->property,
					   access_mode))
	{
	    case SecurityErrorOperation:
		client->errorValue = stuff->property;
		return BadAtom;;
	    case SecurityIgnoreOperation:
		return NullPropertyReply(client, pProp->type, pProp->format,
					 &reply);
	}
    }
#endif
    /* If the request type and actual type don't match. Return the
    property information, but not the data. */

    if (((stuff->type != pProp->type) &&
	 (stuff->type != AnyPropertyType))
       )
    {
	reply.bytesAfter = pProp->size;
	reply.format = pProp->format;
	reply.length = 0;
	reply.nItems = 0;
	reply.propertyType = pProp->type;
	WriteReplyToClient(client, sizeof(xGenericReply), &reply);
	return(Success);
    }
#ifdef LBX
    /* make sure we have the current value */                       
    if (pProp->tag_id && pProp->owner_pid) {
	LbxStallPropRequest(client, pProp);
	return client->noClientException;
    }                                              
#endif

/*
 *  Return type, format, value to client
 */
    n = (pProp->format/8) * pProp->size; /* size (bytes) of prop */
    ind = stuff->longOffset << 2;        

   /* If longOffset is invalid such that it causes "len" to
	    be negative, it's a value error. */

    if (n < ind)
    {
	client->errorValue = stuff->longOffset;
	return BadValue;
    }

    len = min(n - ind, 4 * stuff->longLength);

    reply.bytesAfter = n - (ind + len);
    reply.format = pProp->format;
    reply.length = (len + 3) >> 2;
    reply.nItems = len / (pProp->format / 8 );
    reply.propertyType = pProp->type;

    if (stuff->delete && (reply.bytesAfter == 0))
    { /* send the event */
	xEvent event;

	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->drawable.id;
	event.u.property.state = PropertyDelete;
	event.u.property.atom = pProp->propertyName;
	event.u.property.time = currentTime.milliseconds;
	DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
    }

    WriteReplyToClient(client, sizeof(xGenericReply), &reply);
    if (len)
    {
	switch (reply.format) {
	case 32: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap32Write; break;
	case 16: client->pSwapReplyFunc = (ReplySwapPtr)CopySwap16Write; break;
	default: client->pSwapReplyFunc = (ReplySwapPtr)WriteToClient; break;
	}
	WriteSwappedDataToClient(client, len,
				 (char *)pProp->data + ind);
    }

    if (stuff->delete && (reply.bytesAfter == 0))
    { /* delete the Property */
#ifdef LBX
	if (pProp->tag_id)
	    TagDeleteTag(pProp->tag_id);
#endif
	if (prevProp == (PropertyPtr)NULL) /* takes care of head */
	{
	    if (!(pWin->optional->userProps = pProp->next))
		CheckWindowOptionalNeed (pWin);
	}
	else
	    prevProp->next = pProp->next;
	xfree(pProp->data);
	xfree(pProp);
    }
    return(client->noClientException);
}

#ifdef NXAGENT_CLIPBOARD
/* GetWindowProperty clipboard use only */
int
GetWindowProperty(pWin, property, longOffset, longLength, delete,
            type, actualType, format, nItems, bytesAfter, propData )
    WindowPtr	        pWin;
    Atom		property;
    long			longOffset;
    long			longLength;
    Bool			delete;
    Atom		type;
    Atom		*actualType;
    int			*format;
    unsigned long	*nItems;
    unsigned long	*bytesAfter;
    unsigned char	**propData;
{
    PropertyPtr pProp, prevProp;
    unsigned long n, len, ind;

    if (!pWin)
	return BadWindow;


    if (!ValidAtom(property))
    {
	return(BadAtom);
    }
    if ((type != AnyPropertyType) && !ValidAtom(type))
    {
	return(BadAtom);
    }

    pProp = wUserProps (pWin);
    prevProp = (PropertyPtr)NULL;

    while (pProp)
    {
	if (pProp->propertyName == property)
	    break;
	prevProp = pProp;
	pProp = pProp->next;
    }


    if (!pProp)
	return (BadAtom);

    /* If the request type and actual type don't match. Return the
    property information, but not the data. */

    if (((type != pProp->type) &&
	 (type != AnyPropertyType))
       )
    {
	*bytesAfter = pProp->size;
	*format = pProp->format;
	*nItems = 0;
	*actualType = pProp->type;
	return(Success);
    }

/*
 *  Return type, format, value to client
 */
    n = (pProp->format/8) * pProp->size; /* size (bytes) of prop */
    ind = longOffset << 2;

   /* If longOffset is invalid such that it causes "len" to
	    be negative, it's a value error. */

    if (n < ind)
    {
	return BadValue;
    }

    len = min(n - ind, 4 * longLength);

    *bytesAfter = n - (ind + len);
    *format = pProp->format;
    *nItems = len / (pProp->format / 8 );
    *actualType = pProp->type;

    if (delete && (*bytesAfter == 0))
    { /* send the event */
	xEvent event;

	event.u.u.type = PropertyNotify;
	event.u.property.window = pWin->drawable.id;
	event.u.property.state = PropertyDelete;
	event.u.property.atom = pProp->propertyName;
	event.u.property.time = currentTime.milliseconds;
	DeliverEvents(pWin, &event, 1, (WindowPtr)NULL);
    }

    if (len)
    {
	 *propData = (unsigned char *)(pProp->data) + ind;
    }

    if (delete && (*bytesAfter == 0))
    { /* delete the Property */
#ifdef LBX
	if (pProp->tag_id)
	    TagDeleteTag(pProp->tag_id);
#endif
	if (prevProp == (PropertyPtr)NULL) /* takes care of head */
	{
	    if (!(pWin->optional->userProps = pProp->next))
		CheckWindowOptionalNeed (pWin);
	}
	else
	    prevProp->next = pProp->next;
	xfree(pProp->data);
	xfree(pProp);
    }
    return(Success);
}
#endif

int
ProcListProperties(ClientPtr client)
{
    Atom *pAtoms = NULL, *temppAtoms;
    xListPropertiesReply xlpr;
    int	numProps = 0;
    WindowPtr pWin;
    PropertyPtr pProp;
    REQUEST(xResourceReq);

    REQUEST_SIZE_MATCH(xResourceReq);
    pWin = (WindowPtr)SecurityLookupWindow(stuff->id, client,
					   SecurityReadAccess);
    if (!pWin)
        return(BadWindow);

    pProp = wUserProps (pWin);
    while (pProp)
    {        
        pProp = pProp->next;
	numProps++;
    }
    if (numProps)
        if(!(pAtoms = (Atom *)ALLOCATE_LOCAL(numProps * sizeof(Atom))))
            return(BadAlloc);

    xlpr.type = X_Reply;
    xlpr.nProperties = numProps;
    xlpr.length = (numProps * sizeof(Atom)) >> 2;
    xlpr.sequenceNumber = client->sequence;
    pProp = wUserProps (pWin);
    temppAtoms = pAtoms;
    while (pProp)
    {
	*temppAtoms++ = pProp->propertyName;
	pProp = pProp->next;
    }
    WriteReplyToClient(client, sizeof(xGenericReply), &xlpr);
    if (numProps)
    {
        client->pSwapReplyFunc = (ReplySwapPtr)Swap32Write;
        WriteSwappedDataToClient(client, numProps * sizeof(Atom), pAtoms);
        DEALLOCATE_LOCAL(pAtoms);
    }
    return(client->noClientException);
}

int 
ProcDeleteProperty(register ClientPtr client)
{
    WindowPtr pWin;
    REQUEST(xDeletePropertyReq);
    int result;
              
    REQUEST_SIZE_MATCH(xDeletePropertyReq);
    UpdateCurrentTime();
    pWin = (WindowPtr)SecurityLookupWindow(stuff->window, client,
					   SecurityWriteAccess);
    if (!pWin)
        return(BadWindow);
    if (!ValidAtom(stuff->property))
    {
	client->errorValue = stuff->property;
	return (BadAtom);
    }

#ifdef XCSECURITY
    switch(SecurityCheckPropertyAccess(client, pWin, stuff->property,
				       SecurityDestroyAccess))
    {
	case SecurityErrorOperation:
	    client->errorValue = stuff->property;
	    return BadAtom;;
	case SecurityIgnoreOperation:
	    return Success;
    }
#endif

    result = DeleteProperty(pWin, stuff->property);
    if (client->noClientException != Success)
	return(client->noClientException);
    else
	return(result);
}