aboutsummaryrefslogtreecommitdiffstats
path: root/matchbox/core/xas.c
blob: 47329dcc33e7130211c5f260aebb8e8ec0ed28dc (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
905
906
/* Asynchronous Xlib hack utiltys lib
 *
 * Copyright (c) 2005 Matthew Allum
 *
 * Contains portions of code from Metacity and Xlib thus;
 *
 * Copyright (C) 2002 Havoc Pennington
 * Copyright (C) 1986, 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.
 */

#include "xas.h"

#if MBWM_WANT_DEBUG
#include "mb-wm-debug.h"
#include <stdio.h>
#define XAS_DBG(x, a...) \
if (mbwm_debug_flags & MBWM_DEBUG_XAS) \
 fprintf(stderr, __FILE__ ":%d,%s() " x "\n", __LINE__, __func__, ##a)
#else
#define XAS_DBG(x, a...) do {} while (0)
#endif
#define XAS_MARK() XAS_DBG("--mark--");

#ifdef MBWM_WANT_ASSERT
#include <assert.h>
#define XAS_ASSERT(x) assert(x)
#else
#define XAS_ASSERT(x) do {} while (0)
#endif

#define XAS_ALIGN_VALUE(this, boundary) \
  (( ((unsigned long)(this)) + (((unsigned long)(boundary)) -1)) & (~(((unsigned long)(boundary))-1)))

#define NEED_REPLIES
#include <X11/Xlibint.h>

#ifndef NULL
#define NULL ((void*)0)
#endif

typedef struct XasTask            XasTask;
typedef struct XasTaskGetProperty XasTaskGetProperty;
typedef struct XasTaskGetWinAttr  XasTaskGetWinAttr;
typedef struct XasTaskGetGeom     XasTaskGetGeom;

#define XAS_TASK(t) (XasTask*)(t)

typedef enum XasTaskType
{
  XAS_TASK_UNKNOWN,
  XAS_TASK_GET_PROPERTY,
  XAS_TASK_GET_WIN_ATTR,
  XAS_TASK_GET_GEOM,

} XasTaskType;

struct XasContext
{
  _XAsyncHandler async;
  Display       *xdpy;
  XasTask       *tasks_pending;
  int            n_tasks_pending;
  XasTask       *tasks_completed;
  int            n_tasks_completed;
};

struct XasTask
{
  XasTask       *next;
  XasTaskType    type;
  XasContext    *ctx;
  unsigned long  request_seq;
  Bool           have_reply;
  int            error;

};

struct XasTaskGetProperty
{
  XasTask        task;

  Window         window;
  Atom           property;

  Atom           actual_type;
  int            actual_format;

  unsigned long  n_items;
  unsigned long  bytes_after;
  unsigned char *data;
};

struct XasTaskGetWinAttr
{
  XasTask            task;
  Window             window;
  XasWindowAttributes *attr;
};

struct XasTaskGetGeom
{
  XasTask            task;
  Drawable           drw;
  Window             root;
  int                x;
  int                y;
  unsigned int       width;
  unsigned int       height;
  unsigned int       border;
  unsigned int       depth;
};

static XasTask*
task_list_append(XasTask *tasks, XasTask *task)
{
  XasTask *t = NULL;

  /* FIXME: use hash on seq_req key instead ? */

  if (tasks == NULL) return task;

  for (t = tasks; t->next != NULL; t = t->next);

  t->next = task;

  return tasks;
}

XasTask*
task_list_remove(XasTask *tasks, XasTask *task)
{
  XasTask *t = NULL, *p = NULL;

  if (task == tasks)
    {
      t = task->next;
      tasks->next = NULL;
      return t;
    }

  p = tasks;
  t = tasks->next;

  while (t != NULL)
    {
      if (t == task)
	{
	  p->next = t->next;
	  task->next = NULL;
	  return tasks;
	}
      p = t; t = t->next;
    }

  return tasks;
}

static void
task_init(XasContext *ctx, XasTask *task, XasTaskType type)
{
  task->ctx         = ctx;
  task->next        = NULL;
  task->type        = type;
  task->request_seq = ctx->xdpy->request;
  task->have_reply  = False;
}

static void
task_complete(XasContext *ctx, XasTask *task)
{
  ctx->tasks_pending = task_list_remove(ctx->tasks_pending, task);
  ctx->n_tasks_pending--;
  ctx->tasks_completed = task_list_append(ctx->tasks_completed, task);
  ctx->n_tasks_completed++;
}

static XasTask*
xas_find_task_for_request_seq(XasContext    *ctx,
			      XasTask       *task_list,
			      unsigned long  request_seq)
{
  XasTask *task = NULL;

  task = task_list;

  while (task != NULL)
    {
      if (task->request_seq == request_seq)
	return task;
      task = task->next;
    }

  XAS_DBG("Failed to find task\n");
  return NULL;
}

static Bool
xas_async_get_geom_handler (XasContext         *ctx,
			    XasTaskGetGeom  *task,
			    xReply             *rep,
			    char               *buf,
			    int                 len)
{
  Display                   *dpy;
  xGetGeometryReply         *repl;
  xGetGeometryReply          replbuf;

  dpy = ctx->xdpy;

  task->task.have_reply = True;

  task_complete (ctx, XAS_TASK(task));

  if (rep->generic.type == X_Error)
    {
      xError errbuf;
      task->task.error = rep->error.errorCode;
      _XGetAsyncReply (dpy, (char *)&errbuf, rep, buf, len,
                       (SIZEOF (xError) - SIZEOF (xReply)) >> 2,
                       False);
      return True;
    }

  repl = (xGetGeometryReply *)
    _XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,
		    (SIZEOF(xGetGeometryReply) - SIZEOF(xReply)) >> 2,
		    True);

  task->root   = repl->root;
  task->x      = cvtINT16toInt (repl->x);
  task->y      = cvtINT16toInt (repl->y);
  task->width  = repl->width;
  task->height = repl->height;
  task->border = repl->borderWidth;
  task->depth  = repl->depth;

  return True;
}


static Bool
xas_async_get_win_attr_handler (XasContext         *ctx,
				XasTaskGetWinAttr  *task,
				xReply             *rep,
				char               *buf,
				int                 len)
{
  Display                   *dpy;
  xGetWindowAttributesReply  replbuf;
  xGetWindowAttributesReply *repl;

  dpy = ctx->xdpy;

  task->task.have_reply = True;

  task_complete (ctx, XAS_TASK(task));

  if (rep->generic.type == X_Error)
    {
      xError errbuf;
      task->task.error = rep->error.errorCode;
      _XGetAsyncReply (dpy, (char *)&errbuf, rep, buf, len,
                       (SIZEOF (xError) - SIZEOF (xReply)) >> 2,
                       False);
      return True;
    }

  repl = (xGetWindowAttributesReply *)
    _XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len,
		    (SIZEOF(xGetWindowAttributesReply) - SIZEOF(xReply)) >> 2,
		    True);

  task->attr = (XasWindowAttributes *)Xmalloc(sizeof(XasWindowAttributes));

  if (task->attr == NULL)
    {
      task->task.error = BadAlloc;
      return True;
    }

  task->attr->class = repl->class;
  task->attr->bit_gravity = repl->bitGravity;
  task->attr->win_gravity = repl->winGravity;
  task->attr->backing_store = repl->backingStore;
  task->attr->backing_planes = repl->backingBitPlanes;
  task->attr->backing_pixel = repl->backingPixel;
  task->attr->save_under = repl->saveUnder;
  task->attr->colormap = repl->colormap;
  task->attr->map_installed = repl->mapInstalled;
  task->attr->map_state = repl->mapState;
  task->attr->all_event_masks = repl->allEventMasks;
  task->attr->your_event_mask = repl->yourEventMask;
  task->attr->do_not_propagate_mask = repl->doNotPropagateMask;
  task->attr->override_redirect = repl->override;
  task->attr->visual = _XVIDtoVisual (dpy, repl->visualID);

  return True;
}

static Bool
xas_async_get_property_handler (XasContext         *ctx,
				XasTaskGetProperty *task,
				xReply             *rep,
				char               *buf,
				int                 len)
{
  Display            *dpy;
  xGetPropertyReply  replbuf;
  xGetPropertyReply *reply;
  int                bytes_read;

  /* Code and comments here wripped out of Metacity, Copyright
   * Havoc Pennington.
   */

  /* FIXME: Really check this code is really reliable/safe.*/

  dpy = ctx->xdpy;

  XAS_DBG ("seeing request seq %ld buflen %d",
	   dpy->last_request_read, len);

  task_complete (ctx, XAS_TASK(task));

  /* read bytes so far */
  bytes_read = SIZEOF (xReply);

  if (rep->generic.type == X_Error)
    {
      xError errbuf;

      task->task.error = rep->error.errorCode;

      /* We return True (meaning we consumed the reply)
       * because otherwise it would invoke the X error handler,
       * and an async API is useless if you have to synchronously
       * trap X errors. Also GetProperty can always fail, pretty
       * much, so trapping errors is always what you want.
       *
       * We have to eat all the error reply data here.
       * (kind of a charade as we know sizeof(xError) == sizeof(xReply))
       *
       * Passing discard = True seems to break things; I don't understand
       * why, because there should be no extra data in an error reply,
       * right?
       */
      _XGetAsyncReply (dpy, (char *)&errbuf, rep, buf, len,
                       (SIZEOF (xError) - bytes_read) >> 2, /* 32-bit words */
                       False); /* really seems like it should be True */
      return True;
    }

  XAS_DBG ("already read %d bytes reading %d more for total of %d; generic.length = %ld",
	   bytes_read, (SIZEOF (xGetPropertyReply) - bytes_read) >> 2,
	   SIZEOF (xGetPropertyReply), rep->generic.length);

  reply = (xGetPropertyReply *)
    _XGetAsyncReply (dpy, (char *)&replbuf, rep, buf, len,
                     (SIZEOF (xGetPropertyReply) - bytes_read) >> 2,
                     False); /* False means expecting more data to follow,
                              * don't eat the rest of the reply
                              */

  bytes_read = SIZEOF (xGetPropertyReply);

  XAS_DBG ("have reply propertyType = %ld format = %d n_items = %ld",
	   reply->propertyType, reply->format, reply->nItems);

  /* This is all copied from XGetWindowProperty().  Not sure we should
   * LockDisplay(). Not sure I'm passing the right args to
   * XGetAsyncData(). Not sure about a lot of things.
   */

  /* LockDisplay (dpy); */

  if (reply->propertyType != None)
    {
      long nbytes, netbytes;

      /* this alignment macro from orbit2 */

      switch (reply->format)
        {
          /*
           * One extra byte is malloced than is needed to contain the property
           * data, but this last byte is null terminated and convenient for
           * returning string properties, so the client doesn't then have to
           * recopy the string to make it null terminated.
           */
        case 8:
          nbytes = reply->nItems;
          /* there's padding to word boundary */
          netbytes = XAS_ALIGN_VALUE (nbytes, 4);
          if (nbytes + 1 > 0 &&
              (task->data = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
            {

              XAS_DBG ("already read %d bytes using %ld, more eating %ld more",
		       bytes_read, nbytes, netbytes);

              /* _XReadPad (dpy, (char *) task->data, netbytes); */
              _XGetAsyncData (dpy, task->data, buf, len,
                              bytes_read, nbytes,
                              netbytes);
            }
          break;

        case 16:
          nbytes = reply->nItems * sizeof (short);
          netbytes = reply->nItems << 1;
          netbytes = XAS_ALIGN_VALUE (netbytes, 4); /* to word boundary */
          if (nbytes + 1 > 0 &&
              (task->data = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
            {
              XAS_DBG ("%s: already read %d bytes using %ld more, eating %ld more\n",
                      __FUNCTION__, bytes_read, nbytes, netbytes);

              /* _XRead16Pad (dpy, (short *) task->data, netbytes); */
              _XGetAsyncData (dpy, task->data, buf, len,
                              bytes_read, nbytes, netbytes);
            }
          break;

        case 32:
          /* NOTE buffer is in longs to match XGetWindowProperty() */
          nbytes = reply->nItems * sizeof (long);
          netbytes = reply->nItems << 2; /* wire size always 32 bits though */
          if (nbytes + 1 > 0 &&
              (task->data = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
            {
              XAS_DBG ("already read %d bytes using %ld more, eating %ld more",
		       bytes_read, nbytes, netbytes);

              /* We have to copy the XGetWindowProperty() crackrock
               * and get format 32 as long even on 64-bit platforms.
               */
              if (sizeof (long) == 8)
                {
                  unsigned char *netdata;
                  unsigned char *lptr;
                  unsigned char *end_lptr;

                  /* Store the 32-bit values in the end of the array */
                  netdata = task->data + nbytes / 2;

                  _XGetAsyncData (dpy, netdata, buf, len,
                                  bytes_read, netbytes,
                                  netbytes);

                  /* Now move the 32-bit values to the front */

                  lptr = task->data;
                  end_lptr = task->data + nbytes;
                  while (lptr != end_lptr)
                    {
                      *(long*) lptr = *(CARD32*) netdata;
                      lptr += sizeof (long);
                      netdata += sizeof (CARD32);
                    }
                }
              else
                {
                  /* Here the wire format matches our actual format */
                  _XGetAsyncData (dpy, task->data, buf, len,
                                  bytes_read, netbytes,
                                  netbytes);
                }
            }
          break;

        default:
          /*
           * This part of the code should never be reached.  If it is,
           * the server sent back a property with an invalid format.
           * This is a BadImplementation error.
           *
           * However this async GetProperty API doesn't report errors
           * via the standard X mechanism, so don't do anything about
           * it, other than store it in task->error.
           */
	  task->task.error = BadImplementation;
          nbytes = netbytes = 0L;
          break;
        }

      if (task->data == NULL)
        {
          task->task.error = BadAlloc;

          XAS_DBG ("already read %d bytes eating %ld", bytes_read, netbytes);

          /* _XEatData (dpy, (unsigned long) netbytes); */
          _XGetAsyncData (dpy, NULL, buf, len, bytes_read, 0, netbytes);

          /* UnlockDisplay (dpy); */
          return BadAlloc; /* not Success */
        }

      (task->data)[nbytes] = '\0';
    }

  XAS_DBG ("have data");

  task->actual_type = reply->propertyType;
  task->actual_format = reply->format;
  task->n_items = reply->nItems;
  task->bytes_after = reply->bytesAfter;

  /* UnlockDisplay (dpy); */

  return True;
}

static Bool
xas_async_handler (Display *dpy,
		   xReply  *rep,
		   char    *buf,
		   int      len,
		   XPointer data)
{
  XasContext *ctx = (XasContext *)data;
  XasTask    *task;

  XAS_ASSERT(ctx->xdpy == dpy);

  if (!ctx->tasks_pending)
    return False;

  task = xas_find_task_for_request_seq(ctx,
				       ctx->tasks_pending,
				       dpy->last_request_read);
  if (!task)
    return False;

  switch (task->type)
    {
    case XAS_TASK_GET_PROPERTY:
      return xas_async_get_property_handler (ctx,
					     (XasTaskGetProperty*)task,
					     rep, buf, len);
    case XAS_TASK_GET_WIN_ATTR:
      return xas_async_get_win_attr_handler (ctx,
					     (XasTaskGetWinAttr*)task,
					     rep, buf, len);
    case XAS_TASK_GET_GEOM:
      return xas_async_get_geom_handler (ctx,
					 (XasTaskGetGeom*)task,
					 rep, buf, len);
    case XAS_TASK_UNKNOWN:
    default:
      /* Should never get here */
      return False;
    }

  return False;
}

/* public */

XasContext*
xas_context_new(Display *xdpy)
{
  XasContext *ctx = NULL;

  ctx = (XasContext *)Xmalloc(sizeof(XasContext));

  ctx->xdpy          = xdpy;
  ctx->async.next    = xdpy->async_handlers;
  ctx->async.handler = xas_async_handler;
  ctx->async.data    = (XPointer) ctx;
  ctx->xdpy->async_handlers = &ctx->async;

  ctx->tasks_pending     = NULL;
  ctx->n_tasks_pending   = 0;
  ctx->tasks_completed   = NULL;
  ctx->n_tasks_completed = 0;

  return ctx;
}

void
xas_context_destroy(XasContext *ctx)
{
  DeqAsyncHandler (ctx->xdpy, &ctx->async);

  /* FIXME: empty pending and completed lists */

  free(ctx);
}

XasCookie
xas_get_property(XasContext *ctx,
		 Window      win,
		 Atom        property,
		 long        offset,
		 long        length,
		 Bool        delete,
		 Atom        req_type)
{
  Display            *dpy ;
  XasTaskGetProperty *task;
  xGetPropertyReq    *req;

  LockDisplay (ctx->xdpy);

  dpy = ctx->xdpy; 		/* GetReq() needs this */

  task = Xcalloc (1, sizeof (XasTaskGetProperty));
  if (task == NULL)
    {
      UnlockDisplay (dpy);
      return 0;
    }

  GetReq (GetProperty, req);
  req->window     = win;
  req->property   = property;
  req->type       = req_type;
  req->delete     = delete;
  req->longOffset = offset;
  req->longLength = length;

  /* needed ? error.sequenceNumber = ctx->xdpy->request;*/

  task_init(ctx, XAS_TASK(task), XAS_TASK_GET_PROPERTY);

  task->window   = win;
  task->property = property;

  ctx->tasks_pending = task_list_append(ctx->tasks_pending, &task->task);

  ctx->n_tasks_pending ++;

  UnlockDisplay (dpy);

  SyncHandle ();

  return task->task.request_seq;
}

Bool
xas_have_reply(XasContext          *ctx,
	       XasCookie            cookie)
{
  return (xas_find_task_for_request_seq(ctx, ctx->tasks_completed, cookie) != NULL);
}


Status
xas_get_property_reply(XasContext          *ctx,
		       XasCookie            cookie,
		       Atom                *actual_type_return,
		       int                 *actual_format_return,
		       unsigned long       *nitems_return,
		       unsigned long       *bytes_after_return,
		       unsigned char      **prop_return,
		       int                 *x_error_code)
{
  Display            *dpy;
  XasTaskGetProperty *task   = NULL;
  Bool                result = False;

  dpy = ctx->xdpy; /* For SyncHandle (); */

  if (x_error_code) *x_error_code = 0; /* No error as yet */

  task = (XasTaskGetProperty *) xas_find_task_for_request_seq(ctx,
							      ctx->tasks_completed,
							      cookie);
  if (task == NULL)
    {
      XAS_DBG("Failed to find cookie");
      return False;
    }

  if (!task->task.error)
    {
      *actual_type_return   = task->actual_type;
      *actual_format_return = task->actual_format;
      *nitems_return        = task->n_items;
      *bytes_after_return   = task->bytes_after;
      *prop_return          = task->data;

      result         = True;
    }
  else
    {
      XAS_DBG("is error");
      if (x_error_code)
	*x_error_code = task->task.error;
      result = False;;
    }

  SyncHandle ();

  ctx->tasks_completed = task_list_remove(ctx->tasks_completed,
					  XAS_TASK(task));
  ctx->n_tasks_completed--;

  XFree (task);

  return result;
}

XasCookie
xas_get_window_attributes(XasContext        *ctx,
			  Window             win)
{
  xResourceReq       *req;
  Display            *dpy ;
  XasTaskGetWinAttr  *task;

  LockDisplay (ctx->xdpy);

  dpy = ctx->xdpy; 		/* GetReq() needs this */

  task = Xcalloc (1, sizeof (XasTaskGetWinAttr));
  if (task == NULL)
    {
      UnlockDisplay (dpy);
      return 0;
    }

  GetResReq(GetWindowAttributes, win, req);

  task_init(ctx, XAS_TASK(task), XAS_TASK_GET_WIN_ATTR);

  task->window = win;

  ctx->tasks_pending = task_list_append(ctx->tasks_pending, &task->task);
  ctx->n_tasks_pending ++;

  UnlockDisplay (dpy);

  SyncHandle ();

  return task->task.request_seq;
}

XasWindowAttributes*
xas_get_window_attributes_reply(XasContext          *ctx,
				XasCookie            cookie,
				int                 *x_error_code)
{
  Display            *dpy;
  XasTaskGetWinAttr  *task   = NULL;
  XasWindowAttributes  *result = NULL;

  dpy = ctx->xdpy; /* For SyncHandle (); */

  if (x_error_code) *x_error_code = 0; /* No error as yet */

  task = (XasTaskGetWinAttr *) xas_find_task_for_request_seq(ctx,
							      ctx->tasks_completed,
							      cookie);

  if (task == NULL)
      return NULL;

  if (task->task.type != XAS_TASK_GET_WIN_ATTR)
    return NULL;

  if (!task->task.error)
    {
      result = task->attr;
    }
  else
    {
      XAS_DBG("is error");
      if (x_error_code)
	*x_error_code = task->task.error;
    }

  SyncHandle ();

  ctx->tasks_completed = task_list_remove(ctx->tasks_completed,
					  XAS_TASK(task));
  ctx->n_tasks_completed--;

  XFree (task);

  return result;
}

XasCookie
xas_get_geometry(XasContext        *ctx,
		 Drawable           d)
{
  xResourceReq       *req;
  Display            *dpy ;
  XasTaskGetGeom     *task;

  LockDisplay (ctx->xdpy);

  dpy = ctx->xdpy; 		/* GetReq() needs this */

  task = Xcalloc (1, sizeof (XasTaskGetGeom));
  if (task == NULL)
    {
      UnlockDisplay (dpy);
      return 0;
    }

  GetResReq(GetGeometry, d, req);

  task_init(ctx, XAS_TASK(task), XAS_TASK_GET_GEOM);

  task->drw = d;

  ctx->tasks_pending = task_list_append(ctx->tasks_pending, &task->task);
  ctx->n_tasks_pending ++;

  UnlockDisplay (dpy);

  SyncHandle ();

  return task->task.request_seq;
}

Status
xas_get_geometry_reply (XasContext   *ctx,
			XasCookie     cookie,
			int          *x_return,
			int          *y_return,
			unsigned int *width_return,
			unsigned int *height_return,
			unsigned int *border_width_return,
			unsigned int *depth_return,
			int          *x_error_code)
{
  Display            *dpy;
  XasTaskGetGeom  *task   = NULL;
  Status              result = False;

  dpy = ctx->xdpy; /* For SyncHandle (); */

  if (x_error_code) *x_error_code = 0; /* No error as yet */

  task = (XasTaskGetGeom *) xas_find_task_for_request_seq(ctx,
							     ctx->tasks_completed,
							     cookie);

  if (task == NULL)
    {
      XAS_DBG("Failed to find task\n");
      return False;
    }

  if (task->task.type != XAS_TASK_GET_GEOM)
    {
      XAS_DBG("Found task, but type different to expected ( %i vs %i )\n",
	      task->task.type, XAS_TASK_GET_GEOM);
      return False;
    }

  if (!task->task.error)
    {
      *x_return            = task->x;
      *y_return            = task->y;
      *width_return        = task->width;
      *height_return       = task->height;
      *border_width_return = task->border;
      *depth_return        = task->depth;
      result = True;
    }
  else
    {
      XAS_DBG("is error");
      if (x_error_code)
	*x_error_code = task->task.error;
    }

  SyncHandle ();

  ctx->tasks_completed = task_list_remove(ctx->tasks_completed,
					  XAS_TASK(task));
  ctx->n_tasks_completed--;

  XFree (task);

  return result;
}