summaryrefslogtreecommitdiff
path: root/xkb/xkbLEDs.c
blob: 8c28513ec61cf70744dc92b85d21b04eccd06cb9 (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
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
/************************************************************
Copyright (c) 1995 by Silicon Graphics Computer Systems, Inc.

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 Silicon Graphics not be 
used in advertising or publicity pertaining to distribution 
of the software without specific prior written permission.
Silicon Graphics makes no representation about the suitability 
of this software for any purpose. It is provided "as is"
without any express or implied warranty.

SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS 
SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 
AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
GRAPHICS 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.

********************************************************/

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

#include <stdio.h>
#include <ctype.h>
#include <math.h>
#include <X11/X.h>
#include <X11/Xproto.h>
#include "misc.h"
#include "inputstr.h"

#include <X11/extensions/XI.h>
#include <xkbsrv.h>
#include "xkb.h"

/***====================================================================***/

	/*
	 * unsigned
	 * XkbIndicatorsToUpdate(dev,changed,check_devs_rtrn)
	 *
	 * Given a keyboard and a set of state components that have changed,
	 * this function returns the indicators on the default keyboard 
	 * feedback that might be affected.   It also reports whether or not 
	 * any extension devices might be affected in check_devs_rtrn.
	 */

unsigned
XkbIndicatorsToUpdate(	DeviceIntPtr	dev,
			unsigned long 	state_changes,
			Bool		enable_changes)
{
register unsigned	update=	0;
XkbSrvLedInfoPtr	sli;

    sli= XkbFindSrvLedInfo(dev,XkbDfltXIClass,XkbDfltXIId,0);

    if (!sli)
        return update;

    if (state_changes&(XkbModifierStateMask|XkbGroupStateMask))
	update|= sli->usesEffective;
    if (state_changes&(XkbModifierBaseMask|XkbGroupBaseMask))
	update|= sli->usesBase;
    if (state_changes&(XkbModifierLatchMask|XkbGroupLatchMask))
	update|= sli->usesLatched;
    if (state_changes&(XkbModifierLockMask|XkbGroupLockMask))
	update|= sli->usesLocked;
    if (state_changes&XkbCompatStateMask)
	update|= sli->usesCompat;
    if (enable_changes)
	update|= sli->usesControls;
    return update;
}

/***====================================================================***/

	/*
	 * Bool
	 *XkbApplyLEDChangeToKeyboard(xkbi,map,on,change)
	 *
	 * Some indicators "drive" the keyboard when their state is explicitly 
	 * changed, as described in section 9.2.1 of the XKB protocol spec.
	 * This function updates the state and controls for the keyboard 
	 * specified by 'xkbi' to reflect any changes that are required 
	 * when the indicator described by 'map' is turned on or off.  The
	 * extent of the changes is reported in change, which must be defined.
	 */
static Bool
XkbApplyLEDChangeToKeyboard(	XkbSrvInfoPtr		xkbi,
				XkbIndicatorMapPtr	map,
				Bool			on,
				XkbChangesPtr		change)
{
Bool		ctrlChange,stateChange;
XkbStatePtr	state;

    if ((map->flags&XkbIM_NoExplicit)||((map->flags&XkbIM_LEDDrivesKB)==0))
	return FALSE;
    ctrlChange= stateChange= FALSE;
    if (map->ctrls) {
	XkbControlsPtr	ctrls= xkbi->desc->ctrls;
	unsigned 	old;

	old= ctrls->enabled_ctrls;
	if (on)	ctrls->enabled_ctrls|= map->ctrls;
	else	ctrls->enabled_ctrls&= ~map->ctrls;
	if (old!=ctrls->enabled_ctrls) {
	    change->ctrls.changed_ctrls= XkbControlsEnabledMask;
	    change->ctrls.enabled_ctrls_changes= old^ctrls->enabled_ctrls;
	    ctrlChange= TRUE;
	}
    }
    state= &xkbi->state;
    if ((map->groups)&&((map->which_groups&(~XkbIM_UseBase))!=0)) {
	register int i;
	register unsigned bit,match;

	if (on)	match= (map->groups)&XkbAllGroupsMask;
	else 	match= (~map->groups)&XkbAllGroupsMask;
	if (map->which_groups&(XkbIM_UseLocked|XkbIM_UseEffective)) {
	    for (i=0,bit=1;i<XkbNumKbdGroups;i++,bit<<=1) {
		if (bit&match)
		    break;
	    }
	    if (map->which_groups&XkbIM_UseLatched)
		XkbLatchGroup(xkbi->device,0); /* unlatch group */
	    state->locked_group= i;
	    stateChange= TRUE;
	}
	else if (map->which_groups&(XkbIM_UseLatched|XkbIM_UseEffective)) {
	    for (i=0,bit=1;i<XkbNumKbdGroups;i++,bit<<=1) {
		if (bit&match)
		    break;
	    }
	    state->locked_group= 0;
	    XkbLatchGroup(xkbi->device,i);
	    stateChange= TRUE;
	}
    }
    if ((map->mods.mask)&&((map->which_mods&(~XkbIM_UseBase))!=0)) {
	if (map->which_mods&(XkbIM_UseLocked|XkbIM_UseEffective)) {
	    register unsigned long old;
	    old= state->locked_mods;
	    if (on)	state->locked_mods|= map->mods.mask;
	    else	state->locked_mods&= ~map->mods.mask;
	    if (state->locked_mods!=old)
		stateChange= TRUE;
	}
	if (map->which_mods&(XkbIM_UseLatched|XkbIM_UseEffective)) {
	    register unsigned long newmods;
	    newmods= state->latched_mods;
	    if (on)	newmods|=  map->mods.mask;
	    else	newmods&= ~map->mods.mask;
	    if (newmods!=state->locked_mods) {
		newmods&= map->mods.mask;
		XkbLatchModifiers(xkbi->device,map->mods.mask,newmods);
		stateChange= TRUE;
	    }
	}
    }
    return (stateChange || ctrlChange);
}
	
	/*
	 * Bool
	 * ComputeAutoState(map,state,ctrls)
	 *
	 * This function reports the effect of applying the specified
	 * indicator map given the specified state and controls, as
	 * described in section 9.2 of the XKB protocol specification.
	 */

static Bool
ComputeAutoState(	XkbIndicatorMapPtr	map,
			XkbStatePtr 		state,
			XkbControlsPtr 		ctrls)
{
Bool 			on;
CARD8 			mods,group;

    on= FALSE;
    mods= group= 0;
    if (map->which_mods&XkbIM_UseAnyMods) {
	if (map->which_mods&XkbIM_UseBase)
	    mods|= state->base_mods;
	if (map->which_mods&XkbIM_UseLatched)
	    mods|= state->latched_mods;
	if (map->which_mods&XkbIM_UseLocked)
	    mods|= state->locked_mods;
	if (map->which_mods&XkbIM_UseEffective)
	    mods|= state->mods;
	if (map->which_mods&XkbIM_UseCompat)
	    mods|= state->compat_state;
	on = ((map->mods.mask&mods)!=0);
	on = on||((mods==0)&&(map->mods.mask==0)&&(map->mods.vmods==0));
    }
    if (map->which_groups&XkbIM_UseAnyGroup) {
	if (map->which_groups&XkbIM_UseBase)
	    group|= (1L << state->base_group);
	if (map->which_groups&XkbIM_UseLatched)
	    group|= (1L << state->latched_group);
	if (map->which_groups&XkbIM_UseLocked)
	    group|= (1L << state->locked_group);
	if (map->which_groups&XkbIM_UseEffective)
	    group|= (1L << state->group);
	on = on||(((map->groups&group)!=0)||(map->groups==0));
    }
    if (map->ctrls)
	on = on||(ctrls->enabled_ctrls&map->ctrls);
    return on;
}


static void
XkbUpdateLedAutoState(	DeviceIntPtr			dev,
			XkbSrvLedInfoPtr		sli,
			unsigned			maps_to_check,
			xkbExtensionDeviceNotify *	ed,
			XkbChangesPtr			changes,
			XkbEventCausePtr		cause)
{
DeviceIntPtr			kbd;
XkbStatePtr			state;
XkbControlsPtr			ctrls;
XkbChangesRec			my_changes;
xkbExtensionDeviceNotify	my_ed;
register unsigned		i,bit,affected;
register XkbIndicatorMapPtr	map;
unsigned			oldState;

    if ((maps_to_check==0)||(sli->maps==NULL)||(sli->mapsPresent==0))
	return;

    if (dev->key && dev->key->xkbInfo)
	 kbd= dev;
    else kbd= inputInfo.keyboard;

    state= &kbd->key->xkbInfo->state;
    ctrls= kbd->key->xkbInfo->desc->ctrls;
    affected= maps_to_check;
    oldState= sli->effectiveState;
    sli->autoState&= ~affected;
    for (i=0,bit=1;(i<XkbNumIndicators)&&(affected);i++,bit<<=1) {
	if ((affected&bit)==0)
	    continue;
	affected&= ~bit;
	map= &sli->maps[i];
	if((!(map->flags&XkbIM_NoAutomatic))&&ComputeAutoState(map,state,ctrls))
	    sli->autoState|= bit;
    }
    sli->effectiveState= (sli->autoState|sli->explicitState);
    affected= sli->effectiveState^oldState;
    if (affected==0)
	return;

    if (ed==NULL) {
	ed= &my_ed;
	bzero((char *)ed,sizeof(xkbExtensionDeviceNotify));
    }
    else if ((ed->reason&XkbXI_IndicatorsMask)&&
	     ((ed->ledClass!=sli->class)||(ed->ledID!=sli->id))) {
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    }

    if ((kbd==dev)&&(sli->flags&XkbSLI_IsDefault)) {
	if (changes==NULL) {
	    changes= &my_changes;
	    bzero((char *)changes,sizeof(XkbChangesRec));
	}
	changes->indicators.state_changes|= affected;
    }

    ed->reason|=	XkbXI_IndicatorStateMask;
    ed->ledClass= 	sli->class;
    ed->ledID=		sli->id;
    ed->ledsDefined=	sli->namesPresent|sli->mapsPresent;
    ed->ledState=	sli->effectiveState;
    ed->unsupported=	0;
    ed->supported=	XkbXI_AllFeaturesMask;

    if (changes!=&my_changes)	changes= NULL;
    if (ed!=&my_ed)		ed= NULL;
    if (changes || ed)
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    return;
}

static void
XkbUpdateAllDeviceIndicators(XkbChangesPtr changes,XkbEventCausePtr cause)
{
DeviceIntPtr		edev;
XkbSrvLedInfoPtr	sli;

    for (edev=inputInfo.devices;edev!=NULL;edev=edev->next) {
	if (edev->kbdfeed) {
	    KbdFeedbackPtr	kf;
	    for (kf=edev->kbdfeed;kf!=NULL;kf=kf->next) {
		if ((kf->xkb_sli==NULL)||(kf->xkb_sli->maps==NULL))
		    continue;
		sli= kf->xkb_sli;
		XkbUpdateLedAutoState(edev,sli,sli->mapsPresent,NULL,
								changes,cause);
			
	    }
	}
	if (edev->leds) {
	    LedFeedbackPtr	lf;
	    for (lf=edev->leds;lf!=NULL;lf=lf->next) {
		if ((lf->xkb_sli==NULL)||(lf->xkb_sli->maps==NULL))
		    continue;
		sli= lf->xkb_sli;
		XkbUpdateLedAutoState(edev,sli,sli->mapsPresent,NULL,
								changes,cause);
			
	    }
	}
    }
    return;
}


/***====================================================================***/

	/*
	 * void
	 * XkbSetIndicators(dev,affect,values,cause)
	 *
	 * Attempts to change the indicators specified in 'affect' to the
	 * states specified in 'values' for the default keyboard feedback
	 * on the keyboard specified by 'dev.'   Attempts to change indicator
	 * state might be ignored or have no affect, depending on the XKB
	 * indicator map for any affected indicators, as described in section
	 * 9.2 of the XKB protocol specification.
	 *
	 * If 'changes' is non-NULL, this function notes any changes to the
	 * keyboard state, controls, or indicator state that result from this
	 * attempted change.   If 'changes' is NULL, this function generates
	 * XKB events to report any such changes to interested clients.
	 *
	 * If 'cause' is non-NULL, it specifies the reason for the change, 
	 * as reported in some XKB events.   If it is NULL, this function 
	 * assumes that the change is the result of a core protocol 
	 * ChangeKeyboardMapping request.
	 */

void
XkbSetIndicators(	DeviceIntPtr		dev,
			CARD32			affect,
			CARD32			values,
			XkbEventCausePtr	cause)
{
XkbSrvLedInfoPtr		sli;
XkbChangesRec			changes;
xkbExtensionDeviceNotify	ed;
unsigned 			side_affected;

    bzero((char *)&changes,sizeof(XkbChangesRec));
    bzero((char *)&ed,sizeof(xkbExtensionDeviceNotify));
    sli= XkbFindSrvLedInfo(dev,XkbDfltXIClass,XkbDfltXIId,0);
    sli->explicitState&= ~affect;
    sli->explicitState|= (affect&values);
    XkbApplyLedStateChanges(dev,sli,affect,&ed,&changes,cause);

    side_affected= 0;
    if (changes.state_changes!=0)
	side_affected|= XkbIndicatorsToUpdate(dev,changes.state_changes,FALSE);
    if (changes.ctrls.enabled_ctrls_changes)
	side_affected|= sli->usesControls;

    if (side_affected) {
	XkbUpdateLedAutoState(dev,sli,side_affected,&ed,&changes,cause);
	affect|= side_affected;
    }
    if (changes.state_changes || changes.ctrls.enabled_ctrls_changes)
	XkbUpdateAllDeviceIndicators(NULL,cause);

    XkbFlushLedEvents(dev,dev,sli,&ed,&changes,cause);
    return;
}

/***====================================================================***/

/***====================================================================***/

	/*
	 * void
	 * XkbUpdateIndicators(dev,update,check_edevs,changes,cause)
	 *
	 * Applies the indicator maps for any indicators specified in
	 * 'update' from the default keyboard feedback on the device
	 * specified by 'dev.' 
	 *
	 * If 'changes' is NULL, this function generates and XKB events
	 * required to report the necessary changes, otherwise it simply
	 * notes the indicators with changed state.
	 *
	 * If 'check_edevs' is TRUE, this function also checks the indicator
	 * maps for any open extension devices that have them, and updates
	 * the state of any extension device indicators as necessary.
	 */

void
XkbUpdateIndicators(	DeviceIntPtr		dev,
			register CARD32		update,
			Bool			check_edevs,
			XkbChangesPtr		changes,
			XkbEventCausePtr	cause)
{
XkbSrvLedInfoPtr	sli;

    sli= XkbFindSrvLedInfo(dev,XkbDfltXIClass,XkbDfltXIId,0);
    XkbUpdateLedAutoState(dev,sli,update,NULL,changes,cause);
    if (check_edevs)
	XkbUpdateAllDeviceIndicators(changes,cause);
    return;
}

/***====================================================================***/

/***====================================================================***/

	/*
	 * void
	 * XkbCheckIndicatorMaps(dev,sli,which)
	 *
	 * Updates the 'indicator accelerators' for the indicators specified
	 * by 'which' in the feedback specified by 'sli.' The indicator 
	 * accelerators are internal to the server and are used to simplify 
	 * and speed up the process of figuring out which indicators might 
	 * be affected by a particular change in keyboard state or controls.
	 */

void
XkbCheckIndicatorMaps(DeviceIntPtr dev,XkbSrvLedInfoPtr sli,unsigned which)
{
register unsigned	i,bit;
XkbIndicatorMapPtr	map;
XkbDescPtr		xkb;

    if ((sli->flags&XkbSLI_HasOwnState)==0)
        return;

    sli->usesBase&=	 ~which;
    sli->usesLatched&=	 ~which;
    sli->usesLocked&=	 ~which;
    sli->usesEffective&= ~which;
    sli->usesCompat&=	 ~which;
    sli->usesControls&=	 ~which;
    sli->mapsPresent&=	 ~which;

    xkb= dev->key->xkbInfo->desc;
    for (i=0,bit=1,map=sli->maps;i<XkbNumIndicators;i++,bit<<=1,map++) {
	if (which&bit) {
	    CARD8		what;

	    if (!map || !XkbIM_InUse(map))
		continue;
	    sli->mapsPresent|= bit;

	    what= (map->which_mods|map->which_groups);
	    if (what&XkbIM_UseBase)
		 sli->usesBase|= bit;
	    if (what&XkbIM_UseLatched)
		 sli->usesLatched|= bit;
	    if (what&XkbIM_UseLocked)
		 sli->usesLocked|= bit;
	    if (what&XkbIM_UseEffective)
		 sli->usesEffective|= bit;
	    if (what&XkbIM_UseCompat)
		 sli->usesCompat|= bit;
	    if (map->ctrls)
		 sli->usesControls|= bit;

	    map->mods.mask= map->mods.real_mods;
	    if (map->mods.vmods!=0) {
		map->mods.mask|= XkbMaskForVMask(xkb,map->mods.vmods);
	    }
	}
    }
    sli->usedComponents= 0;
    if (sli->usesBase)
	sli->usedComponents|= XkbModifierBaseMask|XkbGroupBaseMask;
    if (sli->usesLatched)
	sli->usedComponents|= XkbModifierLatchMask|XkbGroupLatchMask;
    if (sli->usesLocked)
	sli->usedComponents|= XkbModifierLockMask|XkbGroupLockMask;
    if (sli->usesEffective)
	sli->usedComponents|= XkbModifierStateMask|XkbGroupStateMask;
    if (sli->usesCompat)
	sli->usedComponents|= XkbCompatStateMask;
    return;
}

/***====================================================================***/

	/*
	 * XkbSrvLedInfoPtr
	 * XkbAllocSrvLedInfo(dev,kf,lf,needed_parts)
	 *
	 * Allocates an XkbSrvLedInfoPtr for the feedback specified by either
	 * 'kf' or 'lf' on the keyboard specified by 'dev.'
	 *
	 * If 'needed_parts' is non-zero, this function makes sure that any
	 * of the parts speicified therein are allocated.
	 */
XkbSrvLedInfoPtr
XkbAllocSrvLedInfo(	DeviceIntPtr		dev,
			KbdFeedbackPtr		kf,
			LedFeedbackPtr		lf,
			unsigned		needed_parts)
{
XkbSrvLedInfoPtr	sli;
Bool			checkAccel;
Bool			checkNames;

    sli= NULL;
    checkAccel= checkNames= FALSE;
    if ((kf!=NULL)&&(kf->xkb_sli==NULL)) {
	kf->xkb_sli= sli= xcalloc(1, sizeof(XkbSrvLedInfoRec));
	if (sli==NULL)
	    return NULL; /* ALLOCATION ERROR */
	if (dev->key && dev->key->xkbInfo)
	     sli->flags= XkbSLI_HasOwnState;
	else sli->flags= 0;	
	sli->class=	KbdFeedbackClass;
	sli->id=	kf->ctrl.id;
	sli->fb.kf=	kf;

	sli->autoState=		0;
	sli->explicitState=	kf->ctrl.leds;
	sli->effectiveState=	kf->ctrl.leds;

	if ((kf==dev->kbdfeed) && (dev->key) && (dev->key->xkbInfo)) {
	    XkbDescPtr	xkb;
	    xkb= dev->key->xkbInfo->desc;
	    sli->flags|= 		XkbSLI_IsDefault;
	    sli->physIndicators=	xkb->indicators->phys_indicators;
	    sli->names=			xkb->names->indicators;
	    sli->maps=			xkb->indicators->maps;
	    checkNames= checkAccel=	TRUE;
	}
	else {
	    sli->physIndicators=	XkbAllIndicatorsMask;
	    sli->names=			NULL;
	    sli->maps=			NULL;
	}
    }
    else if ((kf!=NULL)&&((kf->xkb_sli->flags&XkbSLI_IsDefault)!=0)) {
	XkbDescPtr	xkb;
	xkb= dev->key->xkbInfo->desc;
	sli->physIndicators=	xkb->indicators->phys_indicators;
	if (xkb->names->indicators!=sli->names) {
	    checkNames= TRUE;
	    sli->names= xkb->names->indicators;
	}
	if (xkb->indicators->maps!=sli->maps) {
	    checkAccel= TRUE;
	    sli->maps= xkb->indicators->maps;
	}
    }
    else if ((lf!=NULL)&&(lf->xkb_sli==NULL)) {
	lf->xkb_sli= sli= xcalloc(1, sizeof(XkbSrvLedInfoRec));
	if (sli==NULL)
	    return NULL; /* ALLOCATION ERROR */
	if (dev->key && dev->key->xkbInfo)
	     sli->flags= XkbSLI_HasOwnState;
	else sli->flags= 0;	
	sli->class=	LedFeedbackClass;
	sli->id=	lf->ctrl.id;
	sli->fb.lf=	lf;

	sli->physIndicators=	lf->ctrl.led_mask;
	sli->autoState=		0;
	sli->explicitState=	lf->ctrl.led_values;
	sli->effectiveState=	lf->ctrl.led_values;
	sli->maps=		NULL;
	sli->names=		NULL;
    }
    if ((sli->names==NULL)&&(needed_parts&XkbXI_IndicatorNamesMask))
	sli->names= xcalloc(XkbNumIndicators, sizeof(Atom));
    if ((sli->maps==NULL)&&(needed_parts&XkbXI_IndicatorMapsMask))
	sli->maps= xcalloc(XkbNumIndicators, sizeof(XkbIndicatorMapRec));
    if (checkNames) {
	register unsigned i,bit;
	sli->namesPresent=	0;
	for (i=0,bit=1;i<XkbNumIndicators;i++,bit<<=1) {
	    if (sli->names[i]!=None)
		sli->namesPresent|= bit;
	}
    }
    if (checkAccel)
	 XkbCheckIndicatorMaps(dev,sli,XkbAllIndicatorsMask);
    return sli;
}

void
XkbFreeSrvLedInfo(XkbSrvLedInfoPtr sli)
{
    if ((sli->flags&XkbSLI_IsDefault)==0) {
	if (sli->maps)	xfree(sli->maps);
	if (sli->names)	xfree(sli->names);
    }
    sli->maps= NULL;
    sli->names= NULL;
    xfree(sli);
    return;
}

/*
 * XkbSrvLedInfoPtr
 * XkbCopySrvLedInfo(dev,src,kf,lf)
 *
 * Takes the given XkbSrvLedInfoPtr and duplicates it. A deep copy is made,
 * thus the new copy behaves like the original one and can be freed with
 * XkbFreeSrvLedInfo.
 */
XkbSrvLedInfoPtr
XkbCopySrvLedInfo(	DeviceIntPtr		from,
			XkbSrvLedInfoPtr	src,
			KbdFeedbackPtr		kf,
			LedFeedbackPtr		lf)
{
    XkbSrvLedInfoPtr sli_new = NULL;

    if (!src)
	goto finish;

    sli_new = xcalloc(1, sizeof( XkbSrvLedInfoRec));
    if (!sli_new)
	goto finish;

    memcpy(sli_new, src, sizeof(XkbSrvLedInfoRec));
    if (sli_new->class == KbdFeedbackClass)
	sli_new->fb.kf = kf;
    else
	sli_new->fb.lf = lf;

    if (!(sli_new->flags & XkbSLI_IsDefault)) {
	sli_new->names= xcalloc(XkbNumIndicators, sizeof(Atom));
	sli_new->maps= xcalloc(XkbNumIndicators, sizeof(XkbIndicatorMapRec));
    } /* else sli_new->names/maps is pointing to
	dev->key->xkbInfo->desc->names->indicators;
	dev->key->xkbInfo->desc->names->indicators; */

finish:
    return sli_new;
}

/***====================================================================***/

	/*
	 * XkbSrvLedInfoPtr
	 * XkbFindSrvLedInfo(dev,class,id,needed_parts)
	 *
	 * Finds the XkbSrvLedInfoPtr for the specified 'class' and 'id'
	 * on the device specified by 'dev.'   If the class and id specify
	 * a valid device feedback, this function returns the existing 
	 * feedback or allocates a new one.
	 *
	 */

XkbSrvLedInfoPtr
XkbFindSrvLedInfo(	DeviceIntPtr		dev,
			unsigned		class,
			unsigned		id,
			unsigned		needed_parts)
{
XkbSrvLedInfoPtr	sli;

    /* optimization to check for most common case */
    if (((class==XkbDfltXIClass)&&(id==XkbDfltXIId))&&(dev->kbdfeed)) {
	XkbSrvLedInfoPtr	sli;
	sli= dev->kbdfeed->xkb_sli;
	if (dev->kbdfeed->xkb_sli==NULL) {
	    sli= XkbAllocSrvLedInfo(dev,dev->kbdfeed,NULL,needed_parts);
	    dev->kbdfeed->xkb_sli= sli;
	}
	return dev->kbdfeed->xkb_sli;
    }

    sli= NULL;
    if (class==XkbDfltXIClass) {
	if (dev->kbdfeed)	class= KbdFeedbackClass;
	else if (dev->leds)	class= LedFeedbackClass;
	else 			return NULL;
    }
    if (class==KbdFeedbackClass) {
	KbdFeedbackPtr	kf;
	for (kf=dev->kbdfeed;kf!=NULL;kf=kf->next) {
	    if ((id==XkbDfltXIId)||(id==kf->ctrl.id)) {
		if (kf->xkb_sli==NULL)
		    kf->xkb_sli= XkbAllocSrvLedInfo(dev,kf,NULL,needed_parts);
		sli= kf->xkb_sli;
		break;
	    }	
	}
    }
    else if (class==LedFeedbackClass) {
	LedFeedbackPtr	lf;
	for (lf=dev->leds;lf!=NULL;lf=lf->next) {
	    if ((id==XkbDfltXIId)||(id==lf->ctrl.id)) {
		if (lf->xkb_sli==NULL)
		    lf->xkb_sli= XkbAllocSrvLedInfo(dev,NULL,lf,needed_parts);
		sli= lf->xkb_sli;
		break;
	    }	
	}
    }
    if ((sli->names==NULL)&&(needed_parts&XkbXI_IndicatorNamesMask))
	sli->names= xcalloc(XkbNumIndicators, sizeof(Atom));
    if ((sli->maps==NULL)&&(needed_parts&XkbXI_IndicatorMapsMask))
	sli->maps= xcalloc(XkbNumIndicators, sizeof(XkbIndicatorMapRec));
    return sli;
}

/***====================================================================***/

void
XkbFlushLedEvents(	DeviceIntPtr			dev,
			DeviceIntPtr			kbd,
			XkbSrvLedInfoPtr		sli,
			xkbExtensionDeviceNotify *	ed,
			XkbChangesPtr			changes,
			XkbEventCausePtr		cause)
{
    if (changes) {
	if (changes->indicators.state_changes)
	    XkbDDXUpdateDeviceIndicators(dev,sli,sli->effectiveState);
	XkbSendNotification(kbd,changes,cause);
	bzero((char *)changes,sizeof(XkbChangesRec));

	if (XkbAX_NeedFeedback(kbd->key->xkbInfo->desc->ctrls, XkbAX_IndicatorFBMask)) {
		if (sli->effectiveState)
			/* it appears that the which parameter is not used */
			XkbDDXAccessXBeep(dev, _BEEP_LED_ON, XkbAccessXFeedbackMask);
		else
			XkbDDXAccessXBeep(dev, _BEEP_LED_OFF, XkbAccessXFeedbackMask);
	}
    }
    if (ed) {
	if (ed->reason) {
	    if ((dev!=kbd)&&(ed->reason&XkbXI_IndicatorStateMask))
		XkbDDXUpdateDeviceIndicators(dev,sli,sli->effectiveState);
	    XkbSendExtensionDeviceNotify(dev,cause->client,ed);
	}
	bzero((char *)ed,sizeof(XkbExtensionDeviceNotify));
    }
    return;
}

/***====================================================================***/

void
XkbApplyLedNameChanges(	DeviceIntPtr 			dev,
			XkbSrvLedInfoPtr		sli,
			unsigned			changed_names,
			xkbExtensionDeviceNotify *	ed,
			XkbChangesPtr			changes,
			XkbEventCausePtr		cause)
{
DeviceIntPtr			kbd;
XkbChangesRec			my_changes;
xkbExtensionDeviceNotify	my_ed;

    if (changed_names==0)
	return;
    if (dev->key && dev->key->xkbInfo)
	 kbd= dev;
    else kbd= inputInfo.keyboard;

    if (ed==NULL) {
	ed= &my_ed;
	bzero((char *)ed,sizeof(xkbExtensionDeviceNotify));
    }
    else if ((ed->reason&XkbXI_IndicatorsMask)&&
	     ((ed->ledClass!=sli->class)||(ed->ledID!=sli->id))) {
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    }

    if ((kbd==dev)&&(sli->flags&XkbSLI_IsDefault)) { 
	if (changes==NULL) {
	   changes= &my_changes;
	   bzero((char *)changes,sizeof(XkbChangesRec));
	}
	changes->names.changed|= XkbIndicatorNamesMask;
	changes->names.changed_indicators|= changed_names;
    }

    ed->reason|=	XkbXI_IndicatorNamesMask;
    ed->ledClass= 	sli->class;
    ed->ledID=		sli->id;
    ed->ledsDefined=	sli->namesPresent|sli->mapsPresent;
    ed->ledState=	sli->effectiveState;
    ed->unsupported=	0;
    ed->supported=	XkbXI_AllFeaturesMask;

    if (changes!=&my_changes)	changes= NULL;
    if (ed!=&my_ed)		ed= NULL;
    if (changes || ed)
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    return;
}
/***====================================================================***/

	/*
	 * void
	 * XkbApplyLedMapChanges(dev,sli,changed_maps,changes,cause)
	 *
	 * Handles all of the secondary effects of the changes to the
	 * feedback specified by 'sli' on the device specified by 'dev.'
	 * 
	 * If 'changed_maps' specifies any indicators, this function generates
	 * XkbExtensionDeviceNotify events and possibly IndicatorMapNotify
	 * events to report the changes, and recalculates the effective
	 * state of each indicator with a changed map.  If any indicators
	 * change state, the server generates XkbExtensionDeviceNotify and
	 * XkbIndicatorStateNotify events as appropriate.
	 *
	 * If 'changes' is non-NULL, this function updates it to reflect
	 * any changes to the keyboard state or controls or to the 'core'
	 * indicator names, maps, or state.   If 'changes' is NULL, this
	 * function generates XKB events as needed to report the changes.
	 * If 'dev' is not a keyboard device, any changes are reported
	 * for the core keyboard.
	 *
	 * The 'cause' specifies the reason for the event (key event or
	 * request) for the change, as reported in some XKB events.
	 */

void
XkbApplyLedMapChanges(	DeviceIntPtr 			dev,
			XkbSrvLedInfoPtr		sli,
			unsigned			changed_maps,
			xkbExtensionDeviceNotify *	ed,
			XkbChangesPtr			changes,
			XkbEventCausePtr		cause)
{
DeviceIntPtr			kbd;
XkbChangesRec			my_changes;
xkbExtensionDeviceNotify	my_ed;

    if (changed_maps==0)
	return;
    if (dev->key && dev->key->xkbInfo)
	 kbd= dev;
    else kbd= inputInfo.keyboard;

    if (ed==NULL) {
	ed= &my_ed;
	bzero((char *)ed,sizeof(xkbExtensionDeviceNotify));
    }
    else if ((ed->reason&XkbXI_IndicatorsMask)&&
	     ((ed->ledClass!=sli->class)||(ed->ledID!=sli->id))) {
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    }

    if ((kbd==dev)&&(sli->flags&XkbSLI_IsDefault)) {
	if (changes==NULL) {
	    changes= &my_changes;
	    bzero((char *)changes,sizeof(XkbChangesRec));
	}
	changes->indicators.map_changes|= changed_maps;
    }

    XkbCheckIndicatorMaps(dev,sli,changed_maps);

    ed->reason|=	XkbXI_IndicatorMapsMask;
    ed->ledClass= 	sli->class;
    ed->ledID=		sli->id;
    ed->ledsDefined=	sli->namesPresent|sli->mapsPresent;
    ed->ledState=	sli->effectiveState;
    ed->unsupported=	0;
    ed->supported=	XkbXI_AllFeaturesMask;

    XkbUpdateLedAutoState(dev,sli,changed_maps,ed,changes,cause);

    if (changes!=&my_changes)	changes= NULL;
    if (ed!=&my_ed)		ed= NULL;
    if (changes || ed)
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    return;
}

/***====================================================================***/

void
XkbApplyLedStateChanges(DeviceIntPtr 			dev,
			XkbSrvLedInfoPtr		sli,
			unsigned			changed_leds,
			xkbExtensionDeviceNotify *	ed,
			XkbChangesPtr			changes,
			XkbEventCausePtr		cause)
{
XkbSrvInfoPtr			xkbi;
DeviceIntPtr			kbd;
XkbChangesRec			my_changes;
xkbExtensionDeviceNotify	my_ed;
register unsigned		i,bit,affected;
XkbIndicatorMapPtr		map;
unsigned			oldState;
Bool				kb_changed;

    if (changed_leds==0)
	return;
    if (dev->key && dev->key->xkbInfo)
	 kbd= dev;
    else kbd= inputInfo.keyboard;
    xkbi= kbd->key->xkbInfo;

    if (changes==NULL) {
	changes= &my_changes;
	bzero((char *)changes,sizeof(XkbChangesRec));
    }

    kb_changed= FALSE;
    affected= changed_leds;
    oldState= sli->effectiveState;
    for (i=0,bit=1;(i<XkbNumIndicators)&&(affected);i++,bit<<=1) {
	if ((affected&bit)==0)
	    continue;
	affected&= ~bit;
	map= &sli->maps[i];
	if (map->flags&XkbIM_NoExplicit) {
	    sli->explicitState&= ~bit;
	    continue;
	}
	if (map->flags&XkbIM_LEDDrivesKB) {
	    Bool on= ((sli->explicitState&bit)!=0);
	    if (XkbApplyLEDChangeToKeyboard(xkbi,map,on,changes))
		kb_changed= TRUE;
	}
    }
    sli->effectiveState= (sli->autoState|sli->explicitState);
    affected= sli->effectiveState^oldState;

    if (ed==NULL) {
	ed= &my_ed;
	bzero((char *)ed,sizeof(xkbExtensionDeviceNotify));
    }
    else if (affected&&(ed->reason&XkbXI_IndicatorsMask)&&
	     ((ed->ledClass!=sli->class)||(ed->ledID!=sli->id))) {
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    }

    if ((kbd==dev)&&(sli->flags&XkbSLI_IsDefault))
	changes->indicators.state_changes|= affected;
    if (affected) {
	ed->reason|=		XkbXI_IndicatorStateMask;
	ed->ledClass= 		sli->class;
	ed->ledID=		sli->id;
	ed->ledsDefined=	sli->namesPresent|sli->mapsPresent;
	ed->ledState=		sli->effectiveState;
	ed->unsupported=	0;
	ed->supported=		XkbXI_AllFeaturesMask;
    }

    if (kb_changed) {
	XkbComputeDerivedState(kbd->key->xkbInfo);
	XkbUpdateLedAutoState(dev,sli,sli->mapsPresent,ed,changes,cause);
    }

    if (changes!=&my_changes)	changes= NULL;
    if (ed!=&my_ed)		ed= NULL;
    if (changes || ed)
	XkbFlushLedEvents(dev,kbd,sli,ed,changes,cause);
    if (kb_changed)
	XkbUpdateAllDeviceIndicators(NULL,cause);
    return;
}