summaryrefslogtreecommitdiff
path: root/tmk_core/common/action.c
blob: 44b19d368e8bb04315cbfadbed9effe03e4c09c1 (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
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
/*
Copyright 2012,2013 Jun Wako <wakojun@gmail.com>

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "host.h"
#include "keycode.h"
#include "keyboard.h"
#include "mousekey.h"
#include "command.h"
#include "led.h"
#include "backlight.h"
#include "action_layer.h"
#include "action_tapping.h"
#include "action_macro.h"
#include "action_util.h"
#include "action.h"
#include "wait.h"

#ifdef DEBUG_ACTION
#    include "debug.h"
#else
#    include "nodebug.h"
#endif

int tp_buttons;

#ifdef RETRO_TAPPING
int retro_tapping_counter = 0;
#endif

#ifdef FAUXCLICKY_ENABLE
#    include <fauxclicky.h>
#endif

#ifndef TAP_CODE_DELAY
#    define TAP_CODE_DELAY 0
#endif
#ifndef TAP_HOLD_CAPS_DELAY
#    define TAP_HOLD_CAPS_DELAY 80
#endif
/** \brief Called to execute an action.
 *
 * FIXME: Needs documentation.
 */
void action_exec(keyevent_t event) {
    if (!IS_NOEVENT(event)) {
        dprint("\n---- action_exec: start -----\n");
        dprint("EVENT: ");
        debug_event(event);
        dprintln();
#ifdef RETRO_TAPPING
        retro_tapping_counter++;
#endif
    }

#ifdef FAUXCLICKY_ENABLE
    if (IS_PRESSED(event)) {
        FAUXCLICKY_ACTION_PRESS;
    }
    if (IS_RELEASED(event)) {
        FAUXCLICKY_ACTION_RELEASE;
    }
    fauxclicky_check();
#endif

#ifdef SWAP_HANDS_ENABLE
    if (!IS_NOEVENT(event)) {
        process_hand_swap(&event);
    }
#endif

    keyrecord_t record = {.event = event};

#if (defined(ONESHOT_TIMEOUT) && (ONESHOT_TIMEOUT > 0))
    if (has_oneshot_layer_timed_out()) {
        clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
    }
    if (has_oneshot_mods_timed_out()) {
        clear_oneshot_mods();
    }
#endif

#ifndef NO_ACTION_TAPPING
    action_tapping_process(record);
#else
    process_record(&record);
    if (!IS_NOEVENT(record.event)) {
        dprint("processed: ");
        debug_record(record);
        dprintln();
    }
#endif
}

#ifdef SWAP_HANDS_ENABLE
bool swap_hands = false;
bool swap_held  = false;

/** \brief Process Hand Swap
 *
 * FIXME: Needs documentation.
 */
void process_hand_swap(keyevent_t *event) {
    static swap_state_row_t swap_state[MATRIX_ROWS];

    keypos_t         pos     = event->key;
    swap_state_row_t col_bit = (swap_state_row_t)1 << pos.col;
    bool             do_swap = event->pressed ? swap_hands : swap_state[pos.row] & (col_bit);

    if (do_swap) {
        event->key = hand_swap_config[pos.row][pos.col];
        swap_state[pos.row] |= col_bit;
    } else {
        swap_state[pos.row] &= ~(col_bit);
    }
}
#endif

#if !defined(NO_ACTION_LAYER) && !defined(STRICT_LAYER_RELEASE)
bool disable_action_cache = false;

void process_record_nocache(keyrecord_t *record) {
    disable_action_cache = true;
    process_record(record);
    disable_action_cache = false;
}
#else
void process_record_nocache(keyrecord_t *record) { process_record(record); }
#endif

__attribute__((weak)) bool process_record_quantum(keyrecord_t *record) { return true; }

#ifndef NO_ACTION_TAPPING
/** \brief Allows for handling tap-hold actions immediately instead of waiting for TAPPING_TERM or another keypress.
 *
 * FIXME: Needs documentation.
 */
void process_record_tap_hint(keyrecord_t *record) {
    action_t action = layer_switch_get_action(record->event.key);

    switch (action.kind.id) {
#    ifdef SWAP_HANDS_ENABLE
        case ACT_SWAP_HANDS:
            switch (action.swap.code) {
                case OP_SH_TAP_TOGGLE:
                default:
                    swap_hands = !swap_hands;
                    swap_held  = true;
            }
            break;
#    endif
    }
}
#endif

/** \brief Take a key event (key press or key release) and processes it.
 *
 * FIXME: Needs documentation.
 */
void process_record(keyrecord_t *record) {
    if (IS_NOEVENT(record->event)) {
        return;
    }

    if (!process_record_quantum(record)) return;

    action_t action = store_or_get_action(record->event.pressed, record->event.key);
    dprint("ACTION: ");
    debug_action(action);
#ifndef NO_ACTION_LAYER
    dprint(" layer_state: ");
    layer_debug();
    dprint(" default_layer_state: ");
    default_layer_debug();
#endif
    dprintln();

    process_action(record, action);
}

/** \brief Take an action and processes it.
 *
 * FIXME: Needs documentation.
 */
void process_action(keyrecord_t *record, action_t action) {
    keyevent_t event = record->event;
#ifndef NO_ACTION_TAPPING
    uint8_t tap_count = record->tap.count;
#endif

    if (event.pressed) {
        // clear the potential weak mods left by previously pressed keys
        clear_weak_mods();
    }

#ifndef NO_ACTION_ONESHOT
    bool do_release_oneshot = false;
    // notice we only clear the one shot layer if the pressed key is not a modifier.
    if (is_oneshot_layer_active() && event.pressed && !IS_MOD(action.key.code)) {
        clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
        do_release_oneshot = !is_oneshot_layer_active();
    }
#endif

    switch (action.kind.id) {
        /* Key and Mods */
        case ACT_LMODS:
        case ACT_RMODS: {
            uint8_t mods = (action.kind.id == ACT_LMODS) ? action.key.mods : action.key.mods << 4;
            if (event.pressed) {
                if (mods) {
                    if (IS_MOD(action.key.code) || action.key.code == KC_NO) {
                        // e.g. LSFT(KC_LGUI): we don't want the LSFT to be weak as it would make it useless.
                        // This also makes LSFT(KC_LGUI) behave exactly the same as LGUI(KC_LSFT).
                        // Same applies for some keys like KC_MEH which are declared as MEH(KC_NO).
                        add_mods(mods);
                    } else {
                        add_weak_mods(mods);
                    }
                    send_keyboard_report();
                }
                register_code(action.key.code);
            } else {
                unregister_code(action.key.code);
                if (mods) {
                    if (IS_MOD(action.key.code) || action.key.code == KC_NO) {
                        del_mods(mods);
                    } else {
                        del_weak_mods(mods);
                    }
                    send_keyboard_report();
                }
            }
        } break;
#ifndef NO_ACTION_TAPPING
        case ACT_LMODS_TAP:
        case ACT_RMODS_TAP: {
            uint8_t mods = (action.kind.id == ACT_LMODS_TAP) ? action.key.mods : action.key.mods << 4;
            switch (action.layer_tap.code) {
#    ifndef NO_ACTION_ONESHOT
                case MODS_ONESHOT:
                    // Oneshot modifier
                    if (event.pressed) {
                        if (tap_count == 0) {
                            dprint("MODS_TAP: Oneshot: 0\n");
                            register_mods(mods | get_oneshot_mods());
                        } else if (tap_count == 1) {
                            dprint("MODS_TAP: Oneshot: start\n");
                            set_oneshot_mods(mods | get_oneshot_mods());
#        if defined(ONESHOT_TAP_TOGGLE) && ONESHOT_TAP_TOGGLE > 1
                        } else if (tap_count == ONESHOT_TAP_TOGGLE) {
                            dprint("MODS_TAP: Toggling oneshot");
                            clear_oneshot_mods();
                            set_oneshot_locked_mods(mods);
                            register_mods(mods);
#        endif
                        } else {
                            register_mods(mods | get_oneshot_mods());
                        }
                    } else {
                        if (tap_count == 0) {
                            clear_oneshot_mods();
                            unregister_mods(mods);
                        } else if (tap_count == 1) {
                            // Retain Oneshot mods
#        if defined(ONESHOT_TAP_TOGGLE) && ONESHOT_TAP_TOGGLE > 1
                            if (mods & get_mods()) {
                                clear_oneshot_locked_mods();
                                clear_oneshot_mods();
                                unregister_mods(mods);
                            }
                        } else if (tap_count == ONESHOT_TAP_TOGGLE) {
                            // Toggle Oneshot Layer
#        endif
                        } else {
                            clear_oneshot_mods();
                            unregister_mods(mods);
                        }
                    }
                    break;
#    endif
                case MODS_TAP_TOGGLE:
                    if (event.pressed) {
                        if (tap_count <= TAPPING_TOGGLE) {
                            register_mods(mods);
                        }
                    } else {
                        if (tap_count < TAPPING_TOGGLE) {
                            unregister_mods(mods);
                        }
                    }
                    break;
                default:
                    if (event.pressed) {
                        if (tap_count > 0) {
#    ifndef IGNORE_MOD_TAP_INTERRUPT
                            if (record->tap.interrupted) {
                                dprint("mods_tap: tap: cancel: add_mods\n");
                                // ad hoc: set 0 to cancel tap
                                record->tap.count = 0;
                                register_mods(mods);
                            } else
#    endif
                            {
                                dprint("MODS_TAP: Tap: register_code\n");
                                register_code(action.key.code);
                            }
                        } else {
                            dprint("MODS_TAP: No tap: add_mods\n");
                            register_mods(mods);
                        }
                    } else {
                        if (tap_count > 0) {
                            dprint("MODS_TAP: Tap: unregister_code\n");
                            if (action.layer_tap.code == KC_CAPS) {
                                wait_ms(TAP_HOLD_CAPS_DELAY);
                            }
                            unregister_code(action.key.code);
                        } else {
                            dprint("MODS_TAP: No tap: add_mods\n");
                            unregister_mods(mods);
                        }
                    }
                    break;
            }
        } break;
#endif
#ifdef EXTRAKEY_ENABLE
        /* other HID usage */
        case ACT_USAGE:
            switch (action.usage.page) {
                case PAGE_SYSTEM:
                    if (event.pressed) {
                        host_system_send(action.usage.code);
                    } else {
                        host_system_send(0);
                    }
                    break;
                case PAGE_CONSUMER:
                    if (event.pressed) {
                        host_consumer_send(action.usage.code);
                    } else {
                        host_consumer_send(0);
                    }
                    break;
            }
            break;
#endif
#ifdef MOUSEKEY_ENABLE
        /* Mouse key */
        case ACT_MOUSEKEY:
            if (event.pressed) {
                switch (action.key.code) {
                    case KC_MS_BTN1:
                        tp_buttons |= (1 << 0);
                        break;
                    case KC_MS_BTN2:
                        tp_buttons |= (1 << 1);
                        break;
                    case KC_MS_BTN3:
                        tp_buttons |= (1 << 2);
                        break;
                    default:
                        break;
                }
                mousekey_on(action.key.code);
                mousekey_send();
            } else {
                switch (action.key.code) {
                    case KC_MS_BTN1:
                        tp_buttons &= ~(1 << 0);
                        break;
                    case KC_MS_BTN2:
                        tp_buttons &= ~(1 << 1);
                        break;
                    case KC_MS_BTN3:
                        tp_buttons &= ~(1 << 2);
                        break;
                    default:
                        break;
                }
                mousekey_off(action.key.code);
                mousekey_send();
            }
            break;
#endif
#ifndef NO_ACTION_LAYER
        case ACT_LAYER:
            if (action.layer_bitop.on == 0) {
                /* Default Layer Bitwise Operation */
                if (!event.pressed) {
                    uint8_t       shift = action.layer_bitop.part * 4;
                    layer_state_t bits  = ((layer_state_t)action.layer_bitop.bits) << shift;
                    layer_state_t mask  = (action.layer_bitop.xbit) ? ~(((layer_state_t)0xf) << shift) : 0;
                    switch (action.layer_bitop.op) {
                        case OP_BIT_AND:
                            default_layer_and(bits | mask);
                            break;
                        case OP_BIT_OR:
                            default_layer_or(bits | mask);
                            break;
                        case OP_BIT_XOR:
                            default_layer_xor(bits | mask);
                            break;
                        case OP_BIT_SET:
                            default_layer_set(bits | mask);
                            break;
                    }
                }
            } else {
                /* Layer Bitwise Operation */
                if (event.pressed ? (action.layer_bitop.on & ON_PRESS) : (action.layer_bitop.on & ON_RELEASE)) {
                    uint8_t       shift = action.layer_bitop.part * 4;
                    layer_state_t bits  = ((layer_state_t)action.layer_bitop.bits) << shift;
                    layer_state_t mask  = (action.layer_bitop.xbit) ? ~(((layer_state_t)0xf) << shift) : 0;
                    switch (action.layer_bitop.op) {
                        case OP_BIT_AND:
                            layer_and(bits | mask);
                            break;
                        case OP_BIT_OR:
                            layer_or(bits | mask);
                            break;
                        case OP_BIT_XOR:
                            layer_xor(bits | mask);
                            break;
                        case OP_BIT_SET:
                            layer_state_set(bits | mask);
                            break;
                    }
                }
            }
            break;
        case ACT_LAYER_MODS:
            if (event.pressed) {
                layer_on(action.layer_mods.layer);
                register_mods(action.layer_mods.mods);
            } else {
                unregister_mods(action.layer_mods.mods);
                layer_off(action.layer_mods.layer);
            }
            break;
#    ifndef NO_ACTION_TAPPING
        case ACT_LAYER_TAP:
        case ACT_LAYER_TAP_EXT:
            switch (action.layer_tap.code) {
                case OP_TAP_TOGGLE:
                    /* tap toggle */
                    if (event.pressed) {
                        if (tap_count < TAPPING_TOGGLE) {
                            layer_invert(action.layer_tap.val);
                        }
                    } else {
                        if (tap_count <= TAPPING_TOGGLE) {
                            layer_invert(action.layer_tap.val);
                        }
                    }
                    break;
                case OP_ON_OFF:
                    event.pressed ? layer_on(action.layer_tap.val) : layer_off(action.layer_tap.val);
                    break;
                case OP_OFF_ON:
                    event.pressed ? layer_off(action.layer_tap.val) : layer_on(action.layer_tap.val);
                    break;
                case OP_SET_CLEAR:
                    event.pressed ? layer_move(action.layer_tap.val) : layer_clear();
                    break;
#        ifndef NO_ACTION_ONESHOT
                case OP_ONESHOT:
                    // Oneshot modifier
#            if defined(ONESHOT_TAP_TOGGLE) && ONESHOT_TAP_TOGGLE > 1
                    do_release_oneshot = false;
                    if (event.pressed) {
                        del_mods(get_oneshot_locked_mods());
                        if (get_oneshot_layer_state() == ONESHOT_TOGGLED) {
                            reset_oneshot_layer();
                            layer_off(action.layer_tap.val);
                            break;
                        } else if (tap_count < ONESHOT_TAP_TOGGLE) {
                            layer_on(action.layer_tap.val);
                            set_oneshot_layer(action.layer_tap.val, ONESHOT_START);
                        }
                    } else {
                        add_mods(get_oneshot_locked_mods());
                        if (tap_count >= ONESHOT_TAP_TOGGLE) {
                            reset_oneshot_layer();
                            clear_oneshot_locked_mods();
                            set_oneshot_layer(action.layer_tap.val, ONESHOT_TOGGLED);
                        } else {
                            clear_oneshot_layer_state(ONESHOT_PRESSED);
                        }
                    }
#            else
                    if (event.pressed) {
                        layer_on(action.layer_tap.val);
                        set_oneshot_layer(action.layer_tap.val, ONESHOT_START);
                    } else {
                        clear_oneshot_layer_state(ONESHOT_PRESSED);
                        if (tap_count > 1) {
                            clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
                        }
                    }
#            endif
                    break;
#        endif
                default:
                    /* tap key */
                    if (event.pressed) {
                        if (tap_count > 0) {
                            dprint("KEYMAP_TAP_KEY: Tap: register_code\n");
                            register_code(action.layer_tap.code);
                        } else {
                            dprint("KEYMAP_TAP_KEY: No tap: On on press\n");
                            layer_on(action.layer_tap.val);
                        }
                    } else {
                        if (tap_count > 0) {
                            dprint("KEYMAP_TAP_KEY: Tap: unregister_code\n");
                            if (action.layer_tap.code == KC_CAPS) {
                                wait_ms(TAP_HOLD_CAPS_DELAY);
                            } else {
                                wait_ms(TAP_CODE_DELAY);
                            }
                            unregister_code(action.layer_tap.code);
                        } else {
                            dprint("KEYMAP_TAP_KEY: No tap: Off on release\n");
                            layer_off(action.layer_tap.val);
                        }
                    }
                    break;
            }
            break;
#    endif
#endif
            /* Extentions */
#ifndef NO_ACTION_MACRO
        case ACT_MACRO:
            action_macro_play(action_get_macro(record, action.func.id, action.func.opt));
            break;
#endif
#if defined(BACKLIGHT_ENABLE) | defined(LED_MATRIX_ENABLE)
        case ACT_BACKLIGHT:
            if (!event.pressed) {
                switch (action.backlight.opt) {
                    case BACKLIGHT_INCREASE:
                        backlight_increase();
                        break;
                    case BACKLIGHT_DECREASE:
                        backlight_decrease();
                        break;
                    case BACKLIGHT_TOGGLE:
                        backlight_toggle();
                        break;
                    case BACKLIGHT_STEP:
                        backlight_step();
                        break;
                    case BACKLIGHT_ON:
                        backlight_level(BACKLIGHT_LEVELS);
                        break;
                    case BACKLIGHT_OFF:
                        backlight_level(0);
                        break;
                }
            }
            break;
#endif
        case ACT_COMMAND:
            break;
#ifdef SWAP_HANDS_ENABLE
        case ACT_SWAP_HANDS:
            switch (action.swap.code) {
                case OP_SH_TOGGLE:
                    if (event.pressed) {
                        swap_hands = !swap_hands;
                    }
                    break;
                case OP_SH_ON_OFF:
                    swap_hands = event.pressed;
                    break;
                case OP_SH_OFF_ON:
                    swap_hands = !event.pressed;
                    break;
                case OP_SH_ON:
                    if (!event.pressed) {
                        swap_hands = true;
                    }
                    break;
                case OP_SH_OFF:
                    if (!event.pressed) {
                        swap_hands = false;
                    }
                    break;
#    ifndef NO_ACTION_TAPPING
                case OP_SH_TAP_TOGGLE:
                    /* tap toggle */

                    if (event.pressed) {
                        if (swap_held) {
                            swap_held = false;
                        } else {
                            swap_hands = !swap_hands;
                        }
                    } else {
                        if (tap_count < TAPPING_TOGGLE) {
                            swap_hands = !swap_hands;
                        }
                    }
                    break;
                default:
                    /* tap key */
                    if (tap_count > 0) {
                        if (swap_held) {
                            swap_hands = !swap_hands;  // undo hold set up in _tap_hint
                            swap_held  = false;
                        }
                        if (event.pressed) {
                            register_code(action.swap.code);
                        } else {
                            wait_ms(TAP_CODE_DELAY);
                            unregister_code(action.swap.code);
                            *record = (keyrecord_t){};  // hack: reset tap mode
                        }
                    } else {
                        if (swap_held && !event.pressed) {
                            swap_hands = !swap_hands;  // undo hold set up in _tap_hint
                            swap_held  = false;
                        }
                    }
#    endif
            }
#endif
#ifndef NO_ACTION_FUNCTION
        case ACT_FUNCTION:
            action_function(record, action.func.id, action.func.opt);
            break;
#endif
        default:
            break;
    }

#ifndef NO_ACTION_LAYER
    // if this event is a layer action, update the leds
    switch (action.kind.id) {
        case ACT_LAYER:
        case ACT_LAYER_MODS:
#    ifndef NO_ACTION_TAPPING
        case ACT_LAYER_TAP:
        case ACT_LAYER_TAP_EXT:
#    endif
            led_set(host_keyboard_leds());
            break;
        default:
            break;
    }
#endif

#ifndef NO_ACTION_TAPPING
#    ifdef RETRO_TAPPING
    if (!is_tap_action(action)) {
        retro_tapping_counter = 0;
    } else {
        if (event.pressed) {
            if (tap_count > 0) {
                retro_tapping_counter = 0;
            } else {
            }
        } else {
            if (tap_count > 0) {
                retro_tapping_counter = 0;
            } else {
                if (retro_tapping_counter == 2) {
                    tap_code(action.layer_tap.code);
                }
                retro_tapping_counter = 0;
            }
        }
    }
#    endif
#endif

#ifndef NO_ACTION_ONESHOT
    /* Because we switch layers after a oneshot event, we need to release the
     * key before we leave the layer or no key up event will be generated.
     */
    if (do_release_oneshot && !(get_oneshot_layer_state() & ONESHOT_PRESSED)) {
        record->event.pressed = false;
        layer_on(get_oneshot_layer());
        process_record(record);
        layer_off(get_oneshot_layer());
    }
#endif
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void register_code(uint8_t code) {
    if (code == KC_NO) {
        return;
    }
#ifdef LOCKING_SUPPORT_ENABLE
    else if (KC_LOCKING_CAPS == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        // Resync: ignore if caps lock already is on
        if (host_keyboard_leds() & (1 << USB_LED_CAPS_LOCK)) return;
#    endif
        add_key(KC_CAPSLOCK);
        send_keyboard_report();
        wait_ms(100);
        del_key(KC_CAPSLOCK);
        send_keyboard_report();
    }

    else if (KC_LOCKING_NUM == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        if (host_keyboard_leds() & (1 << USB_LED_NUM_LOCK)) return;
#    endif
        add_key(KC_NUMLOCK);
        send_keyboard_report();
        wait_ms(100);
        del_key(KC_NUMLOCK);
        send_keyboard_report();
    }

    else if (KC_LOCKING_SCROLL == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        if (host_keyboard_leds() & (1 << USB_LED_SCROLL_LOCK)) return;
#    endif
        add_key(KC_SCROLLLOCK);
        send_keyboard_report();
        wait_ms(100);
        del_key(KC_SCROLLLOCK);
        send_keyboard_report();
    }
#endif

    else if
        IS_KEY(code) {
            // TODO: should push command_proc out of this block?
            if (command_proc(code)) return;

#ifndef NO_ACTION_ONESHOT
/* TODO: remove
        if (oneshot_state.mods && !oneshot_state.disabled) {
            uint8_t tmp_mods = get_mods();
            add_mods(oneshot_state.mods);

            add_key(code);
            send_keyboard_report();

            set_mods(tmp_mods);
            send_keyboard_report();
            oneshot_cancel();
        } else
*/
#endif
            {
                add_key(code);
                send_keyboard_report();
            }
        }
    else if
        IS_MOD(code) {
            add_mods(MOD_BIT(code));
            send_keyboard_report();
        }
    else if
        IS_SYSTEM(code) { host_system_send(KEYCODE2SYSTEM(code)); }
    else if
        IS_CONSUMER(code) { host_consumer_send(KEYCODE2CONSUMER(code)); }

#ifdef MOUSEKEY_ENABLE
    else if
        IS_MOUSEKEY(code) {
            mousekey_on(code);
            mousekey_send();
        }
#endif
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void unregister_code(uint8_t code) {
    if (code == KC_NO) {
        return;
    }
#ifdef LOCKING_SUPPORT_ENABLE
    else if (KC_LOCKING_CAPS == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        // Resync: ignore if caps lock already is off
        if (!(host_keyboard_leds() & (1 << USB_LED_CAPS_LOCK))) return;
#    endif
        add_key(KC_CAPSLOCK);
        send_keyboard_report();
        del_key(KC_CAPSLOCK);
        send_keyboard_report();
    }

    else if (KC_LOCKING_NUM == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        if (!(host_keyboard_leds() & (1 << USB_LED_NUM_LOCK))) return;
#    endif
        add_key(KC_NUMLOCK);
        send_keyboard_report();
        del_key(KC_NUMLOCK);
        send_keyboard_report();
    }

    else if (KC_LOCKING_SCROLL == code) {
#    ifdef LOCKING_RESYNC_ENABLE
        if (!(host_keyboard_leds() & (1 << USB_LED_SCROLL_LOCK))) return;
#    endif
        add_key(KC_SCROLLLOCK);
        send_keyboard_report();
        del_key(KC_SCROLLLOCK);
        send_keyboard_report();
    }
#endif

    else if
        IS_KEY(code) {
            del_key(code);
            send_keyboard_report();
        }
    else if
        IS_MOD(code) {
            del_mods(MOD_BIT(code));
            send_keyboard_report();
        }
    else if
        IS_SYSTEM(code) { host_system_send(0); }
    else if
        IS_CONSUMER(code) { host_consumer_send(0); }
#ifdef MOUSEKEY_ENABLE
    else if
        IS_MOUSEKEY(code) {
            mousekey_off(code);
            mousekey_send();
        }
#endif
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void tap_code(uint8_t code) {
    register_code(code);
    if (code == KC_CAPS) {
        wait_ms(TAP_HOLD_CAPS_DELAY);
    } else {
        wait_ms(TAP_CODE_DELAY);
    }
    unregister_code(code);
}

/** \brief Adds the given physically pressed modifiers and sends a keyboard report immediately.
 *
 * \param mods A bitfield of modifiers to unregister.
 */
void register_mods(uint8_t mods) {
    if (mods) {
        add_mods(mods);
        send_keyboard_report();
    }
}

/** \brief Removes the given physically pressed modifiers and sends a keyboard report immediately.
 *
 * \param mods A bitfield of modifiers to unregister.
 */
void unregister_mods(uint8_t mods) {
    if (mods) {
        del_mods(mods);
        send_keyboard_report();
    }
}

/** \brief Adds the given weak modifiers and sends a keyboard report immediately.
 *
 * \param mods A bitfield of modifiers to register.
 */
void register_weak_mods(uint8_t mods) {
    if (mods) {
        add_weak_mods(mods);
        send_keyboard_report();
    }
}

/** \brief Removes the given weak modifiers and sends a keyboard report immediately.
 *
 * \param mods A bitfield of modifiers to unregister.
 */
void unregister_weak_mods(uint8_t mods) {
    if (mods) {
        del_weak_mods(mods);
        send_keyboard_report();
    }
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void clear_keyboard(void) {
    clear_mods();
    clear_keyboard_but_mods();
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void clear_keyboard_but_mods(void) {
    clear_keys();
    clear_keyboard_but_mods_and_keys();
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void clear_keyboard_but_mods_and_keys() {
    clear_weak_mods();
    clear_macro_mods();
    send_keyboard_report();
#ifdef MOUSEKEY_ENABLE
    mousekey_clear();
    mousekey_send();
#endif
#ifdef EXTRAKEY_ENABLE
    host_system_send(0);
    host_consumer_send(0);
#endif
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
bool is_tap_key(keypos_t key) {
    action_t action = layer_switch_get_action(key);
    return is_tap_action(action);
}

/** \brief Utilities for actions. (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
bool is_tap_action(action_t action) {
    switch (action.kind.id) {
        case ACT_LMODS_TAP:
        case ACT_RMODS_TAP:
        case ACT_LAYER_TAP:
        case ACT_LAYER_TAP_EXT:
            switch (action.layer_tap.code) {
                case KC_NO ... KC_RGUI:
                case OP_TAP_TOGGLE:
                case OP_ONESHOT:
                    return true;
            }
            return false;
        case ACT_SWAP_HANDS:
            switch (action.swap.code) {
                case KC_NO ... KC_RGUI:
                case OP_SH_TAP_TOGGLE:
                    return true;
            }
            return false;
        case ACT_MACRO:
        case ACT_FUNCTION:
            if (action.func.opt & FUNC_TAP) {
                return true;
            }
            return false;
    }
    return false;
}

/** \brief Debug print (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void debug_event(keyevent_t event) { dprintf("%04X%c(%u)", (event.key.row << 8 | event.key.col), (event.pressed ? 'd' : 'u'), event.time); }

/** \brief Debug print (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void debug_record(keyrecord_t record) {
    debug_event(record.event);
#ifndef NO_ACTION_TAPPING
    dprintf(":%u%c", record.tap.count, (record.tap.interrupted ? '-' : ' '));
#endif
}

/** \brief Debug print (FIXME: Needs better description)
 *
 * FIXME: Needs documentation.
 */
void debug_action(action_t action) {
    switch (action.kind.id) {
        case ACT_LMODS:
            dprint("ACT_LMODS");
            break;
        case ACT_RMODS:
            dprint("ACT_RMODS");
            break;
        case ACT_LMODS_TAP:
            dprint("ACT_LMODS_TAP");
            break;
        case ACT_RMODS_TAP:
            dprint("ACT_RMODS_TAP");
            break;
        case ACT_USAGE:
            dprint("ACT_USAGE");
            break;
        case ACT_MOUSEKEY:
            dprint("ACT_MOUSEKEY");
            break;
        case ACT_LAYER:
            dprint("ACT_LAYER");
            break;
        case ACT_LAYER_MODS:
            dprint("ACT_LAYER_MODS");
            break;
        case ACT_LAYER_TAP:
            dprint("ACT_LAYER_TAP");
            break;
        case ACT_LAYER_TAP_EXT:
            dprint("ACT_LAYER_TAP_EXT");
            break;
        case ACT_MACRO:
            dprint("ACT_MACRO");
            break;
        case ACT_COMMAND:
            dprint("ACT_COMMAND");
            break;
        case ACT_FUNCTION:
            dprint("ACT_FUNCTION");
            break;
        case ACT_SWAP_HANDS:
            dprint("ACT_SWAP_HANDS");
            break;
        default:
            dprint("UNKNOWN");
            break;
    }
    dprintf("[%X:%02X]", action.kind.param >> 8, action.kind.param & 0xff);
}