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
|
#include <stdint.h>
#include <stdbool.h>
#include "action.h"
#include "action_layer.h"
#include "action_tapping.h"
#include "keycode.h"
#include "timer.h"
#ifndef NO_ACTION_TAPPING
# if defined(IGNORE_MOD_TAP_INTERRUPT_PER_KEY)
# error "IGNORE_MOD_TAP_INTERRUPT_PER_KEY has been removed; the code needs to be ported to use HOLD_ON_OTHER_KEY_PRESS_PER_KEY instead."
# elif defined(IGNORE_MOD_TAP_INTERRUPT)
# error "IGNORE_MOD_TAP_INTERRUPT is no longer necessary as it is now the default behavior of mod-tap keys. Please remove it from your config."
# endif
# ifndef COMBO_ENABLE
# define IS_TAPPING_RECORD(r) (KEYEQ(tapping_key.event.key, (r->event.key)))
# else
# define IS_TAPPING_RECORD(r) (KEYEQ(tapping_key.event.key, (r->event.key)) && tapping_key.keycode == r->keycode)
# endif
# define WITHIN_TAPPING_TERM(e) (TIMER_DIFF_16(e.time, tapping_key.event.time) < GET_TAPPING_TERM(get_record_keycode(&tapping_key, false), &tapping_key))
# define WITHIN_QUICK_TAP_TERM(e) (TIMER_DIFF_16(e.time, tapping_key.event.time) < GET_QUICK_TAP_TERM(get_record_keycode(&tapping_key, false), &tapping_key))
# ifdef DYNAMIC_TAPPING_TERM_ENABLE
uint16_t g_tapping_term = TAPPING_TERM;
# endif
# ifdef TAPPING_TERM_PER_KEY
__attribute__((weak)) uint16_t get_tapping_term(uint16_t keycode, keyrecord_t *record) {
# ifdef DYNAMIC_TAPPING_TERM_ENABLE
return g_tapping_term;
# else
return TAPPING_TERM;
# endif
}
# endif
# ifdef QUICK_TAP_TERM_PER_KEY
__attribute__((weak)) uint16_t get_quick_tap_term(uint16_t keycode, keyrecord_t *record) {
return QUICK_TAP_TERM;
}
# endif
# ifdef PERMISSIVE_HOLD_PER_KEY
__attribute__((weak)) bool get_permissive_hold(uint16_t keycode, keyrecord_t *record) {
return false;
}
# endif
# if defined(CHORDAL_HOLD)
extern const char chordal_hold_layout[MATRIX_ROWS][MATRIX_COLS] PROGMEM;
# define REGISTERED_TAPS_SIZE 8
// Array of tap-hold keys that have been settled as tapped but not yet released.
static keypos_t registered_taps[REGISTERED_TAPS_SIZE] = {};
static uint8_t num_registered_taps = 0;
/** Adds `key` to the registered_taps array. */
static void registered_taps_add(keypos_t key);
/** Returns the index of `key` in registered_taps, or -1 if not found. */
static int8_t registered_tap_find(keypos_t key);
/** Removes index `i` from the registered_taps array. */
static void registered_taps_del_index(uint8_t i);
/** Logs the registered_taps array for debugging. */
static void debug_registered_taps(void);
/** \brief Finds which queued events should be held according to Chordal Hold.
*
* In a situation with multiple unsettled tap-hold key presses, scan the queue
* up until the first release, non-tap-hold, or one-shot event and find the
* latest event in the queue that settles as held according to
* get_chordal_hold().
*
* \return Index of the first tap, or equivalently, one past the latest hold.
*/
static uint8_t waiting_buffer_find_chordal_hold_tap(void);
/** Processes queued events up to and including `key` as tapped. */
static void waiting_buffer_chordal_hold_taps_until(keypos_t key);
/** \brief Processes and pops buffered events until the first tap-hold event. */
static void waiting_buffer_process_regular(void);
static bool is_mt_or_lt(uint16_t keycode) {
return IS_QK_MOD_TAP(keycode) || IS_QK_LAYER_TAP(keycode);
}
# endif // CHORDAL_HOLD
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
__attribute__((weak)) bool get_hold_on_other_key_press(uint16_t keycode, keyrecord_t *record) {
return false;
}
# endif
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
# include "process_auto_shift.h"
# endif
static keyrecord_t tapping_key = {};
static keyrecord_t waiting_buffer[WAITING_BUFFER_SIZE] = {};
static uint8_t waiting_buffer_head = 0;
static uint8_t waiting_buffer_tail = 0;
static bool process_tapping(keyrecord_t *record);
static bool waiting_buffer_enq(keyrecord_t record);
static void waiting_buffer_clear(void);
static bool waiting_buffer_typed(keyevent_t event);
static bool waiting_buffer_has_anykey_pressed(void);
static void waiting_buffer_scan_tap(void);
static void debug_tapping_key(void);
static void debug_waiting_buffer(void);
/** \brief Action Tapping Process
*
* FIXME: Needs doc
*/
void action_tapping_process(keyrecord_t record) {
if (process_tapping(&record)) {
if (IS_EVENT(record.event)) {
ac_dprintf("processed: ");
debug_record(record);
ac_dprintf("\n");
}
} else {
if (!waiting_buffer_enq(record)) {
// clear all in case of overflow.
ac_dprintf("OVERFLOW: CLEAR ALL STATES\n");
clear_keyboard();
waiting_buffer_clear();
tapping_key = (keyrecord_t){0};
}
}
// process waiting_buffer
if (IS_EVENT(record.event) && waiting_buffer_head != waiting_buffer_tail) {
ac_dprintf("---- action_exec: process waiting_buffer -----\n");
}
for (; waiting_buffer_tail != waiting_buffer_head; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
if (process_tapping(&waiting_buffer[waiting_buffer_tail])) {
ac_dprintf("processed: waiting_buffer[%u] =", waiting_buffer_tail);
debug_record(waiting_buffer[waiting_buffer_tail]);
ac_dprintf("\n\n");
} else {
break;
}
}
if (IS_EVENT(record.event)) {
ac_dprintf("\n");
}
}
/* Some conditionally defined helper macros to keep process_tapping more
* readable. The conditional definition of tapping_keycode and all the
* conditional uses of it are hidden inside macros named TAP_...
*/
# define TAP_DEFINE_KEYCODE const uint16_t tapping_keycode = get_record_keycode(&tapping_key, false)
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
# ifdef RETRO_TAPPING_PER_KEY
# define TAP_GET_RETRO_TAPPING(keyp) get_auto_shifted_key(tapping_keycode, keyp) && get_retro_tapping(tapping_keycode, &tapping_key)
# else
# define TAP_GET_RETRO_TAPPING(keyp) get_auto_shifted_key(tapping_keycode, keyp)
# endif
/* Used to extend TAPPING_TERM:
* indefinitely if RETRO_SHIFT does not have a value
* to RETRO_SHIFT if RETRO_SHIFT is set
* for possibly retro shifted keys.
*/
# define MAYBE_RETRO_SHIFTING(ev, keyp) (get_auto_shifted_key(tapping_keycode, keyp) && TAP_GET_RETRO_TAPPING(keyp) && ((RETRO_SHIFT + 0) == 0 || TIMER_DIFF_16((ev).time, tapping_key.event.time) < (RETRO_SHIFT + 0)))
# define TAP_IS_LT IS_QK_LAYER_TAP(tapping_keycode)
# define TAP_IS_MT IS_QK_MOD_TAP(tapping_keycode)
# define TAP_IS_RETRO IS_RETRO(tapping_keycode)
# else
# define TAP_GET_RETRO_TAPPING(keyp) false
# define MAYBE_RETRO_SHIFTING(ev, kp) false
# define TAP_IS_LT false
# define TAP_IS_MT false
# define TAP_IS_RETRO false
# endif
# ifdef PERMISSIVE_HOLD_PER_KEY
# define TAP_GET_PERMISSIVE_HOLD get_permissive_hold(tapping_keycode, &tapping_key)
# elif defined(PERMISSIVE_HOLD)
# define TAP_GET_PERMISSIVE_HOLD true
# else
# define TAP_GET_PERMISSIVE_HOLD false
# endif
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS get_hold_on_other_key_press(tapping_keycode, &tapping_key)
# elif defined(HOLD_ON_OTHER_KEY_PRESS)
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS true
# else
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS false
# endif
/** \brief Tapping
*
* Rule: Tap key is typed(pressed and released) within TAPPING_TERM.
* (without interfering by typing other key)
*/
/* return true when key event is processed or consumed. */
bool process_tapping(keyrecord_t *keyp) {
const keyevent_t event = keyp->event;
# if defined(CHORDAL_HOLD)
if (!event.pressed) {
const int8_t i = registered_tap_find(event.key);
if (i != -1) {
// If a tap-hold key was previously settled as tapped, set its
// tap.count correspondingly on release.
keyp->tap.count = 1;
registered_taps_del_index(i);
ac_dprintf("Found tap release for [%d]\n", i);
debug_registered_taps();
}
}
# endif // CHORDAL_HOLD
// state machine is in the "reset" state, no tapping key is to be
// processed
if (IS_NOEVENT(tapping_key.event)) {
if (!IS_EVENT(event)) {
// early return for tick events
} else if (event.pressed && is_tap_record(keyp)) {
// the currently pressed key is a tapping key, therefore transition
// into the "pressed" tapping key state
ac_dprintf("Tapping: Start(Press tap key).\n");
tapping_key = *keyp;
process_record_tap_hint(&tapping_key);
waiting_buffer_scan_tap();
debug_tapping_key();
} else {
// the current key is just a regular key, pass it on for regular
// processing
process_record(keyp);
}
return true;
}
# if (defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)) || defined(PERMISSIVE_HOLD_PER_KEY) || defined(CHORDAL_HOLD) || defined(HOLD_ON_OTHER_KEY_PRESS_PER_KEY)
TAP_DEFINE_KEYCODE;
# endif
// process "pressed" tapping key state
if (tapping_key.event.pressed) {
if (WITHIN_TAPPING_TERM(event) || MAYBE_RETRO_SHIFTING(event, keyp)) {
if (IS_NOEVENT(event)) {
// early return for tick events
return true;
}
if (tapping_key.tap.count == 0) {
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
// first tap!
ac_dprintf("Tapping: First tap(0->1).\n");
tapping_key.tap.count = 1;
debug_tapping_key();
process_record(&tapping_key);
// copy tapping state
keyp->tap = tapping_key.tap;
// enqueue
return false;
}
# if defined(CHORDAL_HOLD)
else if (is_mt_or_lt(tapping_keycode) && !event.pressed && waiting_buffer_typed(event) && !get_chordal_hold(tapping_keycode, &tapping_key, get_record_keycode(keyp, false), keyp)) {
// Key release that is not a chord with the tapping key.
// Settle the tapping key and any other pending tap-hold
// keys preceding the press of this key as tapped.
ac_dprintf("Tapping: End. Chord considered a tap\n");
tapping_key.tap.count = 1;
registered_taps_add(tapping_key.event.key);
process_record(&tapping_key);
tapping_key = (keyrecord_t){0};
waiting_buffer_chordal_hold_taps_until(event.key);
debug_registered_taps();
debug_waiting_buffer();
// enqueue
return false;
}
# endif // CHORDAL_HOLD
/* Process a key typed within TAPPING_TERM
* This can register the key before settlement of tapping,
* useful for long TAPPING_TERM but may prevent fast typing.
*/
// clang-format off
else if (
!event.pressed && waiting_buffer_typed(event) &&
(
TAP_GET_PERMISSIVE_HOLD ||
// Causes nested taps to not wait past TAPPING_TERM/RETRO_SHIFT
// unnecessarily and fixes them for Layer Taps.
TAP_GET_RETRO_TAPPING(keyp)
)
) {
// clang-format on
ac_dprintf("Tapping: End. No tap. Interfered by typing key\n");
process_record(&tapping_key);
# if defined(CHORDAL_HOLD)
uint8_t first_tap = waiting_buffer_find_chordal_hold_tap();
ac_dprintf("first_tap = %u\n", first_tap);
if (first_tap < WAITING_BUFFER_SIZE) {
for (; waiting_buffer_tail != first_tap; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
ac_dprintf("Processing [%u]\n", waiting_buffer_tail);
process_record(&waiting_buffer[waiting_buffer_tail]);
}
}
waiting_buffer_chordal_hold_taps_until(event.key);
debug_registered_taps();
debug_waiting_buffer();
# endif // CHORDAL_HOLD
tapping_key = (keyrecord_t){0};
debug_tapping_key();
// enqueue
return false;
}
/* Process release event of a key pressed before tapping starts
* Without this unexpected repeating will occur with having fast repeating setting
* https://github.com/tmk/tmk_keyboard/issues/60
*
* NOTE: This workaround causes events to process out of order,
* e.g. in a rolled press of three tap-hold keys like
*
* "A down, B down, C down, A up, B up, C up"
*
* events are processed as
*
* "A down, B down, A up, B up, C down, C up"
*
* It seems incorrect to process keyp before the tapping key.
* This workaround is old, from 2013. This might no longer
* be needed for the original problem it was meant to address.
*/
else if (!event.pressed && !waiting_buffer_typed(event)) {
// Modifier/Layer should be retained till end of this tapping.
action_t action = layer_switch_get_action(event.key);
switch (action.kind.id) {
case ACT_LMODS:
case ACT_RMODS:
if (action.key.mods && !action.key.code) return false;
if (IS_MODIFIER_KEYCODE(action.key.code)) return false;
break;
case ACT_LMODS_TAP:
case ACT_RMODS_TAP:
if (action.key.mods && keyp->tap.count == 0) return false;
if (IS_MODIFIER_KEYCODE(action.key.code)) return false;
break;
case ACT_LAYER_TAP:
case ACT_LAYER_TAP_EXT:
switch (action.layer_tap.code) {
case 0 ...(OP_TAP_TOGGLE - 1):
case OP_ON_OFF:
case OP_OFF_ON:
case OP_SET_CLEAR:
return false;
}
break;
}
// Release of key should be process immediately.
ac_dprintf("Tapping: release event of a key pressed before tapping\n");
process_record(keyp);
return true;
} else {
// set interrupted flag when other key pressed during tapping
if (event.pressed) {
tapping_key.tap.interrupted = true;
# if defined(CHORDAL_HOLD)
if (is_mt_or_lt(tapping_keycode) && !get_chordal_hold(tapping_keycode, &tapping_key, get_record_keycode(keyp, false), keyp)) {
// In process_action(), HOLD_ON_OTHER_KEY_PRESS
// will revert interrupted events to holds, so
// this needs to be set false.
tapping_key.tap.interrupted = false;
if (!is_tap_record(keyp)) {
ac_dprintf("Tapping: End. Chord considered a tap\n");
tapping_key.tap.count = 1;
registered_taps_add(tapping_key.event.key);
debug_registered_taps();
process_record(&tapping_key);
tapping_key = (keyrecord_t){0};
}
} else
# endif // CHORDAL_HOLD
if (TAP_GET_HOLD_ON_OTHER_KEY_PRESS
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
// Auto Shift cannot evaluate this early
// Retro Shift uses the hold action for all nested taps even without HOLD_ON_OTHER_KEY_PRESS, so this is fine to skip
&& !(MAYBE_RETRO_SHIFTING(event, keyp) && get_auto_shifted_key(get_record_keycode(keyp, false), keyp))
# endif
) {
// Settle the tapping key as *held*, since
// HOLD_ON_OTHER_KEY_PRESS is enabled for this key.
ac_dprintf("Tapping: End. No tap. Interfered by pressed key\n");
process_record(&tapping_key);
# if defined(CHORDAL_HOLD)
if (waiting_buffer_tail != waiting_buffer_head && is_tap_record(&waiting_buffer[waiting_buffer_tail])) {
tapping_key = waiting_buffer[waiting_buffer_tail];
// Pop tail from the queue.
waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE;
debug_waiting_buffer();
} else
# endif // CHORDAL_HOLD
{
tapping_key = (keyrecord_t){0};
}
debug_tapping_key();
# if defined(CHORDAL_HOLD)
waiting_buffer_process_regular();
# endif // CHORDAL_HOLD
}
}
// enqueue
return false;
}
}
// tap_count > 0
else {
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
ac_dprintf("Tapping: Tap release(%u)\n", tapping_key.tap.count);
keyp->tap = tapping_key.tap;
process_record(keyp);
tapping_key = *keyp;
debug_tapping_key();
return true;
} else if (is_tap_record(keyp) && event.pressed) {
if (tapping_key.tap.count > 1) {
ac_dprintf("Tapping: Start new tap with releasing last tap(>1).\n");
// unregister key
process_record(&(keyrecord_t){
.tap = tapping_key.tap,
.event.key = tapping_key.event.key,
.event.time = event.time,
.event.pressed = false,
.event.type = tapping_key.event.type,
# ifdef COMBO_ENABLE
.keycode = tapping_key.keycode,
# endif
});
} else {
ac_dprintf("Tapping: Start while last tap(1).\n");
}
tapping_key = *keyp;
waiting_buffer_scan_tap();
debug_tapping_key();
return true;
} else {
ac_dprintf("Tapping: key event while last tap(>0).\n");
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
retroshift_swap_times();
# endif
process_record(keyp);
return true;
}
}
}
// after TAPPING_TERM
else {
if (tapping_key.tap.count == 0) {
ac_dprintf("Tapping: End. Timeout. Not tap(0): ");
debug_event(event);
ac_dprintf("\n");
process_record(&tapping_key);
tapping_key = (keyrecord_t){0};
debug_tapping_key();
return false;
} else {
if (IS_NOEVENT(event)) {
return true;
}
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
ac_dprintf("Tapping: End. last timeout tap release(>0).");
keyp->tap = tapping_key.tap;
process_record(keyp);
tapping_key = (keyrecord_t){0};
return true;
} else if (is_tap_record(keyp) && event.pressed) {
if (tapping_key.tap.count > 1) {
ac_dprintf("Tapping: Start new tap with releasing last timeout tap(>1).\n");
// unregister key
process_record(&(keyrecord_t){
.tap = tapping_key.tap,
.event.key = tapping_key.event.key,
.event.time = event.time,
.event.pressed = false,
.event.type = tapping_key.event.type,
# ifdef COMBO_ENABLE
.keycode = tapping_key.keycode,
# endif
});
} else {
ac_dprintf("Tapping: Start while last timeout tap(1).\n");
}
tapping_key = *keyp;
waiting_buffer_scan_tap();
debug_tapping_key();
return true;
} else {
ac_dprintf("Tapping: key event while last timeout tap(>0).\n");
process_record(keyp);
return true;
}
}
}
}
// process "released" tapping key state
else {
if (WITHIN_TAPPING_TERM(event) || MAYBE_RETRO_SHIFTING(event, keyp)) {
if (IS_NOEVENT(event)) {
// early return for tick events
return true;
}
if (event.pressed) {
if (IS_TAPPING_RECORD(keyp)) {
if (WITHIN_QUICK_TAP_TERM(event) && !tapping_key.tap.interrupted && tapping_key.tap.count > 0) {
// sequential tap.
keyp->tap = tapping_key.tap;
if (keyp->tap.count < 15) keyp->tap.count += 1;
ac_dprintf("Tapping: Tap press(%u)\n", keyp->tap.count);
process_record(keyp);
tapping_key = *keyp;
debug_tapping_key();
return true;
}
// FIX: start new tap again
tapping_key = *keyp;
return true;
} else if (is_tap_record(keyp)) {
// Sequential tap can be interfered with other tap key.
ac_dprintf("Tapping: Start with interfering other tap.\n");
tapping_key = *keyp;
waiting_buffer_scan_tap();
debug_tapping_key();
return true;
} else {
// should none in buffer
// FIX: interrupted when other key is pressed
tapping_key.tap.interrupted = true;
process_record(keyp);
return true;
}
} else {
ac_dprintf("Tapping: other key just after tap.\n");
process_record(keyp);
return true;
}
} else {
// Timeout - reset state machine.
ac_dprintf("Tapping: End(Timeout after releasing last tap): ");
debug_event(event);
ac_dprintf("\n");
tapping_key = (keyrecord_t){0};
debug_tapping_key();
return false;
}
}
}
/** \brief Waiting buffer enq
*
* FIXME: Needs docs
*/
bool waiting_buffer_enq(keyrecord_t record) {
if (IS_NOEVENT(record.event)) {
return true;
}
if ((waiting_buffer_head + 1) % WAITING_BUFFER_SIZE == waiting_buffer_tail) {
ac_dprintf("waiting_buffer_enq: Over flow.\n");
return false;
}
waiting_buffer[waiting_buffer_head] = record;
waiting_buffer_head = (waiting_buffer_head + 1) % WAITING_BUFFER_SIZE;
ac_dprintf("waiting_buffer_enq: ");
debug_waiting_buffer();
return true;
}
/** \brief Waiting buffer clear
*
* FIXME: Needs docs
*/
void waiting_buffer_clear(void) {
waiting_buffer_head = 0;
waiting_buffer_tail = 0;
}
/** \brief Waiting buffer typed
*
* FIXME: Needs docs
*/
bool waiting_buffer_typed(keyevent_t event) {
for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
if (KEYEQ(event.key, waiting_buffer[i].event.key) && event.pressed != waiting_buffer[i].event.pressed) {
return true;
}
}
return false;
}
/** \brief Waiting buffer has anykey pressed
*
* FIXME: Needs docs
*/
__attribute__((unused)) bool waiting_buffer_has_anykey_pressed(void) {
for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
if (waiting_buffer[i].event.pressed) return true;
}
return false;
}
/** \brief Scan buffer for tapping
*
* FIXME: Needs docs
*/
void waiting_buffer_scan_tap(void) {
// early return if:
// - tapping already is settled
// - invalid state: tapping_key released && tap.count == 0
if ((tapping_key.tap.count > 0) || !tapping_key.event.pressed) {
return;
}
# if (defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT))
TAP_DEFINE_KEYCODE;
# endif
for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
keyrecord_t *candidate = &waiting_buffer[i];
// clang-format off
if (IS_EVENT(candidate->event) && KEYEQ(candidate->event.key, tapping_key.event.key) && !candidate->event.pressed && (
WITHIN_TAPPING_TERM(waiting_buffer[i].event) || MAYBE_RETRO_SHIFTING(waiting_buffer[i].event, &tapping_key)
)) {
// clang-format on
tapping_key.tap.count = 1;
candidate->tap.count = 1;
process_record(&tapping_key);
ac_dprintf("waiting_buffer_scan_tap: found at [%u]\n", i);
debug_waiting_buffer();
return;
}
}
}
# ifdef CHORDAL_HOLD
__attribute__((weak)) bool get_chordal_hold(uint16_t tap_hold_keycode, keyrecord_t *tap_hold_record, uint16_t other_keycode, keyrecord_t *other_record) {
return get_chordal_hold_default(tap_hold_record, other_record);
}
bool get_chordal_hold_default(keyrecord_t *tap_hold_record, keyrecord_t *other_record) {
if (tap_hold_record->event.type != KEY_EVENT || other_record->event.type != KEY_EVENT) {
return true; // Return true on combos or other non-key events.
}
char tap_hold_hand = chordal_hold_handedness(tap_hold_record->event.key);
if (tap_hold_hand == '*') {
return true;
}
char other_hand = chordal_hold_handedness(other_record->event.key);
return other_hand == '*' || tap_hold_hand != other_hand;
}
__attribute__((weak)) char chordal_hold_handedness(keypos_t key) {
return (char)pgm_read_byte(&chordal_hold_layout[key.row][key.col]);
}
static void registered_taps_add(keypos_t key) {
if (num_registered_taps >= REGISTERED_TAPS_SIZE) {
ac_dprintf("TAPS OVERFLOW: CLEAR ALL STATES\n");
clear_keyboard();
num_registered_taps = 0;
}
registered_taps[num_registered_taps] = key;
++num_registered_taps;
}
static int8_t registered_tap_find(keypos_t key) {
for (int8_t i = 0; i < num_registered_taps; ++i) {
if (KEYEQ(registered_taps[i], key)) {
return i;
}
}
return -1;
}
static void registered_taps_del_index(uint8_t i) {
if (i < num_registered_taps) {
--num_registered_taps;
if (i < num_registered_taps) {
registered_taps[i] = registered_taps[num_registered_taps];
}
}
}
static void debug_registered_taps(void) {
ac_dprintf("registered_taps = { ");
for (int8_t i = 0; i < num_registered_taps; ++i) {
ac_dprintf("%02X%02X ", registered_taps[i].row, registered_taps[i].col);
}
ac_dprintf("}\n");
}
static uint8_t waiting_buffer_find_chordal_hold_tap(void) {
keyrecord_t *prev = &tapping_key;
uint16_t prev_keycode = get_record_keycode(&tapping_key, false);
uint8_t first_tap = WAITING_BUFFER_SIZE;
for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
keyrecord_t * cur = &waiting_buffer[i];
const uint16_t cur_keycode = get_record_keycode(cur, false);
if (!cur->event.pressed || !is_mt_or_lt(prev_keycode)) {
break;
} else if (get_chordal_hold(prev_keycode, prev, cur_keycode, cur)) {
first_tap = i; // Track one index past the latest hold.
}
prev = cur;
prev_keycode = cur_keycode;
}
return first_tap;
}
static void waiting_buffer_chordal_hold_taps_until(keypos_t key) {
while (waiting_buffer_tail != waiting_buffer_head) {
keyrecord_t *record = &waiting_buffer[waiting_buffer_tail];
ac_dprintf("waiting_buffer_chordal_hold_taps_until: processing [%u]\n", waiting_buffer_tail);
if (is_tap_record(record)) {
record->tap.count = 1;
registered_taps_add(record->event.key);
}
process_record(record);
waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE;
if (KEYEQ(key, record->event.key) && record->event.pressed) {
break;
}
}
}
static void waiting_buffer_process_regular(void) {
for (; waiting_buffer_tail != waiting_buffer_head; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
if (is_tap_record(&waiting_buffer[waiting_buffer_tail])) {
break; // Stop once a tap-hold key event is reached.
}
ac_dprintf("waiting_buffer_process_regular: processing [%u]\n", waiting_buffer_tail);
process_record(&waiting_buffer[waiting_buffer_tail]);
}
debug_waiting_buffer();
}
# endif // CHORDAL_HOLD
/** \brief Logs tapping key if ACTION_DEBUG is enabled. */
static void debug_tapping_key(void) {
ac_dprintf("TAPPING_KEY=");
debug_record(tapping_key);
ac_dprintf("\n");
}
/** \brief Logs waiting buffer if ACTION_DEBUG is enabled. */
static void debug_waiting_buffer(void) {
ac_dprintf("{");
for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
ac_dprintf(" [%u]=", i);
debug_record(waiting_buffer[i]);
}
ac_dprintf("}\n");
}
#endif
|