process_combo.c
22098 bytes
1/* Copyright 2016 Jack Humbert
2 *
3 * This program is free software: you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License as published by
5 * the Free Software Foundation, either version 2 of the License, or
6 * (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16
17#include "process_combo.h"
18#include <stddef.h>
19#include "process_auto_shift.h"
20#include "caps_word.h"
21#include "timer.h"
22#include "wait.h"
23#include "keyboard.h"
24#include "keymap_common.h"
25#include "action_layer.h"
26#include "action_tapping.h"
27#include "action_util.h"
28#include "keymap_introspection.h"
29
30__attribute__((weak)) void process_combo_event(uint16_t combo_index, bool pressed) {}
31
32#ifndef COMBO_ONLY_FROM_LAYER
33__attribute__((weak)) uint8_t combo_ref_from_layer(uint8_t layer) {
34 return layer;
35}
36#endif
37
38#ifdef COMBO_MUST_HOLD_PER_COMBO
39__attribute__((weak)) bool get_combo_must_hold(uint16_t combo_index, combo_t *combo) {
40 return false;
41}
42#endif
43
44#ifdef COMBO_MUST_TAP_PER_COMBO
45__attribute__((weak)) bool get_combo_must_tap(uint16_t combo_index, combo_t *combo) {
46 return false;
47}
48#endif
49
50#ifdef COMBO_TERM_PER_COMBO
51__attribute__((weak)) uint16_t get_combo_term(uint16_t combo_index, combo_t *combo) {
52 return COMBO_TERM;
53}
54#endif
55
56#ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
57__attribute__((weak)) bool get_combo_must_press_in_order(uint16_t combo_index, combo_t *combo) {
58 return true;
59}
60#endif
61
62#ifdef COMBO_PROCESS_KEY_RELEASE
63__attribute__((weak)) bool process_combo_key_release(uint16_t combo_index, combo_t *combo, uint8_t key_index, uint16_t keycode) {
64 return false;
65}
66#endif
67
68#ifdef COMBO_PROCESS_KEY_REPRESS
69__attribute__((weak)) bool process_combo_key_repress(uint16_t combo_index, combo_t *combo, uint8_t key_index, uint16_t keycode) {
70 return false;
71}
72#endif
73
74#ifdef COMBO_SHOULD_TRIGGER
75__attribute__((weak)) bool combo_should_trigger(uint16_t combo_index, combo_t *combo, uint16_t keycode, keyrecord_t *record) {
76 return true;
77}
78#endif
79
80typedef enum { COMBO_KEY_NOT_PRESSED, COMBO_KEY_PRESSED, COMBO_KEY_REPRESSED } combo_key_action_t;
81
82#ifndef COMBO_NO_TIMER
83static uint16_t timer = 0;
84#endif
85static bool b_combo_enable = true; // defaults to enabled
86static uint16_t longest_term = 0;
87
88typedef struct {
89 keyrecord_t record;
90 uint16_t combo_index;
91 uint16_t keycode;
92} queued_record_t;
93static uint8_t key_buffer_size = 0;
94static queued_record_t key_buffer[COMBO_KEY_BUFFER_LENGTH];
95
96typedef struct {
97 uint16_t combo_index;
98} queued_combo_t;
99static uint8_t combo_buffer_write = 0;
100static uint8_t combo_buffer_read = 0;
101static queued_combo_t combo_buffer[COMBO_BUFFER_LENGTH];
102
103#define INCREMENT_MOD(i) i = (i + 1) % COMBO_BUFFER_LENGTH
104
105#ifndef EXTRA_SHORT_COMBOS
106/* flags are their own elements in combo_t struct. */
107# define COMBO_ACTIVE(combo) (combo->active)
108# define COMBO_DISABLED(combo) (combo->disabled)
109# define COMBO_STATE(combo) (combo->state)
110
111# define ACTIVATE_COMBO(combo) \
112 do { \
113 combo->active = true; \
114 } while (0)
115# define DEACTIVATE_COMBO(combo) \
116 do { \
117 combo->active = false; \
118 } while (0)
119# define DISABLE_COMBO(combo) \
120 do { \
121 combo->disabled = true; \
122 } while (0)
123# define RESET_COMBO_STATE(combo) \
124 do { \
125 combo->disabled = false; \
126 combo->state = 0; \
127 } while (0)
128#else
129/* flags are at the two high bits of state. */
130# define COMBO_ACTIVE(combo) (combo->state & 0x80)
131# define COMBO_DISABLED(combo) (combo->state & 0x40)
132# define COMBO_STATE(combo) (combo->state & 0x3F)
133
134# define ACTIVATE_COMBO(combo) \
135 do { \
136 combo->state |= 0x80; \
137 } while (0)
138# define DEACTIVATE_COMBO(combo) \
139 do { \
140 combo->state &= ~0x80; \
141 } while (0)
142# define DISABLE_COMBO(combo) \
143 do { \
144 combo->state |= 0x40; \
145 } while (0)
146# define RESET_COMBO_STATE(combo) \
147 do { \
148 combo->state &= ~0x7F; \
149 } while (0)
150#endif
151
152static inline void release_combo(uint16_t combo_index, combo_t *combo) {
153 if (combo->keycode) {
154 keyrecord_t record = {
155 .event = MAKE_COMBOEVENT(false),
156 .keycode = combo->keycode,
157 };
158#ifndef NO_ACTION_TAPPING
159 action_tapping_process(record);
160#else
161 process_record(&record);
162#endif
163 } else {
164 process_combo_event(combo_index, false);
165 }
166 DEACTIVATE_COMBO(combo);
167}
168
169static inline bool _get_combo_must_hold(uint16_t combo_index, combo_t *combo) {
170#ifdef COMBO_NO_TIMER
171 return false;
172#elif defined(COMBO_MUST_HOLD_PER_COMBO)
173 return get_combo_must_hold(combo_index, combo);
174#elif defined(COMBO_MUST_HOLD_MODS)
175 return (KEYCODE_IS_MOD(combo->keycode) || (combo->keycode >= QK_MOMENTARY && combo->keycode <= QK_MOMENTARY_MAX));
176#endif
177 return false;
178}
179
180static inline uint16_t _get_wait_time(uint16_t combo_index, combo_t *combo) {
181 if (_get_combo_must_hold(combo_index, combo)
182#ifdef COMBO_MUST_TAP_PER_COMBO
183 || get_combo_must_tap(combo_index, combo)
184#endif
185 ) {
186 if (longest_term < COMBO_HOLD_TERM) {
187 return COMBO_HOLD_TERM;
188 }
189 }
190
191 return longest_term;
192}
193
194static inline uint16_t _get_combo_term(uint16_t combo_index, combo_t *combo) {
195#if defined(COMBO_TERM_PER_COMBO)
196 return get_combo_term(combo_index, combo);
197#endif
198
199 return COMBO_TERM;
200}
201
202void clear_combos(void) {
203 uint16_t index = 0;
204 longest_term = 0;
205 for (index = 0; index < combo_count(); ++index) {
206 combo_t *combo = combo_get(index);
207 if (!COMBO_ACTIVE(combo)) {
208 RESET_COMBO_STATE(combo);
209 }
210 }
211}
212
213static inline void dump_key_buffer(void) {
214 /* First call start from 0 index; recursive calls need to start from i+1 index */
215 static uint8_t key_buffer_next = 0;
216#if TAP_CODE_DELAY > 0
217 bool delay_done = false;
218#endif
219
220 if (key_buffer_size == 0) {
221 return;
222 }
223
224 for (uint8_t key_buffer_i = key_buffer_next; key_buffer_i < key_buffer_size; key_buffer_i++) {
225 key_buffer_next = key_buffer_i + 1;
226
227 queued_record_t *qrecord = &key_buffer[key_buffer_i];
228 keyrecord_t * record = &qrecord->record;
229
230 if (IS_NOEVENT(record->event)) {
231 continue;
232 }
233
234 if (!record->keycode && qrecord->combo_index != (uint16_t)-1) {
235 process_combo_event(qrecord->combo_index, true);
236 } else {
237#ifndef NO_ACTION_TAPPING
238 action_tapping_process(*record);
239#else
240 process_record(record);
241#endif
242 }
243 record->event.type = TICK_EVENT;
244
245#if defined(CAPS_WORD_ENABLE) && defined(AUTO_SHIFT_ENABLE)
246 // Edge case: preserve the weak Left Shift mod if both Caps Word and
247 // Auto Shift are on. Caps Word capitalizes by setting the weak Left
248 // Shift mod during the press event, but Auto Shift doesn't send the
249 // key until it receives the release event.
250 del_weak_mods((is_caps_word_on() && get_autoshift_state()) ? ~MOD_BIT(KC_LSFT) : 0xff);
251#else
252 clear_weak_mods();
253#endif // defined(CAPS_WORD_ENABLE) && defined(AUTO_SHIFT_ENABLE)
254
255#if TAP_CODE_DELAY > 0
256 // only delay once and for a non-tapping key
257 if (!delay_done && !is_tap_record(record)) {
258 delay_done = true;
259 wait_ms(TAP_CODE_DELAY);
260 }
261#endif
262 }
263
264 key_buffer_next = key_buffer_size = 0;
265}
266
267#define NO_COMBO_KEYS_ARE_DOWN (0 == COMBO_STATE(combo))
268#define ALL_COMBO_KEYS_ARE_DOWN(state, key_count) (((1 << key_count) - 1) == state)
269#define ONLY_ONE_KEY_IS_DOWN(state) !(state & (state - 1))
270#define KEY_NOT_YET_RELEASED(state, key_index) ((1 << key_index) & state)
271#define KEY_STATE_DOWN(state, key_index) \
272 do { \
273 state |= (1 << key_index); \
274 } while (0)
275#define KEY_STATE_UP(state, key_index) \
276 do { \
277 state &= ~(1 << key_index); \
278 } while (0)
279
280static inline void _find_key_index_and_count(const uint16_t *keys, uint16_t keycode, uint16_t *key_index, uint8_t *key_count) {
281 while (true) {
282 uint16_t key = pgm_read_word(&keys[*key_count]);
283 if (keycode == key) *key_index = *key_count;
284 if (COMBO_END == key) break;
285 (*key_count)++;
286 }
287}
288
289void drop_combo_from_buffer(uint16_t combo_index) {
290 /* Mark a combo as processed from the buffer. If the buffer is in the
291 * beginning of the buffer, drop it. */
292 uint8_t i = combo_buffer_read;
293 while (i != combo_buffer_write) {
294 queued_combo_t *qcombo = &combo_buffer[i];
295
296 if (qcombo->combo_index == combo_index) {
297 combo_t *combo = combo_get(combo_index);
298 DISABLE_COMBO(combo);
299
300 if (i == combo_buffer_read) {
301 INCREMENT_MOD(combo_buffer_read);
302 }
303 break;
304 }
305 INCREMENT_MOD(i);
306 }
307}
308
309void apply_combo(uint16_t combo_index, combo_t *combo) {
310 /* Apply combo's result keycode to the last chord key of the combo and
311 * disable the other keys. */
312
313 if (COMBO_DISABLED(combo)) {
314 return;
315 }
316
317 // state to check against so we find the last key of the combo from the buffer
318#if defined(EXTRA_EXTRA_LONG_COMBOS)
319 uint32_t state = 0;
320#elif defined(EXTRA_LONG_COMBOS)
321 uint16_t state = 0;
322#else
323 uint8_t state = 0;
324#endif
325
326 for (uint8_t key_buffer_i = 0; key_buffer_i < key_buffer_size; key_buffer_i++) {
327 queued_record_t *qrecord = &key_buffer[key_buffer_i];
328 keyrecord_t * record = &qrecord->record;
329 uint16_t keycode = qrecord->keycode;
330
331 uint8_t key_count = 0;
332 uint16_t key_index = -1;
333 _find_key_index_and_count(combo->keys, keycode, &key_index, &key_count);
334
335 if (-1 == (int16_t)key_index) {
336 // key not part of this combo
337 continue;
338 }
339
340 KEY_STATE_DOWN(state, key_index);
341 if (ALL_COMBO_KEYS_ARE_DOWN(state, key_count)) {
342 // this in the end executes the combo when the key_buffer is dumped.
343 record->keycode = combo->keycode;
344 record->event.type = COMBO_EVENT;
345 record->event.key = MAKE_KEYPOS(0, 0);
346
347 qrecord->combo_index = combo_index;
348 ACTIVATE_COMBO(combo);
349
350 break;
351 } else {
352 // key was part of the combo but not the last one, "disable" it
353 // by making it a TICK event.
354 record->event.type = TICK_EVENT;
355 }
356 }
357 drop_combo_from_buffer(combo_index);
358}
359
360static inline void apply_combos(void) {
361 // Apply all buffered normal combos.
362 for (uint8_t i = combo_buffer_read; i != combo_buffer_write; INCREMENT_MOD(i)) {
363 queued_combo_t *buffered_combo = &combo_buffer[i];
364 combo_t * combo = combo_get(buffered_combo->combo_index);
365
366#ifdef COMBO_MUST_TAP_PER_COMBO
367 if (get_combo_must_tap(buffered_combo->combo_index, combo)) {
368 // Tap-only combos are applied on key release only, so let's drop 'em here.
369 drop_combo_from_buffer(buffered_combo->combo_index);
370 continue;
371 }
372#endif
373 apply_combo(buffered_combo->combo_index, combo);
374 }
375 dump_key_buffer();
376 clear_combos();
377}
378
379combo_t *overlaps(combo_t *combo1, combo_t *combo2) {
380 /* Checks if the combos overlap and returns the combo that should be
381 * dropped from the combo buffer.
382 * The combo that has less keys will be dropped. If they have the same
383 * amount of keys, drop combo1. */
384
385 uint8_t idx1 = 0, idx2 = 0;
386 uint16_t key1, key2;
387 bool overlaps = false;
388
389 while ((key1 = pgm_read_word(&combo1->keys[idx1])) != COMBO_END) {
390 idx2 = 0;
391 while ((key2 = pgm_read_word(&combo2->keys[idx2])) != COMBO_END) {
392 if (key1 == key2) overlaps = true;
393 idx2 += 1;
394 }
395 idx1 += 1;
396 }
397
398 if (!overlaps) return NULL;
399 if (idx2 < idx1) return combo2;
400 return combo1;
401}
402
403#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
404static bool keys_pressed_in_order(uint16_t combo_index, combo_t *combo, uint16_t key_index, uint16_t keycode, keyrecord_t *record) {
405# ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
406 if (!get_combo_must_press_in_order(combo_index, combo)) {
407 return true;
408 }
409# endif
410 if (
411 // The `state` bit for the key being pressed.
412 (1 << key_index) ==
413 // The *next* combo key's bit.
414 (COMBO_STATE(combo) + 1)
415 // E.g. two keys already pressed: `state == 11`.
416 // Next possible `state` is `111`.
417 // So the needed bit is `100` which we get with `11 + 1`.
418 ) {
419 return true;
420 }
421 return false;
422}
423#endif
424
425static combo_key_action_t process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record, uint16_t combo_index) {
426 uint8_t key_count = 0;
427 uint16_t key_index = -1;
428 _find_key_index_and_count(combo->keys, keycode, &key_index, &key_count);
429
430 /* Continue processing if key isn't part of current combo. */
431 if (-1 == (int16_t)key_index) {
432 return COMBO_KEY_NOT_PRESSED;
433 }
434
435 bool key_is_part_of_combo = (!COMBO_DISABLED(combo) && is_combo_enabled()
436#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
437 && keys_pressed_in_order(combo_index, combo, key_index, keycode, record)
438#endif
439#ifdef COMBO_SHOULD_TRIGGER
440 && combo_should_trigger(combo_index, combo, keycode, record)
441#endif
442 );
443
444 if (record->event.pressed && key_is_part_of_combo) {
445 uint16_t time = _get_combo_term(combo_index, combo);
446 if (!COMBO_ACTIVE(combo)) {
447 KEY_STATE_DOWN(combo->state, key_index);
448 if (longest_term < time) {
449 longest_term = time;
450 }
451 }
452 if (ALL_COMBO_KEYS_ARE_DOWN(COMBO_STATE(combo), key_count)) {
453 /* Combo was fully pressed */
454 /* Buffer the combo so we can fire it after COMBO_TERM */
455
456#ifndef COMBO_NO_TIMER
457 /* Don't buffer this combo if its combo term has passed. */
458 if (timer && timer_elapsed(timer) > time) {
459 DISABLE_COMBO(combo);
460 return COMBO_KEY_PRESSED;
461 } else
462#endif
463 {
464
465 // disable readied combos that overlap with this combo
466 combo_t *drop = NULL;
467 for (uint8_t combo_buffer_i = combo_buffer_read; combo_buffer_i != combo_buffer_write; INCREMENT_MOD(combo_buffer_i)) {
468 queued_combo_t *qcombo = &combo_buffer[combo_buffer_i];
469 combo_t * buffered_combo = combo_get(qcombo->combo_index);
470
471 if ((drop = overlaps(buffered_combo, combo))) {
472 DISABLE_COMBO(drop);
473 if (drop == combo) {
474 // stop checking for overlaps if dropped combo was current combo.
475 break;
476 } else if (combo_buffer_i == combo_buffer_read && drop == buffered_combo) {
477 /* Drop the disabled buffered combo from the buffer if
478 * it is in the beginning of the buffer. */
479 INCREMENT_MOD(combo_buffer_read);
480 }
481 }
482 }
483
484 if (drop != combo) {
485 // save this combo to buffer
486 combo_buffer[combo_buffer_write] = (queued_combo_t){
487 .combo_index = combo_index,
488 };
489 INCREMENT_MOD(combo_buffer_write);
490
491 // get possible longer waiting time for tap-/hold-only combos.
492 longest_term = _get_wait_time(combo_index, combo);
493 }
494 } // if timer elapsed end
495 }
496#ifdef COMBO_PROCESS_KEY_REPRESS
497 } else if (record->event.pressed) {
498 if (COMBO_ACTIVE(combo)) {
499 if (process_combo_key_repress(combo_index, combo, key_index, keycode)) {
500 KEY_STATE_DOWN(combo->state, key_index);
501 return COMBO_KEY_REPRESSED;
502 }
503 }
504#endif
505 } else {
506 // chord releases
507 if (!COMBO_ACTIVE(combo) && ALL_COMBO_KEYS_ARE_DOWN(COMBO_STATE(combo), key_count)) {
508 /* First key quickly released */
509 if (COMBO_DISABLED(combo) || _get_combo_must_hold(combo_index, combo)) {
510 // combo wasn't tappable, disable it and drop it from buffer.
511 drop_combo_from_buffer(combo_index);
512 key_is_part_of_combo = false;
513 }
514#ifdef COMBO_MUST_TAP_PER_COMBO
515 else if (get_combo_must_tap(combo_index, combo)) {
516 // immediately apply tap-only combo
517 apply_combo(combo_index, combo);
518 apply_combos(); // also apply other prepared combos and dump key buffer
519# ifdef COMBO_PROCESS_KEY_RELEASE
520 if (process_combo_key_release(combo_index, combo, key_index, keycode)) {
521 release_combo(combo_index, combo);
522 }
523# endif
524 }
525#endif
526 } else if (COMBO_ACTIVE(combo) && ONLY_ONE_KEY_IS_DOWN(COMBO_STATE(combo)) && KEY_NOT_YET_RELEASED(COMBO_STATE(combo), key_index)) {
527 /* last key released */
528 release_combo(combo_index, combo);
529 key_is_part_of_combo = true;
530
531#ifdef COMBO_PROCESS_KEY_RELEASE
532 process_combo_key_release(combo_index, combo, key_index, keycode);
533#endif
534 } else if (COMBO_ACTIVE(combo) && KEY_NOT_YET_RELEASED(COMBO_STATE(combo), key_index)) {
535 /* first or middle key released */
536 key_is_part_of_combo = true;
537
538#ifdef COMBO_PROCESS_KEY_RELEASE
539 if (process_combo_key_release(combo_index, combo, key_index, keycode)) {
540 release_combo(combo_index, combo);
541 }
542#endif
543 } else {
544 /* The released key was part of an incomplete combo */
545 key_is_part_of_combo = false;
546 }
547
548 KEY_STATE_UP(combo->state, key_index);
549 }
550
551 return key_is_part_of_combo ? COMBO_KEY_PRESSED : COMBO_KEY_NOT_PRESSED;
552}
553
554bool process_combo(uint16_t keycode, keyrecord_t *record) {
555 uint8_t is_combo_key = COMBO_KEY_NOT_PRESSED;
556 bool no_combo_keys_pressed = true;
557
558 if (keycode == QK_COMBO_ON && record->event.pressed) {
559 combo_enable();
560 return true;
561 }
562
563 if (keycode == QK_COMBO_OFF && record->event.pressed) {
564 combo_disable();
565 return true;
566 }
567
568 if (keycode == QK_COMBO_TOGGLE && record->event.pressed) {
569 combo_toggle();
570 return true;
571 }
572
573#ifdef COMBO_ONLY_FROM_LAYER
574 /* Only check keycodes from one layer. */
575 keycode = keymap_key_to_keycode(COMBO_ONLY_FROM_LAYER, record->event.key);
576#else
577 uint8_t highest_layer = get_highest_layer(layer_state | default_layer_state);
578 uint8_t ref_layer = combo_ref_from_layer(highest_layer);
579 if (ref_layer != highest_layer) {
580 keycode = keymap_key_to_keycode(ref_layer, record->event.key);
581 }
582#endif
583
584 for (uint16_t idx = 0; idx < combo_count(); ++idx) {
585 combo_t *combo = combo_get(idx);
586 is_combo_key |= process_single_combo(combo, keycode, record, idx);
587 no_combo_keys_pressed = no_combo_keys_pressed && (NO_COMBO_KEYS_ARE_DOWN || COMBO_ACTIVE(combo) || COMBO_DISABLED(combo));
588 }
589
590 if (record->event.pressed && is_combo_key) {
591#ifndef COMBO_NO_TIMER
592# ifdef COMBO_STRICT_TIMER
593 if (!timer) {
594 // timer is set only on the first key
595 timer = timer_read();
596 }
597# else
598 timer = timer_read();
599# endif
600#endif
601
602#ifdef COMBO_PROCESS_KEY_REPRESS
603 if (is_combo_key == COMBO_KEY_PRESSED)
604#endif
605 {
606 if (key_buffer_size < COMBO_KEY_BUFFER_LENGTH) {
607 key_buffer[key_buffer_size++] = (queued_record_t){
608 .record = *record,
609 .keycode = keycode,
610 .combo_index = -1, // this will be set when applying combos
611 };
612 }
613 }
614 } else {
615 if (combo_buffer_read != combo_buffer_write) {
616 // some combo is prepared
617 apply_combos();
618 } else {
619 // reset state if there are no combo keys pressed at all
620 dump_key_buffer();
621#ifndef COMBO_NO_TIMER
622 timer = 0;
623#endif
624 clear_combos();
625 }
626 }
627 return !is_combo_key;
628}
629
630void combo_task(void) {
631 if (!b_combo_enable) {
632 return;
633 }
634
635#ifndef COMBO_NO_TIMER
636 if (timer && timer_elapsed(timer) > longest_term) {
637 if (combo_buffer_read != combo_buffer_write) {
638 apply_combos();
639 longest_term = 0;
640 timer = 0;
641 } else {
642 dump_key_buffer();
643 timer = 0;
644 clear_combos();
645 }
646 }
647#endif
648}
649
650void combo_enable(void) {
651 b_combo_enable = true;
652}
653
654void combo_disable(void) {
655#ifndef COMBO_NO_TIMER
656 timer = 0;
657#endif
658 b_combo_enable = false;
659 combo_buffer_read = combo_buffer_write;
660 clear_combos();
661 dump_key_buffer();
662}
663
664void combo_toggle(void) {
665 if (b_combo_enable) {
666 combo_disable();
667 } else {
668 combo_enable();
669 }
670}
671
672bool is_combo_enabled(void) {
673 return b_combo_enable;
674}