608 lines
20 KiB
C
608 lines
20 KiB
C
/* Copyright 2016 Jack Humbert
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "print.h"
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#include "process_combo.h"
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#include "action_tapping.h"
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#ifdef COMBO_COUNT
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__attribute__((weak)) combo_t key_combos[COMBO_COUNT];
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uint16_t COMBO_LEN = COMBO_COUNT;
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#else
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extern combo_t key_combos[];
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extern uint16_t COMBO_LEN;
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#endif
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__attribute__((weak)) void process_combo_event(uint16_t combo_index, bool pressed) {}
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#ifdef COMBO_MUST_HOLD_PER_COMBO
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__attribute__((weak)) bool get_combo_must_hold(uint16_t index, combo_t *combo) { return false; }
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#endif
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#ifdef COMBO_MUST_TAP_PER_COMBO
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__attribute__((weak)) bool get_combo_must_tap(uint16_t index, combo_t *combo) { return false; }
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#endif
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#ifdef COMBO_TERM_PER_COMBO
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__attribute__((weak)) uint16_t get_combo_term(uint16_t index, combo_t *combo) { return COMBO_TERM; }
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#endif
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#ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
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__attribute__((weak)) bool get_combo_must_press_in_order(uint16_t combo_index, combo_t *combo) { return true; }
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#endif
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#ifdef COMBO_PROCESS_KEY_RELEASE
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__attribute__((weak)) bool process_combo_key_release(uint16_t combo_index, combo_t *combo, uint8_t key_index, uint16_t keycode) { return false; }
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#endif
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#ifdef COMBO_SHOULD_TRIGGER
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__attribute__((weak)) bool combo_should_trigger(uint16_t combo_index, combo_t *combo, uint16_t keycode, keyrecord_t *record) { return true; }
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#endif
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#ifndef COMBO_NO_TIMER
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static uint16_t timer = 0;
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#endif
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static bool b_combo_enable = true; // defaults to enabled
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static uint16_t longest_term = 0;
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typedef struct {
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keyrecord_t record;
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uint16_t combo_index;
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uint16_t keycode;
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} queued_record_t;
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static uint8_t key_buffer_size = 0;
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static queued_record_t key_buffer[COMBO_KEY_BUFFER_LENGTH];
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typedef struct {
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uint16_t combo_index;
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} queued_combo_t;
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static uint8_t combo_buffer_write = 0;
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static uint8_t combo_buffer_read = 0;
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static queued_combo_t combo_buffer[COMBO_BUFFER_LENGTH];
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#define INCREMENT_MOD(i) i = (i + 1) % COMBO_BUFFER_LENGTH
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#define COMBO_KEY_POS ((keypos_t){.col = 254, .row = 254})
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#ifndef EXTRA_SHORT_COMBOS
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/* flags are their own elements in combo_t struct. */
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# define COMBO_ACTIVE(combo) (combo->active)
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# define COMBO_DISABLED(combo) (combo->disabled)
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# define COMBO_STATE(combo) (combo->state)
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# define ACTIVATE_COMBO(combo) \
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do { \
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combo->active = true; \
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} while (0)
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# define DEACTIVATE_COMBO(combo) \
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do { \
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combo->active = false; \
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} while (0)
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# define DISABLE_COMBO(combo) \
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do { \
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combo->disabled = true; \
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} while (0)
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# define RESET_COMBO_STATE(combo) \
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do { \
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combo->disabled = false; \
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combo->state = 0; \
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} while (0)
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#else
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/* flags are at the two high bits of state. */
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# define COMBO_ACTIVE(combo) (combo->state & 0x80)
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# define COMBO_DISABLED(combo) (combo->state & 0x40)
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# define COMBO_STATE(combo) (combo->state & 0x3F)
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# define ACTIVATE_COMBO(combo) \
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do { \
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combo->state |= 0x80; \
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} while (0)
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# define DEACTIVATE_COMBO(combo) \
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do { \
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combo->state &= ~0x80; \
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} while (0)
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# define DISABLE_COMBO(combo) \
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do { \
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combo->state |= 0x40; \
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} while (0)
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# define RESET_COMBO_STATE(combo) \
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do { \
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combo->state &= ~0x7F; \
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} while (0)
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#endif
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static inline void release_combo(uint16_t combo_index, combo_t *combo) {
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if (combo->keycode) {
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keyrecord_t record = {
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.event =
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{
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.key = COMBO_KEY_POS,
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.time = timer_read() | 1,
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.pressed = false,
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},
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.keycode = combo->keycode,
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};
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#ifndef NO_ACTION_TAPPING
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action_tapping_process(record);
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#else
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process_record(&record);
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#endif
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} else {
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process_combo_event(combo_index, false);
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}
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DEACTIVATE_COMBO(combo);
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}
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static inline bool _get_combo_must_hold(uint16_t combo_index, combo_t *combo) {
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#ifdef COMBO_NO_TIMER
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return false;
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#elif defined(COMBO_MUST_HOLD_PER_COMBO)
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return get_combo_must_hold(combo_index, combo);
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#elif defined(COMBO_MUST_HOLD_MODS)
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return (KEYCODE_IS_MOD(combo->keycode) || (combo->keycode >= QK_MOMENTARY && combo->keycode <= QK_MOMENTARY_MAX));
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#endif
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return false;
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}
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static inline uint16_t _get_wait_time(uint16_t combo_index, combo_t *combo) {
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if (_get_combo_must_hold(combo_index, combo)
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#ifdef COMBO_MUST_TAP_PER_COMBO
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|| get_combo_must_tap(combo_index, combo)
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#endif
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) {
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if (longest_term < COMBO_HOLD_TERM) {
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return COMBO_HOLD_TERM;
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}
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}
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return longest_term;
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}
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static inline uint16_t _get_combo_term(uint16_t combo_index, combo_t *combo) {
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#if defined(COMBO_TERM_PER_COMBO)
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return get_combo_term(combo_index, combo);
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#endif
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return COMBO_TERM;
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}
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void clear_combos(void) {
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uint16_t index = 0;
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longest_term = 0;
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for (index = 0; index < COMBO_LEN; ++index) {
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combo_t *combo = &key_combos[index];
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if (!COMBO_ACTIVE(combo)) {
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RESET_COMBO_STATE(combo);
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}
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}
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}
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static inline void dump_key_buffer(void) {
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/* First call start from 0 index; recursive calls need to start from i+1 index */
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static uint8_t key_buffer_next = 0;
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if (key_buffer_size == 0) {
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return;
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}
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for (uint8_t key_buffer_i = key_buffer_next; key_buffer_i < key_buffer_size; key_buffer_i++) {
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key_buffer_next = key_buffer_i + 1;
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queued_record_t *qrecord = &key_buffer[key_buffer_i];
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keyrecord_t * record = &qrecord->record;
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if (IS_NOEVENT(record->event)) {
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continue;
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}
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if (!record->keycode && qrecord->combo_index != (uint16_t)-1) {
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process_combo_event(qrecord->combo_index, true);
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} else {
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#ifndef NO_ACTION_TAPPING
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action_tapping_process(*record);
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#else
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process_record(record);
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#endif
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}
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record->event.time = 0;
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}
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key_buffer_next = key_buffer_size = 0;
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}
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#define NO_COMBO_KEYS_ARE_DOWN (0 == COMBO_STATE(combo))
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#define ALL_COMBO_KEYS_ARE_DOWN(state, key_count) (((1 << key_count) - 1) == state)
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#define ONLY_ONE_KEY_IS_DOWN(state) !(state & (state - 1))
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#define KEY_NOT_YET_RELEASED(state, key_index) ((1 << key_index) & state)
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#define KEY_STATE_DOWN(state, key_index) \
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do { \
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state |= (1 << key_index); \
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} while (0)
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#define KEY_STATE_UP(state, key_index) \
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do { \
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state &= ~(1 << key_index); \
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} while (0)
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static inline void _find_key_index_and_count(const uint16_t *keys, uint16_t keycode, uint16_t *key_index, uint8_t *key_count) {
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while (true) {
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uint16_t key = pgm_read_word(&keys[*key_count]);
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if (keycode == key) *key_index = *key_count;
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if (COMBO_END == key) break;
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(*key_count)++;
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}
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}
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void drop_combo_from_buffer(uint16_t combo_index) {
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/* Mark a combo as processed from the buffer. If the buffer is in the
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* beginning of the buffer, drop it. */
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uint8_t i = combo_buffer_read;
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while (i != combo_buffer_write) {
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queued_combo_t *qcombo = &combo_buffer[i];
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if (qcombo->combo_index == combo_index) {
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combo_t *combo = &key_combos[combo_index];
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DISABLE_COMBO(combo);
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if (i == combo_buffer_read) {
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INCREMENT_MOD(combo_buffer_read);
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}
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break;
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}
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INCREMENT_MOD(i);
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}
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}
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void apply_combo(uint16_t combo_index, combo_t *combo) {
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/* Apply combo's result keycode to the last chord key of the combo and
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* disable the other keys. */
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if (COMBO_DISABLED(combo)) {
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return;
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}
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// state to check against so we find the last key of the combo from the buffer
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#if defined(EXTRA_EXTRA_LONG_COMBOS)
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uint32_t state = 0;
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#elif defined(EXTRA_LONG_COMBOS)
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uint16_t state = 0;
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#else
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uint8_t state = 0;
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#endif
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for (uint8_t key_buffer_i = 0; key_buffer_i < key_buffer_size; key_buffer_i++) {
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queued_record_t *qrecord = &key_buffer[key_buffer_i];
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keyrecord_t * record = &qrecord->record;
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uint16_t keycode = qrecord->keycode;
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uint8_t key_count = 0;
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uint16_t key_index = -1;
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_find_key_index_and_count(combo->keys, keycode, &key_index, &key_count);
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if (-1 == (int16_t)key_index) {
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// key not part of this combo
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continue;
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}
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KEY_STATE_DOWN(state, key_index);
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if (ALL_COMBO_KEYS_ARE_DOWN(state, key_count)) {
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// this in the end executes the combo when the key_buffer is dumped.
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record->keycode = combo->keycode;
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record->event.key = COMBO_KEY_POS;
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qrecord->combo_index = combo_index;
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ACTIVATE_COMBO(combo);
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break;
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} else {
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// key was part of the combo but not the last one, "disable" it
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// by making it a TICK event.
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record->event.time = 0;
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}
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}
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drop_combo_from_buffer(combo_index);
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}
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static inline void apply_combos(void) {
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// Apply all buffered normal combos.
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for (uint8_t i = combo_buffer_read; i != combo_buffer_write; INCREMENT_MOD(i)) {
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queued_combo_t *buffered_combo = &combo_buffer[i];
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combo_t * combo = &key_combos[buffered_combo->combo_index];
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#ifdef COMBO_MUST_TAP_PER_COMBO
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if (get_combo_must_tap(buffered_combo->combo_index, combo)) {
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// Tap-only combos are applied on key release only, so let's drop 'em here.
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drop_combo_from_buffer(buffered_combo->combo_index);
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continue;
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}
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#endif
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apply_combo(buffered_combo->combo_index, combo);
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}
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dump_key_buffer();
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clear_combos();
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}
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combo_t *overlaps(combo_t *combo1, combo_t *combo2) {
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/* Checks if the combos overlap and returns the combo that should be
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* dropped from the combo buffer.
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* The combo that has less keys will be dropped. If they have the same
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* amount of keys, drop combo1. */
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uint8_t idx1 = 0, idx2 = 0;
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uint16_t key1, key2;
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bool overlaps = false;
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while ((key1 = pgm_read_word(&combo1->keys[idx1])) != COMBO_END) {
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idx2 = 0;
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while ((key2 = pgm_read_word(&combo2->keys[idx2])) != COMBO_END) {
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if (key1 == key2) overlaps = true;
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idx2 += 1;
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}
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idx1 += 1;
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}
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if (!overlaps) return NULL;
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if (idx2 < idx1) return combo2;
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return combo1;
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}
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#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
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static bool keys_pressed_in_order(uint16_t combo_index, combo_t *combo, uint16_t key_index, uint16_t keycode, keyrecord_t *record) {
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# ifdef COMBO_MUST_PRESS_IN_ORDER_PER_COMBO
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if (!get_combo_must_press_in_order(combo_index, combo)) {
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return true;
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}
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# endif
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if (
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// The `state` bit for the key being pressed.
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(1 << key_index) ==
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// The *next* combo key's bit.
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(COMBO_STATE(combo) + 1)
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// E.g. two keys already pressed: `state == 11`.
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// Next possible `state` is `111`.
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// So the needed bit is `100` which we get with `11 + 1`.
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) {
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return true;
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}
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return false;
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}
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#endif
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static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record, uint16_t combo_index) {
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uint8_t key_count = 0;
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uint16_t key_index = -1;
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_find_key_index_and_count(combo->keys, keycode, &key_index, &key_count);
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/* Continue processing if key isn't part of current combo. */
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if (-1 == (int16_t)key_index) {
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return false;
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}
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bool key_is_part_of_combo = (!COMBO_DISABLED(combo) && is_combo_enabled()
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#if defined(COMBO_MUST_PRESS_IN_ORDER) || defined(COMBO_MUST_PRESS_IN_ORDER_PER_COMBO)
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&& keys_pressed_in_order(combo_index, combo, key_index, keycode, record)
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#endif
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#ifdef COMBO_SHOULD_TRIGGER
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&& combo_should_trigger(combo_index, combo, keycode, record)
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#endif
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);
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if (record->event.pressed && key_is_part_of_combo) {
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uint16_t time = _get_combo_term(combo_index, combo);
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if (!COMBO_ACTIVE(combo)) {
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KEY_STATE_DOWN(combo->state, key_index);
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if (longest_term < time) {
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longest_term = time;
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}
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}
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if (ALL_COMBO_KEYS_ARE_DOWN(COMBO_STATE(combo), key_count)) {
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/* Combo was fully pressed */
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/* Buffer the combo so we can fire it after COMBO_TERM */
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#ifndef COMBO_NO_TIMER
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/* Don't buffer this combo if its combo term has passed. */
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if (timer && timer_elapsed(timer) > time) {
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DISABLE_COMBO(combo);
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return true;
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} else
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#endif
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{
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// disable readied combos that overlap with this combo
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combo_t *drop = NULL;
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for (uint8_t combo_buffer_i = combo_buffer_read; combo_buffer_i != combo_buffer_write; INCREMENT_MOD(combo_buffer_i)) {
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queued_combo_t *qcombo = &combo_buffer[combo_buffer_i];
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combo_t * buffered_combo = &key_combos[qcombo->combo_index];
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if ((drop = overlaps(buffered_combo, combo))) {
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DISABLE_COMBO(drop);
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if (drop == combo) {
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// stop checking for overlaps if dropped combo was current combo.
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break;
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} else if (combo_buffer_i == combo_buffer_read && drop == buffered_combo) {
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/* Drop the disabled buffered combo from the buffer if
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* it is in the beginning of the buffer. */
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INCREMENT_MOD(combo_buffer_read);
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}
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}
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}
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if (drop != combo) {
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// save this combo to buffer
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combo_buffer[combo_buffer_write] = (queued_combo_t){
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.combo_index = combo_index,
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};
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INCREMENT_MOD(combo_buffer_write);
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// get possible longer waiting time for tap-/hold-only combos.
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longest_term = _get_wait_time(combo_index, combo);
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}
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} // if timer elapsed end
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}
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} else {
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// chord releases
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if (!COMBO_ACTIVE(combo) && ALL_COMBO_KEYS_ARE_DOWN(COMBO_STATE(combo), key_count)) {
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/* First key quickly released */
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if (COMBO_DISABLED(combo) || _get_combo_must_hold(combo_index, combo)) {
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// combo wasn't tappable, disable it and drop it from buffer.
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drop_combo_from_buffer(combo_index);
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key_is_part_of_combo = false;
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}
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#ifdef COMBO_MUST_TAP_PER_COMBO
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else if (get_combo_must_tap(combo_index, combo)) {
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// immediately apply tap-only combo
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apply_combo(combo_index, combo);
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apply_combos(); // also apply other prepared combos and dump key buffer
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# ifdef COMBO_PROCESS_KEY_RELEASE
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if (process_combo_key_release(combo_index, combo, key_index, keycode)) {
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release_combo(combo_index, combo);
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}
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# endif
|
|
}
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|
#endif
|
|
} else if (COMBO_ACTIVE(combo) && ONLY_ONE_KEY_IS_DOWN(COMBO_STATE(combo)) && KEY_NOT_YET_RELEASED(COMBO_STATE(combo), key_index)) {
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|
/* last key released */
|
|
release_combo(combo_index, combo);
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key_is_part_of_combo = true;
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|
|
|
#ifdef COMBO_PROCESS_KEY_RELEASE
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|
process_combo_key_release(combo_index, combo, key_index, keycode);
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|
#endif
|
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} else if (COMBO_ACTIVE(combo) && KEY_NOT_YET_RELEASED(COMBO_STATE(combo), key_index)) {
|
|
/* first or middle key released */
|
|
key_is_part_of_combo = true;
|
|
|
|
#ifdef COMBO_PROCESS_KEY_RELEASE
|
|
if (process_combo_key_release(combo_index, combo, key_index, keycode)) {
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|
release_combo(combo_index, combo);
|
|
}
|
|
#endif
|
|
} else {
|
|
/* The released key was part of an incomplete combo */
|
|
key_is_part_of_combo = false;
|
|
}
|
|
|
|
KEY_STATE_UP(combo->state, key_index);
|
|
}
|
|
|
|
return key_is_part_of_combo;
|
|
}
|
|
|
|
bool process_combo(uint16_t keycode, keyrecord_t *record) {
|
|
bool is_combo_key = false;
|
|
bool no_combo_keys_pressed = true;
|
|
|
|
if (keycode == CMB_ON && record->event.pressed) {
|
|
combo_enable();
|
|
return true;
|
|
}
|
|
|
|
if (keycode == CMB_OFF && record->event.pressed) {
|
|
combo_disable();
|
|
return true;
|
|
}
|
|
|
|
if (keycode == CMB_TOG && record->event.pressed) {
|
|
combo_toggle();
|
|
return true;
|
|
}
|
|
|
|
#ifdef COMBO_ONLY_FROM_LAYER
|
|
/* Only check keycodes from one layer. */
|
|
keycode = keymap_key_to_keycode(COMBO_ONLY_FROM_LAYER, record->event.key);
|
|
#endif
|
|
|
|
for (uint16_t idx = 0; idx < COMBO_LEN; ++idx) {
|
|
combo_t *combo = &key_combos[idx];
|
|
is_combo_key |= process_single_combo(combo, keycode, record, idx);
|
|
no_combo_keys_pressed = no_combo_keys_pressed && (NO_COMBO_KEYS_ARE_DOWN || COMBO_ACTIVE(combo) || COMBO_DISABLED(combo));
|
|
}
|
|
|
|
if (record->event.pressed && is_combo_key) {
|
|
#ifndef COMBO_NO_TIMER
|
|
# ifdef COMBO_STRICT_TIMER
|
|
if (!timer) {
|
|
// timer is set only on the first key
|
|
timer = timer_read();
|
|
}
|
|
# else
|
|
timer = timer_read();
|
|
# endif
|
|
#endif
|
|
|
|
if (key_buffer_size < COMBO_KEY_BUFFER_LENGTH) {
|
|
key_buffer[key_buffer_size++] = (queued_record_t){
|
|
.record = *record,
|
|
.keycode = keycode,
|
|
.combo_index = -1, // this will be set when applying combos
|
|
};
|
|
}
|
|
} else {
|
|
if (combo_buffer_read != combo_buffer_write) {
|
|
// some combo is prepared
|
|
apply_combos();
|
|
} else {
|
|
// reset state if there are no combo keys pressed at all
|
|
dump_key_buffer();
|
|
#ifndef COMBO_NO_TIMER
|
|
timer = 0;
|
|
#endif
|
|
clear_combos();
|
|
}
|
|
}
|
|
return !is_combo_key;
|
|
}
|
|
|
|
void combo_task(void) {
|
|
if (!b_combo_enable) {
|
|
return;
|
|
}
|
|
|
|
#ifndef COMBO_NO_TIMER
|
|
if (timer && timer_elapsed(timer) > longest_term) {
|
|
if (combo_buffer_read != combo_buffer_write) {
|
|
apply_combos();
|
|
longest_term = 0;
|
|
timer = 0;
|
|
} else {
|
|
dump_key_buffer();
|
|
timer = 0;
|
|
clear_combos();
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void combo_enable(void) { b_combo_enable = true; }
|
|
|
|
void combo_disable(void) {
|
|
#ifndef COMBO_NO_TIMER
|
|
timer = 0;
|
|
#endif
|
|
b_combo_enable = false;
|
|
combo_buffer_read = combo_buffer_write;
|
|
clear_combos();
|
|
dump_key_buffer();
|
|
}
|
|
|
|
void combo_toggle(void) {
|
|
if (b_combo_enable) {
|
|
combo_disable();
|
|
} else {
|
|
combo_enable();
|
|
}
|
|
}
|
|
|
|
bool is_combo_enabled(void) { return b_combo_enable; }
|