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#include "process_combo.h"
#include "print.h"
#define SEND_KEY(key) \
do { \
register_code16(key); \
send_keyboard_report(); \
unregister_code16(key); \
} while(0)
#define COMBO_TIMER_ELAPSED -1
#if COMBO_TERM
#define IS_COMBO_KEY_HELD(combo) (COMBO_TIMER_ELAPSED == combo->timer ? false : true)
#define RESET_COMBO_TIMER_AND_KEY(combo) combo->timer = 0; combo->key = 0
#else
#define IS_COMBO_KEY_HELD(combo) (true)
#define RESET_COMBO_TIMER_AND_KEY(combo) do {} while (0)
#endif
__attribute__ ((weak))
combo_t key_combos[COMBO_COUNT] = {
};
static inline void reset_combo(combo_t *combo)
{
combo->state = 0;
RESET_COMBO_TIMER_AND_KEY(combo);
}
#define ALL_COMBO_KEYS_ARE_DOWN (((1<<count)-1) == combo->state)
#define NO_COMBO_KEYS_ARE_DOWN (0 == combo->state)
#define KEY_STATE_DOWN(key) do{ combo->state |= (1<<key); } while(0)
#define KEY_STATE_UP(key) do{ combo->state &= ~(1<<key); } while(0)
static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record)
{
uint8_t count = 0;
uint8_t index = -1;
/* Find index of keycode and number of combo keys */
for (const uint16_t *keys = combo->keys; ;++count) {
uint16_t key = pgm_read_word(&keys[count]);
if (keycode == key) index = count;
if (COMBO_END == key) break;
}
/* Return if not a combo key */
if (-1 == index) return false;
bool is_combo_active = IS_COMBO_KEY_HELD(combo);
if (record->event.pressed) {
KEY_STATE_DOWN(index);
#if COMBO_TERM
if (is_combo_active) {
combo->timer = timer_read();
combo->key = keycode;
}
#endif
} else {
if (is_combo_active && combo->state) { /* Combo key was tapped */
RESET_COMBO_TIMER_AND_KEY(combo);
SEND_KEY(keycode);
}
#if COMBO_TERM
if (!is_combo_active && keycode == combo->key) { /* Held combo key was released */
unregister_code16(combo->key);
}
#endif
KEY_STATE_UP(index);
}
if (ALL_COMBO_KEYS_ARE_DOWN && is_combo_active) {
SEND_KEY(combo->action);
reset_combo(combo);
}
if(NO_COMBO_KEYS_ARE_DOWN && !is_combo_active) {
reset_combo(combo);
}
return is_combo_active;
}
bool process_combo(uint16_t keycode, keyrecord_t *record)
{
bool is_combo_key = false;
for (int i = 0; i < COMBO_COUNT; ++i) {
combo_t *combo = &key_combos[i];
is_combo_key |= process_single_combo(combo, keycode, record);
}
return !is_combo_key;
}
void matrix_scan_combo(void)
{
#if COMBO_TERM
for (int i = 0; i < COMBO_COUNT; ++i) {
combo_t *combo = &key_combos[i];
if (combo->timer &&
combo->timer != COMBO_TIMER_ELAPSED &&
timer_elapsed(combo->timer) > COMBO_TERM) {
combo->timer = COMBO_TIMER_ELAPSED;
unregister_code16(combo->key);
register_code16(combo->key);
}
}
#endif
}
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