tap_dance_mod_tap.c

#include "process_keycode/process_tap_dance.h"
#include "action.h"
#include "action_layer.h"
#include "action_util.h"
#include "quantum.h"
#include "wait.h"

#define TD_PRESSED_EVENT 0xFF

#define ACTION_TAP_DANCE_MOD_TAP(kc1, kc2) {                            \
    .fn = { NULL, td_mod_tap_on_finished, td_mod_tap_on_reset },        \
    .user_data = (void *)&((qk_tap_dance_pair_t) { kc1, kc2 }),         \
  }

void td_mod_tap_on_finished(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_pair_t *pair = (qk_tap_dance_pair_t *)user_data;
    
    if (state->pressed && state->count == 1) {
        register_mods(pair->kc2);
        state->count = TD_PRESSED_EVENT; // magic number for reset
    } else if (state->count >= 1) {
        register_code16(pair->kc1);
    }
}

void td_mod_tap_on_reset(qk_tap_dance_state_t *state, void *user_data) {
    qk_tap_dance_pair_t *pair = (qk_tap_dance_pair_t *)user_data;

    if (state->count == TD_PRESSED_EVENT) {
        unregister_mods(pair->kc2);
    } else if (state->count >= 1) {
        unregister_code16(pair->kc1);
    }
}

qk_tap_dance_action_t tap_dance_actions[] = {
  [0] = ACTION_TAP_DANCE_MOD_TAP(KC_LBRC, MOD_LALT),
};