+ // enqueue
+ return false;
+ }
+#endif
+ else {
+ // other key events shall be enq'd till tapping state settles.
+ return false;
+ }
+ }
+ // tap_count > 0
+ else {
+ if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+ debug("Tapping: Tap release("); debug_dec(tapping_key.tap_count); debug(")\n");
+ keyp->tap_count = tapping_key.tap_count;
+ process_action(keyp);
+ tapping_key = *keyp;
+ debug_tapping_key();
+ return true;
+ }
+ else if (is_tap_key(keyp->event.key) && event.pressed) {
+ if (tapping_key.tap_count > 1) {
+ debug("Tapping: Start new tap with releasing last tap(>1).\n");
+ // unregister key
+ process_action(&(keyrecord_t){
+ .tap_count = tapping_key.tap_count,
+ .event.key = tapping_key.event.key,
+ .event.time = event.time,
+ .event.pressed = false
+ });
+ } else {
+ debug("Tapping: Start while last tap(1).\n");
+ }
+ tapping_key = *keyp;
+ waiting_buffer_scan_tap();
+ debug_tapping_key();
+ return true;
+ }
+ else {
+ if (!IS_NOEVENT(keyp->event)) {
+ debug("Tapping: key event while last tap(>0).\n");
+ }
+ process_action(keyp);
+ return true;
+ }
+ }
+ }
+ // after TAPPING_TERM
+ else {
+ if (tapping_key.tap_count == 0) {
+ debug("Tapping: End. Timeout. Not tap(0): ");
+ debug_event(event); debug("\n");
+ process_action(&tapping_key);
+ tapping_key = (keyrecord_t){};
+ debug_tapping_key();
+ return false;
+ } else {
+ if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+ debug("Tapping: End. last timeout tap release(>0).");
+ keyp->tap_count = tapping_key.tap_count;
+ process_action(keyp);
+ tapping_key = (keyrecord_t){};
+ return true;
+ }
+ else if (is_tap_key(keyp->event.key) && event.pressed) {
+ if (tapping_key.tap_count > 1) {
+ debug("Tapping: Start new tap with releasing last timeout tap(>1).\n");
+ // unregister key
+ process_action(&(keyrecord_t){
+ .tap_count = tapping_key.tap_count,
+ .event.key = tapping_key.event.key,
+ .event.time = event.time,
+ .event.pressed = false
+ });
+ } else {
+ debug("Tapping: Start while last timeout tap(1).\n");
+ }
+ tapping_key = *keyp;
+ waiting_buffer_scan_tap();
+ debug_tapping_key();
+ return true;
+ }
+ else {
+ if (!IS_NOEVENT(keyp->event)) {
+ debug("Tapping: key event while last timeout tap(>0).\n");
+ }
+ process_action(keyp);
+ return true;
+ }
+ }
+ }
+ } else if (IS_TAPPING_RELEASED()) {
+ if (WITHIN_TAPPING_TERM(event)) {
+ if (tapping_key.tap_count > 0 && IS_TAPPING_KEY(event.key) && event.pressed) {
+ // sequential tap.
+ keyp->tap_count = tapping_key.tap_count + 1;
+ debug("Tapping: Tap press("); debug_dec(keyp->tap_count); debug(")\n");
+ process_action(keyp);
+ tapping_key = *keyp;
+ debug_tapping_key();
+ return true;
+ } else if (event.pressed && is_tap_key(event.key)) {
+ // Sequential tap can be interfered with other tap key.
+ debug("Tapping: Start with interfering other tap.\n");
+ tapping_key = *keyp;
+ waiting_buffer_scan_tap();
+ debug_tapping_key();
+ return true;
+ } else {
+ if (!IS_NOEVENT(keyp->event)) debug("Tapping: other key just after tap.\n");
+ process_action(keyp);
+ return true;
+ }
+ } else {
+ // timeout. no sequential tap.
+ debug("Tapping: End(Timeout after releasing last tap): ");
+ debug_event(event); debug("\n");
+ tapping_key = (keyrecord_t){};
+ debug_tapping_key();
+ return false;
+ }
+ }
+ // not tapping satate
+ else {
+ if (event.pressed && is_tap_key(event.key)) {
+ debug("Tapping: Start(Press tap key).\n");
+ tapping_key = *keyp;
+ waiting_buffer_scan_tap();
+ debug_tapping_key();
+ return true;
+ } else {
+ process_action(keyp);
+ return true;
+ }
+ }
+}
+
+/* scan buffer for tapping */
+static void waiting_buffer_scan_tap(void)
+{
+ // tapping already is settled
+ if (tapping_key.tap_count > 0) return;
+ // invalid state: tapping_key released && tap_count == 0
+ if (!tapping_key.event.pressed) return;
+
+ for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+ if (IS_TAPPING_KEY(waiting_buffer[i].event.key) &&
+ !waiting_buffer[i].event.pressed &&
+ WITHIN_TAPPING_TERM(waiting_buffer[i].event)) {
+ tapping_key.tap_count = 1;
+ waiting_buffer[i].tap_count = 1;
+ process_action(&tapping_key);
+
+ debug("waiting_buffer_scan_tap: found at ["); debug_dec(i); debug("]\n");
+ debug_waiting_buffer();
+ return;
+ }
+ }