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-rw-r--r--common/action_tapping.c330
1 files changed, 330 insertions, 0 deletions
diff --git a/common/action_tapping.c b/common/action_tapping.c
new file mode 100644
index 0000000000..abb0bf5182
--- /dev/null
+++ b/common/action_tapping.c
@@ -0,0 +1,330 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include "action.h"
+#include "action_tapping.h"
+#include "timer.h"
+#include "debug.h"
+
+
+#ifndef NO_ACTION_TAPPING
+
+#define IS_TAPPING() !IS_NOEVENT(tapping_key.event)
+#define IS_TAPPING_PRESSED() (IS_TAPPING() && tapping_key.event.pressed)
+#define IS_TAPPING_RELEASED() (IS_TAPPING() && !tapping_key.event.pressed)
+#define IS_TAPPING_KEY(k) (IS_TAPPING() && KEYEQ(tapping_key.event.key, (k)))
+#define WITHIN_TAPPING_TERM(e) (TIMER_DIFF_16(e.time, tapping_key.event.time) < TAPPING_TERM)
+
+
+static keyrecord_t tapping_key = {};
+static keyrecord_t waiting_buffer[WAITING_BUFFER_SIZE] = {};
+static uint8_t waiting_buffer_head = 0;
+static uint8_t waiting_buffer_tail = 0;
+
+static bool process_tapping(keyrecord_t *record);
+static bool waiting_buffer_enq(keyrecord_t record);
+static void waiting_buffer_clear(void);
+#if TAPPING_TERM >= 500
+static bool waiting_buffer_typed(keyevent_t event);
+#endif
+static bool waiting_buffer_has_anykey_pressed(void);
+static void waiting_buffer_scan_tap(void);
+static void debug_tapping_key(void);
+static void debug_waiting_buffer(void);
+
+
+void action_tapping_process(keyrecord_t record)
+{
+ if (process_tapping(&record)) {
+ if (!IS_NOEVENT(record.event)) {
+ debug("processed: "); debug_record(record); debug("\n");
+ }
+ } else {
+ if (!waiting_buffer_enq(record)) {
+ // clear all in case of overflow.
+ debug("OVERFLOW: CLEAR ALL STATES\n");
+ clear_keyboard();
+ waiting_buffer_clear();
+ tapping_key = (keyrecord_t){};
+ }
+ }
+
+ // process waiting_buffer
+ if (!IS_NOEVENT(record.event) && waiting_buffer_head != waiting_buffer_tail) {
+ debug("---- action_exec: process waiting_buffer -----\n");
+ }
+ for (; waiting_buffer_tail != waiting_buffer_head; waiting_buffer_tail = (waiting_buffer_tail + 1) % WAITING_BUFFER_SIZE) {
+ if (process_tapping(&waiting_buffer[waiting_buffer_tail])) {
+ debug("processed: waiting_buffer["); debug_dec(waiting_buffer_tail); debug("] = ");
+ debug_record(waiting_buffer[waiting_buffer_tail]); debug("\n\n");
+ } else {
+ break;
+ }
+ }
+ if (!IS_NOEVENT(record.event)) {
+ debug("\n");
+ }
+}
+
+
+/* Tapping
+ *
+ * Rule: Tap key is typed(pressed and released) within TAPPING_TERM.
+ * (without interfering by typing other key)
+ */
+/* return true when key event is processed or consumed. */
+bool process_tapping(keyrecord_t *keyp)
+{
+ keyevent_t event = keyp->event;
+
+ // if tapping
+ if (IS_TAPPING_PRESSED()) {
+ if (WITHIN_TAPPING_TERM(event)) {
+ if (tapping_key.tap.count == 0) {
+ if (IS_TAPPING_KEY(event.key) && !event.pressed) {
+ // first tap!
+ debug("Tapping: First tap(0->1).\n");
+ tapping_key.tap.count = 1;
+ tapping_key.tap.interrupted = (waiting_buffer_has_anykey_pressed() ? true : false);
+ debug_tapping_key();
+ process_action(&tapping_key);
+
+ // enqueue
+ keyp->tap = tapping_key.tap;
+ return false;
+ }
+#if TAPPING_TERM >= 500
+ /* This can prevent from typing some tap keys in a row at a time. */
+ else if (!event.pressed && waiting_buffer_typed(event)) {
+ // other key typed. not tap.
+ debug("Tapping: End. No tap. Interfered by typing key\n");
+ process_action(&tapping_key);
+ tapping_key = (keyrecord_t){};
+ debug_tapping_key();
+
+ // 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 = tapping_key.tap;
+ 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 = tapping_key.tap,
+ .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 = tapping_key.tap;
+ 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 = tapping_key.tap,
+ .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 = tapping_key.tap;
+ keyp->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;
+ }
+ }
+}
+
+
+/*
+ * Waiting buffer
+ */
+bool waiting_buffer_enq(keyrecord_t record)
+{
+ if (IS_NOEVENT(record.event)) {
+ return true;
+ }
+
+ if ((waiting_buffer_head + 1) % WAITING_BUFFER_SIZE == waiting_buffer_tail) {
+ debug("waiting_buffer_enq: Over flow.\n");
+ return false;
+ }
+
+ waiting_buffer[waiting_buffer_head] = record;
+ waiting_buffer_head = (waiting_buffer_head + 1) % WAITING_BUFFER_SIZE;
+
+ debug("waiting_buffer_enq: "); debug_waiting_buffer();
+ return true;
+}
+
+void waiting_buffer_clear(void)
+{
+ waiting_buffer_head = 0;
+ waiting_buffer_tail = 0;
+}
+
+#if TAPPING_TERM >= 500
+bool waiting_buffer_typed(keyevent_t event)
+{
+ for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+ if (KEYEQ(event.key, waiting_buffer[i].event.key) && event.pressed != waiting_buffer[i].event.pressed) {
+ return true;
+ }
+ }
+ return false;
+}
+#endif
+
+bool waiting_buffer_has_anykey_pressed(void)
+{
+ for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+ if (waiting_buffer[i].event.pressed) return true;
+ }
+ return false;
+}
+
+/* scan buffer for tapping */
+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;
+ }
+ }
+}
+
+
+/*
+ * debug print
+ */
+static void debug_tapping_key(void)
+{
+ debug("TAPPING_KEY="); debug_record(tapping_key); debug("\n");
+}
+
+static void debug_waiting_buffer(void)
+{
+ debug("{ ");
+ for (uint8_t i = waiting_buffer_tail; i != waiting_buffer_head; i = (i + 1) % WAITING_BUFFER_SIZE) {
+ debug("["); debug_dec(i); debug("]="); debug_record(waiting_buffer[i]); debug(" ");
+ }
+ debug("}\n");
+}
+
+#endif