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qmk_firmware/common/action_tapping.c

331 lines
11 KiB

#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