diff options
Diffstat (limited to 'common/action_tapping.c')
| -rw-r--r-- | common/action_tapping.c | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/common/action_tapping.c b/common/action_tapping.c new file mode 100644 index 000000000..abb0bf518 --- /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 |