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keychron_qmk_firmware/quantum/action_tapping.c
Felix Kuehling 4ae7525923
Bug17281 - Retain momentary layers until the end of tapping (#17282) 
* Make process_tapping more readable

Move most #ifdefs into conditionally defined macros to make the logic
easier to follow.

* Retain momentary layers until the end of tapping

This allows mod-tap and layer-tap keys on layers to behave as expected.

Bug: https://github.com/qmk/qmk_firmware/issues/17281

* Add tests for delayed mod/layer release while tapping

Mods and layer key release is delayed while tapping is in progress to
ensure that the tap is registered with the modifier state and on the
layer where the key was first pressed.

Signed-off-by: Felix Kuehling <felix.kuehling@gmail.com>
2022-11-28 09:16:38 +01:00

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#include <stdint.h>
#include <stdbool.h>
#ifdef DEBUG_ACTION
# include "debug.h"
#else
# include "nodebug.h"
#endif
#include "action.h"
#include "action_layer.h"
#include "action_tapping.h"
#include "keycode.h"
#include "timer.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)))
# ifndef COMBO_ENABLE
# define IS_TAPPING_RECORD(r) (IS_TAPPING() && KEYEQ(tapping_key.event.key, (r->event.key)))
# else
# define IS_TAPPING_RECORD(r) (IS_TAPPING() && KEYEQ(tapping_key.event.key, (r->event.key)) && tapping_key.keycode == r->keycode)
# endif
# define WITHIN_TAPPING_TERM(e) (TIMER_DIFF_16(e.time, tapping_key.event.time) < GET_TAPPING_TERM(get_record_keycode(&tapping_key, false), &tapping_key))
# ifdef DYNAMIC_TAPPING_TERM_ENABLE
uint16_t g_tapping_term = TAPPING_TERM;
# endif
# ifdef TAPPING_TERM_PER_KEY
__attribute__((weak)) uint16_t get_tapping_term(uint16_t keycode, keyrecord_t *record) {
# ifdef DYNAMIC_TAPPING_TERM_ENABLE
return g_tapping_term;
# else
return TAPPING_TERM;
# endif
}
# endif
# ifdef TAPPING_FORCE_HOLD_PER_KEY
__attribute__((weak)) bool get_tapping_force_hold(uint16_t keycode, keyrecord_t *record) {
return false;
}
# endif
# ifdef PERMISSIVE_HOLD_PER_KEY
__attribute__((weak)) bool get_permissive_hold(uint16_t keycode, keyrecord_t *record) {
return false;
}
# endif
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
__attribute__((weak)) bool get_hold_on_other_key_press(uint16_t keycode, keyrecord_t *record) {
return false;
}
# endif
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
# include "process_auto_shift.h"
# endif
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);
static bool waiting_buffer_typed(keyevent_t event);
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);
/** \brief Action Tapping Process
*
* FIXME: Needs doc
*/
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");
}
}
/* Some conditionally defined helper macros to keep process_tapping more
* readable. The conditional definition of tapping_keycode and all the
* conditional uses of it are hidden inside macros named TAP_...
*/
# if (defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)) || defined(PERMISSIVE_HOLD_PER_KEY) || defined(TAPPING_FORCE_HOLD_PER_KEY) || defined(HOLD_ON_OTHER_KEY_PRESS_PER_KEY)
# define TAP_DEFINE_KEYCODE uint16_t tapping_keycode = get_record_keycode(&tapping_key, false)
# else
# define TAP_DEFINE_KEYCODE
# endif
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
# ifdef RETRO_TAPPING_PER_KEY
# define TAP_GET_RETRO_TAPPING get_retro_tapping(tapping_keycode, &tapping_key)
# else
# define TAP_GET_RETRO_TAPPING true
# endif
# define MAYBE_RETRO_SHIFTING(ev) (TAP_GET_RETRO_TAPPING && (RETRO_SHIFT + 0) != 0 && TIMER_DIFF_16((ev).time, tapping_key.event.time) < (RETRO_SHIFT + 0))
# define TAP_IS_LT IS_LT(tapping_keycode)
# define TAP_IS_MT IS_MT(tapping_keycode)
# define TAP_IS_RETRO IS_RETRO(tapping_keycode)
# else
# define TAP_GET_RETRO_TAPPING false
# define MAYBE_RETRO_SHIFTING(ev) false
# define TAP_IS_LT false
# define TAP_IS_MT false
# define TAP_IS_RETRO false
# endif
# ifdef PERMISSIVE_HOLD_PER_KEY
# define TAP_GET_PERMISSIVE_HOLD get_permissive_hold(tapping_keycode, &tapping_key)
# elif defined(PERMISSIVE_HOLD)
# define TAP_GET_PERMISSIVE_HOLD true
# else
# define TAP_GET_PERMISSIVE_HOLD false
# endif
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS get_hold_on_other_key_press(tapping_keycode, &tapping_key)
# elif defined(HOLD_ON_OTHER_KEY_PRESS)
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS true
# else
# define TAP_GET_HOLD_ON_OTHER_KEY_PRESS false
# endif
# ifdef IGNORE_MOD_TAP_INTERRUPT_PER_KEY
# define TAP_GET_IGNORE_MOD_TAP_INTERRUPT get_ignore_mod_tap_interrupt(tapping_keycode, &tapping_key)
# elif defined(IGNORE_MOD_TAP_INTERRUPT)
# define TAP_GET_IGNORE_MOD_TAP_INTERRUPT true
# else
# define TAP_GET_IGNORE_MOD_TAP_INTERRUPT false
# endif
# ifdef TAPPING_FORCE_HOLD_PER_KEY
# define TAP_GET_TAPPING_FORCE_HOLD get_tapping_force_hold(tapping_keycode, &tapping_key)
# elif defined(TAPPING_FORCE_HOLD)
# define TAP_GET_TAPPING_FORCE_HOLD true
# else
# define TAP_GET_TAPPING_FORCE_HOLD false
# endif
/** \brief 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;
TAP_DEFINE_KEYCODE;
// if tapping
if (IS_TAPPING_PRESSED()) {
if (WITHIN_TAPPING_TERM(event) || MAYBE_RETRO_SHIFTING(event)) {
if (tapping_key.tap.count == 0) {
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
# if defined(AUTO_SHIFT_ENABLE) && defined(RETRO_SHIFT)
retroshift_swap_times();
# endif
// first tap!
debug("Tapping: First tap(0->1).\n");
tapping_key.tap.count = 1;
debug_tapping_key();
process_record(&tapping_key);
// copy tapping state
keyp->tap = tapping_key.tap;
// enqueue
return false;
}
/* Process a key typed within TAPPING_TERM
* This can register the key before settlement of tapping,
* useful for long TAPPING_TERM but may prevent fast typing.
*/
// clang-format off
else if (
(
IS_RELEASED(event) && waiting_buffer_typed(event) &&
TAP_GET_PERMISSIVE_HOLD
)
// Causes nested taps to not wait past TAPPING_TERM/RETRO_SHIFT
// unnecessarily and fixes them for Layer Taps.
|| (TAP_GET_RETRO_TAPPING &&
(
// Rolled over the two keys.
(tapping_key.tap.interrupted == true && (
(TAP_IS_LT && TAP_GET_HOLD_ON_OTHER_KEY_PRESS) ||
(TAP_IS_MT && !TAP_GET_IGNORE_MOD_TAP_INTERRUPT)
)
)
// Makes Retro Shift ignore [IGNORE_MOD_TAP_INTERRUPT's
// effects on nested taps for MTs and the default
// behavior of LTs] below TAPPING_TERM or RETRO_SHIFT.
|| (
TAP_IS_RETRO
&& (event.key.col != tapping_key.event.key.col || event.key.row != tapping_key.event.key.row)
&& IS_RELEASED(event) && waiting_buffer_typed(event)
)
)
)
) {
// clang-format on
debug("Tapping: End. No tap. Interfered by typing key\n");
process_record(&tapping_key);
tapping_key = (keyrecord_t){};
debug_tapping_key();
// enqueue
return false;
}
/* Process release event of a key pressed before tapping starts
* Without this unexpected repeating will occur with having fast repeating setting
* https://github.com/tmk/tmk_keyboard/issues/60
*/
else if (IS_RELEASED(event) && !waiting_buffer_typed(event)) {
// Modifier/Layer should be retained till end of this tapping.
action_t action = layer_switch_get_action(event.key);
switch (action.kind.id) {
case ACT_LMODS:
case ACT_RMODS:
if (action.key.mods && !action.key.code) return false;
if (IS_MOD(action.key.code)) return false;
break;
case ACT_LMODS_TAP:
case ACT_RMODS_TAP:
if (action.key.mods && keyp->tap.count == 0) return false;
if (IS_MOD(action.key.code)) return false;
break;
case ACT_LAYER_TAP:
case ACT_LAYER_TAP_EXT:
switch (action.layer_tap.code) {
case 0 ...(OP_TAP_TOGGLE - 1):
case OP_ON_OFF:
case OP_OFF_ON:
case OP_SET_CLEAR:
return false;
}
break;
}
// Release of key should be process immediately.
debug("Tapping: release event of a key pressed before tapping\n");
process_record(keyp);
return true;
} else {
// set interrupted flag when other key preesed during tapping
if (event.pressed) {
tapping_key.tap.interrupted = true;
if (TAP_GET_HOLD_ON_OTHER_KEY_PRESS) {
debug("Tapping: End. No tap. Interfered by pressed key\n");
process_record(&tapping_key);
tapping_key = (keyrecord_t){};
debug_tapping_key();
// enqueue
return false;
}
}
// enqueue
return false;
}
}
// tap_count > 0
else {
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
debug("Tapping: Tap release(");
debug_dec(tapping_key.tap.count);
debug(")\n");
keyp->tap = tapping_key.tap;
process_record(keyp);
tapping_key = *keyp;
debug_tapping_key();
return true;
} else if (is_tap_record(keyp) && event.pressed) {
if (tapping_key.tap.count > 1) {
debug("Tapping: Start new tap with releasing last tap(>1).\n");
// unregister key
process_record(&(keyrecord_t){
.tap = tapping_key.tap,
.event.key = tapping_key.event.key,
.event.time = event.time,
.event.pressed = false,
# ifdef COMBO_ENABLE
.keycode = tapping_key.keycode,
# endif
});
} 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(event)) {
debug("Tapping: key event while last tap(>0).\n");
}
process_record(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_record(&tapping_key);
tapping_key = (keyrecord_t){};
debug_tapping_key();
return false;
} else {
if (IS_TAPPING_RECORD(keyp) && !event.pressed) {
debug("Tapping: End. last timeout tap release(>0).");
keyp->tap = tapping_key.tap;
process_record(keyp);
tapping_key = (keyrecord_t){};
return true;
} else if (is_tap_record(keyp) && event.pressed) {
if (tapping_key.tap.count > 1) {
debug("Tapping: Start new tap with releasing last timeout tap(>1).\n");
// unregister key
process_record(&(keyrecord_t){
.tap = tapping_key.tap,
.event.key = tapping_key.event.key,
.event.time = event.time,
.event.pressed = false,
# ifdef COMBO_ENABLE
.keycode = tapping_key.keycode,
# endif
});
} 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(event)) {
debug("Tapping: key event while last timeout tap(>0).\n");
}
process_record(keyp);
return true;
}
}
}
} else if (IS_TAPPING_RELEASED()) {
if (WITHIN_TAPPING_TERM(event) || MAYBE_RETRO_SHIFTING(event)) {
if (event.pressed) {
if (IS_TAPPING_RECORD(keyp)) {
if (!TAP_GET_TAPPING_FORCE_HOLD && !tapping_key.tap.interrupted && tapping_key.tap.count > 0) {
// sequential tap.
keyp->tap = tapping_key.tap;
if (keyp->tap.count < 15) keyp->tap.count += 1;
debug("Tapping: Tap press(");
debug_dec(keyp->tap.count);
debug(")\n");
process_record(keyp);
tapping_key = *keyp;
debug_tapping_key();
return true;
}
// FIX: start new tap again
tapping_key = *keyp;
return true;
} else if (is_tap_record(keyp)) {
// 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 {
// should none in buffer
// FIX: interrupted when other key is pressed
tapping_key.tap.interrupted = true;
process_record(keyp);
return true;
}
} else {
if (!IS_NOEVENT(event)) debug("Tapping: other key just after tap.\n");
process_record(keyp);
return true;
}
} else {
// FIX: process_action here?
// 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 state
else {
if (event.pressed && is_tap_record(keyp)) {
debug("Tapping: Start(Press tap key).\n");
tapping_key = *keyp;
process_record_tap_hint(&tapping_key);
waiting_buffer_scan_tap();
debug_tapping_key();
return true;
} else {
process_record(keyp);
return true;
}
}
}
/** \brief Waiting buffer enq
*
* FIXME: Needs docs
*/
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;
}
/** \brief Waiting buffer clear
*
* FIXME: Needs docs
*/
void waiting_buffer_clear(void) {
waiting_buffer_head = 0;
waiting_buffer_tail = 0;
}
/** \brief Waiting buffer typed
*
* FIXME: Needs docs
*/
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;
}
/** \brief Waiting buffer has anykey pressed
*
* FIXME: Needs docs
*/
__attribute__((unused)) 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;
}
/** \brief Scan buffer for tapping
*
* FIXME: Needs docs
*/
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_record(&tapping_key);
debug("waiting_buffer_scan_tap: found at [");
debug_dec(i);
debug("]\n");
debug_waiting_buffer();
return;
}
}
}
/** \brief Tapping key debug print
*
* FIXME: Needs docs
*/
static void debug_tapping_key(void) {
debug("TAPPING_KEY=");
debug_record(tapping_key);
debug("\n");
}
/** \brief Waiting buffer debug print
*
* FIXME: Needs docs
*/
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
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