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Merge 24fae67788 into f0b04b2a3a

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Stephen Ostermiller 2025-07-15 18:16:12 +04:00 committed by GitHub
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5 changed files with 96 additions and 44 deletions
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3
docs/ChangeLog/20250831/pr25415.md Normal file
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@ -0,0 +1,3 @@
# Tap dance state removed from `tap_dance_action_t`
Code that accessed the tap dance state as a field in the tap dance action should now call `tap_dance_get_state(int tap_dance_idx)` instead. That function may return `NULL` if many tap dance keys are held together. Add a `NULL` check before using the returned state.

8
docs/features/tap_dance.md
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@ -209,11 +209,13 @@ tap_dance_action_t tap_dance_actions[] = {
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
tap_dance_action_t *action;
tap_dance_state_t* state;
switch (keycode) {
case TD(CT_CLN): // list all tap dance keycodes with tap-hold configurations
action = &tap_dance_actions[QK_TAP_DANCE_GET_INDEX(keycode)];
if (!record->event.pressed && action->state.count && !action->state.finished) {
case TD(CT_CLN):
action = tap_dance_get(QK_TAP_DANCE_GET_INDEX(keycode));
state = tap_dance_get_state(QK_TAP_DANCE_GET_INDEX(keycode));
if (!record->event.pressed && state != NULL && state->count && !state->finished) {
tap_dance_tap_hold_t *tap_hold = (tap_dance_tap_hold_t *)action->user_data;
tap_code16(tap_hold->tap);
}

114
quantum/process_keycode/process_tap_dance.c
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@ -24,8 +24,38 @@
#include "keymap_introspection.h"
static uint16_t active_td;
#ifndef TAP_DANCE_MAX_SIMULTANEOUS
# define TAP_DANCE_MAX_SIMULTANEOUS 3
#endif
static tap_dance_state_t tap_dance_states[TAP_DANCE_MAX_SIMULTANEOUS];
static uint16_t last_tap_time;
tap_dance_state_t *tap_dance_get_state(uint8_t tap_dance_idx) {
uint8_t i;
if (tap_dance_idx >= tap_dance_count()) {
return NULL;
}
// Search for a state already used for this keycode
for (i = 0; i < TAP_DANCE_MAX_SIMULTANEOUS; i++) {
if (tap_dance_states[i].in_use && tap_dance_states[i].index == tap_dance_idx) {
return &tap_dance_states[i];
}
}
// Search for the first available state
for (i = 0; i < TAP_DANCE_MAX_SIMULTANEOUS; i++) {
if (!tap_dance_states[i].in_use) {
tap_dance_states[i].index = tap_dance_idx;
tap_dance_states[i].in_use = true;
return &tap_dance_states[i];
}
}
// No states are available, tap dance won't happen
return NULL;
}
void tap_dance_pair_on_each_tap(tap_dance_state_t *state, void *user_data) {
tap_dance_pair_t *pair = (tap_dance_pair_t *)user_data;
@ -86,58 +116,64 @@ static inline void _process_tap_dance_action_fn(tap_dance_state_t *state, void *
}
}
static inline void process_tap_dance_action_on_each_tap(tap_dance_action_t *action) {
action->state.count++;
action->state.weak_mods = get_mods();
action->state.weak_mods |= get_weak_mods();
static inline void process_tap_dance_action_on_each_tap(tap_dance_action_t *action, tap_dance_state_t *state) {
state->count++;
state->weak_mods = get_mods();
state->weak_mods |= get_weak_mods();
#ifndef NO_ACTION_ONESHOT
action->state.oneshot_mods = get_oneshot_mods();
state->oneshot_mods = get_oneshot_mods();
#endif
_process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_each_tap);
_process_tap_dance_action_fn(state, action->user_data, action->fn.on_each_tap);
}
static inline void process_tap_dance_action_on_each_release(tap_dance_action_t *action) {
_process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_each_release);
static inline void process_tap_dance_action_on_each_release(tap_dance_action_t *action, tap_dance_state_t *state) {
_process_tap_dance_action_fn(state, action->user_data, action->fn.on_each_release);
}
static inline void process_tap_dance_action_on_reset(tap_dance_action_t *action) {
_process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_reset);
del_weak_mods(action->state.weak_mods);
static inline void process_tap_dance_action_on_reset(tap_dance_action_t *action, tap_dance_state_t *state) {
_process_tap_dance_action_fn(state, action->user_data, action->fn.on_reset);
del_weak_mods(state->weak_mods);
#ifndef NO_ACTION_ONESHOT
del_mods(action->state.oneshot_mods);
del_mods(state->oneshot_mods);
#endif
send_keyboard_report();
action->state = (const tap_dance_state_t){0};
// Clear the tap dance state and mark it as unused
memset(state, 0, sizeof(tap_dance_state_t));
}
static inline void process_tap_dance_action_on_dance_finished(tap_dance_action_t *action) {
if (!action->state.finished) {
action->state.finished = true;
add_weak_mods(action->state.weak_mods);
static inline void process_tap_dance_action_on_dance_finished(tap_dance_action_t *action, tap_dance_state_t *state) {
if (!state->finished) {
state->finished = true;
add_weak_mods(state->weak_mods);
#ifndef NO_ACTION_ONESHOT
add_mods(action->state.oneshot_mods);
add_mods(state->oneshot_mods);
#endif
send_keyboard_report();
_process_tap_dance_action_fn(&action->state, action->user_data, action->fn.on_dance_finished);
_process_tap_dance_action_fn(state, action->user_data, action->fn.on_dance_finished);
}
active_td = 0;
if (!action->state.pressed) {
if (!state->pressed) {
// There will not be a key release event, so reset now.
process_tap_dance_action_on_reset(action);
process_tap_dance_action_on_reset(action, state);
}
}
bool preprocess_tap_dance(uint16_t keycode, keyrecord_t *record) {
tap_dance_action_t *action;
tap_dance_state_t * state;
if (!record->event.pressed) return false;
if (!active_td || keycode == active_td) return false;
action = tap_dance_get(QK_TAP_DANCE_GET_INDEX(active_td));
action->state.interrupted = true;
action->state.interrupting_keycode = keycode;
process_tap_dance_action_on_dance_finished(action);
action = tap_dance_get(QK_TAP_DANCE_GET_INDEX(active_td));
state = tap_dance_get_state(QK_TAP_DANCE_GET_INDEX(active_td));
if (state == NULL) {
return false;
}
state->interrupted = true;
state->interrupting_keycode = keycode;
process_tap_dance_action_on_dance_finished(action, state);
// Tap dance actions can leave some weak mods active (e.g., if the tap dance is mapped to a keycode with
// modifiers), but these weak mods should not affect the keypress which interrupted the tap dance.
@ -151,8 +187,9 @@ bool preprocess_tap_dance(uint16_t keycode, keyrecord_t *record) {
}
bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
int td_index;
uint8_t td_index;
tap_dance_action_t *action;
tap_dance_state_t * state;
switch (keycode) {
case QK_TAP_DANCE ... QK_TAP_DANCE_MAX:
@ -161,16 +198,19 @@ bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
return false;
}
action = tap_dance_get(td_index);
action->state.pressed = record->event.pressed;
state = tap_dance_get_state(td_index);
if (state == NULL) {
return false;
}
state->pressed = record->event.pressed;
if (record->event.pressed) {
last_tap_time = timer_read();
process_tap_dance_action_on_each_tap(action);
active_td = action->state.finished ? 0 : keycode;
process_tap_dance_action_on_each_tap(action, state);
active_td = state->finished ? 0 : keycode;
} else {
process_tap_dance_action_on_each_release(action);
if (action->state.finished) {
process_tap_dance_action_on_reset(action);
process_tap_dance_action_on_each_release(action, state);
if (state->finished) {
process_tap_dance_action_on_reset(action, state);
if (active_td == keycode) {
active_td = 0;
}
@ -185,16 +225,18 @@ bool process_tap_dance(uint16_t keycode, keyrecord_t *record) {
void tap_dance_task(void) {
tap_dance_action_t *action;
tap_dance_state_t * state;
if (!active_td || timer_elapsed(last_tap_time) <= GET_TAPPING_TERM(active_td, &(keyrecord_t){})) return;
action = tap_dance_get(QK_TAP_DANCE_GET_INDEX(active_td));
if (!action->state.interrupted) {
process_tap_dance_action_on_dance_finished(action);
state = tap_dance_get_state(QK_TAP_DANCE_GET_INDEX(active_td));
if (state != NULL && !state->interrupted) {
process_tap_dance_action_on_dance_finished(action, state);
}
}
void reset_tap_dance(tap_dance_state_t *state) {
active_td = 0;
process_tap_dance_action_on_reset((tap_dance_action_t *)state);
process_tap_dance_action_on_reset(tap_dance_get(state->index), state);
}

11
quantum/process_keycode/process_tap_dance.h
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@ -28,15 +28,16 @@ typedef struct {
#ifndef NO_ACTION_ONESHOT
uint8_t oneshot_mods;
#endif
bool pressed : 1;
bool finished : 1;
bool interrupted : 1;
bool pressed : 1;
bool finished : 1;
bool interrupted : 1;
bool in_use : 1;
uint8_t index;
} tap_dance_state_t;
typedef void (*tap_dance_user_fn_t)(tap_dance_state_t *state, void *user_data);
typedef struct tap_dance_action_t {
tap_dance_state_t state;
struct {
tap_dance_user_fn_t on_each_tap;
tap_dance_user_fn_t on_dance_finished;
@ -80,6 +81,8 @@ typedef struct {
void reset_tap_dance(tap_dance_state_t *state);
tap_dance_state_t *tap_dance_get_state(uint8_t tap_dance_idx);
/* To be used internally */
bool preprocess_tap_dance(uint16_t keycode, keyrecord_t *record);

4
tests/tap_dance/examples.c
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@ -81,11 +81,13 @@ typedef struct {
bool process_record_user(uint16_t keycode, keyrecord_t *record) {
tap_dance_action_t *action;
tap_dance_state_t* state;
switch (keycode) {
case TD(CT_CLN):
action = tap_dance_get(QK_TAP_DANCE_GET_INDEX(keycode));
if (!record->event.pressed && action->state.count && !action->state.finished) {
state = tap_dance_get_state(QK_TAP_DANCE_GET_INDEX(keycode));
if (!record->event.pressed && state != NULL && state->count && !state->finished) {
tap_dance_tap_hold_t *tap_hold = (tap_dance_tap_hold_t *)action->user_data;
tap_code16(tap_hold->tap);
}