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keychron_qmk_firmware/quantum/process_keycode/process_auto_shift.c

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/* Copyright 2017 Jeremy Cowgar
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "process_auto_shift.h"
#include "quantum.h"
#include "action_util.h"
#include "timer.h"
#include "keycodes.h"
#ifndef AUTO_SHIFT_DISABLED_AT_STARTUP
# define AUTO_SHIFT_STARTUP_STATE true /* enabled */
#else
# define AUTO_SHIFT_STARTUP_STATE false /* disabled */
#endif
// Stores the last Auto Shift key's up or down time, for evaluation or keyrepeat.
static uint16_t autoshift_time = 0;
#if defined(RETRO_SHIFT) && !defined(NO_ACTION_TAPPING)
// Stores the last key's up or down time, to replace autoshift_time so that Tap Hold times are accurate.
static uint16_t retroshift_time = 0;
// Stores a possibly Retro Shift key's up or down time, as retroshift_time needs
// to be set before the Retro Shift key is evaluated if it is interrupted by an
// Auto Shifted key.
static uint16_t last_retroshift_time;
#endif
static uint16_t autoshift_timeout = AUTO_SHIFT_TIMEOUT;
static uint16_t autoshift_lastkey = KC_NO;
static keyrecord_t autoshift_lastrecord;
// Keys take 8 bits if modifiers are excluded. This records the shift state
// when pressed for each key, so that can be passed to the release function
// and it knows which key needs to be released (if shifted is different base).
static uint16_t autoshift_shift_states[((1 << 8) + 15) / 16];
static struct {
// Whether Auto Shift is enabled.
bool enabled : 1;
// Whether the last auto-shifted key was released after the timeout. This
// is used to replicate the last key for a tap-then-hold.
bool lastshifted : 1;
// Whether an auto-shiftable key has been pressed but not processed.
bool in_progress : 1;
// Whether the auto-shifted keypress has been registered.
bool holding_shift : 1;
// Whether the user is holding a shift and we removed it.
bool cancelling_lshift : 1;
bool cancelling_rshift : 1;
// clang-format wants to remove the true for some reason.
// clang-format off
} autoshift_flags = {AUTO_SHIFT_STARTUP_STATE, false, false, false, false, false};
// clang-format on
/** \brief Called on physical press, returns whether key should be added to Auto Shift */
__attribute__((weak)) bool get_custom_auto_shifted_key(uint16_t keycode, keyrecord_t *record) {
return false;
}
/** \brief Called on physical press, returns whether key is an Auto Shift key */
__attribute__((weak)) bool get_auto_shifted_key(uint16_t keycode, keyrecord_t *record) {
switch (keycode) {
#ifndef NO_AUTO_SHIFT_ALPHA
case AUTO_SHIFT_ALPHA:
#endif
#ifndef NO_AUTO_SHIFT_NUMERIC
case AUTO_SHIFT_NUMERIC:
#endif
#ifndef NO_AUTO_SHIFT_SPECIAL
# ifndef NO_AUTO_SHIFT_TAB
case KC_TAB:
# endif
# ifndef NO_AUTO_SHIFT_SYMBOLS
case AUTO_SHIFT_SYMBOLS:
# endif
#endif
#ifdef AUTO_SHIFT_ENTER
case KC_ENT:
#endif
return true;
}
return get_custom_auto_shifted_key(keycode, record);
}
/** \brief Called to check whether defines should apply if PER_KEY is set for it */
__attribute__((weak)) bool get_auto_shift_repeat(uint16_t keycode, keyrecord_t *record) {
return true;
}
__attribute__((weak)) bool get_auto_shift_no_auto_repeat(uint16_t keycode, keyrecord_t *record) {
return true;
}
/** \brief Called when an Auto Shift key needs to be pressed */
__attribute__((weak)) void autoshift_press_user(uint16_t keycode, bool shifted, keyrecord_t *record) {
if (shifted) {
add_weak_mods(MOD_BIT(KC_LSFT));
}
register_code16((IS_RETRO(keycode)) ? keycode & 0xFF : keycode);
}
/** \brief Called when an Auto Shift key needs to be released */
__attribute__((weak)) void autoshift_release_user(uint16_t keycode, bool shifted, keyrecord_t *record) {
unregister_code16((IS_RETRO(keycode)) ? keycode & 0xFF : keycode);
}
/** \brief Sets the shift state to use when keyrepeating, required by custom shifts */
void set_autoshift_shift_state(uint16_t keycode, bool shifted) {
keycode = keycode & 0xFF;
if (shifted) {
autoshift_shift_states[keycode / 16] |= (uint16_t)1 << keycode % 16;
} else {
autoshift_shift_states[keycode / 16] &= ~((uint16_t)1 << keycode % 16);
}
}
/** \brief Gets the shift state to use when keyrepeating, required by custom shifts */
bool get_autoshift_shift_state(uint16_t keycode) {
keycode = keycode & 0xFF;
return (autoshift_shift_states[keycode / 16] & (uint16_t)1 << keycode % 16) != (uint16_t)0;
}
/** \brief Restores the shift key if it was cancelled by Auto Shift */
static void autoshift_flush_shift(void) {
autoshift_flags.holding_shift = false;
#ifdef CAPS_WORD_ENABLE
if (!is_caps_word_on())
#endif // CAPS_WORD_ENABLE
{
del_weak_mods(MOD_BIT(KC_LSFT));
}
if (autoshift_flags.cancelling_lshift) {
autoshift_flags.cancelling_lshift = false;
add_mods(MOD_BIT(KC_LSFT));
}
if (autoshift_flags.cancelling_rshift) {
autoshift_flags.cancelling_rshift = false;
add_mods(MOD_BIT(KC_RSFT));
}
send_keyboard_report();
}
/** \brief Record the press of an autoshiftable key
*
* \return Whether the record should be further processed.
*/
static bool autoshift_press(uint16_t keycode, uint16_t now, keyrecord_t *record) {
// clang-format off
if ((get_mods()
#if !defined(NO_ACTION_ONESHOT) && !defined(NO_ACTION_TAPPING)
| get_oneshot_mods()
#endif
) & (~MOD_BIT(KC_LSFT))
) {
// clang-format on
// Prevents keyrepeating unshifted value of key after using it in a key combo.
autoshift_lastkey = KC_NO;
#ifndef AUTO_SHIFT_MODIFIERS
// We can't return true here anymore because custom unshifted values are
// possible and there's no good way to tell whether the press returned
// true upon release.
set_autoshift_shift_state(keycode, false);
autoshift_press_user(keycode, false, record);
# if !defined(NO_ACTION_ONESHOT) && !defined(NO_ACTION_TAPPING)
set_oneshot_mods(get_oneshot_mods() & (~MOD_BIT(KC_LSFT)));
clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
# endif
return false;
#endif
}
// Store record to be sent to user functions if there's no release record then.
autoshift_lastrecord = *record;
autoshift_lastrecord.event.time = 0;
// clang-format off
#if defined(AUTO_SHIFT_REPEAT) || defined(AUTO_SHIFT_REPEAT_PER_KEY)
if (keycode == autoshift_lastkey &&
# ifdef AUTO_SHIFT_REPEAT_PER_KEY
get_auto_shift_repeat(autoshift_lastkey, record) &&
# endif
# if !defined(AUTO_SHIFT_NO_AUTO_REPEAT) || defined(AUTO_SHIFT_NO_AUTO_REPEAT_PER_KEY)
(
!autoshift_flags.lastshifted
# ifdef AUTO_SHIFT_NO_AUTO_REPEAT_PER_KEY
|| get_auto_shift_no_auto_repeat(autoshift_lastkey, record)
# endif
) &&
# endif
TIMER_DIFF_16(now, autoshift_time) < GET_TAPPING_TERM(autoshift_lastkey, record)
) {
// clang-format on
// Allow a tap-then-hold for keyrepeat.
if (get_mods() & MOD_BIT(KC_LSFT)) {
autoshift_flags.cancelling_lshift = true;
del_mods(MOD_BIT(KC_LSFT));
}
if (get_mods() & MOD_BIT(KC_RSFT)) {
autoshift_flags.cancelling_rshift = true;
del_mods(MOD_BIT(KC_RSFT));
}
// autoshift_shift_state doesn't need to be changed.
autoshift_press_user(autoshift_lastkey, autoshift_flags.lastshifted, record);
return false;
}
#endif
// Use physical shift state of press event to be more like normal typing.
#if !defined(NO_ACTION_ONESHOT) && !defined(NO_ACTION_TAPPING)
autoshift_flags.lastshifted = (get_mods() | get_oneshot_mods()) & MOD_BIT(KC_LSFT);
set_oneshot_mods(get_oneshot_mods() & (~MOD_BIT(KC_LSFT)));
#else
autoshift_flags.lastshifted = get_mods() & MOD_BIT(KC_LSFT);
#endif
// Record the keycode so we can simulate it later.
autoshift_lastkey = keycode;
autoshift_time = now;
autoshift_flags.in_progress = true;
#if !defined(NO_ACTION_ONESHOT) && !defined(NO_ACTION_TAPPING)
clear_oneshot_layer_state(ONESHOT_OTHER_KEY_PRESSED);
#endif
return false;
}
/** \brief Registers an autoshiftable key under the right conditions
*
* If autoshift_timeout has elapsed, register a shift and the key.
*
* If the Auto Shift key is released before the delay has elapsed, register the
* key without a shift.
*
* Called on key down with keycode=KC_NO, auto-shifted key up, and timeout.
*/
static void autoshift_end(uint16_t keycode, uint16_t now, bool matrix_trigger, keyrecord_t *record) {
if (autoshift_flags.in_progress && (keycode == autoshift_lastkey || keycode == KC_NO)) {
// Process the auto-shiftable key.
autoshift_flags.in_progress = false;
// clang-format off
autoshift_flags.lastshifted =
autoshift_flags.lastshifted
|| TIMER_DIFF_16(now, autoshift_time) >=
#ifdef AUTO_SHIFT_TIMEOUT_PER_KEY
get_autoshift_timeout(autoshift_lastkey, record)
#else
autoshift_timeout
#endif
;
// clang-format on
set_autoshift_shift_state(autoshift_lastkey, autoshift_flags.lastshifted);
if (get_mods() & MOD_BIT(KC_LSFT)) {
autoshift_flags.cancelling_lshift = true;
del_mods(MOD_BIT(KC_LSFT));
}
if (get_mods() & MOD_BIT(KC_RSFT)) {
autoshift_flags.cancelling_rshift = true;
del_mods(MOD_BIT(KC_RSFT));
}
autoshift_press_user(autoshift_lastkey, autoshift_flags.lastshifted, record);
// clang-format off
#if (defined(AUTO_SHIFT_REPEAT) || defined(AUTO_SHIFT_REPEAT_PER_KEY)) && (!defined(AUTO_SHIFT_NO_AUTO_REPEAT) || defined(AUTO_SHIFT_NO_AUTO_REPEAT_PER_KEY))
if (matrix_trigger
# ifdef AUTO_SHIFT_REPEAT_PER_KEY
&& get_auto_shift_repeat(autoshift_lastkey, record)
# endif
# ifdef AUTO_SHIFT_NO_AUTO_REPEAT_PER_KEY
&& !get_auto_shift_no_auto_repeat(autoshift_lastkey, record)
# endif
) {
// Prevents release.
return;
}
#endif
// clang-format on
#if TAP_CODE_DELAY > 0
wait_ms(TAP_CODE_DELAY);
#endif
autoshift_release_user(autoshift_lastkey, autoshift_flags.lastshifted, record);
autoshift_flush_shift();
} else {
// Release after keyrepeat.
autoshift_release_user(keycode, get_autoshift_shift_state(keycode), record);
if (keycode == autoshift_lastkey) {
// This will only fire when the key was the last auto-shiftable
// pressed. That prevents 'aaaaBBBB' then releasing a from unshifting
// later 'B's (if 'B' wasn't auto-shiftable).
autoshift_flush_shift();
}
}
// Roll the autoshift_time forward for detecting tap-and-hold.
autoshift_time = now;
}
/** \brief Simulates auto-shifted key releases when timeout is hit
*
* Can be called from \c matrix_scan_user so that auto-shifted keys are sent
* immediately after the timeout has expired, rather than waiting for the key
* to be released.
*/
void autoshift_matrix_scan(void) {
if (autoshift_flags.in_progress) {
const uint16_t now = timer_read();
if (TIMER_DIFF_16(now, autoshift_time) >=
#ifdef AUTO_SHIFT_TIMEOUT_PER_KEY
get_autoshift_timeout(autoshift_lastkey, &autoshift_lastrecord)
#else
autoshift_timeout
#endif
) {
autoshift_end(autoshift_lastkey, now, true, &autoshift_lastrecord);
}
}
}
void autoshift_toggle(void) {
autoshift_flags.enabled = !autoshift_flags.enabled;
autoshift_flush_shift();
}
void autoshift_enable(void) {
autoshift_flags.enabled = true;
}
void autoshift_disable(void) {
autoshift_flags.enabled = false;
autoshift_flush_shift();
}
#ifndef AUTO_SHIFT_NO_SETUP
void autoshift_timer_report(void) {
# ifdef SEND_STRING_ENABLE
const char *autoshift_timeout_str = get_u16_str(autoshift_timeout, ' ');
// Skip padding spaces
while (*autoshift_timeout_str == ' ') {
autoshift_timeout_str++;
}
send_string(autoshift_timeout_str);
# endif
}
#endif
bool get_autoshift_state(void) {
return autoshift_flags.enabled;
}
uint16_t get_generic_autoshift_timeout(void) {
return autoshift_timeout;
}
__attribute__((weak)) uint16_t get_autoshift_timeout(uint16_t keycode, keyrecord_t *record) {
return autoshift_timeout;
}
void set_autoshift_timeout(uint16_t timeout) {
autoshift_timeout = timeout;
}
bool process_auto_shift(uint16_t keycode, keyrecord_t *record) {
// Note that record->event.time isn't reliable, see:
// https://github.com/qmk/qmk_firmware/pull/9826#issuecomment-733559550
// clang-format off
const uint16_t now =
#if !defined(RETRO_SHIFT) || defined(NO_ACTION_TAPPING)
timer_read()
#else
(record->event.pressed) ? retroshift_time : timer_read()
#endif
;
// clang-format on
if (record->event.pressed) {
if (autoshift_flags.in_progress) {
// Evaluate previous key if there is one.
autoshift_end(KC_NO, now, false, &autoshift_lastrecord);
}
switch (keycode) {
case AS_TOGG:
autoshift_toggle();
break;
case AS_ON:
autoshift_enable();
break;
case AS_OFF:
autoshift_disable();
break;
#ifndef AUTO_SHIFT_NO_SETUP
case AS_UP:
autoshift_timeout += 5;
break;
case AS_DOWN:
autoshift_timeout -= 5;
break;
case AS_RPT:
autoshift_timer_report();
break;
#endif
}
// If Retro Shift is disabled, possible custom actions shouldn't happen.
// clang-format off
#if defined(RETRO_SHIFT) && !defined(NO_ACTION_TAPPING)
# ifdef HOLD_ON_OTHER_KEY_PRESS
const bool is_hold_on_interrupt = (IS_QK_MOD_TAP(keycode)
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
&& get_hold_on_other_key_press(keycode, record)
# endif
);
# else
const bool is_hold_on_interrupt = false;
# endif
#endif
if (IS_RETRO(keycode)
#if defined(RETRO_SHIFT) && !defined(NO_ACTION_TAPPING)
// Not tapped or #defines mean that rolls should use hold action.
&& (
record->tap.count == 0
# ifdef RETRO_TAPPING_PER_KEY
|| !get_retro_tapping(keycode, record)
# endif
|| (record->tap.interrupted && is_hold_on_interrupt))
#endif
) {
// clang-format on
autoshift_lastkey = KC_NO;
return true;
}
} else {
if (keycode == KC_LSFT) {
autoshift_flags.cancelling_lshift = false;
} else if (keycode == KC_RSFT) {
autoshift_flags.cancelling_rshift = false;
}
// Same as above (for pressed), additional checks are not needed because
// tap.count gets set to 0 in process_action
// clang-format off
else if (IS_RETRO(keycode)
#if defined(RETRO_SHIFT) && !defined(NO_ACTION_TAPPING)
&& (
record->tap.count == 0
# ifdef RETRO_TAPPING_PER_KEY
|| !get_retro_tapping(keycode, record)
# endif
)
#endif
) {
// Fixes modifiers not being applied to rolls with AUTO_SHIFT_MODIFIERS set.
#ifdef HOLD_ON_OTHER_KEY_PRESS
if (autoshift_flags.in_progress
# ifdef HOLD_ON_OTHER_KEY_PRESS_PER_KEY
&& get_hold_on_other_key_press(keycode, record)
# endif
) {
autoshift_end(KC_NO, now, false, &autoshift_lastrecord);
}
#endif
// clang-format on
return true;
}
}
if (!autoshift_flags.enabled) {
return true;
}
if (get_auto_shifted_key(keycode, record)) {
if (record->event.pressed) {
return autoshift_press(keycode, now, record);
} else {
autoshift_end(keycode, now, false, record);
return false;
}
}
// Prevent keyrepeating of older keys upon non-AS key event.
// Not commented at above returns but they serve the same function.
if (record->event.pressed) {
autoshift_lastkey = KC_NO;
}
return true;
}
#if defined(RETRO_SHIFT) && !defined(NO_ACTION_TAPPING)
// Called to record time before possible delays by action_tapping_process.
void retroshift_poll_time(keyevent_t *event) {
last_retroshift_time = retroshift_time;
retroshift_time = timer_read();
}
// Used to swap the times of Retro Shifted key and Auto Shift key that interrupted it.
void retroshift_swap_times(void) {
if (autoshift_flags.in_progress) {
autoshift_time = last_retroshift_time;
}
}
#endif
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