375 lines
13 KiB
C
375 lines
13 KiB
C
// Copyright 2021 Google LLC
|
|
// Copyright 2021 @filterpaper
|
|
// Copyright 2023 Pablo Martinez (@elpekenin) <elpekenin@elpekenin.dev>
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
// Original source: https://getreuer.info/posts/keyboards/autocorrection
|
|
|
|
#include "process_autocorrect.h"
|
|
#include <string.h>
|
|
#include "keycodes.h"
|
|
#include "quantum_keycodes.h"
|
|
#include "keycode_config.h"
|
|
#include "send_string.h"
|
|
#include "action_util.h"
|
|
|
|
#if __has_include("autocorrect_data.h")
|
|
# include "autocorrect_data.h"
|
|
#else
|
|
# pragma message "Autocorrect is using the default library."
|
|
# include "autocorrect_data_default.h"
|
|
#endif
|
|
|
|
static uint8_t typo_buffer[AUTOCORRECT_MAX_LENGTH] = {KC_SPC};
|
|
static uint8_t typo_buffer_size = 1;
|
|
|
|
/**
|
|
* @brief function for querying the enabled state of autocorrect
|
|
*
|
|
* @return true if enabled
|
|
* @return false if disabled
|
|
*/
|
|
bool autocorrect_is_enabled(void) {
|
|
return keymap_config.autocorrect_enable;
|
|
}
|
|
|
|
/**
|
|
* @brief Enables autocorrect and saves state to eeprom
|
|
*
|
|
*/
|
|
void autocorrect_enable(void) {
|
|
keymap_config.autocorrect_enable = true;
|
|
eeconfig_update_keymap(keymap_config.raw);
|
|
}
|
|
|
|
/**
|
|
* @brief Disables autocorrect and saves state to eeprom
|
|
*
|
|
*/
|
|
void autocorrect_disable(void) {
|
|
keymap_config.autocorrect_enable = false;
|
|
typo_buffer_size = 0;
|
|
eeconfig_update_keymap(keymap_config.raw);
|
|
}
|
|
|
|
/**
|
|
* @brief Toggles autocorrect's status and save state to eeprom
|
|
*
|
|
*/
|
|
void autocorrect_toggle(void) {
|
|
keymap_config.autocorrect_enable = !keymap_config.autocorrect_enable;
|
|
typo_buffer_size = 0;
|
|
eeconfig_update_keymap(keymap_config.raw);
|
|
}
|
|
|
|
/**
|
|
* @brief handler for user to override whether autocorrect should process this keypress
|
|
*
|
|
* @param keycode Keycode registered by matrix press, per keymap
|
|
* @param record keyrecord_t structure
|
|
* @param typo_buffer_size passed along to allow resetting of autocorrect buffer
|
|
* @param mods allow processing of mod status
|
|
* @return true Allow autocorection
|
|
* @return false Stop processing and escape from autocorrect.
|
|
*/
|
|
__attribute__((weak)) bool process_autocorrect_user(uint16_t *keycode, keyrecord_t *record, uint8_t *typo_buffer_size, uint8_t *mods) {
|
|
return process_autocorrect_default_handler(keycode, record, typo_buffer_size, mods);
|
|
}
|
|
|
|
/**
|
|
* @brief fallback handler for determining if autocorrect should process this keypress
|
|
* can be used by user callback to get the basic keycode being "wrapped"
|
|
*
|
|
* NOTE: These values may have been edited by user callback before getting here
|
|
*
|
|
* @param keycode Keycode registered by matrix press, per keymap
|
|
* @param record keyrecord_t structure
|
|
* @param typo_buffer_size passed along to allow resetting of autocorrect buffer
|
|
* @param mods allow processing of mod status
|
|
* @return true Allow autocorection
|
|
* @return false Stop processing and escape from autocorrect.
|
|
*/
|
|
bool process_autocorrect_default_handler(uint16_t *keycode, keyrecord_t *record, uint8_t *typo_buffer_size, uint8_t *mods) {
|
|
// See quantum_keycodes.h for reference on these matched ranges.
|
|
switch (*keycode) {
|
|
// Exclude these keycodes from processing.
|
|
case KC_LSFT:
|
|
case KC_RSFT:
|
|
case KC_CAPS:
|
|
case QK_TO ... QK_TO_MAX:
|
|
case QK_MOMENTARY ... QK_MOMENTARY_MAX:
|
|
case QK_DEF_LAYER ... QK_DEF_LAYER_MAX:
|
|
case QK_TOGGLE_LAYER ... QK_TOGGLE_LAYER_MAX:
|
|
case QK_ONE_SHOT_LAYER ... QK_ONE_SHOT_LAYER_MAX:
|
|
case QK_LAYER_TAP_TOGGLE ... QK_LAYER_TAP_TOGGLE_MAX:
|
|
case QK_LAYER_MOD ... QK_LAYER_MOD_MAX:
|
|
case QK_ONE_SHOT_MOD ... QK_ONE_SHOT_MOD_MAX:
|
|
return false;
|
|
|
|
// Mask for base keycode from shifted keys.
|
|
case QK_LSFT ... QK_LSFT + 255:
|
|
case QK_RSFT ... QK_RSFT + 255:
|
|
if (*keycode >= QK_LSFT && *keycode <= (QK_LSFT + 255)) {
|
|
*mods |= MOD_LSFT;
|
|
} else {
|
|
*mods |= MOD_RSFT;
|
|
}
|
|
*keycode = QK_MODS_GET_BASIC_KEYCODE(*keycode); // Get the basic keycode.
|
|
return true;
|
|
#ifndef NO_ACTION_TAPPING
|
|
// Exclude tap-hold keys when they are held down
|
|
// and mask for base keycode when they are tapped.
|
|
case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
|
|
# ifdef NO_ACTION_LAYER
|
|
// Exclude Layer Tap, if layers are disabled
|
|
// but action tapping is still enabled.
|
|
return false;
|
|
# else
|
|
// Exclude hold keycode
|
|
if (!record->tap.count) {
|
|
return false;
|
|
}
|
|
*keycode = QK_LAYER_TAP_GET_TAP_KEYCODE(*keycode);
|
|
break;
|
|
# endif
|
|
case QK_MOD_TAP ... QK_MOD_TAP_MAX:
|
|
// Exclude hold keycode
|
|
if (!record->tap.count) {
|
|
return false;
|
|
}
|
|
*keycode = QK_MOD_TAP_GET_TAP_KEYCODE(*keycode);
|
|
break;
|
|
#else
|
|
case QK_MOD_TAP ... QK_MOD_TAP_MAX:
|
|
case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
|
|
// Exclude if disabled
|
|
return false;
|
|
#endif
|
|
// Exclude swap hands keys when they are held down
|
|
// and mask for base keycode when they are tapped.
|
|
case QK_SWAP_HANDS ... QK_SWAP_HANDS_MAX:
|
|
#ifdef SWAP_HANDS_ENABLE
|
|
// Note: IS_SWAP_HANDS_KEYCODE() actually tests for the special action keycodes like SH_TOGG, SH_TT, ...,
|
|
// which currently overlap the SH_T(kc) range.
|
|
if (IS_SWAP_HANDS_KEYCODE(*keycode)
|
|
# ifndef NO_ACTION_TAPPING
|
|
|| !record->tap.count
|
|
# endif // NO_ACTION_TAPPING
|
|
) {
|
|
return false;
|
|
}
|
|
*keycode = QK_SWAP_HANDS_GET_TAP_KEYCODE(*keycode);
|
|
break;
|
|
#else
|
|
// Exclude if disabled
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
// Disable autocorrect while a mod other than shift is active.
|
|
if ((*mods & ~MOD_MASK_SHIFT) != 0) {
|
|
*typo_buffer_size = 0;
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief handling for when autocorrection has been triggered
|
|
*
|
|
* @param backspaces number of characters to remove
|
|
* @param str pointer to PROGMEM string to replace mistyped seletion with
|
|
* @param typo the wrong string that triggered a correction
|
|
* @param correct what it would become after the changes
|
|
* @return true apply correction
|
|
* @return false user handled replacement
|
|
*/
|
|
__attribute__((weak)) bool apply_autocorrect(uint8_t backspaces, const char *str, char *typo, char *correct) {
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Process handler for autocorrect feature
|
|
*
|
|
* @param keycode Keycode registered by matrix press, per keymap
|
|
* @param record keyrecord_t structure
|
|
* @return true Continue processing keycodes, and send to host
|
|
* @return false Stop processing keycodes, and don't send to host
|
|
*/
|
|
bool process_autocorrect(uint16_t keycode, keyrecord_t *record) {
|
|
uint8_t mods = get_mods();
|
|
#ifndef NO_ACTION_ONESHOT
|
|
mods |= get_oneshot_mods();
|
|
#endif
|
|
|
|
if ((keycode >= QK_AUTOCORRECT_ON && keycode <= QK_AUTOCORRECT_TOGGLE) && record->event.pressed) {
|
|
if (keycode == QK_AUTOCORRECT_ON) {
|
|
autocorrect_enable();
|
|
} else if (keycode == QK_AUTOCORRECT_OFF) {
|
|
autocorrect_disable();
|
|
} else if (keycode == QK_AUTOCORRECT_TOGGLE) {
|
|
autocorrect_toggle();
|
|
} else {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
if (!keymap_config.autocorrect_enable) {
|
|
typo_buffer_size = 0;
|
|
return true;
|
|
}
|
|
|
|
if (!record->event.pressed) {
|
|
return true;
|
|
}
|
|
|
|
// autocorrect keycode verification and extraction
|
|
if (!process_autocorrect_user(&keycode, record, &typo_buffer_size, &mods)) {
|
|
return true;
|
|
}
|
|
|
|
// keycode buffer check
|
|
switch (keycode) {
|
|
case KC_A ... KC_Z:
|
|
// process normally
|
|
break;
|
|
case KC_1 ... KC_0:
|
|
case KC_TAB ... KC_SEMICOLON:
|
|
case KC_GRAVE ... KC_SLASH:
|
|
// Set a word boundary if space, period, digit, etc. is pressed.
|
|
keycode = KC_SPC;
|
|
break;
|
|
case KC_ENTER:
|
|
// Behave more conservatively for the enter key. Reset, so that enter
|
|
// can't be used on a word ending.
|
|
typo_buffer_size = 0;
|
|
keycode = KC_SPC;
|
|
break;
|
|
case KC_BSPC:
|
|
// Remove last character from the buffer.
|
|
if (typo_buffer_size > 0) {
|
|
--typo_buffer_size;
|
|
}
|
|
return true;
|
|
case KC_QUOTE:
|
|
// Treat " (shifted ') as a word boundary.
|
|
if ((mods & MOD_MASK_SHIFT) != 0) {
|
|
keycode = KC_SPC;
|
|
}
|
|
break;
|
|
default:
|
|
// Clear state if some other non-alpha key is pressed.
|
|
typo_buffer_size = 0;
|
|
return true;
|
|
}
|
|
|
|
// Rotate oldest character if buffer is full.
|
|
if (typo_buffer_size >= AUTOCORRECT_MAX_LENGTH) {
|
|
memmove(typo_buffer, typo_buffer + 1, AUTOCORRECT_MAX_LENGTH - 1);
|
|
typo_buffer_size = AUTOCORRECT_MAX_LENGTH - 1;
|
|
}
|
|
|
|
// Append `keycode` to buffer.
|
|
typo_buffer[typo_buffer_size++] = keycode;
|
|
// Return if buffer is smaller than the shortest word.
|
|
if (typo_buffer_size < AUTOCORRECT_MIN_LENGTH) {
|
|
return true;
|
|
}
|
|
|
|
// Check for typo in buffer using a trie stored in `autocorrect_data`.
|
|
uint16_t state = 0;
|
|
uint8_t code = pgm_read_byte(autocorrect_data + state);
|
|
for (int8_t i = typo_buffer_size - 1; i >= 0; --i) {
|
|
uint8_t const key_i = typo_buffer[i];
|
|
|
|
if (code & 64) { // Check for match in node with multiple children.
|
|
code &= 63;
|
|
for (; code != key_i; code = pgm_read_byte(autocorrect_data + (state += 3))) {
|
|
if (!code) return true;
|
|
}
|
|
// Follow link to child node.
|
|
state = (pgm_read_byte(autocorrect_data + state + 1) | pgm_read_byte(autocorrect_data + state + 2) << 8);
|
|
// Check for match in node with single child.
|
|
} else if (code != key_i) {
|
|
return true;
|
|
} else if (!(code = pgm_read_byte(autocorrect_data + (++state)))) {
|
|
++state;
|
|
}
|
|
|
|
// Stop if `state` becomes an invalid index. This should not normally
|
|
// happen, it is a safeguard in case of a bug, data corruption, etc.
|
|
if (state >= DICTIONARY_SIZE) {
|
|
return true;
|
|
}
|
|
|
|
code = pgm_read_byte(autocorrect_data + state);
|
|
|
|
if (code & 128) { // A typo was found! Apply autocorrect.
|
|
const uint8_t backspaces = (code & 63) + !record->event.pressed;
|
|
const char * changes = (const char *)(autocorrect_data + state + 1);
|
|
|
|
/* Gather info about the typo'd word
|
|
*
|
|
* Since buffer may contain several words, delimited by spaces, we
|
|
* iterate from the end to find the start and length of the typo
|
|
*/
|
|
char typo[AUTOCORRECT_MAX_LENGTH + 1] = {0}; // extra char for null terminator
|
|
|
|
uint8_t typo_len = 0;
|
|
uint8_t typo_start = 0;
|
|
bool space_last = typo_buffer[typo_buffer_size - 1] == KC_SPC;
|
|
for (uint8_t i = typo_buffer_size; i > 0; --i) {
|
|
// stop counting after finding space (unless it is the last thing)
|
|
if (typo_buffer[i - 1] == KC_SPC && i != typo_buffer_size) {
|
|
typo_start = i;
|
|
break;
|
|
}
|
|
|
|
++typo_len;
|
|
}
|
|
|
|
// when detecting 'typo:', reduce the length of the string by one
|
|
if (space_last) {
|
|
--typo_len;
|
|
}
|
|
|
|
// convert buffer of keycodes into a string
|
|
for (uint8_t i = 0; i < typo_len; ++i) {
|
|
typo[i] = typo_buffer[typo_start + i] - KC_A + 'a';
|
|
}
|
|
|
|
/* Gather the corrected word
|
|
*
|
|
* A) Correction of 'typo:' -- Code takes into account
|
|
* an extra backspace to delete the space (which we dont copy)
|
|
* for this reason the offset is correct to "skip" the null terminator
|
|
*
|
|
* B) When correcting 'typo' -- Need extra offset for terminator
|
|
*/
|
|
char correct[AUTOCORRECT_MAX_LENGTH + 10] = {0}; // let's hope this is big enough
|
|
|
|
uint8_t offset = space_last ? backspaces : backspaces + 1;
|
|
strcpy(correct, typo);
|
|
strcpy_P(correct + typo_len - offset, changes);
|
|
|
|
if (apply_autocorrect(backspaces, changes, typo, correct)) {
|
|
for (uint8_t i = 0; i < backspaces; ++i) {
|
|
tap_code(KC_BSPC);
|
|
}
|
|
send_string_P(changes);
|
|
}
|
|
|
|
if (keycode == KC_SPC) {
|
|
typo_buffer[0] = KC_SPC;
|
|
typo_buffer_size = 1;
|
|
return true;
|
|
} else {
|
|
typo_buffer_size = 0;
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|