Merge remote-tracking branch 'origin/master' into develop

45 files changed, 815 insertions, 187 deletions

diff --git a/keyboards/handwired/tractyl_manuform/5x6_right/f411/f411.c b/keyboards/handwired/tractyl_manuform/5x6_right/f411/f411.c
index 700b0685f2..5cd269e311 100644
--- a/keyboards/handwired/tractyl_manuform/5x6_right/f411/f411.c
+++ b/keyboards/handwired/tractyl_manuform/5x6_right/f411/f411.c
@@ -16,7 +16,7 @@
 
 #include "f411.h"
 
-void matrix_init_sub_kb(void) { setPinInputHigh(A0); }
+void keyboard_pre_init_sub(void) { setPinInputHigh(A0); }
 
 void matrix_scan_sub_kb(void) {
     if (!readPin(A0)) {
@@ -24,6 +24,33 @@ void matrix_scan_sub_kb(void) {
     }
 }
 
+void bootmagic_lite(void) {
+    // We need multiple scans because debouncing can't be turned off.
+    matrix_scan();
+#if defined(DEBOUNCE) && DEBOUNCE > 0
+    wait_ms(DEBOUNCE * 2);
+#else
+    wait_ms(30);
+#endif
+    matrix_scan();
+
+    uint8_t row = BOOTMAGIC_LITE_ROW;
+    uint8_t col = BOOTMAGIC_LITE_COLUMN;
+
+#if defined(SPLIT_KEYBOARD) && defined(BOOTMAGIC_LITE_ROW_RIGHT) && defined(BOOTMAGIC_LITE_COLUMN_RIGHT)
+    if (!is_keyboard_left()) {
+        row = BOOTMAGIC_LITE_ROW_RIGHT;
+        col = BOOTMAGIC_LITE_COLUMN_RIGHT;
+    }
+#endif
+
+    if (matrix_get_row(row) & (1 << col) || !readPin(A0)) {
+        eeconfig_disable();
+        bootloader_jump();
+    }
+}
+
+
 #ifdef USB_VBUS_PIN
 bool usb_vbus_state(void) {
     setPinInputLow(USB_VBUS_PIN);
diff --git a/keyboards/handwired/tractyl_manuform/5x6_right/f411/readme.md b/keyboards/handwired/tractyl_manuform/5x6_right/f411/readme.md
index b387435122..f732295ba3 100644
--- a/keyboards/handwired/tractyl_manuform/5x6_right/f411/readme.md
+++ b/keyboards/handwired/tractyl_manuform/5x6_right/f411/readme.md
@@ -1,7 +1,7 @@
 # Drashna's Blackpill Tractyl Manuform (5x6) with a right side trackball
 
 * System Timer on TIM5
-* ~~VBUS mod, using PB10~~ (*doesn't seem to work for me*)
+* VBUS mod, using PB10 -- does work, but not on my tractyl... bad soldering probably
 * Split Hand Pin, using PC14
 * Full Duplex Serial/USART using PA2 and PA3 on USART2
 * PWM Audio using PB1 and TIM3 and GPT on TIM4
@@ -12,7 +12,8 @@
 * SSD1306 OLED display (128x64) using PB8-PB9 on I2C1
 * Pull-up resistor (22k) on PA10 to fix reset issue.
 * Pull-up resistor (5.1k) on PA1 for WS2812 LED support, and wire it's VCC to the 5V pin.
-* Pins PA9, PA11, A12 are not useable because they're used for USB connection, and can't be shared. 
+* Pins PA9 is meant for VBUS sense, and has an internal pulldown resistor. A 5.1k pullup resistor can work (but should be avoided)
+* Pins PA11 and A12 are not useable because they're used for USB connection, and can't be shared. 
 * Pin PB2 is used by BOOT1, and is unusable
 
 ## Keyboard Info
diff --git a/keyboards/handwired/tractyl_manuform/5x6_right/keymaps/drashna/keymap.c b/keyboards/handwired/tractyl_manuform/5x6_right/keymaps/drashna/keymap.c
index f893a8cc41..958f694172 100644
--- a/keyboards/handwired/tractyl_manuform/5x6_right/keymaps/drashna/keymap.c
+++ b/keyboards/handwired/tractyl_manuform/5x6_right/keymaps/drashna/keymap.c
@@ -16,11 +16,6 @@
 
 #include "drashna.h"
 
-enum tractyl_keycodes {
-    KC_ACCEL = NEW_SAFE_RANGE,
-};
-
-bool enable_acceleration = false;
 // clang-format off
 #define LAYOUT_5x6_right_wrapper(...) LAYOUT_5x6_right(__VA_ARGS__)
 #define LAYOUT_5x6_right_base( \
@@ -129,10 +124,10 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
         VRSN,    _________________ADJUST_L1_________________,                      _________________ADJUST_R1_________________, EEP_RST,
         KEYLOCK, _________________ADJUST_L2_________________,                      _________________ADJUST_R2_________________, TG_MODS,
         UC_MOD,  _________________ADJUST_L3_________________,                      _________________ADJUST_R3_________________, KC_MPLY,
-                          HPT_DWLI, HPT_DWLD,                                                        TG_GAME, TG_DBLO,
-                                            HPT_TOG, HPT_BUZ,                               KC_NUKE,
+                   TG(_DIABLOII), AUTO_CTN,                                                          TG_GAME, TG_DBLO,
+                                            _______, _______,                               KC_NUKE,
                                                      _______, _______,             _______,
-                                                     _______, TG(_DIABLOII),KC_NUKE, _______
+                                                     _______, _______,    KC_NUKE, _______
     ),
 };
 
@@ -169,116 +164,6 @@ bool encoder_update_user(uint8_t index, bool clockwise) {
 }
 #endif
 
-#ifdef POINTING_DEVICE_ENABLE
-static uint16_t mouse_timer           = 0;
-static uint16_t mouse_debounce_timer  = 0;
-static uint8_t  mouse_keycode_tracker = 0;
-bool            tap_toggling          = false;
-
-#    ifdef TAPPING_TERM_PER_KEY
-#        define TAP_CHECK get_tapping_term(KC_BTN1, NULL)
-#    else
-#        ifndef TAPPING_TERM
-#            define TAPPING_TERM 200
-#        endif
-#        define TAP_CHECK TAPPING_TERM
-#    endif
-
-report_mouse_t pointing_device_task_user(report_mouse_t mouse_report) {
-    int8_t x = mouse_report.x, y = mouse_report.y;
-    mouse_report.x = 0;
-    mouse_report.y = 0;
-
-    if (x != 0 && y != 0) {
-        mouse_timer = timer_read();
-#    ifdef OLED_ENABLE
-        oled_timer = timer_read32();
-#    endif
-        if (timer_elapsed(mouse_debounce_timer) > TAP_CHECK) {
-            if (enable_acceleration) {
-                x = (x > 0 ? x * x / 16 + x : -x * x / 16 + x);
-                y = (y > 0 ? y * y / 16 + y : -y * y / 16 + y);
-            }
-            mouse_report.x = x;
-            mouse_report.y = y;
-            if (!layer_state_is(_MOUSE)) {
-                layer_on(_MOUSE);
-            }
-        }
-    }
-    return mouse_report;
-}
-
-void matrix_scan_keymap(void) {
-    if (timer_elapsed(mouse_timer) > 650 && layer_state_is(_MOUSE) && !mouse_keycode_tracker && !tap_toggling) {
-        layer_off(_MOUSE);
-    }
-    if (tap_toggling) {
-        if (!layer_state_is(_MOUSE)) {
-            layer_on(_MOUSE);
-        }
-    }
-}
-
-bool process_record_keymap(uint16_t keycode, keyrecord_t* record) {
-    switch (keycode) {
-        case TT(_MOUSE):
-            if (record->event.pressed) {
-                mouse_keycode_tracker++;
-            } else {
-#    if TAPPING_TOGGLE != 0
-                if (record->tap.count == TAPPING_TOGGLE) {
-                    tap_toggling ^= 1;
-#        if TAPPING_TOGGLE == 1
-                    if (!tap_toggling) mouse_keycode_tracker -= record->tap.count + 1;
-#        else
-                    if (!tap_toggling) mouse_keycode_tracker -= record->tap.count;
-#        endif
-                } else {
-                    mouse_keycode_tracker--;
-                }
-#    endif
-            }
-            mouse_timer = timer_read();
-            break;
-        case TG(_MOUSE):
-            if (record->event.pressed) {
-                tap_toggling ^= 1;
-            }
-            break;
-        case MO(_MOUSE):
-        case DPI_CONFIG:
-        case KC_MS_UP ... KC_MS_WH_RIGHT:
-            record->event.pressed ? mouse_keycode_tracker++ : mouse_keycode_tracker--;
-            mouse_timer = timer_read();
-        case KC_ACCEL:
-            enable_acceleration = record->event.pressed;
-            break;
-        default:
-            if (IS_NOEVENT(record->event)) break;
-            if ((keycode >= QK_LAYER_TAP && keycode <= QK_LAYER_TAP_MAX) && (((keycode >> 0x8) & 0xF) == _MOUSE)) {
-                record->event.pressed ? mouse_keycode_tracker++ : mouse_keycode_tracker--;
-                mouse_timer = timer_read();
-                break;
-            }
-            if (layer_state_is(_MOUSE) && !mouse_keycode_tracker) {
-                layer_off(_MOUSE);
-            }
-            mouse_keycode_tracker = 0;
-            mouse_debounce_timer  = timer_read();
-            break;
-    }
-    return true;
-}
-
-layer_state_t layer_state_set_keymap(layer_state_t state) {
-    if (layer_state_cmp(state, _GAMEPAD) || layer_state_cmp(state, _DIABLO)) {
-        state |= ((layer_state_t)1 << _MOUSE);
-    }
-    return state;
-}
-#endif
-
 #ifdef OLED_ENABLE
 // WPM-responsive animation stuff here
 #    define SLEEP_FRAMES 2
diff --git a/keyboards/handwired/tractyl_manuform/tm_sync.c b/keyboards/handwired/tractyl_manuform/tm_sync.c
index 733f09a22e..549a17a22f 100644
--- a/keyboards/handwired/tractyl_manuform/tm_sync.c
+++ b/keyboards/handwired/tractyl_manuform/tm_sync.c
@@ -1,5 +1,6 @@
 /* Copyright 2020 Christopher Courtney, aka Drashna Jael're  (@drashna) <drashna@live.com>
- *
+ * Copyright 2021 Dasky (@daskygit)
+
  * 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
diff --git a/keyboards/handwired/tractyl_manuform/tractyl_manuform.c b/keyboards/handwired/tractyl_manuform/tractyl_manuform.c
index 4b36fab54f..6095bfb7e2 100644
--- a/keyboards/handwired/tractyl_manuform/tractyl_manuform.c
+++ b/keyboards/handwired/tractyl_manuform/tractyl_manuform.c
@@ -70,6 +70,7 @@ bool process_record_kb(uint16_t keycode, keyrecord_t* record) {
     return true;
 }
 __attribute__((weak)) void keyboard_pre_init_sync(void) {}
+__attribute__((weak)) void keyboard_pre_init_sub(void) {}
 void                       keyboard_pre_init_kb(void) {
     // debug_enable  = true;
     // debug_matrix  = true;
@@ -82,6 +83,7 @@ void                       keyboard_pre_init_kb(void) {
     writePin(DEBUG_LED_PIN, !debug_enable);
 #endif
 
+    keyboard_pre_init_sub();
     keyboard_pre_init_sync();
     keyboard_pre_init_user();
 }
diff --git a/keyboards/keebio/iris/keymaps/drashna/rules.mk b/keyboards/keebio/iris/keymaps/drashna/rules.mk
index 41c67b573d..ca140d76ce 100644
--- a/keyboards/keebio/iris/keymaps/drashna/rules.mk
+++ b/keyboards/keebio/iris/keymaps/drashna/rules.mk
@@ -1,17 +1,17 @@
-BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
-MOUSEKEY_ENABLE   = no       # Mouse keys(+4700)
-EXTRAKEY_ENABLE   = yes       # Audio control and System control(+450)
-CONSOLE_ENABLE    = no         # Console for debug(+400)
-COMMAND_ENABLE    = no        # Commands for debug and configuration
-TAP_DANCE_ENABLE  = no
-RGBLIGHT_ENABLE   = yes
-AUDIO_ENABLE      = no
-NKRO_ENABLE       = yes
-BACKLIGHT_ENABLE  = no
-SWAP_HANDS_ENABLE = no
-SPACE_CADET_ENABLE = no
-
-INDICATOR_LIGHTS  = no
-RGBLIGHT_STARTUP_ANIMATION = no
-
+BOOTMAGIC_ENABLE   = no       # Enable Bootmagic Lite
+MOUSEKEY_ENABLE    = no       # Mouse keys
+EXTRAKEY_ENABLE    = yes      # Audio control and System control
+CONSOLE_ENABLE     = no       # Console for debug
+COMMAND_ENABLE     = no       # Commands for debug and configuration
+TAP_DANCE_ENABLE   = no
+RGBLIGHT_ENABLE    = yes
+AUDIO_ENABLE       = no
+NKRO_ENABLE        = yes
+BACKLIGHT_ENABLE   = no
+SWAP_HANDS_ENABLE  = no
 BOOTLOADER        = qmk-dfu
+
+INDICATOR_LIGHTS            = no
+RGBLIGHT_STARTUP_ANIMATION  = no
+CUSTOM_UNICODE_ENABLE       = no
+CUSTOM_SPLIT_TRANSPORT_SYNC = no
diff --git a/keyboards/moonlander/keymaps/drashna/keymap.c b/keyboards/moonlander/keymaps/drashna/keymap.c
index cd53b1e100..1b5280e742 100644
--- a/keyboards/moonlander/keymaps/drashna/keymap.c
+++ b/keyboards/moonlander/keymaps/drashna/keymap.c
@@ -110,7 +110,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
         VRSN,    _________________ADJUST_L1_________________, TG(_DIABLOII),  _______, _________________ADJUST_R1_________________, EEP_RST,
         KEYLOCK, _________________ADJUST_L2_________________, _______,        _______, _________________ADJUST_R2_________________, RGB_IDL,
         UC_MOD,  _________________ADJUST_L3_________________,                          _________________ADJUST_R3_________________, TG_MODS,
-        _______, _______, _______, _______, _______,          _______,        _______,          _______, _______, _______, _______, KC_PAUS,
+        _______, _______, _______, _______, _______,          _______,        _______,          _______, _______, _______, _______, AUTO_CTN,
                                             _______, _______, _______,        _______, _______, _______
     ),
 };
diff --git a/keyboards/orthodox/keymaps/drashna/rules.mk b/keyboards/orthodox/keymaps/drashna/rules.mk
index 6f72712d84..9637d3b395 100644
--- a/keyboards/orthodox/keymaps/drashna/rules.mk
+++ b/keyboards/orthodox/keymaps/drashna/rules.mk
@@ -11,6 +11,6 @@ SPACE_CADET_ENABLE = no
 
 INDICATOR_LIGHTS  = yes
 RGBLIGHT_STARTUP_ANIMATION = yes
-
+CUSTOM_UNICODE_ENABLE = no
 
 BOOTLOADER        = qmk-dfu
diff --git a/keyboards/splitkb/zima/keymaps/drashna/config.h b/keyboards/splitkb/zima/keymaps/drashna/config.h
index 8d0908182e..b4457ec4b8 100644
--- a/keyboards/splitkb/zima/keymaps/drashna/config.h
+++ b/keyboards/splitkb/zima/keymaps/drashna/config.h
@@ -17,7 +17,7 @@
 
 #pragma once
 
-#define OLED_FONT_H "users/drashna/drashna_font.h"
+#define OLED_FONT_H "users/drashna/oled/drashna_font.h"
 #define OLED_UPDATE_INTERVAL 15
 #define OLED_DISABLE_TIMEOUT
 #define OLED_FONT_END 255
diff --git a/layouts/community/ergodox/drashna/rules.mk b/layouts/community/ergodox/drashna/rules.mk
index 853f1efd24..61b6263071 100644
--- a/layouts/community/ergodox/drashna/rules.mk
+++ b/layouts/community/ergodox/drashna/rules.mk
@@ -1,4 +1,4 @@
-BOOTMAGIC_ENABLE = yes      # Enable Bootmagic Lite
+BOOTMAGIC_ENABLE   = yes      # Enable Bootmagic Lite
 TAP_DANCE_ENABLE   = no
 COMMAND_ENABLE     = no  # Commands for debug and configuration
 CONSOLE_ENABLE     = no
@@ -9,12 +9,12 @@ ifeq ($(strip $(KEYBOARD)), ergodox_ez)
     RGB_MATRIX_ENABLE          = yes
     INDICATOR_LIGHTS           = no
     RGBLIGHT_STARTUP_ANIMATION = yes
-    PIMORONI_TRACKBALL_ENABLE  = yes
+    PIMORONI_TRACKBALL_ENABLE  = no
     MOUSEKEY_ENABLE            = no
 endif
 
-UNICODE_ENABLE     = no
-UNICDOEMAP_ENABLE  = no
-
+UNICODE_ENABLE        = no
+UNICDOEMAP_ENABLE     = no
+CUSTOM_UNICODE_ENABLE = no
 
 DEBOUNCE_TYPE     = sym_eager_pr
diff --git a/layouts/community/ortho_5x12/drashna/rules.mk b/layouts/community/ortho_5x12/drashna/rules.mk
index 69a025cc03..98ac829092 100644
--- a/layouts/community/ortho_5x12/drashna/rules.mk
+++ b/layouts/community/ortho_5x12/drashna/rules.mk
@@ -14,4 +14,5 @@ ifeq ($(strip $(KEYBOARD)), fractal)
     RGBLIGHT_ENABLE             = yes
     RGBLIGHT_STARTUP_ANIMATION  = yes
     BOOTLOADER                  = qmk-dfu
+    CUSTOM_UNICODE_ENABLE       = no
 endif
diff --git a/layouts/community/split_3x6_3/drashna/rules.mk b/layouts/community/split_3x6_3/drashna/rules.mk
index edc9304fec..cf2dfbdc88 100644
--- a/layouts/community/split_3x6_3/drashna/rules.mk
+++ b/layouts/community/split_3x6_3/drashna/rules.mk
@@ -32,6 +32,7 @@ ifeq ($(strip $(CTPC)), yes)
     SWAP_HANDS_ENABLE = yes
     WPM_ENABLE = yes
 else
+    CUSTOM_UNICODE_ENABLE = no
     BOOTLOADER = qmk-hid
     BOOTLOADER_SIZE = 512
 endif
diff --git a/users/drashna/config.h b/users/drashna/config.h
index 8b5d5ba937..cc8f9ac83c 100644
--- a/users/drashna/config.h
+++ b/users/drashna/config.h
@@ -77,7 +77,7 @@
 #    endif
 #endif  // !AUDIO_ENABLE
 
-#define UNICODE_SELECTED_MODES UC_WIN, UC_MAC
+#define UNICODE_SELECTED_MODES UC_WINC, UC_MAC
 
 #ifdef RGBLIGHT_ENABLE
 #    define RGBLIGHT_SLEEP
@@ -200,7 +200,7 @@
 #    ifdef OLED_FONT_H
 #        undef OLED_FONT_H
 #    endif
-#    define OLED_FONT_H   "drashna_font.h"
+#    define OLED_FONT_H   "oled/drashna_font.h"
 #    define OLED_FONT_END 255
 // #    define OLED_FONT_5X5
 // #    define OLED_FONT_AZTECH
diff --git a/users/drashna/drashna.c b/users/drashna/drashna.c
index 7e07a2c7c5..9c1233ed90 100644
--- a/users/drashna/drashna.c
+++ b/users/drashna/drashna.c
@@ -70,7 +70,9 @@ void                       matrix_init_user(void) {
     DDRB &= ~(1 << 0);
     PORTB &= ~(1 << 0);
 #endif
-
+#ifdef CUSTOM_UNICODE_ENABLE
+    matrix_init_unicode();
+#endif
     matrix_init_secret();
     matrix_init_keymap();
 }
@@ -152,6 +154,9 @@ void                       matrix_scan_user(void) {
 #if defined(RGB_MATRIX_ENABLE)
     matrix_scan_rgb_matrix();
 #endif
+#if defined(POINTING_DEVICE_ENABLE)
+    matrix_scan_pointing();
+#endif
 
     matrix_scan_secret();
 
@@ -171,6 +176,9 @@ layer_state_t                       layer_state_set_user(layer_state_t state) {
     }
 
     state = update_tri_layer_state(state, _RAISE, _LOWER, _ADJUST);
+#if defined(POINTING_DEVICE_ENABLE)
+    state = layer_state_set_pointing(state);
+#endif
 #if defined(RGBLIGHT_ENABLE)
     state = layer_state_set_rgb_light(state);
 #endif  // RGBLIGHT_ENABLE
diff --git a/users/drashna/drashna.h b/users/drashna/drashna.h
index 6a45141d9a..7bcae881e4 100644
--- a/users/drashna/drashna.h
+++ b/users/drashna/drashna.h
@@ -18,25 +18,25 @@
 #include QMK_KEYBOARD_H
 
 #include "eeprom.h"
-#include "wrappers.h"
-#include "process_records.h"
+#include "keyrecords/wrappers.h"
+#include "keyrecords/process_records.h"
 #ifdef TAP_DANCE_ENABLE
-#    include "tap_dances.h"
+#    include "keyrecords/tap_dances.h"
 #endif  // TAP_DANCE_ENABLE
 #if defined(RGBLIGHT_ENABLE)
-#    include "rgb_stuff.h"
+#    include "rgb/rgb_stuff.h"
 #endif
 #if defined(RGB_MATRIX_ENABLE)
-#    include "rgb_matrix_stuff.h"
+#    include "rgb/rgb_matrix_stuff.h"
 #endif
 #if defined(OLED_ENABLE)
-#    include "oled_stuff.h"
-#endif
-#if defined(PIMORONI_TRACKBALL_ENABLE)
-#    include "drivers/sensors/pimoroni_trackball.h"
+#    include "oled/oled_stuff.h"
 #endif
 #ifdef SPLIT_KEYBOARD
-#    include "transport_sync.h"
+#    include "split/transport_sync.h"
+#endif
+#ifdef POINTING_DEVICE_ENABLE
+#    include "pointing/pointing.h"
 #endif
 
 /* Define layer names */
@@ -113,6 +113,7 @@ typedef union {
         bool    nuke_switch          :1;
         bool    swapped_numbers      :1;
         bool    rgb_matrix_idle_anim :1;
+        bool    autocorrection       :1;
     };
 } userspace_config_t;
 // clang-format on
diff --git a/users/drashna/keyrecords/autocorrection/autocorrection.c b/users/drashna/keyrecords/autocorrection/autocorrection.c
new file mode 100644
index 0000000000..7c8c28c674
--- /dev/null
+++ b/users/drashna/keyrecords/autocorrection/autocorrection.c
@@ -0,0 +1,143 @@
+// Copyright 2021 Google LLC
+// Copyright 2022 @filterpaper
+// SPDX-License-Identifier: Apache-2.0
+// Original source: https://getreuer.info/posts/keyboards/autocorrection
+
+#include "autocorrection.h"
+#include <string.h>
+
+#if __has_include("autocorrection_data.h")
+#    include "autocorrection_data.h"
+#    if AUTOCORRECTION_MIN_LENGTH < 4
+#        error Minimum Length is too short and may cause overflows
+#    endif
+
+bool process_autocorrection(uint16_t keycode, keyrecord_t* record) {
+    static uint8_t typo_buffer[AUTOCORRECTION_MAX_LENGTH] = {KC_SPC};
+    static uint8_t typo_buffer_size                       = 1;
+
+    if (keycode == AUTO_CTN) {
+        if (record->event.pressed) {
+            typo_buffer_size = 0;
+            userspace_config.autocorrection ^= 1;
+            eeconfig_update_user(userspace_config.raw);
+        }
+        return false;
+    }
+
+    if (!userspace_config.autocorrection) {
+        typo_buffer_size = 0;
+        return true;
+    }
+
+    switch (keycode) {
+        case KC_LSFT:
+        case KC_RSFT:
+            return true;
+#    ifndef NO_ACTION_TAPPING
+        case QK_MOD_TAP ... QK_MOD_TAP_MAX:
+            if (((keycode >> 8) & 0xF) == MOD_LSFT) {
+                return true;
+            }
+#        ifndef NO_ACTION_LAYER
+        case QK_LAYER_TAP ... QK_LAYER_TAP_MAX:
+#        endif
+            if (record->event.pressed || !record->tap.count) {
+                return true;
+            }
+            keycode &= 0xFF;
+            break;
+#    endif
+#    ifndef NO_ACTION_ONESHOT
+        case QK_ONE_SHOT_MOD ... QK_ONE_SHOT_MOD_MAX:
+            if ((keycode & 0xF) == MOD_LSFT) {
+                return true;
+            }
+#    endif
+        default:
+            if (!record->event.pressed) {
+                return true;
+            }
+    }
+
+    // Subtract buffer for Backspace key, reset for other non-alpha.
+    if (!(KC_A <= keycode && keycode <= KC_Z)) {
+        if (keycode == KC_BSPC) {
+            // Remove last character from the buffer.
+            if (typo_buffer_size > 0) {
+                --typo_buffer_size;
+            }
+            return true;
+        } else if (KC_1 <= keycode && keycode <= KC_SLSH && keycode != KC_ESC) {
+            // Set a word boundary if space, period, digit, etc. is pressed.
+            // Behave more conservatively for the enter key. Reset, so that enter
+            // can't be used on a word ending.
+            if (keycode == KC_ENT) {
+                typo_buffer_size = 0;
+            }
+            keycode = KC_SPC;
+        } else {
+            // 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 >= AUTOCORRECTION_MAX_LENGTH) {
+        memmove(typo_buffer, typo_buffer + 1, AUTOCORRECTION_MAX_LENGTH - 1);
+        typo_buffer_size = AUTOCORRECTION_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 < AUTOCORRECTION_MIN_LENGTH) {
+        return true;
+    }
+
+    // Check for typo in buffer using a trie stored in `autocorrection_data`.
+    uint16_t state = 0;
+    uint8_t  code  = pgm_read_byte(autocorrection_data + state);
+    for (uint8_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(autocorrection_data + (state += 3))) {
+                if (!code) return true;
+            }
+            // Follow link to child node.
+            state = (pgm_read_byte(autocorrection_data + state + 1) | pgm_read_byte(autocorrection_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(autocorrection_data + (++state)))) {
+            ++state;
+        }
+
+        code = pgm_read_byte(autocorrection_data + state);
+
+        if (code &am