qmk/common/keymap.h

/* Copyright 2022 Christoph Cullmann
 *
 * 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/>.
 */

// our layers
enum my_layers {
  _BASE,
  _NUM,
  _NAV,
  _SYM,
  _FN,
  _MAGIC
};

// our keymap
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {

[_BASE] = LAYOUT(
    KC_W,         KC_L,         KC_Y,         KC_P,         KC_B,         KC_Z,         KC_F,         OSL(_MAGIC),     KC_U,         KC_QUOT,
    KC_C,         LALT_T(KC_R), LCTL_T(KC_S), LSFT_T(KC_T), LGUI_T(KC_G), RGUI_T(KC_M), RSFT_T(KC_N), RCTL_T(KC_O),    LALT_T(KC_I), KC_A,
    KC_Q,         KC_J,         LSFT_T(KC_V), RALT_T(KC_D), KC_K,         KC_X,         RALT_T(KC_H), RSFT_T(KC_SLSH), KC_COMM,      KC_DOT,
                                              MO(_NUM),     KC_SPC,       KC_E,         MO(_NAV)
),

[_NUM] = LAYOUT(
    TO(_BASE),    C(KC_X),      C(KC_C),      C(KC_V),      XXXXXXX,      KC_LBRC,      KC_7,         KC_8,            KC_9,         KC_RBRC,
    MO(_SYM),     KC_LALT,      KC_LCTL,      KC_LSFT,      KC_LGUI,      KC_EQL,       KC_4,         KC_5,            KC_6,         KC_SCLN,
    XXXXXXX,      XXXXXXX,      XXXXXXX,      KC_RALT,      XXXXXXX,      KC_BSLS,      KC_1,         KC_2,            KC_3,         KC_GRV,
                                              XXXXXXX,      XXXXXXX,      KC_MINS,      KC_0
),

[_NAV] = LAYOUT(
    XXXXXXX,      KC_PGUP,      KC_UP,        KC_PGDN,      XXXXXXX,      QK_BOOT,      XXXXXXX,      XXXXXXX,         XXXXXXX,      TO(_BASE),
    KC_HOME,      KC_LEFT,      KC_DOWN,      KC_RGHT,      KC_END,       KC_RGUI,      KC_RSFT,      KC_RCTL,         KC_LALT,      MO(_FN),
    XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      KC_RALT,      XXXXXXX,         XXXXXXX,      XXXXXXX,
                                              KC_TAB,       KC_ENT,       XXXXXXX,      XXXXXXX
),

[_SYM] = LAYOUT(
    TO(_BASE),    C(KC_X),      C(KC_C),      C(KC_V),      XXXXXXX,      KC_LCBR,      KC_AMPR,      KC_ASTR,         KC_LPRN,      KC_RCBR,
    XXXXXXX,      KC_LALT,      KC_LCTL,      KC_LSFT,      KC_LGUI,      KC_PLUS,      KC_DLR,       KC_PERC,         KC_CIRC,      KC_COLN,
    XXXXXXX,      XXXXXXX,      XXXXXXX,      KC_RALT,      XXXXXXX,      KC_PIPE,      KC_EXLM,      KC_AT,           KC_HASH,      KC_TILD,
                                              XXXXXXX,      XXXXXXX,      KC_UNDS,      KC_RPRN
),

[_FN] = LAYOUT(
    KC_F12,       KC_F7,        KC_F8,        KC_F9,        KC_PSCR,      QK_BOOT,      XXXXXXX,      XXXXXXX,         XXXXXXX,      TO(_BASE),
    KC_F11,       KC_F4,        KC_F5,        KC_F6,        KC_DEL,       KC_RGUI,      KC_RSFT,      KC_RCTL,         KC_LALT,      XXXXXXX,
    KC_F10,       KC_F1,        KC_F2,        KC_F3,        KC_INS,       XXXXXXX,      KC_RALT,      XXXXXXX,         XXXXXXX,      XXXXXXX,
                                              KC_BSPC,      KC_ESC,       XXXXXXX,      XXXXXXX
),

[_MAGIC] = LAYOUT(
    XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      KC_CAPS,         XXXXXXX,      XXXXXXX,
    KC_LBRC,      KC_RBRC,      KC_LPRN,      KC_RPRN,      XXXXXXX,      XXXXXXX,      KC_LCBR,      KC_RCBR,         S(KC_COMMA),  S(KC_DOT),
    TO(_NUM),     TO(_SYM),     XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX,         TO(_FN),      TO(_NAV),
                                              XXXXXXX,      XXXXXXX,      XXXXXXX,      XXXXXXX
)

};

#include "achordion.h"

bool process_record_user(uint16_t keycode, keyrecord_t* record) {
  if (!process_achordion(keycode, record)) { return false; }
  return true;
}

void matrix_scan_user(void) {
  achordion_task();
}

// Returns true if `pos` on the left hand of the keyboard, false if right.
static bool on_left_hand(keypos_t pos) {
  // works not really on planck for bottom row, but we handle that differently
  return pos.row < MATRIX_ROWS / 2;
}

bool achordion_chord(uint16_t tap_hold_keycode,
                     keyrecord_t* tap_hold_record,
                     uint16_t other_keycode,
                     keyrecord_t* other_record) {
  // allow that bottom row has no delay
  if (tap_hold_record->event.key.row % (MATRIX_ROWS / 2) >= 3) { return true; }
  if (other_record->event.key.row % (MATRIX_ROWS / 2) >= 3) { return true; }

  // Otherwise, follow the opposite hands rule.
  return on_left_hand(tap_hold_record->event.key) !=
         on_left_hand(other_record->event.key);
}