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/* Copyright 2022 elliotpatros
*
* 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 QMK_KEYBOARD_H
// Layer definitions
enum custom_layers {
_COLEMAK,
_FUNCTION,
};
// Custom keycodes, implemented later, in function: process_record_user()
enum custom_keycodes {
CTL_ESC = SAFE_RANGE, // mod tap: left control / esc
SFT_ENT, // mod tap: left shift / enter
LST_PRN, // mod tap: left shift / left parenthesis
RST_PRN, // mod tap: right shift / right parenthesis
};
// Shorthand keycode definitions
#define OSM_CAG OSM(MOD_LCTL | MOD_LALT | MOD_LGUI)
#define LT_BSFN LT(_FUNCTION, KC_BSLS)
// The layout
const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
// Default layer
[_COLEMAK] = LAYOUT (
// ┌────────┬────────┬────────┬────────┬────────┬────────┐ ┌────────┬────────┬────────┬────────┬────────┬────────┐
KC_GRV, KC_1, KC_2, KC_3, KC_4, KC_5, KC_6, KC_7, KC_8, KC_9, KC_0, KC_MINS,
// ├────────┼────────┼────────┼────────┼────────┼────────┤ ├────────┼────────┼────────┼────────┼────────┼────────┤
KC_TAB, KC_Q, KC_W, KC_F, KC_P, KC_G, KC_J, KC_L, KC_U, KC_Y, KC_SCLN, KC_EQL,
// ├────────┼────────┼────────┼────────┼────────┼────────┤ ├────────┼────────┼────────┼────────┼────────┼────────┤
CTL_ESC, KC_A, KC_R, KC_S, KC_T, KC_D, KC_H, KC_N, KC_E, KC_I, KC_O, KC_QUOT,
// ├────────┼────────┼────────┼────────┼────────┼────────┼────────┐┌────────┼────────┼────────┼────────┼────────┼────────┼────────┤
LST_PRN, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_SPC, KC_ENT, KC_K, KC_M, KC_COMM, KC_DOT, KC_SLSH, RST_PRN,
// └────────┴────────┴────────┴────────┼────────┼────────┼────────┘└────────┼────────┴────────┴────────┴────────┴────────┴────────┘
KC_LALT, KC_LGUI, SFT_ENT, KC_SPC, LT_BSFN, KC_BSPC
// └────────┴────────┴────────┘└────────┴────────┴────────┘
),
// Function (and I guess also media & navigation) layer
[_FUNCTION] = LAYOUT (
// ┌────────┬────────┬────────┬────────┬────────┬────────┐ ┌────────┬────────┬────────┬────────┬────────┬────────┐
_______, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, _______,
// ├────────┼────────┼────────┼────────┼────────┼────────┤ ├────────┼────────┼────────┼────────┼────────┼────────┤
_______, KC_GRV, KC_LPRN, KC_RPRN, KC_F11, KC_F12, KC_INS, KC_HOME, KC_UP, KC_PGUP, _______, _______,
// ├────────┼────────┼────────┼────────┼────────┼────────┤ ├────────┼────────┼────────┼────────┼────────┼────────┤
_______, KC_LCBR, KC_LBRC, KC_RBRC, KC_RCBR, OSM_CAG, KC_VOLU, KC_LEFT, KC_DOWN, KC_RGHT, KC_BSPC, _______,
// ├────────┼────────┼────────┼────────┼────────┼────────┼────────┐┌────────┼────────┼────────┼────────┼────────┼────────┼────────┤
_______, _______, _______, _______, _______, KC_MUTE, _______, _______, KC_VOLD, KC_DEL, KC_END, KC_PGDN, _______, _______,
// └────────┴────────┴────────┴────────┼────────┼────────┼────────┘└────────┼────────┴────────┴────────┴────────┴────────┴────────┘
_______, _______, _______, _______, _______, _______
// └────────┴────────┴────────┘└────────┴────────┴────────┘
)
};
static inline bool dualfunckey_was_tapped(const uint16_t time_when_pressed) {
return timer_elapsed(time_when_pressed) < TAPPING_TERM;
}
bool process_record_user(uint16_t keycode, keyrecord_t* record) {
// Static variables
static uint16_t timer_control_escape = 0;
static uint16_t timer_shift_enter = 0;
static uint16_t timer_shift_lparen = 0;
static uint16_t timer_shift_rparen = 0;
static bool dualfunckey_pending = false;
static bool shift_enter_is_pressed = false;
static bool shift_lparen_is_pressed = false;
// Was this function called to handle a keydown? If not, it was called by a
// key up.
const bool pressed = record->event.pressed;
// Any keydown (at all) spends a pending dual function key check. Why? If,
// for example, you use shift to type a capital letter, and shift keys down
// and up faster than the tapping term, did you mean to call shift's tapping
// key? No. You just meant to call shift.
if (pressed) {
dualfunckey_pending = false;
}
// Only keycodes >= SAFE_RANGE are handled in this function
if (keycode < SAFE_RANGE) {
// This keypress was not handled
return true;
}
// Handle custom keypresses here
switch (keycode) {
// -------------------------------------------------------------------------
// Dual function key (hold: left shift; tap: enter)
// -------------------------------------------------------------------------
case SFT_ENT:
// There are multiple keys that are mapped to left shift. Keep track of
// which are pressed
shift_enter_is_pressed = pressed;
// Handle keypress routine
if (pressed) {
// The [left shift/enter] key was pressed
register_code(KC_LSFT);
// Save keydown time for checking hold/tap on keyup
timer_shift_enter = timer_read();
// Pressing a dual function key requires a hold/tap check on key up
dualfunckey_pending = true;
} else {
// The [left shift/enter] key was unpressed
// Note: unregister shift before pressing ENT so that ENT registers
// correctly
// If no other left shift keys are currently pressed, unregister it
if (! shift_lparen_is_pressed) {
unregister_code(KC_LSFT);
}
// If a pending dual function key hasn't been used yet, use it here
if (dualfunckey_pending && dualfunckey_was_tapped(timer_shift_enter)) {
tap_code(KC_ENT);
dualfunckey_pending = false;
}
}
// This keypress was handled
return false;
// -------------------------------------------------------------------------
// Dual function key (hold: left control; tap: escape)
// -------------------------------------------------------------------------
case CTL_ESC:
// Handle keypress routine
if (pressed) {
// Control/escape key was pressed
register_code(KC_LCTL);
// Save keydown time for checking hold/tap on keyup
timer_control_escape = timer_read();
// Pressing a dual function key requires a hold/tap check on key up
dualfunckey_pending = true;
} else {
// Control/escape key was unpressed
unregister_code(KC_LCTL);
// If a pending dual function key hasn't been used yet, use it here
if (dualfunckey_pending && dualfunckey_was_tapped(timer_control_escape)) {
tap_code(KC_ESC);
dualfunckey_pending = false;
}
}
// This keypress was handled
return false;
// -------------------------------------------------------------------------
// Dual function key (hold: left shift; tap: left parenthesis)
// -------------------------------------------------------------------------
case LST_PRN:
// There are multiple keys that are mapped to left shift. Keep track of
// which are pressed
shift_lparen_is_pressed = pressed;
// Handle keypress routine
if (pressed) {
// The [left shift/left parenthesis] key was pressed
register_code(KC_LSFT);
// Save keydown time for checking hold/tap on keyup
timer_shift_lparen = timer_read();
// Pressing a dual function key requires a hold/tap check on key up
dualfunckey_pending = true;
} else {
// The [left shift/left parenthesis] key was unpressed
// Note: unregister shift after tapping 9 so that left parenthesis
// registers correctly
// If a pending dual function key hasn't been used yet, use it here
if (dualfunckey_pending && dualfunckey_was_tapped(timer_shift_lparen)) {
tap_code(KC_9);
dualfunckey_pending = false;
}
// If no other left shift keys are currently pressed, unregister it
if (! shift_enter_is_pressed) {
unregister_code(KC_LSFT);
}
}
// This keypress was handled
return false;
// -------------------------------------------------------------------------
// Dual function key (hold: right shift; tap: right parenthesis)
// -------------------------------------------------------------------------
case RST_PRN:
// Handle keypress routine
if (pressed) {
// The [right shift/right parenthesis] key was pressed
register_code(KC_RSFT);
// Save keydown time for checking hold/tap on keyup
timer_shift_rparen = timer_read();
// Pressing a dual function key requires a hold/tap check on key up
dualfunckey_pending = true;
} else {
// The [right shift/right parenthesis] key was unpressed
// Note: unregister shift after tapping 0 so that right parenthesis
// registers correctly
// If a pending dual function key hasn't been used yet, use it here
if (dualfunckey_pending && dualfunckey_was_tapped(timer_shift_rparen)) {
// Space cadet shift: If the [left shift/left parenthesis] key
// is currently pressed, then tap the sequence ()
if (shift_lparen_is_pressed) {
tap_code(KC_9);
}
tap_code(KC_0);
dualfunckey_pending = false;
}
unregister_code(KC_RSFT);
}
// This keypress was handled
return false;
// -------------------------------------------------------------------------
// Some other key was pressed (this shouldn't happen)
// -------------------------------------------------------------------------
default:
// This keypress was not handled
return true;
}
}
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