mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-12-13 05:11:01 +00:00
140 lines
6.4 KiB
C
140 lines
6.4 KiB
C
/* Copyright 2017 Fredric Silberberg
|
|
*
|
|
* 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 <inttypes.h>
|
|
#include <stdint.h>
|
|
#include "process_key_lock.h"
|
|
|
|
#define BV_64(shift) (((uint64_t)1) << (shift))
|
|
#define GET_KEY_ARRAY(code) (((code) < 0x40) ? key_state[0] : ((code) < 0x80) ? key_state[1] : ((code) < 0xC0) ? key_state[2] : key_state[3])
|
|
#define GET_CODE_INDEX(code) (((code) < 0x40) ? (code) : ((code) < 0x80) ? (code)-0x40 : ((code) < 0xC0) ? (code)-0x80 : (code)-0xC0)
|
|
#define KEY_STATE(code) (GET_KEY_ARRAY(code) & BV_64(GET_CODE_INDEX(code))) == BV_64(GET_CODE_INDEX(code))
|
|
#define SET_KEY_ARRAY_STATE(code, val) \
|
|
do { \
|
|
switch (code) { \
|
|
case 0x00 ... 0x3F: \
|
|
key_state[0] = (val); \
|
|
break; \
|
|
case 0x40 ... 0x7F: \
|
|
key_state[1] = (val); \
|
|
break; \
|
|
case 0x80 ... 0xBF: \
|
|
key_state[2] = (val); \
|
|
break; \
|
|
case 0xC0 ... 0xFF: \
|
|
key_state[3] = (val); \
|
|
break; \
|
|
} \
|
|
} while (0)
|
|
#define SET_KEY_STATE(code) SET_KEY_ARRAY_STATE(code, (GET_KEY_ARRAY(code) | BV_64(GET_CODE_INDEX(code))))
|
|
#define UNSET_KEY_STATE(code) SET_KEY_ARRAY_STATE(code, (GET_KEY_ARRAY(code)) & ~(BV_64(GET_CODE_INDEX(code))))
|
|
#define IS_STANDARD_KEYCODE(code) ((code) <= 0xFF)
|
|
|
|
// Locked key state. This is an array of 256 bits, one for each of the standard keys supported qmk.
|
|
uint64_t key_state[4] = {0x0, 0x0, 0x0, 0x0};
|
|
bool watching = false;
|
|
|
|
// Translate any OSM keycodes back to their unmasked versions.
|
|
static inline uint16_t translate_keycode(uint16_t keycode) {
|
|
if (keycode > QK_ONE_SHOT_MOD && keycode <= QK_ONE_SHOT_MOD_MAX) {
|
|
return keycode ^ QK_ONE_SHOT_MOD;
|
|
} else {
|
|
return keycode;
|
|
}
|
|
}
|
|
|
|
void cancel_key_lock(void) {
|
|
watching = false;
|
|
UNSET_KEY_STATE(0x0);
|
|
}
|
|
|
|
bool process_key_lock(uint16_t *keycode, keyrecord_t *record) {
|
|
// We start by categorizing the keypress event. In the event of a down
|
|
// event, there are several possibilities:
|
|
// 1. The key is not being locked, and we are not watching for new keys.
|
|
// In this case, we bail immediately. This is the common case for down events.
|
|
// 2. The key was locked, and we need to unlock it. In this case, we will
|
|
// reset the state in our map and return false. When the user releases the
|
|
// key, the up event will no longer be masked and the OS will observe the
|
|
// released key.
|
|
// 3. KC_LOCK was just pressed. In this case, we set up the state machine
|
|
// to watch for the next key down event, and finish processing
|
|
// 4. The keycode is below 0xFF, and we are watching for new keys. In this case,
|
|
// we will send the key down event to the os, and set the key_state for that
|
|
// key to mask the up event.
|
|
// 5. The keycode is above 0xFF, and we're wathing for new keys. In this case,
|
|
// the user pressed a key that we cannot "lock", as it's a series of keys,
|
|
// or a macro invocation, or a layer transition, or a custom-defined key, or
|
|
// or some other arbitrary code. In this case, we bail immediately, reset
|
|
// our watch state, and return true.
|
|
//
|
|
// In the event of an up event, there are these possibilities:
|
|
// 1. The key is not being locked. In this case, we return true and bail
|
|
// immediately. This is the common case.
|
|
// 2. The key is being locked. In this case, we will mask the up event
|
|
// by returning false, so the OS never sees that the key was released
|
|
// until the user pressed the key again.
|
|
|
|
// We translate any OSM keycodes back to their original keycodes, so that if the key being
|
|
// one-shot modded is a standard keycode, we can handle it. This is the only set of special
|
|
// keys that we handle
|
|
uint16_t translated_keycode = translate_keycode(*keycode);
|
|
|
|
if (record->event.pressed) {
|
|
// Non-standard keycode, reset and return
|
|
if (!(IS_STANDARD_KEYCODE(translated_keycode) || translated_keycode == KC_LOCK)) {
|
|
watching = false;
|
|
return true;
|
|
}
|
|
|
|
// If we're already watching, turn off the watch.
|
|
if (translated_keycode == KC_LOCK) {
|
|
watching = !watching;
|
|
return false;
|
|
}
|
|
|
|
if (IS_STANDARD_KEYCODE(translated_keycode)) {
|
|
// We check watching first. This is so that in the following scenario, we continue to
|
|
// hold the key: KC_LOCK, KC_F, KC_LOCK, KC_F
|
|
// If we checked in reverse order, we'd end up holding the key pressed after the second
|
|
// KC_F press is registered, when the user likely meant to hold F
|
|
if (watching) {
|
|
watching = false;
|
|
SET_KEY_STATE(translated_keycode);
|
|
// We need to set the keycode passed in to be the translated keycode, in case we
|
|
// translated a OSM back to the original keycode.
|
|
*keycode = translated_keycode;
|
|
// Let the standard keymap send the keycode down event. The up event will be masked.
|
|
return true;
|
|
}
|
|
|
|
if (KEY_STATE(translated_keycode)) {
|
|
UNSET_KEY_STATE(translated_keycode);
|
|
// The key is already held, stop this process. The up event will be sent when the user
|
|
// releases the key.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Either the key isn't a standard key, or we need to send the down event. Continue standard
|
|
// processing
|
|
return true;
|
|
} else {
|
|
// Stop processing if it's a standard key and we're masking up.
|
|
return !(IS_STANDARD_KEYCODE(translated_keycode) && KEY_STATE(translated_keycode));
|
|
}
|
|
}
|