You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
120 lines
5.6 KiB
120 lines
5.6 KiB
/* 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 SHIFT(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) & SHIFT(GET_CODE_INDEX(code))) == SHIFT(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) | SHIFT(GET_CODE_INDEX(code))))
|
|
#define UNSET_KEY_STATE(code) SET_KEY_ARRAY_STATE(code, (GET_KEY_ARRAY(code)) & ~(SHIFT(GET_CODE_INDEX(code))))
|
|
#define IS_STANDARD_KEYCODE(code) ((code) <= 0xFF)
|
|
#define print_hex64(num) do { print_hex32((num & 0xFFFFFFFF00000000) >> 32); print_hex32(num & 0x00000000FFFFFFFF); } while (0)
|
|
|
|
// 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;
|
|
|
|
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.
|
|
if (record->event.pressed) {
|
|
// Non-standard keycode, reset and return
|
|
if (!(IS_STANDARD_KEYCODE(keycode) || keycode == KC_LOCK)) {
|
|
watching = false;
|
|
return true;
|
|
}
|
|
|
|
// If we're already watching, turn off the watch.
|
|
if (keycode == KC_LOCK) {
|
|
watching = !watching;
|
|
return false;
|
|
}
|
|
|
|
if (IS_STANDARD_KEYCODE(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(keycode);
|
|
// Let the standard keymap send the keycode down event. The up event will be masked.
|
|
return true;
|
|
}
|
|
|
|
if (KEY_STATE(keycode)) {
|
|
UNSET_KEY_STATE(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(keycode) && KEY_STATE(keycode));
|
|
}
|
|
}
|