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// Copyright 2021-2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @file custom_shift_keys.c
* @brief Custom Shift Keys implementation
*
* For full documentation, see
* <https://getreuer.info/posts/keyboards/custom-shift-keys>
*/
#include "custom_shift_keys.h"
bool process_custom_shift_keys(uint16_t keycode, keyrecord_t *record) {
static uint16_t registered_keycode = KC_NO;
// If a custom shift key is registered, then this event is either releasing
// it or manipulating another key at the same time. Either way, we release
// the currently registered key.
if (registered_keycode != KC_NO)
{
unregister_code16(registered_keycode);
registered_keycode = KC_NO;
}
if (record->event.pressed)
{ // Press event.
const uint8_t mods = get_mods();
#ifndef NO_ACTION_ONESHOT
if ((mods | get_weak_mods() | get_oneshot_mods()) & MOD_MASK_SHIFT)
{
#else
if ((mods | get_weak_mods()) & MOD_MASK_SHIFT)
{ // Shift is held.
#endif // NO_ACTION_ONESHOT
// Search for a custom key with keycode equal to `keycode`.
for (int i = 0; i < NUM_CUSTOM_SHIFT_KEYS; ++i)
{
if (keycode == custom_shift_keys[i].keycode)
{
// Continue default handling if this is a tap-hold key being held.
if (((QK_MOD_TAP <= keycode && keycode <= QK_MOD_TAP_MAX) || (QK_LAYER_TAP <= keycode && keycode <= QK_LAYER_TAP_MAX)) && record->tap.count == 0)
{
return true;
}
#ifndef NO_ACTION_ONESHOT
del_oneshot_mods(MOD_MASK_SHIFT);
#endif // NO_ACTION_ONESHOT
del_mods(MOD_MASK_SHIFT);
del_weak_mods(MOD_MASK_SHIFT);
send_keyboard_report();
registered_keycode = custom_shift_keys[i].shifted_keycode;
register_code16(registered_keycode);
set_mods(mods); // Restore the mods.
return false;
}
}
}
}
return true; // Continue with default handling.
}
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