155 lines
4.7 KiB
C
155 lines
4.7 KiB
C
/* Copyright 2016 Jack Humbert
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "process_combo.h"
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#include "print.h"
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__attribute__ ((weak))
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combo_t key_combos[COMBO_COUNT] = {
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};
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__attribute__ ((weak))
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void process_combo_event(uint8_t combo_index, bool pressed) {
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}
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static uint8_t current_combo_index = 0;
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static inline void send_combo(uint16_t action, bool pressed)
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{
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if (action) {
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if (pressed) {
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register_code16(action);
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} else {
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unregister_code16(action);
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}
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} else {
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process_combo_event(current_combo_index, pressed);
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}
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}
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#define ALL_COMBO_KEYS_ARE_DOWN (((1<<count)-1) == combo->state)
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#define NO_COMBO_KEYS_ARE_DOWN (0 == combo->state)
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#define KEY_STATE_DOWN(key) do{ combo->state |= (1<<key); } while(0)
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#define KEY_STATE_UP(key) do{ combo->state &= ~(1<<key); } while(0)
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static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record)
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{
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uint8_t count = 0;
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uint8_t index = -1;
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/* Find index of keycode and number of combo keys */
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for (const uint16_t *keys = combo->keys; ;++count) {
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uint16_t key = pgm_read_word(&keys[count]);
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if (keycode == key) index = count;
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if (COMBO_END == key) break;
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}
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/* Return if not a combo key */
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if (-1 == (int8_t)index) return false;
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/* The combos timer is used to signal whether the combo is active */
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bool is_combo_active = combo->is_active;
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if (record->event.pressed) {
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KEY_STATE_DOWN(index);
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if (is_combo_active) {
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if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was pressed */
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send_combo(combo->keycode, true);
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combo->is_active = false;
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} else { /* Combo key was pressed */
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combo->timer = timer_read();
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combo->is_active = true;
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#ifdef COMBO_ALLOW_ACTION_KEYS
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combo->prev_record = *record;
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#else
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combo->prev_key = keycode;
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#endif
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}
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}
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} else {
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if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was released */
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send_combo(combo->keycode, false);
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}
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if (is_combo_active) { /* Combo key was tapped */
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#ifdef COMBO_ALLOW_ACTION_KEYS
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record->event.pressed = true;
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process_action(record, store_or_get_action(record->event.pressed, record->event.key));
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record->event.pressed = false;
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process_action(record, store_or_get_action(record->event.pressed, record->event.key));
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#else
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register_code16(keycode);
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send_keyboard_report();
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unregister_code16(keycode);
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#endif
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combo->is_active = false;
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combo->timer = 0;
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}
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KEY_STATE_UP(index);
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}
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if (NO_COMBO_KEYS_ARE_DOWN) {
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combo->is_active = true;
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combo->timer = 0;
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}
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return is_combo_active;
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}
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bool process_combo(uint16_t keycode, keyrecord_t *record)
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{
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bool is_combo_key = false;
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for (current_combo_index = 0; current_combo_index < COMBO_COUNT; ++current_combo_index) {
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combo_t *combo = &key_combos[current_combo_index];
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is_combo_key |= process_single_combo(combo, keycode, record);
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}
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return !is_combo_key;
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}
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void matrix_scan_combo(void)
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{
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for (int i = 0; i < COMBO_COUNT; ++i) {
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// Do not treat the (weak) key_combos too strict.
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Warray-bounds"
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combo_t *combo = &key_combos[i];
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#pragma GCC diagnostic pop
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if (combo->is_active &&
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combo->timer &&
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timer_elapsed(combo->timer) > COMBO_TERM) {
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/* This disables the combo, meaning key events for this
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* combo will be handled by the next processors in the chain
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*/
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combo->is_active = false;
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#ifdef COMBO_ALLOW_ACTION_KEYS
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process_action(&combo->prev_record,
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store_or_get_action(combo->prev_record.event.pressed,
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combo->prev_record.event.key));
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#else
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unregister_code16(combo->prev_key);
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register_code16(combo->prev_key);
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#endif
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}
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}
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}
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