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-rw-r--r--quantum/process_keycode/process_combo.c150
1 files changed, 150 insertions, 0 deletions
diff --git a/quantum/process_keycode/process_combo.c b/quantum/process_keycode/process_combo.c
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+++ b/quantum/process_keycode/process_combo.c
@@ -0,0 +1,150 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * 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 "process_combo.h"
+#include "print.h"
+
+
+#define COMBO_TIMER_ELAPSED -1
+
+
+__attribute__ ((weak))
+combo_t key_combos[] = {
+
+};
+
+__attribute__ ((weak))
+void process_combo_event(uint8_t combo_index, bool pressed) {
+
+}
+
+static uint8_t current_combo_index = 0;
+
+static inline void send_combo(uint16_t action, bool pressed)
+{
+ if (action) {
+ if (pressed) {
+ register_code16(action);
+ } else {
+ unregister_code16(action);
+ }
+ } else {
+ process_combo_event(current_combo_index, pressed);
+ }
+}
+
+#define ALL_COMBO_KEYS_ARE_DOWN (((1<<count)-1) == combo->state)
+#define NO_COMBO_KEYS_ARE_DOWN (0 == combo->state)
+#define KEY_STATE_DOWN(key) do{ combo->state |= (1<<key); } while(0)
+#define KEY_STATE_UP(key) do{ combo->state &= ~(1<<key); } while(0)
+static bool process_single_combo(combo_t *combo, uint16_t keycode, keyrecord_t *record)
+{
+ uint8_t count = 0;
+ uint8_t index = -1;
+ /* Find index of keycode and number of combo keys */
+ for (const uint16_t *keys = combo->keys; ;++count) {
+ uint16_t key = pgm_read_word(&keys[count]);
+ if (keycode == key) index = count;
+ if (COMBO_END == key) break;
+ }
+
+ /* Return if not a combo key */
+ if (-1 == (int8_t)index) return false;
+
+ /* The combos timer is used to signal whether the combo is active */
+ bool is_combo_active = COMBO_TIMER_ELAPSED == combo->timer ? false : true;
+
+ if (record->event.pressed) {
+ KEY_STATE_DOWN(index);
+
+ if (is_combo_active) {
+ if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was pressed */
+ send_combo(combo->keycode, true);
+ combo->timer = COMBO_TIMER_ELAPSED;
+ } else { /* Combo key was pressed */
+ combo->timer = timer_read();
+#ifdef COMBO_ALLOW_ACTION_KEYS
+ combo->prev_record = *record;
+#else
+ combo->prev_key = keycode;
+#endif
+ }
+ }
+ } else {
+ if (ALL_COMBO_KEYS_ARE_DOWN) { /* Combo was released */
+ send_combo(combo->keycode, false);
+ }
+
+ if (is_combo_active) { /* Combo key was tapped */
+#ifdef COMBO_ALLOW_ACTION_KEYS
+ record->event.pressed = true;
+ process_action(record, store_or_get_action(record->event.pressed, record->event.key));
+ record->event.pressed = false;
+ process_action(record, store_or_get_action(record->event.pressed, record->event.key));
+#else
+ register_code16(keycode);
+ send_keyboard_report();
+ unregister_code16(keycode);
+#endif
+ combo->timer = 0;
+ }
+
+ KEY_STATE_UP(index);
+ }
+
+ if (NO_COMBO_KEYS_ARE_DOWN) {
+ combo->timer = 0;
+ }
+
+ return is_combo_active;
+}
+
+bool process_combo(uint16_t keycode, keyrecord_t *record)
+{
+ bool is_combo_key = false;
+
+ for (current_combo_index = 0; current_combo_index < COMBO_COUNT; ++current_combo_index) {
+ combo_t *combo = &key_combos[current_combo_index];
+ is_combo_key |= process_single_combo(combo, keycode, record);
+ }
+
+ return !is_combo_key;
+}
+
+void matrix_scan_combo(void)
+{
+ for (int i = 0; i < COMBO_COUNT; ++i) {
+ combo_t *combo = &key_combos[i];
+ if (combo->timer &&
+ combo->timer != COMBO_TIMER_ELAPSED &&
+ timer_elapsed(combo->timer) > COMBO_TERM) {
+
+ /* This disables the combo, meaning key events for this
+ * combo will be handled by the next processors in the chain
+ */
+ combo->timer = COMBO_TIMER_ELAPSED;
+
+#ifdef COMBO_ALLOW_ACTION_KEYS
+ process_action(&combo->prev_record,
+ store_or_get_action(combo->prev_record.event.pressed,
+ combo->prev_record.event.key));
+#else
+ unregister_code16(combo->prev_key);
+ register_code16(combo->prev_key);
+#endif
+ }
+ }
+}