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/* Copyright 2022 @daliusd
*
* 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 "flow.h"
extern const uint16_t flow_config[FLOW_COUNT][2];
extern const uint16_t flow_layers_config[FLOW_LAYERS_COUNT][2];
// Represents the states a flow key can be in
typedef enum {
flow_up_unqueued,
flow_up_queued,
flow_up_queued_used,
flow_down_unused,
flow_down_used,
} flow_state_t;
#ifdef FLOW_ONESHOT_TERM
const int g_flow_oneshot_term = FLOW_ONESHOT_TERM;
#else
const int g_flow_oneshot_term = 500;
#endif
#ifdef FLOW_ONESHOT_WAIT_TERM
const int g_flow_oneshot_wait_term = FLOW_ONESHOT_WAIT_TERM;
#else
const int g_flow_oneshot_wait_term = 500;
#endif
flow_state_t flow_state[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = flow_up_unqueued };
bool flow_pressed[FLOW_COUNT][2] = { [0 ... FLOW_COUNT - 1] = {false, false} };
uint16_t flow_timers[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
bool flow_timeout_timers_active[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
uint16_t flow_timeout_timers_value[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
uint16_t flow_timeout_wait_timers_value[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = 0 };
flow_state_t flow_layers_state[FLOW_LAYERS_COUNT] = {
[0 ... FLOW_LAYERS_COUNT - 1] = flow_up_unqueued
};
bool flow_layer_timeout_timers_active[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = false };
uint16_t flow_layer_timeout_timers_value[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = 0 };
uint16_t flow_layer_timeout_wait_timers_value[FLOW_LAYERS_COUNT] = { [0 ... FLOW_LAYERS_COUNT - 1] = 0 };
bool is_flow_ignored_key(uint16_t keycode) {
for (int i = 0; i < FLOW_COUNT; i++) {
if (flow_config[i][0] == keycode) {
return true;
}
}
for (int i = 0; i < FLOW_LAYERS_COUNT; i++) {
if (flow_layers_config[i][0] == keycode) {
return true;
}
}
if (keycode == KC_LSFT || keycode == KC_RSFT
|| keycode == KC_LCTL || keycode == KC_RCTL
|| keycode == KC_LALT || keycode == KC_RALT
|| keycode == KC_LGUI || keycode == KC_RGUI) {
return true;
}
return false;
}
bool update_flow_mods(
uint16_t keycode,
bool pressed
) {
bool pass = true;
bool flow_key_list_triggered[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
bool flow_key_list_pressed[FLOW_COUNT] = { [0 ... FLOW_COUNT - 1] = false };
bool flow_triggered = false;
for (uint8_t i = 0; i < FLOW_COUNT; i++) {
// Layer key
if (keycode == flow_config[i][0]) {
if (pressed) {
flow_pressed[i][0] = true;
} else {
flow_pressed[i][0] = false;
}
// KC mod key
} else if (keycode == flow_config[i][1]) {
if (pressed) {
if (flow_pressed[i][0]) {
flow_pressed[i][1] = true;
flow_key_list_triggered[i] = true;
flow_triggered = true;
flow_key_list_pressed[i] = true;
pass = false;
}
} else if (flow_pressed[i][1]) {
flow_pressed[i][1] = false;
if (flow_pressed[i][0]) {
flow_key_list_triggered[i] = true;
flow_triggered = true;
pass = false;
} else if ((flow_state[i] == flow_down_unused)
|| (flow_state[i] == flow_down_used)) {
flow_key_list_triggered[i] = true;
flow_triggered = true;
pass = false;
}
}
}
}
for (uint8_t i = 0; i < FLOW_COUNT; i++) {
if (flow_key_list_triggered[i]) {
if (flow_key_list_pressed[i]) {
if (flow_state[i] == flow_up_unqueued) {
register_code(flow_config[i][1]);
}
flow_timeout_wait_timers_value[i] = timer_read();
flow_state[i] = flow_down_unused;
} else {
// Trigger keyup
switch (flow_state[i]) {
case flow_down_unused:
if (!flow_pressed[i][1]) {
if (timer_elapsed(flow_timeout_wait_timers_value[i]) > g_flow_oneshot_wait_term) {
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
} else {
// If we didn't use the mod while trigger was held, queue it.
flow_state[i] = flow_up_queued;
flow_timeout_timers_active[i] = true;
flow_timeout_timers_value[i] = timer_read();
}
}
break;
case flow_down_used:
// If we did use the mod while trigger was held, unregister it.
if (!flow_pressed[i][1]) {
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
}
break;
default:
break;
}
}
} else if (!flow_triggered) {
if (pressed) {
if (!is_flow_ignored_key(keycode)) {
switch (flow_state[i]) {
case flow_up_queued:
flow_state[i] = flow_up_queued_used;
flow_timeout_timers_active[i] = false;
break;
case flow_up_queued_used:
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
break;
default:
break;
}
}
} else {
if (!is_flow_ignored_key(keycode)) {
// On non-ignored keyup, consider the oneshot used.
switch (flow_state[i]) {
case flow_down_unused:
flow_state[i] = flow_down_used;
break;
case flow_up_queued:
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
break;
case flow_up_queued_used:
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
break;
default:
break;
}
}
}
}
}
return pass;
}
void change_pressed_status(uint16_t keycode, bool pressed) {
for (int i = 0; i < FLOW_COUNT; i++) {
if (flow_config[i][0] == keycode) {
flow_pressed[i][0] = pressed;
}
}
}
bool update_flow_layers(
uint16_t keycode,
bool pressed,
keypos_t key_position
) {
uint8_t key_layer = read_source_layers_cache(key_position);
bool pass = true;
for (int i = 0; i < FLOW_LAYERS_COUNT; i++) {
uint16_t trigger = flow_layers_config[i][0];
uint16_t layer = flow_layers_config[i][1];
if (keycode == trigger) {
if (pressed) {
// Trigger keydown
if (flow_layers_state[i] == flow_up_unqueued) {
layer_on(layer);
change_pressed_status(trigger, true);
}
flow_layer_timeout_wait_timers_value[i] = timer_read();
flow_layers_state[i] = flow_down_unused;
pass = false;
} else {
// Trigger keyup
switch (flow_layers_state[i]) {
case flow_down_unused:
if (timer_elapsed(flow_layer_timeout_wait_timers_value[i]) > g_flow_oneshot_wait_term) {
flow_layers_state[i] = flow_up_unqueued;
layer_off(layer);
change_pressed_status(trigger, false);
pass = false;
} else {
// If we didn't use the layer while trigger was held, queue it.
flow_layers_state[i] = flow_up_queued;
flow_layer_timeout_timers_active[i] = true;
flow_layer_timeout_timers_value[i] = timer_read();
pass = false;
change_pressed_status(trigger, true);
}
break;
case flow_down_used:
// If we did use the layer while trigger was held, turn off it.
flow_layers_state[i] = flow_up_unqueued;
layer_off(layer);
change_pressed_status(trigger, false);
pass = false;
break;
default:
break;
}
}
} else {
if (pressed) {
if (key_layer == layer) {
// On non-ignored keyup, consider the oneshot used.
switch (flow_layers_state[i]) {
case flow_down_unused:
flow_layers_state[i] = flow_down_used;
break;
case flow_up_queued:
flow_layers_state[i] = flow_up_queued_used;
flow_layer_timeout_timers_active[i] = false;
break;
case flow_up_queued_used:
flow_layers_state[i] = flow_up_unqueued;
layer_off(layer);
change_pressed_status(trigger, false);
pass = false;
break;
default:
break;
}
}
} else {
// Ignore key ups from other layers
if (key_layer == layer) {
// On non-ignored keyup, consider the oneshot used.
switch (flow_layers_state[i]) {
case flow_up_queued:
flow_layers_state[i] = flow_up_unqueued;
layer_off(layer);
change_pressed_status(trigger, false);
break;
case flow_up_queued_used:
flow_layers_state[i] = flow_up_unqueued;
layer_off(layer);
change_pressed_status(trigger, false);
break;
default:
break;
}
}
}
}
}
return pass;
}
bool update_flow(
uint16_t keycode,
bool pressed,
keypos_t key_position
) {
bool pass = update_flow_mods(keycode, pressed);
pass = update_flow_layers(keycode, pressed, key_position) & pass;
return pass;
}
void flow_matrix_scan(void) {
for (int i = 0; i < FLOW_COUNT; i++) {
if (flow_timeout_timers_active[i]
&& timer_elapsed(flow_timeout_timers_value[i]) > g_flow_oneshot_term) {
flow_timeout_timers_active[i] = false;
flow_state[i] = flow_up_unqueued;
unregister_code(flow_config[i][1]);
}
}
for (int i = 0; i < FLOW_LAYERS_COUNT; i++) {
if (flow_layer_timeout_timers_active[i]
&& timer_elapsed(flow_layer_timeout_timers_value[i]) > g_flow_oneshot_term) {
flow_layer_timeout_timers_active[i] = false;
flow_layers_state[i] = flow_up_unqueued;
layer_off(flow_layers_config[i][1]);
change_pressed_status(flow_layers_config[i][0], false);
}
}
}
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