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/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
#include <drivers/behavior.h>
#include <logging/log.h>
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
#include <zmk/event_manager.h>
#include <zmk/events/keycode_state_changed.h>
#include <zmk/events/modifiers_state_changed.h>
#include <zmk/hid.h>
#include <dt-bindings/zmk/hid_usage_pages.h>
#include <zmk/endpoints.h>
static int hid_listener_keycode_pressed(const struct zmk_keycode_state_changed *ev) {
int err, explicit_mods_changed, implicit_mods_changed;
LOG_DBG("usage_page 0x%02X keycode 0x%02X implicit_mods 0x%02X explicit_mods 0x%02X",
ev->usage_page, ev->keycode, ev->implicit_modifiers, ev->explicit_modifiers);
switch (ev->usage_page) {
case HID_USAGE_KEY:
err = zmk_hid_keyboard_press(ev->keycode);
if (err < 0) {
LOG_ERR("Unable to press keycode");
return err;
}
break;
case HID_USAGE_CONSUMER:
err = zmk_hid_consumer_press(ev->keycode);
if (err < 0) {
LOG_ERR("Unable to press keycode");
return err;
}
break;
}
explicit_mods_changed = zmk_hid_register_mods(ev->explicit_modifiers);
implicit_mods_changed = zmk_hid_implicit_modifiers_press(ev->implicit_modifiers);
if (ev->usage_page != HID_USAGE_KEY &&
(explicit_mods_changed > 0 || implicit_mods_changed > 0)) {
err = zmk_endpoints_send_report(HID_USAGE_KEY);
if (err < 0) {
LOG_ERR("Failed to send key report for changed mofifiers for consumer page event (%d)",
err);
}
}
return zmk_endpoints_send_report(ev->usage_page);
}
static int hid_listener_keycode_released(const struct zmk_keycode_state_changed *ev) {
int err, explicit_mods_changed, implicit_mods_changed;
LOG_DBG("usage_page 0x%02X keycode 0x%02X implicit_mods 0x%02X explicit_mods 0x%02X",
ev->usage_page, ev->keycode, ev->implicit_modifiers, ev->explicit_modifiers);
switch (ev->usage_page) {
case HID_USAGE_KEY:
err = zmk_hid_keyboard_release(ev->keycode);
if (err < 0) {
LOG_ERR("Unable to release keycode");
return err;
}
break;
case HID_USAGE_CONSUMER:
err = zmk_hid_consumer_release(ev->keycode);
if (err < 0) {
LOG_ERR("Unable to release keycode");
return err;
}
}
explicit_mods_changed = zmk_hid_unregister_mods(ev->explicit_modifiers);
// There is a minor issue with this code.
// If LC(A) is pressed, then LS(B), then LC(A) is released, the shift for B will be released
// prematurely. This causes if LS(B) to repeat like Bbbbbbbb when pressed for a long time.
// Solving this would require keeping track of which key's implicit modifiers are currently
// active and only releasing modifiers at that time.
implicit_mods_changed = zmk_hid_implicit_modifiers_release();
;
if (ev->usage_page != HID_USAGE_KEY &&
(explicit_mods_changed > 0 || implicit_mods_changed > 0)) {
err = zmk_endpoints_send_report(HID_USAGE_KEY);
if (err < 0) {
LOG_ERR("Failed to send key report for changed mofifiers for consumer page event (%d)",
err);
}
}
return zmk_endpoints_send_report(ev->usage_page);
}
int hid_listener(const zmk_event_t *eh) {
const struct zmk_keycode_state_changed *ev = as_zmk_keycode_state_changed(eh);
if (ev) {
if (ev->state) {
hid_listener_keycode_pressed(ev);
} else {
hid_listener_keycode_released(ev);
}
}
return 0;
}
ZMK_LISTENER(hid_listener, hid_listener);
ZMK_SUBSCRIPTION(hid_listener, zmk_keycode_state_changed);
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