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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(u8_t usage_page, u32_t keycode,
zmk_mod_flags implicit_modifiers) {
int err;
LOG_DBG("usage_page 0x%02X keycode 0x%02X mods 0x%02X", usage_page, keycode,
implicit_modifiers);
switch (usage_page) {
case HID_USAGE_KEY:
err = zmk_hid_keypad_press(keycode);
if (err) {
LOG_ERR("Unable to press keycode");
return err;
}
break;
case HID_USAGE_CONSUMER:
err = zmk_hid_consumer_press(keycode);
if (err) {
LOG_ERR("Unable to press keycode");
return err;
}
break;
}
zmk_hid_implicit_modifiers_press(implicit_modifiers);
return zmk_endpoints_send_report(usage_page);
}
static int hid_listener_keycode_released(u8_t usage_page, u32_t keycode,
zmk_mod_flags implicit_modifiers) {
int err;
LOG_DBG("usage_page 0x%02X keycode 0x%02X mods 0x%02X", usage_page, keycode,
implicit_modifiers);
switch (usage_page) {
case HID_USAGE_KEY:
err = zmk_hid_keypad_release(keycode);
if (err) {
LOG_ERR("Unable to release keycode");
return err;
}
break;
case HID_USAGE_CONSUMER:
err = zmk_hid_consumer_release(keycode);
if (err) {
LOG_ERR("Unable to release keycode");
return err;
}
}
// 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.
zmk_hid_implicit_modifiers_release();
return zmk_endpoints_send_report(usage_page);
}
int hid_listener(const struct zmk_event_header *eh) {
if (is_keycode_state_changed(eh)) {
const struct keycode_state_changed *ev = cast_keycode_state_changed(eh);
if (ev->state) {
hid_listener_keycode_pressed(ev->usage_page, ev->keycode, ev->implicit_modifiers);
} else {
hid_listener_keycode_released(ev->usage_page, ev->keycode, ev->implicit_modifiers);
}
}
return 0;
}
ZMK_LISTENER(hid_listener, hid_listener);
ZMK_SUBSCRIPTION(hid_listener, keycode_state_changed);
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