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