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Compose key handling

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This commit is contained in:
Jakub Hlusička 2026-01-07 05:11:58 +01:00
parent 1f21d29bd2
commit 97f330c7b9
1 changed files with 105 additions and 54 deletions
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159
firmware2/src/main.rs
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@ -20,6 +20,7 @@ use core::cell::RefCell;
use core::slice;
use alloc::boxed::Box;
use alloc::string::String;
use alloc::vec;
use cfg_if::cfg_if;
use embassy_executor::Spawner;
@ -61,7 +62,7 @@ use slint::ComponentHandle;
use slint::platform::software_renderer::Rgb565Pixel;
use static_cell::StaticCell;
use ui::AppWindow;
use xkbcommon::xkb::{self, KeyDirection, ModIndex};
use xkbcommon::xkb::{self, FeedResult, KeyDirection, Keysym, Status};
use {esp_alloc as _, esp_backtrace as _};
use crate::matrix::IoeMatrix;
@ -461,74 +462,124 @@ async fn main(_spawner: Spawner) {
let report = KEYBOARD_REPORT_PROXY.receive().await;
if let Report::KeyboardReport(report) = &report {
warn!("MODIFIERS = {:02x}", report.modifier);
const RMK_ALT: u8 = 0xE2;
// TODO: Process modifiers
const KEYCODES_LEN_MODIFIERS: usize = 8;
const KEYCODES_LEN_REGULAR: usize = 6;
const KEYCODES_LEN: usize = KEYCODES_LEN_MODIFIERS + KEYCODES_LEN_REGULAR;
for (keycode_old, &keycode_new) in
core::iter::zip(&mut previous_state.keycodes, &report.keycodes)
{
fn into_xkb_keycode(rmk_keycode: u8) -> xkb::Keycode {
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/hid/hid-input.c?id=refs/tags/v6.18#n27
const UNK: u8 = 240;
#[rustfmt::skip]
const HID_KEYBOARD: [u8; 256] = [
0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
65, 66, 67, 68, 87, 88, 99, 70, 119, 110, 102, 104, 111, 107, 109, 106,
105, 108, 103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
72, 73, 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190,
191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, 136, 113,
115, 114, UNK, UNK, UNK, 121, UNK, 89, 93, 124, 92, 94, 95, UNK, UNK, UNK,
122, 123, 90, 91, 85, UNK, UNK, UNK, UNK, UNK, UNK, UNK, 111, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, 179, 180, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, 111, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, 114, 113,
150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140, UNK, UNK, UNK, UNK,
];
// https://cgit.freedesktop.org/xorg/driver/xf86-input-evdev/tree/src/evdev.c#n73
const MIN_KEYCODE: u8 = 8;
let mut pressed_keys = rmk::heapless::Vec::<u8, KEYCODES_LEN>::new();
let mut released_keys = rmk::heapless::Vec::<u8, KEYCODES_LEN>::new();
// TODO: The combination of these two operations should be precomputed
// in a const expr into a single look-up table.
xkb::Keycode::new(
(HID_KEYBOARD[rmk_keycode as usize] + MIN_KEYCODE) as u32,
)
let pressed_mods_bits = !previous_state.modifier & report.modifier;
let released_mods_bits = previous_state.modifier & !report.modifier;
for index in 0..KEYCODES_LEN_MODIFIERS {
const USB_HID_LEFT_CTRL: u8 = 0xE0;
let mod_bit = 1_u8 << index;
let mod_keycode = USB_HID_LEFT_CTRL + index as u8;
if pressed_mods_bits & mod_bit != 0 {
pressed_keys.push(mod_keycode).unwrap();
}
if *keycode_old == 0 && keycode_new == 0 {
if released_mods_bits & mod_bit != 0 {
released_keys.push(mod_keycode).unwrap();
}
}
// TODO: This currently depends on pressed keys not changing position in the array.
// Should be made independent of that.
for (&keycode_old, &keycode_new) in
core::iter::zip(&previous_state.keycodes, &report.keycodes)
{
if keycode_old == keycode_new {
continue;
}
if keycode_new == 0 || ((*keycode_old != 0) && *keycode_old != keycode_new)
{
warn!("Release: 0x{:02x} ({})", *keycode_old, *keycode_old);
state.update_key(into_xkb_keycode(*keycode_old), KeyDirection::Up);
if keycode_old != 0 {
released_keys.push(keycode_old).unwrap();
}
if *keycode_old == 0 || ((keycode_new != 0) && *keycode_old != keycode_new)
{
let keycode_new_xkb = into_xkb_keycode(keycode_new);
let syms = state.key_get_syms(keycode_new_xkb);
if keycode_new != 0 {
pressed_keys.push(keycode_new).unwrap();
}
}
for sym in syms {
compose_state.feed(*sym);
previous_state = report.clone();
fn into_xkb_keycode(rmk_keycode: u8) -> xkb::Keycode {
// https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/hid/hid-input.c?id=refs/tags/v6.18#n27
const UNK: u8 = 240;
#[rustfmt::skip]
const HID_KEYBOARD: [u8; 256] = [
0, 0, 0, 0, 30, 48, 46, 32, 18, 33, 34, 35, 23, 36, 37, 38,
50, 49, 24, 25, 16, 19, 31, 20, 22, 47, 17, 45, 21, 44, 2, 3,
4, 5, 6, 7, 8, 9, 10, 11, 28, 1, 14, 15, 57, 12, 13, 26,
27, 43, 43, 39, 40, 41, 51, 52, 53, 58, 59, 60, 61, 62, 63, 64,
65, 66, 67, 68, 87, 88, 99, 70, 119, 110, 102, 104, 111, 107, 109, 106,
105, 108, 103, 69, 98, 55, 74, 78, 96, 79, 80, 81, 75, 76, 77, 71,
72, 73, 82, 83, 86, 127, 116, 117, 183, 184, 185, 186, 187, 188, 189, 190,
191, 192, 193, 194, 134, 138, 130, 132, 128, 129, 131, 137, 133, 135, 136, 113,
115, 114, UNK, UNK, UNK, 121, UNK, 89, 93, 124, 92, 94, 95, UNK, UNK, UNK,
122, 123, 90, 91, 85, UNK, UNK, UNK, UNK, UNK, UNK, UNK, 111, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, 179, 180, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, 111, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
29, 42, 56, 125, 97, 54, 100, 126, 164, 166, 165, 163, 161, 115, 114, 113,
150, 158, 159, 128, 136, 177, 178, 176, 142, 152, 173, 140, UNK, UNK, UNK, UNK,
];
// https://cgit.freedesktop.org/xorg/driver/xf86-input-evdev/tree/src/evdev.c#n73
const MIN_KEYCODE: u8 = 8;
// TODO: The combination of these two operations should be precomputed
// in a const expr into a single look-up table.
xkb::Keycode::new((HID_KEYBOARD[rmk_keycode as usize] + MIN_KEYCODE) as u32)
}
for keycode in released_keys {
warn!("Release: 0x{:02x} ({})", keycode, keycode);
state.update_key(into_xkb_keycode(keycode), KeyDirection::Up);
}
for keycode in pressed_keys {
warn!("Pressed: 0x{:02x} ({})", keycode, keycode);
let keycode_xkb = into_xkb_keycode(keycode);
let sym = state.key_get_one_sym(keycode_xkb);
let result: Option<(Keysym, Option<String>)> = match compose_state.feed(sym)
{
FeedResult::Ignored => {
let string = state.key_get_utf8(keycode_xkb);
Some((sym, Some(string)))
}
FeedResult::Accepted => {
let status = compose_state.status();
warn!("Compose status: {status:?}");
match status {
Status::Nothing => {
let string = state.key_get_utf8(keycode_xkb);
Some((sym, Some(string)))
}
Status::Composing => None,
Status::Composed => {
let sym = compose_state.keysym().unwrap_or_default();
let string = compose_state.utf8().unwrap_or_default();
Some((sym, Some(string)))
}
Status::Cancelled => None,
}
}
};
let string = compose_state.utf8();
if let Some((sym, string)) = result {
// Change `Some("")` into `None`.
let string = string.filter(|string| !string.is_empty());
warn!("Pressed: 0x{:02x} ({})", keycode_new, keycode_new);
warn!("Syms: {syms:?}");
warn!("String: {string:?}");
warn!("Sym: {sym:?}");
warn!("String: {:?}", string.as_ref());
state.update_key(keycode_new_xkb, KeyDirection::Down);
state.update_key(keycode_xkb, KeyDirection::Down);
}
*keycode_old = keycode_new;
}
}