59 lines
1.2 KiB
Rust
59 lines
1.2 KiB
Rust
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// This code is a port of the libxkbcommon "interactive-evdev.c" example
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// https://github.com/xkbcommon/libxkbcommon/blob/master/tools/interactive-evdev.c
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use scopeguard::ScopeGuard;
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use anyhow::Result;
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use thiserror::Error;
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use super::{
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ffi::{
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xkb_state, xkb_state_key_get_one_sym, xkb_state_new, xkb_state_unref,
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},
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keymap::Keymap,
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};
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pub struct State {
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state: *mut xkb_state,
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}
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impl State {
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pub fn new(keymap: &Keymap) -> Result<State> {
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let raw_state = unsafe { xkb_state_new(keymap.get_handle()) };
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let state = scopeguard::guard(raw_state, |raw_state| unsafe {
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xkb_state_unref(raw_state);
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});
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if raw_state.is_null() {
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return Err(StateError::FailedCreation().into());
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}
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Ok(Self {
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state: ScopeGuard::into_inner(state),
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})
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}
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pub fn get_sym(&self, code: u32) -> Option<u32> {
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let sym = unsafe { xkb_state_key_get_one_sym(self.state, code) };
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if sym == 0 {
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None
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} else {
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Some(sym)
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}
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}
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}
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impl Drop for State {
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fn drop(&mut self) {
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unsafe {
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xkb_state_unref(self.state);
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}
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}
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}
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#[derive(Error, Debug)]
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pub enum StateError {
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#[error("could not create xkb state")]
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FailedCreation(),
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}
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