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xkbcommon.rs
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xkbcommon.rs
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use std::ops::RangeInclusive;
use x11rb::connection::Connection;
use x11rb::errors::ReplyError;
use x11rb::protocol::xkb;
use x11rb::protocol::xkb::ConnectionExt as _;
use x11rb::xcb_ffi::XCBConnection;
use crate::event::{KeyState, Keysym, Modifiers};
use crate::xkbcommon_sys as ffi;
#[derive(Debug)]
pub struct State {
state: *mut ffi::xkb_state,
mod_indices: ModIndices,
keymap: Keymap,
}
impl State {
pub fn from_keymap(keymap: Keymap) -> Self {
let state = unsafe { ffi::xkb_state_new(keymap.keymap) };
let mod_indices = ModIndices::from_keymap(&keymap);
Self {
state,
mod_indices,
keymap,
}
}
pub fn lookup_keycode(&self, keysym: Keysym) -> Option<u32> {
for keycode in self.keymap.all_keycodes() {
if self.get_keysym(keycode) == keysym {
return Some(keycode);
}
}
None
}
pub fn get_keysym(&self, keycode: u32) -> Keysym {
Keysym::from(unsafe { ffi::xkb_state_key_get_one_sym(self.state, keycode) })
}
pub fn get_modifiers(&self) -> Modifiers {
[
(self.mod_indices.control, Modifiers::CONTROL),
(self.mod_indices.alt, Modifiers::ALT),
(self.mod_indices.shift, Modifiers::SHIFT),
(self.mod_indices.super_, Modifiers::SUPER),
(self.mod_indices.caps_lock, Modifiers::CAPS_LOCK),
(self.mod_indices.num_lock, Modifiers::NUM_LOCK),
]
.into_iter()
.fold(Modifiers::NONE, |acc, (index, modifier)| {
let is_active = unsafe {
ffi::xkb_state_mod_index_is_active(self.state, index, ffi::XKB_STATE_MODS_EFFECTIVE)
!= 0
};
if is_active {
acc | modifier
} else {
acc
}
})
}
pub fn update_key(&self, keycode: u32, state: KeyState) {
unsafe {
ffi::xkb_state_update_key(
self.state,
keycode,
match state {
KeyState::Down => ffi::XKB_KEY_DOWN,
KeyState::Up => ffi::XKB_KEY_UP,
},
);
}
}
pub fn update_mask(&self, event: &xkb::StateNotifyEvent) {
unsafe {
ffi::xkb_state_update_mask(
self.state,
u16::from(event.base_mods) as u32,
u16::from(event.latched_mods) as u32,
u16::from(event.locked_mods) as u32,
event.base_group as u32,
event.latched_group as u32,
u8::from(event.locked_group) as u32,
);
}
}
}
impl Clone for State {
fn clone(&self) -> Self {
Self {
keymap: self.keymap.clone(),
mod_indices: self.mod_indices.clone(),
state: unsafe { ffi::xkb_state_ref(self.state) },
}
}
}
impl Drop for State {
fn drop(&mut self) {
unsafe { ffi::xkb_state_unref(self.state) }
}
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct ModIndices {
control: ffi::xkb_mod_index_t,
shift: ffi::xkb_mod_index_t,
alt: ffi::xkb_mod_index_t,
super_: ffi::xkb_mod_index_t,
caps_lock: ffi::xkb_mod_index_t,
num_lock: ffi::xkb_mod_index_t,
}
impl ModIndices {
fn from_keymap(keymap: &Keymap) -> Self {
let mod_index = |name: &'static [u8]| unsafe {
ffi::xkb_keymap_mod_get_index(keymap.keymap, name.as_ptr().cast())
};
Self {
control: mod_index(ffi::XKB_MOD_NAME_CTRL),
shift: mod_index(ffi::XKB_MOD_NAME_SHIFT),
alt: mod_index(ffi::XKB_MOD_NAME_ALT),
super_: mod_index(ffi::XKB_MOD_NAME_LOGO),
caps_lock: mod_index(ffi::XKB_MOD_NAME_CAPS),
num_lock: mod_index(ffi::XKB_MOD_NAME_NUM),
}
}
}
#[derive(Debug)]
pub struct Keymap {
keymap: *mut ffi::xkb_keymap,
context: Context,
}
impl Keymap {
pub fn from_device(
context: Context,
connection: &XCBConnection,
device_id: DeviceId,
) -> Option<Self> {
let keymap = unsafe {
ffi::xkb_x11_keymap_new_from_device(
context.0,
connection.get_raw_xcb_connection().cast(),
device_id.0 as i32,
ffi::XKB_KEYMAP_COMPILE_NO_FLAGS,
)
};
if keymap.is_null() {
None
} else {
Some(Self { keymap, context })
}
}
pub fn all_keycodes(&self) -> RangeInclusive<u32> {
self.min_keycode()..=self.max_keycode()
}
pub fn min_keycode(&self) -> u32 {
unsafe { ffi::xkb_keymap_min_keycode(self.keymap) }
}
pub fn max_keycode(&self) -> u32 {
unsafe { ffi::xkb_keymap_max_keycode(self.keymap) }
}
}
impl Clone for Keymap {
fn clone(&self) -> Self {
Self {
context: self.context.clone(),
keymap: unsafe { ffi::xkb_keymap_ref(self.keymap) },
}
}
}
impl Drop for Keymap {
fn drop(&mut self) {
unsafe {
ffi::xkb_keymap_unref(self.keymap);
}
}
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
pub struct DeviceId(u8);
impl DeviceId {
pub fn core_keyboard(connection: &impl Connection) -> Result<Self, ReplyError> {
let reply = connection
.xkb_get_device_info(
xkb::ID::USE_CORE_KBD.into(),
xkb::XIFeature::from(0u16),
false,
0u8,
0u8,
xkb::LedClass::KBD_FEEDBACK_CLASS,
1u16,
)?
.reply()?;
Ok(Self(reply.device_id))
}
}
#[derive(Debug)]
pub struct Context(*mut ffi::xkb_context);
impl Context {
pub fn new() -> Self {
Self(unsafe { ffi::xkb_context_new(ffi::XKB_CONTEXT_NO_FLAGS) })
}
}
impl Clone for Context {
fn clone(&self) -> Self {
unsafe { Self(ffi::xkb_context_ref(self.0)) }
}
}
impl Drop for Context {
fn drop(&mut self) {
unsafe {
ffi::xkb_context_unref(self.0);
}
}
}