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//! Keybind-related code
use crate::{config::KEYBINDS, conn_info::Connection, debug, error::Result, WM};
use xcb::x::{
GrabKey, GrabMode, KeyPressEvent, Mapping, MappingNotifyEvent, ModMask, UngrabKey, GRAB_ANY,
};
use xkeysym::Keysym;
impl WM<'_> {
/// Dispatch the given keypress event according to [`self::KEYBINDS`]
pub fn handle_key_press(&mut self, e: &KeyPressEvent) {
let Some(sym) = self
.conn
.keyboard_state
.keycode_to_keysym(e.detail().into(), 0)
else {
return; // probably not bound
};
KEYBINDS.dispatch(
self,
sym,
ModMask::from_bits_truncate(e.state().bits())
.difference(self.conn.keyboard_state.numlock_mask() | ModMask::LOCK),
);
}
/// Update our keyboard info when the mapping changes.
pub fn handle_mapping_notify(&mut self, e: &MappingNotifyEvent) -> Result<()> {
if e.request() == Mapping::Keyboard {
grab(&mut self.conn)?;
}
Ok(())
}
}
/// Refresh our keyboard info, and ensure that we get events for bound keys.
pub fn grab(conn: &mut Connection<'_>) -> Result<()> {
// Refresh keyboard state
conn.refresh_keyboard_info()?;
// Ungrab all keys
conn.send_request(&UngrabKey {
key: GRAB_ANY,
grab_window: conn.root(),
modifiers: ModMask::ANY,
});
// Bind all of the keycodes which have keysyms we see in our binds.
for (keycode, keysym) in conn.keyboard_state.iter_keycodes_keysyms() {
for bind in KEYBINDS.binds() {
if bind.key == keysym {
// grab key with any combination of modifiers
for modmask in [
ModMask::empty(),
ModMask::LOCK,
conn.keyboard_state.numlock_mask(),
conn.keyboard_state.numlock_mask() | ModMask::LOCK,
] {
conn.send_request(&GrabKey {
grab_window: conn.root(),
#[allow(clippy::cast_possible_truncation)]
key: keycode.raw() as u8,
modifiers: bind.modifiers | modmask,
owner_events: true,
pointer_mode: GrabMode::Async,
keyboard_mode: GrabMode::Async,
});
}
}
}
}
// Ensure all requests succeeded
Ok(())
}
/// A key bound to some action
pub struct Keybind {
pub modifiers: ModMask,
pub key: Keysym,
pub action: &'static dyn Fn(&mut WM<'_>),
}
/// A set of keybinds. Currently, there is only one instance of this defined statically: [`crate::config::KEYBINDS`].
pub struct Keybinds(pub &'static [Keybind]);
impl Keybinds {
/// Get an iterator over all bound keys
pub fn binds(&self) -> impl Iterator<Item = &Keybind> {
self.0.iter()
}
/// Attempt to run the action for the matching keybind, if it exists.
pub fn dispatch(&self, wm: &mut WM<'_>, key: Keysym, modifiers: ModMask) {
debug!("received {key:?}");
if let Some(bind) = self
.binds()
.find(|b| b.key == key && modifiers.contains(b.modifiers))
{
debug!("found action");
(bind.action)(wm);
}
}
}
impl std::fmt::Debug for Keybind {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Keybind")
.field("modifiers", &self.modifiers)
.field("key", &self.key)
.finish_non_exhaustive()
}
}
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