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|
use atoms::InternedAtoms;
use clients::ClientList;
use thiserror::Error;
use xcb::{
x::{self, ChangeWindowAttributes, Screen, Window},
Connection, Extension,
};
mod atoms;
mod clients;
type Result<T, E = Error> = std::result::Result<T, E>;
#[derive(Debug, Error)]
pub enum Error {
#[error("xcb returned screen that doesn't exist")]
NoSuchScreen,
#[error("other wm is running")]
OtherWMRunning,
#[error("connection error: {0}")]
ConnectionError(#[from] xcb::ConnError),
#[error("generic xcb error: {0}")]
XCBError(#[from] xcb::Error),
}
fn main() -> Result<()> {
// todo: cli stuff
let display_name = ":1";
cleanup_process_children();
let (conn, screen_num) =
Connection::connect_with_extensions(Some(display_name), &[], &[Extension::Xinerama])?;
let mut wm = WM::new(&conn, screen_num)?;
wm.event_loop()?;
Ok(())
}
struct WM<'a> {
conn: &'a Connection,
screen_num: i32,
root: Window,
clients: ClientList,
atoms: InternedAtoms,
}
impl WM<'_> {
fn new<'a>(conn: &'a Connection, screen_num: i32) -> Result<WM<'a>> {
// Fetch root window
let setup = conn.get_setup();
let screen = setup
.roots()
.nth(screen_num as usize)
.ok_or(Error::NoSuchScreen)?;
// Check no other WM is running
let cookie = conn.send_request_checked(&ChangeWindowAttributes {
window: screen.root(),
value_list: &[
x::Cw::BackPixel(screen.white_pixel()),
x::Cw::EventMask(x::EventMask::SUBSTRUCTURE_REDIRECT),
],
});
conn.check_request(cookie)
.map_err(|_| Error::OtherWMRunning)?;
Ok(WM {
atoms: InternedAtoms::new_with(conn)?,
clients: Default::default(),
conn,
screen_num,
root: screen.root(),
})
}
fn event_loop(&mut self) -> Result<()> {
self.update_geometry()?;
Ok(())
}
}
fn cleanup_process_children() {
// todo: dont transform children into zombies when they terminate
// todo: cleanup zombies
}
impl<'a> std::fmt::Debug for WM<'a> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("WM")
.field("screen_num", &self.screen_num)
.field("root", &self.root)
.field("clients", &self.clients)
.field("atoms", &self.atoms)
.finish()
}
}
|
