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|
use log::{error, info, warn};
use notification_badge::{AppMap, BadgeEmitter, DbusMessage, DbusParser};
use std::io::BufRead;
use std::process::{Command, Stdio};
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::Duration;
/// How often (seconds) to re-scan open windows and rebuild the app map.
const DISCOVERY_INTERVAL: u64 = 30;
fn main() {
env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("info"))
.format_timestamp(None)
.init();
let app_map = Arc::new(Mutex::new(AppMap::new()));
install_signal_handler(&app_map);
run_initial_discovery(&app_map);
spawn_discovery_thread(&app_map);
run_monitor_loop(&app_map);
}
fn install_signal_handler(app_map: &Arc<Mutex<AppMap>>) {
let app_map_sig = Arc::clone(app_map);
ctrlc::handle(move || {
info!("shutting down, clearing badges...");
let map = app_map_sig.lock().unwrap();
BadgeEmitter::clear_all(&map.all_desktop_ids());
std::process::exit(0);
});
}
fn run_initial_discovery(app_map: &Arc<Mutex<AppMap>>) {
let new_map = notification_badge::discover_apps();
let mut map = app_map.lock().unwrap();
if map.update_patterns(new_map) {
log_discovered(&map);
} else {
warn!("no apps discovered, will retry...");
}
}
fn spawn_discovery_thread(app_map: &Arc<Mutex<AppMap>>) {
let app_map_disc = Arc::clone(app_map);
thread::spawn(move || loop {
thread::sleep(Duration::from_secs(DISCOVERY_INTERVAL));
let new_map = notification_badge::discover_apps();
let mut map = app_map_disc.lock().unwrap();
if map.update_patterns(new_map) {
log_discovered(&map);
}
});
}
fn run_monitor_loop(app_map: &Arc<Mutex<AppMap>>) {
let mut monitor = Command::new("dbus-monitor")
.args(["--session"])
.stdout(Stdio::piped())
.stderr(Stdio::null())
.spawn()
.expect("failed to start dbus-monitor");
let stdout = monitor
.stdout
.take()
.expect("failed to capture dbus-monitor stdout");
let reader = std::io::BufReader::new(stdout);
let mut parser = DbusParser::new();
for line in reader.lines() {
let line = match line {
Ok(l) => l,
Err(e) => {
error!("read error: {e}");
break;
}
};
if let Some(msg) = parser.feed_line(&line) {
handle_message(msg, app_map);
}
}
if let Some(msg) = parser.flush() {
handle_message(msg, app_map);
}
error!("dbus-monitor exited unexpectedly");
let map = app_map.lock().unwrap();
BadgeEmitter::clear_all(&map.all_desktop_ids());
}
fn handle_message(msg: DbusMessage, app_map: &Arc<Mutex<AppMap>>) {
let mut map = app_map.lock().unwrap();
match msg {
DbusMessage::Notify {
serial,
app_name,
replaces_id,
desktop_entry_hint,
} => {
let hint_ref = desktop_entry_hint.as_deref().unwrap_or("");
if let Some(desktop_id) = map.match_app(&[&app_name, hint_ref]) {
map.record_notify(serial, replaces_id, &desktop_id);
}
}
DbusMessage::NotifyReply {
reply_serial,
notification_id,
} => {
if let Some((desktop_id, count)) = map.resolve_reply(reply_serial, notification_id) {
BadgeEmitter::emit(&desktop_id, count);
info!("+ [{notification_id}] {desktop_id} (count: {count})");
}
}
DbusMessage::NotificationClosed { notification_id } => {
if let Some((desktop_id, count)) = map.notification_closed(notification_id) {
BadgeEmitter::emit(&desktop_id, count);
info!("- [{notification_id}] {desktop_id} (count: {count})");
}
}
}
}
fn log_discovered(map: &AppMap) {
let mut apps: Vec<_> = map.patterns().values().collect();
apps.sort();
apps.dedup();
info!(
"discovered apps: [{}]",
apps.iter()
.map(|s| s.as_str())
.collect::<Vec<_>>()
.join(", ")
);
}
/// Minimal signal handler using libc.
mod ctrlc {
pub fn handle<F: Fn() + Send + 'static>(handler: F) {
unsafe {
libc::signal(
libc::SIGINT,
signal_handler as *const () as libc::sighandler_t,
);
libc::signal(
libc::SIGTERM,
signal_handler as *const () as libc::sighandler_t,
);
}
HANDLER.lock().unwrap().replace(Box::new(move || handler()));
}
use std::sync::Mutex;
static HANDLER: Mutex<Option<Box<dyn Fn() + Send>>> = Mutex::new(None);
extern "C" fn signal_handler(_sig: libc::c_int) {
if let Ok(guard) = HANDLER.lock() {
if let Some(ref handler) = *guard {
handler();
}
}
}
}
|
