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346 lines
10 KiB
346 lines
10 KiB
use clap::{arg, App};
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use config::{
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Hotkey,
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Modifier,
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};
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use rdev::{
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Event,
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EventType::{
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KeyPress,
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KeyRelease,
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},
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Key,
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};
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use std::{
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cell::RefCell,
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thread,
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sync::{
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Mutex,
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Arc,
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mpsc::{
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sync_channel,
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SyncSender,
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},
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},
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env, fs,
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io::prelude::*,
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os::unix::net::UnixStream,
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os::unix::net::UnixListener,
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path::Path,
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process::{exit, id},
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time::SystemTime,
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};
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use sysinfo::{ProcessExt, System, SystemExt};
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mod config;
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#[derive(PartialEq)]
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pub struct LastHotkey {
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hotkey: config::Hotkey,
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ran_at: SystemTime,
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}
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pub fn key_listener(am_mode: Arc<Mutex<Option<String>>>, tx: SyncSender<Hotkey>) {
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let args = set_flags().get_matches();
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env::set_var("RUST_LOG", "sohkd=warn");
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if args.is_present("debug") {
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env::set_var("RUST_LOG", "sohkd=trace");
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}
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let pidfile: String = String::from("/tmp/sohkd.pid");
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if Path::new(&pidfile).exists() {
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log::trace!("Reading {} file and checking for running instances.", pidfile);
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let sohkd_pid = match fs::read_to_string(&pidfile) {
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Ok(sohkd_pid) => sohkd_pid,
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Err(e) => {
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log::error!("Unable to read {} to check all running instances", e);
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exit(1);
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}
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};
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log::debug!("Previous PID: {}", sohkd_pid);
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let mut sys = System::new_all();
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sys.refresh_all();
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for (pid, process) in sys.processes() {
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if pid.to_string() == sohkd_pid && process.exe() == env::current_exe().unwrap() {
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log::error!("sohkd is already running!");
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exit(1);
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}
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}
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}
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match fs::write(&pidfile, id().to_string()) {
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Ok(_) => {}
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Err(e) => {
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log::error!("Unable to write to {}: {}", pidfile, e);
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exit(1);
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}
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}
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let config_file_path: std::path::PathBuf;
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if args.is_present("config") {
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config_file_path = Path::new(args.value_of("config").unwrap()).to_path_buf();
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} else {
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config_file_path = check_config_xdg();
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}
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log::debug!("Using config file path: {:#?}", config_file_path);
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if !config_file_path.exists() {
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log::error!("{:#?} doesn't exist", config_file_path);
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exit(1);
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}
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let hotkeys = match config::load(config_file_path) {
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Err(e) => {
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log::error!("Config Error: {}", e);
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exit(1);
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}
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Ok(out) => out,
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};
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for hotkey in &hotkeys {
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log::debug!("hotkey: {:#?}", hotkey);
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}
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let current_keys: RefCell<Vec<Key>> = RefCell::new(Vec::new());
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let last_keys: RefCell<Vec<Key>> = RefCell::new(Vec::new());
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let rgrab = rdev::grab(move |ev| {
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// If this is a repeated key sequence (i.e., polled 2nd+ time while same combo is held), then
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if !is_new_key_event(&ev, &mut current_keys.borrow_mut(), &mut last_keys.borrow_mut()) {
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return Some(ev);
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}
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let mode = am_mode.lock().expect("thread crashed due to not being able to lock mutex!");
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let hotkey = hotkey_match(¤t_keys.borrow(), &mode, &hotkeys);
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match hotkey {
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Some(hk) => {
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// needed so the value can be used after sending it down the channel
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let consume = hk.consume.clone();
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match tx.send(hk) {
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Ok(_) => log::trace!("Hotkey sent down channel successfully!"),
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Err(e) => log::error!("Hotkey could not be sent down channel! {:?}", e),
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}
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if consume { return None; }
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else { return Some(ev); }
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},
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None => {
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log::trace!("hotkey not found");
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return Some(ev);
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}
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}
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});
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match rgrab {
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Ok(_) => log::debug!("rdev::grab has run successfully!"),
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Err(e) => log::error!("rdev::grab returned an error: {:?}", e),
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}
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}
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pub fn key_to_mod(key: &Key) -> Option<Modifier> {
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match key {
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Key::MetaLeft => Some(config::Modifier::Super),
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Key::MetaRight => Some(config::Modifier::Super),
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Key::Alt => Some(config::Modifier::Alt),
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Key::AltGr => Some(config::Modifier::Alt),
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Key::ControlLeft => Some(config::Modifier::Control),
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Key::ControlRight => Some(config::Modifier::Control),
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Key::ShiftLeft => Some(config::Modifier::Shift),
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Key::ShiftRight => Some(config::Modifier::Shift),
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_ => None
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}
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}
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pub fn get_modifiers(keys: &Vec<Key>) -> Vec<Modifier> {
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keys.iter().filter_map(key_to_mod).collect()
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}
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pub fn is_mod(key: &Key) -> bool {
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match key {
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Key::MetaLeft => true,
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Key::MetaRight => true,
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Key::Alt => true,
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Key::AltGr => true,
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Key::ControlLeft => true,
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Key::ControlRight => true,
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Key::ShiftLeft => true,
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Key::ShiftRight => true,
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_ => false
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}
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}
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pub fn get_keysym(keys: &Vec<Key>) -> Option<Key> {
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for key in keys {
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if !is_mod(key) { return Some(*key); }
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}
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None
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}
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pub fn hotkey_match(current_keys: &Vec<Key>, mode: &Option<String>, hotkeys: &Vec<config::Hotkey>) -> Option<config::Hotkey> {
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for key in hotkeys {
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log::trace!("hotkey info: {:#?}", key);
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let keysym = get_keysym(¤t_keys);
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log::trace!("\tkeysym: {:#?}", keysym);
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log::trace!("\tmods: {:#?}", get_modifiers(¤t_keys));
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log::trace!("\tmode: {:#?}", mode);
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if key.modifiers == get_modifiers(¤t_keys)
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&& (keysym.is_some() && key.keysym == keysym.unwrap())
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&& (key.mode.is_none() || key.mode == *mode) {
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return Some(key.clone());
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}
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}
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None
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}
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pub fn is_new_key_event(event: &Event, current_keys: &mut Vec<Key>, last_keys: &mut Vec<Key>) -> bool {
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match event.event_type {
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KeyPress(x) => {
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log::trace!("KeyPress: {:#?}", x);
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*last_keys = current_keys.clone();
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current_keys.push(x);
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current_keys.dedup();
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// if there is a new key pressed/released and it is not a repeat event
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if last_keys != current_keys {
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log::trace!("KEYS: {:?}", current_keys);
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true
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} else {
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false
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}
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},
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KeyRelease(x) => {
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log::trace!("KeyRelease: {:#?}", x);
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*last_keys = current_keys.clone();
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// remove just released key from curent keys
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current_keys.retain(|&k| k != x);
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false
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},
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_ => false
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}
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}
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static MODE_SOCK: &str = "/tmp/sohkctl.sock";
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pub fn listen_for_mode_change(mode_mutex: Arc<Mutex<Option<String>>>) -> std::io::Result<()> {
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if Path::new(MODE_SOCK).exists() {
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log::trace!("Sockfile exists, attempting to remove it.");
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match fs::remove_file(MODE_SOCK) {
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Ok(_) => {
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log::debug!("Removed old socket file");
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}
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Err(e) => {
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log::error!("Error removing the socket file!: {}", e);
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log::error!("You can manually remove the socket file: {}", MODE_SOCK);
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exit(1);
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}
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};
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}
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let listener = UnixListener::bind(MODE_SOCK)?;
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loop {
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match listener.accept() {
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Ok((mut socket, addr)) => {
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let mut response = String::new();
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socket.read_to_string(&mut response)?;
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let mut mode = mode_mutex.lock().expect("socket thread dies because of inability to lock mode!");
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log::debug!("socket: {:?} Address: {:?}, response: {:?}", socket, addr, response);
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*mode = Some(response);
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},
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Err(e) => log::error!("accept function failed! {:?}", e),
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}
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}
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}
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pub fn main() {
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env_logger::init();
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log::trace!("Logger initialized.");
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let am_mode: Arc<Mutex<Option<String>>> = Arc::new(Mutex::new(None));
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let k_am_mode = Arc::clone(&am_mode);
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let m_am_mode = Arc::clone(&am_mode);
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let (tx, rx) = sync_channel::<Hotkey>(1024);
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let key_receiver = thread::spawn(move || {
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loop {
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match rx.recv() {
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Ok(hk) => {
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match sock_send(&hk.command) {
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Ok(_) => {
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log::debug!("Successful sending of command to server process.");
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}
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Err(e) => {
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log::debug!("Error sending a command over the socket! {:?}", e);
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}
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}
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},
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Err(e) => {
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log::debug!("Error receiving key on key_sender thread. {:?}", e);
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}
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}
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}
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});
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let key_handler_listener = thread::spawn(move || {
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key_listener(k_am_mode, tx);
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});
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let mode_updater = thread::spawn(move || {
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let res = listen_for_mode_change(m_am_mode);
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match res {
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Ok(_) => log::trace!("Finished mode changer!"),
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Err(e) => log::error!("Error setting up mode socket: {}", e),
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}
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});
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log::trace!("Threads set up");
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mode_updater.join().unwrap();
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key_receiver.join().unwrap();
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key_handler_listener.join().unwrap();
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}
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pub fn set_flags() -> App<'static> {
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let app = App::new("sohkd")
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.version(env!("CARGO_PKG_VERSION"))
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.author(env!("CARGO_PKG_AUTHORS"))
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.about("Simple Wayland HotKey Daemon")
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.arg(
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arg!(-c --config <CONFIG_FILE_PATH>)
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.required(false)
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.takes_value(true)
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.help("Set a custom config file path."),
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)
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.arg(
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arg!(-C --cooldown <COOLDOWN_IN_MS>)
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.required(false)
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.takes_value(true)
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.help("Set a custom repeat cooldown duration. Default is 250ms."),
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)
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.arg(arg!(-d - -debug).required(false).help("Enable debug mode."));
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app
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}
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pub fn check_config_xdg() -> std::path::PathBuf {
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let config_file_path: std::path::PathBuf;
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match env::var("XDG_CONFIG_HOME") {
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Ok(val) => {
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config_file_path = Path::new(&val).join("sohkd/sohkdrc");
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log::debug!("XDG_CONFIG_HOME exists: {:#?}", val);
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return config_file_path;
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}
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Err(_) => {
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log::error!("XDG_CONFIG_HOME has not been set.");
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config_file_path = Path::new("/etc/sohkd/sohkdrc").to_path_buf();
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log::warn!(
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"Note: Due to the design of the application, the invoking user is always root."
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);
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log::warn!("You can set a custom config file with the -c option.");
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log::warn!("Adding your user to the input group could solve this.");
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log::warn!("However that's a massive security flaw and basically defeats the purpose of using wayland.");
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log::warn!("The following issue may be addressed in the future, but it is certainly not a priority right now.");
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}
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}
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config_file_path
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}
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fn sock_send(command: &str) -> std::io::Result<()> {
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let mut stream = UnixStream::connect("/tmp/sohkd.sock")?;
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stream.write_all(command.as_bytes())?;
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Ok(())
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}
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