mirror of https://github.com/k0kubun/xremap
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
9.2 KiB
Rust
269 lines
9.2 KiB
Rust
use crate::config::Config;
|
|
use crate::device::{device_watcher, get_input_devices, output_device};
|
|
use crate::event_handler::EventHandler;
|
|
use anyhow::{anyhow, bail, Context};
|
|
use clap::{AppSettings, ArgEnum, IntoApp, Parser};
|
|
use clap_complete::Shell;
|
|
use config::{config_watcher, load_config};
|
|
use device::InputDevice;
|
|
use evdev::EventType;
|
|
use nix::libc::ENODEV;
|
|
use nix::sys::inotify::{AddWatchFlags, Inotify, InotifyEvent};
|
|
use nix::sys::select::select;
|
|
use nix::sys::select::FdSet;
|
|
use nix::sys::timerfd::{ClockId, TimerFd, TimerFlags};
|
|
use std::collections::HashMap;
|
|
use std::io::stdout;
|
|
use std::os::unix::io::{AsRawFd, RawFd};
|
|
use std::path::PathBuf;
|
|
|
|
mod client;
|
|
mod config;
|
|
mod device;
|
|
mod event_handler;
|
|
|
|
#[derive(Parser, Debug)]
|
|
#[clap(version, global_setting(AppSettings::DeriveDisplayOrder))]
|
|
struct Opts {
|
|
/// Include a device name or path
|
|
#[clap(long, use_delimiter = true)]
|
|
device: Vec<String>,
|
|
/// Ignore a device name or path
|
|
#[clap(long, use_delimiter = true)]
|
|
ignore: Vec<String>,
|
|
/// Targets to watch
|
|
///
|
|
/// - device: add new devices automatically
|
|
/// - config: reload the config automatically
|
|
#[clap(
|
|
long,
|
|
arg_enum,
|
|
min_values = 0,
|
|
use_delimiter = true,
|
|
require_equals = true,
|
|
default_missing_value = "device",
|
|
verbatim_doc_comment,
|
|
hide_possible_values = true,
|
|
// Separating the help like this is necessary due to
|
|
// https://github.com/clap-rs/clap/issues/3312
|
|
help = "Targets to watch [possible values: device, config]"
|
|
)]
|
|
watch: Vec<WatchTargets>,
|
|
/// Generate shell completions
|
|
///
|
|
/// You can use them by storing in your shells completion file or by running
|
|
/// - in bash: eval "$(xremap --completions bash)"
|
|
/// - in fish: xremap --completions fish | source
|
|
#[clap(long, arg_enum, display_order = 100, value_name = "SHELL", verbatim_doc_comment)]
|
|
completions: Option<Shell>,
|
|
/// Config file
|
|
#[clap(required_unless_present = "completions")]
|
|
config: Option<PathBuf>,
|
|
}
|
|
|
|
#[derive(ArgEnum, Clone, Copy, Debug, PartialEq, Eq)]
|
|
enum WatchTargets {
|
|
/// Device to add new devices automatically
|
|
Device,
|
|
/// Config to reload the config automatically
|
|
Config,
|
|
}
|
|
|
|
enum Event {
|
|
ReloadConfig,
|
|
ReloadDevices,
|
|
}
|
|
|
|
fn main() -> anyhow::Result<()> {
|
|
env_logger::init();
|
|
|
|
let Opts {
|
|
device: device_filter,
|
|
ignore: ignore_filter,
|
|
watch,
|
|
config,
|
|
completions,
|
|
} = Opts::parse();
|
|
|
|
if let Some(shell) = completions {
|
|
clap_complete::generate(shell, &mut Opts::into_app(), "xremap", &mut stdout());
|
|
return Ok(());
|
|
}
|
|
|
|
// Configuration
|
|
let config_path = config.expect("config is set, if not completions");
|
|
let mut config = match config::load_config(&config_path) {
|
|
Ok(config) => config,
|
|
Err(e) => bail!("Failed to load config '{}': {}", config_path.display(), e),
|
|
};
|
|
let watch_devices = watch.contains(&WatchTargets::Device);
|
|
let watch_config = watch.contains(&WatchTargets::Config);
|
|
|
|
// Event listeners
|
|
let output_device = match output_device() {
|
|
Ok(output_device) => output_device,
|
|
Err(e) => bail!("Failed to prepare an output device: {}", e),
|
|
};
|
|
let timer = TimerFd::new(ClockId::CLOCK_MONOTONIC, TimerFlags::empty())?;
|
|
let timer_fd = timer.as_raw_fd();
|
|
let mut handler = EventHandler::new(output_device, timer, &config.default_mode);
|
|
let mut input_devices = match get_input_devices(&device_filter, &ignore_filter, watch_devices) {
|
|
Ok(input_devices) => input_devices,
|
|
Err(e) => bail!("Failed to prepare input devices: {}", e),
|
|
};
|
|
let device_watcher = device_watcher(watch_devices).context("Setting up device watcher")?;
|
|
let config_watcher = config_watcher(watch_config, &config_path).context("Setting up config watcher")?;
|
|
let watchers: Vec<_> = device_watcher.iter().chain(config_watcher.iter()).collect();
|
|
|
|
// Main loop
|
|
loop {
|
|
match 'event_loop: loop {
|
|
let readable_fds = select_readable(input_devices.values(), &watchers, timer_fd)?;
|
|
if readable_fds.contains(timer_fd) {
|
|
if let Err(error) = handler.timeout_override() {
|
|
println!("Error on remap timeout: {error}")
|
|
}
|
|
}
|
|
|
|
for input_device in input_devices.values_mut() {
|
|
if readable_fds.contains(input_device.as_raw_fd()) {
|
|
if !handle_input_events(input_device, &mut handler, &mut config)? {
|
|
println!("Found a removed device. Reselecting devices.");
|
|
break 'event_loop Event::ReloadDevices;
|
|
}
|
|
}
|
|
}
|
|
|
|
if let Some(inotify) = device_watcher {
|
|
if let Ok(events) = inotify.read_events() {
|
|
handle_device_changes(events, &mut input_devices, &device_filter, &ignore_filter)?;
|
|
}
|
|
}
|
|
if let Some(inotify) = config_watcher {
|
|
if let Ok(events) = inotify.read_events() {
|
|
if !handle_config_changes(events, &mut input_devices, &device_filter, &ignore_filter, &config_path)?
|
|
{
|
|
break 'event_loop Event::ReloadConfig;
|
|
}
|
|
}
|
|
}
|
|
} {
|
|
Event::ReloadDevices => {
|
|
for input_device in input_devices.values_mut() {
|
|
input_device.ungrab();
|
|
}
|
|
input_devices = match get_input_devices(&device_filter, &ignore_filter, watch_devices) {
|
|
Ok(input_devices) => input_devices,
|
|
Err(e) => bail!("Failed to prepare input devices: {}", e),
|
|
};
|
|
}
|
|
Event::ReloadConfig => match (config.modify_time, config_path.metadata().and_then(|m| m.modified())) {
|
|
(Some(last_mtime), Ok(current_mtim)) if last_mtime == current_mtim => continue,
|
|
_ => {
|
|
if let Ok(c) = load_config(&config_path) {
|
|
println!("Reloading Config");
|
|
config = c;
|
|
}
|
|
}
|
|
},
|
|
}
|
|
}
|
|
}
|
|
|
|
fn select_readable<'a>(
|
|
devices: impl Iterator<Item = &'a InputDevice>,
|
|
watchers: &[&Inotify],
|
|
timer_fd: RawFd,
|
|
) -> anyhow::Result<FdSet> {
|
|
let mut read_fds = FdSet::new();
|
|
read_fds.insert(timer_fd);
|
|
for device in devices {
|
|
read_fds.insert(device.as_raw_fd());
|
|
}
|
|
for inotify in watchers {
|
|
read_fds.insert(inotify.as_raw_fd());
|
|
}
|
|
select(None, &mut read_fds, None, None, None)?;
|
|
Ok(read_fds)
|
|
}
|
|
|
|
fn handle_input_events(
|
|
input_device: &mut InputDevice,
|
|
handler: &mut EventHandler,
|
|
config: &mut Config,
|
|
) -> anyhow::Result<bool> {
|
|
match input_device.fetch_events().map_err(|e| (e.raw_os_error(), e)) {
|
|
Err((Some(ENODEV), _)) => {
|
|
return Ok(false);
|
|
}
|
|
Err((_, error)) => return Err(error).context("Error fetching input events"),
|
|
Ok(events) => {
|
|
for event in events {
|
|
if event.event_type() == EventType::KEY {
|
|
handler
|
|
.on_event(event, &config)
|
|
.map_err(|e| anyhow!("Failed handling {event:?}:\n {e:?}"))?;
|
|
} else {
|
|
handler.send_event(event)?;
|
|
}
|
|
}
|
|
return Ok(true);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn handle_device_changes(
|
|
events: Vec<InotifyEvent>,
|
|
input_devices: &mut HashMap<PathBuf, InputDevice>,
|
|
device_filter: &[String],
|
|
ignore_filter: &[String],
|
|
) -> anyhow::Result<()> {
|
|
input_devices.extend(events.into_iter().filter_map(|event| {
|
|
event.name.and_then(|name| {
|
|
let path = PathBuf::from("/dev/input/").join(name);
|
|
let mut device = InputDevice::try_from(path).ok()?;
|
|
if device.is_input_device(device_filter, &ignore_filter) && device.grab() {
|
|
device.print();
|
|
Some(device.into())
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
}));
|
|
Ok(())
|
|
}
|
|
|
|
fn handle_config_changes(
|
|
events: Vec<InotifyEvent>,
|
|
input_devices: &mut HashMap<PathBuf, InputDevice>,
|
|
device_filter: &[String],
|
|
ignore_filter: &[String],
|
|
config_path: &PathBuf,
|
|
) -> anyhow::Result<bool> {
|
|
for event in &events {
|
|
match (event.mask, &event.name) {
|
|
// Dir events
|
|
(_, Some(name)) if name == config_path.file_name().expect("Config path has a file name") => {
|
|
return Ok(false)
|
|
}
|
|
// File events
|
|
(mask, _) if mask.contains(AddWatchFlags::IN_MODIFY) => return Ok(false),
|
|
// Unrelated
|
|
_ => (),
|
|
}
|
|
}
|
|
input_devices.extend(events.into_iter().filter_map(|event| {
|
|
event.name.and_then(|name| {
|
|
let path = PathBuf::from("/dev/input/").join(name);
|
|
let mut device = InputDevice::try_from(path).ok()?;
|
|
if device.is_input_device(&device_filter, &ignore_filter) && device.grab() {
|
|
device.print();
|
|
Some(device.into())
|
|
} else {
|
|
None
|
|
}
|
|
})
|
|
}));
|
|
Ok(true)
|
|
}
|