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use crate::deviceinfo::DeviceInfo;
use crate::mapping::*;
use crate::remapper::*;
use anyhow::{Context, Result};
use clap::Parser;
use std::path::PathBuf;
use std::time::Duration;
mod deviceinfo;
mod mapping;
mod remapper;
/// Remap libinput evdev keyboard inputs
#[derive(Debug, Parser)]
#[command(name = "evremap", about, author = "Wez Furlong")]
enum Opt {
/// Rather than running the remapper, list currently available devices.
/// This is helpful to check their names when setting up the initial
/// configuration
ListDevices,
/// Show a list of possible KEY_XXX values
ListKeys,
/// Listen to events and print them out to facilitate learning
/// which keys/buttons have which labels for your device(s)
DebugEvents {
/// Specify the device name of interest
#[arg(long)]
device_name: String,
/// Specify the phys device in case multiple devices have
/// the same name
#[arg(long)]
phys: Option<String>,
},
/// Load a remapper config and run the remapper.
/// This usually requires running as root to obtain exclusive access
/// to the input devices.
Remap {
/// Specify the configuration file to be loaded
#[arg(name = "CONFIG-FILE")]
config_file: PathBuf,
/// Number of seconds for user to release keys on startup
#[arg(short, long, default_value = "2")]
delay: f64,
/// Override the device name specified by the config file
#[arg(long)]
device_name: Option<String>,
/// Override the phys device specified by the config file
#[arg(long)]
phys: Option<String>,
/// If the device isn't found on startup, wait forever
/// until the device is plugged in. This works by polling
/// the set of devices every few seconds. It is not as
/// efficient as setting up a udev rule to spawn evremap,
/// but is simpler to setup ad-hoc.
#[arg(long)]
wait_for_device: bool,
},
}
pub fn list_keys() -> Result<()> {
let mut keys: Vec<String> = EventCode::EV_KEY(KeyCode::KEY_RESERVED)
.iter()
.filter_map(|code| match code {
EventCode::EV_KEY(_) => Some(format!("{}", code)),
_ => None,
})
.collect();
keys.sort();
for key in keys {
println!("{}", key);
}
Ok(())
}
fn setup_logger() {
let mut builder = env_logger::Builder::new();
builder.filter_level(log::LevelFilter::Info);
let env = env_logger::Env::new()
.filter("EVREMAP_LOG")
.write_style("EVREMAP_LOG_STYLE");
builder.parse_env(env);
builder.init();
}
fn get_device(
device_name: &str,
phys: Option<&str>,
wait_for_device: bool,
) -> anyhow::Result<DeviceInfo> {
match deviceinfo::DeviceInfo::with_name(device_name, phys) {
Ok(dev) => return Ok(dev),
Err(err) if !wait_for_device => return Err(err),
Err(err) => {
log::warn!("{err:#}. Will wait until it is attached.");
}
}
const MAX_SLEEP: Duration = Duration::from_secs(10);
const ONE_SECOND: Duration = Duration::from_secs(1);
let mut sleep = ONE_SECOND;
loop {
std::thread::sleep(sleep);
sleep = (sleep + ONE_SECOND).min(MAX_SLEEP);
match deviceinfo::DeviceInfo::with_name(device_name, phys) {
Ok(dev) => return Ok(dev),
Err(err) => {
log::debug!("{err:#}");
}
}
}
}
fn debug_events(device: DeviceInfo) -> Result<()> {
let f =
std::fs::File::open(&device.path).context(format!("opening {}", device.path.display()))?;
let input = evdev_rs::Device::new_from_file(f).with_context(|| {
format!(
"failed to create new Device from file {}",
device.path.display()
)
})?;
loop {
let (status, event) =
input.next_event(evdev_rs::ReadFlag::NORMAL | evdev_rs::ReadFlag::BLOCKING)?;
match status {
evdev_rs::ReadStatus::Success => {
if let EventCode::EV_KEY(key) = event.event_code {
log::info!("{key:?} {}", event.value);
}
}
evdev_rs::ReadStatus::Sync => anyhow::bail!("ReadStatus::Sync!"),
}
}
}
fn main() -> Result<()> {
setup_logger();
let opt = Opt::parse();
match opt {
Opt::ListDevices => deviceinfo::list_devices(),
Opt::ListKeys => list_keys(),
Opt::DebugEvents { device_name, phys } => {
let device_info = get_device(&device_name, phys.as_deref(), false)?;
debug_events(device_info)
}
Opt::Remap {
config_file,
delay,
device_name,
phys,
wait_for_device,
} => {
let mut mapping_config = MappingConfig::from_file(&config_file).context(format!(
"loading MappingConfig from {}",
config_file.display()
))?;
if let Some(device) = device_name {
mapping_config.device_name = Some(device);
}
if let Some(phys) = phys {
mapping_config.phys = Some(phys);
}
let device_name = mapping_config.device_name.as_deref().ok_or_else(|| {
anyhow::anyhow!(
"device_name is missing; \
specify it either in the config file or via the --device-name \
command line option"
)
})?;
log::warn!("Short delay: release any keys now!");
std::thread::sleep(Duration::from_secs_f64(delay));
let device_info =
get_device(device_name, mapping_config.phys.as_deref(), wait_for_device)?;
let mut mapper = InputMapper::create_mapper(device_info.path, mapping_config.mappings)?;
mapper.run_mapper()
}
}
}
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