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|
use std::{
any::type_name,
fs::read_dir,
path::PathBuf,
sync::{
Arc,
OnceLock,
RwLock,
atomic::{
AtomicBool,
Ordering,
},
},
};
use freedesktop_entry_parser as fd;
use mlua::prelude::*;
use notify::RecommendedWatcher;
use rayon::prelude::*;
use url::Url;
use crate::lenses::{
Cache,
Entries,
Entry,
Lense,
};
static APPS_DIR: &'static str = "/usr/share/applications";
static WATCHER: OnceLock<RecommendedWatcher> = OnceLock::new();
#[derive(Default)]
pub struct Application {
cache: RwLock<Cache>,
should_interrupt: AtomicBool,
}
impl Lense for Application {
const NAME: &str = "Application";
const PREFIX: Option<&'static str> = None;
fn init() -> Arc<Self> {
let this = Arc::new(Application::default());
let watcher_this = this.clone();
WATCHER
.set(
notify::recommended_watcher(move |event| {
match event {
Ok(_) => {
// We don't care what specifically changed, just that *it did*
watcher_this.set_cache(Cache::Stale);
}
Err(err) => {
eprintln!("Watch error: {:?}", err)
}
}
})
.expect("Failed to instantiate a watcher"),
)
.expect("Failed to set a watcher");
this
}
#[inline]
fn set_cache(&self, cache: Cache) {
if let Err(err) = self.cache.write().map(|mut place| *place = cache) {
eprintln!(
"Failed to write cache value for {}: {:?}",
type_name::<Self>(),
err
)
}
}
#[inline]
fn get_cache(&self) -> Cache {
match self.cache.read() {
Ok(ok) => ok.clone(),
Err(err) => {
eprintln!(
"Failed to read cache value for {}: {:?}",
type_name::<Self>(),
err
);
Cache::Stale
}
}
}
#[inline]
fn set_interrupt(&self, interrupt: bool) {
// self.should_interrupt.store(interrupt, Ordering::Relaxed)
}
#[inline]
fn get_interrupt(&self) -> bool {
false
// self.should_interrupt.load(Ordering::Relaxed)
}
fn entries(&self, _: &Lua, _: &str) -> Result<Entries, anyhow::Error> {
let entries = read_dir(APPS_DIR)?
.map(|result| result.map(|e| e.path()))
.collect::<Result<Vec<_>, std::io::Error>>()?;
let parsed_entries: Entries = entries
.into_par_iter()
.filter(|path| path.extension().is_some_and(|ext| ext == "desktop"))
.filter_map(|path| parse_entry(path).ok().flatten())
.collect::<Vec<Entry>>()
.into();
Ok(parsed_entries)
}
}
fn parse_entry(path: PathBuf) -> Result<Option<Entry>, ()> {
let Ok(entry) = fd::parse_entry(&path) else {
return Err(());
};
let section = entry.section("Desktop Entry");
let name = section.attr("Name").ok_or(())?.to_string();
if section.attr("Type").ok_or(())? != "Application" {
return Err(());
}
if section.attr("OnlyShowIn").is_some()
|| section.attr("Hidden").is_some()
|| section.attr("NoDisplay").is_some()
{
return Err(());
}
let exec = section.attr("Exec").ok_or(())?.to_string();
let mut new_exec = exec.clone();
for (index, _) in exec.match_indices('%') {
match exec.chars().nth(index + 1).unwrap().to_ascii_lowercase() {
'i' => {
if let Some(icon) = section.attr("Icon") {
new_exec.replace_range(index..index + 2, &format!("--icon {icon}"));
}
}
'c' => new_exec.replace_range(index..index + 2, &name),
'k' => new_exec.replace_range(index..index + 2, Url::from_file_path(&path)?.as_str()),
'f' | 'u' | 'v' | 'm' | 'd' | 'n' => new_exec.replace_range(index..index + 2, ""),
_ => continue,
}
}
Ok(Some(Entry {
message: name,
exec: Some((
new_exec,
section
.attr("Terminal")
.unwrap_or("false")
.parse()
.map_err(drop)?,
)),
}))
}
|
