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use std::{
path::PathBuf,
sync::{Arc, Mutex},
};
use anyhow::Result;
use log::warn;
use notify::{RecommendedWatcher, RecursiveMode, Watcher};
use rustc_hash::FxHashSet;
use crate::{
Document, DocumentLanguage, OpenHandler, Uri, Workspace, WorkspaceSource, WorkspaceSubset,
};
pub struct DocumentWatcher<W> {
workspace: Arc<W>,
watcher: Mutex<RecommendedWatcher>,
watched_paths: Mutex<FxHashSet<PathBuf>>,
}
impl<W> DocumentWatcher<W>
where
W: Workspace + Send + Sync + 'static,
{
pub fn new(workspace: Arc<W>) -> Result<Self> {
let watcher = Self::create_watcher(Arc::clone(&workspace))?;
Ok(Self {
workspace,
watcher: Mutex::new(watcher),
watched_paths: Mutex::default(),
})
}
fn create_watcher(workspace: Arc<W>) -> Result<RecommendedWatcher> {
let watcher = Watcher::new_immediate(move |event: notify::Result<notify::Event>| {
if let Ok(event) = event {
if event.kind.is_modify() {
for path in event.paths {
let _ = workspace.reload(path);
}
}
}
})?;
Ok(watcher)
}
}
impl<W: Workspace> Workspace for DocumentWatcher<W> {
fn open(
&self,
uri: Arc<Uri>,
text: String,
language: DocumentLanguage,
source: WorkspaceSource,
) -> Arc<Document> {
let document = self.workspace.open(uri, text, language, source);
if document.uri.scheme() == "file" {
if let Ok(mut path) = document.uri.to_file_path() {
path.pop();
let mut watched_paths = self.watched_paths.lock().unwrap();
if !watched_paths.contains(&path) {
if let Err(why) = self
.watcher
.lock()
.unwrap()
.watch(&path, RecursiveMode::NonRecursive)
{
warn!(
"Failed to watch folder of document \"{}\": {}",
document.uri, why
);
}
watched_paths.insert(path);
}
}
}
document
}
fn register_open_handler(&self, handler: OpenHandler) {
self.workspace.register_open_handler(handler);
}
fn documents(&self) -> Vec<Arc<Document>> {
self.workspace.documents()
}
fn has(&self, uri: &Uri) -> bool {
self.workspace.has(uri)
}
fn get(&self, uri: &Uri) -> Option<Arc<Document>> {
self.workspace.get(uri)
}
fn close(&self, uri: &Uri) {
self.workspace.close(uri)
}
fn is_open(&self, uri: &Uri) -> bool {
self.workspace.is_open(uri)
}
fn subset(&self, uri: Arc<Uri>) -> Option<WorkspaceSubset> {
self.workspace.subset(uri)
}
}
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