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|
mod handlers;
use std::collections::HashSet;
use threadpool::ThreadPool;
use crossbeam_channel::{Sender, Receiver};
use languageserver_types::Url;
use libanalysis::{World, WorldState};
use {
req, dispatch,
Task, Result,
io::{Io, RawMsg, RawRequest, RawNotification},
util::FilePath,
main_loop::handlers::{
handle_syntax_tree,
handle_extend_selection,
publish_diagnostics,
publish_decorations,
handle_document_symbol,
handle_code_action,
},
};
pub(super) fn main_loop(
io: &mut Io,
world: &mut WorldState,
pool: &mut ThreadPool,
sender: Sender<Task>,
receiver: Receiver<Task>,
) -> Result<()> {
info!("server initialized, serving requests");
let mut next_request_id = 0;
let mut pending_requests: HashSet<u64> = HashSet::new();
loop {
enum Event {
Msg(RawMsg),
Task(Task),
ReceiverDead,
}
let event = select! {
recv(io.receiver(), msg) => match msg {
Some(msg) => Event::Msg(msg),
None => Event::ReceiverDead,
},
recv(receiver, task) => Event::Task(task.unwrap()),
};
match event {
Event::ReceiverDead => {
io.cleanup_receiver()?;
unreachable!();
}
Event::Task(task) => {
match task {
Task::Request(mut request) => {
request.id = next_request_id;
pending_requests.insert(next_request_id);
next_request_id += 1;
io.send(RawMsg::Request(request));
}
Task::Respond(response) =>
io.send(RawMsg::Response(response)),
Task::Notify(n) =>
io.send(RawMsg::Notification(n)),
Task::Die(error) =>
return Err(error),
}
continue;
}
Event::Msg(msg) => {
match msg {
RawMsg::Request(req) => {
if !on_request(io, world, pool, &sender, req)? {
return Ok(());
}
}
RawMsg::Notification(not) => {
on_notification(io, world, pool, &sender, not)?
}
RawMsg::Response(resp) => {
error!("unexpected response: {:?}", resp)
}
}
}
};
}
}
fn on_request(
io: &mut Io,
world: &WorldState,
pool: &ThreadPool,
sender: &Sender<Task>,
req: RawRequest,
) -> Result<bool> {
let mut req = Some(req);
handle_request_on_threadpool::<req::SyntaxTree>(
&mut req, pool, world, sender, handle_syntax_tree,
)?;
handle_request_on_threadpool::<req::ExtendSelection>(
&mut req, pool, world, sender, handle_extend_selection,
)?;
handle_request_on_threadpool::<req::DocumentSymbolRequest>(
&mut req, pool, world, sender, handle_document_symbol,
)?;
handle_request_on_threadpool::<req::CodeActionRequest>(
&mut req, pool, world, sender, handle_code_action,
)?;
// dispatch::handle_request::<req::ExecuteCommand, _>(&mut req, |(), resp| {
// let world = world.snapshot();
// let sender = sender.clone();
// pool.execute(move || {
// let task = match handle_execute_command(world, params) {
// Ok(req) => Task::Request(req),
// Err(e) => Task::Die(e),
// };
// sender.send(task)
// });
//
// let resp = resp.into_response(Ok(()))?;
// io.send(RawMsg::Response(resp));
// shutdown = true;
// Ok(())
// })?;
let mut shutdown = false;
dispatch::handle_request::<req::Shutdown, _>(&mut req, |(), resp| {
let resp = resp.into_response(Ok(()))?;
io.send(RawMsg::Response(resp));
shutdown = true;
Ok(())
})?;
if shutdown {
info!("lifecycle: initiating shutdown");
return Ok(false);
}
if let Some(req) = req {
error!("unknown method: {:?}", req);
io.send(RawMsg::Response(dispatch::unknown_method(req.id)?));
}
Ok(true)
}
fn on_notification(
io: &mut Io,
world: &mut WorldState,
pool: &ThreadPool,
sender: &Sender<Task>,
not: RawNotification,
) -> Result<()> {
let mut not = Some(not);
dispatch::handle_notification::<req::DidOpenTextDocument, _>(&mut not, |params| {
let path = params.text_document.file_path()?;
world.change_overlay(path, Some(params.text_document.text));
update_file_notifications_on_threadpool(
pool, world.snapshot(), sender.clone(), params.text_document.uri,
);
Ok(())
})?;
dispatch::handle_notification::<req::DidChangeTextDocument, _>(&mut not, |mut params| {
let path = params.text_document.file_path()?;
let text = params.content_changes.pop()
.ok_or_else(|| format_err!("empty changes"))?
.text;
world.change_overlay(path, Some(text));
update_file_notifications_on_threadpool(
pool, world.snapshot(), sender.clone(), params.text_document.uri,
);
Ok(())
})?;
dispatch::handle_notification::<req::DidCloseTextDocument, _>(&mut not, |params| {
let path = params.text_document.file_path()?;
world.change_overlay(path, None);
let not = req::PublishDiagnosticsParams {
uri: params.text_document.uri,
diagnostics: Vec::new(),
};
let not = dispatch::send_notification::<req::PublishDiagnostics>(not);
io.send(RawMsg::Notification(not));
Ok(())
})?;
if let Some(not) = not {
error!("unhandled notification: {:?}", not);
}
Ok(())
}
fn handle_request_on_threadpool<R: req::ClientRequest>(
req: &mut Option<RawRequest>,
pool: &ThreadPool,
world: &WorldState,
sender: &Sender<Task>,
f: fn(World, R::Params) -> Result<R::Result>,
) -> Result<()>
{
dispatch::handle_request::<R, _>(req, |params, resp| {
let world = world.snapshot();
let sender = sender.clone();
pool.execute(move || {
let res = f(world, params);
let task = match resp.into_response(res) {
Ok(resp) => Task::Respond(resp),
Err(e) => Task::Die(e),
};
sender.send(task);
});
Ok(())
})
}
fn update_file_notifications_on_threadpool(
pool: &ThreadPool,
world: World,
sender: Sender<Task>,
uri: Url,
) {
pool.execute(move || {
match publish_diagnostics(world.clone(), uri.clone()) {
Err(e) => {
error!("failed to compute diagnostics: {:?}", e)
}
Ok(params) => {
let not = dispatch::send_notification::<req::PublishDiagnostics>(params);
sender.send(Task::Notify(not));
}
}
match publish_decorations(world, uri) {
Err(e) => {
error!("failed to compute decorations: {:?}", e)
}
Ok(params) => {
let not = dispatch::send_notification::<req::PublishDecorations>(params);
sender.send(Task::Notify(not))
}
}
});
}
|
