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mod client;
mod transport;
pub use jsonrpc_core as jsonrpc;
pub use lsp_types as lsp;
pub use once_cell::sync::{Lazy, OnceCell};
pub use client::Client;
pub use lsp::{Position, Url};
use thiserror::Error;
use std::{collections::HashMap, sync::Arc};
#[derive(Error, Debug)]
pub enum Error {
#[error("protocol error: {0}")]
Rpc(#[from] jsonrpc::Error),
#[error("failed to parse: {0}")]
Parse(#[from] serde_json::Error),
#[error("request timed out")]
Timeout,
#[error(transparent)]
Other(#[from] anyhow::Error),
}
pub mod util {
use super::*;
pub fn lsp_pos_to_pos(doc: &helix_core::RopeSlice, pos: lsp::Position) -> usize {
let line = doc.line_to_char(pos.line as usize);
let line_start = doc.char_to_utf16_cu(line);
doc.utf16_cu_to_char(pos.character as usize + line_start)
}
pub fn pos_to_lsp_pos(doc: &helix_core::RopeSlice, pos: usize) -> lsp::Position {
let line = doc.char_to_line(pos);
let line_start = doc.char_to_utf16_cu(line);
let col = doc.char_to_utf16_cu(pos) - line_start;
lsp::Position::new(line as u32, col as u32)
}
}
#[derive(Debug, PartialEq, Clone)]
pub enum Notification {
PublishDiagnostics(lsp::PublishDiagnosticsParams),
}
impl Notification {
pub fn parse(method: &str, params: jsonrpc::Params) -> Notification {
use lsp::notification::Notification as _;
match method {
lsp::notification::PublishDiagnostics::METHOD => {
let params: lsp::PublishDiagnosticsParams = params
.parse()
.expect("Failed to parse PublishDiagnostics params");
// TODO: need to loop over diagnostics and distinguish them by URI
Notification::PublishDiagnostics(params)
}
_ => unimplemented!("unhandled notification: {}", method),
}
}
}
pub use jsonrpc::Call;
type LanguageId = String;
pub static REGISTRY: Lazy<Registry> = Lazy::new(Registry::init);
pub struct Registry {
inner: HashMap<LanguageId, OnceCell<Arc<Client>>>,
}
impl Registry {
pub fn init() -> Self {
Self {
inner: HashMap::new(),
}
}
pub fn get(&self, id: &str, ex: &smol::Executor) -> Option<Arc<Client>> {
// TODO: use get_or_try_init and propagate the error
self.inner
.get(id)
.map(|cell| {
cell.get_or_init(|| {
// TODO: lookup defaults for id (name, args)
// initialize a new client
let client = Client::start(&ex, "rust-analyzer", &[]);
// TODO: also call initialize().await()
Arc::new(client)
})
})
.cloned()
}
}
// REGISTRY = HashMap<LanguageId, Lazy/OnceCell<Arc<RwLock<Client>>>
// spawn one server per language type, need to spawn one per workspace if server doesn't support
// workspaces
//
// could also be a client per root dir
//
// storing a copy of Option<Arc<RwLock<Client>>> on Document would make the LSP client easily
// accessible during edit/save callbacks
//
// the event loop needs to process all incoming streams, maybe we can just have that be a separate
// task that's continually running and store the state on the client, then use read lock to
// retrieve data during render
// -> PROBLEM: how do you trigger an update on the editor side when data updates?
//
// -> The data updates should pull all events until we run out so we don't frequently re-render
|
