mod client; mod select_all; 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 helix_core::syntax::LanguageConfiguration; 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::*; use helix_core::{Range, RopeSlice, State, Transaction}; pub fn lsp_pos_to_pos(doc: 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(line_start + pos.character as usize) } pub fn pos_to_lsp_pos(doc: RopeSlice, pos: usize) -> lsp::Position { let line = doc.char_to_line(pos); let line_start = doc.char_to_utf16_cu(doc.line_to_char(line)); let col = doc.char_to_utf16_cu(pos) - line_start; lsp::Position::new(line as u32, col as u32) } pub fn range_to_lsp_range(doc: RopeSlice, range: Range) -> lsp::Range { let start = pos_to_lsp_pos(doc, range.from()); let end = pos_to_lsp_pos(doc, range.to()); lsp::Range::new(start, end) } pub fn generate_transaction_from_edits( state: &State, edits: Vec, ) -> Transaction { let doc = state.doc.slice(..); Transaction::change( &state.doc, edits.into_iter().map(|edit| { // simplify "" into None for cleaner changesets let replacement = if !edit.new_text.is_empty() { Some(edit.new_text.into()) } else { None }; let start = lsp_pos_to_pos(doc, edit.range.start); let end = lsp_pos_to_pos(doc, edit.range.end); (start, end, replacement) }), ) } // apply_insert_replace_edit } #[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; use crate::select_all::SelectAll; use smol::channel::Receiver; pub struct Registry { inner: HashMap>, pub incoming: SelectAll>, } impl Default for Registry { fn default() -> Self { Self::new() } } impl Registry { pub fn new() -> Self { Self { inner: HashMap::new(), incoming: SelectAll::new(), } } pub fn get( &mut self, language_config: &LanguageConfiguration, ex: &smol::Executor, ) -> Option> { // TODO: propagate the error if let Some(config) = &language_config.language_server_config { // avoid borrow issues let inner = &mut self.inner; let s_incoming = &self.incoming; let language_server = inner .entry(language_config.scope.clone()) // can't use entry with Borrow keys: https://github.com/rust-lang/rfcs/pull/1769 .or_insert_with(|| { // TODO: lookup defaults for id (name, args) // initialize a new client let (mut client, incoming) = Client::start(&ex, &config.command, &config.args); // TODO: run this async without blocking smol::block_on(client.initialize()).unwrap(); s_incoming.push(incoming); Arc::new(client) }) .clone(); return Some(language_server); } None } } // REGISTRY = HashMap>> // 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>> 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 // // // v2: // // there should be a registry of lsp clients, one per language type (or workspace). // the clients should lazy init on first access // the client.initialize() should be called async and we buffer any requests until that completes // there needs to be a way to process incoming lsp messages from all clients. // -> notifications need to be dispatched to wherever // -> requests need to generate a reply and travel back to the same lsp!