forked from Mirrors/helix
Improve error typing.
Blaž Hrastnik
4 years ago
parent
ef5e5f9296
commit
81ccca0c6a
@ -0,0 +1,242 @@
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use crate::{
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transport::{Payload, Transport},
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Error, Notification,
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};
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type Result<T> = core::result::Result<T, Error>;
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use helix_core::{State, Transaction};
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// use std::collections::HashMap;
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use jsonrpc_core as jsonrpc;
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use lsp_types as lsp;
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use serde_json::Value;
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use smol::{
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channel::{Receiver, Sender},
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io::{BufReader, BufWriter},
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// prelude::*,
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process::{Child, ChildStderr, Command, Stdio},
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Executor,
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};
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pub struct Client {
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_process: Child,
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stderr: BufReader<ChildStderr>,
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outgoing: Sender<Payload>,
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pub incoming: Receiver<Notification>,
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pub request_counter: u64,
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capabilities: Option<lsp::ServerCapabilities>,
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// TODO: handle PublishDiagnostics Version
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// diagnostics: HashMap<lsp::Url, Vec<lsp::Diagnostic>>,
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}
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impl Client {
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pub fn start(ex: &Executor, cmd: &str, args: &[String]) -> Self {
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let mut process = Command::new(cmd)
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.args(args)
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.stdin(Stdio::piped())
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.stdout(Stdio::piped())
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.stderr(Stdio::piped())
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.spawn()
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.expect("Failed to start language server");
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// smol makes sure the process is reaped on drop, but using kill_on_drop(true) maybe?
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// TODO: do we need bufreader/writer here? or do we use async wrappers on unblock?
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let writer = BufWriter::new(process.stdin.take().expect("Failed to open stdin"));
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let reader = BufReader::new(process.stdout.take().expect("Failed to open stdout"));
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let stderr = BufReader::new(process.stderr.take().expect("Failed to open stderr"));
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let (incoming, outgoing) = Transport::start(ex, reader, writer);
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Client {
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_process: process,
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stderr,
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outgoing,
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incoming,
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request_counter: 0,
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capabilities: None,
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// diagnostics: HashMap::new(),
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}
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}
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fn next_request_id(&mut self) -> jsonrpc::Id {
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let id = jsonrpc::Id::Num(self.request_counter);
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self.request_counter += 1;
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id
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}
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fn to_params(value: Value) -> Result<jsonrpc::Params> {
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use jsonrpc::Params;
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let params = match value {
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Value::Null => Params::None,
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Value::Bool(_) | Value::Number(_) | Value::String(_) => Params::Array(vec![value]),
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Value::Array(vec) => Params::Array(vec),
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Value::Object(map) => Params::Map(map),
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};
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Ok(params)
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}
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pub async fn request<R: lsp::request::Request>(
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&mut self,
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params: R::Params,
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) -> Result<R::Result>
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where
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R::Params: serde::Serialize,
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R::Result: core::fmt::Debug, // TODO: temporary
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{
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let params = serde_json::to_value(params)?;
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let request = jsonrpc::MethodCall {
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jsonrpc: Some(jsonrpc::Version::V2),
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id: self.next_request_id(),
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method: R::METHOD.to_string(),
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params: Self::to_params(params)?,
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};
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let (tx, rx) = smol::channel::bounded::<Result<Value>>(1);
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self.outgoing
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.send(Payload::Request {
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chan: tx,
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value: request,
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})
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.await
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.map_err(|e| Error::Other(e.into()))?;
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let response = rx.recv().await.map_err(|e| Error::Other(e.into()))??;
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let response = serde_json::from_value(response)?;
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// TODO: we should pass request to a sender thread via a channel
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// so it can't be interleaved
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// TODO: responses can be out of order, we need to register a single shot response channel
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Ok(response)
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}
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pub async fn notify<R: lsp::notification::Notification>(
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&mut self,
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params: R::Params,
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) -> Result<()>
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where
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R::Params: serde::Serialize,
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{
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let params = serde_json::to_value(params)?;
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let notification = jsonrpc::Notification {
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jsonrpc: Some(jsonrpc::Version::V2),
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method: R::METHOD.to_string(),
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params: Self::to_params(params)?,
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};
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self.outgoing
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.send(Payload::Notification(notification))
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.await
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.map_err(|e| Error::Other(e.into()))?;
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Ok(())
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}
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// -------------------------------------------------------------------------------------------
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// General messages
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// -------------------------------------------------------------------------------------------
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pub async fn initialize(&mut self) -> Result<()> {
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// TODO: delay any requests that are triggered prior to initialize
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#[allow(deprecated)]
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let params = lsp::InitializeParams {
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process_id: Some(u64::from(std::process::id())),
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root_path: None,
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// root_uri: Some(lsp_types::Url::parse("file://localhost/")?),
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root_uri: None, // set to project root in the future
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initialization_options: None,
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capabilities: lsp::ClientCapabilities::default(),
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trace: None,
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workspace_folders: None,
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client_info: None,
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};
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let response = self.request::<lsp::request::Initialize>(params).await?;
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self.capabilities = Some(response.capabilities);
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// next up, notify<initialized>
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self.notify::<lsp::notification::Initialized>(lsp::InitializedParams {})
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.await?;
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Ok(())
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}
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pub async fn shutdown(&mut self) -> Result<()> {
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self.request::<lsp::request::Shutdown>(()).await
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}
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pub async fn exit(&mut self) -> Result<()> {
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self.notify::<lsp::notification::Exit>(()).await
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}
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// -------------------------------------------------------------------------------------------
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// Text document
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// -------------------------------------------------------------------------------------------
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pub async fn text_document_did_open(&mut self, state: &State) -> Result<()> {
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self.notify::<lsp::notification::DidOpenTextDocument>(lsp::DidOpenTextDocumentParams {
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text_document: lsp::TextDocumentItem {
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uri: lsp::Url::from_file_path(state.path().unwrap()).unwrap(),
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language_id: "rust".to_string(), // TODO: hardcoded for now
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version: state.version,
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text: String::from(&state.doc),
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},
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})
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.await
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}
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// TODO: trigger any time history.commit_revision happens
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pub async fn text_document_did_change(
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&mut self,
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state: &State,
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transaction: &Transaction,
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) -> Result<()> {
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self.notify::<lsp::notification::DidChangeTextDocument>(lsp::DidChangeTextDocumentParams {
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text_document: lsp::VersionedTextDocumentIdentifier::new(
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lsp::Url::from_file_path(state.path().unwrap()).unwrap(),
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state.version,
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),
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content_changes: vec![lsp::TextDocumentContentChangeEvent {
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// range = None -> whole document
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range: None, //Some(Range)
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range_length: None, // u64 apparently deprecated
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text: "".to_string(),
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}], // TODO: probably need old_state here too?
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})
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.await
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}
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// TODO: impl into() TextDocumentIdentifier / VersionedTextDocumentIdentifier for State.
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pub async fn text_document_did_close(&mut self, state: &State) -> Result<()> {
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self.notify::<lsp::notification::DidCloseTextDocument>(lsp::DidCloseTextDocumentParams {
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text_document: lsp::TextDocumentIdentifier::new(
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lsp::Url::from_file_path(state.path().unwrap()).unwrap(),
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),
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})
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.await
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}
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// will_save / will_save_wait_until
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pub async fn text_document_did_save(&mut self) -> anyhow::Result<()> {
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unimplemented!()
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}
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}
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