301 lines
10 KiB
Rust
301 lines
10 KiB
Rust
//! The context or environment in which the language server functions. In our
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//! server implementation this is know as the `WorldState`.
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//!
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//! Each tick provides an immutable snapshot of the state as `WorldSnapshot`.
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use std::{sync::Arc, time::Instant};
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use crossbeam_channel::{unbounded, Receiver, Sender};
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use flycheck::FlycheckHandle;
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use lsp_types::Url;
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use parking_lot::RwLock;
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use ra_db::{CrateId, VfsPath};
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use ra_ide::{Analysis, AnalysisChange, AnalysisHost, FileId};
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use ra_project_model::{CargoWorkspace, ProcMacroClient, ProjectWorkspace, Target};
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use rustc_hash::FxHashMap;
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use crate::{
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config::Config,
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diagnostics::{CheckFixes, DiagnosticCollection},
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document::DocumentData,
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from_proto,
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line_endings::LineEndings,
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main_loop::Task,
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reload::SourceRootConfig,
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request_metrics::{LatestRequests, RequestMetrics},
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thread_pool::TaskPool,
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to_proto::url_from_abs_path,
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Result,
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};
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use ra_prof::profile;
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#[derive(Eq, PartialEq, Copy, Clone)]
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pub(crate) enum Status {
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Loading,
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Ready,
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Invalid,
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NeedsReload,
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}
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impl Default for Status {
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fn default() -> Self {
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Status::Loading
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}
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}
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// Enforces drop order
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pub(crate) struct Handle<H, C> {
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pub(crate) handle: H,
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pub(crate) receiver: C,
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}
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pub(crate) type ReqHandler = fn(&mut GlobalState, lsp_server::Response);
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pub(crate) type ReqQueue = lsp_server::ReqQueue<(String, Instant), ReqHandler>;
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/// `GlobalState` is the primary mutable state of the language server
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///
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/// The most interesting components are `vfs`, which stores a consistent
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/// snapshot of the file systems, and `analysis_host`, which stores our
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/// incremental salsa database.
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///
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/// Note that this struct has more than on impl in various modules!
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pub(crate) struct GlobalState {
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sender: Sender<lsp_server::Message>,
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req_queue: ReqQueue,
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pub(crate) task_pool: Handle<TaskPool<Task>, Receiver<Task>>,
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pub(crate) loader: Handle<Box<dyn vfs::loader::Handle>, Receiver<vfs::loader::Message>>,
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pub(crate) flycheck: Option<FlycheckHandle>,
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pub(crate) flycheck_sender: Sender<flycheck::Message>,
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pub(crate) flycheck_receiver: Receiver<flycheck::Message>,
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pub(crate) config: Config,
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pub(crate) analysis_host: AnalysisHost,
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pub(crate) diagnostics: DiagnosticCollection,
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pub(crate) mem_docs: FxHashMap<VfsPath, DocumentData>,
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pub(crate) vfs: Arc<RwLock<(vfs::Vfs, FxHashMap<FileId, LineEndings>)>>,
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pub(crate) status: Status,
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pub(crate) source_root_config: SourceRootConfig,
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pub(crate) proc_macro_client: ProcMacroClient,
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pub(crate) workspaces: Arc<Vec<ProjectWorkspace>>,
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latest_requests: Arc<RwLock<LatestRequests>>,
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}
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/// An immutable snapshot of the world's state at a point in time.
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pub(crate) struct GlobalStateSnapshot {
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pub(crate) config: Config,
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pub(crate) analysis: Analysis,
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pub(crate) check_fixes: CheckFixes,
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pub(crate) latest_requests: Arc<RwLock<LatestRequests>>,
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mem_docs: FxHashMap<VfsPath, DocumentData>,
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vfs: Arc<RwLock<(vfs::Vfs, FxHashMap<FileId, LineEndings>)>>,
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pub(crate) workspaces: Arc<Vec<ProjectWorkspace>>,
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}
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impl GlobalState {
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pub(crate) fn new(sender: Sender<lsp_server::Message>, config: Config) -> GlobalState {
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let loader = {
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let (sender, receiver) = unbounded::<vfs::loader::Message>();
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let handle: vfs_notify::NotifyHandle =
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vfs::loader::Handle::spawn(Box::new(move |msg| sender.send(msg).unwrap()));
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let handle = Box::new(handle) as Box<dyn vfs::loader::Handle>;
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Handle { handle, receiver }
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};
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let task_pool = {
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let (sender, receiver) = unbounded();
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let handle = TaskPool::new(sender);
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Handle { handle, receiver }
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};
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let analysis_host = AnalysisHost::new(config.lru_capacity);
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let (flycheck_sender, flycheck_receiver) = unbounded();
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GlobalState {
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sender,
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req_queue: ReqQueue::default(),
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task_pool,
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loader,
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flycheck: None,
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flycheck_sender,
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flycheck_receiver,
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config,
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analysis_host,
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diagnostics: Default::default(),
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mem_docs: FxHashMap::default(),
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vfs: Arc::new(RwLock::new((vfs::Vfs::default(), FxHashMap::default()))),
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status: Status::default(),
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source_root_config: SourceRootConfig::default(),
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proc_macro_client: ProcMacroClient::dummy(),
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workspaces: Arc::new(Vec::new()),
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latest_requests: Default::default(),
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}
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}
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pub(crate) fn process_changes(&mut self) -> bool {
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let _p = profile("GlobalState::process_changes");
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let mut fs_changes = Vec::new();
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let mut has_fs_changes = false;
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let change = {
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let mut change = AnalysisChange::new();
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let (vfs, line_endings_map) = &mut *self.vfs.write();
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let changed_files = vfs.take_changes();
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if changed_files.is_empty() {
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return false;
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}
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for file in changed_files {
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if file.is_created_or_deleted() {
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if let Some(path) = vfs.file_path(file.file_id).as_path() {
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fs_changes.push((path.to_path_buf(), file.change_kind));
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has_fs_changes = true;
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}
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}
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let text = if file.exists() {
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let bytes = vfs.file_contents(file.file_id).to_vec();
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match String::from_utf8(bytes).ok() {
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Some(text) => {
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let (text, line_endings) = LineEndings::normalize(text);
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line_endings_map.insert(file.file_id, line_endings);
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Some(Arc::new(text))
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}
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None => None,
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}
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} else {
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None
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};
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change.change_file(file.file_id, text);
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}
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if has_fs_changes {
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let roots = self.source_root_config.partition(&vfs);
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change.set_roots(roots);
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}
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change
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};
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self.analysis_host.apply_change(change);
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self.maybe_refresh(&fs_changes);
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true
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}
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pub(crate) fn snapshot(&self) -> GlobalStateSnapshot {
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GlobalStateSnapshot {
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config: self.config.clone(),
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workspaces: Arc::clone(&self.workspaces),
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analysis: self.analysis_host.analysis(),
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vfs: Arc::clone(&self.vfs),
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latest_requests: Arc::clone(&self.latest_requests),
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check_fixes: Arc::clone(&self.diagnostics.check_fixes),
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mem_docs: self.mem_docs.clone(),
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}
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}
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pub(crate) fn send_request<R: lsp_types::request::Request>(
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&mut self,
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params: R::Params,
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handler: ReqHandler,
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) {
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let request = self.req_queue.outgoing.register(R::METHOD.to_string(), params, handler);
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self.send(request.into());
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}
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pub(crate) fn complete_request(&mut self, response: lsp_server::Response) {
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let handler = self.req_queue.outgoing.complete(response.id.clone());
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handler(self, response)
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}
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pub(crate) fn send_notification<N: lsp_types::notification::Notification>(
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&mut self,
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params: N::Params,
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) {
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let not = lsp_server::Notification::new(N::METHOD.to_string(), params);
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self.send(not.into());
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}
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pub(crate) fn register_request(
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&mut self,
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request: &lsp_server::Request,
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request_received: Instant,
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) {
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self.req_queue
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.incoming
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.register(request.id.clone(), (request.method.clone(), request_received));
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}
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pub(crate) fn respond(&mut self, response: lsp_server::Response) {
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if let Some((method, start)) = self.req_queue.incoming.complete(response.id.clone()) {
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let duration = start.elapsed();
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log::info!("handled req#{} in {:?}", response.id, duration);
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let metrics = RequestMetrics { id: response.id.clone(), method, duration };
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self.latest_requests.write().record(metrics);
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self.send(response.into());
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}
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}
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pub(crate) fn cancel(&mut self, request_id: lsp_server::RequestId) {
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if let Some(response) = self.req_queue.incoming.cancel(request_id) {
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self.send(response.into());
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}
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}
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fn send(&mut self, message: lsp_server::Message) {
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self.sender.send(message).unwrap()
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}
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}
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impl Drop for GlobalState {
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fn drop(&mut self) {
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self.analysis_host.request_cancellation()
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}
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}
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impl GlobalStateSnapshot {
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pub(crate) fn url_to_file_id(&self, url: &Url) -> Result<FileId> {
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url_to_file_id(&self.vfs.read().0, url)
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}
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pub(crate) fn file_id_to_url(&self, id: FileId) -> Url {
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file_id_to_url(&self.vfs.read().0, id)
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}
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pub(crate) fn file_line_endings(&self, id: FileId) -> LineEndings {
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self.vfs.read().1[&id]
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}
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pub(crate) fn url_file_version(&self, url: &Url) -> Option<i64> {
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let path = from_proto::vfs_path(&url).ok()?;
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self.mem_docs.get(&path)?.version
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}
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pub(crate) fn anchored_path(&self, file_id: FileId, path: &str) -> Url {
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let mut base = self.vfs.read().0.file_path(file_id);
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base.pop();
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let path = base.join(path).unwrap();
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let path = path.as_path().unwrap();
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url_from_abs_path(&path)
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}
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pub(crate) fn cargo_target_for_crate_root(
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&self,
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crate_id: CrateId,
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) -> Option<(&CargoWorkspace, Target)> {
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let file_id = self.analysis.crate_root(crate_id).ok()?;
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let path = self.vfs.read().0.file_path(file_id);
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let path = path.as_path()?;
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self.workspaces.iter().find_map(|ws| match ws {
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ProjectWorkspace::Cargo { cargo, .. } => {
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cargo.target_by_root(&path).map(|it| (cargo, it))
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}
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ProjectWorkspace::Json { .. } => None,
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})
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}
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}
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pub(crate) fn file_id_to_url(vfs: &vfs::Vfs, id: FileId) -> Url {
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let path = vfs.file_path(id);
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let path = path.as_path().unwrap();
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url_from_abs_path(&path)
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}
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pub(crate) fn url_to_file_id(vfs: &vfs::Vfs, url: &Url) -> Result<FileId> {
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let path = from_proto::vfs_path(url)?;
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let res = vfs.file_id(&path).ok_or_else(|| format!("file not found: {}", path))?;
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Ok(res)
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}
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