1mod buffer;
2mod diagnostic_set;
3mod highlight_map;
4mod outline;
5pub mod proto;
6mod syntax_map;
7
8#[cfg(test)]
9mod buffer_tests;
10
11use anyhow::{anyhow, Context, Result};
12use async_trait::async_trait;
13use collections::HashMap;
14use futures::{
15 channel::oneshot,
16 future::{BoxFuture, Shared},
17 FutureExt, TryFutureExt as _,
18};
19use gpui::{executor::Background, MutableAppContext, Task};
20use highlight_map::HighlightMap;
21use lazy_static::lazy_static;
22use parking_lot::{Mutex, RwLock};
23use postage::watch;
24use regex::Regex;
25use serde::{de, Deserialize, Deserializer};
26use serde_json::Value;
27use std::{
28 any::Any,
29 borrow::Cow,
30 cell::RefCell,
31 ffi::OsString,
32 fmt::Debug,
33 hash::Hash,
34 mem,
35 ops::Range,
36 path::{Path, PathBuf},
37 str,
38 sync::{
39 atomic::{AtomicUsize, Ordering::SeqCst},
40 Arc,
41 },
42};
43use syntax_map::SyntaxSnapshot;
44use theme::{SyntaxTheme, Theme};
45use tree_sitter::{self, Query};
46use unicase::UniCase;
47use util::http::HttpClient;
48use util::{merge_json_value_into, post_inc, ResultExt, TryFutureExt as _, UnwrapFuture};
49
50#[cfg(any(test, feature = "test-support"))]
51use futures::channel::mpsc;
52
53pub use buffer::Operation;
54pub use buffer::*;
55pub use diagnostic_set::DiagnosticEntry;
56pub use outline::{Outline, OutlineItem};
57pub use tree_sitter::{Parser, Tree};
58
59thread_local! {
60 static PARSER: RefCell<Parser> = RefCell::new(Parser::new());
61}
62
63lazy_static! {
64 pub static ref NEXT_GRAMMAR_ID: AtomicUsize = Default::default();
65 pub static ref PLAIN_TEXT: Arc<Language> = Arc::new(Language::new(
66 LanguageConfig {
67 name: "Plain Text".into(),
68 ..Default::default()
69 },
70 None,
71 ));
72}
73
74pub trait ToLspPosition {
75 fn to_lsp_position(self) -> lsp::Position;
76}
77
78#[derive(Clone, Debug, PartialEq, Eq, Hash)]
79pub struct LanguageServerName(pub Arc<str>);
80
81#[derive(Debug, Clone, Deserialize)]
82pub struct LanguageServerBinary {
83 pub path: PathBuf,
84 pub arguments: Vec<OsString>,
85}
86
87/// Represents a Language Server, with certain cached sync properties.
88/// Uses [`LspAdapter`] under the hood, but calls all 'static' methods
89/// once at startup, and caches the results.
90pub struct CachedLspAdapter {
91 pub name: LanguageServerName,
92 pub initialization_options: Option<Value>,
93 pub disk_based_diagnostic_sources: Vec<String>,
94 pub disk_based_diagnostics_progress_token: Option<String>,
95 pub language_ids: HashMap<String, String>,
96 pub adapter: Arc<dyn LspAdapter>,
97}
98
99impl CachedLspAdapter {
100 pub async fn new(adapter: Arc<dyn LspAdapter>) -> Arc<Self> {
101 let name = adapter.name().await;
102 let initialization_options = adapter.initialization_options().await;
103 let disk_based_diagnostic_sources = adapter.disk_based_diagnostic_sources().await;
104 let disk_based_diagnostics_progress_token =
105 adapter.disk_based_diagnostics_progress_token().await;
106 let language_ids = adapter.language_ids().await;
107
108 Arc::new(CachedLspAdapter {
109 name,
110 initialization_options,
111 disk_based_diagnostic_sources,
112 disk_based_diagnostics_progress_token,
113 language_ids,
114 adapter,
115 })
116 }
117
118 pub async fn fetch_latest_server_version(
119 &self,
120 http: Arc<dyn HttpClient>,
121 ) -> Result<Box<dyn 'static + Send + Any>> {
122 self.adapter.fetch_latest_server_version(http).await
123 }
124
125 pub async fn fetch_server_binary(
126 &self,
127 version: Box<dyn 'static + Send + Any>,
128 http: Arc<dyn HttpClient>,
129 container_dir: PathBuf,
130 ) -> Result<LanguageServerBinary> {
131 self.adapter
132 .fetch_server_binary(version, http, container_dir)
133 .await
134 }
135
136 pub async fn cached_server_binary(
137 &self,
138 container_dir: PathBuf,
139 ) -> Option<LanguageServerBinary> {
140 self.adapter.cached_server_binary(container_dir).await
141 }
142
143 pub fn workspace_configuration(
144 &self,
145 cx: &mut MutableAppContext,
146 ) -> Option<BoxFuture<'static, Value>> {
147 self.adapter.workspace_configuration(cx)
148 }
149
150 pub async fn process_diagnostics(&self, params: &mut lsp::PublishDiagnosticsParams) {
151 self.adapter.process_diagnostics(params).await
152 }
153
154 pub async fn process_completion(&self, completion_item: &mut lsp::CompletionItem) {
155 self.adapter.process_completion(completion_item).await
156 }
157
158 pub async fn label_for_completion(
159 &self,
160 completion_item: &lsp::CompletionItem,
161 language: &Arc<Language>,
162 ) -> Option<CodeLabel> {
163 self.adapter
164 .label_for_completion(completion_item, language)
165 .await
166 }
167
168 pub async fn label_for_symbol(
169 &self,
170 name: &str,
171 kind: lsp::SymbolKind,
172 language: &Arc<Language>,
173 ) -> Option<CodeLabel> {
174 self.adapter.label_for_symbol(name, kind, language).await
175 }
176}
177
178#[async_trait]
179pub trait LspAdapter: 'static + Send + Sync {
180 async fn name(&self) -> LanguageServerName;
181
182 async fn fetch_latest_server_version(
183 &self,
184 http: Arc<dyn HttpClient>,
185 ) -> Result<Box<dyn 'static + Send + Any>>;
186
187 async fn fetch_server_binary(
188 &self,
189 version: Box<dyn 'static + Send + Any>,
190 http: Arc<dyn HttpClient>,
191 container_dir: PathBuf,
192 ) -> Result<LanguageServerBinary>;
193
194 async fn cached_server_binary(&self, container_dir: PathBuf) -> Option<LanguageServerBinary>;
195
196 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
197
198 async fn process_completion(&self, _: &mut lsp::CompletionItem) {}
199
200 async fn label_for_completion(
201 &self,
202 _: &lsp::CompletionItem,
203 _: &Arc<Language>,
204 ) -> Option<CodeLabel> {
205 None
206 }
207
208 async fn label_for_symbol(
209 &self,
210 _: &str,
211 _: lsp::SymbolKind,
212 _: &Arc<Language>,
213 ) -> Option<CodeLabel> {
214 None
215 }
216
217 async fn initialization_options(&self) -> Option<Value> {
218 None
219 }
220
221 fn workspace_configuration(
222 &self,
223 _: &mut MutableAppContext,
224 ) -> Option<BoxFuture<'static, Value>> {
225 None
226 }
227
228 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
229 Default::default()
230 }
231
232 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
233 None
234 }
235
236 async fn language_ids(&self) -> HashMap<String, String> {
237 Default::default()
238 }
239}
240
241#[derive(Clone, Debug, PartialEq, Eq)]
242pub struct CodeLabel {
243 pub text: String,
244 pub runs: Vec<(Range<usize>, HighlightId)>,
245 pub filter_range: Range<usize>,
246}
247
248#[derive(Clone, Deserialize)]
249pub struct LanguageConfig {
250 pub name: Arc<str>,
251 pub path_suffixes: Vec<String>,
252 pub brackets: BracketPairConfig,
253 #[serde(default = "auto_indent_using_last_non_empty_line_default")]
254 pub auto_indent_using_last_non_empty_line: bool,
255 #[serde(default, deserialize_with = "deserialize_regex")]
256 pub increase_indent_pattern: Option<Regex>,
257 #[serde(default, deserialize_with = "deserialize_regex")]
258 pub decrease_indent_pattern: Option<Regex>,
259 #[serde(default)]
260 pub autoclose_before: String,
261 #[serde(default)]
262 pub line_comment: Option<Arc<str>>,
263 #[serde(default)]
264 pub block_comment: Option<(Arc<str>, Arc<str>)>,
265 #[serde(default)]
266 pub overrides: HashMap<String, LanguageConfigOverride>,
267}
268
269#[derive(Debug, Default)]
270pub struct LanguageQueries {
271 pub highlights: Option<Cow<'static, str>>,
272 pub brackets: Option<Cow<'static, str>>,
273 pub indents: Option<Cow<'static, str>>,
274 pub outline: Option<Cow<'static, str>>,
275 pub injections: Option<Cow<'static, str>>,
276 pub overrides: Option<Cow<'static, str>>,
277}
278
279#[derive(Clone, Debug)]
280pub struct LanguageScope {
281 language: Arc<Language>,
282 override_id: Option<u32>,
283}
284
285#[derive(Clone, Deserialize, Default, Debug)]
286pub struct LanguageConfigOverride {
287 #[serde(default)]
288 pub line_comment: Override<Arc<str>>,
289 #[serde(default)]
290 pub block_comment: Override<(Arc<str>, Arc<str>)>,
291 #[serde(skip_deserializing)]
292 pub disabled_bracket_ixs: Vec<u16>,
293}
294
295#[derive(Clone, Deserialize, Debug)]
296#[serde(untagged)]
297pub enum Override<T> {
298 Remove { remove: bool },
299 Set(T),
300}
301
302impl<T> Default for Override<T> {
303 fn default() -> Self {
304 Override::Remove { remove: false }
305 }
306}
307
308impl<T> Override<T> {
309 fn as_option<'a>(this: Option<&'a Self>, original: Option<&'a T>) -> Option<&'a T> {
310 match this {
311 Some(Self::Set(value)) => Some(value),
312 Some(Self::Remove { remove: true }) => None,
313 Some(Self::Remove { remove: false }) | None => original,
314 }
315 }
316}
317
318impl Default for LanguageConfig {
319 fn default() -> Self {
320 Self {
321 name: "".into(),
322 path_suffixes: Default::default(),
323 brackets: Default::default(),
324 auto_indent_using_last_non_empty_line: auto_indent_using_last_non_empty_line_default(),
325 increase_indent_pattern: Default::default(),
326 decrease_indent_pattern: Default::default(),
327 autoclose_before: Default::default(),
328 line_comment: Default::default(),
329 block_comment: Default::default(),
330 overrides: Default::default(),
331 }
332 }
333}
334
335fn auto_indent_using_last_non_empty_line_default() -> bool {
336 true
337}
338
339fn deserialize_regex<'de, D: Deserializer<'de>>(d: D) -> Result<Option<Regex>, D::Error> {
340 let source = Option::<String>::deserialize(d)?;
341 if let Some(source) = source {
342 Ok(Some(regex::Regex::new(&source).map_err(de::Error::custom)?))
343 } else {
344 Ok(None)
345 }
346}
347
348#[cfg(any(test, feature = "test-support"))]
349pub struct FakeLspAdapter {
350 pub name: &'static str,
351 pub capabilities: lsp::ServerCapabilities,
352 pub initializer: Option<Box<dyn 'static + Send + Sync + Fn(&mut lsp::FakeLanguageServer)>>,
353 pub disk_based_diagnostics_progress_token: Option<String>,
354 pub disk_based_diagnostics_sources: Vec<String>,
355}
356
357#[derive(Clone, Debug, Default)]
358pub struct BracketPairConfig {
359 pub pairs: Vec<BracketPair>,
360 pub disabled_scopes_by_bracket_ix: Vec<Vec<String>>,
361}
362
363impl<'de> Deserialize<'de> for BracketPairConfig {
364 fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
365 where
366 D: Deserializer<'de>,
367 {
368 #[derive(Deserialize)]
369 pub struct Entry {
370 #[serde(flatten)]
371 pub bracket_pair: BracketPair,
372 #[serde(default)]
373 pub not_in: Vec<String>,
374 }
375
376 let result = Vec::<Entry>::deserialize(deserializer)?;
377 let mut brackets = Vec::with_capacity(result.len());
378 let mut disabled_scopes_by_bracket_ix = Vec::with_capacity(result.len());
379 for entry in result {
380 brackets.push(entry.bracket_pair);
381 disabled_scopes_by_bracket_ix.push(entry.not_in);
382 }
383
384 Ok(BracketPairConfig {
385 pairs: brackets,
386 disabled_scopes_by_bracket_ix,
387 })
388 }
389}
390
391#[derive(Clone, Debug, Default, Deserialize, PartialEq)]
392pub struct BracketPair {
393 pub start: String,
394 pub end: String,
395 pub close: bool,
396 pub newline: bool,
397}
398
399pub struct Language {
400 pub(crate) config: LanguageConfig,
401 pub(crate) grammar: Option<Arc<Grammar>>,
402 pub(crate) adapter: Option<Arc<CachedLspAdapter>>,
403
404 #[cfg(any(test, feature = "test-support"))]
405 fake_adapter: Option<(
406 mpsc::UnboundedSender<lsp::FakeLanguageServer>,
407 Arc<FakeLspAdapter>,
408 )>,
409}
410
411pub struct Grammar {
412 id: usize,
413 pub(crate) ts_language: tree_sitter::Language,
414 pub(crate) error_query: Query,
415 pub(crate) highlights_query: Option<Query>,
416 pub(crate) brackets_config: Option<BracketConfig>,
417 pub(crate) indents_config: Option<IndentConfig>,
418 pub(crate) outline_config: Option<OutlineConfig>,
419 pub(crate) injection_config: Option<InjectionConfig>,
420 pub(crate) override_config: Option<OverrideConfig>,
421 pub(crate) highlight_map: Mutex<HighlightMap>,
422}
423
424struct IndentConfig {
425 query: Query,
426 indent_capture_ix: u32,
427 start_capture_ix: Option<u32>,
428 end_capture_ix: Option<u32>,
429 outdent_capture_ix: Option<u32>,
430}
431
432struct OutlineConfig {
433 query: Query,
434 item_capture_ix: u32,
435 name_capture_ix: u32,
436 context_capture_ix: Option<u32>,
437}
438
439struct InjectionConfig {
440 query: Query,
441 content_capture_ix: u32,
442 language_capture_ix: Option<u32>,
443 patterns: Vec<InjectionPatternConfig>,
444}
445
446struct OverrideConfig {
447 query: Query,
448 values: HashMap<u32, (String, LanguageConfigOverride)>,
449}
450
451#[derive(Default, Clone)]
452struct InjectionPatternConfig {
453 language: Option<Box<str>>,
454 combined: bool,
455}
456
457struct BracketConfig {
458 query: Query,
459 open_capture_ix: u32,
460 close_capture_ix: u32,
461}
462
463#[derive(Clone)]
464pub enum LanguageServerBinaryStatus {
465 CheckingForUpdate,
466 Downloading,
467 Downloaded,
468 Cached,
469 Failed { error: String },
470}
471
472type AvailableLanguageId = usize;
473
474#[derive(Clone)]
475struct AvailableLanguage {
476 id: AvailableLanguageId,
477 path: &'static str,
478 config: LanguageConfig,
479 grammar: tree_sitter::Language,
480 lsp_adapter: Option<Arc<dyn LspAdapter>>,
481 get_queries: fn(&str) -> LanguageQueries,
482}
483
484pub struct LanguageRegistry {
485 state: RwLock<LanguageRegistryState>,
486 language_server_download_dir: Option<Arc<Path>>,
487 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
488 lsp_binary_statuses_rx: async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)>,
489 login_shell_env_loaded: Shared<Task<()>>,
490 #[allow(clippy::type_complexity)]
491 lsp_binary_paths: Mutex<
492 HashMap<
493 LanguageServerName,
494 Shared<BoxFuture<'static, Result<LanguageServerBinary, Arc<anyhow::Error>>>>,
495 >,
496 >,
497 executor: Option<Arc<Background>>,
498}
499
500struct LanguageRegistryState {
501 languages: Vec<Arc<Language>>,
502 available_languages: Vec<AvailableLanguage>,
503 next_available_language_id: AvailableLanguageId,
504 loading_languages: HashMap<AvailableLanguageId, Vec<oneshot::Sender<Result<Arc<Language>>>>>,
505 subscription: (watch::Sender<()>, watch::Receiver<()>),
506 theme: Option<Arc<Theme>>,
507 version: usize,
508}
509
510impl LanguageRegistry {
511 pub fn new(login_shell_env_loaded: Task<()>) -> Self {
512 let (lsp_binary_statuses_tx, lsp_binary_statuses_rx) = async_broadcast::broadcast(16);
513 Self {
514 state: RwLock::new(LanguageRegistryState {
515 languages: vec![PLAIN_TEXT.clone()],
516 available_languages: Default::default(),
517 next_available_language_id: 0,
518 loading_languages: Default::default(),
519 subscription: watch::channel(),
520 theme: Default::default(),
521 version: 0,
522 }),
523 language_server_download_dir: None,
524 lsp_binary_statuses_tx,
525 lsp_binary_statuses_rx,
526 login_shell_env_loaded: login_shell_env_loaded.shared(),
527 lsp_binary_paths: Default::default(),
528 executor: None,
529 }
530 }
531
532 #[cfg(any(test, feature = "test-support"))]
533 pub fn test() -> Self {
534 Self::new(Task::ready(()))
535 }
536
537 pub fn set_executor(&mut self, executor: Arc<Background>) {
538 self.executor = Some(executor);
539 }
540
541 pub fn register(
542 &self,
543 path: &'static str,
544 config: LanguageConfig,
545 grammar: tree_sitter::Language,
546 lsp_adapter: Option<Arc<dyn LspAdapter>>,
547 get_queries: fn(&str) -> LanguageQueries,
548 ) {
549 let state = &mut *self.state.write();
550 state.available_languages.push(AvailableLanguage {
551 id: post_inc(&mut state.next_available_language_id),
552 path,
553 config,
554 grammar,
555 lsp_adapter,
556 get_queries,
557 });
558 }
559
560 pub fn language_names(&self) -> Vec<String> {
561 let state = self.state.read();
562 let mut result = state
563 .available_languages
564 .iter()
565 .map(|l| l.config.name.to_string())
566 .chain(state.languages.iter().map(|l| l.config.name.to_string()))
567 .collect::<Vec<_>>();
568 result.sort_unstable_by_key(|language_name| language_name.to_lowercase());
569 result
570 }
571
572 pub fn workspace_configuration(&self, cx: &mut MutableAppContext) -> Task<serde_json::Value> {
573 let lsp_adapters = {
574 let state = self.state.read();
575 state
576 .available_languages
577 .iter()
578 .filter_map(|l| l.lsp_adapter.clone())
579 .chain(
580 state
581 .languages
582 .iter()
583 .filter_map(|l| l.adapter.as_ref().map(|a| a.adapter.clone())),
584 )
585 .collect::<Vec<_>>()
586 };
587
588 let mut language_configs = Vec::new();
589 for adapter in &lsp_adapters {
590 if let Some(language_config) = adapter.workspace_configuration(cx) {
591 language_configs.push(language_config);
592 }
593 }
594
595 cx.background().spawn(async move {
596 let mut config = serde_json::json!({});
597 let language_configs = futures::future::join_all(language_configs).await;
598 for language_config in language_configs {
599 merge_json_value_into(language_config, &mut config);
600 }
601 config
602 })
603 }
604
605 pub fn add(&self, language: Arc<Language>) {
606 self.state.write().add(language);
607 }
608
609 pub fn subscribe(&self) -> watch::Receiver<()> {
610 self.state.read().subscription.1.clone()
611 }
612
613 pub fn version(&self) -> usize {
614 self.state.read().version
615 }
616
617 pub fn set_theme(&self, theme: Arc<Theme>) {
618 let mut state = self.state.write();
619 state.theme = Some(theme.clone());
620 for language in &state.languages {
621 language.set_theme(&theme.editor.syntax);
622 }
623 }
624
625 pub fn set_language_server_download_dir(&mut self, path: impl Into<Arc<Path>>) {
626 self.language_server_download_dir = Some(path.into());
627 }
628
629 pub fn language_for_name(
630 self: &Arc<Self>,
631 name: &str,
632 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
633 let name = UniCase::new(name);
634 self.get_or_load_language(|config| UniCase::new(config.name.as_ref()) == name)
635 }
636
637 pub fn language_for_name_or_extension(
638 self: &Arc<Self>,
639 string: &str,
640 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
641 let string = UniCase::new(string);
642 self.get_or_load_language(|config| {
643 UniCase::new(config.name.as_ref()) == string
644 || config
645 .path_suffixes
646 .iter()
647 .any(|suffix| UniCase::new(suffix) == string)
648 })
649 }
650
651 pub fn language_for_path(
652 self: &Arc<Self>,
653 path: impl AsRef<Path>,
654 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
655 let path = path.as_ref();
656 let filename = path.file_name().and_then(|name| name.to_str());
657 let extension = path.extension().and_then(|name| name.to_str());
658 let path_suffixes = [extension, filename];
659 self.get_or_load_language(|config| {
660 config
661 .path_suffixes
662 .iter()
663 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())))
664 })
665 }
666
667 fn get_or_load_language(
668 self: &Arc<Self>,
669 callback: impl Fn(&LanguageConfig) -> bool,
670 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
671 let (tx, rx) = oneshot::channel();
672
673 let mut state = self.state.write();
674 if let Some(language) = state
675 .languages
676 .iter()
677 .find(|language| callback(&language.config))
678 {
679 let _ = tx.send(Ok(language.clone()));
680 } else if let Some(executor) = self.executor.clone() {
681 if let Some(language) = state
682 .available_languages
683 .iter()
684 .find(|l| callback(&l.config))
685 .cloned()
686 {
687 let txs = state
688 .loading_languages
689 .entry(language.id)
690 .or_insert_with(|| {
691 let this = self.clone();
692 executor
693 .spawn(async move {
694 let id = language.id;
695 let queries = (language.get_queries)(&language.path);
696 let language =
697 Language::new(language.config, Some(language.grammar))
698 .with_lsp_adapter(language.lsp_adapter)
699 .await;
700 let name = language.name();
701 match language.with_queries(queries) {
702 Ok(language) => {
703 let language = Arc::new(language);
704 let mut state = this.state.write();
705 state.add(language.clone());
706 state
707 .available_languages
708 .retain(|language| language.id != id);
709 if let Some(mut txs) = state.loading_languages.remove(&id) {
710 for tx in txs.drain(..) {
711 let _ = tx.send(Ok(language.clone()));
712 }
713 }
714 }
715 Err(err) => {
716 let mut state = this.state.write();
717 state
718 .available_languages
719 .retain(|language| language.id != id);
720 if let Some(mut txs) = state.loading_languages.remove(&id) {
721 for tx in txs.drain(..) {
722 let _ = tx.send(Err(anyhow!(
723 "failed to load language {}: {}",
724 name,
725 err
726 )));
727 }
728 }
729 }
730 };
731 })
732 .detach();
733
734 Vec::new()
735 });
736 txs.push(tx);
737 } else {
738 let _ = tx.send(Err(anyhow!("language not found")));
739 }
740 } else {
741 let _ = tx.send(Err(anyhow!("executor does not exist")));
742 }
743
744 rx.unwrap()
745 }
746
747 pub fn to_vec(&self) -> Vec<Arc<Language>> {
748 self.state.read().languages.iter().cloned().collect()
749 }
750
751 pub fn start_language_server(
752 self: &Arc<Self>,
753 server_id: usize,
754 language: Arc<Language>,
755 root_path: Arc<Path>,
756 http_client: Arc<dyn HttpClient>,
757 cx: &mut MutableAppContext,
758 ) -> Option<Task<Result<lsp::LanguageServer>>> {
759 #[cfg(any(test, feature = "test-support"))]
760 if language.fake_adapter.is_some() {
761 let language = language;
762 return Some(cx.spawn(|cx| async move {
763 let (servers_tx, fake_adapter) = language.fake_adapter.as_ref().unwrap();
764 let (server, mut fake_server) = lsp::LanguageServer::fake(
765 fake_adapter.name.to_string(),
766 fake_adapter.capabilities.clone(),
767 cx.clone(),
768 );
769
770 if let Some(initializer) = &fake_adapter.initializer {
771 initializer(&mut fake_server);
772 }
773
774 let servers_tx = servers_tx.clone();
775 cx.background()
776 .spawn(async move {
777 if fake_server
778 .try_receive_notification::<lsp::notification::Initialized>()
779 .await
780 .is_some()
781 {
782 servers_tx.unbounded_send(fake_server).ok();
783 }
784 })
785 .detach();
786 Ok(server)
787 }));
788 }
789
790 let download_dir = self
791 .language_server_download_dir
792 .clone()
793 .ok_or_else(|| anyhow!("language server download directory has not been assigned"))
794 .log_err()?;
795
796 let this = self.clone();
797 let adapter = language.adapter.clone()?;
798 let lsp_binary_statuses = self.lsp_binary_statuses_tx.clone();
799 let login_shell_env_loaded = self.login_shell_env_loaded.clone();
800
801 Some(cx.spawn(|cx| async move {
802 login_shell_env_loaded.await;
803
804 let mut lock = this.lsp_binary_paths.lock();
805 let entry = lock
806 .entry(adapter.name.clone())
807 .or_insert_with(|| {
808 get_binary(
809 adapter.clone(),
810 language.clone(),
811 http_client,
812 download_dir,
813 lsp_binary_statuses,
814 )
815 .map_err(Arc::new)
816 .boxed()
817 .shared()
818 })
819 .clone();
820 drop(lock);
821 let binary = entry.clone().map_err(|e| anyhow!(e)).await?;
822
823 let server = lsp::LanguageServer::new(
824 server_id,
825 &binary.path,
826 &binary.arguments,
827 &root_path,
828 cx,
829 )?;
830
831 Ok(server)
832 }))
833 }
834
835 pub fn language_server_binary_statuses(
836 &self,
837 ) -> async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)> {
838 self.lsp_binary_statuses_rx.clone()
839 }
840}
841
842impl LanguageRegistryState {
843 fn add(&mut self, language: Arc<Language>) {
844 if let Some(theme) = self.theme.as_ref() {
845 language.set_theme(&theme.editor.syntax);
846 }
847 self.languages.push(language);
848 self.version += 1;
849 *self.subscription.0.borrow_mut() = ();
850 }
851}
852
853#[cfg(any(test, feature = "test-support"))]
854impl Default for LanguageRegistry {
855 fn default() -> Self {
856 Self::test()
857 }
858}
859
860async fn get_binary(
861 adapter: Arc<CachedLspAdapter>,
862 language: Arc<Language>,
863 http_client: Arc<dyn HttpClient>,
864 download_dir: Arc<Path>,
865 statuses: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
866) -> Result<LanguageServerBinary> {
867 let container_dir = download_dir.join(adapter.name.0.as_ref());
868 if !container_dir.exists() {
869 smol::fs::create_dir_all(&container_dir)
870 .await
871 .context("failed to create container directory")?;
872 }
873
874 let binary = fetch_latest_binary(
875 adapter.clone(),
876 language.clone(),
877 http_client,
878 &container_dir,
879 statuses.clone(),
880 )
881 .await;
882
883 if let Err(error) = binary.as_ref() {
884 if let Some(cached) = adapter.cached_server_binary(container_dir).await {
885 statuses
886 .broadcast((language.clone(), LanguageServerBinaryStatus::Cached))
887 .await?;
888 return Ok(cached);
889 } else {
890 statuses
891 .broadcast((
892 language.clone(),
893 LanguageServerBinaryStatus::Failed {
894 error: format!("{:?}", error),
895 },
896 ))
897 .await?;
898 }
899 }
900 binary
901}
902
903async fn fetch_latest_binary(
904 adapter: Arc<CachedLspAdapter>,
905 language: Arc<Language>,
906 http_client: Arc<dyn HttpClient>,
907 container_dir: &Path,
908 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
909) -> Result<LanguageServerBinary> {
910 let container_dir: Arc<Path> = container_dir.into();
911 lsp_binary_statuses_tx
912 .broadcast((
913 language.clone(),
914 LanguageServerBinaryStatus::CheckingForUpdate,
915 ))
916 .await?;
917 let version_info = adapter
918 .fetch_latest_server_version(http_client.clone())
919 .await?;
920 lsp_binary_statuses_tx
921 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloading))
922 .await?;
923 let binary = adapter
924 .fetch_server_binary(version_info, http_client, container_dir.to_path_buf())
925 .await?;
926 lsp_binary_statuses_tx
927 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloaded))
928 .await?;
929 Ok(binary)
930}
931
932impl Language {
933 pub fn new(config: LanguageConfig, ts_language: Option<tree_sitter::Language>) -> Self {
934 Self {
935 config,
936 grammar: ts_language.map(|ts_language| {
937 Arc::new(Grammar {
938 id: NEXT_GRAMMAR_ID.fetch_add(1, SeqCst),
939 highlights_query: None,
940 brackets_config: None,
941 outline_config: None,
942 indents_config: None,
943 injection_config: None,
944 override_config: None,
945 error_query: Query::new(ts_language, "(ERROR) @error").unwrap(),
946 ts_language,
947 highlight_map: Default::default(),
948 })
949 }),
950 adapter: None,
951
952 #[cfg(any(test, feature = "test-support"))]
953 fake_adapter: None,
954 }
955 }
956
957 pub fn lsp_adapter(&self) -> Option<Arc<CachedLspAdapter>> {
958 self.adapter.clone()
959 }
960
961 pub fn id(&self) -> Option<usize> {
962 self.grammar.as_ref().map(|g| g.id)
963 }
964
965 pub fn with_queries(mut self, queries: LanguageQueries) -> Result<Self> {
966 if let Some(query) = queries.highlights {
967 self = self
968 .with_highlights_query(query.as_ref())
969 .expect("failed to evaluate highlights query");
970 }
971 if let Some(query) = queries.brackets {
972 self = self
973 .with_brackets_query(query.as_ref())
974 .expect("failed to load brackets query");
975 }
976 if let Some(query) = queries.indents {
977 self = self
978 .with_indents_query(query.as_ref())
979 .expect("failed to load indents query");
980 }
981 if let Some(query) = queries.outline {
982 self = self
983 .with_outline_query(query.as_ref())
984 .expect("failed to load outline query");
985 }
986 if let Some(query) = queries.injections {
987 self = self
988 .with_injection_query(query.as_ref())
989 .expect("failed to load injection query");
990 }
991 if let Some(query) = queries.overrides {
992 self = self
993 .with_override_query(query.as_ref())
994 .expect("failed to load override query");
995 }
996 Ok(self)
997 }
998 pub fn with_highlights_query(mut self, source: &str) -> Result<Self> {
999 let grammar = self.grammar_mut();
1000 grammar.highlights_query = Some(Query::new(grammar.ts_language, source)?);
1001 Ok(self)
1002 }
1003
1004 pub fn with_outline_query(mut self, source: &str) -> Result<Self> {
1005 let grammar = self.grammar_mut();
1006 let query = Query::new(grammar.ts_language, source)?;
1007 let mut item_capture_ix = None;
1008 let mut name_capture_ix = None;
1009 let mut context_capture_ix = None;
1010 get_capture_indices(
1011 &query,
1012 &mut [
1013 ("item", &mut item_capture_ix),
1014 ("name", &mut name_capture_ix),
1015 ("context", &mut context_capture_ix),
1016 ],
1017 );
1018 if let Some((item_capture_ix, name_capture_ix)) = item_capture_ix.zip(name_capture_ix) {
1019 grammar.outline_config = Some(OutlineConfig {
1020 query,
1021 item_capture_ix,
1022 name_capture_ix,
1023 context_capture_ix,
1024 });
1025 }
1026 Ok(self)
1027 }
1028
1029 pub fn with_brackets_query(mut self, source: &str) -> Result<Self> {
1030 let grammar = self.grammar_mut();
1031 let query = Query::new(grammar.ts_language, source)?;
1032 let mut open_capture_ix = None;
1033 let mut close_capture_ix = None;
1034 get_capture_indices(
1035 &query,
1036 &mut [
1037 ("open", &mut open_capture_ix),
1038 ("close", &mut close_capture_ix),
1039 ],
1040 );
1041 if let Some((open_capture_ix, close_capture_ix)) = open_capture_ix.zip(close_capture_ix) {
1042 grammar.brackets_config = Some(BracketConfig {
1043 query,
1044 open_capture_ix,
1045 close_capture_ix,
1046 });
1047 }
1048 Ok(self)
1049 }
1050
1051 pub fn with_indents_query(mut self, source: &str) -> Result<Self> {
1052 let grammar = self.grammar_mut();
1053 let query = Query::new(grammar.ts_language, source)?;
1054 let mut indent_capture_ix = None;
1055 let mut start_capture_ix = None;
1056 let mut end_capture_ix = None;
1057 let mut outdent_capture_ix = None;
1058 get_capture_indices(
1059 &query,
1060 &mut [
1061 ("indent", &mut indent_capture_ix),
1062 ("start", &mut start_capture_ix),
1063 ("end", &mut end_capture_ix),
1064 ("outdent", &mut outdent_capture_ix),
1065 ],
1066 );
1067 if let Some(indent_capture_ix) = indent_capture_ix {
1068 grammar.indents_config = Some(IndentConfig {
1069 query,
1070 indent_capture_ix,
1071 start_capture_ix,
1072 end_capture_ix,
1073 outdent_capture_ix,
1074 });
1075 }
1076 Ok(self)
1077 }
1078
1079 pub fn with_injection_query(mut self, source: &str) -> Result<Self> {
1080 let grammar = self.grammar_mut();
1081 let query = Query::new(grammar.ts_language, source)?;
1082 let mut language_capture_ix = None;
1083 let mut content_capture_ix = None;
1084 get_capture_indices(
1085 &query,
1086 &mut [
1087 ("language", &mut language_capture_ix),
1088 ("content", &mut content_capture_ix),
1089 ],
1090 );
1091 let patterns = (0..query.pattern_count())
1092 .map(|ix| {
1093 let mut config = InjectionPatternConfig::default();
1094 for setting in query.property_settings(ix) {
1095 match setting.key.as_ref() {
1096 "language" => {
1097 config.language = setting.value.clone();
1098 }
1099 "combined" => {
1100 config.combined = true;
1101 }
1102 _ => {}
1103 }
1104 }
1105 config
1106 })
1107 .collect();
1108 if let Some(content_capture_ix) = content_capture_ix {
1109 grammar.injection_config = Some(InjectionConfig {
1110 query,
1111 language_capture_ix,
1112 content_capture_ix,
1113 patterns,
1114 });
1115 }
1116 Ok(self)
1117 }
1118
1119 pub fn with_override_query(mut self, source: &str) -> Result<Self> {
1120 let query = Query::new(self.grammar_mut().ts_language, source)?;
1121
1122 let mut override_configs_by_id = HashMap::default();
1123 for (ix, name) in query.capture_names().iter().enumerate() {
1124 if !name.starts_with('_') {
1125 let value = self.config.overrides.remove(name).unwrap_or_default();
1126 override_configs_by_id.insert(ix as u32, (name.clone(), value));
1127 }
1128 }
1129
1130 if !self.config.overrides.is_empty() {
1131 let keys = self.config.overrides.keys().collect::<Vec<_>>();
1132 Err(anyhow!(
1133 "language {:?} has overrides in config not in query: {keys:?}",
1134 self.config.name
1135 ))?;
1136 }
1137
1138 for disabled_scope_name in self
1139 .config
1140 .brackets
1141 .disabled_scopes_by_bracket_ix
1142 .iter()
1143 .flatten()
1144 {
1145 if !override_configs_by_id
1146 .values()
1147 .any(|(scope_name, _)| scope_name == disabled_scope_name)
1148 {
1149 Err(anyhow!(
1150 "language {:?} has overrides in config not in query: {disabled_scope_name:?}",
1151 self.config.name
1152 ))?;
1153 }
1154 }
1155
1156 for (name, override_config) in override_configs_by_id.values_mut() {
1157 override_config.disabled_bracket_ixs = self
1158 .config
1159 .brackets
1160 .disabled_scopes_by_bracket_ix
1161 .iter()
1162 .enumerate()
1163 .filter_map(|(ix, disabled_scope_names)| {
1164 if disabled_scope_names.contains(name) {
1165 Some(ix as u16)
1166 } else {
1167 None
1168 }
1169 })
1170 .collect();
1171 }
1172
1173 self.config.brackets.disabled_scopes_by_bracket_ix.clear();
1174 self.grammar_mut().override_config = Some(OverrideConfig {
1175 query,
1176 values: override_configs_by_id,
1177 });
1178 Ok(self)
1179 }
1180
1181 fn grammar_mut(&mut self) -> &mut Grammar {
1182 Arc::get_mut(self.grammar.as_mut().unwrap()).unwrap()
1183 }
1184
1185 pub async fn with_lsp_adapter(mut self, lsp_adapter: Option<Arc<dyn LspAdapter>>) -> Self {
1186 if let Some(adapter) = lsp_adapter {
1187 self.adapter = Some(CachedLspAdapter::new(adapter).await);
1188 }
1189 self
1190 }
1191
1192 #[cfg(any(test, feature = "test-support"))]
1193 pub async fn set_fake_lsp_adapter(
1194 &mut self,
1195 fake_lsp_adapter: Arc<FakeLspAdapter>,
1196 ) -> mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
1197 let (servers_tx, servers_rx) = mpsc::unbounded();
1198 self.fake_adapter = Some((servers_tx, fake_lsp_adapter.clone()));
1199 let adapter = CachedLspAdapter::new(Arc::new(fake_lsp_adapter)).await;
1200 self.adapter = Some(adapter);
1201 servers_rx
1202 }
1203
1204 pub fn name(&self) -> Arc<str> {
1205 self.config.name.clone()
1206 }
1207
1208 pub async fn disk_based_diagnostic_sources(&self) -> &[String] {
1209 match self.adapter.as_ref() {
1210 Some(adapter) => &adapter.disk_based_diagnostic_sources,
1211 None => &[],
1212 }
1213 }
1214
1215 pub async fn disk_based_diagnostics_progress_token(&self) -> Option<&str> {
1216 if let Some(adapter) = self.adapter.as_ref() {
1217 adapter.disk_based_diagnostics_progress_token.as_deref()
1218 } else {
1219 None
1220 }
1221 }
1222
1223 pub async fn process_diagnostics(&self, diagnostics: &mut lsp::PublishDiagnosticsParams) {
1224 if let Some(processor) = self.adapter.as_ref() {
1225 processor.process_diagnostics(diagnostics).await;
1226 }
1227 }
1228
1229 pub async fn process_completion(self: &Arc<Self>, completion: &mut lsp::CompletionItem) {
1230 if let Some(adapter) = self.adapter.as_ref() {
1231 adapter.process_completion(completion).await;
1232 }
1233 }
1234
1235 pub async fn label_for_completion(
1236 self: &Arc<Self>,
1237 completion: &lsp::CompletionItem,
1238 ) -> Option<CodeLabel> {
1239 self.adapter
1240 .as_ref()?
1241 .label_for_completion(completion, self)
1242 .await
1243 }
1244
1245 pub async fn label_for_symbol(
1246 self: &Arc<Self>,
1247 name: &str,
1248 kind: lsp::SymbolKind,
1249 ) -> Option<CodeLabel> {
1250 self.adapter
1251 .as_ref()?
1252 .label_for_symbol(name, kind, self)
1253 .await
1254 }
1255
1256 pub fn highlight_text<'a>(
1257 self: &'a Arc<Self>,
1258 text: &'a Rope,
1259 range: Range<usize>,
1260 ) -> Vec<(Range<usize>, HighlightId)> {
1261 let mut result = Vec::new();
1262 if let Some(grammar) = &self.grammar {
1263 let tree = grammar.parse_text(text, None);
1264 let captures =
1265 SyntaxSnapshot::single_tree_captures(range.clone(), text, &tree, self, |grammar| {
1266 grammar.highlights_query.as_ref()
1267 });
1268 let highlight_maps = vec![grammar.highlight_map()];
1269 let mut offset = 0;
1270 for chunk in BufferChunks::new(text, range, Some((captures, highlight_maps)), vec![]) {
1271 let end_offset = offset + chunk.text.len();
1272 if let Some(highlight_id) = chunk.syntax_highlight_id {
1273 if !highlight_id.is_default() {
1274 result.push((offset..end_offset, highlight_id));
1275 }
1276 }
1277 offset = end_offset;
1278 }
1279 }
1280 result
1281 }
1282
1283 pub fn path_suffixes(&self) -> &[String] {
1284 &self.config.path_suffixes
1285 }
1286
1287 pub fn should_autoclose_before(&self, c: char) -> bool {
1288 c.is_whitespace() || self.config.autoclose_before.contains(c)
1289 }
1290
1291 pub fn set_theme(&self, theme: &SyntaxTheme) {
1292 if let Some(grammar) = self.grammar.as_ref() {
1293 if let Some(highlights_query) = &grammar.highlights_query {
1294 *grammar.highlight_map.lock() =
1295 HighlightMap::new(highlights_query.capture_names(), theme);
1296 }
1297 }
1298 }
1299
1300 pub fn grammar(&self) -> Option<&Arc<Grammar>> {
1301 self.grammar.as_ref()
1302 }
1303}
1304
1305impl LanguageScope {
1306 pub fn line_comment_prefix(&self) -> Option<&Arc<str>> {
1307 Override::as_option(
1308 self.config_override().map(|o| &o.line_comment),
1309 self.language.config.line_comment.as_ref(),
1310 )
1311 }
1312
1313 pub fn block_comment_delimiters(&self) -> Option<(&Arc<str>, &Arc<str>)> {
1314 Override::as_option(
1315 self.config_override().map(|o| &o.block_comment),
1316 self.language.config.block_comment.as_ref(),
1317 )
1318 .map(|e| (&e.0, &e.1))
1319 }
1320
1321 pub fn brackets(&self) -> impl Iterator<Item = (&BracketPair, bool)> {
1322 let mut disabled_ids = self
1323 .config_override()
1324 .map_or(&[] as _, |o| o.disabled_bracket_ixs.as_slice());
1325 self.language
1326 .config
1327 .brackets
1328 .pairs
1329 .iter()
1330 .enumerate()
1331 .map(move |(ix, bracket)| {
1332 let mut is_enabled = true;
1333 if let Some(next_disabled_ix) = disabled_ids.first() {
1334 if ix == *next_disabled_ix as usize {
1335 disabled_ids = &disabled_ids[1..];
1336 is_enabled = false;
1337 }
1338 }
1339 (bracket, is_enabled)
1340 })
1341 }
1342
1343 pub fn should_autoclose_before(&self, c: char) -> bool {
1344 c.is_whitespace() || self.language.config.autoclose_before.contains(c)
1345 }
1346
1347 fn config_override(&self) -> Option<&LanguageConfigOverride> {
1348 let id = self.override_id?;
1349 let grammar = self.language.grammar.as_ref()?;
1350 let override_config = grammar.override_config.as_ref()?;
1351 override_config.values.get(&id).map(|e| &e.1)
1352 }
1353}
1354
1355impl Hash for Language {
1356 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
1357 self.id().hash(state)
1358 }
1359}
1360
1361impl PartialEq for Language {
1362 fn eq(&self, other: &Self) -> bool {
1363 self.id().eq(&other.id())
1364 }
1365}
1366
1367impl Eq for Language {}
1368
1369impl Debug for Language {
1370 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
1371 f.debug_struct("Language")
1372 .field("name", &self.config.name)
1373 .finish()
1374 }
1375}
1376
1377impl Grammar {
1378 pub fn id(&self) -> usize {
1379 self.id
1380 }
1381
1382 fn parse_text(&self, text: &Rope, old_tree: Option<Tree>) -> Tree {
1383 PARSER.with(|parser| {
1384 let mut parser = parser.borrow_mut();
1385 parser
1386 .set_language(self.ts_language)
1387 .expect("incompatible grammar");
1388 let mut chunks = text.chunks_in_range(0..text.len());
1389 parser
1390 .parse_with(
1391 &mut move |offset, _| {
1392 chunks.seek(offset);
1393 chunks.next().unwrap_or("").as_bytes()
1394 },
1395 old_tree.as_ref(),
1396 )
1397 .unwrap()
1398 })
1399 }
1400
1401 pub fn highlight_map(&self) -> HighlightMap {
1402 self.highlight_map.lock().clone()
1403 }
1404
1405 pub fn highlight_id_for_name(&self, name: &str) -> Option<HighlightId> {
1406 let capture_id = self
1407 .highlights_query
1408 .as_ref()?
1409 .capture_index_for_name(name)?;
1410 Some(self.highlight_map.lock().get(capture_id))
1411 }
1412}
1413
1414impl CodeLabel {
1415 pub fn plain(text: String, filter_text: Option<&str>) -> Self {
1416 let mut result = Self {
1417 runs: Vec::new(),
1418 filter_range: 0..text.len(),
1419 text,
1420 };
1421 if let Some(filter_text) = filter_text {
1422 if let Some(ix) = result.text.find(filter_text) {
1423 result.filter_range = ix..ix + filter_text.len();
1424 }
1425 }
1426 result
1427 }
1428}
1429
1430#[cfg(any(test, feature = "test-support"))]
1431impl Default for FakeLspAdapter {
1432 fn default() -> Self {
1433 Self {
1434 name: "the-fake-language-server",
1435 capabilities: lsp::LanguageServer::full_capabilities(),
1436 initializer: None,
1437 disk_based_diagnostics_progress_token: None,
1438 disk_based_diagnostics_sources: Vec::new(),
1439 }
1440 }
1441}
1442
1443#[cfg(any(test, feature = "test-support"))]
1444#[async_trait]
1445impl LspAdapter for Arc<FakeLspAdapter> {
1446 async fn name(&self) -> LanguageServerName {
1447 LanguageServerName(self.name.into())
1448 }
1449
1450 async fn fetch_latest_server_version(
1451 &self,
1452 _: Arc<dyn HttpClient>,
1453 ) -> Result<Box<dyn 'static + Send + Any>> {
1454 unreachable!();
1455 }
1456
1457 async fn fetch_server_binary(
1458 &self,
1459 _: Box<dyn 'static + Send + Any>,
1460 _: Arc<dyn HttpClient>,
1461 _: PathBuf,
1462 ) -> Result<LanguageServerBinary> {
1463 unreachable!();
1464 }
1465
1466 async fn cached_server_binary(&self, _: PathBuf) -> Option<LanguageServerBinary> {
1467 unreachable!();
1468 }
1469
1470 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
1471
1472 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
1473 self.disk_based_diagnostics_sources.clone()
1474 }
1475
1476 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
1477 self.disk_based_diagnostics_progress_token.clone()
1478 }
1479}
1480
1481fn get_capture_indices(query: &Query, captures: &mut [(&str, &mut Option<u32>)]) {
1482 for (ix, name) in query.capture_names().iter().enumerate() {
1483 for (capture_name, index) in captures.iter_mut() {
1484 if capture_name == name {
1485 **index = Some(ix as u32);
1486 break;
1487 }
1488 }
1489 }
1490}
1491
1492pub fn point_to_lsp(point: PointUtf16) -> lsp::Position {
1493 lsp::Position::new(point.row, point.column)
1494}
1495
1496pub fn point_from_lsp(point: lsp::Position) -> Unclipped<PointUtf16> {
1497 Unclipped(PointUtf16::new(point.line, point.character))
1498}
1499
1500pub fn range_to_lsp(range: Range<PointUtf16>) -> lsp::Range {
1501 lsp::Range {
1502 start: point_to_lsp(range.start),
1503 end: point_to_lsp(range.end),
1504 }
1505}
1506
1507pub fn range_from_lsp(range: lsp::Range) -> Range<Unclipped<PointUtf16>> {
1508 let mut start = point_from_lsp(range.start);
1509 let mut end = point_from_lsp(range.end);
1510 if start > end {
1511 mem::swap(&mut start, &mut end);
1512 }
1513 start..end
1514}
1515
1516#[cfg(test)]
1517mod tests {
1518 use gpui::TestAppContext;
1519
1520 use super::*;
1521
1522 #[gpui::test(iterations = 10)]
1523 async fn test_language_loading(cx: &mut TestAppContext) {
1524 let mut languages = LanguageRegistry::test();
1525 languages.set_executor(cx.background());
1526 let languages = Arc::new(languages);
1527 languages.register(
1528 "/JSON",
1529 LanguageConfig {
1530 name: "JSON".into(),
1531 path_suffixes: vec!["json".into()],
1532 ..Default::default()
1533 },
1534 tree_sitter_json::language(),
1535 None,
1536 |_| Default::default(),
1537 );
1538 languages.register(
1539 "/rust",
1540 LanguageConfig {
1541 name: "Rust".into(),
1542 path_suffixes: vec!["rs".into()],
1543 ..Default::default()
1544 },
1545 tree_sitter_rust::language(),
1546 None,
1547 |_| Default::default(),
1548 );
1549 assert_eq!(
1550 languages.language_names(),
1551 &[
1552 "JSON".to_string(),
1553 "Plain Text".to_string(),
1554 "Rust".to_string(),
1555 ]
1556 );
1557
1558 let rust1 = languages.language_for_name("Rust");
1559 let rust2 = languages.language_for_name("Rust");
1560
1561 // Ensure language is still listed even if it's being loaded.
1562 assert_eq!(
1563 languages.language_names(),
1564 &[
1565 "JSON".to_string(),
1566 "Plain Text".to_string(),
1567 "Rust".to_string(),
1568 ]
1569 );
1570
1571 let (rust1, rust2) = futures::join!(rust1, rust2);
1572 assert!(Arc::ptr_eq(&rust1.unwrap(), &rust2.unwrap()));
1573
1574 // Ensure language is still listed even after loading it.
1575 assert_eq!(
1576 languages.language_names(),
1577 &[
1578 "JSON".to_string(),
1579 "Plain Text".to_string(),
1580 "Rust".to_string(),
1581 ]
1582 );
1583
1584 // Loading an unknown language returns an error.
1585 assert!(languages.language_for_name("Unknown").await.is_err());
1586 }
1587}