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, AppContext, Task};
20use highlight_map::HighlightMap;
21use lazy_static::lazy_static;
22use lsp::CodeActionKind;
23use parking_lot::{Mutex, RwLock};
24use postage::watch;
25use regex::Regex;
26use serde::{de, Deserialize, Deserializer};
27use serde_json::Value;
28use std::{
29 any::Any,
30 borrow::Cow,
31 cell::RefCell,
32 ffi::OsString,
33 fmt::Debug,
34 hash::Hash,
35 mem,
36 ops::Range,
37 path::{Path, PathBuf},
38 str,
39 sync::{
40 atomic::{AtomicUsize, Ordering::SeqCst},
41 Arc,
42 },
43};
44use syntax_map::SyntaxSnapshot;
45use theme::{SyntaxTheme, Theme};
46use tree_sitter::{self, Query};
47use unicase::UniCase;
48use util::http::HttpClient;
49use util::{merge_json_value_into, post_inc, ResultExt, TryFutureExt as _, UnwrapFuture};
50
51#[cfg(any(test, feature = "test-support"))]
52use futures::channel::mpsc;
53
54pub use buffer::Operation;
55pub use buffer::*;
56pub use diagnostic_set::DiagnosticEntry;
57pub use outline::{Outline, OutlineItem};
58pub use tree_sitter::{Parser, Tree};
59
60thread_local! {
61 static PARSER: RefCell<Parser> = RefCell::new(Parser::new());
62}
63
64lazy_static! {
65 pub static ref NEXT_GRAMMAR_ID: AtomicUsize = Default::default();
66 pub static ref PLAIN_TEXT: Arc<Language> = Arc::new(Language::new(
67 LanguageConfig {
68 name: "Plain Text".into(),
69 ..Default::default()
70 },
71 None,
72 ));
73}
74
75pub trait ToLspPosition {
76 fn to_lsp_position(self) -> lsp::Position;
77}
78
79#[derive(Clone, Debug, PartialEq, Eq, Hash)]
80pub struct LanguageServerName(pub Arc<str>);
81
82#[derive(Debug, Clone, Deserialize)]
83pub struct LanguageServerBinary {
84 pub path: PathBuf,
85 pub arguments: Vec<OsString>,
86}
87
88/// Represents a Language Server, with certain cached sync properties.
89/// Uses [`LspAdapter`] under the hood, but calls all 'static' methods
90/// once at startup, and caches the results.
91pub struct CachedLspAdapter {
92 pub name: LanguageServerName,
93 pub initialization_options: Option<Value>,
94 pub disk_based_diagnostic_sources: Vec<String>,
95 pub disk_based_diagnostics_progress_token: Option<String>,
96 pub language_ids: HashMap<String, String>,
97 pub adapter: Arc<dyn LspAdapter>,
98}
99
100impl CachedLspAdapter {
101 pub async fn new(adapter: Arc<dyn LspAdapter>) -> Arc<Self> {
102 let name = adapter.name().await;
103 let initialization_options = adapter.initialization_options().await;
104 let disk_based_diagnostic_sources = adapter.disk_based_diagnostic_sources().await;
105 let disk_based_diagnostics_progress_token =
106 adapter.disk_based_diagnostics_progress_token().await;
107 let language_ids = adapter.language_ids().await;
108
109 Arc::new(CachedLspAdapter {
110 name,
111 initialization_options,
112 disk_based_diagnostic_sources,
113 disk_based_diagnostics_progress_token,
114 language_ids,
115 adapter,
116 })
117 }
118
119 pub async fn fetch_latest_server_version(
120 &self,
121 http: Arc<dyn HttpClient>,
122 ) -> Result<Box<dyn 'static + Send + Any>> {
123 self.adapter.fetch_latest_server_version(http).await
124 }
125
126 pub async fn fetch_server_binary(
127 &self,
128 version: Box<dyn 'static + Send + Any>,
129 http: Arc<dyn HttpClient>,
130 container_dir: PathBuf,
131 ) -> Result<LanguageServerBinary> {
132 self.adapter
133 .fetch_server_binary(version, http, container_dir)
134 .await
135 }
136
137 pub async fn cached_server_binary(
138 &self,
139 container_dir: PathBuf,
140 ) -> Option<LanguageServerBinary> {
141 self.adapter.cached_server_binary(container_dir).await
142 }
143
144 pub fn code_action_kinds(&self) -> Option<Vec<CodeActionKind>> {
145 self.adapter.code_action_kinds()
146 }
147
148 pub fn workspace_configuration(
149 &self,
150 cx: &mut AppContext,
151 ) -> Option<BoxFuture<'static, Value>> {
152 self.adapter.workspace_configuration(cx)
153 }
154
155 pub async fn process_diagnostics(&self, params: &mut lsp::PublishDiagnosticsParams) {
156 self.adapter.process_diagnostics(params).await
157 }
158
159 pub async fn process_completion(&self, completion_item: &mut lsp::CompletionItem) {
160 self.adapter.process_completion(completion_item).await
161 }
162
163 pub async fn label_for_completion(
164 &self,
165 completion_item: &lsp::CompletionItem,
166 language: &Arc<Language>,
167 ) -> Option<CodeLabel> {
168 self.adapter
169 .label_for_completion(completion_item, language)
170 .await
171 }
172
173 pub async fn label_for_symbol(
174 &self,
175 name: &str,
176 kind: lsp::SymbolKind,
177 language: &Arc<Language>,
178 ) -> Option<CodeLabel> {
179 self.adapter.label_for_symbol(name, kind, language).await
180 }
181}
182
183#[async_trait]
184pub trait LspAdapter: 'static + Send + Sync {
185 async fn name(&self) -> LanguageServerName;
186
187 async fn fetch_latest_server_version(
188 &self,
189 http: Arc<dyn HttpClient>,
190 ) -> Result<Box<dyn 'static + Send + Any>>;
191
192 async fn fetch_server_binary(
193 &self,
194 version: Box<dyn 'static + Send + Any>,
195 http: Arc<dyn HttpClient>,
196 container_dir: PathBuf,
197 ) -> Result<LanguageServerBinary>;
198
199 async fn cached_server_binary(&self, container_dir: PathBuf) -> Option<LanguageServerBinary>;
200
201 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
202
203 async fn process_completion(&self, _: &mut lsp::CompletionItem) {}
204
205 async fn label_for_completion(
206 &self,
207 _: &lsp::CompletionItem,
208 _: &Arc<Language>,
209 ) -> Option<CodeLabel> {
210 None
211 }
212
213 async fn label_for_symbol(
214 &self,
215 _: &str,
216 _: lsp::SymbolKind,
217 _: &Arc<Language>,
218 ) -> Option<CodeLabel> {
219 None
220 }
221
222 async fn initialization_options(&self) -> Option<Value> {
223 None
224 }
225
226 fn workspace_configuration(&self, _: &mut AppContext) -> Option<BoxFuture<'static, Value>> {
227 None
228 }
229
230 fn code_action_kinds(&self) -> Option<Vec<CodeActionKind>> {
231 Some(vec![
232 CodeActionKind::EMPTY,
233 CodeActionKind::QUICKFIX,
234 CodeActionKind::REFACTOR,
235 CodeActionKind::REFACTOR_EXTRACT,
236 CodeActionKind::SOURCE,
237 ])
238 }
239
240 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
241 Default::default()
242 }
243
244 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
245 None
246 }
247
248 async fn language_ids(&self) -> HashMap<String, String> {
249 Default::default()
250 }
251}
252
253#[derive(Clone, Debug, PartialEq, Eq)]
254pub struct CodeLabel {
255 pub text: String,
256 pub runs: Vec<(Range<usize>, HighlightId)>,
257 pub filter_range: Range<usize>,
258}
259
260#[derive(Clone, Deserialize)]
261pub struct LanguageConfig {
262 pub name: Arc<str>,
263 pub path_suffixes: Vec<String>,
264 pub brackets: BracketPairConfig,
265 #[serde(default, deserialize_with = "deserialize_regex")]
266 pub first_line_pattern: Option<Regex>,
267 #[serde(default = "auto_indent_using_last_non_empty_line_default")]
268 pub auto_indent_using_last_non_empty_line: bool,
269 #[serde(default, deserialize_with = "deserialize_regex")]
270 pub increase_indent_pattern: Option<Regex>,
271 #[serde(default, deserialize_with = "deserialize_regex")]
272 pub decrease_indent_pattern: Option<Regex>,
273 #[serde(default)]
274 pub autoclose_before: String,
275 #[serde(default)]
276 pub line_comment: Option<Arc<str>>,
277 #[serde(default)]
278 pub block_comment: Option<(Arc<str>, Arc<str>)>,
279 #[serde(default)]
280 pub overrides: HashMap<String, LanguageConfigOverride>,
281}
282
283#[derive(Debug, Default)]
284pub struct LanguageQueries {
285 pub highlights: Option<Cow<'static, str>>,
286 pub brackets: Option<Cow<'static, str>>,
287 pub indents: Option<Cow<'static, str>>,
288 pub outline: Option<Cow<'static, str>>,
289 pub injections: Option<Cow<'static, str>>,
290 pub overrides: Option<Cow<'static, str>>,
291}
292
293#[derive(Clone, Debug)]
294pub struct LanguageScope {
295 language: Arc<Language>,
296 override_id: Option<u32>,
297}
298
299#[derive(Clone, Deserialize, Default, Debug)]
300pub struct LanguageConfigOverride {
301 #[serde(default)]
302 pub line_comment: Override<Arc<str>>,
303 #[serde(default)]
304 pub block_comment: Override<(Arc<str>, Arc<str>)>,
305 #[serde(skip_deserializing)]
306 pub disabled_bracket_ixs: Vec<u16>,
307}
308
309#[derive(Clone, Deserialize, Debug)]
310#[serde(untagged)]
311pub enum Override<T> {
312 Remove { remove: bool },
313 Set(T),
314}
315
316impl<T> Default for Override<T> {
317 fn default() -> Self {
318 Override::Remove { remove: false }
319 }
320}
321
322impl<T> Override<T> {
323 fn as_option<'a>(this: Option<&'a Self>, original: Option<&'a T>) -> Option<&'a T> {
324 match this {
325 Some(Self::Set(value)) => Some(value),
326 Some(Self::Remove { remove: true }) => None,
327 Some(Self::Remove { remove: false }) | None => original,
328 }
329 }
330}
331
332impl Default for LanguageConfig {
333 fn default() -> Self {
334 Self {
335 name: "".into(),
336 path_suffixes: Default::default(),
337 brackets: Default::default(),
338 auto_indent_using_last_non_empty_line: auto_indent_using_last_non_empty_line_default(),
339 first_line_pattern: Default::default(),
340 increase_indent_pattern: Default::default(),
341 decrease_indent_pattern: Default::default(),
342 autoclose_before: Default::default(),
343 line_comment: Default::default(),
344 block_comment: Default::default(),
345 overrides: Default::default(),
346 }
347 }
348}
349
350fn auto_indent_using_last_non_empty_line_default() -> bool {
351 true
352}
353
354fn deserialize_regex<'de, D: Deserializer<'de>>(d: D) -> Result<Option<Regex>, D::Error> {
355 let source = Option::<String>::deserialize(d)?;
356 if let Some(source) = source {
357 Ok(Some(regex::Regex::new(&source).map_err(de::Error::custom)?))
358 } else {
359 Ok(None)
360 }
361}
362
363#[cfg(any(test, feature = "test-support"))]
364pub struct FakeLspAdapter {
365 pub name: &'static str,
366 pub capabilities: lsp::ServerCapabilities,
367 pub initializer: Option<Box<dyn 'static + Send + Sync + Fn(&mut lsp::FakeLanguageServer)>>,
368 pub disk_based_diagnostics_progress_token: Option<String>,
369 pub disk_based_diagnostics_sources: Vec<String>,
370}
371
372#[derive(Clone, Debug, Default)]
373pub struct BracketPairConfig {
374 pub pairs: Vec<BracketPair>,
375 pub disabled_scopes_by_bracket_ix: Vec<Vec<String>>,
376}
377
378impl<'de> Deserialize<'de> for BracketPairConfig {
379 fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
380 where
381 D: Deserializer<'de>,
382 {
383 #[derive(Deserialize)]
384 pub struct Entry {
385 #[serde(flatten)]
386 pub bracket_pair: BracketPair,
387 #[serde(default)]
388 pub not_in: Vec<String>,
389 }
390
391 let result = Vec::<Entry>::deserialize(deserializer)?;
392 let mut brackets = Vec::with_capacity(result.len());
393 let mut disabled_scopes_by_bracket_ix = Vec::with_capacity(result.len());
394 for entry in result {
395 brackets.push(entry.bracket_pair);
396 disabled_scopes_by_bracket_ix.push(entry.not_in);
397 }
398
399 Ok(BracketPairConfig {
400 pairs: brackets,
401 disabled_scopes_by_bracket_ix,
402 })
403 }
404}
405
406#[derive(Clone, Debug, Default, Deserialize, PartialEq)]
407pub struct BracketPair {
408 pub start: String,
409 pub end: String,
410 pub close: bool,
411 pub newline: bool,
412}
413
414pub struct Language {
415 pub(crate) config: LanguageConfig,
416 pub(crate) grammar: Option<Arc<Grammar>>,
417 pub(crate) adapter: Option<Arc<CachedLspAdapter>>,
418
419 #[cfg(any(test, feature = "test-support"))]
420 fake_adapter: Option<(
421 mpsc::UnboundedSender<lsp::FakeLanguageServer>,
422 Arc<FakeLspAdapter>,
423 )>,
424}
425
426pub struct Grammar {
427 id: usize,
428 pub(crate) ts_language: tree_sitter::Language,
429 pub(crate) error_query: Query,
430 pub(crate) highlights_query: Option<Query>,
431 pub(crate) brackets_config: Option<BracketConfig>,
432 pub(crate) indents_config: Option<IndentConfig>,
433 pub(crate) outline_config: Option<OutlineConfig>,
434 pub(crate) injection_config: Option<InjectionConfig>,
435 pub(crate) override_config: Option<OverrideConfig>,
436 pub(crate) highlight_map: Mutex<HighlightMap>,
437}
438
439struct IndentConfig {
440 query: Query,
441 indent_capture_ix: u32,
442 start_capture_ix: Option<u32>,
443 end_capture_ix: Option<u32>,
444 outdent_capture_ix: Option<u32>,
445}
446
447struct OutlineConfig {
448 query: Query,
449 item_capture_ix: u32,
450 name_capture_ix: u32,
451 context_capture_ix: Option<u32>,
452}
453
454struct InjectionConfig {
455 query: Query,
456 content_capture_ix: u32,
457 language_capture_ix: Option<u32>,
458 patterns: Vec<InjectionPatternConfig>,
459}
460
461struct OverrideConfig {
462 query: Query,
463 values: HashMap<u32, (String, LanguageConfigOverride)>,
464}
465
466#[derive(Default, Clone)]
467struct InjectionPatternConfig {
468 language: Option<Box<str>>,
469 combined: bool,
470}
471
472struct BracketConfig {
473 query: Query,
474 open_capture_ix: u32,
475 close_capture_ix: u32,
476}
477
478#[derive(Clone)]
479pub enum LanguageServerBinaryStatus {
480 CheckingForUpdate,
481 Downloading,
482 Downloaded,
483 Cached,
484 Failed { error: String },
485}
486
487type AvailableLanguageId = usize;
488
489#[derive(Clone)]
490struct AvailableLanguage {
491 id: AvailableLanguageId,
492 path: &'static str,
493 config: LanguageConfig,
494 grammar: tree_sitter::Language,
495 lsp_adapter: Option<Arc<dyn LspAdapter>>,
496 get_queries: fn(&str) -> LanguageQueries,
497}
498
499pub struct LanguageRegistry {
500 state: RwLock<LanguageRegistryState>,
501 language_server_download_dir: Option<Arc<Path>>,
502 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
503 lsp_binary_statuses_rx: async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)>,
504 login_shell_env_loaded: Shared<Task<()>>,
505 #[allow(clippy::type_complexity)]
506 lsp_binary_paths: Mutex<
507 HashMap<
508 LanguageServerName,
509 Shared<BoxFuture<'static, Result<LanguageServerBinary, Arc<anyhow::Error>>>>,
510 >,
511 >,
512 executor: Option<Arc<Background>>,
513}
514
515struct LanguageRegistryState {
516 languages: Vec<Arc<Language>>,
517 available_languages: Vec<AvailableLanguage>,
518 next_available_language_id: AvailableLanguageId,
519 loading_languages: HashMap<AvailableLanguageId, Vec<oneshot::Sender<Result<Arc<Language>>>>>,
520 subscription: (watch::Sender<()>, watch::Receiver<()>),
521 theme: Option<Arc<Theme>>,
522 version: usize,
523}
524
525impl LanguageRegistry {
526 pub fn new(login_shell_env_loaded: Task<()>) -> Self {
527 let (lsp_binary_statuses_tx, lsp_binary_statuses_rx) = async_broadcast::broadcast(16);
528 Self {
529 state: RwLock::new(LanguageRegistryState {
530 languages: vec![PLAIN_TEXT.clone()],
531 available_languages: Default::default(),
532 next_available_language_id: 0,
533 loading_languages: Default::default(),
534 subscription: watch::channel(),
535 theme: Default::default(),
536 version: 0,
537 }),
538 language_server_download_dir: None,
539 lsp_binary_statuses_tx,
540 lsp_binary_statuses_rx,
541 login_shell_env_loaded: login_shell_env_loaded.shared(),
542 lsp_binary_paths: Default::default(),
543 executor: None,
544 }
545 }
546
547 #[cfg(any(test, feature = "test-support"))]
548 pub fn test() -> Self {
549 Self::new(Task::ready(()))
550 }
551
552 pub fn set_executor(&mut self, executor: Arc<Background>) {
553 self.executor = Some(executor);
554 }
555
556 pub fn register(
557 &self,
558 path: &'static str,
559 config: LanguageConfig,
560 grammar: tree_sitter::Language,
561 lsp_adapter: Option<Arc<dyn LspAdapter>>,
562 get_queries: fn(&str) -> LanguageQueries,
563 ) {
564 let state = &mut *self.state.write();
565 state.available_languages.push(AvailableLanguage {
566 id: post_inc(&mut state.next_available_language_id),
567 path,
568 config,
569 grammar,
570 lsp_adapter,
571 get_queries,
572 });
573 }
574
575 pub fn language_names(&self) -> Vec<String> {
576 let state = self.state.read();
577 let mut result = state
578 .available_languages
579 .iter()
580 .map(|l| l.config.name.to_string())
581 .chain(state.languages.iter().map(|l| l.config.name.to_string()))
582 .collect::<Vec<_>>();
583 result.sort_unstable_by_key(|language_name| language_name.to_lowercase());
584 result
585 }
586
587 pub fn workspace_configuration(&self, cx: &mut AppContext) -> Task<serde_json::Value> {
588 let lsp_adapters = {
589 let state = self.state.read();
590 state
591 .available_languages
592 .iter()
593 .filter_map(|l| l.lsp_adapter.clone())
594 .chain(
595 state
596 .languages
597 .iter()
598 .filter_map(|l| l.adapter.as_ref().map(|a| a.adapter.clone())),
599 )
600 .collect::<Vec<_>>()
601 };
602
603 let mut language_configs = Vec::new();
604 for adapter in &lsp_adapters {
605 if let Some(language_config) = adapter.workspace_configuration(cx) {
606 language_configs.push(language_config);
607 }
608 }
609
610 cx.background().spawn(async move {
611 let mut config = serde_json::json!({});
612 let language_configs = futures::future::join_all(language_configs).await;
613 for language_config in language_configs {
614 merge_json_value_into(language_config, &mut config);
615 }
616 config
617 })
618 }
619
620 pub fn add(&self, language: Arc<Language>) {
621 self.state.write().add(language);
622 }
623
624 pub fn subscribe(&self) -> watch::Receiver<()> {
625 self.state.read().subscription.1.clone()
626 }
627
628 pub fn version(&self) -> usize {
629 self.state.read().version
630 }
631
632 pub fn set_theme(&self, theme: Arc<Theme>) {
633 let mut state = self.state.write();
634 state.theme = Some(theme.clone());
635 for language in &state.languages {
636 language.set_theme(&theme.editor.syntax);
637 }
638 }
639
640 pub fn set_language_server_download_dir(&mut self, path: impl Into<Arc<Path>>) {
641 self.language_server_download_dir = Some(path.into());
642 }
643
644 pub fn language_for_name(
645 self: &Arc<Self>,
646 name: &str,
647 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
648 let name = UniCase::new(name);
649 self.get_or_load_language(|config| UniCase::new(config.name.as_ref()) == name)
650 }
651
652 pub fn language_for_name_or_extension(
653 self: &Arc<Self>,
654 string: &str,
655 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
656 let string = UniCase::new(string);
657 self.get_or_load_language(|config| {
658 UniCase::new(config.name.as_ref()) == string
659 || config
660 .path_suffixes
661 .iter()
662 .any(|suffix| UniCase::new(suffix) == string)
663 })
664 }
665
666 pub fn language_for_file(
667 self: &Arc<Self>,
668 path: impl AsRef<Path>,
669 content: Option<&Rope>,
670 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
671 let path = path.as_ref();
672 let filename = path.file_name().and_then(|name| name.to_str());
673 let extension = path.extension().and_then(|name| name.to_str());
674 let path_suffixes = [extension, filename];
675 self.get_or_load_language(|config| {
676 let path_matches = config
677 .path_suffixes
678 .iter()
679 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())));
680 let content_matches = content.zip(config.first_line_pattern.as_ref()).map_or(
681 false,
682 |(content, pattern)| {
683 let end = content.clip_point(Point::new(0, 256), Bias::Left);
684 let end = content.point_to_offset(end);
685 let text = content.chunks_in_range(0..end).collect::<String>();
686 pattern.is_match(&text)
687 },
688 );
689 path_matches || content_matches
690 })
691 }
692
693 fn get_or_load_language(
694 self: &Arc<Self>,
695 callback: impl Fn(&LanguageConfig) -> bool,
696 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
697 let (tx, rx) = oneshot::channel();
698
699 let mut state = self.state.write();
700 if let Some(language) = state
701 .languages
702 .iter()
703 .find(|language| callback(&language.config))
704 {
705 let _ = tx.send(Ok(language.clone()));
706 } else if let Some(executor) = self.executor.clone() {
707 if let Some(language) = state
708 .available_languages
709 .iter()
710 .find(|l| callback(&l.config))
711 .cloned()
712 {
713 let txs = state
714 .loading_languages
715 .entry(language.id)
716 .or_insert_with(|| {
717 let this = self.clone();
718 executor
719 .spawn(async move {
720 let id = language.id;
721 let queries = (language.get_queries)(&language.path);
722 let language =
723 Language::new(language.config, Some(language.grammar))
724 .with_lsp_adapter(language.lsp_adapter)
725 .await;
726 let name = language.name();
727 match language.with_queries(queries) {
728 Ok(language) => {
729 let language = Arc::new(language);
730 let mut state = this.state.write();
731 state.add(language.clone());
732 state
733 .available_languages
734 .retain(|language| language.id != id);
735 if let Some(mut txs) = state.loading_languages.remove(&id) {
736 for tx in txs.drain(..) {
737 let _ = tx.send(Ok(language.clone()));
738 }
739 }
740 }
741 Err(err) => {
742 let mut state = this.state.write();
743 state
744 .available_languages
745 .retain(|language| language.id != id);
746 if let Some(mut txs) = state.loading_languages.remove(&id) {
747 for tx in txs.drain(..) {
748 let _ = tx.send(Err(anyhow!(
749 "failed to load language {}: {}",
750 name,
751 err
752 )));
753 }
754 }
755 }
756 };
757 })
758 .detach();
759
760 Vec::new()
761 });
762 txs.push(tx);
763 } else {
764 let _ = tx.send(Err(anyhow!("language not found")));
765 }
766 } else {
767 let _ = tx.send(Err(anyhow!("executor does not exist")));
768 }
769
770 rx.unwrap()
771 }
772
773 pub fn to_vec(&self) -> Vec<Arc<Language>> {
774 self.state.read().languages.iter().cloned().collect()
775 }
776
777 pub fn start_language_server(
778 self: &Arc<Self>,
779 server_id: usize,
780 language: Arc<Language>,
781 root_path: Arc<Path>,
782 http_client: Arc<dyn HttpClient>,
783 cx: &mut AppContext,
784 ) -> Option<Task<Result<lsp::LanguageServer>>> {
785 #[cfg(any(test, feature = "test-support"))]
786 if language.fake_adapter.is_some() {
787 let language = language;
788 return Some(cx.spawn(|cx| async move {
789 let (servers_tx, fake_adapter) = language.fake_adapter.as_ref().unwrap();
790 let (server, mut fake_server) = lsp::LanguageServer::fake(
791 fake_adapter.name.to_string(),
792 fake_adapter.capabilities.clone(),
793 cx.clone(),
794 );
795
796 if let Some(initializer) = &fake_adapter.initializer {
797 initializer(&mut fake_server);
798 }
799
800 let servers_tx = servers_tx.clone();
801 cx.background()
802 .spawn(async move {
803 if fake_server
804 .try_receive_notification::<lsp::notification::Initialized>()
805 .await
806 .is_some()
807 {
808 servers_tx.unbounded_send(fake_server).ok();
809 }
810 })
811 .detach();
812 Ok(server)
813 }));
814 }
815
816 let download_dir = self
817 .language_server_download_dir
818 .clone()
819 .ok_or_else(|| anyhow!("language server download directory has not been assigned"))
820 .log_err()?;
821
822 let this = self.clone();
823 let adapter = language.adapter.clone()?;
824 let lsp_binary_statuses = self.lsp_binary_statuses_tx.clone();
825 let login_shell_env_loaded = self.login_shell_env_loaded.clone();
826
827 Some(cx.spawn(|cx| async move {
828 login_shell_env_loaded.await;
829
830 let mut lock = this.lsp_binary_paths.lock();
831 let entry = lock
832 .entry(adapter.name.clone())
833 .or_insert_with(|| {
834 get_binary(
835 adapter.clone(),
836 language.clone(),
837 http_client,
838 download_dir,
839 lsp_binary_statuses,
840 )
841 .map_err(Arc::new)
842 .boxed()
843 .shared()
844 })
845 .clone();
846 drop(lock);
847 let binary = entry.clone().map_err(|e| anyhow!(e)).await?;
848
849 let server = lsp::LanguageServer::new(
850 server_id,
851 &binary.path,
852 &binary.arguments,
853 &root_path,
854 adapter.code_action_kinds(),
855 cx,
856 )?;
857
858 Ok(server)
859 }))
860 }
861
862 pub fn language_server_binary_statuses(
863 &self,
864 ) -> async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)> {
865 self.lsp_binary_statuses_rx.clone()
866 }
867}
868
869impl LanguageRegistryState {
870 fn add(&mut self, language: Arc<Language>) {
871 if let Some(theme) = self.theme.as_ref() {
872 language.set_theme(&theme.editor.syntax);
873 }
874 self.languages.push(language);
875 self.version += 1;
876 *self.subscription.0.borrow_mut() = ();
877 }
878}
879
880#[cfg(any(test, feature = "test-support"))]
881impl Default for LanguageRegistry {
882 fn default() -> Self {
883 Self::test()
884 }
885}
886
887async fn get_binary(
888 adapter: Arc<CachedLspAdapter>,
889 language: Arc<Language>,
890 http_client: Arc<dyn HttpClient>,
891 download_dir: Arc<Path>,
892 statuses: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
893) -> Result<LanguageServerBinary> {
894 let container_dir = download_dir.join(adapter.name.0.as_ref());
895 if !container_dir.exists() {
896 smol::fs::create_dir_all(&container_dir)
897 .await
898 .context("failed to create container directory")?;
899 }
900
901 let binary = fetch_latest_binary(
902 adapter.clone(),
903 language.clone(),
904 http_client,
905 &container_dir,
906 statuses.clone(),
907 )
908 .await;
909
910 if let Err(error) = binary.as_ref() {
911 if let Some(cached) = adapter.cached_server_binary(container_dir).await {
912 statuses
913 .broadcast((language.clone(), LanguageServerBinaryStatus::Cached))
914 .await?;
915 return Ok(cached);
916 } else {
917 statuses
918 .broadcast((
919 language.clone(),
920 LanguageServerBinaryStatus::Failed {
921 error: format!("{:?}", error),
922 },
923 ))
924 .await?;
925 }
926 }
927 binary
928}
929
930async fn fetch_latest_binary(
931 adapter: Arc<CachedLspAdapter>,
932 language: Arc<Language>,
933 http_client: Arc<dyn HttpClient>,
934 container_dir: &Path,
935 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
936) -> Result<LanguageServerBinary> {
937 let container_dir: Arc<Path> = container_dir.into();
938 lsp_binary_statuses_tx
939 .broadcast((
940 language.clone(),
941 LanguageServerBinaryStatus::CheckingForUpdate,
942 ))
943 .await?;
944 let version_info = adapter
945 .fetch_latest_server_version(http_client.clone())
946 .await?;
947 lsp_binary_statuses_tx
948 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloading))
949 .await?;
950 let binary = adapter
951 .fetch_server_binary(version_info, http_client, container_dir.to_path_buf())
952 .await?;
953 lsp_binary_statuses_tx
954 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloaded))
955 .await?;
956 Ok(binary)
957}
958
959impl Language {
960 pub fn new(config: LanguageConfig, ts_language: Option<tree_sitter::Language>) -> Self {
961 Self {
962 config,
963 grammar: ts_language.map(|ts_language| {
964 Arc::new(Grammar {
965 id: NEXT_GRAMMAR_ID.fetch_add(1, SeqCst),
966 highlights_query: None,
967 brackets_config: None,
968 outline_config: None,
969 indents_config: None,
970 injection_config: None,
971 override_config: None,
972 error_query: Query::new(ts_language, "(ERROR) @error").unwrap(),
973 ts_language,
974 highlight_map: Default::default(),
975 })
976 }),
977 adapter: None,
978
979 #[cfg(any(test, feature = "test-support"))]
980 fake_adapter: None,
981 }
982 }
983
984 pub fn lsp_adapter(&self) -> Option<Arc<CachedLspAdapter>> {
985 self.adapter.clone()
986 }
987
988 pub fn id(&self) -> Option<usize> {
989 self.grammar.as_ref().map(|g| g.id)
990 }
991
992 pub fn with_queries(mut self, queries: LanguageQueries) -> Result<Self> {
993 if let Some(query) = queries.highlights {
994 self = self
995 .with_highlights_query(query.as_ref())
996 .expect("failed to evaluate highlights query");
997 }
998 if let Some(query) = queries.brackets {
999 self = self
1000 .with_brackets_query(query.as_ref())
1001 .expect("failed to load brackets query");
1002 }
1003 if let Some(query) = queries.indents {
1004 self = self
1005 .with_indents_query(query.as_ref())
1006 .expect("failed to load indents query");
1007 }
1008 if let Some(query) = queries.outline {
1009 self = self
1010 .with_outline_query(query.as_ref())
1011 .expect("failed to load outline query");
1012 }
1013 if let Some(query) = queries.injections {
1014 self = self
1015 .with_injection_query(query.as_ref())
1016 .expect("failed to load injection query");
1017 }
1018 if let Some(query) = queries.overrides {
1019 self = self
1020 .with_override_query(query.as_ref())
1021 .expect("failed to load override query");
1022 }
1023 Ok(self)
1024 }
1025 pub fn with_highlights_query(mut self, source: &str) -> Result<Self> {
1026 let grammar = self.grammar_mut();
1027 grammar.highlights_query = Some(Query::new(grammar.ts_language, source)?);
1028 Ok(self)
1029 }
1030
1031 pub fn with_outline_query(mut self, source: &str) -> Result<Self> {
1032 let grammar = self.grammar_mut();
1033 let query = Query::new(grammar.ts_language, source)?;
1034 let mut item_capture_ix = None;
1035 let mut name_capture_ix = None;
1036 let mut context_capture_ix = None;
1037 get_capture_indices(
1038 &query,
1039 &mut [
1040 ("item", &mut item_capture_ix),
1041 ("name", &mut name_capture_ix),
1042 ("context", &mut context_capture_ix),
1043 ],
1044 );
1045 if let Some((item_capture_ix, name_capture_ix)) = item_capture_ix.zip(name_capture_ix) {
1046 grammar.outline_config = Some(OutlineConfig {
1047 query,
1048 item_capture_ix,
1049 name_capture_ix,
1050 context_capture_ix,
1051 });
1052 }
1053 Ok(self)
1054 }
1055
1056 pub fn with_brackets_query(mut self, source: &str) -> Result<Self> {
1057 let grammar = self.grammar_mut();
1058 let query = Query::new(grammar.ts_language, source)?;
1059 let mut open_capture_ix = None;
1060 let mut close_capture_ix = None;
1061 get_capture_indices(
1062 &query,
1063 &mut [
1064 ("open", &mut open_capture_ix),
1065 ("close", &mut close_capture_ix),
1066 ],
1067 );
1068 if let Some((open_capture_ix, close_capture_ix)) = open_capture_ix.zip(close_capture_ix) {
1069 grammar.brackets_config = Some(BracketConfig {
1070 query,
1071 open_capture_ix,
1072 close_capture_ix,
1073 });
1074 }
1075 Ok(self)
1076 }
1077
1078 pub fn with_indents_query(mut self, source: &str) -> Result<Self> {
1079 let grammar = self.grammar_mut();
1080 let query = Query::new(grammar.ts_language, source)?;
1081 let mut indent_capture_ix = None;
1082 let mut start_capture_ix = None;
1083 let mut end_capture_ix = None;
1084 let mut outdent_capture_ix = None;
1085 get_capture_indices(
1086 &query,
1087 &mut [
1088 ("indent", &mut indent_capture_ix),
1089 ("start", &mut start_capture_ix),
1090 ("end", &mut end_capture_ix),
1091 ("outdent", &mut outdent_capture_ix),
1092 ],
1093 );
1094 if let Some(indent_capture_ix) = indent_capture_ix {
1095 grammar.indents_config = Some(IndentConfig {
1096 query,
1097 indent_capture_ix,
1098 start_capture_ix,
1099 end_capture_ix,
1100 outdent_capture_ix,
1101 });
1102 }
1103 Ok(self)
1104 }
1105
1106 pub fn with_injection_query(mut self, source: &str) -> Result<Self> {
1107 let grammar = self.grammar_mut();
1108 let query = Query::new(grammar.ts_language, source)?;
1109 let mut language_capture_ix = None;
1110 let mut content_capture_ix = None;
1111 get_capture_indices(
1112 &query,
1113 &mut [
1114 ("language", &mut language_capture_ix),
1115 ("content", &mut content_capture_ix),
1116 ],
1117 );
1118 let patterns = (0..query.pattern_count())
1119 .map(|ix| {
1120 let mut config = InjectionPatternConfig::default();
1121 for setting in query.property_settings(ix) {
1122 match setting.key.as_ref() {
1123 "language" => {
1124 config.language = setting.value.clone();
1125 }
1126 "combined" => {
1127 config.combined = true;
1128 }
1129 _ => {}
1130 }
1131 }
1132 config
1133 })
1134 .collect();
1135 if let Some(content_capture_ix) = content_capture_ix {
1136 grammar.injection_config = Some(InjectionConfig {
1137 query,
1138 language_capture_ix,
1139 content_capture_ix,
1140 patterns,
1141 });
1142 }
1143 Ok(self)
1144 }
1145
1146 pub fn with_override_query(mut self, source: &str) -> Result<Self> {
1147 let query = Query::new(self.grammar_mut().ts_language, source)?;
1148
1149 let mut override_configs_by_id = HashMap::default();
1150 for (ix, name) in query.capture_names().iter().enumerate() {
1151 if !name.starts_with('_') {
1152 let value = self.config.overrides.remove(name).unwrap_or_default();
1153 override_configs_by_id.insert(ix as u32, (name.clone(), value));
1154 }
1155 }
1156
1157 if !self.config.overrides.is_empty() {
1158 let keys = self.config.overrides.keys().collect::<Vec<_>>();
1159 Err(anyhow!(
1160 "language {:?} has overrides in config not in query: {keys:?}",
1161 self.config.name
1162 ))?;
1163 }
1164
1165 for disabled_scope_name in self
1166 .config
1167 .brackets
1168 .disabled_scopes_by_bracket_ix
1169 .iter()
1170 .flatten()
1171 {
1172 if !override_configs_by_id
1173 .values()
1174 .any(|(scope_name, _)| scope_name == disabled_scope_name)
1175 {
1176 Err(anyhow!(
1177 "language {:?} has overrides in config not in query: {disabled_scope_name:?}",
1178 self.config.name
1179 ))?;
1180 }
1181 }
1182
1183 for (name, override_config) in override_configs_by_id.values_mut() {
1184 override_config.disabled_bracket_ixs = self
1185 .config
1186 .brackets
1187 .disabled_scopes_by_bracket_ix
1188 .iter()
1189 .enumerate()
1190 .filter_map(|(ix, disabled_scope_names)| {
1191 if disabled_scope_names.contains(name) {
1192 Some(ix as u16)
1193 } else {
1194 None
1195 }
1196 })
1197 .collect();
1198 }
1199
1200 self.config.brackets.disabled_scopes_by_bracket_ix.clear();
1201 self.grammar_mut().override_config = Some(OverrideConfig {
1202 query,
1203 values: override_configs_by_id,
1204 });
1205 Ok(self)
1206 }
1207
1208 fn grammar_mut(&mut self) -> &mut Grammar {
1209 Arc::get_mut(self.grammar.as_mut().unwrap()).unwrap()
1210 }
1211
1212 pub async fn with_lsp_adapter(mut self, lsp_adapter: Option<Arc<dyn LspAdapter>>) -> Self {
1213 if let Some(adapter) = lsp_adapter {
1214 self.adapter = Some(CachedLspAdapter::new(adapter).await);
1215 }
1216 self
1217 }
1218
1219 #[cfg(any(test, feature = "test-support"))]
1220 pub async fn set_fake_lsp_adapter(
1221 &mut self,
1222 fake_lsp_adapter: Arc<FakeLspAdapter>,
1223 ) -> mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
1224 let (servers_tx, servers_rx) = mpsc::unbounded();
1225 self.fake_adapter = Some((servers_tx, fake_lsp_adapter.clone()));
1226 let adapter = CachedLspAdapter::new(Arc::new(fake_lsp_adapter)).await;
1227 self.adapter = Some(adapter);
1228 servers_rx
1229 }
1230
1231 pub fn name(&self) -> Arc<str> {
1232 self.config.name.clone()
1233 }
1234
1235 pub async fn disk_based_diagnostic_sources(&self) -> &[String] {
1236 match self.adapter.as_ref() {
1237 Some(adapter) => &adapter.disk_based_diagnostic_sources,
1238 None => &[],
1239 }
1240 }
1241
1242 pub async fn disk_based_diagnostics_progress_token(&self) -> Option<&str> {
1243 if let Some(adapter) = self.adapter.as_ref() {
1244 adapter.disk_based_diagnostics_progress_token.as_deref()
1245 } else {
1246 None
1247 }
1248 }
1249
1250 pub async fn process_diagnostics(&self, diagnostics: &mut lsp::PublishDiagnosticsParams) {
1251 if let Some(processor) = self.adapter.as_ref() {
1252 processor.process_diagnostics(diagnostics).await;
1253 }
1254 }
1255
1256 pub async fn process_completion(self: &Arc<Self>, completion: &mut lsp::CompletionItem) {
1257 if let Some(adapter) = self.adapter.as_ref() {
1258 adapter.process_completion(completion).await;
1259 }
1260 }
1261
1262 pub async fn label_for_completion(
1263 self: &Arc<Self>,
1264 completion: &lsp::CompletionItem,
1265 ) -> Option<CodeLabel> {
1266 self.adapter
1267 .as_ref()?
1268 .label_for_completion(completion, self)
1269 .await
1270 }
1271
1272 pub async fn label_for_symbol(
1273 self: &Arc<Self>,
1274 name: &str,
1275 kind: lsp::SymbolKind,
1276 ) -> Option<CodeLabel> {
1277 self.adapter
1278 .as_ref()?
1279 .label_for_symbol(name, kind, self)
1280 .await
1281 }
1282
1283 pub fn highlight_text<'a>(
1284 self: &'a Arc<Self>,
1285 text: &'a Rope,
1286 range: Range<usize>,
1287 ) -> Vec<(Range<usize>, HighlightId)> {
1288 let mut result = Vec::new();
1289 if let Some(grammar) = &self.grammar {
1290 let tree = grammar.parse_text(text, None);
1291 let captures =
1292 SyntaxSnapshot::single_tree_captures(range.clone(), text, &tree, self, |grammar| {
1293 grammar.highlights_query.as_ref()
1294 });
1295 let highlight_maps = vec![grammar.highlight_map()];
1296 let mut offset = 0;
1297 for chunk in BufferChunks::new(text, range, Some((captures, highlight_maps)), vec![]) {
1298 let end_offset = offset + chunk.text.len();
1299 if let Some(highlight_id) = chunk.syntax_highlight_id {
1300 if !highlight_id.is_default() {
1301 result.push((offset..end_offset, highlight_id));
1302 }
1303 }
1304 offset = end_offset;
1305 }
1306 }
1307 result
1308 }
1309
1310 pub fn path_suffixes(&self) -> &[String] {
1311 &self.config.path_suffixes
1312 }
1313
1314 pub fn should_autoclose_before(&self, c: char) -> bool {
1315 c.is_whitespace() || self.config.autoclose_before.contains(c)
1316 }
1317
1318 pub fn set_theme(&self, theme: &SyntaxTheme) {
1319 if let Some(grammar) = self.grammar.as_ref() {
1320 if let Some(highlights_query) = &grammar.highlights_query {
1321 *grammar.highlight_map.lock() =
1322 HighlightMap::new(highlights_query.capture_names(), theme);
1323 }
1324 }
1325 }
1326
1327 pub fn grammar(&self) -> Option<&Arc<Grammar>> {
1328 self.grammar.as_ref()
1329 }
1330}
1331
1332impl LanguageScope {
1333 pub fn line_comment_prefix(&self) -> Option<&Arc<str>> {
1334 Override::as_option(
1335 self.config_override().map(|o| &o.line_comment),
1336 self.language.config.line_comment.as_ref(),
1337 )
1338 }
1339
1340 pub fn block_comment_delimiters(&self) -> Option<(&Arc<str>, &Arc<str>)> {
1341 Override::as_option(
1342 self.config_override().map(|o| &o.block_comment),
1343 self.language.config.block_comment.as_ref(),
1344 )
1345 .map(|e| (&e.0, &e.1))
1346 }
1347
1348 pub fn brackets(&self) -> impl Iterator<Item = (&BracketPair, bool)> {
1349 let mut disabled_ids = self
1350 .config_override()
1351 .map_or(&[] as _, |o| o.disabled_bracket_ixs.as_slice());
1352 self.language
1353 .config
1354 .brackets
1355 .pairs
1356 .iter()
1357 .enumerate()
1358 .map(move |(ix, bracket)| {
1359 let mut is_enabled = true;
1360 if let Some(next_disabled_ix) = disabled_ids.first() {
1361 if ix == *next_disabled_ix as usize {
1362 disabled_ids = &disabled_ids[1..];
1363 is_enabled = false;
1364 }
1365 }
1366 (bracket, is_enabled)
1367 })
1368 }
1369
1370 pub fn should_autoclose_before(&self, c: char) -> bool {
1371 c.is_whitespace() || self.language.config.autoclose_before.contains(c)
1372 }
1373
1374 fn config_override(&self) -> Option<&LanguageConfigOverride> {
1375 let id = self.override_id?;
1376 let grammar = self.language.grammar.as_ref()?;
1377 let override_config = grammar.override_config.as_ref()?;
1378 override_config.values.get(&id).map(|e| &e.1)
1379 }
1380}
1381
1382impl Hash for Language {
1383 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
1384 self.id().hash(state)
1385 }
1386}
1387
1388impl PartialEq for Language {
1389 fn eq(&self, other: &Self) -> bool {
1390 self.id().eq(&other.id())
1391 }
1392}
1393
1394impl Eq for Language {}
1395
1396impl Debug for Language {
1397 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
1398 f.debug_struct("Language")
1399 .field("name", &self.config.name)
1400 .finish()
1401 }
1402}
1403
1404impl Grammar {
1405 pub fn id(&self) -> usize {
1406 self.id
1407 }
1408
1409 fn parse_text(&self, text: &Rope, old_tree: Option<Tree>) -> Tree {
1410 PARSER.with(|parser| {
1411 let mut parser = parser.borrow_mut();
1412 parser
1413 .set_language(self.ts_language)
1414 .expect("incompatible grammar");
1415 let mut chunks = text.chunks_in_range(0..text.len());
1416 parser
1417 .parse_with(
1418 &mut move |offset, _| {
1419 chunks.seek(offset);
1420 chunks.next().unwrap_or("").as_bytes()
1421 },
1422 old_tree.as_ref(),
1423 )
1424 .unwrap()
1425 })
1426 }
1427
1428 pub fn highlight_map(&self) -> HighlightMap {
1429 self.highlight_map.lock().clone()
1430 }
1431
1432 pub fn highlight_id_for_name(&self, name: &str) -> Option<HighlightId> {
1433 let capture_id = self
1434 .highlights_query
1435 .as_ref()?
1436 .capture_index_for_name(name)?;
1437 Some(self.highlight_map.lock().get(capture_id))
1438 }
1439}
1440
1441impl CodeLabel {
1442 pub fn plain(text: String, filter_text: Option<&str>) -> Self {
1443 let mut result = Self {
1444 runs: Vec::new(),
1445 filter_range: 0..text.len(),
1446 text,
1447 };
1448 if let Some(filter_text) = filter_text {
1449 if let Some(ix) = result.text.find(filter_text) {
1450 result.filter_range = ix..ix + filter_text.len();
1451 }
1452 }
1453 result
1454 }
1455}
1456
1457#[cfg(any(test, feature = "test-support"))]
1458impl Default for FakeLspAdapter {
1459 fn default() -> Self {
1460 Self {
1461 name: "the-fake-language-server",
1462 capabilities: lsp::LanguageServer::full_capabilities(),
1463 initializer: None,
1464 disk_based_diagnostics_progress_token: None,
1465 disk_based_diagnostics_sources: Vec::new(),
1466 }
1467 }
1468}
1469
1470#[cfg(any(test, feature = "test-support"))]
1471#[async_trait]
1472impl LspAdapter for Arc<FakeLspAdapter> {
1473 async fn name(&self) -> LanguageServerName {
1474 LanguageServerName(self.name.into())
1475 }
1476
1477 async fn fetch_latest_server_version(
1478 &self,
1479 _: Arc<dyn HttpClient>,
1480 ) -> Result<Box<dyn 'static + Send + Any>> {
1481 unreachable!();
1482 }
1483
1484 async fn fetch_server_binary(
1485 &self,
1486 _: Box<dyn 'static + Send + Any>,
1487 _: Arc<dyn HttpClient>,
1488 _: PathBuf,
1489 ) -> Result<LanguageServerBinary> {
1490 unreachable!();
1491 }
1492
1493 async fn cached_server_binary(&self, _: PathBuf) -> Option<LanguageServerBinary> {
1494 unreachable!();
1495 }
1496
1497 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
1498
1499 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
1500 self.disk_based_diagnostics_sources.clone()
1501 }
1502
1503 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
1504 self.disk_based_diagnostics_progress_token.clone()
1505 }
1506}
1507
1508fn get_capture_indices(query: &Query, captures: &mut [(&str, &mut Option<u32>)]) {
1509 for (ix, name) in query.capture_names().iter().enumerate() {
1510 for (capture_name, index) in captures.iter_mut() {
1511 if capture_name == name {
1512 **index = Some(ix as u32);
1513 break;
1514 }
1515 }
1516 }
1517}
1518
1519pub fn point_to_lsp(point: PointUtf16) -> lsp::Position {
1520 lsp::Position::new(point.row, point.column)
1521}
1522
1523pub fn point_from_lsp(point: lsp::Position) -> Unclipped<PointUtf16> {
1524 Unclipped(PointUtf16::new(point.line, point.character))
1525}
1526
1527pub fn range_to_lsp(range: Range<PointUtf16>) -> lsp::Range {
1528 lsp::Range {
1529 start: point_to_lsp(range.start),
1530 end: point_to_lsp(range.end),
1531 }
1532}
1533
1534pub fn range_from_lsp(range: lsp::Range) -> Range<Unclipped<PointUtf16>> {
1535 let mut start = point_from_lsp(range.start);
1536 let mut end = point_from_lsp(range.end);
1537 if start > end {
1538 mem::swap(&mut start, &mut end);
1539 }
1540 start..end
1541}
1542
1543#[cfg(test)]
1544mod tests {
1545 use super::*;
1546 use gpui::TestAppContext;
1547
1548 #[gpui::test(iterations = 10)]
1549 async fn test_first_line_pattern(cx: &mut TestAppContext) {
1550 let mut languages = LanguageRegistry::test();
1551 languages.set_executor(cx.background());
1552 let languages = Arc::new(languages);
1553 languages.register(
1554 "/javascript",
1555 LanguageConfig {
1556 name: "JavaScript".into(),
1557 path_suffixes: vec!["js".into()],
1558 first_line_pattern: Some(Regex::new(r"\bnode\b").unwrap()),
1559 ..Default::default()
1560 },
1561 tree_sitter_javascript::language(),
1562 None,
1563 |_| Default::default(),
1564 );
1565
1566 languages
1567 .language_for_file("the/script", None)
1568 .await
1569 .unwrap_err();
1570 languages
1571 .language_for_file("the/script", Some(&"nothing".into()))
1572 .await
1573 .unwrap_err();
1574 assert_eq!(
1575 languages
1576 .language_for_file("the/script", Some(&"#!/bin/env node".into()))
1577 .await
1578 .unwrap()
1579 .name()
1580 .as_ref(),
1581 "JavaScript"
1582 );
1583 }
1584
1585 #[gpui::test(iterations = 10)]
1586 async fn test_language_loading(cx: &mut TestAppContext) {
1587 let mut languages = LanguageRegistry::test();
1588 languages.set_executor(cx.background());
1589 let languages = Arc::new(languages);
1590 languages.register(
1591 "/JSON",
1592 LanguageConfig {
1593 name: "JSON".into(),
1594 path_suffixes: vec!["json".into()],
1595 ..Default::default()
1596 },
1597 tree_sitter_json::language(),
1598 None,
1599 |_| Default::default(),
1600 );
1601 languages.register(
1602 "/rust",
1603 LanguageConfig {
1604 name: "Rust".into(),
1605 path_suffixes: vec!["rs".into()],
1606 ..Default::default()
1607 },
1608 tree_sitter_rust::language(),
1609 None,
1610 |_| Default::default(),
1611 );
1612 assert_eq!(
1613 languages.language_names(),
1614 &[
1615 "JSON".to_string(),
1616 "Plain Text".to_string(),
1617 "Rust".to_string(),
1618 ]
1619 );
1620
1621 let rust1 = languages.language_for_name("Rust");
1622 let rust2 = languages.language_for_name("Rust");
1623
1624 // Ensure language is still listed even if it's being loaded.
1625 assert_eq!(
1626 languages.language_names(),
1627 &[
1628 "JSON".to_string(),
1629 "Plain Text".to_string(),
1630 "Rust".to_string(),
1631 ]
1632 );
1633
1634 let (rust1, rust2) = futures::join!(rust1, rust2);
1635 assert!(Arc::ptr_eq(&rust1.unwrap(), &rust2.unwrap()));
1636
1637 // Ensure language is still listed even after loading it.
1638 assert_eq!(
1639 languages.language_names(),
1640 &[
1641 "JSON".to_string(),
1642 "Plain Text".to_string(),
1643 "Rust".to_string(),
1644 ]
1645 );
1646
1647 // Loading an unknown language returns an error.
1648 assert!(languages.language_for_name("Unknown").await.is_err());
1649 }
1650}