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 lsp::LanguageServerId;
58pub use outline::{Outline, OutlineItem};
59pub use tree_sitter::{Parser, Tree};
60
61thread_local! {
62 static PARSER: RefCell<Parser> = RefCell::new(Parser::new());
63}
64
65lazy_static! {
66 pub static ref NEXT_GRAMMAR_ID: AtomicUsize = Default::default();
67 pub static ref PLAIN_TEXT: Arc<Language> = Arc::new(Language::new(
68 LanguageConfig {
69 name: "Plain Text".into(),
70 ..Default::default()
71 },
72 None,
73 ));
74}
75
76pub trait ToLspPosition {
77 fn to_lsp_position(self) -> lsp::Position;
78}
79
80#[derive(Clone, Debug, PartialEq, Eq, Hash)]
81pub struct LanguageServerName(pub Arc<str>);
82
83#[derive(Debug, Clone, Deserialize)]
84pub struct LanguageServerBinary {
85 pub path: PathBuf,
86 pub arguments: Vec<OsString>,
87}
88
89/// Represents a Language Server, with certain cached sync properties.
90/// Uses [`LspAdapter`] under the hood, but calls all 'static' methods
91/// once at startup, and caches the results.
92pub struct CachedLspAdapter {
93 pub name: LanguageServerName,
94 pub initialization_options: Option<Value>,
95 pub disk_based_diagnostic_sources: Vec<String>,
96 pub disk_based_diagnostics_progress_token: Option<String>,
97 pub language_ids: HashMap<String, String>,
98 pub adapter: Arc<dyn LspAdapter>,
99}
100
101impl CachedLspAdapter {
102 pub async fn new(adapter: Arc<dyn LspAdapter>) -> Arc<Self> {
103 let name = adapter.name().await;
104 let initialization_options = adapter.initialization_options().await;
105 let disk_based_diagnostic_sources = adapter.disk_based_diagnostic_sources().await;
106 let disk_based_diagnostics_progress_token =
107 adapter.disk_based_diagnostics_progress_token().await;
108 let language_ids = adapter.language_ids().await;
109
110 Arc::new(CachedLspAdapter {
111 name,
112 initialization_options,
113 disk_based_diagnostic_sources,
114 disk_based_diagnostics_progress_token,
115 language_ids,
116 adapter,
117 })
118 }
119
120 pub async fn fetch_latest_server_version(
121 &self,
122 http: Arc<dyn HttpClient>,
123 ) -> Result<Box<dyn 'static + Send + Any>> {
124 self.adapter.fetch_latest_server_version(http).await
125 }
126
127 pub async fn fetch_server_binary(
128 &self,
129 version: Box<dyn 'static + Send + Any>,
130 http: Arc<dyn HttpClient>,
131 container_dir: PathBuf,
132 ) -> Result<LanguageServerBinary> {
133 self.adapter
134 .fetch_server_binary(version, http, container_dir)
135 .await
136 }
137
138 pub async fn cached_server_binary(
139 &self,
140 container_dir: PathBuf,
141 ) -> Option<LanguageServerBinary> {
142 self.adapter.cached_server_binary(container_dir).await
143 }
144
145 pub fn code_action_kinds(&self) -> Option<Vec<CodeActionKind>> {
146 self.adapter.code_action_kinds()
147 }
148
149 pub fn workspace_configuration(
150 &self,
151 cx: &mut AppContext,
152 ) -> Option<BoxFuture<'static, Value>> {
153 self.adapter.workspace_configuration(cx)
154 }
155
156 pub async fn process_diagnostics(&self, params: &mut lsp::PublishDiagnosticsParams) {
157 self.adapter.process_diagnostics(params).await
158 }
159
160 pub async fn process_completion(&self, completion_item: &mut lsp::CompletionItem) {
161 self.adapter.process_completion(completion_item).await
162 }
163
164 pub async fn label_for_completion(
165 &self,
166 completion_item: &lsp::CompletionItem,
167 language: &Arc<Language>,
168 ) -> Option<CodeLabel> {
169 self.adapter
170 .label_for_completion(completion_item, language)
171 .await
172 }
173
174 pub async fn label_for_symbol(
175 &self,
176 name: &str,
177 kind: lsp::SymbolKind,
178 language: &Arc<Language>,
179 ) -> Option<CodeLabel> {
180 self.adapter.label_for_symbol(name, kind, language).await
181 }
182}
183
184#[async_trait]
185pub trait LspAdapter: 'static + Send + Sync {
186 async fn name(&self) -> LanguageServerName;
187
188 async fn fetch_latest_server_version(
189 &self,
190 http: Arc<dyn HttpClient>,
191 ) -> Result<Box<dyn 'static + Send + Any>>;
192
193 async fn fetch_server_binary(
194 &self,
195 version: Box<dyn 'static + Send + Any>,
196 http: Arc<dyn HttpClient>,
197 container_dir: PathBuf,
198 ) -> Result<LanguageServerBinary>;
199
200 async fn cached_server_binary(&self, container_dir: PathBuf) -> Option<LanguageServerBinary>;
201
202 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
203
204 async fn process_completion(&self, _: &mut lsp::CompletionItem) {}
205
206 async fn label_for_completion(
207 &self,
208 _: &lsp::CompletionItem,
209 _: &Arc<Language>,
210 ) -> Option<CodeLabel> {
211 None
212 }
213
214 async fn label_for_symbol(
215 &self,
216 _: &str,
217 _: lsp::SymbolKind,
218 _: &Arc<Language>,
219 ) -> Option<CodeLabel> {
220 None
221 }
222
223 async fn initialization_options(&self) -> Option<Value> {
224 None
225 }
226
227 fn workspace_configuration(&self, _: &mut AppContext) -> Option<BoxFuture<'static, Value>> {
228 None
229 }
230
231 fn code_action_kinds(&self) -> Option<Vec<CodeActionKind>> {
232 Some(vec![
233 CodeActionKind::EMPTY,
234 CodeActionKind::QUICKFIX,
235 CodeActionKind::REFACTOR,
236 CodeActionKind::REFACTOR_EXTRACT,
237 CodeActionKind::SOURCE,
238 ])
239 }
240
241 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
242 Default::default()
243 }
244
245 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
246 None
247 }
248
249 async fn language_ids(&self) -> HashMap<String, String> {
250 Default::default()
251 }
252}
253
254#[derive(Clone, Debug, PartialEq, Eq)]
255pub struct CodeLabel {
256 pub text: String,
257 pub runs: Vec<(Range<usize>, HighlightId)>,
258 pub filter_range: Range<usize>,
259}
260
261#[derive(Clone, Deserialize)]
262pub struct LanguageConfig {
263 pub name: Arc<str>,
264 pub path_suffixes: Vec<String>,
265 pub brackets: BracketPairConfig,
266 #[serde(default, deserialize_with = "deserialize_regex")]
267 pub first_line_pattern: Option<Regex>,
268 #[serde(default = "auto_indent_using_last_non_empty_line_default")]
269 pub auto_indent_using_last_non_empty_line: bool,
270 #[serde(default, deserialize_with = "deserialize_regex")]
271 pub increase_indent_pattern: Option<Regex>,
272 #[serde(default, deserialize_with = "deserialize_regex")]
273 pub decrease_indent_pattern: Option<Regex>,
274 #[serde(default)]
275 pub autoclose_before: String,
276 #[serde(default)]
277 pub line_comment: Option<Arc<str>>,
278 #[serde(default)]
279 pub block_comment: Option<(Arc<str>, Arc<str>)>,
280 #[serde(default)]
281 pub overrides: HashMap<String, LanguageConfigOverride>,
282}
283
284#[derive(Debug, Default)]
285pub struct LanguageQueries {
286 pub highlights: Option<Cow<'static, str>>,
287 pub brackets: Option<Cow<'static, str>>,
288 pub indents: Option<Cow<'static, str>>,
289 pub outline: Option<Cow<'static, str>>,
290 pub injections: Option<Cow<'static, str>>,
291 pub overrides: Option<Cow<'static, str>>,
292}
293
294#[derive(Clone, Debug)]
295pub struct LanguageScope {
296 language: Arc<Language>,
297 override_id: Option<u32>,
298}
299
300#[derive(Clone, Deserialize, Default, Debug)]
301pub struct LanguageConfigOverride {
302 #[serde(default)]
303 pub line_comment: Override<Arc<str>>,
304 #[serde(default)]
305 pub block_comment: Override<(Arc<str>, Arc<str>)>,
306 #[serde(skip_deserializing)]
307 pub disabled_bracket_ixs: Vec<u16>,
308}
309
310#[derive(Clone, Deserialize, Debug)]
311#[serde(untagged)]
312pub enum Override<T> {
313 Remove { remove: bool },
314 Set(T),
315}
316
317impl<T> Default for Override<T> {
318 fn default() -> Self {
319 Override::Remove { remove: false }
320 }
321}
322
323impl<T> Override<T> {
324 fn as_option<'a>(this: Option<&'a Self>, original: Option<&'a T>) -> Option<&'a T> {
325 match this {
326 Some(Self::Set(value)) => Some(value),
327 Some(Self::Remove { remove: true }) => None,
328 Some(Self::Remove { remove: false }) | None => original,
329 }
330 }
331}
332
333impl Default for LanguageConfig {
334 fn default() -> Self {
335 Self {
336 name: "".into(),
337 path_suffixes: Default::default(),
338 brackets: Default::default(),
339 auto_indent_using_last_non_empty_line: auto_indent_using_last_non_empty_line_default(),
340 first_line_pattern: Default::default(),
341 increase_indent_pattern: Default::default(),
342 decrease_indent_pattern: Default::default(),
343 autoclose_before: Default::default(),
344 line_comment: Default::default(),
345 block_comment: Default::default(),
346 overrides: Default::default(),
347 }
348 }
349}
350
351fn auto_indent_using_last_non_empty_line_default() -> bool {
352 true
353}
354
355fn deserialize_regex<'de, D: Deserializer<'de>>(d: D) -> Result<Option<Regex>, D::Error> {
356 let source = Option::<String>::deserialize(d)?;
357 if let Some(source) = source {
358 Ok(Some(regex::Regex::new(&source).map_err(de::Error::custom)?))
359 } else {
360 Ok(None)
361 }
362}
363
364#[cfg(any(test, feature = "test-support"))]
365pub struct FakeLspAdapter {
366 pub name: &'static str,
367 pub capabilities: lsp::ServerCapabilities,
368 pub initializer: Option<Box<dyn 'static + Send + Sync + Fn(&mut lsp::FakeLanguageServer)>>,
369 pub disk_based_diagnostics_progress_token: Option<String>,
370 pub disk_based_diagnostics_sources: Vec<String>,
371}
372
373#[derive(Clone, Debug, Default)]
374pub struct BracketPairConfig {
375 pub pairs: Vec<BracketPair>,
376 pub disabled_scopes_by_bracket_ix: Vec<Vec<String>>,
377}
378
379impl<'de> Deserialize<'de> for BracketPairConfig {
380 fn deserialize<D>(deserializer: D) -> std::result::Result<Self, D::Error>
381 where
382 D: Deserializer<'de>,
383 {
384 #[derive(Deserialize)]
385 pub struct Entry {
386 #[serde(flatten)]
387 pub bracket_pair: BracketPair,
388 #[serde(default)]
389 pub not_in: Vec<String>,
390 }
391
392 let result = Vec::<Entry>::deserialize(deserializer)?;
393 let mut brackets = Vec::with_capacity(result.len());
394 let mut disabled_scopes_by_bracket_ix = Vec::with_capacity(result.len());
395 for entry in result {
396 brackets.push(entry.bracket_pair);
397 disabled_scopes_by_bracket_ix.push(entry.not_in);
398 }
399
400 Ok(BracketPairConfig {
401 pairs: brackets,
402 disabled_scopes_by_bracket_ix,
403 })
404 }
405}
406
407#[derive(Clone, Debug, Default, Deserialize, PartialEq)]
408pub struct BracketPair {
409 pub start: String,
410 pub end: String,
411 pub close: bool,
412 pub newline: bool,
413}
414
415pub struct Language {
416 pub(crate) config: LanguageConfig,
417 pub(crate) grammar: Option<Arc<Grammar>>,
418 pub(crate) adapters: Vec<Arc<CachedLspAdapter>>,
419
420 #[cfg(any(test, feature = "test-support"))]
421 fake_adapter: Option<(
422 mpsc::UnboundedSender<lsp::FakeLanguageServer>,
423 Arc<FakeLspAdapter>,
424 )>,
425}
426
427pub struct Grammar {
428 id: usize,
429 pub(crate) ts_language: tree_sitter::Language,
430 pub(crate) error_query: Query,
431 pub(crate) highlights_query: Option<Query>,
432 pub(crate) brackets_config: Option<BracketConfig>,
433 pub(crate) indents_config: Option<IndentConfig>,
434 pub(crate) outline_config: Option<OutlineConfig>,
435 pub(crate) injection_config: Option<InjectionConfig>,
436 pub(crate) override_config: Option<OverrideConfig>,
437 pub(crate) highlight_map: Mutex<HighlightMap>,
438}
439
440struct IndentConfig {
441 query: Query,
442 indent_capture_ix: u32,
443 start_capture_ix: Option<u32>,
444 end_capture_ix: Option<u32>,
445 outdent_capture_ix: Option<u32>,
446}
447
448struct OutlineConfig {
449 query: Query,
450 item_capture_ix: u32,
451 name_capture_ix: u32,
452 context_capture_ix: Option<u32>,
453}
454
455struct InjectionConfig {
456 query: Query,
457 content_capture_ix: u32,
458 language_capture_ix: Option<u32>,
459 patterns: Vec<InjectionPatternConfig>,
460}
461
462struct OverrideConfig {
463 query: Query,
464 values: HashMap<u32, (String, LanguageConfigOverride)>,
465}
466
467#[derive(Default, Clone)]
468struct InjectionPatternConfig {
469 language: Option<Box<str>>,
470 combined: bool,
471}
472
473struct BracketConfig {
474 query: Query,
475 open_capture_ix: u32,
476 close_capture_ix: u32,
477}
478
479#[derive(Clone)]
480pub enum LanguageServerBinaryStatus {
481 CheckingForUpdate,
482 Downloading,
483 Downloaded,
484 Cached,
485 Failed { error: String },
486}
487
488type AvailableLanguageId = usize;
489
490#[derive(Clone)]
491struct AvailableLanguage {
492 id: AvailableLanguageId,
493 path: &'static str,
494 config: LanguageConfig,
495 grammar: tree_sitter::Language,
496 lsp_adapters: Vec<Arc<dyn LspAdapter>>,
497 get_queries: fn(&str) -> LanguageQueries,
498}
499
500pub struct LanguageRegistry {
501 state: RwLock<LanguageRegistryState>,
502 language_server_download_dir: Option<Arc<Path>>,
503 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
504 lsp_binary_statuses_rx: async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)>,
505 login_shell_env_loaded: Shared<Task<()>>,
506 #[allow(clippy::type_complexity)]
507 lsp_binary_paths: Mutex<
508 HashMap<
509 LanguageServerName,
510 Shared<BoxFuture<'static, Result<LanguageServerBinary, Arc<anyhow::Error>>>>,
511 >,
512 >,
513 executor: Option<Arc<Background>>,
514}
515
516struct LanguageRegistryState {
517 next_language_server_id: usize,
518 languages: Vec<Arc<Language>>,
519 available_languages: Vec<AvailableLanguage>,
520 next_available_language_id: AvailableLanguageId,
521 loading_languages: HashMap<AvailableLanguageId, Vec<oneshot::Sender<Result<Arc<Language>>>>>,
522 subscription: (watch::Sender<()>, watch::Receiver<()>),
523 theme: Option<Arc<Theme>>,
524 version: usize,
525}
526
527pub struct PendingLanguageServer {
528 pub server_id: LanguageServerId,
529 pub task: Task<Result<lsp::LanguageServer>>,
530}
531
532impl LanguageRegistry {
533 pub fn new(login_shell_env_loaded: Task<()>) -> Self {
534 let (lsp_binary_statuses_tx, lsp_binary_statuses_rx) = async_broadcast::broadcast(16);
535 Self {
536 state: RwLock::new(LanguageRegistryState {
537 next_language_server_id: 0,
538 languages: vec![PLAIN_TEXT.clone()],
539 available_languages: Default::default(),
540 next_available_language_id: 0,
541 loading_languages: Default::default(),
542 subscription: watch::channel(),
543 theme: Default::default(),
544 version: 0,
545 }),
546 language_server_download_dir: None,
547 lsp_binary_statuses_tx,
548 lsp_binary_statuses_rx,
549 login_shell_env_loaded: login_shell_env_loaded.shared(),
550 lsp_binary_paths: Default::default(),
551 executor: None,
552 }
553 }
554
555 #[cfg(any(test, feature = "test-support"))]
556 pub fn test() -> Self {
557 Self::new(Task::ready(()))
558 }
559
560 pub fn set_executor(&mut self, executor: Arc<Background>) {
561 self.executor = Some(executor);
562 }
563
564 pub fn register(
565 &self,
566 path: &'static str,
567 config: LanguageConfig,
568 grammar: tree_sitter::Language,
569 lsp_adapters: Vec<Arc<dyn LspAdapter>>,
570 get_queries: fn(&str) -> LanguageQueries,
571 ) {
572 let state = &mut *self.state.write();
573 state.available_languages.push(AvailableLanguage {
574 id: post_inc(&mut state.next_available_language_id),
575 path,
576 config,
577 grammar,
578 lsp_adapters,
579 get_queries,
580 });
581 }
582
583 pub fn language_names(&self) -> Vec<String> {
584 let state = self.state.read();
585 let mut result = state
586 .available_languages
587 .iter()
588 .map(|l| l.config.name.to_string())
589 .chain(state.languages.iter().map(|l| l.config.name.to_string()))
590 .collect::<Vec<_>>();
591 result.sort_unstable_by_key(|language_name| language_name.to_lowercase());
592 result
593 }
594
595 pub fn workspace_configuration(&self, cx: &mut AppContext) -> Task<serde_json::Value> {
596 let lsp_adapters = {
597 let state = self.state.read();
598 state
599 .available_languages
600 .iter()
601 .flat_map(|l| l.lsp_adapters.clone())
602 .chain(
603 state
604 .languages
605 .iter()
606 .flat_map(|language| &language.adapters)
607 .map(|adapter| adapter.adapter.clone()),
608 )
609 .collect::<Vec<_>>()
610 };
611
612 let mut language_configs = Vec::new();
613 for adapter in &lsp_adapters {
614 if let Some(language_config) = adapter.workspace_configuration(cx) {
615 language_configs.push(language_config);
616 }
617 }
618
619 cx.background().spawn(async move {
620 let mut config = serde_json::json!({});
621 let language_configs = futures::future::join_all(language_configs).await;
622 for language_config in language_configs {
623 merge_json_value_into(language_config, &mut config);
624 }
625 config
626 })
627 }
628
629 pub fn add(&self, language: Arc<Language>) {
630 self.state.write().add(language);
631 }
632
633 pub fn subscribe(&self) -> watch::Receiver<()> {
634 self.state.read().subscription.1.clone()
635 }
636
637 pub fn version(&self) -> usize {
638 self.state.read().version
639 }
640
641 pub fn set_theme(&self, theme: Arc<Theme>) {
642 let mut state = self.state.write();
643 state.theme = Some(theme.clone());
644 for language in &state.languages {
645 language.set_theme(&theme.editor.syntax);
646 }
647 }
648
649 pub fn set_language_server_download_dir(&mut self, path: impl Into<Arc<Path>>) {
650 self.language_server_download_dir = Some(path.into());
651 }
652
653 pub fn language_for_name(
654 self: &Arc<Self>,
655 name: &str,
656 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
657 let name = UniCase::new(name);
658 self.get_or_load_language(|config| UniCase::new(config.name.as_ref()) == name)
659 }
660
661 pub fn language_for_name_or_extension(
662 self: &Arc<Self>,
663 string: &str,
664 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
665 let string = UniCase::new(string);
666 self.get_or_load_language(|config| {
667 UniCase::new(config.name.as_ref()) == string
668 || config
669 .path_suffixes
670 .iter()
671 .any(|suffix| UniCase::new(suffix) == string)
672 })
673 }
674
675 pub fn language_for_file(
676 self: &Arc<Self>,
677 path: impl AsRef<Path>,
678 content: Option<&Rope>,
679 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
680 let path = path.as_ref();
681 let filename = path.file_name().and_then(|name| name.to_str());
682 let extension = path.extension().and_then(|name| name.to_str());
683 let path_suffixes = [extension, filename];
684 self.get_or_load_language(|config| {
685 let path_matches = config
686 .path_suffixes
687 .iter()
688 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())));
689 let content_matches = content.zip(config.first_line_pattern.as_ref()).map_or(
690 false,
691 |(content, pattern)| {
692 let end = content.clip_point(Point::new(0, 256), Bias::Left);
693 let end = content.point_to_offset(end);
694 let text = content.chunks_in_range(0..end).collect::<String>();
695 pattern.is_match(&text)
696 },
697 );
698 path_matches || content_matches
699 })
700 }
701
702 fn get_or_load_language(
703 self: &Arc<Self>,
704 callback: impl Fn(&LanguageConfig) -> bool,
705 ) -> UnwrapFuture<oneshot::Receiver<Result<Arc<Language>>>> {
706 let (tx, rx) = oneshot::channel();
707
708 let mut state = self.state.write();
709 if let Some(language) = state
710 .languages
711 .iter()
712 .find(|language| callback(&language.config))
713 {
714 let _ = tx.send(Ok(language.clone()));
715 } else if let Some(executor) = self.executor.clone() {
716 if let Some(language) = state
717 .available_languages
718 .iter()
719 .find(|l| callback(&l.config))
720 .cloned()
721 {
722 let txs = state
723 .loading_languages
724 .entry(language.id)
725 .or_insert_with(|| {
726 let this = self.clone();
727 executor
728 .spawn(async move {
729 let id = language.id;
730 let queries = (language.get_queries)(&language.path);
731 let language =
732 Language::new(language.config, Some(language.grammar))
733 .with_lsp_adapters(language.lsp_adapters)
734 .await;
735 let name = language.name();
736 match language.with_queries(queries) {
737 Ok(language) => {
738 let language = Arc::new(language);
739 let mut state = this.state.write();
740 state.add(language.clone());
741 state
742 .available_languages
743 .retain(|language| language.id != id);
744 if let Some(mut txs) = state.loading_languages.remove(&id) {
745 for tx in txs.drain(..) {
746 let _ = tx.send(Ok(language.clone()));
747 }
748 }
749 }
750 Err(err) => {
751 let mut state = this.state.write();
752 state
753 .available_languages
754 .retain(|language| language.id != id);
755 if let Some(mut txs) = state.loading_languages.remove(&id) {
756 for tx in txs.drain(..) {
757 let _ = tx.send(Err(anyhow!(
758 "failed to load language {}: {}",
759 name,
760 err
761 )));
762 }
763 }
764 }
765 };
766 })
767 .detach();
768
769 Vec::new()
770 });
771 txs.push(tx);
772 } else {
773 let _ = tx.send(Err(anyhow!("language not found")));
774 }
775 } else {
776 let _ = tx.send(Err(anyhow!("executor does not exist")));
777 }
778
779 rx.unwrap()
780 }
781
782 pub fn to_vec(&self) -> Vec<Arc<Language>> {
783 self.state.read().languages.iter().cloned().collect()
784 }
785
786 pub fn start_language_server(
787 self: &Arc<Self>,
788 language: Arc<Language>,
789 adapter: Arc<CachedLspAdapter>,
790 root_path: Arc<Path>,
791 http_client: Arc<dyn HttpClient>,
792 cx: &mut AppContext,
793 ) -> Option<PendingLanguageServer> {
794 #[cfg(any(test, feature = "test-support"))]
795 if language.fake_adapter.is_some() {
796 let task = cx.spawn(|cx| async move {
797 let (servers_tx, fake_adapter) = language.fake_adapter.as_ref().unwrap();
798 let (server, mut fake_server) = lsp::LanguageServer::fake(
799 fake_adapter.name.to_string(),
800 fake_adapter.capabilities.clone(),
801 cx.clone(),
802 );
803
804 if let Some(initializer) = &fake_adapter.initializer {
805 initializer(&mut fake_server);
806 }
807
808 let servers_tx = servers_tx.clone();
809 cx.background()
810 .spawn(async move {
811 if fake_server
812 .try_receive_notification::<lsp::notification::Initialized>()
813 .await
814 .is_some()
815 {
816 servers_tx.unbounded_send(fake_server).ok();
817 }
818 })
819 .detach();
820 Ok(server)
821 });
822
823 let server_id = self.state.write().next_language_server_id();
824 return Some(PendingLanguageServer { server_id, task });
825 }
826
827 let download_dir = self
828 .language_server_download_dir
829 .clone()
830 .ok_or_else(|| anyhow!("language server download directory has not been assigned"))
831 .log_err()?;
832
833 let this = self.clone();
834 let language = language.clone();
835 let http_client = http_client.clone();
836 let download_dir = download_dir.clone();
837 let root_path = root_path.clone();
838 let adapter = adapter.clone();
839 let lsp_binary_statuses = self.lsp_binary_statuses_tx.clone();
840 let login_shell_env_loaded = self.login_shell_env_loaded.clone();
841 let server_id = self.state.write().next_language_server_id();
842
843 let task = cx.spawn(|cx| async move {
844 login_shell_env_loaded.await;
845
846 let mut lock = this.lsp_binary_paths.lock();
847 let entry = lock
848 .entry(adapter.name.clone())
849 .or_insert_with(|| {
850 get_binary(
851 adapter.clone(),
852 language.clone(),
853 http_client,
854 download_dir,
855 lsp_binary_statuses,
856 )
857 .map_err(Arc::new)
858 .boxed()
859 .shared()
860 })
861 .clone();
862 drop(lock);
863 let binary = entry.clone().map_err(|e| anyhow!(e)).await?;
864
865 let server = lsp::LanguageServer::new(
866 server_id,
867 &binary.path,
868 &binary.arguments,
869 &root_path,
870 adapter.code_action_kinds(),
871 cx,
872 )?;
873
874 Ok(server)
875 });
876
877 Some(PendingLanguageServer { server_id, task })
878 }
879
880 pub fn language_server_binary_statuses(
881 &self,
882 ) -> async_broadcast::Receiver<(Arc<Language>, LanguageServerBinaryStatus)> {
883 self.lsp_binary_statuses_rx.clone()
884 }
885}
886
887impl LanguageRegistryState {
888 fn next_language_server_id(&mut self) -> LanguageServerId {
889 LanguageServerId(post_inc(&mut self.next_language_server_id))
890 }
891
892 fn add(&mut self, language: Arc<Language>) {
893 if let Some(theme) = self.theme.as_ref() {
894 language.set_theme(&theme.editor.syntax);
895 }
896 self.languages.push(language);
897 self.version += 1;
898 *self.subscription.0.borrow_mut() = ();
899 }
900}
901
902#[cfg(any(test, feature = "test-support"))]
903impl Default for LanguageRegistry {
904 fn default() -> Self {
905 Self::test()
906 }
907}
908
909async fn get_binary(
910 adapter: Arc<CachedLspAdapter>,
911 language: Arc<Language>,
912 http_client: Arc<dyn HttpClient>,
913 download_dir: Arc<Path>,
914 statuses: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
915) -> Result<LanguageServerBinary> {
916 let container_dir = download_dir.join(adapter.name.0.as_ref());
917 if !container_dir.exists() {
918 smol::fs::create_dir_all(&container_dir)
919 .await
920 .context("failed to create container directory")?;
921 }
922
923 let binary = fetch_latest_binary(
924 adapter.clone(),
925 language.clone(),
926 http_client,
927 &container_dir,
928 statuses.clone(),
929 )
930 .await;
931
932 if let Err(error) = binary.as_ref() {
933 if let Some(cached) = adapter.cached_server_binary(container_dir).await {
934 statuses
935 .broadcast((language.clone(), LanguageServerBinaryStatus::Cached))
936 .await?;
937 return Ok(cached);
938 } else {
939 statuses
940 .broadcast((
941 language.clone(),
942 LanguageServerBinaryStatus::Failed {
943 error: format!("{:?}", error),
944 },
945 ))
946 .await?;
947 }
948 }
949 binary
950}
951
952async fn fetch_latest_binary(
953 adapter: Arc<CachedLspAdapter>,
954 language: Arc<Language>,
955 http_client: Arc<dyn HttpClient>,
956 container_dir: &Path,
957 lsp_binary_statuses_tx: async_broadcast::Sender<(Arc<Language>, LanguageServerBinaryStatus)>,
958) -> Result<LanguageServerBinary> {
959 let container_dir: Arc<Path> = container_dir.into();
960 lsp_binary_statuses_tx
961 .broadcast((
962 language.clone(),
963 LanguageServerBinaryStatus::CheckingForUpdate,
964 ))
965 .await?;
966 let version_info = adapter
967 .fetch_latest_server_version(http_client.clone())
968 .await?;
969 lsp_binary_statuses_tx
970 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloading))
971 .await?;
972 let binary = adapter
973 .fetch_server_binary(version_info, http_client, container_dir.to_path_buf())
974 .await?;
975 lsp_binary_statuses_tx
976 .broadcast((language.clone(), LanguageServerBinaryStatus::Downloaded))
977 .await?;
978 Ok(binary)
979}
980
981impl Language {
982 pub fn new(config: LanguageConfig, ts_language: Option<tree_sitter::Language>) -> Self {
983 Self {
984 config,
985 grammar: ts_language.map(|ts_language| {
986 Arc::new(Grammar {
987 id: NEXT_GRAMMAR_ID.fetch_add(1, SeqCst),
988 highlights_query: None,
989 brackets_config: None,
990 outline_config: None,
991 indents_config: None,
992 injection_config: None,
993 override_config: None,
994 error_query: Query::new(ts_language, "(ERROR) @error").unwrap(),
995 ts_language,
996 highlight_map: Default::default(),
997 })
998 }),
999 adapters: Vec::new(),
1000
1001 #[cfg(any(test, feature = "test-support"))]
1002 fake_adapter: None,
1003 }
1004 }
1005
1006 pub fn lsp_adapters(&self) -> &[Arc<CachedLspAdapter>] {
1007 &self.adapters
1008 }
1009
1010 pub fn id(&self) -> Option<usize> {
1011 self.grammar.as_ref().map(|g| g.id)
1012 }
1013
1014 pub fn with_queries(mut self, queries: LanguageQueries) -> Result<Self> {
1015 if let Some(query) = queries.highlights {
1016 self = self
1017 .with_highlights_query(query.as_ref())
1018 .expect("failed to evaluate highlights query");
1019 }
1020 if let Some(query) = queries.brackets {
1021 self = self
1022 .with_brackets_query(query.as_ref())
1023 .expect("failed to load brackets query");
1024 }
1025 if let Some(query) = queries.indents {
1026 self = self
1027 .with_indents_query(query.as_ref())
1028 .expect("failed to load indents query");
1029 }
1030 if let Some(query) = queries.outline {
1031 self = self
1032 .with_outline_query(query.as_ref())
1033 .expect("failed to load outline query");
1034 }
1035 if let Some(query) = queries.injections {
1036 self = self
1037 .with_injection_query(query.as_ref())
1038 .expect("failed to load injection query");
1039 }
1040 if let Some(query) = queries.overrides {
1041 self = self
1042 .with_override_query(query.as_ref())
1043 .expect("failed to load override query");
1044 }
1045 Ok(self)
1046 }
1047 pub fn with_highlights_query(mut self, source: &str) -> Result<Self> {
1048 let grammar = self.grammar_mut();
1049 grammar.highlights_query = Some(Query::new(grammar.ts_language, source)?);
1050 Ok(self)
1051 }
1052
1053 pub fn with_outline_query(mut self, source: &str) -> Result<Self> {
1054 let grammar = self.grammar_mut();
1055 let query = Query::new(grammar.ts_language, source)?;
1056 let mut item_capture_ix = None;
1057 let mut name_capture_ix = None;
1058 let mut context_capture_ix = None;
1059 get_capture_indices(
1060 &query,
1061 &mut [
1062 ("item", &mut item_capture_ix),
1063 ("name", &mut name_capture_ix),
1064 ("context", &mut context_capture_ix),
1065 ],
1066 );
1067 if let Some((item_capture_ix, name_capture_ix)) = item_capture_ix.zip(name_capture_ix) {
1068 grammar.outline_config = Some(OutlineConfig {
1069 query,
1070 item_capture_ix,
1071 name_capture_ix,
1072 context_capture_ix,
1073 });
1074 }
1075 Ok(self)
1076 }
1077
1078 pub fn with_brackets_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 open_capture_ix = None;
1082 let mut close_capture_ix = None;
1083 get_capture_indices(
1084 &query,
1085 &mut [
1086 ("open", &mut open_capture_ix),
1087 ("close", &mut close_capture_ix),
1088 ],
1089 );
1090 if let Some((open_capture_ix, close_capture_ix)) = open_capture_ix.zip(close_capture_ix) {
1091 grammar.brackets_config = Some(BracketConfig {
1092 query,
1093 open_capture_ix,
1094 close_capture_ix,
1095 });
1096 }
1097 Ok(self)
1098 }
1099
1100 pub fn with_indents_query(mut self, source: &str) -> Result<Self> {
1101 let grammar = self.grammar_mut();
1102 let query = Query::new(grammar.ts_language, source)?;
1103 let mut indent_capture_ix = None;
1104 let mut start_capture_ix = None;
1105 let mut end_capture_ix = None;
1106 let mut outdent_capture_ix = None;
1107 get_capture_indices(
1108 &query,
1109 &mut [
1110 ("indent", &mut indent_capture_ix),
1111 ("start", &mut start_capture_ix),
1112 ("end", &mut end_capture_ix),
1113 ("outdent", &mut outdent_capture_ix),
1114 ],
1115 );
1116 if let Some(indent_capture_ix) = indent_capture_ix {
1117 grammar.indents_config = Some(IndentConfig {
1118 query,
1119 indent_capture_ix,
1120 start_capture_ix,
1121 end_capture_ix,
1122 outdent_capture_ix,
1123 });
1124 }
1125 Ok(self)
1126 }
1127
1128 pub fn with_injection_query(mut self, source: &str) -> Result<Self> {
1129 let grammar = self.grammar_mut();
1130 let query = Query::new(grammar.ts_language, source)?;
1131 let mut language_capture_ix = None;
1132 let mut content_capture_ix = None;
1133 get_capture_indices(
1134 &query,
1135 &mut [
1136 ("language", &mut language_capture_ix),
1137 ("content", &mut content_capture_ix),
1138 ],
1139 );
1140 let patterns = (0..query.pattern_count())
1141 .map(|ix| {
1142 let mut config = InjectionPatternConfig::default();
1143 for setting in query.property_settings(ix) {
1144 match setting.key.as_ref() {
1145 "language" => {
1146 config.language = setting.value.clone();
1147 }
1148 "combined" => {
1149 config.combined = true;
1150 }
1151 _ => {}
1152 }
1153 }
1154 config
1155 })
1156 .collect();
1157 if let Some(content_capture_ix) = content_capture_ix {
1158 grammar.injection_config = Some(InjectionConfig {
1159 query,
1160 language_capture_ix,
1161 content_capture_ix,
1162 patterns,
1163 });
1164 }
1165 Ok(self)
1166 }
1167
1168 pub fn with_override_query(mut self, source: &str) -> Result<Self> {
1169 let query = Query::new(self.grammar_mut().ts_language, source)?;
1170
1171 let mut override_configs_by_id = HashMap::default();
1172 for (ix, name) in query.capture_names().iter().enumerate() {
1173 if !name.starts_with('_') {
1174 let value = self.config.overrides.remove(name).unwrap_or_default();
1175 override_configs_by_id.insert(ix as u32, (name.clone(), value));
1176 }
1177 }
1178
1179 if !self.config.overrides.is_empty() {
1180 let keys = self.config.overrides.keys().collect::<Vec<_>>();
1181 Err(anyhow!(
1182 "language {:?} has overrides in config not in query: {keys:?}",
1183 self.config.name
1184 ))?;
1185 }
1186
1187 for disabled_scope_name in self
1188 .config
1189 .brackets
1190 .disabled_scopes_by_bracket_ix
1191 .iter()
1192 .flatten()
1193 {
1194 if !override_configs_by_id
1195 .values()
1196 .any(|(scope_name, _)| scope_name == disabled_scope_name)
1197 {
1198 Err(anyhow!(
1199 "language {:?} has overrides in config not in query: {disabled_scope_name:?}",
1200 self.config.name
1201 ))?;
1202 }
1203 }
1204
1205 for (name, override_config) in override_configs_by_id.values_mut() {
1206 override_config.disabled_bracket_ixs = self
1207 .config
1208 .brackets
1209 .disabled_scopes_by_bracket_ix
1210 .iter()
1211 .enumerate()
1212 .filter_map(|(ix, disabled_scope_names)| {
1213 if disabled_scope_names.contains(name) {
1214 Some(ix as u16)
1215 } else {
1216 None
1217 }
1218 })
1219 .collect();
1220 }
1221
1222 self.config.brackets.disabled_scopes_by_bracket_ix.clear();
1223 self.grammar_mut().override_config = Some(OverrideConfig {
1224 query,
1225 values: override_configs_by_id,
1226 });
1227 Ok(self)
1228 }
1229
1230 fn grammar_mut(&mut self) -> &mut Grammar {
1231 Arc::get_mut(self.grammar.as_mut().unwrap()).unwrap()
1232 }
1233
1234 pub async fn with_lsp_adapters(mut self, lsp_adapters: Vec<Arc<dyn LspAdapter>>) -> Self {
1235 for adapter in lsp_adapters {
1236 self.adapters.push(CachedLspAdapter::new(adapter).await);
1237 }
1238 self
1239 }
1240
1241 #[cfg(any(test, feature = "test-support"))]
1242 pub async fn set_fake_lsp_adapter(
1243 &mut self,
1244 fake_lsp_adapter: Arc<FakeLspAdapter>,
1245 ) -> mpsc::UnboundedReceiver<lsp::FakeLanguageServer> {
1246 let (servers_tx, servers_rx) = mpsc::unbounded();
1247 self.fake_adapter = Some((servers_tx, fake_lsp_adapter.clone()));
1248 let adapter = CachedLspAdapter::new(Arc::new(fake_lsp_adapter)).await;
1249 self.adapters = vec![adapter];
1250 servers_rx
1251 }
1252
1253 pub fn name(&self) -> Arc<str> {
1254 self.config.name.clone()
1255 }
1256
1257 pub async fn disk_based_diagnostic_sources(&self) -> &[String] {
1258 match self.adapters.first().as_ref() {
1259 Some(adapter) => &adapter.disk_based_diagnostic_sources,
1260 None => &[],
1261 }
1262 }
1263
1264 pub async fn disk_based_diagnostics_progress_token(&self) -> Option<&str> {
1265 for adapter in &self.adapters {
1266 let token = adapter.disk_based_diagnostics_progress_token.as_deref();
1267 if token.is_some() {
1268 return token;
1269 }
1270 }
1271
1272 None
1273 }
1274
1275 pub async fn process_diagnostics(&self, diagnostics: &mut lsp::PublishDiagnosticsParams) {
1276 for adapter in &self.adapters {
1277 adapter.process_diagnostics(diagnostics).await;
1278 }
1279 }
1280
1281 pub async fn process_completion(self: &Arc<Self>, completion: &mut lsp::CompletionItem) {
1282 for adapter in &self.adapters {
1283 adapter.process_completion(completion).await;
1284 }
1285 }
1286
1287 pub async fn label_for_completion(
1288 self: &Arc<Self>,
1289 completion: &lsp::CompletionItem,
1290 ) -> Option<CodeLabel> {
1291 self.adapters
1292 .first()
1293 .as_ref()?
1294 .label_for_completion(completion, self)
1295 .await
1296 }
1297
1298 pub async fn label_for_symbol(
1299 self: &Arc<Self>,
1300 name: &str,
1301 kind: lsp::SymbolKind,
1302 ) -> Option<CodeLabel> {
1303 self.adapters
1304 .first()
1305 .as_ref()?
1306 .label_for_symbol(name, kind, self)
1307 .await
1308 }
1309
1310 pub fn highlight_text<'a>(
1311 self: &'a Arc<Self>,
1312 text: &'a Rope,
1313 range: Range<usize>,
1314 ) -> Vec<(Range<usize>, HighlightId)> {
1315 let mut result = Vec::new();
1316 if let Some(grammar) = &self.grammar {
1317 let tree = grammar.parse_text(text, None);
1318 let captures =
1319 SyntaxSnapshot::single_tree_captures(range.clone(), text, &tree, self, |grammar| {
1320 grammar.highlights_query.as_ref()
1321 });
1322 let highlight_maps = vec![grammar.highlight_map()];
1323 let mut offset = 0;
1324 for chunk in BufferChunks::new(text, range, Some((captures, highlight_maps)), vec![]) {
1325 let end_offset = offset + chunk.text.len();
1326 if let Some(highlight_id) = chunk.syntax_highlight_id {
1327 if !highlight_id.is_default() {
1328 result.push((offset..end_offset, highlight_id));
1329 }
1330 }
1331 offset = end_offset;
1332 }
1333 }
1334 result
1335 }
1336
1337 pub fn path_suffixes(&self) -> &[String] {
1338 &self.config.path_suffixes
1339 }
1340
1341 pub fn should_autoclose_before(&self, c: char) -> bool {
1342 c.is_whitespace() || self.config.autoclose_before.contains(c)
1343 }
1344
1345 pub fn set_theme(&self, theme: &SyntaxTheme) {
1346 if let Some(grammar) = self.grammar.as_ref() {
1347 if let Some(highlights_query) = &grammar.highlights_query {
1348 *grammar.highlight_map.lock() =
1349 HighlightMap::new(highlights_query.capture_names(), theme);
1350 }
1351 }
1352 }
1353
1354 pub fn grammar(&self) -> Option<&Arc<Grammar>> {
1355 self.grammar.as_ref()
1356 }
1357}
1358
1359impl LanguageScope {
1360 pub fn line_comment_prefix(&self) -> Option<&Arc<str>> {
1361 Override::as_option(
1362 self.config_override().map(|o| &o.line_comment),
1363 self.language.config.line_comment.as_ref(),
1364 )
1365 }
1366
1367 pub fn block_comment_delimiters(&self) -> Option<(&Arc<str>, &Arc<str>)> {
1368 Override::as_option(
1369 self.config_override().map(|o| &o.block_comment),
1370 self.language.config.block_comment.as_ref(),
1371 )
1372 .map(|e| (&e.0, &e.1))
1373 }
1374
1375 pub fn brackets(&self) -> impl Iterator<Item = (&BracketPair, bool)> {
1376 let mut disabled_ids = self
1377 .config_override()
1378 .map_or(&[] as _, |o| o.disabled_bracket_ixs.as_slice());
1379 self.language
1380 .config
1381 .brackets
1382 .pairs
1383 .iter()
1384 .enumerate()
1385 .map(move |(ix, bracket)| {
1386 let mut is_enabled = true;
1387 if let Some(next_disabled_ix) = disabled_ids.first() {
1388 if ix == *next_disabled_ix as usize {
1389 disabled_ids = &disabled_ids[1..];
1390 is_enabled = false;
1391 }
1392 }
1393 (bracket, is_enabled)
1394 })
1395 }
1396
1397 pub fn should_autoclose_before(&self, c: char) -> bool {
1398 c.is_whitespace() || self.language.config.autoclose_before.contains(c)
1399 }
1400
1401 fn config_override(&self) -> Option<&LanguageConfigOverride> {
1402 let id = self.override_id?;
1403 let grammar = self.language.grammar.as_ref()?;
1404 let override_config = grammar.override_config.as_ref()?;
1405 override_config.values.get(&id).map(|e| &e.1)
1406 }
1407}
1408
1409impl Hash for Language {
1410 fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
1411 self.id().hash(state)
1412 }
1413}
1414
1415impl PartialEq for Language {
1416 fn eq(&self, other: &Self) -> bool {
1417 self.id().eq(&other.id())
1418 }
1419}
1420
1421impl Eq for Language {}
1422
1423impl Debug for Language {
1424 fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
1425 f.debug_struct("Language")
1426 .field("name", &self.config.name)
1427 .finish()
1428 }
1429}
1430
1431impl Grammar {
1432 pub fn id(&self) -> usize {
1433 self.id
1434 }
1435
1436 fn parse_text(&self, text: &Rope, old_tree: Option<Tree>) -> Tree {
1437 PARSER.with(|parser| {
1438 let mut parser = parser.borrow_mut();
1439 parser
1440 .set_language(self.ts_language)
1441 .expect("incompatible grammar");
1442 let mut chunks = text.chunks_in_range(0..text.len());
1443 parser
1444 .parse_with(
1445 &mut move |offset, _| {
1446 chunks.seek(offset);
1447 chunks.next().unwrap_or("").as_bytes()
1448 },
1449 old_tree.as_ref(),
1450 )
1451 .unwrap()
1452 })
1453 }
1454
1455 pub fn highlight_map(&self) -> HighlightMap {
1456 self.highlight_map.lock().clone()
1457 }
1458
1459 pub fn highlight_id_for_name(&self, name: &str) -> Option<HighlightId> {
1460 let capture_id = self
1461 .highlights_query
1462 .as_ref()?
1463 .capture_index_for_name(name)?;
1464 Some(self.highlight_map.lock().get(capture_id))
1465 }
1466}
1467
1468impl CodeLabel {
1469 pub fn plain(text: String, filter_text: Option<&str>) -> Self {
1470 let mut result = Self {
1471 runs: Vec::new(),
1472 filter_range: 0..text.len(),
1473 text,
1474 };
1475 if let Some(filter_text) = filter_text {
1476 if let Some(ix) = result.text.find(filter_text) {
1477 result.filter_range = ix..ix + filter_text.len();
1478 }
1479 }
1480 result
1481 }
1482}
1483
1484#[cfg(any(test, feature = "test-support"))]
1485impl Default for FakeLspAdapter {
1486 fn default() -> Self {
1487 Self {
1488 name: "the-fake-language-server",
1489 capabilities: lsp::LanguageServer::full_capabilities(),
1490 initializer: None,
1491 disk_based_diagnostics_progress_token: None,
1492 disk_based_diagnostics_sources: Vec::new(),
1493 }
1494 }
1495}
1496
1497#[cfg(any(test, feature = "test-support"))]
1498#[async_trait]
1499impl LspAdapter for Arc<FakeLspAdapter> {
1500 async fn name(&self) -> LanguageServerName {
1501 LanguageServerName(self.name.into())
1502 }
1503
1504 async fn fetch_latest_server_version(
1505 &self,
1506 _: Arc<dyn HttpClient>,
1507 ) -> Result<Box<dyn 'static + Send + Any>> {
1508 unreachable!();
1509 }
1510
1511 async fn fetch_server_binary(
1512 &self,
1513 _: Box<dyn 'static + Send + Any>,
1514 _: Arc<dyn HttpClient>,
1515 _: PathBuf,
1516 ) -> Result<LanguageServerBinary> {
1517 unreachable!();
1518 }
1519
1520 async fn cached_server_binary(&self, _: PathBuf) -> Option<LanguageServerBinary> {
1521 unreachable!();
1522 }
1523
1524 async fn process_diagnostics(&self, _: &mut lsp::PublishDiagnosticsParams) {}
1525
1526 async fn disk_based_diagnostic_sources(&self) -> Vec<String> {
1527 self.disk_based_diagnostics_sources.clone()
1528 }
1529
1530 async fn disk_based_diagnostics_progress_token(&self) -> Option<String> {
1531 self.disk_based_diagnostics_progress_token.clone()
1532 }
1533}
1534
1535fn get_capture_indices(query: &Query, captures: &mut [(&str, &mut Option<u32>)]) {
1536 for (ix, name) in query.capture_names().iter().enumerate() {
1537 for (capture_name, index) in captures.iter_mut() {
1538 if capture_name == name {
1539 **index = Some(ix as u32);
1540 break;
1541 }
1542 }
1543 }
1544}
1545
1546pub fn point_to_lsp(point: PointUtf16) -> lsp::Position {
1547 lsp::Position::new(point.row, point.column)
1548}
1549
1550pub fn point_from_lsp(point: lsp::Position) -> Unclipped<PointUtf16> {
1551 Unclipped(PointUtf16::new(point.line, point.character))
1552}
1553
1554pub fn range_to_lsp(range: Range<PointUtf16>) -> lsp::Range {
1555 lsp::Range {
1556 start: point_to_lsp(range.start),
1557 end: point_to_lsp(range.end),
1558 }
1559}
1560
1561pub fn range_from_lsp(range: lsp::Range) -> Range<Unclipped<PointUtf16>> {
1562 let mut start = point_from_lsp(range.start);
1563 let mut end = point_from_lsp(range.end);
1564 if start > end {
1565 mem::swap(&mut start, &mut end);
1566 }
1567 start..end
1568}
1569
1570#[cfg(test)]
1571mod tests {
1572 use super::*;
1573 use gpui::TestAppContext;
1574
1575 #[gpui::test(iterations = 10)]
1576 async fn test_first_line_pattern(cx: &mut TestAppContext) {
1577 let mut languages = LanguageRegistry::test();
1578 languages.set_executor(cx.background());
1579 let languages = Arc::new(languages);
1580 languages.register(
1581 "/javascript",
1582 LanguageConfig {
1583 name: "JavaScript".into(),
1584 path_suffixes: vec!["js".into()],
1585 first_line_pattern: Some(Regex::new(r"\bnode\b").unwrap()),
1586 ..Default::default()
1587 },
1588 tree_sitter_javascript::language(),
1589 vec![],
1590 |_| Default::default(),
1591 );
1592
1593 languages
1594 .language_for_file("the/script", None)
1595 .await
1596 .unwrap_err();
1597 languages
1598 .language_for_file("the/script", Some(&"nothing".into()))
1599 .await
1600 .unwrap_err();
1601 assert_eq!(
1602 languages
1603 .language_for_file("the/script", Some(&"#!/bin/env node".into()))
1604 .await
1605 .unwrap()
1606 .name()
1607 .as_ref(),
1608 "JavaScript"
1609 );
1610 }
1611
1612 #[gpui::test(iterations = 10)]
1613 async fn test_language_loading(cx: &mut TestAppContext) {
1614 let mut languages = LanguageRegistry::test();
1615 languages.set_executor(cx.background());
1616 let languages = Arc::new(languages);
1617 languages.register(
1618 "/JSON",
1619 LanguageConfig {
1620 name: "JSON".into(),
1621 path_suffixes: vec!["json".into()],
1622 ..Default::default()
1623 },
1624 tree_sitter_json::language(),
1625 vec![],
1626 |_| Default::default(),
1627 );
1628 languages.register(
1629 "/rust",
1630 LanguageConfig {
1631 name: "Rust".into(),
1632 path_suffixes: vec!["rs".into()],
1633 ..Default::default()
1634 },
1635 tree_sitter_rust::language(),
1636 vec![],
1637 |_| Default::default(),
1638 );
1639 assert_eq!(
1640 languages.language_names(),
1641 &[
1642 "JSON".to_string(),
1643 "Plain Text".to_string(),
1644 "Rust".to_string(),
1645 ]
1646 );
1647
1648 let rust1 = languages.language_for_name("Rust");
1649 let rust2 = languages.language_for_name("Rust");
1650
1651 // Ensure language is still listed even if it's being loaded.
1652 assert_eq!(
1653 languages.language_names(),
1654 &[
1655 "JSON".to_string(),
1656 "Plain Text".to_string(),
1657 "Rust".to_string(),
1658 ]
1659 );
1660
1661 let (rust1, rust2) = futures::join!(rust1, rust2);
1662 assert!(Arc::ptr_eq(&rust1.unwrap(), &rust2.unwrap()));
1663
1664 // Ensure language is still listed even after loading it.
1665 assert_eq!(
1666 languages.language_names(),
1667 &[
1668 "JSON".to_string(),
1669 "Plain Text".to_string(),
1670 "Rust".to_string(),
1671 ]
1672 );
1673
1674 // Loading an unknown language returns an error.
1675 assert!(languages.language_for_name("Unknown").await.is_err());
1676 }
1677}