1mod buffer;
2mod diagnostic_set;
3mod highlight_map;
4pub mod proto;
5#[cfg(test)]
6mod tests;
7
8use anyhow::{anyhow, Result};
9pub use buffer::Operation;
10pub use buffer::*;
11pub use diagnostic_set::DiagnosticEntry;
12use gpui::AppContext;
13use highlight_map::HighlightMap;
14use lazy_static::lazy_static;
15use parking_lot::Mutex;
16use serde::Deserialize;
17use std::{collections::HashSet, path::Path, str, sync::Arc};
18use theme::SyntaxTheme;
19use tree_sitter::{self, Query};
20pub use tree_sitter::{Parser, Tree};
21
22lazy_static! {
23 pub static ref PLAIN_TEXT: Arc<Language> = Arc::new(Language::new(
24 LanguageConfig {
25 name: "Plain Text".to_string(),
26 path_suffixes: Default::default(),
27 brackets: Default::default(),
28 line_comment: None,
29 language_server: None,
30 },
31 None,
32 ));
33}
34
35#[derive(Default, Deserialize)]
36pub struct LanguageConfig {
37 pub name: String,
38 pub path_suffixes: Vec<String>,
39 pub brackets: Vec<BracketPair>,
40 pub line_comment: Option<String>,
41 pub language_server: Option<LanguageServerConfig>,
42}
43
44#[derive(Default, Deserialize)]
45pub struct LanguageServerConfig {
46 pub binary: String,
47 pub disk_based_diagnostic_sources: HashSet<String>,
48 #[cfg(any(test, feature = "test-support"))]
49 #[serde(skip)]
50 pub fake_server: Option<(Arc<lsp::LanguageServer>, Arc<std::sync::atomic::AtomicBool>)>,
51}
52
53#[derive(Clone, Debug, Deserialize)]
54pub struct BracketPair {
55 pub start: String,
56 pub end: String,
57 pub close: bool,
58 pub newline: bool,
59}
60
61pub struct Language {
62 pub(crate) config: LanguageConfig,
63 pub(crate) grammar: Option<Arc<Grammar>>,
64}
65
66pub struct Grammar {
67 pub(crate) ts_language: tree_sitter::Language,
68 pub(crate) highlights_query: Query,
69 pub(crate) brackets_query: Query,
70 pub(crate) indents_query: Query,
71 pub(crate) highlight_map: Mutex<HighlightMap>,
72}
73
74#[derive(Default)]
75pub struct LanguageRegistry {
76 languages: Vec<Arc<Language>>,
77}
78
79impl LanguageRegistry {
80 pub fn new() -> Self {
81 Self::default()
82 }
83
84 pub fn add(&mut self, language: Arc<Language>) {
85 self.languages.push(language);
86 }
87
88 pub fn set_theme(&self, theme: &SyntaxTheme) {
89 for language in &self.languages {
90 language.set_theme(theme);
91 }
92 }
93
94 pub fn get_language(&self, name: &str) -> Option<&Arc<Language>> {
95 self.languages
96 .iter()
97 .find(|language| language.name() == name)
98 }
99
100 pub fn select_language(&self, path: impl AsRef<Path>) -> Option<&Arc<Language>> {
101 let path = path.as_ref();
102 let filename = path.file_name().and_then(|name| name.to_str());
103 let extension = path.extension().and_then(|name| name.to_str());
104 let path_suffixes = [extension, filename];
105 self.languages.iter().find(|language| {
106 language
107 .config
108 .path_suffixes
109 .iter()
110 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())))
111 })
112 }
113}
114
115impl Language {
116 pub fn new(config: LanguageConfig, ts_language: Option<tree_sitter::Language>) -> Self {
117 Self {
118 config,
119 grammar: ts_language.map(|ts_language| {
120 Arc::new(Grammar {
121 brackets_query: Query::new(ts_language, "").unwrap(),
122 highlights_query: Query::new(ts_language, "").unwrap(),
123 indents_query: Query::new(ts_language, "").unwrap(),
124 ts_language,
125 highlight_map: Default::default(),
126 })
127 }),
128 }
129 }
130
131 pub fn with_highlights_query(mut self, source: &str) -> Result<Self> {
132 let grammar = self
133 .grammar
134 .as_mut()
135 .and_then(Arc::get_mut)
136 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
137 grammar.highlights_query = Query::new(grammar.ts_language, source)?;
138 Ok(self)
139 }
140
141 pub fn with_brackets_query(mut self, source: &str) -> Result<Self> {
142 let grammar = self
143 .grammar
144 .as_mut()
145 .and_then(Arc::get_mut)
146 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
147 grammar.brackets_query = Query::new(grammar.ts_language, source)?;
148 Ok(self)
149 }
150
151 pub fn with_indents_query(mut self, source: &str) -> Result<Self> {
152 let grammar = self
153 .grammar
154 .as_mut()
155 .and_then(Arc::get_mut)
156 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
157 grammar.indents_query = Query::new(grammar.ts_language, source)?;
158 Ok(self)
159 }
160
161 pub fn name(&self) -> &str {
162 self.config.name.as_str()
163 }
164
165 pub fn line_comment_prefix(&self) -> Option<&str> {
166 self.config.line_comment.as_deref()
167 }
168
169 pub fn start_server(
170 &self,
171 root_path: &Path,
172 cx: &AppContext,
173 ) -> Result<Option<Arc<lsp::LanguageServer>>> {
174 if let Some(config) = &self.config.language_server {
175 #[cfg(any(test, feature = "test-support"))]
176 if let Some((server, started)) = &config.fake_server {
177 started.store(true, std::sync::atomic::Ordering::SeqCst);
178 return Ok(Some(server.clone()));
179 }
180
181 const ZED_BUNDLE: Option<&'static str> = option_env!("ZED_BUNDLE");
182 let binary_path = if ZED_BUNDLE.map_or(Ok(false), |b| b.parse())? {
183 cx.platform()
184 .path_for_resource(Some(&config.binary), None)?
185 } else {
186 Path::new(&config.binary).to_path_buf()
187 };
188 lsp::LanguageServer::new(&binary_path, root_path, cx.background().clone()).map(Some)
189 } else {
190 Ok(None)
191 }
192 }
193
194 pub fn disk_based_diagnostic_sources(&self) -> Option<&HashSet<String>> {
195 self.config
196 .language_server
197 .as_ref()
198 .map(|config| &config.disk_based_diagnostic_sources)
199 }
200
201 pub fn brackets(&self) -> &[BracketPair] {
202 &self.config.brackets
203 }
204
205 pub fn set_theme(&self, theme: &SyntaxTheme) {
206 if let Some(grammar) = self.grammar.as_ref() {
207 *grammar.highlight_map.lock() =
208 HighlightMap::new(grammar.highlights_query.capture_names(), theme);
209 }
210 }
211}
212
213impl Grammar {
214 pub fn highlight_map(&self) -> HighlightMap {
215 self.highlight_map.lock().clone()
216 }
217}
218
219#[cfg(any(test, feature = "test-support"))]
220impl LanguageServerConfig {
221 pub async fn fake(
222 executor: Arc<gpui::executor::Background>,
223 ) -> (Self, lsp::FakeLanguageServer) {
224 let (server, fake) = lsp::LanguageServer::fake(executor).await;
225 fake.started
226 .store(false, std::sync::atomic::Ordering::SeqCst);
227 let started = fake.started.clone();
228 (
229 Self {
230 fake_server: Some((server, started)),
231 ..Default::default()
232 },
233 fake,
234 )
235 }
236}