1mod buffer;
2mod diagnostic_set;
3mod highlight_map;
4pub mod multi_buffer;
5pub mod proto;
6#[cfg(test)]
7mod tests;
8
9use anyhow::{anyhow, Result};
10pub use buffer::Operation;
11pub use buffer::*;
12pub use diagnostic_set::DiagnosticEntry;
13use gpui::{executor::Background, AppContext};
14use highlight_map::HighlightMap;
15use lazy_static::lazy_static;
16use lsp::LanguageServer;
17pub use multi_buffer::MultiBuffer;
18use parking_lot::Mutex;
19use serde::Deserialize;
20use std::{collections::HashSet, path::Path, str, sync::Arc};
21use theme::SyntaxTheme;
22use tree_sitter::{self, Query};
23pub use tree_sitter::{Parser, Tree};
24
25lazy_static! {
26 pub static ref PLAIN_TEXT: Arc<Language> = Arc::new(Language::new(
27 LanguageConfig {
28 name: "Plain Text".to_string(),
29 path_suffixes: Default::default(),
30 brackets: Default::default(),
31 line_comment: None,
32 language_server: None,
33 },
34 None,
35 ));
36}
37
38#[derive(Default, Deserialize)]
39pub struct LanguageConfig {
40 pub name: String,
41 pub path_suffixes: Vec<String>,
42 pub brackets: Vec<BracketPair>,
43 pub line_comment: Option<String>,
44 pub language_server: Option<LanguageServerConfig>,
45}
46
47#[derive(Default, Deserialize)]
48pub struct LanguageServerConfig {
49 pub binary: String,
50 pub disk_based_diagnostic_sources: HashSet<String>,
51 #[cfg(any(test, feature = "test-support"))]
52 #[serde(skip)]
53 pub fake_server: Option<(Arc<LanguageServer>, Arc<std::sync::atomic::AtomicBool>)>,
54}
55
56#[derive(Clone, Debug, Deserialize)]
57pub struct BracketPair {
58 pub start: String,
59 pub end: String,
60 pub close: bool,
61 pub newline: bool,
62}
63
64pub struct Language {
65 pub(crate) config: LanguageConfig,
66 pub(crate) grammar: Option<Arc<Grammar>>,
67}
68
69pub struct Grammar {
70 pub(crate) ts_language: tree_sitter::Language,
71 pub(crate) highlights_query: Query,
72 pub(crate) brackets_query: Query,
73 pub(crate) indents_query: Query,
74 pub(crate) highlight_map: Mutex<HighlightMap>,
75}
76
77#[derive(Default)]
78pub struct LanguageRegistry {
79 languages: Vec<Arc<Language>>,
80}
81
82impl LanguageRegistry {
83 pub fn new() -> Self {
84 Self::default()
85 }
86
87 pub fn add(&mut self, language: Arc<Language>) {
88 self.languages.push(language);
89 }
90
91 pub fn set_theme(&self, theme: &SyntaxTheme) {
92 for language in &self.languages {
93 language.set_theme(theme);
94 }
95 }
96
97 pub fn get_language(&self, name: &str) -> Option<&Arc<Language>> {
98 self.languages
99 .iter()
100 .find(|language| language.name() == name)
101 }
102
103 pub fn select_language(&self, path: impl AsRef<Path>) -> Option<&Arc<Language>> {
104 let path = path.as_ref();
105 let filename = path.file_name().and_then(|name| name.to_str());
106 let extension = path.extension().and_then(|name| name.to_str());
107 let path_suffixes = [extension, filename];
108 self.languages.iter().find(|language| {
109 language
110 .config
111 .path_suffixes
112 .iter()
113 .any(|suffix| path_suffixes.contains(&Some(suffix.as_str())))
114 })
115 }
116}
117
118impl Language {
119 pub fn new(config: LanguageConfig, ts_language: Option<tree_sitter::Language>) -> Self {
120 Self {
121 config,
122 grammar: ts_language.map(|ts_language| {
123 Arc::new(Grammar {
124 brackets_query: Query::new(ts_language, "").unwrap(),
125 highlights_query: Query::new(ts_language, "").unwrap(),
126 indents_query: Query::new(ts_language, "").unwrap(),
127 ts_language,
128 highlight_map: Default::default(),
129 })
130 }),
131 }
132 }
133
134 pub fn with_highlights_query(mut self, source: &str) -> Result<Self> {
135 let grammar = self
136 .grammar
137 .as_mut()
138 .and_then(Arc::get_mut)
139 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
140 grammar.highlights_query = Query::new(grammar.ts_language, source)?;
141 Ok(self)
142 }
143
144 pub fn with_brackets_query(mut self, source: &str) -> Result<Self> {
145 let grammar = self
146 .grammar
147 .as_mut()
148 .and_then(Arc::get_mut)
149 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
150 grammar.brackets_query = Query::new(grammar.ts_language, source)?;
151 Ok(self)
152 }
153
154 pub fn with_indents_query(mut self, source: &str) -> Result<Self> {
155 let grammar = self
156 .grammar
157 .as_mut()
158 .and_then(Arc::get_mut)
159 .ok_or_else(|| anyhow!("grammar does not exist or is already being used"))?;
160 grammar.indents_query = Query::new(grammar.ts_language, source)?;
161 Ok(self)
162 }
163
164 pub fn name(&self) -> &str {
165 self.config.name.as_str()
166 }
167
168 pub fn line_comment_prefix(&self) -> Option<&str> {
169 self.config.line_comment.as_deref()
170 }
171
172 pub fn start_server(
173 &self,
174 root_path: &Path,
175 cx: &AppContext,
176 ) -> Result<Option<Arc<lsp::LanguageServer>>> {
177 if let Some(config) = &self.config.language_server {
178 #[cfg(any(test, feature = "test-support"))]
179 if let Some((server, started)) = &config.fake_server {
180 started.store(true, std::sync::atomic::Ordering::SeqCst);
181 return Ok(Some(server.clone()));
182 }
183
184 const ZED_BUNDLE: Option<&'static str> = option_env!("ZED_BUNDLE");
185 let binary_path = if ZED_BUNDLE.map_or(Ok(false), |b| b.parse())? {
186 cx.platform()
187 .path_for_resource(Some(&config.binary), None)?
188 } else {
189 Path::new(&config.binary).to_path_buf()
190 };
191 lsp::LanguageServer::new(&binary_path, root_path, cx.background().clone()).map(Some)
192 } else {
193 Ok(None)
194 }
195 }
196
197 pub fn disk_based_diagnostic_sources(&self) -> Option<&HashSet<String>> {
198 self.config
199 .language_server
200 .as_ref()
201 .map(|config| &config.disk_based_diagnostic_sources)
202 }
203
204 pub fn brackets(&self) -> &[BracketPair] {
205 &self.config.brackets
206 }
207
208 pub fn set_theme(&self, theme: &SyntaxTheme) {
209 if let Some(grammar) = self.grammar.as_ref() {
210 *grammar.highlight_map.lock() =
211 HighlightMap::new(grammar.highlights_query.capture_names(), theme);
212 }
213 }
214}
215
216impl Grammar {
217 pub fn highlight_map(&self) -> HighlightMap {
218 self.highlight_map.lock().clone()
219 }
220}
221
222#[cfg(any(test, feature = "test-support"))]
223impl LanguageServerConfig {
224 pub async fn fake(executor: Arc<Background>) -> (Self, lsp::FakeLanguageServer) {
225 let (server, fake) = lsp::LanguageServer::fake(executor).await;
226 fake.started
227 .store(false, std::sync::atomic::Ordering::SeqCst);
228 let started = fake.started.clone();
229 (
230 Self {
231 fake_server: Some((server, started)),
232 ..Default::default()
233 },
234 fake,
235 )
236 }
237}