1use anyhow::{anyhow, Context, Result};
2use async_trait::async_trait;
3use futures::StreamExt;
4pub use language::*;
5use lsp::LanguageServerBinary;
6use smol::fs::{self, File};
7use std::{any::Any, path::PathBuf, sync::Arc};
8use util::{
9 async_maybe,
10 fs::remove_matching,
11 github::{latest_github_release, GitHubLspBinaryVersion},
12 ResultExt,
13};
14
15pub struct CLspAdapter;
16
17#[async_trait]
18impl super::LspAdapter for CLspAdapter {
19 fn name(&self) -> LanguageServerName {
20 LanguageServerName("clangd".into())
21 }
22
23 fn short_name(&self) -> &'static str {
24 "clangd"
25 }
26
27 async fn fetch_latest_server_version(
28 &self,
29 delegate: &dyn LspAdapterDelegate,
30 ) -> Result<Box<dyn 'static + Send + Any>> {
31 let release =
32 latest_github_release("clangd/clangd", true, false, delegate.http_client()).await?;
33 let asset_name = format!("clangd-mac-{}.zip", release.tag_name);
34 let asset = release
35 .assets
36 .iter()
37 .find(|asset| asset.name == asset_name)
38 .ok_or_else(|| anyhow!("no asset found matching {:?}", asset_name))?;
39 let version = GitHubLspBinaryVersion {
40 name: release.tag_name,
41 url: asset.browser_download_url.clone(),
42 };
43 Ok(Box::new(version) as Box<_>)
44 }
45
46 async fn fetch_server_binary(
47 &self,
48 version: Box<dyn 'static + Send + Any>,
49 container_dir: PathBuf,
50 delegate: &dyn LspAdapterDelegate,
51 ) -> Result<LanguageServerBinary> {
52 let version = version.downcast::<GitHubLspBinaryVersion>().unwrap();
53 let zip_path = container_dir.join(format!("clangd_{}.zip", version.name));
54 let version_dir = container_dir.join(format!("clangd_{}", version.name));
55 let binary_path = version_dir.join("bin/clangd");
56
57 if fs::metadata(&binary_path).await.is_err() {
58 let mut response = delegate
59 .http_client()
60 .get(&version.url, Default::default(), true)
61 .await
62 .context("error downloading release")?;
63 let mut file = File::create(&zip_path).await?;
64 if !response.status().is_success() {
65 Err(anyhow!(
66 "download failed with status {}",
67 response.status().to_string()
68 ))?;
69 }
70 futures::io::copy(response.body_mut(), &mut file).await?;
71
72 let unzip_status = smol::process::Command::new("unzip")
73 .current_dir(&container_dir)
74 .arg(&zip_path)
75 .output()
76 .await?
77 .status;
78 if !unzip_status.success() {
79 Err(anyhow!("failed to unzip clangd archive"))?;
80 }
81
82 remove_matching(&container_dir, |entry| entry != version_dir).await;
83 }
84
85 Ok(LanguageServerBinary {
86 path: binary_path,
87 env: None,
88 arguments: vec![],
89 })
90 }
91
92 async fn cached_server_binary(
93 &self,
94 container_dir: PathBuf,
95 _: &dyn LspAdapterDelegate,
96 ) -> Option<LanguageServerBinary> {
97 get_cached_server_binary(container_dir).await
98 }
99
100 async fn installation_test_binary(
101 &self,
102 container_dir: PathBuf,
103 ) -> Option<LanguageServerBinary> {
104 get_cached_server_binary(container_dir)
105 .await
106 .map(|mut binary| {
107 binary.arguments = vec!["--help".into()];
108 binary
109 })
110 }
111
112 async fn label_for_completion(
113 &self,
114 completion: &lsp::CompletionItem,
115 language: &Arc<Language>,
116 ) -> Option<CodeLabel> {
117 let label = completion
118 .label
119 .strip_prefix('•')
120 .unwrap_or(&completion.label)
121 .trim();
122
123 match completion.kind {
124 Some(lsp::CompletionItemKind::FIELD) if completion.detail.is_some() => {
125 let detail = completion.detail.as_ref().unwrap();
126 let text = format!("{} {}", detail, label);
127 let source = Rope::from(format!("struct S {{ {} }}", text).as_str());
128 let runs = language.highlight_text(&source, 11..11 + text.len());
129 return Some(CodeLabel {
130 filter_range: detail.len() + 1..text.len(),
131 text,
132 runs,
133 });
134 }
135 Some(lsp::CompletionItemKind::CONSTANT | lsp::CompletionItemKind::VARIABLE)
136 if completion.detail.is_some() =>
137 {
138 let detail = completion.detail.as_ref().unwrap();
139 let text = format!("{} {}", detail, label);
140 let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
141 return Some(CodeLabel {
142 filter_range: detail.len() + 1..text.len(),
143 text,
144 runs,
145 });
146 }
147 Some(lsp::CompletionItemKind::FUNCTION | lsp::CompletionItemKind::METHOD)
148 if completion.detail.is_some() =>
149 {
150 let detail = completion.detail.as_ref().unwrap();
151 let text = format!("{} {}", detail, label);
152 let runs = language.highlight_text(&Rope::from(text.as_str()), 0..text.len());
153 return Some(CodeLabel {
154 filter_range: detail.len() + 1..text.rfind('(').unwrap_or(text.len()),
155 text,
156 runs,
157 });
158 }
159 Some(kind) => {
160 let highlight_name = match kind {
161 lsp::CompletionItemKind::STRUCT
162 | lsp::CompletionItemKind::INTERFACE
163 | lsp::CompletionItemKind::CLASS
164 | lsp::CompletionItemKind::ENUM => Some("type"),
165 lsp::CompletionItemKind::ENUM_MEMBER => Some("variant"),
166 lsp::CompletionItemKind::KEYWORD => Some("keyword"),
167 lsp::CompletionItemKind::VALUE | lsp::CompletionItemKind::CONSTANT => {
168 Some("constant")
169 }
170 _ => None,
171 };
172 if let Some(highlight_id) = language
173 .grammar()
174 .and_then(|g| g.highlight_id_for_name(highlight_name?))
175 {
176 let mut label = CodeLabel::plain(label.to_string(), None);
177 label.runs.push((
178 0..label.text.rfind('(').unwrap_or(label.text.len()),
179 highlight_id,
180 ));
181 return Some(label);
182 }
183 }
184 _ => {}
185 }
186 Some(CodeLabel::plain(label.to_string(), None))
187 }
188
189 async fn label_for_symbol(
190 &self,
191 name: &str,
192 kind: lsp::SymbolKind,
193 language: &Arc<Language>,
194 ) -> Option<CodeLabel> {
195 let (text, filter_range, display_range) = match kind {
196 lsp::SymbolKind::METHOD | lsp::SymbolKind::FUNCTION => {
197 let text = format!("void {} () {{}}", name);
198 let filter_range = 0..name.len();
199 let display_range = 5..5 + name.len();
200 (text, filter_range, display_range)
201 }
202 lsp::SymbolKind::STRUCT => {
203 let text = format!("struct {} {{}}", name);
204 let filter_range = 7..7 + name.len();
205 let display_range = 0..filter_range.end;
206 (text, filter_range, display_range)
207 }
208 lsp::SymbolKind::ENUM => {
209 let text = format!("enum {} {{}}", name);
210 let filter_range = 5..5 + name.len();
211 let display_range = 0..filter_range.end;
212 (text, filter_range, display_range)
213 }
214 lsp::SymbolKind::INTERFACE | lsp::SymbolKind::CLASS => {
215 let text = format!("class {} {{}}", name);
216 let filter_range = 6..6 + name.len();
217 let display_range = 0..filter_range.end;
218 (text, filter_range, display_range)
219 }
220 lsp::SymbolKind::CONSTANT => {
221 let text = format!("const int {} = 0;", name);
222 let filter_range = 10..10 + name.len();
223 let display_range = 0..filter_range.end;
224 (text, filter_range, display_range)
225 }
226 lsp::SymbolKind::MODULE => {
227 let text = format!("namespace {} {{}}", name);
228 let filter_range = 10..10 + name.len();
229 let display_range = 0..filter_range.end;
230 (text, filter_range, display_range)
231 }
232 lsp::SymbolKind::TYPE_PARAMETER => {
233 let text = format!("typename {} {{}};", name);
234 let filter_range = 9..9 + name.len();
235 let display_range = 0..filter_range.end;
236 (text, filter_range, display_range)
237 }
238 _ => return None,
239 };
240
241 Some(CodeLabel {
242 runs: language.highlight_text(&text.as_str().into(), display_range.clone()),
243 text: text[display_range].to_string(),
244 filter_range,
245 })
246 }
247}
248
249async fn get_cached_server_binary(container_dir: PathBuf) -> Option<LanguageServerBinary> {
250 async_maybe!({
251 let mut last_clangd_dir = None;
252 let mut entries = fs::read_dir(&container_dir).await?;
253 while let Some(entry) = entries.next().await {
254 let entry = entry?;
255 if entry.file_type().await?.is_dir() {
256 last_clangd_dir = Some(entry.path());
257 }
258 }
259 let clangd_dir = last_clangd_dir.ok_or_else(|| anyhow!("no cached binary"))?;
260 let clangd_bin = clangd_dir.join("bin/clangd");
261 if clangd_bin.exists() {
262 Ok(LanguageServerBinary {
263 path: clangd_bin,
264 env: None,
265 arguments: vec![],
266 })
267 } else {
268 Err(anyhow!(
269 "missing clangd binary in directory {:?}",
270 clangd_dir
271 ))
272 }
273 })
274 .await
275 .log_err()
276}
277
278#[cfg(test)]
279mod tests {
280 use gpui::{Context, TestAppContext};
281 use language::{language_settings::AllLanguageSettings, AutoindentMode, Buffer};
282 use settings::SettingsStore;
283 use std::num::NonZeroU32;
284 use text::BufferId;
285
286 #[gpui::test]
287 async fn test_c_autoindent(cx: &mut TestAppContext) {
288 // cx.executor().set_block_on_ticks(usize::MAX..=usize::MAX);
289 cx.update(|cx| {
290 let test_settings = SettingsStore::test(cx);
291 cx.set_global(test_settings);
292 language::init(cx);
293 cx.update_global::<SettingsStore, _>(|store, cx| {
294 store.update_user_settings::<AllLanguageSettings>(cx, |s| {
295 s.defaults.tab_size = NonZeroU32::new(2);
296 });
297 });
298 });
299 let language = crate::language("c", tree_sitter_c::language(), None).await;
300
301 cx.new_model(|cx| {
302 let mut buffer = Buffer::new(0, BufferId::new(cx.entity_id().as_u64()).unwrap(), "")
303 .with_language(language, cx);
304
305 // empty function
306 buffer.edit([(0..0, "int main() {}")], None, cx);
307
308 // indent inside braces
309 let ix = buffer.len() - 1;
310 buffer.edit([(ix..ix, "\n\n")], Some(AutoindentMode::EachLine), cx);
311 assert_eq!(buffer.text(), "int main() {\n \n}");
312
313 // indent body of single-statement if statement
314 let ix = buffer.len() - 2;
315 buffer.edit([(ix..ix, "if (a)\nb;")], Some(AutoindentMode::EachLine), cx);
316 assert_eq!(buffer.text(), "int main() {\n if (a)\n b;\n}");
317
318 // indent inside field expression
319 let ix = buffer.len() - 3;
320 buffer.edit([(ix..ix, "\n.c")], Some(AutoindentMode::EachLine), cx);
321 assert_eq!(buffer.text(), "int main() {\n if (a)\n b\n .c;\n}");
322
323 buffer
324 });
325 }
326}