1use anyhow::{anyhow, Result};
2use async_trait::async_trait;
3use collections::HashMap;
4use futures::StreamExt;
5use gpui::AsyncAppContext;
6use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
7use lsp::LanguageServerBinary;
8use node_runtime::NodeRuntime;
9use project::project_settings::ProjectSettings;
10use serde_json::{json, Value};
11use settings::Settings;
12use smol::fs;
13use std::{
14 any::Any,
15 ffi::OsString,
16 path::{Path, PathBuf},
17 sync::Arc,
18};
19use util::{maybe, ResultExt};
20
21const SERVER_PATH: &str = "node_modules/.bin/tailwindcss-language-server";
22
23fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
24 vec![server_path.into(), "--stdio".into()]
25}
26
27pub struct TailwindLspAdapter {
28 node: Arc<dyn NodeRuntime>,
29}
30
31impl TailwindLspAdapter {
32 const SERVER_NAME: &'static str = "tailwindcss-language-server";
33
34 pub fn new(node: Arc<dyn NodeRuntime>) -> Self {
35 TailwindLspAdapter { node }
36 }
37}
38
39#[async_trait(?Send)]
40impl LspAdapter for TailwindLspAdapter {
41 fn name(&self) -> LanguageServerName {
42 LanguageServerName(Self::SERVER_NAME.into())
43 }
44
45 async fn fetch_latest_server_version(
46 &self,
47 _: &dyn LspAdapterDelegate,
48 ) -> Result<Box<dyn 'static + Any + Send>> {
49 Ok(Box::new(
50 self.node
51 .npm_package_latest_version("@tailwindcss/language-server")
52 .await?,
53 ) as Box<_>)
54 }
55
56 async fn fetch_server_binary(
57 &self,
58 latest_version: Box<dyn 'static + Send + Any>,
59 container_dir: PathBuf,
60 _: &dyn LspAdapterDelegate,
61 ) -> Result<LanguageServerBinary> {
62 let latest_version = latest_version.downcast::<String>().unwrap();
63 let server_path = container_dir.join(SERVER_PATH);
64 let package_name = "@tailwindcss/language-server";
65
66 let should_install_language_server = self
67 .node
68 .should_install_npm_package(package_name, &server_path, &container_dir, &latest_version)
69 .await;
70
71 if should_install_language_server {
72 self.node
73 .npm_install_packages(&container_dir, &[(package_name, latest_version.as_str())])
74 .await?;
75 }
76
77 Ok(LanguageServerBinary {
78 path: self.node.binary_path().await?,
79 env: None,
80 arguments: server_binary_arguments(&server_path),
81 })
82 }
83
84 async fn cached_server_binary(
85 &self,
86 container_dir: PathBuf,
87 _: &dyn LspAdapterDelegate,
88 ) -> Option<LanguageServerBinary> {
89 get_cached_server_binary(container_dir, &*self.node).await
90 }
91
92 async fn installation_test_binary(
93 &self,
94 container_dir: PathBuf,
95 ) -> Option<LanguageServerBinary> {
96 get_cached_server_binary(container_dir, &*self.node).await
97 }
98
99 async fn initialization_options(
100 self: Arc<Self>,
101 _: &Arc<dyn LspAdapterDelegate>,
102 ) -> Result<Option<serde_json::Value>> {
103 Ok(Some(json!({
104 "provideFormatter": true,
105 "userLanguages": {
106 "html": "html",
107 "css": "css",
108 "javascript": "javascript",
109 "typescriptreact": "typescriptreact",
110 },
111 })))
112 }
113
114 async fn workspace_configuration(
115 self: Arc<Self>,
116 _: &Arc<dyn LspAdapterDelegate>,
117 cx: &mut AsyncAppContext,
118 ) -> Result<Value> {
119 let tailwind_user_settings = cx.update(|cx| {
120 ProjectSettings::get_global(cx)
121 .lsp
122 .get(Self::SERVER_NAME)
123 .and_then(|s| s.settings.clone())
124 .unwrap_or_default()
125 })?;
126
127 // We need to set this to null if it's not set, because tailwindcss-languageserver
128 // will check whether it's an object and if it is (even if it's empty) it will
129 // ignore the `userLanguages` from the initialization options.
130 let include_languages = tailwind_user_settings
131 .get("includeLanguages")
132 .cloned()
133 .unwrap_or(Value::Null);
134
135 let experimental = tailwind_user_settings
136 .get("experimental")
137 .cloned()
138 .unwrap_or_else(|| json!([]));
139
140 Ok(json!({
141 "tailwindCSS": {
142 "emmetCompletions": true,
143 "includeLanguages": include_languages,
144 "experimental": experimental,
145 }
146 }))
147 }
148
149 fn language_ids(&self) -> HashMap<String, String> {
150 HashMap::from_iter([
151 ("Astro".to_string(), "astro".to_string()),
152 ("HTML".to_string(), "html".to_string()),
153 ("CSS".to_string(), "css".to_string()),
154 ("JavaScript".to_string(), "javascript".to_string()),
155 ("TSX".to_string(), "typescriptreact".to_string()),
156 ("Svelte".to_string(), "svelte".to_string()),
157 ("Elixir".to_string(), "phoenix-heex".to_string()),
158 ("HEEX".to_string(), "phoenix-heex".to_string()),
159 ("ERB".to_string(), "erb".to_string()),
160 ("PHP".to_string(), "php".to_string()),
161 ("Vue.js".to_string(), "vue".to_string()),
162 ])
163 }
164}
165
166async fn get_cached_server_binary(
167 container_dir: PathBuf,
168 node: &dyn NodeRuntime,
169) -> Option<LanguageServerBinary> {
170 maybe!(async {
171 let mut last_version_dir = None;
172 let mut entries = fs::read_dir(&container_dir).await?;
173 while let Some(entry) = entries.next().await {
174 let entry = entry?;
175 if entry.file_type().await?.is_dir() {
176 last_version_dir = Some(entry.path());
177 }
178 }
179 let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
180 let server_path = last_version_dir.join(SERVER_PATH);
181 if server_path.exists() {
182 Ok(LanguageServerBinary {
183 path: node.binary_path().await?,
184 env: None,
185 arguments: server_binary_arguments(&server_path),
186 })
187 } else {
188 Err(anyhow!(
189 "missing executable in directory {:?}",
190 last_version_dir
191 ))
192 }
193 })
194 .await
195 .log_err()
196}