1use anyhow::{anyhow, Result};
2use async_trait::async_trait;
3use collections::HashMap;
4use futures::StreamExt;
5use gpui::AsyncApp;
6use language::{LanguageToolchainStore, LspAdapter, LspAdapterDelegate};
7use lsp::{LanguageServerBinary, LanguageServerName};
8use node_runtime::NodeRuntime;
9use project::{lsp_store::language_server_settings, Fs};
10use serde_json::{json, Value};
11use smol::fs;
12use std::{
13 any::Any,
14 ffi::OsString,
15 path::{Path, PathBuf},
16 sync::Arc,
17};
18use util::{maybe, ResultExt};
19
20#[cfg(target_os = "windows")]
21const SERVER_PATH: &str =
22 "node_modules/@tailwindcss/language-server/bin/tailwindcss-language-server";
23#[cfg(not(target_os = "windows"))]
24const SERVER_PATH: &str = "node_modules/.bin/tailwindcss-language-server";
25
26fn server_binary_arguments(server_path: &Path) -> Vec<OsString> {
27 vec![server_path.into(), "--stdio".into()]
28}
29
30pub struct TailwindLspAdapter {
31 node: NodeRuntime,
32}
33
34impl TailwindLspAdapter {
35 const SERVER_NAME: LanguageServerName =
36 LanguageServerName::new_static("tailwindcss-language-server");
37 const PACKAGE_NAME: &str = "@tailwindcss/language-server";
38
39 pub fn new(node: NodeRuntime) -> Self {
40 TailwindLspAdapter { node }
41 }
42}
43
44#[async_trait(?Send)]
45impl LspAdapter for TailwindLspAdapter {
46 fn name(&self) -> LanguageServerName {
47 Self::SERVER_NAME.clone()
48 }
49
50 async fn fetch_latest_server_version(
51 &self,
52 _: &dyn LspAdapterDelegate,
53 ) -> Result<Box<dyn 'static + Any + Send>> {
54 Ok(Box::new(
55 self.node
56 .npm_package_latest_version(Self::PACKAGE_NAME)
57 .await?,
58 ) as Box<_>)
59 }
60
61 async fn fetch_server_binary(
62 &self,
63 latest_version: Box<dyn 'static + Send + Any>,
64 container_dir: PathBuf,
65 _: &dyn LspAdapterDelegate,
66 ) -> Result<LanguageServerBinary> {
67 let latest_version = latest_version.downcast::<String>().unwrap();
68 let server_path = container_dir.join(SERVER_PATH);
69
70 self.node
71 .npm_install_packages(
72 &container_dir,
73 &[(Self::PACKAGE_NAME, latest_version.as_str())],
74 )
75 .await?;
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 check_if_version_installed(
85 &self,
86 version: &(dyn 'static + Send + Any),
87 container_dir: &PathBuf,
88 _: &dyn LspAdapterDelegate,
89 ) -> Option<LanguageServerBinary> {
90 let version = version.downcast_ref::<String>().unwrap();
91 let server_path = container_dir.join(SERVER_PATH);
92
93 let should_install_language_server = self
94 .node
95 .should_install_npm_package(Self::PACKAGE_NAME, &server_path, &container_dir, &version)
96 .await;
97
98 if should_install_language_server {
99 None
100 } else {
101 Some(LanguageServerBinary {
102 path: self.node.binary_path().await.ok()?,
103 env: None,
104 arguments: server_binary_arguments(&server_path),
105 })
106 }
107 }
108
109 async fn cached_server_binary(
110 &self,
111 container_dir: PathBuf,
112 _: &dyn LspAdapterDelegate,
113 ) -> Option<LanguageServerBinary> {
114 get_cached_server_binary(container_dir, &self.node).await
115 }
116
117 async fn initialization_options(
118 self: Arc<Self>,
119 _: &dyn Fs,
120 _: &Arc<dyn LspAdapterDelegate>,
121 ) -> Result<Option<serde_json::Value>> {
122 Ok(Some(json!({
123 "provideFormatter": true,
124 "userLanguages": {
125 "html": "html",
126 "css": "css",
127 "javascript": "javascript",
128 "typescriptreact": "typescriptreact",
129 },
130 })))
131 }
132
133 async fn workspace_configuration(
134 self: Arc<Self>,
135 _: &dyn Fs,
136 delegate: &Arc<dyn LspAdapterDelegate>,
137 _: Arc<dyn LanguageToolchainStore>,
138 cx: &mut AsyncApp,
139 ) -> Result<Value> {
140 let mut tailwind_user_settings = cx.update(|cx| {
141 language_server_settings(delegate.as_ref(), &Self::SERVER_NAME, cx)
142 .and_then(|s| s.settings.clone())
143 .unwrap_or_default()
144 })?;
145
146 if tailwind_user_settings.get("emmetCompletions").is_none() {
147 tailwind_user_settings["emmetCompletions"] = Value::Bool(true);
148 }
149
150 Ok(json!({
151 "tailwindCSS": tailwind_user_settings,
152 }))
153 }
154
155 fn language_ids(&self) -> HashMap<String, String> {
156 HashMap::from_iter([
157 ("Astro".to_string(), "astro".to_string()),
158 ("HTML".to_string(), "html".to_string()),
159 ("CSS".to_string(), "css".to_string()),
160 ("JavaScript".to_string(), "javascript".to_string()),
161 ("TSX".to_string(), "typescriptreact".to_string()),
162 ("Svelte".to_string(), "svelte".to_string()),
163 ("Elixir".to_string(), "phoenix-heex".to_string()),
164 ("HEEX".to_string(), "phoenix-heex".to_string()),
165 ("ERB".to_string(), "erb".to_string()),
166 ("PHP".to_string(), "php".to_string()),
167 ("Vue.js".to_string(), "vue".to_string()),
168 ])
169 }
170}
171
172async fn get_cached_server_binary(
173 container_dir: PathBuf,
174 node: &NodeRuntime,
175) -> Option<LanguageServerBinary> {
176 maybe!(async {
177 let mut last_version_dir = None;
178 let mut entries = fs::read_dir(&container_dir).await?;
179 while let Some(entry) = entries.next().await {
180 let entry = entry?;
181 if entry.file_type().await?.is_dir() {
182 last_version_dir = Some(entry.path());
183 }
184 }
185 let last_version_dir = last_version_dir.ok_or_else(|| anyhow!("no cached binary"))?;
186 let server_path = last_version_dir.join(SERVER_PATH);
187 if server_path.exists() {
188 Ok(LanguageServerBinary {
189 path: node.binary_path().await?,
190 env: None,
191 arguments: server_binary_arguments(&server_path),
192 })
193 } else {
194 Err(anyhow!(
195 "missing executable in directory {:?}",
196 last_version_dir
197 ))
198 }
199 })
200 .await
201 .log_err()
202}