1use std::{env, fs};
2use zed::lsp::{Completion, CompletionKind};
3use zed::CodeLabelSpan;
4use zed_extension_api::{self as zed, serde_json, Result};
5
6struct VueExtension {
7 did_find_server: bool,
8}
9
10const SERVER_PATH: &str = "node_modules/@vue/language-server/bin/vue-language-server.js";
11const PACKAGE_NAME: &str = "@vue/language-server";
12
13impl VueExtension {
14 fn server_exists(&self) -> bool {
15 fs::metadata(SERVER_PATH).map_or(false, |stat| stat.is_file())
16 }
17
18 fn server_script_path(&mut self, id: &zed::LanguageServerId) -> Result<String> {
19 let server_exists = self.server_exists();
20 if self.did_find_server && server_exists {
21 return Ok(SERVER_PATH.to_string());
22 }
23
24 zed::set_language_server_installation_status(
25 id,
26 &zed::LanguageServerInstallationStatus::CheckingForUpdate,
27 );
28 // We hardcode the version to 1.8 since we do not support @vue/language-server 2.0 yet.
29 let version = "1.8".to_string();
30
31 if !server_exists
32 || zed::npm_package_installed_version(PACKAGE_NAME)?.as_ref() != Some(&version)
33 {
34 zed::set_language_server_installation_status(
35 id,
36 &zed::LanguageServerInstallationStatus::Downloading,
37 );
38 let result = zed::npm_install_package(PACKAGE_NAME, &version);
39 match result {
40 Ok(()) => {
41 if !self.server_exists() {
42 Err(format!(
43 "installed package '{PACKAGE_NAME}' did not contain expected path '{SERVER_PATH}'",
44 ))?;
45 }
46 }
47 Err(error) => {
48 if !self.server_exists() {
49 Err(error)?;
50 }
51 }
52 }
53 }
54
55 self.did_find_server = true;
56 Ok(SERVER_PATH.to_string())
57 }
58}
59
60impl zed::Extension for VueExtension {
61 fn new() -> Self {
62 Self {
63 did_find_server: false,
64 }
65 }
66
67 fn language_server_command(
68 &mut self,
69 id: &zed::LanguageServerId,
70 _: &zed::Worktree,
71 ) -> Result<zed::Command> {
72 let server_path = self.server_script_path(id)?;
73 Ok(zed::Command {
74 command: zed::node_binary_path()?,
75 args: vec![
76 env::current_dir()
77 .unwrap()
78 .join(&server_path)
79 .to_string_lossy()
80 .to_string(),
81 "--stdio".to_string(),
82 ],
83 env: Default::default(),
84 })
85 }
86
87 fn language_server_initialization_options(
88 &mut self,
89 _: &zed::LanguageServerId,
90 _: &zed::Worktree,
91 ) -> Result<Option<serde_json::Value>> {
92 Ok(Some(serde_json::json!({
93 "typescript": {
94 "tsdk": "node_modules/typescript/lib"
95 }
96 })))
97 }
98
99 fn label_for_completion(
100 &self,
101 _language_server_id: &zed::LanguageServerId,
102 completion: Completion,
103 ) -> Option<zed::CodeLabel> {
104 let highlight_name = match completion.kind? {
105 CompletionKind::Class | CompletionKind::Interface => "type",
106 CompletionKind::Constructor => "type",
107 CompletionKind::Constant => "constant",
108 CompletionKind::Function | CompletionKind::Method => "function",
109 CompletionKind::Property | CompletionKind::Field => "tag",
110 CompletionKind::Variable => "type",
111 CompletionKind::Keyword => "keyword",
112 CompletionKind::Value => "tag",
113 _ => return None,
114 };
115
116 let len = completion.label.len();
117 let name_span = CodeLabelSpan::literal(completion.label, Some(highlight_name.to_string()));
118
119 Some(zed::CodeLabel {
120 code: Default::default(),
121 spans: if let Some(detail) = completion.detail {
122 vec![
123 name_span,
124 CodeLabelSpan::literal(" ", None),
125 CodeLabelSpan::literal(detail, None),
126 ]
127 } else {
128 vec![name_span]
129 },
130 filter_range: (0..len).into(),
131 })
132 }
133}
134
135zed::register_extension!(VueExtension);