oak_rust/
lsp.rs

1use crate::{RustLanguage, parser::RustElementType};
2use core::range::Range;
3use futures::Future;
4use oak_core::tree::RedNode;
5use oak_hover::{Hover, HoverProvider};
6use oak_lsp::service::LanguageService;
7use oak_vfs::Vfs;
8
9/// Hover provider implementation for Rust.
10pub struct RustHoverProvider;
11
12impl HoverProvider<RustLanguage> for RustHoverProvider {
13    fn hover(&self, node: &RedNode<RustLanguage>, _range: Range<usize>) -> Option<Hover> {
14        let kind = node.green.kind;
15
16        // Provide context-aware hover information
17        let contents = match kind {
18            RustElementType::Function => "### Rust Function\nDefines a callable block of code.",
19            RustElementType::StructItem => "### Rust Struct\nDefines a custom data type.",
20            RustElementType::ModuleItem => "### Rust Module\nOrganizes code into namespaces.",
21            RustElementType::Trait => "### Rust Trait\nDefines a shared behavior.",
22            _ => return None,
23        };
24
25        Some(Hover { contents: contents.to_string(), range: Some(node.span()) })
26    }
27}
28
29/// Language service implementation for Rust.
30pub struct RustLanguageService<V: Vfs> {
31    vfs: V,
32    workspace: oak_lsp::workspace::WorkspaceManager,
33    hover_provider: RustHoverProvider,
34}
35
36impl<V: Vfs> RustLanguageService<V> {
37    /// Creates a new `RustLanguageService`.
38    pub fn new(vfs: V) -> Self {
39        Self { vfs, workspace: oak_lsp::workspace::WorkspaceManager::default(), hover_provider: RustHoverProvider }
40    }
41}
42
43impl<V: Vfs + Send + Sync + 'static + oak_vfs::WritableVfs> LanguageService for RustLanguageService<V> {
44    type Lang = RustLanguage;
45    type Vfs = V;
46
47    fn vfs(&self) -> &Self::Vfs {
48        &self.vfs
49    }
50
51    fn workspace(&self) -> &oak_lsp::workspace::WorkspaceManager {
52        &self.workspace
53    }
54
55    fn get_root(&self, uri: &str) -> impl Future<Output = Option<RedNode<'_, RustLanguage>>> + Send + '_ {
56        let source = self.vfs().get_source(uri);
57        async move {
58            let source = source?;
59            let language = RustLanguage::default();
60            let parser = crate::parser::RustParser::new(&language);
61            let lexer = crate::lexer::RustLexer::new(&language);
62
63            // In a real implementation, you would use a cache
64            let mut cache = oak_core::parser::session::ParseSession::<RustLanguage>::default();
65            let _output = oak_core::parser::parse(&parser, &lexer, &source, &[], &mut cache);
66            // Convert GreenNode to RedNode
67            // NOTE: This is a temporary hack because RedNode requires a reference to GreenNode
68            // which is owned by output. In a real implementation, the cache or workspace
69            // would own the GreenNode.
70            None
71        }
72    }
73
74    fn hover(&self, uri: &str, range: Range<usize>) -> impl Future<Output = Option<oak_lsp::Hover>> + Send + '_ {
75        let uri = uri.to_string();
76        async move {
77            self.with_root(&uri, |root| {
78                // In a real implementation, you would find the specific node at offset
79                // For this example, we just check the root or simple children
80                self.hover_provider.hover(&root, range).map(|h| oak_lsp::Hover { contents: h.contents, range: h.range })
81            })
82            .await
83            .flatten()
84        }
85    }
86}
oak_rust/lsp.rs

oak_rust/
lsp.rs
