oak_coq/
lsp.rs

1use crate::{CoqLanguage, kind::CoqSyntaxKind};
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 Coq.
10pub struct CoqHoverProvider;
11
12impl HoverProvider<CoqLanguage> for CoqHoverProvider {
13    fn hover(&self, node: &RedNode<CoqLanguage>, _range: Range<usize>) -> Option<Hover> {
14        let kind = node.green.kind;
15
16        // Provide context-aware hover information
17        let contents = match kind {
18            CoqSyntaxKind::Declaration => "### Coq Declaration\nDefines a new term, theorem, or inductive type.",
19            CoqSyntaxKind::Statement => "### Coq Statement\nA vernacular command or tactic.",
20            CoqSyntaxKind::Expression => "### Coq Expression\nA Coq term or type.",
21            _ => return None,
22        };
23
24        Some(Hover { contents: contents.to_string(), range: Some(node.span()) })
25    }
26}
27
28/// Language service implementation for Coq.
29pub struct CoqLanguageService<V: Vfs> {
30    vfs: V,
31    workspace: oak_lsp::workspace::WorkspaceManager,
32    hover_provider: CoqHoverProvider,
33}
34
35impl<V: Vfs> CoqLanguageService<V> {
36    /// Creates a new `CoqLanguageService`.
37    pub fn new(vfs: V) -> Self {
38        Self { vfs, workspace: oak_lsp::workspace::WorkspaceManager::default(), hover_provider: CoqHoverProvider }
39    }
40}
41
42impl<V: Vfs + Send + Sync + 'static + oak_vfs::WritableVfs> LanguageService for CoqLanguageService<V> {
43    type Lang = CoqLanguage;
44    type Vfs = V;
45
46    fn vfs(&self) -> &Self::Vfs {
47        &self.vfs
48    }
49
50    fn workspace(&self) -> &oak_lsp::workspace::WorkspaceManager {
51        &self.workspace
52    }
53
54    fn get_root(&self, uri: &str) -> impl Future<Output = Option<RedNode<'_, CoqLanguage>>> + Send + '_ {
55        let source = self.vfs().get_source(uri);
56        async move {
57            let source = source?;
58            let language = CoqLanguage::default();
59            let parser = crate::parser::CoqParser::new(&language);
60            let lexer = crate::lexer::CoqLexer::new(&language);
61
62            let mut cache = Box::new(oak_core::parser::session::ParseSession::<CoqLanguage>::default());
63            let cache_ptr: *mut oak_core::parser::session::ParseSession<CoqLanguage> = &mut *cache;
64
65            let parse_out = oak_core::parser::parse(&parser, &lexer, &source, &[], unsafe { &mut *cache_ptr });
66            let green = parse_out.result.ok()?;
67
68            let _leaked_cache = Box::leak(cache);
69            let green_static: &'static oak_core::GreenNode<CoqLanguage> = unsafe { std::mem::transmute(green) };
70
71            Some(RedNode::new(green_static, 0))
72        }
73    }
74
75    fn hover(&self, uri: &str, range: Range<usize>) -> impl Future<Output = Option<oak_lsp::Hover>> + Send + '_ {
76        let uri = uri.to_string();
77        async move { self.with_root(&uri, |root| self.hover_provider.hover(&root, range).map(|h| oak_lsp::Hover { contents: h.contents, range: h.range })).await.flatten() }
78    }
79}
oak_coq/lsp.rs

oak_coq/
lsp.rs
