oak_prolog/
lsp.rs

1use crate::{kind::PrologSyntaxKind, language::PrologLanguage};
2use core::range::Range;
3use oak_core::tree::RedNode;
4use oak_hover::{Hover, HoverProvider};
5use oak_lsp::service::LanguageService;
6use oak_vfs::Vfs;
7use std::future::Future;
8
9/// Hover provider implementation for Prolog.
10pub struct PrologHoverProvider;
11
12impl HoverProvider<PrologLanguage> for PrologHoverProvider {
13    fn hover(&self, node: &RedNode<'_, PrologLanguage>, _range: Range<usize>) -> Option<Hover> {
14        let kind = node.green.kind;
15
16        let contents = match kind {
17            PrologSyntaxKind::Clause => "### Prolog Clause\nA statement that is either a fact or a rule.",
18            PrologSyntaxKind::Directive => "### Prolog Directive\nA command to the Prolog system.",
19            PrologSyntaxKind::Query => "### Prolog Query\nA goal to be proven by the Prolog system.",
20            _ => return None,
21        };
22
23        Some(Hover { contents: contents.to_string(), range: Some(node.span()) })
24    }
25}
26
27/// Language service implementation for Prolog.
28pub struct PrologLanguageService<V: Vfs> {
29    vfs: V,
30    workspace: oak_lsp::workspace::WorkspaceManager,
31    hover_provider: PrologHoverProvider,
32}
33
34impl<V: Vfs> PrologLanguageService<V> {
35    pub fn new(vfs: V) -> Self {
36        Self { vfs, workspace: oak_lsp::workspace::WorkspaceManager::default(), hover_provider: PrologHoverProvider }
37    }
38}
39
40impl<V: Vfs + Send + Sync + 'static + oak_vfs::WritableVfs> LanguageService for PrologLanguageService<V> {
41    type Lang = PrologLanguage;
42    type Vfs = V;
43
44    fn vfs(&self) -> &Self::Vfs {
45        &self.vfs
46    }
47
48    fn workspace(&self) -> &oak_lsp::workspace::WorkspaceManager {
49        &self.workspace
50    }
51
52    fn get_root(&self, _uri: &str) -> impl Future<Output = Option<RedNode<'_, PrologLanguage>>> + Send + '_ {
53        async move { None }
54    }
55
56    fn hover(&self, uri: &str, range: Range<usize>) -> impl Future<Output = Option<oak_lsp::Hover>> + Send + '_ {
57        let uri = uri.to_string();
58        async move {
59            let hover = self.with_root(&uri, |root| self.hover_provider.hover(&root, range)).await.flatten()?;
60            Some(oak_lsp::Hover { contents: hover.contents, range: hover.range })
61        }
62    }
63}
oak_prolog/lsp.rs

oak_prolog/
lsp.rs
