oak_handlebars/
lsp.rs

1use crate::{HandlebarsLanguage, kind::HandlebarsSyntaxKind};
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 Handlebars.
10pub struct HandlebarsHoverProvider;
11
12impl HoverProvider<HandlebarsLanguage> for HandlebarsHoverProvider {
13    fn hover(&self, node: &RedNode<HandlebarsLanguage>, _range: Range<usize>) -> Option<Hover> {
14        let kind = node.green.kind;
15
16        // Provide context-aware hover information
17        let contents = match kind {
18            HandlebarsSyntaxKind::Mustache => "### Handlebars Mustache\nA basic template expression.",
19            HandlebarsSyntaxKind::Block => "### Handlebars Block\nA block helper expression.",
20            HandlebarsSyntaxKind::Partial => "### Handlebars Partial\nIncludes another template.",
21            HandlebarsSyntaxKind::CommentNode => "### Handlebars Comment\nA template comment.",
22            _ => return None,
23        };
24
25        Some(Hover { contents: contents.to_string(), range: Some(node.span()) })
26    }
27}
28
29/// Language service implementation for Handlebars.
30pub struct HandlebarsLanguageService<V: Vfs> {
31    vfs: V,
32    workspace: oak_lsp::workspace::WorkspaceManager,
33    hover_provider: HandlebarsHoverProvider,
34}
35
36impl<V: Vfs> HandlebarsLanguageService<V> {
37    /// Creates a new `HandlebarsLanguageService`.
38    pub fn new(vfs: V) -> Self {
39        Self { vfs, workspace: oak_lsp::workspace::WorkspaceManager::default(), hover_provider: HandlebarsHoverProvider }
40    }
41}
42
43impl<V: Vfs + Send + Sync + 'static + oak_vfs::WritableVfs> LanguageService for HandlebarsLanguageService<V> {
44    type Lang = HandlebarsLanguage;
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<'_, HandlebarsLanguage>>> + Send + '_ {
56        let source = self.vfs().get_source(uri);
57        async move {
58            let source = source?;
59            let language = HandlebarsLanguage::default();
60            let parser = crate::parser::HandlebarsParser::new(&language);
61            let lexer = crate::lexer::HandlebarsLexer::new(&language);
62
63            let mut cache = oak_core::parser::session::ParseSession::<HandlebarsLanguage>::default();
64            let _output = oak_core::parser::parse(&parser, &lexer, &source, &[], &mut cache);
65            None
66        }
67    }
68
69    fn hover(&self, uri: &str, range: Range<usize>) -> impl Future<Output = Option<oak_lsp::Hover>> + Send + '_ {
70        let uri = uri.to_string();
71        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() }
72    }
73}
oak_handlebars/lsp.rs

oak_handlebars/
lsp.rs
