oak_haskell/lsp/
mod.rs

1#![doc = include_str!("readme.md")]
2#[cfg(feature = "oak-highlight")]
3pub mod highlighter;
4
5use crate::{HaskellLanguage, lexer::token_type::HaskellTokenType};
6use core::range::Range;
7use oak_core::tree::RedNode;
8#[cfg(feature = "lsp")]
9use {
10    futures::Future,
11    oak_hover::{Hover, HoverProvider},
12    oak_lsp::service::LanguageService,
13    oak_vfs::Vfs,
14};
15/// Hover provider implementation for Haskell.
16#[cfg(feature = "lsp")]
17pub struct HaskellHoverProvider;
18#[cfg(feature = "lsp")]
19impl HoverProvider<HaskellLanguage> for HaskellHoverProvider {
20    fn hover(&self, node: &RedNode<HaskellLanguage>, _range: Range<usize>) -> Option<Hover> {
21        let kind = node.green.kind;
22        // Provide context-aware hover information
23        let contents = match kind {
24            HaskellTokenType::Function => "### Haskell Function\nDefines a transformation from inputs to outputs.",
25            HaskellElementType::DataDeclaration => "### Haskell Data Type\nDefines a new algebraic data type.",
26            HaskellElementType::ModuleDeclaration => "### Haskell Module\nOrganizes Haskell code into namespaces.",
27            _ => return None,
28        };
29        Some(Hover { contents: contents.to_string(), range: Some(node.span()) })
30    }
31}
32/// Language service implementation for Haskell.
33#[cfg(feature = "lsp")]
34pub struct HaskellLanguageService<V: Vfs> {
35    vfs: V,
36    workspace: oak_lsp::workspace::WorkspaceManager,
37    hover_provider: HaskellHoverProvider,
38}
39impl<V: Vfs> HaskellLanguageService<V> {
40    /// Creates a new `HaskellLanguageService`.
41    pub fn new(vfs: V) -> Self {
42        Self { vfs, workspace: oak_lsp::workspace::WorkspaceManager::default(), hover_provider: HaskellHoverProvider }
43    }
44}
45impl<V: Vfs + Send + Sync + 'static + oak_vfs::WritableVfs> LanguageService for HaskellLanguageService<V> {
46    type Lang = HaskellLanguage;
47    type Vfs = V;
48    fn vfs(&self) -> &Self::Vfs {
49        &self.vfs
50    }
51    fn workspace(&self) -> &oak_lsp::workspace::WorkspaceManager {
52        &self.workspace
53    }
54    fn get_root(&self, uri: &str) -> impl Future<Output = Option<RedNode<'_, HaskellLanguage>>> + Send + '_ {
55        let source = self.vfs().get_source(uri);
56        async move {
57            let source = source?;
58            let language = HaskellLanguage::default();
59            let parser = crate::parser::HaskellParser::new(&language);
60            let lexer = crate::lexer::HaskellLexer::new(&language);
61            let mut cache = oak_core::parser::session::ParseSession::<HaskellLanguage>::default();
62            let _output = oak_core::parser::parse(&parser, &lexer, &source, &[], &mut cache);
63            None
64        }
65    }
66    fn hover(&self, uri: &str, range: Range<usize>) -> impl Future<Output = Option<oak_lsp::Hover>> + Send + '_ {
67        let uri = uri.to_string();
68        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() }
69    }
70}
oak_haskell/lsp/mod.rs

oak_haskell/lsp/
mod.rs
