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67 lines
2.3 KiB
Rust
67 lines
2.3 KiB
Rust
use std::ops::Range;
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use log::debug;
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use crate::{prelude::*, syntax::DerefTarget, SemanticRequest};
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/// The [`textDocument/declaration`] request asks the server for the declaration
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/// location of a symbol at a given text document position.
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///
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/// [`textDocument/declaration`]: https://microsoft.github.io/language-server-protocol/specification#textDocument_declaration
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///
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/// # Compatibility
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///
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/// This request was introduced in specification version 3.14.0.
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///
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/// The [`GotoDeclarationResponse::Link`](lsp_types::GotoDefinitionResponse::Link) return value
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/// was introduced in specification version 3.14.0 and requires client-side
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/// support in order to be used. It can be returned if the client set the
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/// following field to `true` in the `initialize` method:
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///
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/// ```text
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/// InitializeParams::capabilities::text_document::declaration::link_support
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/// ```
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#[derive(Debug, Clone)]
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pub struct GotoDeclarationRequest {
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/// The path of the document to get the declaration location for.
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pub path: PathBuf,
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/// The position of the symbol to get the declaration location for.
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pub position: LspPosition,
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}
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impl SemanticRequest for GotoDeclarationRequest {
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type Response = GotoDeclarationResponse;
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fn request(self, ctx: &mut AnalysisContext) -> Option<Self::Response> {
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let source = ctx.source_by_path(&self.path).ok()?;
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let deref_target = ctx.deref_syntax_at(&source, self.position, 1)?;
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let origin_selection_range = ctx.to_lsp_range(deref_target.node().range(), &source);
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let def_use = ctx.def_use(source.clone())?;
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let ref_spans = find_declarations(ctx, def_use, deref_target)?;
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let mut links = vec![];
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for ref_range in ref_spans {
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let uri = ctx.uri_for_id(source.id()).ok()?;
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let range = ctx.to_lsp_range(ref_range, &source);
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links.push(LocationLink {
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origin_selection_range: Some(origin_selection_range),
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target_uri: uri,
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target_range: range,
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target_selection_range: range,
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});
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}
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debug!("goto_declaration: {links:?}");
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Some(GotoDeclarationResponse::Link(links))
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}
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}
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fn find_declarations(
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_ctx: &AnalysisContext,
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_def_use: Arc<crate::analysis::DefUseInfo>,
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_deref_target: DerefTarget<'_>,
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) -> Option<Vec<Range<usize>>> {
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todo!()
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}
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