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-rw-r--r--support/texlab/src/definition/latex_label.rs141
1 files changed, 141 insertions, 0 deletions
diff --git a/support/texlab/src/definition/latex_label.rs b/support/texlab/src/definition/latex_label.rs
new file mode 100644
index 0000000000..8d1a415749
--- /dev/null
+++ b/support/texlab/src/definition/latex_label.rs
@@ -0,0 +1,141 @@
+use crate::range::RangeExt;
+use crate::symbol::build_section_tree;
+use crate::syntax::*;
+use crate::workspace::*;
+use futures_boxed::boxed;
+use lsp_types::{LocationLink, TextDocumentPositionParams};
+use std::sync::Arc;
+
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct LatexLabelDefinitionProvider;
+
+impl FeatureProvider for LatexLabelDefinitionProvider {
+ type Params = TextDocumentPositionParams;
+ type Output = Vec<LocationLink>;
+
+ #[boxed]
+ async fn execute<'a>(&'a self, request: &'a FeatureRequest<Self::Params>) -> Self::Output {
+ let mut links = Vec::new();
+ if let Some(reference) = Self::find_reference(&request) {
+ for document in request.related_documents() {
+ let workspace = Arc::clone(&request.view.workspace);
+ let view = DocumentView::new(workspace, Arc::clone(&document));
+ Self::find_definitions(&view, &reference, &mut links);
+ }
+ }
+ links
+ }
+}
+
+impl LatexLabelDefinitionProvider {
+ fn find_definitions(
+ view: &DocumentView,
+ reference: &LatexToken,
+ links: &mut Vec<LocationLink>,
+ ) {
+ if let SyntaxTree::Latex(tree) = &view.document.tree {
+ let outline = Outline::from(view);
+ let section_tree = build_section_tree(view, tree);
+ for label in &tree.structure.labels {
+ if label.kind == LatexLabelKind::Definition {
+ let context = OutlineContext::parse(view, label, &outline);
+ for name in label.names() {
+ if name.text() == reference.text() {
+ let target_range = if let Some(OutlineContextItem::Section { .. }) =
+ context.as_ref().map(|ctx| &ctx.item)
+ {
+ section_tree
+ .find(reference.text())
+ .map(|sec| sec.full_range)
+ } else {
+ context.as_ref().map(|ctx| ctx.range)
+ };
+
+ links.push(LocationLink {
+ origin_selection_range: Some(reference.range()),
+ target_uri: view.document.uri.clone().into(),
+ target_range: target_range.unwrap_or_else(|| label.range()),
+ target_selection_range: label.range(),
+ });
+ }
+ }
+ }
+ }
+ }
+ }
+
+ fn find_reference(request: &FeatureRequest<TextDocumentPositionParams>) -> Option<&LatexToken> {
+ if let SyntaxTree::Latex(tree) = &request.document().tree {
+ tree.structure
+ .labels
+ .iter()
+ .flat_map(LatexLabel::names)
+ .find(|label| label.range().contains(request.params.position))
+ } else {
+ None
+ }
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+ use lsp_types::{Position, Range};
+
+ #[test]
+ fn test_has_definition() {
+ let links = test_feature(
+ LatexLabelDefinitionProvider,
+ FeatureSpec {
+ files: vec![
+ FeatureSpec::file("foo.tex", "\\label{foo}"),
+ FeatureSpec::file(
+ "bar.tex",
+ "\\begin{a}\\begin{b}\\label{foo}\\end{b}\\end{a}\n\\input{baz.tex}",
+ ),
+ FeatureSpec::file("baz.tex", "\\ref{foo}"),
+ ],
+ main_file: "baz.tex",
+ position: Position::new(0, 5),
+ ..FeatureSpec::default()
+ },
+ );
+ assert_eq!(
+ links,
+ vec![LocationLink {
+ origin_selection_range: Some(Range::new_simple(0, 5, 0, 8)),
+ target_uri: FeatureSpec::uri("bar.tex"),
+ target_range: Range::new_simple(0, 18, 0, 29),
+ target_selection_range: Range::new_simple(0, 18, 0, 29)
+ }]
+ );
+ }
+
+ #[test]
+ fn test_no_definition_latex() {
+ let links = test_feature(
+ LatexLabelDefinitionProvider,
+ FeatureSpec {
+ files: vec![FeatureSpec::file("foo.tex", "")],
+ main_file: "foo.tex",
+ position: Position::new(0, 0),
+ ..FeatureSpec::default()
+ },
+ );
+ assert!(links.is_empty());
+ }
+
+ #[test]
+ fn test_no_definition_bibtex() {
+ let links = test_feature(
+ LatexLabelDefinitionProvider,
+ FeatureSpec {
+ files: vec![FeatureSpec::file("foo.bib", "")],
+ main_file: "foo.bib",
+ position: Position::new(0, 0),
+ ..FeatureSpec::default()
+ },
+ );
+ assert!(links.is_empty());
+ }
+}