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-rw-r--r--support/texlab/src/features/hover/label.rs79
1 files changed, 79 insertions, 0 deletions
diff --git a/support/texlab/src/features/hover/label.rs b/support/texlab/src/features/hover/label.rs
new file mode 100644
index 0000000000..79afe7d250
--- /dev/null
+++ b/support/texlab/src/features/hover/label.rs
@@ -0,0 +1,79 @@
+use cancellation::CancellationToken;
+use lsp_types::{Hover, HoverContents, HoverParams};
+
+use crate::{features::cursor::CursorContext, render_label, LineIndexExt};
+
+pub fn find_label_hover(
+ context: &CursorContext<HoverParams>,
+ _token: &CancellationToken,
+) -> Option<Hover> {
+ let main_document = context.request.main_document();
+
+ let (name_text, name_range) = context
+ .find_label_name_word()
+ .or_else(|| context.find_label_name_command())?;
+
+ let label = render_label(&context.request.subset, name_text, None)?;
+
+ Some(Hover {
+ range: Some(main_document.line_index.line_col_lsp_range(name_range)),
+ contents: HoverContents::Markup(label.documentation()),
+ })
+}
+
+#[cfg(test)]
+mod tests {
+ use lsp_types::Range;
+
+ use crate::{features::testing::FeatureTester, RangeExt};
+
+ use super::*;
+
+ #[test]
+ fn test_empty_latex_document() {
+ let request = FeatureTester::builder()
+ .files(vec![("main.tex", "")])
+ .main("main.tex")
+ .line(0)
+ .character(0)
+ .build()
+ .hover();
+
+ let context = CursorContext::new(request);
+ let actual_hover = find_label_hover(&context, CancellationToken::none());
+
+ assert_eq!(actual_hover, None);
+ }
+
+ #[test]
+ fn test_empty_bibtex_document() {
+ let request = FeatureTester::builder()
+ .files(vec![("main.bib", "")])
+ .main("main.bib")
+ .line(0)
+ .character(0)
+ .build()
+ .hover();
+
+ let context = CursorContext::new(request);
+ let actual_hover = find_label_hover(&context, CancellationToken::none());
+
+ assert_eq!(actual_hover, None);
+ }
+
+ #[test]
+ fn test_section() {
+ let request = FeatureTester::builder()
+ .files(vec![("main.tex", r#"\section{Foo}\label{sec:foo}"#)])
+ .main("main.tex")
+ .line(0)
+ .character(23)
+ .build()
+ .hover();
+
+ let context = CursorContext::new(request);
+ let actual_hover = find_label_hover(&context, CancellationToken::none()).unwrap();
+
+ assert_eq!(actual_hover.range.unwrap(), Range::new_simple(0, 20, 0, 27));
+ }
+}