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use crate::range::RangeExt;
use crate::syntax::*;
use crate::workspace::*;
use futures_boxed::boxed;
use lsp_types::{DocumentHighlight, DocumentHighlightKind, TextDocumentPositionParams};
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct LatexLabelHighlightProvider;
impl FeatureProvider for LatexLabelHighlightProvider {
type Params = TextDocumentPositionParams;
type Output = Vec<DocumentHighlight>;
#[boxed]
async fn execute<'a>(
&'a self,
request: &'a FeatureRequest<TextDocumentPositionParams>,
) -> Vec<DocumentHighlight> {
let mut highlights = Vec::new();
if let SyntaxTree::Latex(tree) = &request.document().tree {
if let Some(name) = tree
.structure
.labels
.iter()
.flat_map(LatexLabel::names)
.find(|label| label.range().contains(request.params.position))
.map(|label| label.text())
{
for label_group in &tree.structure.labels {
for label in label_group.names() {
if label.text() == name {
let highlight = DocumentHighlight {
range: label.range(),
kind: Some(match label_group.kind {
LatexLabelKind::Definition => DocumentHighlightKind::Write,
LatexLabelKind::Reference(_) => DocumentHighlightKind::Read,
}),
};
highlights.push(highlight);
}
}
}
}
}
highlights
}
}
#[cfg(test)]
mod tests {
use super::*;
use lsp_types::{Position, Range};
#[test]
fn test_has_label() {
let highlights = test_feature(
LatexLabelHighlightProvider,
FeatureSpec {
files: vec![FeatureSpec::file("foo.tex", "\\label{foo}\n\\ref{foo}")],
main_file: "foo.tex",
position: Position::new(0, 7),
..FeatureSpec::default()
},
);
assert_eq!(
highlights,
vec![
DocumentHighlight {
range: Range::new_simple(0, 7, 0, 10),
kind: Some(DocumentHighlightKind::Write),
},
DocumentHighlight {
range: Range::new_simple(1, 5, 1, 8),
kind: Some(DocumentHighlightKind::Read),
}
]
);
}
#[test]
fn test_no_label_latex() {
let highlights = test_feature(
LatexLabelHighlightProvider,
FeatureSpec {
files: vec![FeatureSpec::file("foo.tex", "")],
main_file: "foo.tex",
position: Position::new(0, 0),
..FeatureSpec::default()
},
);
assert!(highlights.is_empty());
}
#[test]
fn test_no_label_bibtex() {
let highlights = test_feature(
LatexLabelHighlightProvider,
FeatureSpec {
files: vec![FeatureSpec::file("foo.bib", "")],
main_file: "foo.bib",
position: Position::new(0, 0),
..FeatureSpec::default()
},
);
assert!(highlights.is_empty());
}
}
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