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use crate::{
feature::{FeatureProvider, FeatureRequest},
protocol::{FoldingRange, FoldingRangeKind, FoldingRangeParams},
syntax::SyntaxNode,
workspace::DocumentContent,
};
use async_trait::async_trait;
#[derive(Debug, PartialEq, Eq, Clone, Copy, Default)]
pub struct LatexEnvironmentFoldingProvider;
#[async_trait]
impl FeatureProvider for LatexEnvironmentFoldingProvider {
type Params = FoldingRangeParams;
type Output = Vec<FoldingRange>;
async fn execute<'a>(&'a self, req: &'a FeatureRequest<Self::Params>) -> Self::Output {
let mut foldings = Vec::new();
if let DocumentContent::Latex(table) = &req.current().content {
for env in &table.environments {
let left_node = &table[env.left.parent];
let right_node = &table[env.right.parent];
let folding = FoldingRange {
start_line: left_node.end().line,
start_character: Some(left_node.end().character),
end_line: right_node.start().line,
end_character: Some(right_node.start().character),
kind: Some(FoldingRangeKind::Region),
};
foldings.push(folding);
}
}
foldings
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::feature::FeatureTester;
use indoc::indoc;
#[tokio::test]
async fn multiline() {
let actual_foldings = FeatureTester::new()
.file(
"main.tex",
indoc!(
r#"
\begin{foo}
\end{foo}
"#
),
)
.main("main.tex")
.test_folding(LatexEnvironmentFoldingProvider)
.await;
let expected_foldings = vec![FoldingRange {
start_line: 0,
start_character: Some(11),
end_line: 1,
end_character: Some(0),
kind: Some(FoldingRangeKind::Region),
}];
assert_eq!(actual_foldings, expected_foldings);
}
#[tokio::test]
async fn bibtex() {
let actual_foldings = FeatureTester::new()
.file("main.bib", "")
.main("main.bib")
.test_folding(LatexEnvironmentFoldingProvider)
.await;
assert!(actual_foldings.is_empty());
}
}
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