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use lsp_types::{Hover, HoverContents, HoverParams, MarkupContent};
use rowan::ast::AstNode;
use crate::{features::cursor::CursorContext, syntax::bibtex, LineIndexExt, LANGUAGE_DATA};
pub fn find_field_hover(context: &CursorContext<HoverParams>) -> Option<Hover> {
let main_document = context.request.main_document();
let name = context
.cursor
.as_bibtex()
.filter(|token| token.kind() == bibtex::NAME)?;
bibtex::Field::cast(name.parent()?)?;
let docs = LANGUAGE_DATA.field_documentation(name.text())?;
Some(Hover {
contents: HoverContents::Markup(MarkupContent {
kind: lsp_types::MarkupKind::Markdown,
value: docs.to_string(),
}),
range: Some(
main_document
.line_index
.line_col_lsp_range(name.text_range()),
),
})
}
#[cfg(test)]
mod tests {
use lsp_types::{MarkupKind, 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_field_hover(&context);
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_field_hover(&context);
assert_eq!(actual_hover, None);
}
#[test]
fn test_known_field() {
let request = FeatureTester::builder()
.files(vec![("main.bib", r#"@article{foo, author = bar}"#)])
.main("main.bib")
.line(0)
.character(15)
.build()
.hover();
let context = CursorContext::new(request);
let actual_hover = find_field_hover(&context).unwrap();
let expected_hover = Hover {
contents: HoverContents::Markup(MarkupContent {
kind: MarkupKind::Markdown,
value: LANGUAGE_DATA.field_documentation("author").unwrap().into(),
}),
range: Some(Range::new_simple(0, 14, 0, 20)),
};
assert_eq!(actual_hover, expected_hover);
}
#[test]
fn test_unknown_field() {
let request = FeatureTester::builder()
.files(vec![("main.bib", r#"@article{foo, bar = baz}"#)])
.main("main.bib")
.line(0)
.character(15)
.build()
.hover();
let context = CursorContext::new(request);
let actual_hover = find_field_hover(&context);
assert_eq!(actual_hover, None);
}
#[test]
fn test_entry_key() {
let request = FeatureTester::builder()
.files(vec![("main.bib", r#"@article{foo, author = bar}"#)])
.main("main.bib")
.line(0)
.character(11)
.build()
.hover();
let context = CursorContext::new(request);
let actual_hover = find_field_hover(&context);
assert_eq!(actual_hover, None);
}
}
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