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use citeproc::field::text::TextFieldData;
use rowan::ast::AstNode;
use syntax::bibtex::{self, HasName, HasValue};
use crate::{Hover, HoverData, HoverParams};
pub(super) fn find_hover<'db>(params: &HoverParams<'db>) -> Option<Hover<'db>> {
let data = params.document.data.as_bib()?;
let root = bibtex::Root::cast(data.root_node())?;
let name = root
.syntax()
.token_at_offset(params.offset)
.find(|token| token.kind() == bibtex::NAME)
.filter(|token| {
let parent = token.parent().unwrap();
bibtex::Value::can_cast(parent.kind()) || bibtex::StringDef::can_cast(parent.kind())
})?;
for string in root.strings() {
if !string
.name_token()
.map_or(false, |token| token.text() == name.text())
{
continue;
}
let value = TextFieldData::parse(&string.value()?)?.text;
return Some(Hover {
range: name.text_range(),
data: HoverData::StringRef(value),
});
}
None
}
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