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use crate::citeproc::render_citation;
use crate::range::RangeExt;
use crate::syntax::*;
use crate::workspace::*;
use futures_boxed::boxed;
use log::warn;
use lsp_types::*;
#[derive(Debug, PartialEq, Eq, Clone)]
pub struct LatexCitationHoverProvider;
impl FeatureProvider for LatexCitationHoverProvider {
type Params = TextDocumentPositionParams;
type Output = Option<Hover>;
#[boxed]
async fn execute<'a>(
&'a self,
request: &'a FeatureRequest<TextDocumentPositionParams>,
) -> Option<Hover> {
let (tree, entry) = Self::get_entry(request)?;
if entry.is_comment() {
None
} else {
let key = entry.key.as_ref().unwrap().text();
match render_citation(&tree, key) {
Some(markdown) => Some(Hover {
contents: HoverContents::Markup(markdown),
range: None,
}),
None => {
warn!("Failed to render entry: {}", key);
None
}
}
}
}
}
impl LatexCitationHoverProvider {
fn get_entry(
request: &FeatureRequest<TextDocumentPositionParams>,
) -> Option<(&BibtexSyntaxTree, &BibtexEntry)> {
let key = Self::get_key(request)?;
for document in request.related_documents() {
if let SyntaxTree::Bibtex(tree) = &document.tree {
for entry in tree.entries() {
if let Some(current_key) = &entry.key {
if current_key.text() == key {
return Some((tree, entry));
}
}
}
}
}
None
}
fn get_key(request: &FeatureRequest<TextDocumentPositionParams>) -> Option<&str> {
match &request.document().tree {
SyntaxTree::Latex(tree) => tree
.citations
.iter()
.flat_map(LatexCitation::keys)
.find(|citation| citation.range().contains(request.params.position))
.map(LatexToken::text),
SyntaxTree::Bibtex(tree) => {
for entry in tree.entries() {
if let Some(key) = &entry.key {
if key.range().contains(request.params.position) {
return Some(key.text());
}
}
}
None
}
}
}
}
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