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-rw-r--r--support/texlab/src/hover/latex_citation.rs79
1 files changed, 79 insertions, 0 deletions
diff --git a/support/texlab/src/hover/latex_citation.rs b/support/texlab/src/hover/latex_citation.rs
new file mode 100644
index 0000000000..339dd1b35f
--- /dev/null
+++ b/support/texlab/src/hover/latex_citation.rs
@@ -0,0 +1,79 @@
+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
+ }
+ }
+ }
+}