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use lsp_types::{DocumentHighlight, DocumentHighlightKind, DocumentHighlightParams};
use rowan::ast::AstNode;
use crate::{features::cursor::CursorContext, syntax::latex, LineIndexExt};
pub fn find_label_highlights(
context: &CursorContext<DocumentHighlightParams>,
) -> Option<Vec<DocumentHighlight>> {
let (name_text, _) = context.find_label_name_key()?;
let main_document = context.request.main_document();
let data = main_document.data.as_latex()?;
let mut highlights = Vec::new();
for node in latex::SyntaxNode::new_root(data.green.clone()).descendants() {
if let Some(label_name) = latex::LabelDefinition::cast(node.clone())
.and_then(|label| label.name())
.and_then(|label_name| label_name.key())
.filter(|label_name| label_name.to_string() == name_text)
{
let range = main_document
.line_index
.line_col_lsp_range(latex::small_range(&label_name));
highlights.push(DocumentHighlight {
range,
kind: Some(DocumentHighlightKind::WRITE),
});
} else if let Some(label) = latex::LabelReference::cast(node.clone()) {
for label_name in label
.name_list()
.into_iter()
.flat_map(|name| name.keys())
.filter(|label_name| label_name.to_string() == name_text)
{
let range = main_document
.line_index
.line_col_lsp_range(latex::small_range(&label_name));
highlights.push(DocumentHighlight {
range,
kind: Some(DocumentHighlightKind::READ),
});
}
} else if let Some(label) = latex::LabelReferenceRange::cast(node.clone()) {
if let Some(label_name) = label
.from()
.and_then(|label_name| label_name.key())
.filter(|label_name| label_name.to_string() == name_text)
{
let range = main_document
.line_index
.line_col_lsp_range(latex::small_range(&label_name));
highlights.push(DocumentHighlight {
range,
kind: Some(DocumentHighlightKind::READ),
});
}
if let Some(label_name) = label
.to()
.and_then(|label_name| label_name.key())
.filter(|label_name| label_name.to_string() == name_text)
{
let range = main_document
.line_index
.line_col_lsp_range(latex::small_range(&label_name));
highlights.push(DocumentHighlight {
range,
kind: Some(DocumentHighlightKind::READ),
});
}
}
}
Some(highlights)
}
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