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use lsp_types::{FoldingRange, FoldingRangeKind, Range, Url};
use rowan::ast::AstNode;
use crate::{
db::{parse::DocumentData, Workspace},
syntax::{bibtex, latex},
util::line_index_ext::LineIndexExt,
Db,
};
pub fn find_all(db: &dyn Db, uri: &Url) -> Option<Vec<FoldingRange>> {
let document = Workspace::get(db).lookup_uri(db, uri)?;
let line_index = document.contents(db).line_index(db);
let foldings = match document.parse(db) {
DocumentData::Tex(data) => {
let mut results = Vec::new();
let root = data.root(db);
for node in root.descendants() {
if let Some(folding) = latex::Environment::cast(node.clone())
.map(|node| latex::small_range(&node))
.or_else(|| {
latex::Section::cast(node.clone()).map(|node| latex::small_range(&node))
})
.or_else(|| latex::EnumItem::cast(node).map(|node| latex::small_range(&node)))
.map(|node| line_index.line_col_lsp_range(node))
.map(create_range)
{
results.push(folding);
}
}
results
}
DocumentData::Bib(data) => {
let root = data.root(db);
root.descendants()
.filter(|node| {
matches!(
node.kind(),
bibtex::PREAMBLE | bibtex::STRING | bibtex::ENTRY
)
})
.map(|node| create_range(line_index.line_col_lsp_range(node.text_range())))
.collect()
}
DocumentData::Log(_) | DocumentData::TexlabRoot(_) | DocumentData::Tectonic(_) => {
return None;
}
};
Some(foldings)
}
fn create_range(range: Range) -> FoldingRange {
FoldingRange {
start_line: range.start.line,
start_character: Some(range.start.character),
end_line: range.end.line,
end_character: Some(range.end.character),
collapsed_text: None,
kind: Some(FoldingRangeKind::Region),
}
}
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