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use ra_db::{FilePosition, FileId, CrateId};
use crate::{NavigationTarget, db::RootDatabase};
/// This returns `Vec` because a module may be included from several places. We
/// don't handle this case yet though, so the Vec has length at most one.
pub(crate) fn parent_module(db: &RootDatabase, position: FilePosition) -> Vec<NavigationTarget> {
let module = match hir::source_binder::module_from_position(db, position) {
None => return Vec::new(),
Some(it) => it,
};
let nav = NavigationTarget::from_module_to_decl(db, module);
vec![nav]
}
/// Returns `Vec` for the same reason as `parent_module`
pub(crate) fn crate_for(db: &RootDatabase, file_id: FileId) -> Vec<CrateId> {
let module = match hir::source_binder::module_from_file_id(db, file_id) {
Some(it) => it,
None => return Vec::new(),
};
let krate = match module.krate(db) {
Some(it) => it,
None => return Vec::new(),
};
vec![krate.crate_id()]
}
#[cfg(test)]
mod tests {
use crate::mock_analysis::analysis_and_position;
#[test]
fn test_resolve_parent_module() {
let (analysis, pos) = analysis_and_position(
"
//- /lib.rs
mod foo;
//- /foo.rs
<|>// empty
",
);
let nav = analysis.parent_module(pos).unwrap().pop().unwrap();
nav.assert_match("foo MODULE FileId(1) [0; 8)");
}
#[test]
fn test_resolve_parent_module_for_inline() {
let (analysis, pos) = analysis_and_position(
"
//- /lib.rs
mod foo {
mod bar {
mod baz { <|> }
}
}
",
);
let nav = analysis.parent_module(pos).unwrap().pop().unwrap();
nav.assert_match("baz MODULE FileId(1) [32; 44)");
}
}
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