use base_db::{CrateId, FileId, FilePosition}; use hir::Semantics; use ide_db::RootDatabase; use syntax::{ algo::find_node_at_offset, ast::{self, AstNode}, }; use test_utils::mark; use crate::NavigationTarget; // Feature: Parent Module // // Navigates to the parent module of the current module. // // |=== // | Editor | Action Name // // | VS Code | **Rust Analyzer: Locate parent module** // |=== /// 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 { let sema = Semantics::new(db); let source_file = sema.parse(position.file_id); let mut module = find_node_at_offset::(source_file.syntax(), position.offset); // If cursor is literally on `mod foo`, go to the grandpa. if let Some(m) = &module { if !m .item_list() .map_or(false, |it| it.syntax().text_range().contains_inclusive(position.offset)) { mark::hit!(test_resolve_parent_module_on_module_decl); module = m.syntax().ancestors().skip(1).find_map(ast::Module::cast); } } let module = match module { Some(module) => sema.to_def(&module), None => sema.to_module_def(position.file_id), }; let module = match module { 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 { let sema = Semantics::new(db); let module = match sema.to_module_def(file_id) { Some(it) => it, None => return Vec::new(), }; let krate = module.krate(); vec![krate.into()] } #[cfg(test)] mod tests { use test_utils::mark; use crate::fixture::{self}; #[test] fn test_resolve_parent_module() { let (analysis, pos) = fixture::position( " //- /lib.rs mod foo; //- /foo.rs <|>// empty ", ); let nav = analysis.parent_module(pos).unwrap().pop().unwrap(); nav.assert_match("foo MODULE FileId(0) 0..8"); } #[test] fn test_resolve_parent_module_on_module_decl() { mark::check!(test_resolve_parent_module_on_module_decl); let (analysis, pos) = fixture::position( " //- /lib.rs mod foo; //- /foo.rs mod <|>bar; //- /foo/bar.rs // empty ", ); let nav = analysis.parent_module(pos).unwrap().pop().unwrap(); nav.assert_match("foo MODULE FileId(0) 0..8"); } #[test] fn test_resolve_parent_module_for_inline() { let (analysis, pos) = fixture::position( " //- /lib.rs mod foo { mod bar { mod baz { <|> } } } ", ); let nav = analysis.parent_module(pos).unwrap().pop().unwrap(); nav.assert_match("baz MODULE FileId(0) 32..44"); } #[test] fn test_resolve_crate_root() { let (analysis, file_id) = fixture::file( r#" //- /main.rs mod foo; //- /foo.rs <|> "#, ); assert_eq!(analysis.crate_for(file_id).unwrap().len(), 1); } }