135 lines
3.1 KiB
Rust
135 lines
3.1 KiB
Rust
use hir::Semantics;
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use ide_db::base_db::{CrateId, FileId, FilePosition};
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use ide_db::RootDatabase;
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use syntax::{
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algo::find_node_at_offset,
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ast::{self, AstNode},
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};
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use crate::NavigationTarget;
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// Feature: Parent Module
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//
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// Navigates to the parent module of the current module.
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//
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// |===
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// | Editor | Action Name
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//
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// | VS Code | **Rust Analyzer: Locate parent module**
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// |===
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/// This returns `Vec` because a module may be included from several places. We
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/// don't handle this case yet though, so the Vec has length at most one.
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pub(crate) fn parent_module(db: &RootDatabase, position: FilePosition) -> Vec<NavigationTarget> {
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let sema = Semantics::new(db);
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let source_file = sema.parse(position.file_id);
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let mut module = find_node_at_offset::<ast::Module>(source_file.syntax(), position.offset);
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// If cursor is literally on `mod foo`, go to the grandpa.
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if let Some(m) = &module {
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if !m
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.item_list()
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.map_or(false, |it| it.syntax().text_range().contains_inclusive(position.offset))
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{
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cov_mark::hit!(test_resolve_parent_module_on_module_decl);
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module = m.syntax().ancestors().skip(1).find_map(ast::Module::cast);
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}
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}
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let module = match module {
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Some(module) => sema.to_def(&module),
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None => sema.to_module_def(position.file_id),
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};
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let module = match module {
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None => return Vec::new(),
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Some(it) => it,
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};
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let nav = NavigationTarget::from_module_to_decl(db, module);
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vec![nav]
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}
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/// Returns `Vec` for the same reason as `parent_module`
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pub(crate) fn crate_for(db: &RootDatabase, file_id: FileId) -> Vec<CrateId> {
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let sema = Semantics::new(db);
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let module = match sema.to_module_def(file_id) {
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Some(it) => it,
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None => return Vec::new(),
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};
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let krate = module.krate();
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vec![krate.into()]
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}
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#[cfg(test)]
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mod tests {
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use ide_db::base_db::FileRange;
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use crate::fixture;
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fn check(ra_fixture: &str) {
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let (analysis, position, expected) = fixture::nav_target_annotation(ra_fixture);
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let mut navs = analysis.parent_module(position).unwrap();
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assert_eq!(navs.len(), 1);
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let nav = navs.pop().unwrap();
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assert_eq!(expected, FileRange { file_id: nav.file_id, range: nav.focus_or_full_range() });
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}
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#[test]
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fn test_resolve_parent_module() {
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check(
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r#"
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//- /lib.rs
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mod foo;
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//^^^
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//- /foo.rs
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$0// empty
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"#,
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);
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}
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#[test]
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fn test_resolve_parent_module_on_module_decl() {
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cov_mark::check!(test_resolve_parent_module_on_module_decl);
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check(
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r#"
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//- /lib.rs
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mod foo;
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//^^^
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//- /foo.rs
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mod $0bar;
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//- /foo/bar.rs
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// empty
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"#,
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);
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}
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#[test]
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fn test_resolve_parent_module_for_inline() {
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check(
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r#"
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//- /lib.rs
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mod foo {
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mod bar {
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mod baz { $0 }
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} //^^^
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}
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"#,
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);
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}
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#[test]
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fn test_resolve_crate_root() {
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let (analysis, file_id) = fixture::file(
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r#"
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//- /main.rs
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mod foo;
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//- /foo.rs
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$0
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"#,
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);
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assert_eq!(analysis.crate_for(file_id).unwrap().len(), 1);
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}
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}
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