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|
use hir::Semantics;
use ide_db::base_db::{CrateId, FileId, FilePosition};
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<NavigationTarget> {
let sema = Semantics::new(db);
let source_file = sema.parse(position.file_id);
let mut module = find_node_at_offset::<ast::Module>(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<CrateId> {
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
$0// 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 $0bar;
//- /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 { $0 }
}
}
",
);
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
$0
"#,
);
assert_eq!(analysis.crate_for(file_id).unwrap().len(), 1);
}
}
|
