149 lines
4.2 KiB
Rust
149 lines
4.2 KiB
Rust
//! FIXME: write short doc here
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use hir::Semantics;
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use ra_db::{CrateId, FileId, FilePosition};
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use ra_ide_db::RootDatabase;
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use ra_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 test_utils::tested_by;
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use crate::NavigationTarget;
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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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tested_by!(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 ra_cfg::CfgOptions;
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use ra_db::Env;
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use test_utils::covers;
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use crate::{
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mock_analysis::{analysis_and_position, MockAnalysis},
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AnalysisChange, CrateGraph,
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Edition::Edition2018,
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};
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#[test]
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fn test_resolve_parent_module() {
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let (analysis, pos) = analysis_and_position(
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"
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//- /lib.rs
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mod foo;
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//- /foo.rs
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<|>// empty
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",
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);
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let nav = analysis.parent_module(pos).unwrap().pop().unwrap();
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nav.assert_match("foo MODULE FileId(1) [0; 8)");
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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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covers!(test_resolve_parent_module_on_module_decl);
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let (analysis, pos) = analysis_and_position(
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"
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//- /lib.rs
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mod foo;
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//- /foo.rs
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mod <|>bar;
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//- /foo/bar.rs
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// empty
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",
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);
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let nav = analysis.parent_module(pos).unwrap().pop().unwrap();
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nav.assert_match("foo MODULE FileId(1) [0; 8)");
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}
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#[test]
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fn test_resolve_parent_module_for_inline() {
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let (analysis, pos) = analysis_and_position(
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"
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//- /lib.rs
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mod foo {
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mod bar {
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mod baz { <|> }
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}
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}
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",
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);
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let nav = analysis.parent_module(pos).unwrap().pop().unwrap();
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nav.assert_match("baz MODULE FileId(1) [32; 44)");
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}
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#[test]
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fn test_resolve_crate_root() {
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let mock = MockAnalysis::with_files(
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"
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//- /bar.rs
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mod foo;
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//- /foo.rs
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// empty <|>
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",
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);
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let root_file = mock.id_of("/bar.rs");
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let mod_file = mock.id_of("/foo.rs");
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let mut host = mock.analysis_host();
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assert!(host.analysis().crate_for(mod_file).unwrap().is_empty());
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let mut crate_graph = CrateGraph::default();
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let crate_id = crate_graph.add_crate_root(
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root_file,
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Edition2018,
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None,
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CfgOptions::default(),
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Env::default(),
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Default::default(),
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Default::default(),
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);
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let mut change = AnalysisChange::new();
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change.set_crate_graph(crate_graph);
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host.apply_change(change);
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assert_eq!(host.analysis().crate_for(mod_file).unwrap(), vec![crate_id]);
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}
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}
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