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|
use hir::{Crate, ImplDef, Semantics};
use ra_ide_db::RootDatabase;
use ra_syntax::{algo::find_node_at_offset, ast, AstNode};
use crate::{display::ToNav, FilePosition, NavigationTarget, RangeInfo};
// Feature: Go to Implementation
//
// Navigates to the impl block of structs, enums or traits. Also implemented as a code lens.
//
// |===
// | Editor | Shortcut
//
// | VS Code | kbd:[Ctrl+F12]
// |===
pub(crate) fn goto_implementation(
db: &RootDatabase,
position: FilePosition,
) -> Option<RangeInfo<Vec<NavigationTarget>>> {
let sema = Semantics::new(db);
let source_file = sema.parse(position.file_id);
let syntax = source_file.syntax().clone();
let krate = sema.to_module_def(position.file_id)?.krate();
if let Some(nominal_def) = find_node_at_offset::<ast::AdtDef>(&syntax, position.offset) {
return Some(RangeInfo::new(
nominal_def.syntax().text_range(),
impls_for_def(&sema, &nominal_def, krate)?,
));
} else if let Some(trait_def) = find_node_at_offset::<ast::TraitDef>(&syntax, position.offset) {
return Some(RangeInfo::new(
trait_def.syntax().text_range(),
impls_for_trait(&sema, &trait_def, krate)?,
));
}
None
}
fn impls_for_def(
sema: &Semantics<RootDatabase>,
node: &ast::AdtDef,
krate: Crate,
) -> Option<Vec<NavigationTarget>> {
let ty = match node {
ast::AdtDef::StructDef(def) => sema.to_def(def)?.ty(sema.db),
ast::AdtDef::EnumDef(def) => sema.to_def(def)?.ty(sema.db),
ast::AdtDef::UnionDef(def) => sema.to_def(def)?.ty(sema.db),
};
let impls = ImplDef::all_in_crate(sema.db, krate);
Some(
impls
.into_iter()
.filter(|impl_def| ty.is_equal_for_find_impls(&impl_def.target_ty(sema.db)))
.map(|imp| imp.to_nav(sema.db))
.collect(),
)
}
fn impls_for_trait(
sema: &Semantics<RootDatabase>,
node: &ast::TraitDef,
krate: Crate,
) -> Option<Vec<NavigationTarget>> {
let tr = sema.to_def(node)?;
let impls = ImplDef::for_trait(sema.db, krate, tr);
Some(impls.into_iter().map(|imp| imp.to_nav(sema.db)).collect())
}
#[cfg(test)]
mod tests {
use ra_db::FileRange;
use crate::mock_analysis::MockAnalysis;
fn check(ra_fixture: &str) {
let (mock, position) = MockAnalysis::with_files_and_position(ra_fixture);
let annotations = mock.annotations();
let analysis = mock.analysis();
let navs = analysis.goto_implementation(position).unwrap().unwrap().info;
let key = |frange: &FileRange| (frange.file_id, frange.range.start());
let mut expected = annotations
.into_iter()
.map(|(range, data)| {
assert!(data.is_empty());
range
})
.collect::<Vec<_>>();
expected.sort_by_key(key);
let mut actual = navs
.into_iter()
.map(|nav| FileRange { file_id: nav.file_id, range: nav.focus_or_full_range() })
.collect::<Vec<_>>();
actual.sort_by_key(key);
assert_eq!(expected, actual);
}
#[test]
fn goto_implementation_works() {
check(
r#"
struct Foo<|>;
impl Foo {}
//^^^
"#,
);
}
#[test]
fn goto_implementation_works_multiple_blocks() {
check(
r#"
struct Foo<|>;
impl Foo {}
//^^^
impl Foo {}
//^^^
"#,
);
}
#[test]
fn goto_implementation_works_multiple_mods() {
check(
r#"
struct Foo<|>;
mod a {
impl super::Foo {}
//^^^^^^^^^^
}
mod b {
impl super::Foo {}
//^^^^^^^^^^
}
"#,
);
}
#[test]
fn goto_implementation_works_multiple_files() {
check(
r#"
//- /lib.rs
struct Foo<|>;
mod a;
mod b;
//- /a.rs
impl crate::Foo {}
//^^^^^^^^^^
//- /b.rs
impl crate::Foo {}
//^^^^^^^^^^
"#,
);
}
#[test]
fn goto_implementation_for_trait() {
check(
r#"
trait T<|> {}
struct Foo;
impl T for Foo {}
//^^^
"#,
);
}
#[test]
fn goto_implementation_for_trait_multiple_files() {
check(
r#"
//- /lib.rs
trait T<|> {};
struct Foo;
mod a;
mod b;
//- /a.rs
impl crate::T for crate::Foo {}
//^^^^^^^^^^
//- /b.rs
impl crate::T for crate::Foo {}
//^^^^^^^^^^
"#,
);
}
#[test]
fn goto_implementation_all_impls() {
check(
r#"
//- /lib.rs
trait T {}
struct Foo<|>;
impl Foo {}
//^^^
impl T for Foo {}
//^^^
impl T for &Foo {}
//^^^^
"#,
);
}
#[test]
fn goto_implementation_to_builtin_derive() {
check(
r#"
#[derive(Copy)]
//^^^^^^^^^^^^^^^
struct Foo<|>;
mod marker {
trait Copy {}
}
"#,
);
}
}
|
