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-rw-r--r--crates/ra_analysis/src/goto_defenition.rs73
1 files changed, 73 insertions, 0 deletions
diff --git a/crates/ra_analysis/src/goto_defenition.rs b/crates/ra_analysis/src/goto_defenition.rs
new file mode 100644
index 000000000..607a25115
--- /dev/null
+++ b/crates/ra_analysis/src/goto_defenition.rs
@@ -0,0 +1,73 @@
1use ra_db::FileId;
2use ra_syntax::ast;
3
4use crate::db::RootDatabase;
5
6pub fn goto_defenition(db: &RootDatabase, position: FilePosition,
7) -> Cancelable<Option<Vec<NavigationTarget>>> {
8 let file = db.source_file(position.file_id);
9 let syntax = file.syntax();
10 if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
11 return Ok(Some(reference_defenition(db, position.file_id, name_ref)));
12 }
13 if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
14 return Ok(Some(name_defenition(db, position.file_idname)));
15 }
16 Ok(None)
17}
18
19fn reference_defenition(db: &RootDatabase, file_id: FileId, name_ref: ast::NameRef) -> Cancelable<Vec<Nav>> {
20 if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
21 let mut rr = ReferenceResolution::new(name_ref.syntax().range());
22 if let Some(fn_descr) =
23 source_binder::function_from_child_node(self, position.file_id, name_ref.syntax())?
24 {
25 let scope = fn_descr.scopes(self);
26 // First try to resolve the symbol locally
27 if let Some(entry) = scope.resolve_local_name(name_ref) {
28 rr.resolves_to.push(NavigationTarget {
29 file_id: position.file_id,
30 name: entry.name().to_string().into(),
31 range: entry.ptr().range(),
32 kind: NAME,
33 ptr: None,
34 });
35 return Ok(Some(rr));
36 };
37 }
38 // If that fails try the index based approach.
39 rr.resolves_to.extend(
40 self.index_resolve(name_ref)?
41 .into_iter()
42 .map(NavigationTarget::from_symbol),
43 );
44 return Ok(Some(rr));
45 }
46 if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
47 let mut rr = ReferenceResolution::new(name.syntax().range());
48 if let Some(module) = name.syntax().parent().and_then(ast::Module::cast) {
49 if module.has_semi() {
50 if let Some(child_module) =
51 source_binder::module_from_declaration(self, position.file_id, module)?
52 {
53 let file_id = child_module.file_id();
54 let name = match child_module.name() {
55 Some(name) => name.to_string().into(),
56 None => "".into(),
57 };
58 let symbol = NavigationTarget {
59 file_id,
60 name,
61 range: TextRange::offset_len(0.into(), 0.into()),
62 kind: MODULE,
63 ptr: None,
64 };
65 rr.resolves_to.push(symbol);
66 return Ok(Some(rr));
67 }
68 }
69 }
70 }
71 Ok(None)
72
73}