1 //! This module contains an import search functionality that is provided to the assists module.
2 //! Later, this should be moved away to a separate crate that is accessible from the assists module.
5 import_map::{self, ImportKind},
6 AsAssocItem, Crate, MacroDef, ModuleDef, Semantics,
8 use syntax::{ast, AstNode, SyntaxKind::NAME};
11 defs::{Definition, NameClass},
12 symbol_index::{self, FileSymbol},
16 use rustc_hash::FxHashSet;
18 const QUERY_SEARCH_LIMIT: usize = 40;
20 pub fn find_exact_imports<'a>(
21 sema: &Semantics<'a, RootDatabase>,
23 name_to_import: String,
24 ) -> Box<dyn Iterator<Item = Either<ModuleDef, MacroDef>>> {
25 let _p = profile::span("find_exact_imports");
26 Box::new(find_imports(
30 let mut local_query = symbol_index::Query::new(name_to_import.clone());
32 local_query.limit(QUERY_SEARCH_LIMIT);
35 import_map::Query::new(name_to_import)
36 .limit(QUERY_SEARCH_LIMIT)
38 .search_mode(import_map::SearchMode::Equals)
43 pub enum AssocItemSearch {
49 pub fn find_similar_imports<'a>(
50 sema: &Semantics<'a, RootDatabase>,
52 fuzzy_search_string: String,
53 assoc_item_search: AssocItemSearch,
54 ) -> Box<dyn Iterator<Item = Either<ModuleDef, MacroDef>> + 'a> {
55 let _p = profile::span("find_similar_imports");
57 let mut external_query = import_map::Query::new(fuzzy_search_string.clone())
58 .search_mode(import_map::SearchMode::Fuzzy)
60 .limit(QUERY_SEARCH_LIMIT);
62 match assoc_item_search {
63 AssocItemSearch::Include => {}
64 AssocItemSearch::Exclude => {
65 external_query = external_query.exclude_import_kind(ImportKind::AssociatedItem);
67 AssocItemSearch::AssocItemsOnly => {
68 external_query = external_query.assoc_items_only();
72 let mut local_query = symbol_index::Query::new(fuzzy_search_string);
73 local_query.limit(QUERY_SEARCH_LIMIT);
76 Box::new(find_imports(sema, krate, local_query, external_query).filter(
77 move |import_candidate| match assoc_item_search {
78 AssocItemSearch::Include => true,
79 AssocItemSearch::Exclude => !is_assoc_item(import_candidate, db),
80 AssocItemSearch::AssocItemsOnly => is_assoc_item(import_candidate, db),
85 fn is_assoc_item(import_candidate: &Either<ModuleDef, MacroDef>, db: &RootDatabase) -> bool {
86 match import_candidate {
87 Either::Left(ModuleDef::Function(function)) => function.as_assoc_item(db).is_some(),
88 Either::Left(ModuleDef::Const(const_)) => const_.as_assoc_item(db).is_some(),
89 Either::Left(ModuleDef::TypeAlias(type_alias)) => type_alias.as_assoc_item(db).is_some(),
95 sema: &Semantics<'a, RootDatabase>,
97 local_query: symbol_index::Query,
98 external_query: import_map::Query,
99 ) -> impl Iterator<Item = Either<ModuleDef, MacroDef>> {
100 let _p = profile::span("find_similar_imports");
103 // Query dependencies first.
104 let mut candidates: FxHashSet<_> =
105 krate.query_external_importables(db, external_query).collect();
107 // Query the local crate using the symbol index.
108 let local_results = symbol_index::crate_symbols(db, krate.into(), local_query);
113 .filter_map(|import_candidate| get_name_definition(sema, &import_candidate))
114 .filter_map(|name_definition_to_import| match name_definition_to_import {
115 Definition::ModuleDef(module_def) => Some(Either::Left(module_def)),
116 Definition::Macro(macro_def) => Some(Either::Right(macro_def)),
121 candidates.into_iter()
124 fn get_name_definition<'a>(
125 sema: &Semantics<'a, RootDatabase>,
126 import_candidate: &FileSymbol,
127 ) -> Option<Definition> {
128 let _p = profile::span("get_name_definition");
129 let file_id = import_candidate.file_id;
131 let candidate_node = import_candidate.ptr.to_node(sema.parse(file_id).syntax());
132 let candidate_name_node = if candidate_node.kind() != NAME {
133 candidate_node.children().find(|it| it.kind() == NAME)?
137 let name = ast::Name::cast(candidate_name_node)?;
138 NameClass::classify(sema, &name)?.defined(sema.db)