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.
4 use hir::{import_map, AsAssocItem, Crate, MacroDef, ModuleDef, Semantics};
5 use syntax::{ast, AstNode, SyntaxKind::NAME};
8 defs::{Definition, NameClass},
9 symbol_index::{self, FileSymbol},
13 use rustc_hash::FxHashSet;
15 const QUERY_SEARCH_LIMIT: usize = 40;
17 pub fn find_exact_imports<'a>(
18 sema: &Semantics<'a, RootDatabase>,
20 name_to_import: String,
21 ) -> impl Iterator<Item = Either<ModuleDef, MacroDef>> {
22 let _p = profile::span("find_exact_imports");
27 let mut local_query = symbol_index::Query::new(name_to_import.clone());
29 local_query.limit(QUERY_SEARCH_LIMIT);
32 import_map::Query::new(name_to_import)
33 .limit(QUERY_SEARCH_LIMIT)
35 .search_mode(import_map::SearchMode::Equals)
40 pub fn find_similar_imports<'a>(
41 sema: &Semantics<'a, RootDatabase>,
44 fuzzy_search_string: String,
45 ignore_assoc_items: bool,
47 ) -> impl Iterator<Item = Either<ModuleDef, MacroDef>> + 'a {
48 let _p = profile::span("find_similar_imports");
50 let mut external_query = import_map::Query::new(fuzzy_search_string.clone())
51 .search_mode(import_map::SearchMode::Fuzzy);
53 external_query = external_query.name_only();
56 let mut local_query = symbol_index::Query::new(fuzzy_search_string);
58 if let Some(limit) = limit {
59 local_query.limit(limit);
60 external_query = external_query.limit(limit);
64 find_imports(sema, krate, local_query, external_query).filter(move |import_candidate| {
65 if ignore_assoc_items {
66 match import_candidate {
67 Either::Left(ModuleDef::Function(function)) => function.as_assoc_item(db).is_none(),
68 Either::Left(ModuleDef::Const(const_)) => const_.as_assoc_item(db).is_none(),
69 Either::Left(ModuleDef::TypeAlias(type_alias)) => {
70 type_alias.as_assoc_item(db).is_none()
81 sema: &Semantics<'a, RootDatabase>,
83 local_query: symbol_index::Query,
84 external_query: import_map::Query,
85 ) -> impl Iterator<Item = Either<ModuleDef, MacroDef>> {
86 let _p = profile::span("find_similar_imports");
89 // Query dependencies first.
90 let mut candidates: FxHashSet<_> =
91 krate.query_external_importables(db, external_query).collect();
93 // Query the local crate using the symbol index.
94 let local_results = symbol_index::crate_symbols(db, krate.into(), local_query);
99 .filter_map(|import_candidate| get_name_definition(sema, &import_candidate))
100 .filter_map(|name_definition_to_import| match name_definition_to_import {
101 Definition::ModuleDef(module_def) => Some(Either::Left(module_def)),
102 Definition::Macro(macro_def) => Some(Either::Right(macro_def)),
107 candidates.into_iter()
110 fn get_name_definition<'a>(
111 sema: &Semantics<'a, RootDatabase>,
112 import_candidate: &FileSymbol,
113 ) -> Option<Definition> {
114 let _p = profile::span("get_name_definition");
115 let file_id = import_candidate.file_id;
117 let candidate_node = import_candidate.ptr.to_node(sema.parse(file_id).syntax());
118 let candidate_name_node = if candidate_node.kind() != NAME {
119 candidate_node.children().find(|it| it.kind() == NAME)?
123 let name = ast::Name::cast(candidate_name_node)?;
124 NameClass::classify(sema, &name)?.defined(sema.db)