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//! This module contains an import search funcionality that is provided to the ra_assists module.
//! Later, this should be moved away to a separate crate that is accessible from the ra_assists module.
use hir::{ModuleDef, Semantics};
use ra_prof::profile;
use ra_syntax::{ast, AstNode, SyntaxKind::NAME};
use crate::{
defs::{classify_name, NameDefinition},
symbol_index::{self, FileSymbol, Query},
RootDatabase,
};
pub struct ImportsLocator<'a> {
sema: Semantics<'a, RootDatabase>,
}
impl<'a> ImportsLocator<'a> {
pub fn new(db: &'a RootDatabase) -> Self {
Self { sema: Semantics::new(db) }
}
pub fn find_imports(&mut self, name_to_import: &str) -> Vec<ModuleDef> {
let _p = profile("search_for_imports");
let db = self.sema.db;
let project_results = {
let mut query = Query::new(name_to_import.to_string());
query.exact();
query.limit(40);
symbol_index::world_symbols(db, query)
};
let lib_results = {
let mut query = Query::new(name_to_import.to_string());
query.libs();
query.exact();
query.limit(40);
symbol_index::world_symbols(db, query)
};
project_results
.into_iter()
.chain(lib_results.into_iter())
.filter_map(|import_candidate| self.get_name_definition(&import_candidate))
.filter_map(|name_definition_to_import| match name_definition_to_import {
NameDefinition::ModuleDef(module_def) => Some(module_def),
_ => None,
})
.collect()
}
fn get_name_definition(&mut self, import_candidate: &FileSymbol) -> Option<NameDefinition> {
let _p = profile("get_name_definition");
let file_id = import_candidate.file_id;
let candidate_node = import_candidate.ptr.to_node(self.sema.parse(file_id).syntax());
let candidate_name_node = if candidate_node.kind() != NAME {
candidate_node.children().find(|it| it.kind() == NAME)?
} else {
candidate_node
};
classify_name(&self.sema, &ast::Name::cast(candidate_name_node)?)
}
}
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