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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::{db::HirDatabase, ModuleDef, SourceBinder};
use ra_prof::profile;
use ra_syntax::{ast, AstNode, SyntaxKind::NAME};
use crate::{
defs::classify_name,
defs::NameKind,
symbol_index::{self, FileSymbol, Query},
RootDatabase,
};
pub struct ImportsLocator<'a> {
source_binder: SourceBinder<'a, RootDatabase>,
}
impl<'a> ImportsLocator<'a> {
pub fn new(db: &'a RootDatabase) -> Self {
Self { source_binder: SourceBinder::new(db) }
}
pub fn find_imports(&mut self, name_to_import: &str) -> Vec<ModuleDef> {
let _p = profile("search_for_imports");
let db = self.source_binder.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(db, &import_candidate))
.filter_map(|name_definition_to_import| match name_definition_to_import {
NameKind::Def(module_def) => Some(module_def),
_ => None,
})
.collect()
}
fn get_name_definition(
&mut self,
db: &impl HirDatabase,
import_candidate: &FileSymbol,
) -> Option<NameKind> {
let _p = profile("get_name_definition");
let file_id = import_candidate.file_id.into();
let candidate_node = import_candidate.ptr.to_node(&db.parse_or_expand(file_id)?);
let candidate_name_node = if candidate_node.kind() != NAME {
candidate_node.children().find(|it| it.kind() == NAME)?
} else {
candidate_node
};
classify_name(
&mut self.source_binder,
hir::InFile { file_id, value: &ast::Name::cast(candidate_name_node)? },
)
.map(|it| it.kind)
}
}
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