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use ra_db::FileId;
use ra_syntax::{ast, TreeArc, AstNode};
use crate::{
Module, ModuleSource, Name,
nameres::{CrateModuleId, ImportId},
HirDatabase, DefDatabase,
HirFileId, SourceItemId,
};
impl ModuleSource {
pub(crate) fn new(
db: &impl DefDatabase,
file_id: Option<FileId>,
decl_id: Option<SourceItemId>,
) -> ModuleSource {
match (file_id, decl_id) {
(Some(file_id), _) => {
let source_file = db.parse(file_id);
ModuleSource::SourceFile(source_file)
}
(None, Some(item_id)) => {
let module = db.file_item(item_id);
let module = ast::Module::cast(&*module).unwrap();
assert!(module.item_list().is_some(), "expected inline module");
ModuleSource::Module(module.to_owned())
}
(None, None) => panic!(),
}
}
}
impl Module {
fn with_module_id(&self, module_id: CrateModuleId) -> Module {
Module { module_id, krate: self.krate }
}
pub(crate) fn name_impl(&self, db: &impl HirDatabase) -> Option<Name> {
let def_map = db.crate_def_map(self.krate);
let parent = def_map[self.module_id].parent?;
def_map[parent].children.iter().find_map(|(name, module_id)| {
if *module_id == self.module_id {
Some(name.clone())
} else {
None
}
})
}
pub(crate) fn definition_source_impl(
&self,
db: &impl DefDatabase,
) -> (HirFileId, ModuleSource) {
let def_map = db.crate_def_map(self.krate);
let decl_id = def_map[self.module_id].declaration;
let file_id = def_map[self.module_id].definition;
let module_source = ModuleSource::new(db, file_id, decl_id);
let file_id = file_id.map(HirFileId::from).unwrap_or_else(|| decl_id.unwrap().file_id);
(file_id, module_source)
}
pub(crate) fn declaration_source_impl(
&self,
db: &impl HirDatabase,
) -> Option<(HirFileId, TreeArc<ast::Module>)> {
let def_map = db.crate_def_map(self.krate);
let decl = def_map[self.module_id].declaration?;
let syntax_node = db.file_item(decl);
let ast = ast::Module::cast(&syntax_node).unwrap().to_owned();
Some((decl.file_id, ast))
}
pub(crate) fn import_source_impl(
&self,
db: &impl HirDatabase,
import: ImportId,
) -> TreeArc<ast::PathSegment> {
let (file_id, source) = self.definition_source(db);
let (_, source_map) = db.raw_items_with_source_map(file_id.original_file(db));
source_map.get(&source, import)
}
pub(crate) fn crate_root_impl(&self, db: &impl DefDatabase) -> Module {
let def_map = db.crate_def_map(self.krate);
self.with_module_id(def_map.root())
}
/// Finds a child module with the specified name.
pub(crate) fn child_impl(&self, db: &impl HirDatabase, name: &Name) -> Option<Module> {
let def_map = db.crate_def_map(self.krate);
let child_id = def_map[self.module_id].children.get(name)?;
Some(self.with_module_id(*child_id))
}
/// Iterates over all child modules.
pub(crate) fn children_impl(&self, db: &impl DefDatabase) -> impl Iterator<Item = Module> {
let def_map = db.crate_def_map(self.krate);
let children = def_map[self.module_id]
.children
.iter()
.map(|(_, module_id)| self.with_module_id(*module_id))
.collect::<Vec<_>>();
children.into_iter()
}
pub(crate) fn parent_impl(&self, db: &impl DefDatabase) -> Option<Module> {
let def_map = db.crate_def_map(self.krate);
let parent_id = def_map[self.module_id].parent?;
Some(self.with_module_id(parent_id))
}
}
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