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//! Finds a corresponding hir data structure for a syntax node in a specific
//! file.
use hir_def::{nameres::ModuleSource, ModuleId};
use hir_expand::name::AsName;
use ra_db::FileId;
use ra_prof::profile;
use ra_syntax::ast::{self, AstNode, NameOwner};
use crate::{db::DefDatabase, InFile, Module};
impl Module {
pub fn from_declaration(db: &impl DefDatabase, src: InFile<ast::Module>) -> Option<Self> {
let _p = profile("Module::from_declaration");
let parent_declaration = src.value.syntax().ancestors().skip(1).find_map(ast::Module::cast);
let parent_module = match parent_declaration {
Some(parent_declaration) => {
let src_parent = InFile { file_id: src.file_id, value: parent_declaration };
Module::from_declaration(db, src_parent)
}
None => {
let source_file = db.parse(src.file_id.original_file(db)).tree();
let src_parent =
InFile { file_id: src.file_id, value: ModuleSource::SourceFile(source_file) };
Module::from_definition(db, src_parent)
}
}?;
let child_name = src.value.name()?.as_name();
let def_map = db.crate_def_map(parent_module.id.krate);
let child_id = def_map[parent_module.id.local_id].children.get(&child_name)?;
Some(parent_module.with_module_id(*child_id))
}
pub fn from_definition(db: &impl DefDatabase, src: InFile<ModuleSource>) -> Option<Self> {
let _p = profile("Module::from_definition");
match src.value {
ModuleSource::Module(ref module) => {
assert!(!module.has_semi());
return Module::from_declaration(
db,
InFile { file_id: src.file_id, value: module.clone() },
);
}
ModuleSource::SourceFile(_) => (),
};
let original_file = src.file_id.original_file(db);
Module::from_file(db, original_file)
}
fn from_file(db: &impl DefDatabase, file: FileId) -> Option<Self> {
let _p = profile("Module::from_file");
let (krate, local_id) = db.relevant_crates(file).iter().find_map(|&crate_id| {
let crate_def_map = db.crate_def_map(crate_id);
let local_id = crate_def_map.modules_for_file(file).next()?;
Some((crate_id, local_id))
})?;
Some(Module { id: ModuleId { krate, local_id } })
}
}
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