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use ra_db::FileId;
use ra_syntax::ast;
use crate::db::RootDatabase;
pub fn goto_defenition(db: &RootDatabase, position: FilePosition,
) -> Cancelable<Option<Vec<NavigationTarget>>> {
let file = db.source_file(position.file_id);
let syntax = file.syntax();
if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
return Ok(Some(reference_defenition(db, position.file_id, name_ref)));
}
if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
return Ok(Some(name_defenition(db, position.file_idname)));
}
Ok(None)
}
fn reference_defenition(db: &RootDatabase, file_id: FileId, name_ref: ast::NameRef) -> Cancelable<Vec<Nav>> {
if let Some(name_ref) = find_node_at_offset::<ast::NameRef>(syntax, position.offset) {
let mut rr = ReferenceResolution::new(name_ref.syntax().range());
if let Some(fn_descr) =
source_binder::function_from_child_node(self, position.file_id, name_ref.syntax())?
{
let scope = fn_descr.scopes(self);
// First try to resolve the symbol locally
if let Some(entry) = scope.resolve_local_name(name_ref) {
rr.resolves_to.push(NavigationTarget {
file_id: position.file_id,
name: entry.name().to_string().into(),
range: entry.ptr().range(),
kind: NAME,
ptr: None,
});
return Ok(Some(rr));
};
}
// If that fails try the index based approach.
rr.resolves_to.extend(
self.index_resolve(name_ref)?
.into_iter()
.map(NavigationTarget::from_symbol),
);
return Ok(Some(rr));
}
if let Some(name) = find_node_at_offset::<ast::Name>(syntax, position.offset) {
let mut rr = ReferenceResolution::new(name.syntax().range());
if let Some(module) = name.syntax().parent().and_then(ast::Module::cast) {
if module.has_semi() {
if let Some(child_module) =
source_binder::module_from_declaration(self, position.file_id, module)?
{
let file_id = child_module.file_id();
let name = match child_module.name() {
Some(name) => name.to_string().into(),
None => "".into(),
};
let symbol = NavigationTarget {
file_id,
name,
range: TextRange::offset_len(0.into(), 0.into()),
kind: MODULE,
ptr: None,
};
rr.resolves_to.push(symbol);
return Ok(Some(rr));
}
}
}
}
Ok(None)
}
|
