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use ra_db::{Cancelable, SourceRootId, FileId};
use ra_syntax::{ast, SyntaxNode, AstNode, TreePtr};
use crate::{
Module, ModuleSource, Problem,
Crate, DefId, DefLoc, DefKind, Name, Path, PathKind, PerNs, Def,
module_tree::ModuleId,
nameres::ModuleScope,
db::HirDatabase,
};
impl Module {
pub(crate) fn new(def_id: DefId) -> Self {
crate::code_model_api::Module { def_id }
}
pub(crate) fn from_module_id(
db: &impl HirDatabase,
source_root_id: SourceRootId,
module_id: ModuleId,
) -> Cancelable<Self> {
let module_tree = db.module_tree(source_root_id)?;
let def_loc = DefLoc {
kind: DefKind::Module,
source_root_id,
module_id,
source_item_id: module_id.source(&module_tree),
};
let def_id = def_loc.id(db);
let module = Module::new(def_id);
Ok(module)
}
pub(crate) fn name_impl(&self, db: &impl HirDatabase) -> Cancelable<Option<Name>> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
let link = ctry!(loc.module_id.parent_link(&module_tree));
Ok(Some(link.name(&module_tree).clone()))
}
pub fn defenition_source_impl(
&self,
db: &impl HirDatabase,
) -> Cancelable<(FileId, ModuleSource)> {
let loc = self.def_id.loc(db);
let file_id = loc.source_item_id.file_id.as_original_file();
let syntax_node = db.file_item(loc.source_item_id);
let module_source = if let Some(source_file) = ast::SourceFile::cast(&syntax_node) {
ModuleSource::SourceFile(source_file.to_owned())
} else {
let module = ast::Module::cast(&syntax_node).unwrap();
ModuleSource::Module(module.to_owned())
};
Ok((file_id, module_source))
}
pub fn declaration_source_impl(
&self,
db: &impl HirDatabase,
) -> Cancelable<Option<(FileId, TreePtr<ast::Module>)>> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
let link = ctry!(loc.module_id.parent_link(&module_tree));
let file_id = link
.owner(&module_tree)
.source(&module_tree)
.file_id
.as_original_file();
let src = link.source(&module_tree, db);
Ok(Some((file_id, src)))
}
pub(crate) fn krate_impl(&self, db: &impl HirDatabase) -> Cancelable<Option<Crate>> {
let root = self.crate_root(db)?;
let loc = root.def_id.loc(db);
let file_id = loc.source_item_id.file_id.as_original_file();
let crate_graph = db.crate_graph();
let crate_id = ctry!(crate_graph.crate_id_for_crate_root(file_id));
Ok(Some(Crate::new(crate_id)))
}
pub(crate) fn crate_root_impl(&self, db: &impl HirDatabase) -> Cancelable<Module> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
let module_id = loc.module_id.crate_root(&module_tree);
Module::from_module_id(db, loc.source_root_id, module_id)
}
/// Finds a child module with the specified name.
pub fn child_impl(&self, db: &impl HirDatabase, name: &Name) -> Cancelable<Option<Module>> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
let child_id = ctry!(loc.module_id.child(&module_tree, name));
Module::from_module_id(db, loc.source_root_id, child_id).map(Some)
}
pub fn parent_impl(&self, db: &impl HirDatabase) -> Cancelable<Option<Module>> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
let parent_id = ctry!(loc.module_id.parent(&module_tree));
Module::from_module_id(db, loc.source_root_id, parent_id).map(Some)
}
/// Returns a `ModuleScope`: a set of items, visible in this module.
pub fn scope_impl(&self, db: &impl HirDatabase) -> Cancelable<ModuleScope> {
let loc = self.def_id.loc(db);
let item_map = db.item_map(loc.source_root_id)?;
let res = item_map.per_module[&loc.module_id].clone();
Ok(res)
}
pub fn resolve_path_impl(
&self,
db: &impl HirDatabase,
path: &Path,
) -> Cancelable<PerNs<DefId>> {
let mut curr_per_ns = PerNs::types(
match path.kind {
PathKind::Crate => self.crate_root(db)?,
PathKind::Self_ | PathKind::Plain => self.clone(),
PathKind::Super => {
if let Some(p) = self.parent(db)? {
p
} else {
return Ok(PerNs::none());
}
}
}
.def_id,
);
let segments = &path.segments;
for name in segments.iter() {
let curr = if let Some(r) = curr_per_ns.as_ref().take_types() {
r
} else {
return Ok(PerNs::none());
};
let module = match curr.resolve(db)? {
Def::Module(it) => it,
// TODO here would be the place to handle enum variants...
_ => return Ok(PerNs::none()),
};
let scope = module.scope(db)?;
curr_per_ns = if let Some(r) = scope.get(&name) {
r.def_id
} else {
return Ok(PerNs::none());
};
}
Ok(curr_per_ns)
}
pub fn problems_impl(
&self,
db: &impl HirDatabase,
) -> Cancelable<Vec<(TreePtr<SyntaxNode>, Problem)>> {
let loc = self.def_id.loc(db);
let module_tree = db.module_tree(loc.source_root_id)?;
Ok(loc.module_id.problems(&module_tree, db))
}
}
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