3 files changed, 29 insertions, 4 deletions

diff --git a/crates/ra_hir/src/code_model_api.rs b/crates/ra_hir/src/code_model_api.rs
index 63e2e34e8..2f968d97c 100644
--- a/crates/ra_hir/src/code_model_api.rs
+++ b/crates/ra_hir/src/code_model_api.rs
@@ -1,4 +1,5 @@
-use ra_db::{CrateId, Cancelable};
+use ra_db::{CrateId, Cancelable, FileId};
+use ra_syntax::ast;
 
 use crate::{Name, db::HirDatabase, DefId};
 
@@ -17,6 +18,9 @@ pub struct CrateDependency {
 }
 
 impl Crate {
+    pub fn crate_id(&self) -> CrateId {
+        self.crate_id
+    }
     pub fn dependencies(&self, db: &impl HirDatabase) -> Vec<CrateDependency> {
         self.dependencies_impl(db)
     }
@@ -31,6 +35,10 @@ pub struct Module {
 }
 
 impl Module {
+    pub fn source(&self, db: &impl HirDatabase) -> (FileId, Option<ast::ModuleNode>) {
+        self.source_impl(db)
+    }
+
     /// Returns the crate this module is part of.
     pub fn krate(&self, db: &impl HirDatabase) -> Cancelable<Option<Crate>> {
         self.krate_impl(db)
diff --git a/crates/ra_hir/src/code_model_impl.rs b/crates/ra_hir/src/code_model_impl.rs
index 659af548c..83ee8186e 100644
--- a/crates/ra_hir/src/code_model_impl.rs
+++ b/crates/ra_hir/src/code_model_impl.rs
@@ -1,4 +1,5 @@
-use ra_db::{CrateId, Cancelable};
+use ra_db::{CrateId, Cancelable, FileId};
+use ra_syntax::{AstNode, ast};
 
 use crate::{HirFileId, db::HirDatabase, Crate, CrateDependency, AsName, DefId, DefLoc, DefKind, Name};
 
@@ -48,6 +49,22 @@ impl Module {
         crate::code_model_api::Module { def_id }
     }
 
+    pub(crate) fn source_impl(&self, db: &impl HirDatabase) -> (FileId, Option<ast::ModuleNode>) {
+        let loc = self.def_id.loc(db);
+        let source_item_id = loc.source_item_id;
+        let module = match source_item_id.item_id {
+            None => None,
+            Some(_) => {
+                let syntax_node = db.file_item(source_item_id);
+                let module = ast::Module::cast(syntax_node.borrowed()).unwrap().owned();
+                Some(module)
+            }
+        };
+        // FIXME: remove `as_original_file` here
+        let file_id = source_item_id.file_id.as_original_file();
+        (file_id, module)
+    }
+
     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);
diff --git a/crates/ra_hir/src/module/nameres/tests.rs b/crates/ra_hir/src/module/nameres/tests.rs
index a6a0bea31..dcbe65aec 100644
--- a/crates/ra_hir/src/module/nameres/tests.rs
+++ b/crates/ra_hir/src/module/nameres/tests.rs
@@ -17,7 +17,7 @@ fn item_map(fixture: &str) -> (Arc<hir::ItemMap>, hir::ModuleId) {
     let module = hir::source_binder::module_from_position(&db, pos)
         .unwrap()
         .unwrap();
-    let module_id = module.module_id;
+    let module_id = module.def_id.loc(&db).module_id;
     (db.item_map(source_root).unwrap(), module_id)
 }
 
@@ -155,7 +155,7 @@ fn item_map_across_crates() {
     let module = hir::source_binder::module_from_file_id(&db, main_id)
         .unwrap()
         .unwrap();
-    let module_id = module.module_id;
+    let module_id = module.def_id.loc(&db).module_id;
     let item_map = db.item_map(source_root).unwrap();
 
     check_module_item_map(