add file items query

crates/ra_analysis/src/db.rs

@@ -7,10 +7,7 @@ use salsa::{self, Database};
 
 use crate::{
     db,
-    descriptors::{
-        DescriptorDatabase, FnScopesQuery, FnSyntaxQuery, ModuleTreeQuery,
-        SubmodulesQuery, ItemMapQuery, InputModuleItemsQuery,
-    },
+    descriptors,
     symbol_index::SymbolIndex,
     syntax_ptr::SyntaxPtr,
     loc2id::{IdMaps, IdDatabase},
@@ -125,13 +122,15 @@ salsa::database_storage! {
             fn file_symbols() for FileSymbolsQuery;
             fn resolve_syntax_ptr() for ResolveSyntaxPtrQuery;
         }
-        impl DescriptorDatabase {
-            fn module_tree() for ModuleTreeQuery;
-            fn fn_scopes() for FnScopesQuery;
-            fn _input_module_items() for InputModuleItemsQuery;
-            fn _item_map() for ItemMapQuery;
-            fn _fn_syntax() for FnSyntaxQuery;
-            fn _submodules() for SubmodulesQuery;
+        impl descriptors::DescriptorDatabase {
+            fn module_tree() for descriptors::ModuleTreeQuery;
+            fn fn_scopes() for descriptors::FnScopesQuery;
+            fn _file_items() for descriptors::FileItemsQuery;
+            fn _file_item() for descriptors::FileItemQuery;
+            fn _input_module_items() for descriptors::InputModuleItemsQuery;
+            fn _item_map() for descriptors::ItemMapQuery;
+            fn _fn_syntax() for descriptors::FnSyntaxQuery;
+            fn _submodules() for descriptors::SubmodulesQuery;
         }
     }
 }

crates/ra_analysis/src/descriptors/mod.rs

@@ -6,13 +6,14 @@ use std::sync::Arc;
 
 use ra_syntax::{
     ast::{self, FnDefNode, AstNode},
-    TextRange,
+    TextRange, SyntaxNode,
 };
 
 use crate::{
+    FileId,
     db::SyntaxDatabase,
     descriptors::function::{resolve_local_name, FnId, FnScopes},
-    descriptors::module::{ModuleId, ModuleTree, ModuleSource, nameres::{ItemMap, InputModuleItems}},
+    descriptors::module::{ModuleId, ModuleTree, ModuleSource, nameres::{ItemMap, InputModuleItems, FileItemId}},
     input::SourceRootId,
     loc2id::IdDatabase,
     syntax_ptr::LocalSyntaxPtr,
@@ -28,6 +29,18 @@ salsa::query_group! {
             use fn function::imp::fn_scopes;
         }
 
+        fn _file_items(file_id: FileId) -> Arc<Vec<SyntaxNode>> {
+            type FileItemsQuery;
+            storage volatile;
+            use fn module::nameres::file_items;
+        }
+
+        fn _file_item(file_id: FileId, file_item_id: FileItemId) -> SyntaxNode {
+            type FileItemQuery;
+            storage volatile;
+            use fn module::nameres::file_item;
+        }
+
         fn _input_module_items(source_root_id: SourceRootId, module_id: ModuleId) -> Cancelable<Arc<InputModuleItems>> {
             type InputModuleItemsQuery;
             use fn module::nameres::input_module_items;

crates/ra_analysis/src/descriptors/module/nameres.rs

@@ -22,12 +22,13 @@ use std::{
 use rustc_hash::FxHashMap;
 
 use ra_syntax::{
+    SyntaxNode,
     SmolStr, SyntaxKind::{self, *},
     ast::{self, ModuleItemOwner}
 };
 
 use crate::{
-    Cancelable,
+    Cancelable, FileId,
     loc2id::{DefId, DefLoc},
     descriptors::{
         Path, PathKind,
@@ -38,6 +39,20 @@ use crate::{
     input::SourceRootId,
 };
 
+
+#[derive(Clone, Copy, Hash, PartialEq, Eq, Debug)]
+pub(crate) struct FileItemId(u32);
+
+pub(crate) fn file_items(db: &impl DescriptorDatabase, file_id: FileId) -> Arc<Vec<SyntaxNode>> {
+    unimplemented!()
+}
+
+pub(crate) fn file_item(db: &impl DescriptorDatabase, file_id: FileId, file_item_id: FileItemId) -> SyntaxNode {
+    let items = db._file_items(file_id);
+    let idx = file_item_id.0 as usize;
+    items[idx].clone()
+}
+
 /// Item map is the result of the name resolution. Item map contains, for each
 /// module, the set of visible items.
 #[derive(Default, Debug, PartialEq, Eq)]