move res completion to presentation

crates/ra_ide_api/src/completion/complete_path.rs

@@ -1,8 +1,8 @@
 use hir::Resolution;
-use ra_syntax::{AstNode, ast::NameOwner};
+use ra_syntax::AstNode;
 use test_utils::tested_by;
 
-use crate::completion::{CompletionItem, Completions, CompletionKind, CompletionContext};
+use crate::completion::{Completions, CompletionContext};
 
 pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
     let path = match &ctx.path_prefix {
@@ -27,14 +27,7 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                         }
                     }
                 }
-
+                acc.add_resolution(ctx, name.to_string(), &res.def.map(hir::Resolution::Def));
-                CompletionItem::new(
-                    CompletionKind::Reference,
-                    ctx.source_range(),
-                    name.to_string(),
-                )
-                .from_resolution(ctx, &res.def.map(hir::Resolution::Def))
-                .add_to(acc);
             }
         }
         hir::ModuleDef::Enum(e) => {
@@ -52,30 +45,8 @@ pub(super) fn complete_path(acc: &mut Completions, ctx: &CompletionContext) {
                             acc.add_function(ctx, func);
                         }
                     }
-                    hir::ImplItem::Const(ct) => {
+                    hir::ImplItem::Const(ct) => acc.add_const(ctx, ct),
-                        let source = ct.source(ctx.db);
+                    hir::ImplItem::Type(ty) => acc.add_type(ctx, ty),
-                        if let Some(name) = source.1.name() {
-                            CompletionItem::new(
-                                CompletionKind::Reference,
-                                ctx.source_range(),
-                                name.text().to_string(),
-                            )
-                            .from_const(ctx, ct)
-                            .add_to(acc);
-                        }
-                    }
-                    hir::ImplItem::Type(ty) => {
-                        let source = ty.source(ctx.db);
-                        if let Some(name) = source.1.name() {
-                            CompletionItem::new(
-                                CompletionKind::Reference,
-                                ctx.source_range(),
-                                name.text().to_string(),
-                            )
-                            .from_type(ctx, ty)
-                            .add_to(acc);
-                        }
-                    }
                 }
                 None::<()>
             });

crates/ra_ide_api/src/completion/complete_scope.rs

@@ -1,4 +1,4 @@
-use crate::completion::{CompletionItem, Completions, CompletionKind, CompletionContext};
+use crate::completion::{Completions, CompletionContext};
 
 pub(super) fn complete_scope(acc: &mut Completions, ctx: &CompletionContext) {
     if !ctx.is_trivial_path {
@@ -6,11 +6,7 @@ pub(super) fn complete_scope(acc: &mut Completions, ctx: &CompletionContext) {
     }
     let names = ctx.resolver.all_names(ctx.db);
 
-    names.into_iter().for_each(|(name, res)| {
+    names.into_iter().for_each(|(name, res)| acc.add_resolution(ctx, name.to_string(), &res));
-        CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.to_string())
-            .from_resolution(ctx, &res)
-            .add_to(acc)
-    });
 }
 
 #[cfg(test)]

crates/ra_ide_api/src/completion/presentation.rs

@@ -1,7 +1,8 @@
 //! This modules takes care of rendering various defenitions as completion items.
 use join_to_string::join;
 use test_utils::tested_by;
-use hir::Docs;
+use hir::{Docs, PerNs, Resolution};
+use ra_syntax::ast::NameOwner;
 
 use crate::completion::{
     Completions, CompletionKind, CompletionItemKind, CompletionContext, CompletionItem,
@@ -33,6 +34,17 @@ impl Completions {
             .add_to(self);
     }
 
+    pub(crate) fn add_resolution(
+        &mut self,
+        ctx: &CompletionContext,
+        local_name: String,
+        res: &PerNs<Resolution>,
+    ) {
+        CompletionItem::new(CompletionKind::Reference, ctx.source_range(), local_name)
+            .from_resolution(ctx, res)
+            .add_to(self);
+    }
+
     pub(crate) fn add_function(&mut self, ctx: &CompletionContext, func: hir::Function) {
         let sig = func.signature(ctx.db);
 
@@ -62,6 +74,28 @@ impl Completions {
         self.add(builder)
     }
 
+    pub(crate) fn add_const(&mut self, ctx: &CompletionContext, constant: hir::Const) {
+        let (_file_id, cosnt_def) = constant.source(ctx.db);
+        let name = match cosnt_def.name() {
+            Some(name) => name,
+            _ => return,
+        };
+        CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.text().to_string())
+            .from_const(ctx, constant)
+            .add_to(self);
+    }
+
+    pub(crate) fn add_type(&mut self, ctx: &CompletionContext, type_alias: hir::Type) {
+        let (_file_id, type_def) = type_alias.source(ctx.db);
+        let name = match type_def.name() {
+            Some(name) => name,
+            _ => return,
+        };
+        CompletionItem::new(CompletionKind::Reference, ctx.source_range(), name.text().to_string())
+            .from_type(ctx, type_alias)
+            .add_to(self);
+    }
+
     pub(crate) fn add_enum_variant(&mut self, ctx: &CompletionContext, variant: hir::EnumVariant) {
         let name = match variant.name(ctx.db) {
             Some(it) => it,