Add config setting for self-on-the-fly

crates/ide_completion/src/completions/dot.rs

@@ -30,7 +30,7 @@ pub(crate) fn complete_dot(acc: &mut Completions, ctx: &CompletionContext) {
 }
 
 fn complete_undotted_self(acc: &mut Completions, ctx: &CompletionContext) {
-    if !ctx.is_trivial_path {
+    if !ctx.is_trivial_path || !ctx.config.enable_self_on_the_fly {
         return;
     }
     ctx.scope.process_all_names(&mut |name, def| {

crates/ide_completion/src/config.rs

@@ -10,6 +10,7 @@ use ide_db::helpers::{insert_use::InsertUseConfig, SnippetCap};
 pub struct CompletionConfig {
     pub enable_postfix_completions: bool,
     pub enable_imports_on_the_fly: bool,
+    pub enable_self_on_the_fly: bool,
     pub add_call_parenthesis: bool,
     pub add_call_argument_snippets: bool,
     pub snippet_cap: Option<SnippetCap>,

crates/ide_completion/src/render.rs

@@ -139,7 +139,7 @@ impl<'a> Render<'a> {
         let mut item = CompletionItem::new(
             CompletionKind::Reference,
             self.ctx.source_range(),
-            receiver.map_or_else(|| name.to_string(), |receiver| format!("{}.{}", receiver, name)),
+            receiver.map_or_else(|| name.clone(), |receiver| format!("{}.{}", receiver, name)),
         );
         item.kind(SymbolKind::Field)
             .detail(ty.display(self.ctx.db()).to_string())

crates/ide_completion/src/test_utils.rs

@@ -19,6 +19,7 @@ use crate::{item::CompletionKind, CompletionConfig, CompletionItem};
 pub(crate) const TEST_CONFIG: CompletionConfig = CompletionConfig {
     enable_postfix_completions: true,
     enable_imports_on_the_fly: true,
+    enable_self_on_the_fly: true,
     add_call_parenthesis: true,
     add_call_argument_snippets: true,
     snippet_cap: SnippetCap::new(true),