convert generate_enum_variant to use add_variant

Author: DorianListens

crates/ide-assists/src/handlers/generate_enum_variant.rs

@@ -1,8 +1,8 @@
 use hir::{HasSource, InFile};
 use ide_db::assists::{AssistId, AssistKind};
 use syntax::{
-    ast::{self, edit::IndentLevel},
-    AstNode, TextSize,
+    ast::{self, make},
+    AstNode,
 };
 
 use crate::assist_context::{AssistContext, Assists};
@@ -65,26 +65,16 @@ fn add_variant_to_accumulator(
 ) -> Option<()> {
     let db = ctx.db();
     let InFile { file_id, value: enum_node } = adt.source(db)?.original_ast_node(db)?;
-    let enum_indent = IndentLevel::from_node(&enum_node.syntax());
-
-    let variant_list = enum_node.variant_list()?;
-    let offset = variant_list.syntax().text_range().end() - TextSize::of('}');
-    let empty_enum = variant_list.variants().next().is_none();
 
+    let variant = make::variant(make::name(&name_ref.text()), None);
     acc.add(
         AssistId("generate_enum_variant", AssistKind::Generate),
         "Generate variant",
         target,
         |builder| {
             builder.edit_file(file_id.original_file(db));
-            let text = format!(
-                "{maybe_newline}{indent_1}{name},\n{enum_indent}",
-                maybe_newline = if empty_enum { "\n" } else { "" },
-                indent_1 = IndentLevel(1),
-                name = name_ref,
-                enum_indent = enum_indent
-            );
-            builder.insert(offset, text)
+            let node = builder.make_mut(enum_node);
+            node.variant_list().map(|it| it.add_variant(variant.clone_for_update()));
         },
     )
 }