pkg/analysis_server/lib/src/services/correction/dart/remove_unnecessary_parentheses.dart

// Copyright (c) 2021, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:analysis_server/src/services/correction/dart/abstract_producer.dart';
import 'package:analysis_server/src/services/correction/fix.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer_plugin/utilities/change_builder/change_builder_core.dart';
import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
import 'package:analyzer_plugin/utilities/range_factory.dart';

class RemoveUnnecessaryParentheses extends CorrectionProducer {
  @override
  bool get canBeAppliedInBulk => true;

  @override
  bool get canBeAppliedToFile => true;

  @override
  FixKind get fixKind => DartFixKind.REMOVE_UNNECESSARY_PARENTHESES;

  @override
  FixKind get multiFixKind => DartFixKind.REMOVE_UNNECESSARY_PARENTHESES_MULTI;

  @override
  Future<void> compute(ChangeBuilder builder) async {
    var outer = coveredNode;
    if (outer is ParenthesizedExpression &&
        outer.parent is! ParenthesizedExpression) {
      var left = outer.leftParenthesis;

      await builder.addDartFileEdit(file, (builder) {
        builder.addReplacement(range.token(left), (builder) {
          if ((left.previous?.isKeywordOrIdentifier ?? false) &&
              left.previous?.end == left.offset) {
            builder.write(' ');
          }
        });
        builder.addDeletion(range.token(outer.rightParenthesis));
      });
    }
  }
}