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

// Copyright (c) 2020, 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_dart.dart';
import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
import 'package:analyzer_plugin/utilities/range_factory.dart';

class ReplaceWithEightDigitHex extends CorrectionProducer {
  /// The replacement text, used as an argument to the fix message.
  String replacement;

  @override
  List<Object> get fixArguments => [replacement];

  @override
  FixKind get fixKind => DartFixKind.REPLACE_WITH_EIGHT_DIGIT_HEX;

  @override
  Future<void> compute(DartChangeBuilder builder) async {
    //
    // Extract the information needed to build the edit.
    //
    if (node is! IntegerLiteral) {
      return;
    }
    var value = (node as IntegerLiteral).value;
    replacement = '0x' + value.toRadixString(16).padLeft(8, '0');
    //
    // Build the edit.
    //
    await builder.addFileEdit(file, (DartFileEditBuilder builder) {
      builder.addSimpleReplacement(range.node(node), replacement);
    });
  }
}