blob: 83ff3ba5a234e8db0b250115af5dae8e8b1b6384 [file] [log] [blame]
// 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_core.dart';
import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
import 'package:analyzer_plugin/utilities/range_factory.dart';
class ReplaceWithConditionalAssignment extends CorrectionProducer {
@override
FixKind get fixKind => DartFixKind.REPLACE_WITH_CONDITIONAL_ASSIGNMENT;
@override
Future<void> compute(ChangeBuilder builder) async {
IfStatement ifStatement =
node is IfStatement ? node : node.thisOrAncestorOfType<IfStatement>();
if (ifStatement == null) {
return;
}
var thenStatement = ifStatement.thenStatement;
Statement uniqueStatement(Statement statement) {
if (statement is Block) {
return uniqueStatement(statement.statements.first);
}
return statement;
}
thenStatement = uniqueStatement(thenStatement);
if (thenStatement is ExpressionStatement) {
final expression = thenStatement.expression.unParenthesized;
if (expression is AssignmentExpression) {
await builder.addDartFileEdit(file, (builder) {
builder.addReplacement(range.node(ifStatement), (builder) {
builder.write(utils.getNodeText(expression.leftHandSide));
builder.write(' ??= ');
builder.write(utils.getNodeText(expression.rightHandSide));
builder.write(';');
});
});
}
}
}
/// Return an instance of this class. Used as a tear-off in `FixProcessor`.
static ReplaceWithConditionalAssignment newInstance() =>
ReplaceWithConditionalAssignment();
}