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// 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/source/source_range.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 RemoveNameFromCombinator extends CorrectionProducer {
String _combinatorKind;
@override
List<Object> get fixArguments => [_combinatorKind];
@override
FixKind get fixKind => DartFixKind.REMOVE_NAME_FROM_COMBINATOR;
@override
Future<void> compute(ChangeBuilder builder) async {
SourceRange rangeForCombinator(Combinator combinator) {
var parent = combinator.parent;
if (parent is NamespaceDirective) {
var combinators = parent.combinators;
if (combinators.length == 1) {
var previousToken =
combinator.parent.findPrevious(combinator.beginToken);
if (previousToken != null) {
return range.endEnd(previousToken, combinator);
}
return null;
}
var index = combinators.indexOf(combinator);
if (index < 0) {
return null;
} else if (index == combinators.length - 1) {
return range.endEnd(combinators[index - 1], combinator);
}
return range.startStart(combinator, combinators[index + 1]);
}
return null;
}
SourceRange rangeForNameInCombinator(
Combinator combinator, SimpleIdentifier name) {
NodeList<SimpleIdentifier> names;
if (combinator is HideCombinator) {
names = combinator.hiddenNames;
} else if (combinator is ShowCombinator) {
names = combinator.shownNames;
} else {
return null;
}
if (names.length == 1) {
return rangeForCombinator(combinator);
}
var index = names.indexOf(name);
if (index < 0) {
return null;
} else if (index == names.length - 1) {
return range.endEnd(names[index - 1], name);
}
return range.startStart(name, names[index + 1]);
}
var node = coveredNode;
if (node is SimpleIdentifier) {
var parent = coveredNode.parent;
if (parent is Combinator) {
var rangeToRemove = rangeForNameInCombinator(parent, node);
if (rangeToRemove == null) {
return;
}
await builder.addDartFileEdit(file, (builder) {
builder.addDeletion(rangeToRemove);
});
_combinatorKind = parent is HideCombinator ? 'hide' : 'show';
}
}
}
/// Return an instance of this class. Used as a tear-off in `FixProcessor`.
static RemoveNameFromCombinator newInstance() => RemoveNameFromCombinator();
}