pkg/analyzer_plugin/lib/src/utilities/folding/folding.dart

// Copyright (c) 2017, 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:analyzer/dart/analysis/results.dart';
import 'package:analyzer/file_system/file_system.dart';
import 'package:analyzer/src/generated/source.dart';
import 'package:analyzer_plugin/protocol/protocol_common.dart'
    hide AnalysisError;
import 'package:analyzer_plugin/utilities/folding/folding.dart';

/// A concrete implementation of [DartFoldingRequest].
class DartFoldingRequestImpl implements DartFoldingRequest {
  @override
  final ResourceProvider resourceProvider;

  @override
  final ResolvedUnitResult result;

  /// Initialize a newly create request with the given data.
  DartFoldingRequestImpl(this.resourceProvider, this.result);

  @override
  String get path => result.path;
}

/// A concrete implementation of [FoldingCollector].
class FoldingCollectorImpl implements FoldingCollector {
  /// The list of folding regions that have been collected.
  List<FoldingRegion> regions = <FoldingRegion>[];

  /// Initialize a newly created collector.
  FoldingCollectorImpl();

  @override
  void addRange(SourceRange range, FoldingKind kind) {
    addRegion(range.offset, range.length, kind);
  }

  @override
  void addRegion(int offset, int length, FoldingKind kind) {
    regions.add(FoldingRegion(kind, offset, length));
  }
}