dwds/lib/src/utilities/objects.dart

// Copyright (c) 2019, 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.

/// A library for WebKit mirror objects and support code. These probably should
/// get migrated into webkit_inspection_protocol over time.

import 'package:webkit_inspection_protocol/webkit_inspection_protocol.dart';

/// Represents a property of an object.
class Property {
  final Map<String, dynamic>? _map;

  RemoteObject? _remoteObjectValue;

  Property(this._map);

  Map<String, dynamic>? get map => _map;

  /// The remote object value in unwrapped form.
  ///
  /// Useful for getting access to properties of particular types of
  /// RemoteObject.
  Object? get rawValue => _map == null ? null : _map!['value'];

  /// Remote object value in case of primitive values or JSON values (if it was
  /// requested). (optional)
  RemoteObject? get value {
    if (_remoteObjectValue != null) return _remoteObjectValue!;
    if (_map == null) return null;
    if (rawValue == null) return null;
    final val = _map!['value'];
    if (val is RemoteObject) {
      _remoteObjectValue = val;
    } else {
      _remoteObjectValue = RemoteObject(val as Map<String, dynamic>);
    }
    return _remoteObjectValue;
  }

  /// The name of the property
  String? get name {
    if (_map == null) return null;
    if (rawName == null) return null;
    const prefix = 'Symbol(';
    var nonSymbol = (rawName!.startsWith(prefix))
        ? rawName!.substring(prefix.length, rawName!.length - 1)
        : rawName!;
    // Adjust names for late fields:
    // '_#MyTestClass#myselfField' -> 'myselfField'
    // TODO(annagrin): Use debug symbols to map from dart to JS symbols.
    // https://github.com/dart-lang/sdk/issues/40273
    nonSymbol = nonSymbol.split('#').last;
    return nonSymbol.split('.').last;
  }

  /// The raw name of the property in JS.
  ///
  /// Will be of the form 'Symbol(_actualName)' for private fields.
  String? get rawName {
    if (_map == null) return null;
    return _map!['name'] as String;
  }

  @override
  String toString() => '$name $value';
}