Delete site/try

site/try/src/user_option.dart

-// Copyright (c) 2014, 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.
-
-library trydart.userOption;
-
-/// Persistent user-configurable option.
-///
-/// Options included in [options] in settings.dart will automatically be
-/// included in the settings UI unless [isHidden] is true.
-///
-/// The value of an option is persisted in [storage] which is normally the
-/// browser's "localStorage", and [name] is a key in "localStorage".  This
-/// means that hidden options can be controlled by opening the JavaScript
-/// console and evaluate:
-///
-///   localStorage['name'] = value // or
-///   localStorage.name = value
-///
-/// An option can be reset to the default value using:
-///
-///   delete localStorage['name'] // or
-///   delete localStorage.name
-class UserOption {
-  final String name;
-
-  final bool isHidden;
-
-  static var storage;
-
-  const UserOption(this.name, {this.isHidden: false});
-
-  get value => storage[name];
-
-  void set value(newValue) {
-    storage[name] = newValue;
-  }
-
-  void setIfNotInitialized(newValueEvaluator()) {
-    if (storage[name] == null) {
-      value = newValueEvaluator();
-    }
-  }
-}
-
-class BooleanUserOption extends UserOption {
-  const BooleanUserOption(String name, {bool isHidden: false})
-      : super(name, isHidden: isHidden);
-
-  bool get value => super.value == 'true';
-
-  void set value(bool newValue) {
-    super.value = '$newValue';
-  }
-}
-
-class StringUserOption extends UserOption {
-  const StringUserOption(String name, {bool isHidden: false})
-      : super(name, isHidden: isHidden);
-
-  String get value => super.value == null ? '' : super.value;
-
-  void set value(String newValue) {
-    super.value = newValue;
-  }
-}