| // 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. |
| |
| import 'package:analyzer/dart/element/element.dart'; |
| import 'package:analyzer/dart/element/type.dart'; |
| |
| import '../util/dart_type_utilities.dart'; |
| |
| var _collectionInterfaces = <InterfaceTypeDefinition>[ |
| InterfaceTypeDefinition('List', 'dart.core'), |
| InterfaceTypeDefinition('Map', 'dart.core'), |
| InterfaceTypeDefinition('LinkedHashMap', 'dart.collection'), |
| InterfaceTypeDefinition('Set', 'dart.core'), |
| InterfaceTypeDefinition('LinkedHashSet', 'dart.collection'), |
| ]; |
| |
| _Flutter _flutterInstance = _Flutter('flutter', 'package:flutter'); |
| |
| _Flutter get _flutter => _flutterInstance; |
| |
| bool isExactWidget(ClassElement element) => _flutter.isExactWidget(element); |
| |
| bool isExactWidgetTypeContainer(DartType type) => |
| _flutter.isExactWidgetTypeContainer(type); |
| |
| bool isStatefulWidget(ClassElement element) => |
| _flutter.isStatefulWidget(element); |
| |
| bool hasWidgetAsAscendant(ClassElement element) => |
| _flutter.hasWidgetAsAscendant(element); |
| |
| bool isWidgetProperty(DartType type) { |
| if (isWidgetType(type)) { |
| return true; |
| } |
| if (type is InterfaceType && |
| DartTypeUtilities.implementsAnyInterface(type, _collectionInterfaces)) { |
| return type.element.typeParameters.length == 1 && |
| isWidgetProperty(type.typeArguments.first); |
| } |
| return false; |
| } |
| |
| bool isWidgetType(DartType type) => _flutter.isWidgetType(type); |
| |
| /// See: analysis_server/lib/src/utilities/flutter.dart |
| class _Flutter { |
| static const _nameStatefulWidget = 'StatefulWidget'; |
| static const _nameWidget = 'Widget'; |
| static const _nameContainer = 'Container'; |
| |
| final String packageName; |
| final String widgetsUri; |
| |
| final Uri _uriContainer; |
| final Uri _uriFramework; |
| |
| _Flutter(this.packageName, String uriPrefix) |
| : widgetsUri = '$uriPrefix/widgets.dart', |
| _uriContainer = Uri.parse('$uriPrefix/src/widgets/container.dart'), |
| _uriFramework = Uri.parse('$uriPrefix/src/widgets/framework.dart'); |
| |
| bool isExactWidgetTypeContainer(DartType type) => |
| type is InterfaceType && |
| _isExactWidget(type.element, _nameContainer, _uriContainer); |
| |
| bool isExactWidget(ClassElement element) => |
| _isExactWidget(element, _nameWidget, _uriFramework); |
| |
| bool isStatefulWidget(ClassElement element) { |
| if (element == null) { |
| return false; |
| } |
| if (_isExactWidget(element, _nameStatefulWidget, _uriFramework)) { |
| return true; |
| } |
| for (var type in element.allSupertypes) { |
| if (_isExactWidget(type.element, _nameStatefulWidget, _uriFramework)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool isWidget(ClassElement element) { |
| if (element == null) { |
| return false; |
| } |
| if (_isExactWidget(element, _nameWidget, _uriFramework)) { |
| return true; |
| } |
| for (var type in element.allSupertypes) { |
| if (_isExactWidget(type.element, _nameWidget, _uriFramework)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool hasWidgetAsAscendant(ClassElement element, |
| [Set<ClassElement> alreadySeen]) { |
| alreadySeen ??= {}; |
| if (element == null || alreadySeen.contains(element)) { |
| return false; |
| } |
| alreadySeen.add(element); |
| if (_isExactWidget(element, _nameWidget, _uriFramework)) { |
| return true; |
| } |
| return hasWidgetAsAscendant(element.supertype?.element, alreadySeen); |
| } |
| |
| bool isWidgetType(DartType type) => |
| type is InterfaceType && isWidget(type.element); |
| |
| bool _isExactWidget(ClassElement element, String type, Uri uri) => |
| element != null && element.name == type && element.source.uri == uri; |
| } |