| // Copyright (c) 2015, 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 'dart:async'; |
| |
| import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart'; |
| import 'package:analysis_server/src/services/completion/dart/suggestion_builder.dart'; |
| import 'package:analyzer/dart/ast/ast.dart'; |
| import 'package:analyzer/dart/element/element.dart'; |
| import 'package:analyzer_plugin/protocol/protocol_common.dart' hide Element; |
| |
| /// A contributor that produces suggestions based on the named constructors |
| /// defined on a given class. More concretely, this class produces suggestions |
| /// for expressions of the form `C.^` or `C<E>.^`, where `C` is the name of a |
| /// class. |
| class NamedConstructorContributor extends DartCompletionContributor { |
| @override |
| Future<List<CompletionSuggestion>> computeSuggestions( |
| DartCompletionRequest request, SuggestionBuilder builder) async { |
| var node = request.target.containingNode; |
| var libraryElement = request.libraryElement; |
| if (libraryElement == null) { |
| return const <CompletionSuggestion>[]; |
| } |
| |
| // Build the list of suggestions |
| if (node is ConstructorName) { |
| var typeName = node.type; |
| if (typeName != null) { |
| var type = typeName.type; |
| if (type != null) { |
| var element = type.element; |
| if (element is ClassElement) { |
| return _buildSuggestions(request, libraryElement, element); |
| } |
| } |
| } |
| } |
| return const <CompletionSuggestion>[]; |
| } |
| |
| List<CompletionSuggestion> _buildSuggestions(DartCompletionRequest request, |
| LibraryElement libElem, ClassElement classElem) { |
| var isLocalClassDecl = classElem.library == libElem; |
| var suggestions = <CompletionSuggestion>[]; |
| for (var constructor in classElem.constructors) { |
| if (isLocalClassDecl || !constructor.isPrivate) { |
| var name = constructor.name; |
| if (name != null) { |
| var relevance = request.useNewRelevance |
| ? Relevance.namedConstructor |
| : (constructor.hasDeprecated |
| ? DART_RELEVANCE_LOW |
| : DART_RELEVANCE_DEFAULT); |
| var suggestion = createSuggestion(request, constructor, |
| completion: name, relevance: relevance); |
| if (suggestion != null) { |
| suggestions.add(suggestion); |
| } |
| } |
| } |
| } |
| return suggestions; |
| } |
| } |