convert ImportedReferenceContributor to new API

pkg/analysis_server/lib/src/services/completion/imported_reference_contributor.dart

Index: pkg/analysis_server/lib/src/services/completion/imported_reference_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/imported_reference_contributor.dart b/pkg/analysis_server/lib/src/services/completion/imported_reference_contributor.dart
deleted file mode 100644
index b13c33049746d4d5e2ddc176eac5c4f74deca040..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/services/completion/imported_reference_contributor.dart
+++ /dev/null
@@ -1,245 +0,0 @@
-// 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 services.completion.contributor.dart.toplevel;
-
-import 'dart:async';
-
-import 'package:analysis_server/src/protocol_server.dart'
-    hide Element, ElementKind;
-import 'package:analysis_server/src/services/completion/dart_completion_cache.dart';
-import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
-import 'package:analysis_server/src/services/completion/optype.dart';
-import 'package:analysis_server/src/services/completion/suggestion_builder.dart';
-import 'package:analyzer/src/generated/ast.dart';
-
-/**
- * A contributor for calculating imported class and top level variable
- * `completion.getSuggestions` request results.
- */
-class ImportedReferenceContributor extends DartCompletionContributor {
-  bool shouldWaitForLowPrioritySuggestions;
-  bool suggestionsComputed;
-  _ImportedSuggestionBuilder builder;
-
-  ImportedReferenceContributor(
-      {this.shouldWaitForLowPrioritySuggestions: false});
-
-  @override
-  bool computeFast(DartCompletionRequest request) {
-    // Don't suggest in comments.
-    if (request.target.isCommentText) {
-      return true;
-    }
-
-    OpType optype = request.optype;
-    if (!optype.isPrefixed) {
-      if (optype.includeReturnValueSuggestions ||
-          optype.includeTypeNameSuggestions ||
-          optype.includeVoidReturnSuggestions ||
-          optype.includeConstructorSuggestions) {
-        builder = new _ImportedSuggestionBuilder(request, optype);
-        builder.shouldWaitForLowPrioritySuggestions =
-            shouldWaitForLowPrioritySuggestions;
-        // If target is an argument in an argument list
-        // then suggestions may need to be adjusted
-        suggestionsComputed =
-            builder.computeFast(request.target.containingNode);
-        return suggestionsComputed && request.target.argIndex == null;
-      }
-    }
-    return true;
-  }
-
-  @override
-  Future<bool> computeFull(DartCompletionRequest request) async {
-    if (builder != null) {
-      if (!suggestionsComputed) {
-        bool result = await builder.computeFull(request.target.containingNode);
-        _updateSuggestions(request);
-        return result;
-      }
-      _updateSuggestions(request);
-      return true;
-    }
-    return false;
-  }
-
-  /**
-   * If target is a function argument, suggest identifiers not invocations
-   */
-  void _updateSuggestions(DartCompletionRequest request) {
-    if (request.target.isFunctionalArgument()) {
-      request.convertInvocationsToIdentifiers();
-    }
-  }
-}
-
-/**
- * [_ImportedSuggestionBuilder] traverses the imports and builds suggestions
- * based upon imported elements.
- */
-class _ImportedSuggestionBuilder extends ElementSuggestionBuilder
-    implements SuggestionBuilder {
-  bool shouldWaitForLowPrioritySuggestions;
-  final DartCompletionRequest request;
-  final OpType optype;
-  DartCompletionCache cache;
-
-  _ImportedSuggestionBuilder(this.request, this.optype) {
-    cache = request.cache;
-  }
-
-  @override
-  CompletionSuggestionKind get kind => CompletionSuggestionKind.INVOCATION;
-
-  /**
-   * If the needed information is cached, then add suggestions and return `true`
-   * else return `false` indicating that additional work is necessary.
-   */
-  bool computeFast(AstNode node) {
-    CompilationUnit unit = request.unit;
-    if (cache.isImportInfoCached(unit)) {
-      _addSuggestions(node);
-      return true;
-    }
-    return false;
-  }
-
-  /**
-   * Compute suggested based upon imported elements.
-   */
-  Future<bool> computeFull(AstNode node) {
-    Future<bool> addSuggestions(_) {
-      _addSuggestions(node);
-      return new Future.value(true);
-    }
-
-    Future future = null;
-    if (!cache.isImportInfoCached(request.unit)) {
-      future = cache.computeImportInfo(request.unit, request.searchEngine,
-          shouldWaitForLowPrioritySuggestions);
-    }
-    if (future != null) {
-      return future.then(addSuggestions);
-    }
-    return addSuggestions(true);
-  }
-
-  /**
-   * Add constructor and library prefix suggestions from the cache.
-   * To reduce the number of suggestions sent to the client,
-   * filter the suggestions based upon the first character typed.
-   * If no characters are available to use for filtering,
-   * then exclude all low priority suggestions.
-   */
-  void _addConstructorSuggestions() {
-    String filterText = request.filterText;
-    if (filterText.length > 1) {
-      filterText = filterText.substring(0, 1);
-    }
-    DartCompletionCache cache = request.cache;
-    _addFilteredSuggestions(filterText, cache.importedConstructorSuggestions);
-  }
-
-  /**
-   * Add suggestions which start with the given text.
-   */
-  _addFilteredSuggestions(
-      String filterText, List<CompletionSuggestion> unfiltered) {
-    //TODO (danrubel) Revisit this filtering once paged API has been added
-    unfiltered.forEach((CompletionSuggestion suggestion) {
-      if (filterText.length > 0) {
-        if (suggestion.completion.startsWith(filterText)) {
-          request.addSuggestion(suggestion);
-        }
-      } else {
-        if (suggestion.relevance != DART_RELEVANCE_LOW) {
-          request.addSuggestion(suggestion);
-        }
-      }
-    });
-  }
-
-  /**
-   * Add suggestions for any inherited imported members.
-   */
-  void _addInheritedSuggestions(AstNode node) {
-    //
-    // Replaced by InheritedReferenceContributor
-    //
-    // var classDecl = node.getAncestor((p) => p is ClassDeclaration);
-    // if (classDecl is ClassDeclaration && !optype.inStaticMethodBody) {
-    //   // Build a list of inherited types that are imported
-    //   // and include any inherited imported members
-    //   List<String> inheritedTypes = new List<String>();
-    //   // local declarations are handled by the local reference contributor
-    //   visitInheritedTypes(classDecl, importedTypeName: (String typeName) {
-    //     inheritedTypes.add(typeName);
-    //   });
-    //   HashSet<String> visited = new HashSet<String>();
-    //   while (inheritedTypes.length > 0) {
-    //     String name = inheritedTypes.removeLast();
-    //     ClassElement elem = cache.importedClassMap[name];
-    //     if (visited.add(name) && elem != null) {
-    //       _addElementSuggestions(elem.fields,
-    //           relevance: DART_RELEVANCE_INHERITED_FIELD);
-    //       _addElementSuggestions(elem.accessors,
-    //           relevance: DART_RELEVANCE_INHERITED_ACCESSOR);
-    //       _addElementSuggestions(elem.methods,
-    //           relevance: DART_RELEVANCE_INHERITED_METHOD);
-    //       elem.allSupertypes.forEach((InterfaceType type) {
-    //         if (visited.add(type.name) && type.element != null) {
-    //           _addElementSuggestions(type.element.fields,
-    //               relevance: DART_RELEVANCE_INHERITED_FIELD);
-    //           _addElementSuggestions(type.element.accessors,
-    //               relevance: DART_RELEVANCE_INHERITED_ACCESSOR);
-    //           _addElementSuggestions(type.element.methods,
-    //               relevance: DART_RELEVANCE_INHERITED_METHOD);
-    //         }
-    //       });
-    //     }
-    //   }
-    // }
-  }
-
-  /**
-   * Add suggested based upon imported elements.
-   */
-  void _addSuggestions(AstNode node) {
-    if (optype.includeConstructorSuggestions) {
-      _addConstructorSuggestions();
-    }
-    if (optype.includeReturnValueSuggestions ||
-        optype.includeTypeNameSuggestions ||
-        optype.includeVoidReturnSuggestions) {
-      _addInheritedSuggestions(node);
-      _addTopLevelSuggestions();
-    }
-  }
-
-  /**
-   * Add top level suggestions from the cache.
-   * To reduce the number of suggestions sent to the client,
-   * filter the suggestions based upon the first character typed.
-   * If no characters are available to use for filtering,
-   * then exclude all low priority suggestions.
-   */
-  void _addTopLevelSuggestions() {
-    String filterText = request.filterText;
-    if (filterText.length > 1) {
-      filterText = filterText.substring(0, 1);
-    }
-    DartCompletionCache cache = request.cache;
-    if (optype.includeTypeNameSuggestions) {
-      _addFilteredSuggestions(filterText, cache.importedTypeSuggestions);
-    }
-    if (optype.includeReturnValueSuggestions) {
-      _addFilteredSuggestions(filterText, cache.otherImportedSuggestions);
-    }
-    if (optype.includeVoidReturnSuggestions) {
-      _addFilteredSuggestions(filterText, cache.importedVoidReturnSuggestions);
-    }
-  }
-}