only suggest types when completing from a library prefix in parameter list

pkg/analysis_server/lib/src/services/completion/suggestion_builder.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 services.completion.suggestion.builder;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
@@ skipping 376 matching lines @@
 
 /**
  * This class visits elements in a library and provides suggestions based upon
  * the visible members in that library. Clients should call
  * [LibraryElementSuggestionBuilder.suggestionsFor].
  */
 class LibraryElementSuggestionBuilder extends GeneralizingElementVisitor
     with ElementSuggestionBuilder {
   final DartCompletionRequest request;
   final CompletionSuggestionKind kind;
+  final bool typesOnly;
 
-  LibraryElementSuggestionBuilder(this.request, this.kind);
+  LibraryElementSuggestionBuilder(this.request, this.kind, this.typesOnly);
 
   @override
   visitClassElement(ClassElement element) {
     addSuggestion(element);
   }
 
   @override
   visitCompilationUnitElement(CompilationUnitElement element) {
     element.visitChildren(this);
   }
 
   @override
   visitElement(Element element) {
     // ignored
   }
 
   @override
   visitFunctionElement(FunctionElement element) {
-    addSuggestion(element);
+    if (!typesOnly) {
+      addSuggestion(element);
+    }
   }
 
   @override
   visitFunctionTypeAliasElement(FunctionTypeAliasElement element) {
     addSuggestion(element);
   }
 
   @override
   visitTopLevelVariableElement(TopLevelVariableElement element) {
-    addSuggestion(element);
+    if (!typesOnly) {
+      addSuggestion(element);
+    }
   }
 
   /**
    * Add suggestions for the visible members in the given library
    */
   static void suggestionsFor(DartCompletionRequest request,
-      CompletionSuggestionKind kind, LibraryElement library) {
+      CompletionSuggestionKind kind, LibraryElement library, bool typesOnly) {
     if (library != null) {
-      library.visitChildren(new LibraryElementSuggestionBuilder(request, kind));
+      library.visitChildren(new LibraryElementSuggestionBuilder(request, kind, typesOnly));
     }
   }
 }
 
 /**
  * This class visits elements in a class and provides suggestions based upon
  * the visible named constructors in that class.
  */
 class NamedConstructorSuggestionBuilder extends GeneralizingElementVisitor
     with ElementSuggestionBuilder implements SuggestionBuilder {
@@ skipping 121 matching lines @@
    * or `false` if [computeFull] should be called.
    */
   bool computeFast(AstNode node);
 
   /**
    * Return a future that computes the suggestions given a fully resolved AST.
    * The future returns `true` if suggestions were added, else `false`.
    */
   Future<bool> computeFull(AstNode node);
 }