suggest deferred/as keywords

pkg/analysis_server/lib/src/services/completion/keyword_contributor.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.contributor.dart.keyword;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
@@ skipping 88 matching lines @@
     }
     if (previousMember is ClassDeclaration) {
       if (previousMember.leftBracket == null ||
           previousMember.leftBracket.isSynthetic) {
         // If the prior member is an unfinished class declaration
         // then the user is probably finishing that
         _addClassDeclarationKeywords(previousMember);
         return;
       }
     }
+    if (previousMember is ImportDirective) {
+      if (previousMember.semicolon == null || previousMember.semicolon.isSynthetic) {
+        // If the prior member is an unfinished import directive
+        // then the user is probably finishing that
+        _addImportDirectiveKeywords(previousMember);
+        return;
+      }
+    }
     if (previousMember == null || previousMember is Directive) {
       if (previousMember == null &&
           !node.directives.any((d) => d is LibraryDirective)) {
         _addSuggestions([Keyword.LIBRARY], DART_RELEVANCE_HIGH);
       }
       _addSuggestions(
           [Keyword.EXPORT, Keyword.IMPORT, Keyword.PART], DART_RELEVANCE_HIGH);
     }
     if (entity == null || entity is Declaration) {
       _addSuggestions([
         Keyword.ABSTRACT,
         Keyword.CLASS,
         Keyword.CONST,
         Keyword.DYNAMIC,
         Keyword.FINAL,
         Keyword.TYPEDEF,
         Keyword.VAR,
         Keyword.VOID
       ], DART_RELEVANCE_HIGH);
     }
   }
 
+  @override
+  visitImportDirective(ImportDirective node) {
+    if (entity == node.asKeyword) {
+      if (node.deferredKeyword == null) {
+        _addSuggestion(Keyword.DEFERRED, DART_RELEVANCE_HIGH);
+      }
+    }
+    if (entity == node.semicolon) {
+      _addImportDirectiveKeywords(node);
+    }
+  }
+
+  void _addImportDirectiveKeywords(ImportDirective node) {
+    if (node.asKeyword == null) {
+      _addSuggestion(Keyword.AS, DART_RELEVANCE_HIGH);
+      if (node.deferredKeyword == null) {
+        _addSuggestion(Keyword.DEFERRED, DART_RELEVANCE_HIGH);
+      }
+    }
+  }
+
   void _addClassDeclarationKeywords(ClassDeclaration node) {
     // Very simplistic suggestion because analyzer will warn if
     // the extends / with / implements keywords are out of order
     if (node.extendsClause == null) {
       _addSuggestion(Keyword.EXTENDS, DART_RELEVANCE_HIGH);
     } else if (node.withClause == null) {
       _addSuggestion(Keyword.WITH, DART_RELEVANCE_HIGH);
     }
     if (node.implementsClause == null) {
       _addSuggestion(Keyword.IMPLEMENTS, DART_RELEVANCE_HIGH);
@@ skipping 22 matching lines @@
         return false;
       }
       AstNode parent = body.parent;
       if (parent is ConstructorDeclaration || parent is MethodDeclaration) {
         return true;
       }
       node = parent;
     }
   }
 }