Add a completion for inherited methods

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

Index: pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart b/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
index 06c3c6a8af077fd715de028337e0620d8896eb4f..67f713b9cdb48d1c68239c289b45b9898d387e3f 100644
--- a/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
+++ b/pkg/analysis_server/lib/src/services/completion/dart_completion_manager.dart
@@ -8,6 +8,7 @@ import 'dart:async';
 
 import 'package:analysis_server/completion/completion_core.dart'
     show CompletionRequest;
+import 'package:analysis_server/completion/completion_dart.dart' as newApi;
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/services/completion/arglist_contributor.dart';
@@ -16,13 +17,15 @@ import 'package:analysis_server/src/services/completion/common_usage_computer.da
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
 import 'package:analysis_server/src/services/completion/completion_target.dart';
 import 'package:analysis_server/src/services/completion/dart_completion_cache.dart';
-import 'package:analysis_server/src/services/completion/uri_contributor.dart';
 import 'package:analysis_server/src/services/completion/imported_reference_contributor.dart';
+import 'package:analysis_server/src/services/completion/inherited_computer.dart';
 import 'package:analysis_server/src/services/completion/keyword_contributor.dart';
 import 'package:analysis_server/src/services/completion/local_reference_contributor.dart';
 import 'package:analysis_server/src/services/completion/optype.dart';
 import 'package:analysis_server/src/services/completion/prefixed_element_contributor.dart';
+import 'package:analysis_server/src/services/completion/uri_contributor.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
+import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ -93,6 +96,9 @@ class DartCompletionManager extends CompletionManager {
         new CombinatorContributor(),
         new PrefixedElementContributor(),
         new UriContributor(),
+        // TODO(brianwilkerson) Use the completion contributor extension point
+        // to add the contributor below (and eventually, all the contributors).
+        new NewCompletionWrapper(new InheritedContributor())

[danrubel, 2015/09/18 00:30:54]

Please comment this line out for now and commit the changes. We'll review and
fix in a subsequent CL.

[Brian Wilkerson, 2015/09/18 15:59:26]

Done

       ];
     }
     if (commonUsageComputer == null) {
@@ -399,3 +405,78 @@ class DartCompletionRequest extends CompletionRequestImpl {
     }
   }
 }
+
+/**
+ * A wrapper around a new dart completion contributor that makes it usable where
+ * an old dart completion contributor is expected.
+ */
+class NewCompletionWrapper implements DartCompletionContributor {
+  /**
+   * The new-style contributor that is being wrapped.
+   */
+  final newApi.DartCompletionContributor contributor;
+
+  /**
+   * Initialize a newly created wrapper for the given [contributor].
+   */
+  NewCompletionWrapper(this.contributor);
+
+  @override
+  bool computeFast(DartCompletionRequest request) {
+    List<CompletionSuggestion> suggestions =
+        contributor.computeSuggestions(new OldRequestWrapper(request));
+    if (suggestions == null) {
+      return false;
+    }
+    for (CompletionSuggestion suggestion in suggestions) {
+      request.addSuggestion(suggestion);
+    }
+    return true;
+  }
+
+  @override
+  Future<bool> computeFull(DartCompletionRequest request) async {
+    List<CompletionSuggestion> suggestions =
+        contributor.computeSuggestions(new OldRequestWrapper(request));
+    if (suggestions != null) {
+      for (CompletionSuggestion suggestion in suggestions) {
+        request.addSuggestion(suggestion);
+      }

[danrubel, 2015/09/18 00:30:54]

return true after this for loop

[Brian Wilkerson, 2015/09/18 15:59:26]

Done

+    }
+    return true;

[danrubel, 2015/09/18 00:30:54]

return false here

[Brian Wilkerson, 2015/09/18 15:59:26]

Done

+  }
+
+  @override
+  String toString() => 'wrapped $contributor';
+}
+
+/**
+ * A wrapper around an old dart completion request that makes it usable where a
+ * new dart completion request is expected.
+ */
+class OldRequestWrapper implements newApi.DartCompletionRequest {
+  final DartCompletionRequest request;
+
+  OldRequestWrapper(this.request);
+
+  @override
+  AnalysisContext get context => request.context;
+
+  @override
+  bool get isResolved => request.unit.element != null;
+
+  @override
+  int get offset => request.offset;
+
+  @override
+  ResourceProvider get resourceProvider => request.resourceProvider;
+
+  @override
+  Source get source => request.source;
+
+  @override
+  CompilationUnit get unit => request.unit;
+
+  @override
+  String toString() => 'wrapped $request';
+}