Navigation computer and two variants of tests for it.

pkg/analysis_server/lib/src/operation/operation_analysis.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 operation.analysis;
 
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computers.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 54 matching lines @@
     for (int i = 0; i < notices.length; i++) {
       ChangeNotice notice = notices[i];
       Source source = notice.source;
       CompilationUnit dartUnit = notice.compilationUnit;
       // TODO(scheglov) use default subscriptions
       String file = source.fullName;
       if (dartUnit != null) {
         if (server.hasAnalysisSubscription(AnalysisService.HIGHLIGHTS, file)) {
           sendAnalysisNotificationHighlights(server, file, dartUnit);
         }
+        if (server.hasAnalysisSubscription(AnalysisService.NAVIGATION, file)) {
+          sendAnalysisNotificationNavigation(server, file, dartUnit);
+        }
       }
       if (!source.isInSystemLibrary) {
         sendAnalysisNotificationErrors(server, file, notice.errors);
       }
     }
   }
 }
 
 void sendAnalysisNotificationErrors(AnalysisServer server,
                                     String file, List<AnalysisError> errors) {
   Notification notification = new Notification(NOTIFICATION_ERRORS);
   notification.setParameter(FILE, file);
   notification.setParameter(ERRORS, errors.map(errorToJson).toList());
   server.sendNotification(notification);
 }
 
 void sendAnalysisNotificationHighlights(AnalysisServer server,
                                         String file, CompilationUnit dartUnit) {
   Notification notification = new Notification(NOTIFICATION_HIGHLIGHTS);
   notification.setParameter(FILE, file);
   notification.setParameter(
       REGIONS,
       new DartUnitHighlightsComputer(dartUnit).compute());
   server.sendNotification(notification);
 }
 
+void sendAnalysisNotificationNavigation(AnalysisServer server,
+                                        String file, CompilationUnit dartUnit) {
+  Notification notification = new Notification(NOTIFICATION_NAVIGATION);
+  notification.setParameter(FILE, file);
+  notification.setParameter(
+      REGIONS,
+      new DartUnitNavigationComputer(dartUnit).compute());
+  server.sendNotification(notification);
+}
+
 Map<String, Object> errorToJson(AnalysisError analysisError) {
   // TODO(paulberry): move this function into the AnalysisError class.
   ErrorCode errorCode = analysisError.errorCode;
   Map<String, Object> result = {
     'file': analysisError.source.fullName,
     // TODO(scheglov) add Enum.fullName ?
     'errorCode': '${errorCode.runtimeType}.${(errorCode as Enum).name}',
     'offset': analysisError.offset,
     'length': analysisError.length,
     'message': analysisError.message
   };
   if (analysisError.correction != null) {
     result['correction'] = analysisError.correction;
   }
   return result;
 }