Implement searchMemberDeclarations() / searchTopLevelDeclarations().

pkg/analysis_server/lib/src/services/index2/index2.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/summary/format.dart';
@@ skipping 330 matching lines @@
     String unitLibraryUri = null;
     String unitUnitUri = null;
     for (int i = 0; i < unitIndex.definedNames.length; i++) {
       if (unitIndex.definedNameKinds[i] == kind) {
         int nameIndex = unitIndex.definedNames[i];
         String name = packageRequester.index.strings[nameIndex];
         if (regExp.matchAsPrefix(name) != null) {
           unitLibraryUri ??= packageRequester.getUnitLibraryUri(unitIndex.unit);
           unitUnitUri ??= packageRequester.getUnitUnitUri(unitIndex.unit);
           locations.add(new Location(unitLibraryUri, unitUnitUri,
-              unitIndex.definedNameOffsets[i], 0, false));
+              unitIndex.definedNameOffsets[i], name.length, false));
         }
       }
     }
     return locations;
   }
 
   /**
    * Return a list of locations where an element with the given [elementId] has
    * relation of the given [kind].
    */
@@ skipping 18 matching lines @@
             unitLibraryUri,
             unitUnitUri,
             unitIndex.usedElementOffsets[i],
             unitIndex.usedElementLengths[i],
             unitIndex.usedElementIsQualifiedFlags[i]));
       }
     }
     return locations;
   }
 }