Reset refactoring manager on any analysis.

pkg/analysis_server/lib/src/edit/edit_domain.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 edit.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
@@ skipping 162 matching lines @@
   Refactoring refactoring;
   HasToJson feedback;
   RefactoringStatus initStatus;
   RefactoringStatus optionsStatus;
   RefactoringStatus finalStatus;
 
   String requestId;
   EditGetRefactoringResult result;
 
   _RefactoringManager(this.server, this.searchEngine) {
+    server.addAnalysisServerListener(
+        new _ResetRefactoringManagerAnalysisServerListener(this));
     _reset();
   }
 
   bool get _hasFatalError {
     return initStatus.hasFatalError ||
         optionsStatus.hasFatalError ||
         finalStatus.hasFatalError;
   }
 
   /**
@@ skipping 162 matching lines @@
         RenameRefactoring refactoring = this.refactoring;
         RenameFeedback feedback = this.feedback;
         feedback.elementKindName = refactoring.elementKindName;
         feedback.oldName = refactoring.oldName;
       }
       return initStatus;
     });
   }
 
   void _reset() {
+    kind = null;
+    offset = null;
+    length = null;
     refactoring = null;
     feedback = null;
     initStatus = new RefactoringStatus();
     optionsStatus = new RefactoringStatus();
     finalStatus = new RefactoringStatus();
   }
 
   void _sendResultResponse() {
     if (feedback != null) {
       result.feedback = feedback;
@@ skipping 44 matching lines @@
     }
     if (refactoring is RenameRefactoring) {
       RenameRefactoring renameRefactoring = refactoring;
       RenameOptions renameOptions = params.options;
       renameRefactoring.newName = renameOptions.newName;
       return renameRefactoring.checkNewName();
     }
     return new RefactoringStatus();
   }
 }
+
+
+/**
+ * A [AnalysisServerListener] that resets [_RefactoringManager] when analysis
+ * is started in the [AnalysisServer].
+ */
+class _ResetRefactoringManagerAnalysisServerListener implements
+    AnalysisServerListener {
+  final _RefactoringManager refactoringManager;
+
+  _ResetRefactoringManagerAnalysisServerListener(this.refactoringManager);
+
+  @override
+  void analysisComplete() {
+  }
+
+  @override
+  void analysisStarted(engine.AnalysisContext context) {
+    refactoringManager._reset();
+  }
+}