'Rename Constructor' refactoring.

pkg/analysis_services/lib/src/refactoring/rename_constructor.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.src.refactoring.rename_constructor;
+
+import 'dart:async';
+
+import 'package:analysis_services/correction/change.dart';
+import 'package:analysis_services/correction/status.dart';
+import 'package:analysis_services/refactoring/refactoring.dart';
+import 'package:analysis_services/search/hierarchy.dart';
+import 'package:analysis_services/search/search_engine.dart';
+import 'package:analysis_services/src/correction/strings.dart';
+import 'package:analysis_services/src/correction/util.dart';
+import 'package:analysis_services/src/refactoring/naming_conventions.dart';
+import 'package:analysis_services/src/refactoring/rename.dart';
+import 'package:analyzer/src/generated/element.dart';
+
+
+/**
+ * A [Refactoring] for renaming [ConstructorElement]s.
+ */
+class RenameConstructorRefactoringImpl extends RenameRefactoringImpl {
+  RenameConstructorRefactoringImpl(SearchEngine searchEngine,
+      ConstructorElement element)
+      : super(searchEngine, element);
+
+  @override
+  ConstructorElement get element => super.element as ConstructorElement;
+
+  @override
+  String get refactoringName {
+    return "Rename Constructor";
+  }
+
+  @override
+  Future<RefactoringStatus> checkFinalConditions() {
+    RefactoringStatus result = new RefactoringStatus();
+    _analyzePossibleConflicts(result);
+    return new Future.value(result);
+  }
+
+  @override
+  RefactoringStatus checkNewName() {
+    RefactoringStatus result = super.checkNewName();
+    result.addStatus(validateConstructorName(newName));
+    return result;
+  }
+
+  @override
+  Future<Change> createChange() {
+    Change change = new Change(refactoringName);
+    String replacement = newName.isEmpty ? '' : '.${newName}';
+    // update references
+    return searchEngine.searchReferences(element).then((refMatches) {
+      List<SourceReference> references = getSourceReferences(refMatches);
+      if (!element.isSynthetic) {
+        for (SourceReference reference in references) {
+          Edit edit = createReferenceEdit(reference, replacement);
+          change.addEdit(reference.file, edit);
+        }
+      }
+      return change;
+    });
+  }
+
+  void _analyzePossibleConflicts(RefactoringStatus result) {
+    // check if there are members with "newName" in the same ClassElement
+    ClassElement parentClass = element.enclosingElement;
+    for (Element newNameMember in getChildren(parentClass, newName)) {
+      String message =
+          format(
+              "Class '{0}' already declares {1} with name '{2}'.",
+              parentClass.displayName,
+              getElementKindName(newNameMember),
+              newName);
+      result.addError(
+          message,
+          new RefactoringStatusContext.forElement(newNameMember));
+    }
+  }
+}