Import analysis_services.dart into analysis_server.dart.

pkg/analysis_services/lib/src/refactoring/rename.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;
-
-import 'dart:async';
-import 'dart:collection';
-
-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/search_engine.dart';
-import 'package:analysis_services/src/correction/source_range.dart';
-import 'package:analysis_services/src/refactoring/refactoring.dart';
-import 'package:analyzer/src/generated/element.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/source.dart';
-
-
-/**
- * Returns the [Edit] to replace the given [SearchMatch] reference.
- */
-Edit createReferenceEdit(SourceReference reference, String newText) {
-  return new Edit.range(reference.range, newText);
-}
-
-
-/**
- * Returns the file containing declaration of the given [Element].
- */
-String getElementFile(Element element) {
-  return element.source.fullName;
-}
-
-
-/**
- * When a [Source] (a file) is used in more than one context, [SearchEngine]
- * will return separate [SearchMatch]s for each context. But in rename
- * refactorings we want to update each [Source] only once.
- */
-List<SourceReference> getSourceReferences(List<SearchMatch> matches) {
-  var uniqueReferences = new HashMap<SourceReference, SourceReference>();
-  for (SearchMatch match in matches) {
-    Element element = match.element;
-    String file = getElementFile(element);
-    SourceRange range = match.sourceRange;
-    SourceReference newReference =
-        new SourceReference(file, range, element, match.isResolved, match.isQualified);
-    SourceReference oldReference = uniqueReferences[newReference];
-    if (oldReference == null) {
-      uniqueReferences[newReference] = newReference;
-      oldReference = newReference;
-    }
-  }
-  return uniqueReferences.keys.toList();
-}
-
-
-/**
- * Returns `true` if two given [Element]s are [LocalElement]s and have
- * intersecting with visibility ranges.
- */
-bool haveIntersectingRanges(LocalElement localElement, Element element) {
-  if (element is! LocalElement) {
-    return false;
-  }
-  LocalElement localElement2 = element as LocalElement;
-  Source localSource = localElement.source;
-  Source localSource2 = localElement2.source;
-  SourceRange localRange = localElement.visibleRange;
-  SourceRange localRange2 = localElement2.visibleRange;
-  return localSource2 == localSource &&
-      localRange != null &&
-      localRange2 != null &&
-      localRange2.intersects(localRange);
-}
-
-
-/**
- * Checks if [element] is defined in the library containing [source].
- */
-bool isDefinedInLibrary(Element element, AnalysisContext context, Source source)
-    {
-  // should be the same AnalysisContext
-  if (!isInContext(element, context)) {
-    return false;
-  }
-  // private elements are visible only in their library
-  List<Source> librarySourcesOfSource = context.getLibrariesContaining(source);
-  Source librarySourceOfElement = element.library.source;
-  return librarySourcesOfSource.contains(librarySourceOfElement);
-}
-
-
-/**
- * Checks if the given [Element] is in the given [AnalysisContext].
- */
-bool isInContext(Element element, AnalysisContext context) {
-  AnalysisContext elementContext = element.context;
-  if (elementContext == context) {
-    return true;
-  }
-  if (context is InstrumentedAnalysisContextImpl) {
-    return elementContext == context.basis;
-  }
-  return false;
-}
-
-
-/**
- * Checks if the given unqualified [SearchMatch] intersects with visibility
- * range of [localElement].
- */
-bool isReferenceInLocalRange(LocalElement localElement, SearchMatch reference) {
-  if (reference.isQualified) {
-    return false;
-  }
-  Source localSource = localElement.source;
-  Source referenceSource = reference.element.source;
-  SourceRange localRange = localElement.visibleRange;
-  SourceRange referenceRange = reference.sourceRange;
-  return referenceSource == localSource &&
-      referenceRange.intersects(localRange);
-}
-
-
-/**
- * Checks if [element] is visible in the library containing [source].
- */
-bool isVisibleInLibrary(Element element, AnalysisContext context, Source source)
-    {
-  // should be the same AnalysisContext
-  if (!isInContext(element, context)) {
-    return false;
-  }
-  // public elements are always visible
-  if (element.isPublic) {
-    return true;
-  }
-  // private elements are visible only in their library
-  return isDefinedInLibrary(element, context, source);
-}
-
-
-
-/**
- * An abstract implementation of [RenameRefactoring].
- */
-abstract class RenameRefactoringImpl extends RefactoringImpl implements
-    RenameRefactoring {
-  final SearchEngine searchEngine;
-  final Element element;
-  final AnalysisContext context;
-  final String oldName;
-
-  String newName;
-
-  RenameRefactoringImpl(SearchEngine searchEngine, Element element)
-      : searchEngine = searchEngine,
-        element = element,
-        context = element.context,
-        oldName = _getDisplayName(element);
-
-  /**
-   * Adds the "Update declaration" [Edit] to [change].
-   */
-  void addDeclarationEdit(Change change, Element element) {
-    if (element != null) {
-      String file = getElementFile(element);
-      Edit edit = new Edit.range(rangeElementName(element), newName);
-      change.addEdit(file, edit);
-    }
-  }
-
-  /**
-   * Adds an "Update reference" [Edit] to [change].
-   */
-  void addReferenceEdit(Change change, SourceReference reference) {
-    Edit edit = createReferenceEdit(reference, newName);
-    change.addEdit(reference.file, edit);
-  }
-
-  @override
-  Future<RefactoringStatus> checkInitialConditions() {
-    var result = new RefactoringStatus();
-    return new Future.value(result);
-  }
-
-  @override
-  RefactoringStatus checkNewName() {
-    RefactoringStatus result = new RefactoringStatus();
-    if (newName == oldName) {
-      result.addFatalError(
-          "The new name must be different than the current name.");
-    }
-    return result;
-  }
-
-  @override
-  bool requiresPreview() {
-    return false;
-  }
-
-  static String _getDisplayName(Element element) {
-    if (element is ImportElement) {
-      PrefixElement prefix = element.prefix;
-      if (prefix != null) {
-        return prefix.displayName;
-      }
-    }
-    return element.displayName;
-  }
-}
-
-
-/**
- * The [SourceRange] in some [Source].
- */
-class SourceReference {
-  final String file;
-  final SourceRange range;
-  final Element element;
-  final bool isResolved;
-  final bool isQualified;
-
-  SourceReference(this.file, this.range, this.element, this.isResolved,
-      this.isQualified);
-
-  @override
-  int get hashCode {
-    int hash = file.hashCode;
-    hash = ((hash << 16) & 0xFFFFFFFF) + range.hashCode;
-    return hash;
-  }
-
-  @override
-  bool operator ==(Object other) {
-    if (identical(other, this)) {
-      return true;
-    }
-    if (other is SourceReference) {
-      return other.file == file && other.range == range;
-    }
-    return false;
-  }
-
-  @override
-  String toString() => '${file}@${range}';
-}