Convert quick fix support to use AnalysisDriver

pkg/analysis_server/lib/plugin/edit/fix/fix_dart.dart

 // Copyright (c) 2015, 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:analysis_server/plugin/edit/fix/fix_core.dart';
 import 'package:analysis_server/src/services/correction/fix_internal.dart'
     show DartFixContextImpl;
-import 'package:analysis_server/src/services/correction/namespace.dart'
-    show getExportedElement;
 import 'package:analyzer/dart/ast/ast.dart';
-import 'package:analyzer/dart/element/element.dart';
-import 'package:analyzer/src/dart/analysis/ast_provider_context.dart';
+import 'package:analyzer/src/dart/analysis/ast_provider_driver.dart';
+import 'package:analyzer/src/dart/analysis/driver.dart';
 import 'package:analyzer/src/dart/analysis/top_level_declaration.dart';
 import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/task/dart.dart' show LIBRARY_ELEMENT4;
 
 /**
  * Complete with top-level declarations with the given [name].
  */
 typedef Future<List<TopLevelDeclarationInSource>> GetTopLevelDeclarations(
     String name);
 
 /**
  * An object used to provide context information for [DartFixContributor]s.
  *
@@ skipping 18 matching lines @@
 
 /**
  * A [FixContributor] that can be used to contribute fixes for errors in Dart
  * files.
  *
  * Clients may extend this class when implementing plugins.
  */
 abstract class DartFixContributor implements FixContributor {
   @override
   Future<List<Fix>> computeFixes(FixContext context) async {
-    AnalysisContext analysisContext = context.analysisContext;
+    AnalysisDriver driver = context.analysisDriver;
     Source source = context.error.source;
     if (!AnalysisEngine.isDartFileName(source.fullName)) {
       return Fix.EMPTY_LIST;
     }
-    List<Source> libraries = analysisContext.getLibrariesContaining(source);
-    if (libraries.isEmpty) {
-      return Fix.EMPTY_LIST;
-    }
-    CompilationUnit unit =
-        analysisContext.getResolvedCompilationUnit2(source, libraries[0]);
+    CompilationUnit unit = (await driver.getResult(source.fullName)).unit;
     if (unit == null) {
       return Fix.EMPTY_LIST;
     }
-    DartFixContext dartContext = new DartFixContextImpl(
-        context,
-        _getTopLevelDeclarations(analysisContext),
-        new AstProviderForContext(analysisContext),
-        unit);
+    DartFixContext dartContext =
+        new DartFixContextImpl(context, new AstProviderForDriver(driver), unit);
     return internalComputeFixes(dartContext);
   }
 
   /**
    * Return a list of fixes for the given [context].
    */
   Future<List<Fix>> internalComputeFixes(DartFixContext context);
-
-  GetTopLevelDeclarations _getTopLevelDeclarations(AnalysisContext context) {
-    return (String name) async {
-      List<TopLevelDeclarationInSource> declarations = [];
-      List<Source> librarySources = context.librarySources;
-      for (Source librarySource in librarySources) {
-        // Prepare the LibraryElement.
-        LibraryElement libraryElement =
-            context.getResult(librarySource, LIBRARY_ELEMENT4);
-        if (libraryElement == null) {
-          continue;
-        }
-        // Prepare the exported Element.
-        Element element = getExportedElement(libraryElement, name);
-        if (element == null) {
-          continue;
-        }
-        if (element is PropertyAccessorElement) {
-          element = (element as PropertyAccessorElement).variable;
-        }
-        // Add a new declaration.
-        TopLevelDeclarationKind topLevelKind;
-        if (element.kind == ElementKind.CLASS ||
-            element.kind == ElementKind.FUNCTION_TYPE_ALIAS) {
-          topLevelKind = TopLevelDeclarationKind.type;
-        } else if (element.kind == ElementKind.FUNCTION) {
-          topLevelKind = TopLevelDeclarationKind.function;
-        } else if (element.kind == ElementKind.TOP_LEVEL_VARIABLE) {
-          topLevelKind = TopLevelDeclarationKind.variable;
-        }
-        if (topLevelKind != null) {
-          bool isExported = element.librarySource != librarySource;
-          declarations.add(new TopLevelDeclarationInSource(librarySource,
-              new TopLevelDeclaration(topLevelKind, element.name), isExported));
-        }
-      }
-      return declarations;
-    };
-  }
 }