Issue 24988. Parse source for sorting.

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/plugin/edit/assist/assist_core.dart';
 import 'package:analysis_server/plugin/edit/fix/fix_core.dart';
@@ skipping 232 matching lines @@
     return new EditOrganizeDirectivesResult(fileEdit).toResponse(request.id);
   }
 
   Response sortMembers(Request request) {
     var params = new EditSortMembersParams.fromRequest(request);
     // prepare file
     String file = params.file;
     if (!engine.AnalysisEngine.isDartFileName(file)) {
       return new Response.sortMembersInvalidFile(request);
     }
-    // prepare resolved units
-    List<CompilationUnit> units = server.getResolvedCompilationUnits(file);
-    if (units.isEmpty) {
+    // prepare location
+    ContextSourcePair contextSource = server.getContextSourcePair(file);
+    engine.AnalysisContext context = contextSource.context;
+    Source source = contextSource.source;
+    if (context == null || source == null) {
       return new Response.sortMembersInvalidFile(request);
     }
-    // prepare context
-    CompilationUnit unit = units.first;
-    engine.AnalysisContext context = unit.element.context;
-    Source source = unit.element.source;
+    // prepare parsed unit
+    CompilationUnit unit;
+    try {
+      unit = context.parseCompilationUnit(source);
+    } catch (e) {
+      return new Response.sortMembersInvalidFile(request);
+    }
     // check if there are scan/parse errors in the file
     engine.AnalysisErrorInfo errors = context.getErrors(source);
     int numScanParseErrors = _getNumberOfScanParseErrors(errors.errors);
     if (numScanParseErrors != 0) {
       return new Response.sortMembersParseErrors(request, numScanParseErrors);
     }
     // do sort
     int fileStamp = context.getModificationStamp(source);
     String code = context.getContents(source).data;
     MemberSorter sorter = new MemberSorter(code, unit);
@@ skipping 469 matching lines @@
     }
     return new RefactoringStatus();
   }
 }
 
 /**
  * [_RefactoringManager] throws instances of this class internally to stop
  * processing in a manager that was reset.
  */
 class _ResetError {}