Update LineInfo during incremental resolution.

pkg/analyzer/lib/src/generated/incremental_resolver.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 engine.incremental_resolver;
 
 import 'dart:collection';
 import 'dart:math' as math;
 
 import 'package:analyzer/src/context/cache.dart'
     show CacheEntry, TargetedResult;
 import 'package:analyzer/src/generated/constant.dart';
 import 'package:analyzer/src/task/dart.dart'
     show
         HINTS,
         PARSE_ERRORS,
         RESOLVE_REFERENCES_ERRORS,
         RESOLVE_TYPE_NAMES_ERRORS,
         SCAN_ERRORS,
         USED_IMPORTED_ELEMENTS,
         USED_LOCAL_ELEMENTS,
         VARIABLE_REFERENCE_ERRORS,
         VERIFY_ERRORS;
 import 'package:analyzer/task/dart.dart'
     show DART_ERRORS, LibrarySpecificUnit, PARSED_UNIT, TOKEN_STREAM;
-import 'package:analyzer/task/general.dart' show CONTENT;
+import 'package:analyzer/task/general.dart' show CONTENT, LINE_INFO;
 import 'package:analyzer/task/model.dart' show ResultDescriptor;
 
 import 'ast.dart';
 import 'element.dart';
 import 'engine.dart';
 import 'error.dart';
 import 'error_verifier.dart';
 import 'incremental_logger.dart' show logger, LoggingTimer;
 import 'java_engine.dart';
 import 'parser.dart';
@@ skipping 1231 matching lines @@
 
   final CompilationUnit _oldUnit;
   final AnalysisOptions _options;
   CompilationUnitElement _unitElement;
 
   int _updateOffset;
   int _updateDelta;
   int _updateEndOld;
   int _updateEndNew;
 
+  LineInfo _newLineInfo;
   List<AnalysisError> _newScanErrors = <AnalysisError>[];
   List<AnalysisError> _newParseErrors = <AnalysisError>[];
 
   PoorMansIncrementalResolver(this._typeProvider, this._unitSource,
       this._oldEntry, this._newSourceEntry, this._newUnitEntry, this._oldUnit,
       bool resolveApiChanges, this._options) {
     _resolveApiChanges = resolveApiChanges;
   }
 
   /**
@@ skipping 214 matching lines @@
     incrementalResolver._resolveReferences(newComment);
     // OK
     return true;
   }
 
   Token _scan(String code) {
     RecordingErrorListener errorListener = new RecordingErrorListener();
     CharSequenceReader reader = new CharSequenceReader(code);
     Scanner scanner = new Scanner(_unitSource, reader, errorListener);
     Token token = scanner.tokenize();
+    _newLineInfo = new LineInfo(scanner.lineStarts);
     _newScanErrors = errorListener.errors;
     return token;
   }
 
   /**
    * Set the given [comment] as a "precedingComments" for [token].
    */
   void _setPrecedingComments(Token token, CommentToken comment) {
     if (token is BeginTokenWithComment) {
       token.precedingComments = comment;
@@ skipping 36 matching lines @@
       _updateEntry_NEW();
     }
   }
 
   void _updateEntry_NEW() {
     _newSourceEntry.setState(DART_ERRORS, CacheState.INVALID);
     // scan results
     _newSourceEntry.setState(SCAN_ERRORS, CacheState.INVALID);
     List<TargetedResult> scanDeps =
         <TargetedResult>[new TargetedResult(_unitSource, CONTENT)];
+    _newSourceEntry.setValue(LINE_INFO, _newLineInfo, scanDeps);
     _newSourceEntry.setValue(SCAN_ERRORS, _newScanErrors, scanDeps);
     // parse results
     List<TargetedResult> parseDeps =
         <TargetedResult>[new TargetedResult(_unitSource, TOKEN_STREAM)];
     _newSourceEntry.setState(PARSE_ERRORS, CacheState.INVALID);
     _newSourceEntry.setValue(PARSE_ERRORS, _newParseErrors, parseDeps);
     _newSourceEntry.setValue(PARSED_UNIT, _oldUnit, parseDeps);
   }
 
   void _updateEntry_OLD() {
+    _oldEntry.setValue(SourceEntry.LINE_INFO, _newLineInfo);
     _oldEntry.setValue(DartEntry.SCAN_ERRORS, _newScanErrors);
     _oldEntry.setValue(DartEntry.PARSE_ERRORS, _newParseErrors);
   }
 
   /**
    * Checks if [token] has a balanced number of open and closed curly brackets.
    */
   static bool _areCurlyBracketsBalanced(Token token) {
     int numOpen = _getTokenCount(token, TokenType.OPEN_CURLY_BRACKET);
     int numOpen2 =
@@ skipping 392 matching lines @@
   @override
   String toString() => name;
 }
 
 class _TokenPair {
   final _TokenDifferenceKind kind;
   final Token oldToken;
   final Token newToken;
   _TokenPair(this.kind, this.oldToken, this.newToken);
 }