Line breaking plumbing (continued).

pkg/analyzer/lib/src/services/formatter_impl.dart

 // Copyright (c) 2013, 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 formatter_impl;
 
 import 'dart:math';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/src/generated/java_core.dart' show CharSequence;
@@ skipping 349 matching lines @@
   int leadingSpaces = 0;
 
   /// A flag to specify whether line-leading spaces should be preserved (and
   /// addded to the indent level).
   bool allowLineLeadingSpaces;
 
   /// Used for matching EOL comments
   final twoSlashes = new RegExp(r'//[^/]');
 
   /// A weight for potential breakpoints.
-  int breakWeight = null;
+  int breakWeight = DEFAULT_SPACE_WEIGHT;
 
   /// Original pre-format selection information (may be null).
   final Selection preSelection;
 
   final bool codeTransforms;
 
   /// Post format selection information.
   Selection selection;
 
 
@@ skipping 1076 matching lines @@
     }
   }
 
   emitSpaces() {
     if (leadingSpaces > 0) {
       if (allowLineLeadingSpaces || !writer.currentLine.isWhitespace()) {
         writer.spaces(leadingSpaces, breakWeight: breakWeight);
       }
       leadingSpaces = 0;
       allowLineLeadingSpaces = false;
-      breakWeight = null;
+      breakWeight = DEFAULT_SPACE_WEIGHT;
     }
   }
 
   checkForSelectionUpdate(Token token) {
     // Cache the first token on or AFTER the selection offset
     if (preSelection != null && selection == null) {
       // Check for overshots
       var overshot = token.offset - preSelection.offset;
       if (overshot >= 0) {
         //TODO(pquitslund): update length (may need truncating)
@@ skipping 200 matching lines @@
     var lastLine =
         lineInfo.getLocation(lastOffset).lineNumber;
     var currentLine =
         lineInfo.getLocation(currentOffset).lineNumber;
     return currentLine - lastLine;
   }
 
   String toString() => writer.toString();
 
 }