Switch transformers over to source_span

pkg/third_party/html5lib/lib/src/inputstream.dart

 library inputstream;
 
 import 'dart:collection';
 import 'package:utf/utf.dart';
-import 'package:source_maps/span.dart' show SourceFile;
+import 'package:source_span/source_span.dart';
 import 'char_encodings.dart';
 import 'constants.dart';
 import 'utils.dart';
 import 'encoding_parser.dart';
 
 /// Hooks to call into dart:io without directly referencing it.
 class ConsoleSupport {
   List<int> bytesFromFile(source) => null;
 }
 
@@ skipping 112 matching lines @@
         c = NEWLINE;
       }
 
       _chars.add(c);
       if (c == NEWLINE) _lineStarts.add(_chars.length);
     }
 
     // Free decoded characters if they aren't needed anymore.
     if (_rawBytes != null) _rawChars = null;
 
-    fileInfo = new SourceFile(sourceUrl, _lineStarts,
-        generateSpans ? _chars : null);
+    fileInfo = new SourceFile.decoded(_chars, url: sourceUrl);

[Siggi Cherem (dart-lang), 2014/07/29 20:56:32]

could we do this maybe only when generateSpans is true?

  fileInfo = generateSpans ? ... : null;

that would match how we ignored the text entirely before if generateSpans was
false. It seems that all uses of fileInfo are guarded by that check as well.
Tests should just pass, if it's not easy to fix that, then let's add a TODO
about it here.

[nweiz, 2014/07/29 21:13:17]

Done.

[nweiz, 2014/07/30 00:25:53]

It turns out this made a test fail, so I changed it back and added a TODO.

   }
 
 
   void detectEncoding([bool parseMeta = true]) {
     // First look for a BOM
     // This will also read past the BOM if present
     charEncodingName = detectBOM();
     charEncodingCertain = true;
 
     // If there is no BOM need to look for meta elements with encoding
@@ skipping 135 matching lines @@
 /// Return the python codec name corresponding to an encoding or null if the
 /// string doesn't correspond to a valid encoding.
 String codecName(String encoding) {
   final asciiPunctuation = new RegExp(
       "[\u0009-\u000D\u0020-\u002F\u003A-\u0040\u005B-\u0060\u007B-\u007E]");
 
   if (encoding == null) return null;
   var canonicalName = encoding.replaceAll(asciiPunctuation, '').toLowerCase();
   return encodings[canonicalName];
 }