pkg/mime: layout as mini-libraries

pkg/mime/lib/src/mime_multipart_transformer.dart

 // Copyright (c) 2012, 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.
 
-part of mime;
+library mime.multipart_transformer;
 
+import 'dart:async';
+import 'dart:convert';
+import 'dart:typed_data';
 
 /**
  * A Mime Multipart class representing each part parsed by
  * [MimeMultipartTransformer]. The data is streamed in as it become available.
  */
 abstract class MimeMultipart extends Stream<List<int>> {
   Map<String, String> get headers;
 }
 
 class _MimeMultipart extends MimeMultipart {
   final Map<String, String> headers;
   final Stream<List<int>> _stream;
 
   _MimeMultipart(this.headers, this._stream);
 
   StreamSubscription<List<int>> listen(void onData(List<int> data),
                                        {void onDone(),
                                         Function onError,
                                         bool cancelOnError}) {
     return _stream.listen(onData,
                           onDone: onDone,
                           onError: onError,
                           cancelOnError: cancelOnError);
   }
 }
 
-class _Const {
-  // Bytes for '()<>@,;:\\"/[]?={} \t'.
-  static const SEPARATORS = const [40, 41, 60, 62, 64, 44, 59, 58, 92, 34, 47,
-                                   91, 93, 63, 61, 123, 125, 32, 9];
-}
-
 class _CharCode {
   static const int HT = 9;
   static const int LF = 10;
   static const int CR = 13;
   static const int SP = 32;
   static const int DASH = 45;
   static const int COLON = 58;
 }
 
 /**
@@ skipping 15 matching lines @@
   static const int _HEADER_VALUE_FOLDING_OR_ENDING = 7;
   static const int _HEADER_VALUE_FOLD_OR_END = 8;
   static const int _HEADER_ENDING = 9;
   static const int _CONTENT = 10;
   static const int _LAST_BOUNDARY_DASH2 = 11;
   static const int _LAST_BOUNDARY_ENDING = 12;
   static const int _LAST_BOUNDARY_END = 13;
   static const int _DONE = 14;
   static const int _FAILURE = 15;
 
+  // Bytes for '()<>@,;:\\"/[]?={} \t'.
+  static const _SEPARATORS = const [40, 41, 60, 62, 64, 44, 59, 58, 92, 34, 47,
+                                   91, 93, 63, 61, 123, 125, 32, 9];
+
   StreamController _controller;
   StreamSubscription _subscription;
 
   StreamController _multipartController;
   Map<String, String> _headers;
 
   List<int> _boundary;
   int _state = _START;
   int _boundaryIndex = 2;
 
@@ skipping 296 matching lines @@
 
     // Resume if at end.
     if (_index == _buffer.length) {
       _buffer = null;
       _index = null;
       _resumeStream();
     }
   }
 
   bool _isTokenChar(int byte) {
-    return byte > 31 && byte < 128 && _Const.SEPARATORS.indexOf(byte) == -1;
+    return byte > 31 && byte < 128 && _SEPARATORS.indexOf(byte) == -1;
   }
 
   int _toLowerCase(int byte) {
     final int aCode = "A".codeUnitAt(0);
     final int zCode = "Z".codeUnitAt(0);
     final int delta = "a".codeUnitAt(0) - aCode;
     return (aCode <= byte && byte <= zCode) ? byte + delta : byte;
   }
 
   void _expect(int val1, int val2) {
     if (val1 != val2) {
       throw new MimeMultipartException("Failed to parse multipart mime 1");
     }
   }
 
   void _expectWS(int byte) {
     if (byte != _CharCode.SP && byte != _CharCode.HT) {
       throw new MimeMultipartException("Failed to parse multipart mime 2");
     }
   }
 }
 
 
 class MimeMultipartException implements Exception {
+  final String message;
+
   const MimeMultipartException([String this.message = ""]);
+
   String toString() => "MimeMultipartException: $message";
-  final String message;
 }