Initial support for generating client and server stubs for Dart.

lib/indenting_writer.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.
 
 part of protoc;
 
 class IndentingWriter implements Writer {
   final String _indentSequence;
   final Writer _writer;
   final StringBuffer _currentText = new StringBuffer();
   String _currentIndent = '';
 
   IndentingWriter(this._indentSequence, this._writer);
 
-  void addBlock(String start, String end, void body()) {
+  void addBlock(String start, String end, void body(), {endWithNewline: true}) {
     println(start);
     var oldIndent = _currentIndent;
     _currentIndent = '$_currentIndent$_indentSequence';
     body();
     _currentIndent = oldIndent;
-    println(end);
+    if (endWithNewline) {
+      println(end);
+    } else {
+      print(end);
+    }
   }
 
   void print(String stringToPrint) {
     _currentText.write(stringToPrint);
   }
 
   /*
    * Add the specified line to the output buffer with the current
    * level of indent.
    */
   void println([String out = '']) {
     // TODO - not clear how this plays cross-platform.
     // more sophisticated patterns don't seem to match.
     print(out);
     for (String line in _currentText.toString().split('\n')) {
       if (!line.isEmpty) _writer.print(_currentIndent);
       _writer.println(line);
     }
     _currentText.clear();
   }
 }