Move an old change into a new client. Old client got messed up.

tools/ddbg/lib/commando.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.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
 
 import 'terminfo.dart';
@@ skipping 245 matching lines @@
   void _home() {
     _updatePos(0);
   }
 
   void _end() {
     _updatePos(_currentLine.length);
   }
 
   void _clearScreen() {
     _stdout.write(_term.clear);
+    _term.resize();
+    _screenWidth = _term.cols - 1;
     _writePromptAndLine();
   }
 
   void _kill() {
     var newLine = [];
     newLine.addAll(_currentLine.take(_cursorPos));
     _killBuffer = _currentLine.skip(_cursorPos).toList();
     _update(newLine, _cursorPos);
   }
 
@@ skipping 89 matching lines @@
     _linePos = _lines.length;
 
     _end();
     _stdout.writeln();
 
     // Call the user's command handler.
     _handleCommand(new String.fromCharCodes(_currentLine));
     
     _currentLine = [];
     _cursorPos = 0;
-    _linePos = _lines.length;
     if (_promptShown) {
       _writePrompt();
     }
   }
 
   void _leftArrow() {
     _updatePos(_cursorPos - 1);
   }
 
   void _rightArrow() {
@@ skipping 200 matching lines @@
       for (var i = 0; i < (newCol - curCol); i++) {
         _stdout.write(_term.cursorForward);
       }
     }
 
     return newPos;
   }
         
   int _nextMargin(int pos) {
     var truePos = pos + prompt.length;
-    var curLine = _getLine(pos);
     return ((truePos ~/ _screenWidth) + 1) * _screenWidth - prompt.length;
   }
 
   int _getLine(int pos) {
     var truePos = pos + prompt.length;
     return truePos ~/ _screenWidth;
   }
 
   int _getCol(int pos) {
     var truePos = pos + prompt.length;
@@ skipping 96 matching lines @@
     print('Received command($command)');
   }
 }
 
 
 void main() {
   stdout.writeln('[Commando demo]');
   cmd = new Commando(stdin, stdout, _handleCommand,
                      completer:_myCompleter);
 }