From ea74610723f789fbe478803fc71babcb5d6642f9 Mon Sep 17 00:00:00 2001
From: Robert Queck <robert.queck@dampfer.net>
Date: Tue, 11 Dec 2012 14:31:22 +0100
Subject: [PATCH] jumping progress bar fix for windows & unix

---
 .../Component/Console/Helper/ProgressHelper.php      |  8 +++++++-
 .../Console/Tests/Helper/ProgressHelperTest.php      | 12 +++++++++++-
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/Symfony/Component/Console/Helper/ProgressHelper.php b/src/Symfony/Component/Console/Helper/ProgressHelper.php
index e2db53bc5f..2ae910a920 100644
--- a/src/Symfony/Component/Console/Helper/ProgressHelper.php
+++ b/src/Symfony/Component/Console/Helper/ProgressHelper.php
@@ -36,6 +36,7 @@ class ProgressHelper extends Helper
     private $format       = null;
     private $redrawFreq   = 1;
 
+    private $lastMessagesLength;
     private $barCharOriginal;
 
     /**
@@ -384,8 +385,13 @@ class ProgressHelper extends Helper
     private function overwrite(OutputInterface $output, $messages)
     {
         $output->write("\x0D"); // carriage return
-        $output->write("\x1B\x5B\x4B"); // clear line
+        if($this->lastMessagesLength!==null){
+            $output->write(str_repeat("\x20", $this->lastMessagesLength)); //clear the line with the length of the last message
+            $output->write("\x0D"); // carriage return
+        }
         $output->write($messages);
+
+        $this->lastMessagesLength=strlen($messages);
     }
 
     /**
diff --git a/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php b/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
index 8eafb57f79..0b407d0caf 100644
--- a/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
+++ b/src/Symfony/Component/Console/Tests/Helper/ProgressHelperTest.php
@@ -80,8 +80,18 @@ class ProgressHelperTest extends \PHPUnit_Framework_TestCase
         return new StreamOutput(fopen('php://memory', 'r+', false));
     }
 
+    protected $lastMessagesLength;
+
     protected function generateOutput($expected)
     {
-        return "\x0D\x1B\x5B\x4B".$expected;
+        $expectedout = $expected;
+
+        if($this->lastMessagesLength!==null){
+            $expectedout=str_repeat("\x20", $this->lastMessagesLength)."\x0D".$expected;
+        }
+
+        $this->lastMessagesLength=strlen($expected);
+
+        return "\x0D".$expectedout;
     }
 }