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<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require_once dirname(__FILE__) . '/../HeaderEncoder.php';
require_once dirname(__FILE__) . '/../../Encoder/QpEncoder.php';
require_once dirname(__FILE__) . '/../../CharacterStream.php';
/**
* Handles Quoted Printable (Q) Header Encoding in Swift Mailer.
* @package Swift
* @subpackage Mime
* @author Chris Corbyn
*/
class Swift_Mime_HeaderEncoder_QpHeaderEncoder extends Swift_Encoder_QpEncoder
implements Swift_Mime_HeaderEncoder
{
private static $_headerSafeMap = array();
/**
* Creates a new QpHeaderEncoder for the given CharacterStream.
* @param Swift_CharacterStream $charStream to use for reading characters
*/
public function __construct(Swift_CharacterStream $charStream)
{
parent::__construct($charStream);
if (empty(self::$_headerSafeMap))
{
foreach (array_merge(
range(0x61, 0x7A), range(0x41, 0x5A),
range(0x30, 0x39), array(0x20, 0x21, 0x2A, 0x2B, 0x2D, 0x2F)
) as $byte)
{
self::$_headerSafeMap[$byte] = chr($byte);
}
}
}
/**
* Get the name of this encoding scheme.
* Returns the string 'Q'.
* @return string
*/
public function getName()
{
return 'Q';
}
/**
* Takes an unencoded string and produces a Q encoded string from it.
* @param string $string to encode
* @param int $firstLineOffset, optional
* @param int $maxLineLength, optional, 0 indicates the default of 76 chars
* @return string
*/
public function encodeString($string, $firstLineOffset = 0,
$maxLineLength = 0)
{
return str_replace(array(' ', '=20', "=\r\n"), array('_', '_', "\r\n"),
parent::encodeString($string, $firstLineOffset, $maxLineLength)
);
}
// -- Overridden points of extension
/**
* Encode the given byte array into a verbatim QP form.
* @param int[] $bytes
* @return string
* @access protected
*/
protected function _encodeByteSequence(array $bytes, &$size)
{
$ret = '';
$size=0;
foreach ($bytes as $b)
{
if (isset(self::$_headerSafeMap[$b]))
{
$ret .= self::$_headerSafeMap[$b];
++$size;
}
else
{
$ret .= self::$_qpMap[$b];
$size+=3;
}
}
return $ret;
}
}
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