Subversion-Projekte lars-tiefland.php_share

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Revision Autor Zeilennr. Zeile
1 lars 1 
<?php
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/*
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 * This file is part of SwiftMailer.
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 * (c) 2004-2009 Chris Corbyn
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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//@require 'Swift/Encoder.php';
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//@require 'Swift/CharacterStream.php';
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/**
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 * Handles RFC 2231 specified Encoding in Swift Mailer.
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 * @package Swift
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 * @subpackage Encoder
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 * @author Chris Corbyn
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 */
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class Swift_Encoder_Rfc2231Encoder implements Swift_Encoder
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{
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  /**
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   * A character stream to use when reading a string as characters instead of bytes.
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   * @var Swift_CharacterStream
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   * @access private
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   */
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  private $_charStream;
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  /**
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   * Creates a new Rfc2231Encoder using the given character stream instance.
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   * @param Swift_CharacterStream
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   */
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  public function __construct(Swift_CharacterStream $charStream)
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  {
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    $this->_charStream = $charStream;
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  }
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  /**
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   * Takes an unencoded string and produces a string encoded according to
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   * RFC 2231 from it.
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   * @param string $string to encode
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   * @param int $firstLineOffset
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   * @param int $maxLineLength, optional, 0 indicates the default of 75 bytes
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   * @return string
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   */
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  public function encodeString($string, $firstLineOffset = 0,
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    $maxLineLength = 0)
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  {
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    $lines = array(); $lineCount = 0;
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    $lines[] = '';
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    $currentLine =& $lines[$lineCount++];
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    if (0 >= $maxLineLength)
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    {
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      $maxLineLength = 75;
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    }
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    $this->_charStream->flushContents();
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    $this->_charStream->importString($string);
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    $thisLineLength = $maxLineLength - $firstLineOffset;
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    while (false !== $char = $this->_charStream->read(4))
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    {
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      $encodedChar = rawurlencode($char);
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      if (0 != strlen($currentLine)
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        && strlen($currentLine . $encodedChar) > $thisLineLength)
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      {
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        $lines[] = '';
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        $currentLine =& $lines[$lineCount++];
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        $thisLineLength = $maxLineLength;
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      }
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      $currentLine .= $encodedChar;
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    }
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    return implode("\r\n", $lines);
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  }
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  /**
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   * Updates the charset used.
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   * @param string $charset
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   */
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  public function charsetChanged($charset)
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  {
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    $this->_charStream->setCharacterSet($charset);
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  }
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}