application/vendor/swiftmailer/classes/Swift/Mime/ContentEncoder/PlainContentEncoder.php

   1 <?php
   2
   3 /*
   4  * This file is part of SwiftMailer.
   5  * (c) 2004-2009 Chris Corbyn
   6  *
   7  * For the full copyright and license information, please view the LICENSE
   8  * file that was distributed with this source code.
   9  */
  10
  11 //@require 'Swift/Mime/ContentEncoder.php';
  12 //@require 'Swift/InputByteStream.php';
  13 //@require 'Swift/OutputByteStream.php';
  14
  15 /**
  16  * Handles binary/7/8-bit Transfer Encoding in Swift Mailer.
  17  * @package Swift
  18  * @subpackage Mime
  19  * @author Chris Corbyn
  20  */
  21 class Swift_Mime_ContentEncoder_PlainContentEncoder
  22   implements Swift_Mime_ContentEncoder
  23 {
  24
  25   /**
  26    * The name of this encoding scheme (probably 7bit or 8bit).
  27    * @var string
  28    * @access private
  29    */
  30   private $_name;
  31
  32   /**
  33    * True if canonical transformations should be done.
  34    * @var boolean
  35    * @access private
  36    */
  37   private $_canonical;
  38
  39   /**
  40    * Creates a new PlainContentEncoder with $name (probably 7bit or 8bit).
  41    * @param string $name
  42    * @param boolean $canonical If canonicalization transformation should be done.
  43    */
  44   public function __construct($name, $canonical = false)
  45   {
  46     $this->_name = $name;
  47     $this->_canonical = $canonical;
  48   }
  49
  50   /**
  51    * Encode a given string to produce an encoded string.
  52    * @param string $string
  53    * @param int $firstLineOffset, ignored
  54    * @param int $maxLineLength - 0 means no wrapping will occur
  55    * @return string
  56    */
  57   public function encodeString($string, $firstLineOffset = 0,
  58     $maxLineLength = 0)
  59   {
  60     if ($this->_canonical)
  61     {
  62       $string = $this->_canonicalize($string);
  63     }
  64     return $this->_safeWordWrap($string, $maxLineLength, "\r\n");
  65   }
  66
  67   /**
  68    * Encode stream $in to stream $out.
  69    * @param Swift_OutputByteStream $in
  70    * @param Swift_InputByteStream $out
  71    * @param int $firstLineOffset, ignored
  72    * @param int $maxLineLength, optional, 0 means no wrapping will occur
  73    */
  74   public function encodeByteStream(
  75     Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
  76     $maxLineLength = 0)
  77   {
  78     $leftOver = '';
  79     while (false !== $bytes = $os->read(8192))
  80     {
  81       $toencode = $leftOver . $bytes;
  82       if ($this->_canonical)
  83       {
  84         $toencode = $this->_canonicalize($toencode);
  85       }
  86       $wrapped = $this->_safeWordWrap($toencode, $maxLineLength, "\r\n");
  87       $lastLinePos = strrpos($wrapped, "\r\n");
  88       $leftOver = substr($wrapped, $lastLinePos);
  89       $wrapped = substr($wrapped, 0, $lastLinePos);
  90
  91       $is->write($wrapped);
  92     }
  93     if (strlen($leftOver))
  94     {
  95       $is->write($leftOver);
  96     }
  97   }
  98
  99   /**
 100    * Get the name of this encoding scheme.
 101    * @return string
 102    */
 103   public function getName()
 104   {
 105     return $this->_name;
 106   }
 107
 108   /**
 109    * Not used.
 110    */
 111   public function charsetChanged($charset)
 112   {
 113   }
 114
 115   // -- Private methods
 116
 117   /**
 118    * A safer (but weaker) wordwrap for unicode.
 119    * @param string $string
 120    * @param int $length
 121    * @param string $le
 122    * @return string
 123    * @access private
 124    */
 125   private function _safeWordwrap($string, $length = 75, $le = "\r\n")
 126   {
 127     if (0 >= $length)
 128     {
 129       return $string;
 130     }
 131
 132     $originalLines = explode($le, $string);
 133
 134     $lines = array();
 135     $lineCount = 0;
 136
 137     foreach ($originalLines as $originalLine)
 138     {
 139       $lines[] = '';
 140       $currentLine =& $lines[$lineCount++];
 141
 142       //$chunks = preg_split('/(?<=[\ \t,\.!\?\-&\+\/])/', $originalLine);
 143       $chunks = preg_split('/(?<=\s)/', $originalLine);
 144
 145       foreach ($chunks as $chunk)
 146       {
 147         if (0 != strlen($currentLine)
 148           && strlen($currentLine . $chunk) > $length)
 149         {
 150           $lines[] = '';
 151           $currentLine =& $lines[$lineCount++];
 152         }
 153         $currentLine .= $chunk;
 154       }
 155     }
 156
 157     return implode("\r\n", $lines);
 158   }
 159
 160   /**
 161    * Canonicalize string input (fix CRLF).
 162    * @param string $string
 163    * @return string
 164    * @access private
 165    */
 166   private function _canonicalize($string)
 167   {
 168     return str_replace(
 169       array("\r\n", "\r", "\n"),
 170       array("\n", "\n", "\r\n"),
 171       $string
 172       );
 173   }
 174
 175 }