<?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. */ /** * Handles binary/7/8-bit Transfer Encoding in Swift Mailer. * * @author Chris Corbyn */ class Swift_Mime_ContentEncoder_PlainContentEncoder implements Swift_Mime_ContentEncoder { /** * The name of this encoding scheme (probably 7bit or 8bit). * * @var string */ private $_name; /** * True if canonical transformations should be done. * * @var bool */ private $_canonical; /** * Creates a new PlainContentEncoder with $name (probably 7bit or 8bit). * * @param string $name * @param bool $canonical If canonicalization transformation should be done. */ public function __construct($name, $canonical = false) { $this->_name = $name; $this->_canonical = $canonical; } /** * Encode a given string to produce an encoded string. * * @param string $string * @param int $firstLineOffset ignored * @param int $maxLineLength - 0 means no wrapping will occur * * @return string */ public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0) { if ($this->_canonical) { $string = $this->_canonicalize($string); } return $this->_safeWordWrap($string, $maxLineLength, "\r\n"); } /** * Encode stream $in to stream $out. * * @param Swift_OutputByteStream $os * @param Swift_InputByteStream $is * @param int $firstLineOffset ignored * @param int $maxLineLength optional, 0 means no wrapping will occur */ public function encodeByteStream(Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0, $maxLineLength = 0) { $leftOver = ''; while (false !== $bytes = $os->read(8192)) { $toencode = $leftOver.$bytes; if ($this->_canonical) { $toencode = $this->_canonicalize($toencode); } $wrapped = $this->_safeWordWrap($toencode, $maxLineLength, "\r\n"); $lastLinePos = strrpos($wrapped, "\r\n"); $leftOver = substr($wrapped, $lastLinePos); $wrapped = substr($wrapped, 0, $lastLinePos); $is->write($wrapped); } if (strlen($leftOver)) { $is->write($leftOver); } } /** * Get the name of this encoding scheme. * * @return string */ public function getName() { return $this->_name; } /** * Not used. */ public function charsetChanged($charset) { } /** * A safer (but weaker) wordwrap for unicode. * * @param string $string * @param int $length * @param string $le * * @return string */ private function _safeWordwrap($string, $length = 75, $le = "\r\n") { if (0 >= $length) { return $string; } $originalLines = explode($le, $string); $lines = array(); $lineCount = 0; foreach ($originalLines as $originalLine) { $lines[] = ''; $currentLine = &$lines[$lineCount++]; //$chunks = preg_split('/(?<=[\ \t,\.!\?\-&\+\/])/', $originalLine); $chunks = preg_split('/(?<=\s)/', $originalLine); foreach ($chunks as $chunk) { if (0 != strlen($currentLine) && strlen($currentLine.$chunk) > $length) { $lines[] = ''; $currentLine = &$lines[$lineCount++]; } $currentLine .= $chunk; } } return implode("\r\n", $lines); } /** * Canonicalize string input (fix CRLF). * * @param string $string * * @return string */ private function _canonicalize($string) { return str_replace( array("\r\n", "\r", "\n"), array("\n", "\n", "\r\n"), $string ); } }