<?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 RFC 2231 specified Encoding in Swift Mailer. * * @author Chris Corbyn */ class Swift_Encoder_Rfc2231Encoder implements Swift_Encoder { /** * A character stream to use when reading a string as characters instead of bytes. * * @var Swift_CharacterStream */ private $_charStream; /** * Creates a new Rfc2231Encoder using the given character stream instance. * * @param Swift_CharacterStream */ public function __construct(Swift_CharacterStream $charStream) { $this->_charStream = $charStream; } /** * Takes an unencoded string and produces a string encoded according to * RFC 2231 from it. * * @param string $string * @param int $firstLineOffset * @param int $maxLineLength optional, 0 indicates the default of 75 bytes * * @return string */ public function encodeString($string, $firstLineOffset = 0, $maxLineLength = 0) { $lines = array(); $lineCount = 0; $lines[] = ''; $currentLine = &$lines[$lineCount++]; if (0 >= $maxLineLength) { $maxLineLength = 75; } $this->_charStream->flushContents(); $this->_charStream->importString($string); $thisLineLength = $maxLineLength - $firstLineOffset; while (false !== $char = $this->_charStream->read(4)) { $encodedChar = rawurlencode($char); if (0 != strlen($currentLine) && strlen($currentLine.$encodedChar) > $thisLineLength) { $lines[] = ''; $currentLine = &$lines[$lineCount++]; $thisLineLength = $maxLineLength; } $currentLine .= $encodedChar; } return implode("\r\n", $lines); } /** * Updates the charset used. * * @param string $charset */ public function charsetChanged($charset) { $this->_charStream->setCharacterSet($charset); } /** * Make a deep copy of object. */ public function __clone() { $this->_charStream = clone $this->_charStream; } }