101 lines
2.6 KiB
PHP
101 lines
2.6 KiB
PHP
<?php
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/*
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Handles RFC 2231 specified Encoding in Swift Mailer.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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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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}
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