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<?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/Mime/ContentEncoder.php';
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//@require 'Swift/Encoder/QpEncoder.php';
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//@require 'Swift/InputByteStrean.php';
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//@require 'Swift/OutputByteStream.php';
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//@require 'Swift/CharacterStream.php';
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/**
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* Handles Quoted Printable (QP) Transfer Encoding in Swift Mailer.
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* @package Swift
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* @subpackage Mime
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* @author Chris Corbyn
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*/
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class Swift_Mime_ContentEncoder_QpContentEncoder extends Swift_Encoder_QpEncoder
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implements Swift_Mime_ContentEncoder
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{
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/**
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* Creates a new QpContentEncoder for the given CharacterStream.
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* @param Swift_CharacterStream $charStream to use for reading characters
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* @param Swift_StreamFilter $filter if canonicalization should occur
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*/
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public function __construct(Swift_CharacterStream $charStream,
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Swift_StreamFilter $filter = null)
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{
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parent::__construct($charStream, $filter);
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}
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/**
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* Encode stream $in to stream $out.
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* QP encoded strings have a maximum line length of 76 characters.
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* If the first line needs to be shorter, indicate the difference with
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* $firstLineOffset.
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* @param Swift_OutputByteStream $os output stream
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* @param Swift_InputByteStream $is input stream
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* @param int $firstLineOffset
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* @param int $maxLineLength
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*/
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public function encodeByteStream(
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Swift_OutputByteStream $os, Swift_InputByteStream $is, $firstLineOffset = 0,
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$maxLineLength = 0)
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{
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if ($maxLineLength > 76 || $maxLineLength <= 0)
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{
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$maxLineLength = 76;
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}
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$thisLineLength = $maxLineLength - $firstLineOffset;
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$this->_charStream->flushContents();
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$this->_charStream->importByteStream($os);
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$currentLine = '';
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$prepend = '';
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$size=$lineLen=0;
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while (false !== $bytes = $this->_nextSequence())
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{
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//If we're filtering the input
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if (isset($this->_filter))
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{
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//If we can't filter because we need more bytes
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while ($this->_filter->shouldBuffer($bytes))
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{
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//Then collect bytes into the buffer
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if (false === $moreBytes = $this->_nextSequence(1))
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{
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break;
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}
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foreach ($moreBytes as $b)
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{
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$bytes[] = $b;
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}
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}
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//And filter them
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$bytes = $this->_filter->filter($bytes);
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}
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$enc = $this->_encodeByteSequence($bytes, $size);
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if ($currentLine && $lineLen+$size >= $thisLineLength)
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{
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$is->write($prepend . $this->_standardize($currentLine));
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$currentLine = '';
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$prepend = "=\r\n";
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$thisLineLength = $maxLineLength;
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$lineLen=0;
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}
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$lineLen+=$size;
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$currentLine .= $enc;
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}
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if (strlen($currentLine))
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{
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$is->write($prepend . $this->_standardize($currentLine));
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}
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}
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/**
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* Get the name of this encoding scheme.
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* Returns the string 'quoted-printable'.
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* @return string
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*/
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public function getName()
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{
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return 'quoted-printable';
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}
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}
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