/** Test if the given Header is always displayed */
private function _isDisplayed(Swift_Mime_Header $header)
{
return array_key_exists(strtolower($header->getFieldName()), $this->_required);
}
/** Apply the charset to the Header */
private function _setHeaderCharset(Swift_Mime_Header $header)
{
if (isset($this->_charset)) {
$header->setCharset($this->_charset);
}
}
/**
* Encode needed word tokens within a string of input.
*
* @param Swift_Mime_Header $header
* @param string $input
* @param string $usedLength optional
*
* @return string
*/
protected function encodeWords(Swift_Mime_Header $header, $input, $usedLength = -1)
{
$value = '';
$tokens = $this->getEncodableWordTokens($input);
foreach ($tokens as $token) {
// See RFC 2822, Sect 2.2 (really 2.2 ??)
if ($this->tokenNeedsEncoding($token)) {
// Don't encode starting WSP
$firstChar = substr($token, 0, 1);
switch ($firstChar) {
case ' ':
case "\t":
$value .= $firstChar;
$token = substr($token, 1);
}
if (-1 == $usedLength) {
$usedLength = strlen($header->getFieldName() . ': ') + strlen($value);
}
$value .= $this->getTokenAsEncodedWord($token, $usedLength);
$header->setMaxLineLength(76);
// Forcefully override
} else {
$value .= $token;
}
}
return $value;
}
