/**
* Process a comment and return a replacement
*
* @param array $m regex matches
*
* @return string
*/
protected static function _commentCB($m)
{
$m = $m[1];
// $m is the comment content w/o the surrounding tokens,
// but the return value will replace the entire comment.
if ($m === 'keep') {
return '/**/';
}
if ($m === '" "') {
// component of http://tantek.com/CSS/Examples/midpass.html
return '/*" "*/';
}
if (preg_match('@";\\}\\s*\\}/\\*\\s+@', $m)) {
// component of http://tantek.com/CSS/Examples/midpass.html
return '/*";}}/* */';
}
if (self::$_inHack) {
// inversion: feeding only to one browser
if (preg_match('@
^/ # comment started like /*/
\\s*
(\\S[\\s\\S]+?) # has at least some non-ws content
\\s*
/\\* # ends like /*/ or /**/
@x', $m, $n)) {
// end hack mode after this comment, but preserve the hack and comment content
self::$_inHack = false;
return "/*/{$n[1]}/**/";
}
}
if (substr($m, -1) === '\\') {
// comment ends like \*/
// begin hack mode and preserve hack
self::$_inHack = true;
return '/*\\*/';
}
if ($m !== '' && $m[0] === '/') {
// comment looks like /*/ foo */
// begin hack mode and preserve hack
self::$_inHack = true;
return '/*/*/';
}
if (self::$_inHack) {
// a regular comment ends hack mode but should be preserved
self::$_inHack = false;
return '/**/';
}
return '';
// remove all other comments
}
/**
* Process what looks like a comment and return a replacement
*
* @param array $m regex matches
*
* @return string
*/
protected static function _commentCB($m)
{
$m = $m[1];
// $m is everything after the opening tokens and before the closing
// tokens but return will replace the entire comment.
if ($m === 'keep') {
return '/*keep*/';
}
if (self::$_inHack) {
// inversion: feeding only to one browser
if (preg_match('/^\\/\\s*(\\S[\\s\\S]+?)\\s*\\/\\*/', $m, $n)) {
self::$_inHack = false;
return "/*/{$n[1]}/*keep*/";
}
}
if (substr($m, -1) === '\\') {
self::$_inHack = true;
return '/*\\*/';
}
if ($m[0] === '/') {
self::$_inHack = true;
return '/*/*/';
}
if (self::$_inHack) {
self::$_inHack = false;
return '/*keep*/';
}
return '';
}