mirror of
https://github.com/vichan-devel/vichan.git
synced 2024-11-27 17:00:52 +01:00
90 lines
2.6 KiB
PHP
90 lines
2.6 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Class Minify_CommentPreserver
|
||
|
|
* @package Minify
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Process a string in pieces preserving C-style comments that begin with "/*!"
|
||
|
|
*
|
||
|
|
* @package Minify
|
||
|
|
* @author Stephen Clay <steve@mrclay.org>
|
||
|
|
*/
|
||
|
|
class Minify_CommentPreserver {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* String to be prepended to each preserved comment
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public static $prepend = "\n";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* String to be appended to each preserved comment
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public static $append = "\n";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Process a string outside of C-style comments that begin with "/*!"
|
||
|
|
*
|
||
|
|
* On each non-empty string outside these comments, the given processor
|
||
|
|
* function will be called. The comments will be surrounded by
|
||
|
|
* Minify_CommentPreserver::$preprend and Minify_CommentPreserver::$append.
|
||
|
|
*
|
||
|
|
* @param string $content
|
||
|
|
* @param callback $processor function
|
||
|
|
* @param array $args array of extra arguments to pass to the processor
|
||
|
|
* function (default = array())
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public static function process($content, $processor, $args = array())
|
||
|
|
{
|
||
|
|
$ret = '';
|
||
|
|
while (true) {
|
||
|
|
list($beforeComment, $comment, $afterComment) = self::_nextComment($content);
|
||
|
|
if ('' !== $beforeComment) {
|
||
|
|
$callArgs = $args;
|
||
|
|
array_unshift($callArgs, $beforeComment);
|
||
|
|
$ret .= call_user_func_array($processor, $callArgs);
|
||
|
|
}
|
||
|
|
if (false === $comment) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
$ret .= $comment;
|
||
|
|
$content = $afterComment;
|
||
|
|
}
|
||
|
|
return $ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extract comments that YUI Compressor preserves.
|
||
|
|
*
|
||
|
|
* @param string $in input
|
||
|
|
*
|
||
|
|
* @return array 3 elements are returned. If a YUI comment is found, the
|
||
|
|
* 2nd element is the comment and the 1st and 3rd are the surrounding
|
||
|
|
* strings. If no comment is found, the entire string is returned as the
|
||
|
|
* 1st element and the other two are false.
|
||
|
|
*/
|
||
|
|
private static function _nextComment($in)
|
||
|
|
{
|
||
|
|
if (
|
||
|
|
false === ($start = strpos($in, '/*!'))
|
||
|
|
|| false === ($end = strpos($in, '*/', $start + 3))
|
||
|
|
) {
|
||
|
|
return array($in, false, false);
|
||
|
|
}
|
||
|
|
$ret = array(
|
||
|
|
substr($in, 0, $start)
|
||
|
|
,self::$prepend . '/*!' . substr($in, $start + 3, $end - $start - 1) . self::$append
|
||
|
|
);
|
||
|
|
$endChars = (strlen($in) - $end - 2);
|
||
|
|
$ret[] = (0 === $endChars)
|
||
|
|
? ''
|
||
|
|
: substr($in, -$endChars);
|
||
|
|
return $ret;
|
||
|
|
}
|
||
|
|
}
|