<?php
/**
* Class Minify_Lines
* @package Minify
*/
/**
* Add line numbers in C-style comments for easier debugging of combined content
*
* @package Minify
* @author Stephen Clay <steve@mrclay.org>
* @author Adam Pedersen (Issue 55 fix)
*/
class Minify_Lines {
/**
* Add line numbers in C-style comments
*
* This uses a very basic parser easily fooled by comment tokens inside
* strings or regexes, but, otherwise, generally clean code will not be
* mangled. URI rewriting can also be performed.
*
* @param string $content
*
* @param array $options available options:
*
* 'id': (optional) string to identify file. E.g. file name/path
*
* 'currentDir': (default null) if given, this is assumed to be the
* directory of the current CSS file. Using this, minify will rewrite
* all relative URIs in import/url declarations to correctly point to
* the desired files, and prepend a comment with debugging information about
* this process.
*
* @return string
*/
public static function minify($content, $options = array())
{
$id = (isset($options['id']) && $options['id'])
? $options['id']
: '';
$content = str_replace("\r\n", "\n", $content);
// Hackily rewrite strings with XPath expressions that are
// likely to throw off our dumb parser (for Prototype 1.6.1).
$content = str_replace('"/*"', '"/"+"*"', $content);
$content = preg_replace('@([\'"])(\\.?//?)\\*@', '$1$2$1+$1*', $content);
$lines = explode("\n", $content);
$numLines = count($lines);
// determine left padding
$padTo = strlen((string) $numLines); // e.g. 103 lines = 3 digits
$inComment = false;
$i = 0;
$newLines = array();
while (null !== ($line = array_shift($lines))) {
if (('' !== $id) && (0 == $i % 50)) {
if ($inComment) {
array_push($newLines, '', "/* {$id} *|", '');
} else {
array_push($newLines, '', "/* {$id} */", '');
}
}
++$i;
$newLines[] = self::_addNote($line, $i, $inComment, $padTo);
$inComment = self::_eolInComment($line, $inComment);
}
$content = implode("\n", $newLines) . "\n";
// check for desired URI rewriting
if (isset($options['currentDir'])) {
Minify_CSS_UriRewriter::$debugText = '';
$content = Minify_CSS_UriRewriter::rewrite(
$content
,$options['currentDir']
,isset($options['docRoot']) ? $options['docRoot'] : $_SERVER['DOCUMENT_ROOT']
,isset($options['symlinks']) ? $options['symlinks'] : array()
);
$content = "/* Minify_CSS_UriRewriter::\$debugText\n\n"
. Minify_CSS_UriRewriter::$debugText . "*/\n"
. $content;
}
return $content;
}
/**
* Is the parser within a C-style comment at the end of this line?
*
* @param string $line current line of code
*
* @param bool $inComment was the parser in a comment at the
* beginning of the line?
*
* @return bool
*/
private static function _eolInComment($line, $inComment)
{
// crude way to avoid things like // */
$line = preg_replace('~//.*?(\\*/|/\\*).*~', '', $line);
while (strlen($line)) {
$search = $inComment
? '*/'
: '/*';
$pos = strpos($line, $search);
if (false === $pos) {
return $inComment;
} else {
if ($pos == 0
|| ($inComment
? substr($line, $pos, 3)
: substr($line, $pos-1, 3)) != '*/*')
{
$inComment = ! $inComment;
}
$line = substr($line, $pos + 2);
}
}
return $inComment;
}
/**
* Prepend a comment (or note) to the given line
*
* @param string $line current line of code
*
* @param string $note content of note/comment
*
* @param bool $inComment was the parser in a comment at the
* beginning of the line?
*
* @param int $padTo minimum width of comment
*
* @return string
*/
private static function _addNote($line, $note, $inComment, $padTo)
{
return $inComment
? '/* ' . str_pad($note, $padTo, ' ', STR_PAD_RIGHT) . ' *| ' . $line
: '/* ' . str_pad($note, $padTo, ' ', STR_PAD_RIGHT) . ' */ ' . $line;
}
}