/**
* Replace conditional placeholders used by Internet Explorer.
*
* @param string $contents
* @param \ArjanSchouten\HtmlMinifier\PlaceholderContainer $placeholderContainer
*
* @return string
*/
protected function setConditionalCommentsPlaceholder($contents, PlaceholderContainer $placeholderContainer)
{
return preg_replace_callback('/
(
<! # Match the start of a comment
(-{2})? # IE can understand comments without dashes
\\[ # Match the start ("[" is a metachar => escape it)
(?:(?!\\]>).)* # Match everything except "]>"
\\]> # Match end
)
(
(?:
(?!<!\\[endif\\]-{2}?>)
.)*
) # Match everything except end of conditional comment
(
<!\\[endif\\]
(?:\\2|(?=>)) # Use a trick to ensure that when dashes are captured they are...
# matched at the end! Else make sure that the next char is a ">"!
> # Match the endif with the captured dashes
)
/xis', function ($match) use($placeholderContainer) {
if (!empty(preg_replace('/\\s*/', '', $match[3]))) {
return $placeholderContainer->addPlaceholder($match[1]) . $match[3] . $placeholderContainer->addPlaceholder($match[4]);
} else {
return '';
}
}, $contents);
}
/**
* Add placeholder for blade specific control structures.
*
* @param string $contents
* @param \ArjanSchouten\HtmlMinifier\PlaceholderContainer $placeholderContainer
*
* @return string
*/
protected function setBladeControlStructuresPlaceholder($contents, PlaceholderContainer $placeholderContainer)
{
return preg_replace_callback('/@\\w*(\\s*\\(.*\\))?/', function ($match) use($placeholderContainer) {
return $placeholderContainer->addPlaceholder($match[0]);
}, $contents);
}
/**
* @param string $contents
* @param \ArjanSchouten\HtmlMinifier\PlaceholderContainer $placeholderContainer
*
* @return string
*/
protected function replaceElements($contents, PlaceholderContainer $placeholderContainer)
{
$htmlTags = implode('|', $this->htmlPlaceholderTags);
$pattern = '/
(
<(' . $htmlTags . ')
(?:
[^"\'>]*|"[^"]*"|\'[^\']*\'
)*
>
)
((?:(?!<\\/\\2>).)+)
(<\\/\\2>)/xis';
return preg_replace_callback($pattern, function ($match) use($placeholderContainer) {
return $match[1] . $placeholderContainer->addPlaceholder($match[3]) . $match[4];
}, $contents);
}
private function calculateInputLength($input)
{
return mb_strlen($input, '8bit') + $this->placeholderContainer->getOriginalSize() - $this->placeholderContainer->getPlaceholderSize();
}
