/**
* Execute the minification rule.
*
* @param \ArjanSchouten\HtmlMinifier\MinifyContext $context
*
* @return \ArjanSchouten\HtmlMinifier\MinifyContext
*/
public function process(MinifyContext $context)
{
return $context->setContents(preg_replace_callback('/
(\\s*' . Constants::ATTRIBUTE_NAME_REGEX . '\\s*) # Match the attribute name
=\\s* # Match the equal sign with optional whitespaces
(["\']) # Match quotes and capture for backreferencing
\\s* # Strange but possible to have a whitespace in an attribute
\\2 # Backreference to the matched quote
\\s*
/x', function ($match) {
if ($this->isBooleanAttribute($match[1])) {
return Html::isLastAttribute($match[0]) ? $match[1] : $match[1] . ' ';
}
return Html::hasSurroundingAttributes($match[0]) ? ' ' : '';
}, $context->getContents()));
}
/**
* Remove the attribute from the element.
*
* @param string $element
* @param string $attribute
*
* @return string
*/
protected function removeAttribute($element, $attribute)
{
$replacement = Html::hasSurroundingAttributes($attribute) ? ' ' : '';
return str_replace($attribute, $replacement, $element);
}