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<?php |
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namespace ArjanSchouten\HtmlMinifier\Minifiers\Html; |
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use ArjanSchouten\HtmlMinifier\Constants; |
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use ArjanSchouten\HtmlMinifier\Minifiers\MinifierInterface; |
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use ArjanSchouten\HtmlMinifier\MinifyContext; |
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use ArjanSchouten\HtmlMinifier\Options; |
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use ArjanSchouten\HtmlMinifier\Repositories\HtmlBooleanAttributeRepository; |
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use ArjanSchouten\HtmlMinifier\Util\Html; |
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class EmptyAttributeMinifier implements MinifierInterface |
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{ |
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protected $repository; |
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public function __construct() |
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{ |
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$this->repository = new HtmlBooleanAttributeRepository(); |
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} |
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/** |
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* Execute the minification rule. |
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* |
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* @param \ArjanSchouten\HtmlMinifier\MinifyContext $context |
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* |
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* @return \ArjanSchouten\HtmlMinifier\MinifyContext |
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*/ |
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public function process(MinifyContext $context) |
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{ |
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return $context->setContents(preg_replace_callback( |
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'/ |
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(\s*'.Constants::ATTRIBUTE_NAME_REGEX.'\s*) # Match the attribute name |
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=\s* # Match the equal sign with optional whitespaces |
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(["\']) # Match quotes and capture for backreferencing |
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\s* # Strange but possible to have a whitespace in an attribute |
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\2 # Backreference to the matched quote |
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\s* |
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/x', |
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function ($match) { |
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if ($this->isBooleanAttribute($match[1])) { |
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return Html::isLastAttribute($match[0]) ? $match[1] : $match[1].' '; |
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} |
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return Html::hasSurroundingAttributes($match[0]) ? ' ' : ''; |
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}, $context->getContents())); |
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} |
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/** |
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* Check if an attribute is a boolean attribute. |
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* |
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* @param string $attribute |
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* |
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* @return bool |
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*/ |
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private function isBooleanAttribute($attribute) |
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{ |
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return array_search(trim($attribute), $this->repository->getAttributes()) || Html::isDataAttribute($attribute); |
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} |
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/** |
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* @param \ArjanSchouten\HtmlMinifier\Minifiers\Html\HtmlBooleanAttributeRepository $repository |
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*/ |
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public function setRepository($repository) |
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{ |
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$this->repository = $repository; |
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} |
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/** |
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* Indicates if minification rules depends on command options. |
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* |
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* @return string |
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*/ |
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public function provides() |
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{ |
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return Options::EMPTY_ATTRIBUTES; |
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} |
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} |
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ArjanSchouten /
HtmlMinifier
