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<?php
/**
* SCSSPHP
*
* @copyright 2012-2020 Leaf Corcoran
*
* @license http://opensource.org/licenses/MIT MIT
*
* @link http://scssphp.github.io/scssphp
*/
namespace ScssPhp\ScssPhp\Ast\Selector;
use ScssPhp\ScssPhp\Visitor\AnySelectorVisitor;
/**
* The visitor used to implement {@see Selector::isInvisible}.
*
* @internal
*/
final class IsInvisibleVisitor extends AnySelectorVisitor
{
/**
* Whether to consider selectors with bogus combinators invisible.
*
* @var bool
* @readonly
*/
private $includeBogus;
public function __construct(bool $includeBogus)
{
$this->includeBogus = $includeBogus;
}
public function visitSelectorList(SelectorList $list): bool
{
foreach ($list->getComponents() as $complex) {
if (!$this->visitComplexSelector($complex)) {
return false;
}
}
return true;
}
public function visitComplexSelector(ComplexSelector $complex): bool
{
return parent::visitComplexSelector($complex) || ($this->includeBogus && $complex->isBogusOtherThanLeadingCombinator());
}
public function visitPlaceholderSelector(PlaceholderSelector $placeholder): bool
{
return true;
}
public function visitPseudoSelector(PseudoSelector $pseudo): bool
{
$selector = $pseudo->getSelector();
if ($selector === null) {
return false;
}
// We don't consider `:not(%foo)` to be invisible because, semantically, it
// means "doesn't match this selector that matches nothing", so it's
// equivalent to *. If the entire compound selector is composed of `:not`s
// with invisible lists, the serializer emits it as `*`.
return $pseudo->getName() === 'not' ? ($this->includeBogus && $selector->isBogus()) : $selector->accept($this);
}
}
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