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MarginAtRuleSanitizer.php
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MarginAtRuleSanitizer.php
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<?php
/**
* @file
* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
*/
namespace Wikimedia\CSS\Sanitizer;
use Wikimedia\CSS\Objects\AtRule;
use Wikimedia\CSS\Objects\CSSObject;
use Wikimedia\CSS\Objects\Rule;
use Wikimedia\CSS\Util;
/**
* Sanitizes the margin at-rules inside a CSS \@page rule
* @see https://www.w3.org/TR/2018/WD-css-page-3-20181018/
*/
class MarginAtRuleSanitizer extends RuleSanitizer {
/** @var string[] */
protected static $marginRuleNames = [
'top-left-corner', 'top-left', 'top-center', 'top-right', 'top-right-corner',
'bottom-left-corner', 'bottom-left', 'bottom-center', 'bottom-right', 'bottom-right-corner',
'left-top', 'left-middle', 'left-bottom', 'right-top', 'right-middle', 'right-bottom',
];
/** @var PropertySanitizer */
protected $propertySanitizer;
/**
* @param PropertySanitizer $propertySanitizer Sanitizer for declarations
*/
public function __construct( PropertySanitizer $propertySanitizer ) {
$this->propertySanitizer = $propertySanitizer;
}
/** @inheritDoc */
public function handlesRule( Rule $rule ) {
return $rule instanceof AtRule &&
in_array( strtolower( $rule->getName() ), self::$marginRuleNames, true );
}
/** @inheritDoc */
protected function doSanitize( CSSObject $object ) {
if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) {
$this->sanitizationError( 'expected-page-margin-at-rule', $object );
return null;
}
if ( $object->getBlock() === null ) {
$this->sanitizationError( 'at-rule-block-required', $object, [ $object->getName() ] );
return null;
}
// No non-whitespace prelude allowed
if ( Util::findFirstNonWhitespace( $object->getPrelude() ) ) {
$this->sanitizationError( 'invalid-page-margin-at-rule', $object, [ $object->getName() ] );
return null;
}
$ret = clone $object;
$this->fixPreludeWhitespace( $ret, false );
$this->sanitizeDeclarationBlock( $ret->getBlock(), $this->propertySanitizer );
return $ret;
}
}

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Aug 19 2026, 19:29 (6 w, 6 d ago)
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MarginAtRuleSanitizer.php (1 KB)

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