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| 1 | <?php |
| 2 | /** |
| 3 | * @file |
| 4 | * @license https://opensource.org/licenses/Apache-2.0 Apache-2.0 |
| 5 | */ |
| 6 | |
| 7 | namespace Wikimedia\CSS\Sanitizer; |
| 8 | |
| 9 | use Wikimedia\CSS\Objects\AtRule; |
| 10 | use Wikimedia\CSS\Objects\CSSObject; |
| 11 | use Wikimedia\CSS\Objects\Rule; |
| 12 | use Wikimedia\CSS\Util; |
| 13 | |
| 14 | /** |
| 15 | * Sanitizes the margin at-rules inside a CSS \@page rule |
| 16 | * @see https://www.w3.org/TR/2018/WD-css-page-3-20181018/ |
| 17 | */ |
| 18 | class MarginAtRuleSanitizer extends RuleSanitizer { |
| 19 | |
| 20 | /** @var string[] */ |
| 21 | protected static $marginRuleNames = [ |
| 22 | 'top-left-corner', 'top-left', 'top-center', 'top-right', 'top-right-corner', |
| 23 | 'bottom-left-corner', 'bottom-left', 'bottom-center', 'bottom-right', 'bottom-right-corner', |
| 24 | 'left-top', 'left-middle', 'left-bottom', 'right-top', 'right-middle', 'right-bottom', |
| 25 | ]; |
| 26 | |
| 27 | /** @var PropertySanitizer */ |
| 28 | protected $propertySanitizer; |
| 29 | |
| 30 | /** |
| 31 | * @param PropertySanitizer $propertySanitizer Sanitizer for declarations |
| 32 | */ |
| 33 | public function __construct( PropertySanitizer $propertySanitizer ) { |
| 34 | $this->propertySanitizer = $propertySanitizer; |
| 35 | } |
| 36 | |
| 37 | /** @inheritDoc */ |
| 38 | public function handlesRule( Rule $rule ) { |
| 39 | return $rule instanceof AtRule && |
| 40 | in_array( strtolower( $rule->getName() ), self::$marginRuleNames, true ); |
| 41 | } |
| 42 | |
| 43 | /** @inheritDoc */ |
| 44 | protected function doSanitize( CSSObject $object ) { |
| 45 | if ( !$object instanceof AtRule || !$this->handlesRule( $object ) ) { |
| 46 | $this->sanitizationError( 'expected-page-margin-at-rule', $object ); |
| 47 | return null; |
| 48 | } |
| 49 | |
| 50 | if ( $object->getBlock() === null ) { |
| 51 | $this->sanitizationError( 'at-rule-block-required', $object, [ $object->getName() ] ); |
| 52 | return null; |
| 53 | } |
| 54 | |
| 55 | // No non-whitespace prelude allowed |
| 56 | if ( Util::findFirstNonWhitespace( $object->getPrelude() ) ) { |
| 57 | $this->sanitizationError( 'invalid-page-margin-at-rule', $object, [ $object->getName() ] ); |
| 58 | return null; |
| 59 | } |
| 60 | |
| 61 | $ret = clone $object; |
| 62 | $this->fixPreludeWhitespace( $ret, false ); |
| 63 | $this->sanitizeDeclarationBlock( $ret->getBlock(), $this->propertySanitizer ); |
| 64 | |
| 65 | return $ret; |
| 66 | } |
| 67 | } |