MediaWiki 1.30.2

[autoinstallsdev/mediawiki.git] / vendor / wikimedia / css-sanitizer / src / Sanitizer / FontFeatureValueAtRuleSanitizer.php

diff --git a/vendor/wikimedia/css-sanitizer/src/Sanitizer/FontFeatureValueAtRuleSanitizer.php b/vendor/wikimedia/css-sanitizer/src/Sanitizer/FontFeatureValueAtRuleSanitizer.php
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+++ b/vendor/wikimedia/css-sanitizer/src/Sanitizer/FontFeatureValueAtRuleSanitizer.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\Grammar\Matcher;
+use Wikimedia\CSS\Objects\AtRule;
+use Wikimedia\CSS\Objects\CSSObject;
+use Wikimedia\CSS\Objects\ComponentValueList;
+use Wikimedia\CSS\Objects\DeclarationList;
+use Wikimedia\CSS\Objects\Rule;
+use Wikimedia\CSS\Parser\Parser;
+use Wikimedia\CSS\Util;
+
+/**
+ * Sanitizes a feature-value at-rule inside a CSS \@font-feature-values rule
+ * @see https://www.w3.org/TR/2013/CR-css-fonts-3-20131003/#at-font-feature-values-rule
+ */
+class FontFeatureValueAtRuleSanitizer extends RuleSanitizer {
+
+       /** @var string */
+       protected $name;
+
+       /** @var Matcher */
+       protected $valueMatcher;
+
+       /**
+        * @param string $name
+        * @param Matcher $valueMatcher
+        */
+       public function __construct( $name, Matcher $valueMatcher ) {
+               $this->name = $name;
+               $this->valueMatcher = $valueMatcher;
+       }
+
+       public function handlesRule( Rule $rule ) {
+               return $rule instanceof AtRule && !strcasecmp( $rule->getName(), $this->name );
+       }
+
+       protected function doSanitize( CSSObject $object ) {
+               if ( !$object instanceof Rule || !$this->handlesRule( $object ) ) {
+                       $this->sanitizationError( 'expected-at-rule', $object, [ $this->name ] );
+                       return null;
+               }
+
+               if ( $object->getBlock() === null ) {
+                       $this->sanitizationError( 'at-rule-block-required', $object, [ $this->name ] );
+                       return null;
+               }
+
+               // No non-whitespace prelude allowed
+               if ( Util::findFirstNonWhitespace( $object->getPrelude() ) ) {
+                       $this->sanitizationError( 'invalid-font-feature-value', $object, [ $this->name ] );
+                       return null;
+               }
+
+               $ret = clone( $object );
+               $this->fixPreludeWhitespace( $ret, false );
+
+               // Parse the block's contents into a list of declarations, sanitize it,
+               // and put it back into the block.
+               $blockContents = $ret->getBlock()->getValue();
+               $parser = Parser::newFromTokens( $blockContents->toTokenArray() );
+               $oldDeclarations = $parser->parseDeclarationList();
+               $this->sanitizationErrors = array_merge( $this->sanitizationErrors, $parser->getParseErrors() );
+               $newDeclarations = new DeclarationList();
+               foreach ( $oldDeclarations as $declaration ) {
+                       if ( $this->valueMatcher->match( $declaration->getValue(), [ 'mark-significance' => true ] ) ) {
+                               $newDeclarations->add( $declaration );
+                       } else {
+                               $this->sanitizationError( 'invalid-font-feature-value-declaration', $declaration,
+                                       [ $this->name ] );
+                       }
+               }
+               $blockContents->clear();
+               $blockContents->add( $newDeclarations->toComponentValueArray() );
+
+               return $ret;
+       }
+}