X-Git-Url: https://scripts.mit.edu/gitweb/autoinstallsdev/mediawiki.git/blobdiff_plain/19e297c21b10b1b8a3acad5e73fc71dcb35db44a..6932310fd58ebef145fa01eb76edf7150284d8ea:/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;
+	}
+}