+ } elseif ( $this->reader->namespaceURI == self::NS_SVG
+ && $this->reader->nodeType == XMLReader::ELEMENT
+ ) {
+ $sysLang = $this->reader->getAttribute( 'systemLanguage' );
+ if ( !is_null( $sysLang ) && $sysLang !== '' ) {
+ // See https://www.w3.org/TR/SVG/struct.html#SystemLanguageAttribute
+ $langList = explode( ',', $sysLang );
+ foreach ( $langList as $langItem ) {
+ $langItem = trim( $langItem );
+ if ( Language::isWellFormedLanguageTag( $langItem ) ) {
+ $this->languages[$langItem] = self::LANG_FULL_MATCH;
+ }
+ // Note, the standard says that any prefix should work,
+ // here we do only the initial prefix, since that will catch
+ // 99% of cases, and we are going to compare against fallbacks.
+ // This differs mildly from how the spec says languages should be
+ // handled, however it matches better how the MediaWiki language
+ // preference is generally handled.
+ $dash = strpos( $langItem, '-' );
+ // Intentionally checking both !false and > 0 at the same time.
+ if ( $dash ) {
+ $itemPrefix = substr( $langItem, 0, $dash );
+ if ( Language::isWellFormedLanguageTag( $itemPrefix ) ) {
+ $this->languagePrefixes[$itemPrefix] = self::LANG_PREFIX_MATCH;
+ }
+ }
+ }
+ }
+ switch ( $this->reader->localName ) {
+ case 'script':
+ // Normally we disallow files with
+ // <script>, but its possible
+ // to configure MW to disable
+ // such checks.