parentExtTag(); if ( $parentExtTag === 'ref' && empty( $extApi->parentExtTagOpts()['allowNestedRef'] ) ) { return null; } // The one supported case for nested refs is from the {{#tag:ref}} parser // function. However, we're overly permissive here since we can't // distinguish when that's nested in another template. // The php preprocessor did our expansion. $allowNestedRef = !empty( $extApi->inTemplate() ) && $parentExtTag !== 'ref'; return $extApi->extTagToDOM( $extArgs, '', $txt, [ // NOTE: sup's content model requires it only contain phrasing // content, not flow content. However, since we are building an // in-memory DOM which is simply a tree data structure, we can // nest flow content in a ^{tag.
'wrapperTag' => 'sup',
'parseOpts' => [
'extTag' => 'ref',
'extTagOpts' => [ 'allowNestedRef' => $allowNestedRef ],
// Ref content doesn't need p-wrapping or indent-pres.
// Treat this as inline-context content to get that b/c behavior.
'context' => 'inline',
],
]
);
}

/** @inheritDoc */
public function lintHandler(
ParsoidExtensionAPI $extApi, DOMElement $ref, callable $defaultHandler
): ?DOMNode {
// Don't lint the content of ref in ref, since it can lead to cycles
// using named refs
if ( WTUtils::fromExtensionContent( $ref, 'references' ) ) {
return $ref->nextSibling;
}
// Ignore content from reference errors
if ( DOMUtils::hasTypeOf( $ref, 'mw:Error' ) ) {
return $ref->nextSibling;
}
$refFirstChild = $ref->firstChild;
DOMUtils::assertElt( $refFirstChild );
$linkBackId = preg_replace( '/[^#]*#/', '', $refFirstChild->getAttribute( 'href' ), 1 );
$refNode = $ref->ownerDocument->getElementById( $linkBackId );
if ( $refNode ) {
// Ex: Buggy input wikitext without ref content
$defaultHandler( $refNode->lastChild );
}
return $ref->nextSibling;
}

/** @inheritDoc */
public function domToWikitext(
ParsoidExtensionAPI $extApi, DOMElement $node, bool $wrapperUnmodified
) {
$startTagSrc = $extApi->extStartTagToWikitext( $node );
$dataMw = DOMDataUtils::getDataMw( $node );
$html = null;
if ( !isset( $dataMw->body ) ) {
return $startTagSrc; // We self-closed this already.
}

$html2wtOpts = [
'extName' => $dataMw->name,
// FIXME: One-off PHP parser state leak. This needs a better solution.
'inPHPBlock' => true
];

if ( is_string( $dataMw->body->html ?? null ) ) {
// First look for the extension's content in data-mw.body.html
$src = $extApi->htmlToWikitext( $html2wtOpts, $dataMw->body->html );
} elseif ( is_string( $dataMw->body->id ?? null ) ) {
// If the body isn't contained in data-mw.body.html, look if
// there's an element pointed to by body.id.
$bodyElt = DOMCompat::getElementById( $node->ownerDocument, $dataMw->body->id );
$editedDoc = $extApi->getPageConfig()->editedDoc ?? null;
if ( !$bodyElt && $editedDoc ) {
// Try to get to it from the top-level page.
// This can happen when the is inside another extension,
// most commonly inside .
// The recursive call to serializeDOM puts us inside a new document.
$bodyElt = DOMCompat::getElementById( $editedDoc, $dataMw->body->id );
}

// If we couldn't find a body element, this is a bug.
// Add some extra debugging for the editing client (ex: VisualEditor)
if ( !$bodyElt ) {
$extraDebug = '';
$firstA = DOMCompat::querySelector( $node, 'a[href]' );
$href = $firstA->getAttribute( 'href' );
if ( $firstA && preg_match( '/^#/', $href ) ) {
try {
$ref = DOMCompat::querySelector( $node->ownerDocument, $href );
if ( $ref ) {
$extraDebug .= ' [own doc: ' . DOMCompat::getOuterHTML( $ref ) . ']';
}
$ref = DOMCompat::querySelector( $editedDoc, $href );
if ( $ref ) {
$extraDebug .= ' [main doc: ' . DOMCompat::getOuterHTML( $ref ) . ']';
}
} catch ( Exception $e ) {
// We are just providing VE with debugging info.
// So, ignore all exceptions / errors in this code.
}

if ( !$extraDebug ) {
$extraDebug = ' [reference ' . $href . ' not found]';
}
}
$extApi->log(
'error/' . $dataMw->name,
'extension src id ' . $dataMw->body->id . ' points to non-existent element for:',
DOMCompat::getOuterHTML( $node ),
'. More debug info: ',
$extraDebug
);
return ''; // Drop it!
}

$src = $extApi->domToWikitext( $html2wtOpts, $bodyElt, true );
} else {
$extApi->log( 'error', 'Ref body unavailable for: ' . DOMCompat::getOuterHTML( $node ) );
return ''; // Drop it!
}

return $startTagSrc . $src . 'name . '>';
}
}}