Feature: #111159 - Add a rendering event for f:render.text 

Description 

The PSR-14 event BeforeRenderTextEvent allows extensions to take over rendering of <f:render.text> , for example to provide inline editing controls without overriding the ViewHelper.

The event is dispatched after resolving and validating the record, string value, and supported field schema, before escaping or rich-text processing. It exposes the record, database table, full type, field name and schema, original value, and optional request. Page information objects are resolved to Record API objects before dispatching.

A listener can supply a complete result through setRenderedText(UnsafeHTML $renderedText) . This stops propagation to later listeners and skips default rendering. The result object is returned unchanged, preserving any additional metadata it provides. An empty new UnsafeHTMLString('') also counts as a replacement. The listener is responsible for appropriate escaping or sanitization of its HTML.

If no listener supplies a result, existing rendering remains unchanged. Missing optional fields return null without dispatching the event. Invalid records, non-string values, and unsupported field types retain their existing exception behavior.

Example:

use TYPO3\CMS\Core\Attribute\AsEventListener;
use TYPO3\CMS\Core\Schema\Field\InputFieldType;
use TYPO3\CMS\Fluid\Event\BeforeRenderTextEvent;
use TYPO3Fluid\Fluid\Core\Parser\UnsafeHTMLString;

#[AsEventListener(identifier: 'my-extension/render-text')]
final class RenderTextListener
{
    public function __invoke(BeforeRenderTextEvent $event): void
    {
        if (
            !$event->getFieldSchema() instanceof InputFieldType
            || !$event->getRequest()?->getAttribute('my_extension.edit_mode')
        ) {
            return;
        }

        $event->setRenderedText(new UnsafeHTMLString(
            '<span class="editable">'
            . htmlspecialchars($event->getValue())
            . '</span>'
        ));
    }
}

Impact 

Extensions can replace text rendering through an event listener while preserving the default behavior for fields or requests they do not handle.