BeforePagePreviewUriGeneratedEvent¶

New in version 12.0

This PSR-14 event replaces the $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_befunc.php']['viewOnClickClass'] preProcess hook.

The \TYPO3\CMS\Backend\Routing\Event\BeforePagePreviewUriGeneratedEvent is executed in \TYPO3\CMS\Backend\Routing->buildUri(), before the preview URI is actually built. It allows to either adjust the parameters, such as the page id or the language id, or to set a custom preview URI, which will then stop the event propagation and also prevents \TYPO3\CMS\Backend\Routing\PreviewUriBuilder from building the URI based on the parameters.

Note

The overwritten parameters are used for building the URI and are also passed to the AfterPagePreviewUriGeneratedEvent. They however do not overwrite the related class properties in PreviewUriBuilder.

Example¶

Registration of the event listener in the extension's Services.yaml:

EXT:my_extension/Configuration/Services.yaml

services:
  # Place here the default dependency injection configuration

  MyVendor\MyExtension\Backend\EventListener\MyEventListener:
    tags:
      - name: event.listener
        identifier: 'my-extension/backend/modify-parameters'

Read how to configure dependency injection in extensions.

The corresponding event listener class:

EXT:my_extension/Classes/Backend/EventListener/MyEventListener.php

<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\Backend\EventListener;

use TYPO3\CMS\Backend\Routing\Event\BeforePagePreviewUriGeneratedEvent;

final class MyEventListener
{
    public function __invoke(BeforePagePreviewUriGeneratedEvent $event): void
    {
        // Add custom query parameter before URI generation
        $event->setAdditionalQueryParameters(
            array_replace_recursive(
                $event->getAdditionalQueryParameters(),
                ['myParam' => 'paramValue'],
            ),
        );
    }
}

API¶

class BeforePagePreviewUriGeneratedEvent ¶

Fully qualified name: \TYPO3\CMS\Backend\Routing\Event\BeforePagePreviewUriGeneratedEvent

Listeners to this event will be able to modify the corresponding parameters, before the page preview URI is being generated, when linking to a page in the frontend.

setPreviewUri ( \Psr\Http\Message\UriInterface $uri) ¶

param $uri: the uri

getPreviewUri ( ) ¶

Returns: ?\Psr\Http\Message\UriInterface

isPropagationStopped ( ) ¶

Returns: bool

getPageId ( ) ¶

Returns: int

setPageId ( int $pageId) ¶

param $pageId: the pageId

getLanguageId ( ) ¶

Returns: int

setLanguageId ( int $languageId) ¶

param $languageId: the languageId

getRootline ( ) ¶

Returns: array

setRootline ( array $rootline) ¶

param $rootline: the rootline

getSection ( ) ¶

Returns: string

setSection ( string $section) ¶

param $section: the section

getAdditionalQueryParameters ( ) ¶

Returns: array

setAdditionalQueryParameters ( array $additionalQueryParameters) ¶

param $additionalQueryParameters: the additionalQueryParameters

getContext ( ) ¶

Returns: \TYPO3\CMS\Core\Context\Context

getOptions ( ) ¶

Returns: array