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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 CMS project.
*
* It is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, either version 2
* of the License, or any later version.
*
* For the full copyright and license information, please read the
* LICENSE.txt file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\CMS\Frontend\Page;
/**
* Finds the proper layout for a page, using the database fields "backend_layout"
* and "backend_layout_next_level".
*
* The most crucial part is that "backend_layout" is only applied for the CURRENT level,
* whereas backend_layout_next_level.
*
* Used in TypoScript as "getData: pagelayout".
*
* @internal as this might get moved to EXT:core if usages in TYPO3 Backend are helpful as well.
*/
class PageLayoutResolver
{
/**
* Check if the current page has a value in the DB field "backend_layout"
* if empty, check the root line for "backend_layout_next_level"
* Same as TypoScript:
* field = backend_layout
* ifEmpty.data = levelfield:-2, backend_layout_next_level, slide
* ifEmpty.ifEmpty = default
*/
public function getLayoutForPage(array $page, array $rootLine): string
{
$selectedLayout = $page['backend_layout'] ?? '';
// If it is set to "none" - don't use any
if ($selectedLayout === '-1') {
return 'none';
}
if ($selectedLayout === '' || $selectedLayout === '0') {
// If it not set check the root-line for a layout on next level and use this
// Remove first element, which is the current page
// See also \TYPO3\CMS\Backend\View\BackendLayoutView::getSelectedCombinedIdentifier()
array_shift($rootLine);
foreach ($rootLine as $rootLinePage) {
$selectedLayout = (string)($rootLinePage['backend_layout_next_level'] ?? '');
// If layout for "next level" is set to "none" - don't use any and stop searching
if ($selectedLayout === '-1') {
$selectedLayout = 'none';
break;
}
if ($selectedLayout !== '' && $selectedLayout !== '0') {
// Stop searching if a layout for "next level" is set
break;
}
}
}
if ($selectedLayout === '0' || $selectedLayout === '') {
$selectedLayout = 'default';
}
return $selectedLayout;
}
}