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<?php
/*
* This file belongs to the package "TYPO3 Fluid".
* See LICENSE.txt that was shipped with this package.
*/
namespace TYPO3Fluid\Fluid\ViewHelpers;
use TYPO3Fluid\Fluid\Core\Compiler\TemplateCompiler;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ViewHelperNode;
use TYPO3Fluid\Fluid\Core\Variables\VariableProviderInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
/**
* With this tag, you can select a layout to be used for the current template.
*
* Examples
* ========
*
* ::
*
* <f:layout name="main" />
*
* Output::
*
* (no output)
*
* @api
*/
class LayoutViewHelper extends AbstractViewHelper
{
/**
* Initialize arguments
*
* @api
*/
public function initializeArguments()
{
$this->registerArgument('name', 'string', 'Name of layout to use. If none given, "Default" is used.');
}
public function render()
{
return '';
}
/**
* This VH does not ever output anything as such: Layouts are
* handled differently in the compiler / parser and the f:render
* VH invokes section body execution.
* We optimize compilation to always return an empty here.
*/
final public function convert(TemplateCompiler $templateCompiler): array
{
return [
'initialization' => '',
'execution' => '\'\'',
];
}
/**
* On the post parse event, add the "layoutName" variable to the variable container so it can be used by the TemplateView.
*
* @param ViewHelperNode $node
* @param array $arguments
* @param VariableProviderInterface $variableContainer
*/
public static function postParseEvent(
ViewHelperNode $node,
array $arguments,
VariableProviderInterface $variableContainer
) {
if (isset($arguments['name'])) {
$layoutNameNode = $arguments['name'];
} else {
$layoutNameNode = 'Default';
}
$variableContainer->add('layoutName', $layoutNameNode);
}
}