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CustomViewHelperResolver.php
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CustomViewHelperResolver.php
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<?php
/*
* This file belongs to the package "TYPO3 Fluid".
* See LICENSE.txt that was shipped with this package.
*/
namespace TYPO3Fluid\FluidExamples;
use TYPO3Fluid\Fluid\Core\ViewHelper\ArgumentDefinition;
use TYPO3Fluid\Fluid\Core\ViewHelper\ViewHelperInterface;
use TYPO3Fluid\Fluid\Core\ViewHelper\ViewHelperResolver;
use TYPO3Fluid\FluidExamples\ViewHelper\CustomViewHelper;
/**
* Class MyCustomViewHelperResolver
*
* Custom ViewHelperResolver which is capable of
* changing a wide array of details about how a
* template gets parsed.
*/
class CustomViewHelperResolver extends ViewHelperResolver
{
/**
* Returns the built-in set of ViewHelper classes with
* one addition, `f:myLink` which is redirected to anoter
* class.
*
* @param string $namespaceIdentifier
* @param string $methodIdentifier
* @return string
*/
public function resolveViewHelperClassName($namespaceIdentifier, $methodIdentifier)
{
if ($namespaceIdentifier === 'f' && $methodIdentifier === 'myLink') {
return CustomViewHelper::class;
}
return parent::resolveViewHelperClassName($namespaceIdentifier, $methodIdentifier);
}
/**
* Asks the ViewHelper for argument definitions and adds
* a case which matches our custom ViewHelper in order to
* manipulate its argument definitions.
*
* @param ViewHelperInterface $viewHelper
* @return ArgumentDefinition[]
*/
public function getArgumentDefinitionsForViewHelper(ViewHelperInterface $viewHelper)
{
$arguments = parent::getArgumentDefinitionsForViewHelper($viewHelper);
if ($viewHelper instanceof CustomViewHelper) {
$arguments['page'] = new ArgumentDefinition(
'page',
'array', // our argument must now be an array
'This is our new description for the argument',
false, // argument is no longer mandatory
['foo' => 'bar'], // our argument has a new default value if argument is not provided
);
}
return $arguments;
}
}