/**
* Invoke the ViewHelper described by the ViewHelperNode, the properties
* of which will already have been filled by the ViewHelperResolver.
*
* @param string|ViewHelperInterface $viewHelperClassName
* @param array $arguments
* @param RenderingContextInterface $renderingContext
* @param \Closure $renderChildrenClosure
* @return mixed
*/
public function invoke($viewHelperClassNameOrInstance, array $arguments, RenderingContextInterface $renderingContext, \Closure $renderChildrenClosure = NULL)
{
if ($viewHelperClassNameOrInstance instanceof ViewHelperInterface) {
$viewHelper = $viewHelperClassNameOrInstance;
} else {
$viewHelper = $this->viewHelperResolver->createViewHelperInstanceFromClassName($viewHelperClassNameOrInstance);
}
$expectedViewHelperArguments = $renderingContext->getViewHelperResolver()->getArgumentDefinitionsForViewHelper($viewHelper);
// Rendering process
$evaluatedArguments = array();
foreach ($expectedViewHelperArguments as $argumentName => $argumentDefinition) {
if (isset($arguments[$argumentName])) {
/** @var NodeInterface|mixed $argumentValue */
$argumentValue = $arguments[$argumentName];
$evaluatedArguments[$argumentName] = $argumentValue instanceof NodeInterface ? $argumentValue->evaluate($renderingContext) : $argumentValue;
} else {
$evaluatedArguments[$argumentName] = $argumentDefinition->getDefaultValue();
}
}
$this->abortIfUnregisteredArgumentsExist($expectedViewHelperArguments, $evaluatedArguments);
$this->abortIfRequiredArgumentsAreMissing($expectedViewHelperArguments, $evaluatedArguments);
$viewHelper->setArguments($evaluatedArguments);
$viewHelper->setRenderingContext($renderingContext);
if ($renderChildrenClosure) {
$viewHelper->setRenderChildrenClosure($renderChildrenClosure);
}
return $viewHelper->initializeArgumentsAndRender();
}
/**
* Public such that it is callable from within closures
*
* @param integer $uniqueCounter
* @param RenderingContextInterface $renderingContext
* @param string $viewHelperName
* @return AbstractViewHelper
*/
public function getViewHelper($uniqueCounter, RenderingContextInterface $renderingContext, $viewHelperName)
{
return $renderingContext->getViewHelperResolver()->createViewHelperInstanceFromClassName($viewHelperName);
}
