/**
* Call the view helper associated with this object.
*
* First, it evaluates the arguments of the view helper.
*
* If the view helper implements Tx_Fluid_Core_ViewHelper_Facets_ChildNodeAccessInterface,
* it calls setChildNodes(array childNodes) on the view helper.
*
* Afterwards, checks that the view helper did not leave a variable lying around.
*
* @param Tx_Fluid_Core_Rendering_RenderingContextInterface $renderingContext
* @return object evaluated node after the view helper has been called.
* @author Sebastian Kurfürst <*****@*****.**>
* @author Karsten Dambekalns <*****@*****.**>
* @todo check recreation of viewhelper when revisiting caching
*/
public function evaluate(Tx_Fluid_Core_Rendering_RenderingContextInterface $renderingContext)
{
$objectManager = $renderingContext->getObjectManager();
$contextVariables = $renderingContext->getTemplateVariableContainer()->getAllIdentifiers();
if ($this->viewHelpersByContext->contains($renderingContext)) {
$viewHelper = $this->viewHelpersByContext[$renderingContext];
} else {
$viewHelper = clone $this->uninitializedViewHelper;
$this->viewHelpersByContext->attach($renderingContext, $viewHelper);
}
$evaluatedArguments = array();
$renderMethodParameters = array();
if (count($viewHelper->prepareArguments())) {
foreach ($viewHelper->prepareArguments() as $argumentName => $argumentDefinition) {
if (isset($this->arguments[$argumentName])) {
$argumentValue = $this->arguments[$argumentName];
$evaluatedArguments[$argumentName] = $this->convertArgumentValue($argumentValue, $argumentDefinition->getType(), $renderingContext);
} else {
$evaluatedArguments[$argumentName] = $argumentDefinition->getDefaultValue();
}
if ($argumentDefinition->isMethodParameter()) {
$renderMethodParameters[$argumentName] = $evaluatedArguments[$argumentName];
}
}
}
$viewHelperArguments = $objectManager->create('Tx_Fluid_Core_ViewHelper_Arguments', $evaluatedArguments);
$viewHelper->setArguments($viewHelperArguments);
$viewHelper->setTemplateVariableContainer($renderingContext->getTemplateVariableContainer());
if ($renderingContext->getControllerContext() !== NULL) {
$viewHelper->setControllerContext($renderingContext->getControllerContext());
}
$viewHelper->setViewHelperVariableContainer($renderingContext->getViewHelperVariableContainer());
$viewHelper->setViewHelperNode($this);
$viewHelper->setRenderingContext($renderingContext);
if ($viewHelper instanceof Tx_Fluid_Core_ViewHelper_Facets_ChildNodeAccessInterface) {
$viewHelper->setChildNodes($this->childNodes);
}
$output = $viewHelper->initializeArgumentsAndRender($renderMethodParameters);
return $output;
}
