/**
* Convert a single ViewHelperNode into its cached representation. If the ViewHelper implements the "Compilable" facet,
* the ViewHelper itself is asked for its cached PHP code representation. If not, a ViewHelper is built and then invoked.
*
* @param \TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\ViewHelperNode $node
* @return array
* @see convert()
*/
protected function convertViewHelperNode(\TYPO3\CMS\Fluid\Core\Parser\SyntaxTree\ViewHelperNode $node)
{
$initializationPhpCode = '// Rendering ViewHelper ' . $node->getViewHelperClassName() . chr(10);
// Build up $arguments array
$argumentsVariableName = $this->variableName('arguments');
$initializationPhpCode .= sprintf('%s = array();', $argumentsVariableName) . chr(10);
$alreadyBuiltArguments = array();
foreach ($node->getArguments() as $argumentName => $argumentValue) {
$converted = $this->convert($argumentValue);
$initializationPhpCode .= $converted['initialization'];
$initializationPhpCode .= sprintf('%s[\'%s\'] = %s;', $argumentsVariableName, $argumentName, $converted['execution']) . chr(10);
$alreadyBuiltArguments[$argumentName] = TRUE;
}
foreach ($node->getUninitializedViewHelper()->prepareArguments() as $argumentName => $argumentDefinition) {
if (!isset($alreadyBuiltArguments[$argumentName])) {
$initializationPhpCode .= sprintf('%s[\'%s\'] = %s;', $argumentsVariableName, $argumentName, var_export($argumentDefinition->getDefaultValue(), TRUE)) . chr(10);
}
}
// Build up closure which renders the child nodes
$renderChildrenClosureVariableName = $this->variableName('renderChildrenClosure');
$initializationPhpCode .= sprintf('%s = %s;', $renderChildrenClosureVariableName, $this->wrapChildNodesInClosure($node)) . chr(10);
if ($node->getUninitializedViewHelper() instanceof \TYPO3\CMS\Fluid\Core\ViewHelper\Facets\CompilableInterface) {
// ViewHelper is compilable
$viewHelperInitializationPhpCode = '';
$convertedViewHelperExecutionCode = $node->getUninitializedViewHelper()->compile($argumentsVariableName, $renderChildrenClosureVariableName, $viewHelperInitializationPhpCode, $node, $this);
$initializationPhpCode .= $viewHelperInitializationPhpCode;
if ($convertedViewHelperExecutionCode !== self::SHOULD_GENERATE_VIEWHELPER_INVOCATION) {
return array('initialization' => $initializationPhpCode, 'execution' => $convertedViewHelperExecutionCode);
}
}
// ViewHelper is not compilable, so we need to instanciate it directly and render it.
$viewHelperVariableName = $this->variableName('viewHelper');
$initializationPhpCode .= sprintf('%s = $self->getViewHelper(\'%s\', $renderingContext, \'%s\');', $viewHelperVariableName, $viewHelperVariableName, $node->getViewHelperClassName()) . chr(10);
$initializationPhpCode .= sprintf('%s->setArguments(%s);', $viewHelperVariableName, $argumentsVariableName) . chr(10);
$initializationPhpCode .= sprintf('%s->setRenderingContext($renderingContext);', $viewHelperVariableName) . chr(10);
$initializationPhpCode .= sprintf('%s->setRenderChildrenClosure(%s);', $viewHelperVariableName, $renderChildrenClosureVariableName) . chr(10);
$initializationPhpCode .= '// End of ViewHelper ' . $node->getViewHelperClassName() . chr(10);
return array('initialization' => $initializationPhpCode, 'execution' => sprintf('%s->initializeArgumentsAndRender()', $viewHelperVariableName));
}
