/**
* 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 ViewHelperNode $node
* @return array
* @see convert()
*/
protected function convertViewHelperNode(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 => $argumentValue) {
if ($argumentValue instanceof NodeInterface) {
$converted = $this->convert($argumentValue);
} else {
$converted = array('initialization' => '', 'execution' => $argumentValue);
}
$initializationPhpCode .= $converted['initialization'];
$initializationPhpCode .= sprintf('%s[\'%s\'] = %s;', $argumentsVariableName, $argumentName, $converted['execution']) . chr(10);
$alreadyBuiltArguments[$argumentName] = TRUE;
}
$arguments = $node->getArgumentDefinitions();
foreach ($arguments 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, $this->templateCompiler->wrapChildNodesInClosure($node)) . chr(10);
$viewHelperInitializationPhpCode = '';
$convertedViewHelperExecutionCode = $node->getUninitializedViewHelper()->compile($argumentsVariableName, $renderChildrenClosureVariableName, $viewHelperInitializationPhpCode, $node, $this->templateCompiler);
$initializationPhpCode .= $viewHelperInitializationPhpCode;
$initializationArray = array('initialization' => $initializationPhpCode, 'execution' => $convertedViewHelperExecutionCode);
return $initializationArray;
}
