/** * 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; }
/** * The compiled ViewHelper adds two new ViewHelper arguments: __thenClosure and __elseClosure. * These contain closures which are be executed to render the then(), respectively else() case. * * @param string $argumentsName * @param string $closureName * @param string $initializationPhpCode * @param ViewHelperNode $node * @param TemplateCompiler $compiler * @return string */ public function compile($argumentsName, $closureName, &$initializationPhpCode, ViewHelperNode $node, TemplateCompiler $compiler) { $thenViewHelperEncountered = $elseViewHelperEncountered = FALSE; foreach ($node->getChildNodes() as $childNode) { if ($childNode instanceof ViewHelperNode) { $viewHelperClassName = $childNode->getViewHelperClassName(); if (substr($viewHelperClassName, -14) === 'ThenViewHelper') { $thenViewHelperEncountered = TRUE; $childNodesAsClosure = $compiler->wrapChildNodesInClosure($childNode); $initializationPhpCode .= sprintf('%s[\'__thenClosure\'] = %s;', $argumentsName, $childNodesAsClosure) . chr(10); } elseif (substr($viewHelperClassName, -14) === 'ElseViewHelper') { $elseViewHelperEncountered = TRUE; $childNodesAsClosure = $compiler->wrapChildNodesInClosure($childNode); $initializationPhpCode .= sprintf('%s[\'__elseClosures\'][] = %s;', $argumentsName, $childNodesAsClosure) . chr(10); $arguments = $childNode->getArguments(); if (isset($arguments['if'])) { // The "else" has an argument, indicating it has a secondary (elseif) condition. // Compile a closure which will evaluate the condition. $elseIfConditionAsClosure = $compiler->wrapViewHelperNodeArgumentEvaluationInClosure($childNode, 'if'); $initializationPhpCode .= sprintf('%s[\'__elseifClosures\'][] = %s;', $argumentsName, $elseIfConditionAsClosure) . chr(10); } } } } if (!$thenViewHelperEncountered && !$elseViewHelperEncountered && !isset($node->getArguments()['then'])) { $initializationPhpCode .= sprintf('%s[\'__thenClosure\'] = %s;', $argumentsName, $closureName) . chr(10); } return parent::compile($argumentsName, $closureName, $initializationPhpCode, $node, $compiler); }