/** * 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); }
/** * @param string $argumentsName * @param string $closureName * @param string $initializationPhpCode * @param ViewHelperNode $node * @param TemplateCompiler $compiler */ public function compile($argumentsName, $closureName, &$initializationPhpCode, ViewHelperNode $node, TemplateCompiler $compiler) { if (count($node->getChildNodes())) { throw new StopCompilingException(); } }
/** * Compiles the node structure to a native switch * statement which evaluates closures for each * case comparison and renders child node closures * only when value matches. * * @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) { $phpCode = 'call_user_func_array(function($arguments) use ($renderingContext, $self) {' . PHP_EOL . 'switch ($arguments[\'expression\']) {' . PHP_EOL; foreach ($node->getChildNodes() as $childNode) { if ($this->isDefaultCaseNode($childNode)) { $childrenClosure = $compiler->wrapChildNodesInClosure($childNode); $phpCode .= sprintf('default: return call_user_func(%s);', $childrenClosure) . PHP_EOL; } elseif ($this->isCaseNode($childNode)) { /** @var ViewHelperNode $childNode */ $valueClosure = $compiler->wrapViewHelperNodeArgumentEvaluationInClosure($childNode, 'value'); $childrenClosure = $compiler->wrapChildNodesInClosure($childNode); $phpCode .= sprintf('case call_user_func(%s): return call_user_func(%s);', $valueClosure, $childrenClosure, $compiler->getNodeConverter()->convert($childNode)) . PHP_EOL; } } $phpCode .= '}' . PHP_EOL; $phpCode .= sprintf('}, array(%s))', $argumentsName); return $phpCode; }