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<?php
/*
* This file belongs to the package "TYPO3 Fluid".
* See LICENSE.txt that was shipped with this package.
*/
namespace TYPO3Fluid\Fluid\Core\Parser\Interceptor;
use TYPO3Fluid\Fluid\Core\Parser\InterceptorInterface;
use TYPO3Fluid\Fluid\Core\Parser\ParsingState;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\EscapingNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\Expression\ExpressionNodeInterface;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\NodeInterface;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ObjectAccessorNode;
use TYPO3Fluid\Fluid\Core\Parser\SyntaxTree\ViewHelperNode;
/**
* An interceptor adding the "Htmlspecialchars" viewhelper to the suitable places.
*/
class Escape implements InterceptorInterface
{
/**
* Is the interceptor enabled right now for child nodes?
*
* @var bool
*/
protected $childrenEscapingEnabled = true;
/**
* A stack of ViewHelperNodes which currently disable the interceptor.
* Needed to enable the interceptor again.
*
* @var NodeInterface[]
*/
protected $viewHelperNodesWhichDisableTheInterceptor = [];
/**
* Adds a ViewHelper node using the Format\HtmlspecialcharsViewHelper to the given node.
* If "escapingInterceptorEnabled" in the ViewHelper is FALSE, will disable itself inside the ViewHelpers body.
*
* @param NodeInterface $node
* @param int $interceptorPosition One of the INTERCEPT_* constants for the current interception point
* @param ParsingState $parsingState the current parsing state. Not needed in this interceptor.
* @return NodeInterface
*/
public function process(NodeInterface $node, $interceptorPosition, ParsingState $parsingState)
{
if ($interceptorPosition === InterceptorInterface::INTERCEPT_OPENING_VIEWHELPER) {
/** @var ViewHelperNode $node */
if (!$node->getUninitializedViewHelper()->isChildrenEscapingEnabled()) {
$this->childrenEscapingEnabled = false;
$this->viewHelperNodesWhichDisableTheInterceptor[] = $node;
}
} elseif ($interceptorPosition === InterceptorInterface::INTERCEPT_CLOSING_VIEWHELPER) {
if (end($this->viewHelperNodesWhichDisableTheInterceptor) === $node) {
array_pop($this->viewHelperNodesWhichDisableTheInterceptor);
if (count($this->viewHelperNodesWhichDisableTheInterceptor) === 0) {
$this->childrenEscapingEnabled = true;
}
}
/** @var ViewHelperNode $node */
if ($this->childrenEscapingEnabled && $node->getUninitializedViewHelper()->isOutputEscapingEnabled()) {
$node = new EscapingNode($node);
}
} elseif ($this->childrenEscapingEnabled && ($node instanceof ObjectAccessorNode || $node instanceof ExpressionNodeInterface)) {
$node = new EscapingNode($node);
}
return $node;
}
/**
* This interceptor wants to hook into object accessor creation, and opening / closing ViewHelpers.
*
* @return array Array of INTERCEPT_* constants
*/
public function getInterceptionPoints()
{
return [
InterceptorInterface::INTERCEPT_OPENING_VIEWHELPER,
InterceptorInterface::INTERCEPT_CLOSING_VIEWHELPER,
InterceptorInterface::INTERCEPT_OBJECTACCESSOR,
InterceptorInterface::INTERCEPT_EXPRESSION,
];
}
}