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<?php
declare(strict_types=1);
/*
* This file is part of the TYPO3 project.
*
* It is free software; you can redistribute it and/or modify it under the terms
* of the MIT License (MIT). For the full copyright and license information,
* please read the LICENSE file that was distributed with this source code.
*
* The TYPO3 project - inspiring people to share!
*/
namespace TYPO3\HtmlSanitizer\Visitor;
use DOMNode;
use TYPO3\HtmlSanitizer\Context;
/**
* Interface for custom node visitors.
*/
interface VisitorInterface
{
/**
* Executed before traversing any nodes
* (e.g. used to initialize visitors)
*
* @param Context $context
*/
public function beforeTraverse(Context $context);
/**
* Executed when entering a node level.
* + returning `null` means "remove node"
* + returning same `DOMNode` means "keep node"
* + returning different `DOMNode` means "replace node"
*
* @param DOMNode $domNode
* @return DOMNode|null
*/
public function enterNode(DOMNode $domNode): ?DOMNode;
/**
* Executed when leaving a node level.
* + returning `null` means "remove node"
* + returning same `DOMNode` means "keep node"
* + returning different `DOMNode` means "replace node"
*
* @param DOMNode $domNode
* @return DOMNode|null
*/
public function leaveNode(DOMNode $domNode): ?DOMNode;
/**
* Executed after having traversed all nodes
* (e.g. used to finalize visitors)
*
* @param Context $context
*/
public function afterTraverse(Context $context);
}