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<?php
namespace Gt\Dom;
/**
* A NodeFilter interface represents an object used to filter the nodes in a
* NodeIterator or TreeWalker. A NodeFilter knows nothing about the document or
* traversing nodes; it only knows how to evaluate a single node against the
* provided filter.
*
* Note: The browser doesn't provide any object implementing this interface. It
* is the user who is expected to write one, tailoring the acceptNode() method
* to its needs, and using it with some TreeWalker or NodeIterator objects.
*
* @link https://developer.mozilla.org/en-US/docs/Web/API/NodeFilter
*/
abstract class NodeFilter {
const FILTER_ACCEPT = 1;
const FILTER_REJECT = 2;
const FILTER_SKIP = 3;
const SHOW_ALL = -1;
const SHOW_ELEMENT = 1;
const SHOW_ATTRIBUTE = 2;
const SHOW_TEXT = 4;
const SHOW_PROCESSING_INSTRUCTION = 64;
const SHOW_COMMENT = 128;
const SHOW_DOCUMENT = 256;
const SHOW_DOCUMENT_TYPE = 512;
const SHOW_DOCUMENT_FRAGMENT = 1024;
/**
* The NodeFilter.acceptNode() method returns an unsigned short that
* will be used to tell if a given Node must be accepted or not by the
* NodeIterator or TreeWalker iteration algorithm. This method is
* expected to be written by the user of a NodeFilter.
* Possible return values are:
* NodeFilter.FILTER_ACCEPT
* NodeFilter.FILTER_REJECT
* NodeFilter.FILTER_SKIP
*
* @param Node $node Is a Node being the object to check against the
* filter.
* @return int
* @link https://developer.mozilla.org/en-US/docs/Web/API/NodeFilter/acceptNode
*/
abstract public function acceptNode(Node|Element $node):int;
}