DestructTracer.php
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DestructTracer.php
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	<?php

	namespace Wikimedia\RemexHtml\TreeBuilder;

	use Wikimedia\RemexHtml\Tokenizer\Attributes;

	/**
	* A debugging helper which calls a callback function with a descriptive message
	* each time an Element node is destroyed.
	*/
	class DestructTracer implements TreeHandler {
	private $callback;

	public function __construct( $callback ) {
	$this->callback = $callback;
	}

	public function startDocument( $fragmentNamespace, $fragmentName ) {
	}

	public function endDocument( $pos ) {
	}

	public function characters( $preposition, $ref, $text, $start, $length,
	$sourceStart, $sourceLength
	) {
	}

	public function insertElement( $preposition, $ref, Element $element, $void,
	$sourceStart, $sourceLength
	) {
	$element->userData = new DestructTracerNode( $this->callback, $element->getDebugTag() );
	}

	public function endTag( Element $element, $sourceStart, $sourceLength ) {
	}

	public function doctype( $name, $public, $system, $quirks, $sourceStart, $sourceLength ) {
	}

	public function comment( $preposition, $ref, $text, $sourceStart, $sourceLength ) {
	}

	public function error( $text, $pos ) {
	}

	public function mergeAttributes( Element $element, Attributes $attrs, $sourceStart ) {
	}

	public function removeNode( Element $element, $sourceStart ) {
	}

	public function reparentChildren( Element $element, Element $newParent, $sourceStart ) {
	$newParent->userData = new DestructTracerNode( $this->callback, $newParent->getDebugTag() );
	}
	}