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31 lines
850 B
31 lines
850 B
<?php
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/** @license MIT
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* Copyright 2017 , Dustin Wilson, J. King et al.
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* See LICENSE and AUTHORS files for details */
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declare(strict_types=1);
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namespace MensBeam\HTML\DOM;
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trait Walk {
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/** Generator which walks down the DOM. Nonstandard. */
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public function walk(?\Closure $filter = null): \Generator {
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return $this->walkGenerator($this, $filter);
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}
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private function walkGenerator(\DOMNode $node, ?\Closure $filter = null) {
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if ($filter === null || $filter($node)) {
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yield $node;
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}
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if ($node instanceof TemplateElement) {
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$node = $node->content;
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}
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if ($node->hasChildNodes()) {
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$children = $node->childNodes;
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foreach ($children as $c) {
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yield from $this->walkGenerator($c, $filter);
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}
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}
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}
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}
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