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wp-content/plugins/mailpoet/lib/Util/DOM.php

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+<?php // phpcs:ignore SlevomatCodingStandard.TypeHints.DeclareStrictTypes.DeclareStrictTypesMissing
+
+namespace MailPoet\Util;
+
+if (!defined('ABSPATH')) exit;
+
+
+use MailPoetVendor\pQuery\DomNode;
+
+class DOM {
+  /**
+   * Splits a DOM tree around the cut element, bringing it up to bound
+   * ancestor and splitting left and right siblings into subtrees along
+   * the way, retaining order and nesting level.
+   */
+  public static function splitOn(DomNode $bound, DomNode $cutElement) {
+    $ignoreTextAndCommentNodes = false;
+    $grandparent = $cutElement->parent;
+    for ($parent = $cutElement->parent; $bound != $parent; $parent = $grandparent) {
+      // Clone parent node without children, but with attributes
+      $parent->after($parent->toString());
+      $right = $parent->getNextSibling($ignoreTextAndCommentNodes);
+      $right->clear();
+
+      while ($sibling = $cutElement->getNextSibling($ignoreTextAndCommentNodes)) {
+        $sibling->move($right);
+      }
+
+      // Reattach cut_element and right siblings to grandparent
+      $grandparent = $parent->parent;
+      $indexAfterParent = $parent->index() + 1;
+      $right->move($grandparent, $indexAfterParent);
+      $indexAfterParent = $parent->index() + 1;
+      $cutElement->move($grandparent, $indexAfterParent);
+    }
+  }
+
+  public static function findTopAncestor(DomNode $item) {
+    while ($item->parent->parent !== null) {
+      $item = $item->parent;
+    }
+    return $item;
+  }
+}