initial

wp-content/plugins/admin-site-enhancements/vendor/enshrined/svg-sanitize/src/Helper.php

@@ -0,0 +1,53 @@
+<?php
+namespace enshrined\svgSanitize;
+
+class Helper
+{
+    /**
+     * @param \DOMElement $element
+     * @return string|null
+     */
+    public static function getElementHref(\DOMElement $element)
+    {
+        if ($element->hasAttribute('href')) {
+            return $element->getAttribute('href');
+        }
+        if ($element->hasAttributeNS('http://www.w3.org/1999/xlink', 'href')) {
+            return $element->getAttributeNS('http://www.w3.org/1999/xlink', 'href');
+        }
+        return null;
+    }
+
+    /**
+     * @param string $href
+     * @return string|null
+     */
+    public static function extractIdReferenceFromHref($href)
+    {
+        if (!is_string($href) || strpos($href, '#') !== 0) {
+            return null;
+        }
+        return substr($href, 1);
+    }
+
+    /**
+     * @param \DOMElement $needle
+     * @param \DOMElement $haystack
+     * @return bool
+     */
+    public static function isElementContainedIn(\DOMElement $needle, \DOMElement $haystack)
+    {
+        if ($needle === $haystack) {
+            return true;
+        }
+        foreach ($haystack->childNodes as $childNode) {
+            if (!$childNode instanceof \DOMElement) {
+                continue;
+            }
+            if (self::isElementContainedIn($needle, $childNode)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}