From db46bfc03f3a22752ef6bd91ae577d893872a216 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 24 Jun 2023 14:44:40 +0200
Subject: Merging upstream version 5.3.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 js/src/dom/selector-engine.js | 53 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 48 insertions(+), 5 deletions(-)

(limited to 'js/src/dom/selector-engine.js')

diff --git a/js/src/dom/selector-engine.js b/js/src/dom/selector-engine.js
index 1ba104f..3cecf6f 100644
--- a/js/src/dom/selector-engine.js
+++ b/js/src/dom/selector-engine.js
@@ -1,15 +1,36 @@
 /**
  * --------------------------------------------------------------------------
- * Bootstrap (v5.2.3): dom/selector-engine.js
+ * Bootstrap dom/selector-engine.js
  * Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
  * --------------------------------------------------------------------------
  */
 
-import { isDisabled, isVisible } from '../util/index'
+import { isDisabled, isVisible, parseSelector } from '../util/index.js'
 
-/**
- * Constants
- */
+const getSelector = element => {
+  let selector = element.getAttribute('data-bs-target')
+
+  if (!selector || selector === '#') {
+    let hrefAttribute = element.getAttribute('href')
+
+    // The only valid content that could double as a selector are IDs or classes,
+    // so everything starting with `#` or `.`. If a "real" URL is used as the selector,
+    // `document.querySelector` will rightfully complain it is invalid.
+    // See https://github.com/twbs/bootstrap/issues/32273
+    if (!hrefAttribute || (!hrefAttribute.includes('#') && !hrefAttribute.startsWith('.'))) {
+      return null
+    }
+
+    // Just in case some CMS puts out a full URL with the anchor appended
+    if (hrefAttribute.includes('#') && !hrefAttribute.startsWith('#')) {
+      hrefAttribute = `#${hrefAttribute.split('#')[1]}`
+    }
+
+    selector = hrefAttribute && hrefAttribute !== '#' ? hrefAttribute.trim() : null
+  }
+
+  return parseSelector(selector)
+}
 
 const SelectorEngine = {
   find(selector, element = document.documentElement) {
@@ -77,6 +98,28 @@ const SelectorEngine = {
     ].map(selector => `${selector}:not([tabindex^="-"])`).join(',')
 
     return this.find(focusables, element).filter(el => !isDisabled(el) && isVisible(el))
+  },
+
+  getSelectorFromElement(element) {
+    const selector = getSelector(element)
+
+    if (selector) {
+      return SelectorEngine.findOne(selector) ? selector : null
+    }
+
+    return null
+  },
+
+  getElementFromSelector(element) {
+    const selector = getSelector(element)
+
+    return selector ? SelectorEngine.findOne(selector) : null
+  },
+
+  getMultipleElementsFromSelector(element) {
+    const selector = getSelector(element)
+
+    return selector ? SelectorEngine.find(selector) : []
   }
 }
 
-- 
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