1 files changed, 54 insertions, 0 deletions
diff --git a/helpcontent2/help3xsl/a11y-toggle.js b/helpcontent2/help3xsl/a11y-toggle.js
new file mode 100644
index 0000000000..62e1032b02
--- /dev/null
+++ b/helpcontent2/help3xsl/a11y-toggle.js
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+function hideNavs() {
+    let navs = document.querySelectorAll('[data-a11y-toggle] + nav');
+    navs.forEach((nav) => {
+        if (!nav.hasAttribute('hidden')) {
+            nav.previousElementSibling.setAttribute('aria-expanded', 'false');
+            nav.setAttribute('hidden', 'true');
+        }
+    });
+}
+const navToggle = document.querySelectorAll('[data-a11y-toggle]');
+navToggle.forEach((toggle) => {
+      let navList = toggle.nextElementSibling;
+      let navLinks = navList.querySelectorAll('a');
+      toggle.addEventListener('click', (event) => {
+          if (navList.hasAttribute('hidden')) {
+              toggle.setAttribute('aria-expanded', 'true');
+              navList.removeAttribute('hidden');
+              // Set focus on first link
+              // will be highlighted for keyboard users
+              navLinks[0].focus();
+          } else {
+              navList.setAttribute('hidden', 'true');
+              toggle.setAttribute('aria-expanded', 'false');
+          }
+          event.stopPropagation();
+    }, false);
+});
+document.addEventListener('keydown', (event) => {
+    // Ignore IME composition
+    if (event.isComposing || event.keyCode === 229) {
+        return;
+    }
+
+    // Close menu with ESC key
+    if (event.keyCode === 27) {
+        hideNavs();
+    }
+}, false);
+document.addEventListener('click', (event) => {
+    // close navigation menus when clicking anywhere (except when on mobile)
+    if (event.target.closest('[data-a11y-toggle] + nav') || Math.max(document.documentElement.clientWidth, window.innerWidth || 0) < 960) return
+    hideNavs();
+})
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */