Adds remembering of active admin tab on page reload.

amd/src/admintabs.js

@@ -0,0 +1,67 @@
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * Theme Boost Union - JS code current admin tab selector
+ *
+ * @module     theme_boost_union/admintab
+ * @copyright  2023 Mario Wehr <[email protected]>
+ * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
+
+define(['jquery'], function($) {
+    "use strict";
+
+    /**
+     * Initialising.
+     */
+    function initAdminTabs() {
+        // Wait for bootstrap
+        whenBootstrapAvailable(() => {
+            const sessionKey = "boost_union_active_admin_tab";
+            // Register for all boost union tabs
+            $('a[href^="#theme_boost_union_"]').parent().on("shown.bs.tab", function() {
+                // Store active tab in session
+                sessionStorage.setItem(sessionKey, $(this).children("a").eq(0).attr("href"));
+            });
+            // Get active tab from session
+            const activeTab = sessionStorage.getItem(sessionKey);
+            if (activeTab) {
+                // Show active tab from session
+                $('a[href="' + activeTab + '"]').tab("show");
+            }
+        });
+    }
+
+    /**
+     * Wait for Bootstrap is finally loaded
+     * @param {function} callback
+     */
+    function whenBootstrapAvailable(callback) {
+        window.setTimeout(() => {
+            if (typeof $().tab == "function") {
+                callback();
+            } else {
+                whenBootstrapAvailable(callback);
+            }
+        }, 100);
+    }
+
+    return {
+        init: function() {
+            initAdminTabs();
+        }
+    };
+});

settings.php

@@ -28,6 +28,7 @@
 defined('MOODLE_INTERNAL') || die();
 
 if ($hassiteconfig || has_capability('theme/boost_union:configure', context_system::instance())) {
+    global $PAGE;
 
     // How this file works:
     // This theme's settings are divided into multiple settings pages.
@@ -44,6 +45,9 @@
     // Avoid that the theme settings page is auto-created.
     $settings = null;
 
+    // Load admin tab remember js
+    $PAGE->requires->js_call_amd('theme_boost_union/admintabs', 'init');
+
     // Create custom admin settings category.
     $ADMIN->add('themes', new admin_category('theme_boost_union',
             get_string('pluginname', 'theme_boost_union', null, true)));