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Settings Tab Manager (STM)

Provides an API for other userscripts to add tabs to a site's settings menu.

このスクリプトは単体で利用できません。右のようなメタデータを含むスクリプトから、ライブラリとして読み込まれます: // @require https://update.greatest.deepsurf.us/scripts/533630/1575960/Settings%20Tab%20Manager%20%28STM%29.js

このスクリプトの質問や評価の投稿はこちら、通報はこちらへお寄せください。 
  1. // ==UserScript==
  2. // @name         Settings Tab Manager (STM)
  3. // @namespace    shared-settings-manager
  4. // @version      1.1.4d
  5. // @description  Provides an API for userscripts to add tabs to a site's settings menu, with improved state handling.
  6. // @author       Gemini & User Input
  7. // @license      MIT
  8. // @match        https://8chan.moe/*
  9. // @match        https://8chan.se/*
  10. // @grant        GM_addStyle
  11. // @run-at       document-idle
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.     'use strict';
  16.  
  17.     // --- Constants ---
  18.     const MANAGER_ID = 'SettingsTabManager';
  19.     const log = (...args) => console.log(`[${MANAGER_ID}]`, ...args);
  20.     const warn = (...args) => console.warn(`[${MANAGER_ID}]`, ...args);
  21.     const error = (...args) => console.error(`[${MANAGER_ID}]`, ...args);
  22.  
  23.     const SELECTORS = Object.freeze({
  24.         SETTINGS_MENU: '#settingsMenu',
  25.         TAB_CONTAINER: '#settingsMenu .floatingContainer > div:first-child',
  26.         PANEL_CONTAINER: '#settingsMenu .menuContentPanel',
  27.         SITE_TAB: '.settingsTab',
  28.         SITE_PANEL: '.panelContents',
  29.         SITE_SEPARATOR: '.settingsTabSeparator',
  30.     });
  31.     const ACTIVE_CLASSES = Object.freeze({
  32.         TAB: 'selectedTab',
  33.         PANEL: 'selectedPanel',
  34.     });
  35.     const ATTRS = Object.freeze({
  36.         SCRIPT_ID: 'data-stm-script-id',
  37.         MANAGED: 'data-stm-managed',
  38.         SEPARATOR: 'data-stm-main-separator',
  39.         ORDER: 'data-stm-order',
  40.     });
  41.  
  42.     // --- State ---
  43.     let isInitialized = false;
  44.     let settingsMenuEl = null;
  45.     let tabContainerEl = null;
  46.     let panelContainerEl = null;
  47.     let activeStmTabId = null; // Renamed: Tracks the scriptId of the *STM* tab that is active
  48.     const registeredTabs = new Map(); // Stores { scriptId: config }
  49.     const pendingRegistrations = []; // Stores { config } for tabs registered before init
  50.     let isSeparatorAdded = false; // Flag for single separator
  51.  
  52.     // --- Readiness Promise ---
  53.     let resolveReadyPromise;
  54.     const readyPromise = new Promise(resolve => { resolveReadyPromise = resolve; });
  55.  
  56.     // --- Public API Definition ---
  57.     const publicApi = Object.freeze({
  58.         ready: readyPromise,
  59.         registerTab: (config) => registerTabImpl(config),
  60.         activateTab: (scriptId) => activateTabImpl(scriptId),
  61.         getPanelElement: (scriptId) => getPanelElementImpl(scriptId),
  62.         getTabElement: (scriptId) => getTabElementImpl(scriptId)
  63.     });
  64.  
  65.     // --- Styling ---
  66.     GM_addStyle(`
  67.         /* Ensure panels added by STM behave like native ones */
  68.         ${SELECTORS.PANEL_CONTAINER} > div[${ATTRS.MANAGED}] {
  69.             display: none; /* Hide inactive panels */
  70.         }
  71.         ${SELECTORS.PANEL_CONTAINER} > div[${ATTRS.MANAGED}].${ACTIVE_CLASSES.PANEL} {
  72.             display: block; /* Show active panel */
  73.         }
  74.         /* Optional: Basic styling for the added tabs */
  75.         ${SELECTORS.TAB_CONTAINER} > span[${ATTRS.MANAGED}][${ATTRS.SCRIPT_ID}] {
  76.            cursor: pointer;
  77.         }
  78.         /* Styling for the single separator */
  79.         ${SELECTORS.TAB_CONTAINER} > span[${ATTRS.SEPARATOR}] {
  80.             cursor: default;
  81.             margin: 0 5px; /* Add some spacing around the separator */
  82.         }
  83.     `);
  84.  
  85.     // --- Core Logic Implementation Functions ---
  86.  
  87.     /** Finds the essential DOM elements for the settings UI. Returns true if all found. */
  88.     function findSettingsElements() {
  89.         settingsMenuEl = document.querySelector(SELECTORS.SETTINGS_MENU);
  90.         if (!settingsMenuEl) return false;
  91.  
  92.         tabContainerEl = settingsMenuEl.querySelector(SELECTORS.TAB_CONTAINER);
  93.         panelContainerEl = settingsMenuEl.querySelector(SELECTORS.PANEL_CONTAINER);
  94.  
  95.         if (!tabContainerEl) {
  96.             warn('Tab container not found within settings menu using selector:', SELECTORS.TAB_CONTAINER);
  97.             return false;
  98.         }
  99.         if (!panelContainerEl) {
  100.             warn('Panel container not found within settings menu using selector:', SELECTORS.PANEL_CONTAINER);
  101.             return false;
  102.         }
  103.         // Ensure the elements are still in the document (relevant for re-init checks)
  104.         if (!document.body.contains(settingsMenuEl) || !document.body.contains(tabContainerEl) || !document.body.contains(panelContainerEl)) {
  105.              warn('Found settings elements are detached from the DOM.');
  106.              settingsMenuEl = null;
  107.              tabContainerEl = null;
  108.              panelContainerEl = null;
  109.              isSeparatorAdded = false; // Reset separator if containers are gone
  110.              return false;
  111.         }
  112.         return true;
  113.     }
  114.  
  115.     /**
  116.      * Deactivates the STM tab specified by the scriptId.
  117.      * Removes active classes and calls the onDeactivate callback.
  118.      * Does NOT change activeStmTabId itself.
  119.      * @param {string} scriptId The ID of the STM tab to deactivate visuals/callbacks for.
  120.      */
  121.     function _deactivateStmTabVisualsAndCallback(scriptId) {
  122.         if (!scriptId) return; // Nothing to deactivate
  123.  
  124.         const config = registeredTabs.get(scriptId);
  125.         // If config not found, still try to remove visuals defensively but don't warn/error.
  126.  
  127.         const tab = getTabElementImpl(scriptId);
  128.         const panel = getPanelElementImpl(scriptId);
  129.  
  130.         if (tab) tab.classList.remove(ACTIVE_CLASSES.TAB);
  131.         // else { log(`Tab element not found for ${scriptId} during deactivation.`); }
  132.  
  133.         if (panel) {
  134.             panel.classList.remove(ACTIVE_CLASSES.PANEL);
  135.             panel.style.display = 'none';
  136.         }
  137.         // else { log(`Panel element not found for ${scriptId} during deactivation.`); }
  138.  
  139.         // Call the script's deactivate hook only if config exists
  140.         if (config) {
  141.             try {
  142.                 // Pass potentially null elements if lookup failed earlier
  143.                 config.onDeactivate?.(panel, tab);
  144.             } catch (e) {
  145.                 error(`Error during onDeactivate for ${scriptId}:`, e);
  146.             }
  147.         }
  148.     }
  149.  
  150.     /**
  151.      * Activates the STM tab specified by the scriptId.
  152.      * Adds active classes, ensures panel display, and calls the onActivate callback.
  153.      * Does NOT change activeStmTabId itself.
  154.      * Does NOT deactivate other tabs (STM or native).
  155.      * @param {string} scriptId The ID of the STM tab to activate visuals/callbacks for.
  156.      * @returns {boolean} True if activation visuals/callback were attempted, false if elements/config not found.
  157.      */
  158.     function _activateStmTabVisualsAndCallback(scriptId) {
  159.         const config = registeredTabs.get(scriptId);
  160.         if (!config) {
  161.             error(`Cannot activate visuals: ${scriptId}. Config not found.`);
  162.             return false;
  163.         }
  164.  
  165.         const tab = getTabElementImpl(scriptId);
  166.         const panel = getPanelElementImpl(scriptId);
  167.  
  168.         if (!tab || !panel) {
  169.             error(`Cannot activate visuals: ${scriptId}. Tab or Panel element not found.`);
  170.             return false;
  171.         }
  172.  
  173.         // Activate the new STM tab/panel visuals
  174.         tab.classList.add(ACTIVE_CLASSES.TAB);
  175.         panel.classList.add(ACTIVE_CLASSES.PANEL);
  176.         panel.style.display = 'block';
  177.  
  178.         // Call the script's activation hook
  179.         try {
  180.             config.onActivate?.(panel, tab);
  181.         } catch (e) {
  182.             error(`Error during onActivate for ${scriptId}:`, e);
  183.             // Activation visuals already applied, hard to revert cleanly. Error logged.
  184.         }
  185.         return true; // Activation attempted
  186.     }
  187.  
  188.     /** Handles clicks within the tab container to switch tabs. */
  189.     function handleTabClick(event) {
  190.         const clickedTabElement = event.target.closest(SELECTORS.SITE_TAB); // Get the specific tab element clicked
  191.         if (!clickedTabElement || !tabContainerEl || !panelContainerEl) {
  192.             return; // Clicked outside a known tab or containers not ready
  193.         }
  194.  
  195.         const isStmTab = clickedTabElement.matches(`span[${ATTRS.MANAGED}][${ATTRS.SCRIPT_ID}]`);
  196.         const clickedStmScriptId = isStmTab ? clickedTabElement.getAttribute(ATTRS.SCRIPT_ID) : null;
  197.  
  198.         // --- Case 1: Clicked an STM Tab ---
  199.         if (isStmTab && clickedStmScriptId) {
  200.             event.stopPropagation(); // Prevent site handler interference
  201.  
  202.             if (clickedStmScriptId === activeStmTabId) {
  203.                 // log(`Clicked already active STM tab: ${clickedStmScriptId}`);
  204.                 return; // Already active, do nothing
  205.             }
  206.  
  207.             // --- Deactivate previous tab (if any) ---
  208.             const previousActiveStmId = activeStmTabId; // Store the ID before changing state
  209.             if (previousActiveStmId) {
  210.                 // Deactivate the previously active *STM* tab
  211.                 _deactivateStmTabVisualsAndCallback(previousActiveStmId);
  212.             } else {
  213.                 // If no STM tab was active, ensure any *native* site tab is visually deactivated
  214.                 // This prepares for the STM tab to become the only active one.
  215.                 panelContainerEl.querySelectorAll(`:scope > ${SELECTORS.SITE_PANEL}.${ACTIVE_CLASSES.PANEL}:not([${ATTRS.MANAGED}])`)
  216.                     .forEach(p => p.classList.remove(ACTIVE_CLASSES.PANEL));
  217.                 tabContainerEl.querySelectorAll(`:scope > ${SELECTORS.SITE_TAB}.${ACTIVE_CLASSES.TAB}:not([${ATTRS.MANAGED}])`)
  218.                     .forEach(t => t.classList.remove(ACTIVE_CLASSES.TAB));
  219.             }
  220.  
  221.             // --- Activate the clicked STM tab ---
  222.             if (_activateStmTabVisualsAndCallback(clickedStmScriptId)) {
  223.                 activeStmTabId = clickedStmScriptId; // Update the state *after* successful activation attempt
  224.             } else {
  225.                 // Activation failed (elements missing?), revert state if needed?
  226.                 // For now, log the error and potentially leave state inconsistent.
  227.                 activeStmTabId = null; // Or revert to previousActiveStmId? Null is safer.
  228.             }
  229.  
  230.             return; // Handled by STM
  231.         }
  232.  
  233.         // --- Case 2: Clicked a Native Site Tab ---
  234.         if (!isStmTab && clickedTabElement.matches(`${SELECTORS.SITE_TAB}:not([${ATTRS.MANAGED}])`)) {
  235.             // log(`Native site tab clicked.`);
  236.  
  237.             // If an STM tab *was* active, deactivate its visuals and clear STM's active state.
  238.             if (activeStmTabId) {
  239.                 // log(`Deactivating current STM tab (${activeStmTabId}) due to native tab click.`);
  240.                 _deactivateStmTabVisualsAndCallback(activeStmTabId);
  241.                 activeStmTabId = null; // Clear STM state
  242.             }
  243.  
  244.             // **Allow propagation** - Let the site's own click handler run to manage the native tab.
  245.             // log("Allowing event propagation for native tab handler.");
  246.             return;
  247.         }
  248.  
  249.         // --- Case 3: Clicked the STM Separator ---
  250.         if (clickedTabElement.matches(`span[${ATTRS.SEPARATOR}]`)) {
  251.             event.stopPropagation(); // Do nothing, prevent site handler
  252.             // log("Separator clicked, propagation stopped.");
  253.             return;
  254.         }
  255.  
  256.         // If click was somewhere else (e.g., empty space in tab container), do nothing specific.
  257.         // log("Clicked non-tab area.");
  258.     }
  259.  
  260.     /** Attaches the main click listener to the tab container. */
  261.     function attachTabClickListener() {
  262.         if (!tabContainerEl) return;
  263.         tabContainerEl.removeEventListener('click', handleTabClick, true);
  264.         tabContainerEl.addEventListener('click', handleTabClick, true); // Use capture phase
  265.         log('Tab click listener attached.');
  266.     }
  267.  
  268.     /** Helper to create the SINGLE separator span */
  269.     function createSeparator() {
  270.          const separator = document.createElement('span');
  271.          separator.className = SELECTORS.SITE_SEPARATOR ? SELECTORS.SITE_SEPARATOR.substring(1) : 'settings-tab-separator-fallback';
  272.          separator.setAttribute(ATTRS.MANAGED, 'true');
  273.          separator.setAttribute(ATTRS.SEPARATOR, 'true');
  274.          separator.textContent = '|';
  275.          return separator;
  276.      }
  277.  
  278.     /** Creates and inserts the tab and panel elements for a given script config. */
  279.     function createTabAndPanel(config) {
  280.         if (!tabContainerEl || !panelContainerEl) { error(`Cannot create tab/panel for ${config.scriptId}: Containers not found.`); return; }
  281.         if (tabContainerEl.querySelector(`span[${ATTRS.SCRIPT_ID}="${config.scriptId}"]`)) { log(`Tab element already exists for ${config.scriptId}, skipping creation.`); return; }
  282.  
  283.         log(`Creating tab/panel for: ${config.scriptId}`);
  284.  
  285.         const newTab = document.createElement('span');
  286.         newTab.className = SELECTORS.SITE_TAB.substring(1);
  287.         newTab.textContent = config.tabTitle;
  288.         newTab.setAttribute(ATTRS.SCRIPT_ID, config.scriptId);
  289.         newTab.setAttribute(ATTRS.MANAGED, 'true');
  290.         newTab.setAttribute('title', `${config.tabTitle} (Settings by ${config.scriptId})`);
  291.         const desiredOrder = typeof config.order === 'number' ? config.order : Infinity;
  292.         newTab.setAttribute(ATTRS.ORDER, desiredOrder);
  293.  
  294.         const newPanel = document.createElement('div');
  295.         newPanel.className = SELECTORS.SITE_PANEL.substring(1);
  296.         newPanel.setAttribute(ATTRS.SCRIPT_ID, config.scriptId);
  297.         newPanel.setAttribute(ATTRS.MANAGED, 'true');
  298.         newPanel.id = `${MANAGER_ID}-${config.scriptId}-panel`;
  299.  
  300.         // --- Insertion Logic (Single Separator & Ordered Tabs) ---
  301.         let insertBeforeTab = null;
  302.         const existingStmTabs = Array.from(tabContainerEl.querySelectorAll(`span[${ATTRS.MANAGED}][${ATTRS.SCRIPT_ID}]`));
  303.         existingStmTabs.sort((a, b) => (parseInt(a.getAttribute(ATTRS.ORDER) || Infinity, 10)) - (parseInt(b.getAttribute(ATTRS.ORDER) || Infinity, 10)));
  304.         for (const existingTab of existingStmTabs) {
  305.             if (desiredOrder < (parseInt(existingTab.getAttribute(ATTRS.ORDER) || Infinity, 10))) {
  306.                 insertBeforeTab = existingTab; break;
  307.             }
  308.         }
  309.  
  310.         const isFirstStmTabBeingAdded = existingStmTabs.length === 0;
  311.         let separatorInstance = null;
  312.         if (!isSeparatorAdded && isFirstStmTabBeingAdded) {
  313.             separatorInstance = createSeparator();
  314.             isSeparatorAdded = true;
  315.             log('Adding the main STM separator.');
  316.         }
  317.  
  318.         if (insertBeforeTab) {
  319.             if (separatorInstance) tabContainerEl.insertBefore(separatorInstance, insertBeforeTab);
  320.             tabContainerEl.insertBefore(newTab, insertBeforeTab);
  321.         } else {
  322.             if (separatorInstance) tabContainerEl.appendChild(separatorInstance);
  323.             tabContainerEl.appendChild(newTab);
  324.         }
  325.         // --- End Insertion Logic ---
  326.  
  327.         panelContainerEl.appendChild(newPanel);
  328.  
  329.         // --- Initialize Panel Content ---
  330.         try {
  331.             Promise.resolve(config.onInit(newPanel, newTab)).catch(e => {
  332.                 error(`Error during async onInit for ${config.scriptId}:`, e);
  333.                 newPanel.innerHTML = `<p style="color: red;">Error initializing settings panel for ${config.scriptId}. See console.</p>`;
  334.             });
  335.         } catch (e) {
  336.             error(`Error during sync onInit for ${config.scriptId}:`, e);
  337.             newPanel.innerHTML = `<p style="color: red;">Error initializing settings panel for ${config.scriptId}. See console.</p>`;
  338.         }
  339.     }
  340.  
  341.     /** Sorts and processes all pending registrations once the manager is initialized. */
  342.     function processPendingRegistrations() {
  343.         if (!isInitialized) return;
  344.         log(`Processing ${pendingRegistrations.length} pending registrations...`);
  345.         pendingRegistrations.sort((a, b) => {
  346.              const orderA = typeof a.order === 'number' ? a.order : Infinity;
  347.              const orderB = typeof b.order === 'number' ? b.order : Infinity;
  348.              return orderA - orderB;
  349.         });
  350.         while (pendingRegistrations.length > 0) {
  351.             const config = pendingRegistrations.shift();
  352.             if (!registeredTabs.has(config.scriptId)) {
  353.                 registeredTabs.set(config.scriptId, config);
  354.                 createTabAndPanel(config);
  355.             } else {
  356.                 warn(`Script ID ${config.scriptId} was already registered. Skipping pending registration.`);
  357.             }
  358.         }
  359.         log('Finished processing pending registrations.');
  360.     }
  361.  
  362.     // --- Initialization and Observation ---
  363.  
  364.     /** Main initialization routine. Finds elements, attaches listener, processes queue. */
  365.     function initializeManager() {
  366.         if (!findSettingsElements()) { return false; }
  367.         if (isInitialized && settingsMenuEl && tabContainerEl && panelContainerEl) {
  368.              attachTabClickListener(); return true;
  369.         }
  370.         log('Initializing Settings Tab Manager...');
  371.         attachTabClickListener();
  372.         isInitialized = true;
  373.         log('Manager is ready.');
  374.         resolveReadyPromise(publicApi);
  375.         processPendingRegistrations();
  376.         return true;
  377.     }
  378.  
  379.     // --- Mutation Observer ---
  380.     const observer = new MutationObserver((mutationsList, obs) => {
  381.         let needsReInitCheck = false;
  382.         if (!isInitialized && document.querySelector(SELECTORS.SETTINGS_MENU)) { needsReInitCheck = true; }
  383.         else if (isInitialized && settingsMenuEl && !document.body.contains(settingsMenuEl)) {
  384.             warn('Settings menu seems to have been removed from DOM.');
  385.             isInitialized = false; settingsMenuEl = null; tabContainerEl = null; panelContainerEl = null; isSeparatorAdded = false; activeStmTabId = null;
  386.             needsReInitCheck = true;
  387.         }
  388.         if (!settingsMenuEl || needsReInitCheck) {
  389.              for (const mutation of mutationsList) {
  390.                  if (mutation.addedNodes) {
  391.                      for (const node of mutation.addedNodes) {
  392.                          if (node.nodeType === Node.ELEMENT_NODE) {
  393.                               const menu = (node.matches && node.matches(SELECTORS.SETTINGS_MENU)) ? node : (node.querySelector ? node.querySelector(SELECTORS.SETTINGS_MENU) : null);
  394.                              if (menu) { log('Settings menu detected in DOM via MutationObserver.'); needsReInitCheck = true; break; }
  395.                          }
  396.                      }
  397.                  }
  398.                  if (needsReInitCheck) break;
  399.              }
  400.         }
  401.         if (needsReInitCheck) { setTimeout(() => { if (initializeManager()) { log('Manager initialized/re-initialized successfully via MutationObserver.'); } }, 0); }
  402.     });
  403.  
  404.     // Start observing
  405.     observer.observe(document.body, { childList: true, subtree: true });
  406.     log('Mutation observer started for settings menu detection.');
  407.  
  408.     // Attempt initial initialization
  409.     setTimeout(initializeManager, 0);
  410.  
  411.  
  412.     // --- API Implementation Functions ---
  413.  
  414.     /** Public API function to register a new settings tab. */
  415.     function registerTabImpl(config) {
  416.         // --- Input Validation ---
  417.         if (!config || typeof config !== 'object') { error('Registration failed: Invalid config object provided.'); return false; }
  418.         const { scriptId, tabTitle, onInit } = config;
  419.         if (typeof scriptId !== 'string' || !scriptId.trim()) { error('Registration failed: Invalid or missing scriptId (string).', config); return false; }
  420.         if (typeof tabTitle !== 'string' || !tabTitle.trim()) { error('Registration failed: Invalid or missing tabTitle (string).', config); return false; }
  421.         if (typeof onInit !== 'function') { error('Registration failed: onInit callback must be a function.', config); return false; }
  422.         if (config.onActivate && typeof config.onActivate !== 'function') { error(`Registration for ${scriptId} failed: onActivate (if provided) must be a function.`); return false; }
  423.         if (config.onDeactivate && typeof config.onDeactivate !== 'function') { error(`Registration for ${scriptId} failed: onDeactivate (if provided) must be a function.`); return false; }
  424.         if (config.order !== undefined && typeof config.order !== 'number') { warn(`Registration for ${scriptId}: Invalid order value provided. Defaulting to end.`, config); delete config.order; }
  425.         if (registeredTabs.has(scriptId) || pendingRegistrations.some(p => p.scriptId === scriptId)) { warn(`Registration failed: Script ID "${scriptId}" is already registered or pending.`); return false; }
  426.         // --- End Validation ---
  427.  
  428.         log(`Registration accepted for: ${scriptId}`);
  429.         const registrationData = { ...config }; // Shallow clone
  430.  
  431.         if (isInitialized) {
  432.             registeredTabs.set(scriptId, registrationData);
  433.             createTabAndPanel(registrationData);
  434.         } else {
  435.             log(`Manager not ready, queueing registration for ${scriptId}`);
  436.             pendingRegistrations.push(registrationData);
  437.              pendingRegistrations.sort((a, b) => { // Keep queue sorted
  438.                  const orderA = typeof a.order === 'number' ? a.order : Infinity;
  439.                  const orderB = typeof b.order === 'number' ? b.order : Infinity;
  440.                  return orderA - orderB;
  441.              });
  442.         }
  443.         return true; // Registration accepted
  444.     }
  445.  
  446.     /** Public API function to programmatically activate a registered tab. */
  447.     function activateTabImpl(scriptId) {
  448.         // Add trace for debugging client script calls
  449.         console.trace(`[${MANAGER_ID}] activateTabImpl called with ID: ${scriptId}`);
  450.  
  451.         if (typeof scriptId !== 'string' || !scriptId.trim()) {
  452.             error('activateTab failed: Invalid scriptId provided.'); return;
  453.         }
  454.         if (!isInitialized) {
  455.             warn(`Cannot activate tab ${scriptId} yet, manager not initialized.`); return;
  456.         }
  457.         if (!registeredTabs.has(scriptId)) {
  458.             error(`activateTab failed: Script ID "${scriptId}" is not registered.`); return;
  459.         }
  460.         if (scriptId === activeStmTabId) {
  461.             // log(`activateTab: Tab ${scriptId} is already active.`);
  462.             return; // Already active, do nothing
  463.         }
  464.  
  465.         // --- Deactivate previous tab (if any) ---
  466.         const previousActiveStmId = activeStmTabId; // Store the ID before changing state
  467.         if (previousActiveStmId) {
  468.             _deactivateStmTabVisualsAndCallback(previousActiveStmId);
  469.         } else {
  470.             // If no STM tab was active, ensure any *native* site tab is visually deactivated
  471.             panelContainerEl?.querySelectorAll(`:scope > ${SELECTORS.SITE_PANEL}.${ACTIVE_CLASSES.PANEL}:not([${ATTRS.MANAGED}])`).forEach(p => p.classList.remove(ACTIVE_CLASSES.PANEL));
  472.             tabContainerEl?.querySelectorAll(`:scope > ${SELECTORS.SITE_TAB}.${ACTIVE_CLASSES.TAB}:not([${ATTRS.MANAGED}])`).forEach(t => t.classList.remove(ACTIVE_CLASSES.TAB));
  473.         }
  474.  
  475.         // --- Activate the requested STM tab ---
  476.         if (_activateStmTabVisualsAndCallback(scriptId)) {
  477.             activeStmTabId = scriptId; // Update the state *after* successful activation attempt
  478.             log(`Programmatically activated tab: ${scriptId}`);
  479.         } else {
  480.             // Activation failed (elements missing?)
  481.             warn(`Programmatic activation failed for tab: ${scriptId}`);
  482.             // Attempt to restore previous state? Or leave as is? Leave as is for now.
  483.             // If previousActiveStmId existed, maybe try to reactivate it? Complex.
  484.             activeStmTabId = null; // Set to null if activation fails
  485.         }
  486.     }
  487.  
  488.     /** Public API function to get the DOM element for a tab's panel. */
  489.     function getPanelElementImpl(scriptId) {
  490.         if (!isInitialized || !panelContainerEl) return null;
  491.         if (typeof scriptId !== 'string' || !scriptId.trim()) return null;
  492.         return panelContainerEl.querySelector(`div[${ATTRS.MANAGED}][${ATTRS.SCRIPT_ID}="${scriptId}"]`);
  493.     }
  494.  
  495.     /** Public API function to get the DOM element for a tab's clickable part. */
  496.     function getTabElementImpl(scriptId) {
  497.         if (!isInitialized || !tabContainerEl) return null;
  498.         if (typeof scriptId !== 'string' || !scriptId.trim()) return null;
  499.         return tabContainerEl.querySelector(`span[${ATTRS.MANAGED}][${ATTRS.SCRIPT_ID}="${scriptId}"]`);
  500.      }
  501.  
  502.     // --- Global Exposure ---
  503.     if (window.SettingsTabManager && window.SettingsTabManager !== publicApi) {
  504.         warn('window.SettingsTabManager is already defined by another script or instance! Potential conflict.');
  505.     } else if (!window.SettingsTabManager) {
  506.         Object.defineProperty(window, 'SettingsTabManager', {
  507.             value: publicApi,
  508.             writable: false,
  509.             configurable: true
  510.         });
  511.         log('SettingsTabManager API exposed on window.');
  512.     }
  513.  
  514. })(); // End of IIFE