gemini-model-switcher.user.js

// ==UserScript==
// @name         Gemini Model Switcher (Cmd+Ctrl)
// @namespace    http://tampermonkey.net/
// @version      1.2
// @description  Switch Gemini models using Cmd+Ctrl+1 (Fast), Cmd+Ctrl+2 (Thinking), Cmd+Ctrl+3 (Pro)
// @author       You
// @match        https://gemini.google.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const CONFIG = {
        triggerSelector: 'div[data-test-id="bard-mode-menu-button"]',
        keyMap: {
            'Digit1': 'button[data-test-id="bard-mode-option-fast"]',     // Cmd + Ctrl + 1 -> Fast
            'Digit2': 'button[data-test-id="bard-mode-option-thinking"]',      // Cmd + Ctrl + 2 -> Thinking
            'Digit3': 'button[data-test-id="bard-mode-option-pro"]'  // Cmd + Ctrl + 3 -> Pro
        },
        pollingIntervalMs: 50,
        maxRetries: 20
    };

    function waitForElement(selector, callback) {
        let retries = 0;
        const interval = setInterval(() => {
            const element = document.querySelector(selector);
            if (element) {
                clearInterval(interval);
                callback(element);
            } else {
                retries++;
                if (retries >= CONFIG.maxRetries) {
                    clearInterval(interval);
                    // console.warn(`[GeminiSwitcher] Timeout waiting for selector: ${selector}`);
                }
            }
        }, CONFIG.pollingIntervalMs);
    }

    function triggerClick(element) {
        if (!element) return;
        element.click();
    }

    document.addEventListener('keydown', (e) => {
        if (!e.metaKey || !e.ctrlKey) return;

        const targetModelSelector = CONFIG.keyMap[e.code];

        if (targetModelSelector) {
            e.preventDefault();
            e.stopPropagation();

            const triggerBtn = document.querySelector(CONFIG.triggerSelector);
            
            if (!triggerBtn) {
                console.error('[GeminiSwitcher] Menu trigger button not found.');
                return;
            }

            triggerClick(triggerBtn);

            waitForElement(targetModelSelector, (modelBtn) => {
                console.log(`[GeminiSwitcher] Switching model via Cmd+Ctrl+${e.key}...`);
                triggerClick(modelBtn);
            });
        }
    });

    console.log('[GeminiSwitcher] Loaded. Use Cmd+Ctrl+1/2/3 to switch models.');
})();