Gemini Enhancement

Adds a button to open new Gemini tab and squircle input
换行
// ==UserScript==
// @name         Gemini Enhancement
// @namespace    https://loongphy.com
// @version      1.2
// @description  Adds a button to open new Gemini tab and squircle input
// @author       loongphy
// @match        https://gemini.google.com/*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    // ==================== Styles ====================
    const STYLES = `
        /* Squircle for input box */
        input-area-v2 { corner-shape: squircle; }

        /* New tab button - positioned next to Gemini logo */
        .gemini-new-tab-btn {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: transparent;
            border: none;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.2s ease;
            color: #444746;
            margin-left: 6px;
            flex-shrink: 0;
            vertical-align: middle;
            align-self: center;
        }
        .gemini-new-tab-btn:hover {
            background-color: rgba(68, 71, 70, 0.08);
        }
        .gemini-new-tab-btn:active {
            background-color: rgba(68, 71, 70, 0.12);
        }
        .gemini-new-tab-btn svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }
        @media (prefers-color-scheme: dark) {
            .gemini-new-tab-btn {
                color: #E8EAED;
            }
            .gemini-new-tab-btn:hover {
                background-color: rgba(232, 234, 237, 0.18);
            }
            .gemini-new-tab-btn:active {
                background-color: rgba(232, 234, 237, 0.26);
            }
        }
    `;

    function injectStyles() {
        const styleEl = document.createElement('style');
        styleEl.textContent = STYLES;
        document.head.appendChild(styleEl);
    }

    function createNewTabButton() {
        const button = document.createElement('button');
        button.className = 'gemini-new-tab-btn';
        button.title = 'Open Gemini in New Tab';
        
        // SVG icon (open in new tab) using DOM APIs
        const svg = document.createElementNS('http://www.w3.org/2000/svg', 'svg');
        svg.setAttribute('viewBox', '0 0 24 24');
        const path = document.createElementNS('http://www.w3.org/2000/svg', 'path');
        path.setAttribute('d', 'M19 19H5V5h7V3H5a2 2 0 0 0-2 2v14a2 2 0 0 0 2 2h14a2 2 0 0 0 2-2v-7h-2v7zM14 3v2h3.59l-9.83 9.83 1.41 1.41L19 6.41V10h2V3h-7z');
        svg.appendChild(path);
        button.appendChild(svg);

        button.addEventListener('click', () => {
            window.open('https://gemini.google.com/app', '_blank');
        });

        // Mount button after Gemini text
        function mountButton() {
            const geminiText = document.querySelector('.bard-text');
            if (geminiText && geminiText.parentNode) {
                // Prevent duplicate insertion or unnecessary moves
                if (geminiText.nextSibling === button) return;
                
                geminiText.parentNode.insertBefore(button, geminiText.nextSibling);
            }
        }

        // Observe DOM changes to handle SPA navigation and dynamic rendering
        const observer = new MutationObserver(() => {
            mountButton();
        });
        
        observer.observe(document.body, { childList: true, subtree: true });
        mountButton();
    }

    // ==================== Initialize ====================
    function init() {
        injectStyles();
        createNewTabButton();
    }

    init();
})();