Dark Mode Auto Toggle

Enable dark mode with a toggle button and automatically based on location
换行
// ==UserScript==
// @name         Dark Mode Auto Toggle
// @version      0.2.0
// @description  Enable dark mode with a toggle button and automatically based on location
// @namespace    https://greasyfork.org/en/users/28298
// @author       https://greasyfork.org/en/users/28298
// @homepage     https://greasyfork.org/en/scripts/523690
// @license      MIT
// @match        *://*/*
// @grant        GM_getValue
// @grant        GM_setValue
// ==/UserScript==
 
// @grant        none
// original author: Michael Wang https://greasyfork.org/en/scripts/472251-dark-mode/code
// with help of claude ai
 
(function() {
    'use strict';
 
    //////////////////////////////////////////////////////////////////////////
    // manually tell domain's original mode, because auto detection would fail
    const domainModes = {
        'claude.ai'       : 'bright',
        'chat.openai.com' : 'dark',
        'deepseek.com'    : 'dark',
        'linux.do'        : 'dark',
        'duckduckgo.com'  : 'dark',
        'www.google.com'  : 'dark',
        'youtube.com'     : 'dark',
        'greasyfork.org'  : 'bright',
        'web.telegram.org': 'dark',
        '192.168.1.1'     : 'dark',
        '192.168.1.2'     : 'dark',
        '192.168.1.3'     : 'dark',
        '127.0.0.1'       : 'dark',
    };
    /////////////////////////////////////////////////////////////////////////
 
    // Create style element for dark mode
    const darkStyle = document.createElement('style');
    darkStyle.textContent = `
        html {
            filter: invert(1) hue-rotate(180deg) contrast(0.8);
        }
        /** reverse filter for media elements */
        img, video, picture, canvas, iframe, embed {
            filter: invert(1) hue-rotate(180deg);
        }
    `;
 
    // Initialize based on page's current state
    let darkMode = false; // Start with no filter
 
    // Function to detect if page is already dark
    function isPageDark() {
        const url = window.location.hostname;
        // Check if domain is in our list
        for (const domain in domainModes) {
            if (url.includes(domain)) {
                return domainModes[domain] === 'dark';
            }
        }
 
        // auto detection
        function isDarkMode() {
            try {
                  const bgcolor = window.getComputedStyle(document.body).backgroundColor;
                  const rgb = color.match(/\d+/g);
                  if (!rgb) return 255 < 128; // Default to light if can't detect
                  // Use perceived brightness formula
                  return (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000 < 128;
              } catch (e) {
                  return false;
              }
        }
        function checkDarkModeClasses() {
            const html = document.documentElement;
            const body = document.body;
 
            const darkClasses = ['dark', 'dark-mode', 'dark-theme', 'theme-dark'];
            return darkClasses.some(className =>
                html.classList.contains(className) || body.classList.contains(className)
            );
        }
        function checkDarkModeAttributes() {
            const html = document.documentElement;
 
            return html.getAttribute('data-theme') === 'dark' ||
                html.getAttribute('data-color-mode') === 'dark';
        }
 
        // Check computed colors
        const isDarkByColor = isDarkMode();
        // Check classes and attributes
        const isDarkByClass = checkDarkModeClasses();
        const isDarkByAttribute = checkDarkModeAttributes();
        // Site is likely in dark mode if any of these are true
 
        return isDarkByClass || isDarkByAttribute || isDarkByColor;
    }
 
    // Initialize darkMode based on stored preference or page state
    const pageIsDark = isPageDark();
 
    // Create toggle button
    const button = document.createElement('button');
    button.innerHTML = pageIsDark ? '☀️' : '🌛';
    button.style.position = 'fixed';
    button.style.top = '45px';
    button.style.right = '10px';
    button.style.zIndex = '1000';
    button.style.background = 'none';
    button.style.border = 'none';
    button.style.fontSize = '24px';
    button.style.cursor = 'pointer';
    button.style.color = 'inherit';
 
    // Function to get sunrise/sunset times
    async function getSunTimes() {
        // approximate times
        const now = new Date();
        return {
            sunrise: new Date(now.setHours(8, 0, 0, 0)),
            sunset: new Date(now.setHours(18, 0, 0, 0))
        };
    }
 
    // Function to toggle dark mode
    function toggleDarkMode(forceDark) {
        if (forceDark !== undefined) {
            // Auto dark mode (sunrise/sunset)
            if (pageIsDark) {
                // If page is already dark, don't change anything
                return;
            }
            darkMode = forceDark;
        } else {
            // Manual toggle - always allow regardless of pageIsDark
            darkMode = !darkMode;
        }
 
        if (darkMode) {
            document.head.appendChild(darkStyle);
            button.innerHTML = pageIsDark ? '🌛' : '☀️';
        } else {
            if (darkStyle.parentNode) {
                document.head.removeChild(darkStyle);
            }
            button.innerHTML = pageIsDark ? '☀️' : '🌛';
        }
    }
 
    // Function to check and update dark mode based on time
    async function updateDarkMode() {
        const sunTimes = await getSunTimes();
        const now = new Date();
        const isDark = now < sunTimes.sunrise || now > sunTimes.sunset;
        toggleDarkMode(isDark);
    }
 
    // Add settings button
    const settingsButton = document.createElement('button');
    settingsButton.innerHTML = '⚙';
    settingsButton.style.position = 'fixed';
    settingsButton.style.top = '40px';
    settingsButton.style.right = '15px';
    settingsButton.style.zIndex = '1000';
    settingsButton.style.background = 'none';
    settingsButton.style.border = 'none';
    settingsButton.style.fontSize = '12px';
    settingsButton.style.cursor = 'pointer';
    settingsButton.style.color = 'inherit';
 
    // Settings panel to reset location
    settingsButton.addEventListener('click', () => {
        if (confirm('Reset location settings?')) {
            GM_setValue('userLocation', null);
            location.reload();
        }
    });
 
    // Initial update
    updateDarkMode();
 
    // Update every half hour (1800000)
    setInterval(updateDarkMode, 1800000);
 
    // Manual toggle still works
    button.addEventListener('click', () => toggleDarkMode());
 
    // Add buttons to page
    document.body.appendChild(button);
})();