YouTube Quick Speed Interface

Modify the YouTube HTML player interface
当前为 2023-07-21 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         YouTube Quick Speed Interface
// @name:en      YouTube Quick Speed Interface
// @namespace    https://twitter.com/CobleeH
// @version      1.10
// @description  Modify the YouTube HTML player interface
// @description:en Modify the YouTube HTML player interface
// @author       CobleeH
// @match        https://www.youtube.com/*
// @grant        none
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    // Add speed options
    function addSpeedOptions() {
        // Check if speed options are already added
        if (document.querySelector('.ytp-speed-options')) {
            return;
        }

        var rightControls = document.querySelector('.ytp-right-controls');
        var leftControls = document.querySelector('.ytp-left-controls');
        if (rightControls && leftControls) {
            var speedOptions = document.createElement('div');
            speedOptions.classList.add('ytp-speed-options');
            speedOptions.style.display = 'flex';
            speedOptions.style.alignItems = 'center';
            speedOptions.style.order = '2';
            speedOptions.style.marginLeft = '10px';
            speedOptions.style.marginRight = '25px';

            var label = document.createElement('span');
            label.innerText = 'Speed';
            speedOptions.appendChild(label);

            var speeds = [0.5, 1, 1.5, 2];
            speeds.forEach(function(speed) {
                var option = document.createElement('div');
                option.innerText = speed + 'x';
                option.classList.add('ytp-speed-option');
                option.style.cursor = 'pointer';
                option.style.marginLeft = '5px';
                option.addEventListener('click', function() {
                    var player = document.querySelector('.video-stream');
                    if (player) {
                        player.playbackRate = speed;
                        highlightOption(option);
                    }
                });

                option.addEventListener('mouseover', function() {
                    option.classList.add('highlighted');
                });

                option.addEventListener('mouseout', function() {
                    if (!option.classList.contains('active')) {
                        option.classList.remove('highlighted');
                    }
                });

                speedOptions.appendChild(option);
            });

            leftControls.style.order = '1';
            rightControls.style.order = '3';

            document.querySelector('.ytp-chrome-controls').appendChild(speedOptions);
        }
    }

    function highlightOption(option) {
        // Remove highlight from other options
        var options = document.querySelectorAll('.ytp-speed-option');
        options.forEach(function(opt) {
            opt.classList.remove('active');
        });

        // Add highlight to the current option
        option.classList.add('active');
    }

    // Add highlight styles
    var style = document.createElement('style');
    style.innerHTML = `
        .ytp-speed-option {
            transition: background-color 0.3s;
        }

        .ytp-speed-option:hover {
            background-color: rgba(211, 211, 211, 0.4);
        }

        .ytp-speed-option.active,
        .ytp-speed-option.active:hover {
            background-color: rgba(211, 211, 211, 0.4);
        }
    `;
    document.head.appendChild(style);

    // Listen for URL changes and automatically reset speed highlight to 1x
    var currentURL = window.location.href;
    setInterval(function() {
        var newURL = window.location.href;
        if (newURL !== currentURL) {
            // Reset speed options highlight on URL change
            var options = document.querySelectorAll('.ytp-speed-option');
            options.forEach(function(opt) {
                opt.classList.remove('active');
            });
            // Set 1x speed option as highlighted
            var oneXOption = document.querySelector('.ytp-speed-option:nth-child(3)'); // 1x is at the third position
            if (oneXOption) {
                oneXOption.classList.add('active');
            }
            // Update currentURL
            currentURL = newURL;
        }
    }, 500); // Check for URL changes every 0.5 seconds

    // Use MutationObserver to listen for changes in the player container element
    var observer = new MutationObserver(function(mutations) {
        mutations.forEach(function(mutation) {
            // Check for newly added nodes
            if (mutation.addedNodes) {
                Array.from(mutation.addedNodes).forEach(function(node) {
                    if (node.classList && node.classList.contains('html5-video-player')) {
                        // Add speed options when the player container element changes
                        addSpeedOptions();
                    }
                });
            }
        });
    });

    // Observe changes in the entire document
    observer.observe(document.documentElement, { childList: true, subtree: true });

    // Add speed options after the page is fully loaded
    document.addEventListener('DOMContentLoaded', function() {
        addSpeedOptions();
    });
})();
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