后台播放、自动连播、音量记忆，并提供设置面板进行开关。修复了自动连播的稳定性和设置面板拖动变形的问题。
// ==UserScript==
// @name 四川大学智慧教育平台增强脚本 (后台+连播+音量记忆)
// @namespace http://tampermonkey.net/
// @version 2.3.2
// @description 后台播放、自动连播、音量记忆，并提供设置面板进行开关。修复了自动连播的稳定性和设置面板拖动变形的问题。
// @author ff66ccff & Gemini & AI Assistant
// @match https://ecourse.scu.edu.cn/learn/course/mooc/*
// @match *://*.scu.edu.cn/*
// @grant GM_setValue
// @grant GM_getValue
// @run-at document-idle
// @license MIT
// ==/UserScript==
(function() {
'use strict';
// --- 默认设置 ---
const SETTINGS = {
backgroundPlay: true,
autoNextVideo: true
};
// --- 加载/保存设置 ---
function loadSettings() {
SETTINGS.backgroundPlay = GM_getValue('backgroundPlay', true);
SETTINGS.autoNextVideo = GM_getValue('autoNextVideo', true);
}
function saveSettings() {
GM_setValue('backgroundPlay', SETTINGS.backgroundPlay);
GM_setValue('autoNextVideo', SETTINGS.autoNextVideo);
}
// --- 功能1：后台播放 ---
function enableBackgroundPlay() {
if (SETTINGS.backgroundPlay) {
try {
Object.defineProperty(document, 'visibilityState', { value: 'visible', configurable: true });
Object.defineProperty(document, 'hidden', { value: false, configurable: true });
console.log('[增强脚本] 后台播放功能已激活。');
} catch (e) {
console.error('[增强脚本] 后台播放功能注入失败:', e);
}
}
}
// --- 功能2：视频增强功能 (自动连播 + 音量记忆) ---
function setupVideoPlayerExtensions() {
const videoInterval = setInterval(() => {
const videoElement = document.querySelector('video');
if (videoElement) {
clearInterval(videoInterval);
console.log('[增强脚本] 视频元素已找到，增强功能准备就绪。');
// --- 新增：音量记忆模块 ---
try {
// 1. 应用已保存的音量
const savedVolume = GM_getValue('videoVolume', 1.0); // 默认音量为1.0 (100%)
videoElement.volume = savedVolume;
console.log(`[增强脚本] 已自动应用上次保存的音量: ${Math.round(savedVolume * 100)}%`);
// 2. 监听音量变化并保存
videoElement.addEventListener('volumechange', () => {
// 当用户调整音量时，保存新的音量值
GM_setValue('videoVolume', videoElement.volume);
});
} catch (e) {
console.error('[增强脚本] 应用或监听音量失败:', e);
}
// --- 自动连播模块 ---
if (SETTINGS.autoNextVideo) {
videoElement.addEventListener('ended', () => {
if (!SETTINGS.autoNextVideo) return;
console.log('[增强脚本] 视频播放结束，正在查找“下一个学习内容”按钮...');
let attempts = 0;
const maxAttempts = 20; // 最多尝试20次 (10秒)
const findButtonInterval = setInterval(() => {
attempts++;
const nextButton = document.querySelector('.next_video_btn');
// 检查按钮是否存在且可见 (offsetParent 在元素可见时才不为null)
if (nextButton && nextButton.offsetParent !== null) {
console.log('[增强脚本] “下一个学习内容”按钮已找到且可见，执行点击。');
nextButton.click();
clearInterval(findButtonInterval);
} else if (attempts >= maxAttempts) {
console.error('[增强脚本] 未能找到“下一个学习内容”按钮，或按钮不可见，自动连播失败。');
clearInterval(findButtonInterval);
}
}, 500);
});
}
}
}, 1000);
}
// --- 功能3：创建设置面板 (拖动问题已修复) ---
function createSettingsPanel() {
const styles=`#scu-script-settings-btn{position:fixed;bottom:20px;right:20px;z-index:9999;padding:10px 15px;background-color:#AF2E26;color:white;border:none;border-radius:5px;cursor:pointer;font-size:14px;box-shadow:0 2px 10px rgba(0,0,0,0.2)}#scu-script-settings-panel{display:none;position:fixed;bottom:70px;right:20px;z-index:9998;background:#fff;border:1px solid #ddd;border-radius:8px;box-shadow:0 4px 15px rgba(0,0,0,0.2);padding:20px;width:250px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}#scu-script-settings-panel .settings-header{font-size:18px;font-weight:bold;color:#333;margin-bottom:15px;cursor:move;padding-bottom:10px;border-bottom:1px solid #eee}#scu-script-settings-panel .setting-item{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}#scu-script-settings-panel label{color:#555}#scu-script-settings-panel .switch{position:relative;display:inline-block;width:44px;height:24px}#scu-script-settings-panel .switch input{opacity:0;width:0;height:0}#scu-script-settings-panel .slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:#ccc;transition:.4s;border-radius:24px}#scu-script-settings-panel .slider:before{position:absolute;content:"";height:18px;width:18px;left:3px;bottom:3px;background-color:white;transition:.4s;border-radius:50%}#scu-script-settings-panel input:checked+.slider{background-color:#AF2E26}#scu-script-settings-panel input:checked+.slider:before{transform:translateX(20px)}`;
const styleSheet=document.createElement("style");
styleSheet.type="text/css";
styleSheet.innerText=styles;
document.head.appendChild(styleSheet);
const panelHTML=`
<div class="settings-header">脚本设置 (可拖动)</div>
<div class="setting-item">
<label for="bg-play-switch">后台持续播放</label>
<label class="switch">
<input type="checkbox" id="bg-play-switch">
<span class="slider"></span>
</label>
</div>
<div class="setting-item">
<label for="auto-next-switch">视频自动连播</label>
<label class="switch">
<input type="checkbox" id="auto-next-switch">
<span class="slider"></span>
</label>
</div>
`;
const settingsBtn=document.createElement('button');
settingsBtn.id='scu-script-settings-btn';
settingsBtn.innerText='脚本设置';
const settingsPanel=document.createElement('div');
settingsPanel.id='scu-script-settings-panel';
settingsPanel.innerHTML=panelHTML;
document.body.appendChild(settingsBtn);
document.body.appendChild(settingsPanel);
const bgPlaySwitch=document.getElementById('bg-play-switch');
const autoNextSwitch=document.getElementById('auto-next-switch');
bgPlaySwitch.checked=SETTINGS.backgroundPlay;
autoNextSwitch.checked=SETTINGS.autoNextVideo;
bgPlaySwitch.addEventListener('change', (e) => {
SETTINGS.backgroundPlay=e.target.checked;
saveSettings();
alert('设置已保存，刷新页面后生效！');
});
autoNextSwitch.addEventListener('change', (e) => {
SETTINGS.autoNextVideo=e.target.checked;
saveSettings();
alert('“自动连播”设置已保存！\n此设置将在下一个视频播放时生效。');
});
// --- 面板的显示/隐藏和拖动逻辑 (已修复) ---
settingsBtn.addEventListener('click', () => {
settingsPanel.style.display=settingsPanel.style.display==='block'?'none':'block';
});
const header=settingsPanel.querySelector('.settings-header');
let isDragging = false;
let offset = { x: 0, y: 0 };
// **语法已修复**: 将全角符号 '。' 和 '，' 替换为半角符号 '.' 和 ','
header.addEventListener('mousedown', (e) => {
isDragging = true;
header.style.cursor = 'grabbing';
if (!settingsPanel.style.top) {
const rect = settingsPanel.getBoundingClientRect();
settingsPanel.style.top = `${rect.top}px`;
settingsPanel.style.left = `${rect.left}px`;
settingsPanel.style.bottom = 'auto';
settingsPanel.style.right = 'auto';
}
offset.x = e.clientX - parseFloat(settingsPanel.style.left);
offset.y = e.clientY - parseFloat(settingsPanel.style.top);
e.preventDefault();
});
document.addEventListener('mousemove', (e) => {
if (!isDragging) return;
settingsPanel.style.left = `${e.clientX - offset.x}px`;
settingsPanel.style.top = `${e.clientY - offset.y}px`;
});
document.addEventListener('mouseup', () => {
if (isDragging) {
isDragging = false;
header.style.cursor = 'move';
}
});
}
// --- 脚本主入口 ---
function main() {
console.log('[增强脚本] 脚本已加载 v2.3 (新增音量记忆)。');
loadSettings();
createSettingsPanel();
enableBackgroundPlay();
setupVideoPlayerExtensions(); // 替换旧的 enableAutoNextVideo()
}
setTimeout(main, 3000);
})();