只有直播可用。把PPT拖至最大的窗口。
// ==UserScript==
// @name 东南大学直播课PPT自动截图
// @namespace http://tampermonkey.net/
// @version 1.1
// @description 只有直播可用。把PPT拖至最大的窗口。
// @author Vic and his AI
// @license MIT
// @match https://cvs.seu.edu.cn/*
// @require https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js
// @grant GM_download
// @grant GM_registerMenuCommand
// ==/UserScript==
(function() {
'use strict';
console.log('脚本已加载 - 东大直播课PPT自动截图');
// 配置参数
let CONFIG = {
targetSelector: '.player-view.player-view-1', // PPT容器选择器
checkInterval: 20000, // 检查间隔20秒
pixelTolerance: 0.05 // 像素容忍度，这里设置为5%
};
// 状态管理
let state = {
isMonitoring: false,
intervalId: null,
screenshotHistory: []
};
// 初始化UI
function initUI() {
const ui = document.createElement('div');
ui.id = 'ppt-monitor-ui';
ui.style.cssText = `
position: fixed;
top: 50%;
left: 0;
transform: translateY(-50%);
background: rgba(40,40,40,0.93);
color: #fff;
padding: 10px;
border-radius: 0 8px 8px 0;
box-shadow: 0 4px 12px rgba(0,0,0,0.25);
z-index: 99999;
font-family: Arial, sans-serif;
width: 50px;
min-width: 50px;
overflow: hidden;
transition: width 0.3s ease;
`;
// UI内容
ui.innerHTML = `
<div class="expanded-content" style="display:none;">
<h3 style="margin:0 0 12px;font-weight:500;white-space:nowrap;">PPT监控器 v1.1</h3>
<div style="margin-bottom:10px;white-space:nowrap;">
<button id="toggleMonitor" style="margin-right:8px;">启动监控</button>
<button id="manualCapture">手动截图</button>
</div>
<div style="margin-bottom:10px;white-space:nowrap;">
<label for="intervalInput">截图间隔 (s): </label>
<input type="number" id="intervalInput" value="${CONFIG.checkInterval / 1000}" min="1" style="width: 50px;">
</div>
<div style="margin-bottom:10px;white-space:nowrap;">
<label for="toleranceInput">差异比例 (%): </label>
<input type="number" id="toleranceInput" value="${CONFIG.pixelTolerance * 100}" min="1" max="100" style="width: 45px;">
</div>
<div class="expanded-status" style="font-size:13px;white-space:nowrap;">
<p style="color:#0cf;margin:0;">监控已停止</p>
</div>
</div>
<div class="collapsed-status" style="
position: absolute;
top: 50%;
left: 10px;
transform: translateY(-50%);
color: #0cf;
font-size: 12px;
white-space: nowrap;
">
<p style="margin:0;">已停止</p>
</div>
<div class="collapse-indicator" style="
position: absolute;
top: 50%;
right: 5px;
transform: translateY(-50%);
color: #fff;
font-size: 16px;
">▶</div>
`;
document.body.appendChild(ui);
// 鼠标交互
ui.addEventListener('mouseenter', () => {
ui.style.width = '160px';
ui.querySelector('.expanded-content').style.display = 'block';
ui.querySelector('.collapsed-status').style.display = 'none';
});
ui.addEventListener('mouseleave', () => {
ui.style.width = '50px';
ui.querySelector('.expanded-content').style.display = 'none';
ui.querySelector('.collapsed-status').style.display = 'block';
});
// 按钮事件
ui.querySelector('#toggleMonitor').addEventListener('click', toggleMonitoring);
ui.querySelector('#manualCapture').addEventListener('click', () => captureScreenshot('manual'));
ui.querySelector('#intervalInput').addEventListener('input', setIntervalTime);
ui.querySelector('#toleranceInput').addEventListener('input', setTolerance);
}
// 核心截图功能
async function captureScreenshot(source = 'auto') {
try {
const target = document.querySelector(CONFIG.targetSelector);
if (!target) throw new Error('PPT容器未找到');
// 等待元素渲染
await new Promise(resolve => setTimeout(resolve, 500));
const canvas = await html2canvas(target, {
useCORS: true,
scale: 2,
logging: false,
backgroundColor: '#FFFFFF',
onclone: (doc) => {
// 处理特殊元素
doc.querySelectorAll('video, audio').forEach(media => media.pause());
}
});
const timestamp = new Date().toISOString().replace(/[:T.]/g, '-').slice(0, 19);
const filename = `SEU-PPT_${timestamp}_${source}.png`;
const currentScreenshot = canvas.toDataURL('image/png');
// 检查是否重复
let isDuplicate = false;
const lastScreenshot = state.screenshotHistory[state.screenshotHistory.length - 1];
if (lastScreenshot && await compareImages(lastScreenshot, currentScreenshot)) {
isDuplicate = true;
}
if (!isDuplicate) {
const link = document.createElement('a');
link.href = currentScreenshot;
link.download = filename;
link.click();
state.screenshotHistory.push(currentScreenshot);
console.log(`截图成功: ${filename}`);
} else {
console.log(`重复截图，跳过: ${filename}`);
}
} catch (error) {
console.error('[PPT监控器] 错误:', error);
}
}
// 简单的图片对比函数
async function compareImages(image1, image2) {
if (!image1 || !image2) return false;
const canvas1 = document.createElement('canvas');
const ctx1 = canvas1.getContext('2d');
const img1 = new Image();
img1.src = image1;
await new Promise(resolve => img1.onload = resolve);
canvas1.width = img1.width;
canvas1.height = img1.height;
ctx1.drawImage(img1, 0, 0);
const canvas2 = document.createElement('canvas');
const ctx2 = canvas2.getContext('2d');
const img2 = new Image();
img2.src = image2;
await new Promise(resolve => img2.onload = resolve);
canvas2.width = img2.width;
canvas2.height = img2.height;
ctx2.drawImage(img2, 0, 0);
const data1 = ctx1.getImageData(0, 0, canvas1.width, canvas1.height).data;
const data2 = ctx2.getImageData(0, 0, canvas2.width, canvas2.height).data;
let differentPixelCount = 0;
for (let i = 0; i < data1.length/10; i++) {
if (data1[10 * i] !== data2[10 * i]) {
differentPixelCount++;
}
}
const totalPixelCount = data1.length / 10 / 4; // 每个像素由4个值（r, g, b, a）组成
const toleranceCount = totalPixelCount * CONFIG.pixelTolerance;
return differentPixelCount <= toleranceCount;
}
// 监控状态控制
function startMonitoring() {
const target = document.querySelector(CONFIG.targetSelector);
if (!target) {
updateStatus('error', 'PPT容器未找到');
return;
}
// 立即执行首次截图
captureScreenshot('auto');
state.intervalId = setInterval(() => {
if (state.isMonitoring) captureScreenshot('auto');
}, CONFIG.checkInterval);
state.isMonitoring = true;
updateStatus('monitoring');
document.querySelector('#toggleMonitor').textContent = '停止监控';
}
function stopMonitoring() {
clearInterval(state.intervalId);
state.isMonitoring = false;
updateStatus('stopped');
document.querySelector('#toggleMonitor').textContent = '启动监控';
}
function toggleMonitoring() {
state.isMonitoring ? stopMonitoring() : startMonitoring();
}
// 设置截图间隔
function setIntervalTime() {
const input = document.querySelector('#intervalInput');
const newInterval = parseInt(input.value) * 1000;
if (!isNaN(newInterval) && newInterval > 0) {
CONFIG.checkInterval = newInterval;
if (state.isMonitoring) {
stopMonitoring();
startMonitoring();
}
console.log(`截图间隔已设置为 ${newInterval / 1000} 秒`);
} else {
console.error('输入的间隔时间无效，请输入一个大于0的整数。');
}
}
// 设置像素容忍度
function setTolerance() {
const input = document.querySelector('#toleranceInput');
const newTolerance = parseFloat(input.value) / 100;
if (!isNaN(newTolerance) && newTolerance > 0 && newTolerance <= 1) {
CONFIG.pixelTolerance = newTolerance;
console.log(`像素容忍度已设置为 ${newTolerance * 100}%`);
} else {
console.error('输入的容忍度无效，请输入一个1到100之间的数字。');
}
}
// 状态显示更新
function updateStatus(type, message) {
const elements = {
expanded: document.querySelector('.expanded-status p'),
collapsed: document.querySelector('.collapsed-status p')
};
const statusMap = {
monitoring: {
expanded: '监控中...',
collapsed: '已开启',
color: '#0cf'
},
stopped: {
expanded: '监控已停止',
collapsed: '已停止',
color: '#0cf'
},
error: {
expanded: '错误: ' + message,
collapsed: '错误',
color: '#f00'
}
};
const status = statusMap[type] || {
expanded: '未知状态',
collapsed: '未知',
color: '#0cf'
};
elements.expanded.textContent = status.expanded;
elements.expanded.style.color = status.color;
elements.collapsed.textContent = status.collapsed;
elements.collapsed.style.color = status.color;
}
// 启动流程
window.addEventListener('load', () => {
initUI();
});
// 离开页面提醒
window.addEventListener('beforeunload', () => {
if (state.isMonitoring) {
return '截图进程正在进行中，确定要离开吗？';
}
});
})();
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