AutoScroll - Automatically scroll down the page, supporting hotkey control switches and speed adjustment (自动向下滚动页面，支持热键控制开关和速度调节)
// ==UserScript==
// @name AutoScroll2
// @description AutoScroll - Automatically scroll down the page, supporting hotkey control switches and speed adjustment (自动向下滚动页面，支持热键控制开关和速度调节)
// @include http*
// @version 1.0.2
// @author Eilen https://github.com/EilenC
// @grant none
// @namespace https://greatest.deepsurf.us/users/319354
// @supportURL https://github.com/EilenC/Tampermonkey-Scripts/blob/master/AutoScroll2/AutoScroll2.js
// ==/UserScript==
(function (document) {
'use strict';
function roundToTwoDecimalPlaces(number) {
return Number(number.toFixed(2));
}
let notificationTimer = null;
let notification = document.createElement('div');
let tipsTime = 300;
function showNotification(message, duration) {
clearTimeout(notificationTimer);
notification.textContent = message;
notification.style.position = 'fixed';
notification.style.top = '50%';
notification.style.left = '50%';
notification.style.transform = 'translate(-50%, -50%)';
notification.style.background = 'black';
notification.style.color = 'white';
notification.style.fontWeight = 'bold';
notification.style.fontSize = '40px';
notification.style.padding = '20px';
notification.style.borderRadius = '10px';
notification.style.zIndex = '9999';
document.body.appendChild(notification);
notificationTimer = setTimeout(function () {
document.body.removeChild(notification);
notificationTimer = null;
}, duration);
}
let scrollY = 0;
let scrollSpeed = 0.5; // 默认滚动速度
let isScrolling = false;
let lastScrollTime = performance.now();
const targetFrameDelay = 1000 / 60; // 目标帧率为每秒 60 帧
let animationFrameId = null;
function scrollAnimation(currentTime) {
if (isScrolling) {
const elapsedTime = currentTime - lastScrollTime;
if (elapsedTime >= targetFrameDelay) {
const deltaScroll = scrollSpeed * (elapsedTime / targetFrameDelay);
scrollY += deltaScroll;
window.scrollTo(0, scrollY);
lastScrollTime = currentTime;
}
animationFrameId = requestAnimationFrame(scrollAnimation);
} else {
cancelAnimationFrame(animationFrameId);
animationFrameId = null;
}
}
// 开始滚动
function startScroll() {
isScrolling = true;
scrollY = window.scrollY || document.documentElement.scrollTop;
lastScrollTime = performance.now();
animationFrameId = requestAnimationFrame(scrollAnimation);
}
// 停止滚动
function stopScroll() {
isScrolling = false;
if (animationFrameId !== null) {
cancelAnimationFrame(animationFrameId);
animationFrameId = null;
}
scrollY = 0; // 清空滚动位置
lastScrollTime = 0; // 重置上次滚动时间
}
let lastKeyDownTime = 0;
let keyDownCount = 0;
// 键盘事件处理
document.addEventListener('keydown', (event) => {
let currentTime = new Date().getTime();
switch (event.key) {
case 's':
case 'ArrowLeft':
if(isScrolling){
let step = 0.01
if (scrollSpeed > 2) {
step = 0.1
}
scrollSpeed = Math.max(scrollSpeed - step, 0.01);
showNotification('AutoScroll:Speed: ' + roundToTwoDecimalPlaces(scrollSpeed), tipsTime);
}
break;
case 'a':
case 'ArrowRight':
if(isScrolling){
scrollSpeed = Math.min(scrollSpeed + 0.1, 99);
showNotification('AutoScroll:Speed: ' + roundToTwoDecimalPlaces(scrollSpeed), tipsTime);
}
break;
case "`":
if (currentTime - lastKeyDownTime < 300) {
keyDownCount++;
} else {
keyDownCount = 1;
}
lastKeyDownTime = currentTime;
if (keyDownCount === 2) {
if (isScrolling) {
stopScroll();
showNotification('AutoScroll:Off', tipsTime);
} else {
startScroll();
showNotification('AutoScroll:On', tipsTime);
}
keyDownCount = 0;
}
break;
}
});
})(document);