// ==UserScript==
// @name Scroll by mouse drag
// @namespace FawayTT
// @description Scroll the page while holding chosen mouse button anywhere on the website
// @match *://*/*
// @version 1.2
// @author FawayTT
// @license MIT
// @homepage https://github.com/FawayTT/userscripts
// @require https://openuserjs.org/src/libs/sizzle/GM_config.js
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// @grant GM_openInTab
// ==/UserScript==
GM_registerMenuCommand('Settings', opencfg);
const configcss = `height: 40rem;
width: 35rem;
border-radius: 10px;
z-index: 9999999;
position: fixed;
`;
const defaults = {
touchArea: `width: 100%;
height: 100%;
position: fixed;
left: 50%;
top: 0;
pointer-events: none;
transform: translateX(-50%);`,
};
let gmc = new GM_config({
id: 'config',
title: 'Scroll by mouse drag settings',
fields: {
scrollButton: {
section: ['Behavior'],
label: 'Scroll button',
labelPos: 'left',
type: 'select',
default: 'Left', // Default value for Blue
options: ['Left', 'Right', 'MiddleClick'],
},
touchArea: {
label: 'Touchpad zone position custom CSS (by default, its invisible and centered in the middle of the page)',
labelPos: 'left',
type: 'textarea',
default: defaults.touchArea,
},
msClick: {
label: 'Number of ms before scroll starts',
labelPos: 'left',
type: 'number',
default: 100,
},
textSelectable: {
label: 'Turn off when selecting text',
labelPos: 'right',
type: 'checkbox',
default: true,
},
scrollSpeed: {
section: ['Speed'],
label: 'Speed of scroll',
labelPos: 'left',
type: 'number',
default: 1.5,
},
blacklistedSites: {
section: ['Sites'],
label: 'Blacklisted sites (separated by comma)',
labelPos: 'right',
type: 'text',
default: '',
},
whitelistEnabled: {
label: 'Whitelist enabled',
labelPos: 'right',
type: 'checkbox',
default: false,
},
whitelistedSites: {
label: 'Whitelisted sites (separated by comma)',
labelPos: 'right',
type: 'text',
default: '',
},
url: {
section: ['Support'],
label: 'https://github.com/FawayTT/userscripts',
type: 'button',
click: () => {
GM_openInTab('https://github.com/FawayTT/userscripts');
},
},
},
events: {
save: function () {
gmc.close();
},
init: onInit,
},
});
const scrollDiv = document.createElement('div');
let animationDuration = 100;
let isMouseDown = false;
let startY = 0;
let startX = 0;
let startTimeout;
let distance = 0;
let isScrolling;
let clicks = 0;
let textSelectable;
let button;
let msClick;
let scrollSpeed = 1.5;
const animateScroll = (distance) => {
const startTime = performance.now();
const startScrollY = window.scrollY;
let extraScroll = true;
const scroll = (timestamp) => {
const elapsedTime = timestamp - startTime;
const progress = Math.min(elapsedTime / animationDuration, 1);
const scrollAmount = startScrollY + distance * progress;
if (window.scrollY < 50 && distance < 0) {
return;
}
window.scrollTo(0, Math.abs(scrollAmount));
if (progress < 1) {
requestAnimationFrame(scroll);
} else {
isScrolling = false;
if (extraScroll) {
extraScroll = false;
window.scrollBy({ top: distance * 0.5, behavior: 'smooth' });
}
}
};
requestAnimationFrame(scroll);
};
function onInit() {
const whitelistEnabled = gmc.get('whitelistEnabled');
const blacklistedSites = gmc.get('blacklistedSites');
const whitelistedSites = gmc.get('whitelistedSites');
button = gmc.get('scrollButton');
textSelectable = gmc.get('textSelectable');
msClick = gmc.get('msClick');
scrollSpeed = gmc.get('scrollSpeed');
switch (button) {
case 'Left':
button = 0;
break;
case 'Right':
button = 2;
break;
default:
button = 1;
break;
}
if (whitelistEnabled) {
if (whitelistedSites.length > 0) {
const whitelistedSitesArray = whitelistedSites.split(',').map((site) => site.trim());
const currentSite = window.location.href;
if (whitelistedSitesArray.includes(currentSite)) init();
}
} else {
if (blacklistedSites.length > 0) {
const blacklistedSitesArray = blacklistedSites.split(',').map((site) => site.trim());
const currentSite = window.location.href;
if (!blacklistedSitesArray.includes(currentSite)) init();
} else init();
}
}
function opencfg() {
gmc.open();
config.style = configcss;
}
const pauseEvent = (e) => {
if (e.stopPropagation) e.stopPropagation();
if (e.preventDefault) e.preventDefault();
e.cancelBubble = true;
e.returnValue = false;
return false;
};
const getScrollValue = (value) => {
return value * scrollSpeed;
};
const reset = () => {
if (isMouseDown) {
document.body.style.cursor = null;
}
isMouseDown = false;
isScrolling = false;
clearTimeout(startTimeout);
};
const checkScroll = (e) => {
const rect = scrollDiv.getBoundingClientRect();
const scrollDivX = rect.left + window.scrollX;
clearTimeout(startTimeout);
if (e.button === button && e.pageX >= scrollDivX && e.pageX <= scrollDivX + rect.width) {
if (button !== 0) e.preventDefault();
startTimeout = setTimeout(() => {
isMouseDown = true;
startY = e.clientY;
startX = e.clientX;
document.body.style.setProperty('cursor', 'grabbing');
}, msClick);
}
};
const scroll = (e) => {
if (isMouseDown && e.buttons & (1 === 1)) pauseEvent(e);
if (isScrolling || !isMouseDown) return;
if (window.getSelection().toString().length > 0 || (textSelectable && Math.abs(startX - e.clientX) > 50)) {
reset();
return;
}
distance = -(startY - e.clientY);
isScrolling = true;
distance = getScrollValue(distance);
animateScroll(distance);
};
function init() {
scrollDiv.style.cssText = gmc.get('touchArea');
document.body.appendChild(scrollDiv);
document.addEventListener(
'contextmenu',
(e) => {
if (button === 2 && !doubleClick) e.preventDefault();
},
false
);
document.addEventListener('mousedown', checkScroll);
document.addEventListener('mouseup', reset);
document.addEventListener('mousemove', scroll);
}
