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Custom scrolling distance
// ==UserScript==
// @name Custom scrolling distance of space key
// @version 0.1.0
// @description Custom scrolling distance
// @author pana
// @namespace https://greasyfork.org/zh-CN/users/193133-pana
// @license GNU General Public License v3.0 or later
// @match *://*/*
// @grant GM_getValue
// @grant GM_setValue
// @grant GM_registerMenuCommand
// ==/UserScript==
(function () {
const store = {
distancePercentage: GM_getValue('distancePercentage', 100)
};
function configPanel() {
const panel = document.createElement('div');
panel.setAttribute('style', 'position: fixed; top: 0; right: 0; bottom: 0; left: 0; display: flex; background-color: rgba(0, 0, 0, 0.5); align-items: center; justify-content: center; z-index: 100000;');
panel.innerHTML = `
<div style="position: relative; border-radius: 12px; display: flex; flex-direction: column; box-shadow: 0 1px 10px rgba(0, 0, 0, 0.8); background-color: rgb(21, 32, 43); border: 1px solid #000; color: #fff;">
<div style="margin: 20px 15px; text-align: center; font-size: 1.2em; font-weight: bold;">Settings</div>
<div style="margin: 0px 10px;">
<label>Scrolling distance:</label>
<input id="custom-space-scroll-input" type="number" min="1" max="100" value="${store.distancePercentage}" style="width: 50px" /> %
</div>
<div style="display: inline-block; margin: 15px 15px; text-align: right;">
<button id="custom-space-scroll-cancel-btn" style="cursor: pointer;">Cancel</button>
<button id="custom-space-scroll-ok-btn" style="cursor: pointer; margin-left: 10px;">OK</button>
</div>
</div>
`;
document.body.appendChild(panel);
panel.addEventListener('click', evt => {
if (evt.target === panel) {
panel.remove();
}
});
const okBtn = document.getElementById('custom-space-scroll-ok-btn');
const cancelBtn = document.getElementById('custom-space-scroll-cancel-btn');
cancelBtn?.addEventListener('click', e => {
e.stopPropagation();
panel.remove();
});
okBtn?.addEventListener('click', e => {
e.stopPropagation();
const input = document.querySelector('#custom-space-scroll-input');
if (input) {
const value = input.value;
let res = parseInt(value) || 100;
if (res < 1 && res > 100) {
res = 100;
}
store.distancePercentage = res;
GM_setValue('distancePercentage', res);
}
panel.remove();
});
}
function main() {
GM_registerMenuCommand('Configuration', configPanel);
window.addEventListener('keydown', evt => {
if (evt.code === 'Space' && evt.target === document.body) {
evt.preventDefault();
const shiftState = evt.shiftKey;
const curTop = document.documentElement.scrollTop || document.body.scrollTop;
const curHeight = window.innerHeight;
const base = Math.round(curHeight * store.distancePercentage / 100);
const to = shiftState ? curTop - base : curTop + base;
document.documentElement.scrollTo({
top: to,
behavior: 'smooth'
});
}
});
}
main();
})();