MouseTab - Tab the mouse pointer netween monitors

MouseTab.mjs

#!/usr/bin/node
// @ts-check
import { execSync } from "child_process";

function getScreens() {
  const screen_pattern = "([0-9]+)x([0-9]+)\\+([0-9]+)\\+([0-9]+)";
  const screen_regexp = new RegExp(screen_pattern, "gm");
  const screen_lines = execSync(
    `xrandr --current | grep -oP "${screen_pattern}"`,
    {
      encoding: "utf-8",
    }
  ).trim();

  /**
   * @type {{x:number;y:number;w:number;h:number}[]}
   */
  const screens = [];

  /**
   * @type {RegExpExecArray}
   */
  let match;
  while ((match = screen_regexp.exec(screen_lines))) {
    const w = +match[1];
    const h = +match[2];
    const x = +match[3];
    const y = +match[4];
    screens.push({ x, y, w, h });
  }

  screens.sort((a, b) => a.x - b.x || a.y - b.y);

  return screens;
}

function getMouseLocation() {
  const pointer_pattern = "x:([0-9]+) y:([0-9]+)";
  const pointer_regexp = new RegExp(pointer_pattern);
  const pointer = execSync(
    `xdotool getmouselocation | grep -oP "${pointer_pattern}"`,
    {
      encoding: "utf-8",
    }
  ).trim();

  const match = pointer.match(pointer_regexp);
  const x = +match[1];
  const y = +match[2];

  return { x, y };
}

function main() {
  const screens = getScreens();
  const total = screens.length;
  const { x, y } = getMouseLocation();
  const index = screens.findIndex(
    (scr) => scr.x <= x && scr.x + scr.w > x && scr.y <= y && scr.y + scr.h > y
  );
  const active = screens[index];
  const rx = (x - active.x) / active.w;
  const ry = (y - active.y) / active.h;
  const next = screens[index + 1 >= total ? 0 : index + 1];

  const nx = Math.floor(next.x + next.w * rx);
  const ny = Math.floor(next.y + next.h * ry);

  if (next) {
    const cursor = `find-cursor --size 200 --distance 10 --wait 80 --line-width 3 --color red -f`;
    execSync(`xdotool mousemove ${nx} ${ny} && ${cursor}`);
  }
}

main();

Install Dependencies

yay -S xdotool xorg-xrandr find-cursor --noconfirm