nixos-configs/config/ags/js/bar/workspaces.js

// https://github.com/Aylur/dotfiles/blob/f03e58ba0d3b56f1144631c179ab27357e466753/.config/ags/modules/hyprland.js#L4
import Gdk from 'gi://Gdk';
const display = Gdk.Display.get_default();
const { App } = ags;
const { Hyprland, Applications } = ags.Service;
const { execAsync, lookUpIcon } = ags.Utils;
const { Box, Button, EventBox, Label, Icon } = ags.Widget;

export const Workspace = ({ i, } = {}) =>
ags.Widget.Revealer({
  transition: "slide_right",
  child: EventBox({
    onPrimaryClickRelease: () => execAsync(`hyprctl dispatch workspace ${i}`).catch(print),
    onHover: box => {
      box.window.set_cursor(Gdk.Cursor.new_from_name(display, 'pointer'));
    },
    onHoverLost: box => {
      box.window.set_cursor(null);
    },
    child: Box({
      className: 'button',
      child: Label(`${i}`),
      connections: [
        [Hyprland, btn => {
          const { workspaces, active } = Hyprland;
          const occupied = workspaces.has(i) && workspaces.get(i).windows > 0;
          btn.toggleClassName('active', active.workspace.id === i);
          btn.toggleClassName('occupied', occupied);
          btn.toggleClassName('empty', !occupied);
        }]
      ],
    }),
  }),
});

var prev = Hyprland.active.workspace.id;

export const Workspaces = props => Box({
  className: 'workspaces panel-button',
  children: [EventBox({
    child: Box({
      connections: [[Hyprland, box => {
        let workspaces = [];

        new Promise(resolve => {

          Hyprland.workspaces.forEach(ws => {
            if (ws.id > 0) workspaces.push(ws);
          });

          resolve();
        }).then(value => {

          box.children.forEach(rev => rev.reveal_child = false);
          workspaces.forEach(ws => {
            box.children[ws.id - 1].reveal_child = true;
          });

        });
      }]],
      children: Array.from({ length: 15 }, (_, i) => i + 1).map(i => Workspace({ i: i})),
    }),
  })],
});