feat: add astal status bar

astal/widget/cpu.ts

@@ -0,0 +1,46 @@
+import { GLib, Variable } from "astal";
+import GTop from "gi://GTop";
+
+type Snapshot = {
+  total: number;
+  user: number;
+  sys: number;
+  idle: number;
+};
+
+export function get_cpu_snapshot() {
+  const cpu = new GTop.glibtop_cpu();
+  GTop.glibtop_get_cpu(cpu);
+  return {
+    total: cpu.total,
+    user: cpu.user + cpu.nice,
+    sys: cpu.sys,
+    idle: cpu.idle,
+  };
+}
+
+export function calc_cpu_usage(a: Snapshot, b: Snapshot) {
+  const total_diff = b.total - a.total;
+  const active_diff = b.user + b.sys - (a.user + a.sys);
+  return Math.round(total_diff > 0 ? (100 * active_diff) / total_diff : 0);
+}
+
+export function get_ram_info() {
+  const mem = new GTop.glibtop_mem();
+  GTop.glibtop_get_mem(mem);
+  return {
+    total: mem.total,
+    used: mem.total - mem.free - mem.cached - mem.buffer,
+    free: mem.free,
+  };
+}
+
+export function get_disk_space() {
+  const usage = new GTop.glibtop_fsusage();
+  GTop.glibtop_get_fsusage(usage, "/");
+
+  const free_bytes = usage.bavail * usage.block_size;
+  const free_gib = free_bytes / 1024 ** 3;
+
+  return free_gib.toFixed(2);
+}