feat(ags): add brightness widget

config/ags/js/bar/bar.js

@@ -11,6 +11,7 @@ import { NotifButton }    from './notif-button.js';
 import { Clock }          from './clock.js';
 import { SysTray }        from './systray.js';
 import { Batt }           from './battery.js';
+import { Brightness }     from './brightness.js';
 
 export const Bar = Window({
   name: 'bar',
@@ -44,6 +45,10 @@ export const Bar = Window({
 
         Separator(12),
 
+        Brightness,
+
+        Separator(12),
+
         Workspaces,
 
       ],

config/ags/js/bar/brightness.js

@@ -0,0 +1,36 @@
+const { Label, Icon, Stack, ProgressBar, Overlay, Box } = ags.Widget;
+import { Separator } from '../common.js';
+const { exec } = ags.Utils;
+
+const Indicator = props => Label({
+  ...props,
+  label: '',
+  connections: [[500, icon => {
+    const br = `${exec('brightnessctl get')}`;
+         if (br <= 3) icon.label = "";
+    else if (br <= 38) icon.label = "";
+    else if (br <= 77) icon.label = "";
+    else if (br <= 115) icon.label = "";
+    else if (br <= 153) icon.label = "";
+    else if (br <= 191) icon.label = "";
+    else if (br <= 230) icon.label = "";
+                   else icon.label = "";
+  }]],
+});
+
+const LevelLabel = props => Label({
+  ...props,
+  className: 'label',
+  connections: [[500, label => label.label = `${Math.floor(exec('brightnessctl get') / 2.55)}%`]],
+});
+
+const BrightnessModule = () => Box({
+  className: 'toggle-off battery',
+  children: [
+    Indicator(),
+    Separator(12),
+    LevelLabel(),
+  ],
+});
+
+export const Brightness = BrightnessModule();