1 files changed, 64 insertions, 0 deletions
diff --git a/js/ui/status/brightness.js b/js/ui/status/brightness.js
new file mode 100644
index 0000000..4c0da67
--- /dev/null
+++ b/js/ui/status/brightness.js
@@ -0,0 +1,64 @@
+// -*- mode: js; js-indent-level: 4; indent-tabs-mode: nil -*-
+/* exported Indicator */
+
+const {Gio, GObject} = imports.gi;
+
+const {QuickSlider, SystemIndicator} = imports.ui.quickSettings;
+
+const {loadInterfaceXML} = imports.misc.fileUtils;
+
+const BUS_NAME = 'org.gnome.SettingsDaemon.Power';
+const OBJECT_PATH = '/org/gnome/SettingsDaemon/Power';
+
+const BrightnessInterface = loadInterfaceXML('org.gnome.SettingsDaemon.Power.Screen');
+const BrightnessProxy = Gio.DBusProxy.makeProxyWrapper(BrightnessInterface);
+
+const BrightnessItem = GObject.registerClass(
+class BrightnessItem extends QuickSlider {
+    _init() {
+        super._init({
+            iconName: 'display-brightness-symbolic',
+        });
+
+        this._proxy = new BrightnessProxy(Gio.DBus.session, BUS_NAME, OBJECT_PATH,
+            (proxy, error) => {
+                if (error)
+                    console.error(error.message);
+                else
+                    this._proxy.connect('g-properties-changed', () => this._sync());
+                this._sync();
+            });
+
+        this._sliderChangedId = this.slider.connect('notify::value',
+            this._sliderChanged.bind(this));
+        this.slider.accessible_name = _('Brightness');
+    }
+
+    _sliderChanged() {
+        const percent = this.slider.value * 100;
+        this._proxy.Brightness = percent;
+    }
+
+    _changeSlider(value) {
+        this.slider.block_signal_handler(this._sliderChangedId);
+        this.slider.value = value;
+        this.slider.unblock_signal_handler(this._sliderChangedId);
+    }
+
+    _sync() {
+        const brightness = this._proxy.Brightness;
+        const visible = Number.isInteger(brightness) && brightness >= 0;
+        this.visible = visible;
+        if (visible)
+            this._changeSlider(this._proxy.Brightness / 100.0);
+    }
+});
+
+var Indicator = GObject.registerClass(
+class Indicator extends SystemIndicator {
+    _init() {
+        super._init();
+
+        this.quickSettingsItems.push(new BrightnessItem());
+    }
+});