Merge pull request 'add brightness service and slider' (#2) from niri into v3

Reviewed-on: #2

services/brightness/__init__.py

@@ -0,0 +1,52 @@
+from astal import read_file, write_file, gi
+
+gi.require_version("GObject", "2.0")
+gi.require_version("GUdev", "1.0")
+from gi.repository import GObject, GUdev, GLib
+
+class Brightness(GObject.Object):
+    _brightness: float = 0 
+
+    def __init__(self, device: str):
+        super().__init__()
+
+        self._device_name = device
+        self._udev_client = GUdev.Client.new(["backlight"])
+        self._udev_client.connect('uevent', self.on_uevent)
+
+    def on_uevent(self, client, action, device):
+        if device.get_name() != self._device_name:
+            return
+
+        self._brightness = self._get_brightness()
+        self.notify('brightness')
+
+    def _get_brightness(self):
+        return self._get_current_brightness() / self._get_max_brightness()
+
+    def _get_current_brightness(self):
+        return int(read_file(f"/sys/class/backlight/{self._device_name}/brightness"))
+
+    def _get_max_brightness(self):
+        return int(read_file(f"/sys/class/backlight/{self._device_name}/max_brightness"))
+
+    @GObject.Property(type=float)
+    def brightness(self):
+        return self._brightness
+
+    @brightness.setter
+    def brightness(self, value: float):
+        if value < 0:
+            value = 0
+
+        elif value > 1:
+            value = 1
+
+        self._brightness = value
+        GLib.file_set_contents_full(f"/sys/class/backlight/{self._device_name}/brightness", bytes(str(round(self._brightness * self._get_max_brightness())), 'utf-8'), GLib.FileSetContentsFlags.ONLY_EXISTING, 0o666)
+
+    def get_brightness(self):
+        return self._brightness
+
+    def set_brightness(self, value):
+        self.brightness = value

style/style.css.map

@@ -1 +0,0 @@
-{"version":3,"sourceRoot":"","sources":["style.scss","widgets/bar.scss","colors.scss","mixins.scss","widgets/notifications.scss"],"names":[],"mappings":"AAAA;EACE;;;ACCF;EACE;;;AAKE;EACE,YATG;EAUH,YCVD;EDWC;EACA;;AAEA;EACE;EACA;EACA;EACA,kBCjBG;;ADmBH;EACE,kBCnBC;;ADsBH;EACE,kBCnBL;;ADyBD;EACE;EACA;EACA;EACA;EACA;;AAGE;EACE;;AAIJ;EACE;EACA;EACA;;AAEA;EACE;EACA,YClDC;;ADqDH;EACE;EACA,YC/Ba;;ADqCrB;EACE,YA/DK;EAgEL,YChEC;;ADkED;EACE;;AAEE;EACE;EACA;;AAGF;EACE;EACA;;AAEA;EACE;EACA;EACA,YChFD;;ADmFD;EACE,YC9ED;;ADoFP;EACE;EACA;;AACA;EACE;EACA;EE/FN,ODYgB;ECXhB,kBDYgB;ECXhB,QAY0B;EAX1B,SAW+B;EAV/B,WAUoC;;AARpC;EACE;EACA,WAMuC;EALvC;;AF2FA;EACE,YCrGK;EDsGL;EACA;EACA;;AAGF;EACE;EACA,YC9GD;;ADgHC;EACE;EACA;;;AGhHJ;EACE;EACA;EACA,YFLD;;AEOC;EACE;EACA;EACA;;AAGF;EACE;EACA;EACA;EACA;;AAGF;EACE,YFpBG;;AEsBH;EACE;EACA,kBFlBC;;AEsBL;EACE;;AAEA;EACE,YFzBC;;AE4BH;EACE,YF/BL","file":"style.css"}

style/widgets/bar.scss

@@ -68,7 +68,7 @@ centerbox {
       margin: 5px;
       box.volume-slider {
         > button {
-          font-size: 20px; 
+          font-size: 24px; 
           margin: 5px;
         }
         
@@ -87,6 +87,28 @@ centerbox {
           }
         }
       }
+
+      box.brightness-slider {
+        > button {
+          font-size: 20px; 
+          margin: 5px;
+        }
+        
+        > .brightness-slider { /* selecting this as `slider` doesn't work, for some reason.*/
+          min-width: 120px;
+          min-height: 10px;
+
+          & trough {
+            min-height: 10px;
+            min-width: 120px;
+            background: $bg-alt-1;
+          }
+
+          & highlight {
+            background: $hl-alt-1;
+          }
+        }
+      }
     }
 
     .battery-container {

widgets/bar/__init__.hy

@@ -6,6 +6,7 @@
 (import .clock [clock])
 (import .battery [battery-dial])
 (import .volume [volume])
+(import .brightness [brightness])
 
 (setv bar (Widget.Window
   :namespace "bar"
@@ -26,7 +27,8 @@
           :class-name "sliders"
           :vertical True
           :children [
-            volume])
+            volume
+            brightness])
         battery-dial
         ((astalify Gtk.Separator))
         clock]))))

widgets/bar/brightness.hy

@@ -0,0 +1,22 @@
+(import astal *)
+(import astal.gtk3 *)
+(import services.brightness [Brightness])
+(import math [floor])
+
+(import gi.repository [AstalWp])
+
+(let [
+  backlight (Brightness "amdgpu_bl1")]
+  (setv brightness (Widget.Box
+    :class-name "brightness-slider"
+    :children [
+      (Widget.Button
+        :child (Widget.Icon :icon (bind backlight "brightness" (fn [brightness]
+          f"display-brightness-{(get ["off" "low" "medium" "high" "high"] (floor (/ (* brightness 100) 25)))}-symbolic"))))
+      (Widget.Slider
+        :class-name "brightness-slider"
+        :hexpand True
+        :draw-value False
+        :value (bind backlight "brightness")
+        :on-dragged (fn [self] 
+          (. backlight (set-brightness (.get-value self)))))])))