From ae9a80c1f012686c1f65fce7ce76fdd1b77b0b71 Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Wed, 23 Sep 2026 21:08:35 +0200
Subject: ...

---
 .../shell/quickshell/Services/Brightness.qml       | 107 +++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 accounts/gkleen@skadhi/shell/quickshell/Services/Brightness.qml

(limited to 'accounts/gkleen@skadhi/shell/quickshell/Services/Brightness.qml')

diff --git a/accounts/gkleen@skadhi/shell/quickshell/Services/Brightness.qml b/accounts/gkleen@skadhi/shell/quickshell/Services/Brightness.qml
new file mode 100644
index 00000000..f3ae6804
--- /dev/null
+++ b/accounts/gkleen@skadhi/shell/quickshell/Services/Brightness.qml
@@ -0,0 +1,107 @@
+pragma Singleton
+
+import QtQml
+import Quickshell
+import Quickshell.Io
+import Custom as Custom
+import qs.Services
+
+Singleton {
+  id: root
+
+  property string subsystem: "backlight"
+  property string device: "intel_backlight"
+
+  property real currBrightness
+  property real exponent: 4
+
+  function calcCurrBrightness() {
+    if (!currFile.loaded || !maxFile.loaded)
+      return undefined;
+    const curr = Number(currFile.text());
+    const max = Number(maxFile.text());
+    const val = Math.pow(curr / max, 1 / root.exponent);
+    return val;
+  }
+
+  Connections {
+    target: currFile
+    function onLoaded() {
+      const b = root.calcCurrBrightness();
+      if (typeof b !== 'undefined')
+        root.currBrightness = b;
+    }
+  }
+  Connections {
+    target: maxFile
+    function onLoaded() {
+      const b = root.calcCurrBrightness();
+      if (typeof b !== 'undefined')
+        root.currBrightness = b;
+    }
+  }
+
+  onCurrBrightnessChanged: {
+    root.currBrightness = Math.max(0, Math.min(1, root.currBrightness));
+
+    const prev = root.calcCurrBrightness();
+    if (typeof prev === 'undefined' || Math.abs(root.currBrightness - prev) < 0.01)
+      return;
+
+    const max = Number(maxFile.text());
+    const actual = Number(currFile.text());
+    let curr = Math.max(0, Math.min(max, Math.pow(root.currBrightness, root.exponent) * max));
+    if (Math.round(curr) == actual && curr < actual)
+      curr = Math.max(0, actual - 1);
+    else if (Math.round(curr) == actual && curr > actual)
+      curr = Math.min(max, actual + 1);
+    // root.currBrightness = Math.pow(curr / max, 1 / root.exponent);
+    Custom.Systemd.setBrightness(root.subsystem, root.device, Math.round(curr));
+  }
+
+  FileView {
+    id: currFile
+    path: `/sys/class/${root.subsystem}/${root.device}/brightness`
+    blockAllReads: true
+    watchChanges: true
+    onFileChanged: reload()
+  }
+  FileView {
+    id: maxFile
+    path: `/sys/class/${root.subsystem}/${root.device}/max_brightness`
+    blockAllReads: true
+    watchChanges: true
+    onFileChanged: reload()
+  }
+
+
+  Timer {
+    id: startupDelay
+    interval: 500
+    running: true
+    repeat: false
+  }
+  property bool onlyInternal: true
+  Connections {
+    target: NiriService
+    function onOutputsChanged() {
+      root.onlyInternal = Object.keys(NiriService.outputs).every(oname => oname == "eDP-1");
+    }
+  }
+  onOnlyInternalChanged: {
+    if (startupDelay.running)
+      return;
+
+    if (!root.onlyInternal)
+      root.currBrightness = 1
+  }
+
+
+  IpcHandler {
+    target: "Brightness"
+
+    function set(brightness: real): void {
+      root.currBrightness = brightness;
+    }
+  }
+}
-- 
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