quickshell lets gooo

dots/quickshell/services/Brightness.qml

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+pragma Singleton
+pragma ComponentBehavior: Bound
+
+import "root:/widgets"
+import Quickshell
+import Quickshell.Io
+import QtQuick
+
+Singleton {
+    id: root
+
+    property list<var> ddcMonitors: []
+    readonly property list<Monitor> monitors: variants.instances
+
+    function getMonitorForScreen(screen: ShellScreen): var {
+        return monitors.find(m => m.modelData === screen);
+    }
+
+    function increaseBrightness(): void {
+        const focusedName = Hyprland.focusedMonitor.name;
+        const monitor = monitors.find(m => focusedName === m.modelData.name);
+        if (monitor)
+            monitor.setBrightness(monitor.brightness + 0.1);
+    }
+
+    function decreaseBrightness(): void {
+        const focusedName = Hyprland.focusedMonitor.name;
+        const monitor = monitors.find(m => focusedName === m.modelData.name);
+        if (monitor)
+            monitor.setBrightness(monitor.brightness - 0.1);
+    }
+
+    reloadableId: "brightness"
+
+    onMonitorsChanged: {
+        ddcMonitors = [];
+        ddcProc.running = true;
+    }
+
+    Variants {
+        id: variants
+
+        model: Quickshell.screens
+
+        Monitor {}
+    }
+
+    Process {
+        id: ddcProc
+
+        command: ["ddcutil", "detect", "--brief"]
+        stdout: StdioCollector {
+            onStreamFinished: root.ddcMonitors = text.trim().split("\n\n").filter(d => d.startsWith("Display ")).map(d => ({
+                        model: d.match(/Monitor:.*:(.*):.*/)[1],
+                        busNum: d.match(/I2C bus:[ ]*\/dev\/i2c-([0-9]+)/)[1]
+                    }))
+        }
+    }
+
+    Process {
+        id: setProc
+    }
+
+    CustomShortcut {
+        name: "brightnessUp"
+        onPressed: root.increaseBrightness()
+    }
+
+    CustomShortcut {
+        name: "brightnessDown"
+        onPressed: root.decreaseBrightness()
+    }
+
+    component Monitor: QtObject {
+        id: monitor
+
+        required property ShellScreen modelData
+        readonly property bool isDdc: root.ddcMonitors.some(m => m.model === modelData.model)
+        readonly property string busNum: root.ddcMonitors.find(m => m.model === modelData.model)?.busNum ?? ""
+        property real brightness
+
+        readonly property Process initProc: Process {
+            stdout: StdioCollector {
+                onStreamFinished: {
+                    const [, , , current, max] = text.split(" ");
+                    monitor.brightness = parseInt(current) / parseInt(max);
+                }
+            }
+        }
+
+        function setBrightness(value: real): void {
+            value = Math.max(0, Math.min(1, value));
+            const rounded = Math.round(value * 100);
+            if (Math.round(brightness * 100) === rounded)
+                return;
+            brightness = value;
+            setProc.command = isDdc ? ["ddcutil", "-b", busNum, "setvcp", "10", rounded] : ["brightnessctl", "s", `${rounded}%`];
+            setProc.startDetached();
+        }
+
+        onBusNumChanged: {
+            initProc.command = isDdc ? ["ddcutil", "-b", busNum, "getvcp", "10", "--brief"] : ["sh", "-c", `echo "a b c $(brightnessctl g) $(brightnessctl m)"`];
+            initProc.running = true;
+        }
+
+        Component.onCompleted: {
+            initProc.command = isDdc ? ["ddcutil", "-b", busNum, "getvcp", "10", "--brief"] : ["sh", "-c", `echo "a b c $(brightnessctl g) $(brightnessctl m)"`];
+            initProc.running = true;
+        }
+    }
+}