🔧 chore(modules/backlight): better implementation

src/modules/backlight.ts

@@ -1,92 +1,46 @@
-import { monitorFile, readFile, writeFile } from "ags/file";
+import { monitorFile, readFile } from "ags/file";
-import GObject, { getter, ParamSpec, register, setter, signal } from "ags/gobject";
+import { exec } from "ags/process";
+import GObject, { getter, ParamSpec, setter, signal } from "ags/gobject";
+
 import Gio from "gi://Gio?version=2.0";
 
 
-export { Backlight };
+export namespace Backlights {
-@register({ GTypeName: "Backlight" })
-class Backlight extends GObject.Object {
 
-    private static _backlights: Array<Backlight> = [];
+    let instance: Backlights;
-    public static get backlights() {
-        return this._backlights;
-    };
     
-    private static default: Backlight;
+    export function getDefault(): Backlights {
+        if(!instance)
+            instance = new Backlights;
 
-    readonly #name: string;
+        return instance;
-    #path: string;
-    #maxBrightness: number;
-    #brightness: number;
-    #available: boolean = true;
-    #monitor: Gio.FileMonitor;
-
-    @signal(Number) brightnessChanged(_: number): void {};
-
-    @getter(String)
-    get name() { return this.#name; }
-
-    @getter(String)
-    get path() { return this.#path; }
-
-    @getter(GObject.Object as unknown as ParamSpec<Backlight>)
-    get default() { return Backlight.default; }
-
-    @getter(Object as unknown as ParamSpec<Array<Backlight>>)
-    get backlights() { return Backlight.backlights; }
-    
-    @getter(Boolean)
-    get isDefault() { return this.path === this.default?.path; }
-
-    @getter(Number) 
-    get brightness() { return this.#brightness; };
-    @setter(Number)
-    set brightness(level: number) {
-        if(!this.writeBrightness(level)) return;
-
-        this.#brightness = level;
-        this.notify("brightness");
-        this.emit("brightness-changed", level);
     }
 
-    @getter(Number) 
+    export class Backlights extends GObject.Object {
-    get maxBrightness() { return this.#maxBrightness;};
+        static {
+            GObject.registerClass({
+                GTypeName: "Backlights"
+            }, this);
+        }
+        public static $gtype: GObject.GType<Backlights>;
 
+
+        #backlights: Array<Backlight> = [];
+        #default: Backlight|null = null;
+        #available: boolean = false;
+        
+
+        @getter(Array as unknown as ParamSpec<Array<Backlight>>)
+        get backlights() { return this.#backlights; }
+
+        @getter(Backlight as unknown as ParamSpec<Backlight|null>)
+        get default() { return this.#default; }
+
+        /** true if there are any backlights available */
         @getter(Boolean)
         get available() { return this.#available; }
 
-
+        public scan(): Array<Backlight> {
-    declare $signals: GObject.Object.SignalSignatures & {
-        "brightness-changed": (value: number) => void
-    };
-
-    public static setDefault(backlight: Backlight): void {
-        const prev = this.default;
-        this.default = backlight;
-
-        prev && prev.notify("is-default");
-        backlight.notify("is-default");
-        this.backlights.forEach(bk => bk.notify("default"));
-    }
-
-    public static amount(): number {
-        const dir = Gio.File.new_for_path(`/sys/class/backlight`);
-        let num: number = 0,
-            fileEnum: Gio.FileEnumerator;
-
-        try {
-            fileEnum = dir.enumerate_children("standard::*", Gio.FileQueryInfoFlags.NONE, null);
-
-            for(const _ of fileEnum) 
-                num++;
-        } catch(_) {
-            return num;
-        }
-
-        return num;
-    }
-
-    public static scan(): Array<Backlight> {
             const dir = Gio.File.new_for_path(`/sys/class/backlight`),
                 backlights: Array<Backlight> = [];
 
@@ -103,21 +57,89 @@ class Backlight extends GObject.Object {
                 return [];
             }
 
-        Backlight._backlights = backlights;
+            if(backlights.length < 1 && this.#available === true) {
-        backlights.forEach(bk => bk.notify("backlights"));
+                this.#available = false;
+                this.notify("available");
+            }
+
+            if(this.#backlights.length < 1 && backlights.length > 0) {
+                this.#available = true;
+                this.notify("available");
+            }
+
+            this.#backlights = backlights;
+            this.notify("backlights");
+
             return backlights;
         }
 
+        public setDefault(bk: Backlight): void {
+            this.#default = bk;
+            this.notify("default");
+        }
+
+        constructor(scan: boolean = true) {
+            super();
+            scan && this.scan();
+        }
+    }
+
+    export class Backlight extends GObject.Object {
+        static {
+            GObject.registerClass({
+                GTypeName: "Backlight"
+            }, this);
+        }
+        public static $gtype: GObject.GType<Backlight>;
+
+        readonly #name: string;
+        #path: string;
+        #maxBrightness: number;
+        #brightness: number;
+        #monitor: Gio.FileMonitor;
+        #conn: number;
+
+        @signal(Number) brightnessChanged(_: number): void {};
+
+        @getter(String)
+        get name() { return this.#name; }
+
+        @getter(String)
+        get path() { return this.#path; }
+
+        @getter(Boolean)
+        get isDefault() { return this.path === getDefault().default?.path; }
+
+        @getter(Number) 
+        get brightness() { return this.#brightness; };
+        @setter(Number)
+        set brightness(level: number) {
+            if(!this.writeBrightness(level)) return;
+
+            this.#brightness = level;
+            this.notify("brightness");
+            this.emit("brightness-changed", level);
+        }
+
+        @getter(Number) 
+        get maxBrightness() { return this.#maxBrightness;};
+
+
+        declare $signals: GObject.Object.SignalSignatures & {
+            "brightness-changed": (value: number) => void
+        };
+
         // intel_backlight is mostly the default on laptops
         constructor(name: string = "intel_backlight") {
             super();
 
             // check if backlight exists
-        if(!Gio.File.new_for_path(`/sys/class/backlight/${name}/brightness`).query_exists(null)) {
+            if(!Gio.File.new_for_path(`/sys/class/backlight/${name}/brightness`).query_exists(null)) 
-            this.#available = false;
-            this.notify("available");
                 throw new Error(`Brightness: Couldn't find brightness for "${name}"`);
-        }
+
+            // notify :is-default on default backlight change
+            this.#conn = getDefault().connect("notify::default", () => 
+                this.notify("is-default"));
 
             this.#name = name;
             this.#path = `/sys/class/backlight/${name}`;
@@ -147,7 +169,7 @@ class Backlight extends GObject.Object {
 
         private writeBrightness(level: number): boolean {
             try {
-            writeFile(`${this.#path}/brightness`, level.toString());
+                exec(`brightnessctl -d ${this.#name} s ${level}`);
                 return true;
             } catch(e) {
                 console.error(`Backlight: Couldn't set brightness for "${this.#name}". Stderr: ${e}`);
@@ -156,26 +178,9 @@ class Backlight extends GObject.Object {
             return false;
         }
 
-    public static getDefault(): Backlight|null {
-        if(this.default) 
-            return this.default;
-
-        if(this.backlights.length < 1)
-            this.scan();
-
-        const first = this.backlights[0];
-        if(first) {
-            try {
-                this.default = first;
-                return this.default;
-            } catch(_) {}
-        }
-
-        return null;
-    }
-
         vfunc_dispose(): void {
             this.#monitor.cancel();
+            getDefault().disconnect(this.#conn);
         }
 
         public emit<Signal extends keyof typeof this.$signals>(
@@ -184,4 +189,5 @@ class Backlight extends GObject.Object {
         ): void {
             super.emit(signal, ...args);
         }
+    }
 }

src/widget/control-center/Sliders.tsx

@@ -4,7 +4,7 @@ import { Pages } from "./Pages";
 import { PageSound } from "./pages/Sound";
 import { PageMicrophone } from "./pages/Microphone";
 import { createBinding, With } from "ags";
-import { Backlight } from "../../modules/backlight";
+import { Backlights } from "../../modules/backlight";
 
 import AstalWp from "gi://AstalWp";
 import { PageBacklight } from "./pages/Backlight";
@@ -50,10 +50,9 @@ export function Sliders() {
                     slidersPages?.toggle(PageMicrophone)} />
             </Gtk.Box>}
         </With>
-        <Gtk.Box visible={Boolean(Backlight.getDefault())}>
+        <Gtk.Box visible={createBinding(Backlights.getDefault(), "available")}>
-            {Backlight.getDefault() &&
+            <With value={createBinding(Backlights.getDefault(), "default")}>
-                <With value={createBinding(Backlight.getDefault()!, "default")}>
+                {(bklight: Backlights.Backlight|null) => bklight && 
-                    {(bklight: Backlight) => bklight && 
                     <Gtk.Box class={"backlight"} spacing={3}>
                         <Gtk.Button onClicked={() => {
                               bklight.brightness = bklight.maxBrightness
@@ -63,7 +62,7 @@ export function Sliders() {
                         <Astal.Slider drawValue={false} hexpand value={createBinding(bklight, "brightness")} 
                           max={bklight.maxBrightness}
                           onChangeValue={(_, __, value) => {
-                                  Backlight.getDefault()!.brightness = value
+                              bklight.brightness = value
                           }}
                         />
                         <Gtk.Button class={"more"} iconName={"go-next-symbolic"} onClicked={() => 
@@ -71,7 +70,6 @@ export function Sliders() {
                     </Gtk.Box>
                 }
             </With>
-            }
         </Gtk.Box>
         <Pages $={(self) => slidersPages = self} />
     </Gtk.Box>

src/widget/control-center/pages/Backlight.tsx

@@ -1,6 +1,6 @@
 import { Astal, Gtk } from "ags/gtk4";
 import { tr } from "../../../i18n/intl";
-import { Backlight } from "../../../modules/backlight";
+import { Backlights } from "../../../modules/backlight";
 import { Page } from "./Page";
 import { createBinding, With } from "ags";
 import { addSliderMarksFromMinMax } from "../../../modules/utils";
@@ -11,8 +11,8 @@ export const PageBacklight = new Page({
     title: tr("control_center.pages.backlight.title"),
     description: tr("control_center.pages.backlight.description"),
     content: () => (
-        <With value={createBinding(Backlight.getDefault()!, "backlights")}>
+        <With value={createBinding(Backlights.getDefault(), "backlights")}>
-            {(bklights: Array<Backlight>) => bklights.length > 0 &&
+            {(bklights: Array<Backlights.Backlight>) => bklights.length > 0 &&
                 <Gtk.Box orientation={Gtk.Orientation.VERTICAL} spacing={6}>
                     {bklights.map((bklight, i) =>
                         <Gtk.Box class={"bklight"} orientation={Gtk.Orientation.VERTICAL}
@@ -36,6 +36,6 @@ export const PageBacklight = new Page({
     headerButtons: [{
         icon: "arrow-circular-top-right",
         tooltipText: tr("control_center.pages.backlight.refresh"),
-        actionClicked: () => Backlight.scan()
+        actionClicked: () => Backlights.getDefault().scan()
     }]
 });