✨ feat: add backlight support
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retrozinndev
@@ -0,0 +1,175 @@
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import { monitorFile, readFile, writeFile } from "ags/file";
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import GObject, { getter, ParamSpec, register, setter, signal } from "ags/gobject";
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import Gio from "gi://Gio?version=2.0";
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export { Backlight };
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@register({ GTypeName: "Backlight" })
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class Backlight extends GObject.Object {
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private static _backlights: Array<Backlight> = [];
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public static get backlights() {
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return this._backlights;
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};
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private static default: Backlight;
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readonly #name: string;
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#path: string;
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#maxBrightness: number;
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#brightness: number;
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#available: boolean = true;
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@signal(Number) brightnessChanged(_: number): void {};
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@getter(String)
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get path() { return this.#path; }
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@getter(GObject.Object as unknown as ParamSpec<Backlight>)
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get default() { return Backlight.default; }
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@getter(Boolean)
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get isDefault() { return this.path === this.default?.path; }
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@getter(Number)
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get brightness() { return this.#brightness; };
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@setter(Number)
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set brightness(level: number) {
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if(!this.writeBrightness(level)) return;
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this.#brightness = level;
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this.notify("brightness");
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this.emit("brightness-changed", level);
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}
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@getter(Number)
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get maxBrightness() { return this.#maxBrightness;};
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@getter(Boolean)
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get available() { return this.#available; }
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declare $signals: GObject.Object.SignalSignatures & {
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"brightness-changed": (value: number) => void
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};
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public static setDefault(backlight: Backlight): void {
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const prev = this.default;
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this.default = backlight;
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prev && prev.notify("is-default");
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backlight.notify("is-default");
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this.backlights.forEach(bk => bk.notify("default"));
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}
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public static amount(): number {
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const dir = Gio.File.new_for_path(`/sys/class/backlight`);
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let num: number = 0,
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fileEnum: Gio.FileEnumerator;
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try {
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fileEnum = dir.enumerate_children("standard::*", Gio.FileQueryInfoFlags.NONE, null);
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for(const _ of fileEnum)
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num++;
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} catch(_) {
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return num;
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}
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return num;
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}
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public static scan(): Array<Backlight> {
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const dir = Gio.File.new_for_path(`/sys/class/backlight`),
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backlights: Array<Backlight> = [];
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let fileEnum: Gio.FileEnumerator;
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try {
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fileEnum = dir.enumerate_children("standard::*", Gio.FileQueryInfoFlags.NONE, null);
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for(const backlight of fileEnum) {
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try {
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backlights.push(new Backlight(backlight.get_name()));
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} catch(_) {}
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}
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} catch(_) {
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return [];
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}
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Backlight._backlights = backlights;
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return backlights;
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}
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// intel_backlight is mostly the default on laptops
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constructor(name: string = "intel_backlight") {
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super();
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// check if backlight exists
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if(!Gio.File.new_for_path(`/sys/class/backlight/${name}/brightness`).query_exists(null)) {
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this.#available = false;
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this.notify("available");
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throw new Error(`Brightness: Couldn't find brightness for "${name}"`);
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}
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this.#name = name;
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this.#path = `/sys/class/backlight/${name}`;
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this.notify("path");
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this.#maxBrightness = Number.parseInt(readFile(`${this.#path}/max_brightness`));
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this.notify("max-brightness");
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this.#brightness = Number.parseInt(readFile(`${this.#path}/brightness`))
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monitorFile(`/sys/class/backlight/${name}/brightness`, () => {
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this.#brightness = this.readBrightness();
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this.notify("brightness");
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this.emit("brightness-changed", this.brightness);
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});
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}
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private readBrightness(): number {
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try {
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const brightness = Number.parseInt(readFile(`${this.#path}/brightness`));
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return brightness;
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} catch(e) {
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console.error(`Backlight: An error occurred while reading brightness from "${this.#name}"`);
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}
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return this.#brightness ?? this.#maxBrightness ?? 0;
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}
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private writeBrightness(level: number): boolean {
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try {
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writeFile(`${this.#path}/brightness`, level.toString());
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return true;
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} catch(e) {
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console.error(`Backlight: Couldn't set brightness for "${this.#name}". Stderr: ${e}`);
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}
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return false;
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}
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public static getDefault(): Backlight|null {
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if(this.default)
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return this.default;
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if(this.backlights.length < 1)
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this.scan();
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const first = this.backlights[0];
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if(first) {
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try {
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this.default = first;
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return this.default;
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} catch(_) {}
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}
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return null;
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}
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public emit<Signal extends keyof typeof this.$signals>(
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signal: Signal,
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...args: Parameters<(typeof this.$signals)[Signal]>
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): void {
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super.emit(signal, ...args);
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}
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}
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@@ -1,42 +0,0 @@
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import { exec, execAsync, GObject, monitorFile, readFileAsync, register, signal } from "astal";
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import { Connectable } from "astal/binding";
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/** !!TODO!! Needs more work and testing
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* I(retrozinndev) don't have a monitor that has software-controlled brightness :(
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*/
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@register({ GTypeName: "Brightness" })
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class Brightness extends GObject.Object implements Connectable {
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private readonly backlight: string|undefined;
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private max: number;
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private brightness: number;
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@signal(Number)
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declare brightnessChanged: (value: number) => void;
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constructor(backlightDevice?: string) {
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super();
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this.backlight = backlightDevice || "intel_backlight";
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this.max = Number.parseInt(exec(`brightnessctl -d ${backlightDevice} max`))
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this.brightness = Number.parseInt(exec(`brightnessctl -d ${backlightDevice} get`))
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readFileAsync(`/sys/class/backlight/${backlightDevice}/brightness`).catch(() => {
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throw new Error(`Couldn't find backlight ${backlightDevice}`);
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});
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monitorFile(`/sys/class/backlight/${backlightDevice}/brightness`, async () => {
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this.brightness = Number.parseInt(await execAsync(`brightnessctl -d ${backlightDevice} get`));
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this.max = Number.parseInt(await execAsync(`brightnessctl -d ${backlightDevice} max`));
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this.emit("brightness-changed", this.brightness);
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});
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}
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public setBrightness(newBrightness: number): void {
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execAsync(`brightnessctl -d ${this.backlight} set ${newBrightness || this.brightness}`).catch(() => {
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throw new Error(`Couldn't set brightness of backlight ${this.backlight}`);
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});
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this.emit("brightness-changed", newBrightness);
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}
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}
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