✨ ags(scripts/wallpaper): use a undependent-script way of setting wallpaper, add method to reload colors

ags/scripts/wallpaper.ts

@@ -0,0 +1,137 @@
+import { execAsync, Gio, GLib, GObject, monitorFile, property, register } from "astal";
+
+export { Wallpaper };
+
+@register({ GTypeName: "Wallpaper" })
+class Wallpaper extends GObject.Object {
+    private static instance: Wallpaper;
+    #wallpaper: (string|undefined);
+    #splash: boolean = true;
+    #monitor: Gio.FileMonitor;
+    #hyprpaperFile: Gio.File;
+    #wallpapersPath: string;
+
+    @property(Boolean)
+    public get splash() { return this.#splash; }
+    public set splash(showSplash: boolean) {
+        this.#splash = showSplash;
+        this.notify("splash");
+
+        this.writeChanges();
+    }
+
+    @property(String)
+    public get wallpaper(): (string|undefined) { return this.#wallpaper; }
+    public set wallpaper(newValue: string) { this.setWallpaper(newValue); }
+
+    public get wallpapersPath() { return this.#wallpapersPath; }
+
+    constructor() {
+        super();
+        this.#wallpapersPath = GLib.getenv("WALLPAPERS") ?? `${GLib.get_home_dir()}/wallpapers`;
+        this.#hyprpaperFile = Gio.File.new_for_path(`${GLib.get_user_config_dir()}/hypr/hyprpaper.conf`);
+        this.getWallpaper().then((wall) => this.#wallpaper = wall).catch(r => {
+            throw new Error(`Wallpaper: Couldn't get wallpaper. Stderr: ${r}`)
+        });
+
+        this.#monitor = monitorFile(this.#hyprpaperFile.get_path()!, async (_, event) => {
+            if(event == Gio.FileMonitorEvent.CHANGED) {
+                const [loaded, , content ] = this.#hyprpaperFile.load_contents(null);
+                if(loaded) 
+                    for(const line of content.split('\n')) {
+                        const [ key, value ] = line.split('=');
+                        if(key.trim().startsWith('#'))
+                            continue;
+
+                        switch(key) {
+                            case "splash": 
+                                this.#splash = /(yes|true|on)/.test(value.trim()) ? true : false;
+                                break;
+
+                            case "wallpaper":
+                                this.#wallpaper = value;
+                                break;
+                        }
+                    };
+            }
+        });
+    }
+
+    vfunc_dispose(): void {
+        this.#monitor.cancel();
+    }
+
+    public static getDefault(): Wallpaper {
+        if(!this.instance)
+            this.instance = new Wallpaper();
+
+        return this.instance;
+    }
+
+    private async writeChanges(): Promise<void> {
+        if(!this.#wallpaper) return;
+
+        const hyprpaperFile = Gio.File.new_for_path(`${GLib.get_user_config_dir()}/hypr/hyprpaper.conf`);
+        hyprpaperFile.create(Gio.FileCreateFlags.REPLACE_DESTINATION, null);
+        return hyprpaperFile.replace_contents_async(`# This file is automatically generated when choosing a new wallpaper in colorshell
+            preload = ${this.#wallpaper}
+            splash = ${this.#splash}
+            wallpaper = , ${this.#wallpaper}`.split('\n').map(str => str.trimStart()).join('\n'), null, false, 
+            Gio.FileCreateFlags.REPLACE_DESTINATION, null
+        ).then(() => {}).catch(r => {
+            throw new Error(`Wallpaper: Couldn't write hyprpaper file. Stderr: ${r}`);
+        });
+    }
+
+    public async getWallpaper(): Promise<string|undefined> {
+        return await execAsync("hyprctl hyprpaper listactive | tail -n 1").then(stdout => {
+            const loaded: (string|undefined) = stdout.split('=')[1]?.trim();
+            if(!loaded) 
+                throw new Error(`Wallpaper: Couldn't get wallpaper. There are no loaded wallpaper(s)`);
+
+            return loaded;
+        }).catch(stderr => {
+            throw new Error(`Wallpaper: Couldn't get wallpaper. Stderr: ${stderr}`);
+        });
+    }
+
+    public async reloadColors(): Promise<void> {
+        return await execAsync(`wal -t --cols16 darken -i "${this.#wallpaper}"`).then(() => {
+        }).catch(r => {
+            throw new Error(`Wallpaper: Couldn't update shell colors. Stderr: ${r}`);
+        });
+    }
+
+    public async setWallpaper(path: string|Gio.File): Promise<void> {
+        return await execAsync("hyprctl hyprpaper unload all").then(async () => 
+            await execAsync(`hyprctl hyprpaper preload ${path}`).then(async () => 
+                await execAsync(`hyprctl hyprpaper wallpaper ${path}`).then(async () => {
+                    this.#wallpaper = (typeof path === "string") ? path : path.get_path()!;
+                    this.reloadColors();
+                    this.writeChanges().catch(r => {
+                        throw new Error(`Wallpaper: Couldn't write changes to hyprpaper config file. Stderr: ${r}`);
+                    });
+                }).catch(r => {
+                    throw new Error(`Wallpaper: Couldn't set wallpaper. Stderr: ${r}`);
+                })
+            ).catch(r => {
+                throw new Error(`Wallpaper: Couldn't preload image. Stderr: ${r}`);
+            })
+        ).catch(r => {
+            throw new Error(`Wallpaper: Couldn't unload images from memory. Stderr: ${r}`);
+        });
+    }
+
+    public async pickWallpaper(): Promise<string|undefined> {
+        return execAsync(`zenity --file-selection`).then(wall => {
+            if(!wall.trim()) return undefined;
+
+            this.setWallpaper(wall).catch(r => {
+                throw new Error(`Wallpaper: An error occurred in \`setWallpaper()\`. Stderr: ${r}`);
+            });
+            return wall;
+        }).catch(r => {
+            throw new Error(`Wallpaper: Couldn't pick wallpaper, is zenity installed? Stderr: ${r}`);
+        });
+    }
+}