Initial commit: Electron + React touchscreen kiosk dashboard for Home Assistant
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229
electron/services/ScreenManager.ts
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229
electron/services/ScreenManager.ts
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import { BrowserWindow } from 'electron';
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import { exec } from 'child_process';
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import { promisify } from 'util';
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const execAsync = promisify(exec);
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// DBus environment for GNOME Wayland - needed to communicate with session services
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const DBUS_ENV = {
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XDG_RUNTIME_DIR: '/run/user/1000',
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DBUS_SESSION_BUS_ADDRESS: 'unix:path=/run/user/1000/bus',
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};
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export class ScreenManager {
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private window: BrowserWindow;
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private idleTimeout: number = 300000; // 5 minutes default
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private idleTimer: NodeJS.Timeout | null = null;
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private isScreenOn: boolean = true;
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private lastActivity: number = Date.now();
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private screenControlAvailable: boolean = true;
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private isWayland: boolean = false;
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constructor(window: BrowserWindow) {
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this.window = window;
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this.detectDisplayServer();
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this.setupActivityListeners();
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this.startIdleMonitor();
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}
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private detectDisplayServer(): void {
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// Check if running under Wayland
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this.isWayland = !!(process.env.WAYLAND_DISPLAY || process.env.XDG_SESSION_TYPE === 'wayland');
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console.log(`ScreenManager: Display server detected - ${this.isWayland ? 'Wayland' : 'X11'}`);
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}
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private setupActivityListeners(): void {
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// Monitor keyboard and mouse activity
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this.window.webContents.on('before-input-event', () => {
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this.resetIdleTimer();
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});
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// Also listen for any cursor/pointer events via IPC from renderer
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// Touch events on Wayland may not trigger before-input-event
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}
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// Called from renderer when touch/click detected
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public handleUserActivity(): void {
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this.lastActivity = Date.now();
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// Always try to wake the screen on touch/click - user is actively interacting
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if (!this.isScreenOn) {
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this.wakeScreen();
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}
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}
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private startIdleMonitor(): void {
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this.idleTimer = setInterval(() => {
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const idleTime = Date.now() - this.lastActivity;
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if (idleTime >= this.idleTimeout && this.isScreenOn && this.screenControlAvailable) {
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this.sleepScreen();
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}
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}, 30000); // Check every 30 seconds (not 10) to reduce spam
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}
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private resetIdleTimer(): void {
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this.lastActivity = Date.now();
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if (!this.isScreenOn) {
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this.wakeScreen();
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}
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}
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setIdleTimeout(timeout: number): void {
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this.idleTimeout = timeout;
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}
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async wakeScreen(): Promise<void> {
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// Always attempt to wake - the screen may have been externally put to sleep by GNOME
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if (!this.screenControlAvailable) {
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this.isScreenOn = true;
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return;
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}
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try {
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if (process.platform === 'linux') {
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if (this.isWayland) {
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// On GNOME Wayland, we need multiple approaches because:
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// 1. The screensaver/lock screen blocks DBus SetActive calls
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// 2. We need to wake DPMS separately from screensaver
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// 3. Simulating input is the most reliable way to wake
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let woke = false;
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// Method 1: Simulate mouse movement with ydotool (most reliable on Wayland)
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// This bypasses all the GNOME screensaver/DPMS complications
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try {
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// ydotool syntax: mousemove <x> <y> (relative movement)
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await execAsync('ydotool mousemove 1 0 && ydotool mousemove -- -1 0', { env: { ...process.env, ...DBUS_ENV } });
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console.log('ScreenManager: Screen woke via ydotool mouse movement');
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woke = true;
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} catch (e) {
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console.log('ScreenManager: ydotool failed:', e);
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}
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// Method 2: loginctl unlock-session (unlocks GNOME lock screen)
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if (!woke) {
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try {
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await execAsync('loginctl unlock-session', { env: { ...process.env, ...DBUS_ENV } });
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console.log('ScreenManager: Session unlocked via loginctl');
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woke = true;
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} catch (e) {
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console.log('ScreenManager: loginctl unlock failed:', e);
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}
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}
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// Method 3: gnome-screensaver-command (older GNOME)
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if (!woke) {
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try {
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await execAsync('gnome-screensaver-command --deactivate', { env: { ...process.env, ...DBUS_ENV } });
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console.log('ScreenManager: Screen woke via gnome-screensaver-command');
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woke = true;
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} catch {
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console.log('ScreenManager: gnome-screensaver-command not available');
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}
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}
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// Method 4: DBus SetActive (works when screen is blanked but not locked)
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if (!woke) {
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try {
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await execAsync('dbus-send --session --dest=org.gnome.ScreenSaver --type=method_call /org/gnome/ScreenSaver org.gnome.ScreenSaver.SetActive boolean:false', { env: { ...process.env, ...DBUS_ENV } });
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console.log('ScreenManager: Screen woke via dbus-send');
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woke = true;
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} catch {
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console.log('ScreenManager: dbus-send SetActive failed');
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}
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}
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// Method 5: Wake DPMS via wlr-randr or gnome-randr
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try {
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await execAsync('gnome-randr modify --on DP-1 2>/dev/null || wlr-randr --output DP-1 --on 2>/dev/null || true', { env: { ...process.env, ...DBUS_ENV } });
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} catch {
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// Ignore - display names vary
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}
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if (!woke) {
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console.log('ScreenManager: All wake methods failed');
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}
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} else {
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// X11 methods
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try {
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await execAsync('xset dpms force on');
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} catch {
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try {
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await execAsync('xdotool key shift');
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} catch {
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console.log('ScreenManager: No X11 screen control available, disabling feature');
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this.screenControlAvailable = false;
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}
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}
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}
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} else if (process.platform === 'win32') {
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await execAsync(
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'powershell -Command "(Add-Type -MemberDefinition \'[DllImport(\\"user32.dll\\")]public static extern int SendMessage(int hWnd,int hMsg,int wParam,int lParam);\' -Name a -Pas)::SendMessage(-1,0x0112,0xF170,-1)"'
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);
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} else if (process.platform === 'darwin') {
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await execAsync('caffeinate -u -t 1');
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}
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this.isScreenOn = true;
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this.lastActivity = Date.now();
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this.window.webContents.send('screen:woke');
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} catch (error) {
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console.error('Failed to wake screen:', error);
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this.isScreenOn = true; // Assume screen is on to prevent retry loops
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}
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}
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async sleepScreen(): Promise<void> {
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if (!this.isScreenOn) return;
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if (!this.screenControlAvailable) return;
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try {
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if (process.platform === 'linux') {
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if (this.isWayland) {
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// Use busctl with DBUS session for GNOME on Wayland
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try {
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await execAsync('busctl --user call org.gnome.ScreenSaver /org/gnome/ScreenSaver org.gnome.ScreenSaver SetActive b true', { env: { ...process.env, ...DBUS_ENV } });
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console.log('ScreenManager: Screen slept via GNOME ScreenSaver DBus');
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} catch {
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try {
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// Fallback: Try wlopm
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await execAsync('wlopm --off \\*', { env: { ...process.env, ...DBUS_ENV } });
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} catch {
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// No working method - disable screen control
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console.log('ScreenManager: Wayland screen sleep not available, disabling feature');
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this.screenControlAvailable = false;
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return;
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}
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}
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} else {
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try {
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await execAsync('xset dpms force off');
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} catch {
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console.log('ScreenManager: X11 screen sleep not available, disabling feature');
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this.screenControlAvailable = false;
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return;
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}
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}
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} else if (process.platform === 'win32') {
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await execAsync(
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'powershell -Command "(Add-Type -MemberDefinition \'[DllImport(\\"user32.dll\\")]public static extern int SendMessage(int hWnd,int hMsg,int wParam,int lParam);\' -Name a -Pas)::SendMessage(-1,0x0112,0xF170,2)"'
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);
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} else if (process.platform === 'darwin') {
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await execAsync('pmset displaysleepnow');
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}
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this.isScreenOn = false;
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this.window.webContents.send('screen:slept');
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} catch (error) {
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console.error('Failed to sleep screen:', error);
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// Disable feature to prevent spam
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this.screenControlAvailable = false;
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}
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}
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destroy(): void {
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if (this.idleTimer) {
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clearInterval(this.idleTimer);
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this.idleTimer = null;
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}
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}
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}
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