feat(desktop): portal-based Linux global shortcuts and PTT (#3185)

fluxer_desktop/src/main/LinuxSession.ts

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import fs from 'node:fs';
+import type {LinuxDesktopKind, LinuxSessionType} from '@electron/common/Types';
+
+type SessionEnv = Readonly<Record<string, string | undefined>>;
+
+export function detectLinuxSessionType(env: SessionEnv, pathExists: (candidate: string) => boolean): LinuxSessionType {
+	const sessionType = (env.XDG_SESSION_TYPE ?? '').trim().toLowerCase();
+	if (sessionType === 'x11' || sessionType === 'wayland') return sessionType;
+	const waylandDisplay = (env.WAYLAND_DISPLAY ?? '').trim();
+	if (waylandDisplay.length > 0) {
+		const runtimeDir = (env.XDG_RUNTIME_DIR ?? '').trim();
+		const socketPath = waylandDisplay.startsWith('/')
+			? waylandDisplay
+			: runtimeDir.length > 0
+				? `${runtimeDir.replace(/\/+$/, '')}/${waylandDisplay}`
+				: null;
+		if (socketPath !== null && pathExists(socketPath)) return 'wayland';
+	}
+	if ((env.DISPLAY ?? '').trim().length > 0) return 'x11';
+	return 'unknown';
+}
+
+export function detectLinuxDesktop(env: SessionEnv): LinuxDesktopKind {
+	const tokens = new Set((env.XDG_CURRENT_DESKTOP ?? '').split(':').map((token) => token.trim().toLowerCase()));
+	if (tokens.has('kde')) return 'kde';
+	if (tokens.has('hyprland') || (env.HYPRLAND_INSTANCE_SIGNATURE ?? '').trim().length > 0) return 'hyprland';
+	if (tokens.has('gnome')) return 'gnome';
+	return 'other';
+}
+
+export function isKdePlasma5Session(env: SessionEnv): boolean {
+	return (env.KDE_SESSION_VERSION ?? '').trim() === '5';
+}
+
+function pathExists(candidate: string): boolean {
+	try {
+		return fs.existsSync(candidate);
+	} catch {
+		return false;
+	}
+}
+
+export function getLinuxSessionType(): LinuxSessionType {
+	if (process.platform !== 'linux') return 'unknown';
+	return detectLinuxSessionType(process.env, pathExists);
+}
+
+export function isWaylandSession(): boolean {
+	return getLinuxSessionType() === 'wayland';
+}
+
+export function isX11Session(): boolean {
+	return getLinuxSessionType() === 'x11';
+}
+
+export function getLinuxDesktop(): LinuxDesktopKind {
+	return detectLinuxDesktop(process.env);
+}