Attempt at a kiosk mode UI

swift/kioskapp/Dockerfile

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+# Stage 1: Build the Swift GTK application
+FROM swift:6.2-jammy AS builder
+
+# Install GTK4 development dependencies
+RUN apt-get update && apt-get install -y \
+    libgtk-4-dev \
+    pkg-config \
+    && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+COPY Package.swift ./
+
+# Resolve dependencies first (cached unless Package.swift changes)
+RUN swift package resolve
+
+COPY Sources/ ./Sources/
+
+# Build the application
+RUN swift build
+
+# Stage 2: Runtime with Cage compositor
+FROM ubuntu:22.04
+
+# Install runtime dependencies
+RUN apt-get update && apt-get install -y \
+    # Cage Wayland compositor
+    cage \
+    # Seat management daemon
+    seatd \
+    # GTK4 runtime
+    libgtk-4-1 \
+    # Wayland and graphics
+    libwayland-client0 \
+    libwayland-server0 \
+    libegl1 \
+    libgles2 \
+    libgbm1 \
+    libdrm2 \
+    libinput10 \
+    libxkbcommon0 \
+    # Mesa DRI drivers (required for EGL/GPU rendering)
+    libgl1-mesa-dri \
+    # Fonts
+    fonts-dejavu-core \
+    # D-Bus (required for GTK)
+    dbus \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create a non-root user (cage refuses to run as root)
+# Add to video group for DRM access
+RUN groupadd -f render && useradd -m -s /bin/bash -G video,render kioskuser
+
+WORKDIR /app
+
+# Copy Swift runtime libraries from builder
+COPY --from=builder /usr/lib/swift/linux /usr/lib/swift/linux
+ENV LD_LIBRARY_PATH=/usr/lib/swift/linux
+
+# Copy the built binary from builder stage
+COPY --from=builder /app/.build/debug/KioskApp ./app
+
+# Environment variables for Wayland/GTK
+ENV GDK_BACKEND=wayland
+ENV GTK_THEME=Adwaita
+
+# Entrypoint: start seatd, then run cage as kioskuser
+CMD ["/bin/sh", "-c", "\
+    mkdir -p /run/user/1000 && chown kioskuser:kioskuser /run/user/1000 && chmod 700 /run/user/1000 && \
+    chmod 666 /dev/dri/* && \
+    seatd -g video &\
+    sleep 0.5 && \
+    runuser -u kioskuser -- env XDG_RUNTIME_DIR=/run/user/1000 LIBSEAT_BACKEND=seatd WLR_BACKENDS=drm WLR_DRM_DEVICES=/dev/dri/card1 cage -ds -- /app/app \
+"]

swift/kioskapp/Package.swift

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+// swift-tools-version:6.1
+import PackageDescription
+
+let package = Package(
+    name: "KioskApp",
+    platforms: [
+        .macOS(.v14)
+    ],
+    dependencies: [
+        .package(url: "https://github.com/stackotter/swift-cross-ui", revision: "main")
+    ],
+    targets: [
+        .executableTarget(
+            name: "KioskApp",
+            dependencies: [
+                .product(name: "SwiftCrossUI", package: "swift-cross-ui"),
+                .product(name: "GtkBackend", package: "swift-cross-ui")
+            ]
+        )
+    ]
+)

swift/kioskapp/Sources/KioskApp/main.swift

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+import SwiftCrossUI
+import GtkBackend
+
+@main
+struct KioskApp: App {
+    var body: some Scene {
+        WindowGroup("Kiosk App") {
+            ContentView()
+        }
+    }
+}
+
+struct ContentView: View {
+    @State private var count = 0
+
+    var body: some View {
+        VStack(spacing: 20) {
+            Text("Swift GTK Kiosk App")
+                .font(.largeTitle)
+
+            Text("Running in Cage Wayland Compositor")
+                .font(.body)
+
+            Text("Count: \(count)")
+                .font(.title)
+
+            HStack(spacing: 10) {
+                Button("Decrement") {
+                    count -= 1
+                }
+
+                Button("Increment") {
+                    count += 1
+                }
+            }
+        }
+        .padding(40)
+    }
+}

swift/kioskapp/wendy.json

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+{
+  "appId" : "com.example.kioskapp",
+  "entitlements" : [
+    {
+      "type" : "audio"
+    },
+    {
+      "mode" : "bluez",
+      "type" : "bluetooth"
+    },
+    {
+      "mode" : "host",
+      "type" : "network"
+    },
+    {
+      "allowlist" : [
+
+      ],
+      "mode" : "all",
+      "type" : "video"
+    },
+    {
+      "name" : "app-com.example.kioskapp",
+      "path" : "\/mnt\/app",
+      "type" : "persist"
+    },
+    {
+      "name" : "wendy-shared",
+      "path" : "\/mnt\/shared",
+      "type" : "persist"
+    },
+    {
+      "type" : "gpu"
+    }
+  ],
+  "version" : "0.0.1"
+}