pomelo scraps

src/ios/EmulationView.swift

@@ -0,0 +1,137 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-FileCopyrightText: Copyright 2024 Pomelo, Stossy11
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+import SwiftUI
+import AppUI
+import Foundation
+import GameController
+import UIKit
+import SwiftUIIntrospect
+
+struct EmulationView: View {
+    @StateObject private var viewModel: EmulationViewModel
+    @State var controllerconnected = false
+    @State var appui = AppUI.shared
+    var device: MTLDevice? = MTLCreateSystemDefaultDevice()
+    @State var CaLayer: CAMetalLayer?
+    @State var ShowPopup: Bool = false
+    @State var mtkview: MTKView?
+    @State private var thread: Thread!
+    @State var uiTabBarController: UITabBarController?
+    @State private var isFirstFrameShown = false
+    @State private var timer: Timer?
+    @Environment(\.scenePhase) var scenePhase
+
+    init(game: EmulationGame?) {
+        _viewModel = StateObject(wrappedValue: EmulationViewModel(game: game))
+    }
+
+    var body: some View {
+        ZStack {
+            MetalView(device: device) { view in
+                DispatchQueue.main.async {
+                    if let metalView = view as? MTKView {
+                        mtkview = metalView
+                        viewModel.configureAppUI(with: metalView)
+                    } else {
+                        print("Error: view is not of type MTKView")
+                    }
+                }
+            }
+            .onRotate { size in
+                viewModel.handleOrientationChange()
+            }
+            ControllerView()
+        }
+        .overlay(
+            // Loading screen overlay on top of MetalView
+            Group {
+                if !isFirstFrameShown {
+                    LoadingView()
+                }
+            }
+            .transition(.opacity)
+        )
+        .onAppear {
+            UIApplication.shared.isIdleTimerDisabled = true
+            startPollingFirstFrameShowed()
+        }
+        .onDisappear {
+            stopPollingFirstFrameShowed()
+            uiTabBarController?.tabBar.isHidden = false
+            viewModel.customButtonTapped()
+        }
+        .navigationBarBackButtonHidden(true)
+        .introspect(.tabView, on: .iOS(.v13, .v14, .v15, .v16, .v17)) { (tabBarController) in
+            tabBarController.tabBar.isHidden = true
+            uiTabBarController = tabBarController
+        }
+    }
+
+    private func startPollingFirstFrameShowed() {
+        timer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true) { _ in
+            if appui.FirstFrameShowed() {
+                withAnimation {
+                    isFirstFrameShown = true
+                }
+                stopPollingFirstFrameShowed()
+            }
+        }
+    }
+
+    private func stopPollingFirstFrameShowed() {
+        timer?.invalidate()
+        timer = nil
+        print("Timer Invalidated")
+    }
+}
+
+struct LoadingView: View {
+    var body: some View {
+        VStack {
+            ProgressView("Loading...")
+                // .font(.system(size: 90))
+                .progressViewStyle(CircularProgressViewStyle())
+                .padding()
+            Text("Please wait while the game loads.")
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .background(Color.black.opacity(0.8))
+        .foregroundColor(.white)
+    }
+}
+
+extension View {
+    func onRotate(perform action: @escaping (CGSize) -> Void) -> some View {
+        self.modifier(DeviceRotationModifier(action: action))
+    }
+}
+
+struct DeviceRotationModifier: ViewModifier {
+    let action: (CGSize) -> Void
+    @State var startedfirst: Bool = false
+
+    func body(content: Content) -> some View { content
+        .background(GeometryReader { geometry in
+            Color.clear
+                .preference(key: SizePreferenceKey.self, value: geometry.size)
+        })
+        .onPreferenceChange(SizePreferenceKey.self) { newSize in
+            if startedfirst {
+                action(newSize)
+            } else {
+                startedfirst = true
+            }
+        }
+    }
+}
+
+struct SizePreferenceKey: PreferenceKey {
+    static var defaultValue: CGSize = .zero
+
+    static func reduce(value: inout CGSize, nextValue: () -> CGSize) {
+        value = nextValue()
+    }
+}