fix(tvos): handle play pause remote

close #1230

tvos/Runner/AppDelegate.swift

@@ -5,6 +5,113 @@ import universal_gamepad
 import os_media_controls
 import wakelock_plus
 
+@objc class PlezyFlutterViewController: FlutterViewController {
+  private lazy var tvRemoteChannel = FlutterBasicMessageChannel(
+    name: "flutter/gamepadtouchevent",
+    binaryMessenger: binaryMessenger,
+    codec: FlutterJSONMessageCodec.sharedInstance()
+  )
+
+  override var canBecomeFirstResponder: Bool {
+    true
+  }
+
+  override func viewDidAppear(_ animated: Bool) {
+    super.viewDidAppear(animated)
+    becomeFirstResponder()
+  }
+
+  override func viewWillDisappear(_ animated: Bool) {
+    resignFirstResponder()
+    super.viewWillDisappear(animated)
+  }
+
+  override func pressesBegan(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
+    if handlePlayPausePress(presses) {
+      return
+    }
+
+    super.pressesBegan(presses, with: event)
+  }
+
+  override func pressesEnded(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
+    if containsPlayPausePress(presses) {
+      return
+    }
+
+    super.pressesEnded(presses, with: event)
+  }
+
+  override func pressesCancelled(_ presses: Set<UIPress>, with event: UIPressesEvent?) {
+    if containsPlayPausePress(presses) {
+      return
+    }
+
+    super.pressesCancelled(presses, with: event)
+  }
+
+  override func remoteControlReceived(with event: UIEvent?) {
+    guard let event = event else {
+      super.remoteControlReceived(with: event)
+      return
+    }
+
+    let subtype = event.subtype
+    print("PlezyTvRemote: remote control event subtype=\(remoteControlSubtypeName(subtype))")
+    switch subtype {
+    case .remoteControlPlay, .remoteControlPause, .remoteControlTogglePlayPause:
+      sendPlayPauseEvent(source: "remote_control", detail: remoteControlSubtypeName(subtype))
+    default:
+      super.remoteControlReceived(with: event)
+    }
+  }
+
+  private func handlePlayPausePress(_ presses: Set<UIPress>) -> Bool {
+    guard containsPlayPausePress(presses) else { return false }
+
+    sendPlayPauseEvent(source: "presses", detail: "playPause")
+    return true
+  }
+
+  private func containsPlayPausePress(_ presses: Set<UIPress>) -> Bool {
+    presses.contains { press in
+      press.type == .playPause
+    }
+  }
+
+  private func sendPlayPauseEvent(source: String, detail: String) {
+    print("PlezyTvRemote: intercepted play/pause source=\(source) detail=\(detail)")
+    tvRemoteChannel.sendMessage(["type": "play_pause", "source": source, "detail": detail])
+  }
+
+  private func remoteControlSubtypeName(_ subtype: UIEvent.EventSubtype) -> String {
+    switch subtype {
+    case .remoteControlPlay:
+      return "remoteControlPlay"
+    case .remoteControlPause:
+      return "remoteControlPause"
+    case .remoteControlTogglePlayPause:
+      return "remoteControlTogglePlayPause"
+    case .remoteControlStop:
+      return "remoteControlStop"
+    case .remoteControlNextTrack:
+      return "remoteControlNextTrack"
+    case .remoteControlPreviousTrack:
+      return "remoteControlPreviousTrack"
+    case .remoteControlBeginSeekingForward:
+      return "remoteControlBeginSeekingForward"
+    case .remoteControlEndSeekingForward:
+      return "remoteControlEndSeekingForward"
+    case .remoteControlBeginSeekingBackward:
+      return "remoteControlBeginSeekingBackward"
+    case .remoteControlEndSeekingBackward:
+      return "remoteControlEndSeekingBackward"
+    default:
+      return "unknown(\(subtype.rawValue))"
+    }
+  }
+}
+
 @main
 @objc class AppDelegate: FlutterAppDelegate {
   override func application(