Video stream UI improvements

submodules/Components/ActivityIndicatorComponent/Sources/ActivityIndicatorComponent.swift

@@ -0,0 +1,39 @@
+import Foundation
+import UIKit
+import ComponentFlow
+
+public final class ActivityIndicatorComponent: Component {
+    public init(
+    ) {
+    }
+
+    public static func ==(lhs: ActivityIndicatorComponent, rhs: ActivityIndicatorComponent) -> Bool {
+        return true
+    }
+    
+    public final class View: UIActivityIndicatorView {
+        public init() {
+            super.init(style: .whiteLarge)
+        }
+        
+        required public init(coder: NSCoder) {
+            fatalError("init(coder:) has not been implemented")
+        }
+        
+        func update(component: ActivityIndicatorComponent, availableSize: CGSize, transition: Transition) -> CGSize {
+            if !self.isAnimating {
+                self.startAnimating()
+            }
+            
+            return CGSize(width: 22.0, height: 22.0)
+        }
+    }
+    
+    public func makeView() -> View {
+        return View()
+    }
+    
+    public func update(view: View, availableSize: CGSize, state: EmptyComponentState, environment: Environment<Empty>, transition: Transition) -> CGSize {
+        return view.update(component: self, availableSize: availableSize, transition: transition)
+    }
+}