Merge commit '7621e2f8dec938cf48181c8b10afc9b01f444e68' into beta

submodules/Display/Source/Navigation/MinimizedContainer.swift

@@ -0,0 +1,93 @@
+import Foundation
+import UIKit
+import AsyncDisplayKit
+
+public protocol MinimizedContainer: ASDisplayNode {
+    var navigationController: NavigationController? { get set }
+    var controllers: [MinimizableController] { get }
+    var isExpanded: Bool { get }
+    
+    var willMaximize: ((MinimizedContainer) -> Void)? { get set }
+    var willDismiss: ((MinimizedContainer) -> Void)? { get set }
+    var didDismiss: ((MinimizedContainer) -> Void)? { get set }
+    
+    var statusBarStyle: StatusBarStyle { get }
+    var statusBarStyleUpdated: (() -> Void)? { get set }
+    
+    func addController(_ viewController: MinimizableController, topEdgeOffset: CGFloat?, beforeMaximize: @escaping (NavigationController, @escaping () -> Void) -> Void, transition: ContainedViewLayoutTransition)
+    func removeController(_ viewController: MinimizableController)
+    func maximizeController(_ viewController: MinimizableController, animated: Bool, completion: @escaping (Bool) -> Void)
+    func collapse()
+    func dismissAll(completion: @escaping () -> Void)
+    
+    func updateLayout(_ layout: ContainerViewLayout, transition: ContainedViewLayoutTransition)
+    func collapsedHeight(layout: ContainerViewLayout) -> CGFloat
+}
+
+public protocol MinimizableController: ViewController {
+    var minimizedTopEdgeOffset: CGFloat? { get }
+    var minimizedBounds: CGRect? { get }
+    var isMinimized: Bool { get set }
+    var isMinimizable: Bool { get }
+    var minimizedIcon: UIImage? { get }
+    var minimizedProgress: Float? { get }
+    var isFullscreen: Bool { get }
+    
+    func requestMinimize(topEdgeOffset: CGFloat?, initialVelocity: CGFloat?)
+    func makeContentSnapshotView() -> UIView?
+    
+    func prepareContentSnapshotView()
+    func resetContentSnapshotView()
+    
+    func shouldDismissImmediately() -> Bool
+}
+
+public extension MinimizableController {
+    var isFullscreen: Bool {
+        return false
+    }
+    
+    var minimizedTopEdgeOffset: CGFloat? {
+        return nil
+    }
+    
+    var minimizedBounds: CGRect? {
+        return nil
+    }
+    
+    var isMinimized: Bool {
+        return false
+    }
+    
+    var isMinimizable: Bool {
+        return false
+    }
+    
+    var minimizedIcon: UIImage? {
+        return nil
+    }
+    
+    var minimizedProgress: Float? {
+        return nil
+    }
+    
+    func requestMinimize(topEdgeOffset: CGFloat?, initialVelocity: CGFloat?) {
+        
+    }
+    
+    func makeContentSnapshotView() -> UIView? {
+        return self.displayNode.view.snapshotView(afterScreenUpdates: false)
+    }
+    
+    func prepareContentSnapshotView() {
+        
+    }
+    
+    func resetContentSnapshotView() {
+        
+    }
+        
+    func shouldDismissImmediately() -> Bool {
+        return true
+    }
+}