Repo created

iphone/Maps/UI/BottomMenu/Presentation/BottomMenuPresentationController.swift

@@ -0,0 +1,36 @@
+final class BottomMenuPresentationController: UIPresentationController {
+  override func containerViewWillLayoutSubviews() {
+    super.containerViewWillLayoutSubviews()
+    (presentedViewController as? BottomMenuViewController)?.chromeView.frame = containerView!.bounds
+    presentedView?.frame = frameOfPresentedViewInContainerView
+  }
+  
+  override func presentationTransitionWillBegin() {
+    super.presentationTransitionWillBegin()
+    guard let presentedViewController = presentedViewController as? BottomMenuViewController,
+      let coordinator = presentedViewController.transitionCoordinator,
+      let containerView = containerView else { return }
+    
+    containerView.addSubview(presentedView!)
+    presentedViewController.containerView = containerView
+    presentedViewController.chromeView.frame = containerView.bounds
+    presentedViewController.chromeView.alpha = 0
+    
+    coordinator.animate(alongsideTransition: { _ in
+      presentedViewController.chromeView.alpha = 1
+    }, completion: nil)
+  }
+  
+  override func dismissalTransitionWillBegin() {
+    super.dismissalTransitionWillBegin()
+    guard let presentedViewController = presentedViewController as? BottomMenuViewController,
+      let coordinator = presentedViewController.transitionCoordinator,
+      let presentedView = presentedView else { return }
+    
+    coordinator.animate(alongsideTransition: { _ in
+      presentedViewController.chromeView.alpha = 0
+    }, completion: { _ in
+      presentedView.removeFromSuperview()
+    })
+  }
+}

iphone/Maps/UI/BottomMenu/Presentation/BottomMenuTransitioning.swift

@@ -0,0 +1,35 @@
+final class BottomMenuTransitioning: NSObject, UIViewControllerAnimatedTransitioning {
+  private let isPresentation: Bool
+  
+  init(isPresentation: Bool) {
+    self.isPresentation = isPresentation
+    super.init()
+  }
+  
+  func transitionDuration(using _: UIViewControllerContextTransitioning?) -> TimeInterval {
+    return kDefaultAnimationDuration
+  }
+  
+  func animateTransition(using transitionContext: UIViewControllerContextTransitioning) {
+    guard let fromVC = transitionContext.viewController(forKey: .from),
+      let toVC = transitionContext.viewController(forKey: .to) else { return }
+    
+    let animatingVC = isPresentation ? toVC : fromVC
+    guard let animatingView = animatingVC.view else { return }
+    
+    let finalFrameForVC = transitionContext.finalFrame(for: animatingVC)
+    var initialFrameForVC = finalFrameForVC
+    initialFrameForVC.origin.y += initialFrameForVC.size.height
+    
+    let initialFrame = isPresentation ? initialFrameForVC : finalFrameForVC
+    let finalFrame = isPresentation ? finalFrameForVC : initialFrameForVC
+    
+    animatingView.frame = initialFrame
+    
+    UIView.animate(withDuration: transitionDuration(using: transitionContext),
+                   animations: { animatingView.frame = finalFrame },
+                   completion: { _ in
+                    transitionContext.completeTransition(true)
+    })
+  }
+}

iphone/Maps/UI/BottomMenu/Presentation/BottomMenuTransitioningManager.swift

@@ -0,0 +1,14 @@
+final class BottomMenuTransitioningManager: NSObject, UIViewControllerTransitioningDelegate {
+  func presentationController(forPresented presented: UIViewController, presenting: UIViewController?, source _: UIViewController) -> UIPresentationController? {
+    BottomMenuPresentationController(presentedViewController: presented,
+                                     presenting: presenting)
+  }
+  
+  func animationController(forPresented _: UIViewController, presenting _: UIViewController, source _: UIViewController) -> UIViewControllerAnimatedTransitioning? {
+    return BottomMenuTransitioning(isPresentation: true)
+  }
+  
+  func animationController(forDismissed _: UIViewController) -> UIViewControllerAnimatedTransitioning? {
+    return BottomMenuTransitioning(isPresentation: false)
+  }
+}