Repo created

iphone/Maps/UI/PlacePage/PlacePageLayout/Layouts/IPlacePageLayout.swift

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+enum PlacePageState {
+  case closed(CGFloat)
+  case preview(CGFloat)
+  case previewPlus(CGFloat)
+  case expanded(CGFloat)
+  case full(CGFloat)
+
+  var offset: CGFloat {
+    switch self {
+    case .closed(let value):
+      return value
+    case .preview(let value):
+      return value
+    case .previewPlus(let value):
+      return value
+    case .expanded(let value):
+      return value
+    case .full(let value):
+      return value
+    }
+  }
+}
+
+protocol IPlacePageLayout: AnyObject {
+  var presenter: PlacePagePresenterProtocol? { get set }
+  var headerViewControllers: [UIViewController] { get }
+  var headerViewController: PlacePageHeaderViewController { get }
+  var bodyViewControllers: [UIViewController] { get }
+  var actionBar: ActionBarViewController? { get }
+  var navigationBar: UIViewController? { get }
+  var sectionSpacing: CGFloat { get }
+
+  func calculateSteps(inScrollView scrollView: UIScrollView, compact: Bool) -> [PlacePageState]
+}
+
+extension IPlacePageLayout {
+  var sectionSpacing: CGFloat { return 24.0 }
+}