usesSafeAreaLayoutGuideLeadingTrailing (#174)

* usesSafeAreaLayoutGuideLeadingTrailing

* add changelog

* remove green bg color

* use configuration

* update changelog

---------

Co-authored-by: Mary Baptista Martinez <mary.baptistamartinez@airbnb.com>

Author: marybm-dev

CHANGELOG.md

@@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 - Expose `forceLayout` in `EpoxySwiftUIHostingView` for updating the hosting view size from outside.
+- Added `CollectionViewConfiguration.usesSafeAreaLayoutGuideLeadingTrailingAnchors` to respect leading/trailing layoutGuide anchors which are needed for landscape orientation. Defaults to `false` and uses the view's `leadingAnchor` and `trailingAnchor`. When `true` it will use the view's `safeAreaLayoutGuide` `leadingAnchor` and `trailingAnchor`.
 
 ### Changed
 - `AnyItemModel` now implements the `ErasedContentProviding` protocol.

Sources/EpoxyCollectionView/CollectionView/CollectionViewConfiguration.swift

@@ -13,11 +13,13 @@ public struct CollectionViewConfiguration {
   public init(
     usesBatchUpdatesForAllReloads: Bool = true,
     usesCellPrefetching: Bool = true,
-    usesAccurateScrollToItem: Bool = true)
+    usesAccurateScrollToItem: Bool = true,
+    usesSafeAreaLayoutGuideLeadingTrailingAnchors: Bool = false)
   {
     self.usesBatchUpdatesForAllReloads = usesBatchUpdatesForAllReloads
     self.usesCellPrefetching = usesCellPrefetching
     self.usesAccurateScrollToItem = usesAccurateScrollToItem
+    self.usesSafeAreaLayoutGuideLeadingTrailingAnchors = usesSafeAreaLayoutGuideLeadingTrailingAnchors
   }
 
   // MARK: Public
@@ -66,4 +68,10 @@ public struct CollectionViewConfiguration {
   ///
   /// - SeeAlso: `CollectionViewScrollToItemHelper`
   public var usesAccurateScrollToItem: Bool
+
+  /// Respects leading and trailing safe areas from the `UILayoutGuide` when `true`. Helpful
+  /// for supporting landscape orientation so that content is not rendered in the notch area.
+  ///
+  /// Defaults to `false`
+  public var usesSafeAreaLayoutGuideLeadingTrailingAnchors: Bool
 }

Sources/EpoxyCollectionView/ViewControllers/CollectionViewController.swift

@@ -145,12 +145,17 @@ open class CollectionViewController: UIViewController {
     view.addSubview(collectionView)
     collectionView.layoutDelegate = self
 
+    let layoutGuide = view.safeAreaLayoutGuide
+    let useLayoutGuide = configuration.usesSafeAreaLayoutGuideLeadingTrailingAnchors
+    let leadingAnchor = useLayoutGuide ? layoutGuide.leadingAnchor : view.leadingAnchor
+    let trailingAnchor = useLayoutGuide ? layoutGuide.trailingAnchor : view.trailingAnchor
+
     collectionView.translatesAutoresizingMaskIntoConstraints = false
     NSLayoutConstraint.activate([
       collectionView.topAnchor.constraint(equalTo: view.topAnchor),
-      collectionView.leadingAnchor.constraint(equalTo: view.leadingAnchor),
+      collectionView.leadingAnchor.constraint(equalTo: leadingAnchor),
       collectionView.bottomAnchor.constraint(equalTo: view.bottomAnchor),
-      collectionView.trailingAnchor.constraint(equalTo: view.trailingAnchor),
+      collectionView.trailingAnchor.constraint(equalTo: trailingAnchor),
     ])
 
     if let sections = initialSections {