Fixes for the refactor of the ButtonGroup/SelfSizingCollectionView

Merge branch 'mbruce/bugfixes' of https://gitlab.verizon.com/BPHV_MIPS/vds_ios.git into feature/notificationView

# Conflicts:
#	VDS/Components/Buttons/ButtonGroup/ButtonGroup.swift

Signed-off-by: Matt Bruce <matt.bruce@verizon.com>

VDS/Classes/SelfSizingCollectionView.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 import UIKit
+import Combine
 
 /// UICollectionView subclassed to deal with Changing the size of itself based on its children and layout and changes of its contentSize.
 @objc(VDSSelfSizingCollectionView)
@@ -34,10 +35,13 @@ public final class SelfSizingCollectionView: UICollectionView {
     // MARK: - Private Properties
     //--------------------------------------------------
     private var contentSizeObservation: NSKeyValueObservation?
+    private var collectionViewHeight: NSLayoutConstraint?
+    private var anyCancellable: AnyCancellable?
 
     //--------------------------------------------------
     // MARK: - Overrides
     //--------------------------------------------------
+ 
     /// The natural size for the receiving view, considering only properties of the view itself.
     public override var intrinsicContentSize: CGSize {
         let contentSize = self.contentSize
@@ -63,12 +67,16 @@ public final class SelfSizingCollectionView: UICollectionView {
         //ensure autoLayout uses intrinsic height
         setContentHuggingPriority(.required, for: .vertical)
         setContentCompressionResistancePriority(.required, for: .vertical)
+        collectionViewHeight = heightAnchor.constraint(equalToConstant: 0).activate()
 
         // Observing the value of contentSize seems to be the only reliable way to get the contentSize after the collection view lays out its subviews.
         self.contentSizeObservation = self.observe(\.contentSize, options: [.old, .new]) { [weak self] _, change in
             // If we don't specify `options: [.old, .new]`, the change.oldValue and .newValue will always be `nil`.
             if change.newValue != change.oldValue {
                 self?.invalidateIntrinsicContentSize()
+                if let height = change.newValue?.height {
+                    self?.collectionViewHeight?.constant = height
+                }
             }
         }
     }

VDS/Components/Buttons/ButtonGroup/ButtonGroup.swift

@@ -9,7 +9,6 @@ import Foundation
 import UIKit
 import VDSColorTokens
 import VDSFormControlsTokens
-import Combine
 
 /// A button group contains combinations of related CTAs including ``Button``, ``TextLink``, and ``TextLinkCaret``. This group component controls a combination's orientation, spacing, size and allowable size pairings.
 @objc(VDSButtonGroup)
@@ -63,9 +62,7 @@ open class ButtonGroup: View {
     open var buttons: [ButtonBase] = [] { didSet { setNeedsUpdate() } }
     
     private var _childWidth: ChildWidth?
-    
+        
-    private var anyCancellable: AnyCancellable?
-    
     /// If provided, width of Button components will be rendered based on this value. If omitted, default button widths are rendered.
     open var childWidth: ChildWidth? {
         get { _childWidth }
@@ -105,7 +102,6 @@ open class ButtonGroup: View {
     //--------------------------------------------------
     // MARK: - Private Properties
     //--------------------------------------------------
-    fileprivate var collectionViewHeight: NSLayoutConstraint?
     
     fileprivate lazy var positionLayout = ButtonGroupPositionLayout().with {
         $0.position = .center
@@ -134,12 +130,6 @@ open class ButtonGroup: View {
         super.setup()
         addSubview(collectionView)
         collectionView.pinToSuperView()
-        collectionViewHeight = heightAnchor.constraint(equalToConstant: VDS.Button.Size.large.height)
-        collectionViewHeight?.activate()
-        anyCancellable = positionLayout.$layoutHeight.receive(on: RunLoop.main).sink { [weak self] _ in
-            guard let self else { return }
-            self.collectionViewHeight?.constant = self.collectionView.intrinsicContentSize.height
-        }
     }
     
     //--------------------------------------------------
@@ -190,7 +180,6 @@ open class ButtonGroup: View {
         DispatchQueue.main.async { [weak self] in
             guard let self else { return }
             self.collectionView.collectionViewLayout.invalidateLayout()
-            self.collectionViewHeight?.constant = self.collectionView.intrinsicContentSize.height
         }
     }
 }

VDS/Components/Buttons/ButtonGroup/ButtonGroupPositionLayout.swift

@@ -193,6 +193,9 @@ class ButtonGroupPositionLayout: UICollectionViewLayout {
             // get the rect size of the button
             itemSize = delegate.collectionView(collectionView, sizeForItemAtIndexPath: indexPath)
             
+            // ensure the width is not greater than the collectionViewWidth
+            itemSize.width = min(itemSize.width, collectionViewWidth)
+            
             // determine if the current button will fit in the row
             let rowItemCount = rows.last?.attributes.count ?? 0