Add horizontal right alignment support (#658)

rechsteiner · Apr 2, 2023 · a0d1b3c · a0d1b3c
1 parent 9d8e973
commit a0d1b3c
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Showing 2 changed files with 16 additions and 1 deletion.
diff --git a/Parchment/Classes/PagingCollectionViewLayout.swift b/Parchment/Classes/PagingCollectionViewLayout.swift
@@ -330,13 +330,24 @@ open class PagingCollectionViewLayout: UICollectionViewLayout, PagingLayout {
             // all the other cases we want to center them if the menu
             // alignment is set to .center
             default:
-                if case .center = options.menuHorizontalAlignment {
+                switch options.menuHorizontalAlignment {
+                case .center:
                     // Subtract the menu insets as they should not have an effect on
                     // whether or not we should center the items.
                     let offset = (view.bounds.width - previousFrame.maxX - adjustedMenuInsets.left) / 2
                     for attributes in layoutAttributes.values {
                         attributes.frame = attributes.frame.offsetBy(dx: offset, dy: 0)
                     }
+                case .right:
+                    // Subtract the menu insets as they should not have an effect on
+                    // whether or not we should right align the items.
+                    let offset = (view.bounds.width - previousFrame.maxX - adjustedMenuInsets.right)
+                    for attributes in layoutAttributes.values {
+                        attributes.frame = attributes.frame.offsetBy(dx: offset, dy: 0)
+                    }
+
+                default:
+                    break
                 }
             }
         }

diff --git a/Parchment/Enums/PagingMenuHorizontalAlignment.swift b/Parchment/Enums/PagingMenuHorizontalAlignment.swift
@@ -7,4 +7,8 @@ public enum PagingMenuHorizontalAlignment {
   // when PagingMenuItemSize is .fixed and the sum of the widths
   // of all the paging items are less than the paging menu
     case center
+    // Allows all paging items to be right centered within the paging menu
+    // when PagingMenuItemSize is .fixed and the sum of the widths
+    // of all the paging items are less than the paging menu
+    case right
 }