Add isIncludedInPinLayoutSizeCalculation property to Layoutable

README.md

@@ -1367,17 +1367,17 @@ The property expose the `UIKit` value [`UIView.keyboardLayoutGuide`](https://dev
 <a name="wrapContent"></a>
 ## WrapContent
 
-The following methods are useful to adjust view's width and/or height to wrap all its subviews. These methods also adjust subviews position to create a tight wrap.
+The following methods are useful to adjust view's width and/or height to wrap all its subviews that are included in the layout. These methods also adjust subviews position to create a tight wrap.
 
 **Methods:**
 
 * **`wrapContent()`**  
 **`wrapContent(padding: CGFloat)`**  
 **`wrapContent(padding: UIEdgeInsets)`**   
-Adjust the view's width and height to wrap all its subviews. The method also adjusts subviews's position to create a tight wrap. It is also possible to specify an optional padding around all subviews. 
+Adjust the view's width and height to wrap all its subviews that are included in the layout. The method also adjusts subviews's position to create a tight wrap. It is also possible to specify an optional padding around all subviews. 
 * **`wrapContent(:WrapType)`**  
 **`wrapContent(:WrapType, padding: CGFloat)`**  **`wrapContent(:WrapType, padding: UIEdgeInsets)`**  
-Adjust the view's width AND/OR height to wrap all its subviews. Accept a WrapType parameter to define the wrapping type. It is also possible to specify an optional padding around all subviews.
+Adjust the view's width AND/OR height to wrap all its subviews that are included in the layout. Accept a WrapType parameter to define the wrapping type. It is also possible to specify an optional padding around all subviews.
 
 **Types:** 
 

Sources/Extensions/UIView+PinLayout.swift

@@ -133,7 +133,7 @@ extension UIView: AutoSizeCalculable {
 
         layoutClosure()
 
-        let boundingRect = subviews.compactMap({ $0.autoSizingRectWithMargins }).reduce(CGRect.zero) { (result: CGRect, autoSizingRect: CGRect) -> CGRect in
+        let boundingRect = subviewsIncludedInSizeCalculation.compactMap({ $0.autoSizingRectWithMargins }).reduce(CGRect.zero) { (result: CGRect, autoSizingRect: CGRect) -> CGRect in
             return result.union(autoSizingRect)
         }
 

Sources/Layoutable.swift

@@ -36,3 +36,23 @@ public protocol Layoutable: AnyObject, Equatable, CustomDebugStringConvertible {
 
     func isLTR() -> Bool
 }
+
+private struct pinlayoutAssociatedKeys {
+    static var pinlayoutIsIncludedInSizeCalculation = UnsafeMutablePointer<Int8>.allocate(capacity: 1)
+}
+
+extension Layoutable {
+
+    var isIncludedInSizeCalculation: Bool {
+        get {
+            return objc_getAssociatedObject(self, &pinlayoutAssociatedKeys.pinlayoutIsIncludedInSizeCalculation) as? Bool ?? true
+        }
+        set {
+            objc_setAssociatedObject(self, &pinlayoutAssociatedKeys.pinlayoutIsIncludedInSizeCalculation, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
+        }
+    }
+
+    var subviewsIncludedInSizeCalculation: [PinView] {
+        return subviews.filter(\.isIncludedInSizeCalculation)
+    }
+}

Sources/PinLayout+WrapContent.swift

@@ -25,15 +25,15 @@ import AppKit
 
 extension PinLayout {
     /**
-     Adjust the view's width & height to wrap all its subviews. The method also adjust subviews position to create a tight wrap.
+     Adjust the view's width & height to wrap all its subviews that are included in the size calculation. The method also adjust subviews position to create a tight wrap.
      */
     @discardableResult
     public func wrapContent() -> PinLayout {
         return wrapContent(.all, padding: PEdgeInsets(top: 0, left: 0, bottom: 0, right: 0), { return "wrapContent()" })
     }
 
     /**
-     Adjust the view's width & height to wrap all its subviews. The method also adds a padding around all subviews.
+     Adjust the view's width & height to wrap all its subviews that are included in the size calculation. The method also adds a padding around all subviews.
 
      - Parameters:
      - padding: Specify a padding value.
@@ -45,7 +45,7 @@ extension PinLayout {
 
     /**
      The method...
-        - Adjust the view's width and height to wrap all its subviews.
+        - Adjust the view's width and height to wrap all its subviews that are included in the size calculation.
         - Adjust subviews's position to create a tight wrap.
         - Apply padding around all subviews.
 
@@ -59,7 +59,7 @@ extension PinLayout {
 
     /**
      The method...
-     - Adjust the view's width and height to wrap all its subviews.
+     - Adjust the view's width and height to wrap all its subviews that are included in the size calculation.
      - Adjust subviews's position to create a tight wrap.
 
      - Parameters:
@@ -72,7 +72,7 @@ extension PinLayout {
 
     /**
      The method...
-     - Adjust the view's width and height to wrap all its subviews.
+     - Adjust the view's width and height to wrap all its subviews that are included in the size calculation.
      - Adjust subviews's position to create a tight wrap.
      - Apply padding around all subviews.
 
@@ -87,7 +87,7 @@ extension PinLayout {
 
     /**
      The method...
-     - Adjust the view's width and height to wrap all its subviews.
+     - Adjust the view's width and height to wrap all its subviews that are included in the size calculation.
      - Adjust subviews's position to create a tight wrap.
      - Apply padding around all subviews.
 
@@ -101,11 +101,11 @@ extension PinLayout {
     }
 
     private func wrapContent(_ type: WrapType, padding: PEdgeInsets, _ context: Context) -> PinLayout {
-        let subviews = view.subviews
-        guard !subviews.isEmpty else { return self }
+        let includedSubviews = view.subviewsIncludedInSizeCalculation
+        guard !includedSubviews.isEmpty else { return self }
 
-        let firstViewRect = subviews[0].getRect(keepTransform: keepTransform)
-        let boundingRect = subviews.reduce(firstViewRect, { (result, view) in
+        let firstViewRect = includedSubviews[0].getRect(keepTransform: keepTransform)
+        let boundingRect = includedSubviews.reduce(firstViewRect, { (result, view) in
             result.union(view.getRect(keepTransform: keepTransform))
         })
 
@@ -131,7 +131,7 @@ extension PinLayout {
         }
 
         if offsetDx != 0 || offsetDy != 0 {
-            subviews.forEach { (view) in
+            includedSubviews.forEach { (view) in
                 let viewRect = view.getRect(keepTransform: keepTransform)
                 let newRect = viewRect.offsetBy(dx: offsetDx, dy: offsetDy)
                 view.setRect(newRect, keepTransform: keepTransform)

Sources/PinLayout.swift

@@ -84,6 +84,16 @@ public class PinLayout<PinView: Layoutable> {
         apply()
     }
 
+    /// A Boolean value that determines whether the view is included in the PinLayout's size calculation.
+    ///
+    /// An excluded view does not take up space in the layout
+    /// when using `wrapContent(_:padding:_:)` or `autoSizeThatFits(_:layoutClosure:)`.
+    /// The default value is `true`.
+    public var isIncludedInSizeCalculation: Bool {
+        get { return view.isIncludedInSizeCalculation }
+        set { view.isIncludedInSizeCalculation = newValue }
+    }
+
     #if os(iOS) || os(tvOS)
     public var safeArea: PEdgeInsets {
         if let view = view as? UIView {

Sources/Types.swift

@@ -186,11 +186,11 @@ public enum FitType {
 }
 
 @objc public enum WrapType: Int {
-    /// Adjust the view's width AND height to wrap all its subviews.
+    /// Adjust the view's width AND height to wrap all its subviews that are included in the size calculation.
     case all
-    /// Adjust only the view's width to wrap all its subviews. The view's height won't be modified.
+    /// Adjust only the view's width to wrap all its subviews that are included in the size calculation. The view's height won't be modified.
     case horizontally
-    /// Adjust only the view's height to wrap all its subviews. The view's width won't be modified.
+    /// Adjust only the view's height to wrap all its subviews that are included in the size calculation. The view's width won't be modified.
     case vertically
 }